CN114841303A - Cabinet counting method and device - Google Patents

Abstract

The application relates to a cabinet counting method and device. The counting method of the cabinet comprises the steps of acquiring a first weight change value of a pressure sensor when the cabinet body is monitored to be closed; when the absolute value of the first weight change value is larger than a first threshold value, controlling the RFID read-write module to scan the label information, and obtaining a second weight change value according to the changed label information obtained by scanning and the preset weight values corresponding to different label information; calculating a difference between the first weight change value and the second weight change value; and when the absolute value of the difference is smaller than a second threshold value, counting according to the label information obtained by scanning. According to the RFID reading and writing module, the RFID reading and writing module is combined with weighing mixed counting, the data acquired by the pressure sensor data and the RFID reading and writing module are verified, the problem that the result of single RFID counting is unreliable is avoided, and the counting reliability of the RFID reading and writing module is improved.

Description

A kind of cabinet counting method and device

technical field

The present invention relates to the technical field of new generation information technology and biomedical industry, in particular to a cabinet counting method and device.

Background technique

At present, for items with RFID (Radio Frequency Identification, radio frequency identification) tags, RFID readers are usually used to count them. When the items are placed inside the cabinet, the stacking of items will easily lead to scanning errors of the RFID reader. As a result, the counting of the RFID reader is unreliable, and the RFID device cannot verify the accuracy of its scanning results.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a cabinet counting method and device for the problem that the counting of the RFID reader is unreliable and the RFID equipment cannot verify the accuracy of the scanning result.

A cabinet counting method, comprising an RFID read-write module and a pressure sensor, the method comprising:

When it is detected that the cabinet body is closed, the first weight change value of the pressure sensor is obtained;

When the absolute value of the first weight change value is greater than the first threshold value, control the RFID read-write module to scan the label information, and obtain the weight value corresponding to the changed label information obtained by scanning and the preset different label information. the second weight change value;

calculating the difference between the first weight change value and the second weight change value;

When the absolute value of the difference is smaller than the second threshold, counting is performed according to the label information obtained by scanning.

In one embodiment, the cabinet includes a plurality of items to be counted, each of the items to be counted includes corresponding label information, and each label information includes weight information corresponding to the items to be counted, and the method further includes:

pre-store the label information of the plurality of items to be counted;

The initial weight values of the multiple items to be counted are acquired according to the pre-stored label information and corresponding weight information of the multiple items to be counted.

In one of the embodiments, described controlling the RFID reader to scan the label information, and according to the weight value corresponding to the changed label information obtained by scanning and the preset different label information, obtaining the second weight change value includes:

Obtain the tag information scanned by the RFID read-write module;

Obtain the changed label information according to the scanned label information and the label information of the pre-stored items to be counted;

The second weight change value is obtained according to the changed label information and the weight information of the corresponding label.

In one of the embodiments, described controlling the RFID read-write module to scan the label information, and according to the weight value corresponding to the changed label information obtained by scanning and the preset different label information, obtaining the second weight change value includes:

Obtain the tag information scanned by the RFID read-write module;

Obtain the current weight value according to the scanned label information and the weight information of the corresponding label;

According to the current weight value and the initial weight value to the second weight change value.

In one of the embodiments, the cabinet includes a partition plate, and the partition plate divides the cabinet into an upper cavity and a lower cavity, and the RFID read-write module includes an RFID reader, a first an antenna, a second antenna and a third antenna, the first antenna is arranged on the bottom surface of the cabinet body, the second antenna is arranged on the top surface of the cabinet body, and at least one of the third antennas is arranged on the The rear side, left side or right side of the cabinet body; the cabinet body includes a partition plate, the pressure sensor includes a first pressure sensor and a second pressure sensor, and the first pressure sensor is arranged on the cabinet body The bottom surface of the cabinet, or the side of the partition plate facing the bottom surface, the second pressure sensor is arranged on the top surface of the cabinet, or the side of the partition plate facing the top surface, the Methods also include:

Obtain the initial weight value of the first pressure sensor or the second pressure sensor before monitoring the door of the cabinet;

Correspondingly, when monitoring that the door of the cabinet is closed, acquiring the first weight change value of the pressure sensor includes:

When monitoring that the cabinet body is closed, obtain the current weight value of the first pressure sensor or the second pressure sensor;

Obtaining the first weight change value according to the difference between the current weight value and the initial weight value corresponding to the first pressure sensor or the second pressure sensor;

Correspondingly, when the absolute value of the first weight change value is greater than the first threshold, controlling the RFID read-write module to scan the tag information includes:

When the absolute value of the first weight change value corresponding to the first pressure sensor is greater than the first threshold, the RFID reader/writer is controlled to start, and the RFID reader/writer drives the first antenna or the third antenna scanning;

When the absolute value of the first weight change value corresponding to the second pressure sensor is greater than the first threshold, the RFID reader/writer is controlled to start, and the RFID reader/writer drives the second antenna or the third antenna Scanning; when the absolute value of the first weight change value corresponding to the first pressure sensor and the second pressure sensor is greater than the first threshold at the same time, control the RFID reader to start, and the RFID reader The first antenna, the second antenna and the third antenna are driven to scan.

In one of the embodiments, it further includes a database, the database is connected in communication with the RFID reader, the database is used for pre-storing label information of the plurality of items to be counted, and the label information further includes a label code , the label information that is changed according to the scanned label information and pre-stored label information of the plurality of items to be counted includes:

uploading the scanned tag information to the database;

Comparing the label code corresponding to the scanned label information with the label code corresponding to the label information of the pre-stored items to be counted to obtain the changed label information, wherein the changed label information includes the added label codes and reduced said label codes;

Correspondingly, the described second weight change value is obtained according to the changed label information and the weight information of the corresponding label, including:

Extracting the weight information corresponding to the increased label code and the weight information corresponding to the decreased label code;

The second weight change value is obtained by calculating the weight information.

In one embodiment, the method further includes:

The first pre-value is half of the weight of the smallest item in pre-storage;

The second predetermined value is the maximum error value of the minimum item weight to be counted.

In one embodiment, it also includes:

Obtain the initial weight value of the pressure sensor before monitoring the door of the cabinet;

Correspondingly, the acquiring the first weight change value of the pressure sensor includes:

When it is detected that the cabinet body is closed, the current stable weight value of the pressure sensor is obtained;

Obtaining the first weight change value according to the current stable weight value and the initial weight value;

Correspondingly, when the absolute value of the difference is less than the second pre-value, count according to the label information obtained by scanning, including:

Save the current stable weight value of the pressure sensor.

A cabinet counting device, comprising:

The cabinet is used to store multiple label information;

a cabinet door, movably connected with the cabinet body;

The door switch detection module is used to detect the switch state of the cabinet door;

RFID read-write module for scanning a plurality of the tag information;

A pressure sensor is arranged on the bottom surface of the cabinet, and a plurality of the label information is placed on the pressure sensor for measuring the weight change value of the plurality of label information;

The processor is configured to execute the above-mentioned cabinet counting method according to the switch state, a plurality of the label information and the weight change value, so as to realize counting.

In one of the embodiments, the cabinet includes a partition plate, and the partition plate divides the cabinet into an upper cavity and a lower cavity; the RFID read-write module includes an RFID reader, a first an antenna, a second antenna and a third antenna, the first antenna is arranged on the bottom surface of the cabinet body, the second antenna is arranged on the top surface of the cabinet body, and at least one of the third antennas is arranged on the On the rear side, left side or right side of the cabinet, the RFID reader can drive the first antenna, the second antenna and the third antenna to scan the tag information; the cabinet includes A partition plate, the pressure sensor includes a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged on the bottom surface of the cabinet, or the side of the partition plate facing the bottom surface, the The second pressure sensor is arranged on the top surface of the cabinet, or on the side of the partition plate facing the top surface.

The above-mentioned cabinet counting method includes obtaining the first weight change value of the pressure sensor when monitoring that the cabinet body is closed; when the absolute value of the first weight change value is greater than the first threshold value, controlling the RFID read-write module to scan the label information, and according to The weight value corresponding to the changed label information obtained by scanning and the preset different label information is obtained, and the second weight change value is obtained; the difference between the first weight change value and the second weight change value is calculated; when the absolute value of the difference is less than the first weight change value; When the threshold is 2, count according to the label information obtained by scanning. This application adopts the mixed counting of RFID reading and writing module combined with weighing. By verifying the pressure sensor data and the data obtained by the RFID reading and writing module, the problem of unreliable results of single counting through RFID is avoided, and the reliability of the RFID reading and writing module is improved. Counting reliability. In addition, unlike the existing RFID counting, which starts the RFID reading and writing module scanning when the cabinet door is detected to be closed, the weighing data is obtained first when the cabinet door is detected to be closed, and the weighing data is used to determine whether the cabinet door is opened After the behavior of picking and placing items, that is, after judging that the weight change value of the pressure sensor is greater than the threshold, then start the RFID reading and writing module scanning, which avoids the RFID reading and writing module scanning after each door is closed, even if no items are picked and placed. , which saves equipment resources and avoids counting errors caused by unnecessary repetitive scanning and updating of data.

Description of drawings

Fig. 1 is the flow chart of embodiment one cabinet counting method;

Fig. 2 is the structural representation of the door closing of the cabinet counting device in the second embodiment;

3 is a schematic structural diagram of the door of the cabinet counting device in Embodiment 2;

Fig. 4 is the signal transmission schematic diagram of the RFID read-write module in the cabinet counting device of the second embodiment;

5 is a schematic structural diagram of an antenna in a cabinet counting device in Embodiment 2;

6 is a schematic structural diagram of a pressure sensor in the cabinet counting device of the second embodiment;

FIG. 7 is another flowchart of the cabinet counting method in Embodiment 1;

8 is a flow chart of controlling the RFID read-write module to scan the label information in the cabinet counting method according to the first embodiment, and obtain the second weight change value according to the changed label information obtained by scanning and the preset weight values corresponding to different label information ;

FIG. 9 is a diagram showing the control of the RFID read-write module to scan the label information in the cabinet counting method according to the first embodiment, and obtains another variation of the second weight change value according to the changed label information obtained by scanning and the weight values corresponding to the preset different label information. flow chart;

Fig. 10 is the flow chart of obtaining the first weight change value of the pressure sensor 40 when monitoring the door closing of the cabinet 20 in the cabinet counting method of the embodiment 1;

11 is a flowchart of controlling the RFID read-write module 60 to scan the tag information when the absolute value of the first weight change value is greater than the first threshold value in the cabinet counting method of Embodiment 1;

12 is a flowchart of obtaining changed label information according to scanned label information and pre-stored label information of a plurality of items to be counted in a cabinet counting method in Embodiment 1;

Fig. 13 is a flow chart of obtaining a second weight change value according to the changed label information and the weight information of the corresponding label in the cabinet counting method in the first embodiment.

Reference numerals: cabinet counting device 10 , cabinet 20 , cabinet door 30 , pressure sensor 40 , first pressure sensor 41 , second pressure sensor 42 , door switch detection module 50 , RFID read-write module 60 , RFID reader-writer 61. Antenna 62, first antenna 621, second antenna 622, third antenna 623, upper part 6231, lower part 6233, upper cavity 71, lower cavity 72, suspension frame 80.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing particular embodiments only and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

The present application provides a cabinet counting method, which is applied to a cabinet counting device 10. Referring to FIG. 2 and FIG. 3 , the cabinet counting device 10 includes cabinets 20 to be counted, wherein the medical medicine cabinet is For example, in the process of using the medical medicine cabinet, it is often necessary to weigh and count the medical products of the medicine type to judge the use status of the medicines. In this embodiment, the cabinet counting method includes an RFID reading and writing module 60 and a pressure sensor 40 , a plurality of items to be counted are placed in the cabinet 20 , and RFID tags are attached to the items to be counted, the RFID reading and writing module 60 and the pressure sensor 40 They are respectively arranged inside the cabinet body 20. In this method, the RFID tags are counted by the RFID read-write module 60, and the data obtained by the pressure sensor 40 and the data obtained by the RFID read-write module 60 are verified, so as to realize the detection of the cabinet body 20. Accurate count of inner tags.

Referring to FIG. 1, in this embodiment, the cabinet counting method includes the following steps:

Step S200, when it is monitored that the cabinet body 20 is closed, the first weight change value of the pressure sensor 40 is obtained.

Specifically, when the articles with RIFD labels are stored inside the cabinet 20, the pressure sensor 40 is in a state of continuous weighing due to the pressure of the articles. 30 performs the door closing operation, the door opening and closing detection module 50 receives the door closing signal, and then transmits the door closing signal to the processor, and the processor receives the door closing signal and obtains the first weight change value of the pressure sensor 40 and records it as M1.

The first weight change value M1 is calculated according to the last initial weight value of the pressure sensor 40 and the current weight value, the last initial weight value is the weight value saved after the cabinet door 30 was closed last time, and the current weight value is The stable weight value measured by the pressure sensor 40 after the front cabinet door 30 is closed.

Step S400, when the absolute value of the first weight change value is greater than the first threshold value, control the RFID read-write module 60 to scan the label information, and obtain the weight value corresponding to the changed label information obtained by scanning and the preset different label information. The second weight change value.

The first threshold is a preset value, the size of the first threshold is related to the weight of the pre-stored items to be counted, and the first threshold is half of the weight of the smallest item in the items to be counted, for example, when the smallest item to be counted If the weight of the item is 5g, the value of the first threshold is 2.5. It can be understood that the first threshold is used as the basis for judging whether the user has taken and placed the items inside the cabinet 20. When the change value is greater than the first threshold, it means that the user has performed the pick and place operation, and the processor continues the next step. If it is less than the first threshold, it means that the user has not performed a pick-and-place operation on the item, and the pressure sensor 40 continues to acquire the change value.

Specifically, when the processor determines that the absolute value of the first weight change value ∣M1∣ is greater than the first threshold, it means that the user has performed a pick and place operation on the items in the cabinet 20 this time, and the processor controls the RFID read-write module 60 After startup, the RFID read-write module 60 reads the RFID tag in the cabinet 20, and obtains the second weight change value M2 according to the read tag information. Wherein, when the processor determines that the absolute value of the first weight change value ∣ M1∣ is smaller than the first threshold, it means that the user has not performed a pick-and-place operation on the items in the cabinet 20 this time, and the processor does not perform a feedback operation at this time , the pressure sensor 40 continues to weigh, until the absolute value ∣M1∣ of the first weight value obtained by the pressure sensor 40 is greater than the first threshold, the processor controls the RFID read-write module 60 to start.

Step S600: Calculate the difference between the first weight change value and the second weight change value.

Specifically, the processor saves the acquired first weight change value M1 and the second weight change value M2, and calculates the _{difference Mdifference} , where _Mdifference =M1-M2.

Step S800, when the absolute value of the difference is less than the second threshold, count according to the label information obtained by scanning.

The second threshold is a preset value, and the size of the second threshold is related to the weight error value of the pre-stored items to be counted, wherein the weight error value is related to the production accuracy of the item weight, and the user sets the value of the second threshold value as The maximum error value of the minimum item weight to be counted, for example, when the weight value of the minimum item to be counted is 5g and the production accuracy is 10%, the maximum error value of the minimum medicine bottle is 4.5, at this time 4.5 is the predetermined value second threshold. It can be understood that the second threshold is used as the basis for judging whether the error is within a reasonable range. When the absolute value of the difference is less than the second threshold, it means that the error at this time is within a reasonable range. Counting can be used as an accurate count. When the absolute value of the difference is greater than the second threshold, it means that the error is large at this time, indicating that there may be overlapping and stacking of labels in the cabinet, missing labels, etc.

Specifically, when the processor determines that the absolute value of the _difference ∣Mdifference∣ is smaller than the second threshold, the error at this time is within a reasonable range, that is, the weight value of the pressure sensor 40 and the weight obtained by the RFID read-write module 60 at this time. The value is regarded as an accurate value, so the processor updates the stored first weight change value M1 to the initial weight value of the pressure sensor 40 and accurately counts according to the tag information of the RFID read-write module 60 . When the processor determines that the absolute value of the _difference ∣Mdifference∣ is greater than the second threshold, the error at this time is determined as an abnormal state, and the user is reminded to check whether the items placed in the cabinet 20 have missing RFID labels, overlapping RFID labels, etc. Happening. It can be understood that the reminding function is realized by a voice notification module, a display module and the like built in the cabinet 20 .

In this embodiment, referring to FIG. 7 , the cabinet 20 includes a plurality of items to be counted, each item to be counted includes corresponding label information, and each label information includes weight information corresponding to the item to be counted, and the cabinet counting method further includes: :

Step S002, pre-store label information of a plurality of items to be counted.

Specifically, before the initial count, each item to be counted has a piece of label information, and the processor stores the label information of different items to be counted in the database, for example, each category of medicine corresponds to different weights and medicine information, The drug information of each category is stored in the database.

Step S004: Acquire initial weight values of multiple items to be counted according to pre-stored label information and corresponding weight information of multiple items to be counted.

Specifically, the processor pre-stores the items to be counted and their corresponding tag information in the database. When the RFID read-write module 60 reads the tag information of multiple tags in the cabinet, the processor receives the multiple tag information, and according to The obtained multiple label information extracts the corresponding weight information from the database, and the processor aggregates and saves the multiple weight information as an initial weight value.

In one embodiment, referring to FIG. 8 , in step S400 , the RFID read-write module 60 is controlled to scan the label information, and the second weight change value is obtained according to the changed label information obtained by scanning and the weight values corresponding to the preset different label information. include:

Step S412 , acquiring the tag information scanned by the RFID read-write module 60 .

Specifically, after the processor receives the door closing signal sent by the door opening and closing detection module 50, the processor controls the RFID reading and writing module 60 to start, and the RFID reading and writing module 60 scans the labels inside the cabinet 20 and reads the label information of multiple labels. .

In step S414, the changed label information is obtained according to the scanned label information and the label information of the pre-stored multiple items to be counted.

Specifically, the processor compares the scanned label information with the pre-stored label information, and obtains the changed label information, that is, the newly added label information or the reduced label information compared with the pre-stored label information.

Step S416, obtaining a second weight change value according to the changed label information and the weight information of the corresponding label.

Specifically, the user stores the label information of different categories of medicines to be counted in the database in advance, and the corresponding weight information can be extracted according to the scanned label information. The processor can extract the corresponding weight information according to the changed label information, and summarize the weight. information to obtain the second weight change value M2.

In one embodiment, referring to FIG. 9 , in step S400, the RFID read-write module 60 is controlled to scan the label information, and the second weight change value is obtained according to the changed label information obtained by scanning and the weight values corresponding to different preset label information. include:

Step S422 , acquiring the tag information scanned by the RFID reading and writing module 60 .

Specifically, after the processor receives the door closing signal sent by the door opening and closing detection module 50, the processor controls the RFID reading and writing module 60 to start, and the RFID reading and writing module 60 scans the labels inside the cabinet 20 and reads the label information of multiple labels. .

Step S424: Obtain the current weight value according to the scanned label information and the weight information of the corresponding label.

Specifically, the user stores the label information of different categories of medicines to be counted in the database in advance, and the corresponding weight information can be extracted according to the scanned label information. The processor can extract the corresponding weight information according to the scanned label information, and summarize and save it. The weight information to get the current weight value.

Step S426, according to the current weight value and the initial weight value to the second weight change value.

Specifically, the processor extracts the stored initial weight value, calculates the difference between the current weight value and the initial weight value, and the difference is the second weight change value M2.

2-5, in this embodiment, the RFID reader/writer module 60 includes an RFID reader/writer 61 and multiple antennas 62, and the multiple antennas 62 include a first antenna 621, a second antenna 622 and a third antenna 623, The first antenna 621 is disposed on the bottom surface of the cabinet 20 , the second antenna 622 is disposed on the top surface of the cabinet 20 , and at least one third antenna 623 is disposed on the rear, left or right side of the cabinet 20 . Specifically, the processor can control the RFID reader/writer 61 to start, and the RFID reader/writer 61 drives the first antenna 621, the second antenna 622 and the third antenna 623 to scan the tags of the items to be counted. The controller 61 can drive at least one of the first antenna 621 , the second antenna 622 and the third antenna 623 to scan the label, so as to flexibly control the antenna 62 to scan the partial area of the cabinet 20 .

In this embodiment, the cabinet body 20 includes a partition plate, which can shield signals. The partition plate divides the interior of the cabinet body 20 into an upper cavity 71 and a lower cavity 72 , and the first antenna 621 scans the lower cavity 72. The second antenna 622 scans the upper cavity 71, and the third antenna 623 can scan both the upper cavity 71 and the lower cavity 72. The pressure sensor 40 includes a first pressure sensor 41 and a second pressure sensor 42 , the first pressure sensor 41 is arranged on the bottom surface of the cabinet 20 or the side of the partition plate facing the bottom surface, and the second pressure sensor 42 is arranged on the cabinet body The top surface of 20, or the side of the partition plate facing the top surface. Specifically, the processor is connected in communication with the first pressure sensor 41 and the second pressure sensor 42, respectively, and when the processor determines that the first weight change value corresponding to the first pressure sensor 41 or the second pressure sensor 42 is greater than the first threshold, the processing The controller can control the scanning of the antenna 62 in the corresponding area, so as to save equipment resources and avoid unnecessary repeated scanning and counting errors caused by updating data.

In this embodiment, the counting method of the cabinet 20 further includes:

When it is monitored that the cabinet body 20 is opened, the initial weight value of the first pressure sensor 41 or the second pressure sensor 42 is obtained.

Specifically, before the initial weighing, that is, before the processor detects that the cabinet 20 is opened, if there is an item in the cabinet 20, the initial value of the pressure sensor 40 is obtained, and if there is no item in the cabinet 20, the pressure sensor 40 The initial weight value of is treated as 0. It can be understood that the initial weight value may be the saved weight value after the door was closed last time. The processor is connected in communication with the first pressure sensor 41 and the second pressure sensor 42, and communicates with the processor through different channels, and the processor stores the initial weight values of the first pressure sensor 41 and the second pressure sensor 42 respectively.

Referring to Figure 10, correspondingly, in step S200, when it is monitored that the cabinet body 20 is closed, acquiring the first weight change value of the pressure sensor 40 includes:

Step S202, when monitoring the door closing of the cabinet 20, obtain the current weight value of the first pressure sensor 41 or the second pressure sensor 42;

In step S204, the first weight change value is obtained according to the difference between the current weight value corresponding to the first pressure sensor 41 or the second pressure sensor 42 and the initial weight value.

Specifically, if the user picks up and places items stored in the cabinet 20, the first pressure sensor 41 and the second pressure sensor 42 are constantly weighing, and the weighing results will change. When the processor detects that the cabinet 20 is closed, the first pressure sensor 41 and the second pressure sensor 42 A pressure sensor 41 and a second pressure sensor 42 obtain the current weight value respectively, and the processor calculates the corresponding difference value for the first pressure sensor 41 and the second pressure sensor 42 respectively, so as to obtain the corresponding first weight change value. The first weight change value can determine whether the user picks and places the items inside the cabinet 20 . It can be understood that, according to the first weight change value, the processor can further determine whether the user picks and places the item in the upper cavity 71 or the item in the lower cavity 72.

Referring to Figure 11, correspondingly, in step S400, when the absolute value of the first weight change value is greater than the first threshold, controlling the RFID read-write module 60 to scan the tag information includes:

Step S402, when the absolute value of the first weight change value corresponding to the first pressure sensor 41 is greater than the first threshold, control the RFID reader 61 to start, and the RFID reader 61 drives the first antenna 621 and the third antenna 623 to scan.

Specifically, the processor calculates the magnitude of the absolute value of the first weight change value of the first pressure sensor 41 and the first threshold value through the passage of the first pressure sensor 41, and when the processor determines that the absolute value is greater than the first threshold value, the description The user picks and places the items in the lower cavity 72. Since the area scanned by the first antenna 621 and the third antenna 623 includes the lower cavity 72, the processor controls the RFID reader 61 to start, and the RFID reader 61 drives the first The antenna 621 or the third antenna 623 scans the items in the lower cavity 72 . It can be understood that, in order to prevent scanning errors, the RFID reader/writer 61 can also drive the first antenna 621 and the third antenna 623 to scan at the same time, thereby expanding the scanning range.

Step S404, when the absolute value of the first weight change value corresponding to the second pressure sensor 42 is greater than the first threshold, control the RFID reader 61 to start, and the RFID reader 61 drives the second antenna 622 or the third antenna 623 to scan.

Specifically, the processor calculates the magnitude of the absolute value of the first weight change value of the second pressure sensor 42 and the first threshold value through the passage of the second pressure sensor 42. When the processor determines that the absolute value is greater than the first threshold value, it indicates that The user picks and places the items in the upper cavity 71. Since the area scanned by the second antenna 622 and the third antenna 623 includes the upper cavity 71, the processor controls the RFID reader 61 to start, and the RFID reader 61 drives the second The antenna 622 or the third antenna 623 scans the items in the upper cavity 71 . It can be understood that, in order to prevent scanning errors, the RFID reader/writer 61 can also drive the second antenna 622 and the third antenna 623 to scan at the same time, thereby expanding the scanning range.

Step S406, when the absolute value of the first weight change value corresponding to the first pressure sensor 41 and the second pressure sensor 42 is greater than the first threshold at the same time, control the RFID reader 61 to start, and the RFID reader 61 drives the first antenna 621 , the second antenna 622 and the third antenna 623 scan.

Specifically, if the absolute value of the corresponding first weight change value calculated by the processor through the passage of the first pressure sensor 41 and the second pressure sensor 42 is greater than the first threshold value, it means that the user simultaneously controls the upper cavity 71 and the lower The items in the cavity 72 are picked and placed, the processor controls the RFID reader 61 to start, and the RFID reader 61 drives the first antenna 621 , the second antenna 622 and the third antenna 623 to scan the items in the cabinet 20 . It can be understood that the user can preset the scanning time of each antenna 62, for example, the user sets the scanning time of each antenna 62 to be about 3s, wherein the scanning time can be in the range of 1s-5s, that is, during the scanning During a period of time, the RFID reader 61 continuously scans the tags inside the cabinet 20 through the antenna 62 .

In another embodiment, the RFID reader/writer 61 includes a plurality of RFID readers 61, and the plurality of RFID readers 61 are correspondingly connected to one antenna 62 for communication, or one of the RFID readers 61 communicates with two antennas 62 respectively, and the other one The RFID reader 61 communicates with one antenna 62. When the processor controls multiple RFID readers 61 to drive and scan, the processor combines and deduplicates the tag information obtained by the multiple RFID readers 61 to ensure the cabinet 20 The internal label information is not repeated to avoid inaccurate counting.

In this embodiment, the database is connected in communication with the RFID reader/writer 61 and the pressure sensor 40. The database is used to pre-store label information of a plurality of items to be counted, and the label information also includes label codes. Wherein, each label information corresponds to a unique label code, and the label code may be an ID code, a two-dimensional code, a barcode, or the like.

Referring to Figure 12, wherein, step S414, according to the scanned label information and pre-stored label information of a plurality of items to be counted The changed label information includes:

Step S4142, upload the scanned label information to the database.

Specifically, the RFID reader 61 wirelessly communicates with the RFID tag through the antenna 62 to read the tag information of the RFID tag inside the cabinet 20, and the processor uploads and saves the tag information to the database.

Step S4144, compare the label code corresponding to the scanned label information with the label code corresponding to the label information of the pre-stored multiple items to be counted to obtain the changed label information, wherein the changed label information includes the increased label code and the decreased label code. .

Specifically, each label information has a unique label code, the processor extracts the label code corresponding to the obtained label information, and compares it with the label codes corresponding to the label information of the pre-stored multiple items to be counted, and determines the changed label code. Wherein, the changed label codes include increased label codes and decreased label codes. It can be understood that the tag code of the pre-stored tag information can be saved as a tag code list, and when the tag information acquired by the RFID reader 61 is uploaded to the database, the tag code of the acquired tag information can be extracted first, and the tag code Compare with the pre-stored tag code list to confirm the changed tag code.

With reference to Figure 13, correspondingly, step S416 obtains the second weight change value according to the changed label information and the weight information of the corresponding label, including:

Step S4162, extract the weight information corresponding to the added label code and the weight information corresponding to the reduced label code.

Specifically, the processor extracts the corresponding weight information according to the added label code. The added label code can be understood as the label information of the item newly _placed by the user, and the weight information is summarized and recorded as the weight value M. The corresponding weight information is extracted, the reduced label code can be understood as the label information of the item taken by the user, and the weight information is aggregated and recorded as the weight value M to _{be taken} .

Step S4164, calculating the weight information to obtain the second weight change value.

Specifically, the processor calculates the difference between M _put and M _take , and the difference is the second weight change value M2, that is, M2=M _put - M _take .

In this embodiment, the cabinet counting method further includes:

When it is detected that the cabinet body 20 is opened before the door is opened, the initial weight value of the pressure sensor 40 is obtained.

Specifically, before the initial weighing, if there are items stored in the cabinet 20, the initial weight value of the pressure sensor 40 is obtained; if there is no item in the cabinet 20, the initial weight value of the pressure sensor 40 is regarded as 0. It can be understood that the initial weight value may be the weight value saved after the cabinet door 30 is closed last time.

Correspondingly, in step S200, when monitoring that the cabinet body 20 is closed, the first weight change value of the pressure sensor 40 is obtained, including:

When monitoring that the door of the cabinet 20 is closed, obtain the current stable weight value of the pressure sensor 40;

The first weight change value is obtained according to the current stable weight value and the initial weight value.

Specifically, since the pressure sensor 40 is constantly weighing, when the user performs a pick-and-place operation on the items in the cabinet 20, the weighing result will change after the user puts in or takes out the item with the RFID tag. The change in the weighing result shows continuous oscillation, but the overall weight value is constantly increasing or decreasing, and finally stabilizes within a range, that is, the current weight value at this time is the stable weight value, and the stable weight value obtained by calculation is the same as the initial value. The difference between the weight values is stored as the first weight change value M1.

Correspondingly, in step S800, when the absolute value of the difference is less than the second threshold, counting is performed according to the label information, including:

The current stable weight value of the pressure sensor 40 is saved.

Specifically, when it is determined that the absolute value of the _difference ∣Mdifference∣ is smaller than the second threshold value, the error at this time is within a reasonable range, that is, the weight value of the pressure sensor 40 and the weight value obtained by the RFID read-write module 60 at this time depend on the Therefore, the processor updates the stored first weight change value M1 to the initial weight value of the pressure sensor 40 , and counts accurately according to the tag information of the RFID read-write module 60 .

The cabinet counting method provided by the present application includes acquiring the first weight change value of the pressure sensor 40 when the cabinet body 20 is monitored to be closed; when the absolute value of the first weight change value is greater than the first threshold, controlling the RFID read-write module 60 Scan the label information, and obtain the second weight change value according to the label information; calculate the difference between the first weight change value and the second weight change value; when the absolute value of the difference is less than the second threshold, count according to the label information. The present application adopts the RFID reading and writing module 60 combined with weighing mixed counting, and by verifying the pressure sensor data and the data obtained by the RFID reading and writing module 60, the problem of unreliable results of single counting through RFID is avoided, and the RFID reading and writing is improved. Counting reliability of module 60. In addition, unlike the existing RFID counting, which starts the RFID reading and writing module 60 scanning when the cabinet door is detected to be closed, the weighing data is first obtained when the cabinet door 30 is detected to be closed. When the door is opened, there is indeed a behavior of picking and placing items, that is, after judging that the weight change value of the pressure sensor 40 is greater than the threshold value, then start the RFID reading and writing module 60 to scan, so as to avoid each time the door is closed, even if no items are picked and placed, it will be executed. The RFID reading and writing module 60 scans, which saves equipment resources and avoids counting errors caused by unnecessary repetitive scanning and updating of data.

Embodiment 2

The present application provides a cabinet counting device 10, and the above-mentioned cabinet counting method is applied to the cabinet counting device 10, so as to accurately count the labels inside the cabinet 20.

2 and 3 , in this embodiment, the cabinet counting device 10 includes a cabinet 20 , a cabinet door 30 , a door opening/closing detection module 50 , an RFID reading/writing module 60 , a pressure sensor 40 and a processor. Specifically, the cabinet body 20 and the cabinet door 30 are movably connected, the interior of the cabinet body 20 has a storage cavity for storing items, the storage cavity is used for storing a plurality of items with RIFD labels, and the cabinet door 30 can close the storage cavity or When the storage cavity is opened, the door-opening detection module 50 is disposed on one of the cabinet body 20 or the cabinet door 30, and is connected to the processor in communication. When the door-opening detection module 50 detects that the cabinet door 30 is closed, the door-opening detection module 50 transmits the closed door The signal is sent to the processor, and the processor is connected in communication with the RFID reading and writing module 60, and can control the RFID reading and writing module 60 to start to read the label information of the RFID label in the cabinet 20. The processor is based on the switch state, multiple label information and The weight change value implements the above cabinet counting method to achieve accurate counting. 4 and 5, in this embodiment, the RFID reader/writer module 60 includes an RFID reader/writer 61 and an antenna 62, the RFID reader/writer 61 is communicatively connected to the antenna 62, the antenna 62 is arranged in the storage cavity, and the pressure sensor 40 It is accommodated in the storage cavity and located on the bottom surface of the cabinet 20, and is used for weighing the items placed in the storage cavity. Specifically, when the processor receives the door closing information sent by the door opening and closing detection module 50, the processor controls the RFID reader 61 to start up, and the RFID reader 61 communicates wirelessly with the RFID tag through the antenna 62 to read the RFID tag. Label Information.

3-5, in this embodiment, the RFID reader/writer module 60 includes an RFID reader/writer 61 and multiple antennas 62, and the multiple antennas 62 include a first antenna 621, a second antenna 622 and a third antenna 623, The first antenna 621 is arranged on the bottom surface of the cabinet body 20, the second antenna 622 is arranged on the top surface of the cabinet body 20, and at least one third antenna 623 is arranged on the rear side, left side or right side of the cabinet body 20, wherein the cabinet The body 20 includes a partition plate, which can shield the signal. The partition plate divides the interior of the cabinet 20 into an upper cavity 71 and a lower cavity 72. Both the upper cavity 71 and the lower cavity 72 are used to store the to-be-counted For articles, the first antenna 621 scans the lower cavity 72 , the second antenna 622 scans the upper cavity 71 , and the third antenna 623 can scan both the upper cavity 71 and the lower cavity 72 . Specifically, taking the third antenna 623 disposed on the right side of the cabinet 20 as an example, the third antenna 623 is located on the extension line of the partition plate, so that the third antenna 623 is divided into an upper part 6231 and a lower part 6232, and the upper part 6231 can To scan the upper cavity 71 , the lower part 6232 can scan the lower cavity 72 . It can be understood that there are multiple third antennas 623, wherein at least two third antennas 623 are located in the upper cavity 71 and the lower cavity 72, respectively.

Specifically, the processor can control the RFID reader 61 to start, and the RFID reader 61 drives the first antenna 621, the second antenna 622 and the third antenna 623 to scan the tags of the items to be counted. The controller 61 can drive at least one of the first antenna 621 , the second antenna 622 and the third antenna 623 to scan, so as to flexibly control the antenna 62 to scan a part of the cabinet 20 . Among them, the goods include medicines, consumables and other medical supplies.

3, in this embodiment, the pressure sensor 40 includes a first pressure sensor 41 and a second pressure sensor 42, the first pressure sensor 41 is disposed on the bottom surface of the cabinet body 20, or the side of the partition plate facing the bottom surface, and Being accommodated in the lower cavity 72 , the second pressure sensor 42 is disposed on the top surface of the cabinet 20 or the side of the partition plate facing the top surface, and is accommodated in the upper cavity 71 .

Specifically, in the upper cavity 71, the second pressure sensor 42 is accommodated in the upper cavity 71, and is arranged on the side of the partition plate facing the top surface. At this time, the medicine is placed on the partition plate for weighing. In the lower cavity 72, the arrangement of the first pressure sensor 41 includes two situations. One is that the first pressure sensor 41 is accommodated in the lower cavity 72 and is arranged on the bottom surface of the cabinet 20. At this time, the medicine is placed in the cabinet. 20 bottom to facilitate the weighing of the first pressure sensor 41; secondly, the first pressure sensor 41 can also be applied to hanging weighing, the side of the partition plate facing the bottom surface of the cabinet 20 is provided with a plurality of hanging brackets 80, the first The pressure sensor 41 is disposed on the side of the partition plate facing the top surface. When the hanger 80 hangs consumables with RFID tags, the first pressure sensor 41 can weigh the consumables on the hanger 80 . It can be understood that, a suspension frame can also be arranged in the upper cavity 71, and the specific implementation is similar to the suspension weighing of the lower cavity 72, which is not repeated here.

In this embodiment, the processor is connected in communication with the first pressure sensor 41 and the second pressure sensor 42 respectively. When the processor determines that the first weight change value corresponding to the first pressure sensor 41 or the second pressure sensor 42 is greater than the first threshold At the same time, the processor can control the scanning of the antenna 62 in the corresponding area, so as to save equipment resources and avoid unnecessary repeated scanning and counting errors caused by updating data. Specifically, when the processor determines that the first weight change value of the first pressure sensor 41 is greater than the first threshold, the processor controls the RFID reader to start, and the RFID reader drives the lower parts 6233 of the first antenna 621 and the third antenna 623 Scan the items in the lower cavity 72, when the upper processor determines that the first weight change value of the second pressure sensor 42 is greater than the first threshold, the processor controls the RFID reader to start, and the RFID reader drives the second antenna 622 and the first The upper part 6231 of the three antennas 623 scans the items in the upper cavity 71 .

The cabinet counting device provided by the present application uses the above-mentioned cabinet counting method to count, and when the cabinet 20 is monitored to close the door, the first weight change value of the pressure sensor 40 is obtained; when the absolute value of the first weight change value is greater than the first weight change value At the threshold, control the RFID read-write module 60 to scan the label information, and obtain the second weight change value according to the changed label information obtained by scanning and the corresponding weight values of different preset label information; calculate the first weight change value and the second weight change value. The difference between the weight change values; when the absolute value of the difference is less than the second threshold, count according to the label information obtained by scanning. The present application adopts the RFID reading and writing module 60 combined with weighing mixed counting, and by verifying the data of the pressure sensor 40 and the data obtained by the RFID reading and writing module 60, the problem of unreliable results of single counting by RFID is avoided, and the RFID reading is improved. Count reliability of write module 60.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can also be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of this application should be determined by the appended claims.

Claims (10)

1. a cabinet counting method, is characterized in that, comprises RFID read-write module and pressure sensor, and described method comprises: When it is detected that the cabinet body is closed, the first weight change value of the pressure sensor is obtained; When the absolute value of the first weight change value is greater than the first threshold value, control the RFID read-write module to scan the label information, and obtain the weight value corresponding to the changed label information obtained by scanning and the preset different label information. the second weight change value; calculating the difference between the first weight change value and the second weight change value; When the absolute value of the difference is smaller than the second threshold, counting is performed according to the label information obtained by scanning. 2 . The cabinet counting method according to claim 1 , wherein the cabinet includes a plurality of items to be counted, each of the items to be counted includes corresponding label information, and each label information includes a corresponding to-be-counted item. 3 . weight information of the item, the method further comprising: pre-store the label information of the plurality of items to be counted; The initial weight values of the multiple items to be counted are acquired according to pre-stored label information and corresponding weight information of the multiple items to be counted. 3 . The cabinet counting method according to claim 2 , wherein the control of the RFID reader/writer to scan the label information, and the weight corresponding to the changed label information obtained by scanning and the preset different label information value to obtain the second weight change value including: Obtain the tag information scanned by the RFID read-write module; Obtaining changed label information according to the scanned label information and pre-stored label information of the plurality of items to be counted; The second weight change value is obtained according to the changed label information and the weight information of the corresponding label. 4 . The cabinet counting method according to claim 2 , wherein the control of the RFID read-write module to scan the label information, and the weight corresponding to the changed label information obtained by scanning and the preset different label information value to obtain the second weight change value including: Obtain the tag information scanned by the RFID read-write module; Obtain the current weight value according to the scanned label information and the weight information of the corresponding label; According to the current weight value and the initial weight value to the second weight change value. 5. The cabinet counting method according to claim 3 or 4, wherein the RFID read-write module comprises an RFID reader-writer, a first antenna, a second antenna and a third antenna, and the first antenna is provided with On the bottom surface of the cabinet, the second antenna is arranged on the top surface of the cabinet, and at least one of the third antennas is arranged on the rear side, the left side or the right side of the cabinet; the The cabinet body includes a partition plate, the pressure sensor includes a first pressure sensor and a second pressure sensor, the first pressure sensor is arranged on the bottom surface of the cabinet body, or the side of the partition plate facing the bottom surface , the second pressure sensor is arranged on the top surface of the cabinet, or the side of the partition plate facing the top surface, and the method further includes: Obtain the initial weight value of the first pressure sensor or the second pressure sensor before monitoring the door of the cabinet; Correspondingly, the acquiring the first weight change value of the pressure sensor when monitoring that the cabinet body is closed includes: When it is detected that the cabinet body is closed, the current weight value of the first pressure sensor or the second pressure sensor is obtained; Obtain the first weight change value according to the difference between the current weight value and the initial weight value corresponding to the first pressure sensor or the second pressure sensor; Correspondingly, when the absolute value of the first weight change value is greater than the first threshold, controlling the RFID read-write module to scan the tag information includes: When the absolute value of the first weight change value corresponding to the first pressure sensor is greater than the first threshold, the RFID reader/writer is controlled to start, and the RFID reader/writer drives the first antenna or the third antenna scanning; When the absolute value of the first weight change value corresponding to the second pressure sensor is greater than the first threshold, the RFID reader/writer is controlled to start, and the RFID reader/writer drives the second antenna or the third antenna scanning; When the absolute value of the first weight change value corresponding to the first pressure sensor and the second pressure sensor is greater than the first threshold at the same time, the RFID reader/writer is controlled to start, and the RFID reader/writer drives the The first antenna, the second antenna and the third antenna are scanned. 6 . The cabinet counting method according to claim 5 , further comprising a database, wherein the database is connected in communication with the RFID reader, and the database is used to pre-store the data of the plurality of items to be counted. 7 . Label information, the label information further includes a label code, and the changed label information obtained according to the scanned label information and pre-stored label information of the plurality of items to be counted includes: uploading the scanned tag information to the database; Comparing the label code corresponding to the scanned label information with the label code corresponding to the label information of the pre-stored items to be counted to obtain the changed label information, wherein the changed label information includes the added label codes and reduced said label codes; Correspondingly, obtaining the second weight change value according to the changed label information and the weight information of the corresponding label includes: Extracting the weight information corresponding to the increased label code and the weight information corresponding to the decreased label code; The second weight change value is obtained by calculating the weight information. 7. The cabinet counting method according to claim 1, wherein the method further comprises: The first pre-value is half of the weight of the smallest item in pre-storage; The second predetermined value is the maximum error value of the minimum item weight to be counted. 8. The cabinet counting method according to claim 1, characterized in that, further comprising: Obtain the initial weight value of the pressure sensor before monitoring the door of the cabinet; Correspondingly, the acquiring the first weight change value of the pressure sensor includes: When it is detected that the cabinet body is closed, the current stable weight value of the pressure sensor is obtained; Obtaining the first weight change value according to the current stable weight value and the initial weight value; Correspondingly, when the absolute value of the difference is less than the second pre-value, counting according to the label information obtained by scanning, including: Save the current stable weight value of the pressure sensor. 9. A cabinet counting device, characterized in that, comprising: The cabinet is used to store multiple label information; a cabinet door, movably connected with the cabinet body; The door switch detection module is used to detect the switch state of the cabinet door; RFID read-write module for scanning a plurality of the tag information; a pressure sensor, arranged on the bottom surface of the cabinet, and a plurality of the label information is placed on the pressure sensor for measuring the weight change value of the plurality of label information; The processor is configured to execute the cabinet counting method according to any one of claims 1-8 according to the switch state, a plurality of the label information and the weight change value, so as to realize counting. 10 . The cabinet counting device according to claim 9 , wherein the RFID reader/writer module comprises an RFID reader/writer, a first antenna, a second antenna and a third antenna, and the first antenna is provided at the the bottom surface of the cabinet body, the second antenna is arranged on the top surface of the cabinet body, at least one of the third antennas is arranged on the rear side, left side or right side of the cabinet body, the RFID reader The writer can drive the first antenna, the second antenna and the third antenna to scan the label information; the cabinet includes a partition plate, and the pressure sensor includes a first pressure sensor and a second pressure sensor , the first pressure sensor is arranged on the bottom surface of the cabinet, or the side of the partition plate facing the bottom surface, and the second pressure sensor is arranged on the top surface of the cabinet, or the partition The baffle faces the side of the top surface.

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