CN106446976A - Label position determining system, method, and device and light label - Google Patents

Abstract

The present invention provides a tag position determination system, method, device, and optical tag, wherein the system includes: an optical tag 22, which is set on an item and is used to receive an inquiry instruction sent by an optical tag reading and writing device 24 through downlink light And/or send the label information of the optical label to the optical label reading and writing device through the upstream light, and the query instruction is used to instruct the optical label to report the label information, and the label information is used to determine the position of the optical label; one or more optical labels The read-write device 24 is configured to send an inquiry instruction to the above-mentioned optical tag 22 through downlink light and/or receive label information sent by the optical tag 22 through uplink light. The present invention solves the problems in the related art that when using RFID tags to locate items, the positioning accuracy is easily affected by the environment and the positioning efficiency is low, thereby achieving the effect of improving the positioning accuracy of items and improving the positioning efficiency.

Description

Label position determination system, method, device and optical label

technical field

The present invention relates to the field of optical communication, in particular to a label position determining system, method, device and optical label.

Background technique

With the rapid development of the Internet of Things and the substantial increase in productivity in modern society, products and services have greatly enriched people's lives, and various labels have played an increasingly important role in people's lives. Among them, the label can be applied to the item counting technology in logistics. With the development of science and technology, people put forward the demand for fast and convenient logistics counting and positioning in the field of circulation, which requires a fast, convenient, accurate and low-cost Cost-effective label recognition technology, considering the requirements of energy saving and environmental protection, label editability has also become a basic requirement. At present, the tag identification technology that can meet the above requirements is radio frequency identification (Radio Frequency Identification, referred to as RFID) technology, which has the characteristics of non-contact, passive tag and editable tag identification (Identification, referred to as ID) information. It can be used for indoor positioning. For details, refer to FIG. 1 , which is a basic structure diagram of RFID tag indoor positioning in the related art. Since it adopts the received signal strength indication (Received Signal Strength Indication, referred to as RSSI) strength positioning method, in order to improve the positioning accuracy, it first needs to install several positioning reference tags, and requires multiple read-write heads at the same time. In order to accurately locate the required RFID. Therefore, its positioning process is extremely complicated, and it is affected by other objects in the room on the electromagnetic field, that is, after the indoor items move, the parameters of the original calculation model need to be recalibrated to ensure the accuracy of its positioning. At the same time, because it uses radio frequency for transmission, Therefore, it will also have some weaknesses of radio frequency, such as: sensitive to electromagnetic radiation fields and metal devices, and cannot work normally. At the same time, RFID tags cannot be too small due to the antenna, so the work of RFID tags in many places is limited. . Therefore, there are problems in the related art that when using RFID tags to locate items, the positioning accuracy is easily affected by the environment and the positioning efficiency is low.

Aiming at the problems existing in related technologies that when using RFID tags to locate items, the positioning accuracy is easily affected by the environment and the positioning efficiency is low, no effective solution has been proposed yet.

Contents of the invention

The present invention provides a tag position determination system, method, device and optical tag to at least solve the problems in the related art that when using RFID tags to locate items, the positioning accuracy is easily affected by the environment and the positioning efficiency is low.

According to one aspect of the present invention, a tag position determination system is provided, including: an optical tag, set on an item, used to receive an inquiry instruction sent by an optical tag reading and writing device through downlink light and/or send all the information through uplink light The label information of the optical label is sent to the optical label reading and writing device, the inquiry instruction is used to instruct the optical label to report label information, and the label information is used to determine the position of the optical label; one or more optical labels The read-write device is configured to send the inquiry instruction to the optical tag through the downlink light and/or receive the tag information sent by the optical tag through the uplink light.

Optionally, the optical tag includes: a photocell, configured to receive downlink light and convert the downlink light into electrical energy and/or receive the query instruction; a power management module, configured to perform at least one of the following operations: store The electric energy supplies power to the light transmitter and the micro-control processor; the light transmitter is used to send the label information through the uplink light; the memory is used to store the label information; the micro-control processor is used to performing at least one of the following operations: controlling the photovoltaic cell to receive the downlink light, controlling the photovoltaic cell to receive the inquiry command, controlling the power management module to supply power to the optical transmitter, controlling the optical transmitter to send The tag information and the control memory store and compare the tag information.

Optionally, the optical tag reading and writing device includes: a photodetector for receiving the tag information; a light emitting diode (LED) for emitting downlink light and/or sending the inquiry instruction; a control chip for executing At least one of the following operations: controlling the LED to emit the downlink light, controlling the LED to send the query instruction, and processing the tag information.

Optionally, the system further includes: a calculation device, configured to calculate the position of the optical tag at least according to the tag information.

According to another aspect of the present invention, a tag position determination method is provided, including: sending an inquiry command to the optical tag through downlink light to instruct the optical tag to report tag information; The tag information reported by the query command through the uplink light; at least determine the position of the optical tag according to the tag information.

Optionally, after determining the position information of the optical tag at least according to the tag information, at least one of the following is further included: saving the position information of the optical tag; sending the position information of the optical tag to the the optical tag; using the position information of the optical tag and the pre-saved position information of the optical tag to determine the movement information of the optical tag.

Optionally, determining the position of the optical tag at least according to the optical tag information includes: sending the tag information to a computing device for calculating the position of the optical tag; using the computing device at least according to the tag information identifying the position of the light tag.

Optionally, the tag information includes at least one of the following: identification ID information of the optical tag, time when the optical tag sends the tag information; and/or, at least according to the tag information to determine the optical The location information of the tag includes: determining the location of the optical tag according to the tag information and at least one of the following information: time of receiving the tag information, and signal strength when receiving the tag information.

According to another aspect of the present invention, a method for determining the position of a tag is provided, which includes: receiving an inquiry command sent downlink by an optical tag reading and writing device for determining the position of the optical tag, wherein the query The query instruction is used to instruct the optical tag to report tag information, and the tag information is used to determine the position of the optical tag; according to the query instruction, the tag information is sent to the optical tag reading and writing device.

Optionally, after sending the tag information to the optical tag reading and writing device according to the inquiry instruction, the method further includes: receiving the position information of the optical tag sent by the optical tag reading and writing device.

Optionally, the tag information includes at least one of the following: identification ID information of the optical tag, and time when the tag information is sent.

According to another aspect of the present invention, a tag position determination device is provided, including: a first sending module, configured to send an inquiry command to an optical tag through downlink light to instruct the optical tag to report tag information; the first A receiving module, configured to receive the tag information reported by the optical tag through uplink light according to the inquiry instruction; a first determining module, configured to determine the position of the optical tag at least according to the tag information.

Optionally, the device further includes at least one of the following: a saving module, configured to save information about the location of the optical tag; a second sending module, configured to send information about the location of the optical tag to the optical tag a tag; a second determining module, configured to determine the movement information of the optical tag by using the position information of the optical tag and the pre-saved position information of the optical tag.

Optionally, the first determining module includes: a sending unit, configured to send the tag information to a computing device used to calculate the position of the optical tag; a determining unit, configured to use the computing device at least according to the Determine the position of the optical tag based on the tag information.

Optionally, the tag information includes at least one of the following: identification ID information of the optical tag, time when the optical tag sends the tag information; and/or, the first determination module includes: according to the The position of the optical tag is determined by at least one of the tag information and the following information: the time when the tag information is received, and the signal strength when the tag information is received.

According to another aspect of the present invention, an optical label reading and writing device is provided, including the device described in any one of the above.

According to another aspect of the present invention, a tag position determination device is provided, including: a second receiving module, configured to receive an inquiry instruction sent by an optical tag reading and writing device for determining the position of an optical tag through downlink light, wherein , the query instruction is used to instruct the optical tag to report tag information, and the tag information is used to determine the position of the optical tag; a third sending module is used to send the tag information to the optical tag according to the query instruction Read and write devices for optical tags.

Optionally, the device further includes: a third receiving module, configured to receive the position information of the optical tag sent by the optical tag reading and writing device.

Optionally, the tag information includes at least one of the following: identification ID information of the optical tag, and time when the tag information is sent.

According to another aspect of the present invention, an optical label is provided, including the device described in any one of the above.

According to the present invention, by adopting the label position determination system, it includes: an optical label, which is arranged on the article, and is used to receive the query instruction sent by the optical label reading and writing device through the downlink light and/or to send the label of the light label through the uplink light The information is sent to the optical label reading and writing device, and the query instruction is used to instruct the optical label to report label information, and the label information is used to determine the position of the optical label; one or more optical label reading and writing devices use Based on sending the query instruction to the optical tag through the downlink light and/or receiving the tag information sent by the optical tag through the uplink light, the problem of using RFID tags to locate items in the related art is solved. In this case, the positioning accuracy is easily affected by the environment and the positioning efficiency is low, so as to achieve the effect of improving the positioning accuracy of the item and improving the positioning efficiency.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a basic structural diagram of RFID tag indoor positioning in the related art;

Fig. 2 is a structural block diagram of a tag position determining system according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of the optical tag 22 in the tag position determining system according to an embodiment of the present invention;

FIG. 4 is a structural frame of the optical tag reading and writing device 24 in the tag position determining system according to an embodiment of the present invention;

Fig. 5 is a preferred structural block diagram of a tag position determining system according to an embodiment of the present invention;

FIG. 6 is a flow chart of a first method for determining a tag position according to an embodiment of the present invention;

7 is a flowchart of a second method for determining a tag position according to an embodiment of the present invention;

Fig. 8 is a structural block diagram of a first tag position determination device according to an embodiment of the present invention;

Fig. 9 is a preferred structural block diagram of a first tag position determining device according to an embodiment of the present invention;

FIG. 10 is a structural block diagram of the first determining module 86 in the first tag position determining device according to an embodiment of the present invention;

Fig. 11 is a structural block diagram of an optical tag reading and writing device according to an embodiment of the present invention;

Fig. 12 is a structural block diagram of a second tag position determining device according to an embodiment of the present invention;

Fig. 13 is a preferred structural block diagram of a second tag position determining device according to an embodiment of the present invention;

Fig. 14 is a structural block diagram of an optical tag according to an embodiment of the present invention;

Fig. 15 is a structural diagram of an optical tag according to an embodiment of the present invention;

Fig. 16 is a structural block diagram of an LED-VLC according to an embodiment of the present invention;

Fig. 17 is a basic structural diagram of indoor positioning according to an embodiment of the present invention;

Fig. 18 is a schematic triangular diagram of indoor positioning according to an embodiment of the present invention;

Fig. 19 is an overall structural diagram of indoor positioning according to an embodiment of the present invention;

Fig. 20 is a flowchart of indoor positioning according to an embodiment of the present invention.

detailed description

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence.

Fig. 2 is a structural block diagram of a tag position determining system according to an embodiment of the present invention. As shown in Fig. 2 , the system includes an optical tag, one or more optical tag reading and writing devices, wherein the optical tag and the optical tag reading and writing device Communication is carried out through optical wireless communication. When the optical tag interacts with the optical tag reading and writing device, it can communicate by sending optical signals. When there are multiple optical label reading and writing devices, these optical label reading and writing devices can be located in different control positions, and when the number of optical label reading and writing devices is more, the positioning of the optical label is more accurate. FIG. 2 takes three optical tag reading and writing devices as an example for illustration.

The optical tag 22 is arranged on the article, and is used to receive the query instruction sent by the optical tag reading and writing device 24 through the downlink light and/or send the label information of the optical tag to the optical tag reading and writing device through the uplink light. It is used to instruct the optical tag to report tag information, which is used to determine the position of the optical tag; one or more optical tag reading and writing devices 24 are used to send inquiry instructions to the above-mentioned optical tag 22 through downlink light and/or receive light The tag 22 sends tag information through uplink light. In this embodiment, the tag information may include identification (Identification, ID for short) information of the optical tag and/or the time when the optical tag 22 sends the optical tag information. The optical tag 22 can be located on an item, and the item can be an item to be positioned. By determining the position of the optical tag 22, the position of the item can be determined, thereby realizing the positioning of the item. Moreover, the optical tag 22 is passive, and can supply power to itself through external light, and when the optical tag 22 receives and sends data, it is less affected by the outside world, even if the surrounding objects are moved, there will be no impact on the optical tag. 22 Receive and send data to have an impact, and the working environment is not limited. Therefore, the problems in the related art that the positioning accuracy is easily affected by the environment and the positioning efficiency is low when the RFID tags are used to locate the items are solved, thereby achieving the effect of improving the positioning accuracy of the items and improving the positioning efficiency.

The application of the above-mentioned optical label can be a new type of non-contact passive photoelectric label identification, referred to as Optoelectronic Identification (OEID for short), using this photoelectric identification technology combined with Visible Light communication (Visible Light communication, referred to as The method of VLC) can realize the purpose of indoor positioning of the object where the OEID tag (abbreviated as optical tag) is located.

Fig. 3 is a structural block diagram of an optical tag 22 in a tag position determining system according to an embodiment of the present invention. As shown in Fig. The processor 310, the optical tag will be described below.

The photoelectric cell 32 is used to receive the downlink light and convert the downlink light into electrical energy and/or receive the above-mentioned inquiry instruction; the power management module 34 is used to perform at least one of the following operations: store the above-mentioned electric energy, supply power to the light transmitter 36, Power supply to micro-control processor 310; Light transmitter 36 is used to send tag information by uplink light; Memory 38 is used to store tag information; Micro-control processor 310 is used to perform at least one of the following operations: control photocell 32 to receive Downlink light, control the photocell 32 to receive the query command, control the power management module 34 to supply power to the light transmitter 36, control the light transmitter 36 to send the above tag information, and control the memory 38 to store and compare the tag information. Wherein, the above-mentioned photocell 32 can be used to receive the position information of the light tag sent by the micro-control processor. The connection relationship of the above-mentioned parts can be multiple, for example, the photoelectric cell 32 is connected to the above-mentioned microcontroller processor 310, the power management module 34 is connected to the photocell 32 and for the control processor 310, the light transmitter 36 can be connected to the microcontroller processor 310 , the memory 38 may also be connected to the microcontroller processor 310 . The connection relationship shown in FIG. 3 is only an example, and other connection relationships may also be used.

Fig. 4 is the structural block diagram of the optical label read-write device 24 in the label position determination system according to the embodiment of the present invention, as shown in Fig. , referred to as LED) 44 and control chip 46, the optical tag reading and writing device 24 will be described below.

The light detector 42 is used to receive label information; the light emitting diode LED44 is used to emit downlink light and/or send an inquiry instruction; the control chip 46 is used to perform at least one of the following operations: control the LED to emit downlink light, control the LED to send Query instructions and process label information. Wherein, besides being used for emitting light and sending inquiry instructions, the LED44 can also send the calculated position information of the light tag to the light tag. The connection relationship of the above-mentioned parts can be various, for example, the photodetector 42 can be connected to the control chip 46, the LED44 can be connected to the control chip 46, and the photodetector 42 and the LED44 can be connected or not. FIG. 4 takes no connection between the light detector 42 and the LED 44 as an example.

Fig. 5 is a preferred structural block diagram of a tag position determining system according to an embodiment of the present invention. As shown in Fig. 5, the system includes not only the optical tag 22 shown in Fig. 2 and one or more optical tag reading and writing devices 24, but also A computing device 52 may be included, the system being described below.

The computing device 52 is configured to calculate the position of the optical tag at least according to the tag information. Wherein, the computing device 52 may also determine the movement information of the optical tag according to the position information of the optical tag and the pre-saved position information of the optical tag. The computing device 52 can be connected with the optical tag reading and writing device 24, and calculate the position of the optical tag by receiving the tag information reported by the optical tag reading and writing device 24. The computing device 52 can be a computer or other intelligent terminal. The computing device 52 can also be arranged inside the optical label reading and writing device 24 . FIG. 5 takes the connection between the computing device 52 and the optical label reading and writing device 24 as an example.

Fig. 6 is a flowchart of a first method for determining a tag position according to an embodiment of the present invention. As shown in Fig. 6, the method includes the following steps:

Step S602, sending an inquiry instruction for instructing the optical tag to report tag information to the optical tag through downlink light;

Step S604, receiving the tag information reported by the optical tag through the uplink light according to the query instruction;

Step S606, determining the position of the optical tag at least according to the tag information.

Through the above steps, the position of the optical tag is determined by using the tag information reported by the optical tag (same as the above-mentioned optical tag 22), and the optical tag can be located on the item to be positioned, so that the positioning of the item can be realized. Among them, the optical tag can be passive, and can be powered by external light, and when the optical tag receives and sends data, it is less affected by the outside world, even if the surrounding objects are moved, the optical tag will not be affected. Receive and send data to impact, work in unlimited environments. Therefore, the problems in the related art that the positioning accuracy is easily affected by the environment and the positioning efficiency is low when the RFID tags are used to locate the items are solved, thereby achieving the effect of improving the positioning accuracy of the items and improving the positioning efficiency.

In an optional embodiment, after determining the position information of the optical tag at least according to the tag information, at least one of the following may be included: saving the position information of the optical tag; sending the position information of the optical tag to the optical tag; The movement information of the optical tag is determined by using the position information of the optical tag and the pre-saved position information of the optical tag. Wherein, when the information of the position of the optical tag is sent to the optical tag, since the storage control of the optical tag is limited, the general information of the position of the optical tag (for example, the room number) can be sent to the optical tag.

In an optional embodiment, determining the position of the optical tag at least according to the optical tag information includes: sending the tag information to a computing device for calculating the position of the optical tag; using the computing device to determine the position of the optical tag at least according to the tag information . Wherein, the computing device may be a computer or other intelligent terminals.

In an optional embodiment, the above tag information may include at least one of the following: the identification ID information of the optical tag, the time when the optical tag sends the tag information; and/or, determining the location information of the optical tag at least according to the tag information includes : Determine the position of the optical tag according to the tag information and at least one of the following information: the time of receiving the tag information, and the signal strength when receiving the tag information.

FIG. 7 is a flow chart of a second method for determining a tag position according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:

Step S702, receiving an inquiry instruction sent by the optical label reading and writing device for determining the position of the optical label through downlink light, wherein the inquiry instruction is used to instruct the optical label to report label information, and the label information is used to determine the location of the optical label. Location;

Step S704, sending the tag information to the optical tag reading and writing device according to the above inquiry command.

In the above embodiment, it may be the optical tag that receives the optical tag reading and writing device (same as the above optical tag reading and writing device 24) to inquire about the instruction and sends the tag information, so that the position of the optical tag can be determined according to the tag information reported by the optical tag , and, the optical tag can be located on the item to be positioned, so that the positioning of the item can be realized. Among them, the optical tag can be passive, and can be powered by external light, and when the optical tag receives and sends data, it is less affected by the outside world, even if the surrounding objects are moved, the optical tag will not be affected. Receive and send data to impact, work in unlimited environments. Therefore, the problems in the related art that the positioning accuracy is easily affected by the environment and the positioning efficiency is low when the RFID tags are used to locate the items are solved, thereby achieving the effect of improving the positioning accuracy of the items and improving the positioning efficiency.

In an optional embodiment, after sending the tag information to the optical tag reading and writing device according to the above inquiry instruction, the method further includes: receiving the position information of the optical tag sent by the optical tag reading and writing device.

Optionally, the tag information includes at least one of the following: identification ID information of the optical tag, and time when the tag information is sent.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to enable a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

In this embodiment, a device for determining a tag position is also provided, which is used to implement the above embodiments and preferred implementation modes, and what has been described will not be repeated here. As used below, the term "module" may be a combination of software and/or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 8 is a structural block diagram of a first tag position determination device according to an embodiment of the present invention, as shown in Fig. photodetector 42) and the first determining module 86 (same as the computing device 52 mentioned above), the device will be described below.

The first sending module 82 is used to send an inquiry instruction for instructing the optical tag to report label information to the optical tag through the downlink light; the first receiving module 84 is connected to the above-mentioned first sending module 82 and is used to receive The tag information reported by the query command through the uplink light; the first determining module 86 is connected to the above-mentioned first receiving module 84, and is used to determine the position of the optical tag at least according to the tag information.

Fig. 9 is a preferred structural block diagram of a first tag position determination device according to an embodiment of the present invention. As shown in Fig. 9, in addition to all the modules shown in Fig. 8, the device also includes at least one of the following modules:

The storage module 92 is connected to the above-mentioned first determination module 86, and is used to save the information of the position of the light label; the second sending module 94 (same as the above-mentioned LED44), is connected to the above-mentioned first determination module 86, and is used to store the position of the light label. The information of the position is sent to the optical label; the second determination module 96 (the same as the above-mentioned computing device 52), connected to the above-mentioned first determination module 86, is used to use the information of the position of the optical label and the position of the optical label stored in advance The information determines the movement information of the light tag.

Fig. 10 is a structural block diagram of the first determining module 86 in the first tag position determining device according to an embodiment of the present invention. As shown in Fig. 10, the first determining module 86 includes a sending unit 102 and a determining unit 104, the following The first determination module 86 is described.

The sending unit 102 is used to send the tag information to the computing device used to calculate the position of the optical tag (same as the computing device 52 mentioned above); the determining unit 104 is connected to the sending unit 102 and is used to use the computing device at least according to the tag The information determines the position of the light tag.

In an optional embodiment, the above tag information may include at least one of the following: the identification ID information of the optical tag, the time when the optical tag sends the tag information; and/or, the first determination module 86 includes: and at least one of the following information to determine the position of the optical tag: the time when the tag information is received, and the signal strength when the tag information is received.

FIG. 11 is a structural block diagram of an optical tag reading and writing device according to an embodiment of the present invention. As shown in FIG. 11 , the optical tag reading and writing device 112 includes any one of the first tag position determining devices 114 described above.

Fig. 12 is a structural block diagram of a second tag position determining device according to an embodiment of the present invention. As shown in Fig. 12 , the device includes a second receiving module 122 (same as the above photocell 32), a third sending module 124 (same as above-mentioned light emitter 36), the device will be described below.

The second receiving module 122 is used to receive an inquiry instruction sent by the optical label reading and writing device for determining the position of the optical label through downlink light, wherein the inquiry instruction is used to instruct the optical label to report label information, and the label information is used To determine the position of the optical tag; the third sending module 124 is connected to the second receiving module 122 and is used to send the tag information to the optical tag reading and writing device according to the inquiry command.

Fig. 13 is a preferred structural block diagram of a second tag position determining device according to an embodiment of the present invention. As shown in Fig. 13, the device includes a third receiving module 132 (same as above) in addition to all modules shown in Fig. 12 Photocell 32), the device will be described below.

The third receiving module 132 is connected to the above-mentioned third sending module 124, and is used for receiving the position information of the optical tag sent by the optical tag reading and writing device.

In an optional embodiment, the tag information includes at least one of the following: identification ID information of the optical tag, and time when the tag information is sent.

FIG. 14 is a structural block diagram of an optical tag according to an embodiment of the present invention. As shown in FIG. 14 , the optical tag 142 includes any one of the above-mentioned second tag position determination devices 144 .

The optical tag in the above embodiment is passive in itself, and converts external light into electricity through its built-in photocell to supply power to it. It can emit light signals, and can also accept external light signal instructions. Its basic structure is shown in Figure 15. FIG. 15 is a structural diagram of an optical tag according to an embodiment of the present invention. The workflow of the optical tag will be described below in conjunction with FIG. 15:

First, the photocell (corresponding to the photovoltaic cell receiver in Figure 15) converts the received light into electricity to the power management module, and the power management module stores the electric energy on its built-in capacitor, and supplies it to the light transmitter (corresponding to Figure 15 LED in), and the microcontroller processor (corresponding to the signal processing and controller in Figure 15) power supply. The microcontroller manager converts the photocell into a photoreceiver state through the power management module, which is used to receive the light signal of the external read-write head. Then the microcontroller manager controls the power management module to supply power to the optical transmitter, and at the same time instructs the optical transmitter to transmit a corresponding uplink optical signal. The OEID label is placed on the object to be identified.

The indoor LED light has a built-in optical receiver, which can be used as a read-write head for OEID (same as the above-mentioned optical tag read-write device). It charges the OEID tag by emitting light through the LED, and can also send instructions to the OEID tag, and can also receive the information of the OEID. For details, please refer to FIG. 16, which is a structural block diagram of the LED-VLC according to the embodiment of the present invention.

The present invention will be described below in conjunction with FIGS. 15 and 16 .

In an optional embodiment, the system for locating the position of the specified item consists of three (three are in order to improve the positioning accuracy, it can also be two or even one) or more OEID read-write heads of LED-VLC, And one or more OEID labels, OEID labels are placed on the designated items. See FIG. 17 , which is a basic structural diagram of indoor positioning according to an embodiment of the present invention. Firstly, the tagged objects are placed in a room with LED-VLC, and there are at least three LED lights in the room, and these lights are connected with the monitoring computer or external network through power lines. The working process is as follows. First, turn on the LED light to charge the OEID tag, and then send a downlink command to the OEID according to the Point to Multiple Point (P2MP) protocol, so that only one OEID tag can send an uplink reply at a time. Each LED-VLC lamp received the reply signal from the OEID tag almost at the same time, the distance between the OEID tag and each LED lamp can be estimated by means of TDOA (a method of positioning using time difference), and these values are controlled by programmable logic Programmable Logic Controller (PLC for short) to the monitoring computer (or other devices that can perform calculations), or remotely control the computer, and then the computer calculates the OEID label through the method of triangulation, as shown in Figure 18. , wherein, FIG. 18 is a schematic triangular diagram of indoor positioning according to an embodiment of the present invention. If there are multiple OEID tags, the above process will be repeated, and the computer will record all items with OEID tags in the room. Every time the light is turned on, the above procedures will be repeated, and the records will be recorded. At the same time, the monitoring computer will compare the original records, so that it can be judged whether the item has been moved.

In the embodiment of the present invention, the communication system formed between the passive OEID tag and the LED-VLC lamp is used to accurately locate the indoor OEID tag through common indoor positioning methods and algorithms. This is a supplement to the original indoor inventory system.

The method of the present invention will be described in further detail below in conjunction with accompanying drawing:

Refer to the overall technical solution diagram of the present invention shown in FIG. 17 . In a confined space, there are at least 3 LED lights with VLC function, and several OEID labels, or items with OEID labels. These LED-VLC lights are connected with the monitoring computer through the power line, or connected with the router and the external network. Turn on the LED light to make wireless VLC between it and the OEID tag, obtain the data and transfer it to the background to calculate the position of the OEID tag according to the indoor positioning algorithm.

Refer to FIG. 18 for a schematic triangular diagram of indoor positioning according to an embodiment of the present invention. Among them, A, B, and C are the positions of the known LED lights. And D is the position of the OEID label to be tested. As long as the distances of DA, DB, and DC are measured by means of TOA or TDOA, and then according to the principle of triangulation, the position of the point D to be tested can be estimated. Of course, the more LED lights, Measuring the position of D will be more accurate. For example, if there are more than N LED lights, DA, DB, ..., DN will be measured, and there are only three unknowns (xd, yd, zd), and a more accurate measurement of the point D to be measured can be obtained by the method of least squares. Location.

Refer to FIG. 15 for a basic structure diagram of an OEID tag according to an embodiment of the present invention. It is composed of three modules, the PVD photovoltaic cell receiver, its main function is to convert light into electricity, and receive pulsed light data signals to convert electrical signals; secondly, the LED is the light transmitter of the label, and its main function is to convert the label The information is sent to the read-write head; the last is the OEID chip, which is composed of three units, namely the control management unit, the power management unit and the ID-information storage unit. The control management unit is the core, which manages data information and power management. The main purpose of the unit is to effectively manage the power of PVD, and at the same time provide effective power supply to the entire tag. The ID-information storage unit mainly stores the ID information of the tag.

Referring to the structure diagram of the LED-VLC read-write head according to the embodiment of the present invention shown in FIG. 16, its main purpose is to change the LED lamp into an OEID read-write head with VLC function. PD or CCD) is used to receive the uplink optical signal emitted by the OEID tag, and a control chip is used to control the LED lamp to emit the downlink signal and process the data.

Among them, the accuracy of indoor object positioning depends on how many LED lights are involved. Generally, if there is only one LED light, the positioning accuracy is generally about one meter. If there are multiple LED lights involved, it is best to have three or more. The method of triangulation positioning can be used, as shown in Figure 18, the positioning accuracy depends on the algorithm used, such as: TOAD, RSSI, etc., or multiple algorithms are used together. Its basic workflow is shown in Figure 20. First, turn on the LED-VLC light to charge the OEID label. Multiple lights can be turned on together. Then the LED light sends an instruction to start reporting the corresponding OEID. The OEID label follows the P2MP process one by one. Report your own ID information, and the LED lights will check the information and store the ID information. Start the positioning process for each OEID, first select the OEID label of ID1, and ask it to report the ID information, multiple LED-VLC lights receive the information of the ID1 at the same time, and then the time, intensity, etc. It is transferred to the monitoring computer through the PLC, and the computer starts the positioning algorithm to process the received data, thereby calculating the position information of the OEID label of ID1, which can be stored in the computer, or the simplified information can be passed through LED-VLC sends back the OEID tag to ID1, so that the OEID tag will store its own ID information and corresponding location information. Of course, the location information sent to the tag can be simplified as the number of the room. The main consideration here is that the storage of the OEID tag is limited, and the specific location information needs to be matched with the indoor map. If the OEID stores detailed location information, if it is transported to other places , the read-write head does not have a corresponding indoor map, and it is impossible to restore the location information, so the simplified location information is enough. The specific location information in the room can be stored in the monitoring computer for later inspection or review. According to the above process, the OEID tag of ID2, the OEID tag of ID3, ..., the OEID tag of IDn can be positioned one by one, until all the OEID tags in the room are positioned.

Fig. 19 is an overall structural diagram of indoor positioning according to an embodiment of the present invention. As shown in Figure 19, in a closed room, there are multiple objects with OEID labels, such as: filing cabinets, safes, computers, valuables, etc. After these items are placed in the room, through the method of the present invention Inventory and locate these items. The specific workflow is shown in Figure 20, which is a flow chart of indoor positioning according to an embodiment of the present invention, as shown in Figure 20, the process includes the following steps:

Step S2002. First, the LED-VLC lamp receives an instruction from the network management or control center to read and write the OEID tag (the OEID tag can be referred to as a tag for short), and the control chip starts the process of reading and writing. First, it starts to charge the optical tag, and then starts to execute The test steps are as follows.

In step S2004, the LED light sends a P2MP query command to the tag.

Step S2006, after the tag receives the information, it sends reply commands to the LED-VLC one by one according to the P2MP process, that is, ID information and status.

Step S2008, after the LED light receives the information, it starts the positioning process, that is, it sends an instruction to the ID1 tag, requesting it to reply the ID information and the launch time.

Step S2010, after the tag receives the information, it sends the tag ID information and the transmission time.

Step S2012, after multiple LED lamps receive the information, after collecting the ID information, launch and arrival time, and signal strength, each LED lamp sends the information to the monitoring computer through the PLC. After the monitoring computer receives the data, it processes the data through the built-in indoor algorithm. If the data is found to be incomplete, it can ask the LED light to resend the data, or re-measure and then send the data. If the processed data is correct, the exact location information of ID1 will be obtained and stored, and its location will be marked on the 3D indoor map at the same time. At the same time, it sends a message to the LED lamp that the processing is completed, and the next label is positioned. After the LED lamp receives the information, it sends out the room number to the ID1 tag. After receiving the message, ID1 edits the tag information, adds the location information of the room to the tag, and the reply is completed.

In step S2014, after the LED light receives the information, start the positioning process for the next label, that is, repeat steps S2002 to S2012 until all the labels are located.

The method in the embodiment of the present invention can also be used for counting and positioning logistics company warehouse items. For other similar item positioning requirements, the method in the embodiment of the present invention can also be used. Through the method in the embodiment of the present invention, items can be quickly located in various situations.

It should be noted that each of the above-mentioned modules can be implemented by software or hardware. For the latter, it can be implemented in the following manner, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned modules are respectively located in multiple in the processor.

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the above-mentioned storage medium may be configured to store program codes for performing the following steps:

S1, sending an inquiry instruction for instructing the optical tag to report tag information to the optical tag through downlink light;

S2, receiving the tag information reported by the optical tag through the uplink light according to the query instruction;

S3. Determine the position of the optical tag at least according to the tag information.

Optionally, the storage medium is also configured to store program codes for performing the following steps:

S1, receiving an inquiry instruction sent by the optical label reading and writing device for determining the position of the optical label through downlink light, wherein the inquiry instruction is used to instruct the optical label to report label information, and the label information is used to determine the position of the optical label ;

S2, sending the label information to the optical label reading and writing device according to the above inquiry command.

Optionally, in this embodiment, the above-mentioned storage medium may include but not limited to: U disk, read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), Various media that can store program codes such as removable hard disks, magnetic disks, or optical disks.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and optional implementation manners, and details are not repeated in this embodiment.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (20)

1. A label position determination system, characterized in that, comprising: The optical tag is arranged on the article, and is used to receive the inquiry instruction sent by the optical tag reading and writing device through the downlink light and/or send the label information of the optical tag to the optical tag reading and writing device through the uplink light, and the inquiry The instruction is used to instruct the optical tag to report tag information, and the tag information is used to determine the position of the optical tag; One or more optical tag reading and writing devices, configured to send the query instruction to the optical tag through the downlink light and/or receive the tag information sent by the optical tag through the uplink light. 2. The system according to claim 1, wherein the optical tag comprises: a photocell, configured to receive downlink light and convert the downlink light into electrical energy, and/or receive the inquiry instruction; A power management module, configured to perform at least one of the following operations: storing the electrical energy, supplying power to the light transmitter, and supplying power to the microcontroller processor; an optical transmitter, configured to transmit the tag information through the uplink light; a memory for storing the tag information; A microcontroller processor, configured to perform at least one of the following operations: controlling the photovoltaic cell to receive the downlink light, controlling the photovoltaic cell to receive the inquiry instruction, controlling the power management module to supply power to the light transmitter, controlling The light transmitter sends the tag information, and controls the memory to store and compare the tag information. 3. The system according to claim 1, wherein the optical label reading and writing device comprises: a light detector, configured to receive the tag information; a light emitting diode LED, used to emit downlink light and/or send the inquiry instruction; The control chip is configured to perform at least one of the following operations: controlling the LED to emit the downlink light, controlling the LED to send the inquiry instruction, and processing the label information. 4. The system according to claim 1, further comprising: A computing device, configured to calculate the position of the optical tag at least according to the tag information. 5. A method for determining a label position, comprising: sending an inquiry command to the optical tag through downlink light to instruct the optical tag to report tag information; receiving the tag information reported by the optical tag through the uplink light according to the inquiry instruction; The position of the optical tag is determined according to at least the tag information. 6. The method according to claim 5, further comprising at least one of the following after determining the position information of the optical tag at least according to the tag information: storing information on the location of the light tag; sending information about the location of the optical tag to the optical tag; Using the position information of the optical tag and the pre-saved position information of the optical tag to determine the movement information of the optical tag. 7. The method according to claim 5, wherein determining the position of the optical tag at least according to the optical tag information comprises: sending the tag information to a computing device for calculating the position of the optical tag; Using the computing device to determine the location of the optical tag based on at least the tag information. 8. The method according to any one of claims 5 to 7, characterized in that: The tag information includes at least one of the following: identification ID information of the optical tag, time when the optical tag sends the tag information; and/or, Determining the position information of the optical tag at least according to the tag information includes: determining the position of the optical tag according to the tag information and at least one of the following information: the time when the tag information is received, the time when the tag information is received signal strength. 9. A method for determining a label position, comprising: Receive an inquiry instruction sent by the optical label reading and writing device for determining the position of the optical label through downlink light, wherein the inquiry instruction is used to instruct the optical label to report label information, and the label information is used to determine the optical label s position; Sending the label information to the optical label reading and writing device according to the inquiry instruction. 10. The method according to claim 9, characterized in that, after sending the label information to the optical label reading and writing device according to the inquiry instruction, further comprising: The position information of the optical tag sent by the optical tag reading and writing device is received. 11. The method according to any one of claims 9 to 10, wherein the label information includes at least one of the following: The identification ID information of the optical tag, and the time when the tag information is sent. 12. A tag position determination device, characterized in that it comprises: The first sending module is configured to send an inquiry instruction for instructing the optical tag to report tag information to the optical tag through downlink light; A first receiving module, configured to receive the tag information reported by the optical tag through the uplink light according to the inquiry instruction; A first determining module, configured to determine the position of the optical tag at least according to the tag information. 13. The device according to claim 12, further comprising at least one of the following: a saving module, configured to save information about the position of the light tag; a second sending module, configured to send information about the location of the optical tag to the optical tag; The second determination module is configured to determine the movement information of the optical tag by using the position information of the optical tag and the pre-saved position information of the optical tag. 14. The device according to claim 12, wherein the first determining module comprises: a sending unit, configured to send the tag information to a computing device for calculating the position of the optical tag; A determining unit, configured to determine the position of the optical tag at least according to the tag information by using the computing device. 15. Apparatus according to any one of claims 12 to 14, characterized in that: The tag information includes at least one of the following: identification ID information of the optical tag, time when the optical tag sends the tag information; and/or, The first determining module includes: determining the position of the optical tag according to the tag information and at least one of the following information: time of receiving the tag information, and signal strength when receiving the tag information. 16. An optical label reading and writing device, characterized in that it comprises the device according to any one of claims 12-15. 17. A tag position determining device, characterized in that it comprises: The second receiving module is used to receive an inquiry instruction sent by the optical label reading and writing device for determining the position of the optical label through downlink light, wherein the inquiry instruction is used to instruct the optical label to report label information, and the label information for determining the position of the light tag; A third sending module, configured to send the tag information to the optical tag reading and writing device according to the inquiry instruction. 18. The apparatus of claim 17, further comprising: The third receiving module is configured to receive the position information of the optical tag sent by the optical tag reading and writing device. 19. The device according to any one of claims 17 to 18, wherein the tag information includes at least one of the following: The identification ID information of the optical tag, and the time when the tag information is sent. 20. An optical label, comprising the device according to any one of claims 17-19.