WO2022018083A1 - Device for obtaining marking data, system, method and corresponding program - Google Patents

Abstract

The invention relates to a data capture device for capturing data written on a label, in the form of a code. According to the invention, such a device comprises: - means for obtaining, from distance sensing means, a first data item representative of a distance separating the distance sensing means from a substantially flat surface, referred to as the activation distance; and - a control module comprising means for activating a light source of the data capture device for implementing the means for activating the light source when the activation distance is less than a first previously determined value; - means for obtaining, from the distance sensing means, a second data item representative of a distance separating the distance sensing means from the substantially flat surface, referred to as the sensing distance; and - means for activating an optical imaging sensor, implemented by the control module when the sensing distance is less than a second previously determined value; and - means for determining the presence of a code, from an image obtained by the optical sensor; and - means for transmitting data representative of the previously captured code to a control device, the means being implemented when the means for determining the presence of the code have delivered a positive result.

Description

DESCRIPTION

Title: DEVICE FOR OBTAINING MARKING DATA, SYSTEM, METHOD AND CORRESPONDING PROGRAM

1. Domain

The invention relates to the field of logistics. The invention relates more particularly to the field of obtaining marking data inscribed on labels stuck on pallets present in storage warehouses. More particularly still, the invention relates to a system and a method for obtaining these marking data during manipulations carried out by a driver using a forklift, also generally called a mobile device of movement of loads.

2. Prior Art

With the increase in online commerce and the proliferation of merchandise exchanges around the world, the management of large quantities of inventory has become a crucial issue for the manufacturing industry and the trade industry. More specifically, the management of the logistics chain for the supply and distribution of goods is a real challenge, both commercial and technical. In general, the goods to be marketed are produced in countries far removed from the country or continent in which they are marketed. Typically, consumer electronics products are manufactured in Asia and often sold in Europe or the United States.

The journeys made by these products are numerous, from the place of production to the place of consumption. Very often, the products are stored in storage or transit warehouses and they are palletized. The warehouses in which these products are stored are very large. It is therefore necessary to carry out careful management of the products stored there. This requires in particular to scan, on a regular basis, the products stored there, in order to have, in real time, on the one hand information relating to the stock and on the other hand information relating to the storage locations of goods. . The pallets (for handling or shipping, for example of the EUR-EPAL™ type) of products are transported within the warehouse by means of a forklift driven by a forklift driver. The driver performs more or less dangerous missions: routing, storage and destocking. The forklift driver's work may also include pallet building tasks. The forklift driver has an important role in the production chain: he manages the provision of goods and thus avoids disruptions in order preparations, for example.

SUBSTITUTE SHEET (RULE 26) For these reasons, forklift operators carry out many pallet scanning operations. Pallets are scanned, for example, when they arrive in the warehouse, when they are moved (for example to a storage location), when they are extracted from the storage location, when they leave the warehouse, etc.

To date, there are mainly two types of methods to perform these pallet scans. The first type of method is manual: the driver, equipped with a manual scanning device (of the linear laser technology shower type), manually scans the pallets, possibly when he is seated on the seat of his forklift and during transport and lifting of one or more pallets. This type of method has two major drawbacks. The first drawback is the dangerousness of the manipulations carried out by the forklift operators to carry out these perilous scans: the handling pallet(s) often being relatively far from the scanning handheld, the driver is obliged to extend his arm from the seated position that he occupies the seat of the forklift (see getting up), while remaining in the driving position. Accidents can happen, which is detrimental. Additionally, forklift operators still use a PDA to read barcodes on a loaded pallet of product and identify a location code, which is around 300 scans per day with material over 800g often leading to musculoskeletal issues. . The second drawback lies in the loss of time: the pallet scan with this first type of method is long (5 to 7 seconds per pallet), and consequently implies having additional human resources to be able to carry out all the handling operations in a warehouse.

The second type of scan method is based on semi-automation. More specifically, the forklift is fitted with a device which scans the loaded pallets, at the request of the driver, who has, on the forklift, an activation command for this device. The device is a laser scanner, positioned behind the forklift's handling fork, but close enough to it to be able to spread a laser beam widely without obstruction. This type of method has the advantage of not requiring dangerous maneuvers for the driver and provides substantial time savings in handling operations. However, this type of device is very expensive. Indeed, to overcome the scanning difficulties related to the positioning of the labels on the pallets on the one hand, and the positioning of the pallets on the fork of the forklift on the other hand, the scanning system is oversized. The laser beam which is used for the scanner mounted on the central part of the fork of the forklift allows scanning on loan of 1.12 m ² (width 0.80m, height 1.40m). This covered area ensures that the laser scanner is able to scan the label if it is on this detection field. However, this type of scanner is very expensive and remains confidential in terms of distribution. In addition, this type of XXL reader is fragile: just like the manual scanner, the laser technology used requires the use of a wide diffusion laser beam, this wide diffusion requiring on the one hand a large opening on the front of the scanner and a large amplitude lateral displacement of the beam. However, forklifts are commonly subject to very significant operating and loading constraints. It is not uncommon in particular for products to escape from the pallets and fall on the ground, but also on the fork or behind the fork, between the blades of the latter, precisely at the place where this laser scanner is located. , which can lead to its deterioration, and therefore induce significant maintenance costs.

There is therefore a need to provide a solution that includes the advantages of the automatic solution, but with lower costs and improved maintenance possibilities.

3. Summary of the invention

The invention has been developed keeping these issues in mind. More particularly, the invention relates to a device for capturing data written on a label, in the form of a code. According to the invention, such a device comprises: means for obtaining, from distance sensing means, a first datum representative of a distance separating the distance sensing means from a substantially flat surface, called activation distance; and a control module comprising means for activating a lighting source of the data capture device to implement the means for activating the lighting source when the activation distance is less than a first previously determined value; means for obtaining, from the distance sensing means, a second datum representative of a distance separating the distance sensing means from the substantially flat surface, called sensing distance; and means for activating an optical shooting sensor, implemented by the control module when the sensing distance is less than a second value determined beforehand; and means for determining, from an image obtained by said optical sensor, the presence of a code; and means for transmitting, to a control device, data representative of the code picked up beforehand, said means being implemented when the means for determining the presence of the code have delivered a positive result.

Thus, it is possible to scan one or more codes or labels from a pallet in a simple and inexpensive way.

According to a particular characteristic, said optical shooting sensor is in the form of a mobile communication terminal of the smart phone or tablet type.

Thus, the device of the invention is inexpensive and easy to maintain: damage to the optical pickup means can be easily repaired, at lower cost.

According to a particular characteristic, the distance sensing means, the activation control module and the optical shooting sensor are integrated within a sensing box, the distance sensing means and the optical shooting sensor of view being positioned on the front face of said capture box.

Thus, it suffices to enclose the various means constituting the device within a capture box, and to leave the openings necessary to allow the implementation of these means, while ensuring perfect maintainability of the device.

According to a particular characteristic, the capture box is intended to be fixed on a load backrest of a fork of a lift truck, so that the optical capture means are positioned in a substantially central position, between two beams of the backrest of charged.

Thus, the device of the invention can be placed and removed in a simple and effective manner. Furthermore, the box comprises one or two shoes (soles) for fixing to one or two beams of the load backrest to ensure the stability of the device. The installation is made so that the distance sensing means and the optical means are set back slightly from a plane formed by the beams of the load backrest.

According to a particular characteristic, the capture box comprises means for transmitting data to said control device. Thus, the control device receives, for example using a wireless communication interface, the information coming from the capture device.

According to a particular characteristic, the capture box further comprises said light source, in the form of a lighting panel integrated into the front face of the capture box so that said light source is capable of illuminate the flat surface for the shot taken by the optical pickup means. Thus, it is easy to achieve illumination of the pallet to be scanned.

According to a particular characteristic, the sensing device further comprises means for obtaining, from distance sensing means, a third piece of data representative of a distance separating the sensing device from the surface of the ground, called second activation distance; and the means for activating the lighting source and the means for activating an optical pickup sensor are controlled as a function of the second activation distance.

Thus, it is possible to illuminate the target of which one wishes to obtain a shot (i.e. a pallet wrapper) according to several distinct situations.

According to a particular characteristic, the means for activating the lighting source and the means for activating an optical shooting sensor are controlled according to an operating mode of the capture device, said operating mode being selected by a user of said capture device.

Thus, it is possible to activate shooting only in certain particular situations which depend on the mode of operation in which one finds oneself.

According to a particular characteristic, the capture device further comprises means for capturing ambient light, delivering a value representative of ambient light and in that shooting parameters of the optical shooting sensor are adjusted depending on the representative value of the ambient light.

Thus, it is possible to obtain an image that is as clear and usable as possible for capturing data (QR codes) on the pallet.

According to a particular characteristic, the capture device further comprises means means for determining a location of a mobile device for moving loads, on which the capture device is installed.

Thus, it is possible to locate the mobile device for moving loads in the warehouse in which it is located.

According to a particular characteristic, the means of the means of determining the location of the mobile device for moving loads are connected to the control module so as to allow the transmission of an alert message intended for a user of the mobile device of moving loads when the detected location of the mobile load moving device does not correspond to an expected location.

Thus, it is possible to best guide the operator of the mobile load moving device in order to avoid loading errors. According to another aspect, the invention also relates to a data capture system. Such a system comprises: a data capture device as previously described, and a control device, connected to said data capture device via a wireless communication interface;

According to one particular characteristic, said control device comprises a wired communication interface with a user communication device, said wired communication interface simulating, for said user communication device, the implementation of a data entry.

Thus, the control device can simulate the presence of a keyboard for the user communication device and therefore facilitate the entry of data from the capture device.

According to another aspect, the invention also relates to a method for capturing data written on a label, in the form of a code, method implemented via a system for capturing data written on a label. Such a method comprises: a step of obtaining, from distance sensing means, a first datum representative of a distance separating the distance sensing means from a substantially flat surface, called activation distance; and when the activation distance is less than a first pre-determined value, a step of activation, by a control module, of a lighting source of the data capture system; a step of obtaining, from distance sensing means, a second datum representative of a distance separating the distance sensing means from the substantially flat surface, called sensing distance; and when the sensing distance is less than a second value determined beforehand, a step of activation, by the control module, of an optical shooting sensor, delivering at least one image; and a step of determining, from said at least one image obtained by said optical sensor, the presence of a code; and a step of transmitting, to a control device, data representative of the code picked up beforehand, when the step of determining the presence of the code is positive. According to a preferred implementation, the various steps of the methods according to the invention are implemented by one or more software or computer programs, comprising software instructions intended to be executed by a data processor of a relay module according to the invention and being designed to control the execution of the various steps of the methods.

Consequently, the invention also relates to a program, capable of being executed by a computer or by a data processor, this program comprising instructions for controlling the execution of the steps of a method as mentioned above.

This program may use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in partially compiled form, or in any other desirable form.

The invention also relates to an information medium readable by a data processor, and comprising instructions of a program as mentioned above.

The information carrier can be any entity or device capable of storing the program. For example, the medium may include a storage medium, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or else a magnetic recording medium, for example a mobile medium (memory card) or a Hard disk.

On the other hand, the information medium can be a transmissible medium such as an electrical or optical signal, which can be conveyed via an electrical or optical cable, by radio or by other means. The program according to the invention can in particular be downloaded from an Internet-type network.

Alternatively, the information medium may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.

According to one embodiment, the invention is implemented by means of software and/or hardware components. From this perspective, the term "module" may correspond in this document to a software component, a hardware component or a set of hardware and software components.

A software component corresponds to one or more computer programs, one or more sub-programs of a program, or more generally to any element of a program or software capable of implementing a function or a set of functions, as described below for the module concerned. Such a software component is executed by a data processor of a physical entity (terminal, server, gateway, set-top-box, router, etc.) and is likely to access the hardware resources of this physical entity (memories, recording media, communication bus, electronic input/output cards, user interfaces, etc.).

In the same way, a hardware component corresponds to any element of a hardware assembly (or hardware) able to implement a function or a set of functions, according to what is described below for the module concerned. It can be a hardware component that can be programmed or has an integrated processor for executing software, for example an integrated circuit, a smart card, a memory card, an electronic card for executing firmware ( firmware), etc

Each component of the system described above of course implements its own software modules.

The various embodiments mentioned above can be combined with each other for the implementation of the invention.

4. Figures

Other characteristics and advantages of the invention will appear more clearly on reading the following description of a preferred embodiment, given by way of a simple illustrative and non-limiting example, and the appended drawings, among which: FIG. describes the general principle of the invention; FIG. 2 briefly describes the internal architecture of an exemplary embodiment; FIG. 3 illustrates the external architecture of an exemplary embodiment; Figure 4 the device of Figure 3 secured to a backsplash.

5. Description of an embodiment

5.1. Reminders

The general principle of the technique described consists in the use of optical capture and processing means to obtain the data present on the different codes (one-dimensional barcodes, two-dimensional barcodes) when loading the pallet on the forklift. The device of the invention is therefore implemented in motion, when the forklift loads the pallet onto the loading fork, through an entrance to the pallet, and this fork progresses into the entrance to the pallet selected by the driver. . Of course, in the context of the invention, the pallet comprises a set of products, arranged on the pallet. Rather than using a very expensive and relatively fragile laser sensor, the general principle consists in using a mass market optical sensor associated with a bar code detection application. As the visibility of the information is not ensured, the device which is the subject of the invention also comprises additional lighting means. In order not to be permanently activated, the additional lighting means are controlled via a control module, which receives, from an appropriate sensor, data representative of a distance separating the optical sensor a globally flat surface, which represents the surface of a filled and possibly filmed pallet. It is thus possible to locate the label in the image in order to be able to read several stacked pallets (stacked pallets) or read several packages assembled on the same pallet.

A lined and wrapped pallet is a pallet, usually made of pine, on which a set of products has been placed. So that these products are stable on the pallet, it is possible to film it, that is to say to surround it with plastic film, allowing to obtain a certain solidarity of the products which have been placed on the pallet. . The assembly is referred to as a “filmed pallet” by those skilled in the art. The “wrapping” (action of wrapping the pallet in plastic film) is carried out either manually or automatically depending on the product production line. When the stacking of the products on the pallet is finished, an identification label is affixed to it (at least on one side of the rectangular parallelepiped made up of the pallet and the products placed on it. Ideally, each side of the pallet has an identification tag, in order to facilitate the operations of the forklift operators. From the point of view of the invention, it is therefore considered that a pallet is a rectangular parallelepiped, and that one face, generally flat, of this rectangular parallelepiped is visible from the device that is the subject of the present technique From this point of view, the postulate at the base of the invention is not different from that taken for the existing automatic devices based on laser capture.

Be that as it may, the device of the invention has a sensor making it possible to evaluate the distance separating a flat surface from the optical sensor. When this distance is less than or equal to a first predetermined distance (due to the progression of the fork of the lift truck), the control module activates the additional lighting in order to present improved shooting conditions. This aspect is important because the inventors have observed that the lighting conditions are not necessarily adequate in all the places in which the scan of the pallet must be carried out. Secondly, still using the distance measuring means, a second distance is evaluated. This second distance, capture, corresponds to the focusing distance of the optical sensor. It ensures, given the position of the device of the invention on the fork of the lift truck, that the shot will have sufficient sharpness to obtain a good quality image. When this second distance is reached (due to the progression of the lifting forks of the forklift on an entry of the pallet), the control module transmits, to the optical capture and processing means, a command to shoot and decoding.

Cleverly, the optical capture and processing means are "general public" means of the communication terminal type (smartphone) or even action camera, on-board camera, digital camera, digital tablet or equivalent devices, which offers, in addition of the advantages provided by the device, two important advantages: on the one hand, it is easy and inexpensive to replace the optical capture and processing device in the event of breakage or malfunction because they are abundant on the market and very inexpensive . On the other hand, it is possible to directly use the intrinsic code "decoding" capacities (one dimension, two dimensions, etc.) of these devices without additional computer development, further reducing the cost of the device of the invention ( the decoding application developed for the implementation of the invention can be installed indistinctly for the majority of types of terminals). An additional advantage is to allow the manufacturer to have terminals that suit his IT architecture (for example in terms of choice of supplier of this type of terminal, but also in terms of securing the information system). Finally, a final advantage procured by this type of device is to allow capture and decoding of several codes, which is not necessarily possible with other technologies or else very costly.

Thirdly, the image obtained by the optical sensor is decoded (i.e. a code search step and a step of decoding the information contained in these codes are carried out) and the information obtained is transmitted to a processing module (the processing essentially depends on the business application, outside the scope of this technique.

Fourthly, once the data has been transmitted, the device is switched off, in particular the additional lighting is switched off, just like the optical capture and processing device. There is presented, in relation to FIG. 1, a method for capturing data written on a label, in the form of a code, according to the invention, method implemented by means of a data capture device listed on a label. Such a method comprises: a step of obtaining (ilO), from distance sensing means, a first datum representative of a distance separating the distance sensing means from a substantially flat surface, called distance d activation (dl); and when the activation distance (dl) is less than a first previously determined value (DD1), a step of activation (i20), by a control module, of a lighting source of the data capture system ; a step of obtaining (i30), from distance sensing means, a second datum representative of a distance separating the distance sensing means from the substantially flat surface, called sensing distance (d2); and when the capture distance is less than a second previously determined value (DD2), a step of activation (i40), by the control module, of an optical shooting sensor, delivering at least one image (Img ); and a step of determining (i50), from said at least one image (img), the presence of a code (Cde); and a step of transmitting (i60), to a control device, data representative (DATA) of the code (Cde) previously picked up, when the step of determining the presence of the code is positive.

The device that is the subject of the present technique has many advantages. In addition to its low cost compared to competing devices and its maintainability, we can also mention the fact that the device allows, in addition to its original functions (i.e. the scanning of pallets and storage) to automatically record and archive images of the pallets, thanks to the means of optical capture. This feature provides evidence of the condition of pallets upon receipt to ensure effective quality control. Which was not possible with the old systems. Therefore, the "cheating" of poor quality pallets can be drastically reduced. The combination of data obtained (code scan, palette images and timestamp) can then be used to forge a signature of support and attest to the veracity of the information provided to a customer or supplier. Another advantage also lies in the fact that the device makes it possible to carry out warehouse inventories more quickly: a forklift operator on an equipped forklift can read all the pallet and location codes of a row of racks, from bottom to top or vice versa and use an appropriate application to fill in an “inventory” file. As a result, the time spent carrying out an inventory with the device of the invention is reduced and therefore the inventory is less costly. Compared to drone systems or pallet-mounted systems manipulated by a forklift operator with industrial cameras, the device of the invention does not need to be removed from the forklift and is therefore much simpler than these existing systems. which remain complicated to implement and very expensive.

In addition, the capture device comprises, in at least one exemplary embodiment, additional characteristics which make it possible to increase the interaction between the "handling of pallets" as such and the processing of data coming from these pallets or from the forklift. Thus, the device of the invention also comprises, in at least one exemplary embodiment, means for obtaining, from the distance sensing means (or additional distance sensing means arranged in the lower part of the housing), a third datum representing a distance separating the distance sensing means from the surface of the ground, called the second activation distance; this second activation distance is managed according to the operating mode (automatic or preselected by the user) and it makes it possible to determine whether the lighting and the capture of the shot must be activated or not (in particular for operating modes "RECEPTION", "REPLENISHMENT" or "PREPARATION" which are described below). This distance from the surface on the ground makes it possible to determine whether the forks of the lift truck are in the low position or in the high position, this "low" or "high" position making it possible to determine whether or not the capture means are activated. depending on the operating mode the lift truck is in. The distance sensing means are in the form of an accelerometer and/or an infrared type cell, integrated in the lower part of the casing.

In addition, the device also comprises, in at least one exemplary embodiment, means for capturing ambient light, and means for configuring the shot as a function of these means for capturing ambient light (and of a value of ambient light delivered by these means). These shooting parameterization means make it possible to automatically adjust shooting parameters, such as the ISO and the opening time of the optical means to obtain the sharpest image possible, a lens being moreover, help of this image (as clear as possible) to determine the number of barcodes or QR codes present on this image. Thus, the presence of one or more codes is determined from an image obtained by said optical sensor, the result of determining the presence of a code or more codes being considered positive when one or more codes are detected and that these codes meet the software search criteria determined for each customer (number of data characters, symbology, orientation, size, data, position of the code or of the pallet label in the image) and negative in the case contrary (when codes are detected but do not meet the criteria, the result is negative).

Furthermore, insofar as the forklift performs numerous manipulations of pallets, the device further comprises, in at least one embodiment, means for saving the images acquired, allowing the recording and archiving of each image taken in order to be able to restore them, from a computer server (on which the images are recorded) to give users the possibility of carrying out searches according to the value of the code identifying the pallet or the value of the code identifying its location . This data is used in particular to find pallets during inventory or to obtain proof of the quality of the identified pallet (Bad filming, damaged package, broken support, etc.). Each image is saved in the capture device installed on the forklift, then when the device is switched off from the control panel installed in the forklift cabin (for example at the end of the working day) a continuous backup battery to supply the mobile communication terminal so that it can connect to the WIFI backup server and synchronize all the images taken during the period of use. Once the synchronization is complete, these images are erased from the communication terminal and the latter switches to standby mode or automatic power-off mode.

Furthermore, within the cabin, the capture device also comprises, in at least one embodiment, means for real-time display of images acquired by the camera device, allowing the user (forklift drivers) to visualize in real time the image taken by the means of optical capture on a terminal or a tablet on board the cabin. During an operation where the operator must pick up several pallets stacked on top of each other, this function allows the user to select directly on the screen, with a simple click, the pallet to be processed (for example the bar code is framed by a colored rectangle on the image) and therefore to send the correct bar code data in the computer system. This again avoids the user having to leave the seat of the forklift to perform a manual input operation.

Finally, the capture device also comprises, in at least one exemplary embodiment, means for obtaining a position of the lift truck, from radio position capture means by RADIO ULTRA WIDE BAND technology, making it possible to locate the system in space when it is installed on a Self-supporting, Retract or Frontal type handling truck. This localization (or geolocalization, as indicated later) makes it possible to control the position of each system during the loading of trucks to warn the user of a possible loading error. The means described above constitute as many steps for implementing the control method.

5.2. Description of an embodiment

An exemplary embodiment of the internal electronic architecture of the device of the invention is presented below, in which the means of optical capture and processing are embodied by a mobile communication terminal of the smartphone type.

FIG. 2 explains the internal electronic architecture of the device of the invention in this exemplary embodiment. It comprises a first assembly (Ensl) comprising at least one light (El, E2), a first control module (MCI), distance sensing means (CD), a second control (MC2) and input means optical (e.g. smartphone SM). It also comprises a second assembly (Ens2) comprising a geolocation module (UWB), a local network manager (MC3), an input converter (MC4). In this exemplary embodiment, advantage is taken of a set of components which are connected, within the device of the invention via a communication network. More particularly, in this exemplary embodiment, the communication network is a wireless network of Wifi and/or Bluetooth type. Such an implementation within the device is clever in that it allows modularity and easy maintenance of the device and its components, and therefore greatly reduces costs. Furthermore, the device is powered by the forklift (using a suitable CONV converter) and also has its own emergency power supply (battery Batt).

More particularly, in this example embodiment:

MCI: is an Arduino type Wifi microcontroller (model used ESP32). MCI manages remote cell and system startup when powering up. MCI is also in charge of starting and shutting down MC2 properly. MCI also registers the ambient light level via a photoresistor. MC2: is a microcomputer of the RASPBERRY type, whose operating system is a “Linux™”, and which, in this example, makes it possible to control the “Android” smartphone via commands of the “Android Debug Bridge (ADB)” type; MC2 manages the startup of the smarpthone, and its extinction once the power supply is cut; MC2 is also in charge of powering down the whole device once the power is off. Since the device is installed on an industrial truck, it is powered by the forklift's battery, either 24V or 48V, which can be cut off at any time. It is for this reason that the device must detect the power cut and then switch to the battery (Batt) to then turn off the elements properly one by one.

The device could be driven alone by the MC2 module; in this example, the choice was made to add the MCI module for faster nominal operation. However, MCI functions can be fully integrated into MC2 modules.

The mode of operation, for these elements of the first set (Ensl), is globally as follows: MCI, which manages distance sensing means (CD), transmits commands to MC2, according to the distance detected as explained previously, then depending on these commands, MC2 itself controls the triggering of the bar code reading application via ABD commands via the USB port of the smartphone (Note that the commands to the smartphone can also be transmitted in WiFi or Bluetooth, but this leads to an additional latency time that the inventors have decided to eliminate - elimination of a command transiting via MC3). MC2 also controls the triggering of lighting according to the level of luminosity transmitted by MCI. MCI also communicates directly with MC3 to transmit geolocation commands (geolocation performed via the UWB module). As detailed below, geolocation begins when a pallet is present on the forks of the truck and geolocation stops when the pallet comes out of the forks. Thus, it is possible, at any time, to determine the position of the pallet in the warehouse.

As for the second set (Set2), the components are as follows:

MC3: is an Arduino type Wifi microcontroller (model used ESP32); MC3 plays, in this configuration, the role of WIFI access point in the system, so it receives the information on the detection distance of the pallet via the MCI module and the data from barcodes read via the smartphone; The MC2 module also connects to it to become part of the network.

MC4 is an ARDUINO MICRO or TEENSY type microcontroller in order to convert the data received into HID type data (keyboard emulation). The data received and processed by MC3 is transmitted to MC4. MC4 receives data from MC3. When this data corresponds to that of a bar code, it is transmitted to a control device (Dcli) (present for the driver in the forklift, for example of the tablet type, managing a business application) in keyboard emulation mode ; when the data corresponds to a cell distance (indicating that the pallet is completely retracted into the forks) then MC4 commands UWB to start geolocation; when the data corresponds to a cell distance (indicating that the pallet is completely out of the forks), then MC4 commands UWB to stop the geolocation.

UWB is in this example an Ultra Wide Band geolocation map; The purpose of this card is, for example, to detect a platform number that the truck passes through when loading or unloading trailers or other location needs; the choice of Ultra Wide Band technology makes it possible to obtain precise and very fast measurements (up to 10 measurements per second) compared to Bluetooth technology for example.

More precisely, when MC4 orders UWB to start geolocation, UWB transmits the distance at which it is located from the anchors. An anchor is also a fixed UWB map, whose position is known for a given configuration (for example a loading or unloading dock). An anchor is for example positioned every four quays. The MC4 modules thus receive distances between the UWB module and all the anchors it detects. Several methods of geolocation are then possible. An immediate method, adapted to a loading/unloading dock location context, consists of classifying the anchors from the closest to the furthest. When MC4 calculates that the distance between UWB and the two closest anchors is equal to plus or minus 2% close to the actual predetermined distance between each anchor, then MC4 determines the number of the quay according to the distance at which it is of these two anchors. This dock number is transmitted to the client tablet (DCIi) in keyboard emulation mode to fill in the correct field in the business application.

In other words, the exchanges between the modules of the device are as follows: The distance sensing cell transmits the distance to MCI.

MCI transmits the instructions according to each distance to MC2 via the serial port (in wired mode) and also transmits these instructions to MC3 which communicates to it via the serial port with UWB to obtain the position.

Once instructions have been received from MCI, MC2 controls the smartphone on triggering reading and also manages the battery charge (Batt) to avoid a permanent charge which could quickly wear it out. MC2 also controls the lighting. Depending on the ambient luminosity which is detected by a photoresistor, MC2 adjusts the power of the lighting, if necessary.

When reading the code(s) (one-dimensional, two-dimensional bars, QR code, etc.), the decoded data from the smartphone is transmitted from the smartphone to MC3 in WIFI, which in turn transmits it in wired mode (serial port to MC4 ), which in turn transmits them to the tablet in wired mode (USB HID Keyboard; Simulation of a simple barcode scanner or keyboard).

When the device is in loading mode or checking the removal of the pallets before loading, MC4 requests the position from UWB and transmits it to the tablet in wired mode (USB HID Keyboard; Simulation of a simple bar code scanner or keyboard) .

Of course, what is described here is an exemplary embodiment. It is quite conceivable (and envisaged) that all or part of the modules be combined or joined in a single and same control module, which is able to perform the functions inherent in each module, as previously described. In particular, this control module could take the form of a software module, for example installed on a dedicated controller card, which would manage all of the procedures implemented, in particular those described previously.

The Ensl assembly (also called the capture device) can be positioned on the backrest, as shown below, while the Ens2 assembly (also called the control device) can be positioned in the lift truck and connected to a tablet of a management solution provider for warehouse managers. This distinction into two sets has an advantage in this embodiment: The Ensl set is made of impact-resistant materials (for example metal) and can be fixed to the backsplash. Conversely, the Ens2 assembly, comprising in particular the geolocation device, is inserted into a plastic assembly, connected “wired” to the solution provider's tablet, in order to simulate the presence of an input keyboard. The wireless network is established between the set Ens1 and the set Ens2, as explained above, to carry out data transmission in a “local” network specific to the device of the invention.

5.3. Description of the external architecture

An example of implementation of the device of the invention (Ds) is described in relation to FIGS. 3 and 4. In this exemplary embodiment, the device of the invention makes it possible both to integrate perfectly with the load backrests placed on the forks of the handling trucks. It is recalled that a load backrest (also called a load backrest) is a protective steel grid mounted on an industrial truck to cushion a pallet when it is gripped by the fork. One function of this backsplash is to "wedge", in a way, the palette and its contents. A problem with the semi-automatic systems of the prior art (laser-based) is that these load backrests can interrupt the laser beam, and therefore limit the possibilities of scanning codes present on the pallet.

Thus, in a basic version, the device (Ds) is in the form of a rectangular parallelepiped with dimensions of 500 mm (width)×180 mm (height)×30 mm (depth). The front face comprises, in the upper central part, an opening (01), making it possible to house the optical sensor (for example the optical sensor of the smartphone). This opening 01 can be circular or rectangular and is adapted according to the communication terminal. With regard to this opening, inside the device, a housing is provided to be able to embed the smartphone there. A cover can be provided to secure the smartphone. In the lower central part, a double opening is made (02). This double opening is used to position the distance detection means, which in this embodiment is in the form of a double ultrasonic cell. Other distance sensing technologies can be considered. The advantage of this type of sensor is its good quality/price ratio and the accuracy of the distance provided. On either side of these two openings 01 and 02, lighting panels (E1, E2) are integrated. They come in the form of LED panels, with sufficient power to allow efficient lighting of all types of bar code symbologies: the lighting is selected in particular to ensure good shooting, even in minimum light conditions. In addition, on the left side and/or the right side of the front face, fixing means are integrated (EF1). These fixing means (EF1) make it possible to fix the device (Ds) to one of the bars of the load backrest, either on the left or on the right so that on the one hand the lighting (El, E2) is not obstructed by one of the bars of the load backrest and on the other hand that the optical sensor benefits from a central position behind the load backrest. The fixing means may be in the form of soles, brackets or any suitable means. Figure 4 explains the fixing position of the device of the invention, in an example of presentation. Screws or any other appropriate means can be used to enable fixing, using the bracket, to the load backrest. The installation is made so that the distance sensing means and the optical means are set back slightly from a plane formed by the beams of the load backrest

In a complementary manner, the device has, on the rear face and/or on the upper face, a maintenance opening making it possible in particular to position or remove an appropriate communication terminal, possibly accompanied by a protective shell. The interior of the device, for its part, is compartmentalized in order to arrange there all the necessary equipment, and in particular, a battery, a converter and the control module or modules, depending on the embodiments. The advantage of this configuration is that with the proposed system, it is not necessary to modify the backsplash. A standard backsplash can be used, with the device's attachment means. Here again, the invention stands out from competing devices, in particular based on laser scanning, which, in order to have a wider scanning field, necessarily require mechanical modification of the load backrests to have good integration, which does not is not at all the case with the solution of the invention.

5.4. Description of implementation of the device of the invention

The device of the invention is implemented in two distinct situations, corresponding respectively to an entry of a pallet into stock and to an exit of a pallet from stock.

Receipt then storage of a pallet (entry into stock)

When a pallet is picked up by a forklift, as soon as the forks enter it, the distance cell triggers the reading application at 1200mm then at 1100mm the lighting for easier reading. As soon as the code(s) have been read, the Android application installed on the smartphone transmits the data either via WIFI or Bluetooth on the radio reception module, or directly via Bluetooth on the customer tablet (customer business application). Once the pallet has arrived at a distance of 500mm, the lighting and the reading are stopped.

When storing the pallet in the rack slot, once the pallet has been deposited when the forks come out, the cell triggers the slot code reading phase once it reaches 1200mm. The smartphone camera zooms in on the lower part of the image to decode the location tag and transmit the data still through the module Wifi/BT reception or directly via Bluetooth on the customer tablet (customer business application).

Order preparation (out of stock)

When a pallet is picked up by a forklift, as soon as the forks enter it, the distance cell triggers the reading application at 1200mm then at 1100mm the lighting for easier reading. As soon as the code(s) have been read, the Android application installed on the smartphone transmits the data either via WIFI or Bluetooth on the radio reception module, or directly via Bluetooth on the customer tablet (customer business application).

Once the pallet has arrived at a distance of 500mm, the lighting and the reading are stopped.

Upon arrival in the dedicated area for depositing the pallet on its location before loading, as soon as the forks of the trolley withdraw the pallet, the geolocation device directly sends the position to obtain a check between the expected location and that detected .

Loading unloading

When a pallet is picked up by a forklift, as soon as the forks enter it, the distance cell triggers the reading application at 1200mm then at 1100mm the lighting for easier reading. As soon as the code(s) have been read, the Android application installed on the smartphone sends the data either via WIFI or Bluetooth to the radio reception module, or directly via Bluetooth to the client tablet. Once the pallet has arrived at a distance of 500mm, the lighting and the reading are stopped. As the trolley passes through the platform door, its number is transmitted directly to the tablet (customer business application) for validation.

Thus, as has been understood, the capture device of the invention comprises several modes of operation, which substantially correspond to the operations which are carried out by the users during the work of moving the pallets on a forklift in a warehouse. As explained previously, the device of the invention is presented, in at least one exemplary embodiment, in the form of a box connected to the on-board computer of the operator (driver) which allows the reception of data from the box of reading, also allows you to select several operating modes:

A "RECEPTION" mode in which the reading is carried out only when the forks are in the low position (position determined from the means of sensing distance from the surface of the ground) and only when the forks are removed from the pallet in the high position (reading of the location code in the pallet rack), this implementation being automatic and determined from the distance sensing means of the surface of the ground, which evaluate this distance and the variation of this distance, a distance being high or low when the distance variation is small, after a series of first measurements;

A "REPLENISHMENT" mode in which the reading is carried out only in the high position of the forks (position determined from the means for sensing distance from the surface of the ground, as before) when these enter the pallet;

A "PREPARATION" mode in which the reading is done in all the positions (high or low) of the forks when they enter the pallet;

A "LOADING" mode in which the reading is carried out only in the low position of the forks when they enter the pallet, the RADIO position sensing means is activated, then when the truck passes through the dock door where the trailer of the truck to be loaded is located, the distances measured between the reading system and pre-positioned RADIO terminals are transmitted to the device (which is connected) which processes the information received to transform it into a dock number thanks to a predetermined algorithm (optionally, an alert is transmitted/displayed to the user if the platform he is on does not correspond to the platform he should be on). When the forks are removed from the pallet, the RADIO capture means is deactivated.

An "UNLOADING" mode in which the reading is carried out only in the lower position of the forks when they enter the pallet, the RADIO position sensing means is activated, then when the pallet is placed on the ground ( storage), the distances measured between the reading system and pre-positioned RADIO terminals are sent back to the connected device which processes the information to transform it into a location number using a predetermined algorithm (optionally, an alert is transmitted/ displayed to the user if the storage slot he is in does not match the storage slot he should be on). When the forks are removed from the pallet, the RADIO capture means is deactivated.

These operating modes can be determined either automatically according to a routine assigned to the driver at a given moment, or be activated manually by the driver during his various tasks. Thus, thanks to the device of the invention and to these modes of operation, the forklift becomes a data processing means pallets transported, and not just a means of transport. These characteristics make it possible to obtain data on the transported goods and make it possible to increase the safety in the execution of the tasks by the drivers. Finally, the modular architecture of the device of the invention, and in particular the integration of a communication terminal, offers increased maintainability and lower costs.

Claims

Claims 1. Device for capturing data written on a label, in the form of a code, device characterized in that it comprises: means for obtaining, from distance sensing means, a first data representative a distance separating the distance sensing means from a substantially flat and substantially vertical surface, called the activation distance; a control module comprising means for activating a lighting source of the data capture device, to implement the means for activating the lighting source towards the substantially flat and substantially vertical surface, when the activation distance is less than a first previously determined value; means for obtaining, from the distance sensing means, a second datum representative of a distance separating the distance sensing means from the substantially flat surface, called sensing distance; and means for activating an optical shooting sensor, which takes the form of a mobile communication terminal of the smart phone or tablet type, the activation means being implemented by the control module when the sensing distance is less than a second previously determined value; and means for determining, from an image obtained by said optical sensor, the presence of a code; and means for transmitting, to a control device, data representative of the previously picked up code, said transmission means being implemented when the means for determining the presence of the code have delivered a positive result. 2. Capture device, according to claim 1, characterized in that the distance sensing means, the activation control module and the optical shooting sensor are integrated within a capture box, the means distance sensing and the optical shooting sensor being positioned on the front face of said sensing box. 3. Capture device, according to claim 2, characterized in that the capture box is intended to be fixed on a load backrest of a fork of a forklift, so that the optical capture means are positioned in substantially central position, between two beams of the load backrest. 4. Capture device according to claim 2, characterized in that the capture box comprises means for transmitting data to said control device. 5. Capture device, according to claim 2, characterized in that the capture box further comprises said light source, being in the form of a lighting panel integrated into the front face of the capture box of so that said light source is capable of illuminating the flat surface for the shot taken by the optical pickup means. 6. Capturing device, according to claim 1, characterized in that it further comprises means for obtaining, from distance sensing means, a third datum representative of a distance separating the sensing device from the surface of the ground, called the second activation distance; and characterized in that the means for activating the lighting source and the means for activating an optical pickup sensor are controlled as a function of the second activation distance. 7. Capture device, according to claim 1, characterized in that the means for activating the lighting source and the means for activating an optical shooting sensor are controlled according to a mode of operation of the capture device, said mode of operation being selected by a user of said capture device. 8. Capture device, according to claim 1, characterized in that it further comprises means for capturing ambient light, delivering a value representative of ambient light and in that d shooting parameters of the shooting optical sensor are adjusted according to the representative value of ambient light. 9. Capture device, according to claim 1, characterized in that it further comprises means means for determining a location of a mobile device for moving loads, on which the capture device is installed. 10. Capture device, according to claim 9, characterized in that the means of the means for determining the location of the mobile device for moving loads are connected to the control module so as to allow the transmission of an alert message intended for a user of the mobile load-moving device when the detected location of the mobile load-moving device does not correspond to an intended location. 11. Data capture system, system characterized in that it comprises: a data capture device according to one of claims 1 to 10, and a control device, connected to said data capture device via a wireless communication interface; 12. Data capture system, according to claim 11 characterized in that said control device comprises a wired communication interface with a user communication device, said wired communication interface, simulating, for said communication device of user, the implementation of a data entry keyboard. 13. Method for capturing data written on a label, in the form of a code, method implemented via a system for capturing data written on a label, method characterized in that it comprises: a step of obtaining, from distance sensing means, a first datum representative of a distance separating the distance sensing means from a substantially planar surface, called activation distance; and when the activation distance is less than a first pre-determined value, a step of activation, by a control module, of a lighting source of the data capture system; a step of obtaining, from distance sensing means, a second datum representative of a distance separating the distance sensing means from the substantially flat surface, called sensing distance; and when the sensing distance is less than a second value determined beforehand, a step of activation, by the control module, of an optical shooting sensor, delivering at least one image; and a step of determining, from said at least one image obtained by said optical sensor, the presence of a code; and a step of transmitting, to a control device, data representative of the code picked up beforehand, when the step of determining the presence of the code is positive. 14. Computer program product downloadable from a communication network and/or stored on a computer-readable medium and/or executable by a microprocessor, characterized in that it comprises program code instructions for the execution of a cryptographic data processing method according to claim 13, when executed on a computer