A magnetic type label management kit and an in-situ supervision method thereof and a carrier

Abstract

A magnetic label management kit and in-place supervision method, comprising a label, a label seat and a tamper-proof hanging rope, the label is connected through a magnetic contact point and the label seat, realizing power supply and I2C communication, the tamper-proof hanging rope adopts a barb conductive structure, and forcibly removing will trigger the circuit break and key erasure. The label seat integrates a multi-channel I2C expansion module and a CAN bus communication interface, supporting multi-label networking monitoring. In the system networking, the unique position identification of the label seat is set through a dial switch; the initial binding establishes a ternary binding relationship of the label ID, carrier information and key; the in-place state of the label is detected periodically, and the communication security is verified in combination with an RC4 encryption algorithm; the authorized access is guided through an indicator light positioning, and the off-site / abnormal state is reported in real time. The application solves the problems of signal interference, weak anti-disassembly ability and low positioning accuracy of RFID technology in a metal environment, and has the advantages of reliable communication, anti-disassembly detection, accurate positioning and information security.

Description

TECHNICAL FIELD

[0001] The present application discloses a kind of carrier control methods of magnetic attraction type label, and the device involved in the method can be called magnetic attraction type label control kit. BACKGROUND

[0002] With the wide application of Internet of Things technology represented by RFID, the in-situ monitoring, automatic inventory, taking and returning of carriers can be intelligently controlled, but there are still some drawbacks in RFID technology when facing small-sized carriers (such as USB KEY, etc.), such as 1) The carrier is usually stored in a closed metal control cabinet. Due to the characteristics of wireless signals during work, strong reflection or signal blind area is easily generated, resulting in low recognition accuracy. 2) RFID tags do not have anti-disassembly detection capability and are easily removed from the carrier, making the carrier out of control. 3) In high-density storage conditions, RFID technology is difficult to achieve accurate positioning and indication, which is not convenient for users to find. Therefore, the intelligent control of the carrier needs a more accurate, safe and reliable control method.

[0003] For example, CN119321269A describes using a movable antenna to reduce the reflection of radio frequency power and improve wireless signal coverage, but this method has high processing difficulty and low reliability due to the need for action mechanism cooperation. CN202410898345.7 provides a positioning method based on RFID technology, which needs to use multiple readers to achieve through algorithm, which has high implementation cost and complex control, and the result is easily disturbed in a metal closed space due to signal reflection. SUMMARY

[0004] In order to solve the defects in the prior art, the present application discloses a magnetic attraction type label control kit, and the technical scheme is as follows:

[0005] A magnetic attraction type label control kit, comprising: a label, a label seat, and a tamper-proof hanging rope, characterized in that:

[0006] The label comprises:

[0007] A label shell with a label magnet embedded at the bottom;

[0008] A label contact point provided at the bottom of the shell is flush with the bottom surface of the shell;

[0009] A label chip provided inside the shell has a power supply pin and a communication pin connected to the label contact point, respectively;

[0010] Hanging rope jacks provided on both sides of the shell are connected to the GPIO detection pin of the label chip;

[0011] The label holder comprises:

[0012] A label holder shell, the top of which is provided with a label holder magnet opposite in polarity to the label magnet;

[0013] A label holder spring needle elastically pressed on the top of the shell and corresponding to the position of the label contact;

[0014] A management board electrically connected to the spring needle and internally provided with a unique hardware identification code;

[0015] An indicator light provided on the surface of the shell and controlled by the management board;

[0016] The anti-disassembly hanging rope comprises a conductive core, and the terminal head of the conductive core and the hanging rope jack form an irreversible insertion structure.

[0017] Preferably, the label chip is internally provided with an RC4 encryption algorithm module and comprises a non-readable and non-writable OTP storage area for storing an encryption key;

[0018] The label contact comprises four metal contacts, respectively defined as VCC, GND, SDA and SCL pins, and forms an I 2 C communication loop after being pressed against the label holder spring needle.

[0019] Preferably, the terminal head of the anti-disassembly hanging rope is provided with an annular groove, and the hanging rope jack is internally provided with a barb structure composed of spring steel sheets, and the barb is embedded in the groove after insertion to form mechanical interlocking;

[0020] The conductive core is a plurality of silver-plated copper wires, and the breaking threshold is ≤5N.

[0021] Preferably, the management board comprises the following component connection relationship:

[0022] Master control chip: a 32-bit microcontroller supporting I 2 C communication, the I 2 C1 interface of which is connected to the SDA / SCL input end of the TCA9548A chip through PCB wiring;

[0023] I 2 C extension chip: the 8-way output channel of the TCA9548A is connected to the SDA / SCL contacts of 8 groups of label holder spring needles, respectively, to form 8 independent communication channels;

[0024] Indicator light driving circuit: the PD0 and PD2 pins of the master control chip control the PWM driving signal output of the 8-way LED indicator light through the address lines A0 and A2 of the 74HC4051M multiplexer;

[0025] Hardware ID setting module: one pin of 8-bit dial switch (SW1) is connected to PE0-PE7 pins of the master control chip, and is connected to 3.3V power supply through a pull-up resistor, and the dial state is directly mapped to a binary hardware ID code;

[0026] Communication interface: the CAN_TX (PB9) and CAN_RX (PB10) pins of the master control chip are connected to the SN65HVD230 CAN transceiver to form a CAN bus communication loop.

[0027] Preferably, the management board communicates with the upper computer through the CAN bus interface, and the hardware ID serves as the CAN bus node identifier.

[0028] The single management board supports simultaneous control of greater than or equal to 8 tags, and the tag holder shell is designed as an 8-slot integrated structure.

[0029] The application also discloses an in-situ supervision method based on the kit, and the method comprises the following steps:

[0030] The plurality of tag holders are connected to the upper computer through the CAN bus, and the unique hardware ID of each tag holder is bound to the physical position.

[0031] Initial binding step:

[0032] The two ends of the anti-disassembly hanging rope are inserted into the hanging rope insertion hole of the tag to form a conductive loop, and the tag chip generates a random key and stores it in the OTP area.

[0033] The upper computer establishes a ternary binding relationship library of the tag ID, the carrier information and the key.

[0034] Real-time monitoring step:

[0035] The tag holder detects the electrical connection state of the tag contact at a frequency of 1Hz, and determines that the tag is off-site if the detection fails for three times in succession.

[0036] When the hanging rope loop is disconnected, the tag chip triggers a key erasing operation.

[0037] Preferably, the real-time monitoring step comprises:

[0038] The in-situ state determination needs to satisfy the following conditions simultaneously:

[0039] The tag ID is read through the I 2 C communication

[0040] The GPIO detection pin of the hanging rope insertion hole is at a low level.

[0041] The abnormal state includes:

[0042] Unauthorized off-site: the tag holder detects off-site when no access instruction is received;

[0043] Key authentication failure: RC4 encryption response value does not match the expected value.

[0044] Preferably, the access management step comprises:

[0045] The host computer sends an access instruction to the target tag holder, and the management board controls the indicator light of the corresponding slot to enter a green flashing mode.

[0046] After the user takes away the tag, the management board detects the off-site state and uploads the event log, which includes the timestamp, operator ID, and tag holder position code.

[0047] Preferably, the key management includes an encryption interaction process:

[0048] 1) The management board sends a random number to the tag chip; 2) The tag chip encrypts the random number using the OTP stored key through the RC4 algorithm; 3) The management board forwards the encryption result to the host computer for decryption verification.

[0049] Preferably, the exception handling includes: when the hanging rope loop is detected to be disconnected, the management board performs: 1) immediately upload exception alarm information to the host computer; 2) control the indicator light to switch to red constant light; 3) lock the corresponding tag holder slot to prevent new tags from being placed; until the manual reset instruction is received to release the lock state. Beneficial effects

[0050] (1) Adopting magnetic type wired communication design, communication is reliable and identification accuracy is high;

[0051] (2) Adopting anti-disassembly detection hanging rope design, avoiding the label being removed, leading to uncontrolled articles;

[0052] (3) Can accurately locate the managed carrier, combined with the base indicator light, can realize efficient management;

[0053] (4) Can realize information security transmission combined with authentication and encryption technology; BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 It is a schematic diagram of the composition and use of the magnetic type label management kit;

[0055] Figure 2 It is a key design principle diagram of the magnetic type label management kit;

[0056] Figure 3 It is a schematic diagram of the in-situ monitoring method of the carrier of the magnetic type label. DETAILED DESCRIPTION Example 1

[0057] A magnetic label management kit, comprising a label (1), a label holder (2), and a tamper-proof hanging rope (3), characterized in that: the label (1) comprises a label shell (101), a label magnet (102), a label contact (103), a label chip (104), and a hanging rope insertion hole (105), the label contact and the hanging rope insertion hole are connected with the label chip pin to provide power supply, communication, and tamper detection functions; the label holder (2) comprises a label holder shell (201), a label holder spring needle (202), a label holder magnet (203), a label holder indicator (204), and a management board (205), the label holder is attracted to the label (1) by the label holder magnet (203) and is electrically connected by the label holder spring needle (202) and the label contact (103) crimping, or is attracted by the label holder magnet and an iron sheet, the management board can be separated or a single board can support the management of multiple labels according to actual conditions, and the management board has identification and networking capabilities; the tamper-proof hanging rope (3) has a conductive ability, the head structure cooperates with the label hanging rope insertion hole (105) to realize a pull-out prevention structure.

[0058] As shown in Figure 2 the hanging rope insertion hole (105) is internally provided with a spring steel sheet composed of a barb structure, and after the hanging rope terminal head is inserted, the annular groove and the barb form a mechanical interlock. The conductive core body adopts a plurality of silver-plated copper wires, and the breaking threshold is set to 5N tension.

[0059] The kit is mainly applied to the USB KEY management scene, but is not limited to the scene. The working principle is that the tag (1) is attracted to the tag seat (2) by the tag magnet (102), the tag contact (103) is pressure-welded with the contact pin (202) of the tag seat (2) to realize electrical connection, after connection, the tag seat can supply power for the tag chip, communicate with the tag chip, thereby realizing ID and in-place state information reading function; the tag chip is preferably an STM32L072 low-power series, the management board main control chip is preferably an STM32F4 high-performance series, and the two communicate through an I2C bus compatible communication; the OTP storage area of the tag chip is written with a 256-bit random key during initialization, the key generation adopts a true random number generator (TRNG) module, a 256-bit entropy value is generated by collecting internal noise signals, and after SHA-256 hash processing, the 256-bit entropy value is written into the OTP area. The management board transmits the key by encrypting it through the RSA-OAEP algorithm, and the key life cycle management conforms to the FIPS 140-2 standard. The key is transmitted to the management board (205) after being encrypted by the upper computer using RSA2048, and is stored in the secure storage area of the encryption chip after being decrypted by the management board. Each time the tag is identified, the management board sends a random number challenge, and the tag chip returns a response value after encryption calculation using the stored key; the anti-disassembly hanging rope (3) realizes anti-disassembly detection through an electrical circuit detection mode, and cooperates with the tag structure to realize anti-pulling-out design. If forcibly disassembled, the detection circuit is disconnected and cannot be restored, and the tag is disabled. To ensure the safety of interactive information, an encryption method can be selected to interact information to ensure the safety of the tag (1) information. The management board (205) of the tag seat (2) has a unique identifier and networking capability, can build a tag management network, and form a management system in combination with the upper computer and the upper computer software, and realize centralized supervision of multiple carriers.

[0060] Key security management: the tag chip integrates a hardware encryption engine, generates a physical noise source through an internal ring oscillator at power-on, and generates original entropy data through ADC sampling. After the entropy pool is full, the health test of SP800-90B standard is triggered, qualified data is input into the CRYPT library for entropy extraction, and finally the true random number meeting the AIS-31 standard is output. The generated 256-bit seed key is calculated by the hardware encryption engine SHA-256 digest, and then written into the OTP storage area by laser fusing.

[0061] The core component of the tag is the tag chip, which has a built-in processor supporting bus communication, GPIO input detection and RC4 encryption algorithm. The tag contact connects the power supply and communication interface of the tag chip, realizes the power supply and communication connection of the tag seat. The hanging rope jack connects the GPIO input detection pin of the tag chip, realizes the hanging rope state detection through on-off detection. The magnet realizes the adsorption function with the tag base, and the tag shell realizes the structure supporting function of various components.

[0062] The core component of the label seat is the management board, which is electrically connected with the spring needle, for providing power supply and communication for the label. The management board is also connected with the indicator light of the label seat for state indication. The magnet of the label seat is used to realize the mutual attraction with the magnet of the label. The shell of the label seat is used to support the components of the label seat, and provide structural support and limiting for the label attached thereon.

[0063] The label and the label seat are attached by the principle of magnetic attraction of opposite poles. The label contact and the spring needle of the label seat are electrically connected by the pressure contact of the magnetic attraction. After the connection, the management board in the label seat can communicate with the chip in the label, so as to realize the ID and the state information reading function of the hanging rope. The communication mode can be implemented by single bus, I 2 C or other bus. The label seat can be realized in the form of multiple slots, supporting simultaneous monitoring of multiple labels and control of multiple carriers. The management board of the label seat supports networking function, and can support centralized control of multiple labels. When multiple labels are managed, the I 2 C channel is switched in sequence by the channel selection function of the TCA9548A chip for polling detection. The I2C address of each label is set to a unique value by hardware dial code, and the address allocation strategy adopts binary coding mode.

[0064] The anti-disassembly hanging rope has conductive capacity, and the anti-disassembly detection is realized by loop detection. The anti-disassembly hanging rope and the label adopt a structure which is inserted once and cannot be pulled out. After forced destruction, the detection loop is disconnected, and the label is disabled.

[0065] The label ID can be protected by encryption to realize information security and prevent eavesdropping. The built-in chip of the label supports RC4 encryption algorithm (including but not limited to the algorithm). The algorithm secret key is written at the time of label issuance and cannot be read out. The data read by the label seat is encrypted data, which needs to be decrypted by the same secret key to restore. The secret key of the label seat is obtained by the upper computer. Embodiment 2

[0066] The in-situ supervision method of the carrier using the magnetic attraction type label described in embodiment 1 comprises the following steps:

[0067] The construction of the carrier supervision system: according to the networking function of the magnetic attraction type label control kit, multiple magnetic attraction type label control kits and the upper computer can be connected to the same network. The specific form of the network is not limited, which can be CAN bus, Ethernet and the like. Each magnetic attraction type label seat has a unique identification. The upper computer software can uniquely determine the position of the label, and can communicate with any specific label seat management board, can read the ID information of the label at all positions, and can control the state of the indicator light on the label seat by sending a command to the management board.

[0068] Initial binding: prevent the disassembly of the hanging rope through the rope hole of the managed object, and then insert the two ends of the hanging rope into the two insertion holes of the label to realize the binding of the label and the managed carrier. The label ID and the managed carrier information are recorded in the database in the upper computer software with the carrier unique number as the index to realize binding. The usual carrier information includes carrier number, carrier name, unit, keeper, etc. If information security is required, the encryption key is also written into the label. Place the label on the label seat and wait for the label seat to report the information to the upper computer software to confirm whether the label is a valid label after binding. If it is a valid label, update the in-place state and record the unique identification of the current label seat. If it is not a valid label, it is not processed.

[0069] Real-time monitoring: After initial binding, the label ID, carrier information and label seat form an associated record in the database. The label seat periodically detects whether the label exists and can read the ID information. It can be normally detected to exist and can correctly read the ID information to determine the in-place state. When it cannot be detected to exist or cannot correctly read the ID information for more than 3 times in a row, it is determined to be off-site. The detection period of the label seat is 1 time per second. If the real-time requirement is higher, the detection period can be shortened. When the state changes, the label seat will immediately upload the change to the upper computer. The upper computer software can collect the in-place and off-site states of all labels in real time. Through the binding relationship between the label and the carrier in the database, the in-place and off-site states of the carrier can be obtained, and the in-place and off-site states of the carrier can be obtained. In the interface, it is displayed in the form of statistical data, list, etc.

[0070] Access management: When a specific carrier needs to be accessed, select the specific carrier in the upper computer software, and find the corresponding label seat in the database through the carrier to issue an access instruction. The label seat shows the location of the accessible carrier to the user through the green flashing of the indicator light (convenient for the user to find) and marks it as an access state. When the user takes away the carrier together with the label, the label seat management board detects that the label is off-site, the indicator light returns to normal, and the change is reported to the upper computer software to update the latest state.

[0071] Return management: When returning, directly put the carrier together with the label into the idle label seat. The label seat detects the label based on the periodic detection mechanism and reads the label ID. Then, the ID information, the identification of the label seat and the in-place state information are reported to the upper computer software. The upper computer software updates the display interface according to the reported information and records the information, and the return process is completed.

[0072] Abnormal alarm determination: when the carrier and the tag's hanging rope connection is destroyed, the tag holder control board recognizes the abnormal state of the hanging rope, reports the abnormality to the upper computer software, and the upper computer software marks the carrier as abnormal and pops up a prompt on the interface. When the tag holder does not receive the taking instruction, the corresponding tag is detected to be off the position, the indicator light of the tag holder will indicate the red alarm state, and at the same time, the alarm information is uploaded to the upper computer software for display and recording, prompting the staff to handle. The staff needs to manually enter the reason to handle the alarm, and after handling, the alarm prompt will no longer pop up, but the alarm record and handling reason record will be retained in the database for reference. Example 3

[0073] The specific implementation case of the magnetic type tag control kit is as follows:

[0074] In order to reduce power consumption and size, the core chip of the tag is an 8-pin STM32C0 series chip. Two GPIOs are used to realize hanging rope detection, one output signal and one input detection. The tag contact is designed as four, which are welded on a small PCB with the tag chip, one contact for power supply, one contact for GND, and two contacts for I2C communication. The hanging rope jack is made of metal conductive material and connected with two GPIOs, and the jack is designed with a barb structure. Once the terminal head of the hanging rope is inserted, it cannot be pulled out, and forcibly pulling it out will damage the structure and cannot be restored.

[0075] In view of the centralized control scene of usually multiple carriers, the tag holder is designed as an 8-channel form. The management board uses a high-speed MCU combined with an I 2 C bus expansion chip TCA9548A to realize 8-way I 2 C channel, which is respectively used for communication with 8 tags, and a GPIO multiplexing chip 74HC4051M is used to realize the control of 8-channel indicator lights. Each management board card realizes a unique ID through an 8-bit dial switch, and uses a CAN bus interface to communicate with the upper computer, and the unique ID is used as the CAN bus ID value, which is convenient for networking identification between more kits. Through this design, the management ability of a single system to multiple tags can be realized, which fully meets the management needs of users.

[0076] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A magnetic label management kit, comprising: Label, label holder, anti-disassembly hanging rope; characterized in that The label comprises: A label shell with a label magnet embedded at the bottom; A label contact provided at the bottom of the shell flush with the bottom surface of the shell; A label chip provided inside the shell, with a power supply pin and a communication pin connected to the label contact, respectively; A hanging rope jack provided at both sides of the shell, connected to the GPIO detection pin of the label chip; The label holder comprises: A label holder shell with a label holder magnet of opposite polarity to the label magnet provided at the top; A label holder spring needle elastically pressed at the top of the shell, corresponding to the position of the label contact; A management board electrically connected to the spring needle and internally provided with a unique hardware identification code; An indicator light provided on the surface of the shell and controlled by the management board; The anti-disassembly hanging rope comprises a conductive core, and the terminal head of the conductive core and the hanging rope jack form an irreversible insertion structure.

2. The control kit according to claim 1, characterized in that: The label chip is internally provided with an encryption algorithm module and contains an OTP storage area that cannot be read and written for storing an encryption key; The tag contact includes 4 metal contacts, defined as VCC, GND, SDA, SCL pins respectively, which form I 2 C communication circuit.

3. The control kit according to claim 1, characterized in that: The terminal head of the anti-disassembly hanging rope is provided with an annular groove, and the hanging rope jack is provided with a barb structure composed of spring steel sheets, and after insertion, the barb is embedded in the groove to form a mechanical interlock; The conductive core is a plurality of silver-plated copper wires, and the breaking threshold is ≤5N.

4. The control kit according to claim 1, characterized in that: The management board comprises the following component connection relationship: Master chip: adopt support I 2 C bus communication 32-bit microcontroller, its I 2 C1 interface is connected to the SDA / SCL input end of TCA9548A chip through PCB wiring; I 2 C extension chip: 8-way output channel of TCA9548A is connected with SDA / SCL contact of 8 groups of tag holder spring needle respectively, forming 8 independent communication channels; Indicator light driving circuit: the PD0PD2 pins of the main control chip control the PWM driving signal output of the 8-way LED indicator light through the address of the 74HC4051M multiplexer; Hardware ID setting module: one pin of the 8-bit dial switch SW1 is connected to the PE0PE7 pins of the main control chip, and is connected to the 3.3V power supply through a pull-up resistor, and the dial state is directly mapped to a binary hardware ID code; Communication interface: the CAN_TX (PB9), CAN_RX (PB10) pins of the main control chip are connected to the SN65HVD230 CAN transceiver to form a CAN bus communication loop.

5. The control kit according to claim 4, characterized in that: The management board communicates with the upper computer through the CAN bus interface, and the hardware ID serves as the CAN bus node identification; The management board supports simultaneous control of ≥8 labels, and the label holder shell is designed as an 8-slot integrated structure.

6. A method of in situ monitoring based on the kit of any one of claims 1-5, characterized in that, Including: System networking steps: Connect multiple label holders to the upper computer through the CAN bus, and bind the unique hardware ID of each label holder to the physical location; Initial binding steps: Insert the anti-disassembly hanging rope into the hanging rope jack of the label to form a conductive loop, and the label chip generates a random key and stores it in the OTP area; The upper computer establishes a three-element binding relationship library of label ID, carrier information, and key; Real-time monitoring steps: The label holder detects the electrical connection state of the label contact at a frequency of 1Hz, and determines that it is off-site if it fails to detect for three consecutive times; When the hanging rope loop is disconnected, the label chip triggers a key erasing operation.

7. The method of claim 6, wherein, The real-time monitoring steps comprise: The on-site state determination needs to meet the following conditions simultaneously: the tag ID is readable through I 2 C communication; the GPIO detection pin of the hanging rope jack is at low level; Abnormal states include: unauthorized off-site: off-site detected when the tag holder did not receive access instructions; Key authentication failure: RC4 encryption response value does not match expectations.

8. The method of claim 7, wherein: The host computer sends an access instruction to the target tag holder, and the management board controls the indicator light of the corresponding slot to enter the green flashing mode. After the user takes away the label, the management board detects the off-site state and uploads the event log, which includes the timestamp, operator ID, and tag holder position code.

9. The method of claim 6, wherein, Key management includes: 1) The management board sends a random number to the tag chip; 2) The tag chip encrypts the random number using the OTP stored key through the RC4 algorithm; 3) The management board forwards the encryption result to the host computer for decryption verification.

10. The method of claim 7, characterized in that: When the hanging rope loop is detected to be disconnected, the management board performs: 1) Immediately upload abnormal alarm information to the host computer; 2) Control the indicator light to switch to red constant light; 3) Cut off the VCC power supply loop of the spring needle by driving the MOSFET switch to achieve physical locking; until the manual reset instruction is received, the power supply loop is closed again.

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