A passive RFID electronic seal based on a gear structure

Abstract

This utility model discloses a passive RFID electronic seal based on a gear structure, including a housing. Inside the housing are a sensing gear and a reading gear. A transmitting circuit board is positioned between the reading gear and the bottom of the housing. A light emitter is mounted on the transmitting circuit board below the reading gear. A receiving circuit board, placed inside the housing, is also positioned above the reading gear. A charging coil for acquiring power supply current is mounted on the receiving circuit board. The unidirectional rotation of the gear structure determines the seal's tampering status, achieving fully mechanical passive tampering detection. The seal is passive; the charging coil captures the current from the reader's operation of the NFC chip to power the entire system. The battery-free design significantly reduces operating costs. It supports reset and data reset, and its cycle life far exceeds that of traditional electronic seals.

Description

Technical Field

[0001] This utility model relates to the field of electronic signature seals, specifically to a passive RFID electronic signature seal based on a gear structure. Background Technology

[0002] An electronic seal is a self-locking, tamper-evident, disposable plastic-shell seal featuring a barcode, QR code, or RFID chip. Each seal has a unique code, including a barcode or QR code for smart handheld terminals, an RFID chip, and a digital code. Electronic seals utilize contactless automatic identification technology; the reader automatically identifies the target, acquires relevant data, and intelligently reads, writes, and interacts with the data, enabling computer software management. The digital ID of the electronic seal label is globally unique, and the sealing and unsealing process is managed through an RFID reader, ensuring the safety of logistics and transportation.

[0003] Existing electronic seals have limited battery capacity and can only be reused a limited number of times. The built-in battery also makes them less safe and unsuitable for use in fire-proof and explosion-proof environments. In case of abnormal collisions or vibrations, the battery may be damaged and leak, posing a safety hazard. The seal may also experience abnormal power supply in some high-temperature / low-temperature / humid environments, ultimately leading to functional failure. In addition, they are costly and have many problems.

[0004] Accordingly, this utility model proposes a passive RFID electronic seal based on a gear structure to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a passive RFID electronic seal based on a gear structure. The unidirectional rotation of the gear structure is used to determine the degree of tampering of the seal, achieving mechanical passive tampering detection throughout the entire process. The seal is passive, and the charging coil captures the current of the reader operating the NFC chip to power the entire system. The battery-free design greatly reduces the cost of use, supports reset and data reset, and has a cycle life far exceeding that of traditional electronic seals.

[0006] Technical solution

[0007] A passive RFID electronic seal based on a gear structure includes a housing. Inside the housing are a sensing gear and a reading gear. A transmitting circuit board is positioned between the reading gear and the bottom of the housing. A light transmitter is mounted on the transmitting circuit board below the reading gear. A receiving circuit board, placed inside the housing, is positioned above the reading gear. The receiving circuit board has a charging coil for acquiring power supply current and an NFC chip for data communication with a reader / writer. A light sensor is also positioned on the side of the receiving circuit board closest to the reading gear. A light path slot for adjusting light flux is passed through the reading gear. The light transmitter transmits light through the light path slot to the light sensor and is received.

[0008] Furthermore, the two readout gears are a first readout gear and a second readout gear, and the first readout gear and the second readout gear are provided with the optical path groove.

[0009] Furthermore, a first fixing post is fixed inside the housing, and the sensing gear is rotatably mounted on the first fixing post. Two through holes are penetrating the transmitting circuit board. A second fixing post and a third fixing post passing through one of the through holes are also provided inside the housing. A second reading gear is rotatably mounted on the third fixing post. An axle is fixedly mounted on the first reading gear and rotatably connected to the other through hole. A transmission gear that meshes with the second reading gear is also fixedly mounted on the axle.

[0010] Furthermore, a gear lever is rotatably connected through the second fixed column, and the gear lever is located between the sensing gear and the first readout gear.

[0011] Furthermore, the housing is also rotatably provided with a backstop for unidirectional rotation of the sensing gear.

[0012] Furthermore, a fixing strap insertion port is provided on the housing near the sensing gear.

[0013] Furthermore, the transmitting circuit board is also equipped with an energy storage capacitor.

[0014] Furthermore, the receiving circuit board is also equipped with an NFC interaction coil for communicating with the reader / writer.

[0015] Furthermore, the receiving circuit board is also equipped with a main control chip and a rectifier circuit.

[0016] Furthermore, the receiving circuit board and the transmitting circuit board are connected by wires.

[0017] Furthermore, the charging coil acquires the radio frequency energy of the reader and charges the energy storage capacitor through the rectifier circuit on the receiving circuit board to power the entire circuit.

[0018] Beneficial effects

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] The unidirectional rotation of the gear structure is used to determine the degree of tampering of the seal, achieving a fully mechanical passive tampering detection process. The seal is passive, and the charging coil captures the current of the reader operating the NFC chip to power the entire system. The battery-free design greatly reduces the cost of use, supports reset and data reset, and has a cycle life far exceeding that of traditional electronic seals. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a passive RFID electronic seal based on a gear structure according to the present invention.

[0022] Attached icon number

[0023] 1. Housing; 2. Light emitter; 3. First readout gear; 4. Fixing strap connector; 5. Gear lever; 6. Sensing gear; 7. Receiving circuit board; 8. NFC chip; 9. Charging coil; 10. NFC interaction coil; 11. Energy storage capacitor; 12. Transmitting circuit board; 13. First fixing post; 14. Second fixing post; 15. Third fixing post; 16. Optical path through slot; 17. Return lock; 18. Through hole; 19. Second readout gear; 20. Transmission gear; 21. Transmission gear. Detailed Implementation

[0024] To better illustrate the content of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments:

[0025] have Figure 1 As shown, this utility model discloses a passive RFID electronic seal based on a gear structure, including a housing 1. Inside the housing 1, a sensing gear 6 and two reading gears are arranged. A transmitting circuit board 12 is disposed between the reading gears and the bottom of the housing 1. A light transmitter 2 is mounted on the transmitting circuit board 12, located below the reading gears. A receiving circuit board 7, placed inside the housing 1, is also disposed above the reading gears. The receiving circuit board 7 has a charging coil 9 for acquiring power supply current and an NFC chip 8 for data interaction and communication with a reader / writer. A light sensor is also disposed on the side of the receiving circuit board 7 near the reading gears. A light path slot 16, capable of adjusting light flux, passes through the reading gears. The light transmitter 2 transmits light to the light sensor through the light path slot 16 and is received.

[0026] Furthermore, the reading gear includes a first reading gear 3 and a second reading gear 19, and the first reading gear 3 and the second reading gear 19 are provided with the optical path groove 16.

[0027] Furthermore, a first fixing post 13 is fixedly provided inside the outer casing 1, and the sensing gear 6 is rotatably mounted on the first fixing post 13. Two through holes 18 are penetrating the transmitting circuit board 12. A second fixing post 14 and a third fixing post 15 passing through one of the through holes 18 are also provided inside the outer casing 1. A second reading gear 19 is rotatably mounted on the third fixing post 15. A wheel axle 20 is fixedly mounted on the first reading gear 3 and is rotatably connected to the other through hole 18. A transmission gear 21 that meshes with the second reading gear 19 is also fixedly mounted on the wheel axle 20.

[0028] Furthermore, a gear lever 5 is rotatably connected through the second fixed column 14. The gear lever 5 is located between the sensing gear 6 and the first reading gear 3 and is used to transmit the action of the sensing gear 6 to the first reading gear 3.

[0029] Furthermore, the outer casing 1 is also rotatably provided with a return buckle 17 for unidirectional rotation of the sensing gear 6 to prevent the fixing belt from being pulled out.

[0030] Furthermore, a fixing strap insertion port 4 is provided on the outer casing 1 near the sensing gear 6.

[0031] Furthermore, the transmitting circuit board 12 is also provided with an energy storage capacitor 11.

[0032] Furthermore, the receiving circuit board 7 is also provided with an NFC interactive coil 10 for communicating with the reader / writer.

[0033] Furthermore, the receiving circuit board 7 is also equipped with a main control chip and a rectifier circuit.

[0034] Furthermore, the receiving circuit board 7 and the transmitting circuit board 12 are connected by wires.

[0035] Furthermore, the charging coil 9 acquires the radio frequency energy of the reader and charges the energy storage capacitor 11 through the rectifier circuit on the receiving circuit board 7 to power the entire circuit.

[0036] Specifically, when the fixing strap is inserted into the seal through the fixing strap insertion port 4, the rack and pinion structure on the fixing strap drives the sensing gear 6 to rotate. The gear lever 5 acts as a linkage mechanism to synchronously and unidirectionally drive the two reading gears to rotate, thereby changing the relative position of the optical path slot and achieving precise adjustment of the light flux.

[0037] During the status verification phase, the reader sends radio frequency energy to the seal. The charging coil 9 transmits the captured electromagnetic energy to the receiving circuit board 7. After being converted into DC power by the full-bridge rectifier circuit, it powers the circuit board and charges the energy storage capacitor 11 quickly to ensure power supply stability during the detection process. When the reader sends an NFC message, the NFC interaction coil 10 of the NFC chip 8 receives this information and transmits it to the internal control chip for processing. The control chip then issues a command to start the light emitter 2. The light passes through the light path slot 16 and illuminates the light sensor on the other side. The light sensor detects the change in light intensity and transmits the signal back to the control chip. The control chip calculates the rotation position of the gear based on these changes and finally sends the result back to the NFC chip 8. The external reader can directly read the current rotation state of the gear and determine the working status.

[0038] The entire process of detecting seal tampering is achieved by using the unidirectional rotation of gears. If tampering occurs during the use of the seal, even if the original fixing band is removed and a new fixing band is inserted, the original tampering state cannot be restored. Through this mechanical structure, no power supply is required to achieve the same tampering detection effect as active seals, while being lower in cost, longer in life, and applicable to a wider range of fields.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A passive RFID electronic seal based on a gear structure, characterized in that, include: The sensing gear (6) meshes with the rack structure on the sealing tape, and the insertion and removal of the sealing tape drives the sensing gear (6) to rotate. The reading gear is driven to rotate in one direction by the sensing gear (6) and realize the change of light flux. The light flux reflects whether the seal fixing tape has been broken. An optical path groove (16) is disposed through the readout gear, and the rotation of the readout gear can change the position of the optical path groove (16); A light emitter (2) is disposed on one side of the optical path through slot (16); An optical sensor is disposed on the other side of the optical path slot (16); The charging coil (9) captures radio frequency energy from the reader for power supply; The NFC chip (8) interacts with the reader / writer for data exchange.

2. The passive RFID electronic seal based on a gear structure according to claim 1, characterized in that: It also includes a housing (1), inside which the sensing gear (6) and the reading gear are disposed. A transmitting circuit board (12) is disposed between the reading gear and the bottom of the housing (1). The transmitting circuit board (12) is equipped with the light emitter (2) located below the reading gear. A receiving circuit board (7) placed inside the housing (1) is also disposed on the upper side of the reading gear. A charging coil (9) for acquiring power supply current is disposed on the receiving circuit board (7). An NFC chip (8) for data interaction communication with the reader is also disposed on the receiving circuit board (7). A light sensor is also disposed on the side of the receiving circuit board (7) near the reading gear. A light path slot (16) for adjusting light flux is passed through the reading gear. The light emitter (2) is emitted to the light sensor through the light path slot (16) and received.

3. The passive RFID electronic seal based on a gear structure according to claim 2, characterized in that: The housing (1) is also rotatably provided with a return lock (17) for unidirectional rotation of the sensing gear (6).

4. The passive RFID electronic seal based on a gear structure according to claim 3, characterized in that: The readout gears include a first readout gear (3) and a second readout gear (19). The first readout gear (3) and the second readout gear (19) are perforated by the optical path groove (16). A first fixing post (13) is fixed inside the housing (1). The sensing gear (6) is rotatably mounted on the first fixing post (13). Two through holes (18) are perforated on the transmitting circuit board (12). A second fixing post (14) and a third fixing post (18) are also provided inside the housing (1). The third fixed column (15) is also rotatably provided with the second reading gear (19). The first reading gear (3) is fixedly provided with a wheel axle (20) that passes through and is rotatably connected to another through hole (18). The wheel axle (20) is also fixedly provided with a transmission gear (21) that meshes with the second reading gear (19). The second fixed column (14) is rotatably connected with a gear lever (5). The gear lever (5) is located between the sensing gear (6) and the first reading gear (3).

5. A passive RFID electronic seal based on a gear structure according to claim 4, characterized in that: A fixing slot (4) is provided on the outer casing (1) near the sensing gear (6).

6. A passive RFID electronic seal based on a gear structure according to claim 5, characterized in that: The transmitting circuit board (12) is also provided with an energy storage capacitor (11).

7. A passive RFID electronic seal based on a gear structure according to claim 6, characterized in that: The receiving circuit board (7) is also provided with an NFC interactive coil (10) for communicating with the reader / writer.

8. A passive RFID electronic seal based on a gear structure according to claim 7, characterized in that: The receiving circuit board (7) is also equipped with a main control chip and a rectifier circuit.

9. A passive RFID electronic seal based on a gear structure according to claim 8, characterized in that: The receiving circuit board (7) and the transmitting circuit board (12) are connected by wires.

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