RFID tag with on-off detection function

Abstract

The utility model relates to RFID label technical field, concretely is a kind of RFID label with on-off detection function, including substrate, antenna and chip being set on substrate, the antenna includes main radiating section and disconnectable auxiliary radiating section, the auxiliary radiating section is connected with main radiating section by mechanical switch unit;The utility model is through the synergic effect of magnetron mechanical switch unit and antenna impedance change, realizes the on-off detection of passive, sensorless, solves the cost high, complex structure problem caused by the dependence of prior art on external sensor or additional power supply, simultaneously through the real-time association of nonvolatile storage area in chip and on-off state, the persistent record and remote wireless reading of on-off event are realized, avoid the defect that state information is easily lost in prior art, cannot trace back history operation.

Description

Technical Field

[0001] This utility model relates to the field of RFID tag technology, specifically to an RFID tag with continuity detection function. Background Technology

[0002] In scenarios such as logistics tracking, equipment status monitoring, and security management, the physical connectivity of items (e.g., packaging integrity, equipment start / stop, and circuit connectivity) directly impacts management efficiency and reliability. While traditional tags can identify items, they cannot provide real-time feedback on dynamic status changes. Manual inspections or the deployment of external sensors are costly and difficult to scale. Therefore, an RFID tag with connectivity detection capabilities is needed to autonomously sense and record physical connectivity events via radio frequency signals, meeting the requirements for comprehensive, automated, and traceable intelligent management.

[0003] Currently available RFID tags with continuity detection function usually need to integrate pressure sensors or battery modules, resulting in large tag size, high cost and difficult maintenance. Furthermore, traditional tags cannot save continuity records after power failure, making it difficult to meet the long-term traceability needs of scenarios such as logistics tracking and anti-tampering. Utility Model Content

[0004] The purpose of this invention is to provide an RFID tag with continuity detection function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An RFID tag with on / off detection function includes a substrate, an antenna and a chip disposed on the substrate, wherein the antenna includes a main radiating section and a disconnectable secondary radiating section, and the secondary radiating section is connected to the main radiating section through a mechanical switching unit.

[0007] The mechanical switch unit includes an insulating base, a first conductive contact and a second conductive contact fixed on the insulating base, wherein the first conductive contact is electrically connected to the main radiating section and the second conductive contact is electrically connected to the secondary radiating section.

[0008] When the mechanical switch unit is in the ON state, the first conductive contact is in contact with the second conductive contact;

[0009] When the mechanical switch unit is in the open state, the first conductive contact separates from the second conductive contact.

[0010] Preferably, the main radiating section is made of copper foil, aluminum foil, or an etched metal conductive layer with a thickness of 10-50 μm.

[0011] Preferably, the secondary radiating segment is made of a flexible conductive material, and its length is less than 1 / 3 of the length of the main radiating segment.

[0012] Preferably, a magnetic material layer is provided between the first conductive contact and the second conductive contact of the mechanical switch unit, and the thickness of the magnetic material layer is 0.1-0.5 mm.

[0013] Preferably, the non-volatile memory of the chip is provided with a status flag storage area, which is associated with the on / off state of the mechanical switching unit.

[0014] Preferably, the substrate is made of PET material, and its surface is covered with a moisture-proof coating, which is made of polyurethane.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This RFID tag with continuity detection function achieves passive and sensorless continuity detection through the synergistic effect of magnetically controlled mechanical switching unit and antenna impedance change, solving the problems of high cost and complex structure caused by existing technologies that rely on external sensors or additional power supplies.

[0017] 2. This RFID tag with on / off detection function achieves persistent recording and remote wireless reading of on / off events by real-time association between the non-volatile storage area within the chip and the on / off state, avoiding the defects of easy loss of status information and inability to trace historical operations in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the antenna structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the mechanical switch unit of this utility model;

[0021] Figure 4 This is a planar schematic diagram of the chip of this utility model.

[0022] In the figure: 1. Substrate; 11. Moisture-proof coating; 2. Antenna; 21. Main radiating section; 22. Sub-radiating section; 3. Chip; 31. Status flag storage area; 4. Mechanical switch unit; 41. Insulating base; 42. First conductive contact; 43. Second conductive contact; 44. Magnetic material layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0025] An RFID tag with on / off detection function includes a substrate 1, an antenna 2 and a chip 3 disposed on the substrate 1. The antenna 2 includes a main radiating section 21 and a disconnectable secondary radiating section 22. The secondary radiating section 22 is connected to the main radiating section 21 through a mechanical switching unit 4.

[0026] The mechanical switch unit 4 includes an insulating base 41, a first conductive contact 42 and a second conductive contact 43 fixed on the insulating base 41. The first conductive contact 42 is electrically connected to the main radiating section 21, and the second conductive contact 43 is electrically connected to the secondary radiating section 22.

[0027] When the mechanical switch unit 4 is in the conducting state, the first conductive contact 42 is in contact with the second conductive contact 43;

[0028] When the mechanical switch unit 4 is in the open state, the first conductive contact 42 and the second conductive contact 43 are separated.

[0029] The above scheme achieves physical support and fixation of the antenna, chip, and mechanical switching unit by using the substrate as a carrier structure; the antenna system composed of the main radiating section and the disconnectable sub-radiating section can realize the function of transmitting and receiving radio frequency signals; the selective conduction or disconnection of the main and sub-radiating sections by the mechanical switching unit can achieve the effect of changing the antenna impedance; the separation or contact between the first conductive contact and the second conductive contact can generate the physical switching effect of the on and off states.

[0030] In this embodiment, preferably, the main radiating segment 21 is made of copper foil, aluminum foil, or an etched metal conductive layer with a thickness of 10-50 μm.

[0031] By using copper foil, aluminum foil, or etched metal conductive layers as materials for the main radiating section, efficient radio frequency signal transmission and low-loss energy transmission can be achieved. By limiting the thickness of the main radiating section to 10 to 50 micrometers, a balance between mechanical strength and flexible conformal properties can be achieved, avoiding breakage due to excessive thinness or increased rigidity due to excessive thickness.

[0032] In this embodiment, preferably, the secondary radiating segment 22 is made of a flexible conductive material, and its length is less than 1 / 3 of the length of the main radiating segment 21.

[0033] The above solution utilizes a flexible conductive material for the sub-radiating section, achieving durability that prevents breakage even after repeated bending. By limiting the length of the sub-radiating section to less than one-third of the length of the main radiating section, precise control over the overall antenna impedance can be achieved, ensuring that the impedance change during switching meets the reader's detection requirements.

[0034] In this embodiment, preferably, a magnetic material layer 44 is provided between the first conductive contact 42 and the second conductive contact 43 of the mechanical switch unit 4, and the thickness of the magnetic material layer 44 is 0.1-0.5mm.

[0035] By using the above solution, a magnetic material layer can be set between the first and second conductive contacts of the mechanical switch unit, which can achieve rapid contact adsorption and conduction under external magnetic control. By limiting the thickness of the magnetic material layer to 0.1 to 0.5 mm, the optimal balance between magnetic adsorption force and contact spacing can be achieved, which ensures conduction stability and avoids reset difficulties caused by excessive magnetic force.

[0036] In this embodiment, preferably, the non-volatile memory of the chip 3 is provided with a status flag storage area 31, which is associated with the on / off state of the mechanical switch unit 4.

[0037] The above scheme enables the persistent recording of on / off states by setting a status flag storage area in the chip's non-volatile memory; by associating the status flag storage area with the on / off states of the mechanical switch unit, the reliability of tracing historical events can be achieved even after power failure.

[0038] In this embodiment, preferably, the substrate 1 is made of PET material, and its surface is covered with a moisture-proof coating 11, which is made of polyurethane material.

[0039] The above solution utilizes PET material for the substrate, which offers advantages in lightweight and low-cost processing. By covering the substrate surface with a moisture-proof coating, it can withstand humid environments and prevent moisture penetration that could lead to antenna performance degradation or contact oxidation.

[0040] In this embodiment, an RFID tag with on / off detection function operates based on the synergistic effect of the impedance change of antenna 2 and the magnetically controlled mechanical switch unit 4. An antenna 2 system, consisting of a main radiating section 21 (using 30μm copper foil to balance flexibility and RF performance) and a disconnectable secondary radiating section 22 (conductive silver paste), is mounted on the tag's substrate 1. These two sections are selectively switched on or off via the mechanical switch unit 4. The space between the first conductive contact 42 and the second conductive contact 43 inside the mechanical switch unit 4 is filled with a magnetic material layer 44 (such as ferrite; with a magnetic response time <0.5s at a thickness of 0.3mm). When an external magnet (with a permanent magnet built into the reader) approaches, the magnetic material... When the magnetic material layer 44 is magnetized, it generates an attractive force that brings the two contacts together, making the main radiating section 21 and the secondary radiating section 22 conductive. This reduces the overall impedance of the antenna 2. The reader identifies the conductive state by analyzing the intensity or phase shift of the backscattered signal. When the magnetic force is removed, the magnetic material layer 44 demagnetizes, and the contacts separate under the action of an elastic reset element. This elastic reset element is either the deformation recovery characteristic of the magnetic material layer 44 or an additional spring sheet. Therefore, after separation, the main and secondary radiating sections 22 disconnect, and the impedance of the antenna 2 returns to its initial high resistance value. Simultaneously, the non-volatile memory of the chip 3 writes the on / off state into the preset status flag storage area 31 through level detection, achieving persistent recording and remote wireless reading of on / off events. This design directly changes the structural parameters of the antenna 2 through the physical action of a magnetically controlled mechanical switch. Combined with the backscattering characteristics of the radio frequency signal and the storage logic of the chip 3, it forms a passive and reliable on / off detection mechanism.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An RFID tag with continuity detection function, comprising a substrate (1), an antenna (2) disposed on the substrate (1), and a chip (3), characterized in that: The antenna (2) includes a main radiating section (21) and a disconnectable sub-radiating section (22), wherein the sub-radiating section (22) is connected to the main radiating section (21) via a mechanical switching unit (4); The mechanical switch unit (4) includes an insulating base (41), a first conductive contact (42) and a second conductive contact (43) fixed on the insulating base (41). The first conductive contact (42) is electrically connected to the main radiating section (21), and the second conductive contact (43) is electrically connected to the secondary radiating section (22). When the mechanical switch unit (4) is in the conducting state, the first conductive contact (42) contacts the second conductive contact (43); When the mechanical switch unit (4) is in the open state, the first conductive contact (42) separates from the second conductive contact (43).

2. An RFID tag with continuity detection function according to claim 1, characterized in that: The main radiating section (21) is made of copper foil, aluminum foil or etched metal conductive layer, with a thickness of 10-50 μm.

3. An RFID tag with continuity detection function according to claim 1, characterized in that: The sub-radiating section (22) is made of flexible conductive material and its length is less than 1 / 3 of the length of the main radiating section (21).

4. An RFID tag with continuity detection function according to claim 1, characterized in that: A magnetic material layer (44) is provided between the first conductive contact (42) and the second conductive contact (43) of the mechanical switch unit (4), and the thickness of the magnetic material layer (44) is 0.1-0.5 mm.

5. An RFID tag with continuity detection function according to claim 1, characterized in that: The chip (3) has a status flag storage area (31) in its non-volatile memory, and the status flag storage area (31) is associated with the on / off state of the mechanical switch unit (4).

6. An RFID tag with continuity detection function according to claim 1, characterized in that: The substrate (1) is made of PET material and its surface is covered with a moisture-proof coating (11), which is made of polyurethane material.

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