Anti-interference electromagnetic shielding structure of RFID intelligent tool car or intelligent tool cabinet

Abstract

The utility model relates to the technical field of radio frequency identification, in particular to an anti-interference electromagnetic shielding structure of an RFID intelligent tool car or an intelligent tool cabinet. Comprising a back installation cavity and a front object containing cavity, a partition plate is arranged between the back installation cavity and the front object containing cavity, an antenna is installed in the front object containing cavity, a reader is installed in the back installation cavity, the reader penetrates through a wire passing hole in the partition plate through a feeder line to be connected with the antenna, and a metal tubular structure is installed at the wire passing hole. The metal tubular structure is used for forming electromagnetic shielding, a wave-absorbing coating is arranged on the inner wall of the metal tubular structure, the feeder line penetrates through the metal tubular structure to be connected with the antenna, and the wave-absorbing coating is used for absorbing electromagnetic waves leaked by the feeder line. The metal tubular structure and the wave-absorbing coating are matched to shield and absorb electromagnetic waves leaked by the feeder line, so that the potential safety hazard of feeder line signal leakage at the line passing hole is eliminated, the anti-interference electromagnetic shielding effect of the feeder line of the RFID system is realized, and the signal safety and stability of the system in a complex environment are remarkably improved.

Description

Technical Field:

[0001] The utility model relates to the technical field of radio frequency identification, in particular to an anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or an intelligent tool cabinet. Background Art:

[0002] At present, RFID technology is an automatic identification technology that conducts non-contact two-way data communication with media such as electronic tags through electromagnetic waves. This technology has been widely used because of its ability to provide efficient data capture and wireless communication capabilities, especially in devices such as intelligent tool carts and intelligent tool cabinets. For example, the patent application with the publication number CN218052546U discloses an intelligent tool cabinet based on RFID technology, which mainly includes an electronic tag, a reader, an antenna, and related feeder lines. As an important information transmission and data management tool, the stability and security of the RFID system are crucial for the entire system. The feeder line, as an important part connecting the reader and the antenna, directly affects the stability and efficiency of the entire RFID system.

[0003] However, in practical applications, especially in complex industrial environments, the feeder lines of RFID systems often face problems of external interference and signal leakage. Due to structural and material limitations, the wire passing holes through which the feeder lines pass on the partition between the front storage cavity and the back installation cavity of intelligent tool carts and intelligent tool cabinets often become the key link to prevent signal leakage. Signal leakage not only reduces the efficiency and accuracy of data transmission, but also may lead to data loss or illegal acquisition, thus bringing potential safety hazards.

[0004] Currently, most solutions in the market to avoid problems such as signal leakage adopt schemes such as improving RFID hardware devices or optimizing software algorithms, but there are few effective solutions for in-depth research on the physical connection part. Therefore, there is an urgent need to develop a new electromagnetic shielding method for feeder lines, especially an anti-interference feeder line electromagnetic shielding technology for the wire passing holes through which the feeder lines pass, to improve the signal stability and security of RFID systems in complex environments. Summary of the Utility Model:

[0005] The utility model aims to make up for the deficiencies of the prior art and provides an anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or an intelligent tool cabinet, which solves the problem of the risk of signal leakage in the feeder lines at the wire passing holes on the partition in the past.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] An anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or intelligent tool cabinet, comprising a back mounting cavity and a front storage cavity. A partition is provided between the back mounting cavity and the front storage cavity. An antenna is installed in the front storage cavity, and a reader is installed in the back mounting cavity. The reader is connected to the antenna through a feeder passing through a wire passing hole on the partition. A metal tubular structure is installed at the wire passing hole, and the metal tubular structure is used to form electromagnetic shielding. An absorbing coating is provided on the inner wall of the metal tubular structure. The feeder passes through the metal tubular structure and is connected to the antenna, and the absorbing coating is used to absorb the electromagnetic waves leaked by the feeder.

[0008] The outer surface of the metal tubular structure is provided with external threads, and the metal tubular structure is installed and fixed on both sides of the partition through hexagon nuts.

[0009] The metal tubular structure is made of alloy steel.

[0010] The absorbing coating is a ferrite absorbing material.

[0011] The absorbing coating is attached to the inner wall of the metal tubular structure by conductive spraying.

[0012] The thickness of the absorbing coating is ≥ 0.5 mm.

[0013] The present utility model adopts the above scheme and has the following beneficial effects:

[0014] By installing a metal tubular structure at the wire passing hole of the partition between the back mounting cavity and the front storage cavity of the RFID intelligent tool cart or intelligent tool cabinet, an absorbing coating is provided on the inner wall of the metal tubular structure, and the reader is connected to the antenna through a feeder passing through the metal tubular structure. The metal tubular structure and the absorbing coating cooperate to shield and absorb the electromagnetic waves leaked by the feeder, eliminate the safety hazard of feeder signal leakage at the wire passing hole, achieve the anti-interference electromagnetic shielding effect of the feeder of the RFID system, and significantly improve the signal security and stability of the system in a complex environment. It is not only applicable to the design of new RFID systems, but also can be used for the upgrade and transformation of existing systems. Description of the drawings:

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a schematic installation structure diagram of the present utility model.

[0017] In the figure, 1. Back mounting cavity, 2. Front storage cavity, 3. Partition, 4. Antenna, 5. Wire passing hole, 6. Metal tubular structure, 7. Absorbing coating, 8. Feeder, 9. Hexagon nut. Detailed implementation manners:

[0018] To clearly illustrate the technical features of this solution, the following will elaborate on this utility model in detail through specific implementation manners and in combination with its attached drawings.

[0019] As Figure 1-2 shown, an anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or intelligent tool cabinet includes a back mounting cavity 1 and a front storage cavity 2. A partition 3 is provided between the back mounting cavity 1 and the front storage cavity 2. An antenna 4 is installed in the front storage cavity 2, and a reader is installed in the back mounting cavity 1. The reader is connected to the antenna 4 through a feeder 8 passing through a wire passing hole 5 on the partition 3. A metal tubular structure 6 is installed at the wire passing hole 5. The metal tubular structure 6 is used to form electromagnetic shielding. An absorbing coating 7 is provided on the inner wall of the metal tubular structure 6. The feeder 8 passes through the metal tubular structure 6 and is connected to the antenna 4. The absorbing coating 7 is used to absorb the electromagnetic waves leaked by the feeder.

[0020] The outer surface of the metal tubular structure 6 is provided with external threads, and the metal tubular structure 6 is installed and fixed on both sides of the partition 3 through hexagon nuts 9. During installation, the metal tubular structure 6 is passed through the wire passing hole 5 through which the feeder 8 passes, adjusted to a suitable position, and fixed with hexagon nuts 9 at both the left and right ends respectively.

[0021] The metal tubular structure 6 is made of alloy steel. Specifically, high-quality alloy steel can be selected as the main material of the metal tubular structure. High-quality alloy steel has excellent electrical conductivity and electromagnetic shielding ability, and at the same time has good corrosion resistance and mechanical stability, and can be used to manufacture precision parts.

[0022] The absorbing coating 7 is a ferrite absorbing material. As the most mature absorbing material, ferrite absorbing material becomes the first choice of absorbing materials with its excellent absorption performance and low price. It has the characteristics of high absorption frequency band, high absorption rate, and thin matching thickness, etc. It can be applied to electronic devices to absorb leaked electromagnetic waves and can achieve the purpose of eliminating interference.

[0023] The absorbing coating 7 is attached to the inner wall of the metal tubular structure 6 through conductive spraying. This technology covers steps such as surface pretreatment, application of conductive coating, uniform spraying, and baking and curing to ensure the conductivity and long-term stability of the sprayed coating.

[0024] The thickness of the absorbing coating 7 ≥ 0.5 mm to ensure the absorption effect.

[0025] The specific manufacturing process is as follows:

[0026] 1. Design and manufacture of the metal tubular structure:

[0027] a. According to the size and shape of the feeder connector used in the RFID intelligent tool cart and intelligent tool cabinet, design the specific parameters of the metal tubular structure;

[0028] b. Select high-quality alloy steel as the main material for the metal tubular structure and use precision machining technology to manufacture a tubular structure that meets the design parameters;

[0029] c. Perform outer wall treatment on the manufactured metal tubular structure and process the outer wall of the metal tubular structure to obtain an external thread structure;

[0030] d. Perform inner wall pretreatment on the manufactured metal tubular structure, including cleaning and surface roughening, for subsequent inner wall spraying treatment.

[0031] 2. Conductive spraying process:

[0032] a. Apply a layer of silver particle-containing conductive coating on the inner wall of the pretreated metal tubular structure;

[0033] b. Use precision spraying equipment to evenly coat the ferrite wave-absorbing material to ensure a consistent coating thickness;

[0034] c. After coating, place the metal tubular structure in an oven with controlled temperature for baking to cure the wave-absorbing coating.

[0035] 3. Installation of the metal tubular structure:

[0036] a. Precisely install the manufactured metal tubular structure at the wire passing hole on the partition between the front storage cavity and the back mounting cavity of the RFID intelligent tool cart or intelligent tool cabinet;

[0037] b. Fix both ends of the metal tubular structure with hex nuts to prevent it from falling off or shifting during subsequent use.

[0038] 4. Performance testing and verification:

[0039] a. After the installation of the metal tubular structure, conduct comprehensive performance testing on the RFID system, including signal leakage testing, electromagnetic interference testing, and long-term stability testing;

[0040] b. Verify the effectiveness of the shielding structure through the test data to ensure that it can significantly reduce signal leakage and improve the overall stability of the system during actual use.

[0041] The above specific implementation manners shall not be used as a limitation to the protection scope of the present utility model. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manners of the present utility model shall fall within the protection scope of the present utility model.

[0042] Where the present utility model is not described in detail, it is the well-known technology of those skilled in the art of this technology.

Claims

1. An anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or intelligent tool cabinet, comprising a back mounting cavity and a front storage cavity. A partition is provided between the back mounting cavity and the front storage cavity. An antenna is installed in the front storage cavity, and a reader is installed in the back mounting cavity. The reader is connected to the antenna through a feeder passing through a wire passing hole on the partition. It is characterized in that: A metal tubular structure is installed at the wire passing hole. The metal tubular structure is used to form electromagnetic shielding. An electromagnetic wave absorbing coating is provided on the inner wall of the metal tubular structure. The feeder passes through the metal tubular structure and is connected to the antenna. The electromagnetic wave absorbing coating is used to absorb the electromagnetic waves leaked by the feeder.

2. The anti-interference electromagnetic shielding structure of an RFID intelligent tool vehicle or intelligent tool cabinet according to claim 1, characterized in that: External threads are provided on the outer surface of the metal tubular structure. The metal tubular structure is installed and fixed on both sides of the partition by hexagon nuts.

3. The anti-interference electromagnetic shielding structure of an RFID intelligent tool vehicle or intelligent tool cabinet according to claim 1, characterized in that: The metal tubular structure is made of alloy steel.

4. The anti-interference electromagnetic shielding structure of an RFID intelligent tool cart or intelligent tool cabinet according to claim 1, characterized in that: The electromagnetic wave absorbing coating is a ferrite electromagnetic wave absorbing material.

5. An anti-interference electromagnetic shielding structure for an RFID intelligent tool cart or intelligent tool cabinet according to claim 4, characterized in that: The electromagnetic wave absorbing coating is attached to the inner wall of the metal tubular structure by conductive spraying.

6. The anti-interference electromagnetic shielding structure of an RFID intelligent tool cart or intelligent tool cabinet according to claim 4, characterized in that: The thickness of the electromagnetic wave absorbing coating is ≥ 0.5 mm.

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