Device for RFID tag read-write detection

Abstract

The utility model discloses a device for RFID tag read-write detection, which comprises a working table, a first conveyor belt and a second conveyor belt, a first lifting assembly and a second lifting assembly are arranged on the working table, each of the first lifting assembly and the second lifting assembly comprises a base, a polished rod and a connecting plate, the bases are arranged on the working table, and the polished rod is arranged on the working table. The two ends of the polished rod are fixedly connected with the base and the connecting plate respectively, the polished rod is slidably connected with a sliding block, the connecting plate is rotatably connected with a screw rod, the screw rod is in threaded connection with the sliding block, the sliding block of the first lifting assembly is fixedly connected with the first conveying belt, the sliding block of the second lifting assembly is fixedly connected with the second conveying belt, and the first conveying belt is provided with an RFID read-write mechanism. A removing assembly is arranged at the other end of the first conveying belt, and a positioning assembly is arranged at one end of the second conveying belt. The utility model provides a device for RFID tag read-write detection, the height of the first conveyor belt and the height of the second conveyor belt of the device can be adjusted at will, and the device is compatible with more RFID tag production devices.

Description

Technical Field

[0001] The utility model relates to the field of RFID tag quality inspection, in particular to a device for reading and writing RFID tags. Background Art

[0002] RFID tag is a contactless automatic identification technology, which uses radio frequency signals to identify the target object and obtain relevant data. The identification work does not require human intervention. As a wireless version of barcode, RFID tag has advantages that barcode does not have, such as waterproof, anti-magnetic, high temperature resistance, long service life, large reading distance, etc. The data on RFID tag can be encrypted, the storage capacity is larger, and the stored information can be changed freely. The encoding method, storage and reading and writing method of electronic trademark tags are different from traditional trademark tags (such as barcodes) or manual trademark tags. The storage of RFID tag encoding is stored in read-only or read-write format on the integrated circuit; especially the reading and writing method, RFID tags are realized by wireless electronic transmission.

[0003] During the manufacturing process of RFID tags, since there is inevitably a certain rate of defective products, they need to be identified to prevent non-working RFID tags from being sewn on products and entering the market. Before the emergence of equipment to detect RFID tags, RFID tag detection mostly uses manual detection to eliminate defective products, which divides the production and detection of RFID tags into two processes. Later, RFID tag detection equipment was added to the production line to replace manual detection of RFID tags after production.

[0004] Since the RFID tag detection equipment is added to the production line later, the loading area of ​​the RFID tag detection equipment is usually equipped with an external conveyor belt between the unloading port and the loading area to correspond to the unloading port of the RFID tag production equipment as a means of bridging the height difference between the two. This requires that each RFID tag detection equipment be equipped with a customized conveyor belt when added to the existing production line, which increases the size of the RFID tag detection equipment. Utility Model Content

[0005] The utility model aims to provide a device for reading and writing RFID tags, which can arbitrarily adjust the height of a first conveyor belt and a second conveyor belt of the device and is compatible with more RFID tag production equipment.

[0006] The utility model discloses a technical solution adopted by a device for reading and writing RFID tags: comprising a workbench, a first conveyor belt and a second conveyor belt, wherein a first lifting assembly and a second lifting assembly are arranged on the workbench, the first lifting assembly and the second lifting assembly are respectively close to two ends of the workbench, the first lifting assembly and the second lifting assembly both comprise a base, a polished rod and a connecting plate, the base is placed on the workbench, the two ends of the polished rod are respectively fixedly connected to the base and the connecting plate, a slider is slidably connected to the polished rod, a screw is rotatably connected to the connecting plate, the screw is threadedly connected to the slider, the slider of the first lifting assembly is fixedly connected to the first conveyor belt, the slider of the second lifting assembly is fixedly connected to the second conveyor belt, an RFID reading and writing mechanism is arranged on the first conveyor belt, the RFID reading and writing mechanism is close to one end of the first conveyor belt, a rejection assembly is arranged on the other end of the first conveyor belt, a positioning assembly is arranged on one end of the second conveyor belt, and the other end of the first conveyor belt is close to one end of the second conveyor belt.

[0007] As a preferred solution, the polished rods are a pair and are parallel to each other, the screw rod is located between the two polished rods, one end of the screw rod is fixedly connected to a handle, and the handle is close to the connecting plate.

[0008] As a preferred solution, a connecting seat is fixedly connected to the first conveyor belt, one end of the connecting seat is fixedly connected to a first detection optical fiber, the first detection optical fiber is facing the belt of the first conveyor belt, a connecting rod is slidably connected to the middle of the connecting seat, one end of the connecting rod is fixedly connected to an RFID reading and writing mechanism, and the RFID reading and writing mechanism is suspended above the belt of the first conveyor belt.

[0009] As a preferred solution, a first reading / writing device and a second reading / writing device are provided in the RFID reading / writing mechanism, and an induction antenna is provided inside the first reading / writing device and inside the second reading / writing device.

[0010] As a preferred embodiment, a limiting assembly is provided on the first conveyor belt, and the limiting assembly is close to the other end of the first conveyor belt. The limiting assembly includes a limiting bracket, one end of the limiting bracket is fixedly connected to the first conveyor belt, and the other end of the limiting bracket is rotatably connected to a roller, and the roller is in contact with the belt of the first conveyor belt.

[0011] As a preferred solution, a second detection optical fiber and a third detection optical fiber are provided on the first conveyor belt, the second detection optical fiber and the third detection optical fiber are respectively located on both sides of the roller, and the second detection optical fiber and the third detection optical fiber are both facing the belt of the first conveyor belt.

[0012] As a preferred embodiment, the reject assembly includes a reject cylinder and a reject plate, the reject cylinder is fixedly connected to the first conveyor belt, the output shaft of the reject cylinder is fixedly connected to the reject plate, and the reject plate is located between the first conveyor belt and the second conveyor belt.

[0013] As a preferred embodiment, the positioning assembly includes a positioning cylinder and a positioning bracket, and the positioning cylinder and the positioning bracket are respectively fixedly connected to both sides of the second conveyor belt, a first positioning plate is fixedly connected to the output shaft of the positioning cylinder, and a second positioning plate is fixedly connected to the positioning bracket, and the first positioning plate and the second positioning plate are suspended above the belt of the second conveyor belt.

[0014] As a preferred embodiment, two fourth detection optical fibers are provided on the second conveyor belt, and the two fourth detection optical fibers are respectively located on both sides of the second conveyor belt, and the fourth detection optical fibers are located between the positioning component and the rejection mechanism. The fourth detection optical fibers are facing the belt of the second conveyor belt, and the other end of the second conveyor belt is fixedly connected to a material plate.

[0015] As a preferred solution, a waste collecting hopper is provided on the workbench, the waste collecting hopper is close to the rejecting mechanism, a display is provided on the workbench, and a control panel is provided on the workbench.

[0016] The beneficial effects of the device for reading and writing RFID tags disclosed in the utility model are:

[0017] By rotating the screw rod on the first lifting component, the slider connected thereto is driven to slide up or down on the polished rod, and one end of the first conveyor belt is adjusted to rise or fall close to the unloading area of ​​the external RFID label production equipment, so that the RFID labels processed by the external RFID label production equipment can be directly transported from the unloading area to the first conveyor belt without setting up an external conveyor belt. The design of the adjustable height of the first conveyor belt allows the device to be compatible with RFID label production equipment with unloading areas of different heights. By rotating the screw rod on the second lifting component, the slider connected thereto is driven to slide up or down on the polished rod, and one end of the second conveyor belt is adjusted to rise or fall close to the other end of the first conveyor belt, so that the RFID labels on the first conveyor belt can fall onto the second conveyor belt.

[0018] The belt of the first conveyor belt drives the RFID tag to move from one end of the first conveyor belt to the other end of the first conveyor belt. When the RFID tag moves to the bottom of the RFID reading and writing mechanism on the first conveyor belt, the RFID reading and writing mechanism writes the EPC code into the RFID tag and detects whether the EPC code of the RFID tag can be completely read; when the RFID tag is OK after detection, the rejection component stops running, and the RFID tag falls onto the second conveyor belt driven by the first conveyor belt; when the RFID tag is NG after detection, the rejection component runs, and the RFID tag is sorted out by the rejection component during the process of falling from the first conveyor belt to the second conveyor belt, thereby completing the sorting out of the RFID tags with NG detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a device for reading and writing RFID tags.

[0020] Figure 2 This is a schematic diagram of the first conveyor structure of a device for reading and writing RFID tags in the utility model.

[0021] Figure 3 The utility model is a schematic diagram of the second conveyor belt structure of a device for reading and writing RFID tags. DETAILED DESCRIPTION

[0022] The present invention is further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0023] Please refer to Figure 1 .

[0024] The utility model discloses a device for reading and writing RFID tags, comprising a workbench 131, a first conveyor belt 2 and a second conveyor belt 3;

[0025] A control system is provided inside the workbench 131, and the control system is used to control the operation of the equipment; a control panel 11 is provided on the workbench 131, and the control panel 11 is electrically connected to the control system. Workers input signals to the control system through the control panel 11 to adjust the operating parameters of the equipment. A waste hopper 12 is provided on the workbench 131, and the waste hopper 12 is used to collect RFID tags marked with NG after detection. An expansion bracket is fixedly connected to the workbench 131, and a display is provided on the workbench 131. The display is fixedly connected to the expansion bracket, and the expansion bracket can lift the display to a high place, so that workers can observe the display. The display is electrically connected to the control system, and the control system displays the operating status of the equipment and the adjustment signals input by the control panel 11 on the display.

[0026] Please refer to Figure 1-Figure 3 .

[0027] The workbench 131 is provided with a first lifting assembly 14 and a second lifting assembly 15, which are respectively close to the two ends of the workbench 131; the first lifting assembly 14 and the second lifting assembly 15 each include a base 141, a light rod 142 and a connecting plate 143; the base 141 is fixedly connected to the top of the workbench 131; in this embodiment, the light rod 142 is preferably a pair, and the two light rods 142 are parallel to each other, one end of the light rod 142 is fixedly connected to the base 141, and the light rod 142 is vertical. The connecting plate 143 is connected to the top of the workbench 131, and the other end of the polished rod 142 is fixedly connected. The middle of the polished rod 142 is slidably connected with a slider 144. The two polished rods 142 guide the sliding of the slider 144, which can make the slider 144 more stable when sliding. The connecting plate 143 is rotatably connected with a screw rod 145, which is located between the two polished rods 142. One end of the screw rod 145 is fixedly connected with a handle, which is close to and touches the connecting plate 143, and the other end of the screw rod 145 is threadedly connected with the slider 144. The screw rod 145 is driven to rotate by rotating the handle, and the screw rod 145 drives the slider 144 to slide up or down on the polished rod 142.

[0028] The slider 144 of the first lifting assembly 14 is fixedly connected to one side of the bracket of the first conveyor belt 2 , and the slider 144 of the second lifting assembly 15 is fixedly connected to one side of the bracket of the second conveyor belt 3 . A connecting seat 221 is fixedly connected to the bracket of the first conveyor belt 2. The connecting seat 221 is parallel to the moving direction of the belt of the first conveyor belt 2. The connecting seat 221 is located in the middle of the first conveyor belt 2. A first detection optical fiber 21 is fixedly connected to one end of the connecting seat 221. The first detection optical fiber 21 faces the belt of the first conveyor belt 2. The first detection optical fiber 21 is close to one end of the first conveyor belt 2. The first detection optical fiber 21 is electrically connected to the control system. When the belt of the first conveyor belt 2 drives the RFID tag to move under the first detection optical fiber 21, the first detection optical fiber 21 will detect the signal of the RFID tag below and transmit it to the control system; a connecting rod 222 is slidably connected to the middle of the connecting seat 221. A fixing piece is threadedly connected to the connecting rod 222, and one end of the fixing piece touches the connecting seat 221; the fixing piece is loosened by rotation to allow the connecting rod 222 to slide on the connecting seat 221. After adjusting the position of the connecting rod 222 on the connecting seat 221, the fixing piece is tightened by rotation to make one end of the fixing piece touch the connecting seat 221, so that the connecting rod 222 cannot slide and is fixed in the current position;

[0029] An RFID reading and writing mechanism 22 is provided on the first conveyor belt 2, and the RFID reading and writing mechanism 22 is fixedly connected to one end of the connecting rod 222. The first detection optical fiber 21 is closer to one end of the first conveyor belt 2 than the RFID reading and writing mechanism 22. The RFID reading and writing mechanism 22 is suspended above the belt of the first conveyor belt 2. A first reading and writing device and a second reading and writing device are provided inside the RFID reading and writing mechanism 22. Induction antennas are provided inside the first reading and writing device and inside the second reading and writing device. The first reading and writing device and the second reading and writing device are both electrically connected to the control system, and the two induction antennas are electrically connected to the first reading and writing device and the second reading and writing device, respectively.

[0030] In this embodiment, the RFID reading and writing mechanism 22 preferably has two operating modes:

[0031] The first operation mode of the RFID reading and writing mechanism 22 is that the first detection optical fiber 21 detects that an RFID tag is close to the RFID reading and writing mechanism 22, and the RFID tag moves to the bottom of the first reading and writing device. The control system transmits the EPC code to the first reading and writing device, and the first reading and writing device writes the EPC code into the RFID tag below in a non-contact manner of electromagnetic field through the induction antenna. The first reading and writing device then reads the EPC code in the RFID tag below through the induction antenna to determine whether it is complete, to determine whether the RFID tag is OK or NG, and the second reading and writing device is suspended;

[0032] The second operation mode of the RFID reading and writing mechanism 22 is that the first detection optical fiber 21 detects that there is an RFID tag close to the RFID reading and writing mechanism 22, the RFID tag moves to the bottom of the first reading and writing device, the control system transmits the EPC code to the first reading and writing device, the first reading and writing device writes the EPC code into the RFID tag below by means of an induction antenna in a non-contact electromagnetic field, the RFID tag moves to the bottom of the second reading and writing device, the second reading and writing device reads the EPC code in the RFID tag below by means of an induction antenna in a non-contact electromagnetic field to determine whether the RFID tag is OK or NG.

[0033] A limiting component 23 is provided on the first conveyor belt 2, and the limiting component 23 is close to the other end of the first conveyor belt 2. The limiting component 23 includes a limiting bracket 231; one end of the limiting bracket 231 is fixedly connected to one side of the bracket of the first conveyor belt 2, and the other end of the limiting bracket 231 is rotatably connected to a roller 232, and the roller 232 is in contact with the belt of the first conveyor belt 2; when the belt of the first conveyor belt 2 drives the RFID tag to move close to the roller 232, the roller 232 and the belt of the first conveyor belt 2 can clamp the RFID tag, thereby increasing the friction between the RFID tag and the belt of the first conveyor belt 2.

[0034] A second detection optical fiber 24 and a third detection optical fiber 25 are provided on the first conveyor belt 2. The second detection optical fiber 24 and the third detection optical fiber 25 are respectively located on both sides of the roller 232. The second detection optical fiber 24 and the third detection optical fiber 25 are both facing the belt of the first conveyor belt 2. The second detection optical fiber 24 and the third detection optical fiber 25 are both electrically connected to the control system; the second detection optical fiber 24 and the third detection optical fiber 25 are respectively used for counting and triggering the operation of the rejection component 26. When the belt of the first conveyor belt 2 drives the RFID tag to pass under the second detection optical fiber 24, the second detection optical fiber 24 will transmit the signal of detecting the presence of the RFID tag below to the control system, and the control system will count the RFID tag into the total number of detected RFID tags; when the belt of the first conveyor belt 2 drives the RFID tag to pass under the third detection optical fiber 25, the third detection optical fiber 25 will transmit the signal of detecting the presence of the RFID tag below to the control system, and the control system will transmit the operation signal to the rejection component 26.

[0035] The other end of the first conveyor belt 2 is close to one end of the second conveyor belt 3. A reject assembly 26 is provided on the other end of the first conveyor belt 2, and the waste collecting hopper 12 is close to the reject mechanism. The reject assembly 26 includes a reject cylinder 261 and a reject plate 262; the reject cylinder 261 is fixedly connected to the bracket of the first conveyor belt 2, the reject cylinder 261 is electrically connected to the control system, and the output shaft of the reject cylinder 261 is fixedly connected to the reject plate 262, and the reject plate 262 is located between the first conveyor belt 2 and the second conveyor belt 3. When the RFID tag detection result is OK, the reject cylinder 261 stops running, and the top of the reject plate 262 is lower than the top of the belt of the first conveyor belt 2, so that the RFID tag can be moved to the belt of the second conveyor belt 3 under the drive of the belt of the first conveyor belt 2; when the RFID tag detection result is NG, it is detected by the third detection optical fiber 25 that there is an RFID tag close to the reject component 26, and the control system transmits the operation signal to the reject cylinder 261, and pushes the reject plate 262 through the output shaft of the reject cylinder 261, so that the top of the reject plate 262 is higher than the top of the belt of the first conveyor belt 2, and the roller 232 and the belt below the conveyor belt clamp the RFID tag to touch the reject plate 262, and the reject plate 262 bends the RFID tag, allowing the RFID tag to fall into the waste hopper 12 along the reject plate 262, completing the sorting of RFID tags with NG detection results.

[0036] A positioning assembly is provided on one end of the second conveyor belt 3, and the positioning assembly includes a positioning cylinder 311 and a positioning bracket 312. The positioning cylinder 311 and the positioning bracket 312 are respectively fixedly connected to the two sides of the second conveyor belt 3, and the positioning cylinder 311 is electrically connected to the control system. A first positioning plate is fixedly connected to the output shaft of the positioning cylinder 311, and a second positioning plate is fixedly connected to the positioning bracket 312. The first positioning plate and the second positioning plate are suspended above the belt of the second conveyor belt 3, and the first positioning plate and the second positioning plate are opposite to each other; one end of the second conveyor belt 3 is fixedly connected to the limiting plate 32, and the other end of the second conveyor belt 3 is fixedly connected to the material plate 33.

[0037] Two fourth detection optical fibers 34 are provided on the second conveyor belt 3. The two fourth detection optical fibers 34 are respectively located on both sides of the second conveyor belt 3. The fourth detection optical fiber 34 is located between the positioning assembly and the rejection mechanism. The fourth detection optical fiber 34 faces the belt of the second conveyor belt 3. The fourth detection optical fiber 34 is electrically connected to the control system. When the RFID tag falls onto the belt of the second conveyor belt 3, the blocking of the limit plate 32 can prevent the RFID tag from sliding between the first conveyor belt 2 and the second conveyor belt 3. The RFID tag first passes under the fourth detection optical fiber 34. The fourth detection optical fiber 34 transmits the signal of detecting the RFID tag below to the control system. The control system transmits the running signal to the positioning cylinder 311. The output shaft of the positioning cylinder 311 pushes the first positioning plate, so that the first positioning plate pushes the RFID tag to touch the second positioning plate, so that the RFID tag is aligned, and the RFID tag is neatly placed in the material plate 33 under the belt of the first conveyor belt 2.

[0038] By rotating the handle of the first lifting assembly 14, the handle of the first lifting assembly 14 drives the screw rod 145 to rotate, and the screw rod 145 drives the slider 144 to slide up or down on the light rod 142, so that the slider 144 of the first lifting assembly 14 drives the first conveyor belt 2 to rise or fall to a certain height, so that the first conveyor belt 2 can be connected to the discharge areas of new or old external RFID label production equipment at different heights without setting up an external conveyor belt, so that the device is compatible with most external RFID label production equipment on the market;

[0039] By rotating the handle of the second lifting assembly 15, the handle of the second lifting assembly 15 drives the screw rod 145 to rotate, and the screw rod 145 drives the slider 144 to slide up or down on the light rod 142, so that the slider 144 of the second lifting assembly 15 drives the second conveyor belt 3 to rise or fall to a certain height, so that one end of the second conveyor belt 3 can be closer to the other end of the first conveyor belt 2.

[0040] The utility model provides a device for reading and writing RFID tags. By rotating the screw on the first lifting component, the slider connected thereto is driven to slide up or down on the light rod, and one end of the first conveyor belt is adjusted to rise or fall close to the unloading area of ​​the external RFID tag production equipment, so that the RFID tags processed by the external RFID tag production equipment can be directly transported from the unloading area to the first conveyor belt without setting up an external conveyor belt. The design of the adjustable height of the first conveyor belt allows the device to be compatible with RFID tag production equipment with unloading areas of different heights. By rotating the screw on the second lifting component, the slider connected thereto is driven to slide up or down on the light rod, and one end of the second conveyor belt is adjusted to rise or fall close to the other end of the first conveyor belt, so that the RFID tags on the first conveyor belt can fall onto the second conveyor belt.

[0041] The belt of the first conveyor belt drives the RFID tag to move from one end of the first conveyor belt to the other end of the first conveyor belt. When the RFID tag moves to the bottom of the RFID reading and writing mechanism on the first conveyor belt, the RFID reading and writing mechanism writes the EPC code into the RFID tag and detects whether the EPC code of the RFID tag can be completely read; when the RFID tag is OK after detection, the rejection component stops running, and the RFID tag falls onto the second conveyor belt driven by the first conveyor belt; when the RFID tag is NG after detection, the rejection component runs, and the RFID tag is sorted out by the rejection component during the process of falling from the first conveyor belt to the second conveyor belt, thereby completing the sorting out of the RFID tags with NG detection results.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A device for reading and writing RFID tags, characterized in that: It includes a workbench, a first conveyor belt and a second conveyor belt; The workbench is provided with a first lifting assembly and a second lifting assembly, the first lifting assembly and the second lifting assembly are respectively close to two ends of the workbench, the first lifting assembly and the second lifting assembly each include a base, a polished rod and a connecting plate, the base is placed on the workbench, the two ends of the polished rod are respectively fixedly connected to the base and the connecting plate, a slider is slidably connected to the polished rod, a screw is rotatably connected to the connecting plate, and the screw is threadedly connected to the slider; The slider of the first lifting assembly is fixedly connected to the first conveyor belt, the slider of the second lifting assembly is fixedly connected to the second conveyor belt, an RFID reading and writing mechanism is provided on the first conveyor belt, the RFID reading and writing mechanism is close to one end of the first conveyor belt, a rejection assembly is provided on the other end of the first conveyor belt, a positioning assembly is provided on one end of the second conveyor belt, and the other end of the first conveyor belt is close to one end of the second conveyor belt.

2. The device for reading and writing RFID tags as claimed in claim 1, characterized in that: The polished rods are a pair and are parallel to each other. The screw rod is located between the two polished rods. One end of the screw rod is fixedly connected with a handle, and the handle is close to the connecting plate.

3. The device for reading and writing RFID tags as claimed in claim 2, characterized in that: A connecting seat is fixedly connected to the first conveyor belt, one end of the connecting seat is fixedly connected to a first detection optical fiber, the first detection optical fiber faces the belt of the first conveyor belt, a connecting rod is slidably connected to the middle of the connecting seat, one end of the connecting rod is fixedly connected to an RFID reading and writing mechanism, and the RFID reading and writing mechanism is suspended above the belt of the first conveyor belt.

4. The device for reading and writing RFID tags as claimed in claim 3, characterized in that: The RFID reading and writing mechanism is provided with a first reading and writing device and a second reading and writing device, and the first reading and writing device and the second reading and writing device are both provided with an induction antenna.

5. The device for reading and writing RFID tags as claimed in claim 4, characterized in that: A limiting assembly is provided on the first conveyor belt, and the limiting assembly is close to the other end of the first conveyor belt. The limiting assembly includes a limiting bracket, one end of the limiting bracket is fixedly connected to the first conveyor belt, and the other end of the limiting bracket is rotatably connected to a roller, and the roller is in contact with the belt of the first conveyor belt.

6. The device for reading and writing RFID tags as claimed in claim 5, characterized in that: The first conveyor belt is provided with a second detection optical fiber and a third detection optical fiber, the second detection optical fiber and the third detection optical fiber are respectively located on both sides of the roller, and the second detection optical fiber and the third detection optical fiber are both facing the belt of the first conveyor belt.

7. The device for reading and writing RFID tags as claimed in claim 6, characterized in that: The reject assembly includes a reject cylinder and a reject plate, wherein the reject cylinder is fixedly connected to the first conveyor belt, and the output shaft of the reject cylinder is fixedly connected to the reject plate, and the reject plate is located between the first conveyor belt and the second conveyor belt.

8. The device for reading and writing RFID tags as claimed in claim 7, characterized in that: The positioning assembly includes a positioning cylinder and a positioning bracket, which are respectively fixedly connected to both sides of the second conveyor belt. A first positioning plate is fixedly connected to the output shaft of the positioning cylinder, and a second positioning plate is fixedly connected to the positioning bracket. The first positioning plate and the second positioning plate are suspended above the belt of the second conveyor belt.

9. The device for reading and writing RFID tags as claimed in claim 8, characterized in that: Two fourth detection optical fibers are provided on the second conveyor belt, and the two fourth detection optical fibers are respectively located on both sides of the second conveyor belt, and the fourth detection optical fibers are located between the positioning component and the rejection mechanism. The fourth detection optical fibers face the belt of the second conveyor belt, and a material plate is fixedly connected to the other end of the second conveyor belt.

10. The device for reading and writing RFID tags as claimed in claim 9, characterized in that: A waste collecting hopper is arranged on the workbench, the waste collecting hopper is close to the rejecting mechanism, a display is arranged on the workbench, and a control panel is arranged on the workbench.

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