Full-shielding tunnel type scanning device based on RFID technology and label rapid identification method thereof

Abstract

The invention belongs to the technical field of scanning devices, and particularly relates to a full-shielding tunnel type scanning device based on an RFID (Radio Frequency Identification Device) technology, which comprises a front-end conveying line, an RFID tunnel machine main body and a rear-end conveying line which operate independently and are controlled independently, the RFID tunnel machine main body comprises a mechanical unit, an electric control unit, a radio frequency identification unit, a roller shutter door control unit and a software control unit; the mechanical unit comprises a four-direction rotating structure and is used for rotating by 180 degrees up and down and back and forth so as to meet different space requirements. The radio frequency identification unit comprises at least four radio frequency identification (RFID) antennas, wherein two groups of antennas I are arranged at the bottom of the radio frequency identification unit. According to the automatic roller shutter door, the light wear-resistant cloth and the electromagnetic shielding cloth are combined, so that the shielding performance is guaranteed, and meanwhile, the personnel injury risk caused by misoperation is greatly reduced; the service life of the roller shutter door is prolonged through the design of the double-layer wear-resistant cloth, abrasion caused by frequent opening and closing is reduced, and the maintenance cost is reduced by 40%.

Description

Technical Field

[0001] This invention relates to the field of scanning device technology, specifically to a fully shielded tunnel scanning device based on RFID technology and a method for rapid tag identification. Background Technology

[0002] RFID (Radio Frequency Identification) technology is a type of automatic identification technology that uses radio frequency for non-contact two-way data communication. It uses radio frequency to read and write RFID electronic tags, thereby achieving the purpose of identifying targets and exchanging data.

[0003] The RFID fully shielded tunnel scanning device, or RFID tunnel machine for short, is an integrated device that uses RFID technology as the main technology and mechanical and electrical automation technology as a supplement. The device is an automated device that can quickly read a large number of RFID electronic tags. The device includes mechanical units, electrical control units, radio frequency identification units, and software control units.

[0004] With the widespread application of RFID technology, its application scenarios are becoming increasingly diversified. RFID tunnel machines can effectively solve the problem of rapid scanning of high-frequency, large-volume RFID electronic tags in warehousing and logistics processes.

[0005] Limited by factors such as mechanical process design, electromagnetic interference, and electrical automation logic, most similar equipment on the market cannot achieve optimal mechanical shielding, motor automation logic, and electromagnetic interference protection. This results in the inability to use maximum power for batch scanning, slow continuous scanning speed, and low scanning efficiency.

[0006] Therefore, we propose a fully shielded tunnel scanning device based on RFID technology. This device is widely used in clothing, retail, power grid, railway, aviation, logistics and other fields. Summary of the Invention

[0007] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted in this invention is as follows:

[0009] A fully shielded tunnel scanning device based on RFID technology includes: a front-end conveyor line, an RFID tunnel machine body, and a rear-end conveyor line, which operate and are controlled independently. The RFID tunnel machine body includes a mechanical unit, an electrical control unit, a radio frequency identification unit, a roller shutter door control unit, and a software control unit. The mechanical unit includes a four-way rotating structure for 180° rotation up and down and forward and backward to adapt to different space requirements. The radio frequency identification unit includes at least four RFID antennas, with two sets of antenna one at the bottom and one set of adjustable antenna two on each of the left and right sides. The shell of the RFID tunnel machine body... Made of metal with an insulated surface, the automatic roller shutter door employs a four-layer shielding structure consisting of double-layer electromagnetic shielding cloth and double-layer wear-resistant fabric. Adjustable baffles are attached to the metal shell on all four sides, with a contact distance of 8-10cm. The electrical control unit includes a PLC controller, relay module, motor, and photoelectric sensor group. The motor is encased in metal to shield against electromagnetic interference. The roller shutter door control unit is connected to the automatic roller shutter door and controls its raising and lowering. The software control unit is connected to an industrial control host computer to receive and process scanning data from the RFID reader.

[0010] In a preferred embodiment, the present invention can be further configured such that the mechanical unit of the four-way rotating structure is fixed by adjustable screws to adapt to different heights and spatial position requirements.

[0011] In a preferred embodiment, the present invention can be further configured such that the front-end conveyor line, the RFID tunnel machine body, and the rear-end conveyor line all use conveyor belts, and the conveyor belts are made of industrial chain plate material and plastic, in order to reduce RFID signal attenuation and avoid metal electrostatic shielding.

[0012] In a preferred embodiment, the present invention can be further configured such that the wiring layout of the electronic control unit avoids the RFID signal transmission area, and the electronic control box is located above the device with a metal isolation layer at the bottom.

[0013] In a preferred embodiment, the present invention can be further configured such that the photoelectric sensor group includes photoelectric sensors 1-8, wherein:

[0014] Photoelectric sensor No. 1 is used for starting equipment and energy-saving control;

[0015] Photoelectric sensor No. 2 is used for queue detection;

[0016] Photoelectric sensor No. 3 detected that the goods had fully entered the main body;

[0017] Photoelectric sensor No. 4 and photoelectric sensor No. 5 are used to locate the scanning position;

[0018] Photoelectric sensor No. 6 detects that the goods have left the main body;

[0019] Photoelectric sensor No. 7 and photoelectric sensor No. 8 control the operation of the back-end conveyor line.

[0020] In a preferred embodiment, the invention can be further configured such that the device supports a fast mode and a large-volume deep read mode.

[0021] In the fast mode, the goods trigger the automatic roller shutter door to descend synchronously and the RFID reader to start through photoelectric sensors No. 1, No. 2, No. 3, No. 4 and No. 5.

[0022] In the deep reading mode, the goods move back and forth between photoelectric sensor No. 4 and photoelectric sensor No. 5 to enhance the tag reading rate.

[0023] The present invention also includes a method for rapid identification of RFID tags based on the above-described device, comprising the following steps:

[0024] Goods enter the main body of the RFID tunnel machine via the front-end conveyor line;

[0025] After the automatic roller shutter door descends, the RFID reader scans the tag and uploads the data to the industrial control host computer;

[0026] After scanning is completed, the automatic roller shutter door rises, and the goods are transported to the rear conveyor line.

[0027] In a preferred embodiment, the invention can be further configured such that the fast mode includes:

[0028] When the goods trigger photoelectric sensor No. 3, the automatic roller shutter door descends synchronously and activates the RFID reader.

[0029] After scanning is completed, the automatic roller shutter door rises, and the next item is allowed to enter after the goods trigger photoelectric sensor No. 6.

[0030] In a preferred embodiment, the present invention can be further configured such that the large-volume deep reading mode includes:

[0031] If the tag is not read within the set time, the goods will move back and forth between photoelectric sensor No. 4 and photoelectric sensor No. 5.

[0032] RFID readers continuously scan during the movement of goods to cover areas where tags are not visible.

[0033] In a preferred embodiment, the present invention can be further configured such that the peak reading speed of the RFID reader is 1000 pcs / s, and the recognition rate of weak signal tags is improved through the spatial coverage design of the left and right side antennas.

[0034] The above-described technical solution of the present invention has the following beneficial technical effects:

[0035] 1. High security and durability:

[0036] Automatic roller shutter doors use a combination of lightweight and wear-resistant fabric and electromagnetic shielding fabric, which greatly reduces the risk of personal injury due to misoperation while ensuring shielding performance.

[0037] The double-layer wear-resistant fabric design extends the service life of automatic roller shutters, reduces wear caused by frequent opening and closing, and lowers maintenance costs by 40%.

[0038] 2. Energy-saving and environmentally friendly:

[0039] Through the energy-saving control logic of the No. 1 photoelectric sensor, the equipment automatically enters a sleep state after 30 seconds of inactivity, reducing energy consumption by 25%, which is suitable for 24-hour continuous operation scenarios.

[0040] The recyclable design of the plastic conveyor belt and metal components meets green manufacturing standards.

[0041] 3. Enhanced anti-interference and stability:

[0042] The electrical control unit uses a metal-encased motor, an isolated electrical control box, and an optimized circuit layout to reduce the internal electromagnetic interference intensity to below 20dB, ensuring the stability of the RFID reader signal.

[0043] The adjustable baffle allows for precise distance control (8-10cm), further eliminating the risk of signal leakage and reducing the misread rate to less than 0.1%.

[0044] 4. Modularity and scalability:

[0045] The front-end conveyor line, tunnel machine body and rear-end conveyor line are independently controlled, supporting quick disassembly and modular replacement, which facilitates equipment upgrades or adapts to different scales of operation needs;

[0046] The adjustable position of the left and right side antennas allows for expansion to accommodate more antenna configurations, meeting the scanning needs of ultra-large batches of tags (such as 5000pcs / batch).

[0047] Multi-scenario adaptability:

[0048] The four-way rotating mechanical structure supports flexible scanning of non-standard goods (such as irregularly shaped packages and hanging clothing), improving versatility by 60%.

[0049] The reciprocating motion logic of the deep reading mode is compatible with low-speed high-precision or high-speed low-precision scenarios, and can adapt to the needs of different industries (such as precise traceability of medical equipment or rapid sorting in e-commerce logistics). Attached Figure Description

[0050] Figure 1This is a front view of a fully shielded tunnel scanning device based on RFID technology according to an embodiment of the present invention;

[0051] Figure 2 This is a partial cross-sectional view of a fully shielded tunnel scanning device based on RFID technology according to an embodiment of the present invention;

[0052] Figure 3 This is a depth cross-sectional view of a fully shielded tunnel scanning device based on RFID technology according to an embodiment of the present invention.

[0053] Figure label:

[0054] 1. Front-end conveyor line; 2. RFID tunnel machine body; 3. Rear-end conveyor line; 4. Antenna 1; 5. Antenna 2; 6. Automatic roller shutter door; 7. Adjustable baffle; 8. PLC controller; 9. Motor; 10. Industrial control host computer; 11. RFID reader / writer; 12. Conveyor belt; 13. Electrical control box; 14. Photoelectric sensor No. 1; 15. Photoelectric sensor No. 2; 16. Photoelectric sensor No. 3; 17. Photoelectric sensor No. 4; 18. Photoelectric sensor No. 5; 19. Photoelectric sensor No. 6; 20. Photoelectric sensor No. 7; 21. Photoelectric sensor No. 8; 22. Relay module; 23. Roller shutter door control unit. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0056] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a fully shielded tunnel scanning device based on RFID technology.

[0057] Combination Figure 1-3As shown, the present invention provides a fully shielded tunnel scanning device based on RFID technology, comprising: a front-end conveyor line 1, an RFID tunnel machine body 2, and a rear-end conveyor line 3, which operate and are controlled independently. The RFID tunnel machine body 2 includes a mechanical unit, an electrical control unit, a radio frequency identification unit, a roller shutter door control unit 23, and a software control unit. The mechanical unit includes a four-way rotating structure for 180° rotation up and down and forward and backward to adapt to different space requirements. The radio frequency identification unit includes at least four RFID antennas, with two sets of antenna 4 at the bottom and one set of adjustable antenna 5 on each of the left and right sides. The RFID tunnel machine body 2... The casing is made of metal with an insulating surface. The automatic roller shutter door 6 employs a four-layer shielding structure, consisting of double-layer electromagnetic shielding cloth and double-layer wear-resistant fabric. It is attached to the metal casing via adjustable baffles 7, which are distributed on the top, bottom, left, and right sides with a contact distance of 8-10cm. The electrical control unit includes a PLC controller 8, a relay module 22, a motor 9, and a photoelectric sensor group. The motor 9 is encased in metal to shield against electromagnetic interference. The roller shutter door control unit 23 is connected to the automatic roller shutter door 6 and is used to control the raising and lowering of the automatic roller shutter door 6. The software control unit is connected to the industrial control host computer 10 and is used to receive and process the scanning data from the RFID reader 11.

[0058] Furthermore, the mechanical unit of the four-way rotating structure is fixed by adjustable screws to adapt to different heights and spatial position requirements.

[0059] Furthermore, the front-end conveyor line 1, the RFID tunnel machine body 2, and the rear-end conveyor line 3 all use conveyor belts 12, and the conveyor belts 12 are made of industrial chain plate material and plastic to reduce RFID signal attenuation and avoid metal electrostatic shielding.

[0060] On the other hand, the wiring layout of the electronic control unit avoids the RFID signal transmission area, and the electronic control box 13 is located above the equipment with a metal isolation layer at the bottom.

[0061] It should be noted that the photoelectric sensor group includes photoelectric sensors 1-8, wherein:

[0062] Photoelectric sensor 14 is used for starting equipment and energy-saving control;

[0063] Photoelectric sensor 15, number 2, is used for queue detection;

[0064] Photoelectric sensor #3 detected that the goods had fully entered the main body;

[0065] Photoelectric sensor 17 (No. 4) and photoelectric sensor 18 (No. 5) are used to locate the scanning position.

[0066] Photoelectric sensor #6 detected the goods leaving the main body;

[0067] Photoelectric sensor No. 7 (20) and photoelectric sensor No. 8 (21) control the operation of the back-end conveyor line.

[0068] Furthermore, the device supports both a fast mode and a large-volume deep read mode:

[0069] In the fast mode, the goods trigger the automatic roller shutter door 6 to descend synchronously and the RFID reader 11 to start through photoelectric sensor 14, photoelectric sensor 15, photoelectric sensor 16, photoelectric sensor 4, photoelectric sensor 17 and photoelectric sensor 5.

[0070] In the deep reading mode, the goods move back and forth between photoelectric sensor 4 (17) and photoelectric sensor 5 (18) to enhance the tag reading rate.

[0071] Furthermore, the following steps are also included:

[0072] Goods enter the RFID tunnel machine body 2 via the front-end conveyor line 1;

[0073] After the automatic roller shutter door 6 descends, the RFID reader 11 scans the tag and uploads the data to the industrial control host computer 10;

[0074] After scanning is completed, the automatic roller shutter door 6 rises, and the goods are transported to the rear conveyor line 3.

[0075] Preferably, the fast mode includes:

[0076] When the goods trigger photoelectric sensor 16 (No. 3), the automatic roller shutter door 6 descends synchronously and activates RFID reader 11.

[0077] After scanning is completed, the automatic roller shutter door 6 rises, and the goods trigger photoelectric sensor 19 6, allowing the next goods to enter.

[0078] Furthermore, the large-volume deep read mode includes:

[0079] If the tag is not read within the set time, the goods will move back and forth between photoelectric sensor 17 (No. 4) and photoelectric sensor 18 (No. 5).

[0080] The RFID reader 11 continuously scans during the movement of goods to cover the blind spots of the tags.

[0081] It should be noted that the peak reading speed of the RFID reader 11 is 1000pcs / s, and the spatial coverage design of the left and right side antennas 25 improves the recognition rate of weak signal tags.

[0082] Example:

[0083] Taking warehousing and logistics scenarios as an example:

[0084] The goods are placed on the front conveyor line 1, triggering photoelectric sensor 14 to start the equipment;

[0085] After the goods enter the tunnel machine body 2, photoelectric sensor 16 detects that the goods are in place, and the automatic roller shutter door 6 descends and starts scanning.

[0086] If the label is not fully recognized, the goods will move back and forth between photoelectric sensor 17 (No. 4) and photoelectric sensor 18 (No. 5) until the data upload is complete.

[0087] After scanning, the goods enter the sorting process via the back-end conveyor line 3.

[0088] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fully shielded tunnel scanning device based on RFID technology, characterized in that, include: The front-end conveyor line (1), the RFID tunnel machine body (2), and the rear-end conveyor line (3) operate and are controlled independently. The RFID tunnel machine body (2) includes a mechanical unit, an electrical control unit, a radio frequency identification unit, a roller shutter door control unit (23), and a software control unit; The mechanical unit includes a four-way rotating structure, which can rotate 180° up and down and forward and backward to adapt to different space requirements; The radio frequency identification unit includes at least four RFID antennas, of which two sets of antenna one (4) are provided at the bottom, and one set of antenna two (5) with adjustable position is provided on each of the left and right sides; The shell of the RFID tunnel machine body (2) is made of metal and the surface is insulated. The automatic roller shutter door (6) adopts a four-layer shielding structure made of double-layer electromagnetic shielding cloth and double-layer wear-resistant cloth. It is attached to the metal shell through an adjustable baffle (7). The baffle is distributed on the four sides of the top, bottom, left and right, and the attachment distance is 8-10cm. The electrical control unit includes a PLC controller (8), a relay module (22), a motor (9), and a photoelectric sensor group. The motor (9) is encased in metal to shield electromagnetic interference. The roller shutter door control unit (23) is connected to the automatic roller shutter door (6) and is used to control the raising and lowering of the automatic roller shutter door (6); The software control unit is connected to the industrial control host computer (10) and is used to receive and process the scanning data of the RFID reader (11).

2. The fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The mechanical unit of the four-way rotating structure is fixed by adjustable screws to adapt to different heights and spatial position requirements.

3. The fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The front-end conveyor line (1), the RFID tunnel machine body (2) and the rear-end conveyor line (3) all use conveyor belts (12), and the conveyor belts (12) are made of industrial chain plate material and plastic to reduce RFID signal attenuation and avoid metal electrostatic shielding.

4. The fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The wiring layout of the electrical control unit avoids the RFID signal transmission area, and the electrical control box (13) is located above the equipment with a metal isolation layer at the bottom.

5. The fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The photoelectric sensor group includes photoelectric sensors numbered 1-8, wherein: Photoelectric sensor No. 1 (14) is used for starting equipment and energy-saving control; Photoelectric sensor No. 2 (15) is used for queue detection; Photoelectric sensor No. 3 (16) detects that the goods have completely entered the main body; Photoelectric sensor No. 4 (17) and photoelectric sensor No. 5 (18) are used to locate the scanning position; Photoelectric sensor No. 6 (19) detects that the goods have left the main body; Photoelectric sensor No. 7 (20) and photoelectric sensor No. 8 (21) control the operation of the back-end conveyor line.

6. The fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The device supports both fast mode and large-volume deep read mode: In the fast mode, the goods trigger the automatic roller shutter door (6) to descend synchronously and the RFID reader (11) to start through photoelectric sensor No. 1 (14), photoelectric sensor No. 2 (15), photoelectric sensor No. 3 (16), photoelectric sensor No. 4 (17) and photoelectric sensor No. 5 (18); In the deep reading mode, the goods move back and forth between photoelectric sensor No. 4 (17) and photoelectric sensor No. 5 (18) to enhance the tag reading rate.

7. A method for rapid identification of RFID tags based on the device according to any one of claims 1-6, characterized in that, Includes the following steps: Goods enter the RFID tunnel machine body (2) via the front-end conveyor line (1); After the automatic roller shutter door (6) descends, the RFID reader (11) scans the tag and uploads the data to the industrial control host computer (10); After scanning is completed, the automatic roller shutter door (6) rises and the goods are transported to the rear conveyor line (3).

8. The method for rapid identification of RFID tags using the device according to claim 7, characterized in that, The fast mode includes: When the goods trigger photoelectric sensor No. 3 (16), the automatic roller shutter door (6) descends synchronously and the RFID reader (11) is activated. After scanning is completed, the automatic roller shutter door (6) rises, and the goods trigger photoelectric sensor (19) 6, allowing the next goods to enter.

9. The method for rapid identification of RFID tags according to claim 7, characterized in that, The large-volume deep read mode includes: If the tag is not read within the set time, the goods will move back and forth between photoelectric sensor No. 4 (17) and photoelectric sensor No. 5 (18); The RFID reader (11) continuously scans the goods during movement to cover the blind spots of the tags.

10. A fully shielded tunnel scanning device based on RFID technology according to claim 1, characterized in that, The peak reading speed of the RFID reader (11) is 1000pcs / s, and the recognition rate of weak signal tags is improved by the spatial coverage design of the left and right side antennas (5).

Images