Device for testing thermal stability of RFID (Radio Frequency Identification Device) antenna

Abstract

The invention relates to the technical field of RFID antenna performance testing, and particularly provides an RFID antenna thermal stability testing device which comprises a sealing box, a temperature adjusting mechanism, a pick-and-place clamping mechanism and a mobile testing mechanism. According to the invention, through the cooperation of the opening and closing part, the pick-and-place clamping mechanism and the mobile testing mechanism, when an antenna and a label are replaced, the antenna and the label are inserted into the pick-and-place clamping mechanism from the corresponding feeding ports, and then the pick-and-place clamping mechanism and the mobile testing mechanism are matched for replacement and clamping; therefore, the antenna and the tag are fixed on the mobile test mechanism, automatic entering and clamping replacement of the antenna and the tag are realized, the convenience of the antenna thermal stability test is greatly improved, the sealing box does not need to be manually opened and closed, and the problems of heat leakage in the sealing box and reduction of the antenna test accuracy cannot be caused.

Description

Technical Field

[0001] The present invention relates to the technical field of RFID antenna performance testing, and specifically provides a testing device for the thermal stability of RFID antennas. Background Art

[0002] An RFID antenna is a key component in an RFID system for receiving and transmitting radio frequency signals. Its performance directly affects the communication distance, stability, and environmental adaptability. Thermal stability is a key indicator for evaluating the performance reliability of an RFID antenna in an environment with temperature changes, and the reading distance and signal strength are important indicators for determining the thermal stability of an RFID antenna.

[0003] Reading distance: For an RFID antenna with good thermal stability, when the temperature changes, the effective reading distance between it and the tag should be relatively stable. If the reading distance significantly shortens or extends when the temperature rises or falls, it indicates that there may be problems with its thermal stability.

[0004] Signal strength: A stable signal strength is an important manifestation of good thermal stability of an RFID antenna. In different temperature environments, the signal strength received and transmitted by the antenna should be maintained within a certain range with small fluctuations. If the signal strength fluctuates significantly with temperature changes, it may cause incorrect tag recognition or reading failure, indicating poor thermal stability of the antenna.

[0005] When testing the stability of the antenna, it is necessary to fix the antenna and the tag in a sealed temperature chamber and then conduct dynamic testing. However, when fixing the antenna and the tag, removing them after the test, and then re-fixing and testing again, it is necessary to continuously disassemble and remove the antenna and the tag and re-place the next antenna and tag for fixing. This not only makes the operation cumbersome but also requires continuously opening the sealed temperature chamber, resulting in poor sealing of the temperature chamber and affecting the test accuracy of the antenna. Summary of the Invention

[0006] In view of the above problems, the embodiments of the present invention provide a testing device for the thermal stability of RFID antennas to solve the technical problems in the related art.

[0007] To achieve the above object, the embodiments of the present invention provide the following technical solution: A testing device for the thermal stability of RFID antennas, comprising: a sealed box, a temperature adjustment mechanism, a picking and clamping mechanism, and a moving testing mechanism. A transparent plate is installed on the side wall of the sealed box, and two feeding ports are provided on the top of the sealed box, and an adaptive opening and closing part is provided on the feeding ports.

[0008] The temperature adjustment mechanism, the picking and placing clamping mechanism, and the moving test mechanism are all installed on the sealed box. The temperature adjustment mechanism is a prior art and includes a hot air inlet, a hot air outlet, and a temperature measuring instrument. The hot air inlet, the hot air outlet, and the temperature measuring instrument cooperate to adjust the temperature inside the sealed box.

[0009] The opening and closing part includes two receiving grooves symmetrically arranged along the width direction on the side wall of the feed inlet. A closing plate is installed in the receiving groove through a first return spring. The opposite surfaces of the two closing plates in the same feed inlet are both arc-shaped.

[0010] The picking and placing clamping mechanism includes two supporting and clamping parts symmetrically arranged, which are respectively used to clamp the antenna and the label. A driving part for driving the two supporting and clamping parts to clamp the antenna and the label and move up and down is provided on the top of the sealed box.

[0011] The moving test mechanism includes two mounting brackets arranged along the length direction of the sealed box. One of the mounting brackets is fixedly connected to the sealed box and a rangefinder is installed at the bottom of the mounting bracket. The other mounting bracket is slidably connected to the sealed box and a translation driving source for driving the mounting bracket is installed on the sealed box. Two limiting seats are installed on the top of both mounting brackets. The two limiting seats on the same mounting bracket are used to support and limit the antenna or label clamped by the supporting and clamping part above it. A clamping part for clamping the antenna and the label supported on the limiting seats of the two mounting brackets is also provided inside the sealed box.

[0012] In a possible implementation manner, the supporting and clamping part includes an L-shaped bracket provided on the driving part. A fixing plate is installed on the top of the L-shaped bracket. Two limiting clamping seats symmetrically arranged along its length direction are slidably connected to the fixing plate. The limiting clamping seats are in a C shape. An adaptive centering and alignment component is provided between the two vertical sections of the limiting clamping seat. The two centering and alignment components cooperate with the L-shaped bracket to support and center-align the antenna or label.

[0013] In a possible implementation manner, the centering and alignment component includes spring grooves opened on the two opposite surfaces of the limiting clamping seat. A guiding plate is installed on the spring groove through a return spring. The top of the guiding plate and one side located at the opening of the limiting clamping seat are both arc-shaped, and uniform beads are installed on the opposite surfaces of the two guiding plates.

[0014] In a possible implementation manner, the driving part includes an inverted T-shaped frame installed between two sliding grooves opened at the top of the sealing box and two limiting clamping seats arranged along the length direction of the sealing box. The vertical section of the inverted T-shaped frame slidably penetrates through the sliding groove. A two-way air cylinder is also installed on the top of the sealing box. Sliders are installed at both telescopic ends of the two-way air cylinder. A guiding groove for slidably connecting with the slider is opened on the vertical section of the inverted T-shaped frame. An adaptive sealing assembly is provided on the sliding groove. Two symmetrically arranged connecting frames are slidably installed on the two inverted T-shaped frames together. The connecting frame is connected to the vertical section of the L-shaped bracket through a connecting bar. A lifting driving source (such as an electric slider) for driving the connecting frame to lift is provided on the top of the sealing box.

[0015] In a possible implementation manner, the sealing assembly includes receiving grooves opened on both sides of the sliding groove arranged along the thickness direction of the inverted T-shaped frame. A pressing plate elastically abutted against the side wall of the inverted T-shaped frame is installed in one of the receiving grooves through a second return spring. A movable sealing plate is slidably connected in the other receiving groove. The movable sealing plate is fixedly connected to the slider.

[0016] In a possible implementation manner, a plug lock assembly for locking the closing plate is further installed on the connecting frame. The plug lock assembly includes a plug rod installed on the connecting frame through an ear plate. A jack corresponding to the plug rod is opened on the closing plate. The plug rod penetrates through the sealing box and the receiving groove and is inserted into the jack.

[0017] In a possible implementation manner, the limiting seat is in a U shape. The tops of the two vertical sections of the limiting seat are both arc-shaped and the two arcs are arranged in an inverted V shape.

[0018] In a possible implementation manner, the clamping part includes a clamping plate slidably connected to the limiting seat. Two sliding plates symmetrically arranged along the width direction of the sealing box are installed on the inner side wall of the sealing box through elastic members. Guide grooves are opened on the opposite surfaces of the two sliding plates. Moving blocks are installed on the guide grooves. A conversion pushing assembly is jointly installed on the moving blocks and the limiting seat. Two T-shaped grooves symmetrically arranged along the length direction are opened on the top of the sliding plate. A plug block matched with the T-shaped groove is installed at the bottom of the limiting clamping seat through an inclined plate.

[0019] In a possible implementation manner, the conversion pushing assembly includes racks installed on the opposite surfaces of the clamping plate and the moving block. A support frame is installed on the limiting seat. A gear meshing and driving with both racks is rotatably connected to the support frame. A limiting block is slidably connected to the mounting frame. A rib plate is installed between the limiting block and the moving block.

[0020] In a possible implementation manner, guiding components are installed between the bottom of the sliding plate and the two mounting frames. The guiding component includes a rectangular guiding groove formed at the bottom of the sliding plate. Symmetrically arranged limiting grooves are formed at the tops of the two mounting frames. A rectangular block is slidably connected in the limiting groove. The rectangular block on the mounting frame fixedly connected to the sealing box is fixedly connected to the bottom of the sliding plate, and the rectangular block on the other mounting frame is slidably connected to the rectangular guiding groove.

[0021] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. An RFID antenna thermal stability testing device designed by the present invention, through the cooperation of the opening and closing part, the picking and placing clamping mechanism and the moving testing mechanism, when replacing the antenna and the tag, only need to insert the antenna and the tag into the picking and placing clamping mechanism from the corresponding feeding port, and then through the cooperation of the picking and placing clamping mechanism and the moving testing mechanism for replacement clamping, so as to fix the antenna and the tag on the moving testing mechanism, realizing the automatic clamping and replacement of the antenna and the tag, greatly improving the convenience of the antenna thermal stability test, and without manually opening and closing the sealing box, there will be no problems such as temperature leakage in the sealing box and reduction of the test accuracy of the antenna.

[0022] 2. The picking and placing clamping mechanism and the moving testing mechanism of the present invention cooperate to automatically complete the fixed clamping conversion of the antenna and the tag between the two, realizing the function of automatically converting and fixing the antenna and the tag between the two, greatly improving the efficiency of the antenna test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0024] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention.

[0025] Figure 2 is the three-dimensional structure schematic diagram of the picking and placing clamping mechanism, the moving testing mechanism, the antenna and the tag of the present invention.

[0026] Figure 3 is Figure 2 the partial enlarged schematic diagram at A of

[0027] Figure 4 is the downward sectional structure schematic diagram of the limiting card seat and the centering alignment component of the present invention.

[0028] Figure 5 is the structure schematic diagram of the opening and closing part of the present invention.

[0029] Figure 6 It is a schematic structural diagram of the sealing component of the present invention.

[0030] Figure 7 It is a schematic structural diagram of the guiding component of the present invention.

[0031] Figure 8 is Figure 3 A partial enlarged schematic diagram at position B of

[0032] Reference numerals: 1. Sealing box; 2. Feed inlet; 3. Opening and closing part; 30. Accommodating groove; 31. Closing plate; 32. First return spring; 4. Temperature regulating mechanism; 5. Picking and placing clamping mechanism; 50. Supporting and clamping part; 501. L-shaped bracket; 502. Fixed plate; 503. Limit clamping seat; 504. Centering and aligning component; 520. Spring groove; 521. Guide plate; 522. Return spring; 51. Driving part; 510. Inverted T-shaped frame; 511. Double-acting cylinder; 512. Slide block; 513. Guide groove; 514. Connecting frame; 515. Sealing gasket; 530. Storage groove; 531. Second return spring; 532. Baffle; 533. Moving sealing plate; 540. Plug rod; 541. Jack; 6. Moving test mechanism; 60. Mounting frame; 601. Limit block; 602. Rib plate; 61. Rangefinder; 62. Limit seat; 63. Clamping part; 630. Clamping plate; 631. Sliding plate; 632. Guide groove; 633. Moving block; 634. T-shaped groove; 635. Insert block; 640. Rack; 641. Gear; 650. Rectangular guide groove; 651. Limit groove; 652. Rectangular block; 7. Antenna; 8. Label. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Refer to Figure 1 , an RFID antenna thermal stability test device, comprising: a sealing box 1, a temperature regulating mechanism 4, a picking and placing clamping mechanism 5 and a moving test mechanism 6. A transparent plate is installed on the side wall of the sealing box 1, two feed inlets 2 are provided on the top of the sealing box 1, and an adaptive opening and closing part 3 is provided on the feed inlet 2.

[0036] Refer to Figure 1 , the temperature adjustment mechanism 4, the picking and clamping mechanism 5 and the moving test mechanism 6 are all installed on the sealed box 1. The temperature adjustment mechanism 4 is an existing technology, including a hot air inlet, a hot air outlet and a temperature measuring instrument. The hot air inlet, the hot air outlet and the temperature measuring instrument cooperate to adjust the temperature inside the sealed box 1.

[0037] During adjustment, set the test temperature points inside the temperature box according to the application scenario. Industrial grade: -40°C, -20°C, 25°C, 85°C, 125°C; Consumer grade: -25°C, 0°C, 25°C, 6°C, 85°C; Then, through the cooperation of the picking and clamping mechanism 5 and the moving test mechanism 6, perform dynamic moving measurement on the antenna 7 at each temperature point, so as to detect whether the thermal stability of the antenna 7 is qualified.

[0038] It should be specifically noted that all parts inside the sealed box 1 are non-metallic materials with poor thermal conductivity to avoid affecting the accuracy of antenna testing.

[0039] Refer to Figure 1 and Figure 5 , the opening and closing part 3 includes two receiving grooves 30 symmetrically arranged along the width direction on the side wall of the feed inlet 2. Inside the receiving grooves 30, a closing plate 31 is installed through a first return spring 32. The opposite surfaces of the two closing plates 31 in the same feed inlet 2 are both arc-shaped.

[0040] Refer to Figure 1 and Figure 2 , the picking and clamping mechanism 5 includes two supporting and clamping parts 50 arranged symmetrically. The two supporting and clamping parts 50 are respectively used to clamp the antenna 7 and the label 8. At the top of the sealed box 1, there is a driving part 51 for driving the two supporting and clamping parts 50 to clamp the antenna 7 and the label 8 and move them up and down.

[0041] Insert the antenna 7 and the label 8 into the sealed box 1 from the two feed inlets 2 respectively. When the antenna 7 or the label 8 touches the arc-shaped ends of the two closing plates 31, the antenna 7 or the label 8 squeezes and pushes the two closing plates 31 to move into the corresponding receiving grooves 30 and squeeze the first return spring 32 to contract. When the antenna 7 and the label 8 enter the corresponding feed inlets 2, the feed inlets 2 are closed to avoid a large amount of hot air loss inside the sealed box 1. After the antenna 7 and the label 8 enter the sealed box 1, they gradually move onto the corresponding supporting and clamping parts 50. The supporting and clamping parts 50 center and limit the antenna 7 and the label 8. Then, the driving part 51 drives the two supporting and clamping parts 50 to clamp the antenna 7 and the label 8 and drive the antenna 7 and the label 8 to move downward. When the antenna 7 and the label 8 completely enter the sealed box 1, the two closing plates 31 in the feed inlets 2 automatically close the feed inlets 2 under the elastic force of the first return spring 32.

[0042] Refer toFigure 1 , Figure 2 and Figure 3 , the mobile test mechanism 6 includes two mounting brackets 60 arranged along the length direction of the sealed box 1. One of the mounting brackets 60 is fixedly connected to the sealed box 1, and a rangefinder 61 is installed at the bottom of the mounting bracket 60. The other mounting bracket 60 is slidably connected to the sealed box 1, and a translation driving source for driving the mounting bracket 60 is installed on the sealed box 1 (such as an electric telescopic rod installed outside the sealed box 1 with its telescopic end penetrating into the sealed box 1 and connected to the mounting bracket 60). Two limit seats 62 are installed at the top of both mounting brackets 60. The two limit seats 62 on the same mounting bracket 60 are used to support and limit the antenna 7 or the tag 8 clamped by the upper supporting and clamping part 50. A clamping part 63 for clamping the antenna 7 and the tag 8 supported on the limit seats 62 of the two mounting brackets 60 is also provided in the sealed box 1.

[0043] After the antenna 7 and the tag 8 enter the corresponding two limit seats 62 and abut against the bottom of the limit seats 62, the driving part 51 drives the supporting and clamping part 50 to release the antenna 7 and the tag 8. At this time, the supporting and clamping part 50 drives the clamping part 63 to limit and fix the antenna 7 and the tag 8 and lock the clamping part 63, so as to fix the antenna 7 and the tag 8 on the mobile test mechanism 6, realizing the function of converting and fixing the antenna 7 and the tag 8 from the picking and placing clamping mechanism 5 to the mobile test mechanism 6 and locking them through the clamping part 63; conversely, when removing the antenna 7 and the tag 8, the driving part 51 drives the supporting and clamping part 50 to clamp the antenna 7 and the tag 8, the clamping part 63 releases the antenna 7 and the tag 8, and then the driving part 51 drives the supporting and clamping part 50 to drive the antenna 7 and the tag 8 to move upward out of the sealed box 1, so as to replace the antenna 7 and the tag 8.

[0044] Refer to Figure 1 , Figure 2 and Figure 3 , the supporting and clamping part 50 includes an L-shaped bracket 501 provided on the driving part 51. A fixing plate 502 is installed at the top of the L-shaped bracket 501. Two limit clamping seats 503 symmetrically arranged along its length direction are slidably connected to the fixing plate 502. The limit clamping seats 503 are in a U shape. An adaptive centering and alignment component 504 is provided between the two vertical sections of the limit clamping seats 503. The two centering and alignment components 504 cooperate with the L-shaped bracket 501 to support and center-align the antenna 7 or the tag 8.

[0045] Refer to Figure 2 and Figure 4, the centering alignment component 504 includes spring grooves 520 opened on two opposite surfaces of the limit card seat 503. A guiding plate 521 is installed on the spring grooves 520 through a return spring 522. The top of the guiding plate 521 and one side located at the opening of the limit card seat 503 are both arc-shaped, and uniform distributed balls are installed on the opposite surfaces of the two guiding plates 521, so as to facilitate the antenna 7 or the tag 8 to enter between the corresponding two guiding plates 521.

[0046] In the initial state, the driving part 51 drives the distance between the corresponding two limit card seats 503 to be greater than the widths of the antenna 7 and the tag 8, so as to facilitate the antenna 7 and the tag 8 to enter between the corresponding two limit card seats 503; after the antenna 7 and the tag 8 enter the sealing box 1, the antenna 7 or the tag 8 moves downward along the two guiding plates 521 in the corresponding limit card seat 503, and the two guiding plates 521 perform centering positioning on the tag 8 or the antenna 7 in the thickness direction until the antenna 7 and the tag 8 are tightly abutted against the horizontal section of the corresponding L-shaped bracket 501. At this time, the driving part 51 drives the corresponding two limit card seats 503 to clamp and fix the antenna 7 and the tag 8 and drive the antenna 7 and the tag 8 to move downward, which not only realizes the feeding and conveying of the antenna 7 and the tag 8 but also can prevent the antenna 7 and the tag 8 from tilting and affecting the accuracy of the test.

[0047] Refer to Figure 1 、 Figure 2 And Figure 6 , the driving part 51 includes an inverted T-shaped frame 510 installed between two sliding grooves opened on the top of the sealing box 1 and two limit card seats 503 arranged along the length direction of the sealing box 1. The vertical section of the inverted T-shaped frame 510 slidably penetrates through the sliding groove. A double-acting cylinder 511 is also installed on the top of the sealing box 1. Sliders 512 are installed on both telescopic ends of the double-acting cylinder 511. A guiding groove 513 slidably connected with the slider 512 is opened on the vertical section of the inverted T-shaped frame 510. An adaptive sealing component is provided on the sliding groove. Two symmetrically arranged connecting frames 514 are slidably installed on the two inverted T-shaped frames 510 together. The connecting frames 514 are connected to the vertical section of the L-shaped bracket 501 through connecting bars. A lifting driving source (such as an electric slider) for driving the connecting frames 514 to lift is provided on the top of the sealing box 1.

[0048] The double-acting cylinder 511 drives the two inverted T-shaped frames 510 and the limit card seats 503 installed on the inverted T-shaped frames 510 to move until the corresponding two limit card seats 503 clamp and fix the tag 8 and the antenna 7. During the horizontal movement of the inverted T-shaped frame 510, the sealing component seals the sliding groove to prevent the heat in the sealing box 1 from leaking.

[0049] Then, the lifting drive source drives the connecting frame 514, the connecting bar, the L-shaped bracket 501 and the inverted T-shaped frame 510 to move downward. At this time, the slider 512 slides along the guiding groove 513, which neither affects the clamping of the antenna 7 and the label 8 by the supporting clamping part 50 nor affects the up and down movement of the antenna 7 and the label 8 driven by the supporting clamping part 50. Moreover, sealing gaskets 515 sleeved on the connecting bar are installed on the lower end surface of the connecting frame 514 and the connecting bar. When the connecting frame 514 moves downward, the sealing gasket 515 is pressed against the top of the sealing box 1. After the connecting frame 514 moves upward, the sealing gasket 515 located in the sealing box 1 abuts against the inner wall top of the sealing box 1, thereby sealing the sliding connection between the connecting bar and the sealing box 1.

[0050] Refer to Figure 1 and Figure 6 , the sealing assembly includes receiving grooves 530 opened on both sides of the inverted T-shaped frame 510 with the chute arranged along the thickness direction of the inverted T-shaped frame 510. A pressing plate 532 elastically abutted against the side wall of the inverted T-shaped frame 510 is installed in one of the receiving grooves 530 through a second return spring 531, and a movable sealing plate 533 is slidably connected in the other receiving groove 530. The movable sealing plate 533 is fixedly connected with the slider 512.

[0051] During the sliding process of the inverted T-shaped frame 510, the pressing plate 532 is always abutted against the side wall of the inverted T-shaped frame 510 under the elastic force of the second return spring 531. When the inverted T-shaped frame 510 moves horizontally, the double-acting cylinder 511 drives the slider 512 and the movable sealing plate 533 to move. The movable sealing plate 533 slides along the corresponding receiving groove 530, thereby sealing the chute and preventing the heat in the sealing box 1 from leaking during the test.

[0052] Refer to Figure 2 and Figure 5 , a plug lock assembly for locking the closing plate 31 is further installed on the connecting frame 514. The plug lock assembly includes a plug rod 540 installed on the connecting frame 514 through an ear plate. A jack 541 corresponding to the plug rod 540 is opened on the closing plate 31. The plug rod 540 penetrates through the sealing box 1 and the receiving groove 30 and is inserted into the jack 541.

[0053] When the connecting frame 514 moves downward and both the antenna 7 and the label 8 enter the sealing box 1, after the two closing plates 31 in the same feeding port 2 abut against each other, the connecting frame 514 drives the plug rod 540 to move downward until the plug rod 540 penetrates through the sealing box 1 and the receiving groove 30 and is inserted into the jack 541, thereby locking the closing plate 31 and preventing the closing plate 31 from being opened randomly during the test, which affects the accuracy of the test.

[0054] Refer to Figure 3The limit seat 62 is in a U-shape, and the tops of the two vertical sections of the limit seat 62 are both arc-shaped and the two arcs are arranged in an inverted eight-shaped shape, so that the antenna 7 or the tag 8 can be inserted between the two vertical sections of the limit seat 62 from the upper side.

[0055] See also Figure 2 and Figure 3 The clamping portion 63 includes a clamping plate 630 slidably connected to the limit seat 62. Two sliding plates 631 symmetrically arranged along the width direction of the sealing box 1 are installed on the inner wall of the sealing box 1 through an elastic member. The opposite surfaces of the two sliding plates 631 are provided with guide grooves 632, and a moving block 633 is installed on the guide groove 632. The moving block 633 and the limit seat 62 are jointly installed with a conversion push assembly. The top of the sliding plate 631 is provided with two T-slots 634 symmetrically arranged along the length direction thereof. The bottom of the limit clamping seat 503 is provided with an insert block 635 matching the T-slot 634 through an inclined plate.

[0056] When the limit card seat 503 moves downward, the insert block 635 is driven by the inclined plate to be inserted into the corresponding T-shaped groove 634. When the antenna 7 and the tag 8 enter between the two corresponding limit seats 62 and abut against the bottom of the limit seat 62, the two-way cylinder 511 drives the limit card seat 503 through the inverted T-shaped frame 510 to no longer clamp the antenna 7 and the tag 8. At the same time, the limit card seat 503 pushes the corresponding sliding plate 631 to move. When the sliding plate 631 moves, it drives the moving block 633 to move synchronously. The moving block 633 drives the clamping plate 630 to move toward the corresponding antenna 7 or tag 8 through the rotating push assembly between it and the limit seat 62. The two relative clamping plates 630 clamp and fix the corresponding antenna 7 or tag 8, so that the antenna 7 and the tag 8 are converted and fixed from the pick-and-place clamping mechanism 5 to the mobile test mechanism 6, and the sliding plate 631, the conversion push assembly and the clamping plate 630 are locked, thereby improving the stability of the antenna 7 and the tag 8 during the dynamic test process.

[0057] During the dynamic test, the mounting frame 60 slidably connected in the sealed box 1 drives the antenna 7 or tag 8 , the conversion push assembly and the moving block 633 fixed thereon to move along the guide groove 632 .

[0058] See also Figure 3 and Figure 8 The conversion push assembly includes racks 640 installed on the opposite surfaces of the clamping plate 630 and the moving block 633, a support frame is installed on the limit seat 62, and a gear 641 is rotatably connected to the support frame and meshes with the two racks 640 for transmission, a limit block 601 is slidably connected to the mounting frame 60, and a rib plate 602 is installed between the limit block 601 and the moving block 633.

[0059] When the sliding plate 631 drives the moving block 633 to move along the width direction of the sealing box 1, the moving block 633 drives the limiting block 601 to move through the rib plate 602, thereby increasing the stability of the movement of the sliding plate 631. And the moving block 633 drives the rack 640 connected thereto to move, so that the two racks 640 are engaged with the gear 641 to drive the clamping plate 630 to move towards the antenna 7 or the tag 8 until the clamping plate 630 abuts against the antenna 7 or the tag 8, so as to fix the antenna 7 or the tag 8 through the clamping plate 630 when the limit clamping seat 503 is opened.

[0060] Refer to Figure 2 、 Figure 3 and Figure 7 As shown in FIGS.

[0061] When fixing the tag 8 and the antenna 7, during the movement of the sliding plate 631, the rectangular block 652 moves along the limiting groove 651. During detection, the mounting bracket 60 slidably connected in the sealing box 1 drives the rectangular block 652 connected thereto to slide along the rectangular guide groove 650, so that the movement of the sliding plate 631 and the mounting bracket 60 supports and guides each other.

[0062] Refer to Figures 1-7 Before testing, for fixing: insert the antenna 7 and the tag 8 into the sealing box 1 respectively from the two feeding ports 2. When the antenna 7 or the tag 8 abuts against the arc ends of the two closing plates 31, the feeding ports 2 are opened. After the antenna 7 and the tag 8 enter the sealing box 1, they gradually move to the corresponding supporting and clamping parts 50. The supporting and clamping parts 50 center and limit the antenna 7 and the tag 8, and then the driving part 51 drives the two supporting and clamping parts 50 to clamp the antenna 7 and the tag 8 and drive the antenna 7 and the tag 8 to move downward. When the antenna 7 and the tag 8 completely enter the sealing box 1, the opening and closing part 3 automatically closes the feeding ports 2.

[0063] After the antenna 7 and the tag 8 enter the corresponding two limiting seats 62 and abut against the bottom of the limiting seats 62, the driving part 51 drives the supporting and clamping parts 50 to release the antenna 7 and the tag 8. At this time, the supporting and clamping parts 50 drive the clamping and fixing part 63 to limit and fix the antenna 7 and the tag 8 and lock the clamping and fixing part 63, so as to fix the antenna 7 and the tag 8 on the mobile testing mechanism 6.

[0064] During the test: First, drive the mounting bracket 60 connected thereto and the label 8 fixed on the mounting bracket 60 to be in close contact with the antenna 7 through the translation drive source, and heat up or cool down the inside of the sealed box 1 to the target temperature point through the temperature adjustment mechanism 4, and maintain it for at least 30 minutes to ensure that the antenna 7 and the label 8 are evenly heated. Then, the translation drive source drives the label 8 to gradually move away from the antenna 7, and controls the distance of each movement through the rangefinder 61. The distance is increased by 10 cm each time until the reader on the antenna 7 cannot identify the label 8, and record the maximum readable distance.

[0065] And during the test, at a fixed distance (such as 1 m), record the average RSSI value output by the reader of the antenna 7 (sampling continuously for 10 seconds).

[0066] Then restore the sealed box 1 to room temperature and repeat the above steps to test the antenna 7.

[0067] Finally, according to the calculation formula: attenuation rate of the reading distance = (maximum distance at room temperature - maximum distance at high temperature / low temperature) ÷ maximum distance at room temperature × 100%, so as to obtain the attenuation rate of the reading distance of the antenna 7. For industrial grade: ≤20%; for consumer grade ≤30%; if it exceeds the corresponding industrial grade or consumer grade attenuation rate, it means that the attenuation rate of the reading distance of the antenna 7 does not meet the requirements, and the antenna 7 and the label 8 can be directly removed by cooperating the mobile test mechanism 6 with the picking and placing clamping mechanism 5.

[0068] Judgment of the signal strength (RSSI) stability of the antenna 7: At the same distance, if the RSSI fluctuation range is ≤±3 dB, it means that the signal strength stability of the antenna 7 meets the standard.

[0069] If the attenuation distance of the reading distance of the antenna 7 meets the requirements, adjust the temperature inside the sealed box 1, adjust the temperature inside the sealed box 1 to the next temperature point, and repeat the above steps to make the antenna 7 and the label 8 in close contact, and continue to repeat the above steps to test the antenna 7.

[0070] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0071] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An RFID antenna thermal stability test device, characterized in that Comprising: A sealed box, on the side wall of which a transparent plate is installed, and on the top of the sealed box there are two feeding ports, and on the feeding ports there is an adaptive opening and closing part; A temperature regulating mechanism, which is arranged on the sealed box and is used to regulate the temperature inside the sealed box; A picking and placing clamping mechanism, which is arranged on the sealed box and includes two supporting and clamping parts arranged symmetrically. The two supporting and clamping parts are respectively used to clamp the antenna and the label. On the top of the sealed box there is a driving part for driving the two supporting and clamping parts to clamp the antenna and the label and move up and down; A moving and testing mechanism, which is arranged inside the sealed box and includes two mounting frames arranged along the length direction of the sealed box. One of the mounting frames is fixedly connected to the sealed box and a rangefinder is arranged on the mounting frame. The other mounting frame is slidably connected to the sealed box and a translation driving source is arranged on the sealed box. There are two limiting seats on both mounting frames. The two limiting seats on the same mounting frame are used to support and limit the antenna or label clamped by the supporting and clamping part above it. Inside the sealed box there is also a clamping part for clamping the antenna and the label supported on the limiting seats of the two mounting frames; When the supporting and clamping part is released, it drives the clamping part to limit and fix the antenna and the label and lock the clamping part.

2. The RFID antenna thermal stability test device according to claim 1, wherein: The opening and closing part includes two accommodating grooves symmetrically arranged along the width direction on the side wall of the feeding port. Inside the accommodating grooves, a closing plate is installed through a first return spring. The opposite surfaces of the two closing plates in the same feeding port are both arc-shaped.

3. The RFID antenna thermal stability test device according to claim 1, wherein: The supporting and clamping part includes an L-shaped bracket arranged on the driving part. On the top of the L-shaped bracket, a fixing plate is installed. On the fixing plate, two limiting clamping seats symmetrically arranged along its length direction are slidably connected. The limiting clamping seats are in a C shape. Between the two vertical sections of the limiting clamping seat, there is an adaptive centering and alignment component. The two centering and alignment components cooperate with the L-shaped bracket to support and center-align the antenna or the label.

4. The RFID antenna thermal stability test device according to claim 3, wherein: The driving part includes an inverted T-shaped frame installed between two sliding grooves opened on the top of the sealed box and two limiting clamping seats arranged along the length direction of the sealed box. The vertical section of the inverted T-shaped frame slidably penetrates through the sliding groove. On the top of the sealed box, a double-acting cylinder is also installed. On both telescopic ends of the double-acting cylinder, a slider is installed. A guiding groove for slidably connecting with the slider is opened on the vertical section of the inverted T-shaped frame. An adaptive sealing component is arranged on the sliding groove. On the two inverted T-shaped frames, two symmetrically arranged connecting frames are jointly installed. The connecting frames are connected to the vertical section of the L-shaped bracket through connecting bars. On the top of the sealed box, there is a lifting driving source for driving the connecting frames to lift.

5. The RFID antenna thermal stability test device according to claim 1, characterized in that: The clamping part includes a clamping plate slidably connected to the limiting seat. On the inner side wall of the sealed box, two sliding plates symmetrically arranged along the width direction of the sealed box are installed through elastic parts. On the opposite surfaces of the two sliding plates, guiding grooves are opened. On the guiding grooves, a moving block is installed. A conversion and pushing component is jointly installed on the moving block and the limiting seat. When the sliding plate moves, it drives the clamping plate to move through the conversion and pushing component. On the top of the sliding plate, two T-shaped grooves symmetrically arranged along its length direction are opened. On the bottom of the limiting clamping seat, an inserting block matched with the T-shaped groove is installed through an inclined plate.

6. The RFID antenna thermal stability test device according to claim 3, characterized in that: The centering alignment component includes spring grooves opened on two opposite surfaces of the limit clamping seat. A guiding plate is installed on the spring grooves through a return spring. The top of the guiding plate and one side located at the opening of the limit clamping seat are both arc-shaped, and uniform ball bearings are installed on the opposite surfaces of the two guiding plates.

7. The RFID antenna thermal stability test device according to claim 4, wherein: The sealing component includes receiving grooves opened on both sides of the sliding groove arranged along the thickness direction of the inverted T-shaped frame. A pressing plate elastically abutted against the side wall of the inverted T-shaped frame is installed in one of the receiving grooves through a second return spring, and a movable sealing plate is slidably connected in the other receiving groove. The movable sealing plate is fixedly connected to the slider.

8. The RFID antenna thermal stability testing device according to claim 5, wherein: The conversion pushing component includes racks installed on the opposite surfaces of the clamping plate and the moving block. A support frame is installed on the limit seat, and a gear meshing and driving with both racks is rotatably connected to the support frame.

9. The RFID antenna thermal stability test device according to claim 8, wherein: Guiding components are installed between the bottom of the sliding plate and the two mounting frames. The guiding component includes a rectangular guiding groove opened at the bottom of the sliding plate. Symmetrically arranged limiting grooves are opened at the tops of the two mounting frames. A rectangular block is slidably connected in the limiting groove. The rectangular block on the mounting frame fixedly connected to the sealing box is fixedly connected to the bottom of the sliding plate, and the rectangular block on the other mounting frame is slidably connected to the rectangular guiding groove.

10. The RFID antenna thermal stability test device according to claim 4, wherein: A plug lock component for locking the closing plate is further installed on the connecting frame. The plug lock component includes a plug rod installed on the connecting frame through an ear plate. A jack corresponding to the plug rod is opened on the closing plate. The plug rod penetrates through the sealing box and the receiving groove and is inserted into the jack.

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