A RFID antenna thermal stability test device

Abstract

The present invention relates to the technical field of RFID antenna performance testing, and specifically proposes an RFID antenna thermal stability testing device, comprising: a sealed box, a temperature regulating mechanism, a pick-and-place clamping mechanism, and a mobile testing mechanism. The present invention utilizes an opening and closing portion, a pick-and-place clamping mechanism, and a mobile testing mechanism in coordination. When replacing an antenna and a tag, the antenna and tag only need to be inserted into the pick-and-place clamping mechanism from corresponding feed ports. The pick-and-place clamping mechanism then cooperates with the mobile testing mechanism to perform replacement and clamping, thereby securing the antenna and tag to the mobile testing mechanism and enabling automatic entry, clamping, and replacement of the antenna and tag. This greatly improves the convenience of antenna thermal stability testing, eliminates the need for manual opening and closing of the sealed box, and prevents heat leakage within the sealed box and reduced antenna test accuracy.

Description

Technical Field

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

[0002] RFID antennas are key components in RFID systems for transmitting and receiving radio frequency signals. Their performance directly affects communication distance, stability, and environmental adaptability. Thermal stability is a key indicator for evaluating the performance reliability of RFID antennas in temperature-varying environments, while reading distance and signal strength are important indicators for determining the thermal stability of RFID antennas.

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

[0004] Signal Strength: Stable signal strength is a key indicator of good thermal stability of the RFID antenna. Under varying temperatures, the signal strength received and transmitted by the antenna should remain within a certain range, with minimal fluctuations. Large fluctuations in signal strength with temperature can lead to tag recognition errors or read failures, indicating poor antenna thermal stability.

[0005] When conducting a stability test on the antenna, the antenna and the tag need to be fixed in a sealed temperature chamber and then a dynamic test is performed. However, when fixing the antenna and the tag and removing them after the test is completed and then placing them again for fixed testing, the antenna and the tag need to be constantly disassembled and removed and the next antenna and tag need to be replaced for fixing. This is not only cumbersome, but also requires the sealed temperature chamber to be constantly opened, resulting in a deterioration in the sealing of the temperature chamber and affecting the accuracy of the antenna test. Summary of the Invention

[0006] In view of the above problems, an embodiment of the present invention provides an RFID antenna thermal stability testing device to solve the technical problems in the related art.

[0007] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides the following technical solution: an RFID antenna thermal stability testing device, comprising: a sealed box, a temperature adjustment mechanism, a pick-and-place clamping mechanism and a mobile testing mechanism, wherein a transparent plate is installed on the side wall of the sealed box, and two feed ports are provided on the top of the sealed box, and an adaptive opening and closing part is provided on the feed port.

[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 of the side wall of the feeding port. 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 feeding port are both arc-shaped.

[0010] The picking and placing clamping mechanism includes two supporting and clamping parts arranged symmetrically. The two supporting and clamping parts are respectively used for clamping 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 at 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 at the top of both mounting brackets. The two limiting seats on the same mounting bracket are used for supporting and limiting 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 at 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 U 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 distributed balls are installed on the opposite surfaces of the two guiding plates.

[0014] In one possible implementation, the driving part includes two slide grooves opened on the top of the sealing box and an inverted T-shaped frame installed between two limit brackets arranged along the length direction of the sealing box. The vertical section of the inverted T-shaped frame slides through the slide groove. A two-way cylinder is also installed on the top of the sealing box. Both telescopic ends of the two-way cylinder are equipped with sliders. The vertical section of the inverted T-shaped frame is provided with a guide groove slidably connected to the slider. The slide groove is provided with an adaptive sealing assembly. Two symmetrically arranged connecting frames are slidably installed on the two inverted T-shaped frames. The connecting frames are connected to the vertical section of the L-shaped bracket through a connecting bar. The top of the sealing box is provided with a lifting drive source (such as an electric slider) for driving the connecting frame to rise and fall.

[0015] In one possible implementation, the sealing assembly includes receiving grooves on both sides of the slide groove arranged along the thickness direction of the inverted T-shaped frame, wherein a support plate elastically pressed against the side wall of the inverted T-shaped frame is installed in one of the receiving grooves through a return spring 2, and a movable sealing plate is slidably connected in the other receiving groove, and the movable sealing plate is fixedly connected to the slider.

[0016] In one possible implementation, a latch assembly for locking the closing plate is also installed on the connecting frame, and the latch assembly includes an insertion rod installed on the connecting frame through an ear plate, and a socket corresponding to the insertion rod is opened on the closing plate. The insertion rod passes through the sealing box and the accommodating groove and is connected to the socket.

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

[0018] In one possible implementation, the clamping portion includes a clamping plate slidably connected to the limit seat, and 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 an elastic member, and the opposite surfaces of the two sliding plates are provided with guide grooves, and a moving block is installed on the guide groove. The moving block and the limit seat are jointly provided with a conversion push assembly, and the top of the sliding plate is provided with two T-slots symmetrically arranged along its length direction, and the bottom of the limit clamping seat is provided with an insert block matching the T-slot through an inclined plate.

[0019] In one possible implementation, the conversion push assembly includes racks installed on the opposite surfaces of the clamping plate and the moving block, a support frame is installed on the limit seat, a gear is rotatably connected to the support frame and is engaged with both racks for transmission, a limit block is slidably connected to the mounting frame, and a rib plate is installed between the limit block and the moving block.

[0020] In one possible implementation, a guide assembly is installed between the bottom of the sliding plate and the two mounting frames, and the guide assembly includes a rectangular guide groove opened at the bottom of the sliding plate, and symmetrically arranged limit grooves are opened at the tops of the two mounting frames, and rectangular blocks are slidably connected in the limit grooves. 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 guide groove.

[0021] The above one or more 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 cooperates with the opening and closing part, the pick-and-place clamping mechanism and the mobile testing mechanism. When replacing the antenna and the tag, it is only necessary to insert the antenna and the tag from the corresponding feed port into the pick-and-place clamping mechanism, and then replace and clamp them through the pick-and-place clamping mechanism and the mobile testing mechanism, so that the antenna and the tag are fixed on the mobile testing mechanism, and automatic clamping and replacement of the antenna and the tag are realized, which greatly improves the convenience of the antenna thermal stability test, and there is no need to manually open and close the sealed box, and there will be no problems of temperature leakage in the sealed box and reduced antenna test accuracy.

[0022] 2. The pick-and-place clamping mechanism of the present invention cooperates with the mobile testing mechanism to automatically complete the fixed clamping conversion between the antenna and the tag, realizing the function of automatic conversion and fixation between the antenna and the tag, greatly improving the efficiency of antenna testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

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

[0025] Figure 2 It is a three-dimensional structural diagram of the pick-and-place clamping mechanism, mobile testing mechanism, antenna and tag of the present invention.

[0026] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A.

[0027] Figure 4 It is a schematic diagram of a top cross-sectional structure of the position limiting holder and the centering alignment component of the present invention.

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

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

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

[0031] Figure 8 yes Figure 3 A partial enlarged schematic diagram of point B.

[0032] Reference numerals:

[0033] 1. Sealing box; 2. Feeding port; 3. Opening and closing part; 30. Accommodating groove; 31. Closing plate; 32. Return spring 1; 4. Temperature regulating mechanism; 5. Pick-up and clamping mechanism; 50. Supporting and clamping part; 501. L-shaped bracket; 502. Fixing plate; 503. Limiting seat; 504. Centering and positioning assembly; 520. Spring groove; 521. Guide plate; 522. Return spring; 51. Driving part; 510. Inverted T-shaped frame; 511. Bidirectional cylinder; 512. Slider; 513. Guide groove; 514. Connecting frame; 515. Sealing gasket; 530. Storage slot; 531, return spring 2; 532, abutment plate; 533, movable sealing plate; 540, insertion rod; 541, jack; 6, mobile testing 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, movable block; 634, T-slot; 635, insertion block; 640, rack; 641, gear; 650, rectangular guide groove; 651, limit groove; 652, rectangular block; 7, antenna; 8, tag. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See Figure 1 A RFID antenna thermal stability testing device includes: a sealed box 1, a temperature adjustment mechanism 4, a pick-and-place clamping mechanism 5 and a mobile testing mechanism 6. A transparent plate is installed on the side wall of the sealed box 1. Two feeding ports 2 are provided on the top of the sealed box 1, and an adaptive opening and closing part 3 is provided on the feeding port 2.

[0037] See Figure 1 The temperature regulating mechanism 4, the pick-and-place clamping mechanism 5 and the mobile testing mechanism 6 are all installed on the sealed box 1. The temperature regulating mechanism 4 is an existing technology, including a hot air inlet, a hot air exhaust port and a temperature measuring instrument. The hot air inlet, the hot air exhaust port and the temperature measuring instrument cooperate to regulate the temperature inside the sealed box 1.

[0038] During adjustment, the test temperature points in the temperature box are set according to the application scenario, industrial grade: -40℃, -20℃, 25℃, 85℃, 125℃; consumer grade: -25℃, 0℃, 25℃, 6℃, 85℃; and then the antenna 7 is dynamically moved at each temperature point through the cooperation of the pick-and-place clamping mechanism 5 and the mobile testing mechanism 6 to detect whether the thermal stability of the antenna 7 is qualified.

[0039] It is particularly noted that all parts in the sealed box 1 are made of non-metallic materials with poor thermal conductivity to avoid affecting the accuracy of the antenna test.

[0040] See Figure 1 and Figure 5 The opening and closing portion 3 includes two accommodating grooves 30 opened on the side wall of the feed port 2 and arranged symmetrically along its width direction. A closing plate 31 is installed in the accommodating groove 30 through a return spring 32. The opposite surfaces of the two closing plates 31 in the same feed port 2 are both arc-shaped.

[0041] See Figure 1 and Figure 2 The pick-and-place clamping mechanism 5 includes two symmetrically arranged supporting clamping parts 50, which are used to clamp the antenna 7 and the tag 8 respectively. The top of the sealed box 1 is provided with a driving part 51 that drives the two supporting clamping parts 50 to clamp the antenna 7 and the tag 8 and move up and down.

[0042] The antenna 7 and the tag 8 are inserted into the sealed box 1 from the two feed ports 2 respectively. When the antenna 7 or the tag 8 contacts the arc-shaped ends of the two closing plates 31, the antenna 7 or the tag 8 squeezes and pushes the two closing plates 31 to move into the corresponding accommodating grooves 30 and squeezes the return spring 32 to shrink. When the antenna 7 and the tag 8 enter the corresponding feed port 2, the feed port 2 is closed to prevent a large amount of heat from being lost in the sealed box 1. After entering the sealed box 1, the antenna 7 and the tag 8 gradually move to the corresponding supporting clamping part 50. The supporting clamping part 50 limits the centering of the antenna 7 and the tag 8, and then the driving part 51 drives the two supporting 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 sealed box 1, the two closing plates 31 in the feed port 2 automatically close the feed port 2 under the elastic force of the return spring 32.

[0043] Refer to Figure 1 and Figure 2 with Figure 3 As shown in FIGS. 1, 2 and 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 (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) is installed on the sealed box 1. Two limit seats 62 are installed on the tops 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 held by the support clamping part 50 above it. 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.

[0044] 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 support clamping part 50 to release the antenna 7 and the tag 8. At this time, the support 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 the antenna 7 and the tag 8 from the picking and placing clamping mechanism 5 to be fixed on 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 support 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 support clamping part 50 to move the antenna 7 and the tag 8 upward out of the sealed box 1, so as to replace the antenna 7 and the tag 8.

[0045] Refer to Figure 1 and Figure 2 with Figure 3 As shown in FIGS. 4 and 5, the support clamping part 50 includes an L-shaped bracket 501 provided on the driving part 51. A fixing plate 502 is installed on the top of the L-shaped bracket 501. Two limit clamping seats 503 arranged symmetrically 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.

[0046] Refer to Figure 2 and Figure 4The centering alignment component 504 includes spring grooves 520 opened on two opposite surfaces of the limit card seat 503, and a guide plate 521 is installed on the spring groove 520 through a return spring 522. The top of the guide plate 521 and one side located at the opening of the limit card seat 503 are both arc-shaped, and the opposite surfaces of the two guide plates 521 are installed with evenly arranged balls to facilitate the antenna 7 or tag 8 to enter between the corresponding two guide plates 521.

[0047] In the initial state, the driving unit 51 drives the distance between the two corresponding limit clamps 503 to be greater than the width of the antenna 7 and the label 8, so that the antenna 7 and the label 8 can enter between the two corresponding limit clamps 503; after the antenna 7 and the label 8 enter the sealed box 1, the antenna 7 or the label 8 moves downward along the two guide plates 521 in the corresponding limit clamps 503, and the two guide plates 521 center the label 8 or the antenna 7 in the thickness direction until the antenna 7 and the label 8 are tightly pressed against the horizontal section of the corresponding L-shaped bracket 501. At this time, the driving unit 51 drives the two corresponding limit clamps 503 to clamp and fix the antenna 7 and the label 8 and drive the antenna 7 and the label 8 to move downward, which not only realizes the feeding and conveying of the antenna 7 and the label 8, but also prevents the antenna 7 and the label 8 from tilting and affecting the accuracy of the test.

[0048] See Figure 1 、 Figure 2 and Figure 6 The driving part 51 includes two slide grooves opened on the top of the sealing box 1 and an inverted T-shaped frame 510 installed between two limit brackets 503 arranged along the length direction of the sealing box 1. The vertical section of the inverted T-shaped frame 510 slides through the slide groove. A two-way cylinder 511 is also installed on the top of the sealing box 1. The two telescopic ends of the two-way cylinder 511 are equipped with sliders 512. The vertical section of the inverted T-shaped frame 510 is provided with a guide groove 513 that is slidably connected to the slider 512. An adaptive sealing component is provided on the slide groove. Two symmetrically arranged connecting frames 514 are slidably installed on the two inverted T-shaped frames 510. The connecting frame 514 is connected to the vertical section of the L-shaped bracket 501 through a connecting bar. The top of the sealing box 1 is provided with a lifting drive source (such as an electric slider) that drives the connecting frame 514 to rise and fall.

[0049] The two inverted T-shaped frames 510 and the limit brackets 503 installed on the inverted T-shaped frames 510 are driven to move by the bidirectional cylinder 511 until the corresponding two limit brackets 503 clamp the tag 8 and the antenna 7. During the horizontal movement of the inverted T-shaped frame 510, the sealing component seals the slide groove to prevent heat leakage in the sealed box 1.

[0050] Then the lifting drive source drives the connecting frame 514, the connecting strip, the L-shaped bracket 501 and the inverted T-shaped frame 510 to move downward. At this time, the slider 512 slides along the guide groove 513, which neither affects the clamping of the antenna 7 and the tag 8 by the supporting clamping part 50, nor affects the up and down movement of the antenna 7 and the tag 8 by the supporting clamping part 50. The lower end surface of the connecting frame 514 and the connecting strip are both equipped with a sealing gasket 515 sleeved on the connecting strip. 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 contacts the top of the inner wall of the sealing box 1, thereby sealing the sliding connection between the connecting strip and the sealing box 1.

[0051] See Figure 1 and Figure 6 The sealing assembly includes receiving grooves 530 arranged on both sides of the slide along the thickness direction of the inverted T-shaped frame 510, in which a support plate 532 is installed in one of the receiving grooves 530 and elastically pressed against the side wall of the inverted T-shaped frame 510 through a return spring 2 531, and a movable sealing plate 533 is slidably connected in the other receiving groove 530, and the movable sealing plate 533 is fixedly connected to the slider 512.

[0052] During the sliding of the inverted T-shaped frame 510, the support plate 532 is always pressed against the side wall of the inverted T-shaped frame 510 under the elastic force of the return spring 2 531. When the inverted T-shaped frame 510 moves horizontally, the two-way cylinder 511 drives the slider 512 and the movable sealing plate 533 to move, and the movable sealing plate 533 slides along the corresponding storage groove 530, thereby sealing the slide groove to prevent heat leakage in the sealing box 1 during testing.

[0053] See Figure 2 and Figure 5 The connecting frame 514 is also equipped with a latch assembly for locking the closing plate 31. The latch assembly includes an insertion rod 540 installed on the connecting frame 514 through an ear plate. The closing plate 31 is provided with a socket 541 corresponding to the insertion rod 540. The insertion rod 540 passes through the sealing box 1 and the accommodating groove 30 and is connected to the socket 541.

[0054] When the connecting frame 514 moves downward and the antenna 7 and the tag 8 enter the sealing box 1, and the two closing plates 31 in the same feed port 2 are pressed against each other, the connecting frame 514 drives the insertion rod 540 to move downward until the insertion rod 540 penetrates the sealing box 1 and the receiving groove 30 and is plugged into the socket 541, thereby locking the closing plate 31 to prevent the closing plate 31 from opening at will during the test and affecting the accuracy of the test.

[0055] See 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 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.

[0056] See Figure 2 and Figure 3 The fixing 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 side 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. 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-shaped slots 634 symmetrically arranged along its length direction. The bottom of the limit clamping seat 503 is provided with an insert block 635 matching the T-shaped slot 634 through an inclined plate.

[0057] 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 contact 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, thereby converting the antenna 7 and the tag 8 from the pick-and-place clamping mechanism 5 to be fixed on the mobile testing mechanism 6 and locking the sliding plate 631, the conversion push assembly and the clamping plate 630, thereby improving the stability of the antenna 7 and the tag 8 during the dynamic test process.

[0058] During the dynamic test, the mounting frame 60 slidably connected to the sealed box 1 drives the antenna 7 or tag 8 , the conversion and pushing assembly, and the moving block 633 fixed thereon to move along the guide groove 632 .

[0059] See 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. The limiting block 601 is slidably connected to the mounting frame 60, and a rib 602 is installed between the limiting block 601 and the moving block 633.

[0060] 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 limit block 601 to move through the rib 602, thereby increasing the stability of the movement of the sliding plate 631, and the moving block 633 drives the rack 640 connected to it to move, so that the two racks 640 engage with the gear 641 to drive the clamping plate 630 to move toward the antenna 7 or tag 8 until the clamping plate 630 is tightly pressed against the antenna 7 or tag 8, thereby fixing the antenna 7 or tag 8 through the clamping plate 630 when the limit holder 503 is opened.

[0061] See Figure 2 、 Figure 3 and Figure 7 A guide assembly is installed between the bottom of the sliding plate 631 and the two mounting frames 60. The guide assembly includes a rectangular guide groove 650 opened at the bottom of the sliding plate 631, and symmetrically arranged limit grooves 651 are opened at the top of the two mounting frames 60. A rectangular block 652 is slidably connected in the limit groove 651. The rectangular block 652 on the mounting frame 60 fixedly connected to the sealing box 1 is fixedly connected to the bottom of the sliding plate 631, and the rectangular block 652 on the other mounting frame 60 is slidably connected to the rectangular guide groove 650.

[0062] When fixing the tag 8 and the antenna 7, the sliding plate 631 moves along the limit groove 651 through the rectangular block 652 during movement. During detection, the mounting frame 60 slidably connected to 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 frame 60 supports and guides each other.

[0063] See Figure 1-Figure 7 , fixation before testing: insert the antenna 7 and tag 8 into the sealing box 1 from the two feed ports 2 respectively. When the antenna 7 or tag 8 contacts the arc-shaped ends of the two closing plates 31, the feed port 2 opens. After the antenna 7 and tag 8 enter the sealing box 1, they gradually move to the corresponding supporting clamping parts 50. The supporting clamping parts 50 center the antenna 7 and tag 8, and then the driving part 51 drives the two supporting clamping parts 50 to clamp the antenna 7 and tag 8 and drive the antenna 7 and tag 8 to move downward. When the antenna 7 and tag 8 completely enter the sealing box 1, the opening and closing part 3 automatically closes the feed port 2.

[0064] When the antenna 7 and the tag 8 enter the corresponding two limit seats 62 and are tightly pressed against the bottom of the limit seats 62, the driving part 51 drives the supporting clamping part 50 to loosen the antenna 7 and the tag 8. At this time, the supporting 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, thereby fixing the antenna 7 and the tag 8 on the mobile testing mechanism 6.

[0065] During the test: first, the mounting frame 60 connected to it and the tag 8 fixed on the mounting frame 60 are driven by the translation drive source to be in close contact with the antenna 7, and the temperature inside the sealed box 1 is raised or lowered to the target temperature point by the temperature adjustment mechanism 4, and maintained for at least 30 minutes to ensure that the antenna 7 and the tag 8 are heated evenly. Then the translation drive source drives the tag 8 to gradually move away from the antenna 7, and the distance of each movement is controlled by the rangefinder 61, and the distance is increased by 10 cm each time until the reader on the antenna 7 cannot recognize the tag 8, and the maximum readable distance is recorded.

[0066] During the test, at a fixed distance (eg, 1 m), the average RSSI value output by the antenna 7 reader is recorded (sampling is continued for 10 seconds).

[0067] The sealed box 1 is then restored to normal temperature, and the above steps are repeated to test the antenna 7 .

[0068] Finally, according to the calculation formula: reading distance attenuation rate = (maximum distance at normal temperature - maximum distance at high temperature / low temperature) ÷ maximum distance at normal temperature × 100%, the attenuation rate of the reading distance of the antenna 7 is obtained, industrial grade: ≤20%; consumer grade ≤30%; if it exceeds the corresponding industrial grade or consumer grade attenuation rate, it means that the reading distance attenuation rate of the antenna 7 does not meet the requirements, and the antenna 7 and the tag 8 can be directly removed by cooperating with the mobile testing mechanism 6 and the pick-and-place clamping mechanism 5.

[0069] Signal strength (RSSI) stability assessment for antenna 7: At the same distance, if the RSSI fluctuation range is ≤±3dB, it means that the signal strength stability of antenna 7 meets the standard.

[0070] If the reading distance attenuation of the antenna 7 meets the requirements, 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 tag 8 close together, and continue to repeat the above steps to test the antenna 7.

[0071] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0072] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0073] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A RFID antenna thermal stability test device, characterized in that: Comprising: A sealed box, with a transparent plate installed on the side wall of the sealed box, and two feeding ports provided on the top of the sealed box, and an adaptive opening and closing part is provided on the feeding port; A temperature regulating mechanism, arranged on the sealed box, for regulating the temperature inside the sealed box; A picking and placing clamping mechanism, arranged on the sealed box, including two supporting and clamping parts arranged symmetrically, and the two supporting and clamping parts are respectively used for clamping the antenna and the label, and 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; A moving testing mechanism, arranged inside the sealed box, including 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 provided on the mounting bracket, the other mounting bracket is slidably connected to the sealed box and a translation driving source is provided on the sealed box, two limiting seats are provided on both mounting brackets, and the two limiting seats on the same mounting bracket are used for supporting and limiting the antenna or label clamped by the supporting and clamping part above it, and 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; When the supporting and clamping part is loosened, it drives the clamping part to limit and fix the antenna and the label and locks the clamping part.

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

3. The RFID antenna thermal stability testing device according to claim 2, characterized in that: The supporting and clamping part includes an L-shaped bracket arranged on the driving part, a fixing plate is installed on the top of the L-shaped bracket, and two limiting clamping seats symmetrically arranged along the length direction are slidably connected to the fixing plate, the limiting clamping seat is in a U shape, and an adaptive centering and alignment component is arranged between the two vertical sections of the limiting clamping seat, and the two centering and alignment components cooperate with the L-shaped bracket to support and center-align the antenna or label.

4. The RFID antenna thermal stability testing device according to claim 3, characterized in that: 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, a double-acting cylinder is also installed on the top of the sealed box, sliders are installed on both telescopic ends of the double-acting 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 component is provided on the sliding groove, two symmetrically arranged connecting frames are jointly installed on the two inverted T-shaped frames, the connecting frame is connected to the vertical section of the L-shaped bracket through a connecting bar, and a lifting driving source for driving the connecting frame to lift is provided on the top of the sealed box.

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

6. The RFID antenna thermal stability testing device according to claim 3, characterized in that: The centering alignment component includes spring grooves opened on two opposite surfaces of the limit card seat, and a guide plate is installed on the spring groove through a reset spring. The top of the guide plate and one side located at the opening of the limit card seat are both arc-shaped, and evenly arranged balls are installed on the opposite surfaces of the two guide plates.

7. The RFID antenna thermal stability testing device according to claim 4, characterized in that: The sealing assembly includes receiving grooves on both sides of the slide groove arranged along the thickness direction of the inverted T-shaped frame, one of the receiving grooves is equipped with a support plate that elastically presses against the side wall of the inverted T-shaped frame through a return spring, and the other receiving groove is slidably connected to a movable sealing plate, which is fixedly connected to the slider.

8. The RFID antenna thermal stability testing device according to claim 5, characterized in that: The conversion and pushing assembly 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 that is rotatably connected to the support frame and meshes with the two racks for transmission.

9. The RFID antenna thermal stability testing device according to claim 8, characterized in that: A guide assembly is installed between the bottom of the sliding plate and the two mounting frames. The guide assembly includes a rectangular guide groove opened at the bottom of the sliding plate. The tops of the two mounting frames are opened with symmetrically arranged limit grooves. Rectangular blocks are slidably connected in the limit grooves. 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 guide groove.

10. The RFID antenna thermal stability testing device according to claim 4, characterized in that: The connecting frame is also equipped with a latch assembly for locking the closing plate. The latch assembly includes an insertion rod installed on the connecting frame through an ear plate. The closing plate is provided with a socket corresponding to the insertion rod. The insertion rod passes through the sealing box and the accommodating groove and is plugged into the socket.

Images