A testing device for a single-ended glass sensor

Abstract

This application relates to the technical field of resistance testing devices, and provides a testing device for single-ended glass sensors, including a frame, a first turntable, a first magnetic block, a combing assembly, a wire separating assembly, a feeding assembly, a second turntable, a lifting block, a second magnetic block, a guide block, a guide rail, a constant temperature oil bath, a resistance tester, and a feeding assembly. Both the first and second turntables are rotatably connected to the frame. The first magnetic block is disposed on the first turntable for vertically adsorbing NTCs. The combing assembly is used to brush the pins of the NTCs on the first magnetic block, and the wire separating assembly is used to separate the two brushed pins. The feeding assembly is used to push the NTCs on the first magnetic block towards the second magnetic block. The resistance tester is used to contact the pins of the NTCs and perform automatic resistance measurement. The feeding assembly is used to unload the tested NTCs. This application has the effect of conveniently testing the resistance of single-ended glass NTC sensors.

Description

Technical Field

[0001] This application relates to the field of resistance testing equipment technology, and in particular to a testing device for a single-ended glass sensor. Background Technology

[0002] A single-ended glass sensor (usually referring to a single-ended glass-encapsulated NTC thermistor) is a high-precision temperature sensing element that encapsulates an NTC thermistor chip within a glass shell and employs a single-ended lead structure. "Single-ended" indicates that the lead extends from only one end of the glass package, unlike axial lead packaging (leads from both ends). "Glass" refers to the use of high-temperature resistant glass material for hermetically sealed packaging, protecting the internal thermistor chip from environmental influences. Single-ended glass sensors are high-precision, high-temperature resistant, and highly stable temperature measurement elements. Their core characteristic is that the resistance decreases exponentially with increasing temperature, making them widely used in various temperature measurement and control applications.

[0003] After NTC single-ended glass sensors complete all manufacturing processes such as chip packaging, electrode forming, and lead fabrication, they typically consist of a glass head and two pins extending from the glass head. Accurate resistance testing is an essential final inspection step before shipment, used to screen out defective products with resistance deviations, open circuits, short circuits, or abnormal performance, ensuring product consistency and reliability.

[0004] Because NTC single-ended glass sensors are precision miniature devices, small in size and fragile in structure, and are actually produced in large-scale continuous production, traditional manual inspection methods have significant drawbacks: relying on manual clamping, placement, and contact testing of each piece is slow, labor-intensive, and cannot meet the output requirements of large-scale automated production lines, thus requiring improvement. Summary of the Invention

[0005] To facilitate resistance testing of NTC single-ended glass sensors and improve production efficiency, this application provides a testing device for single-ended glass sensors.

[0006] The testing device for a single-ended glass sensor provided in this application adopts the following technical solution: A testing device for single-ended glass sensors includes a frame, a first turntable, a first magnetic block, a combing assembly, a branching assembly, a feeding assembly, a second turntable, a lifting block, a second magnetic block, a guide block, a guide rail, a constant temperature oil bath, a resistance tester, and a feeding assembly. The first turntable is rotatably connected to the frame, and the axis of rotation of the first turntable is vertical. The first magnetic block is disposed on the first turntable for vertically adsorbing NTCs, and the first magnetic blocks are spaced apart along the rotation direction of the first turntable. The combing component and the splitting component are arranged sequentially along the rotation direction of the first turntable. The combing component is used to brush the pins of the NTC on the first magnetic block, and the splitting component is used to separate the two pins after brushing. The second turntable is rotatably connected to the frame and located on one side of the first turntable. The lifting block is slidably connected to the second turntable in the vertical direction. The second magnetic block and the guide block are both provided on the lifting block. The guide block is located above the second magnetic block. The magnetic force of the second magnetic block is greater than that of the first magnetic block. The pushing component is located at the junction of the first turntable and the second turntable, and is used to push the NTC on the first magnetic block toward the second magnetic block; The guide rail is fixedly mounted on the outer periphery of the second turntable. The guide rail has a track groove. When the second turntable drives the lifting block to rotate, the guide block is always located in the track groove. The track groove is provided with an inverted isosceles trapezoidal section, which is used to change the vertical height of the guide block relative to the frame. The constant temperature oil tank is located below the track groove and is used to immerse the NTC on the second magnetic block. The resistance tester and the unloading assembly are arranged sequentially along the rotation path of the second turntable. The resistance tester is used to contact the pins of the NTC and perform automatic resistance measurement, and the unloading assembly is used to unload the tested NTC.

[0007] By adopting the above technical solution, this device adopts a dual-rotor circulating structure. The NTC single-ended glass sensor is vertically adsorbed and fixed by the first magnetic blocks arranged at intervals on the first rotor. There is no need for manual clamping and placement of each piece, and the workpiece can be continuously and automatically fed and transferred.

[0008] As the first turntable rotates, the combing component brushes and organizes the pins of the NTC, and then the splitter component precisely separates the two pins, effectively avoiding poor test contact caused by pin tangling and merging, and doing a good pre-organization process for subsequent resistance testing.

[0009] Next, the pusher assembly pushes the workpiece from the first magnetic block to the second magnetic block with stronger magnetic force, completing a smooth transfer. The positioning during the transfer process is reliable and it is not easy to fall off. When the second turntable rotates, the guide block slides along the track groove of the guide rail. The path change of the inverted isosceles trapezoidal segment of the track groove drives the lifting block to rise and fall automatically, thereby changing the vertical position of the second magnetic block. This allows the glass head of the NTC to be automatically immersed in the constant temperature oil bath for constant temperature environment calibration, avoiding the interference of ambient temperature fluctuations on the resistance test results and greatly improving the detection accuracy. Subsequently, the workpiece flows with the turntable to the resistance tester station, realizing automatic pin docking and automatic resistance detection.

[0010] Finally, the unloading component completes the automatic unloading, realizing the fully automated operation of loading, line management, transfer, constant temperature pretreatment, resistance testing and unloading. It completely replaces the traditional manual contact testing mode, greatly reduces the intensity of manual labor, has a fast detection speed and strong flow continuity, and can perfectly match the production rhythm of large-scale automated production lines. At the same time, the standardized process operation ensures the consistency and reliability of the sensor detection results of each batch.

[0011] Preferably, the combing assembly includes a first cylinder, a tray, a first translation seat, a limiting plate, a brush, and a second cylinder. The first cylinder is mounted on the frame, and the tray is connected to the first cylinder. The first cylinder is used to control the up and down movement of the tray, and the tray is used to support the glass head of the NTC. The first translation seat is horizontally movably connected to the frame. The limiting plate and the second cylinder are both located on the first translation seat. The brush is connected to the second cylinder and is used to brush the pin. The second cylinder is used to control the brush to move up and down. A limiting groove is provided on the limiting plate. The limiting groove is located above the support plate and is used to limit the end of the pin.

[0012] By adopting the above technical solution, the first cylinder can drive the pallet to move up and down, supporting and limiting the glass head of the NTC sensor, effectively preventing the sensor from shifting, tilting or shaking during the brush brushing process, and ensuring the stability of the workpiece posture during combing.

[0013] When the first magnetic block on the first turntable moves to the position corresponding to the combing assembly, the first translation seat moves horizontally and approaches the first turntable, causing the brush to contact the pins. Simultaneously, the limiting plate also approaches the NTC. The limiting groove on the limiting plate constrains and limits the pin ends, preventing the pins from swinging or misaligning during the brushing operation. The movement of the first translation seat can be driven by a linear actuator, such as a linear cylinder or an electric push rod; these are conventional technologies.

[0014] Next, the second cylinder drives the brush to move vertically from top to bottom to sweep and comb the pins, straightening their arrangement and laying a good foundation for subsequent wire splitting and resistance testing.

[0015] Preferably, the wire separating assembly includes a second translation seat, a third cylinder, a connecting block, a slider, a roller, a spring, and a wire separating pin. The second translation seat is horizontally movably connected to the frame. The third cylinder is disposed on the second translation seat and connected to the connecting block. The third cylinder controls the horizontal movement of the connecting block. The sliders are slidably connected to the second translation seat, and two are symmetrically arranged. The two ends of the spring are respectively connected to the two sliders. The rollers are arranged on the sliders. The two sides of the connecting block are provided with inclined sides, and the two inclined sides abut against the two rollers respectively. The two sliders are provided with the dividing pins. When the spring is in its natural state, the two dividing pins overlap vertically. When the connecting block moves closer to the first turntable, the two sliders move away from each other, and the spring is stretched.

[0016] By adopting the above technical solution, the second translation seat can achieve horizontal position adjustment, which facilitates the precise alignment of the entire wiring assembly with the NTC sensor pins rotating on the first turntable. The third cylinder drives the connecting block to move horizontally. Relying on the abutment and cooperation between the inclined surfaces of the two sides of the connecting block and the inclined surfaces of the rollers on the slider, the horizontal driving force is smoothly converted into the opposing sliding motion of the two sliders. The transmission structure is simple and the action is synchronous and smooth.

[0017] A spring is installed between the two sliders. Under normal conditions, the spring's own elasticity keeps the two dividing pins overlapping and closed, making it easy for the dividing pins to be inserted smoothly into the gap between the two pins. When the connecting block moves forward and pushes the sliders to separate, it drives the two dividing pins to open outwards synchronously, accurately separating the two pins that are wrapped together, resulting in a neat and uniform spacing between the dividing pins. After the dividing is completed, the third cylinder resets, and the spring can pull the two sliders to automatically return to their original positions, allowing the dividing pins to close and reset, which is convenient for continuous operation.

[0018] Preferably, the pushing assembly includes a fourth cylinder and a pusher plate, the pusher plate being connected to the fourth cylinder for horizontally pushing the NTC.

[0019] By adopting the above technical solution, the fourth cylinder controls the horizontal movement of the push plate, which accurately and smoothly pushes the NTC sensor after combing and splitting to the second magnetic block, realizing the automatic transfer of the workpiece between the first turntable and the second turntable.

[0020] Preferably, the unloading assembly includes a rotary cylinder, an electrically controlled permanent magnet plate, and an unloading box. The rotary cylinder is connected to the electrically controlled permanent magnet plate and is used to drive the electrically controlled permanent magnet plate to make arc motion. The electrically controlled permanent magnet plate is used to attract NTC on the second magnetic block. The unloading box is located below the electrically controlled permanent magnet plate and is used to receive the NTC after testing.

[0021] By adopting the above technical solution, the rotary cylinder can drive the electronically controlled permanent magnet plate to perform arc rotation, which can accurately align the NTC sensor on the second turntable that has completed the resistance test; the electronically controlled permanent magnet plate can stably attract the sensor on the second magnetic block. The magnetic attraction method is flexible and has no hard impact, which can effectively protect the NTC glass end and pin from damage; when the rotary cylinder drives the electronically controlled permanent magnet plate to be transferred to the top of the unloading box, the magnetic state can be switched by electronic control, so that the sensor can automatically detach and fall into the unloading box below, realizing the automatic unloading and orderly collection of the workpiece after testing.

[0022] Preferably, it also includes a CCD camera, which is located between the resistance tester and the feeding assembly, for detecting the NTC on the second magnetic block.

[0023] By adopting the above technical solution, the CCD camera can perform real-time visual image acquisition and inspection of the NTC sensor on the second magnetic block after resistance testing. It can accurately identify appearance and assembly defects such as broken sensor glass ends, bent and deformed pins, positional deviation, missing materials, etc., and realize dual quality control of electrical resistance testing and appearance visual inspection. This makes up for the shortcomings of single resistance testing in screening appearance defects, and greatly improves the accuracy of full product inspection and the level of good product control.

[0024] CCD vision inspection boasts a high degree of automation and fast recognition response, seamlessly matching the rotation rhythm of the entire machine's turntable. It eliminates the need for manual visual re-inspection, reducing the probability of missed or false inspections and saving labor costs. Simultaneously, it can work with the back-end unloading components to achieve accurate classification and sorting of good and defective products, perfecting the integrated function of automated detection, testing, and sorting throughout the entire equipment process, ensuring consistent product quality.

[0025] Preferably, it further includes a fifth cylinder, a sixth cylinder, and a splitter rod. The fifth cylinder is located between the first turntable and the second turntable and is connected to the sixth cylinder. It is used to control the horizontal movement of the sixth cylinder. The splitter rod is connected to the sixth cylinder. The sixth cylinder is used to control the vertical movement of the splitter rod. The splitter rod is used to perform secondary splitting of the NTC pins on the second magnetic block.

[0026] By adopting the above technical solution, the fifth cylinder can drive the sixth cylinder to perform horizontal displacement, achieving precise alignment between the wire separator and the NTC sensor pins on the second magnetic block. The sixth cylinder controls the wire separator to move up and down, allowing it to precisely insert between the two pins to perform a secondary wire separation. This secondary wire separation by the wire separator can realign the pin spacing and orientation, ensuring the two pins remain separated. The NTC sensor, after this secondary wire separation, is immersed in a constant-temperature oil bath, effectively avoiding poor contact and misjudgment of resistance values ​​by the resistance tester caused by pins coming together, thus improving the accuracy and stability of resistance testing.

[0027] Preferably, it also includes a feeding box and a feeding assembly, with the NTC placed inside the feeding box and the feeding assembly located near the feeding box for transferring a single NTC to the first magnetic block.

[0028] By adopting the above technical solution, the feeding box can centrally and neatly store a large number of NTC sensors to be tested, realizing centralized collection and stacking of materials; the supporting feeding component can pick up individual NTC sensors one by one from the upper feeding box and accurately transfer them to the first magnetic block of the first turntable, realizing automated and orderly single-sensor feeding of the equipment and improving production efficiency.

[0029] Preferably, the feeding assembly includes a telescopic rod, a suction head, a tilting cylinder, and a transfer plate. The telescopic rod is vertically movable on the frame. The suction head is mounted on the telescopic rod and is used to adsorb the glass head of NTC in the feeding box. The suction nozzle of the suction head is V-shaped and can only hold a single NTC. The tilting cylinder is located between the first turntable and the telescopic rod and can move horizontally. The transfer plate is connected to the piston rod of the tilting cylinder and is used to pick up the NTC on the suction head.

[0030] By adopting the above technical solution, the telescopic rod can drive the suction head to move up and down, which can flexibly reach into the feeding box to pick up materials and adapt to NTC sensors with different stacking heights in the box; the suction head adopts a V-shaped suction port structure, which has a limiting and adapting function, and can accurately pick up only one NTC at a time. At this time, the glass head faces upward, which effectively avoids picking up multiple materials at one time, eliminates the situation of stacking and jamming, and ensures orderly feeding of single items.

[0031] After the suction head picks up the NTC, the tilting cylinder, controlled by the linear actuator, moves horizontally and approaches the suction head, and the transfer plate picks up a single NTC from the suction head. Next, the tilting cylinder controls the transfer plate to rotate 180°, so the NTC, previously with its glass head facing upwards, now faces downwards. Finally, the tilting cylinder moves away from the loading box and approaches the first turntable, where the first magnetic block attracts the NTC from the transfer plate, completing the loading process.

[0032] In summary, this application includes at least one of the following beneficial technical effects: (1) The dual turntable multi-station flow layout is adopted, and magnetic adsorption and collaborative operation of each component are combined to realize the full automation of the NTC sensor from feeding, wire arrangement, constant temperature oil immersion, resistance test to unloading, replacing manual operation, greatly improving detection efficiency, and adapting to large-scale production line operation.

[0033] (2) By setting up a combing component, a branching component and a secondary branching structure, the sensor pins are swept and separated in a regular manner to avoid pins from getting tangled and clustered, effectively preventing poor test contact and ensuring accurate and stable resistance detection.

[0034] (3) Combined with CCD vision inspection, magnetic flexible transfer and unloading structure, it can not only avoid workpiece collision damage during transfer, but also realize dual detection of electrical resistance and appearance defects, thereby improving the product quality control accuracy and good product screening effect. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the test device in the embodiments of this application; Figure 2 This is a schematic diagram of the test device from another perspective in the embodiments of this application; Figure 3 This is a partial structural schematic diagram of the test device in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the first turntable, the combing component, and the branching component in the embodiments of this application; Figure 5 This is a schematic diagram of the combing component in this embodiment of the application, omitting the second turntable.

[0036] Reference numerals: 1. Frame; 2. First turntable; 3. First magnetic block; 4. Combing assembly; 41. First cylinder; 42. Support plate; 43. First translation seat; 44. Limiting plate; 45. Brush; 46. Second cylinder; 5. Separating assembly; 51. Second translation seat; 52. Third cylinder; 53. Connecting block; 54. Slider; 55. Roller; 56. Spring; 57. Separating needle; 6. Pushing assembly; 61. Fourth cylinder; 62. Push plate; 7. Second turntable ; 8. Lifting block; 9. Second magnetic suction block; 10. Guide block; 11. Guide rail; 12. Constant temperature oil bath; 13. Resistance tester; 14. Unloading assembly; 141. Rotary cylinder; 142. Electro-controlled permanent magnet plate; 143. Unloading box; 15. Fifth cylinder; 16. Sixth cylinder; 17. Dividing rod; 18. CCD camera; 19. Loading box; 20. Loading assembly; 201. Telescopic rod; 202. Suction head; 203. Tilting cylinder; 204. Transfer plate. Detailed Implementation

[0037] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0038] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0041] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0042] This application discloses a testing apparatus for a single-ended glass sensor. (Refer to...) Figures 1 to 3 The testing device includes a frame 1, a first turntable 2, a first magnetic block 3, a combing assembly 4, a branching assembly 5, a pushing assembly 6, a second turntable 7, a lifting block 8, a second magnetic block 9, a guide block 10, a guide rail 11, a constant temperature oil tank 12, a resistance tester 13, and a feeding assembly 14.

[0043] The frame 1 serves as a carrier and is fixedly installed on the ground. A first turntable 2 is rotatably connected to the frame 1, with its axis of rotation vertical. A first magnetic block 3 is fixedly installed on the first turntable 2 for vertically attracting NTCs. Several first magnetic blocks 3 are provided, spaced apart along the rotation direction of the first turntable 2. A combing assembly 4 and a wire separating assembly 5 are sequentially arranged along the rotation direction of the first turntable 2. The combing assembly 4 is used to brush the pins of the NTCs on the first magnetic blocks 3, and the wire separating assembly 5 is used to separate the brushed pins.

[0044] Specifically, in combination Figure 4The combing assembly 4 includes a first cylinder 41, a support plate 42, a first translation seat 43, a limiting plate 44, a brush 45, and a second cylinder 46. The first cylinder 41 is mounted on the frame 1. The support plate 42 is connected to the piston rod of the first cylinder 41. The first cylinder 41 is used to control the up and down movement of the support plate 42. The support plate 42 is used to support the glass head of the NTC and prevent the sensor from shifting, tilting, or shaking during the brush 45 brushing the pins, thus ensuring the stability of the workpiece posture during combing.

[0045] The first translation seat 43 is horizontally movably connected to the frame 1. The movement of the first translation seat 43 can be driven by a linear actuator, such as a linear cylinder or an electric push rod, which are conventional technologies. The limiting plate 44 and the second cylinder 46 are both mounted on the first translation seat 43. The brush 45 is connected to the piston rod of the second cylinder 46 and is used to brush the pins. The second cylinder 46 controls the up-and-down movement of the brush 45. A limiting groove is provided on the limiting plate 44, located above the support plate 42, to limit the end of the pin. When the first magnetic block 3 on the first turntable 2 moves to the position corresponding to the combing assembly 4, the first translation seat 43 moves horizontally and approaches the first turntable 2, causing the brush 45 to contact the pin; simultaneously, the limiting plate 44 also approaches the NTC. The limiting groove on the limiting plate 44 can constrain and limit the end of the pin, preventing the pin from swinging or misaligning during the brushing operation. Next, the second cylinder 46 drives the brush 45 to move vertically from top to bottom to sweep and comb the pins, straighten the pin arrangement, and lay a good foundation for subsequent wire splitting and resistance testing.

[0046] The wire separating assembly 5 includes a second translation base 51, a third cylinder 52, a connecting block 53, a slider 54, a roller 55, a spring 56, and a wire separating pin 57. The second translation base 51 is horizontally movably connected to the frame 1. The third cylinder 52 is mounted on the second translation base 51 and connected to the connecting block 53, controlling the horizontal movement of the connecting block 53. Two sliders 54 are slidably connected to the second translation base 51, and the direction of movement of the sliders 54 is perpendicular to the direction of movement of the connecting block 53. The two ends of the spring 56 are respectively connected to the two sliders 54. The roller 55 is fixedly mounted on the sliders 54. The connecting block 53 has beveled edges on both sides, which abut against the two rollers 55 respectively. Both sliders 54 are equipped with thread dividers 57. When the spring 56 is in its natural state, the two thread dividers 57 overlap vertically. When the connecting block 53 moves in the direction close to the first turntable 2, the two sliders 54 are pushed away from each other by the connecting block 53, and the spring 56 is stretched at this time.

[0047] The second translation seat 51 can be adjusted horizontally, facilitating precise alignment of the wire separating assembly 5 with the NTC sensor pins rotating on the first turntable 2. The third cylinder 52 drives the connecting block 53 to move horizontally. The horizontal driving force is smoothly converted into the opposing sliding motion of the two sliders 54 by the contact between the inclined surfaces of the two sides of the connecting block 53 and the inclined surfaces of the rollers 55 on the sliders 54. When the connecting block 53 moves forward and pushes the sliders 54 to separate, it drives the two wire separating pins 57 to open outwards synchronously, precisely separating the two coiled pins completely, resulting in a neat and uniform wire spacing. After the wire separation is completed, the third cylinder 52 resets, and the spring 56 can pull the two sliders 54 to automatically return to their original positions, causing the wire separating pins 57 to retract and reset, facilitating continuous operation.

[0048] The second turntable 7 is rotatably connected to the frame 1 and is located on one side of the first turntable 2. The axis of rotation of the second turntable 7 is parallel to the axis of rotation of the first turntable 2. The lifting block 8 is slidably connected to the second turntable 7 in the vertical direction. The second magnetic block 9 and the guide block 10 are both fixedly connected to the lifting block 8. The guide block 10 is located directly above the second magnetic block 9. The magnetic force of the second magnetic block 9 is greater than that of the first magnetic block 3. Several lifting blocks 8 are provided, and each lifting block 8 is parallel to each other and spaced apart along the circumference of the second turntable 7.

[0049] The pusher assembly 6 is installed at the junction of the first turntable 2 and the second turntable 7, and is used to push the NTC on the first magnetic block 3 towards the second magnetic block 9. The pusher assembly 6 includes a fourth cylinder 61 and a push plate 62. The push plate 62 is connected to the piston rod of the fourth cylinder 61 and is used to horizontally push the NTC. The guide rail 11 is fixedly installed on the frame 1 and is arranged along the outer periphery of the second turntable 7. When the second turntable 7 rotates, the guide rail 11 will not rotate with it. The guide rail 11 has a track groove. When the second turntable 7 drives the lifting block 8 to rotate, the guide block 10 is always located in the track groove. The track groove limits the guide block 10 and ensures that the guide block 10 always moves along the track groove. The track groove is provided with an inverted isosceles trapezoidal section, which is used to change the vertical height of the guide block 10 relative to the frame 1, so that the lifting block 8 can go down first and then up. The constant temperature oil tank 12 is arranged below the track groove for immersing the NTC on the second magnetic block 9.

[0050] In this embodiment, a fifth cylinder 15, a sixth cylinder 16, and a wire splitter 17 are also installed on the frame 1. The fifth cylinder 15 is fixed on the frame 1 and located between the first turntable 2 and the second turntable 7. It is connected to the sixth cylinder 16 and is used to control the horizontal movement of the sixth cylinder 16. The wire splitter 17 is connected to the piston rod of the sixth cylinder 16. The sixth cylinder 16 is used to control the vertical movement of the wire splitter 17. The wire splitter 17 is used to perform secondary wire splitting on the NTC pins of the second magnetic block 9. The fifth cylinder 15 can drive the sixth cylinder 16 to perform horizontal displacement as a whole. The sixth cylinder 16 controls the wire splitter 17 to move up and down, so that the wire splitter 17 can be accurately inserted between two pins to complete the secondary wire splitting and ensure that the two pins remain separated.

[0051] The resistance tester 13 and the unloading assembly 14 are arranged sequentially along the rotation path of the second turntable 7. The resistance tester 13 is used to contact the pins of the NTC and perform automatic resistance measurement. During the resistance measurement, the glass head of the NTC is always immersed in the constant temperature oil bath 12. The unloading assembly 14 is used to unload the NTC after testing. The unloading assembly 14 includes a rotary cylinder 141, an electrically controlled permanent magnet plate 142, and an unloading box 143. The rotary cylinder 141 is mounted on the frame 1. The piston rod of the rotary cylinder 141 is connected to the electrically controlled permanent magnet plate 142 and is used to drive the electrically controlled permanent magnet plate 142 to make arc motion. The electrically controlled permanent magnet plate 142 is used to attract the NTC on the second magnetic block 9. The unloading box 143 is located below the electrically controlled permanent magnet plate 142 and is used to receive the NTC after testing. The rotary cylinder 141 can drive the electrically controlled permanent magnet plate 142 to perform arc rotation, which can accurately align the NTC sensor on the second turntable 7 that has completed the resistance test. The electrically controlled permanent magnet plate 142 can stably attract the sensor on the second magnetic block 9. When the rotary cylinder 141 drives the electrically controlled permanent magnet plate 142 to be transferred to the top of the unloading box 143, the magnetic state can be switched by electronic control, so that the sensor can automatically detach and fall into the unloading box 143 below, realizing the automatic unloading and orderly collection of the workpiece after testing.

[0052] A CCD camera 18 is also installed between the resistance tester 13 and the unloading assembly 14. The CCD camera 18 is used to detect the NTC on the second magnetic block 9. The CCD camera 18 performs real-time visual image acquisition and detection on the NTC sensor on the second magnetic block 9 after the resistance test is completed. At the same time, it can work with the back-end unloading assembly 14 to achieve accurate classification and sorting of good and bad products.

[0053] Reference Figure 5In addition, a loading box 19 and a loading assembly 20 are also installed on the frame 1. NTCs are placed inside the loading box 19, and the loading assembly 20 is located near the loading box 19 to transfer a single NTC to the first magnetic block 3. The loading assembly 20 includes a telescopic rod 201, a suction head 202, a tilting cylinder 203, and a transfer plate 204. The telescopic rod 201 is vertically movable on the frame 1. The suction head 202 is fixed to the lower end of the telescopic rod 201 and is connected to an external air pump. The suction head 202 is used to pick up the glass head of the NTC in the loading box 19. The suction port of the suction head 202 is V-shaped and is adapted to the size of the glass head to ensure that the suction head 202 can only pick up a single NTC. The tilting cylinder 203 is located between the first turntable 2 and the telescopic rod 201, and can be horizontally moved on the frame 1. The transfer plate 204 is connected to the piston rod of the tilting cylinder 203 and is used to pick up NTC on the suction head 202.

[0054] The telescopic rod 201 can drive the suction head 202 to move up and down, allowing it to flexibly reach into the feeding box 19 to pick up materials. After the suction head 202 picks up the NTC, the tilting cylinder 203 moves horizontally and approaches the suction head 202 under the control of the linear actuator, and the transfer plate 204 picks up a single NTC on the suction head 202. Then, the tilting cylinder 203 controls the transfer plate 204 to rotate 180°, so that the NTC changes from having the glass head facing up to having the glass head facing down. Finally, the tilting cylinder 203 moves away from the feeding box 19 and approaches the first turntable 2, and the first magnetic block 3 attracts the NTC on the transfer plate 204, completing the feeding and improving the level of production automation.

[0055] The implementation principle of a testing device for single-ended glass sensors according to an embodiment of this application is as follows: This device adopts a dual-rotor circulating structure. First magnetic blocks 3 are spaced apart on the first rotor 2, which fix the NTC single-ended glass sensor by vertical adsorption, eliminating the need for manual clamping and placement of each piece, and enabling continuous automatic feeding and circulation of workpieces. As the first rotor 2 rotates, the combing component 4 cleans and aligns the pins of the NTC sensor, and then the wire separating component 5 precisely separates the two pins, effectively avoiding poor contact problems caused by pin tangling or merging, thus completing the pre-processing for subsequent resistance testing.

[0056] Subsequently, the pusher assembly 6 pushes the workpiece from the first magnetic block 3 to the second magnetic block 9, which has a higher magnetic strength, completing a smooth transfer of the workpiece. The positioning during the transfer process is reliable and it is not easy for the workpiece to fall off. When the second turntable 7 rotates, the guide block 10 slides along the track groove of the guide rail 11. The path change of the inverted isosceles trapezoidal segment of the track groove drives the lifting block 8 to automatically rise and fall, thereby adjusting the vertical position of the second magnetic block 9. This allows the glass head of the NTC sensor to be automatically immersed in the constant temperature oil bath 12, completing the constant temperature environment calibration operation. This avoids the interference of ambient temperature fluctuations on the resistance test results and significantly improves the detection accuracy. The workpiece is then transferred with the turntable to the resistance tester 13 station, realizing automatic pin docking and automated resistance detection.

[0057] Finally, the unloading component 14 completes the automatic unloading of the workpiece. This device can realize the fully automated operation of loading, wire management, transfer, constant temperature pretreatment, resistance testing and unloading, completely replacing the traditional manual contact testing mode and greatly reducing the intensity of manual labor. The device has a high detection rate and strong continuity, which can be adapted to the production rhythm of large-scale automated production lines. At the same time, the standardized operation process can ensure the consistency and reliability of sensor detection results of each batch.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A test device for a single-ended glass sensor, characterized by, The assembly includes a frame (1), a first turntable (2), a first magnetic block (3), a combing assembly (4), a line separating assembly (5), a pushing assembly (6), a second turntable (7), a lifting block (8), a second magnetic block (9), a guide block (10), a guide rail (11), a constant temperature oil tank (12), a resistance tester (13), and a feeding assembly (14). The first turntable (2) is rotatably connected to the frame (1), and the axis of rotation of the first turntable (2) is vertical. The first magnetic block (3) is disposed on the first turntable (2) and is used to vertically attract NTC. The first magnetic blocks (3) are spaced apart along the rotation direction of the first turntable (2). The combing component (4) and the splitting component (5) are arranged sequentially along the rotation direction of the first turntable (2). The combing component (4) is used to brush the pins of the NTC on the first magnetic block (3), and the splitting component (5) is used to separate the two pins after brushing. The second turntable (7) is rotatably connected to the frame (1) and located on one side of the first turntable (2). The lifting block (8) is slidably connected to the second turntable (7) in the vertical direction. The second magnetic block (9) and the guide block (10) are both provided on the lifting block (8). The guide block (10) is located above the second magnetic block (9). The magnetic force of the second magnetic block (9) is greater than that of the first magnetic block (3). The pusher assembly (6) is located at the junction of the first turntable (2) and the second turntable (7) and is used to push the NTC on the first magnetic block (3) toward the second magnetic block (9). The guide rail (11) is fixedly mounted on the outer periphery of the second turntable (7). The guide rail (11) has a track groove. When the second turntable (7) drives the lifting block (8) to rotate, the guide block (10) is always located in the track groove. The track groove is provided with an inverted isosceles trapezoidal section. The inverted isosceles trapezoidal section is used to change the vertical height of the guide block (10) relative to the frame (1). The constant temperature oil tank (12) is located below the track groove and is used for immersing the NTC on the second magnetic block (9). The resistance tester (13) and the unloading assembly (14) are arranged sequentially along the rotation path of the second turntable (7). The resistance tester (13) is used to contact the pins of the NTC and perform automatic resistance measurement. The unloading assembly (14) is used to unload the NTC after testing.

2. A test device for a single ended glass sensor according to claim 1, characterized in that The combing assembly (4) includes a first cylinder (41), a support plate (42), a first translation seat (43), a limiting plate (44), a brush (45), and a second cylinder (46). The first cylinder (41) is mounted on the frame (1). The support plate (42) is connected to the first cylinder (41). The first cylinder (41) is used to control the up and down movement of the support plate (42). The support plate (42) is used to support the glass head of the NTC. The first translation seat (43) is horizontally movably connected to the frame (1). The limiting plate (44) and the second cylinder (46) are both located on the first translation seat (43). The brush (45) is connected to the second cylinder (46) and is used to brush the pin. The second cylinder (46) is used to control the brush (45) to move up and down. The limiting plate (44) has a limiting groove, which is located above the support plate (42) and is used to limit the end of the pin.

3. A test device for a single ended glass sensor according to claim 1, wherein, The wire separating assembly (5) includes a second translation seat (51), a third cylinder (52), a connecting block (53), a slider (54), a roller (55), a spring (56), and a wire separating needle (57). The second translation seat (51) is horizontally movably connected to the frame (1). The third cylinder (52) is located on the second translation seat (51) and connected to the connecting block (53). The third cylinder (52) controls the horizontal movement of the connecting block (53). The slider (54) is slidably connected to the second translation seat (51), and there are two symmetrically arranged. The two ends of the spring (56) are respectively connected to the two sliders (54). The roller (55) is arranged on the slider (54). The two sides of the connecting block (53) are provided with inclined sides, and the two inclined sides abut against the two rollers (55) respectively. The two sliders (54) are provided with the dividing needle (57). When the spring (56) is in the natural state, the two dividing needles (57) overlap vertically. When the connecting block (53) moves close to the first turntable (2), the two sliders (54) move away from each other, and the spring (56) is stretched.

4. A test device for a single ended glass sensor according to claim 1, wherein, The pusher assembly (6) includes a fourth cylinder (61) and a pusher plate (62), the pusher plate (62) being connected to the fourth cylinder (61) for horizontally pushing the NTC.

5. A test device for single ended glass sensors as defined in claim 1, wherein, The unloading assembly (14) includes a rotary cylinder (141), an electrically controlled permanent magnet plate (142), and an unloading box (143). The rotary cylinder (141) is connected to the electrically controlled permanent magnet plate (142) and is used to drive the electrically controlled permanent magnet plate (142) to make arc movements. The electrically controlled permanent magnet plate (142) is used to attract NTC on the second magnetic block (9). The unloading box (143) is located below the electrically controlled permanent magnet plate (142) and is used to receive the NTC after testing.

6. The testing device for a single-ended glass sensor according to claim 1, characterized in that, It also includes a CCD camera (18), which is located between the resistance tester (13) and the feeding assembly (14) for detecting the NTC on the second magnetic block (9).

7. A test device for single ended glass sensors as defined in claim 1, wherein, It also includes a fifth cylinder (15), a sixth cylinder (16), and a splitter rod (17). The fifth cylinder (15) is located between the first turntable (2) and the second turntable (7) and is connected to the sixth cylinder (16) to control the horizontal movement of the sixth cylinder (16). The splitter rod (17) is connected to the sixth cylinder (16) and is used to control the vertical movement of the splitter rod (17). The splitter rod (17) is used to perform secondary splitting of the NTC pins on the second magnetic block (9).

8. A test device for single ended glass sensors according to claim 1, characterized in that It also includes a feeding box (19) and a feeding assembly (20), with the NTC placed inside the feeding box (19) and the feeding assembly (20) close to the feeding box (19) for transferring a single NTC to the first magnetic block (3).

9. A test device for a single ended glass sensor according to claim 8, wherein, The feeding assembly (20) includes a telescopic rod (201), a suction head (202), a tilting cylinder (203), and a transfer plate (204). The telescopic rod (201) is movably mounted on the frame (1). The suction head (202) is mounted on the telescopic rod (201) and is used to adsorb the glass head of NTC in the feeding box (19). The suction port of the suction head (202) is V-shaped and can only adsorb a single NTC. The tilting cylinder (203) is located between the first turntable (2) and the telescopic rod (201) and can move horizontally. The transfer plate (204) is connected to the piston rod of the tilting cylinder (203) and is used to pick up the NTC on the suction head (202).

Images