A power-on testing system and method for a photodetector

Abstract

The photodetector power-on testing system and method provided in this application control the rotation axis to move or flip in a timely manner to lock and release the tray via a funnel locker. The transparent funnel and longitudinal wave vibrator in the funnel locker fix the position and angle of the photodetector under test. A three-jaw pin spreader spreads the pins of each photodetector under test to a suitable angle, and then controls the array-type point contact circuit board to achieve point contact with the pins of the photodetector under test. After the array-type point contact circuit board makes point contact with the pins of the photodetector under test, it sends different electrical signals to the central controller based on whether the photodetector under test receives a normal signal. The central controller then automatically obtains the test results of the photodetector under test. This solution improves the positioning accuracy of the photodetector under test and reduces damage to the pins.

Description

Technical Field

[0001] This application relates to the field of intelligent equipment manufacturing technology, specifically to a photodetector power-on testing system and method. Background Technology

[0002] A photodetector is an electronic component belonging to the InGaAs semiconductor chip family, commonly used for detecting light energy intensity and achieving photoelectric conversion. Before delivery to the customer, the packaged semiconductor chip components must undergo a 48-hour power-on aging process to screen out defective components. During this screening, a three-pin photodetector is inserted into a header pin on the circuit board for online monitoring.

[0003] Currently, in the electronics manufacturing industry, the insertion and removal testing of photodetectors mainly relies on manual labor or semi-automatic equipment, which presents the following technical bottlenecks:

[0004] Insufficient positioning accuracy: Traditional mechanical fixtures rely on rigid positioning, which makes it difficult to compensate for component tolerances (above ±0.2mm), resulting in a contact failure rate >5%;

[0005] Risk of pin damage: Manual use of mechanical flaring tools can easily cause scratches on the pin surface (roughness Ra>0.8μm), affecting high-frequency signal transmission.

[0006] Therefore, there is still room for improvement in existing photoelectric detector insertion and removal detection schemes. Summary of the Invention

[0007] The technical problem to be solved by this application is that the existing technology of power-on testing of photodetectors has low positioning accuracy, easy damage to pins and untimely information feedback. Therefore, this application provides a power-on testing system and method for photodetectors.

[0008] In a first aspect, the technical solution of this application provides a power-on testing system for a photodetector, comprising:

[0009] Central control unit;

[0010] The frame includes vertically arranged guide rails and a cover plate on top of the guide rails;

[0011] A material platform for placing a tray, wherein the photoelectric detectors to be tested are arranged in an array within the tray;

[0012] A funnel locking device includes a funnel fixing plate and transparent funnels arranged in an array on the funnel fixing plate. The array of transparent funnels is the same as that of the photodetector under test, and the height of the transparent funnels is less than the pin length of the photodetector under test. A locking hook is provided on the funnel fixing plate, which is used to lock the tray when in contact with the tray.

[0013] The motion control module includes a rotating shaft, a motor assembly, and a longitudinal wave vibrator. The motor assembly includes a linear motor and a servo motor. The rotating shaft is mounted on a guide rail via the motor assembly. Under the instruction of the central controller, the linear motor controls the rotating shaft to move the funnel locking device along the guide rail. Under the instruction of the central controller, the servo motor controls the rotating shaft to rotate the funnel locking device. The longitudinal wave vibrator is located between the rotating shaft and the funnel locking device and vibrates under the instruction of the central controller.

[0014] The three-claw pin expansion module is configured with multiple three-claw pin expanders in the same array as the photodetector under test. Each of the three-claw pin expanders is used to expand the pins of the photodetector under test to a suitable angle under the instruction of the central controller.

[0015] An array-type point contact circuit board is provided with an array of elastic contacts, the array of elastic contacts being identical in form to the pin array of the photodetector under test; each elastic contact makes point contact with a corresponding pin of the photodetector under test; the array-type point contact circuit board sends an electrical signal to the central controller, the electrical signal being used by the central controller to determine the test result of the photodetector under test.

[0016] Preferably, the photodetector power-on testing system described in some embodiments further includes:

[0017] The monitoring module includes an X-ray imager and an optical sensor mounted on a guide rail. After the transparent funnel is coupled to the photodetector under test, the X-ray imager obtains the imaging information of the funnel locking device, and the optical sensor determines the degree of coupling completion between the transparent funnel and the photodetector under test based on the detected imaging information.

[0018] Preferably, the photodetector power-on testing system described in some embodiments further includes:

[0019] The transparent funnel includes a positioning funnel and an elastic locking part. The opening of the positioning funnel is larger than the maximum diameter of the photodetector under test. The diameter of the elastic locking part is adapted to the maximum diameter of the photodetector under test. The elastic locking part is equipped with a pressure feedback element, which feeds back the pressure value between the photodetector under test and the elastic locking part to the central controller.

[0020] Preferably, in some embodiments of the photodetector power-on testing system, the inner wall of the elastic locking part is formed with an inclined surface, and the diameter of the side closer to the positioning funnel is larger than the diameter of the side farther from the positioning funnel.

[0021] Preferably, in some embodiments of the photodetector power-on testing system, a limiting block is formed on the material platform, and the limiting block is used to limit the position of the tray.

[0022] Preferably, the photodetector power-on testing system described in some embodiments further includes:

[0023] A bracket is disposed on the cover plate, and a first drive motor is disposed inside the bracket;

[0024] The lead screw is mounted on the bracket and moves along the guide rail direction after being driven by the first drive motor.

[0025] The array-type point contact circuit board is disposed at the end of the lead screw and moves along the guide rail direction under the drive of the lead screw.

[0026] Preferably, the photodetector power-on testing system described in some embodiments further includes:

[0027] The second drive motor is disposed inside the bracket;

[0028] The lifting rod, mounted on the bracket, is driven by the second drive motor and moves along the guide rail direction;

[0029] A guide plate is mounted on the lifting rod and moves along the guide rail under the drive of the lifting rod. Guide members are arranged in an array on the guide plate. The array pattern of the guide members is the same as that of the transparent funnel. Each guide member has three guide holes formed inside. Each guide hole corresponds to one pin of a photodetector under test. The top opening size of the guide member is larger than the bottom opening size.

[0030] The sum of the heights of the guide and the transparent funnel is less than the pin length of the photodetector under test.

[0031] Preferably, the photodetector power-on testing system described in some embodiments further includes:

[0032] The barcode scanner, connected to the central controller, scans the batch information of the photodetector under test and sends the scanning result to the central controller.

[0033] Secondly, this application provides a method for testing a photodetector under power, implemented using the photodetector power-on testing system described in any of the first aspects. The method includes the following steps:

[0034] Step 1: After the tray containing the photodetector to be tested is placed on the material platform, the central controller controls the servo motor to drive the rotating shaft to rotate the funnel locking device so that the opening of the transparent funnel faces the photodetector to be tested; wherein, the pins of the photodetector to be tested face the material platform.

[0035] Step 2: The central controller controls the linear motor to drive the rotating shaft, which moves the funnel locking device toward the photodetector under test. The transparent funnel is coupled to the photodetector under test in a one-to-one correspondence, and each photodetector under test is fixed by a transparent funnel. The central controller controls the locking hook to lock the tray.

[0036] Step 3: After the central controller controls the linear motor to drive the rotating shaft to move the funnel locker away from the material platform, it controls the servo motor to drive the rotating shaft to rotate the funnel locker so that the opening of the transparent funnel and the pins of the photodetector under test face the top cover plate.

[0037] Step 4: The central controller starts the longitudinal wave vibrator, which transmits the vibration to the funnel locking device. The photodetector under test in each transparent funnel vibrates accordingly, and eventually each photodetector under test is locked by the transparent funnel.

[0038] Step 5: The central controller controls the servo motor to drive the rotating shaft, which in turn rotates the funnel locking device so that the opening of the transparent funnel faces the material platform. Then, the central controller controls the locking hook to release the tray, and the tray falls onto the material platform under the action of gravity.

[0039] Step Six: The central controller controls the servo motor to drive the rotating shaft to rotate the funnel locking device, so that the opening of the transparent funnel and the pins of the photodetector under test face the top cover plate. Then, the central controller controls each three-claw pin opener to open the corresponding pins of the photodetector under test to a suitable angle.

[0040] Step 7: The central controller controls the linear motor to drive the rotating shaft, which in turn moves the funnel locking device closer to the array-type point contact circuit board until each elastic contact point on the array-type point contact circuit board makes contact with the corresponding pin of the photoelectric detector under test.

[0041] Step 8: The central controller receives the electrical signals fed back from the array-type point contact circuit board and determines the test results of each photodetector under test based on the electrical signals.

[0042] Preferably, in some embodiments of the photodetector power-on testing method, step six further includes:

[0043] The central controller controls the second drive motor to drive the lifting rod and move the guide plate toward the funnel locking device until the three guide holes on each guide are matched with the three pins of a photodetector under test.

[0044] The technical solution provided in this application has the following technical effects compared with the prior art:

[0045] The photodetector power-on testing system and method provided in this application constructs a frame structure with guide rails and a cover plate to provide position adjustment for the pin position and angle correction required before and during testing of the photodetector under test. The transparent funnel and longitudinal wave vibrator in the funnel locker fix the position and angle of the photodetector under test, thereby clamping each photodetector under test onto the funnel locker. During this process, the rotating shaft is moved or flipped as needed to lock and release the funnel locker from the tray. After the tray is released, the photodetector under test is locked by the transparent funnel with its pins facing upwards. A three-jaw pin spreader is used to spread the pins of each photodetector under test to a suitable angle. Then, the array-type point contact circuit board and the pins of the photodetector under test are controlled to make point contact, thereby achieving insertion and removal. After the array-type point contact circuit board makes point contact with the pins of the photodetector under test, it sends different electrical signals to the central controller based on whether the photodetector under test receives a normal signal. The central controller then automatically obtains the test results of the photodetector under test. This proposed solution frees up human resources by using devices such as a transparent funnel and a three-claw pin spreader to calibrate the position and angle of the photodetector under test, as well as the angle of its pins. This ensures that the pins of each photodetector under test accurately contact the elastic contact array on the array-type point contact circuit board. This improves the positioning accuracy of the photodetector under test and reduces damage to the pins. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the power-on testing system for a photodetector according to one embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the structure of a tray placed on a platform according to one embodiment of this application;

[0048] Figure 3 This is a schematic diagram of the structure of the photodetector under test according to one embodiment of this application;

[0049] Figure 4a This is a three-dimensional structural schematic diagram of the transparent funnel described in one embodiment of this application;

[0050] Figure 4b for Figure 4a Side view of the transparent funnel shown;

[0051] Figure 4c for Figure 4a A top view of the transparent funnel shown;

[0052] Figure 5 This is a schematic diagram of the structure of a three-claw pin spreader according to one embodiment of this application;

[0053] Figure 6This is a schematic diagram of the structure of the photodetector under test after its three pins are spread out according to one embodiment of this application;

[0054] Figure 7 This is a schematic diagram of the structure of an array-type point contact circuit board according to an embodiment of this application;

[0055] Figure 8 This is a schematic diagram of the power-on testing system for a photodetector according to another embodiment of this application;

[0056] Figure 9 This is a schematic diagram of the structure of the guide component according to an embodiment of this application;

[0057] Figure 10 This is a flowchart illustrating the steps of a photodetector power-on testing method according to an embodiment of this application. Detailed Implementation

[0058] The specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0059] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0060] This embodiment provides a power-on testing system for a photodetector, including a central controller, and... Figure 1 As shown:

[0061] The frame 100 includes a vertically arranged guide rail 101 and a cover plate 102 on top of the guide rail;

[0062] Material platform 110, such as Figure 2 As shown, a tray 200 is used to place the photodetectors 10 to be tested, which are arranged in an array within the tray 200. The structure of the photodetectors 10 to be tested is as follows: Figure 3 As shown, it includes three pins 11, each approximately 14mm in length. When the detector under test 10 is placed in the tray, the pins face downwards. The tray 200 can be selected to conform to EIA standards.

[0063] Funnel locking device 120 includes a funnel fixing plate and funnels arranged in an array on the funnel fixing plate as shown in the image. Figure 4aThe transparent funnel 121 shown is in the same array configuration as the photodetector 10 under test. The height of the transparent funnel 121 is less than the pin length of the photodetector under test. Therefore, even if the transparent funnel 121 is fitted over the photodetector under test, the pins 11 will remain exposed, without affecting subsequent orientation adjustments to the pins 11. Furthermore, the surface roughness Ra of the inner wall of the transparent funnel 121 is ≤0.1μm. Further, as... Figure 1 As shown, a limiting block 111 is formed on the material platform 110, which is used to limit the position of the tray. The tray 200 needs to be placed in a specified position to ensure that each photodetector under test inside can be locked by the transparent funnel in the funnel locking device. As shown, a locking hook 1210 is provided on the funnel fixing plate. The locking hook 1210 is used to lock the tray 200 when the funnel fixing plate contacts the tray 200. The locking hook 1210 is an elastic silicone rubber layer locking hook. The transparent funnel 121 is set on the funnel fixing plate, and the photodetector under test 10 is placed on the tray. When the funnel fixing plate is locked with the tray, the transparent funnel 121 locks the photodetector under test 10. The structure of the transparent funnel 121 is as follows. Figure 4a and Figure 4b As shown, the transparent funnel 121 includes a positioning funnel 1211 and an elastic locking part 1212. The opening of the positioning funnel 1211 is larger than the maximum diameter of the photodetector 10 under test. The diameter of the elastic locking part 1212 is adapted to the maximum diameter of the photodetector 10 under test, and the elastic locking part 1212 is equipped with a pressure feedback element. The pressure feedback element feeds back the pressure value between the photodetector 10 under test and the elastic locking part 1212 to the central controller. The pressure feedback element can be a piezoresistor with a range of 0-50N and a resolution of 0.01N. As shown in the figure, the elastic locking part 1212 is formed with a slot 1213. The photodetector 10 under test also has a protrusion for indicating electrodes. When the photodetector 10 under test is locked by the elastic locking part 1212, the protrusion on the photodetector 10 under test is embedded in the slot 1213, ensuring that the electrode orientation of the photodetector 10 under test meets the requirements.

[0064] The motion control module includes a rotating shaft 130, a motor assembly 131, and a longitudinal wave vibrator 132. The motor assembly 131 includes a linear motor and a servo motor. The linear motor can be a Hiwin LMG series motor, and the servo motor can be a Yaskawa Σ-7 series. The rotating shaft 130 is mounted on the guide rail 101 via the motor assembly 131. Under the instruction of the central controller, the linear motor controls the rotating shaft 130 to move the funnel locking device 120 along the guide rail 101. Under the instruction of the central controller, the servo motor controls the rotating shaft 130 to rotate the funnel locking device 120. The longitudinal wave vibrator 132 is located between the rotating shaft 130 and the funnel locking device 120 and vibrates under the instruction of the central controller. More preferably, the inner wall of the elastic locking part 1212 is formed with a slope, and the diameter of the side closer to the positioning funnel 1211 is larger than the diameter of the side farther from the positioning funnel 1211. Figure 4c As shown, when the photodetector under test 10 is guided into the elastic locking part 1212 by the positioning funnel 1211, if the protrusion on the photodetector under test 10 does not accurately enter the slot 1213 due to incomplete alignment, the vibration of the longitudinal wave vibrator 132, combined with the inclined surface of the inner wall of the elastic locking part 1212 and the center of gravity deviation of the photodetector under test 10 caused by the presence of the protrusion, changes the angle of the photodetector under test 10, allowing the protrusion to enter the slot 1213 as quickly as possible. The longitudinal wave vibrator 132 has micro-amplitude high-frequency vibration (amplitude adjustable from 0.1-5μm, frequency 20kHz+1%), and its resonance interference is low (modal damping ratio ≥5%).

[0065] The three-claw pin flare module 140 is arranged in multiple arrays in the same array configuration as the photodetector under test. Figure 5 The three-jaw pin spreader 141 shown is used to spread the pins 11 of the photodetector 10 under test to a suitable angle under the instruction of the central controller, such as... Figure 6 As shown. Figure 5The three-claw pin spreader 141 shown includes three claws 1411, each made of thermoplastic elastomer (material: SEBS, hardness Shore A 70±5), with an opening 1412 formed at the end of each claw. When the three-claw pin spreader needs to spread the pin, each claw 1411 can adjust its angle under the control of a central controller, ensuring that a pin is inserted into each opening 1412. In a practical implementation, an image acquisition sensor can be installed on the top of the three-claw pin spreader to detect whether a pin is inserted into each opening 1412. When no pin is inserted into the opening, the positional deviation between the pin and the opening can be fed back to the central controller, which can then adjust the angle of the claws. When a pin is inserted into each opening, the angle of the three claws is adjusted to spread the pin. The angle adjustment of each claw can be achieved by driving a stepper motor (located inside the top, model: Oriental Motor PKP series), with an opening angle of 10°±2° and an opening efficiency ≥200pcs / h. In specific implementation, the three-claw pin flaring module 140 can be driven by a control arm assembly 300, such as a robotic arm. When it needs to perform the opening function, the control arm assembly 300 moves the three-claw pin flaring module 140 to the working position. In specific implementation, after the three-claw pin flaring module 140 is controlled to move above the photodetector under test, the claws of each three-claw pin expander 141 are aligned with the corresponding pins, each pin passes through the opening on the corresponding claw, and the claws of each three-claw pin expander 141 retract to 3mm from the bottom of the pin. The claws are then locked, and the stepper motor drives the claws to expand at a rate of 0.05mm / s to open the pins at an angle of 10°±2°. Each claw is embedded with a PVDF piezoelectric film (model: Measurement Specialties). The DT series monitors the force between the claws and the pins in real time, and synchronously monitors the stress curve using a PVDF sensor (sampling rate 10kHz) to ensure the opening force is ≤2N. The three claws are controlled to open the pins to a suitable angle. Then, the three-claw pin flaring module 140 is pulled upwards. After lifting, each pin disengages from its corresponding claw. The control arm assembly 300 moves the three-claw pin flaring module 140 away without affecting the subsequent movement and contact between the array-type point contact circuit board 150 and the funnel locker 120. The comparison results before and after pin opening are as follows: Figure 6 and Figure 3 As shown.

[0066] Arrayed point contact circuit board 150, such as Figure 7As shown, a flexible contact array is provided on it, the flexible contact array being identical in form to the pin array of the photodetector under test; each flexible contact makes point contact with the corresponding pin of the photodetector under test; the array-type point contact circuit board 150 sends an electrical signal to the central controller, the electrical signal being used by the central controller to determine the test result of the photodetector under test 10. Figure 7 As shown, the array-type point contact circuit board 150 is provided with multiple pin contact plates 151, each pin contact plate 150 having three elastic contacts, corresponding to the three pins of the photodetector under test. Because the three-claw pin expander 141 expands the three pins of the photodetector under test to a suitable angle, this suitable angle corresponds to... Figure 7 The three elastic contacts on the middle pin contact plate 150 have the same angle. Furthermore, the array-type point contact circuit board 150 uses beryllium copper alloy elastic contacts (life > 500,000 cycles, yield strength 1200MPa), with hard gold plating on the contact surface (thickness ≥ 1.5μm, roughness Ra ≤ 0.05μm). The contact force is controllable between 0.3-1.2N (closed-loop control accuracy ±0.05N), and the contact array (contact resistance < 10mΩ, electroplating process parameters: current density 3A / dm², time 20min), combined with an LED-ID positioning system (encoding method: QR Code + infrared positioning), to achieve coordinate-level alarm for defective products. That is, one side of the array-type point contact circuit board 150 has an array of photodetectors under test, and the other side has LEDs. Each LED has an ID, and the ID of the LED corresponds to the coordinates formed by its row and column. Each LED corresponds to the photodetector under test at the same position. If the photodetector under test meets the test conditions after being powered on, the corresponding LED on its other side will light up normally. Finally, based on the ID of the normally lit LED, it can be determined which photodetectors under test have passed the test, and the photodetectors under test in the remaining positions can be considered to have failed the test.

[0067] Preferably, such as Figure 8 As shown, the photodetector power-on testing system further includes:

[0068] The monitoring module 600 includes an X-ray imager and an optical sensor mounted on a guide rail. After the transparent funnel 121 is coupled to the photodetector 10 under test, the X-ray imager obtains imaging information of the funnel locking device. The optical sensor determines the degree of coupling completion between the transparent funnel 121 and the photodetector 10 under test based on the detected imaging information. The X-ray imager emits X-rays into the transparent funnel 121; the imaging results differ depending on whether the photodetector under test is present in the funnel. The coupling status between each transparent funnel and the photodetector under test can be determined based on the imaging results. If all transparent funnels are successfully coupled to the photodetector under test, the locking hook can be controlled to lock the tray. The optical sensor sends the obtained results to the central controller, which determines whether to continue controlling the longitudinal wave vibrator 132 to vibrate based on the coupling status between the transparent funnel and the photodetector under test.

[0069] More preferably, combined with Figure 1 and Figure 8 The system further includes: a bracket 500 disposed on the cover plate 102, with a first drive motor disposed inside the bracket 500; a lead screw 501 disposed on the bracket 500 and driven by the first drive motor to move along the guide rail direction; and an array-type point contact circuit board 150 disposed at the end of the lead screw 501 and moving along the guide rail direction under the drive of the lead screw. When the array-type point contact circuit board 150 needs to approach the funnel locking device carrying the photodetector under test, so that the elastic contacts on the array-type point contact circuit board 150 make point contact with the pins of the photodetector under test, the central controller can control the linear motor to move while simultaneously controlling the first drive motor to move. That is, the lead screw 501 drives the array-type point contact circuit board 150 to move downward, and the linear motor drives the funnel locking device to move upward, thereby accelerating the contact between the two and improving efficiency.

[0070] like Figure 8 As shown, the preferred system further includes a second drive motor, disposed inside the bracket 500; a lifting rod 502, disposed on the bracket 500, driven by the second drive motor and moving along the guide rail direction; a guide plate 503, disposed on the lifting rod 502, moving along the guide rail direction under the drive of the lifting rod 502; the guide plate 503 is arranged in an array... Figure 9The guide member 5031 shown has the same array configuration as the transparent funnel 121. Each guide member 5031 has three guide holes formed inside, and each guide hole corresponds to one pin 11 of the photodetector under test. The top opening size of the guide member 5031 is larger than the bottom opening size. The sum of the heights of the guide member 5031 and the transparent funnel 121 is less than the pin length of the photodetector under test. The function of the guide member 5031 is that if the three-claw pin flaring module does not initially open the pin of the photodetector under test to a suitable position, the three-hole positioning structure inside the guide member 5031 can be used to perform secondary reshaping of the opened pin and correct minor bending deviations.

[0071] More preferably, the above solution also includes a barcode scanner 400, connected to the central controller, which scans the batch information of the photodetector under test and sends the scanning result to the central controller. The barcode scanner 400 can be an RFID reader / writer with a frequency of 13.56MHz. The batch information includes a batch ID and device specifications such as pin spacing and tolerance range. After the scanning result from the barcode scanner 400 is sent to the central controller, the central controller can use it as the object and information to be tested, and the final test result is also associated with it.

[0072] This application also provides a method for testing a photodetector with power applied, such as... Figure 10 As shown, the photodetector power-on test system described in any of the foregoing embodiments is used to implement the method, which includes the following steps:

[0073] Step 1: After the tray containing the photodetector to be tested is placed on the material platform, the central controller controls the servo motor to drive the rotating shaft to rotate the funnel locking device, so that the opening of the transparent funnel faces the photodetector to be tested; wherein, the pins of the photodetector to be tested face the material platform.

[0074] In the initial state, the pins of the photodetector under test are facing downwards.

[0075] Step 2: The central controller controls the linear motor to drive the rotating shaft, which moves the funnel locking device toward the photodetector under test. The transparent funnel is coupled to the photodetector under test in a one-to-one correspondence, and each photodetector under test is fixed by a transparent funnel. The central controller controls the locking hook to lock the tray.

[0076] At this point, each transparent funnel contains a photodetector to be tested, with the pins of the photodetector pointing downwards.

[0077] Step 3: After the central controller controls the linear motor to drive the rotating shaft to move the funnel lock away from the material platform, it controls the servo motor to drive the rotating shaft to rotate the funnel lock so that the opening of the transparent funnel and the pin of the photodetector under test face the top cover plate.

[0078] By controlling the funnel locking device to rotate 180°, the pins of the photodetector under test can be made to face upwards.

[0079] Step 4: The central controller starts the longitudinal wave vibrator, which transmits the vibration to the funnel locking device. The photodetector under test in each transparent funnel vibrates accordingly, and eventually each photodetector under test is locked by the transparent funnel.

[0080] The vibration of the longitudinal wave vibrator ensures that the position and angle of each photodetector under test meet the requirements. The protruding edge of the photodetector under test is locked within the slot of the transparent hole. At this time, the pins of the photodetector under test face upwards.

[0081] Step 5: The central controller controls the servo motor to drive the rotating shaft, which in turn rotates the funnel locking device so that the opening of the transparent funnel faces the material platform. Then, the central controller controls the locking hook to release the tray, and the tray falls onto the material platform under the action of gravity.

[0082] By controlling the funnel locking device to rotate 180°, the tray is located below the funnel locking device, the locking hook is released, and the tray falls off under the action of gravity. At this time, the pins of each photodetector under test are exposed. In this step, the pins of each photodetector under test are facing downwards.

[0083] Step Six: The central controller controls the servo motor to drive the rotating shaft, which in turn rotates the funnel locking device so that the opening of the transparent funnel and the pins of the photodetector under test face the top cover. Then, the central controller controls each three-claw pin opener to open the corresponding pins of the photodetector under test to a suitable angle.

[0084] The funnel locking device rotates 180°, with the pins of each photodetector under test facing upwards. At this time, the three-jaw pin spreader is moved above the funnel locking device to spread the pins of each photodetector under test one by one. Then the three-jaw pin spreader is moved away.

[0085] Step 7: The central controller controls the linear motor to drive the rotating shaft, which in turn moves the funnel locking device closer to the array-type point contact circuit board until each elastic contact point on the array-type point contact circuit board makes contact with the corresponding pin of the photoelectric detector under test.

[0086] At this time, the pins of the photodetector are pointing upwards and stretched to a suitable angle, matching the positional relationship with each elastic contact on the array-type point contact circuit board. Directly controlling the movement of the funnel locker along the guide rail direction can achieve point contact between the two, which is equivalent to performing pin insertion.

[0087] Step 8: The central controller receives the electrical signals fed back from the array-type point contact circuit board and determines the test results of each photodetector under test based on the electrical signals.

[0088] This electrical signal is the signal output by the circuit board after both pins of each photodetector under test have successfully made contact with the corresponding elastic contact. It can be a level signal indicating whether the photodetector under test has passed the test; for example, a high level corresponds to passing the test, and a low level to failing. Since the different elastic contacts are arranged in the same array as the pins of the photodetector under test, the positions of the photodetectors under test corresponding to the elastic contacts at different locations are known. More preferably, the success of the test can be indicated by the illumination of LEDs arranged on another surface with the same array as the photodetector under test. Since the focus of this application is on how to achieve the positioning and pin adjustment of the photodetector under test, the method of feedback of test results from the array-type point contact circuit board is not the focus and can be implemented using existing methods, which will not be elaborated here.

[0089] More preferably, step six further includes: the central controller controlling the second drive motor to drive the lifting rod to move the guide plate toward the funnel locking device until the three guide holes on each guide member correspond and match the three pins of a photodetector under test. That is, this solution can perform secondary shaping and positioning of the pins, improving the success rate of point contact between the pins and the elastic contacts.

[0090] In some solutions, in step seven, the first drive motor and the linear motor can be controlled to run simultaneously. The lead screw drives the array-type point contact circuit board to move downward, and the linear motor drives the funnel locker to move upward, which speeds up the contact process between the two and improves efficiency.

[0091] In addition, when the array-type point contact circuit board and the funnel locker need to be separated after the specified power-on time is completed, the central controller can simultaneously control the first drive motor and the linear motor to drive the lead screw and the rotary shaft in the opposite direction.

[0092] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0093] The above are merely the principles and preferred embodiments of this application. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this application, and these modifications should also be considered within the scope of protection of this application.

Claims

1. A photoelectric detector power-up test system, comprising: Comprise: A central controller; A frame comprising vertically arranged guide rails and a cover plate on top of the guide rails; A material platform for placing a tray, the tray having a plurality of photodetectors to be tested arranged in an array; A funnel locker comprising a funnel fixing plate and a plurality of transparent funnels arranged in an array on the funnel fixing plate, the transparent funnels having the same array form as the photodetectors to be tested, and the height of the transparent funnels being less than the length of the pins of the photodetectors to be tested; the funnel fixing plate is provided with locking hooks for locking the tray when in contact with the tray; A motion control module comprising a rotating shaft, a motor assembly and a longitudinal wave vibrator, the motor assembly comprising a linear motor and a servo motor; the rotating shaft is arranged on the guide rail through the motor assembly; the linear motor controls the rotating shaft to drive the funnel locker to move along the guide rail under the instruction of the central controller, and the servo motor controls the rotating shaft to drive the funnel locker to rotate under the instruction of the central controller; the longitudinal wave vibrator is arranged between the rotating shaft and the funnel locker and vibrates under the instruction of the central controller; A three-claw pin flaring module, a plurality of three-claw pin expanders are arranged in the same array form as the photodetectors to be tested, each of the three-claw pin expanders is used to expand the pins of the photodetectors to be tested to a suitable angle under the instruction of the central controller; An array type point contact circuit board is provided with an elastic contact array, the elastic contact array has the same array form as the pins of the photodetectors to be tested; each elastic contact is in point contact with the corresponding pin of the photodetector to be tested; the array type point contact circuit board sends an electrical signal to the central controller, and the electrical signal is used by the central controller to determine the test result of the photodetector to be tested.

2. The photodetector power-on test system of claim 1, wherein, Further comprising: A monitoring module comprising an X-ray imager and an optical sensor arranged on the guide rail; After the transparent funnel is coupled with the photodetector to be tested, the X-ray imager obtains imaging information of the funnel locker, and the optical sensor determines the coupling completion degree of the coupling of the transparent funnel with the photodetector to be tested according to the detected imaging information.

3. The photodetector power-on test system of claim 2, wherein, Further comprising: The transparent funnel comprises a positioning funnel and an elastic locking part, the opening of the positioning funnel is greater than the maximum diameter of the photodetector to be tested, the diameter of the elastic locking part is matched with the maximum diameter of the photodetector to be tested, and the elastic locking part is provided with a pressure feedback element, the pressure feedback element feeds back the pressure value between the photodetector to be tested and the elastic locking part to the central controller.

4. The photodetector power-on test system according to claim 3, wherein: The inner wall of the elastic locking part is formed with a slope, and the diameter of the side close to the positioning funnel is greater than the diameter of the side away from the positioning funnel.

5. The photodetector power-on test system according to claim 1, wherein: A limiting block is formed on the material platform, and the limiting block is used to limit the tray.

6. The photodetector power-on testing system of claim 1, wherein, Further comprising: A support is arranged on the cover plate, and a first driving motor is arranged in the support; A screw rod is arranged on the bracket and moves along the guide rail direction after being driven by the first driving motor. The arrayed point contact circuit board is arranged at the end of the screw rod and moves along the guide rail direction after being driven by the screw rod.

7. The photodetector power-on test system of claim 6, wherein, Further comprising: A second driving motor is arranged inside the bracket. A lifting rod is arranged on the bracket and moves along the guide rail direction after being driven by the second driving motor. A guide plate is arranged on the lifting rod and moves along the guide rail direction after being driven by the lifting rod. The guide plate is arranged in an array form and has guide pieces.

8. The photodetector power-on test system of any of claims 1-7, wherein, Each guide piece has three guide holes. The height of the guide piece and the transparent funnel is less than the length of the pin of the photoelectric detector.

9. A method of power-on testing a photodetector, the method comprising: Further comprising: A code scanner is connected to the central controller and scans the batch information of the photoelectric detector and sends the scanning result to the central controller. The photoelectric detector power-on test system is implemented by using any one of claims 1-8. Step one: after the tray with the photoelectric detector is placed on the material platform, the central controller controls the servo motor to drive the rotating shaft to rotate the funnel lock to make the opening of the transparent funnel face the photoelectric detector. Step two: the central controller controls the linear motor to drive the rotating shaft to move the funnel lock to the photoelectric detector, and the transparent funnel is coupled with the photoelectric detector one by one. Step three: after the central controller controls the linear motor to drive the rotating shaft to move the funnel lock away from the material platform, it controls the servo motor to drive the rotating shaft to rotate the funnel lock to make the opening of the transparent funnel and the pin of the photoelectric detector face the top cover. Step four: the central controller controls the longitudinal wave vibrator to start, and the longitudinal wave vibrator transmits vibration to the funnel lock. Step five: after the central controller controls the servo motor to drive the rotating shaft to rotate the funnel lock to make the opening of the transparent funnel face the material platform, it controls the locking hook to release the tray. Step six: after the central controller controls the servo motor to drive the rotating shaft to rotate the funnel lock to make the opening of the transparent funnel and the pin of the photoelectric detector face the top cover, it controls the three-jaw pin expander to expand the pin of the photoelectric detector to a suitable angle. Step seven: the central controller controls the linear motor to drive the rotating shaft to move the funnel lock to the arrayed point contact circuit board until each elastic contact on the arrayed point contact circuit board contacts the pin of the photoelectric detector. Step eight: the central controller receives the electric signal feedback from the arrayed point contact circuit board, and determines the test result of each to-be-tested photodetector according to the electric signal.

10. The photodetector power-on test method of claim 9, wherein, The step six further comprises: The central controller controls the second driving motor to drive the lifting rod to move the guide plate towards the funnel locker until the three guide holes on each guide piece are matched with the three pins of a to-be-tested photodetector.

Images