Test bench for automatically interleaving execution of optical module tests

Abstract

A test bench for automatically interleaving execution of optical module tests, comprising a machine base (100), an end-face inspector (40), testers (50), optical fiber plugging and unplugging stations (60), and a robotic arm (30). The machine base has loading areas (10) and unloading areas (70). The end-face inspector, the testers, the optical fiber plugging and unplugging stations, and the robotic arm are disposed on the machine base. The robotic arm comprises a first pick-up member and a second pick-up member. The first pick-up member and the second pick-up member are used for picking up optical modules. The robotic arm is used for transferring optical modules among the loading areas, the end-face inspector, the optical fiber plugging and unplugging stations, the testers, and the unloading areas, and is adapted to pick up, on the basis of the first pick-up member and the second pick-up member, optical modules at different test progress levels at a same time, so as to interleave execution of test procedures for at least two optical modules.

Description

Test bench for automated interleaving of optical module tests Technical Field

[0001] This invention relates to the field of optical module testing, and in particular to a test bench for automatically performing interleaved optical module tests. Background Technology

[0002] An optical module is an optoelectronic device that performs photoelectric and electro-optical conversion. The transmitting end of the optical module converts electrical signals into optical signals, which are then transmitted through the fiber optic connector. The receiving end then converts the optical signals back into electrical signals. The optical module is a core component of an optical communication network, and its performance directly determines the speed and stability of the optical communication link. To ensure that the optical modules leaving the factory meet the corresponding performance standards, they must undergo a series of rigorous tests before leaving the factory.

[0003] The existing optical module testing method mainly involves manually inserting test modules into the optical module to perform performance testing. In other words, the test operator manually operates the test instrument to complete the testing process of a single optical module step by step.

[0004] In this testing method, the optical module and test module are manually plugged in and out. The force applied is difficult to control precisely, and the accuracy of manual plugging and unplugging is affected by the worker's subjective skill. Without precise control of the force and accuracy, damage to the optical module or test module is easily caused, resulting in significant human error. Furthermore, the subjective influence of the test operators' methods leads to variations in operating habits and experience, resulting in non-standardized testing procedures and inconsistent test results, thus compromising product quality. The repetitive testing steps for optical modules can cause operator fatigue, increasing the risk of errors. Moreover, due to the numerous testing items for optical modules, and the relative independence between different test items and instruments, a single operator can only operate or observe one instrument and perform one testing step at a time. This results in low testing efficiency, failing to meet the demands of mass production. Existing optical module manufacturers have to invest heavily in manpower to increase testing capacity, leading to high labor costs. Summary of the Invention

[0005] One objective of this invention is to provide a test bench for automatically performing interleaved optical module tests. This test bench can automatically execute the testing process of optical modules, avoid errors caused by manual operation, and help ensure the standardization of testing operations and the reliability of batch test results.

[0006] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests, wherein the test bench for automatically performing interleaved optical module tests automates the optical module testing process, which helps to reduce labor costs.

[0007] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests, wherein the test bench for automatically performing interleaved optical module tests can improve the testing efficiency of optical modules and is suitable for batch testing of optical modules.

[0008] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests, wherein the test bench for automatically performing interleaved optical module tests can simultaneously execute the test process of at least two optical modules and has a high throughput.

[0009] Another objective of this invention is to provide a test bench for automatically interleaving optical module testing, wherein the test bench for automatically interleaving optical module testing executes the testing process of at least two optical modules in an interleaved manner, thereby enabling the testing of at least two optical modules at the same time, which is beneficial to improving testing efficiency and shortening the overall testing time of multiple optical modules.

[0010] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests, wherein the test bench for automatically performing interleaved optical module tests improves testing efficiency while reducing labor costs and human error, and has significant commercial value.

[0011] Another objective of this invention is to provide a test bench for automatically interleaving optical module testing. In the process of testing optical modules, the test bench can start the testing process of the next optical module without waiting for the testing process of the previous optical module to end. At least two optical modules can be tested in parallel at the same time, thereby improving testing efficiency.

[0012] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module testing. The test bench for automatically performing interleaved optical module testing is based on the interleaved testing of optical modules, which can effectively reduce the idle time of the test equipment on the test bench and improve the utilization rate of resources.

[0013] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests, wherein the test equipment on the test bench can take turns testing multiple optical modules, thereby improving the efficiency of batch testing while avoiding resource conflicts.

[0014] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module testing, wherein the test bench includes a robotic arm, wherein the robotic arm is capable of picking up at least two optical modules at the same time to improve the transfer efficiency of optical modules, thereby enabling the test bench to perform testing processes on at least two optical modules in an interleaved manner.

[0015] Another objective of this invention is to provide a test bench for automated interleaved optical module testing, wherein the robotic arm includes a robotic arm and a robotic hand disposed at the end of the robotic arm, wherein the robotic hand includes a first pickup and a second pickup, wherein the first pickup and the second pickup are used to pick up optical modules, and wherein the robotic hand can pick up two optical modules at different testing stages at the same time, so as to improve the transfer efficiency of the robotic arm for optical modules.

[0016] Another objective of this invention is to provide a test bench for automated interleaving optical module testing, wherein the test bench has a loading area, wherein the loading area includes at least two trays, wherein the trays are used to place optical modules, and wherein the test bench places optical modules on different trays based on different test results, so as to facilitate subsequent rapid identification and processing of optical modules with different test results, improve work efficiency, and facilitate subsequent analysis of optical modules with unqualified test results, thereby providing feedback to production and taking targeted improvement measures, which is conducive to improving the product quality of optical modules.

[0017] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module testing, wherein the test bench can automatically transfer unqualified optical modules to the tray in the unloading area during the testing process, and pick up the next optical module for testing, thereby enabling continuous optical module testing without human intervention.

[0018] Another objective of this invention is to provide a test bench for automated interleaved optical module testing, wherein the unloading area includes an end-inspection NG tray, a test NG tray, and a finished product tray. The end-inspection NG tray is used to place optical modules that fail the end-inspection test, the test NG tray is used to place optical modules that fail the test of the tester, and the finished product tray is used to place optical modules that pass the test. This facilitates the categorized placement of optical modules, enabling targeted analysis of optical modules that fail different test items, and allowing for targeted measures to improve the yield and product quality of optical modules.

[0019] Another objective of this invention is to provide a test bench for automatically inserting and performing optical module tests, wherein the test bench includes an optical fiber head cleaning section, wherein the optical fiber head cleaning section is used to clean the optical fiber head before inserting it into the optical module, so as to remove dust, impurities and other contaminants that may be present in the optical fiber head, and avoid contaminants affecting the test results and damaging the optical module.

[0020] Another objective of this invention is to provide a test bench for automatically performing interleaved optical module tests. This test bench can complete the entire testing process of the optical module and improves testing efficiency based on the interleaved testing process. It can significantly increase testing speed without increasing the number of workbenches, thereby reducing the cost of improving testing efficiency and has significant commercial value.

[0021] Another objective of this invention is to provide a test bench for automated interleaving optical module testing, wherein the loading area, the barcode scanning station, the end-point inspection instrument, the tester, the fiber optic insertion / removal station, and the unloading area are arranged around the robotic arm to facilitate the transfer of optical modules by the robotic arm, thereby improving testing efficiency and making the test bench structure compact. At the same time, the stations can be added or improved according to actual needs, so as to flexibly adjust the stations according to testing requirements.

[0022] According to one aspect of the present invention, the present invention improves a test bench for automatically performing interleaved optical module testing, wherein the test bench for automatically performing interleaved optical module testing comprises:

[0023] A machine tool, wherein the machine tool is provided with a loading area and a unloading area;

[0024] An end-face inspection device, wherein the end-face inspection device is installed on the machine and is used to perform end-face inspection on the optical module;

[0025] Fiber optic insertion and removal station, wherein the fiber optic insertion and removal station is set on the machine and is used to insert fiber optic heads into optical modules and remove fiber optic heads from optical modules.

[0026] Test instrument, wherein the test instrument is disposed on the machine tool and is used to test the optical module; and

[0027] A robotic arm, wherein the robotic arm is disposed on the machine base and includes a first pickup and a second pickup, wherein the first pickup and the second pickup are used to pick up an optical module, wherein the robotic arm transfers the optical module between the loading area, the end-of-line inspection instrument, the fiber optic insertion / removal station, the testing instrument, and the unloading area based on the following steps:

[0028] A. The robotic arm picks up the first optical module;

[0029] B. The robotic arm places the first optical module on the end-face inspection device, and the end-face inspection device performs end-face inspection on the first optical module.

[0030] C. The robotic arm pulls out the second optical module that has completed the test from the tester and places the second optical module in the fiber optic plugging station, and picks up the second optical module after the fiber optic head on the second optical module is pulled out.

[0031] D. The robotic arm places the first optical module at the fiber optic insertion / removal station, and inserts the first optical module into the tester after the fiber optic head is inserted into the first optical module.

[0032] E. The robotic arm places the second optical module in the unloading area and returns to step A.

[0033] In one embodiment, the robotic arm includes a robotic arm and a robotic hand disposed at one end of the robotic arm, wherein the other end of the robotic arm is mounted on the machine base, wherein the robotic hand includes a base and a visual positioning sensor, wherein the first pickup, the second pickup, and the visual positioning sensor are mounted on different sides of the base.

[0034] In one embodiment, the first pickup and the second pickup are of the same type.

[0035] In one embodiment, the first pickup includes a first lifting device and a first gripper, wherein the first lifting device is mounted on the base, and the first gripper is mounted on the first lifting device and adapted to be driven by the first lifting device to move up and down relative to the base, wherein the first gripper includes two opposing first gripping fingers. The second pickup includes a second lifting device and a second gripper, wherein the second lifting device is mounted on the base, and the second gripper is mounted on the second lifting device and adapted to be driven by the second lifting device to move up and down relative to the base, wherein the second gripper includes two opposing plate-shaped gripping fingers, wherein the opening and closing range of the two plate-shaped gripping fingers is smaller than the opening and closing range of the two first gripping fingers.

[0036] In one embodiment, the robotic arm further includes a negative pressure adsorption fixture, wherein the negative pressure adsorption fixture includes a third lifting device and a pair of suction cups, wherein the third lifting device is mounted on the base, and the suction cups are mounted on the third lifting device and adapted to be driven by the third lifting device to move up and down relative to the base.

[0037] In one embodiment, the first pickup includes a first lifting device and a first gripper, wherein the first lifting device is mounted on the base, the first gripper is mounted on the first lifting device and adapted to be driven by the first lifting device to move up and down relative to the base, wherein the first gripper includes two opposing first gripping fingers, and the second pickup includes a third lifting device and a pair of suction cups, wherein the third lifting device is mounted on the base, the suction cups are mounted on the third lifting device and adapted to be driven by the third lifting device to move up and down relative to the base.

[0038] In one embodiment, the robotic arm includes a six-dimensional force sensor, which is disposed between the base and the robotic arm.

[0039] In one embodiment, the robotic arm includes an adsorption device disposed at the bottom of the base, the adsorption device being used to adsorb a corresponding tray.

[0040] In one embodiment, the loading area is provided with at least one raw material tray for placing optical modules awaiting testing, the unloading area includes a raw material tray and at least one NG tray, the raw material tray is used to place optical modules that have passed testing, and the NG tray is used to place optical modules that have failed testing by the end-of-life inspection instrument and / or the testing instrument, wherein the robotic arm places the optical modules in the raw material tray or the NG tray based on the test results of the optical modules.

[0041] In one embodiment, the unloading area includes an end-inspection NG tray and a test NG tray, wherein the end-inspection NG tray is used to place optical modules that fail the end-inspection test, and the test NG tray is used to place optical modules that fail the test of the tester. The robotic arm is configured to place the optical module in the end-inspection NG tray if the end-inspection test result of the end-inspection instrument is unqualified, and to place the optical module in the end-inspection NG tray if the test result of the tester is unqualified.

[0042] In one embodiment, the unloading area further includes a spare tray, which is used to be activated as such a tray when one of the end-inspection NG tray, the test NG tray, and the clinker tray is filled with optical modules.

[0043] In one embodiment, the tester includes at least one test port and at least one preheating port, wherein the preheating port is used to change the temperature of the optical module, and the test port is used to test the optical module.

[0044] In one embodiment, the test bench for automated interleaving optical module testing includes a barcode scanning station, which is set on the machine and used to identify the optical module. The robotic arm moves the optical module to the barcode scanning station for identification before the optical module is placed on the end-point tester.

[0045] In one embodiment, the fiber optic insertion / removal station includes an optical module mounting base, a cleaning section, and a fiber optic insertion / removal socket. The optical module mounting base, the cleaning section, and the fiber optic insertion / removal socket are arranged longitudinally, with the longitudinal direction serving as the insertion / removal direction for the fiber optic head. The optical module mounting base and the cleaning section are vertically and flexibly mounted on the machine. The robotic arm places the optical module in the fiber optic insertion / removal station with the optical module mounted on the optical module mounting base. Before the fiber optic head is inserted into the optical module, the cleaning section rises between the optical module mounting base and the fiber optic insertion / removal socket. The fiber optic insertion / removal socket moves the fiber optic head toward the cleaning section so that the fiber optic head contacts the cleaning section and is cleaned. After cleaning, the fiber optic insertion / removal socket moves away from the cleaning section, and the cleaning section descends.

[0046] In one embodiment, the optical module mounting base includes a lifting device, a lifting seat, and a clamping seat. The lifting device is mounted on the machine tool, the lifting seat is mounted on the lifting device and is adapted to be raised or lowered by the lifting device, and the clamping seat is disposed on the lifting seat and includes two opposing limiting walls. The robotic arm places the optical module in the fiber optic insertion / removal station with the optical module positioned between the two limiting walls. The distance between the two limiting walls is adjustable for clamping the optical module.

[0047] In one embodiment, the optical module mounting base includes a pressing part, wherein the pressing part includes a rotary lifting base and a pressing rod, wherein the bottom of the rotary lifting base is mounted on the lifting base, the top of the rotary lifting base has an upwardly extending rotary telescopic rod, and wherein the pressing rod is connected to the rotary telescopic rod and has an extension direction perpendicular to the axial direction of the rotary telescopic rod.

[0048] In one embodiment, the pressing rod is L-shaped and one end of it is connected to the rotary telescopic rod, and the other end of the pressing rod is fitted with a pressing block.

[0049] In one embodiment, the fiber optic plug-in includes a longitudinal moving base, a transverse moving base, a transverse clamping device, and a lifting unlocking device. The transverse moving base is mounted on the longitudinal moving base and moves along the longitudinal direction following the longitudinal moving base. The transverse clamping device is mounted on the transverse moving base and includes two clamping arms opposite each other in the transverse direction. The distance between the two clamping arms is adjustable to accommodate the fiber optic tip. The lifting unlocking device is jackingly mounted on the transverse moving base and is used to press down the fiber optic tip clamped between the two clamping arms so that the fiber optic tip can be inserted into the optical module.

[0050] In one embodiment, the loading area, the barcode scanning station, the end-of-line inspection device, the tester, the fiber optic plugging / unplugging station, and the unloading area are arranged around the robotic arm.

[0051] In one embodiment, the number of the tester and the insertion / removal station is two, with the two insertion / removal stations located on both sides of the robotic arm, and the two testers corresponding to the two insertion / removal stations respectively.

[0052] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0053] Figure 1 is a schematic diagram of the structure of a test bench for automatically performing interleaved optical module testing according to an embodiment of the present invention.

[0054] Figure 2 is a top view of the test bench for automatically interleaving optical module testing according to the above embodiment of the present invention.

[0055] Figure 3 is a schematic diagram of the structure of the robotic arm of the test bench for automatically performing optical module testing according to the above embodiment of the present invention.

[0056] Figure 4 is a schematic diagram of the structure of the robotic arm according to the above embodiment of the present invention.

[0057] Figure 5 is a structural schematic diagram of the robotic hand of the robotic arm according to the above embodiment of the present invention from another perspective.

[0058] Figure 6 is a schematic diagram of the fiber optic insertion / removal station of the test bench for the automated insertion and removal of optical modules according to the above embodiment of the present invention.

[0059] Figure 7 is a partial structural schematic diagram of the fiber optic insertion / removal station according to the above embodiment of the present invention.

[0060] Figure 8 is a partial structural schematic diagram of the fiber optic insertion / removal station according to the above embodiment of the present invention.

[0061] Figure 9 is a partial structural schematic diagram of the fiber optic plug and unplug station according to the above embodiment of the present invention.

[0062] Figure 10 is a schematic diagram of the fiber head support of the fiber insertion / removal station according to the above embodiment of the present invention.

[0063] Figure 11 is a schematic diagram of the workflow of the test bench for automatically interleaving optical module testing according to the above embodiment of the present invention.

[0064] Figure 12 is a schematic diagram of the test progress of the optical module by the test bench for automatically interleaving optical module testing according to the above embodiment of the present invention within a time period. Detailed Implementation

[0065] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0066] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0067] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0068] Referring to Figures 1 to 10 of the accompanying drawings of this invention, an automated interleaved optical module testing bench according to an embodiment of the present invention is illustrated. This automated interleaved optical module testing bench can interleavedly execute the testing process of at least two optical modules within a time period, effectively improving the testing throughput of the automated interleaved optical module testing bench, thereby increasing the testing efficiency of optical modules. Furthermore, the automated interleaved optical module testing bench can automatically perform the testing of optical modules, effectively reducing the error risk and labor costs associated with manual operation.

[0069] Specifically, the automated test bench for performing optical module testing includes a machine 100, a robotic arm 30, an end-face inspection device 40, a tester 50, and a fiber optic insertion / removal station 60. The machine 100 has a loading area 10 and an unloading area 70. The end-face inspection device 40 is located on the machine 100 and is used to perform end-face inspection on the optical modules. The tester is located on the machine 100 and is used to test the optical modules. The fiber optic insertion / removal station 60 is located on the machine 100 and is used to insert optical fibers... The machine tool inserts an optical module and removes an optical fiber from the optical module. The robotic arm 30 is set on the machine tool 100 and includes a first pickup and a second pickup. The first pickup and the second pickup are used to pick up optical modules. The robotic arm 30 is used to transfer optical modules between the loading area 10, the end-of-line inspection instrument 40, the optical fiber insertion and removal station 60, the tester 50, and the unloading area 70. It is also adapted to pick up optical modules with different testing progress at the same time based on the first pickup and the second pickup.

[0070] It is worth mentioning that the robotic arm 30, based on the cooperation of the first and second picking components, picks up optical modules at different testing stages simultaneously, so as to be suitable for performing the testing process of at least two optical modules intermittently during testing. Specifically, referring to Figure 11, the robotic arm 30 transfers the optical modules between the loading area 10, the end-of-line inspection device 40, the fiber optic insertion and extraction station 60, the testing device 50, and the unloading area 70 based on the following steps:

[0071] A. The robotic arm 30 picks up a first optical module;

[0072] B. The robotic arm 30 places the first optical module on the end-face inspection device 40, and the end-face inspection device 40 performs end-face inspection on the first optical module.

[0073] C. The robotic arm 30 pulls out a second optical module that has completed the test from the tester 50 and places the second optical module in the fiber optic insertion and removal station 60, and picks up the second optical module after the fiber optic head on the second optical module is pulled out.

[0074] D. The robotic arm 30 places the first optical module in the fiber optic insertion station 60, and inserts the first optical module into the tester 50 after the fiber optic head is inserted into the first optical module.

[0075] E. The robotic arm 30 places the second optical module in the unloading area 70 and returns to step A.

[0076] Referring to Figure 12, the testing progress of the automated interleaved optical module testing platform within a time period is illustrated. At time t1, the robotic arm 30 picks up the first optical module A, and the first optical module A begins to enter the testing phase. At this time, the second optical module AN, which entered the testing phase before the first optical module A, is still in the testing phase and has not yet finished testing. During the time when the second optical module AN is still in the testing phase, the automated interleaved optical module testing platform executes the testing process of the first optical module A, thereby achieving the time overlap of the testing processes of the first optical module A and the second optical module AN. In this way, the testing of the third optical module A+1 is started while the first optical module A is still in the testing phase, and the optical module testing is performed interleaved to shorten the overall testing time.

[0077] It is understood that, in the above description and Figure 12, the second optical module AN represents the first N optical modules that start testing before the first optical module A, where N is a positive integer, and the third optical module A+1 represents the first optical module that starts testing after the first optical module A. It is also understood that, in the description of this invention, the first optical module A, the second optical module AN, and the third optical module A+1 are only used for ease of understanding that the optical modules enter testing at different times, and do not constitute a limitation on the type of optical modules. The first optical module A, the second optical module AN, and the third optical module A+1 can be different types / models of optical modules, or they can be the same type of optical module; this invention does not impose any limitations on this.

[0078] In other words, during the time period from t1 to t2, the test bench for the automated interleaved optical module test interleaved the test processes of at least two optical modules. That is, the start of the test process of the next optical module (such as the third optical module N+1) does not need to wait for the end of the test process of the previous optical module (such as the first optical module N). At least two optical modules can be tested in parallel at the same time, which helps to improve test efficiency.

[0079] Specifically, referring to Figure 12, during the time period from t1 to t2, the automated interleaved optical module testing test bench can simultaneously perform tests on at least two optical modules, and one test station can simultaneously execute the testing process for at least two optical modules, effectively improving the testing throughput of the automated interleaved optical module testing test bench. Furthermore, one robotic arm 30 can simultaneously handle the testing processes of multiple optical modules, improving testing efficiency while avoiding a significant increase in equipment costs, and also helping to improve the utilization rate of the testing equipment and reduce equipment idle time.

[0080] Referring to Figures 3 to 5, the robotic arm 30 includes a robotic arm 31 and a robotic hand 32 disposed at one end of the robotic arm 31. The other end of the robotic arm 31 is mounted on the machine base 100. The robotic hand 32 includes a base 321 and a visual positioning sensor 322. The first pickup, the second pickup, and the visual positioning sensor 322 are mounted on different sides of the base 321.

[0081] Specifically, the visual positioning sensor 322 performs positioning using image recognition, such as determining the relative position of the optical module and the robotic arm 32, the size and angle of the optical module, and the positions of the end-of-line inspection device 40, the testing device 50, the fiber optic insertion / removal station 60, and the unloading area 70. This information provides a basis for the robotic arm 32 to accurately grasp and move the optical module. Specifically, the visual positioning sensor 322 includes a CCD camera 3221 and a ring light source 3222. The ring light source 3222 is positioned below the CCD camera 3221 and has a through-hole at its center. The CCD camera 3221 is positioned with its lens facing the through-hole of the ring light source 3222. The CCD camera 3221 has high resolution and high sensitivity, enabling accurate positioning. The ring light source 3222 effectively avoids shadows and reflections caused by uneven lighting, ensuring the clarity and contrast of the images captured by the CCD camera 3221, further guaranteeing positioning accuracy.

[0082] It is worth mentioning that, in this embodiment of the present invention, the first pickup and the second pickup can be of the same type or different types. For example, the first pickup is a clamping fixture and the second pickup is a negative pressure adsorption fixture.

[0083] Specifically, in this embodiment of the present invention, the robotic arm 31 may be provided with at least two of the following: a first clamping fixture 323, a second clamping fixture 323A, and a negative pressure adsorption fixture 324. The first clamping fixture 323 includes a first lifting device 3231 and a first gripper 3232. The first lifting device 3231 is mounted on the base 311, and the first gripper 3232 is mounted on the first lifting device 3231 and adapted to be driven by the first lifting device 3231 to move up and down relative to the base 311. The first gripper 3232 includes two opposing first gripping fingers. The second clamping fixture 323A includes a second lifting device 3231A and a second gripper 3232A. The second lifting device 3231A is mounted on the base 311, and the second gripper 3232A is mounted on the second lifting device 3231A and adapted to be driven by the first lifting device 3231A to move up and down relative to the base 311. Driven by the second lifting device 3231A, the optical module moves up and down relative to the base 311. The second gripper 3231 includes two opposing sheet-like gripping fingers, the opening and closing range of which is smaller than that of the two first gripping fingers. The first gripping fixture 323 is used to pick up the optical module by gripping both sides of the optical module, and the second gripping fixture 323A is used to pick up the optical module by gripping the heat dissipation fins on the top of the optical module. The negative pressure adsorption fixture 324 includes a third lifting device 3241 and a pair of suction cups 3242. The third lifting device 3241 is mounted on the base 311, and the suction cups 3242 are mounted on the third lifting device 3241 and adapted to be driven by the third lifting device 3241 to move up and down relative to the base 311. The negative pressure adsorption fixture 324 picks up the optical module by adsorbing the top of the optical module.

[0084] It is worth mentioning that the first and second picking components can be of the same type, i.e., the first clamping fixture 323 and the second clamping fixture 323A, or different types of picking components can be used, i.e., the first clamping fixture 323 and the negative pressure adsorption fixture 324. The selection of the second clamping fixture 323A and the negative pressure adsorption fixture 324 can adapt to different optical modules. The robotic arm 32 uses the second clamping fixture 323A or the negative pressure adsorption fixture 324 to pick up the optical modules in the loading area and place them in the unloading area 70, so as to remove the optical modules from the neatly arranged multiple optical modules and to neatly arrange the optical modules for unloading. The robotic arm 32 uses the first clamping fixture 323 to grasp both sides of the optical module to insert or remove the optical module from the tester 50. In this way, different models or types of picking components can be used to adapt to different shapes of optical modules and different processes, meeting the needs of automated production.

[0085] Specifically, in practical implementation, the robotic arm 32 may also be equipped with the first clamping fixture 323, the second clamping fixture 323A, and the negative pressure adsorption fixture 324 simultaneously to meet different production needs. It is understood that in some embodiments, only the first clamping fixture 323, and one of the second clamping fixture 323A and the negative pressure adsorption fixture 324 may be provided.

[0086] It is worth mentioning that the negative pressure adsorption fixture 324 includes a suction cup bracket 3243, which is mounted on the third lifting device 3241 and is adapted to be driven by the third lifting device 3241 to move up and down relative to the base 311. The suction cup bracket 3243 includes a pair of parallel mounting slots, and the two suction cups 3242 are respectively mounted in the two mounting slots. The suction cups 3242 can move in the corresponding mounting slots so that the relative distance between the two suction cups 3242 can be adjusted to accommodate more products of different specifications.

[0087] Furthermore, the robotic arm 32 includes a six-dimensional force sensor 325, which is disposed between the base 321 and the end of the robotic arm 31 to measure the force and torque experienced by the robotic arm 32 during operation in real time, thereby achieving high-precision control and feedback, and effectively reducing the probability of damage to the optical module.

[0088] It is worth mentioning that the bottom of the base 326 is provided with an adsorption device 326, which is used to adsorb the corresponding tray. The tray is used to place the optical module. That is, the robotic arm 30 can adsorb the tray onto the test bench for automated interleaving optical module testing to realize the handling of the optical module. In actual production, the raw materials are transported to the vicinity of the machine 100 by an automated transport vehicle. The robotic arm 30 then adsorbs the tray with untested optical modules on the automated transport vehicle onto the machine 100. When the tested optical modules fill a tray, the test bench for automated interleaving optical module testing calls the automated transport vehicle. The robotic arm 30 then moves the tray with the tested optical modules onto the automated transport vehicle, thus realizing a fully automated testing process.

[0089] Furthermore, the loading area 10 is provided with at least one raw material tray for placing optical modules awaiting testing. The unloading area 70 includes a finished product tray 71 and at least one unfinished product tray. The finished product tray 71 is used to place optical modules that have passed testing, and the unfinished product tray is used to place optical modules that have failed testing by the end-of-life inspection instrument and / or the testing instrument. The robotic arm 30 places the optical modules in the finished product tray 71 or the unfinished product tray based on the test results. This sorting of optical modules based on their test results facilitates rapid identification and processing of optical modules with different test results, thereby improving work efficiency.

[0090] Specifically, the unloading area 70 includes an end-inspection NG tray 72 and a test NG tray 73. The end-inspection NG tray 72 is used to place optical modules that fail the end-inspection test, and the test NG tray 73 is used to place optical modules that fail the test of the tester 50. The robotic arm 30 is configured to place the optical module in the end-inspection NG tray 72 when the end-inspection test result of the end-inspection instrument 40 is unqualified, and to place the optical module in the end-inspection NG tray 73 when the test result of the tester 50 is unqualified. This facilitates subsequent analysis of the optical modules with unqualified test results, thereby providing feedback for production and taking targeted improvement measures, which is conducive to improving the product quality of optical modules.

[0091] Furthermore, the unloading area 70 further includes a spare pallet 74, which is used to serve as the pallet when one of the end-inspection NG pallet 72, the test NG pallet 73, and the clinker pallet 71 is full of optical modules. For example, when the clinker pallet 71 is full of optical modules, the optical module testing platform calls the automated transport vehicle. When the automated transport vehicle has not yet arrived, the robotic arm 30 places the subsequently inspected optical modules into the spare pallet 74. The spare pallet 74 is then used as the clinker pallet 71, thereby enabling continuous testing of optical modules and avoiding the impact of material handling progress on the testing progress.

[0092] It is worth mentioning that the raw material pallet 10, the cooked material pallet 71, the end inspection NG pallet 72, the test NG pallet 73, and the spare pallet 74 are preferably set to the same specifications and dimensions, which is conducive to unified procurement and management, and can also be used interchangeably in the production process to rationally allocate resources.

[0093] It is understood that the positions of the raw material tray 10, the cooked material tray 71, the end-inspection NG tray 72, the test NG tray 73, and the spare tray 74 on the optical module test platform can be adaptively adjusted. The positions and arrangements of the raw material tray 10, the cooked material tray 71, the end-inspection NG tray 72, the test NG tray 73, and the spare tray 74 shown in Figure 3 do not constitute a limitation of the present invention.

[0094] Furthermore, the tester 50 can fully test the performance of the optical module at different temperatures by changing the temperature of the optical module. Specifically, the tester 50 includes at least one test port 51 and at least one preheating port 52. The robotic arm 30 inserts the optical module into the preheating port 52 to adjust the temperature of the optical module through the preheating port 52, and the robotic arm 30 inserts the optical module into the test port 51 for testing. Correspondingly, in this embodiment of the present invention, the tester 50 is provided with two test ports 51 and two preheating ports 52, and the machine 100 is provided with two testers 50, thereby effectively improving the testing efficiency. The automated interleaved optical module testing test bench can execute the testing process of multiple optical modules at the same time. The two testers 50 are arranged on both sides of the end-detector 40 to facilitate the robotic arm 30 to pick up the optical module to the designated position.

[0095] Specifically, the machine tool 100 is provided with two fiber optic insertion and extraction stations 60, which are located on both sides of the robotic arm 30 and correspond to the two testing instruments 50 respectively, so as to facilitate the robotic arm 30 to pick up the optical mode to the designated position.

[0096] It is worth mentioning that the fiber optic insertion / removal station 60 cleans the fiber optic head before inserting it into the optical module to remove any dust, impurities, or other contaminants that may be present in the fiber optic head, thus preventing contaminants from affecting test results and damaging the optical module.

[0097] Specifically, referring to Figures 6 to 9, the fiber optic insertion / removal station 60 includes an optical module mounting base 61, a cleaning section 62, and a fiber optic insertion / removal socket 63. The optical module mounting base 61, the cleaning section 62, and the fiber optic insertion / removal socket 63 are arranged longitudinally, with the longitudinal direction serving as the insertion / removal direction for the fiber optic head. The optical module mounting base 61 and the cleaning section 62 are vertically and flexibly mounted on the machine base 100. The robotic arm 30 places the optical module in the optical module mounting base 61. The fiber optic insertion / removal station 60 includes a cleaning section 62 that rises between the optical module mounting base 61 and the fiber optic insertion / removal base 63 before the fiber optic head is inserted into the optical module. The fiber optic insertion / removal base 63 moves the fiber optic head toward the cleaning section 62 so that the fiber optic head contacts the cleaning section 62 and is cleaned. After cleaning, the fiber optic insertion / removal base 63 moves away from the cleaning section 62, and the cleaning section 62 descends to avoid obstructing the fiber optic insertion / removal base 63 from inserting the fiber optic head into the optical module placed on the optical module mounting base 61.

[0098] Furthermore, the optical module mounting base 61 includes a lifting device 611, a lifting seat 612, and a clamping seat 613. The lifting device 611 is mounted on the machine base 100, the lifting seat 612 is mounted on the lifting device 611 and is adapted to be raised or lowered by the lifting device 611, and the clamping seat 613 is disposed on the lifting seat 612 and includes two opposing limiting walls 6131. ​​The robotic arm 30 places the optical module in the fiber optic insertion / removal station 60 with the optical module placed between the two limiting walls 6131. ​​The distance between the two limiting walls 6131 is adjustable to clamp the optical module, thereby clamping and fixing the optical module.

[0099] To enhance the positioning of the optical module, the optical module mounting base 61 includes a pressing part 614, which comprises a rotary lifting base 6141 and a pressing rod 6142. The bottom of the rotary lifting base 6141 is mounted on the lifting base 612, and the top of the rotary lifting base 6141 has an upwardly extending rotating telescopic rod 61411. The pressing rod 6142 is connected to the rotating telescopic rod 61411 and has an extension direction perpendicular to the axial direction of the rotating telescopic rod 61411. When the robotic arm 30 places the optical module between the two limiting walls 6131, the two limiting walls 6131 move relative to each other to clamp the optical module between them. The rotating telescopic rod 61411 rises and rotates to move the pressing rod 6142 above the optical module and retracts downward so that the pressing rod 6142 presses the optical module. This limits and fixes the optical module, ensuring stability when inserting or removing the fiber optic head and helping to avoid damage to the optical module when inserting or removing the fiber optic head.

[0100] It is worth mentioning that the pressing rod 6142 is L-shaped and one end of it is connected to the rotating telescopic rod 61411. A pressing block 61421 is mounted on the other end of the pressing rod 6142. One end of the pressing rod 6142 is mounted to the rotating telescopic rod 61411 and has a pressing arm extending from that end. The pressing arm extends linearly from that end of the pressing rod 6142 in a direction perpendicular to the axial direction of the rotating telescopic rod 61411, and then is bent and extends in a direction perpendicular to the axial direction of the rotating telescopic rod 61411. The direction continues to extend to form an L-shape. The pressing rod 6142 presses the optical module with the pressing block 61421 abutting against the top of the optical module. The pressing block 61421 can form a pressing buffer for the optical module to avoid damage to the optical module. The pressing block 61421 is detachably installed on the pressing rod 6142, which can be adapted to different sizes of optical modules by replacing the pressing block 61421, and facilitates maintenance work and reduces maintenance costs by removing and replacing the pressing block 61421.

[0101] Further, the fiber optic plug-in socket 63 includes a longitudinal moving base 631, a transverse moving base 632, a transverse clamping device 633, and a lifting unlocking device 634. The transverse moving base 632 is mounted on the longitudinal moving base 631 and moves along the longitudinal direction with the longitudinal moving base 631. The transverse clamping device 633 is mounted on the transverse moving base 632 and includes two clamping arms 6331 facing each other in the transverse direction. The distance between the two clamping arms 6331 is adjustable to accommodate the fiber optic tip. The lifting unlocking device 634 is jackingly mounted on the transverse moving base 632 and is used to press down the fiber optic tip clamped between the two clamping arms 6331 so that the fiber optic tip can be inserted into the optical module.

[0102] Specifically, when inserting the fiber optic connector into the optical module, the lifting unlocking device 634 presses down on the fiber optic connector clamped between the two clamping arms 6331. The longitudinal moving seat 631 drives the transverse moving seat 632 forward to insert the fiber optic connector into the optical module. The two clamping arms 6331 move away from each other to release the fiber optic connector. The longitudinal moving seat 631 drives the transverse moving seat 632 backward to complete the insertion of the fiber optic connector. When removing the fiber optic connector from the optical module, after the optical module is fixed by the optical module fixing seat 61, the longitudinal moving seat 631 drives the transverse moving seat 632 forward. The two clamping arms 6331 move closer to each other to clamp the fiber optic connector inserted into the optical module. The lifting unlocking device 634 presses down to unlock the fiber optic connector. The longitudinal moving seat 631 drives the transverse moving seat 632 backward to remove the fiber optic connector. This automated insertion and removal of the fiber optic connector allows for controllable control of the insertion and removal force, effectively avoiding the risk of damage to the optical module caused by manual insertion and removal.

[0103] Further referring to Figures 9 and 10, the fiber optic insertion / removal station 60 further includes a fiber optic head support 64, which is used to mount the corresponding fiber optic head, so that fiber optic heads of different specifications can be matched with the lateral clamping device 633. The corresponding fiber optic head is applied to the test bench for automated insertion and removal of optical modules in the state of being mounted on the fiber optic head support 64, and is placed on the lateral clamping device 633 and the inserted optical module in the state of being mounted on the fiber optic head support 64. That is, the fiber optic head support 64 is used as an accessory for the fiber optic head so that the fiber optic insertion / removal station 60 can match fiber optic heads of different specifications and shapes.

[0104] Furthermore, the test bench for automated interleaving optical module testing includes a barcode scanning station 20, which is set on the machine 100 and used to identify optical modules. Before the optical module is placed on the end-point inspection instrument 40, the robotic arm 30 moves the optical module to the barcode scanning station 20 for identification, thereby determining the identity of each optical module, which facilitates the tracking, management and data recording of the optical modules, and facilitates subsequent analysis and traceability.

[0105] It is worth mentioning that, in this embodiment of the present invention, the robotic arm 30 is positioned to move the optical module to the barcode scanning station 20 before inserting the optical module into the test port 51 of the tester 50, so as to re-identify the optical module during the testing phase of the optical module entering the tester 50, which is conducive to accurately corresponding the test results of the optical module and avoids test result confusion under multiple interleaved optical module test processes. The machine 100 is provided with two barcode scanning stations 50, which are symmetrically arranged on both sides of the robotic arm 30, so as to facilitate the robotic arm 30 to move the optical module to the corresponding barcode scanning station 20 for identification.

[0106] Specifically, the loading area 10, the barcode scanning station 20, the end-of-line inspection device 40, the tester 50, the fiber optic insertion / removal station 60, and the unloading area 70 are arranged around the robotic arm 30 to facilitate the transfer of optical modules by the robotic arm 30, which helps to improve testing efficiency and makes the structure of the automated optical module testing station compact. At the same time, the stations can be added or improved according to actual needs, so as to flexibly adjust the stations according to testing requirements.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A test bench for automating and interleaving optical module testing, characterized in that, include: A machine tool, wherein the machine tool is provided with a loading area and a unloading area; An end-face inspection device, wherein the end-face inspection device is installed on the machine and is used to perform end-face inspection on the optical module; Fiber optic insertion and removal station, wherein the fiber optic insertion and removal station is set on the machine and is used to insert fiber optic heads into optical modules and remove fiber optic heads from optical modules. A testing instrument, wherein the testing instrument is set on the machine and is used to test the optical module; as well as A robotic arm, wherein the robotic arm is disposed on the machine base and includes a first pickup and a second pickup, wherein the first pickup and the second pickup are used to pick up an optical module, wherein the robotic arm transfers the optical module between the loading area, the end-of-line inspection instrument, the fiber optic insertion / removal station, the testing instrument, and the unloading area based on the following steps: A. The robotic arm picks up the first optical module; B. The robotic arm places the first optical module on the end-face inspection device, and the end-face inspection device performs end-face inspection on the first optical module. C. The robotic arm pulls out the second optical module that has completed the test from the tester and places the second optical module in the fiber optic plugging station, and picks up the second optical module after the fiber optic head on the second optical module is pulled out. D. The robotic arm places the first optical module at the fiber optic insertion / removal station, and inserts the first optical module into the tester after the fiber optic head is inserted into the first optical module. E. The robotic arm places the second optical module in the unloading area and returns to step A.

2. The test bench for automated interleaving optical module testing according to claim 1, wherein the robotic arm includes a robotic arm and a robotic hand disposed at one end of the robotic arm, wherein the other end of the robotic arm is mounted on the test bench, wherein the robotic hand includes a base and a visual positioning sensor, wherein the first pickup, the second pickup and the visual positioning sensor are mounted on different sides of the base.

3. The test bench for automated interleaving optical module testing according to claim 2, wherein the first pickup and the second pickup are of the same type.

4. The test bench for automated interleaving optical module testing according to claim 3, wherein the first pickup includes a first lifting device and a first gripper, wherein the first lifting device is mounted on the base, the first gripper is mounted on the first lifting device and adapted to be driven by the first lifting device to move up and down relative to the base, wherein the first gripper includes two opposing first gripping fingers, wherein the second pickup includes a second lifting device and a second gripper, wherein the second lifting device is mounted on the base, the second gripper is mounted on the second lifting device and adapted to be driven by the second lifting device to move up and down relative to the base, wherein the second gripper includes two opposing sheet-like gripping fingers, wherein the opening and closing range of the two sheet-like gripping fingers is smaller than the opening and closing range of the two first gripping fingers.

5. The test bench for automated interleaving optical module testing according to claim 4, wherein the robotic arm further includes a negative pressure adsorption fixture, wherein the negative pressure adsorption fixture includes a third lifting device and a pair of suction cups, wherein the third lifting device is mounted on the base, and the suction cups are mounted on the third lifting device and adapted to be driven by the third lifting device to move up and down relative to the base.

6. The test bench for automated interleaving optical module testing according to claim 2, wherein the first pickup includes a first lifting device and a first gripper, wherein the first lifting device is mounted on the base, the first gripper is mounted on the first lifting device and adapted to be driven by the first lifting device to move up and down relative to the base, wherein the first gripper includes two opposing first gripping fingers, wherein the second pickup includes a third lifting device and a pair of suction cups, wherein the third lifting device is mounted on the base, the suction cups are mounted on the third lifting device and adapted to be driven by the third lifting device to move up and down relative to the base.

7. The test bench for automated interleaving optical module testing according to claim 2, wherein the robotic arm includes a six-dimensional force sensor, wherein the six-dimensional force sensor is disposed between the base and the robotic arm.

8. The test stand for automated interleaving optical module testing according to claim 2, wherein the robotic arm includes an adsorption device, wherein the adsorption device is disposed at the bottom of the base, and wherein the adsorption device is used to adsorb the corresponding tray.

9. The test bench for automated interleaving optical module testing according to claim 1, wherein the loading area is provided with at least one raw material tray for placing optical modules awaiting testing, wherein the unloading area includes a raw material tray and at least one NG tray, wherein the raw material tray is used to place optical modules that have passed the test, wherein the NG tray is used to place optical modules that have failed the end-point inspection instrument and / or the test instrument, wherein the robotic arm places the optical modules on the raw material tray or the NG tray based on the test results of the optical modules.

10. The test bench for automated interleaving optical module testing according to claim 9, wherein the unloading area includes an end-inspection NG tray and a test NG tray, wherein the end-inspection NG tray is used to place optical modules that fail the end-inspection test, and the test NG tray is used to place optical modules that fail the test of the tester, wherein the robotic arm is configured to place the optical module in the end-inspection NG tray when the end-inspection test result of the end-inspection instrument is unqualified, and to place the optical module in the end-inspection NG tray when the test result of the tester is unqualified.

11. The test bench for automated interleaving optical module testing according to claim 10, wherein the unloading area further includes a spare tray, wherein the spare tray is used as such a tray when one of the end-inspection NG tray, the test NG tray and the finished product tray is full of optical modules.

12. The test bench for automated interleaving optical module testing according to claim 1, wherein the tester includes at least one test port and at least one preheating port, wherein the preheating port is used to change the temperature of the optical module, and the test port is used to test the optical module.

13. The test bench for automated interleaving optical module testing according to claim 1, wherein the test bench for automated interleaving optical module testing includes a barcode scanning station, wherein the barcode scanning station is set on the machine and used to identify the optical module, wherein before the optical module is placed on the end-point tester, the robotic arm moves the optical module to the barcode scanning station for identification.

14. The test bench for automated insertion and removal of optical modules according to claim 1, wherein the fiber optic insertion / removal station includes an optical module mounting base, a cleaning section, and a fiber optic insertion / removal socket, wherein the optical module mounting base, the cleaning section, and the fiber optic insertion / removal socket are arranged longitudinally, the fiber optic insertion / removal station is positioned with the longitudinal direction as the insertion / removal direction of the fiber optic head, wherein the optical module mounting base and the cleaning section are vertically and vertically mounted on the machine, wherein the robotic arm places the optical module in the fiber optic insertion / removal station with the optical module mounted in the optical module mounting base, wherein the cleaning section rises between the optical module mounting base and the fiber optic insertion / removal socket before the fiber optic head is inserted into the optical module, the fiber optic insertion / removal socket moves the fiber optic head toward the cleaning section so that the fiber optic head contacts the cleaning section and is cleaned, and after cleaning, the fiber optic insertion / removal socket moves away from the cleaning section, and the cleaning section descends.

15. The test bench for automated insertion and insertion testing of optical modules according to claim 14, wherein the optical module fixing seat includes a lifting device, a lifting seat, and a clamping seat, wherein the lifting device is installed on the machine bench, the lifting seat is installed on the lifting device and is adapted to be driven to rise or fall by the lifting device, wherein the clamping seat is disposed on the lifting seat and includes two opposing limiting walls, the robotic arm places the optical module in the fiber insertion / extraction station with the optical module placed between the two limiting walls, and the distance between the two limiting walls is adjustable for clamping the optical module.

16. The test bench for automated interleaving optical module testing according to claim 15, wherein the optical module mounting base includes a pressing part, wherein the pressing part includes a rotary lifting base and a pressing rod, wherein the bottom of the rotary lifting base is mounted on the lifting base, the top of the rotary lifting base has an upwardly extending rotary telescopic rod, wherein the pressing rod is connected to the rotary telescopic rod and has an extension direction perpendicular to the axial direction of the rotary telescopic rod.

17. The test bench for automated interleaving optical module testing according to claim 16, wherein the pressing rod is L-shaped and one end of it is connected to the rotating telescopic rod, and the other end of the pressing rod is equipped with a pressing block.

18. The test bench for automated insertion and insertion testing of optical modules according to claim 17, wherein the fiber optic plug-in socket includes a longitudinal moving seat, a transverse moving seat, a transverse clamping device, and a lifting unlocking device, wherein the transverse moving seat is mounted on the longitudinal moving seat and moves along the longitudinal direction following the longitudinal moving seat, wherein the transverse clamping device is mounted on the transverse moving seat and includes two clamping arms opposite each other in the transverse direction, the distance between the two clamping arms is adjustable to be suitable for clamping the fiber optic head, wherein the lifting unlocking device is jackingly mounted on the transverse moving seat and is used to press down the fiber optic head clamped between the two clamping arms so that the fiber optic head can be inserted into the optical module.

19. The test bench for automated interleaving optical module testing according to claim 13, wherein the loading area, the barcode scanning station, the end-point inspection instrument, the test instrument, the fiber optic insertion / removal station, and the unloading area are arranged around the robotic arm.

20. The test bench for automated insertion and insertion testing of optical modules according to claim 19, wherein the number of the tester and the insertion / removal station is two, the two insertion / removal stations are arranged on both sides of the robotic arm, and the two testers correspond to the two insertion / removal stations respectively.

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