A high-enclosure custom optical module three-temperature test device and method

Abstract

The application discloses a kind of high airtightness customized light module three temperature test device and test method, the three temperature test device includes test plate fixed base, hand screw guide mechanism, temperature measuring cover, heat preservation cover and heat flow instrument connector;Spring mechanism is arranged in the temperature measuring cover, the spring mechanism is used to press the temperature sensing cable in the surface of customized light module;The heat preservation cover is coated outside temperature measuring cover, the temperature measuring cover is connected with the heat preservation cover by threaded pressure pipe and can be relatively moved up and down the heat preservation cover;The heat flow instrument connector is movably docked at the air inlet of the threaded pressure pipe.This application also discloses a kind of customized light module three temperature test method.This application can improve the installation operation problem of bottom screw fixed type customized light module in relatively closed test space, and is favorable to reduce the possibility of condensation in low temperature test process.

Description

Technical Field

[0001] This invention relates to the field of optical communication device testing equipment technology, and in particular to a high-sealing customized optical module three-temperature testing device and method. Background Technology

[0002] Optical modules are core components in optical communication systems, primarily used for converting electrical signals to optical signals. With the rapid development of 5G, data centers, and the Industrial Internet, optical modules are widely used in various scenarios with drastic temperature variations, such as indoor temperature-controlled computer rooms, outdoor base stations, and industrial sites. In these complex environments, the lasers, detectors, and related electrical chips inside the optical modules are extremely sensitive to temperature, and their performance parameters, such as optical power, extinction ratio, and bit error rate, change significantly with temperature. Therefore, conducting three-temperature tests (high temperature, normal temperature, and low temperature) has become an essential step in the manufacturing and reliability verification of optical modules, directly affecting the stability and reliability of the product in practical applications.

[0003] In existing technologies, three-temperature testing of optical modules mainly employs two methods. One type is an integrated high and low temperature test chamber, which places the test board and optical module entirely within the chamber, achieving temperature control through air circulation within the chamber. While this method provides a stable temperature environment, it suffers from drawbacks such as large chamber size, slow heating and cooling rates, high energy consumption, and difficulty in achieving rapid single-module testing. The other type uses a heat flow meter in conjunction with a local temperature control hood. The heat flow meter delivers dry gas at a specified temperature into the temperature control hood through gas pipes, achieving rapid local temperature control of the optical module, while a temperature sensing probe is installed inside the hood to monitor the module's surface temperature.

[0004] A representative existing technology, such as the temperature testing device for optical modules disclosed in CN115333619A, includes a sealed outer casing, a top temperature control module, a bottom temperature control module, and an optical module test board housed within the sealed outer casing, as well as a pressing structure that penetrates the top of the sealed outer casing and is mechanically connected to the top temperature control module. This device uses the pressing structure to raise and lower the top temperature control module, clamping the optical module between the upper and lower temperature control modules to achieve heat conduction-based temperature control, aiming to improve heating and cooling efficiency and reduce compressed air energy consumption. This technology, along with industry-common heat flow meters and single-layer temperature measuring hood solutions, is mainly suitable for testing pluggable optical modules. In actual operation, the test board is fixed to the base, and the optical module is inserted into the optical cage to complete power supply and signal connection. The temperature measuring hood is fastened above the optical module to form a sealed space, and dry gas is introduced through the heat flow meter for temperature control.

[0005] However, the existing technologies still have the following shortcomings in practical applications: First, during low-temperature testing, especially below 0°C, the outer surface of the single-layer temperature measuring cover is prone to icing or condensation upon contact with indoor air. This not only affects the accuracy of temperature measurement but may also cause condensate to seep into and corrode the test board and optical module, reducing the equipment's lifespan. Second, the existing solutions are mainly designed for pluggable optical modules. For customized optical modules that use bottom screw fixing, the compatibility is poor, and the installation and removal process requires multiple manual alignments and screw tightenings, making the operation cumbersome and the loading and unloading efficiency low. Third, the existing sealed outer cover or pressure-type structure cannot simultaneously meet the requirements of rapid installation space and stable sealing when dealing with screw-fixed customized modules, resulting in an inconvenient overall testing process.

[0006] In view of the shortcomings of existing technologies in terms of low-temperature anti-icing capability, compatibility with customized optical modules, and ease of operation, this invention aims to provide a highly airtight customized optical module three-temperature testing device. Through optimized structural design, it achieves efficient and reliable three-temperature testing of customized optical modules with bottom screw fixing. Summary of the Invention

[0007] To address all or part of the problems in the prior art, this invention provides both a highly airtight, three-temperature testing device for customized optical modules and a method for testing customized optical modules at three temperatures. This effectively isolates the contact between indoor air and the outer surface of the enclosure in low-temperature environments, significantly reducing the risk of icing or condensation on the enclosure surface during testing below 0°C. This improves the accuracy of temperature measurement and the reliability of test results, while also reducing potential corrosion to the test board and customized optical modules, extending the equipment's lifespan, and meeting the reliability verification requirements of customized optical modules in complex temperature environments.

[0008] This invention provides a high-sealing customized optical module three-temperature testing device, comprising: Test board mounting base, used to fix the test board and raise the test board; A hand-tightening screw guide mechanism is located above the test board to guide the tightening of the bottom fixing screws of the custom optical module; A temperature measuring cover, wherein a spring mechanism is provided inside the temperature measuring cover, the spring mechanism being used to press the temperature sensing cable onto the surface of the customized optical module; A heat insulation cover, which encloses the temperature measuring cover, is connected to the heat insulation cover via a threaded pressure tube and can move vertically relative to the heat insulation cover; and A heat flow meter connector, which is movably connected to the air inlet of the threaded pressure tube.

[0009] Furthermore, the temperature measuring cover is provided with an exhaust port, which is used to allow dry gas to enter the interior of the heat insulation cover.

[0010] Furthermore, the surface of the heat insulation cover is covered with heat insulation material.

[0011] Furthermore, a limiting frame is provided on the test board fixing base, and the limiting frame is used to position the customized optical module.

[0012] Furthermore, the heat flow meter connector is moved by a robotic arm to mate with or disconnect the threaded pressure pipe inlet.

[0013] Furthermore, the threaded pressure tube is used to fix the position of the temperature measuring cover and, when lifted, moves the entire temperature measuring cover upward to reserve installation space.

[0014] Furthermore, the total opening area of ​​the exhaust port is less than 1 / 2 of the cross-sectional area of ​​the air inlet.

[0015] This application also provides a customized three-temperature testing method for optical modules, including the following steps: S1. Remove the heat flow meter connector, open the insulation cover, unscrew the threaded pressure tube and pull the temperature measuring cover upward; S2. Place the customized optical module within the limiting frame of the test board fixing base, and tighten the bottom fixing screws using the hand-tightening screw guide mechanism; S3. Press down the temperature measuring cover so that the spring mechanism inside the temperature measuring cover presses the temperature sensing cable onto the surface of the customized optical module, and tighten the threaded pressure tube to fix the temperature measuring cover. S4. Connect the movable heat flow meter connector to the threaded pressure tube inlet and fix it in place; S5. Introduce dry gas at a specified temperature into the temperature measuring hood and conduct low temperature, normal temperature, and high temperature tests in sequence. S6. After the test is completed, lift the temperature measuring cover, loosen the screws, and take out the customized optical module.

[0016] Furthermore, the heat flow meter connector is used to deliver high-temperature airflow, normal-temperature airflow, or low-temperature airflow to the test space for three-temperature testing of the customized optical module.

[0017] Furthermore, in step S5, the dry gas enters the interior of the insulation cover through the exhaust port on the temperature measuring cover.

[0018] Furthermore, the front door of the insulation cover can be opened, and the test plate fixing base raises the test plate to facilitate the operator to tighten the bottom screws.

[0019] Compared with the prior art, the main beneficial effects of the present invention are as follows: 1. This application raises the test board by setting a test board fixing base, creating an operating space at the bottom of the test board. Combined with a hand-tightening screw guiding mechanism, it can improve the installation and operation problem of bottom screw-fixed customized optical modules in a relatively enclosed test space, thereby improving the convenience of module installation.

[0020] 2. This application sets up a temperature measuring cover that can move up and down, and uses a threaded pressure tube to fix and release the position of the temperature measuring cover. During the module installation process, the temperature measuring cover can be lifted to reserve operating space, and during the testing process, a relatively closed testing environment can be formed, thus taking into account both assembly operation requirements and testing environment requirements.

[0021] 3. This application improves the contact stability during temperature detection by incorporating a spring mechanism inside the temperature measuring cover, which allows the temperature sensing cable to be stably pressed against the surface of the customized optical module.

[0022] 4. This application provides an insulation cover outside the temperature measuring cover and an exhaust vent on the temperature measuring cover, allowing the dry gas inside the temperature measuring cover to enter the insulation cover, thereby reducing the possibility of condensation when external air enters the test area during low-temperature testing.

[0023] 5. This application reduces the impact of the heat flow meter connector on the module installation and operation space by setting a movable docking heat flow meter connector, which allows the heat flow meter connector to switch between the testing state and the installation state.

[0024] 6. This application enables customized optical modules to undergo three-temperature testing in low-temperature, normal-temperature, and high-temperature environments, and is beneficial to improving the structural adaptability and operational convenience during the testing process of customized optical modules. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a high-sealing customized optical module three-temperature testing device according to an embodiment of the present invention.

[0026] Figure 2 This is a partially enlarged structural diagram of the hand-tightening screw guide mechanism in a blind-tightening state under the test plate, according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the temperature measuring cover, limiting frame, and temperature sensing structure according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the temperature measuring cover in the raised state according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the exhaust port of the temperature measuring cover and the gas flow inside the heat insulation cover according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram showing the top detail of the heat insulation cover according to an embodiment of the present invention.

[0031] Figure 7 This is a flowchart of the customized optical module three-temperature test method according to an embodiment of the present invention.

[0032] 1. Test board fixing base; 11. Limit frame; 2. Hand-tightening screw guide mechanism; 3. Temperature measuring cover; 31. Spring mechanism; 32. Temperature sensing cable; 33. Exhaust port; 34. Air inlet pipe; 4. Insulation cover; 41. Cable outlet; 5. Heat flow meter connector; 51. Robotic arm; 6. Threaded pressure tube; 7. Custom optical module; 8. Heat flow meter. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. The specific implementation methods described in this invention are only used to illustrate the technical solutions of this invention and are not intended to limit the scope of protection of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] Example 1 This application relates to a high-sealing, custom-designed optical module three-temperature testing device for low-temperature, room-temperature, and high-temperature testing of bottom-screw-fixed custom optical modules. The device creates a locally temperature-controlled testing environment through a temperature measuring cover, an insulation cover, and a heat flow meter connector. It also incorporates a height-adjustable temperature measuring structure and a hand-tightening screw guide structure to improve the ease of installation of the custom optical module in a relatively enclosed testing space and its adaptability to low-temperature testing. Figure 1 As shown, the high-sealing customized optical module three-temperature testing device of this application includes a test board fixing base 1, a hand-tightening screw guiding mechanism 2, a temperature measuring cover 3, a heat insulation cover 4, and a heat flow meter connector 5.

[0035] The test board mounting base 1 is used to fix the test board and raise it to a height that is easy to operate. Figure 2 As shown, the test board fixing base 1 is set above the work platform and horizontally on the bottom surface of the heat insulation cover mechanism. It includes multiple vertically set support columns. The top of the support columns is used to fix and install the test board so that the test board is horizontally suspended relative to the bottom surface of the heat insulation cover 4, and an operating space is formed below the test board. That is, the test board fixing base 1 raises the test board as a whole, so that the operator can easily reach under the test board to tighten the bottom fixing screws of the customized optical module.

[0036] Furthermore, such as Figure 3 As shown, a limiting frame 11 is provided on the test board fixing base 1, which is used to limit the position of the customized optical module 7. Preferably, the limiting frame 11 is adapted to the outer contour of the customized optical module 7 to reduce installation deviation and improve positioning stability.

[0037] like Figure 2As shown, the hand-tightening screw guide mechanism 2 is located below the test plate and corresponds to the bottom fixing screw of the customized optical module 7, used to guide the operator to complete the tightening operation of the bottom fixing screw. Specifically, since the customized optical module 7 is fixed by bottom screws, and the temperature measuring cover 3 and the heat insulation cover 4 form a relatively closed space during the test, it is difficult for the operator to directly observe the position of the bottom screw hole under normal installation methods. To improve the convenience of installation in a confined space, this embodiment provides a hand-tightening screw guide mechanism 2. The hand-tightening screw guide mechanism 2 includes a guide structure located below the test plate. The guide structure has a guide hole coaxial with the bottom screw hole of the customized optical module. The lower end of the guide hole is formed into an outwardly opening inverted conical guide slope, which can accurately guide the screw to align with the threaded hole at the bottom of the customized optical module, ensuring that the screw is tightened quickly and accurately. Preferably, the guide structure may include one or more of the following: guide hole, guide groove, guide sleeve, or funnel-shaped guide structure, to guide the movement direction of the screwdriver or installation tool, thereby assisting in the quick alignment and installation of the bottom fixing screw.

[0038] A temperature measuring cover 3 is positioned above the test plate, forming a test space between it and the test plate to accommodate the customized optical module 7. The temperature measuring cover 3 may be a transparent structure with an internal spring mechanism. Figure 3 As shown, the spring mechanism is used to tightly press the probe of the temperature-sensing cable onto the temperature-sensing surface of the customized optical module 7, ensuring accurate and reliable temperature monitoring. Specifically, the spring mechanism 31 can adopt a compression spring, a spring sheet, or an elastic pressure plate. The temperature-sensing cable 32 is fixed to the lower end of the spring mechanism 31. During the pressing down of the temperature-sensing cover 3, the spring mechanism 31 generates an elastic clamping force, thereby making the temperature-sensing cable 32 stably contact the surface of the customized optical module 7 to achieve temperature detection. The temperature-sensing cover 3 is also provided with multiple exhaust holes 33, which are opened on the wall of the temperature-sensing cover 3. The exhaust holes 33 connect the internal temperature field space of the temperature-sensing cover 3 with the air isolation space of the insulation cover 4, so as to discharge the dry test gas after flowing through the surface of the customized optical module into the intermediate cavity between the insulation cover 4 and the temperature-sensing cover 3, thereby reducing the possibility of condensation after the external air enters the low-temperature area. Preferably, the exhaust holes 33 can be set at the top or side wall of the temperature-sensing cover 3 and can form a communication relationship with the hot gas flow direction.

[0039] In one embodiment of this application, the total opening area of ​​the exhaust port is less than 1 / 2 of the cross-sectional area of ​​the air inlet, so as to establish sufficient static pressure inside the temperature measuring cover 3. The cold air blown in by the heat flow meter 8 can form forced convection heat transfer on the surface of the optical module, so that the actual stable temperature of the temperature measuring area of ​​the customized optical module is highly consistent with the temperature collected by the temperature sensing probe.

[0040] The total opening area of ​​the exhaust port is preferably 1 / 3 to 1 / 4 of the cross-sectional area of ​​the air inlet. This area allocation ratio is predetermined based on the convective heat transfer static pressure requirements inside the temperature measuring cover 3 and the laminar flow shielding requirements inside the insulation cover 4.

[0041] like Figure 4 The temperature measuring cover 3 is installed around the limiting frame 11, and a vertically upward extending air inlet pipe 34 is fixed to its top. The air inlet pipe 34 passes through the top plate of the heat insulation cover 3 and extends to its outside. A threaded pressure pipe 6 is provided on the outside of the air inlet pipe 34 and is threadedly connected to the top plate of the heat insulation cover 4. The vertical height of the air inlet pipe 34 is locked and the circumferential seal is achieved by tightening the threaded pressure pipe 6.

[0042] The heat insulation cover 4 covers the outside of the temperature measuring cover 3 and together with the test plate fixing base 1, forms a relatively closed heat insulation space. Figure 1 , Figure 4 and Figure 6 As shown, the insulation cover 4 has an openable structure for opening or closing the test space. The openable structure can be, for example, a front door. Insulation material is attached to the surface of the insulation cover 4 to isolate indoor air and reduce heat exchange during low-temperature testing. The insulation material can be rubber-plastic insulation cotton, thermal insulation foam, or other flexible insulation materials to reduce the impact of the external environment on the temperature stability of the test space. A cable outlet hole 41 is provided at the top of the insulation cover 4 for easy cable routing. A deformable rubber sealing plug is installed inside the cable outlet hole 41. After the test cable passes through, the rubber sealing plug forms a micro-resistance pressure relief channel between itself and the inner wall of the cable outlet hole 41, creating a micro-positive pressure dry microenvironment within the insulation cover 4 and preventing external moisture backflow.

[0043] The temperature measuring cover and the insulation cover form a double-layer structure. The combination of the double-layer structure, the vent, and the insulation material is used to reduce the risk of icing during low-temperature testing.

[0044] The temperature measuring cover 3 is connected to the insulation cover 4 via a threaded pressure tube 6 and can move up and down relative to the insulation cover 4. Figure 4 As shown, the threaded pressure tube 6 is used to fix the position of the temperature measuring cover 3. When the threaded pressure tube 6 is unscrewed, the temperature measuring cover 3 can be lifted upward as a whole, thereby reserving sufficient installation space. Preferably, when the threaded pressure tube 6 moves upward, it can drive the temperature measuring cover 3 to move upward synchronously, so as to reduce the obstruction of the installation space by the temperature measuring cover 3.

[0045] In this embodiment of the application, a locking structure is provided between the temperature measuring cover 3 and the test plate fixing base 1. The locking structure is used to fix the position of the temperature measuring cover in the test state and maintain stable test performance.

[0046] The heat flow meter connector 5 is moved by a robotic arm 51 to switch between testing and non-testing states. Figure 1 , Figure 4 As shown, the heat flow meter connector 5 is movably connected to the air inlet of the threaded pressure tube 6, and the bottom of the connector is tightly fitted to the insulation cover 4 to ensure reliable input of dry gas. Specifically, during the test, the robotic arm 51 drives the heat flow meter connector 5 to move to the air inlet position of the threaded pressure tube 6 and completes the connection, thereby delivering dry gas at the specified temperature into the temperature measuring cover 3; during installation or disassembly, the robotic arm 51 drives the heat flow meter connector 5 to detach from the threaded pressure tube 6 to avoid affecting the operating space.

[0047] The high-sealing customized optical module three-temperature testing device of this application also includes a heat flow meter, which is used to deliver high-temperature airflow, normal-temperature airflow or low-temperature airflow to the test space to perform three-temperature testing on the customized optical module.

[0048] The customized optical module three-temperature testing method in this embodiment is as follows: Figure 7 This includes the following steps: S1. Remove the heat flow meter connector, open the insulation cover, unscrew the threaded pressure tube and pull the temperature measuring cover upward; Before the test begins, the test platform is assembled according to the assembly drawings. First, loosen the fixing screws of the heat flow meter connector 5, and use the robotic arm to remove the heat flow meter connector 5 from the top of the insulation cover 4. Then, open the openable structure of the insulation cover 4, unscrew the threaded pressure tube 6, and pull the temperature measuring cover 3 upward to make room for the installation of the custom optical module.

[0049] S2. Place the customized optical module within the limiting frame of the test board fixing base, and tighten the bottom fixing screws using the hand-tightening screw guide mechanism; Next, the custom optical module is accurately placed in the designated position using the limiting frame on the test board fixing base 1. The bottom fixing screw is then tightened clockwise by the hand-tightening screw guide mechanism 2 to firmly fix the custom optical module on the test board.

[0050] S3. Press down the temperature measuring cover so that the spring mechanism inside the temperature measuring cover presses the temperature sensing cable onto the surface of the customized optical module, and tighten the threaded pressure tube to fix the temperature measuring cover. Subsequently, the temperature measuring cover 3 is pressed down, and under the action of the spring mechanism, the temperature sensing cable probe makes close contact with the surface of the customized optical module, and the threaded pressure tube 6 is tightened to fix the position of the temperature measuring cover 3.

[0051] S4. Connect the movable heat flow meter connector to the threaded pressure tube inlet and fix it in place; Use the robotic arm again to move the heat flow meter connector 5, align it with the air inlet of the threaded pressure tube 6 and fix it in place. At this time, the bottom of the connector is in close contact with the heat insulation cover 4.

[0052] S5. Introduce dry gas at a specified temperature into the temperature measuring hood and conduct low temperature, normal temperature, and high temperature tests in sequence. Turn on the heat flow meter 8 and fill the temperature measuring hood 3 with dry air at the specified temperature. Due to the exhaust port design on the temperature measuring hood 3, the dry gas can enter the interior of the insulation hood 4, so that both layers of the structure are filled with a dry environment. Perform low temperature, room temperature and high temperature tests in sequence. The low temperature test temperature is, for example, -40℃, the room temperature test temperature is, for example, 35℃, and the high temperature test temperature is, for example, 78℃.

[0053] S6. After the test is completed, lift the temperature measuring cover, loosen the screws, and take out the customized optical module.

[0054] After the test, pull the temperature measuring cover 3 upwards again, loosen the bottom fixing screws counterclockwise, and take out the customized optical module to complete the entire three-temperature test process.

[0055] Through the above structure and testing process, this application can achieve rapid installation and three-temperature testing of the bottom screw-fixed customized optical module in a relatively closed testing environment, and is conducive to improving the condensation effect during the low-temperature testing process and the convenience of installation operation.

[0056] Example 2 In this embodiment, the inner wall of the heat insulation cover 4 is further covered with a 5-10mm thick layer of heat insulation cotton material to further enhance the heat insulation performance. The temperature measuring cover 3 has three exhaust holes, which are evenly distributed on the side wall to ensure uniform gas flow.

[0057] The other structures are the same as in Example 1.

[0058] The specific working principle, operation procedure, and airflow circulation process of this device when conducting large-scale, long-term low-temperature (-40℃) reliability testing on customized non-standard optical modules are as follows: First, the lifting and removal action is performed: the operator loosens the external threaded pressure tube 6, lifts the air inlet pipe 34 vertically upwards, causing the internal temperature measuring cover 3 to rise vertically, exposing the lower limiting frame 11. Then, the blind tightening action is performed: the customized optical module 7 to be tested is placed horizontally within the limiting frame 11 on the upper surface of the test board. The operator reaches directly into the operating space below the suspended test board fixing base 1 from both sides, within a completely blind spot, and inserts the hand-tightening screw into the inverted conical guide slope at the bottom of the hand-tightening screw guide mechanism 2. Under the centripetal constraint guidance of the slope, the screw automatically eliminates the eccentricity angle and passes vertically through the through hole of the test board, precisely and accurately tightening and fixing it in the screw hole at the bottom of the customized optical module, avoiding the scrapping of the device due to stripped threads, and significantly improving the loading and unloading speed.

[0059] Then, the downward sealing action is performed: the inlet pipe 34 is pressed vertically downward, causing the temperature measuring cover 3 to be completely placed on the test plate and completely enclosing the limiting frame 11. The internal spring mechanism automatically presses the temperature sensing cable. The threaded pressure tube 6 is tightened to lock the inlet pipe 34 in place. At this time, the external heat flow meter 8 robotic arm is operated to vertically press the heat flow meter connector 5 against the top port of the inlet pipe 34, completing the air circuit closure.

[0060] Finally, the exhaust gas recirculation anti-icing process is executed: the heat flow meter 8 is activated, continuously injecting extremely low temperature dry gas with a preset test temperature of -40℃ into the inlet pipe 34. The gas is injected at high speed downwards along the inlet pipe 34 into the interior of the temperature measuring cover 3, causing intense forced convection heat transfer on the surface of the customized optical module 7, rapidly cooling it to the predetermined test state. Subsequently, driven by the static pressure generated by the continuous inflation of the heat flow meter 8, this portion of the dry cold exhaust gas that has flowed over the module surface is forced to overflow and be injected horizontally to both sides through the exhaust holes 33 on the side wall of the temperature measuring cover 3 into the isolation space of the external insulation cover 4.

[0061] Because the rubber sealing plug of the outlet hole 41 on the right side of the insulation cover 4 exerts a slight resistance to the gas outflow, the overflowing dry and cold exhaust gas quickly fills the entire isolation gap between the outer wall of the temperature measuring cover 3 and the inner wall of the insulation cover 4, displacing the originally residual humid air. This dynamically establishes a slightly positive pressure, dry, low-dew-point shielded microenvironment within the cavity of the insulation cover 4, with the internal static pressure slightly higher than the atmospheric pressure outside the insulation cover 4. Since this microenvironment contains no water vapor, the basis for icing and condensation is fundamentally eliminated, ensuring that the outer wall of the temperature measuring cover 3 remains completely dry during long-term low-temperature operation, thus completely eliminating the risk of water corrosion of the test plate. Finally, this portion of the process exhaust gas, carrying a trace amount of heat, slowly exits from the slit gap of the rubber sealing plug in the outlet hole 41, achieving automatic pressure balance in the dynamic fluid circuit within the system.

[0062] In this embodiment, the device showed no obvious icing on the outer surface of the temperature measuring cover 3 under a low temperature test environment of -40℃, the temperature control was stable, and the operation process was smooth, verifying the high airtightness and ease of operation of the present invention in a low temperature environment.

[0063] Example 3 In this embodiment, the diameter of the guide hole of the hand-tightening screw guide mechanism 2 is predetermined according to the specifications of the customized optical module screws, ensuring that screws of different specifications can be quickly aligned. The height of the test board fixing base 1 can be adjusted according to actual operating habits.

[0064] The other structures are the same as in Example 1.

[0065] As can be seen from the above embodiments, the present invention perfectly adapts to the customized optical module fixed by the bottom screw through the cooperation of the test board fixing base 1 and the hand-tightening screw guiding mechanism 2; through the combination structure of temperature measuring cover 3, heat insulation cover 4, threaded pressure tube 6 and exhaust hole, the risk of icing during low temperature testing is effectively reduced; the movement mode of the heat flow meter connector 5 assisted by the robotic arm greatly improves the convenience of the test operation.

[0066] The embodiments described above are only used to illustrate the technical solutions of the present invention, and are not intended to limit the present invention. Those skilled in the art can make various equivalent substitutions or improvements without departing from the spirit and scope of the present invention, and all such equivalent substitutions or improvements should be included within the protection scope of the present invention.

Claims

1. A high-sealing customized optical module three-temperature testing device, characterized in that, include: Test board mounting base, used to fix the test board and raise the test board; A hand-tightening screw guide mechanism is located above the test board to guide the tightening of the bottom fixing screws of the custom optical module; A temperature measuring cover, wherein a spring mechanism is provided inside the temperature measuring cover, the spring mechanism being used to press the temperature sensing cable onto the surface of the customized optical module; A heat insulation cover, which encloses the temperature measuring cover, is connected to the heat insulation cover via a threaded pressure tube and can move vertically relative to the heat insulation cover; and A heat flow meter connector, which is movably connected to the air inlet of the threaded pressure tube.

2. The high-sealing customized optical module three-temperature testing device according to claim 1, characterized in that, The temperature measuring cover is provided with an exhaust port, which is used to allow dry gas to enter the interior of the heat insulation cover.

3. The high-sealing customized optical module three-temperature testing device according to claim 1, characterized in that, The surface of the heat insulation cover is covered with heat insulation material.

4. The high-sealing customized optical module three-temperature testing device according to claim 1, characterized in that, The test board mounting base is provided with a limiting frame, which is used to position the customized optical module.

5. The high-sealing customized optical module three-temperature testing device according to claim 1, characterized in that, The heat flow meter connector is moved by a robotic arm to mate with or disconnect the threaded pressure tube inlet.

6. The high-sealing customized optical module three-temperature testing device according to claim 1, characterized in that, The threaded pressure tube is used to fix the position of the temperature measuring cover and, when lifted, moves the entire temperature measuring cover upward to reserve installation space.

7. The high-sealing customized optical module three-temperature testing device according to claim 2, characterized in that, The total opening area of ​​the exhaust port is less than 1 / 2 of the cross-sectional area of ​​the air inlet.

8. A method for testing three temperatures of a customized optical module, characterized in that, Including the following steps: S1. Remove the heat flow meter connector, open the insulation cover, unscrew the threaded pressure tube and pull the temperature measuring cover upward; S2. Place the customized optical module within the limiting frame of the test board fixing base, and tighten the bottom fixing screws using the hand-tightening screw guide mechanism; S3. Press down the temperature measuring cover so that the spring mechanism inside the temperature measuring cover presses the temperature sensing cable onto the surface of the customized optical module, and tighten the threaded pressure tube to fix the temperature measuring cover. S4. Connect the movable heat flow meter connector to the threaded pressure tube inlet and fix it in place; S5. Introduce dry gas at a specified temperature into the temperature measuring hood and conduct low temperature, normal temperature, and high temperature tests in sequence. S6. After the test is completed, lift the temperature measuring cover, loosen the screws, and take out the customized optical module.

9. The method for testing the three temperatures of a customized optical module according to claim 8, characterized in that, In step S5, the dry gas enters the interior of the insulation cover through the exhaust port on the temperature measuring cover.

10. The three-temperature testing method for customized optical modules according to claim 8, characterized in that, The front door of the insulation cover can be opened, and the test board fixing base raises the test board so that the operator can tighten the bottom screws.

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