Batch screening test fixture for core circuit boards for spaceflight
By designing a batch screening test fixture for core circuit boards used in aerospace applications, using aluminum 6061 material and a sophisticated structure, simultaneous temperature screening of 16 circuit boards was achieved. This solved the problem of low efficiency in traditional methods, improved testing efficiency and uniformity, and is suitable for large-scale production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ZHONGCHEN XINWEI AEROSPACE TECHNOLOGY CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional temperature screening methods for aerospace core circuit boards are inefficient and cannot meet the needs of large-scale production. They also have shortcomings in temperature uniformity and test data synchronization, making it difficult to achieve efficient screening of batches of circuit boards.
A batch screening and testing fixture for core circuit boards used in aerospace was designed. The upper and lower shells are made of aluminum 6061 material, with recessed slots and support limiting protrusions inside. It is connected to the pin header through DB25 connectors and combined with vacuum extraction holes and dispensing holes to achieve simultaneous testing of 16 circuit boards.
It improves testing efficiency, enabling the simultaneous installation and testing of 16 circuit boards, ensuring temperature uniformity and airtightness, simplifying the operation process, making it suitable for large-scale production environments, and quickly screening out problematic circuit boards.
Smart Images
Figure CN224203258U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aerospace electronic equipment testing technology, and in particular to a batch screening test fixture for core circuit boards used in aerospace. Background Technology
[0002] The core circuit boards used in aerospace will be subjected to extreme temperature environments (such as -150°C to +150°C) during launch and operation, so they must undergo rigorous temperature screening tests to ensure their reliability.
[0003] Traditional temperature screening methods are typically performed on individual circuit boards, resulting in low efficiency and failing to meet the demands of large-scale aerospace production missions. Furthermore, traditional methods have shortcomings in areas such as temperature uniformity and test data synchronization, making it difficult to achieve efficient screening of batches of circuit boards.
[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content
[0005] The purpose of this invention is to provide a batch screening test fixture for core circuit boards used in aerospace. This test fixture greatly improves testing efficiency and has great potential for widespread application.
[0006] This utility model provides a batch screening and testing fixture for core circuit boards used in aerospace, including an upper shell and a lower shell, with the upper shell covering the lower shell. The bottom surfaces of both the upper and lower shells have eight recessed slots, with supporting and limiting protrusions near the bottom edges of each slot. Each recessed slot has three positioning holes at its edge. A through-hole vacuum extraction port and a pin header routing hole are provided at one end of the bottom surface of both the upper and lower shells. DB25 connection holes communicating with the pin header routing holes are provided on the sides of both the upper and lower shells. Screw holes are provided on both sides of the DB25 connection holes, and a dispensing hole is provided at the outer edge of the pin header routing holes.
[0007] Using the above technical solution, the test fixture usage process is as follows: S1: The tester first places the 16 test circuit boards on the support limiting protrusions on the upper and lower housings respectively, adjusts the position so that the back of the circuit board faces the upper and lower recessed slots, and fixes the circuit board with screws through the three positioning holes; S2: Connect the DB25 connector to the pin header with a flying wire, pass the pin header through the DB25 connection hole to the pin header routing hole, and fix the DB25 screws in the screw holes on both sides of the DB25 connection hole; S3: Apply glue to the glue hole at the outer edge of the pin header routing hole to seal it, and fix the pin header so that the pin header is exposed on the pin header routing hole; S4: Connect the fixed circuit board to the pin header through wires; S5: Close the upper and lower housings and connect them with screws; S6: Perform vacuuming at the vacuum extraction port.
[0008] Furthermore, an upper rectangular groove and a lower rectangular groove are respectively provided at both ends of the inner bottom surface of the upper shell and the lower shell.
[0009] Furthermore, a sealing groove is provided at the edge of the lower housing, and a sealing ring is provided in the sealing groove.
[0010] Furthermore, the eight recessed slots on the inner bottom surface of the upper shell and the lower shell are located on both sides of the bottom surface, and four recessed slots are evenly spaced from top to bottom on each side of the bottom surface.
[0011] Furthermore, both the upper housing and the lower housing are made of aluminum 6061 material.
[0012] This utility model discloses a batch screening and testing fixture for core circuit boards used in aerospace applications. Its ingenious design allows for convenient installation of up to 16 circuit boards at once, with unified output via a DB25 port connected by cable. Rectangular dispensing holes ensure airtightness, and evacuation further simulates the vacuum environment of space. The upper and lower shells are made of aluminum 6061, a material with relatively low density, resulting in a lightweight circuit board testing fixture. Furthermore, the good uniformity of aluminum 6061 ensures consistent thermophysical properties throughout the fixture during heating and cooling, leading to a more uniform temperature distribution and ensuring optimal performance during internal testing. Consistent Environment: This utility model, through ingenious structural design and optimization, rationally arranges the test space, ensures the test environment, greatly improves test efficiency, and has great applicability; Batch Operation: By centralizing the wire harness through DB25 numbering and output, it is easy to quickly screen out which circuit board is faulty; Temperature cycle testing of 16 circuit boards at one time greatly improves efficiency; Simple Operation: The structure is simple and easy to operate, suitable for large-scale production environments; Suitable Material: Made of aluminum 6061, it is lightweight, easy to operate, and has good temperature uniformity, ensuring consistent temperature changes inside the fixture during variable temperature experiments. Attached Figure Description
[0013] Figure 1 A schematic diagram of the structure of the aerospace core circuit board batch screening test fixture provided in this embodiment of the utility model.
[0014] Figure 2 for Figure 1 Another structural schematic diagram of the core circuit board batch screening test fixture used by China Aerospace.
[0015] Figure 3 for Figure 1 A schematic diagram of the lower housing of the core circuit board batch screening test fixture used by China Aerospace.
[0016] Figure 4 for Figure 1 A plan view of the upper housing of the core circuit board batch screening test fixture used by China Aerospace.
[0017] The reference numerals and components involved in the accompanying drawings are shown below:
[0018] 1. Upper shell 2. Lower shell 3. Recessed slot
[0019] 4. Support limiting protrusion; 5. Positioning hole; 6. Vacuum extraction hole.
[0020] 7. Pin header routing hole; 8. DB25 connector hole; 9. Screw hole.
[0021] 10. Dispensing hole; 11. Upper rectangular groove; 12. Lower rectangular groove
[0022] 13. Sealing groove Detailed Implementation
[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0024] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0025] Example 1
[0026] Figure 1 This is a schematic diagram of the structure of the aerospace core circuit board batch screening and testing fixture provided in an embodiment of this utility model. Figure 2 for Figure 1 Another structural diagram of the core circuit board batch screening test fixture used by China Aerospace Science and Technology Corporation. Figure 3 for Figure 1A schematic diagram of the lower housing of the core circuit board batch screening and testing fixture used by China Aerospace Science and Technology Corporation. Figure 4 for Figure 1 A plan view of the upper housing of the batch screening and testing fixture for core circuit boards used in China Aerospace. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 The aerospace core circuit board batch screening and testing fixture provided in this embodiment includes an upper housing 1 and a lower housing 2, with the upper housing 1 covering the lower housing 2. The bottom surfaces of both the upper housing 1 and the lower housing 2 are provided with eight recessed slots 3, and support and limiting protrusions 4 are provided near the bottom edge of each recessed slot 3. Each recessed slot 3 has three positioning holes 5 at its edge. A through vacuum extraction hole 6 and a pin routing hole 7 are provided at one end of the bottom surface of both the upper housing 1 and the lower housing 2. DB25 connection holes 8 communicating with the pin routing holes 7 are provided on the sides of both the upper housing 1 and the lower housing 2. Screw holes 9 are provided on both sides of the DB25 connection holes 8, and dispensing holes 10 are provided at the outer edge of the pin routing holes 7.
[0027] The application process of this aerospace core circuit board batch screening and testing fixture:
[0028] S1: The tester must first place the 16 test circuit boards on the support limiting protrusions 4 on the upper housing 1 and the lower housing 2 respectively, adjust the position so that the back of the circuit board faces the upper and lower recessed slots 3, and fix the circuit board with screws through the three positioning holes 5.
[0029] S2: Connect the DB25 connector to the pin header with a flying wire, pass the pin header through the DB25 connection hole 8 to the pin header routing hole 7, and fix the DB25 screw in the screw holes 9 on both sides of the DB25 connection hole 8.
[0030] S3: Apply adhesive to the glue hole 10 at the outer edge of the pin routing hole 7 to seal it, and fix the pins so that the pins are exposed on the pin routing hole 7.
[0031] S4: Connect the fixed circuit board to the pin header using wires;
[0032] S5: Close the upper housing 1 and the lower housing 2 together and connect them with screws;
[0033] S6: Perform vacuuming at vacuum extraction port 6.
[0034] It should be noted that step S2 above is a one-time operation, meaning that once it is performed, it does not need to be performed again.
[0035] This utility model relates to a mass screening and testing fixture for core circuit boards used in aerospace. The fixture has an ingenious structural design, which allows staff to easily install 16 circuit boards at once and output them uniformly from the DB25 port via cable connection. The rectangular dispensing hole 10 ensures airtightness, and after evacuation, it can better simulate the vacuum environment of space.
[0036] This utility model, through its ingenious structural design and optimization, rationally arranges the testing space, ensures the testing environment, greatly improves testing efficiency, and has great potential for widespread application.
[0037] This invention uses DB25 numbered centralized wiring harnesses and centralized outputs to facilitate quick screening of which circuit board is malfunctioning; it can perform temperature cycle tests on 16 circuit boards at once, greatly improving efficiency; it has a simple structure, is easy to operate, and is suitable for large-scale production environments; it uses 6061 aluminum, which is lightweight, easy to operate, and has good temperature uniformity, ensuring consistent temperature changes inside the fixture during variable temperature experiments.
[0038] Furthermore, the present invention provides an upper rectangular groove 11 and a lower rectangular groove 12 at both ends of the bottom surface inside the upper shell 1 and the lower shell 2, respectively.
[0039] It should be noted that the design of the upper rectangular groove 11 and the lower rectangular groove 12 is for weight reduction and material saving, and to accommodate the structure of the corresponding position of the other half of the shell.
[0040] Furthermore, a sealing groove 13 is provided at the edge of the lower housing 2, and a sealing ring is provided in the sealing groove 13. This improves the sealing performance inside the test fixture.
[0041] Furthermore, the eight recessed slots 3 on the bottom surface of the upper shell 1 and the lower shell 2 of this utility model are respectively located on both sides of the bottom surface, and four recessed slots 3 are evenly spaced from top to bottom on each side of the bottom surface.
[0042] Furthermore, both the upper shell 1 and the lower shell 2 of this utility model are made of aluminum 6061 material.
[0043] It should be noted that the upper housing 1 and the lower housing 2 are made of aluminum 6061 material, which has a relatively low density, making the circuit board test fixture lighter. At the same time, aluminum 6061 material has good uniformity, and the thermophysical properties of each part are relatively consistent during heating or heat dissipation, which can make the temperature distribution of the fixture relatively uniform and ensure a consistent internal testing environment.
[0044] As can be seen from the above description, the advantages of this utility model are:
[0045] This utility model discloses a batch screening and testing fixture for core circuit boards used in aerospace applications. Its ingenious design allows for convenient installation of up to 16 circuit boards at once, with unified output via a DB25 port connected by cable. Rectangular dispensing holes ensure airtightness, and evacuation further simulates the vacuum environment of space. The upper and lower shells are made of aluminum 6061, a material with relatively low density, resulting in a lightweight circuit board testing fixture. Furthermore, the good uniformity of aluminum 6061 ensures consistent thermophysical properties throughout the fixture during heating and cooling, leading to a more uniform temperature distribution and ensuring optimal performance during internal testing. Consistent Environment: This utility model, through ingenious structural design and optimization, rationally arranges the test space, ensures the test environment, greatly improves test efficiency, and has great applicability; Batch Operation: By centralizing the wire harness through DB25 numbering and output, it is easy to quickly screen out which circuit board is faulty; Temperature cycle testing of 16 circuit boards at one time greatly improves efficiency; Simple Operation: The structure is simple and easy to operate, suitable for large-scale production environments; Suitable Material: Made of aluminum 6061, it is lightweight, easy to operate, and has good temperature uniformity, ensuring consistent temperature changes inside the fixture during variable temperature experiments.
[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A batch screening and testing fixture for core circuit boards used in aerospace, characterized in that, It includes an upper shell (1) and a lower shell (2), wherein the upper shell (1) covers the lower shell (2); The bottom surface inside the upper shell (1) and the lower shell (2) is provided with eight recessed slots (3). Support limiting protrusions (4) are provided on the recessed slots (3) near the bottom edge. Each recessed slot (3) is provided with three positioning holes (5). Both the upper housing (1) and the lower housing (2) have through vacuum extraction holes (6) and pin routing holes (7) at one end of the inner bottom surface; DB25 connection holes (8) communicating with the pin header wiring hole (7) are provided on the side of the upper housing (1) and the lower housing (2). Screw holes (9) are provided on both sides of the DB25 connection hole (8). A dispensing hole (10) is provided at the outer edge of the pin header wiring hole (7).
2. The aerospace core circuit board batch screening and testing fixture according to claim 1, characterized in that, An upper rectangular groove (11) and a lower rectangular groove (12) are respectively provided at both ends of the bottom surface inside the upper shell (1) and the lower shell (2).
3. The aerospace core circuit board batch screening and testing fixture according to claim 1, characterized in that, A sealing groove (13) is provided at the edge of the lower housing (2), and a sealing ring is provided in the sealing groove (13).
4. The aerospace core circuit board batch screening and testing fixture according to claim 1, characterized in that, The eight recessed slots (3) on the bottom surface inside the upper shell (1) and the lower shell (2) are located on both sides of the bottom surface, and four recessed slots (3) are evenly spaced from top to bottom on each side of the bottom surface.
5. The aerospace core circuit board batch screening and testing fixture according to claim 1, characterized in that, Both the upper shell (1) and the lower shell (2) are made of aluminum 6061 material.