Calibration test fixing device for atmosphere data computer

Abstract

The utility model discloses a calibration test fixing device for an atmosphere data computer, which is characterized in that two sides of an upper cover plate and a lower cover plate are respectively supported by a right side plate and a left side plate to form a frame structure, at least three groups of slots are symmetrically arranged on opposite surfaces of the right side plate and the left side plate, the slots are horizontally arranged, and one end of each slot is provided with an opening for inserting a support plate; one end of each slot is open, the other end of each slot is sealed, a supporting plate is selectively inserted into each pair of slots, the supporting plates are used for placing an atmosphere data computer, and the atmosphere data computer is connected with external equipment through a test cable. The device can effectively and absolutely safely lock equipment, has enough bearing and protecting capabilities, is matched with a guide rail structure, locks a hardware plate, stably locks the equipment in a test fixing device, supports multi-equipment access test calibration, greatly saves equipment calibration test cost, reduces calibration time, and improves test efficiency. And the space utilization in the testing process can be increased.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric data computer fixing technology in aviation, and particularly to the field of calibration, testing and fixing technology for atmospheric data computers. Background Technology

[0002] The air data computer in an avionics system is a crucial component of an aircraft, providing stable and effective atmospheric data, including altitude and airspeed. Stable data output from the air data computer requires factory calibration. Currently, conventional air data computers operate independently. For example, the patent document CN217135849U, published on August 5, 2022, entitled "A General-Purpose Testing Device for Air Data Computers," discloses a device comprising a device body and a control panel mounted on the device body. An outer cover is located on the outer side of the device body near the control panel. A baffle is rotatably mounted on the outer cover. A receiving box is located on the inner surface of the baffle. A cover is slidably mounted on the receiving box. A through hole is formed on the surface of the cover. A latching assembly acting on the baffle is provided between the outer cover and the baffle.

[0003] The calibration efficiency of a single atmospheric data computer is low and it occupies calibration equipment. Therefore, it is necessary to design a calibration test fixture that can stably and efficiently test multiple atmospheric data computer devices, improve the efficiency of calibration equipment, and reduce test time and workload. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to achieve a simple and efficient guide rail fixing design to ensure the stable installation of the atmospheric data computer and the calibration and testing of multiple devices.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a calibration and testing fixing device for an atmospheric data computer, wherein the upper cover plate and the lower cover plate are respectively supported by a right side plate and a left side plate to form a frame structure, and the right side plate and the left side plate are symmetrically provided with at least 3 sets of slots facing each other. The slots are horizontally arranged with one end open for inserting a support plate and the other end sealed. Each pair of slots is selectively inserted with a support plate. The support plate is used to place the atmospheric data computer, and the atmospheric data computer is connected to external devices through a test cable.

[0006] Both sides of the support plate are provided with strip-shaped guide rail bodies, which are inserted into slots with a clearance fit between the slots and the guide rail bodies.

[0007] The bottom of the guide rail body has an arc-shaped cross-section for the strip structure, which is supported within the slot.

[0008] Each slot has a locking hole above it, and the outer end of the guide rail body has an upwardly extending locking plate. The locking plate has a fixing ring corresponding to the position of the locking hole, and the fixing ring and the locking hole are locked together by screws.

[0009] A spring-loaded locking washer and a flat washer are provided between the screw and the locking plate.

[0010] The frame structure has an open front and an open back, with the slot opening at the front and the other end at the back. The test cables are all connected to the atmospheric data computer from the back of the frame structure.

[0011] The upper cover plate, lower cover plate, right side plate, and left side plate are connected and fixed by screws. The slot has 6-10 layers and is equally spaced. The depth of the support plate is the same as the length of the slot. The upper surface of the slot is provided with mounting holes for fixing the atmospheric data computer.

[0012] This invention can effectively and absolutely safely lock the equipment, and has sufficient load-bearing and protection capabilities. It is also equipped with a guide rail structure to lock the hardware plate and stably lock the equipment in the test fixture. It supports multiple devices to be connected for test calibration, which greatly saves equipment calibration test costs, reduces calibration time, and increases space utilization during the test process. Attached Figure Description

[0013] The following is a brief explanation of the content and markings in each of the accompanying drawings in this utility model specification:

[0014] Figure 1 A schematic diagram of the calibration test fixture structure;

[0015] Figure 2 A schematic diagram of the slide rail structure for the calibration test fixture;

[0016] Figure 3 A schematic diagram of the overall structure of the fixing device in the calibration test fixing device;

[0017] Figure 4 A schematic diagram of the mounting of the atmospheric data computer in the calibration test fixture;

[0018] The markings in the above figures are as follows: 1. Screw; 2. Top cover plate; 3. Right side plate; 4. Bottom cover plate; 5. Left side plate; 6. Screw; 7. Spring locking washer; 8. Flat washer; 9. Retaining ring; 10. Guide rail body. Detailed Implementation

[0019] The following description, with reference to the accompanying drawings, details the specific implementation of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods. This will help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model.

[0020] The calibration and testing fixture for an atmospheric data computer mainly includes an upper cover plate 2, a lower cover plate 4, a left side eight-rail groove side plate, a right side eight-rail groove side plate, and a slide rail structure. Precision shoulder hexagon socket screws 6 are installed on the slide rail structure. The hexagon socket screws 6 pass through locking washers and flat washers 8, and are fixed to the slide rail structure by a retaining ring 9. The left and right slide rail structures use screws 1 to fix the printed circuit board of the atmospheric data computer. Some screw holes 1 are reserved on the slide rail structure for subsequent expansion of related equipment structures. The upper cover plate 2 is connected to the left and right side eight-rail groove side plates using flat-head screws 1, three on each side. The lower cover plate 4 is fixed in the same way. The assembly is simple and effective, firmly locking the sides without deformation.

[0021] The upper cover plate 2 and lower cover plate 4 of the fixing device are supported on both sides by the right side plate 3 and the left side plate 5, respectively, forming a frame structure. The upper cover plate 2 and lower cover plate 4 are connected to the right side plate 3 and the left side plate 5 by screws 1, forming a stable and effective three-dimensional structure. The front and back of the frame structure are open structures, with the open end of the slot being the front of the frame structure and the other end being the back of the frame structure. All test cables are connected to the atmospheric data computer from the back of the frame structure. The three-dimensional structure has no obstructions at the front and back and adopts a fully hollow design, which facilitates the connection of internal equipment cables and maximizes space utilization.

[0022] The right side plate 3 and the left side plate 5 are symmetrically provided with at least three sets of slots. The number of slot layers is preferably 6-10, and they are evenly spaced. The slots are horizontally positioned with one end open for inserting a support plate and the other end sealed. The slots can perfectly match the slide rail structure. A baffle of the same width is designed behind the groove to support the slide rail structure and prevent excessive displacement. The side of the groove has six threaded holes for hexagonal socket screws, which match the hexagonal sockets of the slide rail structure, locking the entire device in the fixing device. The fixing device uses eight slide rail grooves, allowing multiple slide rail structure devices to be connected simultaneously, resulting in higher efficiency. Furthermore, the distance between devices can be adjusted according to the number of devices, providing greater flexibility.

[0023] Each pair of slots selectively inserts a support plate. The specific number of slots can be determined based on the number of air data computers to be installed, but the number of air data computers cannot exceed the number of slot layers. The support plate is used to place the air data computers, and the upper surface of the slot is provided with mounting holes for fixing the air data computers. The mounting holes correspond to the fixing holes on the bottom of the air data computers, which facilitates fixing the air data computers to the support plate and ensures the reliability of the packaging installation.

[0024] The fixed device slide rail groove adopts a double long hole hollow structure between the grooves, and the middle of the two holes serves as a support column, which can improve the stability of the device and ensure sufficient support. The opening design is conducive to heat dissipation and ventilation, so that the temperature sensing of the equipment is not affected during the temperature-related calibration process, thus improving the real-time performance and effectiveness of the calibration data.

[0025] like Figure 2 As shown, the slide rail structure mainly includes: screws 6, washers, flat washers 8, retaining rings 9, and the guide rail body 10. Screws 6 are hexagon socket screws 6, and washers are standard spring-locking washers 7. The slide rail structure is a long track with a gradient arc design at the bottom to soften sharp edges, reduce impact and collision, and lower local stress. The three-sided contact guide structure enhances resistance to off-center loads. An hexagon socket screw 6 retaining block extends from the slide rail. The retaining block has precision-drilled holes, through which the hexagon socket screw 6 passes, passing through the standard spring-locking washers 7 and flat washers 8, and then through the retaining block. The retaining ring 9 secures the hexagon socket screw 6 to the retaining block. Later, in the fixing device, the hexagon socket screw 6 can be used to lock the atmospheric data computer within the device, preventing displacement. The retaining block and slide rail are integrally molded, eliminating the possibility of damage. A side baffle extends rearward from the retaining block, with a circular hollow design for effective heat dissipation and ventilation. On the other side of the baffle, there are three fixing blocks with threaded holes. The bottom of the fixing blocks is designed with a groove, and the printed circuit board of the atmospheric data computer can be locked to the slide rail structure with screw 1 and fixing blocks inside the groove.

[0026] The slide rail structure is pushed into the fixing device through the groove and locked in place by a hexagonal socket screw. The left and right slide rail structures fix the atmospheric data computer in place and simultaneously lock it within the fixing device structure, forming a unified whole. This ensures stability, reliability, and effective resistance to vibrations that may occur during testing. Multiple atmospheric data computers can be arranged in a test array within the fixing device using the slide rail structure, allowing for simultaneous completion of all calibration tests.

[0027] like Figure 4As shown, this is used in actual temperature and atmospheric calibration processes. Multiple atmospheric data computers are locked inside the mounting device, with related cables led out from the rear of the device. The device is then placed inside the temperature chamber. Due to its simple and compact design, it is suitable for temperature chamber equipment in small spaces. Simultaneously, its three-dimensional structural design allows multiple mounting devices to be placed simultaneously in large temperature chamber equipment, resulting in high space utilization and significantly improved calibration efficiency. Benefiting from its large-area hollow design, the device achieves lightweight and high strength, while ensuring uniform temperature sensing within the chamber and preventing heat accumulation, thus ensuring safety and reliability. The mounting device has no obstructions at the front or back, and its three-dimensional hollow design allows for flexible connection of the atmospheric data computer cables, facilitating management and status monitoring.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A calibration test fixture for an air data computer, comprising: The two sides of the upper cover plate and the lower cover plate are respectively supported by the right side plate and the left side plate to form a frame structure. At least three groups of slots are symmetrically arranged on the opposite faces of the right side plate and the left side plate. The slots are horizontally arranged and one end is open for inserting the support plate, and the other end is sealed. Each pair of the slots selectively inserts a support plate, and the support plate is used to place the air data computer, and the air data computer is connected to external devices through test cables.

2. The calibration test fixture for an air data computer of claim 1, wherein: Strip-shaped guide rail bodies are arranged on both sides of the support plate, and the guide rail bodies are inserted into the slots, and the slots and the guide rail bodies are in clearance fit.

3. The calibration test fixture for an air data computer of claim 2, wherein: The cross-section of the bar-shaped structure at the bottom of the guide rail body is arc-shaped, and this structure is supported in the slot.

4. The calibration test fixture for an air data computer of claim 3, wherein: A lock hole is arranged above each slot, an upward-extending lock plate is arranged at the outer end of the guide rail body, and a fixing ring corresponding to the position of the lock hole is arranged on the lock plate, and the fixing ring and the lock hole are locked by screws.

5. The calibration test fixture for an air data computer of claim 4, wherein: A spring lock washer and a flat washer are arranged between the screw and the lock plate.

6. A calibration test fixture for an air data computer according to any one of claims 1-5, characterized in that: The front and back surfaces of the frame structure are both open structures. The open end of the slot is the front surface of the frame structure, and the other end is the back surface of the frame structure. The test cables are all connected to the air data computer from the back surface of the frame structure.

7. The calibration test fixture for an air data computer of claim 6, wherein: The upper cover plate, the lower cover plate are connected and fixed to the right side plate and the left side plate by screws. The slots are provided with 6-10 layers and are arranged at equal intervals. The depth of the support plate is the same as the length of the slot, and mounting holes for fixing the air data computer are arranged on the upper surface of the slot.

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