High-precision test sensor fixing device

Abstract

The utility model relates to the field of acceleration sensors, in particular to a high-precision test sensor fixing device. Comprising a bottom plate and two groups of supporting vertical plates which serve as a rack and are fixed into a whole through screws I, bushings connected to the supporting vertical plates through screws III, an adapter flange and a rotating shaft which are arranged in the bushings, and a sensor mounting plate which is arranged between the two groups of supporting vertical plates and is used for mounting an acceleration sensor, according to the utility model, the problem that the acceleration sensor needs to be repeatedly and manually assembled and disassembled in the test process so as to meet different angle test requirements can be solved; and meanwhile, the problem of test data distortion caused by low mounting precision is also avoided, the reliability and stability of the device can be ensured by high-precision shaft hole matching, and the levelness requirement of the device can be intuitively controlled by matching a leveling structure with an embedded horizontal measuring instrument.

Description

Technical Field

[0001] The utility model relates to the field of acceleration sensors, in particular to a high-precision test sensor fixing device. Background Art

[0002] The existing test fixture is a simple single-direction support frame. After each test in one direction, the test operator needs to disassemble and assemble the sensor for a second time, or rotate the fixture to perform test operations in other directions. Whether it is horizontal or not is determined by the test operator based on experience. The entire test process is complicated, and it is impossible to ensure that the fixture is level with the ground. The acceleration sensor is divided into a normal acceleration sensor and a lateral acceleration sensor. Both are four-redundant configurations, which are used to measure the normal acceleration and lateral acceleration of the aircraft movement, and generate a DC voltage signal proportional to the linear acceleration. The fixed sensor has high test accuracy and requires testing in three directions. The three directions include: horizontal upward positive normal, horizontal downward reverse normal, and vertical outward lateral. The device can be assembled once and then adjusted at multiple angles, so the sensor is required to ensure the horizontality of its installation position during the test. Currently, there is no such fixture on the market. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a high-precision test sensor fixing device.

[0004] A high-precision test sensor fixing device includes a base plate and two groups of supporting vertical plates fixed as a whole by screws, a bushing connected to the supporting vertical plates by screws, a switching flange and a rotating shaft arranged in the bushing, a sensor mounting plate arranged between the two groups of supporting vertical plates for mounting an acceleration sensor, a level ruler mounting plate arranged on the sensor mounting plate, and a level measuring instrument arranged on the level ruler mounting plate.

[0005] The beneficial effects of the utility model are:

[0006] The utility model performs a simulation test of the normal acceleration and lateral acceleration of the acceleration sensor in the motion process, generates a DC voltage signal proportional to the linear acceleration, causes the acceleration sensor to produce an acceleration change between -1g and +1g, and transmits the change value to a computer for calculation of flight control laws. The utility model can solve the problem that the acceleration sensor needs to be repeatedly manually disassembled and assembled during the test process to meet different angle test requirements, while also avoiding the problem of test data distortion caused by low installation accuracy. The high-precision shaft-hole matching can ensure the reliability and stability of the device, and the leveling structure combined with the built-in level measuring instrument can intuitively control the horizontality requirement of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0008] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0009] Figure 2 The top view of the structure of the utility model is shown in FIG. Figure 1 ;

[0010] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0011] Figure 4 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 5 The top view of the structure of the utility model is shown in FIG. Figure 2 ;

[0013] Figure 6 It is a side view structural schematic diagram of the utility model;

[0014] Figure 7 This is a schematic diagram of the main structure of the rotating shaft of the utility model;

[0015] Figure 8 For the utility model Figure 7 A-direction structural schematic diagram;

[0016] Fig. 9 This is a schematic diagram of the main structure of the bottom plate of the utility model;

[0017] Fig.10 The supporting plate structure of the utility model is shown in FIG. Figure 1 ;

[0018] Fig.11 The supporting plate structure of the utility model is shown in FIG. Figure 2 ;

[0019] Fig.12 This is a side view structural diagram of the support vertical plate of the utility model;

[0020] Fig.13 This is a schematic diagram of the structure of the positive normal simulation test station of the utility model;

[0021] Fig.14 This is a schematic diagram of the structure of the lateral simulation test station of the utility model;

[0022] Fig.15 This is a schematic diagram of the structure of the anti-normal simulation test station of the utility model;

[0023] Fig.16 It is a schematic diagram of the positive normal structure of the acceleration sensor of the utility model;

[0024] Fig.17 It is a schematic diagram of the anti-normal structure of the acceleration sensor of the utility model;

[0025] Fig.18 It is a schematic diagram of the lateral structure of the acceleration sensor of the utility model;

[0026] Figure numerals: 1. Base plate; 2. Support plate; 3. Rotating shaft; 4. Large nut; 5. Gasket; 6. Adapter flange; 7. Locating pin; 8. Bushing; 9. Level ruler mounting plate; 10. Sensor mounting plate; 11. Leveling foot; 12. Nut; 13. Screw one; 14. Screw two; 15. Screw three; 16. Screw four; 17. Screw five; 18. Screw six; 19. Screw seven; 20. Screw eight; 21. Level measuring instrument; 22. Acceleration sensor; 23. Locating hole on the support plate; 24. Locating hole under the support plate; 25. Locating hole on the adapter flange; 26. Locating hole under the adapter flange. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0028] like Figures 1 to 18 As shown, a high-precision test sensor fixing device includes a base plate 1 and two groups of supporting upright plates 2 fixed as a whole by screws 13 as a frame, a bushing 8 connected to the supporting upright plates 2 by screws 15, an adapter flange 6 and a rotating shaft 3 arranged in the bushing 8, a sensor mounting plate 10 arranged between the two groups of supporting upright plates 2 for mounting an acceleration sensor 22, a level ruler mounting plate 9 arranged on the sensor mounting plate 10, and a level measuring instrument 21 arranged on the level ruler mounting plate 9.

[0029] The base plate 1 is provided with nuts 12 and several groups of leveling feet 11. The horizontal height adjustment between the device and the ground is achieved by installing four nuts 12 at the bottom, and the horizontality is monitored by a level measuring instrument 21 installed on each test surface. In order to meet the requirement of completing the test in three directions in one installation, angle control is achieved through a simple and easy-to-implement pin structure. The test operator can manually rotate the acceleration sensor 22 to achieve different angle controls through the positioning pin 7.

[0030] The matching clearance between the bushing 8 and the rotating shaft 3 during production and processing is within 0.01 mm.

[0031] The adapter flange 6 is fastened to the rotating shaft 3 as a whole and rotatably cooperates with the bushing 8. The support vertical plate 2 and the base plate 1 are fastened together by screws 13. The bushing 8 is fastened to the support vertical plate 2 by screws 14. The adapter flange 6 is fixed to the rotating shaft 3 by screws 15 and passes through the inner wall of the bushing 8, and is locked by a large nut 4. The shoulder of the rotating shaft 3 is close to the end face of the bushing 8 to achieve axial positioning.

[0032] The adapter flange 6 is provided with a large nut 4 and a gasket 5 which penetrate through the inner wall of the bushing 8 and are convenient for locking.

[0033] The supporting upright plate 2 is provided with positioning pins 7 for fixing the adapter flange 6 .

[0034] The support plate 2 is provided with an upper support plate positioning hole 23 and a lower support plate positioning hole 24 .

[0035] The adapter flange 6 is provided with an adapter flange upper positioning hole 25 and an adapter flange lower positioning hole 26 .

[0036] like Figure 10 to Figure 13 As shown, in the normal simulation test station, the acceleration sensor 22 is installed horizontally upward, and the positioning pin 7 fixes the adapter flange 6 to the supporting plate 2. The fixing method is that the positioning pin 7 directly penetrates the positioning hole 23 on the supporting plate of the supporting plate 2 and the positioning hole 25 on the adapter flange of the adapter flange 6 to ensure that the two positioning holes are coaxial. The horizontality of the entire tooling is adjusted by adjusting the nut 12, and whether it is horizontal or not depends on the level measuring instrument 21.

[0037] The structure of the rotating shaft 3 is stepped, the large end is used as a shoulder to fit tightly against the bushing 8 to prevent the rotating shaft 3 from axial movement, and the small end is tapped to fix the large nut 4.

[0038] like Figure 10 to Figure 12 , Fig.14 As shown, at the lateral simulation test station, the acceleration sensor 22 is installed vertically outward, and the positioning pin 7 fixes the adapter flange 6 to the supporting plate 2. The fixing method is that the positioning pin 7 directly penetrates the positioning hole 23 on the supporting plate of the supporting plate 2 and the positioning hole 26 under the adapter flange of the adapter flange 6 to ensure that the two positioning holes are coaxial. The horizontality of the entire tooling is adjusted by adjusting the nut 12, and whether it is horizontal or not depends on the level measuring instrument 21.

[0039] The adapter flange 6 is connected to the sensor mounting plate 10 via screws 14 16 .

[0040] The rotating shaft 3 is connected to the sensor mounting plate 10 via screws 5 17 .

[0041] The sensor mounting plate 10 is connected to the level ruler mounting plate 9 via six screws 18.

[0042] The axial positioning of the rotating shaft 3 is tightened by the fastening nut at the shaft end. While ensuring the free rotation of the rotating shaft 3, the locking screw 7 19 prevents the nut 12 from loosening during use.

[0043] like Figure 10 to Figure 12 , Fig.15 As shown, at the reverse normal simulation test station, the acceleration sensor 22 is flipped 180 degrees on the basis of being horizontally upward, and the locating pin 7 fixes the adapter flange 6 to the supporting vertical plate 2. The fixing method is that the locating pin 7 directly penetrates the locating hole 24 under the supporting vertical plate and the locating hole 25 on the adapter flange of the adapter flange 6 to ensure that the two locating holes are coaxial. The horizontality of the entire tooling is adjusted by adjusting the nut 12, and whether it is horizontal or not depends on the level measuring instrument 21.

[0044] The design concept and the overall structure of the tooling used to simultaneously measure normal acceleration and lateral acceleration, and simulate the acceleration changes in two directions during the actual operation of the aircraft, successfully solve the problem of the acceleration sensor 22 needing to be repeatedly disassembled and assembled manually during the test process to meet the requirements of different angle tests, while also avoiding distortion of test data caused by low installation accuracy.

[0045] The leveling method is: place the device at the test site, connect all cables, loosen the upper nuts 12 of all leveling feet 11, refer to the display of the level measuring instrument 21, adjust the nuts 12 under the leveling feet 11 until the level measuring instrument 21 displays horizontal, tighten all nuts 12 on the leveling feet 11 to keep the device level.

[0046] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision test sensor fixing device, characterized in that: The invention comprises a bottom plate (1) and two groups of supporting upright plates (2) fixed as a whole by screws (13) as a frame, a bushing (8) connected to the supporting upright plates (2) by screws (15), a transfer flange (6) and a rotating shaft (3) arranged in the bushing (8), a sensor mounting plate (10) arranged between the two groups of supporting upright plates (2) for mounting an acceleration sensor (22), a level ruler mounting plate (9) arranged on the sensor mounting plate (10), and a level measuring instrument (21) arranged on the level ruler mounting plate (9).

2. A high-precision test sensor fixing device according to claim 1, characterized in that: The base plate (1) is provided with nuts (12) and a plurality of groups of leveling feet (11).

3. A high-precision test sensor fixing device according to claim 1, characterized in that: The matching clearance between the bushing (8) and the rotating shaft (3) is within 0.01 mm during production and processing.

4. A high-precision test sensor fixing device according to claim 1, characterized in that: The adapter flange (6) is integrally fastened to the rotating shaft (3) and is rotatably matched with the bushing (8).

5. A high-precision test sensor fixing device according to claim 1, characterized in that: The adapter flange (6) is provided with a large nut (4) and a gasket (5) which penetrate through the inner wall of the bushing (8) and are convenient for locking.

6. A high-precision test sensor fixing device according to claim 1, characterized in that: The supporting vertical plate (2) is provided with a positioning pin (7) for fixing the adapter flange (6).

7. A high-precision test sensor fixing device according to claim 1, characterized in that: The supporting upright plate (2) is provided with an upper supporting upright plate positioning hole (23) and a lower supporting upright plate positioning hole (24).

8. A high-precision test sensor fixing device according to claim 1, characterized in that: The adapter flange (6) is provided with an adapter flange upper positioning hole (25) and an adapter flange lower positioning hole (26).

9. A high-precision test sensor fixing device according to claim 5, characterized in that: The structure of the rotating shaft (3) is stepped, the large end is used as a shaft shoulder to fit tightly against the bushing (8) to prevent the rotating shaft (3) from axial movement, and the small end is tapped to fix the large nut (4).

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