CN213932457U

CN213932457U - Mechanical zero position detection device for attack angle sensor

Info

Publication number: CN213932457U
Application number: CN202022983867.7U
Authority: CN
Inventors: 梁玉娇; 陈松; 邱荷; 刘艳荣
Original assignee: Wuhan Aviation Instrument Co Ltd
Current assignee: Wuhan Aviation Instrument Co Ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-08-10
Anticipated expiration: 2030-12-11

Abstract

The utility model discloses an angle of attack sensor machinery zero-bit detection device. The machine frame comprises a machine frame table, wherein a position avoiding hole (2) is formed in the center of a table top (1) of the machine frame table, and positioning holes (3) are symmetrically formed in the table top (1) on two sides of the position avoiding hole (2); the back side of the machine frame table top (1) is provided with a positioning block (4), the positioning block (4) is provided with a positioning pin (5), and the center of the positioning pin (5) is aligned with the symmetric center of the two positioning holes (3) on the table top (1). The utility model has the characteristics of simple structure detects conveniently.

Description

Mechanical zero position detection device for attack angle sensor

Technical Field

The utility model belongs to the technical field of sensor machinery zero-bit detection, a angle of attack sensor machinery zero-bit detection device is related to.

Background

The attack angle sensor is used for measuring the attack angle of the airplane when the airplane flies, and the pneumatic zero position of the attack angle sensor is the most important parameter of the product. The pneumatic zero position refers to the position of the connecting line of the sensor positioning holes in a horizontal state and the symmetry center of the wind vane in a horizontal airflow field. The pneumatic zero position of the attack angle sensor can be confirmed only by a blowing test in a climate laboratory. Since the climate laboratory is expensive, the climate laboratory is not built anywhere, which brings trouble to the detection of the pneumatic zero position.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: a mechanical zero position detection device for an angle of attack sensor is provided. The utility model has the characteristics of simple structure detects conveniently.

The technical scheme of the utility model is that: a mechanical zero position detection device of an attack angle sensor comprises a rack table, wherein a avoidance hole is formed in the center of the table top of the rack table, and positioning holes are symmetrically formed in the table tops on two sides of the avoidance hole; the back side of the table top of the rack table is provided with a positioning block, the positioning block is provided with a positioning pin, and the center of the positioning pin is aligned with the symmetric center of the two positioning holes on the table top.

In the mechanical zero position detection device for the attack angle sensor, the rack table at the position of the positioning hole is also provided with a fixing component.

In the mechanical zero position detection device for the attack angle sensor, the fixing component comprises a pressing plate fixedly arranged on the rack platform, and a pressing screw is arranged on the pressing plate.

In the mechanical zero position detection device for the attack angle sensor, a lower flat plate parallel to the table top is further arranged below the table top of the machine frame, and a zero position reticle aligned with the vane zero position of the attack angle sensor in a measurement state is arranged on the lower flat plate.

In the mechanical zero position detection device for the attack angle sensor, the lower flat plate is provided with a maximum swing scale line aligned with the maximum swing angle of the vane of the attack angle sensor in a measurement state.

In the mechanical zero position detection device for the attack angle sensor, the table top and the lower flat plate are supported by four sleeves positioned at four corners of the lower flat plate, and guide pins penetrating through the table top are arranged in the sleeves.

In the mechanical zero position detection device of the attack angle sensor, the bottom end of the guide pin further penetrates through the lower flat plate to be connected with the support leg arranged on the back surface of the lower flat plate.

In the mechanical zero position detection device for the attack angle sensor, the positioning pin can move and be finely adjusted in the vertical direction.

The utility model has the advantages that: the utility model symmetrically arranges positioning holes at both sides of the position-avoiding hole on the table-board, and arranges a positioning pin at the back side of the table-board, the center of the positioning pin is aligned with the symmetric centers of the two positioning holes; during detection, the attack angle sensor penetrates through the avoiding hole and is positioned by using the positioning hole, then the positioning pin is clamped into the standard hole on the weathercock of the attack angle sensor, so that the attack angle sensor is in a mechanical zero position, and the pneumatic zero position can be indirectly measured by measuring the voltage output by the attack angle sensor at the moment; through the simple structure, the pneumatic zero position can be detected without a blowing test in a climate laboratory, and the detection is convenient.

To sum up, the utility model has the characteristics of simple structure detects convenient.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic top view of a mesa;

fig. 3 is a schematic view of the tool during detection.

Reference numerals: 1-table top, 2-avoidance hole, 3-positioning hole, 4-positioning block, 5-positioning pin, 6-fixing component, 61-pressing plate, 62-compression screw, 7-lower flat plate, 8-zero position marking line, 9-maximum swinging amount marking line, 10-sleeve, 11-guide pin, 12-supporting leg, 13-attack angle sensor, 14-vane and 15-standard hole.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Example 1. A mechanical zero position detection device of an attack angle sensor is shown in figures 1-3 and comprises a rack table, wherein a position avoiding hole 2 is formed in the center of a table top 1 of the rack table, and positioning holes 3 are symmetrically formed in the table top 1 on two sides of the position avoiding hole 2; the dorsal part of rack platform face 1 is equipped with locating piece 4, is equipped with locating pin 5 on the locating piece 4, and the symmetry center of two locating holes 3 aligns on locating pin 5 center and the mesa 1.

Besides the zero position of the dynamic angle, the angle of attack sensor also has a mechanical zero position and an electrical zero position. The mechanical zero position is the symmetrical center of the attack angle sensor; the electric zero position refers to the position of the symmetrical center of the vane when the output of the attack angle sensor is 0 mV. In a theoretical state, when a horizontal wind tunnel is calibrated, the wind vane is positioned at the symmetrical center of the attack angle sensor, and at the moment, the pneumatic zero position, the mechanical zero position and the electrical zero position of the attack angle sensor are superposed. Due to manufacturing errors, the mechanical zero position and the pneumatic zero position of the angle of attack sensor are not coincident, and an angle difference alpha exists between the two. After the attack angle sensor is assembled, the angle difference alpha is a fixed value, and the angle difference alpha is different for different attack angle sensors. In order to ensure the measurement accuracy, the attack angle sensor adjusts 4 paths of output to be 0mV at the pneumatic zero position, namely the electric zero position is aligned with the pneumatic zero position. Therefore, whether the pneumatic zero position changes relative to the factory state is judged when no instrument wind tunnel exists, and indirect detection can be carried out through the mechanical zero position. The detection process is as follows:

firstly, mounting an attack angle sensor 13 on an upper table top 1, and positioning by using a positioning hole 3;

secondly, inserting the positioning pin 5 into a standard hole 15 on a vane 14 of the attack angle sensor 13;

and thirdly, measuring the output voltage of the attack angle sensor 13 at the moment by using a standard voltmeter, and calculating the angle beta by taking the average value of the four paths of voltage.

And fourthly, comparing a beta-alpha value obtained by subtracting the angle beta value from the angle difference alpha value with a specified deviation range, and judging whether the product is qualified.

And a fixing component 6 is also arranged on the stand at the position of the positioning hole 3. The fixing component 6 is used for fixing the attack angle sensor 13 after the positioning hole 3 is positioned.

The fixing component 6 comprises a pressing plate 61 fixedly arranged on the frame, and a pressing screw 62 is arranged on the pressing plate 61. The fixing process of the fixing assembly 6 is specifically to press the pressing plate 61 against the attack angle sensor 13 and then screw the pressing screw 62.

A lower flat plate 7 parallel to the table top 1 is further arranged below the table top 1 of the stand, and a zero position reticle 8 aligned with the vane zero position of the attack angle sensor in a measuring state is arranged on the lower flat plate 7 so as to conveniently calibrate the vane position.

The lower flat plate 7 is provided with a maximum swing scale line 9 aligned with the maximum swing angle of the vane of the attack angle sensor in the measurement state.

The table top 1 and the lower flat plate 7 are supported by four sleeves 10 positioned at four corners of the lower flat plate 7, and guide pins 11 penetrating from the table top 1 are arranged in the sleeves 10.

The bottom ends of the guide pins 11 are also connected to the legs 12 provided on the back of the lower plate 7 through the lower plate 7. This structure, easy dismounting.

The positioning pin 5 can move and finely adjust in the vertical direction. This structure can make things convenient for locating pin 5 to aim at the standard hole.

Claims

1. A mechanical zero position detection device of an attack angle sensor is characterized by comprising a rack table, wherein a avoidance hole (2) is formed in the center of a table top (1) of the rack table, and positioning holes (3) are symmetrically formed in the table top (1) on two sides of the avoidance hole (2); the back side of the machine frame table top (1) is provided with a positioning block (4), the positioning block (4) is provided with a positioning pin (5), and the center of the positioning pin (5) is aligned with the symmetric center of the two positioning holes (3) on the table top (1).

2. The mechanical zero position detecting device of an angle of attack sensor as claimed in claim 1, wherein the mounting block (6) is further provided at the location of the positioning hole (3).

3. The mechanical zero position detecting device of an angle of attack sensor as claimed in claim 2, wherein the fixing component (6) comprises a pressing plate (61) fixed on the frame, and a pressing screw (62) is arranged on the pressing plate (61).

4. The mechanical zero position detection device for the angle of attack sensor according to claim 1, wherein a lower flat plate (7) parallel to the table top (1) is further disposed below the table top (1) of the stand, and a zero position reticle (8) aligned with the vane zero position of the angle of attack sensor in a measurement state is disposed on the lower flat plate (7).

5. The mechanical zero position detector of an angle of attack sensor according to claim 4, characterized in that the lower plate (7) is provided with a maximum oscillation scale (9) aligned with the maximum oscillation angle of the vane of the angle of attack sensor under measurement.

6. The mechanical zero position detecting device of an angle of attack sensor according to claim 4, characterized in that the table top (1) and the lower plate (7) are supported by four sleeves (10) at four corners of the lower plate (7), and guide pins (11) penetrating from the table top (1) are arranged in the sleeves (10).

7. The mechanical zero position detecting device of an angle of attack sensor as claimed in claim 6, wherein the bottom end of the guide pin (11) is connected to a leg (12) provided on the back of the lower plate (7) through the lower plate (7).

8. Mechanical zero position detection device of an angle of attack sensor according to claim 1, characterized in that the positioning pin (5) is vertically movable for fine adjustment.