CN216745924U

CN216745924U - Automatic testing equipment for angular displacement sensor

Info

Publication number: CN216745924U
Application number: CN202123319512.9U
Authority: CN
Inventors: 熊宏伟; 黄晔; 周健
Original assignee: Wuhan Aviation Instrument Co Ltd
Current assignee: Wuhan Aviation Instrument Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-14
Anticipated expiration: 2031-12-27

Abstract

The utility model belongs to the technical field of airplane angular displacement sensor detection devices, and relates to automatic angular displacement sensor testing equipment. The utility model is composed of a base, a precise rotary table, an encoder, a spring chuck, a locking hand wheel, a small hand wheel and a dial, on the basis of the traditional angular displacement sensor detection equipment, a stepping motor, a rotary table, an acquisition card, an industrial personal computer and the like are added, a detected product is fixed through the spring chuck, the stepping motor drives the rotary table to automatically rotate for an angle, the acquisition card automatically acquires and automatically stores data in a form, whether the detection is qualified or not is automatically judged and read, the automatic detection of the angular displacement sensor is realized, the equipment reliability is higher, errors caused by personnel operation are reduced, the operation is simpler and more convenient, and the safety performance is good.

Description

Automatic testing equipment for angular displacement sensor

Technical Field

The utility model belongs to the technical field of airplane angular displacement sensor detection devices, and relates to automatic angular displacement sensor testing equipment.

Background

In the detection device of the airplane angular displacement sensor, a traditional detection device is mainly used for driving a detected product (the angular displacement sensor) to deflect a designated angle through an angle deflection clamp, and measuring the output voltage of the detected product through a digital multimeter in a test mode as shown in figure 1. The mechanical measuring mode is easy to cause large error caused by poor contact, more angle measuring points are arranged, an operator repeatedly adjusts the angle deflection clamp, the working efficiency is low, and errors caused by human factors are easy to generate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide automatic testing equipment for an angular displacement sensor, which supplies power to a tested product, automatically acquires the output voltage of the tested product through an acquisition card when a turntable is controlled to drive the tested product to rotate to a specified angle, and can automatically judge whether the performance of the angular displacement sensor is qualified.

The technical solution of the utility model is as follows:

an automatic testing device for an angular displacement sensor comprises a base, a precise rotary table, an encoder, a spring chuck, a locking hand wheel, a small hand wheel and a dial, and is shown in figure 3. The precision rotary table is horizontally arranged on the base, a stepping motor is arranged on a central shaft of the precision rotary table, and the dial is arranged on a longitudinal connecting shaft of the precision rotary table. The small hand wheel is arranged at the operation end of the transverse connecting shaft of the precision rotary table, the encoder is positioned between the precision rotary table and the small hand wheel, the spring chuck is arranged at the clamping end of the transverse connecting shaft of the precision rotary table, and the locking hand wheel is arranged on the base and used for fixing a product to be tested. The tested product is clamped on the spring chuck, and the locking hand wheel controls the tightness of the spring chuck through rotation. The transmission shaft of the stepping motor drives the horizontal shaft of the precision turntable and the angle sensor of the tested product to perform deflection motion.

The spring chuck is of a double-layer arc-shaped structure and is tightly clamped by rotating the locking hand wheel.

The spring chuck is made of beryllium bronze, has good elasticity after solid solution and aging treatment, and can prevent the chuck from damaging the surface of a product during clamping.

And zero-position scale lines are arranged on the dial and are used for aligning to the mechanical zero position of the product.

Still include the chuck, the chuck setting is between step motor and accurate revolving stage for the shell of chucking encoder prevents that encoder and axle from rotating together.

The device also comprises a stop block, wherein the stop block is arranged on the base and used for limiting the deflection angle of the product to be detected.

The utility model has the advantages that: the utility model adds a stepping motor, a turntable, an acquisition card, an industrial personal computer and the like on the basis of the traditional angular displacement sensor detection equipment, fixes a detected product through a spring chuck, the stepping motor drives the turntable to automatically rotate by the angle, the acquisition card automatically acquires and automatically stores data in a form, whether the detection is qualified or not is automatically judged, the automatic detection of the angular displacement sensor is realized, the reliability of the equipment is higher, errors brought by personnel operation are reduced, the operation is simpler and more convenient, and the safety performance is good.

Drawings

FIG. 1 is a schematic view showing the construction of a turntable according to the present invention;

FIG. 2 is an axial schematic view of a turntable embodying the present invention;

FIG. 3 is a schematic diagram showing the construction of the collet of the present invention;

Detailed Description

The present invention will be further described with reference to the following examples. The following description is only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The following further describes the embodiments of the present invention with reference to the drawings.

The utility model provides an automatic test device of an angular displacement sensor, which is characterized in that the test device controls an internal power supply to provide 6.3V direct current voltage for a tested product through a relay, 2 paths of output signals of the tested product are collected by an ME4670 data collection card in an industrial personal computer, and the collected two paths of voltage are displayed on a display interface after the processing operation of special test software;

the tested product is arranged on a rotary table configured by the testing equipment, a stepping motor is configured in the rotary table, and the stepping motor can be controlled to move through a program control module of the stepping motor to drive a horizontal shaft of the rotary table to rotate. The tested product is fixed on the rotary table by adopting a clamping method specially designed according to the structural characteristics of the product, so that the consistency and the synchronism of the rotation of the rotating shaft of the rotary table and the rotating part on the product during measurement can be ensured. The turntable also drives the rotary encoder to move while rotating, at the moment, the rotary encoder outputs a high-frequency pulse signal, the industrial personal computer receives the signal and carries out processing operation through special test software, and a control signal is sent to the control stepping motor control module to enable the stepping motor to drive the tested product to rotate to a specified angle, and the deflection angle is displayed on the display interface.

The rotary table mainly comprises a base 1, a precision rotary table 5, an encoder 6, a collet chuck 2, a locking hand wheel 3, a small hand wheel 7 and a dial 4, as shown in figure 3. The precision rotary table 5 is horizontally arranged on the base 1, a stepping motor is arranged on a central shaft of the precision rotary table 5, and the dial 4 is arranged on a longitudinal connecting shaft of the precision rotary table 5. The small hand wheel 7 is arranged at the operation end of the transverse connecting shaft of the precision rotary table 5, the encoder is positioned between the precision rotary table 5 and the small hand wheel 7, the spring chuck 2 is arranged at the clamping end of the transverse connecting shaft of the precision rotary table 5, and the locking hand wheel 3 is arranged on the base 1 and used for fixing a product to be tested. The tested product is clamped on the collet chuck 2, and the locking hand wheel 3 controls the tightness of the collet chuck through rotation. The transmission shaft of the stepping motor drives the horizontal shaft of the precision turntable and the angle sensor of the tested product to perform deflection motion.

The collet chuck 2 is a double-layer arc-shaped structure, and the collet chuck 2 is tightly clamped by rotating the locking hand wheel 3.

The spring chuck 2 is made of beryllium bronze, has good elasticity after solid solution and aging treatment, and can prevent the chuck from damaging the surface of a product during clamping.

And zero-position scale marks are arranged on the dial 4 and are used for aligning to the mechanical zero position of a product.

Still include the chuck, the chuck setting is between step motor and precision revolving stage 5 for chucking encoder 6's shell prevents that encoder 6 and axle from rotating together.

The device also comprises a stop block which is arranged on the base 1 and used for limiting the deflection angle of a measured product.

An automatic test device for an angular displacement sensor provides a new clamping method and a mode for reading a deflection angle, and can realize automatic detection of a tested product.

Core invention point 1: the tested product is connected with the rotary table through the spring chuck, the tested product is clamped by the spring chuck with special design, the locking hand wheel is arranged at the axial position of the tested product, the tightness of the chuck can be controlled by rotating the hand wheel, and the clamping precision of the product is ensured while the operation is convenient.

Secondary invention 2: the industrial personal computer is communicated with the stepping motor control module to control the stepping motor to deflect and read the deflection angle of the rotary table in real time.

Secondary invention point 3: the output voltage of the tested product is read by the acquisition card, and the data is stored in the table.

Secondary invention point 4: the stepping motor is connected with the rotary shaft of the rotary table through the worm, and the worm is provided with the elastic coupling, so that the worm has good depolarization performance.

The tested product is clamped by a specially designed spring chuck, a locking hand wheel is arranged at the axial position of the tested product, the tightness of the chuck can be controlled by rotating the hand wheel, and the clamping precision of the product is ensured while the operation is convenient. In addition, the spring chuck is made of beryllium bronze and has good elasticity after solid solution and aging treatment, and the damage of the chuck to the surface of a product can be prevented when the spring chuck is clamped. The clamping reliability and the deflection angle measurement accuracy are ensured from the aspects of the clamping mode and the material.

The stepping motor is connected with a turbine of the rotary shaft of the rotary table through a worm, and the worm is provided with an elastic coupling, so that the rotary table has good depolarization performance. Meanwhile, the encoder is mounted coaxially with the rotating shaft of the rotary table, and the central through hole of the rotary table and the rotating shaft of the rotary table have strict concentricity requirements, so that the consistency of the rotating angles can be ensured. A mechanical dial is additionally arranged on the rotary table, so that the deflection direction and the approximate position of a product can be conveniently checked.

The special test software installed in the test equipment is developed and designed by adopting a special programming language LABVIEW for developing a measurement and control system, so that the display and storage of test data can be realized, and meanwhile, an operation control is provided on a user interface to control the test flow. The test principle is as follows:

the function realization of the test software is mainly to use the DIO port of the overdrive data acquisition card to send different signals to control the on-off of the circuit system and the motion state of the stepping motor, use the AI port to acquire the output signal of the tested product, process and operate the data and send a control signal to the test equipment through the DIO port, thereby realizing the control of the whole test system and the test flow according to the measurement requirements of the user.

The rotary table 4 mainly comprises a base, a precise rotary table, a high-precision rotary encoder, a spring chuck, a locking hand wheel, a small hand wheel, a dial and the like, as shown in fig. 3. The precise rotary table is horizontally arranged on the base, and the small hand wheel and the dial are arranged on a transmission mechanism of the precise rotary table. The rotary encoder, the spring chuck and the locking hand wheel are arranged on a horizontal transmission shaft of the precision rotary table. The tested product is clamped on the spring chuck, and the locking hand wheel controls the tightness of the spring chuck through rotation. The transmission shaft of the stepping motor can drive the horizontal shaft of the precision turntable and the angle sensor of the tested product to do deflection motion.

The test method comprises the following steps:

and installing the tested product on the rotary table, clamping the rotating part of the tested product by using a spring chuck, and screwing down the locking hand wheel to fix the tested product. Connecting each test cable with the product and the test equipment, switching on the power supply of the test equipment, turning on a power switch, starting the industrial personal computer, and starting the test software to enter a user interface.

And clicking a deflection angle detection control on a user interface, switching on the product power supply, reading the output voltage of the product at the moment, and comparing the output voltage with the specified standard output voltage of the zero position of the product. The industrial personal computer controls the rotary table to move until the output voltage of the product is the same as the specified value, the state of the product is considered to be the zero position at the moment, and meanwhile, the stepping motor stops moving and the deflection angle is initialized. And then starting from the zero position of the product, controlling the product to move along the clockwise direction and the anticlockwise direction (namely the positive direction and the negative direction of the deflection angle) respectively until reaching the extreme positions (the limiting devices) at the two ends. At the moment, the deflection angles in the two directions are compared with the specified standard angle, so that whether the deflection angle of the product is qualified or not is judged, and the detection of the deflection performance of the product is realized.

Clicking an 'output precision detection' control on a user interface, and automatically changing the product and initializing the deflection angle in the same way as the deflection angle detection. Starting from the zero position of the product, the program controls the stepping motor to move, drives the rotary table to enable the product to rotate in the positive direction, the output voltage of the product is measured every 5 degrees of deflection, the product automatically returns to zero after the maximum deflection angle of the product is reached, and the output precision in the negative direction is detected according to the same test flow. And after the test is finished, the product returns to the zero position, all the measurement data are displayed and stored, the comparison with the specified standard output is carried out, and the detection is qualified within the error range.

Clicking an output continuity detection control on a user interface, controlling a stepping motor by an industrial personal computer to drive a detected product to do uniform periodic reciprocating motion within an angle range of-60 degrees to +60 degrees, acquiring an output voltage signal of the product and displaying a curve of the output voltage changing along with time on the user interface. And observing the curve, and when the curve is continuous and has no obvious jump, the continuity detection is qualified.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic testing device of an angular displacement sensor is characterized by comprising a base (1), a precision rotary table (5), an encoder (6), a spring chuck (2), a locking hand wheel (3), a small hand wheel (7) and a dial (4); the precise rotary table (5) is horizontally arranged on the base (1), a stepping motor is arranged on a central shaft of the precise rotary table (5), and the dial (4) is arranged on a longitudinal connecting shaft of the precise rotary table (5); the small hand wheel (7) is arranged at the operation end of the transverse connecting shaft of the precision rotary table (5), the encoder is positioned between the precision rotary table (5) and the small hand wheel (7), the spring chuck (2) is arranged at the clamping end of the transverse connecting shaft of the precision rotary table (5), and the locking hand wheel (3) is arranged on the base (1) and used for fixing a product to be tested; a tested product is clamped on the collet chuck (2), and the locking hand wheel (3) controls the tightness of the collet chuck through rotation; the transmission shaft of the stepping motor drives the horizontal shaft of the precision turntable and the angle sensor of the tested product to do deflection motion.

2. The automatic testing equipment of the angular displacement sensor according to claim 1, characterized in that the collet chuck (2) is a double-layer arc structure, and the collet chuck (2) is clamped by rotating the locking hand wheel (3).

3. An automatic test equipment of an angular displacement sensor according to claim 1, characterized in that the collet chuck (2) is made of beryllium bronze and is treated with solid solution and aging.

4. An automatic testing device for an angular displacement sensor according to claim 1, characterized in that the dial (4) is provided with zero graduation marks.

5. An automatic testing equipment of an angular displacement sensor according to claim 1, characterized by further comprising a chuck, arranged between the stepping motor and the precision turntable (5), for clamping the housing of the encoder (6) and preventing the encoder (6) from rotating together with the shaft.

6. The automatic testing equipment of the angular displacement sensor according to claim 1, characterized by further comprising a stopper, wherein the stopper is arranged on the base (1) for limiting the deflection angle of the tested product.