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High-precision strain type torque sensor

A torque sensor and strain-type technology, applied in the field of high-precision strain-type torque sensors, can solve problems such as literature reports on micro-vibration measurement systems that have not been seen, and achieve the effects of expanding the test range, overcoming the lack of low-frequency signals, and improving the test accuracy.

Active Publication Date: 2013-12-25
BEIJING INST OF SPACECRAFT SYST ENG +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] At present, there is no literature report on this kind of micro-vibration measurement system at home and abroad.

Method used

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  • High-precision strain type torque sensor

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Embodiment Construction

[0013] The present invention provides a high-precision strain-type torque sensor, which is characterized in that it includes: two adapter plates 1, four strain columns 2, strain gauges 3, dynamic strain gauges 4, and a data acquisition and processing system 5;

[0014] Such as figure 1 As shown, the four strain columns 2 are connected and fixed with the upper and lower two adapter plates 1 by bolts. The strain columns 2 are square column structures, and each strain column has two semicircular grooves on the same side, symmetrical Strain gauges 3 are pasted on the back of the semicircular grooves of the two strain columns 2, that is, a total of four strain gauges 3 are pasted; when one of the two adapter plates 1 is fixed, the other adapter plate is applied When a torque is applied (the vibration source is installed at the center of the adapter plate), all four strain columns are deformed; due to the arc effect, each column will be in the corresponding position of the semicircu...

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Abstract

The invention provides a high-precision strain type torque sensor which comprises two changeover plates (1), four strain columns (2), strain pieces (3), a dynamic strain meter (4) and a data acquisition and processing system (5). The four strain columns (2) and the upper and the lower changeover plates (1) are fixed. The strain columns (2) are of square column structures, each strain column is provided with two semi-circular grooves, the strain pieces (3) are pasted on the backs, above the semi-circular grooves, of the two symmetrical strain columns (2), and the four strain pieces (3) are pasted totally. In the testing process, one changeover plate (1) is fixed, a vibration source is arranged in the center of the other changeover plate (1), and four kinds of strain generated by the four strain pieces (2) form a full-bridge. The dynamic strain meter (4) converts the strain generated by the strain pieces (3) into dynamic voltage signals. The data acquisition and processing system (5) collects the dynamic voltage signals, and torque is obtained according to the dynamic voltage signals.

Description

technical field [0001] The invention relates to a high-precision strain type torque sensor, which can be used for dynamic measurement of the vibration signal of the small torsional disturbance inside the spacecraft. Background technique [0002] Most of the current spacecraft are large-scale flexible deployment mechanisms with a large number of optical elements, which have high requirements for pointing accuracy and stability. In addition, in the attitude control system of modern spacecraft, reaction wheels, single-frame moment gyroscopes and solar wing drive mechanisms are important components in the control system. While they provide the necessary control power, they will also cause some harmful vibrations ( For simplicity, the above three systems are collectively referred to as disturbance sources below). These disturbances are mainly caused by flywheel unbalance, bearing disturbance, motor disturbance, motor drive error, etc. Among them, flywheel unbalance is the main c...

Claims

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Application Information

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IPC IPC(8): G01L3/22
Inventor 王成伦陈江攀李果程伟杨文涛于雪梅刘凤晶赵煜王光远沈中
Owner BEIJING INST OF SPACECRAFT SYST ENG
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