Method for multi-dimensional sensor dynamic test device based on stable-state sine excitation force

Abstract

The invention provides a method for a multi-dimensional sensor dynamic test device based on a stable-state sine excitation force. Known sine excitation force signals can recovered by a centrifugal force, which is generated by that a rotary motor drives an eccentric excitation block and the output shaft of the rotary motor to synchronously rotate, through adjusting the rotating speed of the rotary motor, the mass center position of the eccentric excitation block, and the mounting directions of the rotary motor and a to-be-measured force sensor in a process of loading a T-shaped rack and an L-shaped rack, and using a permanent magnet steel block to periodically excite a Hall sensor to output a pulse response signal, so as to realize the sine excitation force and the excitation force moment with continuously varied frequency and amplitude value in each dimension direction of the to-be-measured force sensor. By utilizing a physical method of the multi-dimensional sensor dynamic test device based on the stable-state sine excitation force, the sine excitation signals which are not influenced by an external environment and are foreseeable are generated, so as to realize the sine excitation force with stable amplitude, easiness for adjustment and continuously-varied frequency. The method is simple and convenient to operate, and the dynamic transmission property of the to-be-measured force sensor within an entire use frequency band range can be obtained.

Description

technical field [0001] The invention relates to the field of force sensor testing, in particular to a method for a multi-dimensional force sensor dynamic experimental device based on a steady-state sinusoidal excitation force. Background technique [0002] At present, with the rapid development of aviation, aerospace, robotics and other industries, higher requirements are put forward for the comprehensive performance indicators of multi-dimensional force sensors, especially the dynamic characteristics under actual use conditions. Therefore, dynamic calibration and parameter testing of multi-dimensional force sensors have become important. research topics. At present, the dynamic experiment method of multidimensional force sensor is divided into step response method, impulse response method and frequency response method according to the different forms of standard dynamic force source. The step response method and the impulse response method test the dynamic characteristics ...

AI Technical Summary

Problems solved by technology

The structure of the test bench is complex and difficult to adjust, especially for multi-dimensional force sensors with small range and small dimensions, it is difficult to ensure the precise loading position, and when two or more electromagnetic force generators work at the same time, it is difficult to ensure that the excitation force is loaded synchronously

[0008] The literature [The results of comparisons between two different dynamic force measurement systems", Measurement, Vol.10, No.3, 1992] proposes an electromagnetic vibrating table for dynamic testing of force sensors, in which a sine wave of a certain frequency is generated by a signal source The periodic signal drives the electromagnetic vibrating table to work. An accelerometer is installed on the load mass to measure the excitation force applied to the force sensor. This device can change the frequency of the output signal of the signal source within a certain frequency range to obtain different frequency points. Sensitivity of the sensor, but it is difficult to realize the dynamic force of large value and wide frequency band, and there are errors in the calculation method

[0009] The above-mentioned force sensor dynamic test devices based on the frequency domain all use a sinusoidal periodic signal of a certain frequency generated by the signal generator to excite the electromagnetic force generator, which is greatly affected by power fluctuations and external environmental interference, and voltage changes cause large changes in the excitation force. , the test accuracy is low

[0010] So far, the frequency response method has been rarely used at home and abroad to carry out dynamic experimental research on multi-dimensional force sensors. The main problem is that the standard force source is difficult to achieve, and there is a lack of corresponding dynamic standard force source devices, that is, to obtain stable amplitude, easy adjustment, and frequency. Continuously varying incentives are difficult, as evidenced by literature search results

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