Multi-channel AC/DC excitation signal measuring system for strain force sensor

Abstract

The invention relates to a multi-channel AC/DC excitation signal measuring system for a strain force sensor. A digital signal processor (DSP) is taken as the core, an AC/DC excitation mode is adoptedto select an excitation scheme with adjustable AC excitation frequency, a digital control scheme with automatic optimization of excitation frequency and modulation frequency band is adopted, a digitallow-pass filter, amplitude correction and digital signal amplification processing flow is adopted for a DC excitation mode, and a digital band-pass filter, digital signal demodulation, vector correction and digital signal amplification processing flow is adopted for an AC excitation mode, so that multi-channel and high precision signal measurement of the strain force sensor under different interference environments is realized. The system includes a hardware system and a software signal processing method. Through adoption of the multi-channel AC/DC excitation signal measuring system, the selection of the excitation mode and the signal processing flow can be automatically optimized, and the influences of excitation signal fluctuation and line parasitic parameters can be corrected, therebyrealizing high-precision measurement of single or multiple strain force sensors with up to eight measuring bridges.

Description

technical field [0001] The invention relates to the field of force detection, and is a signal measurement system of a strain gauge force sensor, in particular, a digital signal processor as the core, which can select AC excitation and DC excitation and adopts digital signal processing methods to realize the detection of different interference environments. A multi-channel signal measurement system for high-precision measurement of the output signal of the strain gauge force sensor. Background technique [0002] Strain force sensors are widely used in scientific experiments and industrial automation due to their simple structure, small size, high measurement accuracy, and stable performance. With the development of technology, strain gauge force sensors are not only used for single-dimensional force measurement, but also made into integrated, compact multi-dimensional force / torque sensors with multiple measurement channels, which are widely used in scientific experiments and ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the strain gauge force sensor cannot be accurately measured due to the noise interference of the same frequency band under different interference environments. Multi-channel strain gauge force sensor signal measurement system with artificial setting or automatic selection of excitation mode, excitation frequency and measurement bandwidth for noise conditions

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