Data acquisition system for enhanced stress type force sensor

Abstract

The invention relates to a data acquisition system for an enhanced stress type force sensor, and aims to solve the problem in the prior art that measuring errors of the data acquisition system are caused as the excitation voltage of the enhanced stress type force sensor and the reference voltage of an A / D chip are interfered. The data acquisition system provided by the invention comprises a power supply module, a stress type force sensor, a filter, an A / D converter and a data processor, wherein the power supply module supplies the voltage; the output end of the stress type force sensor is respectively connected with the input end of the filter; the output end of the filter is connected with the input end of the A / D converter; the A / D converter is connected with the data processor; the data processor acquires a coefficient of sensitivity of the sensor; the reference voltages supplied to the stress type force sensor and the A / D converter are the same. The system provided by the invention has the advantage that the coefficient of sensitivity of the sensor has no relation with the excitation voltage of a standard sensor, namely, the coefficient of sensitivity of the sensor is not affected by fluctuation of the excitation voltage of the sensor.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and in particular relates to an enhanced strain sensor data acquisition system. Background technique [0002] The resistance strain sensor is a sensor with a resistance strain gauge as a resistance conversion element, and is widely used in the measurement of physical parameters such as displacement, pressure, torque, strain, temperature, humidity, and light intensity. The highest transmission standard of force value is the resistance strain sensor. [0003] The working principle of the resistance strain sensor is a strain gauge with a metal material as the conversion element, and its conversion principle is based on the resistance-strain effect of the metal resistance wire. The so-called strain effect refers to a physical phenomenon in which the resistance value of a metal conductor (resistance wire) changes with deformation (elongation or shortening). A metal wire with a circul...

AI Technical Summary

Problems solved by technology

[0024] The purpose of the present invention is to solve the problem of the measurement error of the data acquisition system caused by the interference of the excitation voltage of the strain gauge force sensor and the reference voltage of the A / D chip in the prior art, and to provide a method that is not disturbed by the above excitation voltage and the reference voltage. Affected Enhanced Strain Gauge Force Sensor Data Acquisition System

Images