Remote zero setting circuit and method for resistance-type strain measurement

Abstract

The invention discloses a remote zero setting circuit and a remote zero setting method for resistance-type strain measurement. The functions of the zero setting circuit are realized by operating a strain sensor, a zero setting signal detection circuit and the zero setting circuit together; the zero setting signal detection circuit monitors the signal state of an output current signal line constantly; and if the zero setting signal detection circuit detects that the current signal line and the ground are short circuited, the enabling of the zero setting signal is valid, and the zero setting circuit starts to work to realize the zero setting function of the resistance-type strain measurement. In the remote zero setting method for the resistance-type strain measurement, additional zero setting signal lines are not needed in the whole zero setting process; the zero setting method is simple and practical; staff do not need to go to the installation field of the sensor and the zero setting function of the sensor can be realized in a control room; and circuit parameters after the zero is set can be automatically stored and are not lost after interruption of power supply. The remote zero setting circuit for the resistance-type strain measurement solves the problems of great difficulty in zero setting of a resistance-type strain sensor, consumes low power and is low in cost, easy to operate, and convenient to popularize and use.

Description

Technical field: [0001] The invention relates to a zero-adjustment technology, in particular to a remote zero-adjustment technology and a zero-adjustment method for resistance strain measurement. Background technique: [0002] Due to the resistance matching of the resistance strain gauge or the resistance value of the transmission line, the output current or voltage signal of the resistance strain sensor drifts; or a certain stress state of the measured object is set as the initial state, all of which need to be corrected The signal is zero-adjusted, and the output signal of the sensor is adjusted to zero or a certain value. [0003] One of the methods of zero adjustment is to numerically process the output signal collected by the sensor and subtract the initial offset; the second method is to adjust the parameters of the sensor, such as adjusting the output offset of the sensor signal through a potentiometer. [0004] The first method of zero adjustment is suitable for com...

AI Technical Summary

Problems solved by technology

[0004] The first zero adjustment method is suitable for computer signal acquisition system, the method is simple, but it will affect the range and measurement range of the sensor

The second method is to adjust directly on the sensor circuit, which will bring a lot of inconvenience to the zero adjustment of sensors that are far away, difficult to reach, and have high sealing requirements.

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