Low-temperature calibration device of laser displacement sensor

Abstract

The invention relates to a low-temperature calibration device of a laser displacement sensor. The low-temperature calibration device of the laser displacement sensor is characterized in that four leveling nuts are mounted at the bottoms of four support columns, support screws are provided with threads, the nuts sleeve the support screws respectively and are arranged on a sensor fixing plate, the sensor fixing plate is fixed to the four support columns through clamps, the laser displacement sensor below the sensor fixing plate is fixed through a fixing frame and screws, a direct current switch power supply is connected to the laser displacement sensor through a wire, a data acquisition instrument is connected to a laptop through a wire, the data acquisition instrument and the laser displacement sensor are connected to the direct current switch power supply through a wire, and a gauge block is arranged below a support, on the plate and under the laser displacement sensor. The low-temperature calibration device of the laser displacement sensor enables the laser displacement sensor to be used in a permafrost deformation test and can calibrate the laser displacement sensor at a low temperature to verify indicators, such as performance and accuracy of the laser displacement sensor used in the low-temperature permafrost deformation test.

Description

technical field [0001] The invention relates to a low temperature calibration device for a laser displacement sensor. Background technique [0002] Sensor calibration is the process of using standard instruments with higher precision to calibrate the sensor, so as to establish the corresponding relationship between the sensor output and input. At the same time, the error relationship under different conditions of use is also determined. The basic method of calibration is to use a standard instrument to generate a known non-electric quantity as an input quantity, input it into the sensor to be calibrated, and then compare the output quantity of the sensor with the input standard quantity to obtain a series of standard data or curves. Determining the performance indicators of the sensor based on the test data is actually determining the measurement accuracy of the sensor. [0003] Permafrost is a heterogeneous, multiphase, porous, negative temperature discontinuous medium co...

AI Technical Summary

Problems solved by technology

Laser displacement sensors have been widely used in many fields that require precise measurement and detection. However, there are very few examples for geotechnical engineering tests, and almost none for frozen soil tests.

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