A device for measuring ice thickness based on piezoresistive sensor

Abstract

The invention relates to ice layer thickness measuring devices, in particular to an ice layer thickness measuring device based on piezoresistive sensors, belongs to the technical field of automatic detection, and solves the technical problem that a contact type ice layer thickness measuring device or sensor is complex in structure or large in measuring error and the like in the prior art. The icelayer thickness measuring device comprises several independent piezoresistive sensors, a chip selection circuit, a microcontroller, a data collecting circuit, a resistance conversion circuit, a powercircuit and a shell, wherein the piezoresistive sensors are fixed on the surface of the shell in an equal-distance manner and used for converting the acting force of air, an ice layer or water under the ice layer on the piezoresistive sensors into resistance value change; the microcontroller controls the chip selection circuit to sequentially select one independent piezoresistive sensor; the resistance conversion circuit converts the resistance value of the selected piezoresistive sensor into voltage value output; the microcontroller measures and compares the voltage values to determine the positions of the upper and lower interfaces of the ice layer so as to calculate the thickness of the ice layer. The ice layer thickness measuring device is simple in structure, stable, reliable, convenient to mount and maintain and the like.

Description

technical field [0001] The invention relates to an ice layer thickness measuring device, in particular to an ice layer thickness measuring device based on a piezoresistive sensor, belonging to the technical field of automatic detection. Background technique [0002] In the fields of weather forecasting, ice flood prevention, and structural health monitoring of facilities, the change of ice thickness is an important environmental parameter that needs to be measured. In order to measure the thickness of the ice layer, people have to drill holes in the ice and use a ruler to measure the thickness of the ice layer. Although this method of manual measurement is accurate, it is time-consuming, labor-intensive and dangerous, and cannot continuously and real-time monitor changes in ice thickness. [0003] Later, some contact ice thickness measurement techniques and devices appeared one after another. Chinese patent (201210139060.2) discloses a dual-system ice layer thickness measu...

AI Technical Summary

Problems solved by technology

However, since the electrical properties such as electrical conductivity and dielectric constant of air and ice are very similar, neither of these two methods can accurately determine the position of the upper interface of the ice layer, and thus cannot accurately measure the thickness of the ice layer

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