Water temperature detection method and system based on temperature sensor technology

Abstract

The invention relates to a water temperature detection method and system based on a temperature sensor technology. The system comprises a single-chip microcomputer and a reaction kettle, an output port of the single-chip microcomputer is electrically connected with a first control module and a second control module respectively, an output port of the first control module is electrically connected with an electric heating tube, an output port of the second control module is electrically connected with a cooling fan. A temperature sensor is mounted in the reaction kettle through a screw, an output port of the temperature sensor is electrically connected with an A / D conversion module, and an output port of the A / D conversion module is electrically connected with a signal amplification module. According to the invention, zero-crossing detection of power frequency voltage can be realized through a zero-crossing control circuit, a pulse signal is given, and the number of silicon controlled rectifier zero-crossing pulses is controlled by the single-chip microcomputer, so that radio frequency interference and electric frequency pollution are effectively eliminated, and temperature control is more accurate.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a water temperature detection method and system based on temperature sensor technology. Background technique [0002] A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. Temperature sensors are the core part of temperature measuring instruments. There are many varieties. They can be divided into two categories: contact type and non-contact type according to the measurement method. According to the characteristics of sensor materials and electronic components, they can be divided into thermal resistance and thermocouple. . [0003] The existing switching circuit will generate radio frequency interference and pollute the electric frequency with high-order harmonics or peaks, which will make the signal of the single-chip microcomputer abnormal to the electric heating tube, making the electric heating tube unable to accurat...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water temperature detection method and system based on temperature sensor technology to solve the problem of generating radio frequency interference and polluting electric frequency with high-order harmonics or peaks in the above-mentioned background technology

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