Novel temperature measuring method based on resistor-inductor (RL) circuit zero-input response

Abstract

The invention relates to a novel temperature measuring method based on resistor-inductor (RL) circuit zero-input response. The novel temperature measuring method adopts a simple RL series circuit and controls zero-input response of the RL circuit through a singlechip, an inner comparator and a timer work cooperatively, so that the relationship between zero-input response time and resistance is built, and field temperature values can be obtained by replacing simple software algorithm with complex hardware circuits. The novel temperature measuring method replaces hardware units with software design by using a resistor, an inductor and the singlechip, improves economical efficiency of device application, and is strong in expandability, suitable for temperature measuring of thermistors, photoresistors, piezoresistors and gas-sensitive resistors, stable in performance and capable of being widely applied to parameter measuring of industrial fields. The novel temperature measuring method can replace traditional temperature-measuring sensors of thermistors and can be widely applied to temperature measuring of power plants, electrical fields and other industrial fileds.

Description

technical field [0001] The invention relates to a temperature measuring system, in particular to a novel temperature measuring method based on the zero-input response of an RL circuit. Background technique [0002] Temperature measurement is a very important task in many industrial control fields, and different types of temperature measurement methods are required in different field environments. The traditional temperature measurement methods widely used at present include contact instruments, such as solid-liquid expansion and pressure temperature sensors, thermocouples and thermal resistance thermometers, and non-contact optical sensors, such as infrared temperature measurement and CCD image measurement. warm method. [0003] Traditional temperature measurement methods such as thermocouples, thermal resistances, and infrared temperature sensor outputs are analog signals, the hardware circuit is complex, and the system acquisition requires an AD conversion unit, which has...

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at the problem that the circuit of the traditional temperature measuring device based on the principle of electric bridge balance is complex and requires many hardware resources. Control the zero-input response of the RL circuit, the internal comparator and the timer work together to establish the relationship between the zero-input response time and the resistance, and the simple software algorithm replaces the complex hardware circuit to obtain the on-site temperature value

Images