Gas detection digital bridge and its detection processing method

Abstract

The invention discloses a gas detection digital bridge and a detection processing method thereof. The gas detection digital bridge comprises a gas sensor power supply circuit, a gas sensor, a signal filter circuit, a two-way analog to digital conversion device and a singlechip, wherein the voltage output end of the gas sensor power supply circuit and the voltage output end of the gas sensor are connected with two signal input ends of the signal filter circuit, respectively, two signal output ends of the signal filter circuit are connected with two signal input ends of the two-way analog to digital conversion device, respectively, and the two-way analog to digital conversion device is connected with the singlechip. The gas detection digital bridge disclosed by the invention is used for replacing an analog bridge to eliminate the influence of a supply voltage on the measurement precision of the gas sensor, and such processing circuits as an amplifying circuit do not need to be arranged, thereby not only reducing the number of circuit elements and saving the circuit space, but also improving the anti-jamming capability, the stability and the measurement precision of related products, prolonging the service life of the products and greatly improving the product quality.

Description

technical field [0001] The invention relates to the technical field of gas detection and monitoring, in particular to a gas detection digital bridge and a detection and processing method thereof. Background technique [0002] Gas detection technology has been more and more widely used in the field of environment and safety, such as atmospheric environment gas component detection, agricultural greenhouse planting and production gas environment detection, living and living environment toxic and harmful gas detection, traffic safety drunk driving detection, industrial production (coal , petroleum, natural gas, chemical industry) flammable or toxic and harmful gas safety detection and monitoring fields, etc. At present, the general-purpose gas detection processing circuit is a traditional analog circuit or an analog-digital hybrid circuit. The front-end gas sensor measurement amplifier circuit part adopts an analog circuit, including an analog bridge measurement circuit and an a...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a gas detection digital bridge and its detection processing method, which can improve the problem of poor anti-interference ability and stability of the existing gas detection processing circuit, and can effectively eliminate the influence of power supply voltage drift on the output of the gas sensor. And the output of the gas sensor is calibrated so that the gas sensor has better uniformity and versatility

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