Infrared gas sensor

Abstract

The invention discloses an infrared gas sensor which comprises an infrared light source, a measurement module, a signal processing module connected with the measurement module and a microprocessor connected with the processing module and the infrared light source, wherein the infrared light source generates broad band pulse infrared lights; the measurement module receives the infrared lights, detects an ambient temperature signal and the size of an infrared light signal and sends the ambient temperature signal and the size of the infrared light signal to the microprocessor; after acquiring the temperature signal, the micro processor compares a preset infrared light signal under the ambient temperature with the measured infrared light signal, modulates the switching frequency of the infrared light source according to a comparison result and acquires a gas concentration signal according to infrared lights emitted by the modulated infrared light source. According to the infrared gas sensor, a process of measuring the ambient temperature signal is added; the switching frequency of the infrared light source is modulated through the change of the infrared light signal, so that the influence of the ambient temperature on the measurement module is reduced, and the measurement precision is improved.

Description

technical field [0001] The invention relates to the field of measurement, in particular to an infrared gas sensor. Background technique [0002] In recent years, with people's attention to infrared gas sensors, the technology of infrared gas sensors has become more and more perfect. The infrared gas sensor has the characteristics of high measurement accuracy, strong anti-interference ability, high reliability, anti-poisoning, long life and so on. The accuracy of the signal measured by the commonly used infrared gas sensor will be affected by the change of the ambient temperature. The measurement accuracy of the sensor decreases at high temperature, and data loss occurs at low temperature, so that the gas concentration cannot be measured. [0003] Since the measurement accuracy of the currently used infrared gas sensor will be affected by the change of the ambient temperature, this results in the infrared gas sensor being unable to accurately measure the gas concentration or...

AI Technical Summary

Problems solved by technology

The accuracy of the signal measured by the commonly used infrared gas sensor will be affected by the change of the ambient temperature. The measurement accuracy of the sensor decreases at high temperature, and data loss occurs at low temperature, so that the gas concentration cannot be measured.

[0003] Since the measurement accuracy of the currently used infrared gas sensors will be affected by the change of the ambient temperature, this leads to the inability of the infrared gas sensor to accurately measure the gas concentration or the gas concentration at high or low temperatures.

Images