Dynamic range expansion device for carrier catalysis methane gas concentration detection element and method

Abstract

The invention provides a dynamic range expansion device for a carrier catalysis methane gas concentration detection element. The device comprises a switching module and a controller, wherein the switching module is used for switching a carrier catalysis detection mode and a heat conduction detection mode; the controller is used for controlling the switching module to switch detection modes; a control signal output end of the controller is connected with a control input end of the switching module; a carrier catalysis detection input end of the controller is connected with a carrier catalysis detection output end of the switching module; a heat conduction detection input end of the controller is connected with a heat conduction detection output end of the switching module and used for receiving methane concentration signals detected in the heat conduction detection mode. With the combination of a carrier catalysis detection principle with a heat conduction detection principle, the technical defect that a single carrier catalysis element is narrow in measurement range can be overcome, dynamic range expansion of the carrier catalysis methane gas concentration detection element can beachieved, in addition, the methane gas concentration detection precision can be improved in a carrier temperature modification mode, and the device has wide applicability.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a dynamic range expansion device and method for a carrier-catalyzed methane gas concentration detection element. Background technique [0002] With the advancement of science and technology, in coal mining enterprises, the application of wireless sensors to mine safety monitoring will become more and more common. In the existing methane sensors, most of the detection principles are carrier catalysis, thermal conductivity, infrared or laser optical detection, and the cost of infrared or laser optical detection is dozens of times higher than that of carrier catalysis and thermal conductivity. promotion and application of related technologies. When the methane concentration of the carrier catalytic element rises, the temperature of the internal catalyst also rises. When the temperature is higher than 600°C, the catalyst will undergo redox reaction, and the element will fai...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a device and method for dynamically expanding the range of a carrier catalytic methane gas concentration detection element, which overcomes the technical defect of a single carrier catalytic element with a narrow measurement range, and realizes the dynamic range extension of the carrier catalytic methane gas concentration detection element.

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