Novel methane sensor

Abstract

The invention discloses a novel methane sensor which comprises a supporting base, an outer protective shell, a metal filter screen, an air inlet hole, a first filter, a double-layer organic filter screen, a second filter, a welding base, shaft bases, a ceramic electrode chip and a lead column, the second filter is arranged at the bottom end of the double-layer organic filter screen, and the welding base is fixedly connected to the top end of the supporting base; four shaft bases are fixedly mounted in the welding base; the methane sensor is simple in structure, the preparation process is simple, the heating resistor of the ceramic electrode plate applied to the methane sensor can be accurately controlled, the working voltage and current of the ceramic electrode plate can be designed and manufactured in batches according to application scene requirements, the ceramic electrode adopts semi-mechanical welding, the welding efficiency is high, the welding cost is low, meanwhile, a rapid standard packaging process is adopted, and the detection part of the sensor is accommodated in a standard TO-5 metal package, so that the sensor is small in size, low in power consumption, high in use sensitivity, long in service life, low in cost and simple in application circuit.

Description

Technical field [0001] The present invention relates to a methane sensor, and particularly relates to a novel methane sensor, belongs to the technical field of the sensor. Background technique [0002] Coal mine methane sensor for detecting the safety system of coal mine, mining face, goaf, return air tunnel, etc. Electromechanical caverns continuous monitoring the concentration of methane, the methane concentration when the gauge, can automatically send audible and visual alarms, for coal mine workers, methane testing personnel, management personnel underground portable use, stationary use but also for the above-described properties, the catalytic element is generally used to detect the carrier element. Generating a proportional content of methane weak signal, after the multi-stage amplification circuit generates an output signal, into the microcontroller chip A / D conversion input port, this analog signal into a digital signal, then the microcontroller for this signal processi...

AI Technical Summary

Problems solved by technology

[0003] The structure of existing methane sensors is complex, the preparation process is simple and streamlined, the packaging process of ceramic electrode sheets is different, and the resistance of ceramic electrode sheets cannot be precisely controlled

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