Combustible gas detector control circuit capable of resisting electromagnetic interference

By incorporating electronic circuit protection measures such as TVS diodes, common-mode inductors, and diodes into the control circuit of combustible gas detectors, the problem of insufficient electromagnetic interference resistance of combustible gas detectors is solved, achieving stable and reliable gas concentration detection and adaptability to complex environments.

CN224066786UActive Publication Date: 2026-03-31深圳怡风电子有限公司
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Patent Information

Application Number
CN202520532393.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-25
Publication Date
2026-03-31
Estimated Expiration
2035-03-25

AI Technical Summary

Technical Problem

Existing combustible gas detectors have poor resistance to electromagnetic interference when used alone, making them prone to malfunctions, which can lead to irregular fluctuations in concentration values ​​and false alarms.

Method used

Multiple electronic circuit protection measures are adopted, including the use of TVS diodes, common-mode inductors, and diodes in the power supply voltage adjustment circuit, sensor voltage adjustment circuit, gas detector main control circuit, and 485 communication circuit to enhance electromagnetic interference resistance.

Benefits of technology

It improves the electromagnetic interference resistance and stability of combustible gas detectors when used alone, ensuring real-time and accurate detection of combustible gas concentration, adapting to complex interference environments, and enhancing user experience.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model provides a combustible gas detector control circuit capable of resisting electromagnetic interference, which comprises a power supply voltage regulation circuit, a temperature signal acquisition circuit, a sensor voltage regulation circuit, a sensor acquisition control circuit and a gas detector main control circuit which are in power supply connection. The gas detector main control circuit is in control connection with the 485 communication circuit, the acousto-optic prompt circuit, the LED state display circuit and the digital display screen, the gas detector main control circuit is in communication connection with the sensor acquisition control circuit, and the sensor acquisition control circuit is in control connection with the gas signal acquisition circuit and the temperature signal acquisition circuit. A TVS (Transient Voltage Suppressor) tube, a common mode inductor and a diode are arranged in the power supply voltage adjusting circuit; and a TVS tube and a diode are also arranged in the gas detector main control circuit. The combustible gas detector has the beneficial effects that the anti-electromagnetic interference capability, the reliability and the stability of the combustible gas detector when the combustible gas detector is independently used are greatly improved.
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