Household combustible gas detector with index curve correction function

Abstract

The invention relates to the technical field of fire alarm, in particular to a household combustible gas detector with an index curve correction function, which can improve the detection precision andensure the communication effect, a CPU module comprises a single chip microcomputer U1, the single chip microcomputer U1 is in electric control connection with a calibration signal processing circuitand a bus communication circuit, the bus communication circuit comprises an optocoupler U4, a first pin of the optocoupler U4 is connected with a 3.3 V power supply, a second pin of the optocoupler U4 is connected with a 42 pin of the single-chip microcomputer U1 through a resistor R37, a fourth pin of the optocoupler U4 is connected with a DC + direct-current power supply, and a third pin of theoptocoupler U4 is connected with one end of a resistor R30. The other end of the resistor R30 is connected with a base electrode of a triode Q3 and one end of a resistor R31, and a third pin of the triode Q3 is connected with one end of a resistor R29. The other end of the resistor R29 is connected with one end of a resistor R33, an anode of a diode D9 and a pin 3 of a common-cathode diode D7; apin 2 of the common-cathode diode D7 is connected with a pin 1 of a common-anode diode D8, one end of a capacitor C28, one end of a common-cathode voltage-regulator tube D6 and one end of a resistor R27; and a pin 1 of the common cathode diode D7 is connected with a pin 2 of the common anode diode D8, one end of the capacitor C29, one end of the resistor R28 and the other end of the common cathodevoltage stabilizing tube D6.

Description

technical field [0001] The invention relates to the field of fire alarm technology, in particular to a household combustible gas detector with an exponential curve correction function. Background technique [0002] Household combustible gas detectors are used in kitchens, bathrooms and other occasions where gas appliances are used in ordinary families. It can effectively detect the combustible gas content in the environment, prevent explosion accidents caused by gas leakage, and enhance the safety of using gas appliances. However, due to the unreasonable circuit layout of the existing traditional combustible gas detectors, it is easy to generate false alarms or the deviation of the alarm threshold is too large, and the communication is easily disturbed, and the long-distance communication is very unreliable, which affects the remote fire alarm effect. Contents of the invention [0003] In order to solve the existing problems of low detection accuracy and poor communication...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the existing problems of low detection accuracy and poor communication effect, the present invention provides a household combustible gas detector with exponential curve correction function, which can improve detection accuracy and ensure communication effect

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