Start method for vehicle carried alcohol sensor automatic control automobile and its controller
A technology of alcohol sensor and control device, which is applied to the safety devices of the power plant control mechanism, tractors, motor vehicles, etc., which can solve the problems of personal life and property loss, high missed detection rate, and impact on traffic, etc., to save manpower, Full-featured and ingenious effects
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[0022] Alcohol sensor (called probe usually) MQ is placed in the car among the present invention, and it can convert the alcohol concentration in the driver's exhalation into electric signal, in figure 1 The output signal of the middle alcohol sensor MQ passes through the potentiometer R at point P 7 , resistance R 3 It is sent to the ADCO port of the microprocessor IC. When it is normal, the potential of point P of the non-alcoholic signal is 1, and the PDS of the microprocessor IC (T 1 ) terminal outputs a low potential, the switching transistor Q3 is in the cut-off state, no current passes through the relay J coil, and the normally closed contact of its contact K is connected in series to the automobile ignition coil power supply circuit, and the automobile can be started normally. When the driver's alcohol content exceeds a certain standard, after the alcohol sensor MQ is converted into an electrical signal, the potential of point P decreases. After this pulse signal is s...
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