Automatic lights-out protecting system for automobile

Abstract

An automatic lights-out protecting system for an automobile comprises an automobile light state sensing circuit, an igniting switch signal circuit and an automatic lights-out control circuit, whereinthe automobile light state sensing circuit comprises a double-voltage comparator U1A, an adjustable resistor R1, and a light-sensitive diode L1 which is mounted at an automobile light; the igniting switch signal circuit comprises a nor gate U2A and a triode Q1; and the automatic lights-out control circuit comprises a relay K1 and a relay K2. According to the system, the automobile light state is monitored through the light-sensitive diode, an igniting switch signal is provided, and thus the connection of the triode can be controlled through a gate circuit; the automobile light is controlled and automatically turned off through the relays, and a simple logic control circuit formed through an electrical element can be adopted to achieve the purpose, and thus the problem that a driver forgetsto turn off the automobile light after flameout of the automobile and the electricity of a storage battery is completely consumed can be avoided; the system is simple in structure, good in effect, stable in performance, and low in cost; in addition, the igniting switch signal and a sensing signal of the light-sensitive diode realize interlocking, so that the normal use of the light of the automobile in normal running is not influenced.

Description

technical field [0001] The invention relates to the technical field of automobile light control, in particular to an automobile automatic light-off protection system. Background technique [0002] In real life, it often happens that the driver forgets to turn off the lights after parking. The lights will not only affect pedestrians, but also a waste of energy. If the time is too long, the battery energy will be exhausted, which will damage the vehicle. At present, the domestic car light controller mainly uses two methods to solve the above situation: one is to monitor the lights, ignition switch, door lock and other devices, and transmit the monitoring signal to the controller. When the controller judges that the driver left the car without turning off the lights, it will start the alarm system and prompt the driver to turn off the lights; the other is to process the collected signals of lights, ignition switch, door locks, etc. Automatic control, to achieve the purpose of ...

AI Technical Summary

Problems solved by technology

[0003] 1. The first type of method is to remind the driver to turn off the lights by calling the police, but instead of turning off the lights directly, the driver needs to perform the light off operation, which is not simple enough and cannot achieve the automatic effect;

[0004] 2. The second type of method uses a single-chip microcomputer to realize automatic control. The single-chip microcomputer has a complex structure and high cost, which is not conducive to popularization.

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