Vehicle-mounted power supply control system

Abstract

The invention relates to driver actual road test equipment, in particular to a vehicle-mounted power supply control system. The vehicle-mounted power supply control system is characterized by comprising an automotive relay, a power supply isolation module, a current sensor, an industrial personal computer, an analog / digital (AD) conversion circuit, a bleeder circuit, a micro-programmed control unit (MCU) and a drive control circuit. 12V input voltage enters the power supply isolation module after passing through the automotive relay; one output of the power supply isolation module is used for supply power for vehicle-mounted equipment; the other output of the power supply isolation module is connected to the power supply input end of the industrial personal computer through the current sensor; a voltage signal is output to the AD conversion circuit for conversion by the current sensor and then is sent to the MCU; an uninterrupted identification data packet sent outside by a CC3 serial port of the industrial personal computer is output to the MCU after being converted into a standard transistor-transistor logic (TTL) signal by the bleeder circuit; and a control signal is input into the drive control module by the MCU so as to turn on or off the automotive relay to power on or off the equipment.

Description

technical field [0001] The invention relates to the actual road test equipment for drivers, in particular to a vehicle-mounted power supply control system. Background technique [0002] At present, during the actual road test of the driver in China, the power supply equipment needs to be used to supply power to the subject three equipment. After the test is over, the industrial computer needs to be softly shut down, and the main switch will be turned off after the computer is completely shut down. During this period, there will be a delay of 20 seconds or even 2 minutes. Many instructors or candidates for training ignore or forget to turn off the main switch, so that other equipment is in normal operation, which consumes the power of the car battery, seriously causing the first Two days later, the car could not be ignited normally. Contents of the invention [0003] In order to overcome the defects of the prior art, the present invention provides a vehicle-mounted power s...

AI Technical Summary

Problems solved by technology

During this period, there will be a delay of 20 seconds or even 2 minutes. Many instructors or candidates for training ignore or forget to turn off the main switch, so that other equipment is in normal operation, which consumes the power of the car battery, seriously causing the first The car can't start normally for two days

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