Vehicle detection terminal, system and method

Abstract

The invention discloses a vehicle detection terminal which comprises a micro-control unit, a voltage converter, a CAN (Controller Area Network) bus and an automatic sleep circuit. The automatic sleep circuit is electrically connected with a vehicle battery power supply, the micro-control unit and the voltage converter and comprises a voltage division circuit and a voltage comparator. The invention also provides a vehicle detection system which comprises a server, a handheld mobile terminal and the vehicle detection terminal. The vehicle detection terminal comprises a bluetooth module. The invention also provides a vehicle detection method which comprises the following steps of: adopting a vehicle detection terminal automatic sleep method and carrying out voltage division on a voltage input by the vehicle battery power supply; comparing the voltage obtained after voltage division with a preset voltage threshold value; if the voltage obtained after voltage division is lower than the preset voltage threshold value, judging that a vehicle is flamed out, and if the voltage obtained after voltage division is higher than the preset voltage threshold value, judging that the vehicle is not flamed out; and when judging that the vehicle is flamed out and a control signal enters a sleep state, ensuring the vehicle detection terminal to enter a sleep state.

Description

technical field [0001] The invention relates to the technical field of vehicle detection, in particular to a vehicle detection terminal, system and method. Background technique [0002] On-Board Diagnostics (OBD) monitors whether the exhaust gas of the car exceeds the standard at any time from the operating status of the engine. Once it exceeds the standard, it will immediately issue a warning. When the system fails, the fault light or the check engine warning light will be on, and the powertrain control module will store the fault information in the memory, and the fault code can be read from it through a certain program. According to the prompt of the fault code, the maintenance personnel can quickly and accurately determine the nature and location of the fault. [0003] The existing vehicle detection terminal is an important part of the vehicle automatic diagnosis system, which is divided into the following modules: voltage conversion module, Micro Control Unit (MCU), Bl...

AI Technical Summary

Problems solved by technology

[0006] At present, the automobile detection terminal equipment on the market basically regards the ignition voltage of the automobile as the judgment standard for the startup and shutdown of the automobile. Although it can also realize the judgment of the shutdown and startup of the automobile, it needs to be installed with broken wires Open, re-install new lines, causing damage to the original car, and broken lines of the car may easily lead to leakage, wire corrosion and other phenomena, affecting the safety of use and service life

[0007] To sum up, the automobile detection terminal in the prior art has the technical defect of needing broken wire installation

Images