Anti-disassembly device of vehicle-mounted terminal on basis of CAN (controller area network) bus and anti-disassembly method thereof

Abstract

The invention relates to an anti-disassembly device of a vehicle-mounted terminal and an anti-disassembly method, in particular to a method for preventing the vehicle-mounted terminal from being disassembled maliciously by maintaining heartbeat communication between the vehicle-mounted terminal and a vehicle engine ECU (electronic control unit) on the basis of a CAN (controller area network) bus. The anti-disassembly device comprises a vehicle-mounted terminal main machine and the engine ECU, wherein the vehicle-mounted terminal main machine is installed in a driving cab of a vehicle and comprises a power supply, an ARM processor and a CAN transceiver of a controller local network. The anti-disassembly method comprises the following steps that: the CAN transceiver of the vehicle-mounted terminal main machine sends a heartbeat frame of the engine ECU, if the heartbeat frame can be received normally, the engine works normally; if the vehicle-mounted terminal main machine is disassembled illegally, the communication between the ECU and the vehicle-mounted terminal is interrupted, and the rotating speed of the engine is limited; if the vehicle-mounted terminal main machine is disassembled in a starting state, the rotating speed is limited after delay; and if the vehicle-mounted terminal main machine is disassembled in a flameout state, when in restarting, the rotating speed is limited after delayed time.

Description

technical field [0001] The present invention relates to an anti-dismantle device and an anti-dismantle method for a vehicle-mounted terminal, in particular to a technology based on CAN bus, which prevents the vehicle-mounted terminal from being maliciously method of dismantling. Background technique [0002] With the continuous development of the Internet of Vehicles, financial departments and vehicle leasing companies that provide financing and loans for vehicles can manage loans and lease vehicles more and more conveniently through vehicle-mounted terminals. However, due to bad intentions of some vehicle users, they maliciously dismantled the vehicle terminal, causing its functions to fail to work normally. [0003] The currently widely used anti-dismantlement method for vehicle-mounted terminals is the wire harness anti-dismantlement method, that is, by connecting the vehicle-mounted terminal in series with the starting circuit of the vehicle, when the power supply funct...

AI Technical Summary

Problems solved by technology

However, for drivers who are a little familiar with vehicle electrical knowledge, this kind of anti-dismantlement method based on physical means is easy to eliminate by reconnecting the wiring harness.

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