Communication processing method of speed signals in vehicle-mounted network system

Abstract

The invention discloses a communication processing method of speed signals in a vehicle-mounted network system, which comprises the following steps that: (1) all the speed signals are received, and whether the speed signals of a hybrid control unit (HCU) are received and effective is judged; (2) whether the speed signals of an interface control unit (ICU) are received and are effective is judged; (3) Whether the speed signals of an interface control unit (ICU) are received and are effective is judged; (4) whether the speed signals of an anti-lock braking system (ABS) are received and are effective is judged; (5) the speed signals of gateways are sent to all sub-systems; (6) the speed signals of hard wires are provided; and (7) electronic control units (ECUs) receive the speed signals of the gateways or the hard wires. The communication processing method of the speed signals in the vehicle-mounted network system forwards the speed signals to the ECUs for use based on the priority according to the accuracy and the reliability of the speed signals, and processes the speed signals more carefully; and when the speed signals of the gateways are ineffective, some ECUs can alternatively select the speed signals of the hard wires, so that the reliability of the vehicle-mounted network system is ensured, the gateways are applicable to vehicles with traditional energy and novel energy hybrid power, and the universality and the platform performance of the gateways are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle signal communication processing, and in particular relates to a communication processing method of a vehicle speed signal in a vehicle network system. Background technique [0002] With the development of automotive electronics technology, the number of ECUs (Electronic Control Units) in automobiles is also increasing, and the vehicle network system is divided into more and more subsystems, which are becoming more and more complex. For example: the current traditional vehicle network system is often used Divided into: LIN (Local Internet) network system, body CAN (Controller Area Network) network system and power CAN network system; in addition, the vehicle network system in the new energy vehicle also includes the new energy CAN network system. With the increase of in-vehicle network subsystems and the increasing amount of information that needs to be exchanged between each network subsystem, the...

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Problems solved by technology

[0004] The Chinese patent with the application number 201010595179.1 discloses a processing method of vehicle speed signals. The method performs priority processing and forwarding of the vehicle speed signals provided by each subsystem in the vehicle network system to realize system-related control; however, the processing method collects the vehicle speed signals There are fewer sources, and the selection is simpler. Once the vehicle speed signal cannot be provided by any source, this method will directly declare that the vehicle speed signal of the gateway is invalid, and then the system-related control cannot be realized. At the same time, this method is only limited to the speed signal processing of traditional power vehicles.

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