Method for extracting vehicle state information from center

Abstract

The invention relates to a method for extracting vehicle state information from a center, and relates to the method for dynamically collecting vehicle information; the operation comprises a step of indicating a target net frame, a step of receiving the target net frame and a step of canceling the target net frame. In the step of receiving the target net frame, a vehicle terminal receives a net frame sent by any electronic control unit and checks self set files, if a frame identification code of the received net frame is recorded, then according to a digit, with digit value being 1, from corresponding mask codes, bytes with same series number are extracted from a net frame data segment; the bytes are then assembled in sequence to form a new data segment, the new data segment and the frame identification code of the net frame are compiled to form the target net frame sent to a central processing server by a wireless network; if the frame identification code is not recorded, then the net frame is discarded. The central processing server receives the target net frame, searches a bitmap and a mask code corresponding to the net frame according to the frame identification code, and the vehicle concerned state information can be extracted from the data segment of the target net frame according to the bitmap and the mask code; the state information can be stored and processed, and communication quantity can be reduced.

Description

technical field [0001] The invention relates to a method for dynamically collecting vehicle information. Background technique [0002] With the popularization of intelligent control technology, new cars are equipped with multiple electronic control units (hereinafter referred to as ECUs) to control the satellite positioning (GPS), engine, gearbox, steering system, hydraulic brake system, fuel supply system, etc. Different parts implement data acquisition and real-time control; and set up the vehicle-mounted signal acquisition terminal (hereinafter referred to as vehicle-mounted terminal) to collect the data sent by these ECUs through the controller area network (hereinafter referred to as CAN). Each ECU transmits data on the CAN with a controller area network data frame of a specified format (hereinafter referred to as the network frame) according to the regulations of CAN; and each ECU sends a variety of different network frames on the CAN to transmit different status data ...

AI Technical Summary

Problems solved by technology

[0004] 1. High requirements on the data storage capacity of the central processing server;

[0005] 2. During wireless network transmission, bandwidth is seriously wasted;

[0006] 3. Due to the large amount of data that the central processing server needs to process, the processing efficiency of the system is reduced

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