How to treat the dynamic data flow of automobiles?

When analyzing data streams, we should consider three aspects:

1. Considering the working value of the sensor, it is necessary to analyze its response speed.

2. The data response and corresponding speed between electronic control components should be considered. In the electronic control system, the data of each sensor or actuator will affect each other, because the electronic control system must output a corresponding instruction after receiving an input signal, and these parameters must be linked for analysis when analyzing faults.

3. The relationship between several related sensor signals should be considered. When the relationship between them is found unreasonable, the electronic control self-diagnosis system will give one or several fault codes. At this time, it is not easy to judge that a sensor is defective, and further analysis is needed according to the relationship between them to draw a correct conclusion.

Extended data:

1, data flow introduction

Automobile data flow refers to the data parameters exchanged between electronic control unit (ECU), sensors and actuators, which are read by special diagnostic instrument through diagnostic interface and change with time and working conditions. Data transmission is like queuing, one by one through the data line to the diagnostic instrument.

2. The function of data flow

The data stream stored in the electronic control unit (ECU) of automobile truly reflects the working voltage and state of each sensor and actuator, which provides a basis for automobile fault diagnosis. The data stream can only be read by special diagnostic instruments. Automobile data stream can be used as the input and output data of automobile ECU, so that maintenance personnel can know the working condition of automobile at any time and diagnose the fault of automobile in time.

Reading the automobile data stream can detect the working state of each sensor of the automobile and the working state of the automobile, and can also set the driving data of the automobile through the data stream.

References:

Phoenix Net-Teach you how to read the car data stream.