Vehicle-mounted multi-channel data acquisition system

The invention belongs to the technical field of electronic application, and discloses a design method of a vehicle-mounted multi-channel data acquisition system. The invention mainly solves the problems of how to perform data acquisition and how to perform multi-path data acquisition, and sends the acquired data to the PC for real-time display. A small vehicle-mounted data acquisition system is formed by simulating the rotating speed, the accelerator opening degree, the temperature and other important quantities in a vehicle-mounted environment and extracting the rotating speed, the accelerator opening degree, the temperature and other important quantities in a voltage-current mode and other modes, wherein the rotating speed is simulated through a motor, the opening degree of an accelerator can be equivalently converted through variable voltage, and other important operation quantities can be equivalently converted through voltage variation. Thus, the quantity which can be collected onthe automobile is formed