Experimental measurement system based on CAN bus

In order to achieve the data acquisition and resource sharing of laboratory equipments, a data acquisition system based on CAN bus is constituted. In this paper, acquisition interface circuit of each module is designed, and CANopen is used as the application layer protocol on the basis of CAN protocol. The communication between host computer and slave computer can be realized based on C kernel programming and LabVIEW interface. The data acquisition and communication of different equipments are implemented, including electronic scale, ultrasonic ranging module, compass module, infrared thermometer module and encoder. The integration of the system control and resource sharing are achieved through the remote control.