Design of high speed multi-channel data acquisition system

Based on complex programmable logic device(CPLD) and USB network dynamic interfaces,the high speed multi-channel and high precision data acquisition system is designed.It takes CPLD as the master control system,uses the USB configuration tag identification channel dynamically to increase or decrease the network interface,and sets up electronic components to design the collection control core circuit. CPLD control and the sequence of the parts in the data acquisition and transmission are analyzed in detail. The method to dynamically increase or decrease the USB network channel interface is given. The detect speed can reach 80 km/h,high speed data acquisition detection can carried out in 6 channels at the same time, and the data collected from each channel can displayed on the same screen simultaneously.