In order to realize the automatic storage of pulse count,display of historical data and reduce the workload of scaler users,a scaler based on virtual instrument technology is designed.The virtual scaler directly calls the counter of acquisition card through Lab VIEW,which solves the problem of low analog sampling rate.The function design of virtual scaler focuses on counting data stream,which can effectively avoid the confusion of function logic.The automatic storage of count value and automatic continuous measurement without experimenter on duty are realized.At the same time,the hardware open...