The theory and methods about belt driven test are introduced by means of virtual instrument technology.The belt-driven test system based Lab VIEW is developed

which is composed of mechanism

data collection device

DC PWM system

electromagnetic brake

photo electricity velocity measuring sensor and pressure sensor.In the system

the test of various parameters including rotate speed of belt pulley

output power

Elastic slide rate and drive efficiency are automatically realized.Based on the virtual instrument technology

a humanized human-computer interface is designed.Experiments explain that the system owns high real-time performance and dependability

and that it has a good application prospect.