Based on the characteristic and composition technology of Virtual Instruments (VI), the paper probes into the development of VI technology, and recommends the technology application in the function test of farm vehicle.

• 以虚拟仪器的特点及构成技术为基础,探讨了虚拟仪器技术的发展情况,并介绍了这项技术在拖机性能测试中的应用,构建出在农用车辆性能测试中可替代某些现有测试仪器的虚拟仪器。