Research of High-precision Virtual Instrument Test Platform for Linear Displacement Sensor

High-precision virtual instrument acquisition platform of linear displacement sensor is an instrument that has standard interface. It helps to insert different displacement sensor into the platform. It is framed into high precision, integrated, modular and testing various types of displacement sensor system. The platform utilizes the virtual instrument technology which is assembled by high speed computer, data collection system and software. The platform can provide standard interface for different types of linear displacement sensor, identify the sensor type, collect data and process data automatically. Therefore, it becomes a part of displacement sensor calibration system. Intelligent acquisition platform of linear displacement sensor is a part of displacement measuring system, but it is also a part of displacement sensor calibration system. So, the influence of platform accuracy must he ignored. From the theoretical analysis and experimental verification, we can see that the uncertainty component of platform is 0.033%, the uncertainty is less than 1/3 of secondary instrument.