The development of transmission error dynamic measurement system based on time grating displacement sensors

Optical gratings are applied to traditional transmission error dynamic measurement system as angle detecting sensors, but high-precision optical gratings are expensive and imported restrictedly.In view of this situation, a time grating, the novel displacement sensor of proprietary intellectual property rights, is invented. Absolute displacement signal of time grating is converted into incremental pulse signal with time series models. and the experiment results prove that accuracy of measurement can achieve 0.137% by using sophisticated FMT test transmission error of gear-hobbing machine, so the desired schematic design has been obtained.