Data Acquisition and Processing Part of Accelerometers Self-calibration Unit Based on V/F Convertor

The accelerometers self-calibrated unit combining accelerometers with calibration equipment is a new inertial unit and the high precision rotation and lock mechanism is used to identify the model parameters of the accelerometers with the method of varied positions rotations in gravity field.High precision of data acquisition of accelerometers signal is achieved with V/F convertors.V/F convertors convert accelerometers analog signal into impulse which is transmitted to FPGA and converted digital signal.Digital filter is used in MCU to effectively reduce noises in the digital signal.The experiment testifies that the data acquisition system based on V/F convertors can provide high precision data with low noises for the computation of the accelerometers self-calibration,which ensures high precision of the accelerometers self-calibration from the data source.