The sampling system of the sweeping frequency signal is the important part of the piezo-electro micro gyroscope suspended system. The principle and the structure of the multifunction data acquisition module DAQ

NI PXIe—6124

and its role in forming the sweep frequency signal system of the piezoelectricity micro gyroscope are introduced here. Since the module features high sampling speed（ 4 MS/s per channel） and high accuracy（ 16 bits of resolution）

the NI-based system is designed to precisely sample the induction oscillation signals of the gyroscope in different frequency and then send to the computer so as to gain the resonance mode. In the actual test

the high accuracy oscillation signals

which generated from DDS circuit are successfully sent to the DAQ

and a series of oscillation data is completely processed.