Shallow seismograph based on virtual instrument technology

The shallow seismograph is the main instruments of engineering geophysics explorer. But its key technique lies in how to resolve the problem of the large dynamic scope of signal measurement. Currently the domestic and international instrument company have two kinds of essential techniques to resolves this problem, one is to have a kind of float -amplify electric circuit technique, another is 24A/Ds technique, but these technique had some shortcomings. This design is applied Virtual Instrument technique based on LabVIEW to solve these problems, and try to use 16 A/Ds DAQmx technique of LabVIEW and Automatic Gain Control Electric Circuit(AGC), succeeding to design a kind of seismograph which is cheaper and have large dynamic scope of signal measurement. The key meaning of this design lies in combining the Virtual Instrument technique and geophysics technique, so founding the new way to design geophysics instrument.