Patent ID: 11953635
Assignee: INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The seismometer with high sensitivity, broadband and all-dip according to claim 4, wherein a calculation process of the feedback parameters of the seismometer is as follows:
A1. the coil driver is used to receive analog signals from the D/A converter, and the feedback coil is controlled through the analog signals to excite a specific frequency vibration signal;
A2. the vibration signal is transmitted to the feedback calculation unit through the dynamic coil sensor, the preamplifier, and the A/D converter in sequence;
A3. the frequency characteristic response of the collected signal and the excited vibration signal is calculated by the feedback calculation unit to extract the difference response curve;
A4. according to the difference response curve, parameters g′p g′i g′p of the current seismometer are calculated by using a frequency calibration equation;
A5. based on the parameters g′p g′i g′p, the feedback coil is reused as a signal generator and obtain a frequency band of current signal;
A6. according to a difference between a current signal frequency band and a standard frequency band, a frequency band drift value of the current seismometer is obtained;
A7. based on the frequency band drift value, the feedback parameters gp, gi and gd of the seismometer are obtained through inverse inference based on interpolation results.