An IQ demodulation device and method for a while-drilling electromagnetic wave resistivity instrument
By improving the IQ demodulation device of the drilling electromagnetic resistivity instrument, the radio frequency signal is converted into a DC IQ signal and filtered, which solves the problems of noise interference and high system complexity in traditional instruments, and realizes efficient and accurate signal acquisition and measurement.
Patent Information
- Application Number
- CN202610351759.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-22
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional electromagnetic resistivity instruments used in drilling suffer from problems such as high noise interference, high system complexity, and poor anti-interference ability during signal processing, which affect the accuracy and stability of signal acquisition.
A demodulation device comprising a first single-ended to differential circuit, an IQ modulation and demodulation circuit, a frequency multiplier circuit, a second single-ended to differential circuit, a low-pass filter conditioning circuit, and an ADC acquisition module is used to improve the signal-to-noise ratio and signal acquisition efficiency by converting the radio frequency signal into a DC IQ signal and performing filtering processing.
It achieves simple hardware circuitry, high signal-to-noise ratio, and accurate signal acquisition, improving the reliability and adaptability of the drilling electromagnetic resistivity instrument and solving the problems of signal accuracy and stability.
Smart Images
Figure CN122420069A_ABST