Small-signal processing circuit for micro-resistivity scanning imaging

The invention discloses a small-signal processing circuit for micro-resistivity scanning imaging. The small-signal processing circuit comprises a signal acquisition module and a differential amplification module. The signal acquisition module and the differential amplification module are connected i...

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Bibliographische Detailangaben
Hauptverfasser:	WANG ZHIYONG, HAN MINGMING, WANG HAIJUN, SI YUN, YU CHUNLEI, LI DONGSHENG, SUN YANHAI, ZHANG HONGYUAN, MA YONGNAN, HE YANHAI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DETECTING MASSES OR OBJECTS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASURING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	The invention discloses a small-signal processing circuit for micro-resistivity scanning imaging. The small-signal processing circuit comprises a signal acquisition module and a differential amplification module. The signal acquisition module and the differential amplification module are connected in series. The signal acquisition module is used for collecting electrode signals and filtering the electrode signals. The differential amplification module is used for conducting secondary filtration and amplification on the filtered electrode signals and outputting the voltage value of the processed electrode signals. According to the small-signal processing circuit for micro-resistivity scanning imaging, a shielding device is additionally arranged in the circuit, a differential circuit is used for filtering noise doped in small-signal voltages to obtain clean small-signal voltages, and then the accurate voltage difference between two points in a stratum can be measured.