Nuclear magnetic resonance and transient electromagnetic combination instrument and work method

• Main Authors: WANG YING, CHEN WUQIANG, QU YONGXING, LIN TINGTING, LYU XIAOFENG, WAN LING
• Format: Patent
• Language: English
• Published: 14.01.2015
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention relates to a nuclear magnetic resonance and transient electromagnetic combination instrument and a work method. According to the nuclear magnetic resonance and transient electromagnetic combination instrument, a computer is connected with an SQUID sensor through a signal collection card and a signal conditioning circuit, the computer is connected with a 24V storage battery through an MCU, a CPLD signal generation module and a power module, the power module is connected with the signal conditioning circuit through an emitting circuit and an optocoupler, the CPLD signal generation module is connected with an energy quick consumption circuit through the emitting circuit and an emitting coil, and the MCU is connected with an E2PROM, the optocoupler and the signal conditioning circuit. The work method comprises the steps that a transient electromagnetic detection mode is selected, the SQUID sensor is used for receiving transient electromagnetic signals, and measuring point apparent resistivity distribution is obtained; a nuclear magnetic resonance detection mode is executed in a switched mode, the SQUID sensor is used for receiving nuclear magnetic resonance signals, and measuring point contained underground water distribution is obtained. The apparent resistivity distribution and the underground water distribution are detected by one set of equipment, the advantages of two instruments are achieved, the SQUID sensor is adopted to improve detection precision, the signal-to-noise ratio of the received signals is effectively improved, and meanwhile the problem that a receiving coil is inconvenient to carry outdoors is solved.