针对核磁共振找水仪在实际应用过程中存在着电感测量不精确导致的难以获得最佳谐振信号的问题，基于串联谐振最佳谐振点电流最大的原理，设计了扫频式电感测量仪器。信号发生器产生的扫频方波信号经过驱动板和IGB T及配谐电容加到电感线圈上，用霍尔电流传感器采集出最大电流以及最大电流时刻信号源产生的信号频率，以此精确地计算出电感值，利用此方法设计一种扫频式电感测量仪以匹配找水仪，从而获得最佳谐振核磁共振找水信号。%It is difficult to get a best resonant signal in the actual application process of water detectors ,which is caused by inaccuracte inductance measurement .In this paper ,based on the optimum resonance point current maximum principle of series resonance ,a sweep inductance measuring instruments is designed .The square wave signals generated by a sweep signal generator go through the drive plate and the IGBT with harmonic capacitance ,and access to the inductor coil ,and the maximum current and the signal generation frequency are acquired by Hall current sensor ,so the inductance value can be computed accurately .This method is applied to the design of a sweep‐type inductance meter to match the water detector ,in order to get the best nuclear magnetic resonance signal .
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