公开(公告)号：US5796253A

公开(公告)日：1998-08-18

申请号：US657454

申请日：1996-05-29

申请人： Miro Bosnar ,  J. Duncan McNeill

发明人： Miro Bosnar ,  J. Duncan McNeill

IPC分类号： G01V3/165 ,  G01V3/10 ,  G01V3/16

CPC分类号： G01V3/165

摘要： In a time domain electromagnetic mapping technique of the type using transmitter pulses of half-sinusoidal waveform, with the half sinusoids being segments of a sinusoidal waveform having a frequency and corresponding to a resonant frequency of the transmitter coil, an improved current fall time at the end of each pulse is obtained by forming each transmitter pulse of plural immediately successive half sinusoids, the transmitter coil being tuned to an appropriately increased resonant frequency relative to the pulse repetition rate. Circuits for generating the improved pulse waveforms are disclosed.

摘要翻译： 在使用半正弦波形的发射机脉冲的类型的时域电磁映射技术中，半正弦曲线是具有频率并且对应于发射机线圈的谐振频率的正弦波形的段，改善的电流下降时间 通过形成多个紧随连续的半正弦波的每个发射器脉冲来获得每个脉冲的结束，发射器线圈被调谐到相对于脉冲重复频率适当增加的谐振频率。 公开了用于产生改善的脉冲波形的电路。

公开(公告)号：US06326791B1

公开(公告)日：2001-12-04

申请号：US09314108

申请日：1999-05-19

申请人： Miro Bosnar

发明人： Miro Bosnar

IPC分类号： G01V311

CPC分类号： G01V3/104

摘要： A method is disclosed for discriminating electromagnetic responses of metallic objects in soil to application of an electromagnetic pulse from superposed responses due to magnetic susceptibility of the soil, comprising substantially eliminating, from at least a portion of the response, any component having a power law decay characteristic with an exponent which is characteristic of the soil.

摘要翻译： 公开了一种用于区分土壤中金属物体的电磁响应的方法，以便由于土壤的磁化率而施加电磁脉冲与叠加的响应，包括从至少一部分响应中消除具有幂律衰减的任何部件 特征是土壤特征的指数。

公开(公告)号：US06501276B1

公开(公告)日：2002-12-31

申请号：US09136319

申请日：1998-08-18

申请人： Miro Bosnar

发明人： Miro Bosnar

IPC分类号： G01V310

CPC分类号： G01V3/165

摘要： A frequency domain electromagnetic geophysical mapping instrument has a transmitter, a transmitter coil connected to the transmitter, the transmitter generating current pulse waveforms formed by half-sinusoidal output waveform segments of a waveform having a frequency equal to a resonant frequency of the transmitter coil, and a receiver, in which the transmitter generates current pulses including pulses comprising a plurality of immediately successive half-sinusoidal waveform segments of common polarity. The pulses immediately succeed each other and are of alternating polarity. The pulse lengths may in this case be equal, or vary in a manner providing a desired output spectrum, for example according to a pseudo-random sequence.

摘要翻译： 频域电磁地球物理映射仪具有发射机，与发射机相连的发射机线圈，发射机产生由具有等于发射机线圈的谐振频率的频率的波形的半正弦输出波形段形成的电流脉冲波形，以及 接收器，其中发射器产生包括具有共同极性的多个紧邻连续的半正弦波形段的脉冲的电流脉冲。 脉冲立即成功，交替极性。 在这种情况下，脉冲长度可以相等，或者以提供期望的输出光谱的方式变化，例如根据伪随机序列。