公开(公告)号：US06534985B2

公开(公告)日：2003-03-18

申请号：US09736406

申请日：2000-12-15

申请人： John Scott Holladay, III ,  James Leonard Corbett Lee

发明人： John Scott Holladay, III ,  James Leonard Corbett Lee

IPC分类号： G01V310

CPC分类号： G01V3/104

摘要： An electromagnetic sensing apparatus which has an electromagnetic transmitter, at least one receiver device, at least one calibration device, a switch and a processor. The transmitter generates a transmitter signal. The receiver device is spaced from the transmitter, senses an electromagnetic field proximate thereto and generates a receiver signal. The calibration device senses an electromagnetic field proximate thereto and generates a calibration signal. The calibration device is positioned such that the distance between the transmitter and the receiver device is greater than the distance between the transmitter and the calibration device. The switch is connected between the receiver device and the calibration device. The processor includes a first input for receiving a signal from one of the at least one receiver device and the calibration device and a second input for receiving a signal from the switch and compares the first input and second input and monitors distortions in the transmitter signal.

摘要翻译： 一种具有电磁发射器，至少一个接收器装置，至少一个校准装置，开关和处理器的电磁感测装置。 发射机产生发射机信号。 接收机设备与发射机间隔开，感测靠近其的电磁场并产生接收机信号。 校准装置感测靠近其的电磁场并产生校准信号。 校准装置被定位成使得发射器和接收器装置之间的距离大于发射器和校准装置之间的距离。 开关连接在接收器和校准装置之间。 处理器包括用于从至少一个接收机装置和校准装置之一接收信号的第一输入端和用于从开关接收信号并比较第一输入和第二输入并监测发射机信号中的失真的第二输入端。