公开(公告)号：US07362096B2

公开(公告)日：2008-04-22

申请号：US11256483

申请日：2005-10-21

申请人： Larry M. Oberdier ,  Thaddeus Schroeder ,  Robert J. Disser ,  Tina M. Dewar ,  Thomas A. Baudendistel ,  Bruno Lequesne ,  Donald T. Morelli

发明人： Larry M. Oberdier ,  Thaddeus Schroeder ,  Robert J. Disser ,  Tina M. Dewar ,  Thomas A. Baudendistel ,  Bruno Lequesne ,  Donald T. Morelli

IPC分类号： G01B7/24 ,  G01L1/12

CPC分类号： G01D5/485 ,  G01D3/036 ,  G01L1/125 ,  G01L1/127

摘要： An apparatus (10) is set forth for measuring a return signal of a magnetostrictive sensor (20) that detects a force, torque, or pressure. The return signal includes noise, a DC resistance (44), an AC resistance and an inductance and the inductance is shifted ninety degrees from the AC resistance. The apparatus (10) includes a sensor filter (22) to remove the noise from the return signal. A sensor filter (22) shifts the return signal and more specifically, the inductance by an additional angle and the sum of the additional angle and the ninety degrees phase shift is defined as the final detection angle. To detect the inductance at the final detection angle, a wave filter (16) and a reference filter (28) shifts a reference signal by the final detection angle to trigger a first demodulator (26) to detect the inductance at the final detection angle. The inductance detected by the first demodulator (26) varies due to temperature. To remove the temperature from the measured inductance, the apparatus includes a DC detection circuit (42) to detect the DC resistance which is proportional to the temperature across the sensor (20). The DC resistance and the measure inductance are inserted into a correction equation to produce a corrected inductance which is independent of temperature. Instead of inductance, an AC resistance may be used in the equation.

摘要翻译： 提出了一种用于测量检测力，扭矩或压力的磁致伸缩传感器（20）的返回信号的装置（10）。 返回信号包括噪声，直流电阻（44），交流电阻和电感，电感从交流电阻偏移九十度。 装置（10）包括用于从返回信号中去除噪声的传感器滤波器（22）。 传感器滤波器（22）将返回信号更具体地将电感移位一个额外的角度，并将附加角和90度相移之和定义为最终检测角度。 为了在最终检测角度检测电感，滤波器（16）和参考滤波器（28）将参考信号移位最终检测角度，以触发第一解调器（26）以检测最终检测角度的电感。 由第一解调器（26）检测的电感由于温度而变化。 为了从测量的电感中去除温度，该装置包括一个DC检测电路（42），用于检测与传感器（20）两端的温度成比例的直流电阻。 将直流电阻和测量电感插入到校正方程中以产生与温度无关的校正电感。 代替电感，可以在等式中使用AC电阻。