公开(公告)号：US20070096724A1

公开(公告)日：2007-05-03

申请号：US11256483

申请日：2005-10-21

申请人： Larry Oberdier ,  Thaddeus Schroeder ,  Robert Disser ,  Tina Dewar ,  Thomas Baudendistel ,  Bruno Lequesne ,  Donald Morelli

发明人： Larry Oberdier ,  Thaddeus Schroeder ,  Robert Disser ,  Tina Dewar ,  Thomas Baudendistel ,  Bruno Lequesne ,  Donald Morelli

IPC分类号： G01R33/18

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。

公开(公告)号：US20060086191A1

公开(公告)日：2006-04-27

申请号：US10973011

申请日：2004-10-25

申请人： Donald Morelli ,  Bruno Lequesne ,  Larry Oberdier ,  Thomas Baudendistel

发明人： Donald Morelli ,  Bruno Lequesne ,  Larry Oberdier ,  Thomas Baudendistel

IPC分类号： G01B7/16

CPC分类号： G01L1/127 ,  G01L1/125

摘要： A magnetostrictive strain sensor (10) includes a magnetostrictive core (12) comprising a magnetostrictive material, such as a nickel-iron alloy, able to conduct a magnetic flux and whose permeability is alterable by application of a strain. A conductive coil (14) is proximate the magnetostrictive core (12) to generate the magnetic flux when electrically excited. A shell (16) surrounds the conductive coil (14) and the magnetostrictive core (12) for providing a conductive return path for the magnetic flux. An excitation source (18) is electrically connected to the conductive coil (14) for electrically exciting the conductive coil (14) with an alternating current having a constant magnitude. An in-phase voltage circuit (22) is electrically connected across the conductive coil (14). The in-phase voltage circuit (22) senses an in-phase voltage that is in-phase with the alternating current. The in-phase voltage varies correspondingly to the strain subjected to the magnetostrictive core (12). A processor (24) is operatively connected to the in-phase voltage circuit (22) to determine the strain applied to said magnetostrictive core (12) by comparing the in-phase voltage to a predetermined relationship between strain and in-phase voltage.

公开(公告)号：US20060154377A1

公开(公告)日：2006-07-13

申请号：US11033677

申请日：2005-01-12

申请人： David Lambert ,  Larry Oberdier ,  Christopher Thrush

发明人： David Lambert ,  Larry Oberdier ,  Christopher Thrush

IPC分类号： G01N31/22

CPC分类号： B82Y30/00 ,  B60K28/06 ,  G01N1/2214 ,  G01N1/405 ,  G01N21/0332 ,  G01N21/05 ,  G01N21/3504 ,  G01N33/4972 ,  G01N2001/2276 ,  G01N2021/158 ,  G01N2201/12707 ,  G01N2201/12792

摘要： A chemical vapor sensor is provided that passively measures a chemical species of interest with high sensitivity and chemical specificity. In an aspect, ethanol vapor in a vehicle cabin is measured, and sufficient sensitivity is provided to passively detect a motor vehicle driver that exceeds a legal limit of blood alcohol concentration (BAC), for use with vehicle safety systems. The sensor can be situated in an inconspicuous vehicle cabin location and operate independently without requiring active involvement by a driver. A vapor concentrator is utilized to amplify a sampled vapor concentration to a detectible level for use with an infrared (IR) detector. In an aspect, in comparison to conventional chemical sensors, the sensitivity of detection of ethanol vapor is increased by a factor of about 1,000. Further, a single channel of infrared detection is utilized avoiding spurious infrared absorption and making the chemical vapor sensor less costly to implement.

摘要翻译： 提供一种化学气相传感器，被动地测量感兴趣的化学物质，具有高灵敏度和化学特异性。 在一方面，测量车厢内的乙醇蒸气，并且提供足够的灵敏度以被动地检测超过合法限制的血液酒精浓度（BAC）的汽车驾驶员，以用于车辆安全系统。 传感器可以位于不显眼的车厢位置，并且独立操作，而不需要驾驶员的积极参与。 采用蒸汽浓缩器将取样的蒸汽浓度放大到可检测的水平以与红外（IR）检测器一起使用。 在一方面，与传统的化学传感器相比，乙醇蒸气的检测灵敏度提高了大约1,000倍。 此外，利用单个红外线检测通道可避免杂散的红外线吸收，并且使化学气相传感器的执行成本更低。