公开(公告)号：US06819103B2

公开(公告)日：2004-11-16

申请号：US10276983

申请日：2002-11-21

申请人： John L. Champion ,  Robert Osiander ,  Robert B. Givens ,  Dennis K. Wickenden ,  Daniel G. Jablonski ,  James H. Higbie ,  Scott T. Radcliffe ,  Margaret A. Darrin ,  Thomas J. Kistenmacher ,  Douglas A. Oursler

发明人： John L. Champion ,  Robert Osiander ,  Robert B. Givens ,  Dennis K. Wickenden ,  Daniel G. Jablonski ,  James H. Higbie ,  Scott T. Radcliffe ,  Margaret A. Darrin ,  Thomas J. Kistenmacher ,  Douglas A. Oursler

IPC分类号： G01R3300

CPC分类号： H03H9/2447 ,  H03D7/00 ,  H03H9/02259 ,  H03H2009/02511

摘要： A Lorentz force-driven mechanical resonator apparatus that utilizes a high-Q resonant structure as both a mixing device and a high-Q bandpass filter. Specifically, an external time varying, but quasistatic, magnetic field is applied to the resonating device while simultaneously running a time varying electrical current through the device. The resulting Lorentz force (I×B) is proportional to the vector product of the electrical current in the bar (I) and the external magnetic field (B). Integrating such a resonant device with a magnetic field coil produces the functionality of an ideal radio frequency (RF) mixer coupled with a high-Q intermediate frequency (IF) filter. Wide tunability provides the capability to scan, or even step, an array of filters having very narrow bandwidths via a common local oscillator to a desired frequency range.

摘要翻译： 利用高Q谐振结构作为混合装置和高Q带通滤波器的洛伦兹力驱动机械谐振器装置。 具体地，外部时变，但准静态的磁场被施加到谐振装置，同时同时运行时变电流通过该装置。 所产生的洛伦兹力（IxB）与条（I）中的电流和外部磁场（B）的矢量积成比例。 将这种谐振装置与磁场线圈集成产生与高Q中频（IF）滤波器耦合的理想射频（RF）混频器的功能。 宽可调性提供了通过公共本地振荡器扫描甚至步进具有非常窄带宽的滤波器阵列至所需频率范围的能力。

公开(公告)号：US5959452A

公开(公告)日：1999-09-28

申请号：US943735

申请日：1997-10-03

申请人： Robert B. Givens ,  John C. Murphy ,  Dennis K. Wickenden ,  Robert Osiander ,  Thomas J. Kistenmacher

发明人： Robert B. Givens ,  John C. Murphy ,  Dennis K. Wickenden ,  Robert Osiander ,  Thomas J. Kistenmacher

IPC分类号： G01R33/028 ,  G01R33/02

CPC分类号： G01R33/028

摘要： The invention consists, in one embodiment, of a resonator such as a conductive bar supported by two wires placed at the nodal points of the fundamental resonance frequency. The wires also supply current of this frequency to the resonator. In the presence of a magnetic field, the Lorentz force causes the resonator to vibrate. The amplitude of this vibration is proportional to a vector component of the magnetic field. The motion of the resonator is detected using one of a number of possible methods including optical beam deflection. The invention has a sensitivity of at least 1 nT, comparable to that of a commercial fluxgate magnetometer, and a dynamic range exceeding 80 dB.

摘要翻译： 本发明在一个实施例中包括诸如由放置在基本共振频率的节点处的两根电线支撑的导电棒的谐振器。 电线还将该频率的电​​流提供给谐振器。 在存在磁场的情况下，洛伦兹力使谐振器振动。 该振动的振幅与磁场的矢量分量成比例。 使用包括光束偏转的多种可能方法中的一种来检测谐振器的运动。 本发明具有至少1nT的灵敏度，与商业磁通门磁强计相当，并且动态范围超过80dB。

公开(公告)号：US5998995A

公开(公告)日：1999-12-07

申请号：US944625

申请日：1997-10-03

申请人： Robert Osiander ,  Scott A. Ecelberger ,  Robert B. Givens ,  Dennis K. Wickenden ,  John C. Murphy ,  Thomas J. Kistenmacher

发明人： Robert Osiander ,  Scott A. Ecelberger ,  Robert B. Givens ,  Dennis K. Wickenden ,  John C. Murphy ,  Thomas J. Kistenmacher

IPC分类号： G01R33/02

CPC分类号： G01R33/0286 ,  G01R33/02

摘要： A microelectromechanical-based magnetostrictive magnetometer that uses, as an active element, a commercial (001) silicon microcantilever coated with an amorphous thin film of the giant magnetostrictive alloy Terfenol-D and a compact optical beam deflection transduction scheme. A set of Helmholtz coils is used to create an ac magnetic excitation field for driving the mechanical resonance of the coated microcantilever. When the coated microcantilever is placed in a dc magnetic field, the dc field will change the amplitude at the mechanical resonance of the coated microcantilever thereby causing a deflection that can be measured. The magnetometer has been demonstrated with a sensitivity near 1 .mu.T.

摘要翻译： 使用涂覆有巨磁致伸缩合金Terfenol-D的非晶薄膜的商业（001）硅微悬臂梁作为有源元件的微机电型磁致伸缩磁力计和紧凑的光束偏转换能方案。 一组亥姆霍兹线圈用于产生用于驱动涂覆的微型悬臂梁的机械共振的交流磁激励场。 当涂覆的微悬臂梁放置在直流磁场中时，直流场将改变涂覆的微型悬臂梁的机械谐振处的振幅，从而引起可测量的偏转。 磁力计已被证明灵敏度接近1亩。