| 摘要 |
<p>A device (10) for sensing a magnetic field gradient using an optically powered resonant integrated microstructure (O-RIMS). The O-RIMS comprises a microbeam (11) having a resonant frequency, a shell (16) supporting the microbeam (11), sensor electronics, a light transporter (36), such as an optical fiber or optical waveguide, in proximity to the shell (16), and a ferromagnetic or magnetically permeable element (26) attached to the shell (16). The ferromagnetic or magnetically permeable element (26) experiences a torque about the fulcrum (24) when a magnetic field gradient is present, and causes a strain on the shell (16). The strain is in turn transmitted to the microbeam (11), thereby affecting its resonant frequency. The change in resonant frequency of the microbeam (11) is conveyed to the sensor electronics via the light transporter (36).</p> |
