| 摘要 |
<p>The present invention is directed to a strain sensor comprising a monolithic magnetostrictive material core wherein the permeability of the material depends on stress, the core having an aperture therein and a coil wound about the core and through the aperture. The core and the coil being configured such that when the coil is connected in circuit, it establishes a loop of magnetic flux that circulates through the core and about the coil whereby impedance of the core is measured. Impedance being a general term including inductance, resistance and a combination of the two. Various configurations for the core are disclosed and integrated housing is also taught. The present sensor can be used to sense force, pressure, torque, acceleration and combinations thereof. The present device can be utilized to sense pressure of diesel fuel in diesel engines, oil pressure, hydraulic pressure, and earth moving and construction vehicles, etc. The sensor can be integrated in a threaded plug and is adaptable to be included in pipe made of magnetostrictive material. A method is also taught in the present application.</p> |
