发明名称 |
Test circuit with sense elements having associated and unassociated primary windings |
摘要 |
An apparatus for the nondestructive measurement of materials that includes at least two layers of electrical conductors. Within each layer, a meandering primary winding is used to create a magnetic field for interrogating a test material while sense elements or conducting loops within each meander provide a directional measurement of the test material condition in different orientations without requiring movement of the test circuit or apparatus. In a bidirectional implementation the meanders are oriented 90° apart while in a quadridirectional implementation the meanders are orientated at −45, 0, 45, and 90°. Multidirectional permeability measurements are used to assess the stress or torque on a component. These measurements are combined in a manner that removes temperature effects and hysteresis on the property measurements. This can be accomplished through a correction factor that accounts for the temperature dependence. After the correction, the permeability measurement is then used to assess the local stresses and strains in the material of interest. |
申请公布号 |
US8222897(B2) |
申请公布日期 |
2012.07.17 |
申请号 |
US20080157719 |
申请日期 |
2008.06.12 |
申请人 |
SHEIRETOV YANKO K.;GOLDFINE NEIL J.;DUNFORD TODD M.;DENENBERG SCOTT A.;GRUNDY DAVID C.;SCHLICKER DARRELL E.;WASHABAUGH ANDREW P.;WALRATH KAREN E.;JENTEK SENSORS, INC. |
发明人 |
SHEIRETOV YANKO K.;GOLDFINE NEIL J.;DUNFORD TODD M.;DENENBERG SCOTT A.;GRUNDY DAVID C.;SCHLICKER DARRELL E.;WASHABAUGH ANDREW P.;WALRATH KAREN E. |
分类号 |
G01R33/12;G01B7/24;G01N27/72;G01N27/90 |
主分类号 |
G01R33/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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