发明名称 |
Method and apparatus for testing electrical connectors |
摘要 |
A method and apparatus for optically determining the distribution of normal force present at the mating surfaces of an electrical surface connector uses the birefringent properties of a photoelastic material. Photoelastic members are distributed between the two planar surfaces, and plane-polarized, narrow-band wave-length light is coupled into each member with an optical fiber. The light is directed to propagate along a principle strain axis of the photoelastic member. The temporarily birefringent photoelastic material provides a relative propagation delay between vector components of the light in each member which are perpendicular to the propagation direction. The light exiting each member is input to a plane polarizer, the output of which is measured with an intensity meter. The relative delay between the vector components creates a detectable change in intensity at the intensity meter. Correlation of the measurements for all the photoelastic members give a distribution of the forces across the planar surfaces.
|
申请公布号 |
US5177555(A) |
申请公布日期 |
1993.01.05 |
申请号 |
US19910676794 |
申请日期 |
1991.03.28 |
申请人 |
DIGITAL EQUIPMENT CORPORATION |
发明人 |
STRATTON, MARK D.;LAIRD, TERRI G. |
分类号 |
G01L5/00;G01R31/04 |
主分类号 |
G01L5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|