发明名称 |
Proximity sensor device that determines at least one physical characteristic of an item |
摘要 |
A sensor device includes the ability to determine part presence and at least one physical characteristic of the part. A drive coil and sense coil are arranged so that a voltage applied across the drive coil causes a response in the sense coil, which is influenced by the presence of the item of interest. In a first mode, a controller determines whether the item is present by determining an amount of coupling between the drive coil and the sense coil, which is indicative of whether a part is present near the sense coil. In a second mode, the controller determines an amount of magnetic flux that is indicative of a thickness of the material. In another mode, constant current applied to the drive coil instigates a voltage across both coils. The amplitude of the sense coil voltage and a phase shift of the sense coil voltage relative to the drive coil voltage provides material thickness information.
|
申请公布号 |
US6949925(B2) |
申请公布日期 |
2005.09.27 |
申请号 |
US20020060440 |
申请日期 |
2002.01.30 |
申请人 |
SYRON ENGINEERING & MANUFACTURING, LLC |
发明人 |
JOHNSON RICHARD R.;GRAFF STEPHEN M. |
分类号 |
G01B7/06;G01B7/14;G01R33/12;(IPC1-7):G01B7/14 |
主分类号 |
G01B7/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|