Title:
レシオメトリックスタッドセンサ
Document Type and Number:
Japanese Patent JP4152361
Kind Code:
B2
Abstract:
A stud or joist sensor device and associated sensing method using a ratio of capacitance measurements from a plurality of capacitive sensing elements. The device locates a feature of an object or discontinuity behind a surface or wall, such as an edge and/or a center of a stud behind the surface, a joist under a floorboard, a gap behind sheetrock, a metal conductor behind a surface or the like. The device may be moved over a surface, thereby detecting changes in capacitance. The change in capacitance is due to the effective dielectric constant caused by the passage over an object such as a stud. When two capacitive sensing elements provide equivalent capacitance measures, the device is over a centerline of the stud. When a ratio of the capacitance measurements equals a transition ratio, the device is over an edge of the stud.
Inventors:
Lawrence F. Miller
Application Number:
JP2004222608A
Publication Date:
September 17, 2008
Filing Date:
July 29, 2004
Export Citation:
Assignee:
Zircon Corporation
International Classes:
G01V3/08; G01R27/26
Domestic Patent References:
| JP2002341938A | ||||
| JP59045585U | ||||
| JP7050167B2 | ||||
| JP2000097736A | ||||
| JP5066102A | ||||
| JP63225188A | ||||
| JP5015116Y2 | ||||
| JP2001133207A | ||||
| JP59214702A | ||||
| JP2003202383A | ||||
| JP2001091205A |
Foreign References:
| US5917314 | ||||
| WO2003002949A1 | ||||
| WO2002063582A1 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita