Method to detect and locate a breach in a roof membrane
US7602196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2008 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Jun 18, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A defect in a roof membrane is detected by applying a DC voltage between the roof deck and a perimeter conductor and using a detection probe pair to provide a signal indicative of the differences in voltage detected by the pair of probes so as to allow the operator to locate the defect by moving the probes to different locations. The probes are mounted on a rigid common frame such that the probe pair has a fixed separation and the frame includes a handle portion which allows ready manipulation of the frame carrying the probes by the operator. The receiver provides an audible signal emitter to the operator and includes a calibration circuit arranged to automatically maintain, despite changes in voltage applied between the roof deck and the peripheral conductor, a “0” set calibration point so as to indicate at the calibration point when zero difference in voltage is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.