Circuitry for measuring mechanical stress impressed on a printed circuit board
US6903561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Aug 7, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for measuring mechanical stress impressed on a printed circuit board includes a number of electrically conductive pads formed on at least one outer surface of the printed circuit board, and a resistive material applied in a pattern to the printed circuit board and defining a resistor between first and second ones of the number of electrically conductive pads. The resistive material exhibits an electrical resistance that varies as the resistive material is deformed so that the resistor exhibits an electrical resistance value that varies as a function of mechanical stress impressed on the printed circuit board sufficient to deform the resistive material defining the resistor. Any number of such resistors may be formed on or within the printed circuit board, and any such resistor may form part of an external resistor bridge network configured to monitor changes in its resistance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.