Test circuit for detection of malfunctions in an electric triggering device
US5515027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1993 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Jun 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test circuit for detection of malfunctions in an electric triggering device (10, 11) for protection of vehicle occupants. The triggering devices (10, 11) are arranged with a first connector (12) connected to earth (13) and a second connector (14) connected to a control unit for supply of a triggering current to the triggering devices when detecting a triggering condition. The test circuit comprises a voltage regulator (17), a current generator (18,19) connected in series between the voltage regulator and the connection of the triggering devices (10,11) to the control unit for generating a test current to the triggering devices, and two voltage comparators (24,25) connected between the earth connection (13), the connection (14) to the control unit and the voltage regulator for detecting the voltage across the triggering devices (10,11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.