Device and method for testing acceleration shock sensors
US4980526A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 6, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Apr 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A testing device (11) is applied to an acceleration shock sensor (10) of the type having a reed switch (24) that operates such that the net mass of a magnet (40) is accelerated against a spring (50) upon vehicle impact or rapid deceleration of the vehicle. The change in magnet (40) position causes a change in the magnetic field that activates the reed switch (24). The testing device (11) includes an electromagnetic coil (90) mounted in an area of minimal reed switch (24) sensitivity. The electromagnetic coil (90) is connected to be capable of providing a current flow that creates a magnetic field that opposes the magnetic field of the magnet (40). Upon energizing of the coil (90), the magnet (40) is urged to accelerate in a manner that emulates the acceleration of the magnet (40) caused by vehicle collision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.