Device and method for testing acceleration shock sensors

摘要

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.