Event data recorder

The accident data memory ( Abbr: UDS ) in Switzerland also Restwegaufzeichnungsgerät ( Abbr: AOA) is in front of an electronic device that records during and after a traffic accident related data and is thus similar to a flight recorder.

The accident data recorder was invented in 1994 by the Mannesmann VDO AG and patents pending.

It can be installed in motor vehicles ( cars, trucks, buses and special vehicles ) on a voluntary basis to obtain about the processes involved in an accident more accurate findings. The UDS constantly takes various data of the vehicle ( such as speed, direction of travel, vehicle acceleration in the longitudinal and transverse direction, status of lights, turn signals and brake work, etc.) and records this for a few minutes before they are automatically deleted.

In the event of an accident ( this is detected by a strong acceleration of the vehicle as a result of contention ) remain at least the last 30 seconds saved permanently. So, after an accident much easier to reconstruct the events, so that if necessary, the question of fault can be cleared.

Many vehicles by public authorities ( such as police or ambulance service ) are so equipped, as it often leads to disputes concerning compliance with legal requirements in accidents while blue light rides. A side effect when equipped with UDS vehicles that drivers behave more cautious on the road.

The installation ( also subsequently) costs about 700 euros and can in some insurance lead to a reduction in premiums. Can be read by the UDS interface cable with an expert. The accident data recorder has a switch that allows the driver to delete the stored data immediately after an accident, in order not to incriminate himself in the later question of guilt itself. , This function can, however, for example for use in company vehicles will be blocked.

Vehicles with airbag systems store relevant accident data ( impact accelerations Gurtschlosszustände, seat positions, delay times ) in the internal memory of the trigger electronics. The amount of data is very varied, depending on the manufacturer and only extends over about 100 ms. Latest provisions of the U.S. National Highway Traffic Safety NHTSA require uniform records for all systems manufactured from 2010.

Documents

• Documentation
• Vehicle Safety