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Event data recorder

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Definitions Edit

An event data recorder (EDR) is

a device or function in a vehicle that records the vehicle's dynamic time-series data during the time

period just prior to a crash event (e.g., vehicle speed vs. time) or during a crash event . . . intended for retrieval after the crash event.[1]

an electronic sensor installed in a motor vehicle that records certain technical information about a vehicle's operational performance for a few seconds immediately prior to and during a crash.[2]

Overview Edit

"EDRs are not new. Flight data recorders, also widely referred to as "black boxes," have been installed in aircraft since the 1950s and are used after accidents to reconstruct the critical moments of a plane's operations. Event recorders are also in use in railroad locomotives and large cargo and passenger ships. But the mandatory installation of EDRs in passenger cars has been controversial in Congress."[3]

"The EDR is the key electronic component in recording an accident. It accumulates data from a dedicated sensor or, sometimes, from a vehicle network. Passenger vehicle EDRs are usually incorporated within an air bag electronic controller. A crash-sensing algorithm decides within 15-50 milliseconds (msec) after an impact when the airbag should be inflated, based on model-specific criteria stored in a sensor. The algorithm also determines when the pre-crash data will be recorded."[4]

References Edit

  1. 49 C.F.R. § 563.5.
  2. "Black Boxes" in Passenger Vehicles: Policy Issues, Summary.
  3. Id.
  4. Id. at 2.

External resources Edit

  • Federal Motor Vehicle Safety Standards; Event Data Recorders, 77 Fed. Reg. 74145 (Dec. 13, 2012).

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