Classifications

• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
  • G07C5/00—Registering or indicating the working of vehicles
  • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
  • G07C5/0841—Registering performance data
  • G07C5/085—Registering performance data using electronic data carriers

Definitions

• the invention relates to an accident data memory with a standstill memory to provide a data set for accident reconstruction according to the Preamble of the first claim.
• the Data records consist of continuously in a time cycle Acceleration sensors and a pulse generator recorded movement data as well as status data showing the operating status of various Specify vehicle units of the vehicle that is to be saved such records is equipped with an accident data memory.
• the Data records give the course of certain characteristic measured variables a defined measurement period again, the duration of which is fixed outlined measurement period only by the time at which the Control unit of the accident data memory a control command for the Record registration is triggered, is fixed in its temporal position. Of the control command is triggered when the course, intensity and duration of the measured variables meet predetermined criteria that Experience has shown that there is an accident situation. With conventional Accident data stores form such criteria for blocking the Vehicle wheels or the occurrence of a strong negative acceleration for example by braking hard.
• the movement data include in particular the longitudinal and the Lateral acceleration of the vehicle with the appropriate one Accident data memory related acceleration sensors detected be, as well as the vehicle speed, which using an in Vehicle arranged pulse generator is determined, the pulse generator Rotation of a gear or related to vehicle movement Vehicle wheel detected.
• the data record mentioned consists of continuously in a time cycle with Acceleration sensors and a pulse generator recorded movement data as well as status data of various vehicle units of the one Vehicle in which the accident data memory is installed.
• the measurement period for The measurement data forming the data record is recorded in its temporal Location only if the three criteria mentioned are met at the same time fixed. So blocking the vehicle wheels is not enough Full braking on its own for a data record registration.
• the specified value a mentioned in the second registration criterion should preferably be in the value range between 0.5 m / s 2 and less for both accelerations than 1 m / s 2 , the time interval ⁇ t between two successive measured values preferably being in the range between 50 and 100 ms.
• This feature detects accident situations in which the vehicle is in an inclined position, for example by assuming an inclined position on an embankment or in a trench, so that a component of the earth's gravitational field is detected by the acceleration sensors assigned to the accident data memory.
• the accident data memory has at least two Record registrations triggered according to the criteria mentioned as can store separate events.
• a conventional accident data memory is also included a standstill memory which can be controlled by the control unit and which if the above three criteria are met at the same time, one Saves record.
• Each new record overwrites an older one data record located there in the standstill memory, provided the Standstill memory is not designed to store several Accident events is designed.
• the control command to trigger the Record registration according to the invention comes from the control unit of the Accident data memory, which checks on the basis of the continuously incoming measured values, whether the three criteria mentioned are met.
• the proposed solution has the advantage that it always has one records relevant to a given accident situation. So will e.g. in a vehicle that hurls on black ice with blocked wheels, the data record in question actually only occurs when the Vehicle standstill or when there is a claim Vehicle standstill criteria.
• the proposed one Accident data memory is capable of triggering the control command for to determine the data record registration as required, so that the time Location of the measurement period is chosen so that it for the present Accident situation contains meaningful data. This offense optimizes the temporal location of the measurement period, which is important since the measurement period mostly due to the limited storage capacity of the accident data memory is limited to less than 1 minute.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Time Recorders, Dirve Recorders, Access Control (AREA)
• Recording Measured Values (AREA)

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Publications (3)

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• 1997
  • 1997-04-19 DE DE19716508A patent/DE19716508A1/de not_active Ceased
• 1998
  • 1998-04-02 EP EP98106043A patent/EP0872813B1/fr not_active Expired - Lifetime
  • 1998-04-02 AT AT98106043T patent/ATE440348T1/de not_active IP Right Cessation
  • 1998-04-02 DE DE59814387T patent/DE59814387D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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