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US 11,636,718 B2Granted
Method for operating a motor vehicle accident data memory and accident data memory system
AssigneeContinental Teves AG & Co. oHG
InventorUlrich Staehlin
Life of this patent
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Abstract
In a motor vehicle accident data memory and method of operating it, a reference time is determined by a satellite navigation system, and a system time is synchronized with the reference time. When an accident is detected, accident data and the system time are recorded in a non-volatile memory.
Claims11
A method of operating an accident data memory for a motor vehicle, comprising:
- establishing a system time of the accident data memory;
- obtaining raw data and a reference time from a satellite navigation system;
- generating integrity data indicating reliability or integrity of the reference time from the satellite navigation system;
- synchronizing the system time of the accident data memory with the reference time when the reference time is available;
- receiving an accident signal indicating detection of an accident of the motor vehicle;
- when the reference time becomes unavailable, calculating an integrity level of the reference time based on the integrity data existing prior to the unavailability of the reference time, and recording the integrity level of the reference time in response to the accident signal;
- receiving accident data regarding the accident;
- in response to the accident signal:
- recording the raw data from the satellite navigation system, the accident data regarding the accident, and the system time in a non-volatile memory of the accident data memory, and
- recording the integrity data in the non-volatile memory;
- and
- providing the raw data, the accident data, the system time, and the integrity data from the non-volatile memory for use in an evaluation or a reconstruction of the accident.
9 more elements
An accident data memory system for a motor vehicle, comprising:
- a non-volatile memory;
- a clock for managing a system time of the accident data memory system;
- and
- an electronic control apparatus configured:
- to establish the system time of the accident data memory system;
- to obtain raw data and a reference time from a satellite navigation system;
- to generate integrity data indicating reliability or integrity of the reference time from the satellite navigation system;
- to synchronize the system time of the accident data memory system with the reference time when the reference time is available;
- when the reference time becomes unavailable, to calculate an integrity level of the reference time based on the integrity data existing prior to the unavailability of the reference time, and record the integrity level of the reference time in response to the accident signal;
- to receive an accident signal indicating detection of an accident of the motor vehicle;
- to receive accident data regarding the accident;
- in response to the accident signal, to record the raw data from the satellite navigation system, the accident data regarding the accident, the system time in the non-volatile memory of the accident data memory system, and the integrity data in the non-volatile memory;
- and
- to provide the raw data, the accident data, and the system time from the non-volatile memory for use in an evaluation or a reconstruction of the accident.
11 more elements
Dependencies are inferred from the claim text.