Vehicular data recording apparatus and method
US6246934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2000 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | May 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P1/127
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicular data recording apparatus records running data regarding a vehicle into a memory in an overwrite manner when the running data needs to be recorded. If the vehicle enters an abnormal state, such as a crash or the like, the apparatus prevents the recording, and retains the running data recorded up to that moment in the memory. The apparatus determines whether the vehicle is in the abnormal state, for example, on the basis of a determination as to whether the vehicle has entered a stopped state within a predetermined time Tc following a time point at which the absolute value of a longitudinal acceleration Gx of the vehicle becomes equal to or greater than a reference value Gx1 and/or a time point at which the absolute value of a lateral acceleration Gy becomes equal to or greater than a reference value Gy1. Alternatively, or in addition, the vehicle is determined to be in an abnormal state based on a determination as to whether the vehicle is in the stopped state and the absolute value of the longitudinal acceleration Gx is equal to or greater than a reference value Gx2, and/or the absolute value of the lateral acceleration Gy is equal to or greater than a reference value G…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.