Vehicle tracking detection and alarm method and navigation device using the method
US8538690B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 28, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Oct 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3697
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tracking detection and alarm method which is applied to a navigation device use a number of positioning data points retrieved from a navigation module of the navigation device. A number of deflections and a number of average speeds that correspond to the position data points are calculated and generated. A number of maximum deflections are calculated and generated according to the average speeds. When a deflection of a positioning data point is greater than a maximum safe deflection thereof, one is added to a frequency of unsafe driving instances. When the frequency of unsafe driving instances is greater than a preset threshold value, an unsafe driving alarm is activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.