Apparatus and method for sensing motionlessness in a vehicle
US5736923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for sensing motionlessness for sensing motionlessness in a land-based vehicle is provided. The apparatus can include an inertial measurement unit (IMU) mounted in a predetermined orientation on the vehicle and a programmable computer. The IMU can have an inertial sensor which generates a plurality of motion signals. More than one inertial sensor can be used and, in that case, each of the sensors can be mounted in a second predetermined orientation with respect to the others, such as an orthogonal orientation, thereby creating a selected spatial reference frame. The inertial sensor can be one or more accelerometers, or one or more gyroscopes, or an accelerometer-gyroscope combination. The computer receives the motion signals and determining a motion state of the vehicle therefrom. The computer provides the motion state to a target application which acts in accordance therewith. The method can include sensing a reference sample of motion signals during a reference period; extracting a reference characteristic signal from the reference sample; sensing an operational sample during an operational period; extracting an operational characteristic signal from the op…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.