Use of an accelerometer to control vibrator performance
US8084968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2007 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Oct 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/2855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mobile device includes a vibrator, an accelerometer that senses a parameter of rotation, and a processor. The vibrator includes a drive motor and a drive circuit. The accelerometer senses a speed of rotation of the vibrator. The processor analyzes the sensed speed of rotation and generates a drive voltage that is received by the drive circuit to adjust the drive motor to produce a pre-determined, desired rotational speed. In another embodiment, the accelerometer senses an amplitude of a vibration produced by the vibrator. The processor analyzes the sensed amplitude of a vibration and generates a drive voltage that is received by the drive circuit to adjust the drive motor to produce a pre-determined, desired vibration amplitude. The processor may also compare the sensed parameter with a pre-determined desired parameter of rotation and generate a signal responsive to a result of the comparison and based on stored vibrator calibration curves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.