Non-contact type potentiometer, actuator, vehicle mounted radar device, and automobile drive control system
US6639544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Jun 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An actuator, a vehicle mounted radar device, and an automobile drive control system that employ a non-contact type potentiometer to detect a rotation angle of a rotary shaft. The non-contact type potentiometer includes a pair of planar magnets disposed opposite and parallel with respect to each other on a U-shaped magnetic yoke, the polarities of the magnets being arranged such that approximately parallel magnetic fields are formed around a magnetic detection element that is retained on a support shaft connected to a rotary shaft on an actuator, and can freely rotate relative to the stationary member. By rotating the rotary shaft on the actuator, a change in the output from the magnetic detection element occurs, thus allowing a rotation angle of the rotary shaft to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.