Photo tachometer for a digital multimeter
US6622109B2 · kind B2 · utility
4Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2001 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Oct 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/486
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A apparatus for determining the rotational speed of an object or an assembly. The apparatus includes a device that emits a light as well as detect the light reflected from the measured object. A reflective surface is attached to the object to enable it to reflect the light from the device. The device is connected to an analyzer that reads the detected signal and display the results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.