Speed detecting apparatus
US5579012A · kind A · utility
12Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Feb 9, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A speed detecting apparatus mounted on an object moving on the ground detects a Doppler frequency for computing a moving speed thereof by receiving reflection waves of a microwave signal or a millimeter wave transmitted to the ground. The apparatus comprises a plurality of transmitting/receiving systems each having an antenna and a transmitter/receiver, and a signal processing section for computing moving speed according to Doppler frequency detected by the transmitting/receiving systems. Directivity of an antenna provided in each of the plurality of transmitting/receiving systems is set at a different angle respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.