Ultrasonic wave watching device of moving object detecting type
US4114146A · kind A · utility
13Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Aug 31, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/523
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides an ultrasonic wave watching device for detecting a moving object wherein an ultrasonic wave signal generated by an oscillator is transmitted from a transmitter, reflected signals from a stationary object and moving object are received by a receiver and the variation with time of the phase difference between these received signals and the transmitted signal is detected to determine the presence and moving direction of the moving object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.