Ultrasonic ranging device
US4326273A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1980 |
| Grant date | Apr 20, 1982 |
| Priority date | — |
| Expiry date | Jul 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/909
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic ranging device for use in a vehicle having a high frequency oscillator supplying continuous sine wave signals to a power amplifier through a first gate controlled by a timer. A second gate controlled by the timer supplies an amplified sine wave signal from the power amplifier to a piezoelectric transducer mounted on an exterior portion of a vehicle. The transducer produces a series of repeated ultrasonic pulses and receives echoes from nearby objects converting the echoes into electrical return signals. A receiver amplifies the return signals and supplies them to a coincidence gate, which is enabled for relatively short time intervals by a timer. The coincidence gate supplies an output signal to an indicator when the return signal is detected during the interval that the gate is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.