Non-contacting liquid level detection system
US4630245A · kind A · utility
32Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1983 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Jul 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2962
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transmitting transducer is mounted on the outside wall of a vessel and supplies bursts of ultrasonic energy. If liquid is present, the energy is coupled to the other side of the vessel. Otherwise, the energy is attenuated. A receiving transducer (which may be the same as the transmitting transducer) is positioned to receive the ultrasonic energy if liquid is present. It is gated to be active only when such energy should arrive in the presence of liquid. The receiving transducer therefore generates an electrical signal indicating presence or absence of liquid in the vessel at the level at which the transducers are mounted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.