Bottom up contact type ultrasonic continuous level sensor
US8061196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2008 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2962
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic sensor for measuring the level of liquid in a vessel has an elongated tubular probe, a tube within the probe, and a transducer that converts electrical energy to ultrasonic energy mounted at or near one end of the tube so as to transmit ultrasonic energy horizontally across the probe. An element having a surface that reflects ultrasonic energy is at an angle, preferably of about 45°, to the probe longitudinal axis opposite to an ultrasonic energy emitting part of the transducer to reflect ultrasonic energy received from the transducer upwardly in the probe to an air-liquid interface from which it is downwardly reflected to the angled reflector element that directs the energy reflected from the interface back to the transducer for conversion to an electrical signal that is used by an electronic module to measure the liquid level in the probe which is the liquid level in the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.