Measurement of material level in vessels
US4247784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1978 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Dec 18, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2928
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method are disclosed for determining the level of a light-reflecting substance with regard to a reference point. The apparatus and method comprise directing a beam of light at the substance, receiving the diffuse reflected light on an arrangement of photoelectric sensor elements in a manner such that displacement of the reflected light from a predetermined position on the sensor element arrangement is sensed electronically, generating an electrical signal which is proportional to the displacement of the reflected beam from the predetermined position on the element arrangement, and using the electrical signal to determine the amount of deviation of the level of the substance from a predetermined reference point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.