Measuring the concentration of substances suspended in a liquid
US4078863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1975 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Aug 19, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to improvements in measuring the concentration of suspended substances in a liquid, the substances consisting of components of different geometrical size. The liquid is flowing in a pipe and is illuminated transverse to its flow direction by one or more light sources. A detecting means is arranged to detect light spread by the suspended substances in the liquid in another direction than that of the illuminating incident radiation. This detecting means delivers two electrical signals, the first of which represents a D.C. level measured during a predetermined time and corresponding to a detected level of luminous intensity. The second signal represents the number of times during the same said predetermined time that the detected level of luminous intensity has exceeded a definite discriminator level. The equation of the first signal is Ug = cPF + dFF and the equation of the second signal is UF = aPF + bFF, where a, b, c and d are constants, b is substantially less than a, c and d; and PF represents the concentration of suspended material in excess of a certain definite geometrical size; and FF the concentration of suspended material below the same size. The sig…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.