Sewage flow monitoring system
US4386409A · kind A · utility
21Cited by
7References
8Claims
0Family size
Inventor
Key dates
| Filing date | Sep 23, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Sep 23, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sewer flow monitoring system wherein the depth of fluid in a pipe is measured in pairs of transmitter-receiver ultrasonic ranging transducers. Each measurement sample is tested against a selected range criteria and against other samples, and the determined good samples are then averaged. Short range detection capability is obtained by varying the response of signal processing wherein an attenuating effect decreases with time following a transmitted pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.