Water level electronic telemetry system for rivers and watercourses - has data from sensors multiplexed to computer for access by telephone

摘要

The electronic telemetry system is for monitoring the water level and flow rates in rivers and canals. It consists of a number of individual float-type or similar detectors whose output signals are sequentially selected in a measuring receiver switching unit. The incoming data is passed through an interface to a minicomputer for processing and conversion to volumetric units. A large number of measuring stations can be handled in this way and the information stored ready for interrogation by telephone-type access terminals. The transmitted information can be displayed in digital or analogue form at the receiving terminal, thus obviating the need to interpret curves on chart recorders.