Summary: Emphasize introductory ultrasonic to use the fundamental of Yu Mingqu discharge, water of side of river of combinative fierce steel stands bright canal discharge surveys the scene actual, told about discharge to measure the issue such as installation demarcate of the system, can measure design and spot to safeguard overhaul personnel to consult for be engaged in discharge.
Keyword: Bright canal discharge measures ultrasonic pulsatile shed water level well
MEASUREMENT ON FLOWRATE OF OPEN DITCH OF
RIVER SIDE WATER STATION
Wang Shaojun Liu Xiaolong Zhou Chen
(The Measuring Instrumentation Control Company)
Yang Xianfa Wang Pixin
(The Measurement Management Department)
Wang Decheng Wang Shusui Gao Yunpeng
(The Technological Department) (The Central Energy Resource Factory)
Abstract: This Paper Amphatically Introduces The Fundamental Principle Lf Measurement On The Flowrate Lf The Open Ditch Of The River Side Water Station By Supersonic Wave And Describes The Installation And Marking Of The Flowrae Measuring System In Combination With&Maintenance Personnel As Referntial Guide.
Keywords: Flowrate Measurement For Open Ditch Supersonic Wave Pulsating Flow Water Lever Well.
1.Introductive
The country cites to Wu Gang water of the Yangtse River stands by Jiang Xinshui and the ability collection resource of water pump of station of river side water is expended, to its accordingly water quantity undertakes metric, not only can make incline to of water cost collection reasonable, and can provide accurate data for Wu Gang's production. According to the requirement of total factory of technical center and the sources of energy, wu Gang plan accuses company and joint efforts of concerned unit brainpower, development development gives unit of road ultrasonic discharge many times, with Yu Wugang river side water stands bright canal, measure discharge, systematic classics half an year tries move, the result is favorable, achieve expect an end.
2. measures basic theory
2.1 velocity of flow are calculated basically formulary
You Mingqu is basic and academic, flow equably surely to Ming Quheng, direction of foregone edge depth of water has the computational formula of the U of dot velocity of flow of following logarithm form
In type, u -- dot velocity of flowU* -- rub shade velocity of flow
C -- invariable
H -- section depth of waterH -- dot velocity of flow is in deepness
△ -- canal wall is absolutely surface roughness
2.2 exceed principle of sonic transducer job
Supersonic transducer measures working principle, use time difference method to undertake metrical. Be in through measuring ultrasonic namely " direct current " and " refluent " transmission time is wrong, get this supersonic transducer place to shed the velocity of flow of the layer, again according to velocity of flow basic formula (1) get flow with section data. If the graph is shown 1 times, inclined inside channel to the setting one pair exceeds sonic transducer P
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