Method for measuring flow rate of channel by utilizing bubbles and portable bubble flow rate instrument
A flow meter and air bubble technology, which is applied in measuring devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve the problems of inability to realize continuous detection of vertical flow velocity, high quality requirements for measuring personnel, and unfavorable promotion and application. , to achieve the effect of simple structure, high-precision calculation of flow rate, and exquisite conception
Inactive Publication Date: 2012-08-15
唐山现代工控技术有限公司 +1
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The above two methods cannot be separated from the point-by-point measurement of the vertical flow velocity, generally 1-3 points, it is impossible to achieve continuous detection of the vertical flow velocity, the accuracy is low, and the quality of the measurement personnel is high, so it is not popularized and applied
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[0043] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.
[0044]A portable bubble flow meter, including smart meter 1, measuring rod 2, measuring head 3, sliding float 4, rope 5, displacement float 6, air source and valve, the smart meter is matched on the top of the measuring rod, and the measuring head is matched on the measuring rod At the bottom of the rod, the sliding float is set on the measuring rod. The displacement float is connected with the smart meter through the rope and the sliding float. The gas source is connected with the smart meter and the measuring rod through the valve. stomata.
[0045] Described smart instrument is known technology combination, comprises counter, water level gauge, data memory, microprocessor, display, wireless communication circuit etc., and counter is used for measuring rope length, and water level gauge is used for measuring ditch water depth, and data memory ...
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The invention relates to a method for measuring the flow rate of a channel by utilizing bubbles and a portable bubble flow rate instrument, belonging to the technical fields of flow rate measurement, flow measurement and data remote transmission of watercourses or channels. The technical scheme comprises the following steps of: controlling the diameters of the bubbles by utilizing the diameter ofan exhaust hole at the bottom of a measuring rod, and getting the rising speed of the bubbles through a bubble rising speed formula; producing displacement due to the action of the flow rate during the rising process of the bubbles, utilizing the measuring rod as a water depth measuring tool of water in the channel to get the water depth of the water in the channel, and further determining the displacement distance of the bubbles by utilizing the water depth of the water in the channel; and then utilizing the water depth of the water in the channel and the bubble rising speed to get bubble rising time, and getting the flow rate of the water in the channel by utilizing the bubble rising time and the displacement distance of the bubbles. The method disclosed by the invention has the beneficial effects that: the average flow rate measurement of all flow layers at the point can be completed through only one air outlet hole at the bottom of the water; equipment is portable; the flow can beprecisely calculated by utilizing a flow rate area method; and by adopting the method disclosed by the invention, continuous vertical velocity detection can be realized, the flow can be calculated with high precision, and the management of a management department is facilitated.
Description
technical field [0001] The invention relates to a method for measuring channel velocity by using air bubbles and a portable bubble velocity meter, belonging to the technical fields of measurement of channel or channel velocity, flow measurement and remote data transmission. Background technique [0002] At present, the following two methods are mostly used for manual measurement of channel flow velocity: ① handheld propeller velocity meter, and ② handheld sonic rod velocity meter. The methods are all carried out point by point by the hand-held propeller velocity meter on the measuring bridge. Manual measurements are made at various depths. The above two methods cannot be separated from the point-by-point measurement of the vertical flow velocity, generally 1-3 points, which cannot realize continuous detection of the vertical flow velocity, the accuracy is low, and the quality of the measurement personnel is high, so it is not popularized and applied. Contents of the invent...
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Inventor 张喜马月坤于树利刘永昌汪永强钱谷刘文刘峰
Owner 唐山现代工控技术有限公司