RU99116013A - METHOD FOR MEASURING HORIZONTAL AVERAGE SPEED OF RIVER FLOW - Google Patents

METHOD FOR MEASURING HORIZONTAL AVERAGE SPEED OF RIVER FLOW

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Publication number
RU99116013A
RU99116013A RU99116013/28A RU99116013A RU99116013A RU 99116013 A RU99116013 A RU 99116013A RU 99116013/28 A RU99116013/28 A RU 99116013/28A RU 99116013 A RU99116013 A RU 99116013A RU 99116013 A RU99116013 A RU 99116013A
Authority
RU
Russia
Prior art keywords
distance
receiving transducers
paired
measuring
interval
Prior art date
Application number
RU99116013/28A
Other languages
Russian (ru)
Other versions
RU2194949C2 (en
Inventor
Хак Соо ЧАНГ
Original Assignee
Чангмин Тек. Ко. Лтд.
Filing date
Publication date
Priority to KR1019980021590A priority Critical patent/KR100293842B1/en
Priority claimed from KR1019980021590A external-priority patent/KR100293842B1/en
Priority to US09/154,748 priority patent/US5952583A/en
Application filed by Чангмин Тек. Ко. Лтд. filed Critical Чангмин Тек. Ко. Лтд.
Priority to DE19933473A priority patent/DE19933473B4/en
Priority to CN99110385A priority patent/CN1120988C/en
Priority to RU99116013/28A priority patent/RU2194949C2/en
Priority to CA002277626A priority patent/CA2277626A1/en
Publication of RU99116013A publication Critical patent/RU99116013A/en
Application granted granted Critical
Publication of RU2194949C2 publication Critical patent/RU2194949C2/en

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Claims (4)

1. Способ измерения горизонтальной средней скорости учения на множестве глубин воды с использованием ультразвукового луча для вычисления расхода в большой реке, включающий этапы, на которых выбирают свободное поперечное сечение S для измерения расхода, проходящее под прямым углом к направлению течения воды, устанавливают ультразвуковой излучающий преобразователь на заданной глубине вдоль одного берега реки для излучения ультразвуковых лучей в направлении к другому берегу, устанавливают парные ультразвуковые принимающие преобразователи на линии, образованной под прямым углом к свободному сечению S, разнесенные на расстояние L интервала друг от друга, на множестве глубин вдоль другого берега реки, перемещают парные ультразвуковые принимающие преобразователи в направлении, совпадающем с направлением скорости течения, ориентируясь на центральную точку, в которой происходит пересечение поперечного сечения S, фиксируют точку, в которой выходные напряжения парных ультразвуковых принимающих преобразователей равны друг другу, измеряют расстояние 1 интервала ухода ультразвука между зафиксированной точкой и центральной точкой, и измеряют, горизонтальную среднюю скорость течения V в соответствии со следующими выражениями:
V=L/t (11)
или
Figure 00000001

где t - время распространения ультразвука при прохождении на расстояние D между центральной точкой и излучающим преобразователем, а С - скорость звука в жидкости в момент измерения скорости течения.1. A method for measuring the horizontal average velocity of a study at multiple water depths using an ultrasound beam to calculate flow in a large river, comprising the steps of choosing a free cross section S for flow measurement, going at right angles to the direction of water flow, and installing an ultrasonic emitting transducer at a given depth along one river bank for the emission of ultrasonic rays in the direction to the other bank, paired ultrasonic receiving transformers are installed spruce on a line formed at right angles to the free section S, spaced at a distance L of the interval from each other, at multiple depths along the other bank of the river, move paired ultrasonic receiving transducers in the direction coinciding with the direction of the flow velocity, focusing on the central point, in where the cross section S intersects, fix the point at which the output voltages of the paired ultrasonic receiving transducers are equal to each other, measure the distance 1 of the ultra retreat interval sound between the fixed point and the center point, and measure the horizontal average flow velocity V in accordance with the following expressions:
V = L / t (11)
or
Figure 00000001

where t is the propagation time of ultrasound when traveling to a distance D between the center point and the radiating transducer, and C is the speed of sound in the liquid at the time of measuring the flow velocity. 2. Способ измерения горизонтальной средней скорости течения по п.1, отличающийся тем, что расстояние L интервала между парными ультразвуковыми принимающими преобразователями вычисляют следующим образом:
Figure 00000002

где Рmax- максимальное давление звука характеристики направленности излучающего преобразователя, P1 - давление звука, на которое рассчитаны принимающие преобразователи для приема, а β угол между линиями, соединяющими центральную точку с P1 и Рmax.2. The method of measuring the horizontal average flow velocity according to claim 1, characterized in that the distance L of the interval between paired ultrasonic receiving transducers is calculated as follows:
Figure 00000002

where P max is the maximum sound pressure of the directivity of the emitting transducer, P 1 is the sound pressure at which the receiving transducers are designed to receive, and β is the angle between the lines connecting the center point with P 1 and P max . 3. Способ измерения горизонтальной средней скорости течения по п.1, отличающийся тем, что этап фиксации точки, в которой выходные напряжения парных ультразвуковых принимающих преобразователей равны друг другу, включает дополнительные этапы, на которых подают выходные напряжения парных ультразвуковых принимающих преобразователей на дифференциальные усилители для усиления этих напряжений, определяют момент, когда разность напряжений ΔU между дифференциальными усилителями становится равной нулю, и фиксируют положение, в котором выходные напряжения парных ультразвуковых принимающих преобразователей равны друг другу. 3. The method of measuring the horizontal average flow velocity according to claim 1, characterized in that the step of fixing the point at which the output voltages of the paired ultrasonic receiving transducers are equal to each other, includes additional steps in which the output voltages of the paired ultrasonic receiving transducers are fed to differential amplifiers for amplification of these voltages, determine the moment when the voltage difference ΔU between the differential amplifiers becomes equal to zero, and fix the position in which the output e voltage paired ultrasonic receiving transducers are equal to each other. 4. Способ измерения горизонтальной средней скорости течения по п.1 или 3, отличающийся тем, что этап измерения расстояния 1 интервала ухода ультразвука включает дополнительные этапы, на которых устанавливают излучающий преобразователь и парные принимающие преобразователи, разнесенные на расстояние L интервала друг от друга, в резервуаре для воды, перемещают излучающий преобразователь вдоль линии L на интервалы, разделенные на несколько интервалов, из исходного положения, и сравнивают расстояние перемещения с расстоянием интервала, измеренным с помощью парных принимающих преобразователей, для определения момента, когда разность напряжений ΔU становится равной нулю, или расстояния L. 4. The method for measuring the horizontal average flow velocity according to claim 1 or 3, characterized in that the step of measuring the distance 1 of the ultrasound drift interval includes the additional steps of installing a radiating transducer and paired receiving transducers spaced apart by a distance L of the interval from each other, water tank, move the emitting transducer along the line L at intervals divided by several intervals from the initial position, and compare the distance of movement with the distance of the interval, measured nnym using paired receiving transducers, to determine when the voltage difference ΔU becomes zero, or the distance L.
RU99116013/28A 1998-06-10 1999-07-16 Method of measuring average horizontal speed of river current RU2194949C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019980021590A KR100293842B1 (en) 1998-06-10 1998-06-10 Horizontal average flow velocity measurement method
US09/154,748 US5952583A (en) 1998-06-10 1998-09-17 Method of measuring a river horizontal average flow velocity
DE19933473A DE19933473B4 (en) 1998-06-10 1999-07-16 Method for measuring a horizontal mean flow velocity of a river
CN99110385A CN1120988C (en) 1998-06-10 1999-07-16 Method of measuring overage flow rate of river water
RU99116013/28A RU2194949C2 (en) 1998-06-10 1999-07-16 Method of measuring average horizontal speed of river current
CA002277626A CA2277626A1 (en) 1998-06-10 1999-07-16 A method of measuring a river horizontal average flow velocity

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR1019980021590A KR100293842B1 (en) 1998-06-10 1998-06-10 Horizontal average flow velocity measurement method
DE19933473A DE19933473B4 (en) 1998-06-10 1999-07-16 Method for measuring a horizontal mean flow velocity of a river
CN99110385A CN1120988C (en) 1998-06-10 1999-07-16 Method of measuring overage flow rate of river water
RU99116013/28A RU2194949C2 (en) 1998-06-10 1999-07-16 Method of measuring average horizontal speed of river current
CA002277626A CA2277626A1 (en) 1998-06-10 1999-07-16 A method of measuring a river horizontal average flow velocity

Publications (2)

Publication Number Publication Date
RU99116013A true RU99116013A (en) 2001-05-20
RU2194949C2 RU2194949C2 (en) 2002-12-20

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Country Status (6)

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US (1) US5952583A (en)
KR (1) KR100293842B1 (en)
CN (1) CN1120988C (en)
CA (1) CA2277626A1 (en)
DE (1) DE19933473B4 (en)
RU (1) RU2194949C2 (en)

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