RU93054781A - METHOD AND DEVICE OF ACOUSTIC MEASUREMENT OF THE FLOW FOR MEASURING THE RATE OF GAS FLOW - Google Patents

METHOD AND DEVICE OF ACOUSTIC MEASUREMENT OF THE FLOW FOR MEASURING THE RATE OF GAS FLOW

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Publication number
RU93054781A
RU93054781A RU93054781/28A RU93054781A RU93054781A RU 93054781 A RU93054781 A RU 93054781A RU 93054781/28 A RU93054781/28 A RU 93054781/28A RU 93054781 A RU93054781 A RU 93054781A RU 93054781 A RU93054781 A RU 93054781A
Authority
RU
Russia
Prior art keywords
sound
measuring
measuring tube
filters
frequency
Prior art date
Application number
RU93054781/28A
Other languages
Russian (ru)
Inventor
Мяйрянен Тармо
Коуккари Саули
Хиисмяки Пекка
Кнууттила Матти
Колл Лейф
Тиитта Антеро
Original Assignee
Инструменттитехдас Кютеля Ой
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Инструменттитехдас Кютеля Ой filed Critical Инструменттитехдас Кютеля Ой
Publication of RU93054781A publication Critical patent/RU93054781A/en

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Claims (1)

Описаны способ и устройство акустического измерения потока для измерения скоростей потока газов и/или величин, которые могут быть получены из таких скоростей. Длинноволновый звук передан в измерительную трубу. Звуковые сигналы, проходящие в газовом потоке вниз и вверх по потоку, детектировались при помощи двух звуковых детекторов, размещенных при связи с измерительной трубой на заданном расстоянии один от другого, при этом скорость потока газа, который протекает в измерительной трубе, определялась путем использования полярной корреляции упомянутых сигналов. Частота звука, который передан в измерительную трубу, сканировалась между определенными минимальной и максимальной частотами. Измерительные сигналы, проходят к узкополосному фильтру или к системе фильтров. Полоса пропускания упомянутых фильтров сканировалась синхронно с частотным сканированием передачи звука. Длительность частотного сканирования и ширина полосы пропускания упомянутых фильтров выбраны таким образом, чтобы в момент последовательности измерения измерительный сигнал, детектированный каждым звуковым детектором, проходил к своему фильтру и через него в основном без затухания, и чтобы интерференсные частоты, существенно отличные от средней частоты фильтров, подвергались значительному затуханию.A method and device for acoustic flow measurement for measuring gas flow rates and / or quantities that can be obtained from such speeds are described. The long-wave sound is transmitted to the measuring tube. Sound signals passing in the gas stream upstream and downstream were detected using two sound detectors placed when communicating with the measuring tube at a specified distance from one another, while the flow rate of the gas that flows in the measuring tube was determined using the polar correlation mentioned signals. The frequency of the sound, which is transmitted to the measuring tube, was scanned between certain minimum and maximum frequencies. Measuring signals, pass to the narrow-band filter or to the filter system. The bandwidth of the filters mentioned was scanned synchronously with the frequency scan of the sound transmission. The frequency scan duration and the bandwidth of these filters are chosen so that at the time of the measurement sequence the measurement signal detected by each sound detector passes to and through its filter mainly without attenuation, and that the interference frequencies significantly different from the average frequency of the filters, subjected to significant attenuation.
RU93054781/28A 1991-12-23 1992-11-12 METHOD AND DEVICE OF ACOUSTIC MEASUREMENT OF THE FLOW FOR MEASURING THE RATE OF GAS FLOW RU93054781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI916102 1991-12-23

Publications (1)

Publication Number Publication Date
RU93054781A true RU93054781A (en) 1996-07-20

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