RU93054005A - METHOD AND DEVICE FOR CONTROL OF GAS FLOW COMPOSITION - Google Patents

METHOD AND DEVICE FOR CONTROL OF GAS FLOW COMPOSITION

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Publication number
RU93054005A
RU93054005A RU93054005/28A RU93054005A RU93054005A RU 93054005 A RU93054005 A RU 93054005A RU 93054005/28 A RU93054005/28 A RU 93054005/28A RU 93054005 A RU93054005 A RU 93054005A RU 93054005 A RU93054005 A RU 93054005A
Authority
RU
Russia
Prior art keywords
speed
sound
temperature
gas
determined
Prior art date
Application number
RU93054005/28A
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 RU93054005A publication Critical patent/RU93054005A/en

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Claims (1)

Предложены способ и устройство для контроля химического состава проходящего газа. Колебания звуковой частоты прилагают к трубе газового потока вниз и вверх по потоку и определяют время прохождения управляющего звука на определенном измерительном расстоянии вниз и вверх по потоку. На основании времени прохождения определяют скорость звука или величину, представляющую эту скорость. Эта скорость в основном зависит от средней молекулярной массы газа, подлежащего управлению. Измеряют температуру проходящего газа и на основании измерения температуры определяют скорость звука, которая была уменьшена до получения заданной эталонной температуры, по формуле, применимой для идеального газа, либо путем использования соответствующей более реалистичной формулы. Когда приведенная к температуре скорость звука отличается от ее диапазона ожидаемых значений, вырабатывается предупредительный сигнал или сигнал контроля. Альтернативно пределы диапазона ожидаемых значений могут быть приведены к температуре.A method and apparatus for controlling the chemical composition of a passing gas are proposed. Oscillations of the sound frequency are applied to the gas stream pipe up and downstream and the travel time of the control sound is determined at a certain measuring distance downstream and upstream. Based on the travel time, the speed of sound or a value representing this speed is determined. This speed mainly depends on the average molecular weight of the gas to be controlled. The temperature of the passing gas is measured and, based on the temperature measurement, the speed of sound is determined, which was reduced to obtain a given reference temperature, by the formula applicable to the ideal gas, or by using the corresponding more realistic formula. When the speed of sound reduced to temperature differs from its range of expected values, a warning signal or a control signal is generated. Alternatively, the range of expected values may be brought to temperature.
RU93054005/28A 1991-12-23 1992-11-12 METHOD AND DEVICE FOR CONTROL OF GAS FLOW COMPOSITION RU93054005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI916103 1991-12-23

Publications (1)

Publication Number Publication Date
RU93054005A true RU93054005A (en) 1996-09-10

Family

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