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Method for the determination of the time-delay between a main-stream ultrasonic flow sensor and a side-stream gas analyzer
Method for the determination of the time-delay between a main-stream ultrasonic flow sensor and a side-stream gas analyzer
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机译:确定主流超声波流量传感器和侧流气体分析仪之间的时间延迟的方法
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摘要
In lung function diagnostics and lung function monitoring flow velocity F and gas concentrations f x of the gases flowing in and out of the patient's lungs have to be measured synchronously, i.e. without a time-delay between F and f x . In many cases, however, the gas concentration is measured using side-stream sensors and a time-delay is caused by the gas travelling from the main-stream flow sensor to the side-stream gas sensor and by the response time of the gas sensor itself. For data analysis the time-delay between main-stream and side-stream sensors must be compensated. The method of the present invention determines the time-delay by use of the molar mass signal of a main-stream flow- and molar mass sensor. The time-delay is measured by correlating the signals of the main-stream molar mass and the side-stream gas analyzer signal.
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