Process and device for measuring flow parameters
AssigneeDragerwerk Aktiengesellschaft
InventorsArtur Chung-Che Kuo, Stefan Zimmermann
Life of this patent
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Abstract
A process device and system for measuring flow parameters in flowing gases is provided in which a device for flow-induced sound generation is in the area of the flow to be measured. A measurement of the frequency and/or the level of the sounds generated is made during the flow to be measured as acoustic parameters. A determination is made as to the flow parameters to be measured by processing the measured acoustic parameters. The process makes possible, in particular, the measurement of the volume flows during respiration near the patient.
Claims21
A process for measuring flow parameters in flowing gas, the process comprising the steps of:
- arranging a means for flow-induced sound generation in an area of a flow to be measured, which said flow generates a frequency from said means for flow-induced sound generation that depends on the direction of said flow;
- measuring said frequency and/or the level of a sound generated as acoustic parameters to provide measured said acoustic parameters;
- and
- determining the flow parameters by processing the measured said acoustic parameters.
A device for measuring flow parameters in a flowing gases, the device comprising:
- a sound generating means for flow-induced sound generation in the area of the flow to be measured, which generates and emits sound waves having a frequency that depends on the direction of the flow;
- a device for measuring the frequency of the sound generated as acoustic parameters to provide measured acoustic parameters;
- and
- a processor determining the flow parameters by processing the measured acoustic parameters including determining flow direction.
A flowing fluid flow parameter measuring systems comprising:
- a flow tube with flowing fluid passing through the flow tube in one of two flow directions;
- a flow-induced sound generation device for generating sound in response to the flow of the fluid to be measured said sound generating device being disposed entirely in said flow tube and generating sound having a frequency that depends on the direction of the flowing fluid;
- and
- a measuring device for measuring the frequency of the sound generated during the flow to be measured as an indication of flow direction of the flowing fluid, the measuring device being disposed entirely outside of said flow tube.
Dependencies are inferred from the claim text.