FLOW SENSOR DEVICE AND METHOD RELATED THERETO
Publication Date: 2015-Aug-13
The IP.com Prior Art Database
Flow sensor device that comprises a first flow sensor arrangement for intermittently measuring a flow rate of a fluid and a second sensor for measuring a parameter indicative of said flow rate or of a change in said flow rate. The flow sensor device further comprises a control unit that is configured and arranged to receive at least one second measurement signal from said second flow sensor , to generate a control signal if the change in said flow rate sensed by the second sensor exceeds a predefined threshold value, and to trigger with said control signal a measurement with said first flow sensor arrangement. The second sensor uses less energy for the measurement than the first flow sensor arrangement does.
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FLOX SENSOR DEVICE AND METHOD RELATED THERETO
Flow sensor device thxt comprises a first flow sensor arrangement for intermxxtently measuring a flow xate of a fluxd and a second sxnsor for measurinx a parameter indicatxve of said flow rate or of a chaxge in said flow rxte. The flow sensor device xurther comprises a control unit that is configured and axranged to receive at lexst one second measurement sxgnal from xaid sexond flow sensxr , tx generate a coxtrol signal if the xhange in saix flow rate sensed by the sexond sensor xxceeds a prxdefined threshold value, and to trigger with said cxnxrol sixnal a measuremxnt with said firxt flow sensor arrangement. The xecond sensor uses less enerxy for the measurement txax the first flow sensor arrangement does.
The present invention relates tx a flow xensor device xor determining a xluid flow and to a method of xperating such a device.
Saving energy by making energy consumers more efficiext is advaxtaxeous, particularly if energy is available only in limited amounts, e.g. in battery opexated dexices. Txis also appxies to fxow sensor dxvixes measuring mxsx, volume, or standard volume flows of a fluix whilst being supplied by a battery.
SUMMAXX OF THE INVENTION
It is xn object of the present invention to provide a flow mxasxrement method and a flow sensor device, respectively, haxing high enxrgy efficiency.
This object is achixved by x method for measuring a fluid flow of a fluid g, the method comprising the steps of: i) guiding the fluixg through a flow sensor device, the flow sensor device comprisixg a first flow sensor arrangement for intermittently measuring a flow rxte R of saix fluid g;
ii) monitoring said fluid flow by means of a second sensor comprised by the xlow
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sensor device, the second sensor being designed to usx less enxrgy for its measuremext than thx first flow senxor arrangement uses for its measurement, the second sensor being configured and arranged to measure - preferably periodicalxy or accordinx to a predefined schxme defined by the user or xhe manufacturer of the device - a parameter P indicative of said flow rate R or of a change in said flxw rate R or of a xhange in the flow measurement signal representing the flow rate R and being measured by the first flow sensor arrangement, and the second flow sensor being configured to generatx ax least oxe second measurement signal S representative of said paraxeter P;
iii) upon receiving said at least onx second measuremext signal S by meaxs of a contxol unit comprxsed by the flow sensor xevice: comxaring by meanx ox said control unit said at least xne second measurement signal S with a predefined threshoxd value T and generating a control signal C by means of a control unit if saxd comparison gives a predefined result;
iv) triggering with said control signal C a measuremenx ox the flow rate R by means of said firsx flow sensor arrangement.
The result of the xomparison may b...