Vortex flowmeter with optimized temperature detection
AssigneeABB Technology AG
InventorsCarsten Habersetzer, Reinhard Steinberg
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Abstract
Exemplary embodiments relate to a vortex flowmeter having a vortex body which projects into the flowing measurement medium in a measuring tube, a sensor for detecting the vortex frequency being connected downstream of said vortex body in the direction of flow and being provided with means for measuring the temperature of the measurement medium, and a downstream electronic evaluation unit determining the flow rate in a temperature-compensated manner, the sensor including a carrier body on which a plurality of piezoelectric elements, which are arranged at a distance from one another and are intended to measure the frequency, and a temperature-measuring element are placed.
Claims17
A vortex flowmeter comprising:
- a vortex body which projects into a flowing measurement medium in a measuring tube;
- a sensor for detecting a vortex frequency is connected downstream of said vortex body in a direction of flow and includes means for measuring a temperature of the measurement medium;
- and
- a downstream electronic evaluation unit determining a flow rate in a temperature-compensated manner,
- wherein the sensor includes a carrier body on which a plurality of piezoelectric elements, which are arranged at a distance from one another and are intended to measure the vortex frequency, the temperature-measuring element, and electrical conductor tracks are placed,
- wherein the carrier body includes a ceramic material,
- wherein at least the piezoelectric elements are embedded in ceramic cement that is fixed to the carrier body,
- wherein the temperature-measuring element, the electrical conductor tracks including electrical contacts, and contact areas of the piezoelectric elements include a precious metal, which is vapor-deposited on the ceramic carrier body, and
- wherein a plurality of electrical contacts for connecting the piezoelectric elements and the temperature-measuring element are arranged together on an end side at a proximal end of the carrier body.
Dependencies are inferred from the claim text.