Karman vortex flow meter

Details Karman vortex flow meter Karman vortex flow meter

1995-11-06

1997-03-25

Chilcot, Richard

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73202, G01F 132, G01F 168

Patent

active

056146817

ABSTRACT:
A Karman vortex flow meter has a detection passages located along a fluid flow in a duct 1. Flow outlets of the detection passage are disposed on an end face of a vortex generation element and flow inlets 3 are disposed upstream from the flow outlets. Heating coils for detecting flow velocity change of a fluid caused by a negative pressure of a Karman vortex are mounted in the detection passage, and swell portions are formed upstream from the heating coils in the detection passage. The flow meter that can prevent water drops, bubbles, etc., from adhering to heating coils, etc., and detect Karman vortexes stably.

REFERENCES:
patent: 4299121 (1981-11-01), Asayama et al.
patent: 4683760 (1987-08-01), Misumi

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