Ultrasonic flow meter

Abstract

The invention relates to flow meter (20) having at least two sensors (12, 14; 12a, 14a) which are arranged at a distance from one another, wherein said flow meter does not comprise any measuring tubewhich is otherwise necessary in many cases, wherein the sensors are located in each case at a free end of an extension (30, 32; 30a, 32a) extending from a ring-shaped carrier part (24) that is intended for mounting to a flange surface of a tube section. The flow meter can be placed between two tube segments (26, 28) of a conduit (10) by means of the ring-shaped carrier part. The extensions are aligned perpendicularly or at least substantially perpendicularly to a plane defined by the carrier part. Two sensors define in each case a signal path (34, 34a), and the signal path comprises a component (38) perpendicular to the plane defined by the carrier part. Among the exactly four sensors and correspondingly four extensions, two sensors in particular form in each case a sensor pair and the extensions carrying them form an extension pair, wherein, in each extension pair, either each extension points into another direction starting from the carrier part or, in the case of extensions orientedin the same direction, the extensions are of different lengths.

Description

technical field [0001] The invention relates to a flow measuring device, ie a flow measuring device intended to output measured values ​​encoding the flow velocity of a medium flowing through a line. Background technique [0002] Such flow measuring devices are known per se. For example, two ultrasonic sensors spaced apart in the axial direction of the measuring tube are located in a measuring tube. In the medium flowing through the measuring tube, the ultrasonic signals emitted by one of the two ultrasonic sensors in the direction of the other ultrasonic sensor propagate at least partially in the flow direction of the medium, and the ultrasonic signals emitted in the opposite direction correspondingly at least partially reverse propagating in the direction of flow of the medium. By determining the propagation time difference between an ultrasonic signal propagating in the direction of flow of the medium and an ultrasonic signal propagating against the direction of flow of...

AI Technical Summary

Problems solved by technology

The sensor is not suitable for determining the flow velocity of the medium flowing in the pipeline

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