The invention provides a system for leak detection of a fluid in a pipe network. The system includes flow meters, and vibration detectors adapted to be attached to a pipe at a location in the pipe network. A processor analyzes signals generated by the flow meters and vibration detectors to identify the presence of one or more leaks in the pipe network. The invention also provides a method for detecting and localizing leaks in a pipeline network, and a device comprising a flow meter integral with a vibration detector for use in the system of the invention.

System method and device for leak detection and localization in a pipe network

The present invention provides an acoustic flow meter assembly ( 2 ) for pipes or open channels, said assembly including a frame ( 24 ) with a predetermined geometry. The frame has at least one user accessible port ( 36 - 42 ) with the at least one user accessible port ( 36 - 42 ) adapted to receive an interchangeable cartridge ( 44 ) which contains at least one acoustic transducer ( 46 ) to measure fluid velocity through said frame ( 24 ).

Flow meter assembly, gate assemblies and methods of flow measurement

A sonic- or ultrasonic flowmeter, suitable for replacement of differential pressure flowmeters, comprising: a pipe segment, to be connected to a first and a second pipe, each having a diameter, which complies to an industry standard for pipe diameters used in differential pressure flow measurement, having a length (L), which is equal to a standard length for a flow restricting element of a differential pressure flowmeter, having a diameter (D), which is equal to a standard for pipe diameters used in differential pressure flow measurement, comprising a first standard connector located on a first end of the pipe segment, and a second standard connector located on a second end of the pipe segment, a primary flow sensor, comprising at least one sonic- or ultrasonic transducer for transmission and/or reception of sonic- or ultrasonic signals through the pipe segment, mounted on the pipe segment, and a sensor electronic for providing a measurement signal representing a flow of fluid through the pipe segment, based on signals received by the sonic- or ultrasonic transducers.

Sonic- or ultrasonic flowmeter

Die Erfindung betrifft ein Ultraschall-Durchflussmessgerat mit mehreren Messkanalen. Zumindest ein Ultraschallsensor (1up, 2up, 3up; 8) ist in einem ersten Bereich der Rohrleitung (5) bzw. des Messrohres (5) angeordnet; zumindest zwei Ultraschallsensoren (1dn, 2dn, 3dn) sind in einem zweiten Bereich der Rohrleitung (5) bzw. des Messrohres (5) derart angeordnet, so dass die Ultraschall-Messsignale die Rohrleitung (5) oder das Messrohr (5) in bzw. entgegengesetzt zur Stromungsrichtung (S) des Mediums (4) auf Schallpfaden (SP) mit unterschiedlicher Lange (L) durchlaufen. Eine Sendestufe (10) regt den Ultraschallsensor (8) bzw. die Ultraschallsensoren (1up, 2up, 3up; 1dn, 2dn, 3dn) des ersten oder des zweiten Bereichs zeitgleich zur Aussendung der Ultraschall-Messsignale an. Aufgrund der unterschiedlichen Lange (L) der Schallpfade (SP) detektiert die Empfangsstufe (11) die an den Ultraschallsensoren (1dn, 2dn, 3dn; 1up, 2up, 3up) des zweiten oder des ersten Bereichs zeitlich versetzt ankommenden Ultraschall-Messsignale. Die Auswertestufe (12) ermittelt anhand der Laufzeitdifferenz der Ultraschall-Messsignale in Stromungsrichtung (S) und entgegen der Stromungsrichtung (S) auf den einzelnen Schallpfaden (SP) den Volumen- und/oder den Massedurchfluss des Mediums (4) in der Rohrleitung (5) bzw. in dem Messrohr (5).

Vorrichtung zur bestimmung oder überwachung des volumen- oder massedurchflusses eines mediums durch eine rohrleitung

An ultrasonic flowmeter includes a conduit for receiving a flow of a fluid and a flexible printed circuit board (FPC) including: a pair of ultrasonic transducers, wherein each transducer comprises a piezoelectric element divided into a plurality of segment electrodes and the FPC is bonded around the conduit; and a control circuit configured to sequentially activate the segment electrodes using a pulse train to cause at least one of the piezoelectric elements to emit a sonic signal. A delay time between activation of each successive segment electrode controls a phase velocity and an angle of emission of the corresponding sonic signal.

Phase controlled variable angle ultrasonic flow meter

A body for a flow meter for measuring the flow velocity and/or the volumetric through-flow of fluids. The flow meter body has a tubular center piece with connecting flanges for connection to a pipeline for fluids. On its exterior, the center piece has at least two substantially flat mounting surfaces (18, 20, 22, 24), each of which has at least one receptacle (32, 34; 38, 40, 42, 44) for mounting a probe (35). To enable the use of linearly emitting ultrasound probes in such flow meters, and to use the flow meter as a substitute for prior art flow meters without significant effort and cost, it is proposed to arrange the mounting surfaces (18 and 20; 22 and 24) diametrically opposite each other as a mounting surface pair (18-20; 22-24) so that the probes (35) in the opposing mounting surfaces (18 and 20; 22 and 24) define a measuring path (36, 46, 48). The mounting surfaces (18 and 20; 22 and 24) are parallel to each other and at an angle to a longitudinal axis (26) of center piece (12).

Apparatus for measuring the velocity and/or through-flow of a fluid

A flow meter, such as a gas meter, for measuring the flow velocity and/or the volumetric through-flow of fluids. The flow meter has a body with connecting flanges for connecting the meter to a pipeline for the fluids. The meter has a tubular center piece that, on its exterior, has at least two receptacles, each of which receives a measuring device. The measuring devices are coupled to a signal processing unit. Electrical cabling between the measuring devices (probes) and the signal processing unit is completely covered against damage from the exterior by partially guiding the cables through bores in walls of the center piece of the flow meter and by covering portions of the cable and protruding sections of the probes with a cap.

Apparatus for measuring the flow velocity and/or flow throughput of fluids

Die Erfindung betrifft eine Vorrichtung zum Messen der Stromungsgeschwindigkeit und/oder des Durchflusses eines Fluids mit einem Messaufnehmer (11), der Anschlussflansche (14, 16) zum Anschluss von Rohrleitungen fur das Fluid und ein rohrartiges Mittelstuck (12) aufweist, wobei an dem Mittelstuck ausenseitig wenigstens zwei Aufnahmen (32, 34, 38, 40, 42, 44) zur Aufnahme je eines Messkorpers (35) vorgesehen sind und mit einer Signalverarbeitungseinheit (56). The invention relates to a device for measuring the flow velocity and / or flow of a fluid with a sensor (11), the flanges (14, 16) for connection of pipelines for the fluid and a tubular center piece (12), wherein on the central piece on the outside at least two receptacles (32, 34, 38, 40, 42, 44) for receiving a measuring body (35) are provided with a signal processing unit (56). Um ein verbessertes Messgerat bereitzustellen, das insbesondere eine leichtere und sicherere Handhabung gewahrleistet und das besser geschutzt ist, wird vorgeschlagen, dass elektrische Verbindungen (70, 72, 74) zwischen den Messkorpern (35) und der Signalverarbeitungseinheit (56) zumindest bereichsweise in dem Messaufnehmer verdeckt gefuhrt sind. In order to provide an improved measuring instrument that particular ensures an easier and safer handling and better protected, it is suggested that electrical connections (70, 72, 74) between the measurement bodies (35) and the signal processing unit (56) at least locally in the sensor are kept hidden.

Apparatus for measuring the speed and/or the flow rate of a fluid

The device has flanges (14,16) for connecting pipelines for the fluid, a tubular central part (12) with essentially flat outer accommodation surfaces (18,22) with at least one opening (32,38,42,..) in each for a measurement body forming a diametrically opposed pair. Measurement bodies in opposing surfaces define a measurement path. The accommodation surfaces are mutually parallel and inclined to the longitudinal axis of the central part.

Measurement pick-up for measuring fluid flow rate and/or throughput has diametrically opposed accommodation surfaces with measurement bodies in openings defining measurement path

Die Erfindung betrifft eine Vorrichtung zum Messen der Stromungsgeschwindigkeit
und/oder des Durchflusses eines Fluids mit einem Messaufnehmer (11), der
Anschlussflansche (14, 16) zum Anschluss von Rohrleitungen fur das Fluid und ein
rohrartiges Mittelstuck (12) aufweist, wobei an dem Mittelstuck ausenseitig
wenigstens zwei Aufnahmen (32, 34, 38, 40, 42, 44) zur Aufnahme je eines
Messkorpers (35) vorgesehen sind und mit einer Signalverarbeitungseinheit (56).
Um ein verbessertes Messgerat bereitzustellen, das insbesondere eine leichtere
und sicherere Handhabung gewahrleistet und das besser geschutzt ist, wird
vorgeschlagen, dass elektrische Verbindungen (70, 72, 74) zwischen den
Messkorpern (35) und der Signalverarbeitungseinheit (56) zumindest bereichsweise
in dem Messaufnehmer verdeckt gefuhrt sind.

Gerry Schroeter

Papers

Apparatus for measuring the velocity and/or through-flow of a fluid

Apparatus for measuring the flow velocity and/or flow throughput of fluids

Apparatus for measuring the speed and/or the flow rate of a fluid

Measurement pick-up for measuring fluid flow rate and/or throughput has diametrically opposed accommodation surfaces with measurement bodies in openings defining measurement path

Vorrichtung zum Messen der Strömungsgeschwindigkeit und/oder des Durchflusses eines Fluids