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AssigneeLely Research Holding AG, a Swiss Limited Liability Company
InventorsDick M. Oort, Karel Van den Berg
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The invention relates to a method of acoustically monitoring the course of a process, in which method the amplitude difference and/or the intensity value of sound are/is measured during the process, and the amplitudes and/or the intensity values of the sound and/or the vibrations are measured continuously or with an adjustable frequency by means of a sound and/or vibration sensor (4), such as a piezoelectric transducer (12), during the entire process or part of the process and are compared mutually and/or with a predetermined threshold value and/or reference value and/or reference pattern for the purpose of drawing, on the basis thereof, conclusions in relation to the progress and/or the course of the process and/or the presence of disturbances and/or deviations in the course of the process.
A vibration sensor for sensing and measuring sounds of fluids flowing through a conduit, which sensor comprises a housing composed of a sound insulating material that efficaciously absorbs vibrations produced by sounds, a conduit through said housing for receiving fluid flowing therethrough, a cavity in said housing which is hermetically sealed by a closing element, an insert in said cavity comprising a gas and a sound conductive viscous layer, and a piezo-electric material retained in a rigid manner between said gas and said sound conductive viscous layer, said cavity being spaced away from said conduit by said material of said housing by a distance which is not sufficient substantially to attenuate sounds emanating from fluids flowing through said conduit to be sensed by said piezo-electric material.
A vibration sensor for sensing and measuring sounds of fluids flowing through a conduit, which sensor comprises a housing composed of a sound insulating material that efficaciously absorbs vibrations produced by sounds, a conduit through said housing for receiving fluid flow therethrough, a cavity in said housing which is hermetically sealed by a closing element, a piezo-electric transducer rigidly retained within said cavity, said conduit and said cavity both being cylindrical and having respective longitudinal axes that are perpendicular to each other.
A vibration sensor for sensing and measuring sounds of a fluid flowing through a conduit, wherein the sensor comprises a piezo-sensor which is rigidly retained in a housing composed of a sound insulating material having a strong sound absorbing capacity, said housing being provided with a duct through which a fluid can flow, said duct being provided with a flow disturbing element for augmenting sound caused by the flow of a fluid through said duct in the vicinity of said flow disturbing element.
Dependencies are inferred from the claim text.