Abstract: A measuring device has a measuring tube to be traversed by a medium in a throughflow direction as well as a magneto-inductive measuring device and an acoustic measuring device, which each are arranged on the measuring tube. The magneto-inductive measuring device comprises at least one coil that generates a magnetic field extending through the interior of the measuring tube as well as two electrodes arranged on the measuring tube, which can pick up a measurement signal.

Abstract: A measuring device with a fluid module is proposed, which comprises a measuring tube through which a fluid can flow and at least one acoustic measuring unit. The at least one acoustic measuring unit comprises at least one transmitter, at least one receiver as well as at least one waveguide. The measuring tube has at least one measuring section with a substantially angular internal cross section and at least one connecting section with a non-angular internal cross section, wherein the measuring tube has at least one transition section, which extends between the measuring section and the connecting section. The transition section has an internal cross section identical to the internal cross section of the measuring section at an end allocated to the measuring section and further an internal cross section identical to the internal cross section of the connecting section at an end allocated to the connecting section. Furthermore, a fluidic system is described.

Abstract: A measuring device with a fluid module is proposed, which comprises a measuring tube through which a fluid can flow and at least one acoustic measuring unit. The at least one acoustic measuring unit comprises at least one transmitter, at least one receiver as well as at least one waveguide. The measuring tube has at least one measuring section with a substantially angular internal cross section and at least one connecting section with a non-angular internal cross section, wherein the measuring tube has at least one transition section, which extends between the measuring section and the connecting section. The transition section has an internal cross section identical to the internal cross section of the measuring section at an end allocated to the measuring section and further an internal cross section identical to the internal cross section of the connecting section at an end allocated to the connecting section. Furthermore, a fluidic system is described.

Abstract: An apparatus for clearing water from a window comprises one or more transducers for coupling to a window. Each of the one or more transducers is operable at any selected one of a plurality of different frequencies to generate respective wave-types. A frequency generator (925) provides ultrasonic drive signals (926) to the one or more transducers for the plurality of different frequencies. A mode controller (930) controls the generator (925) and transducer configuration of electrodes (210) to apply to the window ultrasonic waves of any selected frequency and wave-type from the plurality of different frequencies and wave-types.

Abstract: A measuring device has a measuring tube to be traversed by a medium in a throughflow direction as well as a magneto-inductive measuring device and an acoustic measuring device, which each are arranged on the measuring tube. The magneto-inductive measuring device comprises at least one coil that generates a magnetic field extending through the interior of the measuring tube as well as two electrodes arranged on the measuring tube, which can pick up a measurement signal.

Abstract: A device for determining properties of a medium, comprising a carrier which can be brought in contact with the medium; at least one transmitter arranged on the carrier for exciting acoustic waves in the carrier; at least one receiver arranged on the carrier for receiving acoustic waves which originate from waves excited in the carrier by means of the transmitter; and first and second material regions arranged on the carrier, wherein the second material region absorbs sound waves with the frequency of the acoustic waves excited in the carrier more strongly than the first material region. The carrier has a first surface with which it is to be brought in con-tact with the medium and a second surface which faces away from the first surface, wherein the transmitter as well as the first and the second material region are arranged on the second surface.

Abstract: A machine tool window is provided with an apparatus for ultrasonically clearing droplets of cutting fluid from the window. The apparatus comprises a one or more transducers (200, 210) coupled to the window. Each of the one or more transducers is operable to at any selected one of a plurality of different frequencies to generate respective wave-types. A frequency generator (925) is operable to provide ultrasonic drive signals (926) to the transducers for the plurality of different frequencies. A mode controller (930) controls the generator (925) and transducer (200) to apply to the window ultrasonic waves of any selected frequency and wave type from the plurality of different frequencies and wave-types.

Abstract: An apparatus for clearing water from a window comprises one or more transducers for coupling to a window. Each of the one or more transducers is operable at any selected one of a plurality of different frequencies to generate respective wave-types. A frequency generator (925) provides ultrasonic drive signals (926) to the one or more transducers for the plurality of different frequencies. A mode controller (930) controls the generator (925) and transducer configuration of electrodes (210) to apply to the window ultrasonic waves of any selected frequency and wave-type from the plurality of different frequencies and wave-types.

Abstract: There is described a valve housing which includes an inlet, an outlet and a vibration generator. The vibration generator is a surface wave chip which is mounted flat on the valve housing and is able to couple a surface wave into the valve housing.

Abstract: An apparatus determines the properties of a medium in the form of a fluid or soft material. An acoustic waveguide has two opposing guide elements delimiting an interior space to be filled with a medium. The guide elements, upon filling the interior space with a medium, form an interface with the medium with an inner surface. A transmitter generates acoustic surface waves in the waveguide, which are received by a receiver. The waveguide can be coupled with an evaluation unit for determining physical properties of the medium based on a signal generated by the receiver. A housing accommodates the guide elements, transmitter and receiver. On the respective inner surface, at least a part of the acoustic surface waves can be converted into volumetric sound waves of the medium and at least a part of the volumetric sound waves can be converted into acoustic surface waves of the waveguide.

Abstract: An apparatus for determining a distance includes a converter element that generates n acoustic surface wave, a surface that feeds over at least part of the acoustic surface wave to a surface having a reflection point, and a processor that determines a distance between the apparatus and the reflection point from the propagation time of the acoustic surface wave. The converter element registers the acoustic surface wave reflected at the reflection point.

Abstract: A bearing including a first and a second bearing element that are movable relative to one another, a lubricant arranged between the first and the second bearing element for reducing the friction between the first and the second bearing element, at least one transmitter for exciting acoustic waves in the first or the second bearing element, the transmitter being arranged on the first or the second bearing element; at least one receiver for receiving acoustic waves evoked by the transmitter, the receiver being arranged on the first or the second bearing element, wherein information related to properties of the lubricant can be determined using a signal generated by the receiver upon receipt of acoustic waves evoked by the transmitter. The invention is also related to a method for determining properties of a lubricant in a bearing.

Abstract: The invention relates to a device for determining properties of a medium, having a carrier (2) which can be brought into contact with the medium (3); at least one transmitter (4), arranged on the carrier (2), for exciting acoustic waves (A) in the carrier (2); at least one receiver (5), arranged on the carrier (2), for receiving acoustic waves (A, A?) which originate from waves (A) excited in the carrier (2) by means of the transmitter (4); a first material region (61) arranged on the carrier (4); and a second material region (62) arranged on the carrier (4), wherein the name of the second material region (62) is such that it absorbs sound waves at the frequency of the acoustic waves (A) excited in the carrier (2) more strongly than the first material region (61). The invention also relates to a method for producing such a device.

Abstract: The invention relates to a method for investigating a structure and a structure for receiving and/or conducting a liquid or soft medium, the method comprising the steps of: a) exciting acoustic waves in the structure by means of at least one transmitter, b) converting at least a part of the energy associated with the acoustic waves (A) excited in the structure into volume sound waves of the medium, c) reconverting at least a part of the energy associated with the volume sound waves into acoustic wave energy of the structure thereby generating acoustic waves in the structure, d) receiving acoustic waves evoked by the transmitter by at least one receiver, and e) verifying whether a coating is present on a surface of the structure and/or if a coating is present determining properties of the coating by evaluating a signal generated by the receiver upon receipt of acoustic waves evoked by the transmitter and/or verifying whether a level of the medium (5) is below a predetermined value.

Abstract: The invention relates to a bearing, comprising: a first and a second bearing element (11, 13, 17, 12, 14, 18) that are movable relative to one another; a lubricant (2) arranged between the first and the second bearing element (11, 13, 17, 12, 14, 18) for reducing the friction between the first and the second bearing element; at least one transmitter (3) for exciting acoustic waves (A, A1, A2) in the first or the second bearing element (11, 13, 17, 12, 14, 18), the transmitter (3) being arranged on the first or the second bearing element; at least one receiver (4) for receiving acoustic waves evoked by the transmitter (3), the receiver (4) being arranged on the first or the second bearing element (11, 13, 17, 12, 14, 18), wherein information related to properties of the lubricant (2) can be determined using a signal generated by the receiver (4) upon receipt of acoustic waves evoked by the transmitter (3). The invention is also related to a method for determining properties of a lubricant in a bearing.

Abstract: An apparatus determines the properties of a medium in the form of a fluid or soft material. An acoustic waveguide has two opposing guide elements delimiting an interior space to be filled with a medium. The guide elements, upon filling the interior space with a medium, form an interface with the medium with an inner surface. A transmitter generates acoustic surface waves in the waveguide, which are received by a receiver. The waveguide can be coupled with an evaluation unit for determining physical properties of the medium based on a signal generated by the receiver. A housing accommodates the guide elements, transmitter and receiver. On the respective inner surface, at least a part of the acoustic surface waves can be converted into volumetric sound waves of the medium and at least a part of the volumetric sound waves can be converted into acoustic surface waves of the waveguide.

Abstract: The invention relates to a method for investigating a structure and a structure for receiving and/or conducting a liquid or soft medium, the method comprising the steps of: a) exciting acoustic waves in the structure by means of at least one transmitter, b) converting at least a part of the energy associated with the acoustic waves (A) excited in the structure into volume sound waves of the medium, c) reconverting at least a part of the energy associated with the volume sound waves into acoustic wave energy of the structure thereby generating acoustic waves in the structure, d) receiving acoustic waves evoked by the transmitter by at least one receiver, and e) verifying whether a coating is present on a surface of the structure and/or if a coating is present determining properties of the coating by evaluating a signal generated by the receiver upon receipt of acoustic waves evoked by the transmitter and/or verifying whether a level of the medium (5) is below a predetermined value.

Abstract: An apparatus for determining a distance includes a converter element that generates n acoustic surface wave, a surface that feeds over at least part of the acoustic surface wave to a surface having a reflection point, and a processor that determines a distance between the apparatus and the reflection point from the propagation time of the acoustic surface wave. The converter element registers the acoustic surface wave reflected at the reflection point.