摘要:
Device for detecting deposition layers in a conduit conducting a liquid or a soft medium and/or for level detection, the device comprising a transmitter (31) for generating acoustic waves (SSAW, AWM); a receiver (32) for receiving acoustic waves (SSAW, AWM) evoked by the transmitter (31); a holder (20) carrying the transmitter (31 ) and the receiver (32), wherein the holder (20) is configured to be detachably connected to the conduit (4) in such a way that the transmitter (31) and the receiver (32) are arranged on an outer side of a sidewall (41) of the conduit (4), wherein a single transmitter- receiver unit provides both the transmitter (31) and the receiver (32) or the transmitter (31) and the receiver (32) are separate units arranged in a distance from one another at the holder (20) in such a way that the transmitter (31) and the receiver (32) are located in a common plane extending at least essentially perpendicular to a longitudinal axis of the conduit (4) when the holder (20) is connected to the conduit (4); and an evaluation unit for evaluating signals generated by the receiver (32) upon receipt of acoustic waves (SSAW, AWM) evoked by the transmitter (31) to detect a deposition layer (6) on an inner surface (411) of the sidewall (41) of the conduit (4) and/or for detecting whether the level (51) of the medium (5) is below a predetermined value. According to the invention the receiver (32) is configured for receiving first acoustic waves excited by the transmitter (31) in the sidewall (41) of the conduit (4) and propagating in the sidewall (41) and for receiving second acoustic waves evoked by the transmitter (31) and propagating at least partially through the medium (5), wherein the evaluation unit is configured to detect a deposition layer (6) on the inner surface (411) of the sidewall (41) of the conduit (4) and/or whether the level (51) of the medium (6) is below a predetermined value by evaluating first signals generated by the receiver (32) upon receipt of the first acoustic waves and second signals generated by the receiver (32) upon receipt of the second acoustic waves. The invention also relates to a method for detecting deposition layers in a conduit conducting a liquid or a soft medium and/or for level detection.
摘要:
The invention relates to a sensor device and a method for investigating a flexible hollow element having an inner surface for interfacing a liquid or a soft medium, the sensor device comprising: - a support (2) to be attached to the flexible hollow element (100); - attachment means (6) for attaching the support (2) to the flexible hollow element (100); - at least one transmitter (3) arranged on the support (2) for exciting acoustic waves in the support (2); - at least one receiver (4, 4a, 4b) arranged on the support (2) for receiving acoustic waves evoked by the transmitter (3), wherein - a signal generated by the receiver (4, 4a, 4b) upon receipt of acoustic waves evoked by the transmitter (3) can be evaluated to verify whether a coating (5) is present between the inner surface (1001) of the flexible hollow element (100) and the medium (7) and/or if a coating (5) is present to determine properties of the coating.
摘要:
The invention relates to method and a device for determining characteristics of a medium, the method comprising the steps of: a) providing an acoustic waveguide (2) having a side structure (21, 22) delimiting an interior space filled with the medium (3) to be characterized such that an inner surface (215, 225) of the side structure (21, 22) forms an interface with the medium (3), b) exciting acoustic waves (B) in the waveguide side structure by means of at least one transmitter (4), c) converting at least a part of the energy associated with the acoustic waves (B) excited in the side structure into volume sound waves (A) of the medium (3), d) reconverting at least a part of the energy associated with the volume sound waves (A) into acoustic wave energy of the wave guide side structure (21, 22) thereby generating acoustic waves in the waveguide side structure, e) receiving acoustic waves (A, B) evoked by the transmitter (4) by at least one receiver (51 ), f) determining characteristics of the medium (3) from a signal (U) generated by the receiver (51, 52) upon receipt of acoustic waves (A, B) evoked by the transmitter (4). According to the invention the thickness (d 1 , d 2 , d 3 ) of the waveguide side structure (21, 22), defined as the distance between the inner surface (215, 225) and an outer surface (21 1, 221 ) of the waveguide side structure, and the frequency (f) of the acoustic waves (B) excited in the waveguide side structure (21, 22) are chosen in such a way that a first wave mode evoking a first signal of the receiver (51, 52) and a second wave mode evoking a second signal of the receiver (51 ) are excited in the waveguide side structure (21, 22), and characteristics of the medium (3) are determined using the first and the second signal. In another aspect of the invention the thickness (di, d2, d3) of the waveguide side structure (21, 22) and the frequency (f) of the acoustic waves excited in the waveguide side structure are chosen in such a way that the velocity of the acoustic waves excited in the waveguide side structure compares to the sound velocity of the medium (3).
摘要:
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; - at least one receiver (4) for receiving acoustic waves excited in the first and/or second bearing element (11, 13, 17, 12, 14, 18), 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 bearing can be determined using a signal generated by the receiver (4) upon receipt of acoustic waves in the first and/or second bearing element. The invention is also related to a method for determining properties of a bearing.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Erzeugen und/oder Nachweisen einer Strömung in einem Medium, mit - einem Trägerelement (1), das in Kontakt mit dem Medium (2) bringbar ist; - einer Mehrzahl von bewegbaren Strukturen (3), die an einer Oberfläche (11) des Trägerelements (1) angeordnet sind, wobei das Trägerelement (1) so in Bezug auf das Medium (2) anzuordnen ist, dass die bewegbaren Strukturen (3) in das Medium (2) hineinragen; und - einem Transmitter zum Erzeugen von akustischen Oberflächenwellen in dem Trägerelement (1), wobei in dem Trägerelement (1) angeregte Oberflächenwellen die Trägerelementoberfläche (11), an der die bewegbaren Strukturen (3) angeordnet sind, und somit auch die bewegbaren Strukturen (3) abwechselnd in eine Bewegung mit einer Komponente in einer ersten Richtung (A) und in eine Bewegung mit einer Komponente in einer zur ersten Richtung (A) entgegengesetzten zweiten Richtung (B) versetzen.
摘要:
The invention relates to touch sensor and a method for determining a position of a touch, the touch sensor comprising: - a substrate (2) having a touch surface (21) configured to be touched by a user; - at least one transmitter for exciting acoustic waves in the substrate (2); - a plurality of reflecting structures (5, 5a, 5b) arranged across the touch surface (21) for reflecting acoustic waves excited in the substrate (2); - at least one receiver for receiving acoustic waves evoked by the transmitter, wherein - the reflecting structures (5, 5a, 5b) and the receiver are arranged relative to one another in such a way that an acoustic wave excited in the substrate (2) by the transmitter is reflected at the reflecting structures toward the receiver, and - if the touch surface (21) is touched by a body part (6) of the user or a touching means operated by the user at least a part of the acoustic wave energy excited in the substrate (2) is converted into volume sound waves in the body part or the material of the touching means thereby modifying the acoustic waves propagating in the substrate (2); and - evaluating means configured for determining the position of a touch on the touch surface (21) using a signal generated by the receiver upon receipt of acoustic waves evoked by the transmitter.
摘要:
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 (3), b) converting at least a part of the energy associated with the acoustic waves (A) excited in the structure (2, 2a, 2b) into volume sound waves (B) of the medium (5), c) reconverting at least a part of the energy associated with the volume sound waves (B) into acoustic wave energy of the structure (2, 2a, 2b) thereby generating acoustic waves in the structure (2, 2a, 2b), d) receiving acoustic waves evoked by the transmitter by at least one receiver (4, 4a, 4b), 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 (4, 4a, 4b) upon receipt of acoustic waves evoked by the transmitter (3) and/or verifying whether a level of the medium (5) is below a predetermined value.
摘要:
The invention relates to a device for tactual presentation of information, comprising: - a liquid (3) or a gel; - a tactile layer (4) arranged adjacent the liquid (3) or gel; - an arrangement (5) for selectively deforming a surface (31) of the liquid (3) or the gel, wherein - the tactile layer (4) is arranged in such a way that a deformation (311) of the liquid (3) or gel surface causes a deformation (41) of the tactile layer (4) such that by selectively deforming the surface (31 ) of the liquid (3) or gel a tactual presentation of information can be generated in the tactile layer (4), and - the arrangement (5) for deforming the surface (31) of the liquid (3) or gel comprises at least one transmitter (51, 51a, 51 b) for generating acoustic waves (AW) in the liquid (3) or gel which travel towards the surface (31) of the liquid (3) or gel, thereby causing the deformation (311) of the surface (31).
摘要:
Die Erfindung betrifft eine Anordnung zum Durchführen einer chemischen Reaktion, mit einem Reaktionsgefäß (8), in dem mindestens eine aktive Fläche (11), die wenigstens abschnittsweise mit einem Fluid (31) in Kontakt ist, angeordnet ist, Mittel (4) zum Erzeugen von akustischen Oberflächenwellen (6) in der mindestens einen aktiven Fläche (11), wobei zumindest ein Teil der in der mindestens einen aktiven Fläche (11) angeregten Oberflächenwellen (6) in Volumenschallwellen (7) innerhalb des Fluids (31) umgewandelt wird, so dass eine an der mindestens einen aktiven Fläche (11) vorgehende chemische Reaktion oder ein vorgehender physikalische Vorgang durch die Oberflächenwellen (6) in der mindestens einen aktiven Fläche (11) und/oder durch die Volumenschallwellen (7) in dem Fluid (31) beeinflusst, insbesondere beschleunigt, wird. Die Erfindung betrifft weiterhin auch Verfahren zur Beeinflussung der Kinetik chemischer Reaktionen mittels akustischer Oberflächenwellen.
摘要:
The invention relates to a method and an arrangement for investigating the presence and/or properties of a liquid droplet, the method comprising the steps of: a) providing a substrate (2) for receiving a liquid droplet (5), b) exciting acoustic waves in the substrate (2) by means of at least one transmitter (3), c) receiving acoustic waves evoked by the transmitter (3) by at least one receiver (4), d) evaluating a signal generated by the receiver (4) upon receipt of acoustic waves evoked by the transmitter (3), e) determining whether a droplet (5) is present on the substrate (2) and/or if a droplet is present determining the position and/or properties of the droplet using the result of step d). The invention further relates to an acoustic device for focussing an acoustic wave.