Device for determining properties of a medium comprising a damping element and/or open guide element
First Claim
1. An apparatus for determining at least one of physical, chemical and biological properties of a medium, comprising:
- an acoustic waveguide, which has a conduction element with an inner side that faces the medium and an outer side that lies opposite this inner side,at least one transmitter, by means of which at least one first surface wave is excitable at the conduction element, said at least one first surface wave propagating along the conduction element and, moreover, at least partly coupling into the medium as an acoustic wave, wherein the waveguide is embodied and configured such that the acoustic wave at least partly couples into the conduction element again as a second surface wave,at least one receiver, by means of which both first and second surface waves are receivable, andone electronic evaluation device that is coupled at least to the receiver, by means of which evaluation device at least one of physical, chemical and biological properties of the medium are determinable on the basis of received first and second surface waves, wherein;
the inner side facing the medium is curved in concave fashion and the outer side is curved in convex fashion and the waveguide with the conduction element curved in that way is configured such that a second surface wave coupling-in at the concave inner side propagates along a propagation direction to the receiver, andprovision is made of at least one damping element that lies downstream of the receiver in the propagation direction of the second surface wave, said damping element being arranged and configured to prevent surface waves propagating counter to the propagation direction of the at least one second surface wave from reaching the receiver.
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Accused Products
Abstract
It is provided an apparatus for determining at least one of physical, chemical and biological properties of a medium, comprising an acoustic waveguide, which has a conduction element with an inner side that faces the medium and an outer side that lies opposite this inner side. The inner side facing the medium is curved in concave fashion and the outer side is curved in convex fashion and the waveguide with the conduction element curved in that way is configured such that a second surface wave coupling-in at the concave inner side propagates along a propagation direction to the receiver. At least one damping element lies downstream of the receiver in the propagation direction of the second surface wave, said damping element being arranged and configured to prevent surface waves propagating counter to the propagation direction of the at least one second surface wave from reaching the receiver.
11 Citations
19 Claims
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1. An apparatus for determining at least one of physical, chemical and biological properties of a medium, comprising:
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an acoustic waveguide, which has a conduction element with an inner side that faces the medium and an outer side that lies opposite this inner side, at least one transmitter, by means of which at least one first surface wave is excitable at the conduction element, said at least one first surface wave propagating along the conduction element and, moreover, at least partly coupling into the medium as an acoustic wave, wherein the waveguide is embodied and configured such that the acoustic wave at least partly couples into the conduction element again as a second surface wave, at least one receiver, by means of which both first and second surface waves are receivable, and one electronic evaluation device that is coupled at least to the receiver, by means of which evaluation device at least one of physical, chemical and biological properties of the medium are determinable on the basis of received first and second surface waves, wherein; the inner side facing the medium is curved in concave fashion and the outer side is curved in convex fashion and the waveguide with the conduction element curved in that way is configured such that a second surface wave coupling-in at the concave inner side propagates along a propagation direction to the receiver, and provision is made of at least one damping element that lies downstream of the receiver in the propagation direction of the second surface wave, said damping element being arranged and configured to prevent surface waves propagating counter to the propagation direction of the at least one second surface wave from reaching the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for determining at least one of physical, chemical and biological properties of a medium, comprising
an acoustic waveguide, which has a conduction element with an inner side that faces the medium and an outer side that lies opposite this inner side, at least one transmitter, by means of which at least one first surface wave is excitable at the conduction element, said at least one first surface wave propagating along the conduction element and, moreover, at least partly coupling into the medium as an acoustic wave, wherein the waveguide is embodied and configured such that the acoustic wave at least partly couples into the conduction element again as a second surface wave, at least one receiver, by means of which both first and second surface waves are receivable, and one electronic evaluation device that is coupled at least to the receiver, by means of which evaluation device at least one of physical, chemical and biological properties of the medium are determinable on the basis of received first and second surface waves, wherein: -
the inner side facing the medium is curved in concave fashion and the outer side is curved in convex fashion and the waveguide with a conduction element curved on one side in that way is configured such that a second surface wave coupling-in at the concave inner side propagates along a propagation direction to the receiver, and the waveguide is part of a sensor element that should be immersed into an interior filled with a medium for the purposes of determining at least one of the physical, chemical and biological properties of the medium.
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Specification