Method for determining medium properties and device for determining medium properties
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A technology of medium and chemical properties, applied in the measurement of flow/mass flow, analysis of fluids using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves, etc., can solve problems such as infeasible flow profile correction
Active Publication Date: 2021-11-16
ENDRESSHAUSER FLOW DEUTSCHLAND AG
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Acoustic waves always traverse the tube centrally, whereby flow profile correction is usually not feasible although the entire flow profile is detected
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[0045] exist Figure 4 Partially shown in a sectional view of a (measuring) device known per se, which is constructed and arranged for determining physical, chemical and / or biological properties of a medium M, in particular for determining or measuring the flow velocity of a flowing medium M . An acoustic waveguide with two substrates 1 , 2 as guiding elements of the waveguide is part of a measuring device through which a medium M flows. The substrates 1 , 2 , which lie opposite one another and whose (inner) surfaces 11 , 21 point toward one another run parallel to one another along the main direction of extension of the waveguide, are produced from a non-piezoelectric material. In this case, the base is the opposite section of the continuous cylindrical, preferably cylindrical, envelope of the tube R.
[0046] These bases 1 , 2 lie opposite each other at a distance a and are enclosed here by two wall sections of the pipe R opposite at this distance a, which form a waveguide...
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Abstract
The invention relates in particular to a method for determining physical, chemical and / or biological properties of a medium (M) by means of a first and a second transmitter-receiver pair (SE1, SE2; SE1, SE3) The receivers (SE2, SE3) of the receivers (SE2, SE3) receive surface waves (OW1, OW2, OW3) originating at least in part from the first or second acoustic waves (VW1, VW2, ...), which are passed through the guiding element ( The acoustic surface waves (OW1, OW2, OW3) propagating at the shell surfaces (11, 12, 21, 22) of R) are excited, propagate in the medium (M) and at least partially in turn act as surface waves (OW1, OW2, OW3) ) is coupled into the guide element, eg the tube (R) or the shell surface (11, 12, 21, 22) of the tube section. According to the invention, it is proposed: - Excitation of surface waves (OW1, OW2) by the transmitter (SE1) of the first transmitter-receiver pair (SE1, SE2), the propagation direction of said surface waves being parallel to the direction of the guide element (R) The longitudinal extension direction (z) extends, and the surface wave (OW3) is excited by the transmitter (SE1) of the second transmitter-receiver pair (SE1, SE3), the propagation direction of the surface wave being set relative to the guide The longitudinal extension (z) of the element (R) has a defined angle α, where 0°
Description
technical field [0001] The invention relates to a method for determining physical and / or chemical and / or biological properties of a medium and a device for determining physical and / or chemical and / or biological properties of a medium. Background technique [0002] The medium whose physical and / or chemical and / or biological properties are determined by this type of method is a fluid, preferably a gas, a liquid or a soft material, especially a highly viscous, doughy or pasty medium. The sound waves used to determine the properties are, for example, ultrasonic waves, which are generated by transmitting signals from corresponding transmitters. [0003] In known methods for determining physical, chemical and / or biological properties of a medium, at least two sound waves are generated, for example by transmitting a signal, which are respectively received at a receiver in the corresponding direction of propagation Previously, the sound waves propagate at least partially through th...
Claims
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