Devices for determining the physical, chemical and/or biological properties of a medium

Abstract

The invention relates in particular to a device for determining physical, chemical and / or biological properties of a medium, in which an acoustic waveguide is provided with a conducting element having an inner side facing the medium and a The inner side is opposite to the outer side. According to the invention it is provided here that the inner side towards the medium is concavely arched and the outer side is convexly arched, and that the waveguide with this arched conducting element is arranged such that the second surface wave propagates along the direction of propagation to the device wherein the second surface wave originates from the first surface wave and the acoustic wave excited thereby propagates in the medium and is coupled in on the inner side of the concave; and - there is at least one surface wave along the second surface The direction of propagation of the waves is located at an attenuation element downstream of the receiver, which is arranged and designed so as to prevent surface waves propagating opposite to the direction of propagation of the at least one second surface wave from reaching the receiver.

Description

technical field [0001] The invention relates to a device for determining physical and / or chemical and / or biological properties of a medium. Background technique [0002] The medium whose physical, chemical and / or biological properties are to be determined by such methods is preferably a liquid or soft material, especially a highly viscous, pasty 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 the known methods for determining the physical, chemical and / or biological properties of a medium, at least two sound waves are generated, for example, by transmitting a signal, which sound waves at their respective receivers located in the corresponding direction of propagation propagating along the same or a different propagation direction at least partially through the medium before being received in the receiver. For example, in a flowing m...

AI Technical Summary

Problems solved by technology

However, a disadvantage among the available systems is their relatively large configuration, making access to a wide variety of applications difficult

For example, in pipes of large nominal width, long sensor implementations are required due to the beam path, which can make installation difficult in the process

Furthermore, devices with opposing plates can be difficult to clean

Images