Transducer Engineering

The acoustic transducer of an ultrasound measurement system converts the electrical signals from the system into the acoustic wave and vice versa. The acoustic wave is used to collect the desired information from the medium or body (e. g., the distance to an object or changes in tissue or in materials). It is the front end of the measurement system in contact to the object or media of interest and with this an important, performance-determining part of the measurement chain. As it is in direct contact with the measurement object or the medium, it is also exposed to the environmental conditions at the measurement location and, as well as the necessary acoustic properties, also has to fulfil all of the requirements in terms of pressure, temperature, resistance to media, vibrations or shock. In addition to this, there are requirements in terms of space, design or appearance. Such a wide range of special requirements can generally only be fulfilled with an application-specific product development.

This is why we offer services for the new development or optimization of specialized sensors or actuators. This includes, for example, the specification and design of transducer systems, prototype construction, electric and acoustic validation as well as load and endurance tests. Our developments are already on the market in a wide range of products in the fields of medicine, industry or sonar applications. The frequency range in which we offer solutions knows almost no limits. It begins at low frequency at 20 kHz for cleaning or sonar applications, and ends at very high frequency at 1 GHz with sensors for applications in ultrasound microscopes. Other examples for possible sensors include:

  • medical phased, linear or curved arrays
  • matrix arrays for volumetric diagnostics
  • therapeutic and combined diagnostic/therapeutic sensors
  • catheter-based single-element transducers and arrays
  • sensors for flow measurement in gases and fluids (e. g. also clamp-on)
  • level or distance sensors (e. g. level metering in a tank, parking assistance)
  • echosounders, sidescan sonar systems
  • volumetric sonar sensors (based on Mills-Cross technology or full-matrix arrays)
  • special solutions for sonar-based object recognition (active/passive)

We work in close cooperation with the other development groups of the main department of Ultrasound and offer the entire development process from the idea to the product. Thanks to our long years of experience, our effective processes and excellent technical equipment, we can realize lean developments with short time-to-market.

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Sonar Antenna

Sonar systems were the first technical applications of ultrasound transducers. Imaging of surfaces underwater requires complex antennas. 

With their help, it is possible to reconstruct objects or areas with a high resolution. It is possible to create detailed maps of the sea floor, to examine the safety of fairways or to monitor changes of technical structures.



Matrix Antenna

The imaging of 3-dimensional surfaces underwater is an important challenge. Chess board like arrangements of ultrasound transducers allows the control of a sound beam in a volume and with this the view on an object from different directions (e.g. while passing by). Therefore, it is possible to better reconstruct the true shape of structures and to survey changes.



Sonar Sensors

For the measurement of the water depth or distances echo sounders with a single transducer element normally are used.

Such transducers need to have a variety of features: They need to withstand high pressures and a high resistance against fouling as they are mostly permanently underwater.