Ultrasonic velocity profiler

Velocimeter products

Our velocimeters are based on the use of pulsed ultrasonic emissions for Doppler measurement of liquid velocity, including measuring opaque fluids, and other data profiles. The method is non-intrusive. Our velocity profilers provide simultaneous measurements across multiple channels with a wide range of speeds, from 0.01 mm/s to 10 m/s.

We are specifically developing Doppler velocimeters that use the correlation between successive echoes, a principle known as pulse pair processing. High-frequency velocimetry can detect the correlation between echoes and convert them directly into a velocity profile in just a few milliseconds…

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DOP 5000 + UDOP incl.

  • up to 16 channels, divided in 4 groups
  • ready for channels extension
  • easy to synchronize
  • simultaneous acquisition on 4 channels in each group
  • excellent dynamic and sensitivity
  • compact and lightweight
  • UDV 2D/3D option available
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DOP 4000 + UDOP incl.

  • Small, sturdy, compact and lightweight
  • Reduce considerably the influence of stationary echoes
  • Easy to synchronize
  • Simultaneous acquisition on its 4 channels
  • UDV 2D/3D option available
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DOP 3010 + UDOP incl.

  • 10 channels integrated multiplexeur
  • Ultrasonic synthesizer which allows any emitting frequency between 0.45 MHz to 10.5 MHz
  • 5 different spatial resolutions
  • UDV 2D/3D option available
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Doppler ultrasonic technique

Why work with us?

Signal Processing SA makes instrumentation for scientists who work in advanced laboratories and are passionate about phenomena often difficult to measure, primarily researchers in the field of fluid mechanics.

Our instruments offer the significant advantage of velocity profiling rather than just single-point measurements. The data is acquired quickly, with a typical velocity profile acquisition time of just a few milliseconds.

The spatial resolution is excellent, with a measurement volume as small as 1 mm³. The minimum distance between measurement points within the profile is around a tenth of a millimeter.
The non-intrusive measurements avoid flow disturbance by keeping the probe out of contact with the liquid. They can be taken in opaque liquids, unlike laser velocimetry, and their evaluation is unaffected by magnetic fields.

In unidirectional mode, velocity is measured along the ultrasonic axis. Bi- and tri-directional measurements are possible, with flexible data acquisition, advanced conditional triggering, and automatic recording.

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With our user-friendly UDOP software, you can easily manage each ultrasonic velocity profiler, fine-tuning every operation and parameter to meet your specific requirements.

Signal Processing SA: Pioneering ultrasonic measurements

Founded in 1990 as a spin-off from the Federal Institute of Technology in Lausanne (EPFL), Signal Processing SA is a test and measurement company based in Savigny, Switzerland.

We specialise in the development of innovative ultrasonic instruments for scientists in advanced laboratories. Our offering includes ultrasonic velocity profilers (UVP), ultrasonic Doppler velocimeters (UDV), acoustic Doppler current profiler (ADCP) and highly sensitive ultrasonic transducers that effectively address challenging measurement needs using cutting-edge technology.

We strive to ensure our customers’ success by integrating exceptional customer service and technical support into our products.

This commitment is fundamental to Signal Processing SA, with a guaranteed high level of technical expertise, prompt responses within one business day and real-time online support, as well as comprehensive documentation for all users.

FAQ

What types of fluid can be measured with a UVP or UDV?

Ultrasound travels in most liquids. Our systems are capable of measuring flow in both translucent and opaque liquids.

What is the lifespan of a UVP or UDV?

The lifespan is over 20 years with technical assistance available all throughout.

What are the costs associated with a UVP or UDV?

The extended costs include the purchase of transducers, approximately €1,000 each. No licensing fees. Software updates are free.

How works the ultrasonic velocity profile method?

The ultrasonic velocity profile method is used to measure the velocity of liquid flow within a given volume. Utilizing the ultrasonic Doppler method, this technique allows researchers and engineers to capture a detailed profile of velocity across a cross-section of a fluid. By emitting ultrasonic waves into the liquid, changes in frequency caused by the Doppler effect are analyzed to determine the speed of particles within the flow.

This profiling is particularly useful in complex fluids and non-Newtonian fluids, where traditional single-point measurements may fail to provide a comprehensive understanding of the flow dynamics. The average velocity can be calculated along various lines within the measurement volume, offering insight into both laminar and turbulent flow conditions.

One significant advantage of the ultrasonic velocity profile method is its ability to operate in transparent and opaque liquids, making it suitable for a wide range of applications, including environmental monitoring and industrial installations. The system can provide real-time data, ensuring that engineers can monitor and control processes effectively.

The methodology employed allows for a precise measurement of velocity with an excellent signal to noise ratio, enabling the detection of subtle variations in flow. This is critical in fields where maintaining accurate flow rates is essential for process control. Additionally, the system can also identify negative values when necessary, which can indicate reverse flow or other anomalies.

What does a sound velocity profiler do ?

A sound velocity profiler is an advanced device designed for measuring the velocity of liquid flow in various environments, particularly where conventional methods may encounter limitations. This system employs the principles of ultrasound to create a non-intrusive measurement technique that avoids disturbing the fluid being analyzed.

By utilizing ultrasonic waves, the device can measure how fast particles are moving within the liquid. This process involves sending sound waves through the fluid and analyzing their reflections based on the movement of particles. The data collected allows for visualization and analysis of flow patterns, enabling engineers to determine how liquids behave under different conditions.

In practical applications, the sound velocity profiler is capable of measuring liquid flow simultaneously at multiple points within a given diameter, thus providing comprehensive data across an entire cross-section of a pipe or system. This capability is particularly beneficial when dealing with harsh environments, where traditional sensors may fail or provide inaccurate readings due to physical interference.

The data obtained from these measurements can be utilized in various fields, such as experimental studies of fluid dynamics, research on non-Newtonian fluids, and optimization of industrial processes. Engineers can use this information to adjust parameters for improved efficiency, enhance product quality, and ensure compliance with safety standards.

Furthermore, the device allows for flexible data acquisition, including advanced conditional triggering and automatic recording. This adaptability makes it suitable for a wide range of field applications, providing crucial insights for process control in industries ranging from chemical manufacturing to energy production.

In summary, a sound velocity profiler is an essential tool for precise velocity measurement of liquid flow, offering significant advantages in accuracy and functionality across diverse applications. Its ability to operate effectively in challenging conditions underscores its importance in modern engineering practices.