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Two-Component Laser Doppler Velocimetry Using an Integrated Laser Motion Sensor
Optical flow velocimetry is most often based on one of two physical principles: measurement of Doppler shifts or detection of pattern motions. While dedicated hardware and software solutions have been developed for both approaches, a simpler and more cost efficient solution may be implemented...
...using integrated laser motion sensors such as those used in optical mice. The project is aimed at the evaluation of such a sensor for two-dimensional flow velocimetry in a typical aerodynamic application.
A special family of high-end optical mouse sensors (“Twineye”) is available that is based on the Doppler analysis of self-mixing laser sensors. This implements essentially the functionality of a two-component laser Doppler anemometer on a single chip and opens up a number of application scenarios. The project is aimed at evaluating the sensor’s performance in such an off-design application and compare it against other technologies (e.g. thermal anemometer, multi-hole pressure probe).
_Prerequisites_
- Basic education in fluid dynamics
- Programming skills (e.g. Matlab)
- Basic knowledge of image processing / analysis techniques
- Basic programming skills (C/C++) for microcontrollers (e.g. Arduino)
...using integrated laser motion sensors such as those used in optical mice. The project is aimed at the evaluation of such a sensor for two-dimensional flow velocimetry in a typical aerodynamic application.
A special family of high-end optical mouse sensors (“Twineye”) is available that is based on the Doppler analysis of self-mixing laser sensors. This implements essentially the functionality of a two-component laser Doppler anemometer on a single chip and opens up a number of application scenarios. The project is aimed at evaluating the sensor’s performance in such an off-design application and compare it against other technologies (e.g. thermal anemometer, multi-hole pressure probe).
_Prerequisites_
- Basic education in fluid dynamics - Programming skills (e.g. Matlab) - Basic knowledge of image processing / analysis techniques - Basic programming skills (C/C++) for microcontrollers (e.g. Arduino)
- Study of the relevant literature regarding Doppler velocimetry sensors for mice; definition and comparison of performance criteria for flow velocimetry applications
- Interfacing of a representative Doppler sensor to a microcontroller and / or PC
- Evaluation of the sensor functionalities and performance using a synthetic moving target
- Exemplary flow measurements in a (seeded) aerodynamic flow
- Study of the relevant literature regarding Doppler velocimetry sensors for mice; definition and comparison of performance criteria for flow velocimetry applications - Interfacing of a representative Doppler sensor to a microcontroller and / or PC - Evaluation of the sensor functionalities and performance using a synthetic moving target - Exemplary flow measurements in a (seeded) aerodynamic flow
Prof. Dr. Thomas Rösgen (roesgen@ifd.mavt.ethz.ch)
Prof. Dr. Thomas Rösgen (roesgen@ifd.mavt.ethz.ch)
