The MicroV©
A MEMS Based Versatile Velocity Sensor

This information is also available as a downloadable, printable PDF product brochure

  The MicroV© is a non-intrusive, time-of-flight velocity sensor, capable of measuring velocity of the flow or moving objects at a fixed distance from the sensor surface. The sensor is extremely compact and has no moving parts. The sensor does not include any active components and is suitable for use in harsh environments. The figure below shows the Micro V designed as a sealed surface mounted sensor along with a schematic of the sensor.


Photograph of the MicroV with a schematic of the sensor.

  The sensor uses diffractive optic elements to project two elongated light spots (approximately 75 um long and 20 um apart). The light scattered by particles in the flow or by a moving surface is collected through the same sensor element. In addition to the packaging shown above, the sensor is available as a stand-alone or OEM version, shown below.


OEM Version of the MicroV.

  The light source and the electronics are connected to the sensor via optical fibers. Optical steel jacketed conduits are available for industrial applications.


MicroV and opto-electronics driver.

Processing

  As particles travel through the optical probe volume composed of two parallel light sheets, see Figure below, they generate two scattered light intensity peaks. The processor, developed in LabView, uses an autocorrelation-based algorithm to determine time elapsed between the two peaks, t, as shown in the figure below. The time t is inversely proportional to the particle velocity. VioSense provides a PC-based signal processor developed in LabView providing an intuitive graphical user interface.


Instantaneous boundary layer characterization

  Currently in the development phase, the microsensor shown in the schematic below will be used for instantaneous boundary layer characterization and shear stress measurement.


Products | Custom Solutions | Homeland Security | Custom Designs | Publications | About Us | Contact Information | International Distributors | Newsletter | Press Releases | Home
MiniLDV | MicroS3 | MicroV | VolumeMapper | PixelFlow | Edu Flow Facility

Copyright VioSense, Inc. 2001, 2002, 2003. All Rights Reserved.

This Page Last Modified: