LDV System 1-Component
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Product Details
The pre-configured (typical) one-component (1D) LDV system from TSI gets you up and running in a hurry. The fiberoptic transceiver probe offers point-and-shoot velocity measurement capability with no other probes or sensors needed. The probe is attached to a convenient rotating mount for easy setup. Processing electronics have been pre-selected and configured for a wide range of velocity measurements.
Features and Benefits
- All system components are included
- Easy-to-use FLOWSIZER™ Data Acquisition and Analysis Software included
- Low maintenance air-cooled laser included
Applications
- Wind tunnels
- Turbulence measurements
- Water channels
- Non-contact velocity measurements
- Measurements in combustion, flames, rotating machinery
Included Items
- LA300 laser
-
fiberlight™ Multicolor Beam Generator and Couplers
- TR260 Fiberoptic Transceiver Probe (two-component for ease of future upgrade)
- PDM1000-1 Photodetector Module
- FSA3500-1 Signal Processor
- FLOWSIZER Software Package
- Manuals
- Accessory kits
To learn more about LDV instrumentation and the many areas of research this system is involved in, attend TSI's Fluid Mechanics Webinar Series presented by our experts.
FAQs
What is the difference between focal length and focal distance of a lense?
Focal distance refers to the distance from the front of the lens to the beam crossing point (see figure). To define the focal length, the lens is replaced by a line, AB. The positon of the vertical line is such that the two parallel beams are deflected, as shown in the figure, so that the two beams cross. The distance measured from this line AB to the focal point is referred to as the focal length of the lens. For the case of a thin lens (thickness of the lens/focal length is small), the value of focal length and focal distance are almost the same. For the case of a thick lens, the location of the line AB will be noticeably different from the front of the lens. Hence, the focal length and focal distance will differ.
What is the relationship between the velocity component measured and the frequency (Doppler) of the signal?
The component of velocity that lies in the plane of the beams and normal to the bisector of the two laser beams of a dual-beam system is measured by an LDV system. From the following figure, the component of velocity measured is uy.If 2kappa is the angle between the two beams, the fringe spacing, df for the dual beam LDV system is:df = lambda / (2 sin kappa)where lambda is the wavelength of light.If fD is the Doppler frequency of the signal generated by the passage of a particle with velocity u (see figure) through the measuring volume:fD = uy / dfHence, the frequency of the Doppler signal is proportional to velocity.