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LDV SYSTEM 2-COMPONENT
This pre-configured typical 2D, or two-component, LDV system gets you up and running in a hurry. It is a workhorse system providing maximum two-component data with minimum hardware. 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.
This system can be upgraded easily to a three-component LDV system. Since traversing, seeding, and data processing requirements will vary with the application, no traverses, particle generators, or computer is included here.
Features and Benefits
- All system components are included
- Easy-to-use FLOWSIZER™ Data Acquisition and Analysis Software is included
- System offers good mid-range capabilities
- Can be used as a starting point for more advanced capabilities
- Powerful water-cooled laser included
Applications
- Wind tunnels
- Turbulence measurements
- Water channels
- Non-contact velocity measurements
- Measurements in combustion, flame, rotating machinery
Included Items
- LA70-2 water cooled Ar ion Laser
- FBL-2 fiberlightMulticolor Beam Generator and couplers
- TR260 83-mm-diameter, two-component argon-ion fiberoptic probe for 514.5nm and 488 nm wavelengths
- PDM1000-2 Photodetector Box
- FSA 3500-2 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. Visit www.tsi.com/FMwebinars.
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The LA-300 Argon Ion Laser provides the best combination of laser power and versatility for an entry-level air cooled laser for LDV and phase Doppler systems. |
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The LA-70-5 and LA-90-5 Argon Ion Lasers offer the best performance for advanced two and three componant LDV and phase Doppler systems. |
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The LA-70-2 Argon Ion Laser provides the best combination of laser power and stability for an entry-level water cooled laser for LDV and phase Doppler systems. |
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A high performance Personal Computer (PC) to ensure compatibility and performance with the LDV/PDPA system. |
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TSI Model FBL-2 fiberlight™ Multicolor Beam Generator provides high power handling capacity in a compact easy-to-align package. Two beam pairs are generated, and four fiber couplers are provided. |
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TSI’s FlowSizer™ data acquisition, analysis, and display software is a simple-to-use yet comprehensive interface between the components of the LDV or PDPA system and the user. |
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TSI Multi-bit Digital Processor Model FSA 3500 thrives on high speed and low SNR flow situations. |
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TSI Multi-bit Digital Processor Model FSA 4000 characterizes dense sprays, supersonic wind tunnels, and large test section (long focal length) wind tunnels. |
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TSI Two-Channel Photodetector Module Model PDM 1000-2 is used with LDV 2-component systems |
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The sealed and purged design make them ideal for under water and in-flow measurements. They are particularly suited for use in TSI’s IC engine probes, which can be used in spark plug ports. |
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The TR220 Transceiver Probe provides the ability to make 2D velocity measurements in difficult to access situations. The probe is compact, sealed, rugged, and operates in the backscatter mode, with receiving optics built in. |
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The TR260 transceiver probe is our most popular two-component LDV probe. Easy to set up and use, it operates in the backscatter mode, with receiving optics built in. |
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TSI External Input Card Model EB allows input of up to 4 channels of analog data, including the once-per-rev(OPR) signal. |
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The External Input Card module allows input of four analog and one once-per-rev (OPR) signal, plus up to four channels of digital data, all using a convenient interface box with Status Light, BNCs, and D-Sub connectors. |
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These probe adaptors allow time-resolved, spatially resolved, even cycle-resolved, flow measurements in unmodified IC engines. These need no separate optical access and are used with TR 110 or TR 210 fiberoptic probes. |
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TSI Laser Power Meters provide a convenient and accurate way to measure Ar ion beam powers, to keep your LDV or PDPA system running at peak efficiency. |
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TSI Laser Laser Safety Goggles provide a solid protection from direct and scattered laser beams. We take the guesswork out of selection and purchase of Ar ion, YAG, and YLF safety eyewear, so you can focus on using the system. |
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The Oil Droplet Generator (TSI Model 9307) is used to produce large quantities of oil droplets for seeding flows when making PIV or LDV measurements. The large droplet output is especially useful for seeding high-speed flows. |
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The 10901A Polarization Axis Finder is a unique tool that provides instant indication of a laser beam's polarization axis. No twisting or turning is required. |
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TSI Rails provide the most flexible and sturdy support system for any LDV system. Various lengths are available, to customise the system to the probes and focal lengths used. |
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TSI offers a full range of seed particles to satisfy even the most difficult measurement requirements. Available in a full range of materials and sizes, TSI seed particles maximize the potential of PIV and LDV systems. |
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TSI's Model 9302 single-jet atomizer generates a polydisperse aerosol stream from a compressed air source. External pressure control and a flexible outlet tube allow the user to put the right amount of aerosol right where its needed. |
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The Six-Jet atomizer from TSI is used to generate a polydisperse aerosol in high concentrations, which can be used as seed particles for PIV and LDV measurements. External controls adjust the number of active jets and dilution air flow rate. |
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Traverse accessories help the user get the most productivity out of their TSI traverse, while enhancing operating safety. |
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Single Axis (1D) Traverse Systems are used for capturing image data at multiple planes in a flow with INSIGHT™ 3G-based PIV, HFR-PIV, PLIF, or Spray Analysis systems. These traverses are also used for capturing size and velocity profiles in a flow with a FLOWSIZER™ |
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TSI T2D and T2DE Two Axis (2D) Traverse Systems are used for capturing image data at multiple planes in a flow with INSIGHT™ 3G software-based PIV, HFR-PIV, PLIF, or Spray Analysis System. |
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Three Axis (3D) Heavy-duty Traverse Systems are used for capturing size and velocity profiles in a flow with a three-component FLOWSIZER™ software-based LDV or phase Doppler system. |
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Three Axis (3D) Traverse Systems are used for capturing image data at multiple planes in a flow with TSI INSIGHT™ 3G software-based PIV, HFR-PIV, PLIF, or Spray Analysis systems. |
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Three Axis (3D) Traverse Systems are used for capturing image data at multiple planes in a flow with INSIGHT™ 3G software-based PIV, HFR-PIV, PLIF, or Spray Analysis systems. |
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Turning Mirrors offer the user the convenience of a folded laser beam path, which reduces the footprint of the laser/fiberlight system. |
BROCHURESPOSTERSSPEC SHEETSSERVICE INFORMATION
APPLICATION NOTESTECHNICAL NOTESFREQUENTLY ASKED QUESTIONSshow/hide all answers
- 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 / df
Hence, the frequency of the Doppler signal is proportional to velocity.
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