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LDV SYSTEM 3-COMPONENT
The pre-configured typical three-component (3D) LDV system is used to get all three components of velocity, simultaneously. The fiberoptic transceiver probes offer point-and-shoot velocity measurement capability, with large 61 mm collection apertures. The probes are attached to convenient rotating mounts for easy setup. Alignment devices are included for obtaining high coincident data rates. Processing electronics have been pre-selected and configured for a wide range of velocity measurements.
The LDV measuring point can be traversed using an optional traverse system. The traverse, running under software control, can automatically move the measuring point while optimally selecting the system operating parameters at each location. This provides a fully automated, optimized measurement system for mapping the flow field.
Features and Benefits
- All system components are included
- Easy-to-use FLOWSIZER™ Data Acquisition and Analysis Software is included
- High-power water cooled laser included
- Sturdy mounts and rail system included
Applications
- Wind tunnels
- Turbulence measurements
- Water channels
- Non-contact velocity measurements
- Measurements in combustion, flame, rotating machinery
Included Items
- 5 Watt argon ion laser
- FBL-3 fiberlight™ Multicolor Beam Generator and six couplers
- TR160-13 One-Component Fiberoptic Transceiver Probe
- TR260 Two-Component Fiberoptic Transceiver Probe
- PDM1000-3 Three-channel Photodetector Module
- FSA 3500-3 Signal Processor
- FLOWSIZER Software Package
- Mounting and alignment hardware
- Manuals
- Accessory kits and mounting hardware
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.
To request more information on TSI's LDV systems including instrument literature, a system demonstration, a quotation, etc., please click here.
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TSI Model FBL-3 fiberlight™ Multicolor Beam Generator provides high power handling capacity in a compact easy-to-align package. Three beam pairs are generated, and six 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 Three-Channel Photo Detector Module Model PDM 1000-3 is used with LDV 3-component systems. |
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TSI Three-Channel Photodetector Module Model PDM 1000-5 is used with LDV 3-component systems |
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The TR360 Transceiver Probe is a full 3D fiber optic probe. All three beam pairs are transmitted by the TR360 and scattered light is collected in backscatter, which allows 3D measurements to be made with minimum optical access. |
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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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