PIV system components

PIV System components

PIV software KoncertoⅡ supports wide range of cameras

In combustion measurement by LIF, it is possible to identify acetone, OH, CH, NO among gas molecular species.It is also possible to measure their instantaneous distribution. Especially, planar LIF measurement by image is called PLIF (Image Laser Induced Fluorescence, Planer Laser Induced Fluorescence).  The basic optical system for observing LIF is shown in the figure.

KoncertoⅡis designed to easily add support for new cameras and supports wide range of cameras for PIV, Time Resolved PIV, Micro PIV, LIF, etc.
KoncertoⅡ uses a high resolution digital camera that can capture two images at a time interval of less than a few microseconds with frame straddling technology.We are preparing various types of cameras that are compatible with normal PIV, large scale PIV, time series PIV, micro PIV etc.
We will respond to requests for cameras other than the following on request, so please inquire in detail.

High Speed Cameras

General purpoise type

Low price, high sensitivity general purpose type. It is compact, easy to handle, applicable to various applications.

 

High spped type

High speed, high sensitivity high performance type. It is useful for flow measurement in the engine and vortex flow measurement on fluid sound sources.

 

High resolution type

High resolution type that is suitable for wide range measurement in the wind tunnel, high spatial resolution measurement, PIV,LIF,DIC measurement and so on.

 

High Resolution Cameras

High resolution Camera

2M, 6M, 11M etc, various PIV exclusive high resolution cameras are supported.
With the frame straddling technology it is possible to capture two images at intervals of less than a few microseconds.
Please contact us for details.

 

Lasers for PIV

Double pulse laser is widely used for a standard 2D-PIVsystem.

As it has two independent laser heads, the pulseseparation between double pulse is completely flexible. Many other types of PIV lasers, such as CW Q-switchhigh repetition rate pulse lasers for time resolved PIVsystems and CW lasers for Confocal Scanning MicroPIV systems, etc., are available.

Double pulse laser

High repetitive double pulse laser

Fiber delivery is also possible with spatial mode. Suitable for fluid measurement in unsteady state.

You can see by side scrolling.

Feature 


 Double pulse is generated by one resonator

 Repetition frequency up to 30 kHz

 Possible to capture time series phenomena

 Fiber delivery available     
Specification
Wavelength 527nm / 532nm 
 Repetition frequency Single shot ~ 30 kHz
output ~100mJ @ 1kHz
pulse width ~200ns ( FWHM )
Low repetitive double pulse laser

Double pulse laser of 100 Hz or less. Suitable for PIV measurement of steady flow in a wide range because of high energy.

You can see by side scrolling.

Feature

■ Double pulses are generated by two resonators

 A3 size laser head

 Output energy up to 300 mJ

 It is possible to capture a wide range     

Specification
Wavelength 532nm 
Repetition frequency Single shot ~ 100 kHz
Output ~300mJ @ 10kHz
Pulse width ~13ns ( FWHM ) 

Continuous wave laser

Continuous wave laser

You can select Blue, green, yellow, red for confocal PIV and support up to 20 W @ 532 nm.

You can see by side scrolling.

Feature

■ 
Output in excellent spatial beam mode

■ Fiber delivery available

■ Easy operation

Specification
Wavelength  488nm / 532nm / 561nm / 594nm / 785nm
Modulation compatible
(some products are not supported)
Possible
output 300mW @ 488nm
20W @ 532nm
300mW @ 561nm
75mW @ 549nm
75mW @ 785nm

Optical system for PIV / MicroPIV

We have various optical equipments to be used with PIV such as laser sheet optics, cylindrical lens, 90 degree mirror block, fiber optic optics, light arm etc.
In addition, the optical system dedicated to micro imaging can also support high power pulse lasers, UV lasers and so on.

The micro optical system is a flexible microscope system that can be installed at all angles according to the specimen, such as erecting observation, inverted observation, as well as lateral and diagonal.

Light sheet optics

Light sheet optics BZ-61N

Light sheet generating optical system for visualization.The focal length is a stepless adjustment type.

An up collimator is built in, and an extremely thin light seat is obtained.The light seat opening angle adjustment is a lens interchangeable type, and since cylindrical lenses constitute one sheet, good light sheets can be obtained to both ends.

In addition to directly attaching to the laser head, it can be mounted on a light arm, mounted on an optical fiber, installed alone, etc.

You can see by side scrolling.



Equipment configuration


 
Body

 Fixing ring

 With 3 cylindrical lenses

■ Shutter mount (option)

■ Fiber adapter (optional)
   
Incident beam diameter 2mm ~ 12mm
 Incident wavelength 532nm
266 ~ 355
Other wavelength (option)
 size ( L ) 135mm × ( φ ) 61mm 
Focal length
※ Distance from the tip of the optical system
 to where the sheet becomes thinnest 
200mm ~ ∞ ( Stepless adjustment type ) 
 Replacement cylindrical lens -30W , -30 , -50 , -70 , -100 , -200 , -300 
Up collimator 2X
Safety shutter Mechanical shutter

 

You can see by side scrolling.

 Example of irradiation range

Cylindrical lens   Beam diameter 3.5 mm Beam diameter 5 mm 
Light seat opening angle (degree)  Light seat width  Light seat opening angle (degree)  Light seat width 
from the probe tip 500 mm (mm)   from the probe tip 1000 mm (mm) from the probe tip 500 mm (mm) from the probe tip 1000 mm (mm) 
30W 50 220 440 60 280 560 
30 25 100 200 30 130  260
50 12 50 110 20 80  160
70 10 40 80 13 55  110
-100 5 20 55 9 35  70
-200 4 15 30 6 25  50
-300 3 10 15 4 15  20
Light sheet optics BZ-50 series

Simple light sheet optical system for visualization. Applicable to CW laser , and double pulse YAG laser of 50 mJ or less. The focal length is infinitely adjustable and it is possible to produce light light sheets. In addition, opening angle adjustment is possible by replacing the tip lens.

Equipment configuration

 Body
 Fixing ring
 Cylindrical lenses
 Fiber adapter (optional)               

Other optics

90 °mirror optical system BZMB-90E

90 °mirror optical system BZMB-90E
Mirror box which can directly mount all products of the BZ series, and it is used to bend the laser light around 90 degrees. The built-in mirror mount has a two-axis gimbal structure, and its center of rotation coincides with the mirror center surface, making alignment easy. Installation of the power monitor is also possible. Select wavelength when purchasing. When using multiple, can connect the blocks with expansion and contraction laser tube. 

Adapters and Expander

Light arm and Scope optics

Light arm and Scope optics
Laser Light arm

Laser light arm LA-150
Laser light arm is an articulated flexible light arm for transmitting pulsed laser light to an arbitrary place. We use this light arm because high-power pulse laser light can not be transmitted by optical fiber. It is safe because it is completely sealed from the laser head to the light sealing irradiation part.

Endoscope

You can see by side scrolling.

Endoscope ES-10S / UV Endoscope ES-10S-UV

It is a heat resistant endoscope, available for visible and UV.
It is used to measure PIV and LIF inside the combustion chamber of the engine.
Probe length, wavelength range, viewing angle, observation direction, magnification etc. can be selected.









Specifications
Probe diameter  φ10mm 
 Effective length  250mm
Usable wavelength range   Visualization ・ UV ( 280 ~ 600nm )
 Viewing angle(FOV) 45 degree ・ 60 degree ・ 70 degree ・
100 degree ・ 120 degree 
Magnification 2 Double ・ 1 Double ・ 1/2 Double
( Specialty lens addition )
Image circle   φ16mm
Material of lens barrel part ( L ) 135mm × ( φ ) 61mm 
Lens barrel part size φ10mm×L251mm
Optical path extension / bending Hinged extension lens barrel
Camera connection mount T2 mount ( C mount · F mount conversion )
Air-cooled tube fitting Corresponds to φ 4 mm tube
Periscope

Periscope light sheet probe PL-400
It is a tool for irradiating the light sheet inside the casing of a compressor or turbine, and it is attached to the tip of the light arm for use.
It is a design that can be used at high temperature field and has no parts falling out.

Cassegrain system

The Cassegrain system can enlarge and shoot a microscopic area from a distance by using Makutoff Cassegrain type optical system. It is ideal for spray shooting and burning field shooting, which can not observe objects as close-up as ordinary microscope. The Cassegrain system has no aberration and has resolution of micron order. Because the relative speed increases with shooting, the high-speed video coupling unit is prepared to correspond to various high-speed shooting equipment.

Features

 Type: Makhstov Cassegrain method ( main mirror: aspheric surface )

 Correction lens / secondary mirror: effective diameter 115/30 mm

 WD:150mm~600mm

 Resolution: 2.8 μm at 300 mm, 4.1 μm at 600 mm

 Mount type: C mount · CS mount · T2 mount compatible

 Eyepiec:for focus

 Imaging circle:φ 24 mm

 Effective resolution image circle: φ12 mm (1 inch correspondence )

 Optical path switching:beam splitter method

 In-focus method:stage and main mirror movement method (micrometer)

Seeding system

Seeding is an important technology in PIV.The seeding particle generator for airflow measurement is most suitable for measurements requiring a large amount of seeding such as high speed airflow and large wind tunnel.
As is common in PIV, how to spread seeding particles evenly is an important point.We have various types of models that match the application, including CTS - 1000, the next - generation large particle size seeding generator.

 Air / gases : Laskin nozzle type of oil particle seeding generator
 Combustion and plasma : solid particle generator
 Water / liquid : Micro bubble generator 
 Seeding rakes : Dispersing the seeding smoke with uniform density. It is especially useful for a blow down wind tunnel. 

Seeding Generator

Large particle size lquid Seeding Generator

You can see by side scrolling.

CTS-1000 and CTS-4000 
Next generation seeding generator .

CTS-1000 can generate a large amount of uniform oil mist of about 3 microns. Although the measurement range was limited due to the limit of scattered light intensity so far, using CTS - 1000 makes PIV measurement in a wider range possible. Moreover, it becomes possible to suppress the laser intensity, and safer measurement becomes possible with cost reduction.

Probe length, wavelength range, viewing angle, observation direction, magnification etc. can be selected.




Specifications
Oil used DOS
Driving medium Compressed air ( about 4 atm )
Vomit amount 3 liters per second
Particle size About 3 microns
Particle size adjustment Possible
External dimensions H : 446 mm X W : 200 mm X D : 250 mm
Weight about 8.2 kg

It is possible to generate a uniform and large amount with a particle size of about 3 μm.

Compared with conventional products, PIV measurement in a wider range is realized.     

Comparison of PIV measurements with CTS-1000 and Raskin nozzle type.

RASKIN Nozzle type seeding particle generator PIV Part series

You can see by side scrolling.

PIV Part series Part14/Part40 
It is a seeding particle generator for air flow measurement, especially suitable for measurement requiring large amounts of seeding such as high speed air flow and large wind tunnel.

■ Small and uniform droplet particles with a particle size of approximately 1 micron
■ Differential pressure drive allows seeding in low pressure field and high pressure field




Specifications
Method Raskin nozzle
Pressure difference 0.5 ~ 1.0 bar
Inner container pressure ~ 4 atm
Supply air flow PIV Part 14: ~ 7.5L / h / PIV Part 40: ~ 25 L / h
Supply air pressure 5 ~ 8 atm 1 Degree ( when used at atmospheric pressure )
Particle size about 1μm
Number of nozzles PIV Part 14 : 14  / PIV Part 40 : 40
Solid seeding particle generator PIV Solid series

You can see by side scrolling.

PIV Solid series Soloid3/Solid10
Solid seeding particle generator for combustion measurement.
Compared to conventional products, it has excellent dispersibility, discharge stability, and is ideal for measuring combustion fields.

■ Extremely dispersibility to crush agglomerated particles almost completely

■ Stable discharge volume
 Stable seeding in high pressure field




Specifications
Inner container pressure PIVSolid 3 : ~ 6 bar / PIV Solid 10 : ~ 20 bar
Supply air flow PIV Solid 3: ~ 3 bar MAX 
PIV Solid 10 : ~ 10 bar MAX
Usable particle TiO2、SiO2 etc...
Particle 0.5

Seeding Rake

Seeding Rake SR-2315

Seeding rake SR-2315
Seeding rake is used for spreading seeding evenly and efficiently.Ideal for spot-based measurements in wind tunnels and high-density seeding.
Diffusion of seeding particles evenly is very important for the accuracy of PIV.
In order to diffuse uniformly, global seeding that scatters the whole wind path is the best method.If you keep spreading seeding from the downstream position of the measuring part of the wind tunnel, the whole air passage will be filled with seeding particles.For PivPart 45 it will be ready for measurement in a few minutes even in a large wind tunnel.
 However, with this method, a large amount of seeding particles will be forced into the air duct for a long time.This method should be avoided as much as possible considering the impact on the wind tunnel.So we use seeding spray porous nozzle called seeding rake.Seeding rake is a collection of multiple tubules with pores opened.We will install it just after the rectification cave and spray it.Uniform seeding is possible without affecting the flow, and it is possible to do with the minimum necessary seeding amount.It can correspond to various sizes and uses.

Other Components

In combustion measurement by LIF, it is possible to identify acetone, OH, CH, NO among gas molecular species.It is also possible to measure their instantaneous distribution. Especially, planar LIF measurement by image is called PLIF (Image Laser Induced Fluorescence, Planer Laser Induced Fluorescence).  The basic optical system for observing LIF is shown in the figure.

We provide all components such as timing controller which is indispensable for PIV measurement,Scheimpflug mount required for stereo PIV imaging and Calibration target.In addition, we can also produce traversers etc. according to demand.
 Timing controller
 DT Accretate
 Scheimpflug camera mount
 Calibration target                             

Timing controller

Timing controller

You can see by side scrolling.

Timing Controller TT1680/LC880

Koncerto supports TT1680 and LabSmith LC880. TT1680 has 8 physical output channels, 8 logical output channels and 8 input channels. LC880 has 8 output channels and 8 input channels.

■ 
Synchronization control of pulsed laser and various cameras

■ 
Synchronous measurement of rotating machine such as engine

 
Construction of PIV system · LIF system etc

 Synchronous imaging and measurement in ballistic test
 
Synchronous measurement in impact wind tunnel



Specifications
Timing processor trigger pulse delay Min 50ns / Max 1370 sr
Trigger pulse width  Min 7.7 μs / Max 1370 s  
 Delay・pulse resolution  Min / Max 10 ns
 Delay・pulse width resolution Min / Max 10 ns 
 Delay pulse width jitter from asynchronous source 10ns 
 Delay pulse width jitter from internal source  Max 200 ps / Typ 50 ps ( 0 ~ 50 ℃ )
 Timing absolute accuracy Max 0.1 % / Typ 0.01 % 
Internal timing Min 1.5626 MHz / Max 100 MHz
External timing Min 1 MHz / Max 100 MHz
External trigger pulse width 50 ns

DT Accretate

DT Accretate ( Optional functions of Koncerto II )

 Δt The automatic correction function is a function to guarantee high accuracy with measurement requiring a very small Δt, such as ultra high-speed flow and high-speed flow of minute scale.
 For super high-speed flow, high-speed flow of minute scale, etc., it is necessary to shorten the interval (Δt) of double pulse to 100 nanoseconds or less.In such a time scale, errors in the build-up time of the laser and various timing-based minute errors become relatively large, and the difference between the set Δt and the actual laser pulse interval may reach 10 to 20%.
 Δt The automatic correction function is a function to directly measure the interval of the actual double pulse laser light with a high speed photodetector and automatically reflect the measured value to the speed calculation value.
This enables high precision measurement similar to ordinary measurement even in super high speed flow.
 System configuration
 High speed photo detector
 Double pulse interval measurement unit

Build-up time error

 The build-up time is the time from the input of the Q switch signal by the pulse laser until the laser pulse is actually oscillated, which is about 20 to 70 nanoseconds depending on the model.
 The build-up time varies slightly depending on the oscillation state of the laser.
 Because double pulse laser uses two independent lasers, there may be difference in build up time of individual lasers, this time difference is build up error.
Since the build-up error becomes relatively large in the measurement of ultra-fast flow such as Δt less than 100 nanoseconds,it is necessary to measure and correct the interval of actual laser pulse light.    

Camera mounts

Scheimpflug camera mounts SCM-1
Scheimpflug Camera Mount is a camera mount for accurate focus adjustment of the entire area of the shooting area with stereo PIV.
In stereo 3D PIV, Camera views the light sheet from an oblique angle. Scheimpflug camera mount ensures all the areas of off-normal object plane in focus. Rotation axis is on the center of the sensor. It ensures no image offset when aligning the Scheimpflug angle.

Features

 Robust design for image measurement.

■ Mounted so that the tilt rotation axis for Shine Flush angle adjustment is coaxial with the sensor center axis.Even if the Shine Flag angle is adjusted, the field of view will not move to the right or left and alignment is easy.

 Even when the camera is detached from the Scheimpflug Mount by a high-precision camera mounter and used as a single unit and mounted again, the Scheimpflug swing axis and the sensor center axis precisely match with each other. (※1)

■ It can be fixed stably even with a large high speed video camera.

■ Most of the cameras supported by Koncerto II can be mounted by the height adapter plate.

■ Select the height adapter plate at the time of purchase.

■ An inverted mount is also possible. For example, in measuring the flow under the floor of an automobile, it is necessary to install the camera at the height of the floor. In such a case, it is possible to arrange a Scheimpflug mount on top of the camera and hang it from above.

■ Electric options are also available.

※1 
In order to create a Scheimpflug condition, you will wilt the lens or camera, but the field of view will be shifted to the left or right even if you touch it. In the stereo PIV, the target center is aligned with the center of the field of view in order to maximize the resolution, so if the field of view is shifted by adjusting the Scheimpflug angle, the field of view must be returned. Since the Scheimpflug angle also changes by returning the field of view, it is necessary to repeat the operation to drive it.Especially at super high resolution cameras the frame rate is also slow, skill is necessary for this work. The SCM - 1 is adjusted for each camera at the time of shipment so that the center axis of the tilt and the sensor center axis of the camera accurately coincide.Therefore, even if you adjust the tilt, the field of view will not be shifted and alignment will be completed easily with one adjustment.

Calibration targets

Camera calibration Target
Camera calibration is very important for accurate PIV measurement in stereo 3D-PIV and 2D-PIV with distorted images. Flat and multi height, double sided types of many sizes are available.There are flat type and multiple section type.Various sizes and dot densities are prepared for each, and it can be selected according to the application.

 Flat target (single side type, double side type)
Planar targets must traverse about 3 to 5 cross sections in the out-of-plane direction.This type issuitable when traverse is possible and precision is pursued.Increasing the traverse cross section increases accuracy.One side type is used when both of the cameras are installed on one side of the light sheet.Double sided type can be used with pinched camera arrangement.Travers can also be powered and automatically controlled by Koncerto. 
  Ultra large lightweight target
2000mm ~ 2000mm is available. Please contact us.

 CLP type double-sided multi-section target
Traverse is unnecessary target.This type is convenient when traverse can not be performed in a closed space, or when there is no such window that the image is distorted between the camera and the light sheet. Generally this type is suitable for wind tunnel.In the conventional double-sided, multi-section target, the height of the lower surface of both sides does not match due to the thickness of the plate, so it is necessary to correct the focus after the calibration in the calibration of the pinch camera arrangement, which causes the error It was getting.Since the height of the low surface of the CLP type is the same on both sides, high precision calibration is possible.In addition, since the dots on the high surface and the dots on the low surface are alternately arranged, the interpolation accuracy by software becomes uniform.

 CLP-DPDS
Double Plane Double Side type. It has common lower plane which ensures the accurate camera calibration when the cameras are located on both sides of laser light sheet in Stereo 3D-PIV 

 SPDS
Single Plane Double Side Flat type. This type requires target traverse to record multiple height of images.But it ensures accurate measurement.

 

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 Specifications
 Model name  Target Type  One side / both sides  Dot sense size※ 
SPSS-SD-micro-size  Plane (for micro PIV)  One side standard   1 mm ~ 5 mm
 SPSS-SD-size Plane   One side  standard  5 mm ~ 1000 mm
 SPSS-HD-size  Plane  One side  High density  20 mm ~ 1000 mm
 SPDS-SD-size  Plane  both sides  standard  5 mm ~ 1000 mm
 SPDS-HD-size Plane   both sides High density   20 mm ~ 1000 mm
 CLP-DPDS-size  CPL type multi-section  both sides  standard  20 mm ~ 1000 mm





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