In the PIV system, a laser is used as the illumination source, and a high-power Nd: YAG laser with a pulse frequency of 15Hz and an energy of 200 millijoules per pulse from NewWave Corporation in the United States is employed. The main parameters of the laser are as follows:

Laser model

YAG200-NWL_532/266

name

NewWave produces dual neodymium: yttrium aluminum garnet laser from the United States

laser power

200 mJ/ Pulse@532nm ；30mJ/ Pulse@266nm

Laser pulse frequency

15Hz

Pulse Duration

3—5 ns

Beam Diameter

6 mm

Divergence angle

Less than 4 mrad

way of working

Self triggered, externally triggered, controlled by synchronizer

Input power requirements

Single phase input 220V ± 10%, maximum current 20A, 50/60 Hz

notes

The laser (including power supply) is covered by a one-year warranty from the manufacturer

The function of the light arm is to flexibly adjust the position of the sheet light source to meet the flexible adjustment of the sheet light source when measuring different cross-sections. The film light source lens is used to form the illumination light path system of the PIV system. The working principle is that the laser pulse beam generated by the pulse laser first passes through a concave cylindrical mirror to form a fan-shaped light sheet at a certain angle. The thickness of the light sheet is about 4mm, which is too thick for PIV measurement. Therefore, an additional spherical mirror is needed to shrink the light sheet to a thickness of 0.5-1mm. In order to meet the needs of different sizes and measurement distances, two lens groups are used in this set of lenses, namely two different concave cylindrical mirrors and two different spherical mirrors.

The main parameters are as follows:

model

610015 610021

name

Optical arm and sheet light source lens group

Maximum Input Power

500mJ/Pulse

component

A set of multi joint light arms (each joint can rotate 360 degrees, full

Expand up to 1.8 meters long)

A set of lens bases

Two spherical mirrors: focal length 500mm, 1000mm

Two cylindrical mirrors: focal length -25mm, -15mm

A set of adapter for connecting cylindrical mirror to spherical mirror

The CCD of TSI's PIV system is specifically designed for use in PIV system measurements. It is different in terms of working timing

Compared to ordinary camera structures. The main parameters are as follows:

model

630062 630062-ST

name

PowerView Plus 11MP autocorrelation/cross-correlation CCD camera

resolution

4K X 2.6K

Zhen frequency

4.8 frames per second

Lens interface method

Standard Nikkon (F Mount)

control mode

Free Run/Triggered Exposure/Triggered Double Exposure

12 bit grayscale image data

Minimum cross frame time

200ns

output

12 digit digital output, output signal standard LVDS

CCD includes CCD array laser protective cover

remarks:

Includes dedicated high-speed interface board and all cables for matching

1.630062 CCD matching interface board, one piece

2. Support LVDS data transmission standard

3. Fully digital data transmission

The synchronizer is the timing control mechanism of TSI's PIV system. The working instructions of all other components of the system are controlled by a synchronizer, which is responsible for setting each component according to the program.

model

610035

name

synchronizer

way of working

Controlled by computer;

Connection method with computer

RS232；

Time resolution

1ns

output signal

TTL level;

A pair of FlashLamp and Q-swithch signals;

External trigger signal output to control other external devices;

Phase locked loop signal input;

Input power

240VAC，2A

attachment

Regarding a set of cables;

One set of installation and usage instructions;

name

Stereoscopic PIV/LIF Image Acquisition and Data Analysis System

function

Windwos XP full 32-bit software package, the system is controlled by computer commands through RS232;

For CCD mode, real-time display of sampled image data, online display of directional vectors and scalar fields;

Perform cross-correlation and autocorrelation analysis; Support parallel related processing with multiple CPU architectures

Embedded Hart related algorithm engine, supporting Hart related processing, ultra-fine processing of flow field velocity distribution, with a minimum achievable query domain of 4 × 4 pixels to obtain a velocity vector

Can perform conventional image processing on images;

Can process images obtained from different types of film light sources;

Real time display of query domains and their related peak values;

Automatically adjust the size of the query domain to obtain the best correlation peak;

Calculate the velocity of points, lines, partial areas in the image, and all areas;

Post processing can calculate average velocity, root mean square value, vorticity, shear stress, Reynolds stress, etc; Conduct validity testing on the velocity vector field and fill in the blanks for the missing vectors.

Built in (embedded in Insight software) TECLPOT flow field analysis and drawing software;

Using patented background processing technology and detailed temporal image analysis based on Matlab toolbox

notes

This software contains an Insight3G-PIVLIF software encryption dongle;

Speed range

The maximum measurable speed is not less than 200m/s

Measurement area

Not less than 600mm * 400mm

spatial resolution

Less than 1mm * 1mm (determined by the lens field of view)

Dimension of speed measurement

3 dimensions