Bojiong (Shanghai) Precision Machinery Technology Co., Ltd
Bojiong (Shanghai) Precision Machinery Technology Co., Ltd
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Transient Aerodynamic Flow Field
  • Transient Aerodynamic Flow FieldTransient Aerodynamic Flow Field

Transient Aerodynamic Flow Field

When simulating aircraft flight and conducting a series of tests, you can utilize the Transient Aerodynamic Flow Field introduced by BOJIONG. We are actively developing and expanding the application field of interferometric measurement technology to ensure that our products continue to evolve and meet the diverse needs of our customers.

The Transient Aerodynamic Flow Field, a digital detection device with strong anti-interference capabilities, high resolution, and large distortion, is equipped with an ultra-high-speed camera. It provides strong support for wind tunnel testing, flow field simulation, and enhancing the safety and efficiency of aircraft flight. BOJIONG has developed an external four-wave interference sensor with independent intellectual property rights (model: FIS4-EX1), which uses a 4f imaging system to image the encoded grating onto the user's dedicated camera through external access, thereby achieving more precise measurements.


Item Specification:

 

product name

Transient Aerodynamic Flow Field

Application wavelength and light source

Visible light 527nm

Pulse main operating frequency

1-1000Hz

Effective measurement of wavefront caliber

Not less thanφ80mm

Object distance

1.5m~4m

Spatial resolution of distorted wavefront measurement

≤1mm

Distorted wavefront measurement range

±10λ

Inaccurate wavefront measurement

RMS≤(1/15)λ、PV≤0.2λ

Measurement sensitivity

1/15λ

Detector pixel

1280×1024

The system collects the frame frequency

Programmable, maximum frame rate is not less than 450Hz

High-speed sampling synchronization control

Laser pulse width≤30ns

The laser light source pulse signal and the detector acquisition signal are the same step

Adopt TTL signal standard interface

 

Feature Of BOJIONG Transient Aerodynamic Flow Field

 

 

 

【Anti-interference】

The aeroptically distorted wavefront measurement system for high speed flow around the flow field utilizes a modern common path with spatial phase modulation Shear interference system, whose linear carrier can effectively control the external environmental interference

【Digital detection with high resolution and large distortion】

CCD image acquisition system equipped with high resolution (1280×1024 pixels), high-speed data transmission to achieve high resolution digital detection, high resolution - high linear carrier - large distortion detection. A high speed wave front diagnosis package with scientific and rich measurement results is provided.

【High-speed signal acquisition】

With a near-infrared DPSS laser that can adapt to both transient and integral states with continuous and pulsed, high-speed signal acquisition can be realized, with a maximum frame rate of no less than 450Hz. An external synchronous signal acquisition system is developed and equipped to complete the synchronous acquisition of signal between the target variable flow field and the high-speed target detector.

 

Application Of BOJIONG Transient Aerodynamic Flow Field

 

This BOJIONG Transient Aerodynamic Flow Field suitable for sampling cameras with various special requirements, various fluorescence imaging in the biological field, and in the field of high-speed image acquisition, stripe cameras and various high-speed cameras will be used.

 

Wavefront distortion index detection

Flow field interference fringes of Mach disk collected in wind tunnel

Mach disk local detection diagram

Mach disk local detection diagram

 

 

 

 

 

BOJIONG Transient Aerodynamic Flow Field Details

 

Professional software module

◆Real-time dynamic acquisition display, easy to dynamically observe 3D waveform changes

◆  Friendly software interface including 3D topography display, contour map display, PV, RMS, POW and other numerical display

◆The measurement area can be freely selected round and square, and can be freely adjusted after selection

◆It can measure the height value curve and calculate the region roughness and other numerical parameters by pulling the wire


 

 

BOJIONG Transient Aerodynamic Flow Field developed by a team of professors from Zhejiang University and Nanyang Technological University of Singapore, with domestic patented technology, it combines diffraction and interference to achieve a common four-wave transverse shear interference, with superior detection sensitivity and anti-vibration performance, and can realize real-time and high-speed dynamic interferometry without vibration isolation. The real-time measurement shows a frame rate of more than 10 frames. At the same time, the FIS4 sensor has an ultra-high phase resolution of 512×512 (260,000 phase points), the measurement band covers 200nm~15μm, the measurement sensitivity reaches 2nm, and the measurement repeatability is better than 1/1000λ (RMS). It can be used for laser beam quality analysis, plasma flow field detection, real-time measurement of high-speed flow field distribution, image quality evaluation of optical system, microscopic profile measurement and quantitative phase imaging of biological cells.

 

 

 

 

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