| Laser Ultrasonic Testing System |
| Function Summary |
| The Laser Ultrasonic Testing System is developed independently by Center for Nondestructive Testing and Control, Beijing Institute of Technology. This system is based on the theory of laser ultrasound and combined with six degrees of freedom (6 DOF) manipulator for real-time detection of complex curved surface. It can be applied to nondestructive testing for aeroengine blades and other small complex curved surface defects. |
| During testing, the 6 DOF manipulator clamps component, the laser equipment is fixed in front of the component and laser irradiation on the surface of component for detecting the defect by using ultrasonic surface wave probe. The manipulator posture can be adjusted at any time during testing that is convenient for testing all parts of component. Before testing, set up in advance the excitation voltage and excitation frequency of laser equipment, an external trigger is used for trigging the acquisition card. The software system includes algorithms and software. The acquisition and processing for surface wave signal are controlled on a Visual Studio platform. The main technical features of this system include an external trigger method to control the acquisition card, fast real-time detection, strong controllability, small human disturbance and high detection precision. |
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| Laser Ultrasonic Testing System |
| Technical Features |
| An external trigger method to control the acquisition card |
| Fast real-time detection |
| Strong controllability, small human disturbance and high detection precision |
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| Laser Ultrasonic Testing System Software |
| Specifications |
Output Wavelength: 1064 mm
Output Energy: > 200 mJ
Pulse Frequency: 1-20 Hz
Spot Diameter: ~7 mm
Pulse Width: 10 ns @ 1064 nm
Divergence Angle: 1 mrad
Energy Stability: 1% |
| Technical principle |
| Laser Ultrasonic Detection System generates ultrasonic wave in the material when pulsed laser lasing nanosecond pulse laser and in term of the reflection, scattering and attenuation of workpiece defect for testing. |
| Applications |
| It can be applied to aeroengine blades surface defect inspection. |
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