The laboratory has the domestic first-class, international advanced scientific research equipment and hardware platform, the main scientific research and experimental platform is as follows：

(1) Ultrasonic Scanning Theory and Technology

1. Ultrasound Scanning Theory and Technology
   Ultrasound technology could scan and test the internal state of the opaque meterial. The relevant device can generate A/B/C scanning image and achieve six-axis control. With the A/B funcion, the nondestructive testing for workpiece with arbitrary-shaped profile could be implemented. The main application is to measure the internal structures and detect the internal flaws.
2. Scanning Acoustic Microscopy(SAM)
   The acoustic microscope employs high-frequency focused ultrasound probe, based on the principle of ultrasonic testing, making it possible to observe the microscopic image of the opaque objects in the surface, sub-surface and the internal fine structure in certain depth and find out the the particles, cracks, delamination, voids, bubbles, porosities and other defects. With research and development, the ultrasonic microscope at present can be applied to the detection and failure analysis in the field of semiconductor and electronic packaging, circuit board welding quality, biomedical and other fields of nondestructive testing and observation.
3. Nondestructive Testing Robotically(NDTR)
   Variable thickness curved Specimens are widespread application in the vehicle, mold and other industrial fields, automatic ultrasonic testing in this area to achieve high precision, high efficiency, high reliability is the cutting-edge research topics in recent years.As the ultrasonic propagation in the medium has a strong directivity, Curved Surface ultrasonic testing requires the position and orientation of the probe adjustment with the shape of the specimen timely, which is a new challenges to the non-destructive testing. The better way to achieve NDT implement is to scan the curved and complicated components robotically and automatically.

(2) Characteristic Measurement and Calibration of Ultrasonic Transducer and Testing Instruments

1. Characteristic Measurement Theory and Technology of Piezoelectric Ultrasonic Transducer
   The device consists of ultrasonic pulse transmit/receive instrument, data acquisition cards, hydrophones, high-frequency voltage and current sensors, scanning and motion control system and computer hardware and software. This technology could measure the time-frequency response, electrical impedance and sound field characteristics.
2. Characteristic Measurement and Calibration of Ultrasonic Testing Instruments
   This technology could implement the testing and calibration for the ultrasonic pulse transmitter/receiver and the input and output characteristics of the board. Its technical target has reached advanced level around the world.
3. Characteristic Calibration Techniques of The Acoustic Emission Transducer
   Characteristic calibration techniques of the acoustic emission transducer effectuates the sensitivity spectrum measurement of the acoustic emission transducer, in accordance with the ASTM E976 and ASTM E1781 standards, put the Secondary Calibration of the acoustic emission into execution. The Primary Calibration of Transducers used in the experiment are provided by the National Institute of Metrology，USA.

(3) Ultrasonic Nondestructive Measurement Techniques of the Material Properties

1. Ultrasound Measurement Theory and Technology of Elastic Modulus
   In the research aspect of magnetic excitation ultrasonic theory and technology for modulus of elasticity,the process of ultrasonic wave propagation in stepped slender rod and the theory relationship of the magnetostrictive excitation/receiving are provided. A magnetostrictive transducers for special purpose was produced.
   Through this technology, the quick and accurate measurement of shear modulus G and Young's modulus E in (1～5) mm small sized solid material on the scene was achived. The measurement range of G and E values could get （10～160）Gpa and （5～390）Gpa respectively. And the uncertainty is below 1%, the response time is less than 1 second. This technology has reached international advanced level.
2. Residual Stress Measurement Theory and Technology
   Taking advantage of the surface and subsurface residual stress sensitivity of ultrasound critically refracted longitudinal wave, as well as nonlinear characteristics of the ultrasound propagation due to the residual stress, measring technology and portable devices for the component surface residual stress used on the scene were developed, and successfully used for the welded residual stress detection and in service pipeline residual stress detection in the West-East natural gas transmission project.
3. Ultrasonic Testing Theory and Technology for Composite Material Characteristic
   Making use of ultrasonic guided wave technology, the detecting of the internal defects and the bonding characteristics of multilayer composites could be achieved. This technology could also measure the porosity, elastic modulus, residual stress and density distribution and other properties of the composites. it has a high sensitivity.

(4) Geometric measurement theory and technology

1. Measurement Theory and Technology of The Deep-Hole Integration Parameters
   Using ring geometry laser image measurement method combined with satellite remote sensing technology, this technology could measure the three-dimensional shape profile, flaws, geometries, twist degrees and many other parameters in the deep hole. The applicant put forward the deep-hole morphology detection theory and method base on ring laser projection and image detection. At the same time, put forward the wear quantitative detection theories and methods for measuring the deep hole, developed a synthesized parameter photoelectric detector using for deep hole. The equipment consists of ring laser, optical system, image acquisition and other components, eliminating the rotary mechanism. This technology has solved the synthesized high-precision measurement problems of three-dimensional morphology, parameters, defects and wear levels, which hadn’t been achieved at home or abroad before this.
   The technology can not only achieve a deep hole multi-parameter detection, but also be extended to the morphology and size detection for the amount of deep hole parts and complex curved surface, playing an improtant role in the development of the deep hole detection technology.