FPGA based electromagnetic ultrasonic pulse compression detection system paper + source file

Resource download address ：https://download.csdn.net/download/sheziqiong/85749842
Resource download address ：https://download.csdn.net/download/sheziqiong/85749842
Catalog
be based on FPGA Electromagnetic ultrasonic pulse compression testing system 1
The first part Design Overview 1
1.1 Design purpose 1
1.2 Application field 2
1.3 Main technical features and innovations 2
1.4 Key performance indicators 2
The second part System composition and function description 3
2.1 Introduction to the whole system 3
2.2 Pulse compression principle 3
2.3 Hardware circuit design 8
2.3.1 Receiving circuit and ADC Acquisition module 8
2.3.2 Transmitting circuit and high voltage module 8
2.3.3 Electromagnetic ultrasonic transducer 9
2.4 ZYNQ Programming 10
2.4.1 PL End transmitter module design 10
2.4.2 PL End acquisition module design 10
2.4.3 PL End interaction module design 11
2.4.4 PS End pulse compression processing algorithm design 13
2.4.5 Thickness calculation module 14
2.4.6 Result display module 15
The third part Completion and performance parameters 16
The fourth part summary 20
2.5 Scalability 20
2.6 Experience 20
The fifth part reference 21
The sixth part appendix 22
end 22
end 23
The first part Design Overview
1.1 Design purpose
Compared with the traditional piezoelectric ultrasonic technology, electromagnetic ultrasonic technology does not need coupling agent , It can realize many advantages such as non-contact measurement . However, due to the low efficiency of electromagnetic ultrasonic energy transfer , The echo signal generated by a well matched transducer is generally only tens of microvolts , This seriously limits the development and application of electromagnetic ultrasonic technology . Pulse compression technology is widely used in radar signal processing , It can effectively improve the signal-to-noise ratio of radar signal , Improve radar range resolution and anti-jamming performance . Therefore, this design is based on ZYNQ-7020, Build an electromagnetic ultrasonic thickness measurement system , And apply pulse compression technology , Effectively improve the signal-to-noise ratio of echo signal , Realize accurate thickness measurement of metal specimen .
1.2 Application field
The electromagnetic ultrasonic thickness measurement system can accurately measure the thickness of metal specimens , And the thickness for the pipe 、 Pressure equipment and other metal materials are of great significance ： The thinning of thickness is easy to cause cracks 、 Fracture and other defects , Thus leading to major safety accidents such as explosion . therefore , Test the thickness of metal products , For ensuring the healthy and stable operation of industrial equipment , It is of great significance to promote high-quality industrial development . Electromagnetic ultrasonic technology has the technical advantage of no ultrasonic couplant , Non contact measurement can be realized , Therefore, it is also suitable for high-speed mobile automatic detection scenarios .
1.3 Main technical features and innovations
(1) Electromagnetic ultrasonic thickness measurement system does not need ultrasonic couplant , The surface treatment of the test piece is not required during the test , Relative piezoelectric ultrasound , The measurement process is simplified , And has a wider range of applications . (2) Using pulse compression technology , Complementary gray code is selected as the encoding method , Theoretically, the code length can be infinite , A long enough coding sequence can be obtained by a reasonable construction method , It can significantly improve the signal-to-noise ratio of the echo signal . (3) be based on ZYNQ-7020 Build an electromagnetic ultrasonic thickness measurement system , Give full play to FPGA And embedded , Extensibility is strong , It can be further developed into a portable instrument , It has high commercial value .
1.4 Key performance indicators
The design of this paper is based on ZYNQ-7020 The electromagnetic ultrasonic pulse compression detection system has the following technical characteristics
mark ：
(1) Test object ：5-100mm Thick metal test piece
(2) Thickness measurement accuracy ：≤0.2mm
(3) Detection speed ：≤10s
(4) Signal-to-noise ratio ：≥6dB


















Resource download address ：https://download.csdn.net/download/sheziqiong/85749842
Resource download address ：https://download.csdn.net/download/sheziqiong/85749842