Fundamentals of Engineering Testing Technology Huazhong University of Science and Technology

Engineering testing technology is a professional basic course for mechanical majors. The content involves various common physical quantities in the fields of industrial automation, mechanical processing, building control, transportation, modern agriculture and medical instruments, such as: temperature, sound, brightness, pressure, magnetic field strength, Sensor measurement principles such as distance and vibration; as well as commonly used measurement signal analysis methods such as waveform analysis, spectrum analysis, amplitude domain analysis and correlation analysis of sensor measurement signals. In addition, it also includes knowledge of sensor signal amplification, signal modulation and demodulation, signal filtering and computer virtual instruments.
Testing technology is the foundation of all automated measurement equipment and instruments such as CNC machine tools, industrial robots, driverless cars, smart agricultural greenhouses, and electrocardiographs; its role is equivalent to the senses of the machine. Machines and automated measurement equipment and instruments can only be equipped with sensors. Effectively perceive the external world, use signal analysis methods to extract decision-making information such as obstacle distance and machine resonance frequency, and make next automated operations and responses.

This course adopts a practical learning model of learning by doing. In the sensor section, while explaining the theory, the teacher listed many sensor application projects implemented with Arduino; you will have the opportunity to use a thermal resistor + Arduino/STM32 card to implement a small thermometer; you will also have the opportunity to design and implement a small thermometer. Ultrasonic ranging radar and other small applications; improve your understanding of sensor knowledge and practical application capabilities.

In the signal processing part, the teacher uses Matlab to assist teaching and provides example codes for common signal analysis methods. You will have the opportunity to program and practice various common signal analysis methods and small applications based on the sample codes. , such as using a sine wave signal generator to implement a small electronic keyboard, using Fourier transform to implement a computer microphone sound signal acquisition and spectrum analyzer, using filtering knowledge to implement an MP3 equalizer, etc.; improve your understanding and synthesis of signal analysis theory Application Ability.

• Chapter 1：Tutoring (15 minutes and 46 seconds)

• Chapter 2：Basic concepts of testing technology (9 minutes and 31 seconds)

• Chapter 3：Engineering Applications of Testing Technology (14 minutes and 0 seconds)

• Chapter 4：Development Trends in Testing Technology (8 minutes and 46 seconds)

• Chapter 5：Classification and description of signals (13 minutes and 48 seconds)

• Chapter 6：Sampling theorem (13 minutes and 3 seconds)

• Chapter 7：Functions commonly used in signal analysis (11 minutes and 4 seconds)

• Chapter 8：Generation of standard signals (12 minutes and 27 seconds)

• Chapter 9：Time domain waveform analysis of signals (12 minutes and 42 seconds)

• Chapter 10：Spectral analysis of signals 1 (11 minutes and 4 seconds)

• Chapter 11：Spectral analysis of signals 2 (17 minutes and 59 seconds)

• Chapter 12：Spectrum analysis of signals 3 (11 minutes and 6 seconds)

• Chapter 13：Spectral analysis of signals 4 (10 minutes and 8 seconds)

• Chapter 14：Spectral analysis of signals 5 (19 minutes and 40 seconds)

• Chapter 15：Spectral analysis of signals 6 (19 minutes and 20 seconds)

• Chapter 16：Spectral analysis of signals 7 (16 minutes and 43 seconds)

• Chapter 17：Signal amplitude domain analysis 1 (11 minutes and 50 seconds)

• Chapter 18：Signal amplitude domain analysis 2 (17 minutes and 4 seconds)

• Chapter 19：Signal time difference domain correlation analysis 1 (19 minutes and 17 seconds)

• Chapter 20：Signal time difference domain correlation analysis 2 (9 minutes and 19 seconds)

• Chapter 21：Signal time difference domain correlation analysis 3 (12 minutes and 26 seconds)

• Chapter 22：Signal time difference domain correlation analysis 4 (10 minutes and 54 seconds)

• Chapter 23：Other signal analysis methods (15 minutes and 43 seconds)

• Chapter 24：Overview (13 minutes and 37 seconds)

• Chapter 25：Resistive sensor 1 (16 minutes and 26 seconds)

• Chapter 26：Resistive sensor 2 (14 minutes and 59 seconds)

• Chapter 27：Resistive sensor 3 (15 minutes and 58 seconds)

• Chapter 28：Inductive sensor 1 (11 minutes and 36 seconds)

• Chapter 29：Inductive sensor 2 (13 minutes and 38 seconds)

• Chapter 30：Capacitive sensor. (12 minutes and 6 seconds)

• Chapter 31：Magnetoelectric sensor (10 minutes and 20 seconds)

• Chapter 32：Piezoelectric sensor (9 minutes and 59 seconds)

• Chapter 33：Ultrasonic detection sensor (12 minutes and 34 seconds)

• Chapter 34：Hall effect sensor, photovoltaic effect sensor (9 minutes and 33 seconds)

• Chapter 35：Image Sensor (2 minutes and 29 seconds)

• Chapter 36：Thermocouple (8 minutes and 38 seconds)

• Chapter 37：Fiber Optic Sensor (10 minutes and 4 seconds)

• Chapter 38：grating sensor, biosensor (9 minutes and 27 seconds)

• Chapter 39：Sensor selection principles (7 minutes and 6 seconds)

• Chapter 40：Introduction to test systems, static response characteristics of test systems (13 minutes and 21 seconds)

• Chapter 41：Test the dynamic response characteristics of the system (13 minutes and 31 seconds)

• Chapter 42：Dynamic response of a typical system (17 minutes and 21 seconds)

• Chapter 43：Overview, signal amplification (13 minutes and 54 seconds)

• Chapter 44：Signal modulation and demodulation1 (19 minutes and 26 seconds)

• Chapter 45：Signal modulation and demodulation 2 (12 minutes and 38 seconds)

• Chapter 46：Signal filtering 1 (20 minutes and 57 seconds)

• Chapter 47：Signal filtering 2 (13 minutes and 23 seconds)

• Chapter 48：Signal filtering 3 (16 minutes and 41 seconds)

• Chapter 49：Signal filtering 4 (19 minutes and 13 seconds)

• Chapter 50：Computerized test instrument concept (10 minutes and 51 seconds)

• Chapter 51：Computer Virtual Instrument Technology (19 minutes and 40 seconds)

• Chapter 52：Application Practice of Computer Testing System (17 minutes and 20 seconds)

• Chapter 53：Course Summary 1 (10 minutes and 57 seconds)

• Chapter 54：Course Summary 2 (16 minutes and 44 seconds)

• Chapter 55：Course Summary 3 (15 minutes and 19 seconds)

• Chapter 56：Appendix 1-Matlab signal analysis program design preliminary 1 (22 minutes and 16 seconds)

• Chapter 57：Appendix 1-Matlab signal analysis program design preliminary 2 (14 minutes and 8 seconds)

• Chapter 58：Appendix 2-Arduino sensor signal acquisition application 1 (15 minutes and 49 seconds)

• Chapter 59：Appendix 2-Arduino sensor signal acquisition application 2 (16 minutes and 50 seconds)