Chen Weimin: Research and Development Explorer of Photoelectric Instrumentation

Introduction: He implanted a fiber optic sensor in concrete to make the building structure a "sensory organ." He actively explored and innovated magneto-rheological technology and its applications to broaden the research field; he furthered his practice, verified the theory of LED lighting, and solved practical problems. For the benefit of the people. He is Professor Chen Weimin of the Institute of Optoelectronic Engineering of Chongqing University.

Chen Weimin, a professor and doctoral tutor, enjoys special government allowances. In 1982, 1988 and 1999, she received a bachelor's degree in optical instruments and engineering from Zhejiang University, a master's degree and a doctor's degree in precision instruments and mechanics from Chongqing University, and studied in Japan as a visiting scholar at Tokyo A&M University from 1991 to 1992. Currently, he is Deputy Director of the Laboratory of Optoelectronic Technology and Systems of the Chongqing University, Deputy Director of the Institute of Mechanical and Optoelectronic Systems and Equipment, 985 Platform of Chongqing University, Director of the Optoelectronics and Measurement and Control Technology Research Center of Chongqing University, and Director of Chongqing Optoelectronic Engineering Research Center; Member of Institute of Optics and Optoelectronics (SPIE), Director of China Optical Society, Vice Chairman of Opto-mechanical System Integration Branch of China Instrument and Meter Institute, Deputy Secretary-General of National LED Lighting R&D and Industry Alliance, Chairman of Chongqing Optical Society, LED Lighting Research and Development in Chongqing Secretary-General of Industry Alliance, Director of Optoelectronics Special Committee of Chongqing Electronics Association, Chief of Electronic Technology Expert Group of Chongqing Information Industry Research and Development Center, Vice Chairman of Chongqing Lighting Society.

Prof. Chen Weimin has been engaged in teaching and scientific research for a long time. He has been deeply involved in the research of optical fiber technology and sensing, precision measurement and instrumentation, intelligent structure and systems, and has achieved fruitful results. He has hosted or participated in dozens of national and provincial programs. The research projects have won 7 provincial and ministerial awards, applied for and authorized more than 40 patents, and published more than 300 academic papers in various journals.

Implanting a "sensory organ" into a building

As the modernization of China’s modernization progresses, infrastructure such as bridges, dams, highways, and skyscrapers has risen and has become a global leader. However, with the consequent structural safety problems of infrastructure, and with the peak of China's infrastructure construction, the issue of safe operation and maintenance has become increasingly prominent. However, the traditional technology for periodic manual inspection of infrastructure has not been able to meet the requirements for today's large-scale, complex structures, advanced technologies, and a large number of infrastructure safety operations. These traditional technologies not only have a single technical means, but also have limited detection parameters. Subsequent testing requires a lot of manpower, money and time. The detection results are often affected by objective and subjective conditions such as environmental conditions, operator quality and responsibility, and errors are large, and it is difficult to meet the requirements of structural safety monitoring. Therefore, infrastructure monitoring technology and equipment have become an urgent and long-term security requirement for many infrastructure facilities in China.

To this end, Prof. Chen Weimin integrates information technology into the field of structural engineering, and studies implanting sensors inside the building structure to make them “sensory organs” so that they can “perceive” their own health conditions and conduct self-examinations so that structures can be discovered in time. Potential safety hazards to prevent sudden disaster accidents. In order to be able to “perceive” all kinds of “disease precursors” in the building structure, it must be like a hospital with stethoscopes, electrocardiograms, CT machines, and other types of medical test instruments, as well as displacement, deformation, vibration, and other parameters. Series "sensory organs." Prof. Chen Weimin, with the support of national key funds, national 863, national science and technology projects and other national and provincial-level projects, exerted his expertise in photo-electricity detection and led his team to adhere to more than 20 years of arduous research. He eventually invented laser and fiber optics. Various types of sensors, such as stress, deformation, displacement, cracks, vibration, and settlement, etc., have developed a series of instruments for monitoring the status of infrastructure structures and have obtained nearly 20 patents and have filled many gaps. He implanted fiber-optic sensors in concrete, implanted photoelectric sensors in bridges, and installed laser sensors in high-rise towers. He also conquered the technical bottlenecks of the system's field applications and long-term reliability, and enabled the structural engineering community to give "sensing organs" to building structures. "The dream gradually came to reality.

So far, the sensor system for structural condition monitoring developed by Prof. Chen Weimin has gradually evolved from sensors, systems, and instrument series. This has enabled the building structure to have “sensory” and “nervous” structures that can “diagnose” structural “diseases” on their own. Dreams also come to reality step by step. The results were successfully applied to more than a dozen different types of oversized bridges and blast furnaces in Chongqing, Sichuan, Henan, Hubei, and Zhejiang, and achieved great social and economic benefits. They were widely recognized by society and they also obtained three. Provincial and ministerial awards.

Because this technology can enable bridges, highways, tunnels, high-rise buildings and other management personnel to complete the long-term, real-time, and automatic monitoring of the infrastructure in place, timely detection of structural anomalies, early warning of potential structural safety accidents, and substantial increase in infrastructure The detection efficiency and lower maintenance costs have great potential social and economic benefits. Therefore, Chen Weimin is determined to lead his team to continue his efforts to carry forward this advanced technology in order to completely remove the safety hazards of infrastructure operation and ensure the safe operation of infrastructure. Make more contributions.

Smart structure technology solves vibration problems

In vehicles, trains, ships, and buildings and other devices and facilities, the vibration of the structure will reduce the comfort of ride, the safety of the structure, and even cause major damage to the structure. Therefore, how to suppress the harmful vibration of the structure becomes a problem for mechanical engineers. Puzzles. The active control technology of structural vibration is a frontier topic in international research. The use of magneto-rheological material damping controllable features to achieve active control of structural vibration is a more promising method in the automotive industry, machinery manufacturing, hydraulic The areas of control, robotics, and building structures have demonstrated broad application prospects. Professor Chen Weimin and his team have followed the international frontier and conducted more than 10 years of research in this field.

Under the support of more than 10 national and provincial funds and research projects, including the National Natural Science Foundation of China, the National 863 High-Tech Project, the Chongqing Natural Science Foundation Project, and the National SME Innovation Fund, Professor Chen Weimin’s team has developed A magneto-rheological damper for automobiles and 4 million endurance tests were passed. A prototype of an automotive magneto-rheological suspension system was developed. The prototypes of domestic mini-buses and cars were successfully implemented, respectively, reducing the vertical vibration of automobiles by 20 to 20 30%, and passed nearly 10,000 kilometers of actual driving assessment, to achieve satisfactory results.

Magneto-rheological technology not only has unique advantages in terms of damping, but also can be used in applications such as transmission and processing, and can meet the special requirements of bionic intelligent materials. Therefore, it is capable of intelligent vibration reduction and active in the fields of machinery, civil engineering, electric power, and navigation. Noise reduction, as well as bionic intelligence mechanisms such as manipulators, robots, and humanoid muscles, have a wide range of potential applications and broaden new directions for the automotive and robotics industries.

Professor Chen Weimin’s team has obtained nearly 20 invention patents and three provincial and ministerial awards in this field.

Illuminate the city with LED

As a new generation of light sources, semiconductor lighting has developed rapidly in recent years and has been highly valued by the industry. Professor Chen Weimin also pays close attention to the development of this emerging strategic industry.

LED lighting industry under a poor and white conditions, in order to gather all forces, as soon as possible to achieve industrial takeoff, with the strong support of the competent authorities, Professor Chen Weimin initiated the establishment of Chongqing LED lighting research and development and industry alliance - this is the first domestic LED lighting industry Local league. He presides over major scientific and technological projects in Chongqing, using technology to lead the development of the industry, promoting the rapid development of the LED industry in Chongqing, making Chongqing an important base for the LED lighting industry in the west, and the first batch of ten cities in the country to start cities. In order to improve the quality of LED products, a LED product testing and design platform was established in Chongqing. It has been tested for more than 10 cities, more than 40 companies and 100 LED lighting products in China. The project provided quality and technical guarantees. It also proposed improved design solutions for many products and promoted technological advancement of products.

In addition, Prof. Chen Weimin also participated in the “Twelfth Five-Year Plan” semiconductor lighting industry development plan for the country and Chongqing; he initiated, participated, and organized the first Chongqing LED Lighting Innovation and Innovation Contest; organized, co-organized and participated in several domestic LED lighting industry. Academic meeting.

In recent years, Prof. Chen Weimin led his research team in the LED tunnel intelligent lighting, LED road lighting, LED vehicle lighting, LED medical lighting, and LED high-power lighting thermal design, LED landscape lighting lighting specifications, LED non-contact Measurements, semiconductor lighting product reliability prediction theory and life test research and other areas have achieved numerous results, a provincial and ministerial level awards, more than 10 patents.

Professor Chen Weimin hopes to use his diligence and wisdom to use LEDs to illuminate cities and rural areas, illuminate thousands of families and benefit the people.