On the morning of October 19, the High Technology Research and Development Center of the Ministry of Science and Technology organized experts to perform field acceptance review on a project under the National High Technology Research and Development Program (hereinafter referred to as 863 Program) undertaken by Yangtze Optical Fibre and Cable Joint Stock Limited Company (hereinafter referred to as YOFC), namely “Development and Application of Advanced Optical fibre Sensor System”. Liu Jinchang, Chief of Advanced Manufacturing Division under the High Technology Research and Development Center of the Ministry of Science and Technology, and the expert panel listened to the project implementation report of YOFC, reviewed the related materials and made field investigation. Through query and discussion, the acceptance expert panel agreed that the research contents as specified in the specification were completed, the project objectives were achieved and the required technical indicators were realized. Therefore, the acceptance expert panel suggested that the project passed the technical acceptance.

The project “Development and Application of Advanced Optical Fibre Sensor System” lasted 4 years from its formal approval in January 2012 and conclusion in December 2015. The project leader is Dr. Xiong Liangming, Deputy Director of State Key Laboratory of Optical Fibre and Cable Manufacture Technology of YOFC. The organizations involved include Yangtze Optical Electronic Company Ltd. (YOEC), South China University of Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Wuhan University of Technology and Wuhan University of Technology Optic Science Company Limited. For the project, YOFC developed the high-precision pressure sensor, time grating displacement sensor, optical fibre sensor, industrial scanning probe microscope test system as well as other advanced core components and systems of sensors, including trans-scale precision measuring system and trans-scale in-situ mechanical test instrument manufactured for digitization. These instruments meet the requirements for precision measurement of location, pressure, temperature, morphology and other basic physical quantities of the high-end equipment manufacturing and industrial instruments, generate demonstration application and capability of industrialization, and satisfy the huge domestic market demands for sensor products.

For the project, YOFC independently developed the novel characteristic fibre and key devices for advanced optical fibre sensor and effectively improved the performance indicators and measurement accuracy of sensing systems; adopted the curing adhesive and framework matching the optical fibre temperature stress, proposed the symmetrically quadrupole winding pattern of fibre bridge and low-tension winding process, accumulated experience in optical fibre ring winding, depressed the shupe effect of optical fibre ring, and improved the temperature stability and accuracy of optical fibre ring; developed the single frequency laser as light source for sensor, improved the sensing performance from source, constructed the high-performance distributed optical fibre temperature and strain sensing system, and realized the demonstration application of on-line monitoring of power cables.

Owing to implementation of the project, YOFC achieved the production of polarization maintaining optical fibre, photonic crystal fibre and rare earth doped fibre as well as the special optical fibre integration technology, manufactured the prototype of distributed optical fibre temperature and strain sensing system and serial novel optical fibre sensor devices, developed the high-speed and high-precision demodulator, intelligent state analysis system and prototype system of intelligent sensing cloud service platform for operating state of mechanical equipment, and realized the distributed on-line monitoring of multiple parameters of operating state of large and complex mechanical equipment, including temperature, pressure, stress strain, acceleration and displacement.