**The “Stress Monitoring and Temperature Measurement Method and System Based on Fiber Bragg Gratings”, independently developed by the Electric Power Research Institute of the Energy Group, has been granted a **patent license**

Thread Content

On April 3, the \"Stress monitoring and temperature measurement method and system based on fiber Bragg gratings\", independently developed by the Electric Power Research Institute of **Energy Group**, was granted a **patent license**. This technology enables the acquisition of dual-parameter information on stress and temperature in high-temperature and complex environments, allowing for precise distributed measurements across all areas inside and outside the boiler over a wide temperature range. It effectively addresses the issues associated with traditional thermocouples, such as limited measurement accuracy, poor reliability, and difficulties in maintenance, thereby providing a more reliable technical foundation for the flexible and safe operation of power plant boilers. Recently, the “Stress Monitoring and Temperature Measurement Method and System Based on Fiber Bragg Gratings” independently developed by the Boiler Inspection Company of the Electric Power Research Institute was granted a **patent license. This technology enables accurate measurement across all scenarios inside and outside the boiler, over a wide temperature range, on a distributed basis. It effectively improves the operational stability of coal-fired power units during load changes and rapid start-up and shutdown processes, laying a technical foundation for the advancement of next-generation coal-fired power units with advanced, flexible peak-shaving capabilities. This in turn promotes the high-quality development of the coal power industry in a direction that is cleaner, more efficient, and more flexible and intelligent. The R&D team focuses on the industry-specific challenges faced by boiler heating surfaces during the deep and flexible peak-shaving operations of coal-fired power units, such as large temperature fluctuations, complex stress changes, and high risks to safe operation. By integrating multidisciplinary technical approaches, they carry out research on core technologies for the safe and coordinated control of boiler heating surfaces, as well as related engineering applications. This technology utilizes microstructured fiber gratings, taking advantage of their inherent properties such as high temperature resistance, strong immunity to electromagnetic interference, and high precision. By combining these features with the photosensitivity of fiber materials, it enables accurate distributed temperature measurement and real-time online monitoring in high-temperature and complex environments such as boiler heating surfaces, thus allowing for precise assessment of the condition of those heating surfaces. This technology effectively addresses a series of issues present in traditional solutions, such as limited temperature measurement accuracy, insufficient reliability, short service life, and difficulties in installation and maintenance. It provides strong technical support for optimizing equipment operation and assessing safety conditions, thereby significantly enhancing the operational safety and reliability of the boiler heating surfaces in coal-fired power units under deep peak-shaving operating conditions. This technology is based on a key research project under a sub-project of a major research and development program. It represents an important achievement by the Boiler Inspection Company of the Electric Power Research Institute in its pursuit of development through technological innovation and in its efforts to enhance safety measures in the power industry. It not only expands the company’s intellectual property portfolio in the field of safety monitoring but also underscores its core capabilities in the research and development as well as practical application of technologies for safety monitoring of coal-fired power equipment. The boiler inspection company will continue to advance various research efforts related to this project, accelerate the transformation of technical achievements into practical applications in real-world settings, and ensure that these research results are put into use effectively, serving as a model for the industry.