Recently, under the commission of the Metrology Station of the Highway Science Research Institute of the Ministry of Transport, the joint project carried out by China Communications Second Navigation Engineering Bureau Co., Ltd. and Falusheng Hongsheng Group Co., Ltd. - the embedded fiber optic grating intelligent cable tensioning calibration test - was successfully completed on June 11th at the Engineering Structure Test Laboratory of Jinan Li Chi Testing System Co., Ltd. This test successfully achieved all the scientific research test indicators, providing a solid and reliable experimental basis for the engineering application, measurement calibration and standardization implementation of the new type of intelligent bridge cables.

Bridge cables are the core load-bearing components of large-span cable-stayed bridges and suspension bridges. The accuracy of the cable force, mechanical stability and service durability directly affect the overall structural safety and service life of the bridge. Traditional cables often have industry pain points such as delayed operation monitoring and inability to perceive the force state in real time. However, the embedded fiber optic grating intelligent cables can achieve real-time perception and online monitoring of cable stress, deformation, temperature and humidity by implanting fiber optic grating sensing elements inside the cables, effectively solving the problem of bridge structure health monitoring. It is a core innovative technology in the current field of intelligent bridges and green infrastructure, and has been widely applied in many national key bridge engineering projects. The precise tensioning calibration test is the core pre-requisite for ensuring the accuracy of intelligent cable sensing, meeting mechanical performance standards, and the compliant implementation of engineering. It is of great significance for promoting the intelligent upgrade of bridge engineering.

This calibration was fully coordinated and guided by the Metrology Station of the Ministry of Transport Highway Science Research Institute. It was jointly developed and tested by China Communications Second Navigation Engineering Bureau Co., Ltd., a domestic infrastructure leading enterprise, and Falusheng Hongsheng Group Co., Ltd., a leading enterprise in intelligent cables. The core test work such as loading tensioning, mechanical calibration, and synchronous verification of sensing data was completed through the force-chi testing engineering structure test system. To ensure the smooth progress of this high-standard scientific research calibration work, Jinan Li Chi Testing established a special technical service team. They strictly followed national industry standards and measurement test norms, strictly controlled the equipment operation status, loading accuracy, test environment conditions, and data collection and verification, comprehensively avoiding test errors, ensuring the stability and controllability of the tensioning process, the authenticity and accuracy of the test data, and the scientific and effective nature of the calibration results. The entire test plan and actual measurement results were unanimously recognized and highly affirmed by the commissioning unit and the joint research team.

In the future, Li Chi Testing will continue to deepen its focus on the engineering mechanics testing and intelligent infrastructure detection fields, adhere to technological innovation and product iteration upgrades, continuously optimize the performance of high-end testing equipment and the specialized test service system. At the same time, it will continuously deepen the deep cooperation with national research institutes, industry leading enterprises, and actively participate in scientific research test projects in the forefront of intelligent transportation, new bridge structures, and intelligent engineering materials, using precise testing to empower engineering innovation, using reliable quality to safeguard infrastructure safety, and helping China's transportation infrastructure industry achieve high-quality development towards intelligence, standardization, and high-endation.