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Dual‑Fiber Timing Technique for Tip Clearance Measurement and Experimental Verification
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Jinwei LOU1, Hanyu GAO1, Hai LIU1, Xiangxiang SHEN2, Fuhai LIU3, Guo CHEN3
Journal of Vibration,Measurement and Diagnosis | 2025, 45(5) : 1013 - 1018
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Journal of Vibration,Measurement and Diagnosis | 2025, 45(5): 1013-1018
• PAPER •
Dual‑Fiber Timing Technique for Tip Clearance Measurement and Experimental Verification
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Jinwei LOU1, Hanyu GAO1, Hai LIU1, Xiangxiang SHEN2, Fuhai LIU3, Guo CHEN3
Affiliations
  • 1.Shenyang Engine Research Institute，Aero-Engine Corporation of China　Shenyang，110015，China
  • 2.College of Civil Aviation，Nanjing University of Aeronautics and Astronautics　Nanjing，210016，China
  • 3.College of General Aviation and Flight，Nanjing University of Aeronautics and Astronautics　Liyang，213300，China
Published: 2025-10-01 doi: 10.16450/j.cnki.issn.1004-6801.2025.05.021
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For tip clearance measurement，a multi-section tip clearance measurement and verification simulation rotor test bench is established，and multi-channel tip clearance online measurement software is developed. First，tip clearance is measured using a customized dual-fiber sensor based on laser triangulation. Second，a high-precision displacement platform is utilized to change the tip clearance value，and accurate tip clearance values are measured at different rotational speeds. Last，to address the trigger threshold voltage issue of the acquisition card for measuring tip clearance with dual-fiber sensors，a multi-channel integrated voltage comparator has been designed，which eliminates the time difference on the order of 10-5 s caused by simultaneous measurement of the two channels of the dual-fiber sensor. The results show that，based on the tip timing principle，the tip clearance can be calculated by measuring only the arrival time of the tip. The mean error of each set of clearances is within 5%，and the standard deviation of the tip clearance measurements in each group is less than 22 µm，demonstrating the accuracy and repeatability of the tip clearance measurement system.

rotating machinery  /  tip clearance  /  laser triangulation  /  tip timing
Jinwei LOU, Hanyu GAO, Hai LIU, Xiangxiang SHEN, Fuhai LIU, Guo CHEN. Dual‑Fiber Timing Technique for Tip Clearance Measurement and Experimental Verification[J]. Journal of Vibration,Measurement and Diagnosis, 2025 , 45 (5) : 1013 -1018 . DOI: 10.16450/j.cnki.issn.1004-6801.2025.05.021
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Year 2025 volume 45 Issue 5
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Article Info
doi: 10.16450/j.cnki.issn.1004-6801.2025.05.021
  • Receive Date：2023-02-04
  • Online Date：2026-03-27
  • Published：2025-10-01
Article Data
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History
  • Received：2023-02-04
  • Revised：2023-05-05
Funding
Affiliations
    1.Shenyang Engine Research Institute，Aero-Engine Corporation of China　Shenyang，110015，China
    2.College of Civil Aviation，Nanjing University of Aeronautics and Astronautics　Nanjing，210016，China
    3.College of General Aviation and Flight，Nanjing University of Aeronautics and Astronautics　Liyang，213300，China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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