US 11,703,377 B2
Heat-sound-vibration three-parameter integrated in-situ sensor and system of high-temperature-resistant and high-pressure-resistant structure
Yongqiu Zheng, Taiyuan (CN); Chenyang Xue, Taiyuan (CN); Jinge Guan, Taiyuan (CN); Pinggang Jia, Taiyuan (CN); Xinyu Zhao, Taiyuan (CN); Chen Chen, Taiyuan (CN); Jiamin Chen, Taiyuan (CN); Liyun Wu, Taiyuan (CN); and Yuan Han, Taiyuan (CN)
Assigned to NORTH UNIVERSITY OF CHINA, Taiyuan (CN)
Filed by North University of China, Taiyuan (CN)
Filed on Feb. 9, 2022, as Appl. No. 17/667,760.
Claims priority of application No. 202110173827.2 (CN), filed on Feb. 9, 2021.
Prior Publication US 2022/0299359 A1, Sep. 22, 2022
Int. Cl. G01H 17/00 (2006.01)
CPC G01H 17/00 (2013.01) 20 Claims
OG exemplary drawing
 
1. A thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure, wherein the sensor comprises a heat detection device, a sound detection device and a vibration detection device; the sound detection device and the vibration detection device are distributed on two sides of the heat detection device; the sound detection device comprises a main body structure, a first volume grating, a second volume grating and a first optical fiber, a hole is formed in the interior of the main body structure, the hole is a cuboid, the first volume grating and the second volume grating are arranged on two opposite surfaces of the cuboid hole respectively, the first optical fiber is arranged outside the main body structure and close to the first volume grating; the heat detection device is a second optical fiber, a Bragg grating is arranged inside the second optical fiber, and the Bragg grating is perpendicular to the optical axis of the second optical fiber; and the vibration detection device comprises a third volume grating, a fourth volume grating, a cavity structure, a third optical fiber and a vibrating membrane, the cavity structure is a hollow cavity structure, the cavity structure is made of a semi-reflecting and semi-transparent material, the third volume grating and the fourth volume grating are arranged on two opposite surfaces inside the hollow cavity of the cavity structure respectively, the vibrating membrane is arranged inside the cavity structure and perpendicular to a connecting line of the third volume grating and the fourth volume grating, a light hole is formed in the center of the vibrating membrane, and the third optical fiber is arranged outside the cavity structure and close to the third volume grating.