North University of China

Pinggang Jia

Jijun Xiong

Wenyi Liu

Qiulin Tan

Yongqiu Zheng

Chenyang Xue

Yingping Hong

Xinyu Zhao

Liyun Wu

Jiamin Chen

Yuan Han

Guowen An

Jia Liu

Chen Chen

Guocheng Fang

Ting Liang

Jinge Guan

Qianyu Ren

Some embodiments of the disclosure provide a demodulation system for obtaining phase change parameters by a fiber-optic Fabry Perot sensor. In an embodiment, the demodulation system includes a transmitting module, a fiber-optic Fabry Perot sensor, a light splitting module, a filter module, a receiving module, and a processing module. The transmitting module transmits a beam with a predetermined wavelength range. The fiber-optic Fabry Perot sensor receives the beam and forms a reflected light beam. The light splitting module is arranged between the transmitting module and the fiber-optic Fabry Perot sensor. The filter module obtains the first light beam, the second light beam, and the third light beam. The filter module has a broadband filter. The receiving module receives the first light beam, the second light beam, and the third light beam and converts them into the first signal, the second signal, and the third signal.

Demodulation system and demodulation method of fiber-optic sensor for obtaining phase change parameters

The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device. When heat, sound and vibration need to be detected, only spectra of light signals emitted by the heat detection device, the sound detection device and the vibration detection device need to be obtained, and heat information, sound information and vibration information to be detected are obtained through the corresponding relation between the spectra of the optical signals emitted by the heat detection device, the sound detection device and the vibration detection device and heat information, sound information and vibration information to be detected.

Heat-sound-vibration three-parameter integrated in-situ sensor and system of high-temperature-resistant and high-pressure-resistant structure

Some embodiments of the disclosure provide an optical fiber Fabry-Perot sensor (), and a manufacturing method thereof. According to an embodiment, the optical fiber Fabry-Perot sensor () includes a hollow tube body (), a first optical fiber (), and a second optical fiber (). The hollow tube body () has a first tube body (), a cavity portion (), and a second tube body () sequentially arranged in an axial direction. The first optical fiber () is provided within the first tube body () in the axial direction and has a first light guide end face () provided within the cavity portion (). The second optical fiber () is provided in the second tube body () in the axial direction and has a second light guide end face () provided within the cavity portion ().

Optical fiber Fabry-Perot sensor, and manufacturing method thereof

Growing community of inventors

Shanxi, China

Pinggang Jia