Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Zhenfeng Gong"'
Autor:
Jiapeng Wang, Hongpeng Wu, Xiaoli Liu, Gang Wang, Yong Wang, Chaofan Feng, Ruyue Cui, Zhenfeng Gong, Lei Dong
Publikováno v:
Photoacoustics, Vol 38, Iss , Pp 100605- (2024)
Dual-comb photoacoustic spectroscopy (DC-PAS) advances spectral measurements by offering high-sensitivity and compact size in a wavelength-independent manner. Here, we present a novel cantilever-enhanced DC-PAS scheme, employing a high-sensitivity fi
Externí odkaz:
https://doaj.org/article/6cd51dbe0d7846c0a9a2cf211a00f8f3
Autor:
Guojie Wu, Yongjia Zhang, Zhenfeng Gong, Yeming Fan, Jiawei Xing, Xue Wu, Junsheng Ma, Wei Peng, Qingxu Yu, Liang Mei
Publikováno v:
Photoacoustics, Vol 37, Iss , Pp 100595- (2024)
This paper reports a mini-resonant photoacoustic sensor for high-sensitivity trace gas sensing. The sensor primarily contains a sphere-cylinder coupled acoustic resonator, a cylindrical buffer chamber, and a fiber-optic acoustic sensor. The acoustic
Externí odkaz:
https://doaj.org/article/5f4880f002694afcb74ad337e1f94e28
Autor:
Min Guo, Xinyu Zhao, Ke Chen, Dongyu Cui, Guangyin Zhang, Chenxi Li, Zhenfeng Gong, Qingxu Yu
Publikováno v:
Photoacoustics, Vol 29, Iss , Pp 100449- (2023)
To realize the real-time highly sensitive detection of SF6 decomposition product H2S, a multi-mechanism collaboration enhancement photoacoustic spectroscopy analyzer (MCEPA) based on acoustic resonance enhancement, cantilever enhancement and excitati
Externí odkaz:
https://doaj.org/article/68b22035e59a4bf7b2cac666013bd900
Autor:
Guojie Wu, Zhenfeng Gong, Junsheng Ma, Haie Li, Min Guo, Ke Chen, Wei Peng, Qingxu Yu, Liang Mei
Publikováno v:
Photoacoustics, Vol 27, Iss , Pp 100386- (2022)
We report a miniature dual-resonance photoacoustic (PA) sensor, mainly consisting of a small resonant T-type PA cell and an integrated sensor probe based on a silicon cantilever beam. The resonance frequency of the miniature T-type PA cell is matched
Externí odkaz:
https://doaj.org/article/f4534f7f9cad42bf83e696d407bb1233
Autor:
Guojie Wu, Haie Li, Hongxin Ye, Zhenfeng Gong, Junsheng Ma, Min Guo, Ke Chen, Wei Peng, Qingxu Yu, Liang Mei
Publikováno v:
Sensors, Vol 22, Iss 18, p 6948 (2022)
An ultra-high-sensitivity, miniaturized Fabry-Perot interferometric (FPI) fiber-optic microphone (FOM) has been developed, utilizing a silicon cantilever as an acoustic transducer. The volumes of the cavity and the FOM are determined to be 60 microli
Externí odkaz:
https://doaj.org/article/91b72e9acf444d98932f64e2d2745fae
Publikováno v:
Photonic Sensors, Vol 9, Iss 4, Pp 293-301 (2019)
Abstract A trace ammonia (NH3) detection system based on the near-infrared fiber-optic cantilever-enhanced photoacoustic spectroscopy (CEPAS) is proposed. A fiber-optic extrinsic Fabry-Perot interferometer (EFPI) based cantilever microphone has been
Externí odkaz:
https://doaj.org/article/e720147215794e7d9a0d3d89f0e8998f
Simulation Parameter Calibration and Test of Typical Pear Varieties Based on Discrete Element Method
Publikováno v:
Agronomy, Vol 12, Iss 7, p 1720 (2022)
To improve the accuracy of discrete element simulation parameters for the mechanized picking and collection of pears, the study calibrated the simulation parameters of pears by the method of combining a physical experiment and simulation. Based on th
Externí odkaz:
https://doaj.org/article/f00e0087c07e4956a0b3a8882ab3b5e1
Ppb-level detection of methane based on an optimized T-type photoacoustic cell and a NIR diode laser
Publikováno v:
Photoacoustics, Vol 21, Iss , Pp 100216- (2021)
This paper presents an optimized T-type resonant photoacoustic (PA) cell for methane (CH4) gas detection. The noise transmission coefficients and PA field distributions of the T-type resonant PA cell have been evaluated using the finite element metho
Externí odkaz:
https://doaj.org/article/a21ac9515e6f454a892427a182617c2f
Autor:
Xinbang Zhou, Zhenfeng Gong
Publikováno v:
Photonic Sensors, Vol 8, Iss 1, Pp 13-21 (2017)
Abstract In this paper, we theoretically investigate the influences of pressure and temperature on the birefringence property of side-hole fibers with different shapes of holes using the finite element analysis method. A physical mechanism of the bir
Externí odkaz:
https://doaj.org/article/fe518963d786427780680be66b476070
Autor:
Yexiang Jiao, Hongji Fan, Zhenfeng Gong, Kai Yang, Feiyang Shen, Ke Chen, Liang Mei, Wei Peng, Qingxu Yu
Publikováno v:
Applied Sciences, Vol 11, Iss 11, p 4997 (2021)
This paper presents an integrated spherical photoacoustic cell (SPAC) for trace methane (CH4) gas detection. Theoretical analysis and analogue simulations are carried out to analyze the acoustic field distribution of the SPAC at resonant and non-reso
Externí odkaz:
https://doaj.org/article/78d79057f75f4aae9518c2c4cc40da9e