Phase-sensitive multichannel detection system for chemical and biosensor arrays and fluorescence lifetime-based imaging

2000 ◽  
Vol 71 (2) ◽  
pp. 522-529 ◽  
Author(s):  
Emmanuil Rabinovich ◽  
Michael J. O’Brien ◽  
Steven R. J. Brueck ◽  
Gabriel P. Lopez
Keyword(s):  
Fluorescence Lifetime ◽  
Detection System ◽  
Biosensor Arrays ◽  
Multichannel Detection ◽  
Phase Sensitive

Compact phase-sensitive multichannel detection system with array measurements of biosensor chips

2000 ◽  
Author(s):  
Emmanuil M. Rabinovich ◽  
Michael J. O'Brien II ◽  
Steven R. J. Brueck ◽  
S. Yang ◽  
Victor H. Perez-Luna ◽  
...  
Keyword(s):  
Detection System ◽  
Array Measurements ◽  
Multichannel Detection ◽  
Phase Sensitive

Fluorescence-lifetime-based phase-sensitive sensor array with LED or diode laser excitation for chemical- and biosensing

1999 ◽  
Author(s):  
Emmanuil M. Rabinovich ◽  
Michael J. O'Brien II ◽  
A. A. Ukhanov ◽  
Ravinder K. Jain ◽  
Victor H. Perez-Luna ◽  
...  
Keyword(s):  
Diode Laser ◽  
Fluorescence Lifetime ◽  
Sensor Array ◽  
Laser Excitation ◽  
Sensitive Sensor ◽  
Phase Sensitive

Weak Signal Detection System Based on Lock-in Amplifier Technology

2013 ◽  
Vol 389 ◽  
pp. 489-493
Author(s):  
Yong Lv ◽  
Chun Hui Niu ◽  
Yue Qiang Li ◽  
Qing Shan Chen ◽  
Xiao Ying Li ◽  
...  
Keyword(s):  
Signal Detection ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Phase Sensitive ◽  
Lock In

In order to detect the weak signal deeply buried in the noise, a weak signal detection system based on lock-in amplifier is proposed. The system includes the preamplifier circuit, active low pass filter circuit, AC amplifying circuit and phase sensitive demodulation circuit. Test results show that it can greatly increase the signal-to-noise ratio (SNR) up to 12.7db.

Multi-Parameter Vibration Detection System Based on Phase Sensitive Optical Time Domain Reflectometer

2012 ◽  
Vol 39 (8) ◽  
pp. 0805004 ◽  
Author(s):  
梁可桢 Liang Kezhen ◽  
潘政清 Pan Zhengqing ◽  
周俊 Zhou Jun ◽  
叶青 Ye Qing ◽  
蔡海文 Cai Haiwen ◽  
...  
Keyword(s):  
Time Domain ◽  
Detection System ◽  
Optical Time Domain Reflectometer ◽  
Vibration Detection ◽  
Phase Sensitive ◽  
Optical Time ◽  
Time Domain Reflectometer

scholarly journals 3D Printing Technique-Improved Phase-Sensitive OTDR for Breakdown Discharge Detection of Gas-Insulated Switchgear

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1045
Author(s):  
Zhen Chen ◽  
Liang Zhang ◽  
Huanhuan Liu ◽  
Peng Peng ◽  
Zhichao Liu ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
3D Printing ◽  
Detection System ◽  
Poisson Ratio ◽  
Time Domain Reflectometry ◽  
Discharge Process ◽  
Gas Insulated Switchgear ◽  
3D Printed ◽  
Phase Sensitive ◽  
Discharge Detection

In this paper, we propose and demonstrate a gas-insulated switchgear (GIS) breakdown discharge detection system based on improved phase-sensitive optical time domain reflectometry (φ-OTDR) assisted by 3D-printed sensing elements. The sensing element is manufactured by a material with a high Poisson ratio for enhancement of the sensitivity of φ-OTDR to the acoustic emission detection during the breakdown discharge process. In our experiment, seven 3D-printed sensing elements incorporating with optical fibers are attached tightly onto the shell of the GIS, which are monitored by φ-OTDR to localize and detect the acoustic emission signal resulted from the breakdown discharge. Ultimately, thanks to the phase demodulation, acoustic signals induced by the breakdown discharge process can be captured and recovered. Furthermore, the time delay analysis of detected signals acquired by different sensing elements on the GIS breakdown discharge unit is able to distinguish the location of the insulation failure part in the GIS unit. It suggests that the φ-OTDR incorporated with 3D printing technology shows the advantage of robustness in GIS breakdown discharge monitoring and detection.

A multichannel detection system for application in ultra-fast spectroscopy

1997 ◽  
Vol 8 (4) ◽  
pp. 449-452 ◽  
Author(s):  
Matthias Seel ◽  
Eberhard Wildermuth ◽  
Wolfgang Zinth
Keyword(s):  
Detection System ◽  
Multichannel Detection
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