Shock Wave Overpressure Test System Based on Distributed Optical Fiber Network and Denoising Algorithm

2018 ◽  
Vol 13 (7) ◽  
pp. 1063-1075
Author(s):  
Zong-Lei Mou ◽  
Ping Song ◽  
Ya-Yu Zhai ◽  
Xiao-Xiao Chen
Keyword(s):  
Shock Wave ◽  
Optical Fiber ◽  
Test System ◽  
Fiber Network ◽  
Distributed Optical Fiber ◽  
Optical Fiber Network

A Novel High-Precision Synchronous Sampling Mechanism for Distributed Test System Based on Optical Fiber Network and Low-Cost Field-Programmable Gate Array

2020 ◽  
Vol 15 (4) ◽  
pp. 504-515
Author(s):  
Zonglei Mou ◽  
Xueben Niu ◽  
Chen Wang ◽  
Xiao Lu
Keyword(s):  
Optical Fiber ◽  
High Precision ◽  
Field Programmable Gate Array ◽  
Low Cost ◽  
Test System ◽  
Fiber Network ◽  
Synchronous Sampling ◽  
Field Programmable ◽  
Distributed Test ◽  
Optical Fiber Network

In this paper, we propose a distributed test system based on optical fiber network with multiple devices. In order to resolve the data sampling synchronicity problems, a novel synchronous sampling mechanism is developed to achieve high-precision sampling synchronicity among data acquisition devices with relatively low-cost hardware. First, we present the design of the system based on optical fiber network and the mechanism implemented in Field-Programmable Gate Array (FPGA) devices. Then, the device clocks are calibrated to run on a same frequency using a clock-disciplining algorithm for hardware implementation. In addition, propagation delays, which are used for the synchronous errors compensation during data analysis, are precisely measured using a high-precision time interval measurement approach based on delay-chain loop comparison method. A series of experiments on a real test system demonstrate the effectiveness of the proposed models and methods, and the mechanism has been employed in a general-purpose reprogrammable device cyclone-II (Altera).

Optical fiber network-connected distributed mm-wave radar system

2017 ◽  
Author(s):  
Tetsuya Kawanishi ◽  
Atsushi Kanno ◽  
Naokatsu Yamamoto ◽  
Naruto Yonemoto ◽  
Nobuhiko Shibagaki ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Radar System ◽  
Fiber Network ◽  
Wave Radar ◽  
Optical Fiber Network
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