Miniature Underwater Shock Wave Pressure Sensor Based on All-Silica Optical Fiber Fizeau Cavity

2019 ◽  
Vol 39 (2) ◽  
pp. 0212010
Author(s):  
王俊杰 Wang Junjie ◽  
刘劲 Liu Jing ◽  
傅正义 Fu Zhengyi ◽  
褚程雷 Chu Chenglei ◽  
杨明红 Yang Minghong
Keyword(s):  
Shock Wave ◽  
Optical Fiber ◽  
Pressure Sensor ◽  
Underwater Shock Wave ◽  
Wave Pressure ◽  
Underwater Shock ◽  
Silica Optical Fiber ◽  
Shock Wave Pressure

scholarly journals Study of Ho:YAG Laser Generated Underwater Shock Waves and Cavity Bubble for Revascularization Therapy

2000 ◽  
Author(s):  
S. H. R. Hosseini ◽  
T. Hirano ◽  
O. Onodera ◽  
K. Takayama
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Early Stage ◽  
Underwater Shock Wave ◽  
Ho:Yag Laser ◽  
Direct Laser ◽  
Order Of Magnitude ◽  
Underwater Shock

Abstract For applying shock waves to precise medical procedures like neurosurgery, a reliable generation of micro shock waves is required. Such sensitive applications make limits on usage of conventional underwater shock wave sources like Extracoporeal Shock Waves ESW [1] or micro explosives [2]. In the present study a Q-switched Ho:YAG laser and an optical fiber are used. Advantages of this method over previous shock wave sources are two order of magnitude reduction in focusing area if compared with ESW and elimination of product gases of micro explosives. Nakahara and Nagayama [3] studied underwater shock waves emanated from surface of an optical fiber by pulse Nd:YAG laser input using shadowgraph technique. Their qualitative study limited to visualization of shock waves at its early stage. The present research aims to clarify quantitatively process of the shock wave generation by direct laser beam irradiation through optical fibers, growth and behavior of generated cavities, and structure of heat induced flow in front of the optical fiber.

Study on Dynamic Characteristics of Shock Wave Pressure Sensor Assembly Based on Differential Method

2016 ◽  
Vol 14 (5) ◽  
pp. 536-541 ◽  
Author(s):  
Yang Fan ◽  
Kong Deren ◽  
Kong Lin ◽  
Wang Fang ◽  
Zhang Jinqiu
Keyword(s):  
Shock Wave ◽  
Dynamic Characteristics ◽  
Pressure Sensor ◽  
Differential Method ◽  
Wave Pressure ◽  
Shock Wave Pressure ◽  
Sensor Assembly

Numerical Simulation on the Deepwater Effect of Underwater Explosion Shock Wave

2015 ◽  
Vol 723 ◽  
pp. 290-295
Author(s):  
Zhen Jun Yang
Keyword(s):  
Shock Wave ◽  
Near Field ◽  
Underwater Explosion ◽  
Pressure Curve ◽  
Underwater Shock Wave ◽  
Target Pressure ◽  
Underwater Shock ◽  
Shock Wave Pressure ◽  
Value Changes

By the known shock wave pressure curve, the shock wave of the underwater explosion was simulated loading on a specific target, the stress of the surface of the target, pressure value changes at a point as well as the characteristics response of the target. Through the simulation on the role of near-field characteristics of underwater shock wave acting on the target plate, this paper presents a new way to study the underwater explosion. We can get the pathway graph and its corresponding target corresponding renderings through this method. And all these results can guide the synthesis of new explosive formulations and new substances in the underwater explosives research.

A Signal Processing Circuit for Shock Wave Pressure Sensor

2011 ◽  
Vol 65 ◽  
pp. 44-47
Author(s):  
Bin Feng ◽  
Xiu Hua Shi ◽  
Zhi Qiang Kang
Keyword(s):  
Shock Wave ◽  
Signal Processing ◽  
Pressure Sensor ◽  
Charge Amplifier ◽  
Wave Pressure ◽  
Fire Experiment ◽  
Shock Wave Pressure ◽  
Signal Processing Circuit ◽  
Electrical Components ◽  
Processing Circuit

A cheap signal processing circuit was designed to replace expensive special charge amplifier which was used for shock wave pressure sensor. We used conventional electrical components to design the charge amplifying circuit and the filter circuit. A fine image of shock pressure wave was got using this signal processing circuit in a real fire experiment.

Explosive Welding Using Underwater Shock Wave Generated by the Detonation of the Detonating Code

2011 ◽  
Vol 673 ◽  
pp. 265-270 ◽  
Author(s):  
Akihisa Mori ◽  
Li Qun Ruan ◽  
Kazumasa Shiramoto ◽  
Masahiro Fujita
Keyword(s):  
Shock Wave ◽  
Sound Velocity ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
New Method ◽  
Underwater Shock Wave ◽  
Metal Plates ◽  
Experimental Parameters ◽  
Underwater Shock ◽  
Point Velocity

Detonating code is a flexible code with an explosive core. It is used to transmit the ignition of explosives with high detonation velocity in the range of 5.5 to 7 km/s. However, it is difficult to use detonating code for the explosive welding of common metals since the horizontal point velocity usually exceeds the sound velocity. Hence, in the present work, a new method using underwater shock wave generated by the detonation of detonating code was tried. The details of the experimental parameters and the results are presented. From the results it is observed that the above technique is suitable to weld thin metal plates with relatively less explosives.

Von Neumann reflection of underwater shock wave

1999 ◽  
Vol 85 (1-3) ◽  
pp. 48-51 ◽  
Author(s):  
Y Nadamitsu ◽  
Z.Y Liu ◽  
M Fujita ◽  
S Itoh
Keyword(s):  
Shock Wave ◽  
Underwater Shock Wave ◽  
Von Neumann ◽  
Underwater Shock
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