5 March 2018 Finite element simulation of the mechanism of laser ultrasound induced pain weapon
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Proceedings Volume 10710, Young Scientists Forum 2017; 1071035 (2018) https://doi.org/10.1117/12.2316765
Event: Young Scientists Forum 2017, 2017, Shanghai, China
The Laser-Ultrasonic technique uses laser energy to generate ultrasound waves in various solids. In normal conditions, this technique is used to inspect large structures without destruction, but in military use, we hope get this destruction. Nociceptors in Human skin can feel cold, heat, mechanical and other stimuli, when the stimulus exceeds a certain threshold will produce pain. Based on this principle, a laser induced pain weapon may be made. The generated ultrasound wave form is affected by features of laser pulse. The results obtained from the finite element model of laser generated ultrasound are presented in terms of temperature and displacement. At first step, the transient temperature field can be precisely calculated by using the finite element method. Then, laser generated surface acoustic wave forms are calculated by coupling the temperature distribution. Displacement is used to represent the mechanical action of skin caused by laser ultrasound. Results from numerical simulation are compared with other references; the accuracy of the method is proved accordingly. The results of simulation in the given conditions demonstrate that the stresses generated by pulse laser in human skin model were about −8 and +4 MPa. According to the results of simulation, the max and min stress are both emerged in the range of 0~600 um, that is exactly the location of myelinated Aδ and unmyelinated C nociceptor. The value of stress is can be adjusted by chose suitable parameters of laser. The study provides a possibility for developing a new non-lethal weapon to control riots or crowd.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bo Zhou, Bo Zhou, Ren Jun Zhan, Ren Jun Zhan, Ning Shan, Ning Shan, } "Finite element simulation of the mechanism of laser ultrasound induced pain weapon", Proc. SPIE 10710, Young Scientists Forum 2017, 1071035 (5 March 2018); doi: 10.1117/12.2316765; https://doi.org/10.1117/12.2316765

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