激光辐照鸟眼三维动态温度场仿真与实验研究
Simulation and Experimental Research on Three-Dimensional Dynamic Temperature Field of Bird's Eye Irradiated by Laser
刘鸿 1刘霞 1单宁 1刘其峰1
作者信息
- 1. 西安工程大学机电工程学院,陕西西安 710048
- 折叠
摘要
激光驱鸟以其优异的性能在农业、电力和航空安全等领域具有广阔应用前景.为安全、高效驱逐鸟类,需研究激光与鸟眼内部组织作用机理.首先,运用Pennes生物传热方程和Beer-Lambert方程建立三维动态模型模拟激光在鸟眼组织内的吸收和传递;其次,运用稳态模拟分析鸟眼在不同条件下的温度变化,将稳态结果作为瞬态研究的初始值,提高仿真结果的准确性;最后,建立激光驱鸟实验平台,进行了实验研究.结果表明,鸟眼球前部温度受环境温度和泪液蒸发的影响较大,后部温度较为稳定;激光辐照鸟眼时最高温度发生在视网膜上,不同部位组织温度可相差13 ℃.当光斑直径为3.5 mm,激光功率为1.5～2.7 mW时,照射时间0.4 s,最高温度可控制在52～60 ℃.经仿真与实验验证,所得激光参数可在高效驱逐鸟类的同时不会对鸟眼造成损伤.
Abstract
Laser bird repelling has promising applications in agriculture,power,and aviation safety with its excellent performance.To safely and efficiently expel birds,the mechanism of laser interaction with the internal tissues of the bird's eye needs to be studied.First-ly,the Pennes biological heat transfer equation and the Beer-Lambert equation are used to establish a three-dimensional dynamic model to simulate the absorption and transmission of laser light in the bird's eye tissue.Secondly,the steady-state simulation is used to ana-lyze the temperature change of the bird's eye under different conditions,and the steady-state results are used as the initial value of the transient study to improve the accuracy of the simulation results.Finally,a laser bird-repelling experimental platform was established and experimental studies were conducted.The results showed that the temperature of the anterior part of the bird's eyeball was greatly affected by the ambient temperature and tear evaporation,while the temperature of the posterior part was relatively stable.During laser irradiation,the highest temperature was observed on the retina,with variations of up to 13 ℃ among different tissue regions.When u-sing a light spot diameter of 3.5 mm,a laser power ranging from 1.5 mW to 2.7 mW,and an irradiation duration of 0.4 s,the maxi-mum temperature could be maintained between 52 ℃ and 60 ℃.Simulation and experimental validation confirmed that the determined laser parameters could effectively disperse birds without causing any harm to their eyes.
关键词
激光驱鸟/鸟眼组织/温度分布/热传导/COMSOLKey words
laser repelling birds/bird's eye tissue/temperature distribution/heat conduction/COMSOL引用本文复制引用
出版年
2024
NETL
NSTL
万方数据