摘要
为在非接触眼压计设计时对喷嘴结构尺寸提供数值分析依据，基于多物理场耦合分析软件COMSOL Multiphsics建立非接触眼压计喷嘴仿真模型，对该模型参数进行理论分析。利用所建不同半径、长度的喷嘴模型，通过仿真确定适合非接触眼压计喷嘴的最优长度、直径，分析额定距离下喷嘴将眼角膜喷为一定平面时眼睛距喷嘴不同距离处压强及速度分布。仿真结果表明，非接触眼压计喷嘴最优参数为喷嘴半径1 mm，长度20 mm，距离喷嘴额定距离10.5 mm。实验结果显示，在此参数条件下，非接触眼压计喷嘴可提供眼压测量的合适喷气压力范围，空气气流喷至眼角膜时可使角膜压平变形到要求的一定直径平面。
Abstract
When in designing the non-contact tonometer provides the basis of the numerical analysis in the design structure and size of the nozzle, A numerical model of Non-contact tonometer nozzle using multi-physics coupling analysis software COMSOL Multiphysics was established. And analysising the parameter design of non-contact tonometer nozzle, Which can optimize the size of the nozzle by changing the radii and length. The distribution of pressure and velocity at a rated distance was studied when the nozzle spray cornea at a certain plane. The simulation results show that the optimum of the non-contact tonometer nozzle is located at radius of 1 mm, and 20 mm in length, the rated distance from the nozzle is 10.5mm. The experimental results show that at this condition the nozzle of the Non-contact tonometer can provides an appropriate jet pressure range for the intraocular pressure measurement when the spraying air flow deform the cornea to a certain diameter plane.
关键词
非接触眼压计 /
喷嘴 /
压强 /
气流
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Key words
non-contact tonometer /
nozzle /
press /
airflow
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陈 骥;王园园.
基于COMSOL Multiphysics 非接触眼压计喷嘴的数值模拟[J]. 振动与冲击, 2015, 34(2): 61-65
CHEN Ji;WANG Yuan-yuan.
Numerical simulation of non-contact tonometer nozzle based on COMSOL Multiphysics[J]. Journal of Vibration and Shock, 2015, 34(2): 61-65
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