采用空气静压技术的非接触眼压测量系统

Non-contact IOP measuring system based on aerostatic technology

针对目前国外对非接触眼压测量技术的垄断,以及国内现存技术的不足,研制了一种新型的基于力平衡原理和空气静压技术的非接触式眼压测量系统。该系统以ARM9S3C2440A为核心处理器,主要包括气浮测量模块、控制模块、人机交互及通讯接口等模块,其中气浮式测量模块能够对CCD摄像头信号、压力传感器信号、角膜反射的光电信号进行采集和测量,控制模块实现中心气腔供气压力的控制。利用研制的系统对人体眼压进行测量,结果表明眼压测量的重复性误差≤6.01%,与进口仪器相比眼压测量的绝对误差≤1.3mmHg,表明该系统能够快速、方便地检测出人体的眼压值。

For the foreign monopoly of current non-contact tonometry technology and the disadvantage of domestic existing technology,we develop a new type of non-contact tonometry system base on equilibrium principle and aerostatic technology.The system adopts ARM9 S3C2440A as the core,mainly including flotation measurement module,control module,human-computer interaction and communication interface module.The flotation measurement module could finish the signal acquisition and measurement on CCD camera,pressure sensor,and optical signals of corneal reflection that the control module mainly controlled the supply gas pressure of centered gas chamber.When the developed system is used to measure human intraocular pressure,the measured values show that there is only less than 6.01% repeatability error.Compared with the imported non-contact tonometry,the absolute error between two equipments＇ measured IOP values is also no more than 1.3m mHg,which shows that the system could detect the intraocular pressure of people quickly and easily.