基于蓝牙通信的阅读视力检查仪设计

The Design of a Reading Acuity Test Instrument Based on Bluetooth Communication

阅读视力检查广泛应用于视功能检查、低视力康复等眼科领域,国内外目前使用的纸质阅读视力表存在光照度无法定量、文字难以根据检查需要逐行显示、数据无法自动收集分析等问题,同时由于显示阅读视力表最小视标所需的像素密度极高等难点,目前还没有可以进行自动检查的仪器;针对上述问题,采用定制液晶模块,配以STM8单片机、蓝牙4.2模块,设计了具有蓝牙通信、语音识别、App控制等功能的阅读视力检查仪;检查仪具有显示效果精确、自动分析检查结果、适用性强等特点;测试结果表明,仪器符合检查标准,在视功能检查和低视力康复等眼科领域具有良好的应用前景。

Reading acuity testing is widely implemented in ophthalmology field such as visual function inspection and low vision rehabilitation. However, when using the printed version of reading acuity chart in clinics, it’s unable to quantify the illuminance, display the sentences line by line or automatically collect and analyze testing data. Meanwhile due to the difficulty of displaying the minimum target in display with extremely high pixel density, there is no such an automatic instrument at home and abroad. Given all that problems, a reading acuity test instrument was designed with customized LCD module, Bluetooth 4.2 module, STM8105 as the main processor. This App controlled device has the capabilities to perform reading acuity test through Bluetooth communication and automatic speech recognition. And has the advantage of high inspection accuracy, automatic analysis of testing results, and strong applicability. The experimental tests show that this design meets the standard accuracy demands. And there is a well applied prospect in the ophthalmology field in both examination and rehabilitation.