基于LCD的牙髓荧光信号采集系统设计与分析

Design and Analyze Gather System of Dental Pulp Fluorescence Signal Base on LCD

将激光诱导荧光技术应用于牙髓活力检测中,且利用荧光强度与牙髓活力状况的关系理论,分析与设计可行的检测仪。论文建立在检测的光学系统上,提出以AT89C51为控制执行器,采用H7712型高灵敏度光电倍增管接收反射的荧光信号;以高速12位A/D转换器为信号采集核心,并采用可编程式LCD液晶显示为终端输出,设计采集系统电路,基于LCD分析信号采集与显示系统的采集电路与功能程序设计。通过初步试验,根据仪器显示结果,能够明显区分死髓牙与健康牙齿。

The technology of laser induced fluorescence was applied to detect the dental pulp vitality; the theory that the inten- sity of fluorescence has nearly related with the dental pulp vitality was used to analyze and design the detection apparatus. Base on the detect optical system, the AT89C51 was put forward as the control core, the PMT of H7712 is used to receive the signal of fluorescence, the 12 bit A/D and LCD are combined to design gather system. The circuit of gather was designed and analyzed, the control and gather program was compiled. Through the primary experimentation, the results show that the nonvital teeth can be distinguished from the healthy teeth.