CAJ | 학술논문

基于 STM32采用等精度测频方法设计了一种可用于光信号检测的装置。该装置由供电模块、光转频模块、频率测量模块和数据显示模块组成，其中，被测光信号在光转频模块中通过硅光电二极管 S1226-8BK 转成微弱电信号，经放大和滤波处理后输入 AD650转换成频率信号。频率测量模块使用 ARM Cortex-M3内核 STM32F103RBT6作为处理器，结合一个 D 触发器，对光转频模块输出的频率信号进行等精度测频，测得的数据发送到上位机显示。实验结果表明，本装置测得的频率信号均与光功率之间成很好的线性关系，与示波器测量结果亦相吻合，证明了本装置可对光信号进行准确检测。相对于常用的频率测量法，本装置具有测量误差小的优点。
기우 STM32채용등정도측빈방법설계료일충가용우광신호검측적장치。해장치유공전모괴、광전빈모괴、빈솔측량모괴화수거현시모괴조성，기중，피측광신호재광전빈모괴중통과규광전이겁관 S1226-8BK 전성미약전신호，경방대화려파처리후수입 AD650전환성빈솔신호。빈솔측량모괴사용 ARM Cortex-M3내핵 STM32F103RBT6작위처리기，결합일개 D 촉발기，대광전빈모괴수출적빈솔신호진행등정도측빈，측득적수거발송도상위궤현시。실험결과표명，본장치측득적빈솔신호균여광공솔지간성흔호적선성관계，여시파기측량결과역상문합，증명료본장치가대광신호진행준학검측。상대우상용적빈솔측량법，본장치구유측량오차소적우점。
An optical signal monitoring equipment is designed based on the STM32 using equal-precision frequency measuring method. The equipment is made of a power module, an optical-frequency converting module, a frequency measurement module and a data display module. The optical signal is firstly converted into weak electrical signal by the silicon photodiode S1226-8BK , and then the electrical signal is enlarged, filtered and converted into frequency by the AD650. The frequency measurement module is equipped with STM32F103RBT6 chip based on the ARM Cortex-M3 and a Dflip-flop. The frequency outputted from the optical-frequency converting module could be detected using equal-precision frequency measuring method. The data would be transmitted to the host computer and displayed. The results testify that the equipment could accurately detect optical signals. Compared with the general frequency measurement, the measuring error of this system would be smaller.