基于STM8的激光功率计的设计
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摘要
设计了一种基于STM8的激光功率计的硬件结构和固件程序,并对系统的误差进行了分析。该功率计采用STM8S208MBT作为微控制器,通过PIN硅光电二极管实现光信号到电信号的转换,并利用运算放大器对信号进行转换、放大和滤波;同时,采用16位模数转换芯片AD7606-4,以保证系统的测量精度。通过LCD显示屏,用户可实时获得测量结果。实际测试结果表明:该功率计成本低,测量精度高,满足工程中对激光测量的要求。
This paper designed the hardware structure and firmware program of a kind of laser power meter based on STM8, and ana-lyzed the system error. The laser power meter used STM8 S208 MBT as micro-controller, with the use of PIN silicon photodiode torealize photoelectric conversion. By the use of operational amplifiers, it completed the transform, amplification and filter of the sig-nal. At the same time, a 16-bit A/D conversion chip AD7606-4 was used to ensure accuracy of system. User can get measurementresult of system in time by LCD display. The actual test results showed: the laser power meter has the advantages of low cost, highprecision, which can meet demand of laser measurement in engine.
This paper designed the hardware structure and firmware program of a kind of laser power meter based on STM8, and ana-lyzed the system error. The laser power meter used STM8 S208 MBT as micro-controller, with the use of PIN silicon photodiode torealize photoelectric conversion. By the use of operational amplifiers, it completed the transform, amplification and filter of the sig-nal. At the same time, a 16-bit A/D conversion chip AD7606-4 was used to ensure accuracy of system. User can get measurementresult of system in time by LCD display. The actual test results showed: the laser power meter has the advantages of low cost, highprecision, which can meet demand of laser measurement in engine.
引文
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[2]Robert G..Hunsperger.集成光学理论与技术[M].叶玉堂,译.6版.北京:电子工业出版社,2016:222–225.
[3]杨军.基于PIN光电二极管的光功率计设计[D].哈尔滨:哈尔滨理工大学,2012.
[4]Jerald Graeme.光电二极管及其放大电路设计[M].赖康生等译.北京:科学出版社,2012:38–45.
[5]Arthur Williams.模拟滤波器与电路设计手册[M].路秋生,译.北京:电子工业出版社,2015:78–86.
[6]刘建朝.微弱激光功率计研究[D].天津:河北工业大学机械工程学院,2007.
[7]高显生,彭英生.STM8实践[M].北京:机械工业出版社,2016:1-16.
[8]吴细煌.基于CAN总线的车辆数据采集及显示系统研究[D].广州:华南理工大学,2011.
[9]王水鱼,王伟.基于AD7606的智能电网数据采集系统设计[J].微型机与应用,2016,35(22):8-10.