摘要
设计了一种基于STM32F103系列处理器为控制核心的可见分光光度计,实现了在可见光谱区域对样品物质进行定量分析,可以实时显示透射比、吸光度、溶液浓度、浓度因子。系统采用具有超低暗电流的硅光电池进行光电信号转换,电流信号经过由正负电源供电的精密运放芯片进行放大处理,然后由MCU进行A/D采样和数据处理,通过液晶屏显示透射比等参数。测量结果显示,该系统的测量结果非常精确,并且具有很好的重复性和响应速度。
A visible spectrophotometer system based on STM32F103 series processor as the control core was designed,which can quantitatively analyze the sample material in the visible spectrum region,and can real-time display the transmittance,absorbance,solution concentration and concentration factor.The system used ultra-low dark current silicon photocell for photoelectric signal conversion,through the positive and negative power supply of precision op-amp chip amplification,and then by the MCU for AD sampling and data processing.Eventually,the LCD displayed transmission ratio and other parameters.The measurement results show that the system has higher accuracy and repeatability and response speed.
出处
《仪表技术与传感器》
CSCD
北大核心
2017年第9期55-58,共4页
Instrument Technique and Sensor
基金
国家公益性行业科研专项项目(GYHY201306079)
国家自然科学基金项目(61605082)
江苏高校品牌专业建设工程资助项目
