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单色仪能量检测系统的设计
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作者 魏立峰 卜德权 +2 位作者 王庆辉 李月 赵幼南 《沈阳化工大学学报》 CAS 2016年第2期166-170,共5页
针对原子吸收分光光度计单色仪模块的光能检测,设计一套能量采集系统.由光电倍增管将元素灯发出的光能信号转换成脉动弱电压信号;设计二级放大电路及滤波电路,将弱脉动电压信号放大为直流电压信号,提高信号传输中的抗干扰性;采用高精度... 针对原子吸收分光光度计单色仪模块的光能检测,设计一套能量采集系统.由光电倍增管将元素灯发出的光能信号转换成脉动弱电压信号;设计二级放大电路及滤波电路,将弱脉动电压信号放大为直流电压信号,提高信号传输中的抗干扰性;采用高精度的AD转换器进行模数转换,并进行相应的软件滤波处理,得到高精度的能量信号;最后由上位机通过CAN总线与微控制器进行通信获取能量并进行吸光度处理.实际应用结果表明:该检测模块具有精度高、信噪比低和实时性好等优点,提高了系统的检测性能. 展开更多
关键词 单色仪 STM32F407 光能检测 电压信号放大 ADS1158
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Development status and prospect of cold chain logistics of fruits,vegetables,and agricultural products based on intelligent technology
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作者 ZHANG Ruizhi LIU Qianyuan +3 位作者 HUANG Yuying LIU Bing CHANG Zhiguang WANG Jiaoling 《智能化农业装备学报(中英文)》 2024年第3期63-74,共12页
The cold chain in the production area of fruits and vegetables is the primary link to reduce product loss and improve product quality,but it is also a weak link.With the application of big data technology in cold chai... The cold chain in the production area of fruits and vegetables is the primary link to reduce product loss and improve product quality,but it is also a weak link.With the application of big data technology in cold chain logistics,intelligent devices,and technologies have become important carriers for improving the efficiency of cold chain logistics in fruit and vegetable production areas,extending the shelf life of fruits and vegetables,and reducing fruit and vegetable losses.They have many advantages in fruit and vegetable pre-cooling,sorting and packaging,testing,warehousing,transportation,and other aspects.This article summarizes the rapidly developing and widely used intelligent technologies at home and abroad in recent years,including automated guided vehicle intelligent handling based on electromagnetic or optical technology,intelligent sorting based on sensors,electronic optics,and other technologies,intelligent detection based on computer vision technology,intelligent transportation based on perspective imaging technology,etc.It analyses and studies the innovative research and achievements of various scholars in applying intelligent technology in fruit and vegetable cold chain storage,sorting,detection,transportation,and other links,and improves the efficiency of fruit and vegetable cold chain logistics.However,applying intelligent technology in fruit and vegetable cold chain logistics also faces many problems.The challenges of high cost,difficulty in technological integration,and talent shortages have limited the development of intelligent technology in the field of fruit and vegetable cold chains.To solve the current problems,it is proposed that costs be controlled through independent research and development,technological innovation,and other means to lower the entry threshold for small enterprises.Strengthen integrating intelligent technology and cold chain logistics systems to improve data security and system compatibility.At the same time,the government should introduce relevant policies,provide necessary financial support,and establish talent training mechanisms.Accelerate the development and improvement of intelligent technology standards in the field of cold chain logistics.Through technological innovation,cost control,talent cultivation,and policy guidance,we aim to promote the upgrading of the agricultural industry and provide ideas for improving the quality and efficiency of fruit and vegetable cold chain logistics. 展开更多
关键词 fruits and vegetables cold chain logistics automated guided vehicle intelligent handling computer vision spectral detection
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