LED植物补光源光量子通量密度的数据采集系统

摘要

LED植物工厂等都市农业生产和研发的基础是对植物生长的光环境的测量,由于植物光合作用主要是吸收可见光中的红光和蓝光,因此现在有关LED植物工厂的企业以及研发机构多采用蓝光、红光、远红光等单色LED进行植物补光,然而现在用于对单色补光的数据采集系统多用于测量400~700 nm波段的光量子通量密度,无法同时测量红光和蓝光LED的光量子通量密度,给进一步研究光质比的实时测量及与其他系统的反馈控制带来了阻碍.因此本文提出分别测量LED光源中红光和蓝光的光量子通量密度以解决以上问题.本文阐述了LED光量子数数据采集系统的整体结构以及硬件设计以及软件设计,并用该系统对红蓝光光量子数进行实时监测,然后和实际值进行比对,结果表明该系统所测数据在可承受的误差范围之内.%Urban agriculture, such as LED plant factory, based its research and development on the measurement of luminous environment for plants growth. Plant mainly absorbs red and blue light to grow, therefore,LED plant factories and research institutions use monochrome LED lights for plant supplemental lighting. The PAR quantum sensors, which could measure the photon flux of radiation in the spectral interval 400~700 nm, can't measure photon flux of red and blue LED simultaneously. This blocks the further research on real time measurements and system feedback control. Therefore, this paper presents a data acquisition system for measuring the amount of red and blue light in the LED light sourcerespectively, to solve the above problems. This paper describes the LED light quantum data acquisition system, the overall structure and the hardware design of each part and the host computer design. And the system monitors the red and blue light quantum number in real time, and then compares the data with the actual value. The results show that the measured data in the system is within the error tolerance range.