Design And Implementation Of LED Multi-wavelength Light Quantum Acquisition System In Plant Factory

With the improvement of people's requirements for food quality and the reduction of the world's arable land,pollution of the natural environment is becoming more and more serious,so plant factory technology has been rapidly developed.the measurement of plant growth's luminous environment is the basis of urban agriculture,such as LED plant factory.The PAR quantum sensors,which measure the photon flux of radiation in the spectral interval 400nm-700nm,can't measure the several intervals which are used in plant lighting simultaneously,but the LED plant factory needs these data and their ratios by far,a type of multi-channel quantum sensor is designed to solve this problem.Accompanied by the rapid development of science and technology,as well as the increasing demands for data collection in various fields,the traditional digital acquisition card is gradually replaced by a combination of a master chip and a universal serial port.Because USB(Universal Serial Bus)can well make up for the shortcomings of the traditional data acquisition card interface,and FPGA(Field Editable Gate Array)has a flexible structure,short development time,easy to upgrade features.Therefore,this design uses FPGA(Field Editable Gate Array)as the master chip usb(Universal Serial Bus)as a serial data transmission.In this paper,the system hardware circuit design,software design and data processing in three aspects in-depth discussion.In the hardware:Mainly to complete the required part of the circuit design and the completion of the system schematic and PCB drawing.In the software:Mainly introduced FPGA program,usb fixed telephone program design ideas and design methods.Data post-processing:find the relationship between the collected data and the target data,and then through the host computer processing,the target data is displayed.