大麦田间视频采集与无线传输系统设计

Design of image acquisition and wireless transmission system in barley field

针对我国农田作物生长状况需大量人力监测的问题,以大麦农田为试验对象,设计一种大麦田间视频采集的无线传输系统。主要对视频图像的采集与传输进行了理论分析和设计,通过田间试验对结果进行验证。相关分析结果表明,本系统采用的有损压缩算法(Discrete cosine transform,DCT),在1 000m以内传输时间<70ms,数据包发送成功率>98%,与农田监控直送系统采用的无损压缩算法(Differential pulse-code modulation,DPCM)相比,在相同传输距离下,数据量小,传输时间短,传输成功率高,具有较好的实时性和稳定性;而且成本低、体积小、易于安装,可实现对大麦生长视频信息的自动采集及无线传输。

Refer to the problem that a large amount of labor was consumed in monitoring field crop growth,a system was designed for image acquisition and wireless transmission for barley field.The validation of the system was verified through field tests.The results of correlation analysis showed that within 1 000 meter of transmission distance,the data packet transmitting time was less than 70 ms,the success rate of packet transmission was above 98% by DCT date compression algorithm.Compared with DPCM date compression algorithm under the same transmission distance,DCT date compression algorithm had the advantages of small amount of data,short transmission time and high transmission rate.DCT had a good real-time performance and stability,in addition,with the advantages of small size,low cost and easy installation.