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本系统采用调制解调原理搭建,由视频输入模块、无线发射模块、无线接收模块、视频输出模块和字符叠加模块组成。摄像头采集信号,通过AV射频转换器进行信号转换,利用单片机在信号传输通道内叠加字符,通过无线收发模块对信号进行发射和接收,解调后实现视频信号的接收和所叠加字符的显示,可实现对农业大棚等设施的视频监控,经济实用。
The system uses the principle of modulation and demodulation to build, by the video input module, wireless transmitter module, wireless receiver module, video output module and character overlay module. The camera collects the signal and converts the signal through the AV RF converter. The single-chip microcomputer superimposes characters in the signal transmission channel, and transmits and receives the signal through the wireless transceiver module. After demodulation, the video signal is received and the superimposed characters are displayed. Realize the video monitoring of agricultural greenhouses and other facilities, economical and practical.