摘要
采用编码技术进行红外线遥控开关控制,只能用于一般环境。在强干扰环境中发射的信号经过干扰后,接收电路难以准确辨认。采用红外光所载频率为38kHz的信号作为载波信号,890Hz左右的方波作为调制信号,经调制后作为发射信号。由接收头NJL61H380A对经过强干扰的38kHz的已调波进行接收和解调。其输出经低通滤波器滤波后,由模糊识别电路对其模糊识别。
The infrared remote control in code modulation method can only be used in general environment.If the jamming signal is strong,the receiving circuit can not identify the interfered signal accurately.Using infrared carries 38 kHz frequency signal as carrier,the 890 Hz square wave as modulator signal,after modulating them the signal is sent.The infrared remote control receiver NJL61H380A receives and demodulates the modulated infrared signal then inputs it to the low-frequency filter.After filtered,it is fuzzily identified.The design circuit above is sample and the anti-interference ability is strong.
出处
《仪表技术与传感器》
CSCD
北大核心
2004年第5期32-33,共2页
Instrument Technique and Sensor
