摘要
针对手动调节双稳态结构参数不易实现随机共振的问题,设计并实现了一个基于AVR单片机的自适应随机共振信号检测系统。系统由双稳态随机共振电路、电压转换电路和AVR模块组成,通过共振判定算法判定系统是否发生共振,利用线性搜索算法驱动调节数字电位器AD7376改变双稳态系统结构参数来产生随机共振,实现了噪声背景下单频微弱周期信号的有效检测。
In manual regulation of bistable structure parameters, it＇s difficult to realize stochastic resonance. To solve this problem, an adaptive stochastic resonance signal detection system was designed and implemented based on AVR monolithic micro- processor,which is composed of bistable stochastic resonance circuit,voltage conversion circuit and AVR module. The system jud- ges if resonance occurs or not through resonance decision program, and the linear search algorithm is used to actuate digital potenti- ometer AD7376 to change the bistable system＇ s structure parameters to generate stochastic resonance, thus realizing the single fre- quency weak signal＇ s effective detection.
出处
《仪表技术与传感器》
CSCD
北大核心
2013年第12期105-108,共4页
Instrument Technique and Sensor
关键词
AVR单片机
随机共振
AD7376
双稳态系统
有效检测
AVR monolithic microprocessor
stochastic resonance
AD7376
bistable system
effective detection
