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本设计是一个能精确分辨出代表危险信号的狗叫声的狗吠二次报警器。它是应用数字信号处理技术对狗吠声进行处理,提取常“与”非正常“情况下狗吠特征的不同点,形成特征参数数据库并存储于单片机中。由传感器实时检测声音,对采集的语音信号进行快速傅叶变换(以下简称FFT)并与模板进行精确比对,判断是否发出报警信息。设计中以凌阳公司研发的16位单片SPCE061A作为系统核心,将统用DSP实现的FFT变换改为用单片机实现,成本大大降低。
This design is a barking secondary annunciator that accurately distinguishes barking sounds that represent dangerous signals. It is the application of digital signal processing technology to deal with the dog bark, extract the regular ”and “ abnormal ”bark characteristics of different points, the formation of characteristic parameters and stored in the microcontroller database.Sensor real-time detection of sound, Fast Fourier transform (hereinafter referred to as FFT) of the collected voice signal and accurate comparison with the template to determine whether to send alarm information.The design of Sunplus 16-bit single-chip SPCE061A R & D system as the core, the general DSP The realization of the FFT transform to achieve with a single chip, the cost is greatly reduced.