摘要
为了能够准确的测量信号的参数,设计了一种宽带交直流信号检测系统,该系统的控制芯片采用的是STC12C5A32S2单片机.首先,信号采集电路采集到的信号经交直流测量电路进行处理;然后,通过分压和自动增益放大电路等处理后,在频率和相位检测电路中测量信号的频率和相位;最后,在液晶显示器上显示待测信号的幅度、相位和频率等信息.在实验中,测量了频率为0-20KHz的不同幅度信号,实验结果表明,在低频情况下测量误差可以忽略,在高频信号测量时的测量误差小于1%.
In order to accurately measure the parameters of the signal, a wideband AC and DC signal detection system is proposed, the STC12C5A32S2 microcontroller is used as control chip of the system. First, the signal is collected by the AC and DC and signal measurement circuit is processed and analyzed. Then, the signal will be processed by dividing and automatic gain amplification circuit, the frequency and phase of the signal is measured in the frequency and phase detection circuit. Finally, the amplitude, phase and frequency information of the signal is shown on the LCD. In the experiment, the signal with 0-20 KHz frequency at different amplitudes is measured, the experimental results shows that the measurement error can be ignored in the low-frequency signal measurement, and in the high-frequency signal measurement error is less than 1%.
出处
《计算机系统应用》
2016年第10期292-296,共5页
Computer Systems & Applications
基金
江苏省产学研前瞻性项目(BY2015057-39)
中国博士后科学基金(2015M571637)
江苏省高校自然科学研究基金(14KJB510034)
盐城工学院人才引进项目(KJC2013014)
关键词
信号检测
数字控制
采样
频率
相位
signal detection
digital control
sampling
frequency
phase
