设计并开发能检测模拟信号，并能产生报警信号的系统。其具体要求是： （1）能对输入的0—5V的模拟电压信号进行检测。 （2）能判断所检测的信号是否越界。 -Designed and developed the ability to detect analog signals, and can generate alarm signal systems. The specific requirements are: (1) can input 0-5V analog voltage si