There's a fitting analogy between the digital world of data and the physical environment we live in. Bad data is like trash: pollutants that infest the environment.
Data acquisition card is the AD interface card, which converts the analogy signal to the digital signal, and transfers the digital signal to the computer.
数据采集卡是一种把外界模拟信号转换成数字信号，并把数字信号输入到计算机系统的一种AD接口卡。
3
After extensively comparing the digital control with the analogy control, it was pointed that the application effects of digital control technology was much better than analogy control technology.