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非接触式明渠污水流量计的研制
消耗积分:5 |
格式:rar |
大小:213 |
2009-08-13
刘高
分享资料个
本文根据系统的技术要求，主要提出了系统硬件结构设计方案并论述设计原理。详细的论述了信号采集电路、LCD显示电路，4～20mA 标准电流输出电路、打印机电路、键盘电路和RS-232 接口电路的设计思想。采用了一些抗干扰措施，提高了系统的工作稳定性和测量精度。
关键字：系统硬件结构；模块功能；抗干扰措施。
Abstracts: The design plan of system’s hardware structure is mainly put forward according to technical requirements of the system and its design principle is discussed. The idea of signal sample circuit , LCD display circuit, standard current output circuit from 4mA to 20mA, printer circuit, keyboard circuit and RS-232 interface circuit is stated in detail. Running stability and measurement precision of the system are raised by adopting some of anti-interference methods.
Keywords: System’ hardware structure; Module function; Anti-interference methods.
关键字：系统硬件结构；模块功能；抗干扰措施。
Abstracts: The design plan of system’s hardware structure is mainly put forward according to technical requirements of the system and its design principle is discussed. The idea of signal sample circuit , LCD display circuit, standard current output circuit from 4mA to 20mA, printer circuit, keyboard circuit and RS-232 interface circuit is stated in detail. Running stability and measurement precision of the system are raised by adopting some of anti-interference methods.
Keywords: System’ hardware structure; Module function; Anti-interference methods.
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