基于Modbus协议的智能压力传感器研发

文中介绍了Modbus RTU通讯协议的特点,阐述了该协议在VB6.0编程环境下通过MSComm控件实现计算机与压力传感器通信的具体方法,并编制了相关的程序。实践证明,该程序编制思想合理、运行稳定、操作简便易行,为工业自动化中Modbus设备的调试带来方便。

从多视角看舞美设计的色彩

世界级画家列宾（俄罗斯）有过一句名言：“色彩即思想”。这句话不止适用于绘画艺术，而且适用于舞美设计。是色彩给了舞台美术以鲜活的艺术生命与动感的灵魂，织就了舞台上的亮丽风景和绚丽的艺术世界。

一种基于AFSS的可重构天线设计

针对5G智能天线双频工作,提出一种基于有源频率选择表面(active frequency selective surface,AFSS)的可重构天线,该天线由蝶形频率可重构馈源和八棱柱形AFSS构成,馈源采用的是共面波导方式馈电的蝶形单极子.AFSS由对称弯钩状缝隙的周期结构构成,通过PIN二极管进行加载,使得AFSS能够在3.4~3.6 GHz和4.8~5.0 GHz两个5G频段互为反射模式和透射模式.利用AFSS对馈源天线激励的电磁波进行空间调控,可实现两个频段的全向和定向波束的切换,也可实现水平面波束扫描.根据仿真设计的天线模型进行设计加工和实际测试,结果表明:该天线的工作频段可以覆盖以上两个频段,低频定向波束增益为7.6 dBi,高频定向波束增益为8.6 dBi;并且能实现高/低频双波段切换、全向/定向波束切换和水平面内360°波束扫描功能.该天线具有波束切换灵活、功耗低、造价低等特点,在新一代无线通信系统中具有一定的应用价值.

舞美与戏剧审美的关系

舞美是戏剧的一部分,可舞美必须跳出戏剧看戏剧。只有跳出戏剧看戏剧,才能清楚自己是戏剧的哪一部分,并且自觉地发挥自身的优长,使戏剧成为戏剧。戏剧受演出时间、演出地点、表现手段的制约,它的客观叙事性不同于史诗,它的主观抒情性也不同于抒情诗。

Design of C8051F350-based Intelligent Pressure Sensor

In order to overcome the deficiencies of traditional pressure sensors, a kind of intelligent pressure sensors with temperature correction is designed. Qccording to the intelligent sensor system of composition and range of applications, with fully taking into account the parameters of the connection between of co-ordination, we chose a good usability, high reliability and low cost components composed of the entire measurement system, with controlling and dealing with in 80C51 miller, the system had the temperature and pressure parameters with automatic measurement, amplification, A/D conversion, the weak signal locked amplification, as well as PhaseSensitive Detection （PSD）, common-mode signal rejection, the collected signal de-noising processing, cross-sensitivity of the decoupling and show the results. It also has a self-test, automatic temperature condition and on, site communications and other functions.