Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed...Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed.This paper introduces the architecture of the system.The system uses AVR micro controller unit(MCU),KYL-1020U RF module and SHT71 to complete real-time temperature and humidity monitoring,and uses SIM900A module to realize remote alarming and monitoring with short message system(SMS)through global system for mobile communication(GSM).Experimental results show that the designed system has good stability of measurement and real-time performance,and it can be used in some small temperature and humidity monitoring occasions.展开更多
探讨新型数字调制方式在广电信号传输中的应用、发展趋势及其面临的挑战。介绍高阶调制技术、正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)等手段在高清电视、卫星通信、移动广播及多媒体广播中的具体应用,阐述新型...探讨新型数字调制方式在广电信号传输中的应用、发展趋势及其面临的挑战。介绍高阶调制技术、正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)等手段在高清电视、卫星通信、移动广播及多媒体广播中的具体应用,阐述新型数字调制方式在提高频谱效率和信号稳定性方面的优势,指出高阶调制技术所带来的信号质量要求和解调复杂度等挑战,展望新型数字调制技术的发展趋势,为广电信号传输技术的持续创新与发展提供参考。展开更多
随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探...随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探讨这些技术存在的局限性,为电力系统的智能化转型提供坚实的理论支撑,确保电网运营的可靠性、安全性及高效性。展开更多
文摘Aiming at the actual demand for monitoring environmental information,a wireless sensing system for temperature and relative humidity(RH)monitoring based on radio frequency(RF)technology and mobile network was designed.This paper introduces the architecture of the system.The system uses AVR micro controller unit(MCU),KYL-1020U RF module and SHT71 to complete real-time temperature and humidity monitoring,and uses SIM900A module to realize remote alarming and monitoring with short message system(SMS)through global system for mobile communication(GSM).Experimental results show that the designed system has good stability of measurement and real-time performance,and it can be used in some small temperature and humidity monitoring occasions.
文摘探讨新型数字调制方式在广电信号传输中的应用、发展趋势及其面临的挑战。介绍高阶调制技术、正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)等手段在高清电视、卫星通信、移动广播及多媒体广播中的具体应用,阐述新型数字调制方式在提高频谱效率和信号稳定性方面的优势,指出高阶调制技术所带来的信号质量要求和解调复杂度等挑战,展望新型数字调制技术的发展趋势,为广电信号传输技术的持续创新与发展提供参考。
文摘随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探讨这些技术存在的局限性,为电力系统的智能化转型提供坚实的理论支撑,确保电网运营的可靠性、安全性及高效性。