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高速公路电缆防盗报警系统信号检测方法的研究 总被引:1,自引:0,他引:1
高速公路电力电缆的被盗不仅直接对电力部门造成一定的经济损失,而且会对公路安全和人民的生命安全构成严重的威胁。而高速公路电缆防盗报警系统设计和研制的核心问题之一就是断缆信号的检测问题。本文主要阐述了目前电缆防盗报警系统设计中常用的信号检测方法,通过比较各种信号检测方法在实际应用中的优缺点,提出了在高速公路电缆防盗报警系统设计中最具发展潜力的信号检测方法是电力线载波通信法,并对电力线载波通信技术的国内外研究现状进行了介绍。最后对高速公路电缆防盗报警系统信号检测方法的发展趋势进行了简要的分析。 相似文献
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低压电力线载波通信的电缆防盗系统主要是针对低压配电缆经常被盗从而产生的,这一系统主要是由接收端、发送端构成的,这两个部分分别是安装在两端,发送端主要是以固定的时间通过间隔的形式进行载波信号的发送,载波信号是利用电缆进行传输的,如果接收端在接收两次信号的过程中超过了固定的时间间隔,那么就说明电缆已经被盗,因此,要重视低压电力线载波通信的电缆防盗系统. 相似文献
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介绍远程抄表系统中可采取的各种通信方式的基本原理和应用,包括终端数据采集模块与集中器之间可以采取的仪表总线Meter-Bus通信方式、集中器与抄表主站之间可采用的RS-485通信、电力线载波通信、微波通信等方式。同时对其应用设计各方面作了讨论和研究。 相似文献
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电力线载波通信技术是低压集中抄表技术实现的重要通信手段,由于电力线上衰减高,干扰强,阻抗不稳定等问题,容易造成电力线上载波通信失败,导致无法准确测试载波信号的相关参数。研究了低压电力载波测试终端的功能需求,提出一种基于嵌入平台的低压电力载波测试终端测试平台设计方法和性能测试的设计方案,设计了测试终端的硬件系统和软件架构,实验结果表示本文所设计的低压电力载波测试终端初步实现了载波信号的测试功能。 相似文献
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本文对通信机房的电磁干扰问题及相关规范做了详细的综述,并以某省通信生产楼拟建局址电磁环境的实测数据为例,对高压输变电系统对通信机房的电磁干扰影响进行分析和论证.对今后通信机房的建设及相关规范的更新与制定具有较好的参考价值. 相似文献
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In wireless communication systems, mobile users adapt to a time varying radio channel by regulating transmitter powers. This power control is intended to provide each user an acceptable connection, as measured by a carrier to interference ratio (CIR), by eliminating unnecessary interference. It is important that a power control algorithm can converge quickly to a fixed point at which either all users have acceptable connections or an infeasibility can be detected. In this work, we show that an iterative power control and base station assignment algorithm based on CIR measurements converges to a unique fixed point at a geometric rate. This conclusion is shown to hold even if some or all of the users are subject to maximum power constraints. The rate of convergence is evaluated by simulation of a one dimensional CDMA system. 相似文献
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In wireless communication systems, mobile users adapt to a time varying radio channel by regulating transmitter powers. This
power control is intended to provide each user an acceptable connection, as measured by a carrier to interference ratio (CIR),
by eliminating unnecessary interference. It is important that a power control algorithm can converge quickly to a fixed point
at which either all users have acceptable connections or an infeasibility can be detected. In this work, we show that an iterative
power control and base station assignment algorithm based on CIR measurements converges to a unique fixed point at a geometric
rate. This conclusion is shown to hold even if some or all of the users are subject to maximum power constraints. The rate
of convergence is evaluated by simulation of a one dimensional CDMA system.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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电力线载波技术由于能用在低压输电网上传送信号,因此将它应用于照明控制系统,相对于传统的照明控制系统,由于不再需要专门的控制线路或无线网络,具有良好的市场前景。本文开发了基于电力线载波通信技术的照明控制系统。在给出照明控制系统的总体设计方案后,选择一款高性价比的载波通信芯片,设计了照明控制系统的硬件电路。在参照OSI模型和借鉴现有的电力线载波通信协议的基础上,设计了照明控制系统使用的4层通信协议,并且使用C51语言设计了照明控制系统的驱动程序。 相似文献
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Constrained power control 总被引:3,自引:0,他引:3
High system capacities can be achieved by controlling the transmitter power in multiuser radio systems. Power control with no constraint on the maximum power level has been studied extensively in earlier work [1–18]. Transmitter power is at a premium in radio systems such as cellular systems and PCS. There is a limit on the maximum transmitter power especially at the terminals (e.g. mobile units and handsets) since the power comes from a battery. In this paper we study power control that maximizes the minimum carrier to interference ratio (CIR), with a constraint on the maximum power. The optimal power vector solution lies on the boundary of the constrained power vector set and achieves a balance in the CIR's. Results indicate that the constraints do not induce any stability problems. A distributed scheme with favourable convergence properties and close to optimum performance is presented. Simulation results show that the algorithm tries to maximize the number of terminals served with CIR greater than or equal to the target CIR, while conserving power. 相似文献
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Many important applications of single channel per carrier (SCPC) operation involve communication links between earth terminals whoseG/T values differ substantially. Typical links might connect a small community with the closest commercial center, or an offshore oil rig with a base station. In order to make the best use of the available satellite power, the levels of the carriers directed to the two earth terminals are adjusted in accordance with the respectiveG/T values. This paper extends results previously derived for the equal carrier case[1] and provides closed-form solutions for optimum transponder backoff and transponder capacity in terms of the link parameters for the case of two unequal carrier levels. 相似文献
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电力线载波通信面向广泛的设备对设备的数据交互和通信应用,具有免于部署,易于直连通信的优势,成为一种有效快捷的新型通信方式。但在使用中经常由于通信拥塞或电力干扰,造成各种通信故障,故需要高效的恢复机制保证数据可靠传输。本文引入多标记交换协议(MPLS)技术,设计了一种新型的电力线载波通信可区分故障恢复算法Diff_RECV,在考虑不同生存性服务质量(QoS)要求的同时,将保护恢复机制和重路径恢复机制结合,实现了区分流量保护与恢复。通过实验验证,所提出的Diff_RECV算法能够全部恢复故障业务流量,并且比扩散法有更高的恢复速度。 相似文献
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针对目前pH值监测采用传统的通信方式局限性,提出利用电力线载波技术传输pH值数据。本监测系统采用LPC2103微处理器和电力线载波通信模块作为pH值采集终端,将pH值数据通过电力线网络传输到上位机显示,实现对pH值的实时监测。 相似文献
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5G系统中的网络密集化使得网络节点数量更加庞大,导致无线通信系统能量损耗急剧增加,加重了运营商的经济负担,增加了CO2的排放.基于此,从能量损耗和经济层面两方面着手,综合考虑了备选基站组数量及新能源基站相对位置等因素,建立了在智能电网环境下的综合无线系统能量损耗模型.提出了一种基于能量损耗与能源代价均衡的基站休眠算法,该算法依据能量损耗确定备选基站组并从中选择能源代价最小的一组作为激活基站,从而实现能量损耗与能源代价的折中.仿真结果表明,所提算法以提高少量能源损耗为代价,显著降低了系统的能源代价. 相似文献