基于车载式高清摄像机的道路照明检测系统研究

在国家标准的不断完善和道路照明检测行业的日渐进步下,更多的城市道路管理部门开始重点关注沿途路灯的实际工作状态及道路照明效果的现场情况分析。因此,参照相关研究成果,提出了一套基于高清摄像机的车载式道路照明检测系统的技术方案,方便城市道路管理部门确保现场测量人员的安全和更好地记录被测道路的现场情况,为后期分析道路照明效果提供科学有效的数据支撑。

太阳能路灯安装技术在青藏高原环境的应用探究

青藏高原大气层薄而清洁,透明度好,太阳辐射强,日照时间长,最适合太阳能发电。太阳能作为一种可再生新能源,因其安全、环保、节能、清洁越来越受重视,太阳能发电在路灯照明领域发展并应用已日趋完善,加大对太阳能资源的开发和利用是目前我国的国策之一。介绍利用青藏高原太阳能发电对厂区室外路灯智能控制系统的工作原理及安装措施。

守护光明的人

成都市的路灯工作者们几十年如一日，无论酷暑严冬，刮风下雨，始终坚守着自己的岗位，以至诚之意服务于城市，以至真之心关怀市民。本文细腻生动地描述了成都路灯人平凡而伟大的事迹，耐人寻味。

Development of the Operating Circuit for a LED Lamp Based on the Cockcroft-Walton Circuit

The operating circuits for LED （light emitting diode） lamp composed of diodes and DC capacitors only are proposed. The proposed circuit is based on a double-voltage rectifier circuit and a Cockcroft-Walton circuit. The circuit can operate LED without flicker, and is free from switching noise since high frequency switching circuit is not used. To replace an AC capacitor by a DC capacitor for the ballast, a diode is connected across the capacitor in parallel, and the operating voltage of LED unit is kept at the value greater than the peak voltage of the input power source. The circuit realizes high efficiency and high input power factor compared with the operating circuits on the market. Cockcroft-Walton-type circuit can operate many LED devices in series connection. Series connection is preferable for fabricating LED unit of a constant voltage characteristic. Moreover, fairly flat waveform of LED operating current is realized by Cockcrofl-Walton-type circuit, even though capacitor ballast is used.