王鹏祥，苗 雷，汤涛林，陈 军，刘世晶
（农业部渔业装备与工程重点开放实验室，中国水产科学研究院渔业机械仪器研究所，上海200092）

摘 要：雷电引发脉冲电磁场对微电子器件设备造成侵害已成为水产养殖自动化系统损坏的主要原因之一。经对系统的现场实际情况和雷电入侵途径分析，提出了直击雷、雷电感应和雷电波的防护措施。对控制房和DCS柜采用避雷针、独立针的直接雷防护；系统电源分别采用箱式电源避雷器、电源避雷器、模块式电源避雷器作为三级电源保护，减少LEMP雷电电磁脉冲辐射；计算机网络与等电位地网间设置低压避雷器或火花隙防止信号干扰和避免地电压反击；根据传输速率、工作电平、特性阻抗等，选择通信线路的信号防雷保护器的参数和型号。

关键词：水产养殖自动化；防雷保护；雷电电磁脉冲辐射；SPD浪涌保护

Lighting protection study for on-line water quality monitoring system in aquaculture
WANG Peng-xiang, MIAO Lei, TANG Tao-lin, CHEN Jun,LIU Shi-jing
（Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences,
Key Laboratory of Fishery Equipment and Engineering, Ministry of Agriculture, Shanghai 200092, China）

Abstract: The harm to the equipment of microelectronic devices, caused by Pulsed electromagnetic fields,
which is induced by lighting, has become one of the major reasons for system damage. This article proposes a measure for protecting the on-line water quality monitoring system against the direct lightning strike, lighting induction and lighting wave and a direct lighting protection method for protecting the control room and DCS cabinet using single lighting rod. For reducing the LEMP lighting electromagnetic pulse radiation, the electrical source uses the Box-type power supply arrester, the power supply arrester and the modular power supply arrester as the third SPD surge protection device. The Low-voltage surge arrester or spark gap is laid between the compute net and equipotential grounding grids for avoiding signal interference and counterattack of ground voltage. The parameter and model of the signal lighting-protector of lines of communication are chosen according to the transfer rate, work level and characteristic impedance.

Key words: aquaculture water quality monitoring; lighting protection; lightning electromagnetic pulse radiation; SPD surge protection device

基金项目：国家“863”高技术研发项目(2007AA10Z239)；国家“十一五”科技支撑计划项目(2007BAD43B06)；国家虾现代产业技术体系建设专项资金(nycytx-46)；国家鲆鲽类现代产业技术体系建设专项资金(nycytx-50)；公益性行业科研专项(nyhyzx-046)

作者简介：王鹏祥(1950—)，男，高级工程师，主要研究方向：养殖水质在线监控的系统集成。E-mail: pxw@fmiri.com

（来源：《渔业现代化》 2009，36（5）：23-26）