数字化核测系统通信数据传输算法应用

Transmission Algorithm of Digital Communicating Data for Digital NDIS

数字化通信具有稳定性好、可靠性高的优点,越来越广泛应用于仪控系统,特别是新一代核电厂仪控系统。现在我国核电建设事业快速发展,引进了三代AP1000技术,但是大部分核测系统还是由国外厂商供货,尤其是数字化核测系统更是空白。在与现场核测仪表配套定制的数字化仪控系统设计中,需要考虑作为信号采集、处理、阈值比较和控制的各个环节,其中如何快速、智能地处理通信数据也是大家经常关注和研究的重点。数字化通信数据传输算法针对数字化核测系统的快速可靠的循环数据交互任务而设计,目的是解决系统采用的RS485高速数据总线由于自身的物理介质特点而造成的实时控制时间和设备带点量限制的问题。数字化核测系统多点数据信息量交换时,可通过该算法保证在限定系统扫描周期时间内,完成总线每次正常传输足够数据设备信息。

Taking the advantages of good stability and high reliability , digital communication are becoming a more critical component of instrument and control （ I＆amp;C） systems in nuclear plant power （ NPP） , especially for the next generation .With China＇s rapid development of NPP I＆amp;C of third generation AP 1000 technology , most of Nuclear Detecting Instrument System （ NDIS） are supplied by foreign manufacturer and digital NDIS is una-vailable in China .In the digital control system design customized for field nuclear instrument , all parts need to be taken into account for signal acquisition , processing , threshold comparison and control .Fast and intelligent communication data processing is often of concern and needs research .Transmission algorithm of digital commu-nicating data for NDIS is designed to solve the real -time-control problems in the amount of time and equip-ment limitation which caused by physical characteristics of RS 485 high-speed data bus .The algorithms in-clude data link establishment and link management , data subcontracting computing , and data test .In the case of limited system scan cycle time and multi -exchanged data of digital NDIS , it can guarantee the normal trans-mission of sufficient data for information of all devices .