多编码棒三态码电感控制棒位置指示系统  

Tri-code inductance control rod position indicator with several multi-coding-bars

作　　者：施继斌[1] 蒋跃元[1] 王文然[1] 

机构地区：[1]清华大学核能技术设计研究院,北京100084

出　　处：《核电子学与探测技术》2004年第4期431-434,399,共5页Nuclear Electronics & Detection Technology

摘　　要：提出了一种结构简单、工作可靠、测量精度高的控制棒位置指示系统——多编码棒三态码电感控制棒位置指示系统。该系统探测器由K个测量线圈、一个补偿线圈和K根编码棒组成,每根编码棒均由若干段强导磁材料、若干段弱导磁材料与数段非导磁材料按规律间隔分布构成。当K根编码棒随控制棒在K个测量线圈中央轴向运动时,导致线圈的感抗发生变化,线圈输入的交变恒流信号在测量线圈上产生随感抗发生变化的电压信号。对信号进行适当的处理,可获得表征棒位的三态码。详细地介绍了该系统探测器的编码原理与硬件结构。结论表明:它比现役压水堆使用的线圈编码棒位指示系统性能优越,完全满足供热堆的棒位测量要求。A control rod position indicator named as tri-code inductance control rod position indicator with multi-coding-bars, which possesses simple structure, reliable operation and high precision, is developed in this paper. The detector of the indicator is composed of K coils, a compensatory coil and K coding bars. Each coding bar consists of several sections of strong magnetic cores, several sections of weak magnetic cores and several sections of non-magnetic portions. As the control rod is withdrawn, the coding bars move in the center of the coils respectively, while the constant alternating current passes the coils and makes them to create inductance alternating voltage signals. The outputs of the coils are picked and processed, and the tri-codes indicating rod position can be gotten. Moreover, the coding principle of the detector and its related structure are introduced in this paper. The analysis shows that the indicator owns more advantages over the coils-coding rod position indicator, so it can meet the demands of the rod position indicating in NHR.

关 键 词：编码棒 多态码 供热堆 控制棒位置指示系统 探测器 

分 类 号：TL363[核科学技术—核技术及应用] TH822[机械工程—仪器科学与技术]