分体装配式自给能传感器绝缘电阻影响因素分析

The Influence Factor Analysis of Insulation Resistance for the Assembly Self-powered Neutron Detector

为了比较分体装配式自给能传感器各参数对绝缘电阻的影响,以及进一步为了解决从传感器结构设计方面提高绝缘电阻的问题。本文将根据分体装配式自给能传感器结构特点,建立探头绝缘电阻、引线绝缘电阻以及整体绝缘电阻的计算模型。研究分析传感器探头内材料电阻率、发射体与绝缘壳体配合间隙、发射体偏心、发射体与芯线连接段长度以及引线电缆长度对绝缘电阻的影响。通过理论分析和计算,传感器引线电缆长度是影响整体绝缘电阻的关键因素,发射体偏心和配合间隙对整体绝缘电阻的影响可以忽略不计,尤其对于引线长度10 m以上的传感器。本文对自给能传感器的结构设计具有参考价值。

To compare the influence of each parameter on insulation resistance of the assembly self-powered neutron detector and to further solve the problem of improving installation from the aspect of structure design,insulation resistance models of the detector probe part,leader cable part and whole detector were established in this paper based on the structure characteristics of the assembly self-powered neutron detector.Influence of material resistivity,tolerance clearance between the emitter and the insulation shell,emitter eccentricity,connection length between emitter and signal conductor,and leader cable length on insulation resistance value was studied and analyzed.Through theoretical calculation,the influence of emitter eccentricity and tolerance clearance between the emitter and insulation shell on whole insulation resistance of the detector is negligible.The leader cable length of the detector is the critical factor for whole insulation resistance of the detector,especially for the self-powered neutron detector of which the leader cable length is more than 10 meters.This paper can provide reference for the structure design of self-powered neutron detector.