security circuits

Combining with the request that security and reliability of PLC-control system and responsibility of equipment and designer,the author elaborates the characters and requests that security circuits designing of PLC-control system,proposing the implementation of security circuits designing.

结合PLC控制系统对安全、可靠性要求,设备设计人员职责,阐述PLC控制系统安全电路设计要点和要求,提出安全电路设计、实现方法。

The assessing principle of intrinsically safe circuits was introduced.

直流低压本质安全电路在IEC火花试验装置上进行爆炸检测时会产生电弧放电。

Evaluation of inductive intrinsically safe circuit basedon linear current attenuation model;

应用放电电流线性衰减模型评价电感性本质安全电路

The paper introduces the hardware structure,software realization and improved safety spark tester for intrinsically safe circuit controlled by the single-chip microcomputer,thus promoting the efficiency of spark testing and achieving comparatively exact test results.

本文介绍基于单片机控制实现的本质安全电路用火花试验装置的硬件结构、软件实现及改进后的火花试验装置,可提高火花试验的效率,并得到比较准确的试验结果。

Based on the current linear attenuation model and the idea of minimum arcing voltage in inductive intrinsically safe circuit, the authors establish the principle for choosing L/R ratio assuredly by using the intrinsic safety discriminant of inductive circuit and express the discharge time with known circuit parameters.

基于电感性本质安全电路放电电流线性衰减模型 ,引入最小建弧电压的概念 ,得到了放电时间不含未知参数的表达式 ,利用电感电路的本质安全性能判别式 ,确定了电感电阻比 L/R的选取原

Based on theoretical analysis of intrinsic safety circuit, a computer evaluation software of intrinsic safety circuit is programmed by using VB.

在本质安全电路理论分析的基础上 ,利用VisualBasic语言编制了本质安全电路的计算机评估软件。

Innovate security management to guarantee survival and development of enterprises;

创新安全管理 保障企业生存发展

Application of grey correlation analysis approach to the urban eco-security evaluation;

灰关联分析在城市生态安全评价中的应用

Preliminary Study on the security of Backpacker Tourism in the remote countryside;

偏远农村地区背包旅游安全问题初步研究