工业智能热电阻温度隔离式安全栅的设计
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摘要
本文以热电阻信号为采集对象,依据本质安全防爆的基本原理,设计了工业智能热电阻温度隔离式安全栅。将快速熔断丝、限流电阻和并联限压齐纳二极管设计在电路中,它即可以作为智能型隔离温度变送器用,也兼顾石油化工等行业现场爆炸场所中限制现场电器设备能量的要求。
An industrial intelligent thermal resistance temperature isolated safety barrier collected thermal resistance signal is designed based the principal of intrinsic safety explosive protection in this paper. The rapid fuse, currentlimiting resistance and parallel pressure limiting zener diode are designed in the circuit. The safety barrier could be used as intelligent isolated temperature transmitter and it also could meet the requirements of limiting the energy of site electrical equipment in explosive area of petrochemical industry.
An industrial intelligent thermal resistance temperature isolated safety barrier collected thermal resistance signal is designed based the principal of intrinsic safety explosive protection in this paper. The rapid fuse, currentlimiting resistance and parallel pressure limiting zener diode are designed in the circuit. The safety barrier could be used as intelligent isolated temperature transmitter and it also could meet the requirements of limiting the energy of site electrical equipment in explosive area of petrochemical industry.
引文
[1]李迎.智能二线制温度变送器的研究[J].仪器仪表与检测技术,2004,23(6):67~70
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[2]孟祥群,申景双.PIC单片机在智能温度变送器中的应用[J].工业控制计算机,2005,18(9):58~63
[3]罗文广,吴彤峰.高准确度温度变送器的研制[J].传感器技术,2003,22(5):20~23
[4]Sanjaya Maniktala(美)著,王志强等译.精通开关电源设计[M].人民邮电出版社,2008,10,1
[5]刘凤君.现代高频开关电源技术及应用[M].电子工业出版社,2008.1.1.
[6]尚玉沛,石林锁,张振仁.最小二乘法在高精度温度测量中的应用[J].传感器技术.2000,19(1):47~48
[7]马石峰,王成端,唐述宏等.一种铂电阻4~20mA电流变送器电路[J].传感器技术,2000,19(1):39~43