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요약정보
一种基于国产芯片的热电偶断线检测方法 / A Method of Thermocouple Broken Wire Detection Based on Domestic Chip
Resource Type
Academic Journal
Authors
许天骄
;
吴胜华
;
张楠桢
;
马伟东
;
Xu Tianjiao
;
Wu Shenghua
;
Zhang Nanzhen
;
Ma Weidong
Source
仪器仪表用户 / Instrumentation Customer
. 30(4):106-89
Subject
测温
国产ADC
热电偶
断线检测
可靠性
Language
Chinese
ISSN
1671-1041
Online Access
Find it @ DONGA
초록
热电偶作为温度测量仪表中常用的测温元件,具有测温准确度较高、结构简单、动态响应速度快,测温范围较宽等优点,在火电以及化工行业得到了大量的应用.本文就其工作原理以及如何设计基于国产ADC芯片的热电偶测量模件断线检测功能进行了详细的分析,具体方法为通过微处理器、比较器和模拟开关芯片,利用电压基准源,在无恒流源的情况下能够高效地实现现场热电偶信号输入回路的断线检测,既能简化电路缩减硬件成本,又能适配国产化热电偶测量模件,极大地保证了整个控制系统的安全性及可靠性.
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