电容式锅炉液位测量系统的设计  

Design of boiler level measuring system based on capacitance

作　　者：朱梦雅 毛玉蓉[1] 谢兴兵[1] ZHU Mengya;MAO Yurong;XIE Xingbing(Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学,武汉430100

出　　处：《工业仪表与自动化装置》2020年第2期37-41,共5页Industrial Instrumentation & Automation

基　　金：国家重大研发计划项目(2017YFC0601804);国家自然科学基金(40174082,41574064);油气资源与勘探技术教育部重点实验室(长江大学)开放基金资助项目(K2018-08)。

摘　　要：在工业生产中,锅炉液位是一项关键的控制参数,直接涉及到安全问题。利用电容充放电原理,电容式液位计可以在恶劣条件下继续工作而不受影响。该文设计了一种基于STM32F103C8T6的测量系统,用电容传感器实现物位与电容量的变换,采用交流电桥产生信号,通过XTR116输出4~20 mA电流,将信号的干扰减到最小。通过不同的滤波算法对数据结果分析处理,以现场液晶屏显示的方式输出结果。通过现场实验,系统性能稳定,能够满足工业测量液位的要求。The boiler liquid level is a key parameter which relate to security issues in industrial production.According to the principle of charging and discharging of the capacitor,liquidometer can work in severe conditions with no effect.This paper designs a measuring system based on STM32F103C8T6,and then AC bridge generates signals.In order to reduce the random signaling distribution,XTR116 is designed to transmit analog 4~20 mA signals over an industry standard current loop.Then analyze the data by filtering algorithm and output results on LCD display.Through field test,the measurement system was stable and it can meet the needs of most industrial field liquid level measurement.

关 键 词：锅炉液位 电容传感器 交流电桥 XTR116 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]