一种硬件方式实现热式气体质量流量测量系统  

A Hardware Way to Realize the Circuit Design of Thermal Gas mass Flow Measurement System

作　　者：赵俊奎 邹明伟 顾晴雯 张汝纹 王燕 任杰 戚佳杰 ZHAO Junkui;ZOU Mingwei;GU Qingwen;ZHANG Ruwen;WANG Yan;REN Jie;QI Jiajie(Chongqing Chuanyi Automation Co.,Ltd,Chongqing 401121,China;Shanghai Nuclear Engineering Research&Design Institute,Shanghai 200000,China)

机构地区：[1]重庆川仪自动化股份有限公司,重庆401121 [2]上海核工程研究设计院有限公司,上海200000

出　　处：《自动化与仪器仪表》2022年第10期263-266,共4页Automation & Instrumentation

基　　金：国家科技重大专项(2019ZX06002006)。

摘　　要：基于模拟乘法器,设计了一种恒功率方式热式气体质量流量计,主要包括恒功率驱动电路、信号放大电路、信号电平反转电路、线性化电路、模拟量隔离和V/I转换电路,系统采用纯硬件电路实现,没有任何微处理器或FPGA参与,可以避免软件的不确定性和软件测量的滞后性,提升了系统对于流量监测的实时性,而且实现最快速的系统响应时间,同时在耐辐射方面性能优于基于微处理器实现方式。Based on analog multiplier,a constant power thermal gas mass flowmeter is designed,which mainly includes constant power drive circuit,signal amplification circuit,signal level reversal circuit,linearization circuit,analog isolation and v/i conversion circuit.The system is realized by pure hardware circuit without any microprocessor or FPGA participation,which can avoid the uncertainty of software and the lag of software measurement,The real-time performance of the system for flow monitoring is improved,and the fastest system response time is achieved.At the same time,the performance in radiation resistance is better than that based on microprocessor.

关 键 词：纯硬件 模拟量隔离 恒功率 

分 类 号：TH814[机械工程—仪器科学与技术]