| 一种基于单传感器的热式气体流量测量方法 |
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| 引用本文： | 赵伟国,宋执环,黄震威. 一种基于单传感器的热式气体流量测量方法[J]. 传感技术学报, 2009, 22(3) |
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| 作者姓名： | 赵伟国 宋执环 黄震威 |
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| 作者单位： | 工业控制技术国家重点实验室浙江大学控制科学与工程学系,杭州,310027;中国计量学院计量测试工程学院,杭州,310018;工业控制技术国家重点实验室浙江大学控制科学与工程学系,杭州,310027;中国计量学院计量测试工程学院,杭州,310018 |
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| 摘 要： | 基于热传递的原理,提出了基于单一铂电阻的热式气体流量测量方法.首先研究了在不同温度和电流下铂电阻的温度特性.然后设计了流量测量系统的电路,分析了流量测量原理及温度补偿.最后通过恒温控制算法使铂电阻工作在2个不同的设定温度.由铂电阻的输出电压计算出气体的流量.实验结果表明该测量方法的测量精度优于1%.流量量程比近100:1.
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| 关 键 词： | 气体 流量测量 铂电阻 恒温控制 |
Thermal Gas Flow Measurement Based on Single Sensor |
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| ZHAO Weiguo,SONG Zhihuan,HUANG zhenwei. Thermal Gas Flow Measurement Based on Single Sensor[J]. Journal of Transduction Technology, 2009, 22(3) |
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| Authors: | ZHAO Weiguo SONG Zhihuan HUANG zhenwei |
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| Abstract: | A thermal gas flow measurement is proposed based on heat transfer principle of single platinum resistance. Firstly, the temperature characteristics are studied at different surrounding temperatures and various currents passing through the resistance. Then, the measurement principle and temperature compensation are analyzed under the developed circuit. Finally, The constant temperature algorithm is designed to control the sensor at two different temperature, and the gas flowrate is obtained from the output voltage of the sensor. The research results show that the measurement accuracy is within 1% and the ratio of the dynamic measurement range is close to 100:1. |
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| Keywords: | gas flow measurement platinum resistance constant temperature control |
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