Flow rate measurement based upon temperature cross-correlation

ZHANG Shaozhi; JIANG Qing; BAI Chongyan; CHEN Guangming

doi:10.3969/j.issn.0438-1157.2014.z2.019

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Flow rate measurement based upon temperature cross-correlation

更新时间：2025-12-10

- Flow rate measurement based upon temperature cross-correlation
- CIESC Journal Issue z2, Pages: 124-128(2014)
- 作者机构：
  
  浙江大学制冷与低温研究所,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.z2.019
  CLC： K313
- Online First：30 December 2014，
  
  Published：30 December 2014
- 稿件说明：
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ZHANG Shaozhi, JIANG Qing, BAI Chongyan, et al. Flow rate measurement based upon temperature cross-correlation[J]. CIESC Journal, 2014, (z2): 124-128.
DOI：

ZHANG Shaozhi, JIANG Qing, BAI Chongyan, et al. Flow rate measurement based upon temperature cross-correlation[J]. CIESC Journal, 2014, (z2): 124-128. DOI： 10.3969/j.issn.0438-1157.2014.z2.019.

摘要

对基于温度互相关法的非侵入式水流量测量方法进行了初步的实验研究。将保温管路中两点温度作为直接被测信号

利用互相关法进行数据分析

用Matlab求出信号相位差

即延迟时间

进而得到流速和流量。结果表明:两测点温度差的平方和最小作为两者相似的判断条件

能够使估算出的流量与流量计实测流量差别在10%以内。结合无线温度采集网络技术

基于温度互相关法的流量测量在暖通空调工程中的应用值得关注。

Abstract

Preliminary experiments were carried out to study a non-intrusive method for measuring water flow rate based upon temperature cross-correlation. Through monitoring two temperature points in an insulated pipe

the data were analyzed with cross-correlation algorithm using Matlab software

and the delay time between the two points was estimated

thus the flow velocity and rate were obtained. The results showed that the estimated flow rate could agree with the measured value within an error of 10% if the minimum of the sum of square of the temperature differences was adopted as the optimization target. If combined with wireless temperature sensor network

the application of flow rate measurement based upon temperature cross-correlation may be anticipated in HVAC engineering.

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