Dynamic temperature measuring method for correcting thermal inertia drift of system thermocouple

A dynamic temperature measurement and thermocouple technology, applied in the field of measurement, can solve the problem of thermocouple inertia coefficient drift and other problems

Active Publication Date: 2016-12-21
HUAZHONG UNIV OF SCI & TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic temperature measurement method that systematically corrects thermocouple thermal inertia drift, to solve the thermocouple inertia coefficient drift caused by radiation heat transfer, dual wire he

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic temperature measuring method for correcting thermal inertia drift of system thermocouple
  • Dynamic temperature measuring method for correcting thermal inertia drift of system thermocouple
  • Dynamic temperature measuring method for correcting thermal inertia drift of system thermocouple

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It is to be noted that these examples of embodiments are provided to help understanding of the present invention. However, the embodiments of the present invention are not limited thereto.

[0062] The first step is to establish a geometric model and a mathematical model for thermocouple dynamic temperature measurement according to the measured soot flame. The simulated flame is at temperature T s , the velocity is u s , diameter is D s cylindrical airflow. Generally, T is preset during calculation s higher than the measured flame temperature (T s =1800K), u s Close to the measured flame velocity (v s =1m / s), D s Greater than 10 times the thermocouple junction diameter (D s =0.02m), the thermocouple wires are butted (two wires are on the same straight line, and the length of each wire is 50mm), the node is located on the axis of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a dynamic temperature measuring method for correcting the thermal inertia drift of a system thermocouple. According to the method, thermocouples of different thermocouple wire/node diameters are simulated and analyzed in the numerical calculation mode. During the temperature response process in the flame, a thermocouple wire/node accouplement optimal in thermal inertia stability is screened out. According to the requirement of the above accouplement, a thermocouple is customized, so that the purpose of correcting the thermal inertia drift is achieved. During measurement, a thermocouple node is quickly moved into a specified measurement point in the flame. The temperature/time data of the thermocouple are recorded and analyzed by a data acquisition module and a computer. Based on the second-order difference quotient characteristics of a thermocouple temperature and time sequence, a time interval that is stable in thermal inertia is screened out. After that, the data treatment of a first-order system response equation is conducted in the above time interval, so that a thermal inertia coefficient and a flame temperature are obtained. The above method is wider in applicability and higher in accuracy compared with the traditional thermocouple temperature measuring method.

Description

technical field [0001] The invention relates to a dynamic temperature measurement method for systematically correcting thermocouple thermal inertia drift, belonging to the field of measurement technology. Background technique [0002] Thermocouple is a commonly used temperature measuring element in temperature measuring instruments. It directly measures the temperature and converts the temperature signal into a thermal electromotive force signal, which is convenient for the transmission, recording and processing of measurement data. Thermocouples can usually be divided into steady-state method and dynamic method in temperature measurement. The steady-state method is a more commonly used general method, which is suitable for occasions where the measured temperature is lower than the melting point of the thermocouple, and it needs to consider radiation and heat conduction error correction. For the measurement of high-temperature flames, in many cases, the measured temperature...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 赵海波徐祖伟
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap