Unlock instant, AI-driven research and patent intelligence for your innovation.

A data processing method for transient measurement of thermal physical properties of materials by hot wire method

A technology of data processing and thermophysical parameters, which is applied in the field of heat and heat transfer to improve the measurement accuracy

Active Publication Date: 2022-06-03
SOUTHWEAT UNIV OF SCI & TECH
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] This series of problems shows the fact that it seems that the general theory of transient measurement of thermal physical properties of materials established by the hot wire method and the derived calculation formulas directly applied to the one-dimensional cylindrical heat transfer model cannot be directly used for the instantaneous measurement of thermal properties of materials by the hot wire method. Data Calculation of Thermophysical Properties of State-Measured Materials

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
  • A data processing method for transient measurement of thermal physical properties of materials by hot wire method
  • A data processing method for transient measurement of thermal physical properties of materials by hot wire method
  • A data processing method for transient measurement of thermal physical properties of materials by hot wire method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] A data processing (calculation) method for transiently measuring thermal properties of materials by a hot wire method, comprising the steps of:

[0071] 1. Preparation steps

[0072] 1), make the standard sample of the material to be tested, the sample is two homogeneous cube samples;

[0073] 2), make a set of measuring instrument, the measuring instrument includes probe, constant current power supply, data collector and data processor;

[0074] 3), establish a physical mathematical model for solving the thermal properties of the material, write a software program according to the physical mathematical model, write out the code, and store it in the measuring instrument;

[0075] 2. Measurement steps

[0076] 1) Hold the probe in the middle of the two samples to make the hot wire fit with the central axis of the standard sample plane;

[0077] 2), pass a constant current to the probe;

[0078] 3) The probe sends the detected temperature signal to the data collector,...

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 discloses a data processing method for transient measurement of thermal physical properties of materials by a hot wire method. By modifying the calculation formulas of thermal conductivity λ and thermal diffusivity a in the method, it can more reflect the objectiveness of transient measurement of thermal physical properties of materials. The law can accurately obtain the measured values ​​of thermal conductivity, thermal diffusivity, constant pressure specific heat capacity and heat storage coefficient.

Description

technical field [0001] The invention belongs to thermology and heat transfer, and relates to a method for measuring thermophysical properties of materials. Background technique [0002] The general principle of transient measurement of material thermal properties by the hot wire method can be easily derived from the measurement device. During the heating process, the temperature change law at the contact interface between the hot wire surface and the medium is: [0003] [0004] In the formula, the slope [0005] [0006] intercept [0007] [0008] heat flux density [0009] [0010] In the formula, I represents the current passing through the hot wire, unit: ampere; R is the resistance of the hot wire, unit: ohm; r 0 is the radius of the hot wire, unit: m; l is the length of the hot wire, unit: m. [0011] Since (1) is a standard linear equation. Therefore, as long as a set of measurement devices are developed and experimental methods are used, a series of...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 陈昭栋霍冀川陈丕魏莎莎陈芬霍泳霖
Owner SOUTHWEAT UNIV OF SCI & TECH