Rapid heat-conducting property testing device and testing method thereof

A technology of thermal conductivity and testing device, applied in the direction of thermal conductivity of materials, etc., can solve the problems of not taking into account the environmental temperature, test result error, test operation, etc., and achieve the effect of intuitive test results

Pending Publication Date: 2020-03-17
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device uses a heat source and two points on the surface after heat conduction of the sample to measure the temperature, without considering the influence of the ambient temperature
In addition, the patent conducts heat transfer from one side to the other, and the galvanic couple wire is placed between the copper part and the sample, and only one point of temperature can be measured
[0006] Chinese patent CN206292196U discloses a test device for the thermal conductivity of thermally conductive silicone grease, including an electric heating element, a heat dissipation substrate, a support column, a temperature sensor, a protective cover, a switching power supply and a data recorder, and the support column is arranged on the bottom surface of the heat dissipation substrate At the four corners, the electric heating element is set on the heat dissipation substrate through bolts, the temperature sensor is arranged on the surface of the electric heating element and the upper and lower surfaces of the heat dissipation substrate, the protective cover covers the electric heating element and the heat dissipation substrate, and the positive and negative poles of the switching power supply are connected to the electric heating element. The power input end of the heating element and the signal output end of the temperature sensor are connected to the signal input end of the data recorder. This device can effectively test the thermal conductivity of materials, but because the device needs to tighten the bolts connecting the electric heating element and the heat dissipation substrate And the guaranteed torque is the same, which leads to higher requirements on the test operation during the test process, and the influence of the ambient temperature is not taken into account in the test process, resulting in certain errors in the test results

Method used

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  • Rapid heat-conducting property testing device and testing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 A kind of rapid thermal conductivity testing device shown is used to test the thermal conductivity of plastic spline 9, including base 4, the lifting translation assembly located on base 4, the infrared imager 2 located on the lifting translation assembly, and the The test heat source 3 at one end of the plastic sample 9, the three sample temperature test pieces 6 uniformly arranged on the plastic sample 9 at equal intervals along the length direction, and the ambient temperature test set on the base 4 and separated from the plastic sample 9 piece 8;

[0052] Wherein, the test heat source 3 is a rated LED lamp with a power of 3-5W, and the rated LED lamp is coated with heat-conducting silicone grease;

[0053] The lifting and translation assembly includes a support rod 1 vertically arranged on the base 4 and a horizontal movement rod 5 vertically slid on the support rod 1; the infrared imager 2 is horizontally slid on the horizontal movement rod 5.

...

Embodiment 2

[0057] In this embodiment, the thermal conductivity test performed on the plastic spline 9 using the rapid thermal conductivity testing device in Example 1 includes the following steps:

[0058] 1) Place the plastic sample strip 9 and the ambient temperature test piece 8 on the base 4;

[0059] 2) In the test heat source 3, that is, the rated LED lamp, the surface is coated with heat-conducting silicone grease, and fixed on one end of the plastic spline 9, and three spline temperature test pieces 6 are arranged at equal intervals along the length direction on the plastic spline 9

[0060] 3) adjusting the position of the infrared imager 2 through the lifting and translation components, so that the infrared imager 2 can capture the surface image of the plastic spline 9;

[0061] 4) Start the test heat source 3, and regularly record the temperature of the plastic spline 9 through the infrared imager 2 and the spline temperature test piece 6;

[0062] 5) After the temperature of...

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Abstract

The invention relates to a rapid heat-conducting property testing device and method. The device comprises a base, a lifting translation assembly, an environment temperature testing piece, an infraredimager, a testing heat source and sample strip temperature testing pieces, wherein the lifting translation assembly and the environment temperature testing piece are arranged on the base; the infraredimager is arranged on the lifting translation assembly; and the testing heat source and the sample strip temperature testing pieces are arranged on a plastic sample strip. The method comprises the following steps: 1) arranging the plastic sample strip and the environment temperature testing piece on the base; 2) arranging the testing heat source and the sample strip temperature testing pieces onthe plastic sample strip; 3) adjusting the position of the infrared imager through the lifting translation assembly; 4) starting the testing heat source, and recording the temperature of the plastic sample strip through the infrared imager and the sample strip temperature testing pieces; and 5) after the temperature is stabilized, obtaining the heat-conducting property of the plastic sample stripaccording to the infrared image and the temperature test data. Compared with the prior art, the device is simple in structure and simple and convenient to operate; the temperature distribution of thesample strip can be obtained through the infrared imager and a thermocouple, and the influence of the environment temperature is eliminated through the environment temperature detection piece, so thatthe detection result is more intuitive and reliable.

Description

technical field [0001] The invention belongs to the technical field of measuring thermal conductivity of materials, and relates to a rapid thermal conductivity testing device and a testing method thereof. Background technique [0002] In the process of thermal conductivity testing of plastics, in order to test the thermal conductivity of thermal conductivity plastics, it is necessary to determine a stable test method. At present, there are many testing methods for thermally conductive materials. According to the heat flow method, they can generally be divided into two types: steady state and unsteady state. Among them, the steady-state method takes a long time to test, and it takes several hours to get the result, and the test equipment is expensive. Among them, the wide test range and high precision are all related equipment of foreign companies. The non-steady-state method has a short test period, and usually only takes a few minutes for an experimental result, but the te...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N25/18
CPCG01N25/18
Inventor徐俊炜李文强周霆辛敏琦
OwnerSHANGHAI KUMHO SUNNY PLASTICS