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High-precision temperature measurement device for surface temperature of fatigue test sample

A technology for surface temperature and fatigue samples, which is applied in the direction of measuring devices, thermometers, thermometers, etc., can solve the problems of large measurement errors of temperature measuring components, and achieve the effect of high cost performance

Inactive Publication Date: 2012-09-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of large measurement errors of the existing temperature measuring elements, and the present invention provides a high-precision temperature measuring device for the surface temperature of fatigue samples

Method used

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  • High-precision temperature measurement device for surface temperature of fatigue test sample
  • High-precision temperature measurement device for surface temperature of fatigue test sample
  • High-precision temperature measurement device for surface temperature of fatigue test sample

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Experimental program
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specific Embodiment approach 1

[0019] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the fatigue sample surface temperature high-precision temperature measuring device, it comprises two fatigue test pieces 2, four temperature sensors 3, temperature measurement circuit 1, data acquisition card 4 and computer 5; Two fatigue test pieces 2 One of the fatigue test pieces is the fatigue test piece 2-1 to be tested, the other is the temperature compensation test piece 2-2, and the first temperature sensor 3-1 and the third temperature sensor 3-3 of the four temperature sensors 3 are attached to each other. On the fatigue test piece 2-1 to be tested, the second temperature sensor 3-2 and the fourth temperature sensor 3-4 are attached to the temperature compensation test piece 2-2, the first temperature sensor 3-1, the second temperature sensor 3 -2. The current signal output terminals of the third temperature sensor 3-3 and the fourth temperature sensor 3-4 are respec...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment is a further limitation of the high-precision temperature measuring device for the surface temperature of the fatigue sample described in Embodiment 1. The temperature measurement circuit 1 includes an absolute temperature measurement circuit 1-2 of the test piece, an absolute temperature measurement circuit of the compensation element Temperature measurement circuit 1-3, relative temperature measurement circuit 1-4 of the DUT and voltage signal total output port 1-5;

[0022] The current signal output by the first temperature sensor 3-1 is sent to the absolute temperature measurement circuit 1-2 of the DUT,

[0023] The current signal output by the second temperature sensor 3-2 is sent to the absolute temperature measurement circuit 1-3 of the compensator, and the current signal output by the third temperature sensor 3-3 and the current signal output by the fourth temperature sensor 3-4 are sent to the waiting circuit at the same time. Tes...

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment is a further limitation of the high-precision temperature measuring device for the surface temperature of the fatigue sample described in Embodiment 2. The absolute temperature measurement circuit 1-2 of the test piece and the absolute temperature measurement circuit 1-2 of the compensation piece 3 have the same structure;

[0027] The absolute temperature measurement circuit 1-2 of the test piece includes a first voltage stabilizing circuit 1-2-1, a first inverse proportional amplification circuit 1-2-2, a first precision full-wave rectification circuit 1-2-3 and A first voltage follower circuit 1-2-4;

[0028] The temperature signal input terminal of the first inverse proportional amplification circuit 1-2-2 is the signal input terminal of the absolute temperature measurement circuit 1-2 of the test piece or the absolute temperature measurement circuit 1-3 of the compensation piece;

[0029] The voltage-stabilizing signal output end of t...

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Abstract

The invention provides a high-precision temperature measurement device for a surface temperature of a fatigue test sample, relating to a temperature measurement device and solving the problem that the conventional temperature measurement element has a large measurement error. The high-precision temperature measurement device comprises two fatigue test pieces, four temperature sensors, a temperature measurement circuit, a data collecting card and a computer; one of the two fatigue test pieces is a fatigue test piece to be detected, and the other one of the two fatigue test pieces is a temperature compensation test piece; a first temperature sensor and a third temperature sensor of the four temperature sensors are adhered to the fatigue test piece to be detected, and a second temperature sensor and a fourth temperature sensor of the four temperature sensors are adhered to the temperature compensation test piece; current signal output ends of the four temperature sensors are respectively connected with four current signal input ends of the temperature measurement circuit; a signal measurement output end of the temperature measurement circuit is connected with a signal collecting input end of the data collecting card; and a signal collecting output end of the data collecting card is connected with a computer through a USB (Universal Serial Bus) serial interface. The high-precision temperature measurement device is used for measuring the surface temperature of the fatigue test sample.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a high-precision temperature measuring device for the surface temperature of a fatigue sample. Background technique [0002] With the rapid development of high-speed trains, higher quality requirements are put forward for materials. High-strength aluminum alloy is a new type of material specially developed in Japan for high-speed trains. It has the advantages of low density and high strength, and is widely used in the field of high-speed trains. In our country, this material is still in the stage of research and trial, and its performance directly affects people's personal and property safety. [0003] Using the method of energy conservation to study the fatigue properties of materials has become a hot spot in the field of damage mechanics. Accurate measurement of temperature is the key to the success of this method. Since the heat generation of aluminum alloy is not as obvious...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00G01K1/143
Inventor 刘雪松方洪渊张亮吴双辉张忠典
Owner HARBIN INST OF TECH