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Surface emissivity tester

A surface emissivity, tester technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of infrared thermistor nonlinearity, inconvenient on-site installation, poor vibration resistance, etc., achieve strong electromagnetic compatibility, eliminate errors , the effect of reducing heat conduction

Active Publication Date: 2013-06-26
AECC SHENYANG ENGINE RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the existing surface emissivity tester, such as large volume, inconvenient on-site installation, poor vibration resistance, non-linearity of infrared thermistor and inaccurate test caused by zero drift of the tester. Emissivity Tester

Method used

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Embodiment

[0038] Combine now figure 1 , figure 2 Specific embodiments of the present invention will be described.

[0039] Such as figure 1 As shown, the present invention is made up of detector, circuit part, computer and power supply, and detector sends the infrared thermistor voltage signal reflecting surface emissivity to circuit part, and circuit part sends the signal after conditioning to computer to process, and power supply Power the circuit part.

[0040] The circuit part includes a drive unit, a signal conditioning unit and a data acquisition unit;

[0041] The drive unit is composed of a square wave generator, a square wave gating circuit and a switch circuit;

[0042] The signal conditioning unit consists of a regulated power supply, a resistance / voltage conversion circuit, a first low-pass filter circuit, a high-pass filter amplifier circuit, a rectification filter circuit, a second low-pass filter circuit, a zero-point shift circuit, an inverter, and a 2-to-1 analog s...

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Abstract

The invention relates to a surface emissivity tester, which is composed of a detector, a circuit part, a computer and a power supply, the detector sends an infrared thermistor voltage signal which reflects the surface emissivity to the circuit part, the circuit part sends the conditioned signal to the computer for processing, the power supply is partial power supply for circuit, the detector comprises a housing, an infrared emission source, an optically focused cylinder and an infrared thermistor, the infrared emission source and the infrared thermistor are respectively fixed in the housing, the lower transverse plane of the infrared thermistor is connected to the optically focused cylinder, the optical path emitted by the infrared emission source is symmetrical to the central axis of the optically focused cylinder by relative to the housing central axis, the leading-out wire of the infrared thermistor and the infrared emission source control line are respectively passed through a housing top cover and connected to the circuit part. The surface emissivity tester has the advantages that the surface emissivity tester can perform temperature compensating on non-linear characteristic of the thermistor, can eliminate the error brought by partial drift of the circuit, and increase the test precision. The surface emissivity tester can be conveniently used on different object surfaces for on-line real-time dynamic test of emissivity.

Description

[0001] technical field [0002] The invention belongs to optical test instruments, in particular to a surface emissivity tester, which is applied in the fields of non-contact temperature measurement, solar energy application, aircraft structure design and the like. Background technique [0003] In many industrial fields, it is necessary to know the parameter of the surface emissivity of the object, and the surface emissivity is affected by many factors, so it needs to be tested on-site in real time, so that the thermal radiation characteristics of the object surface can be studied more accurately. For example, in the field of non-contact temperature measurement, online accurate measurement of the surface emissivity of the object to be measured can make the measured temperature more accurate; in the field of solar energy applications, measuring the emissivity is conducive to finding materials with high absorption rates; in the design of aircraft structures , it is necessa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
Inventor 周建军叶林王德友葛俊峰蔚夺魁江先军陆海鹰邹建红张兴吴小军
Owner AECC SHENYANG ENGINE RES INST
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