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Article
Publication date: 16 January 2017

Hanshan Li

The purpose of this paper is to evaluate the detection performance of infrared photoelectric detection system and establish stable tracking platform.

Abstract

Purpose

The purpose of this paper is to evaluate the detection performance of infrared photoelectric detection system and establish stable tracking platform.

Design/methodology/approach

This paper puts forward making use of the finite element analysis method to set up the infrared radiation characteristics calculation model of flying target in infrared photoelectric detection system; researches the target optical characteristics based on the target imaging detection theory; sets up the heat balance equation of target’s surface node and gives the calculation method of total radiation intensity of flying target; and deduces the target detection distance calculation function; studies the changed regulation of radiation energy that charge coupled device (CCD) gain comes from target surface infrared heat radiations under different sky background luminance and different target flight attitude.

Findings

Through calculation and experiment analysis, the results show that when the target’s surface area increases or the target flight velocity is higher, the radiation energy that CCD obtained is higher, which is advantageous to the target stable detection in infrared photoelectric detection system.

Originality/value

This paper uses the finite element analysis method to set up the infrared radiation characteristics calculation model of flying target and give the calculation and experiment results; those results can provide some data and improve the design method of infrared photoelectric detection system, and it is of value.

Details

Sensor Review, vol. 37 no. 1
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 14 November 2016

Yuye Wang, Guofeng Zhang and Xiaoguang Hu

Infrared simulation plays an important role in small and affordable unmanned aerial vehicles. Its key and main goal is to get the infrared image of a specific target…

Abstract

Purpose

Infrared simulation plays an important role in small and affordable unmanned aerial vehicles. Its key and main goal is to get the infrared image of a specific target. Infrared physical model is established through a theoretical research, thus the temperature field is available. Then infrared image of a specific target can be simulated properly while taking atmosphere state and effect of infrared imaging system into account. For recent years, some research has been done in this field. Among them, the infrared simulation for large scale is still a key problem to be solved. In this passage, a method of classification based on texture blending is proposed and this method effectively solves the problem of classification of large number of images and increase the frame rate of large infrared scene rendering. The paper aims to discuss these issues.

Design/methodology/approach

Mosart Atmospheric Tool (MAT) is used first to calculate data of sun radiance, skyshine radiance, path radiance, temperatures of different material which is an offline process. Then, shader in OGRE does final calculation to get simulation result and keeps a high frame rate. Considering this, the authors convert data in MAT file into textures which can be easily handled by shader. In shader responding, radiance can be indexed by information of material, vertex normal, eye and sun. Adding the effect of infrared imaging system, the final radiance distribution is obtained. At last, the authors get infrared scene by converting radiance to grayscale.

Findings

In the fragment shader, fake infrared textures are used to look up temperature which can calculate radiance of itself and related radiance.

Research limitations/implications

The radiance is transferred into grayscale image while considering effect of infrared imaging system.

Originality/value

Simulation results show that a high frame rate can be reached while guaranteeing the fidelity.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 9 no. 4
Type: Research Article
ISSN: 1756-378X

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Article
Publication date: 9 August 2021

Zongyao Yang, Yong Shan and Jingzhou Zhang

This study aims to investigate the effects of exhaust direction on exhaust plume and helicopter infrared radiation in hover and cruise status.

Abstract

Purpose

This study aims to investigate the effects of exhaust direction on exhaust plume and helicopter infrared radiation in hover and cruise status.

Design/methodology/approach

Four exhaust modes are concerned, and the external flow field and fuselage temperature field are calculated by numerical simulation. The infrared radiation intensity distributions of the four models in hovering and cruising states are computed by the ray-tracing method.

Findings

Under the hover status, the exhaust plume is deflected to flow downward after it exhausts from the nozzle exit, upon the impact of the main-rotor downwash. Besides, the exhaust plume shows a “swirling” movement following the main-rotor rotational direction. The forward-flight flow helps prevent the hot exhaust plume from a collision with the helicopter fuselage generally for the cruise status. In general, the oblique-upward exhaust mode provides moderate infrared radiation intensities in all of the viewing directions, either under the hover or the cruise status. Compared with the hover status, the infrared radiation intensity distribution alters somewhat in cruise.

Originality/value

Illustrating the influences of exhaust direction on plume flow and helicopter infrared radiation and the differences of helicopter infrared radiation under hover and cruise statuses are identified. Finally, an appropriate exhaust mode is proposed to provide a better IR signature distribution.

Details

Aircraft Engineering and Aerospace Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 28 August 2007

C.A. Smith

The purpose of the paper is to discuss the chemical characterisation of inorganic and organic materials found in electronic systems.

Abstract

Purpose

The purpose of the paper is to discuss the chemical characterisation of inorganic and organic materials found in electronic systems.

Design/methodology/approach

The paper provides an introduction to Fourier transform infrared spectroscopy, which is used for the chemical characterisation and analysis of materials. Examples from recent case studies are given to illustrate the work.

Findings

It was found that Fourier transform infrared spectroscopy can successfully identify materials at various stages of their lifecycle. By this means any contaminants and their resulting detrimental effects can be eliminated.

Originality/value

The paper demonstrates how the chemical analysis of a material is conducted, and what can be learned from the investigation.

Details

Circuit World, vol. 33 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

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Article
Publication date: 1 August 1999

Ian Bartley

This article describes the background to the widespread application of infrared radiation as a curing technique for paints and coatings, from its origins in the 1930s to…

Abstract

This article describes the background to the widespread application of infrared radiation as a curing technique for paints and coatings, from its origins in the 1930s to the present day. It explains the mechanism of infrared and elaborates on some of the developments which have been made in the technology, especially in terms of control and response. The benefits of infra‐red drying and curing are further illustrated by reference to case studies demonstrating infrared in action.

Details

Pigment & Resin Technology, vol. 28 no. 4
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 September 2005

Christine Connolly

To show the wide range of applications of infrared imaging being used in industry.

Abstract

Purpose

To show the wide range of applications of infrared imaging being used in industry.

Design/methodology/approach

Explains the recent cost reduction of infrared cameras, and reviews applications in product testing and quality control, process monitoring, structural inspection and fatigue limit measurement. Briefly reviews the capabilities of some off‐the‐shelf cameras.

Findings

That infrared imaging is a very powerful technique, bringing a whole new dimension of temperature detection to machine vision.

Originality/value

Highlights infrared imaging as a practicable and very valuable tool in industrial inspection.

Details

Assembly Automation, vol. 25 no. 3
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 1 February 1987

Infrared sensors are the fastest growing segment of a $1 billion a year temperature sensor market. Matt Guerreiri of Raytek explains why.

Abstract

Infrared sensors are the fastest growing segment of a $1 billion a year temperature sensor market. Matt Guerreiri of Raytek explains why.

Details

Sensor Review, vol. 7 no. 2
Type: Research Article
ISSN: 0260-2288

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Article
Publication date: 11 August 2020

Mingqi Gu, Wei Zhang, Shang Hao, Xiaochen Liu, Zichao Zhang and Fenjuan Shao

This study aims to explore the infrared imaging effect of fabrics coated with phase change material microcapsules (PCM-MCs), which are prepared by the initiation of…

Abstract

Purpose

This study aims to explore the infrared imaging effect of fabrics coated with phase change material microcapsules (PCM-MCs), which are prepared by the initiation of ultraviolet (UV) light.

Design/methodology/approach

PCM-MCs were prepared by UV polymerization using paraffin (PA) as core material, polymethyl methacrylate as wall material and ferric chloride as photoinitiator. The effects of emulsifier dosage and emulsification temperature on the properties of PA emulsion were investigated. Scanning electron microscopy, particle size analysis, infrared spectroscopy, differential scanning calorimetry and infrared imaging test were used to characterize the properties of microcapsules.

Findings

The PCM-MCs with good morphology and particle size were prepared with 25 cm of the distance between light source and the liquid. The average particle size was 1.066 µm and the latent heat of phase transition was 19.96 J/g. After 100 accelerated thermal cycles, the latent heat only decreased by 1.8%. It had good heat storage stability and thermal stability. The fabric coated by the microcapsules exhibited a variable temperature hysteresis effect when placed in the sun, and presented a color close to the infrared images of the human palm under the external environment temperature close to the human body temperature.

Research limitations/implications

The PCM-MCs prepared based on UV light initiation showed good thermal properties and its coated fabrics had an infrared decoy effect below the temperature of the human body.

Practical implications

This study explored the application of microcapsules in textiles.

Originality/value

The microcapsules had a certain application potential in infrared decoy effect.

Details

Pigment & Resin Technology, vol. 50 no. 2
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 10 August 2018

Yongliang Jin, Haitao Duan, Lei Wei, Song Chen, Xuzheng Qian, Dan Jia and Jian Li

This paper aims to investigate the tribological behavior and online infrared spectra of three types of lubricating oils containing dinonyl diphenylamine (DNDA…

Abstract

Purpose

This paper aims to investigate the tribological behavior and online infrared spectra of three types of lubricating oils containing dinonyl diphenylamine (DNDA) antioxidant, which are mineral oil (MO), poly alpha olefin (PAO) and trimethylolpropane trioleate (TMPTO), during the friction process at high temperature (temperature rising at first and isothermal holding afterwards).

Design/methodology/approach

A platform of low speed four-ball tribometer equipped with a temperature controller combined with infrared spectrometer was established. MO, PAO and TMPTO base oils were mixed with 1.0 Wt.% DNDA antioxidant, coded as MOa, PAOa and TMPTOa in sequence. The friction coefficient and online infrared spectra of the oils were tested during the friction process of temperature rising at first and isothermal holding afterwards, and the wear tracks of the upper balls were measured using a confocal scanning optical microscope.

Findings

The results indicated that the DNDA antioxidant was depleted to reduce the generation of alcohols and carbonyl products, and the depletion rate of DNDA followed the sequence of MOa > PAOa > TMPTOa. In the temperature rising friction process, the critical transition of friction coefficient was confirmed. The addition of DNDA antioxidant reduced the temperature of the oils at the critical transition of friction coefficient, and the temperature followed the sequence of TMPTOa > PAOa > MOa. After the critical transition, the friction coefficient was first increased and then declined to a steady value; the friction coefficient of MOa increased and declined first, followed by PAOa and TMPTOa. In the steady stage of friction, there was no obvious effect of DNDA on the friction coefficient of the oils. Moreover, DNDA enhanced the wear properties of MOa and PAOa; no obvious improvement was revealed for the wear property of TMPTOa.

Originality/value

The established platform of low speed four-ball tribometer combined with infrared spectrometer successfully realized online testing of the structure changes of lubricating oil during high temperature friction, which can give some reference on the oxidation and friction researches of lubricating oil.

Details

Industrial Lubrication and Tribology, vol. 70 no. 7
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 6 March 2009

Sooyong Lee

This paper aims to present a novel localization scheme using infrared light reflecting artificial landmarks.

Abstract

Purpose

This paper aims to present a novel localization scheme using infrared light reflecting artificial landmarks.

Design/methodology/approach

By putting the infrared light reflecting landmarks on the ceiling, localization is achieved. The landmark is designed for effective recognition and identification. From the difference of two successive images, one with the infrared light illumination and the other without, the landmarks are clearly identified.

Findings

From the mathematical analysis, a greater of landmarks are required if the robot's tilt angles are not known. With the camera's pan/tilt angles information, the distortion of the image can be corrected and fewer landmarks are required. Movement of the camera while getting two successive images is modeled and is compensated.

Originality/value

Thorough analysis of practical issues such as capturing the image from a non‐flat floor, pan/tilt motion of the camera and movement of the camera is presented.

Details

Industrial Robot: An International Journal, vol. 36 no. 2
Type: Research Article
ISSN: 0143-991X

Keywords

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