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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: 1 August 2015

Jay T. Worobets, Emma R. Skolnik and Darren J. Stefanyshyn

Far infrared radiation (FIR) has been shown to have physiological effects when used as a treatment modality for certain medical conditions. Athletic apparel are currently…

Abstract

Far infrared radiation (FIR) has been shown to have physiological effects when used as a treatment modality for certain medical conditions. Athletic apparel are currently commercially available that are constructed with fabrics that purportedly emit FIR. If apparel with this technology are capable of inducing positive physiological effects, then there may be important implications when worn by an athlete during exercise. The purpose of this study is to examine whether FIR apparel has an effect on oxygen consumption during exercise at submaximal intensities. Twelve male cyclists have completed submaximal incremental cycling tests. Each subject is tested on 4 separate days, twice while wearing a full body Control garment, and twice while wearing a similar garment made out of FIR fabric. Throughout each cycling test, the volume of oxygen uptake is monitored by using a breathing mask and metabolic analysis cart. At lower cycling intensities, the subjects consume statistically significantly less oxygen when wearing the FIR apparel compared to the Control garment, despite performing the same amount of mechanical work. Additional research is required to determine the implication of this effect for a training or competing athlete; however, the results indicate that this apparel technology does elicit a physiological effect.

Details

Research Journal of Textile and Apparel, vol. 19 no. 3
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 1 June 2002

Toshinari Nakajima, Yuki Hachino and Haruko Yamano

The effectiveness of the far infrared radiation processing cloth as clothing material is discussed. Temperature rise of the irradiation plane is more rapid than the…

Abstract

The effectiveness of the far infrared radiation processing cloth as clothing material is discussed. Temperature rise of the irradiation plane is more rapid than the heating by heat conduction and convection for the radiant heating. Skin temperature change and thermal sensation of the examinee wearing the sweater with a plastic heater at back were examined. “The relation of the inverse proportion of heat intensity to the time needed until the extent of thermal stimulation perceived was examined. Individual examinees tested, by oral contact, the extent of the pleasant sensation produced by the warming condition. They judged the extent of the warming according to whether it felt comfortable. Individually, they differed a great extent in their opinion of what was comfortable. However, for all examinees, the relationship of warming and feeling comfortable was confined within narrow parameters. In this experiment, a unit of the radiant heat stimulation was determined by dividing mW/cm2 by the warming period, since intermittent warming was carried out.” The degree of the skin temperature perceived by the sensation was almost fixed at 33–35, even if the radiant heat strength differed. The rapid thermal stimulation by radiant heating can be perceived even for a slight temperature rise of the skin. It is also necessary to consider the temperature rise speed, except for the temperature rise of the cloth surface, when the effectiveness of the far infrared radiation processing cloth was discussed.

Details

International Journal of Clothing Science and Technology, vol. 14 no. 3/4
Type: Research Article
ISSN: 0955-6222

Keywords

Open Access
Article
Publication date: 4 August 2021

Ian L. Gordon, Seth Casden and Michael R. Hamblin

This study aims to test the effects of Celliant armbands on grip strength in subjects with chronic wrist and elbow pain. Celliant® is a functional textile fabric…

Abstract

Purpose

This study aims to test the effects of Celliant armbands on grip strength in subjects with chronic wrist and elbow pain. Celliant® is a functional textile fabric containing minerals that emit infrared radiation (IR) in response to body heat. IR-emitting fabrics have biological effects including the reduction of pain and inflammation and the stimulation of muscle function.

Design/methodology/approach

A randomized placebo-controlled trial recruited 80 subjects (40 per group) with a six-month history of chronic wrist or elbow pain (carpal tunnel syndrome, epicondylitis or arthritis) to wear an armband (real Celliant or placebo fabric) on the affected wrist or elbow for two weeks. Grip strength was measured by a dynamometer before and after the two-week study.

Findings

For the placebo group, the mean grip strength increased from 47.95 ± 25.14 (baseline) to 51.69 ± 27.35 (final), whereas for the Celliant group, it increased from 46.3 ± 22.02 to 54.1 ± 25.97. The mean per cent increase over the two weeks was +7.8% for placebo and +16.8% for Celliant (p = 0.0372). No adverse effects was observed.

Research limitations/implications

Limitations include the wide variation in grip strength in the participants at baseline measurement, which meant that only the percentage increase between baseline and final measurements showed a significant difference. Moreover, no subjective measurements of pain or objective neurophysiology testes was done.

Practical implications

Celliant armbands are easy to wear and have not been shown to produce any adverse effects. Therefore, there appears to be no barrier to prevent widespread uptake.

Social implications

IR-emitting textiles have been studied for their beneficial effects, both in patients diagnosed with various disorders and also in healthy volunteers for health and wellness purposes. Although there are many types of textile technology that might be used to produce IR-emitting fabrics, including coating of the fabric with a printed layer of ceramic material, incorporating discs of mineral into the garment, the authors feel that incorporating ceramic particles into the polymer fibers from which the fabric is woven is likely to be the most efficient way of achieving the goal.

Originality/value

Celliant armbands appear to be effective in painful upper limb inflammatory disorders, and further studies are warranted. The mechanism of action is not completely understood, but the hypothesis that the emitted IR radiation is absorbed by nanostructured intracellular water provides some theoretical justification.

Details

Research Journal of Textile and Apparel, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 27 July 2018

William Vaughn McCall, Alan Letton, Jordan Lundeen, Doug Case and Francisco J. Cidral-Filho

The application of far-infrared energy to skin is expected to lead to vasodilatation of the skin surface, consequently warming the skin, and promoting sleep induction. The…

Abstract

Purpose

The application of far-infrared energy to skin is expected to lead to vasodilatation of the skin surface, consequently warming the skin, and promoting sleep induction. The purpose of this paper was to test whether bedsheets impregnated with bioceramic far-infrared technology would improve the perception of sleep in a sample of healthy adults.

Design/methodology/approach

Twenty-nine adults consented to participate, randomizing 17 to the far-infrared bedsheets and 12 to the control bedsheets. Two of the control participants dropped out prior to randomization and prior to completing any assessments and therefore are excluded from the analyses. After baseline assessment, participants slept on their randomly assigned sheets for five weeks, followed by a one week “wash out”. Insomnia symptoms were assessed with the Insomnia Severity Index, depression symptoms with the Patient Health Questionnaire, “vigor” and “fatigue” with the Profile of Mood States, and napping behavior with daily sleep diaries.

Findings

During the period of randomization, the participants on the far-infrared sheets reported fewer insomnia symptoms and less napping. This advantage was lost during the wash out period.

Originality/value

Far-infrared technology produces benefits on reported sleep in healthy normal adults.

Details

Research Journal of Textile and Apparel, vol. 22 no. 3
Type: Research Article
ISSN: 1560-6074

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Article
Publication date: 1 June 2002

Roshan Shishoo

This paper outlines the innovations in high functional and high performance fibres for applications in protective clothing, including fibres for flame and heat protection…

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Abstract

This paper outlines the innovations in high functional and high performance fibres for applications in protective clothing, including fibres for flame and heat protection. It also describes some typical woven and non‐woven constructions for such applications. And presents the trends in producing smart textile materials, capable of interacting with human/environmental conditions.

Details

International Journal of Clothing Science and Technology, vol. 14 no. 3/4
Type: Research Article
ISSN: 0955-6222

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Article
Publication date: 16 October 2018

Pedro Pérez-Soriano, Roberto Sanchis-Sanchis, Inmaculada Aparicio and Alfonso Martínez-Nova

Performing physical activity and sports generates a wide range of physiological alterations and adaptations. Several different textiles can help to improve some of these…

Abstract

Purpose

Performing physical activity and sports generates a wide range of physiological alterations and adaptations. Several different textiles can help to improve some of these processes. The purpose of this paper is to review the literature addressing the physiological effects of textiles with bioceramic materials in physical activity and sports.

Design/methodology/approach

A search was carried out in the scientific literature available in Web of Science, Scopus, PubMed and SportDiscus. In total, 295 records were identified through the database search; after removing duplicates and reading the title and abstract, only 4 articles fulfilled the inclusion criteria. These were thus included in the qualitative synthesis.

Findings

The use of bioceramic garments affects thermoregulation, helps to reduce body temperature during physical activity, provide better sweat evacuation and lower bacterial growth, improves performance, and facilitates recovery after exercise.

Originality/value

There are few scientific studies that analyse the use of bioceramic garments; however, it is difficult to demonstrate the validity of this type of garment. Therefore, future studies are necessary to analyse their suitability in this area.

Details

International Journal of Clothing Science and Technology, vol. 30 no. 6
Type: Research Article
ISSN: 0955-6222

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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. 93 no. 10
Type: Research Article
ISSN: 1748-8842

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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 February 1996

In GB patent 2283 489, Delta Resins Ltd describes infrared curing of resins, resin systems and other catalysed systems. Infrared radiations are at the temperature…

Abstract

In GB patent 2283 489, Delta Resins Ltd describes infrared curing of resins, resin systems and other catalysed systems. Infrared radiations are at the temperature corresponding to the peak frequency characteristic of the spectrum of the curing reaction of the particular system. Irradiation may take place in an oven with electrical elements controllable to attain temperatures the to nearest 0.1 °C, or in catalytic gas burners to thus provide infrared radiation of the optimum frequency. An example of curing all epoxy resin systems is given. Curing times of about ten minutes are achieved.

Details

Pigment & Resin Technology, vol. 25 no. 2
Type: Research Article
ISSN: 0369-9420

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