&lt;title&gt;Precision large-area low- and medium-temperature blackbody sources&lt;/title&gt;

Sapritsky, Victor I.; Mekhontsev, S N; Prokhorov, Alexander; Sudarev, Konstantin A.; Khromchenko, Vladimir B.; Samoilov, M. L.

doi:10.1117/12.331338

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…However, extremely few researchers have investigated this type of portable and large-area blackbody system required for aerial infrared thermal imaging technology. Moreover, there has been negligible research on the development and evaluation of such portable and large-area blackbody systems worldwide [ 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication, and Performance Evaluation of Portable and Large-Area Blackbody System

Bae

Choi

Hong

et al. 2020

Sensors

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In this study, a portable and large-area blackbody system was developed following a series of processes including design, computational analysis, fabrication, and experimental analysis and evaluation. The blackbody system was designed to be lightweight (5 kg), and its temperature could exceed the ambient temperature by up to 15 °C under operation. A carbon-fiber-based heat source was used to achieve a uniform temperature distribution. A heat shield fabricated from an insulation material was embedded at the opposite side of the heating element to minimize heat loss. A prototype of the blackbody system was fabricated based on the design and transient coupled electro-thermal simulation results. The operation performance of this system, such as the thermal response, signal transfer function, and noise equivalent temperature difference, was evaluated by employing an infrared imaging system. In addition, emissivity was measured during operation. The results of this study show that the developed portable and large-area blackbody system can be expected to serve as a reliable reference source for the calibration of aerial infrared images for the application of aerial infrared techniques to remote sensing.

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Section: Introductionmentioning

confidence: 99%

Design, Fabrication, and Performance Evaluation of Portable and Large-Area Blackbody System

Bae

Choi

Hong

et al. 2020

Sensors

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“…Several types of calibration processes for using on-board calibration devices have been proposed and used in actual space programs [1][2][3][4][5]. Therefore, an on-board blackbody has been used to provide a uniform and precisely known radiance temperature target to calibrate the imaging sensor [2][3][4][5]. Furthermore, a tilting mirror calibration mechanism has been employed [6,7] to reflect the radiance from the blackbody on the sensors.…”

Section: Introductionmentioning

confidence: 99%

Experimental Design Validation of Tilting Calibration Mechanism by Using Shape Memory Alloy Spring Actuator

Lee

Kim

2017

International Journal of Aerospace Engineering

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A tilting calibration mechanism is periodically deployed to view the reference temperature target during on-board calibration of a spaceborne imaging sensor and stowed after calibration. In the present work, we have proposed a new design strategy using a shape memory alloy (SMA) spring as an actuator that provides a fail-safe function to prevent the blocking of the main optical path when the mechanical driving part of the mechanism is stopped at a certain position during on-board calibration. Although a launch locking device was not considered in the design, this approach makes it possible to impose mechanical constraints on the driving part of the mechanism in severe launch vibration environments. The effectiveness of the proposed design was experimentally validated by a deploying and stowing function test and launch vibration environment tests such as a sine burst test, a random vibration test, and a pyroshock simulating impulse shock test. The test results demonstrated that the mechanism fulfills all the required functions for on-board calibration. The use of an SMA spring actuator was proved effective for implementing the dual function of a fail-safe in an emergency phase and a mechanical constraint on the driving part of the mechanism in severe launch vibration environment.

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“…In addition, we considered an SMA actuator to implement a fail-safe function on a tilt mirror mechanism in emergency mode. To obtain a high-quality image through on-board calibration of the sensor, a highly uniform radiation source with a precisely known radiation temperature called an on-board black body 12) is required. To reflect the radiance temperature of the black body to imagers during on-board calibration, the tilt mirror is periodically deployed to view the black body during calibration, and stowed after calibration to avoid interference with the main optical path.…”

Section: Introductionmentioning

confidence: 99%

Spaceborne Tilt Mirror Mechanism and Application of Shape Memory Alloy Actuator to Implement Fail-safe Function in Emergency Mode

Lee³

et al. 2012

Trans. Japan Soc. Aero. S Sci.

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Shape memory alloy (SMA) actuators have been widely used for space applications. We used a SMA actuator to implement a fail-safe function on a tilt mirror mechanism for the on-board calibration of a spaceborne imaging sensor. The proposed mechanism prevents the blocking of a main optical path when the tilt mirror is stopped at a certain position during calibration. In the present work, the operation concept of tilt mirror, design, and functional test results of the tilt mirror mechanism have been introduced. The test results demonstrate that the proposed tilt mirror mechanism achieves all of the required deploying and stowing functions for on-board calibration. The use of a shape memory alloy actuator is shown to be effective for application to the fail-safe function of a mechanism driven by a geared stepper motor.

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<title>Precision large-area low- and medium-temperature blackbody sources</title>

Cited by 9 publications

References 5 publications

Design, Fabrication, and Performance Evaluation of Portable and Large-Area Blackbody System

Design, Fabrication, and Performance Evaluation of Portable and Large-Area Blackbody System

Experimental Design Validation of Tilting Calibration Mechanism by Using Shape Memory Alloy Spring Actuator

Spaceborne Tilt Mirror Mechanism and Application of Shape Memory Alloy Actuator to Implement Fail-safe Function in Emergency Mode

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