3D thermography for improving temperature measurements in thermal vacuum testing

Robinson, Dean W.; Simpson, Robert L.; Parian, Jafar Amiri; Cozzani, Alessandro; Casarosa, Gianluca; Sablerolle, S.; Ertel, H.

doi:10.1007/s12567-017-0167-3

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Therefore, by knowing both the directional emissivity and viewing angle, it is possible to correct the temperature accordingly. Examples can be found in [4,6] and moreover in [21], where the internal reflections due to concave surfaces of a complex test setup were also taken into account.It is worth noticing that in these publications the different sensors were rigidly linked together (mainly for calibration purposes and real-time data integration), and the trend was to strengthen this physical union (until obtaining, in the final form, a unique device such as "HeatWave" [9]). However, in some cases, it can be more convenient to keep the two devices decoupled and independent.…”

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3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications

et al. 2020

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Three-dimensional thermography is a recent technique—with various fields of application—that consists of combining thermography with 3D spatial data in order to obtain 3D thermograms, high information objects that allow one to overcome some limitations of 2D thermograms, to enhance the thermal monitoring and the detection of abnormalities. In this paper we present an integration methodology that can be applied to merge data acquired from a generic thermal camera and a generic laser scanner, and has the peculiarity of keeping the two devices completely decoupled and independent, so that thermal and geometrical data can be acquired at different times and no rigid link is needed between the two devices. In this way, the stand-alone capability of each device is not affected, and the data fusion is applied only when necessary. In the second part, the real effectiveness of our approach is tested on a 3D-printed object properly designed. Furthermore, one example of an application of our methodology in the cultural heritage field is presented, with an eye to preservation and restoration: the integration is applied to a marble statue called Madonna with the Child, a fine work of the Florentine sculptor Agostino di Duccio (1418–1481). The results suggest that the method can be successfully applicable to a large set of scenarios. However, additional tests are needed to improve the robustness.

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3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications

et al. 2020

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Experimental set-up of a thermal vacuum chamber for thermal model in-house correlation and characterization of the HYPSO hyperspectral imager

et al. 2023

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Space environment with changing temperatures and vacuum can affect the performance of optics instruments onboard satellites. Thermal models and tests are typically done to understand the optics performance within large space projects, but less often in nanosatellites projects. It is even more rarer for an optics payload inside a CubeSat platform, made by a third provider, to do functional tests on their optics during space environment test campaign. In this research, an in-house made vacuum chamber with the possibility to warm up (TVAC) the devices under tests, and wall-through transparency for optics experiments is set-up. In parallel, a thermal model of the HYPerspectral Small satellite for ocean Observation (HYPSO) Hyperspectral Imager (HSI) is developed. The HSI, which is a transmissive grating hyperspectral instrument ranged in the visible to near infrared wavelength, has been tested in TVAC. As thermal control is based on heating the device under test, a new method for fitting the thermal models inside vacuum chambers with only heating capability is proposed. Finally, the TVAC set-up and the thermal model fitting method have been demonstrated to be appropriate to validate the HSI thermal model, and to characterize the optics performance of HSI in vacuum and in the range of temperatures found inside the in-orbit HYPSO-1 CubeSat.

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A DIC method for thermal micro-deformation measurement of satellite high stability composite structure in simulated space environment

Tang

Chen

Liang

et al. 2023

Optics and Lasers in Engineering

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3D thermography for improving temperature measurements in thermal vacuum testing

Cited by 7 publications

References 4 publications

3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications

3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications

Experimental set-up of a thermal vacuum chamber for thermal model in-house correlation and characterization of the HYPSO hyperspectral imager

A DIC method for thermal micro-deformation measurement of satellite high stability composite structure in simulated space environment

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