Determination of temperature field in zone of cutting of diamond crystals by thermography

Bogdanovich, P. N.; Belov, V. M.; Tkachuk, D. V.

doi:10.3103/s1068366607010060

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Many of these systems, including microscale engineering systems, have dimensions of only a few micrometers or even tens of nanometers [1]. It has been shown that temperature measurements in earthquake physics [2], materials processes [3], diamond cutting [4], and hypersonic vehicles [5] also need to have a spatial resolution in the order of micrometers. Without a high spatial resolution and fast temperature measurement techniques, it is impossible to conduct experimental studies of the microscale thermal processes that occur in these systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of High Spatial Resolution of Two-Color Optical Fiber Pyrometer

Safarloo

Tapetado

Vázquez

2023

Sensors

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Taking non-contact temperature measurements in narrow areas or confined spaces of non-uniform surfaces requires high spatial resolution and independence of emissivity uncertainties that conventional cameras can hardly provide. Two-color optical fiber (OF) pyrometers based on standard single-mode (SMF) and multi-mode optical fibers (MMF) with a small core diameter and low numerical aperture in combination with associated commercially available components can provide a spatial resolution in the micrometer range, independent of the material’s emissivity. Our experiment involved using a patterned microheater to generate temperatures of approximately 340 °C on objects with a diameter of 0.25 mm. We measured these temperatures using two-color optical fiber pyrometers at a 1 kHz sampling rate, which were linearized in the range of 250 to 500 °C. We compared the results with those obtained using an industrial infrared camera. The tests show the potential of our technique for quickly measuring temperature gradients in small areas, independent of emissivity, such as in microthermography. We also report simulations and experiments, showing that the optical power gathered via each channel of the SMF and MMF pyrometers from hot objects of 250 µm is independent of distance until the OF light spot becomes larger than the diameter of the object at 0.9 mm and 0.4 mm, respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental Validation of High Spatial Resolution of Two-Color Optical Fiber Pyrometer

Safarloo

Tapetado

Vázquez

2023

Sensors

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“…In this study, we used a special tester, a compact infrared camera is mounted in the tester side. Unlike other end-face temperature measurement by thermography [3,4], this study investigated the temperature distribution at different depths into the specimen and combined results of thermocouple embedded in block to reduce the disadvantage of IR camera itself as well.…”

Section: Introductionmentioning

confidence: 99%

In-situ measurements of surface temperature fields on ring-block contact surface under friction using infrared thermography

You

2008

SPIE Proceedings

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Measurement of Surface temperature in friction has became attracted extensive attention in modern industry, especially in manufacture. When the temperature in friction exceed a given value, the wear of parts will be accelerated. Some of the failed parts exhibited enormous thermal damage. Infrared thermography(ITG), sometimes called infrared(IR) imaging system, provides a quantification of the degradation in thermal performance as the machine are working and can be used to identify degrading parts for replacement before failures become immanent. A novel test technique is described in which surface temperatures were measured during tests of a rotating ring and a flat block which had a thermocouples embedded under its contact surface. The technique involves measurement of the radiation emitted by a side of the specimen immediately adjoining the ring-block contact region using a Charge Coupled Device (CCD) based ITG. By using an appropriate calibration procedure, measured radiation values are converted to temperatures. Novel aspects of the experimental technique are non-intrusive and full-field dynamic measurement at high spatial resolution and high sensitivity. This technique should facilitate study of thermal damage and multi-scale of thermal models in friction.

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“…Temperature is an important parameter to be considered in many applications requiring high spatial resolution, for instance, microelectronics [ 18 , 19 , 20 ], combustion [ 21 , 22 ], electrical discharge machining [ 23 ], machining processes [ 5 , 6 , 7 , 24 ], laser beam separation [ 25 ] and diamond cutting [ 26 ]. Typically, in microelectronics, micro-Raman thermography is used for measuring the temperature of devices.…”

Section: Introductionmentioning

confidence: 99%

“…This also occurs in diamond cutting applications where the cutting zone is determined by the disc width (typically of 70 μm). These measurements are normally done with IR cameras [ 26 ] and the difficulty of knowing the target emissivity leads on to an inaccurate absolute temperature.…”

Section: Introductionmentioning

confidence: 99%

Optical Fiber Pyrometer Designs for Temperature Measurements Depending on Object Size

Núñez-Cascajero

Tapetado

Vargas

et al. 2021

Sensors

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The modelling of temperature measurements using optical fiber pyrometers for different hot object sizes with new generalized integration limits is presented. The closed equations for the calculus of the radiated power that is coupled to the optical fiber for two specific scenarios are proposed. Accurate predictions of critical distance for avoiding errors in the optical fiber end location depending on fiber types and object sizes for guiding good designs are reported. A detailed model for estimating errors depending on target size and distance is provided. Two-color fiber pyrometers as a general solution are also discussed.

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Determination of temperature field in zone of cutting of diamond crystals by thermography

Cited by 5 publications

References 6 publications

Experimental Validation of High Spatial Resolution of Two-Color Optical Fiber Pyrometer

Experimental Validation of High Spatial Resolution of Two-Color Optical Fiber Pyrometer

In-situ measurements of surface temperature fields on ring-block contact surface under friction using infrared thermography

Optical Fiber Pyrometer Designs for Temperature Measurements Depending on Object Size

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