In-Situ Measurement of Internal Temperature Distribution of Sintered Materials Using Ultrasonic Technique

Ihara, Ikuo; Tomomatsu, Takuya

doi:10.1088/1757-899x/18/2/022008

Cited by 16 publications

(5 citation statements)

References 7 publications

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“…It is noted that both the temperature at B which is the outer surface and the temperature dependence of the material should be given as known information in the inverse analysis. The detailed procedure of the method is described in References [13][14][15].…”

Section: Quantitative Determinations Of Temperature At Heated Surfacementioning

confidence: 99%

“…This kind of problematic situation usually occurs in frictional heating processes. To overcome the problem mentioned above, we have applied an effective method, socalled the ultrasonic thermometry [13][14][15], to the evaluation of the temperature of the friction surface as well as the temperature distribution beneath the surface. This method consists of an ultrasonic pulse-echo measurement and an inverse analysis coupled with a one-dimensional finite difference calculation.…”

Section: Quantitative Determinations Of Temperature At Heated Surface and Temperature Distribution In Materialsmentioning

confidence: 99%

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In Situ Monitoring of Temperature Rise in Friction Surface Using Ultrasonic Technique

Ihara

Aoki

2014

International Journal on Smart Sensing and Intelligent Systems

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In this work, the feasibility of the use of ultrasonic thermometry for in situ monitoring of temperature rise in friction surface has been examined. The ultrasonic thermometry that is a method providing internal temperature measurements by ultrasound is applied to temperature measurements of a friction surface at which temperature rise occurs due to friction, and an attempt is made to demonstrate in situ monitoring of transient variations in the friction surface temperature and temperature distribution beneath the surface. Those temperatures near the friction surface are quantitatively determined by an effective method consisting of ultrasonic pulseecho measurements and a finite difference calculation for estimating a one-dimensional temperature distribution along the direction of ultrasound propagation. The advantage of the method is that no boundary condition at the friction surface is needed. To demonstrate the practical feasibility of the method, the ultrasonic pulse echo measurements at 5 MHz are performed for a steel plate of 30 mm thickness whose single side is being rubbed with a felted fabric plate. The temperature at the friction surface and internal temperature distribution of the steel plate are measured during the rubbing process and the transient variations of the measured temperatures are obtained. Quick temperature rise of approximately 30 K at the friction surface is observed within a few seconds after the rubbing starts. It is noted that the temperatures measured by the ultrasonic method almost agree with those measured using thermocouples inserted into the steel plate. Thus, it has been demonstrated that the ultrasonic thermometry is a promising sensing means for in situ monitoring of temperatures at friction surface as well as beneath the surface.

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Section: Quantitative Determinations Of Temperature At Heated Surfacementioning

confidence: 99%

Section: Quantitative Determinations Of Temperature At Heated Surface and Temperature Distribution In Materialsmentioning

confidence: 99%

In Situ Monitoring of Temperature Rise in Friction Surface Using Ultrasonic Technique

Ihara

Aoki

2014

International Journal on Smart Sensing and Intelligent Systems

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“…A pre-stressed concrete structure is significantly affected by environmental temperature changes and material heat conduction, which generate a non-uniform temperature field and temperature stress, the latter of which is considered an important reason for the cracks in a structure [1,2]. Meanwhile, study results have indicated that a structure has positive temperature gradients caused by a temperature increase in the environment, resulting from the surface temperature of the structure being higher than the internal temperature, and that the effects of a negative temperature gradient caused by a decrease in temperature should not be ignored [3,4].…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of gradient of negative temperature for polypropylene fiber concrete U-shaped girder

Dong

Cui

et al. 2020

MATEC Web Conf.

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To study the negative temperature gradient models of a rail transit U-shaped girder during the winter season, a U-shaped rail transit girder was researched in Qingdao. The temperature field of the midspan section was observed for a 48-h period during the winter. The maximum vertical and horizontal temperature difference distributions were obtained, and the negative temperature gradient models for the winter were established. The results show that the vertical temperature gradient models of the web and bottom slab should be considered. The vertical temperature gradient model of the web is a piecewise function composed of exponential and linear functions. The vertical temperature gradient model of the bottom slab is an exponential function. The transverse temperature gradient of the web is obvious, whereas the transverse temperature gradient of the bottom slab is slight.

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“…Most present methods provide information about either the surface temperature or the volumetrically averaged temperature, neither of which may be representative of the internal temperature of the solid. Only very limited work exists on measuring internal temperature of solids [26][27][28][29]. For example, the temperature dependence of speed of ultrasonic waves through a solid has been utilized to measure the average temperature along a path through the solid by measuring the time of flight of an ultrasonic wave along that path [28][29].…”

Section: Introductionmentioning

confidence: 99%

Contactless, non-intrusive core temperature measurement of a solid body in steady-state

Anthony

Sarkar

Jain

2016

International Journal of Heat and Mass Transfer

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Accurate measurement of temperature is critical for understanding thermal behavior and monitoring safety and performance of engineering systems involving heating and cooling. While a number of methods are available for measurement of temperature on the outside surface of solid bodies, there is a lack of contactless, non-invasive methods for determining temperature inside solid bodies. Development of such methods is likely to impact a wide range of engineering systems. This paper describes and validates a method for measurement of internal temperature of a solid body based on measurement of the temperature distribution on its outside surface. A theoretical model is developed for determining the core temperature of a cylinder based on surface temperature measurement. This method is validated by determining the core temperature of a thermal test cell using infrared temperature measurement on the surface, and comparing with measurements from an embedded thermocouple. The two measurements are found to agree well with each other in a variety of heat generation and cooling conditions. While this validation is presented for a cylindrical body, the method lends itself easily to bodies of other shapes. This work contributes towards fundamental thermal metrology, with possible applications in a wide variety of engineering systems.

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In-Situ Measurement of Internal Temperature Distribution of Sintered Materials Using Ultrasonic Technique

Cited by 16 publications

References 7 publications

In Situ Monitoring of Temperature Rise in Friction Surface Using Ultrasonic Technique

In Situ Monitoring of Temperature Rise in Friction Surface Using Ultrasonic Technique

Experimental analysis of gradient of negative temperature for polypropylene fiber concrete U-shaped girder

Contactless, non-intrusive core temperature measurement of a solid body in steady-state

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