Accurate heat loss evaluation of water-cooled electric motors using a differential ultrasonic calorimeter

Hashmi, Anas; Light, Roger; Kalashnikov, Alexander; Malakoutikhah, Maryam

doi:10.1109/icsae.2016.7810158

Cited by 1 publication

(2 citation statements)

References 6 publications

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“…Fig. 1 [17] 22 kHz 50 Hz/K 0.10 m Implementation options for the electronic driver (including PSoC1*) were discussed [18] 25 kHz 25 Hz/K 0.10 m Comparison of ultrasonic thermometer architectures was conducted [19] 46 kHz 60 Hz/K 0.10 m Use of an UOTS for overnight measurements and observed hysteresis were reported [20] 25 kHz 20 Hz/K 0.10 m Simultaneous use of two UOTSes for the same process, modular design of the electronic driver, and thermal hysteresis for the recorded data were discussed [21] 27 kHz 30 Hz/K 0.10 m Differential temperature measurement using two UOTS was reported [22] 27 kHz 30 Hz/K 0.10 m UOTS and conventional temperature sensors were compared for a posteriori detection of the temperature extremum point *PSoC1 refers to the programmable systems on chip series 1 device, which is a highly versatile electronic part manufactured by Cypress Semiconductor.…”

Section: Development Of Ultrasonic Oscillating Temperature Sensorsmentioning

confidence: 99%

“…This problem was solved over time by improving the piezo materials, the temperature retention techniques and temperature-compensated devices [24]. We have recently presented several sets of UOTS experimental data obtained during heating/cooling cycles, which exhibited similar hysteresis [19][20][21].…”

Section: Hysteresis In Piezoelectric Transducers and The Possibility mentioning

confidence: 99%

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Sensor data fusion for responsive high resolution ultrasonic temperature measurement using piezoelectric transducers

Hashmi

Kalashnikov

2019

Ultrasonics

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Ultrasonic temperature measurement allows for responsive measurements across an entire ultrasonic pathway, unlike most conventional temperature sensors that respond to the temperature at the point of their placement only after a notable response time. The high cost of required ultrasonic instrumentation can be reduced substantially by using ultrasonic oscillating temperature sensors (UOTS) consisting of inexpensive narrowband piezo transducers and driving electronics. An UOTS produces sustained oscillations at a frequency that relates to the temperature of the medium between the transducers. The existence of thermal hysteresis in UOTS readings, observed experimentally and apparently related to the fundamental properties of piezoelectric materials, makes conversion of the output frequency readings to the temperature values ambiguous. This makes it complicated to calibrate and use UOTS on their own. In the reported experiment (heating, then naturally cooling of a water vessel equipped with both UOTS and conventional sensors), this hysteresis was solved by fusing UOTS data with conventional temperature sensor readings. As the result, the combination of one UOTS plus one conventional reference sensor allowed improving both the temperature resolution and responsiveness of the latter and ambiguity of the readings of the former. Data fusion effectively led to calibrating the UOTS at every change of the conventional sensor's reading, removing any concerns related to the thermal expansion/contraction of the ultrasonic pathway itself and/or hysteresis of piezoelectric transducers.

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Section: Development Of Ultrasonic Oscillating Temperature Sensorsmentioning

confidence: 99%

Section: Hysteresis In Piezoelectric Transducers and The Possibility mentioning

confidence: 99%

Sensor data fusion for responsive high resolution ultrasonic temperature measurement using piezoelectric transducers

Hashmi

Kalashnikov

2019

Ultrasonics

View full text Add to dashboard Cite

show abstract

Accurate heat loss evaluation of water-cooled electric motors using a differential ultrasonic calorimeter

Cited by 1 publication

References 6 publications

Sensor data fusion for responsive high resolution ultrasonic temperature measurement using piezoelectric transducers

Sensor data fusion for responsive high resolution ultrasonic temperature measurement using piezoelectric transducers

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