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This paper presents a BJT-based temperature sensor, which can be accurately trimmed in both ceramic and plastic packages, on the basis of purely electrical measurements at room temperature. This is achieved by combining the voltage-calibration technique from [1] with an on-chip heater, which can heat the sensing BJTs from room temperature to ∼85°C in 0.5s. Measurements show that the sensor can then...
We report on a precise in situ procedure to calibrate the heat flux sensor of a near-field scanning thermal microscope [1, 2]. This microscope is based on a scanning tunneling microscope which is equipped with a sub-micro sized, coaxial thermocouple with a tip apex radius of about 30 nm. The microscope is able to measure lateral changes in heat transfer with a resolution of about 7nm [3, 4]. The calibration...
In view of qualitative temperature measurement by scanning thermal microscopy, we introduce a model-based control law for a new microfabricated probe. The underlying model is the time-space two-scale electro-thermal model presented in [15], since it has the power to represent transcients of harmonic modulations. The control method accounts for an estimation of the heat source in the sample and for...
An innovative process is proposed for the calibration of thermometric devices, combining materials which change state at primary temperature calibration points defined in international standards, and electrical impedance measurement techniques. The process will use pure samples of such materials and a measurement apparatus which enables the automated matching of the elimination of measurement bias...
This work presents a CMOS temperature sensor designed specifically for distributed thermal monitoring systems of high-performance system-on-chips (SoCs). The sensor uses the temperature-dependent reverse-bias current of a p-n diode to monitor on-chip thermal profile. It occupies a small footprint of 550μm2 in a 0.18μm process. The compact size of the sensor allows its usage as a “standard cell"...
The continual trend of microelectronics to miniaturization, accompanied by the increase of the power density has given modern science a huge challenge. The thermal transport in an electronic device has to be addressed. Therefore, the fast and precise measurement of thermal properties like temperature, thermal conductivity and diffusivity is needed. Especially the spatial resolution needs to be enhanced...
Local thermal probing has become a major tool for studying transport phenomena at micro and nanoscale levels, detecting hot spots and failures of microelectronic devices or measuring surface temperature distribution at these scales. If contact point measurement of a local tip is expected to provide the best spatial resolution, the fundamental aspect of the interaction between the probe tip and the...
The development of a spectral-spatial calibration source suitable for a double Fourier modulating interferometer at infrared wavelengths, or more generally a thermal IR or spectral imager, is described. In particular a calibrator is being developed by alternating, on the emitting surface, materials of different emissivities. Its characterization and the rationale behind this choice is given, together...
This paper investigates the potential for using the freezing-points of high-purity metals for direct temperature calibration, on site and at low cost. These freezing-points are primary calibration points in the International Temperature Scale (ITS-90) [1]. It has been found that small amounts of high-purity metals can be obtained in the marketplace cheaply. Experiments were carried out by driving...
In this work, innovative jelly tissue-mimicking materials (TMM) have been characterized measuring their specific heat capacity in the temperature range of (10 and 80) °C. These new specimens have improved acoustic characteristics and are promising for improving the efficacy of oncological treatments based on high intensity focused ultrasounds (HIFU). For this reason, it appears very important to have...
A structure for power probe of W-band power meter is designed under the premise of ensuring absorption rate and steady working of materials at high temperature. Basing on heat analysis ANSYS code, the temperature distribution of the probe has been simulated with 0–50mW input power. The designed probe meets the requirements of calibration and measurement according to the simulation results for temperature...
The calibrated heat sensor is used for on chip heat sensing. We suggest an all digital on chip time based heat sensor for system on a chip (SoC) heat management. For on-chip purpose, the proposed temperature sensor achieves area-efficient and fast thermal monitoring by adopting a Digital Controlled Oscillator. The future heat sensor extinguishes the want for double position measurement compare to...
Body temperature is one of vital signs which can reflect physical status of an individual. Digital thermometers are adopted in clinical gradually in recent years. But few thermometers are really used in clinical because the measurement accuracy or measuring time. In the paper, we designed an improved digital thermometer which has both fast response and high precision. For excellent performance, 1)...
A novel on-chip frequency calibration of temperature dependency is proposed for CMOS reference frequency generator. High-order temperature coefficients are rapidly extracted by employing a carefully designed on-chip heater, so that the frequency deviation due to the temperature variation is accurately estimated, and compensated in digitally by means of all-digital PLL (ADPLL). The proposed technique...
In this paper we present the microcontroller system for diagnostic and evaluation of the Stirling engine performance. For this purpose the model for the prototype engine analysis has been developed, to present the engine's improved benchmarking results. The functioning of this engine has been analysed with the aim to find and optimize the main working parameters. To obtain this goal the Stirling engine...
A new type of a calorimetric measurement system concept for drives measurements based on open- and balance-type calorimeter is introduced and practically verified. The calorimetric concept with two parallel chambers is used to obtain the losses of the commercial frequency converter. The main advantage of this concept is the measurement rate of different operating points compared to the standard open-...
The heat cycles test set is designed and built in accordance with what is discussed in the article for high voltage cables testing [1, 2]. The test set feeds current periodically into the cable under testing. In on-cycle, the test set heats up the cable for at least 8 hours while in the off-cycle, it allows the cable to cool down for at least 16 hours until its conductor temperature is within 10 °C...
For the purpose of inclination measurement and monitoring, a tilt angle measurement system using a heat convection accelerometer is presented in this study. A conditioning circuit that center around the single chip processor is designed and built. Experiments were carried out to characterize the measuring system with the range of −90° to +90°. The output results show nonlinear relationship. The calibration...
There have been unprecedented temperature non-uniformities reported in conventional 2D- and emerging 3D-packaged multi-core microprocessors. Therefore, techniques for spatially resolving chip power and temperature profiles in fully operational chips are needed to improve circuit design and enable optimal cooling solutions. This paper presents a high-resolution, infrared (IR) thermography technique...
This paper presents a self-cleaning mass calibration procedure for a thermogravimetric (TC) device using molybdenum (Mo). A Mo thin-film is deposited by sputtering and patterned with known geometry on the device sample area using a standard lithography step thus giving accurate control of the mass of the sample under investigation. The device resonance frequency is measured while the temperature of...
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