Zbigniew Czaja
A new approach based on the 4D method is proposed to self-testing of analog networks (circuits) of mixed analog-digital microsystems controlled by microcontrollers. It is characterised by simplicity and facility of the implementation of diagnosis algorithms in simple and popular microcontrollers. In the paper the creation of a fault dictionary and self-testing procedures of analog networks (single soft fault detection and localisation) for these microsystems are described.
XVII IMEKO World Congress
· TC4
· 2003
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D. Crescini, M. Romani, D. Marioli, A. Taroni
Among the various sensor technologies, thick-film technology (TFT) on ceramic substrates offers several appreciable capabilities, e.g., flexibility in choice of material and design, high shock resistance, ease of integration into electronic circuits and packaging. In this application a thick-film tilt sensor has been developed based on heat transfer by natural convection. The device measures internal changes in heat transfer caused by the inclination using the force of gravity as an input. The device is functionally equivalent to traditional proof-mass accelerometer. The proof mass in the...
XVII IMEKO World Congress
· TC4
· 2003
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Leopoldo Angrisani, Luigi Battaglia
The main aim of the paper is to describe the most significant strategies, both hardware and software, adopted for the implementation of a new digital signal generator based on the TMS320C6701TM digital signal processor (DSP). The novelty of the generator essentially relies on its capability of dynamically updating the output signal, according to the selections the user can make through a suitable graphical interface, with no need of reloading the target application into the DSP. This feature along with the high portability, good flexibility, and, above all, low cost, make the proposed...
XVII IMEKO World Congress
· TC4
· 2003
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Cotsakis Stavros, Loumos Vassili, Kayafas Eleftherios
An important characteristic of e-learning environments is that the instructor should know whether a registered user is sufficiently attending the lessons. ELMVT is a tool that measures and calculates official or preset indicators of learners’ diligence and then graphically depicts them in the form of a polychromatic (multi-colored) tree. In this way, the instructor can quickly and accurately form a first impression of the trainee’s diligence, an element important in order to enhance the trainee’s guidance and to ameliorate the further co-operation between the trainee and the instructor.
XVII IMEKO World Congress
· TC4
· 2003
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Georgios S. Kouzas, Photis Stavropoulos, Ioannis Anagnostopoulos, Christos Anagnostopoulos, Vassili Loumos, Eleftherios Kayafas
This paper describes a system capable of measuring the type of pages in the wild WEB. The system uses as theoretical background the capture – recapture methodology, which is mainly used for statistical purposes in other scientific areas. The problem addressed may be compared to the context of capture – recapture experiments used in wildlife biological studies. The novelty in the proposed method stands in the fact that the experiment takes place in the wild WEB and instead of animal species, the measurements concern several types of WEB pages.
XVII IMEKO World Congress
· TC4
· 2003
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A. Mariscotti, A. Motta, P. Pozzobon
Measurements of the magnetic field emissions over [10 kHz, 30 MHz] frequency range of large power synchronous generators are reported; recorded spectra are correlated with the operating conditions of the machine under test. Comparison is made with other results obtained in a similar configuration.
XVII IMEKO World Congress
· TC4
· 2003
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A. Mariscotti, G. Armanino
The test and calibration setups are presented for the measurement low frequency conducted emissions of rolling stock and on-board static converters. The work is aimed to allow the laboratory or factory test of static converters without the need of long and expensive runs on a locomotive on a real line. The post processing needed for statistical evaluation of emissions is also presented.
XVII IMEKO World Congress
· TC4
· 2003
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Leopoldo Angrisani
The paper mainly concerns interference measurement in spread spectrum, wireless communication systems. A new digital signal-processing method is proposed, which proves non intrusive and independent of the specific system considered. Thanks to the nice properties of the wavelet packet transform, the method is capable of extracting the occurred interference from the spread spectrum signal, thus ensuring accurate interference magnitude and frequency estimates also in critical conditions: interference level much smaller than that characterizing the spread spectrum signal, and interference...
XVII IMEKO World Congress
· TC4
· 2003
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Y. S. Ku, C. M. Hsu, H. L. Pang, L. J. Hsiao, Masakazu Nakanishi
Electrical unit of resistance maintained at the Center for Measurement Standards (CMS, Republic of China) is based on the second plateau of quantized Hall resistance, RH(2). Resistors are directly or indirectly compared with the RH(2). We report the procedure of the dc and ac resistance measurements at the CMS. Uncertainties associated to the measurements are also briefly reported.
XVII IMEKO World Congress
· TC4
· 2003
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Ricardo Doldan, Alberto Yufera, Adoracion Rueda
In this paper, an incremental Analog-to-Digital Converter (ADC) designed as part of the signal-conditioning circuitry for tissue impedance measurement system is presented. Continuous-time design techniques has been used and a modified implementation of the conversion algorithm, with respect to its discrete-time counterpart, has been developed. To reduce the influence of the no-idealities, analog and digital corrections have been also implemented. A prototype in 0.8 µm CMOS technology has been fabricated and tested. Experimental results are reported.
XVII IMEKO World Congress
· TC4
· 2003
· Download