منابع مشابه
A Microcontroller Based Digital Vector Impedance Meter With Sampling Reduction
Abstract This paper proposed the microcontroller based vector impedance meter, which can be used to measure unidentified impedance of the system. The microcontroller read only four samples from two voltage signals, the first voltage is proportional to the voltage across the impedance while the second voltage is proportional to the current passing through it. A novel algorithm is then used to ge...
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In this work we present a new hybrid imaging technique that combines electrical impedance tomography (EIT) with acoustic tomography. The novel technique makes use of the fact that the absorbed electrical energy inside the body raises its temperature, thus leading to expansion effects. The expansion then induces an acoustic wave which can be recorded outside the body and consequently be used to ...
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In this paper we describe a system which we have developed to measure cat ear canal specific acoustic impedance Zsp, magnitude and phase, as a function of frequency, for frequencies between 200 Hz and 33 kHz, and impedance magnitude between 4.0 to 4.0×105 [Rayles] (MKS). The object to be measured is placed at the end of a 3.5 mm diameter sound delivery tube. After a simple calibration procedure...
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Ever since the middle of the last centurywhen Sir Charles Wheatstone first put to practical use a curious electrical balancing network which had been devised a decade before by a fellow Englishman named Christie, the bridge circuit has been accepted a s avaluable and powerful tool in the field of electrical measurement. Even though today bridges, like almost everything else, have become increas...
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ژورنال
عنوان ژورنال: IEEE Transactions on Instrumentation and Measurement
سال: 2014
ISSN: 0018-9456,1557-9662
DOI: 10.1109/tim.2014.2327474