Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
436 6 |
Ultima descărcare din IBN: 2023-05-19 10:56 |
Căutarea după subiecte similare conform CZU |
537.8.029+621.3.08 (1) |
Electromagnetism. Electromagnetic field. Electrodynamics (60) |
Electrical engineering (1153) |
SM ISO690:2012 PENIN, Alexander A., SIDORENKO, Anatolie. Normalized parameters of a magnetoresistive sensor in bridge circuits. In: Moldavian Journal of the Physical Sciences, 2021, nr. 1(20), pp. 94-104. ISSN 1810-648X. DOI: https://doi.org/10.53081/mjps.2021.20-1.08 |
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Moldavian Journal of the Physical Sciences | ||||||
Numărul 1(20) / 2021 / ISSN 1810-648X /ISSNe 2537-6365 | ||||||
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DOI:https://doi.org/10.53081/mjps.2021.20-1.08 | ||||||
CZU: 537.8.029+621.3.08 | ||||||
Pag. 94-104 | ||||||
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Rezumat | ||||||
Magnetoresistive sensors are considered as part of bridge circuits for measuring magnetic field strength and electric current value. Normalized or relative expressions are introduced to change the resistance of the sensor and the measured bridge voltage to increase the information content of the regime to provide the possibility of comparing the regimes of different sensors. To justify these expressions, a geometric interpretation of the bridge regimes, which leads to hyperbolic straight line geometry and a cross ratio of four points, is given. Upon a change in the sensor resistance, the bridge regime is quantified by the value of the cross ratio of four samples (three characteristic values and the current or real value) of voltage and resistance. The cross ratio, as a dimensionless value, is taken as a normalized expression for the bridge voltage and sensor resistance. Moreover, the cross ratio value is an invariant for voltage and resistance. The proposed approach considers linear and nonlinear dependences of measured voltage on sensor resistance from general positions. |
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Cuvinte-cheie magnetoresistive sensors, bridge circuit, projective transformation, cross ratio, senzori magnetorezistivi, circuit de punte, transformare proiectivă, raport complex |
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