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Date: 8-3-2021
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Sensors
Magnetic sensors detect a varying field in an airgap using a Hall effect or magnetoresistance probe which delivers a voltage depending on B. Magnetic position and speed sensors used in brushless motors and automobile system controls offer reliable noncontact sensing in a hostile environment involving dirt, vibration and high temperatures.
The point to emphasize here is that a permanent magnet usually forms part of the circuit; it provides a noiseless magnetic field with no expenditure of energy. For example, a variable reluctance sensor with a magnet and a Hall probe may be used to detect the rotation of a toothed wheel.
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تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
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أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
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المجمع العلمي ينظّم ندوة حوارية حول مفهوم العولمة الرقمية في بابل
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