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Both of these alloys have <100> easy axes for magnetostriction and demonstrate sufficient ductility for sensor and actuator applications. [6] Schematic of a whisker flow sensor developed using thin-sheet magnetostrictive alloys. Another very common magnetostrictive composite is the amorphous alloy Fe 81 Si 3.5 B 13.5 C 2 with its trade name ...
Magnetostrictive position sensors use the Wiedemann effect to excite an ultrasonic pulse. Typically a small magnet is used to mark a position along a magnetostrictive wire. The magnetic field from a short current pulse in the wire combined with that from the position magnet excites the ultrasonic pulse.
The principle behind magnetic, mechanical, cable, and other float level sensors often involves the opening or closing of a mechanical switch, either through direct contact with the switch, or magnetic operation of a reed. In other instances, such as magnetostrictive sensors, continuous monitoring is possible using a float principle.
where is the magnetostrictive expansion at saturation, and is the angle between the saturation magnetization and the stress's direction. When λ s {\displaystyle \lambda _{s}} and σ {\displaystyle \sigma } are both positive (like in iron under tension), the energy is minimum for θ {\displaystyle \theta } = 0, i.e. when tension is aligned with ...
The principle of magnetic actuation is based on the Lorentz Force Equation. F → m a g = q v → × B {\displaystyle {\vec {F}}_{mag}=q{\vec {v}}\times B} When a current-carrying conductor is placed in a static magnetic field, the field produced around the conductor interacts with the static field to produce a force.
Fluxgate technology principle. Fluxgate sensors or saturable inductor current sensors work on the same measurement principle as Hall-effect-based current sensors: the magnetic field created by the primary current to be measured is detected by a specific sensing element. The design of the saturable inductor current sensor is similar to that of a ...
Easier for sensor deployment. Using piezoelectric transducer, the wave propagation angle in the test part is affected by Snell's law. As a result, a small variation in sensor deployment may cause a significant change in the refracted angle. Easier to generate SH-type waves.
A magnetic level gauge pulled out from inside the valve housing on top of a railway tank car in the United States [1]. A magnetic level gauge is a level gauge based on a float device that can experience floatation in both high and low density fluids.