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Figure 1: a wheel containing two magnets passing by a Hall effect sensor. The voltage from the sensor peaks twice for each revolution. This arrangement is used to measure and regulate the speed of rotating objects, including disk drives.
Engine coolant temperature sensor; Hall effect sensor; Wheel speed sensor; Airbag sensors; ... Speed sensors are machines used to detect the speed of an object ...
Hall effect measurement setup for electrons. Initially, the electrons follow the curved arrow, due to the magnetic force. At some distance from the current-introducing contacts, electrons pile up on the left side and deplete from the right side, which creates an electric field ξ y in the direction of the assigned V H .
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 closed-loop Hall-effect ...
This correction enables a larger maximum permissible air gap at the speed sensor. On a module m = 1 target wheel these new sensors can tolerate an air gap of 1.4 mm, which is wider than that for conventional speed sensors on module m = 2 target wheels. On a module m = 2 target wheel the new speed sensors can tolerate gap of as much as 2.2 mm.
Speed sensing devices, termed variously "wheel impulse generators" (WIG), pulse generators, speed probes, or tachometers are used extensively in rail vehicles. Common types include opto-isolator slotted disk sensors [5] and Hall effect sensors. Hall effect sensors typically use a rotating target attached to a wheel, gearbox or motor.
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A motor used in an electric bicycle application requires high initial torque and therefore uses Hall effect sensors for speed measurement. Electric bicycle controllers generally use brake application sensors and pedal rotation sensors, and provide potentiometer-adjustable motor speed, closed-loop speed control for precise speed regulation ...
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