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- Hall-Effect Sensors Theory and Applications by Edward Ramsden
- Hall Effect Sensing and Application
- The Hall Effect – Sensor Applications
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Hall-Effect Sensors Theory and Applications by Edward Ramsden
A Hall-effect sensor or simply Hall sensor is a device to measure the magnitude of a magnetic field. Its output voltage is directly proportional to the magnetic field strength through it. The sensor type is named after the American physicist Edwin Hall. Hall-effect sensors are used for proximity sensing , positioning , speed detection , and current sensing applications. Frequently, a Hall sensor is combined with threshold detection, so that it acts as and is called a switch. Commonly seen in industrial applications such as the pictured pneumatic cylinder , they are also used in consumer equipment; for example, some computer printers use them to detect missing paper and open covers.
The Hall-effect principle is named for physicist Edwin Hall. In he discovered that when a conductor or semiconductor with current flowing in one direction was introduced perpendicular to a magnetic field a voltage could be measured at right angles to the current path. The common analogy popular at the time of Hall's discovery was of electric current in a wire to a flowing liquid in a pipe. Hall's theory equated the magnetic force on the current resulting in a crowding to one side of the "pipe" or wire. Electromagnetic field theory has allowed a more refined interpretation of the physics responsible for the Hall effect. It is well established that the Hall-effect results from the interaction of charged particles, like electrons, in response to electric and magnetic fields. And also on Wikipedia.
Download PDF Version. This note provides a basic understanding of the Hall effect and how Allegro designs and implements Hall technology in packaged semiconductor monolithic integrated circuits. When an electron moves along a direction, v, perpendicular to the applied magnetic field, B, it experiences a force, F, the Lorentz force, that is normal to both the applied field and the current flow. The Hall effect and the Lorentz force. The blue arrows, B, represent a magnetic field passing perpendicularly through the conductive plate. In response to this force, the electrons move in a curved path along the conductor and a net charge, and therefore a voltage, develops across the plate.
Hall Effect Sensing and Application
Hall voltage is discovered by Edwin Hall in Hall Effect is caused due to the nature of current in a conductor. Many inventions used this Hall Effect theory. Hall-effect sensors are the linear transducers that are used to measure the magnitude of the magnetic field. Working on the principle of Hall Effect, these sensors generate a Hall voltage when a magnetic field is detected, which is used to measure the magnetic flux density.
Chapter 1 hall Effect Sensing Introduction.. Why use the hall Effect.. Using this 2. Chapter 2 hall Effect Sensors Introduction.. Theory of the hall Effect.. Basic hall Effect sensors..
The Hall Effect – Sensor Applications
By Edward Ramsden. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. You may also complete your request online via the Elsevier homepage www. Recognizing the importance of preserving what has been written, Elsevier prints its books on acid-free paper whenever possible. Among the various sensing technologies used to detect magnetic fields, the Hall effect is perhaps the most widespread and commonly used.
Hall Effect Sensors. Vane Sensors. Consult us about our Best Price Guarantee! The use of a Hall Effect sensor is key in measuring the magnetic field of an object, as well as understanding how it all works in the first place.
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