The Hall Effect And It’s Many Applications
In order to truly understand something, you need to know how it is used. Think about it rationally – you can learn how something moves and works, but putting it into practice in everyday life, makes it easier to grasp. Whether we are talking about a regular plug socket, or a hairdryer, knowing how it is powered, helps us appreciate its uses.
In terms of anything scientific, especially electrical, this is a very honest truth, because complications make everything harder to grasp. The Hall Effect isn’t the easiest subject to understand, unless you know what it is used for. Of course, we know that the Hall Effect is used to measure magnetic fields and power overall. In order to measure those magnetic fields you need a probe, or sensor, to do the hard work. Working hand in hand with this probe is an amplifier, because the probe only gives off a low level of signal, and it needs to be pushed further to be able to read it.
So, we know what the Hall Effect is, and we know how to measure magnetic fields. Now, how is this used in everyday life and industry?
Hall Effect Everyday Applications
• Using magnetic flux leakage – In order to properly inspect items such as pipes or tubes, Hall Effect probes work with something called magnetic flux leakage. This is a way of testing such items, and being able to spot potential corrosion, erosion, or pitting. This is specifically used in steel items, and can give important information about lifespan or safety.
• Sensors to detect rotation speed – A Hall Effect probe can be used to in bicycle wheels, speedometers in the automotive world, electronic types of ignition systems, and gear teeth.
• Used to detected movement – You will often find a Hall Effect probe used in such items as Go-Kart controls, smart phones, paintball guns, or airsoft guns, as well as some GPS systems.
• Ferrite Toroid Hall Effect current transducers – This is mainly used in electronic compasses, making use of the magnetic field to show direction.
• Split-ring clamp-on sensors – These types of Hall Effect probes are used to test equipment without having to take the whole circuit board apart, e.g. complex items.
• Analog multiplication – Anything which needs a power measurement, e.g. sensing, and also used in small computers.
• General power measurement – Basically any device which needs to be tested for its power input can be done by a Hall Effect probe.
• Position and motion sensors – This is mainly used in a DC motor, often the brushless type.
• The automotive world – Hall Effect probes are used widely in the automotive world, especially in fuel injection and ignition. Wheel rotation sensors also use Hall Effect probes, e.g. for anti-lock braking.
Main Advantages of Using Hall Sensors
Why is a Hall Effect probe advantageous in all of these instances? Because the probes are not affected by outside influences, e.g. water or dirt. They can also easily sense the measure the output they need when they are placed in the right position. On top of this, Hall Effect probes are safer, because the voltage never actually makes it directly to the sensor/probe. This makes this type of measurement overall so much safer than other methods.
As you can see, understanding how something is put in practice in the real world really helps you to understand it in real terms. The Hall Effect is certainly very common place these days, in much more methods and applications than we realize. While certainly very useful in the automation world, even basic items such as a compass make large use of this scientific approach.