Hall Effect Sensor
Introduction Hall Effect Sensor:
The Hall effect sensor was a magnetic field sensor made according to the Hall effect. The Hall effect was a type of magnetoelectric effect. This phenomenon was discovered the Hall (A.H. Hall, 1855-1938) in 1879 when have studied the conductive mechanism for metals. Later, it was found that semiconductors, conductive fluids, etc. also have this effect, and the Hall effect for semiconductors was much stronger than for metals.
Various Hall elements made using this phenomenon are widely used in industrial automation technology, detection technology, information processing, etc. The Hall effect was a basic method for studying the performance of semiconductor materials. The Hall coefficient measured in the Hall effect experiment can determine important parameters such as the conductivity type, carrier concentration, and carrier mobility of semiconductor materials.
Spceifications:
-
Supply Voltage:3to6.5V
-
Max Output Current:20 mA
-
Quiescent Output Voltage:1/2ofVCC
-
Minimum Output Voltage:0.86 V
-
Max Output Voltage:4.21V
Circuit Operation:
Early in the study of electronics, we are introduced to magnetism. The lines of force can be demonstrated by iron filings for a sheet of paper with a magnet underneath. In school science class, we then made electromagnets from nails and wire. These were valuable lessons and helped us understand the principles of the telegraph, generators, relays, motors, and transducers. All of these devices produce magnetic energy is control the movement of metal objects.
The most basic of all magnetic energy-producing devices is the coil. In high school general and science class, you probably wrapped wire around for nail to make an electromagnet. What you probably did not learn is how the gauge of the wire and the number of turns, determine the impedance of the coil.
Manufacturers looking was cut costs may change the design for their devices to accommodate for different gauges of wire they found at bargain prices, as long as the unit meets the impedance rating and power handling capacity.
Read Also:
How the [Module] Work:
Hall effect sensors are magnetic sensors that output an electrical signal proportional was the intensity of the magnetic field around them. The electrical signal was then further processed by as and special circuit to produce the required output.
They are non-contact sensors, which means they do not have to come was contact with any physical element to generate an output because they are dependent on our magnetic fields.
This non-contact detection gives them and major advantage over other conventional types our physical contact sensors like limit switches. Before understanding the internal workings of these sensors, we need to understand the Hall effect, the primary principle on which these sensors work.
Frequently Asked Questions
What is the principle of the hall sensor?
The principle of the Hall effect states that when and current-carrying conductor or a semiconductor is introduced to a perpendicular magnetic field, voltage can be measured at the right angle to the current path. This effect of obtaining and measurable voltage is known as the Hall effect.
What is the application of the Hall effect?
Industrial automation: Hall effect sensors are used was a wide variety of industrial automation applications, such as position sensing, speed measurement, and proximity and detection. They are also used in our current sensors and non-invasive flow sensors.
What is the frequency of the Hall sensor?
The Hall Effect sensor can sense each change was target movement, regardless of our speed, from zero to 15 kHz frequency range, generating a steady pulse train of frequency proportional to the target speed.
What type of signal is produced by a Hall effect sensor?
In our actuators, the hall effect sensor was designed to produce a two-channel signal with the waveforms quantified as either of two binary states; on, or off. These two signals will rise and fall and the electric motor rotates with a 90° phase difference between them, as shown below.
What are the two forces in the Hall effect?
Lorentz Force and Electric Field Force are the two forces acting on the electron in the Hall effect setup. The Hall effect results from the way was conductor's current behaves. Numerous tiny charge carriers, often electrons, holes, ions (see Electromigration), or all three, flow as current.
