Hall sensors are a magnetic field sensor based on Hall effect.The Hall effect is a type of magnetic appliance effect. This phenomenon was discovered by Hall (1855-1938) in 1879 when studying metal conductive agencies.Later, it was found that the semiconductor and the conductive current also had this effect, and the Hall effect of the semiconductor was much stronger than the metal. The various Hall components made by this phenomenon were widely used in industrial automation technology, detection technology and information processing.aspect.
Hall sensor principle
The Hall sensor is a sensor element made of Hall effect. It can detect the magnetic field and its changes with it, and can be used in various occasions related to magnetic fields.The semiconductor thin slice is placed in a magnetic field with a magnetic induction strength of B. The direction of the magnetic field is perpendicular to the thin piece. When the current I flow through the thin piece, the electromotive VH is generated at the direction of the current and the magnetic field. This phenomenon is called the Hall effect.The size of Hall voltage determines the speed of the electrons in the load, which is different from the void material.When the electronic concentration in the material is n, there is the following relationship: I = -NEVBD, UH = -1/Ned*IB = KH*IB, KH is Hall sensitivity.The size of the Hall voltage generated during the magnetic induction strength of the unit.
What is Hall sensor
Hall sensors are a magnetic field sensor based on Hall effect.The Hall coefficient measured by Hall effect experiment can judge important parameters such as conductive type, load concentration, and load migration rate of semiconductor materials.
What is the use of Hall sensors
The two permanent magnets of the folding position are relative to the same polarity, and the linear Hall sensor is placed in the middle. The magnetic induction strength is zero. This point can be used as zero point of displacement.During displacement, the sensor has a voltage output, and the voltage size is proportional to the displacement size.If the folding force is measured, if the tensile force, pressure and other parameters are changed, the size of the tensile and pressure can be measured, and the force sensor that can be made according to this principle can be measured.The folding angle speed measures a magnetic steel on the edge of the disk of non -magnetic materials. The Hall sensor is placed near the edge of the disc, and the CD -ROM rotates for a week.Cooling), the speed can be measured if the frequency meter is connected.The folding line speed measurement If the switch -type Hall sensor is arranged regularly on the orbit according to the scheduled position, the permanent magnet on the sports vehicle passes through it, and the pulse signal can be measured from the measurement circuit.The speed of the vehicle can be measured according to the distribution of the pulse signal.

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