Hall sensor, the English name is Hall sensor, is a kind of magnetic field sensor based on Hall effect. It is mainly used for force measurement. It has many characteristics such as high precision and good linearity. It is now in industrial automation technology, detection technology, Information processing and other aspects have a wide range of applications.
Hall sensors can be divided into line type and switch type. Linear Hall sensors can be divided into open-loop linear Hall sensors and closed-loop linear Hall sensors (also known as zero-flux Hall sensors), which mainly include Hall elements, linear amplifiers and design followers. Used to measure AC current, DC current, and voltage. The switching Hall sensor mainly consists of a Hall element, a differential amplifier, a voltage regulator, a Schmitt trigger, and an output stage for digital output.
one. Hall sensor circuit diagram Daquan (Hall sensor signal amplifier circuit)
The counter circuit diagram of the HK-1 Hall proximity switch uses optocoupler isolation and an 8-bit calculator. Whenever the magnet is close to the HK-1 switch, the calculator counts a number and accumulates to complete the counting function.
three. Hall sensor circuit diagram Daquan (Hall proximity switch for CNC machine tool PLC circuit)This circuit can also be used on the CNC machine tool programmable controller (PLC), its precision can reach 0.02mm, can also be used for high-speed punching, complex cutting mold feeding and cutting, stroke control and so on.
Magnetic balance Hall electric voltage sensor works
The primary side voltage Vp is converted into the primary side current Ip by the primary side resistor R1, and the magnetic flux generated by Ip and the secondary side current Is generated by the amplification of the Hall voltage are balanced by the magnetic flux generated by the secondary side coil. The secondary current Is accurately reflects the primary voltage.
Magnetic balance Hall current sensor works:
The magnetic flux generated by the primary current Ip and the secondary current Is generated by the amplification of the Hall voltage are balanced by the magnetic flux generated by the secondary coil. The secondary current Is accurately reflects the primary current. :
Direct inspection type Hall current sensor working principle
As shown. Since the magnetic circuit has a good linear relationship with the output of the Hall device, the voltage signal U0 outputted by the Hall device can indirectly reflect the magnitude of the measured current I1, namely: I1âˆB1âˆU0; U0 is marked as being When the current I1 is rated, U0 is equal to 50mV or 100mV. This makes Hall direct detection (no amplification) current sensor
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