Hall sensor comes from the research of American scientist Hall on the electrical conductivity of metals. Through Hall's research, it is found that conductors, semiconductors and conductive fluids can produce magnetoelectric effects. And through the research of the latecomers, it is found that the magnetoelectric effect produced by semiconductors is much stronger than that of conductors, so people begin to make various Hall elements by using Hall phenomenon for measurement, information processing and so on. Hall sensor is a new product developed by using Hall phenomenon. Next, let's talk about the application of Hall sensor in various aspects.
It is suitable for the measurement of various data.
Hall sensor is used in data measurement, which is the most widely used field. Hall sensor can be used to measure various physical quantities, such as linear velocity, acceleration, rotation speed, wind speed, flow and displacement of objects. When measuring these physical parameters of the object, we can add a semiconductor material to the surface of the object to be measured, and then use the Hall sensor to capture the magnetic field of the semiconductor material to measure the object in real time, so that we can get the parameters about the moving speed of the object through the Hall sensor.
In addition, the Hall sensor is also used to measure and control the current in the circuit. As we all know, when the circuit is energized, it will produce a magnetic field. The application of Hall sensor can accurately capture the change of the magnetic field in the circuit, so as to measure and control the current change in the circuit in real time. So many electric meters now contain Hall elements.
Used for automatic control.
In our daily life, there are many applications in automatic processing of objects by Hall effect and Hall sensor. Here are two most common examples.
When we enter some high-end places, such as star hotels, we will enter those automatic doors. These doors will automatically open when the human body approaches, which makes use of Hall effect and Hall sensor to some extent. The human body is a semiconductor with Hall effect. The designer installed a Hall sensor in the induction door. When the human body approaches, the Hall sensor will instantly capture the magnetic field effect and open a "convenient door" for people.
Another application is that Hall sensor is applied to some automatic alarm devices. In an emergency, such as a fire, the Hall sensor can detect the change of the magnetic field and give an alarm to warn people that something has happened.
Used for medical equipment.
Hall sensors are also widely used in medical equipment. Using Hall effect, we can accurately detect the health status of organs in human body and improve the accuracy of medical equipment.
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