A magnetic sensor (magnetic sensor) is a device designed to detect and measure magnetic fields. It utilizes the effects of magnetic fields on physical properties to determine the presence, strength, and direction of magnetic fields. Magnetic sensors are widely used in a variety of different applications, including industrial automation, automotive industry, aerospace, medical devices, consumer electronics, and more.
Magnetic sensors can be categorized into several different types of operating principles. One of the most common is the Hall effect sensor. Hall effect sensors are based on the Hall effect, which means that when an electric current passes through a conductor, a lateral magnetic field is created, which results in a voltage difference. By measuring this voltage difference, the strength and direction of the magnetic field can be determined.
Another common type of magnetically sensitive sensor is the magnetoresistive sensor, also known as a magnetoresistive sensor. Magnetoresistive sensors utilize the effect of a magnetic field on electrical resistance to measure the magnetic field. When a magnetic field is applied to a magnetoresistive element, the value of the resistance changes, and by measuring this change the strength and direction of the magnetic field can be determined.
There are also a number of other types of magnetic sensors, such as magnetic induction sensors and magnetometers. These sensors use different principles to measure magnetic fields, but their basic purpose is the same.
Magnetic sensors have a wide range of applications. In industry, they are commonly used to detect and measure the position, speed, and direction of rotating objects, such as speed sensors for automobile engines. In the automotive industry, magnetic sensors are also used to detect parameters such as vehicle speed and steering wheel angle in vehicles. In medical equipment, magnetic sensors can be used to detect magnetic fields inside the human body, such as the detection of the heart's magnetic field.
In short, magnetic sensors are devices that are used to detect and measure magnetic fields, utilizing the effect of the magnetic field on physical properties to determine the presence, strength and direction of the magnetic field. They have a wide range of applications in a variety of different fields, providing us with convenient and accurate measurements of magnetic fields.