{"id":2558,"date":"2023-02-07T06:12:59","date_gmt":"2023-02-07T06:12:59","guid":{"rendered":"https:\/\/hsmagnet.com\/?page_id=2558"},"modified":"2023-02-07T06:12:59","modified_gmt":"2023-02-07T06:12:59","slug":"magnetsensor","status":"publish","type":"page","link":"https:\/\/hsmagnet.com\/de\/magnetic-applications\/magnetic-sensor\/","title":{"rendered":"Sensormagnet"},"content":{"rendered":"

Magnetic materials are widely used in sensors we call sensor magnet. Most position sensors use magnetic fields and magnetic sensing elements to locate and detect changes in the position of objects. Such sensors are widely used in many industries, especially in the automotive industry, where they are used more widely. Examples include active suspension, vehicle height position sensing, steering wheel and accelerator position sensing, throttle control, seat, and window positioning systems, door and body panel closing, and more.<\/p>\n

Rotary Position Sensors<\/h2>\n

Magnets are used extensively in rotary position sensors, which typically consist of a housing assembly and a rotor assembly. The magnets are usually fixed to the rotor assembly.<\/p>\n

\"Rotary\"Rotary<\/p>\n

Figure 1 is a rotary position sensor from Delphi, the permanent magnet(s) is attached to the rotating body of the sensor(rotor) while the sensing device (Hall or MR) is attached to the stationary body (stator). As the rotor moves, the magnet(s) must move accordingly. The Sensing device can read data such as the angle of rotor rotation through changes in the magnetic field.\"Rotary<\/p>\n

Linear Position Sensors<\/h2>\n

Magnets are used in linear position sensors, usually, the magnets are made into components called magnet carriers, the housing part contains the sensing device, and when the magnet carrier moves, the sensing device fixed to the housing will read the magnetic change and thus determine the change of position. It is also widely used in the automotive industry. For example, the modern automotive industry uses electronic clutch controllers.\"Linear<\/p>\n

The linear position sensor on the clutch is a bit more complicated, so let’s take a linear position sensor from CTS and explain roughly how the linear sensor works.<\/p>\n

Figure 2 shows a linear sensor of the CTS with a magnet carrier in the middle. The inside of the housing is a cavity and the outside of the magnet is a cylindrical fixing bracket. It is attached to a spring. When the object connected to the linkage is displaced, it pushes the magnet carrier fixed to the linkage to be displaced. This time the relative position of the magnet and the sensing device will change, so that the sensing device receives a change in the magnetic lines of force. In this way, the displacement of the object can be monitored and judged.<\/p>\n

Angular Position Sensors<\/h2>\n

The angular position sensor is relatively more complex. What we know is the angular sensor on the brushless DC motor, which monitors the Rotor’s rotation angle.<\/p>\n