mobile phones are the best interpretation of what it means to "although the sparrow is small, , , all the internal organs, ". The mobile phone looks like there is only one small, but many of the parts contained in it are very small parts, and in the end the mobile phone can realize a lot of functions. Let’s take a look at the sensors in the mobile phone.
1, temperature sensor
is used to monitor the temperature of the mobile phone battery and the CPU temperature. If the temperature abnormality will automatically shut down . The temperature sensor can also detect temperature changes in the outside air, even the user's current body temperature. The principle is to convert temperature into available output signals using the law of various physical properties of matter changes with temperature.
2, Hall sensor
Hall sensor is somewhat similar to magnetic field sensors. Hall sensors can convert the changing magnetic field into output voltage, thereby generating an potential difference across the conductor. Some mobile phones will come with some protective cases at random. When the protective case is closed, the phone will automatically lock the screen. After opening the protective case, the device will automatically unlock. In the flip phone, a Hall sensor will also be used.
3, acceleration sensor
electronic devices that can measure acceleration force. Acceleration force is the force that acts on the object during acceleration, just like the gravity of the earth, that is, gravity.
application: perceive the motion of the device, calculate the inclination angle, and analyze the movement method.
4, air pressure sensor
air pressure sensor: detect and measure the altitude, connect the film with the transformer or capacitor . When the air pressure changes, it will cause the resistance or capacitance value to change, thereby measuring the data of the air pressure.
Have you ever studied the sensors on your phone? Do you think the phone uses a lot of sensors?
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