The reason why smartphones are welcomed by us is that they are inseparable from the entertainment functions they have, making it more than just a conversation. Smartphones support so much entertainment, in the final analysis, the various sensors integrated in it, mainly gravity sensors, accelerometers, gyroscopes, electronic compasses and light interval sensors. Let's take a look at their respective uses.

Gravity sensor

  The gravity sensor is an early mobile phone sensor. Today, most mainstream smartphones are equipped with this equipment. In iOS and Android platforms, many games use gravity sensors, such as the Need for Speed series, the modern war series, etc., which bring users a fresh experience. What is gravity sensing skills? In short, it is based on the piezoelectric effect. After measuring the internal gravity of a weight, the values of the two directions are orthogonal, so that the horizontal direction is distinguished. In general, the base of gravity sensing in the mobile phone system is placed horizontally. However, in use, it is difficult for the user to make the mobile phone adhere to the horizontal posture forever in the entertainment. Therefore, the user can also select and set the base under the grip condition. However, if the mobile phone only has a gravity sensor installed, it can only sense a skew of 90 degrees. If a three-axis acceleration sensor is added, it will expand to 360 degrees. Next, let's talk about the next three-axis accelerometer.

Triaxial acceleration sensor

  It is another very important sensor in mobile phones that can calculate the skewness of the phone relative to the horizontal plane based on the acceleration generated by gravity. So sometimes we mix it with the gravity sensor. Let's talk about the difference between them. At the top of the list, MEMS triaxial accelerometers sense the content of gravity, the static posture of the phone, and the direction of motion. Second, the screen of the mobile phone equipped with the accelerometer will be rotated intelligently with the viewpoint. The yangko function in the mobile phone and the shaking in WeChat are all completed using it. In addition, it is often used in games, and the drift trigger in the car is here.

Electronic compass

  The electronic compass can be used to sense the position, which is useful when there is no GPS signal or the network is not in good condition. It is determined by the Earth's magnetic field. Under urgent circumstances, it can be used as a compass to sense the direction of the southeast and northwest.

Three-axis gyroscope

  The first to install the gyroscope is the red iPhone 4, which brings surprises to the user. At the earliest, gyroscopes were mostly used in helicopters to maintain the attitude of the aircraft and the block size was relatively large. With the MEMS skills, it has become much smaller and can be integrated into the phone, and the price is much lower. It uses the principle of conservation of angular momentum to distinguish the relative position, orientation, viewpoint and level of an object in space. After the gyroscope is activated, the demand continues to rotate the body to operate, which also gives the user a real feeling. The famous game Modern Warfare 3 is based on gyroscopes for aiming and shooting. The brothers who like to play must not be unfamiliar. Who knows who to play.

Light interval sensor

  Finally, let's talk about the light interval sensor. It is done using a light sensor that recognizes the intensity of the outside light and actively adjusts the brightness of the screen. The interval sensor, also called the displacement sensor, performs the operation by changing the interval between the sensor and the user. Generally, it is located near the earpiece. When we answer or make a call, the interval sensor measures the interval between the ear and the earpiece, so that the screen appears active and open, and saves battery power.

  After watching many users' questions about mobile phone sensors, I decided to write this article and hope to let us know more about mobile phone sensors. It is precisely because of their existence that we have more and more perfect interaction with mobile phones, and the communication is more convenient.