What sensors are there in the mobile phone? In life, many of our electronic devices have sensors, which are very common in mobile phones. A sensor is a detection device, which can sense the measured information and transmit the sensed information. So what sensors are there in the phone?
What are the sensor 1 1 and the ambient light sensor in the mobile phone?
Optical sensors are similar to the eyes of mobile phones. The mobile phone can sense the intensity of ambient light to adjust the brightness of the mobile phone screen. Using light sensors to help adjust the screen brightness can further extend the battery life. The optical sensor can also be used with other sensors to detect whether the mobile phone is put in the pocket to prevent accidental touch.
2. Proximity sensor
The infrared ray emitted by the infrared LED lamp is reflected by the object and then received by the infrared detector, so as to judge the intensity of the received infrared ray and the distance. The effective distance is about 10 meter. It can sense whether the phone is attached to the ear to make a call, and if it is, it will turn off the screen to save electricity.
3. Gravity sensor (gravity sensor)
Through the piezoelectric effect, it can be used to switch the direction of horizontal screen and vertical screen. When used in racing games, it can use the data in the game to rotate the driving direction through horizontal induction.
4. Acceleration sensor
The principle of action is the same as that of gravity sensor, but the acceleration direction is determined by three dimensions, with low power consumption but low accuracy. Used in mobile phones, it can be used to count steps and judge the direction of mobile phones.
5. Magnetic sensor
Measuring the change of resistance to determine the magnetic field strength requires shaking the mobile phone to accurately judge, which is mostly used for compass and map navigation.
6. Gyroscope
Gyroscope can measure angular velocity along one axis or several axes, which is an ideal technology to supplement MEMS accelerometer. Combine accelerometer and gyroscope.
It can provide more realistic user experience, accurate navigation system and other functions for end users. The "shake" function in the mobile phone (for example, shake the mobile phone to draw lots ...), somatosensory technology, and the adjustment and detection of VR viewing angle are all applied to the gyroscope.
7、GPS
There are 24 GPS satellites in a specific orbit above the earth. Starting from the instantaneous position of the satellite, the GPS module in the mobile phone calculates the distance between the mobile phone and the satellite through the time stamp of the satellite transmitting coordinates and the time difference when receiving. It can be used for positioning, speed measurement, ranging and navigation.
8. barometer
When the diaphragm is connected with a sensor or a capacitor, when the air pressure changes, the value of the resistor or the capacitor will change, thus measuring the air pressure data. GPS can also be used to measure altitude, but there will be an error of about 10 meter. If equipped with air pressure sensor, the error can be corrected to about 10 meter.
What sensors are there in the mobile phone? 2 1, acceleration sensor (gravity sensing)
Acceleration sensor, as its name implies, is an electronic device that can measure acceleration. Using piezoelectric effect, the gravity sensing module consists of "gravity block" and piezoelectric crystal. When the mobile phone moves, the gravity block will receive the same acceleration as the mobile phone, so the force exerted by the gravity block on the piezoelectric crystal in different directions will also change, and the output voltage signal will also change.
According to the output voltage signal, the direction of the mobile phone can be judged. This kind of gravity sensing device is often used to automatically rotate the screen and some games. We can complete the turning action of racing game by shaking the mobile phone, mainly by gravity sensing device.
2. Distance sensor
The distance sensor is used to measure the distance. The distance sensor will emit infrared light, and the object can reflect infrared light, so when the object approaches, the infrared light reflected by the object will be monitored by the component, and then the distance of the object approaching can be judged.
When we pick up the phone to answer the phone, the phone will have a black screen, which can prevent our misoperation. The realization of this function depends on the distance sensor.
3. Light sensitive element
This sensor is probably the one we are most familiar with. It is the sensor that controls the brightness of our screen. In the sun, the light sensor will brighten the brightness of our mobile phone, so that we can clearly see the words on the screen of the mobile phone in any environment.
The optical sensor consists of an optical transmitter and an optical receiver. The projector focuses the light, transmits it to the optical receiver, and finally receives it through the sensor and turns it into an electrical signal.
4, gyroscope
Gyroscope is a kind of equipment used to measure angle and keep direction, and its principle is based on the principle of conservation of angular momentum. The specific principle is very troublesome to explain, so I won't go into details here. If you want to know your friends, you can go to Baidu. It's easy to find.
Gyroscope is mainly a shake of the mobile phone, or in some games, you can change the angle of view by moving the mobile phone, VR. Moreover, when we enter the tunnel, the satellite positioning system is likely to have no signal, and navigation can still work at this time. This function is also realized by gyroscope.
5. Magnetic field sensor
The magnetic field sensor is a kind of sensor that can measure the geomagnetic field. It is composed of anisotropic magnetoresistance materials. When these materials feel the change of weak magnetic field, their own resistance will change, and the output voltage will also change, so that the orientation of geomagnetic field can be judged.
Magnetic field sensors are mainly used in mobile phone compasses and auxiliary navigation systems. Before use, the mobile phone needs to rotate or shake several times to accurately indicate the magnetic field direction.
6. Air pressure sensor
The air pressure sensor is mainly used to detect the atmospheric pressure, and the height can be judged by detecting the atmosphere. Mainly used for auxiliary navigation and positioning system, displaying floor height. Although there was no such sensor on previous mobile phones, there are basically such sensors on mobile phones on the market now.
What are the sensor 3 1 and accelerometer in the mobile phone?
The accelerometer records the movement of the equipment along three axes of the coordinate system, the X axis measures the movement of the equipment from side to side, the Y axis measures the movement along the top and bottom (including gravity), and the Z axis measures the forward and backward movement.
It calculates your acceleration by measuring the data obtained by the movement of the equipment, and then the application detects the direction and speed. For example, a fitness application can measure the direction and speed of your jogging in the morning.
2. Gyroscope:
Gyroscope measures the rotation along three axes of the device coordinate system, and it detects the accurate measurement of the rotation of the mobile phone in radian per second.
Simply put, accelerometers measure linear motion and gyroscopes measure angular motion. The combination of the two can realize automatic rotation and other functions, and they are used in action-sensitive games, such as Temple Escape or Tar 9.
3. Magnetometer:
The magnetometer senses the direction of your mobile phone according to the earth's magnetic field. This sensor is very important for navigation and compass applications, because it can help your mobile phone identify the direction and adjust the map accordingly.
4. Global Positioning System:
Like a magnetometer, the Global Positioning System (GPS) is a sensor with an antenna to help navigation. It receives continuous signals from satellites and helps to calculate the distance traveled and the location of mobile phones.
When a signal is received, the GPS sensor will record a position and calculate the distance according to the time difference between any two signals. Navigation applications use GPS and magnetometers to identify position and direction.
5. Ambient light sensor:
The ambient light sensor measures the light intensity around the device. These sensors detect the brightness change of the surrounding environment and record its intensity.
If the automatic brightness function is enabled, the data from the ambient light sensor helps to adjust the screen brightness according to the indoor light. Auto brightness is a convenient function, but you can also disable it if you want to change the screen brightness manually.
6. Proximity sensor:
The proximity sensor detects the distance between the object and the mobile phone. For a simple example, when you answer the phone, the display of the mobile phone will automatically turn off, which helps to save battery power and avoid accidentally clicking to hang up during the call.
In this example, the proximity sensor works by measuring the distance between the screen and the ear. When the distance is equal to the set value, it will turn off the display screen before your ears touch the screen.