The role of gyroscope _ the role of gyroscope in the phone _ the role of gyroscope in the game
Now, when we turn on the security test hardware of the rabbit, we often find that there is something called a gyro sensor in the sensor column. This thing is mainly used to detect the posture of the mobile phone on the mobile phone. We can't play it with the somatosensory game. Some anti-shake when the mobile phone is photographed should also be used.
However, the origin of this seemingly popular thing is actually very tall. What is it? Let's take a look.
1. The mobile phone gyroscope has moving parts
2. Silicon gyros will allow a subtle mechanical structure to be driven by electrostatic forces.
3. After the vibration, if the rotation occurs, the displacement will occur due to the Coriolis force in the orthogonal direction, resulting in a change in capacitance. This displacement is proportional to the angular velocity of the rotation.
4. Detect this change in capacitance and convert it into a digital signal. After dsp, it can be processed by ap.
What is the use of mobile phone gyroscopes?Now the gyro sensor in the phone has evolved into a small chip, but when the gyroscope appears, it is indeed a mechanical device.
At present, it is widely believed that in 1850, the French physicist J. Foucault invented the gyroscope in order to study the earth's rotation. The gyroscope of that era can be understood as placing a high-speed rotating gyro on a gimbal, so that because the gyro remains stable at high speeds, one can identify the direction through the direction of the gyro, determine the attitude, and calculate the angular velocity.
The universal bracket can guarantee that the gyro will not fall anyway, and the universal bracket can be traced back to the incense burner thousands of years ago in China. Is this guy
After the invention of the gyroscope, it was first used in navigation (the aircraft was not invented in the same year) and was later used in aviation. Because the plane flies in the air, it can't identify the direction with the naked eye like the ground, and the direction of the flight can't see the danger is extremely high, so the gyroscope is quickly applied and becomes the core of the flight instrument.
In the Second World War, all countries were fighting to create new weapons, and the Germans engaged in missiles to bomb the United Kingdom. This is the prototype of today's missiles. From Germany to the United Kingdom, how can thousands of miles fly so that the missile can fly, but also to the target?
Thus, the Germans came up with an inertial guidance system. The inertial guidance system uses the gyroscope to determine the direction and angular velocity, the accelerometer to test the acceleration, and then through mathematical calculations, you can calculate the distance and route of the missile flight, and then control the flight attitude, and strive to let the missile fall to where you want to go. During the Second World War, the computer was good, the instrument was good, and the precision was not enough. So the German missiles were very different. I wanted to blow up London. The result was that the bombs were everywhere, which made the British panic for a while.
However, since then, the inertial guidance system with the gyroscope as the core has been widely used in aerospace. Today, there are still such things in the missile, and with the stimulation of demand, the gyroscope is constantly evolving.
Gyro evolution
The earliest gyroscopes were mechanical, and there were really high-speed spinning gyros inside. The mechanical things had high requirements on machining accuracy and were afraid of vibration. Therefore, the precision of the mechanical gyroscope-based navigation system was not too high.
As a result, people began to look for better ways to develop laser gyroscopes, fiber optic gyroscopes, and microelectromechanical gyroscopes (MEMS) using physics advancements.
Although these things are called gyroscopes, their principles and traditional mechanical gyroscopes are completely different.
The fiber optic gyroscope utilizes the Sagnac effect, which calculates the angular velocity of rotation by measuring the optical path difference, and functions as a gyroscope to replace the function of the gyroscope.
The laser gyro also calculates the angular velocity by calculating the optical path difference, replacing the gyro.
The MEMS gyroscope uses the Coriolis force of physics to generate small capacitance changes inside, then measure the capacitance and calculate the angular velocity to replace the gyroscope.
The gyroscope used in the iPhone and our smartphones is the MEMS gyroscope (MEMS).
At present, traditional mechanical gyroscopes are being eliminated, laser gyros are used in places where high precision is required, and MEMS gyroscopes are popular.
Because microelectromechanical gyroscopes (MEMS) are microelectronics products that are developing rapidly and at a lower cost, they are becoming more widely used. Because of the dynamic requirements of our smartphones, we have used MEMS.
Ubiquitous gyroscope
Originally, gyroscopes existed on the tall, but because of the emergence of microelectromechanical gyroscopes (MEMS), low-cost gyroscopes can be used in many fields.
In addition to the smart phones we are familiar with, many MEMS gyroscopes are used in cars. In high-end cars, about 25 to 40 MEMS sensors are used to detect the working status of different parts of the car, and to provide information to the driving computer. Users have better control over the car.
In the game machine, behind all kinds of somatosensory operation functions are MEMS gyroscopes (MEMS).
In drones, wearable devices, the Internet of Things, and even the now popular industry 4.0, Internet +, it is also inseparable from it. As long as it is necessary to detect the state of motion, there is a microelectromechanical gyroscope (MEMS).
165 years ago, Leon Foucault invented the gyroscope for scientific research. Today, this little thing has changed our lives. Without it, there are no planes, no rockets, no modern life, which is probably not invented by his inventors. A small gyroscope makes our world a better place.
What is the use of the game gyroscope?The gyroscope is actually equivalent to three angle sensors. The internal MEMS process makes a reference coordinate system. When the coordinates of the chip rotate relative to the reference coordinates, the chip will read the difference. Therefore, measuring the inclination of the XYZ axis becomes achievable.
For example, in the racing class, twisting the mobile phone left and right can change direction, Need for Speed, etc. In the piranha, the mobile phone is controlled by various directions to control the shark's ascending, descending, advancing, and retreating actions.
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