Now, when we opened for rabbit testing phone hardware, often found in the sensor bar has a thing called gyro sensors. On this phone is mainly used to test mobile stance, we play games without it, some camera phone image stabilization when using it. Hello Kitty iPhone 5S case
However, this seemingly universal history on a very large, what is it exactly? We take a look at.
One, gyroscope invented
Gyro sensor of the phone now has evolved into a small chip, but when the gyroscope appears, it is a mechanical device.
At present, it is generally considered to be 1850 France physicist Léon Foucault (J.Foucault) in order to study the Earth's rotation, invented the gyroscope. Gyro can be interpreted that era into a high-speed rotating gyro gimbal top, because when the gyro is rotating at high speed stable, people can pass gyroscope orientation in the direction determined attitude, calculation of angular velocity.
Gimbal can guarantee no matter how rotation, gyroscopes fail, gimbal this harks back to censer China thousands of years ago.
Gyros after the invention, the first to be used in navigation (when there is no invention of the airplane), and was later used on the air. As the plane flew in the air, is not the same as ground by macroscopic orientation, and see clearly are extremely dangerous in flight direction, so gyro applied quickly, be central to the flight instruments.
To the second world war, defying manufacturing new weapons in all States, the Germans carried out missile to blow United Kingdom, this is the prototype of the missile. Germany flew to the United Kingdom, the way how to make missiles could fly to, also fell to target?
So, Germans out of inertial guidance systems. Gyroscope inertial guidance systems used to determine the direction and speed test acceleration using accelerometer, and through mathematical calculations, you can calculate the distance and course of missile flight and control attitude, striving to enable missiles fell to where we want to go.
When the second world war, computers, instruments, accuracy was not enough, so Germany missiles a significant margin, wanted to bomb London, results blow everywhere, the British panicked for a while.
However, since then, based on the gyroscope inertial guidance systems are widely used in aerospace, missile there is still this thing today, and with the stimulation of demand, gyroscopes are also evolving.
Second, evolution of gyroscopes
Earliest mechanical gyroscope, which really have a high speed spinning top, and mechanical requirements for high precision, would shake, so precision mechanical gyroscope-based navigation system are not too high.
https://www.youtube.com/watch?v=MfzZimP6ygQ
So people started looking for a better way, progress in physics, develops laser gyroscopes, fiber optic gyroscopes and MEMS gyroscopes (MEMS).
Although these things are also called gyros, but their principles and the traditional mechanical gyroscope is are two different things entirely.
Fog is used sagenake (Sagnac) effect by light transmission characteristics, measurement of optical path difference to calculate the angular velocity of rotation, play the role of gyroscopes, replaced gyroscopes function.
Laser gyroscope angular velocity through an optical path difference calculation, replace gyroscopes.
MEMS gyro is to use Coriolis forces of physics, have a small capacitance changes in internal and measurement, calculate the angular velocity, replaced gyroscopes.
IPhone and Smartphone we might use gyroscopes are MEMS gyroscopes (MEMS).
At present, the traditional mechanical gyroscope is being phased out, is used where there is demand for high precision laser gyroscopes, and universal is MEMS gyroscopes.
Because MEMS gyroscopes (MEMS) belongs to the microelectronics, rapid development, and is getting cheaper, so more and more widely used. Our smartphones to detect dynamic because of the demand, so he used MEMS gyroscopes (MEMS).
Third, the ubiquity of gyroscope
Gyro is the presence of large, but because the MEMS gyroscopes (MEMS) the emergence of low-cost gyro can be used in many fields.
In addition to the familiar other than smart phones, cars also use a lot of MEMS gyroscope in a fancy car, about 25 to 40 MEMS sensor, used to detect cars in different parts of the State, to the trip computer provides information, allowing users to better control of the car.
And inside the game, behind the various somatosensory function is MEMS gyroscopes (MEMS).
Unmanned aerial vehicles, wearable devices, Internet of things, even now, hot technology industry 4.0, Internet +, and can't do without it, as long as it needs to detect motion where MEMS gyroscopes (MEMS).
165 years ago, Léon Foucault created the gyroscope for scientific research. Today, the small things that make our lives have been dramatically changed, without it, there would be no aircraft, no rockets, no modern life, this is probably his inventors have not thought of. Tiny gyroscopes and make our world a better place.
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Millet Note Hat Edition
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