I will tell you how the gyroscope works.

Recently, I listened to the professional gyroscope lectures of the sensor colleagues of Daniel, and explained the principles and applications of the gyroscopes to Xiaobian, and took some time to sort out some of the contents, giving the friends who are not clear about this technology. Oh~

The gyroscope is a device for measuring the angular velocity. Based on the acceleration function, it can be further developed to construct a gyroscope.

The internal principle of the gyroscope is as follows: apply voltage to the fixed finger, and alternately change the voltage, let a mass move back and forth in an oscillating manner. When rotating, the Coriolis acceleration will be generated, and then it can be measured. This is a bit like an accelerometer. The decoding method is roughly the same and the amplifier is used.

The angular rate is determined by the Coriolis acceleration measurement

Coriolis acceleration = 2 × (w × mass velocity)

w is the angular rate of application (w = 2 πf)

Fast coupling to the accelerometer frame by the speed (periodic motion) applied by the 14 kHz resonant structure

The Coriolis acceleration has the same frequency and phase as the resonator, so it can offset low-speed external vibration

The mechanical system is similar in structure to accelerometers (micromachined polysilicon)

Signal conditioning (voltage conversion offset) uses techniques similar to accelerometers

A varying voltage is applied to move the device back and forth, at which point the device has only horizontal motion and no vertical motion. If a rotation is applied, it can be seen that the device will move up and down, and the external finger will perceive the motion so that the rotation-related signal can be picked up.

The above animation is just an abstract display of the working principle of the gyroscope, and the actual gyroscope internal structure is like this, don't accidentally misunderstand it~

PS: The gyroscope can be designed together in three, corresponding to so-called rolling, pitching and yaw. Anyone who knows the aircraft knows that pitching refers to the up and down direction of the aircraft, yaw is the left and right direction, and scrolling is pointing to the left or right. To properly control any type of aircraft or missile, you need to know these three parameters, which will use the gyroscope. They are also often used for car navigation, and when the car enters the tunnel and loses GPS signals, these devices record your whereabouts.