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How to distinguish between accelerometer and gyro sensor Release date:2019-03-25   Browsing volume:478

For those unfamiliar with such products, the gyro sensor is an easy-to-use positioning and control system based on free-space movement and gestures. When you mouse over the imaginary plane, the cursor on the screen moves, and you can circle and click the button around the link. These operations can be easily implemented when you are speaking or leaving the table. The gyroscope sensor was originally applied to the helicopter model and has been widely used in mobile portable devices such as mobile phones.


Principle of gyroscope:

The direction of the axis of rotation of a rotating object does not change when it is not affected by external forces. According to this principle, people use it to maintain their direction. The direction indicated by the axis is then read in a number of ways and the data signal is automatically transmitted to the control system. We also use this principle to ride a bicycle. The faster the wheels turn, the less likely they are to fall because the axle has a level of strength.


Modern gyroscopes are instruments that accurately determine the orientation of moving objects. They are an inertial navigation instrument widely used in the modern aviation, marine, aerospace and defense industries. The main part of the traditional inertial gyroscope has a mechanical gyroscope, while the mechanical gyroscope has a high requirements on the process structure. In the 1970s, the basic idea of modern fiber optic gyroscopes was proposed. After the 1980s, fiber optic gyroscopes developed very rapidly, and laser resonant gyroscopes also developed greatly. The fiber optic gyroscope has a compact structure, high sensitivity and reliable operation. Fiber optic gyroscopes have completely replaced mechanical traditional gyroscopes in many fields and become a key component in modern navigation instruments.


Gyro sensor application:

Defense industry

The gyro sensor was originally applied to the helicopter model, and it has been widely used in mobile portable devices such as mobile phones. Not only is the modern gyroscope an instrument that can accurately determine the orientation of a moving object, so the gyro Instrument sensors are essential controls in modern aerospace, marine, aerospace and defense industrial applications. Gyroscopes have been the most convenient and practical reference instrument for aeronautical and marine navigational attitudes and speeds.

Door opener

A new application of the gyro sensor: measuring the angle of the door opening, when the door is opened at an angle, an alarm sounds, or a text message is sent in conjunction with the GPRS module to remind the door to be opened. In addition, the gyro sensor integrates the function of the acceleration sensor. When the door is opened, a certain acceleration value will be generated. The gyro sensor will measure the acceleration value. When the preset threshold value is reached, an alarm sound will be generated. Or send a text message in conjunction with the GPRS module to remind the door to be opened. The radar sensor measurement function can also be integrated in the alarm, which is mainly measured by the radar when someone moves into the room. Double insurance reminds theft, high reliability, low false alarm rate, very suitable for burglar alarms in important occasions.


Principle of the acceleration sensor:

An acceleration sensor is an electronic device that measures acceleration. Acceleration is the force that acts on an object during acceleration, just like gravity, or gravity. Acceleration can be a constant, such as g, or a variable. There are two types of accelerometers: one is an angular accelerometer, which is improved by a gyroscope (angular velocity sensor). The other is a line accelerometer. By measuring the acceleration due to gravity, the angle of inclination of the device relative to the horizontal plane can be calculated. By analyzing the dynamic acceleration, you can analyze how the device moves.


Difference between gyro sensor and acceleration sensor:

Types of accelerometers include MEMS accelerometers, piezoelectric accelerometers, piezoresistive accelerometers, and other types of accelerometers. Types of gyroscopes include MEMS gyroscopes, ring laser gyroscopes, fiber optic gyroscopes, hemispherical resonant gyroscopes, power-tuned gyroscopes, and other types of gyroscopes. In terms of value, MEMS accelerometers and gyroscopes account for the majority of the market in all major accelerometer and gyroscope markets.


The gyroscope measures the angular velocity, and the acceleration is the linear acceleration. The former is the principle of inertia, and the latter is the principle of force balance.


The accelerometer's measured value is correct for a long time, and there is an error due to the presence of signal noise in a short time. Gyros are more accurate in a shorter period of time and there is an error in drifting over a longer period of time. Therefore, both (mutual adjustments) are needed to ensure the correct heading.

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