For those unfamiliar with such products, gyroscopic sensors are a simple and easy-to-use positioning and control system based on free-space movement and gestures. By swinging the mouse on a hypothetical plane, the cursor on the screen moves along and can circle the link and click the button. When you are speaking or leaving the table, these operations can be easily realized. Gyroscope sensors, originally used in helicopter models, have been widely used in mobile portable devices such as mobile phones.

The principle of gyroscope

The direction of the rotation axis of a rotating object will not change without external force. According to this principle, people use it to maintain direction. Then, the directions indicated by the shaft are read in a variety of ways, and the data signals are automatically transmitted to the control system. We actually use this principle to ride bicycles. The faster the wheel turns, the less likely it is to fall because the axle has a level of power.

Modern gyroscope is an instrument that can accurately determine the orientation of moving objects. It is an inertial navigation instrument widely used in modern aviation, navigation, aerospace and defense industries. The traditional inertial gyroscope is mainly composed of mechanical gyroscope, and the mechanical gyroscope has a high requirement on the process structure. The basic idea of modern fiber optic gyroscope was put forward in the 1970s. Since the 1980s, fiber optic gyroscope (FOG) has been developed rapidly, and laser resonant gyroscope (LRG) has also been greatly developed. Fiber optic gyroscope has the advantages of compact structure, high sensitivity and reliable operation. Fiber optic gyroscope (FOG) has completely replaced the traditional mechanical gyroscope in many fields and become a key component of modern navigation instruments.

Gyroscope sensor application

National defense industry

Gyroscopic sensors were originally used in helicopter models, but now they are 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 moving objects, so gyroscopic sensors are modern aviation, navigation, aerospace and defense industries. Essential control devices in application. Gyroscope has been the most convenient and practical reference instrument for aviation and navigation attitude and speed up to now.

Alarm for door opening

New applications of gyroscopic sensors: measuring the angle of the door, making an alarm when the door is opened at an angle, or sending a text message with the GPRS module to alert the door to be opened. In addition, the gyroscope sensor integrates the function of acceleration sensor. When the door is opened, it will produce a certain acceleration value. The gyroscope sensor will measure the acceleration value. After reaching the preset threshold, it will send an alarm, or send a short message to remind the door to be opened by combining with the GPRS module. The alarm can also be integrated with radar induction measurement function, mainly when people move into the room will be measured by radar. Double insurance reminds theft, high reliability and low false alarm rate, so it is very suitable for burglar alarm in important occasions.

Principle of acceleration sensor

Acceleration sensor is an electronic device that can measure acceleration force. Accelerating force is the force acting on a body during acceleration, which is like gravity, or gravity. Acceleration can be a constant, such as G, or a variable. There are two kinds of accelerometers: one is angular accelerometer, which is improved by gyroscope (angular velocity sensor). The other is linear accelerometer. By measuring the acceleration caused by gravity, the tilt angle of the equipment relative to the horizontal plane can be calculated. By analyzing the dynamic acceleration, we can analyze the way the device moves.

Difference between gyroscope sensor and acceleration sensor

The acceleration of angular velocity is measured by linear acceleration. The former is the principle of inertia and the latter is the principle of force balance.

The accelerometer is correct in a long time, but there is error in a short time because of the existence of signal noise. Gyroscopes are more accurate in a relatively short period of time, while there are errors in drifting for a long time. Therefore, it is necessary to adjust each other to ensure the correct heading.