In recent years, MEMS inertial sensors have developed rapidly and their accuracy has been continuously improved. Although there is still a big gap in accuracy compared with fiber optic gyroscope and laser gyroscope, MEMS inertial navigation system plays an important role in inertial navigation system because of its low price, small volume and light weight.
Subdivided by precision, gyroscopes can be divided into commercial gyroscopes, tactical gyroscopes, navigation gyroscopes and strategic gyroscopes. At this stage, MEMS gyroscope is the fastest developing market and technology. Benefiting from the adoption of MEMS gyroscope by smart phones, its market scale has achieved huge growth. According to the analysis and prediction of gyroscope by Draper laboratory in the United States in 2020, quartz / silicon MEMS gyroscope will occupy the field of medium and low precision applications, that is, consumer applications. The basic function is to measure the linear acceleration, inclination angle, rotation speed, vibration frequency and force of the object. These basic physical signals can derive a variety of functions through the development of application programs.
Development trend of gyroscope in 2020
In addition, although it is currently in the field of strategic high-precision applications (represented by aerospace and national defense), it is the world of fiber optic gyroscope. However, in the future, with the continuous development of MEMS material technology and manufacturing technology, MEMS inertial sensors will develop towards lightweight and miniaturization, the accuracy of MEMS inertial navigation system will be continuously improved, and its cost will be continuously reduced. Therefore, it is an important development trend to replace optical fiber gyroscope with strategic high-precision MEMS gyroscope.
Nowadays, some high-precision MEMS inertial sensors are used in intelligent shells, optical aiming and stabilization systems, underwater object navigation, aircraft attitude monitoring, battlefield robots, etc. they are also the inevitable choice of guidance weapon systems such as air defense missiles, anti tank missiles and portable missiles. It is expected that by 2020, 90% of the US military’s guidance weapons will use MEMS inertial sensors.