MEMS gyroscope, also called electronic gyroscope, is a chip. The gyroscope on the Iphone 4 is like this. The main function is to continue precise navigation through the function of the gyroscope when there is no GPS signal.
MEMS gyroscopes are silicon microelectromechanical gyroscopes. The vast majority of MEMS gyroscopes rely on the alternating Coriolis force caused by mutually orthogonal vibration and rotation. MEMS (Micro-Electro-Mechanical Systems) refers to a complete micro-electro-mechanical system that integrates mechanical elements, micro-sensors, micro-actuators, signal processing and control circuits, interface circuits, communications and power supplies.
Features of mems gyroscope:MEMS gyroscopes use coriolis theorem to convert the angular velocity of a rotating object into a DC voltage signal proportional to the angular velocity. Its core components are mass-produced through doping technology, photolithography technology, corrosion technology, LIGA technology, packaging technology, etc. The main features are
1. Small size and light weight, its side length is less than 1mm, and the weight of the device core is only 1.2mg.
2. Low cost
3. The reliability is good, the working life is more than 100,000 hours, and it can withstand the impact of 1000g.
4. Large measuring range
Does MEMS replace fiber optic gyroscope technology?Fiber optic gyroscope is a huge advancement of laser gyroscope. It belongs to two-beam gyroscope. It uses the Sagnac effect and calculates the angular velocity with the optical path difference. Compared with laser gyroscopes, it is small in size, low in cost, accurate to one thousandth, and has no moving parts. , High reliability, has been widely used. At present, there are mainly two factions in China, Beihang University and Zhejiang University. There are about 30 practitioners. The technology has been opened up, and most of the accuracy is only one-tenth. The industrial chain has moved to the central and western regions, and migrant workers can do it. However, compared to MEMS, it is still very expensive, and nearly a kilometer of fiber is wound into a tuft, and there are problems with temperature coefficient, reliability, impact resistance, and long-term storage. Moreover, the current accuracy of MEMS is 10 equivalent to that of open-loop fiber. Heading for 1, so in some low-end and short-term applications, it is very test the rough nerves of optical fiber practitioners, and the advantages of MEMS are small size and weight, low cost, chip batch size, high reliability, etc., but the accuracy of MEMS will enter within 10 years 0.1 is a bit difficult, so in the world where 0.1 to one thousandth can be optical fiber, it cannot be replaced in a short time.
The working principle of fiber optic gyroscopeThe realization of fiber optic gyroscopes is mainly based on Segnik’s theory: when the beam travels in a ring-shaped channel, if the ring-shaped channel itself has a rotational speed, then the time required for the light to travel along the direction of rotation of the channel is longer than that along this channel. It takes more time for the passage to rotate in the opposite direction. That is to say, when the optical loop rotates, in different advancing directions, the optical path of the optical loop will change relative to the optical path when the loop is stationary. Using the change of the optical path to detect the phase difference between the two optical paths or the change of interference fringes, the optical path rotation angular velocity can be measured. This is the working principle of the fiber optic gyroscope.
The latest Windows has multiple versions, including Basic, Home, and Ultimate. Windows has developed from a simple GUI to a typical operating system with its own file format and drivers, and has actually become the most user-friendly operating system. Windows has added the Multiple Desktops feature. This function allows users to use multiple desktop environments under the same operating system, that is, users can switch between different desktop environments according to their needs. It can be said that on the tablet platform, the Windows operating system has a good foundation.
Windows Tablet,New Windows Tablet,Tablet Windows
Jingjiang Gisen Technology Co.,Ltd , https://www.gisentech.com