MEMS is short for Micro Electro Mechanical systems. Micro-electro mechanical systems (MEMS) technology is a 21st century frontier technology based on micro/nanotechnology, it is the technology of designing, processing, manufacturing, measuring and controlling micro/nano materials. It can be mechanical components, optical systems, driving components, electronic control system integrated into a whole unit of the micro system. The micro-electro mechanical system can not only collect, process and send information or instructions, but also act autonomously or acquire information according to external instructions. It uses a combination of microelectronic technology and micro-machining technology (including silicon body micro-machining, silicon surface micro-machining, LIGA and wafer bonding technology, etc.) to produce a variety of sensors, actuators, drivers and micro-systems with excellent performance, low price and miniaturization. Micro-electromechanical system (MEMS) is a new interdisciplinary technology developed in recent years, which will have a revolutionary impact on human life in the future. It involves mechanics, electronics, chemistry, physics, optics, biology, materials and other disciplines.
The traditional gyroscope is mainly use the conservation of angular momentum principle, so it is mainly a rotating object, its axis of rotation does not change with the rotation of its bearing bracket. But micromechanical gyroscopes don't work that way, because it's not easy to use micromechanical technology to fabricate a rotatable structure on a silicon substrate. Micromechanical gyroscopes utilize the coriolis force, the tangential force applied to a rotating object in radial motion. Here's how to derive the coriolis force. Readers of the science of dynamics should have no difficulty in understanding it.
Micromechanical gyroscopes may be designed and work in a variety of ways, but open micromechanical gyroscopes use the concept of angular velocity sensing of vibrating objects. Micromachined gyroscopes, which use vibrations to induce and detect coriolis forces, have no rotating parts and do not require bearings, and have been shown to be mass produced using micromachining techniques. Most micromechanical gyroscopes rely on alternating coriolis forces caused by orthogonal vibrations and rotations. Vibrating objects are suspended from the base by a flexible elastic structure. The overall dynamic system is a two-dimensional elastic damped system in which vibration and rotation induced coriolis forces transfer energy proportional to angular velocity to the sensing mode.
Micromechanical gyroscopes, used to measure the speed of a car's rotation (turning or rolling), form an active control system with a low accelerometer. The so-called active control system is once the abnormal state of the car is found, the system corrects the abnormal state in time or correctly deals with the abnormal state to prevent the occurrence of the car accident. When cornering, for example, the system measures angular velocity through a gyroscope to see if the steering wheel is hitting too hard or not hard enough, and actively applies appropriate brakes on the inside or outside wheels to prevent the car from leaving the lane. Now the system is mainly installed in high-end cars.
Application
Aerospace field:
In the field of aerospace, mems gyroscopes are widely used in the attitude control system of aircraft. By measuring the angular velocity and angle of the aircraft, the attitude information of the aircraft can be fed back in real time to help the aircraft maintain a stable flight state. At the same time, mems gyroscopes can also be used in the navigation system of the aircraft to provide accurate direction and position information to help the aircraft navigate and position.
Automotive navigation field:
In the field of automotive navigation, mems gyroscopes are used in vehicle navigation systems. By measuring the steering angle and steering speed of the car, the mems gyroscope can monitor the driving state of the car in real time, helping the navigation system accurately calculate the position and direction of the vehicle. In urban environments, due to the instability of GPS signals, mems gyroscopes can provide reliable navigation AIDS and improve the accuracy and reliability of navigation systems.
If you want to get more details about MEMS gyroscope,pls visit https://www.ericcointernational.com/gyroscope/mems-gyroscope/
More Technical Questions
1.How accurate is MEMS gyroscope?
3.What is the Hardware Interface of Ericco MEMS Gyro
4.What Data Format is High Performance MEMS Gyro
5.Analysis of the main performance parameters of MEMS gyroscope
6.How to Weld and Install High Performance MEMS Gyro
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