_{Can MEMS gyroscopes replace fiber optic gyroscope technology?}

_{MEMS gyroscope, also known as electronic gyroscope, it is a gyro chip. The gyroscope on iPhone 4 is this kind of gyroscope. Its main function is to continue accurate navigation through the gyroscope when there is no GPS signal.}

_{MEMS gyroscopes are silicon micro-electromechanical gyroscopes. Most MEMS gyroscopes rely on alternating Coriolis forces caused by mutually orthogonal vibrations and rotations. MEMS (Micro-Electro-Mechanical Systems) refers to a complete micro-electromechanical system that integrates mechanical elements, micro-sensors, micro-actuators, signal processing and control circuits, interface circuits, communications and power supplies.}

_{Characteristics of MEMS gyroscopes}

_{MEMS gyroscope uses the 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.}

_{1.       Compact size, low weight;}

_{2.       Low cost;}

_{3.       High reliability, working life exceeds 100,000 hours, can withstand 1000g shock;}

_{4.       Large measurement range}

_{Will MEMS gyroscope replace fiber optic gyroscope technology?}

_{The fiber optic gyroscope is a huge improvement after the laser gyroscope. It is a two-optical gyroscope that uses the Sagnac effect to calculate the angular velocity using the optical path difference. Compared with the laser gyroscopes, it is small in size, low in cost, and has an accuracy of one thousandth. Moreover it has no moving parts, so that it with high reliability.}

But compared with MEMS, it is still very expensive, and nearly a kilometer of optical fiber is wound into a bundle, which has problems with temperature coefficient, reliability, impact resistance, and long-term storage. Moreover, the current accuracy of MEMS is 10, which is equivalent to that of open-loop fiber optic gyroscopes, and is heading towards 1, so in some low-end and short-term applications, the energy of fiber optic practitioners is very tested. MEMS has obvious advantages such as small size, light weight, low cost, chip batch production, and high reliability, but it is a bit difficult for MEMS to reach 0.1 accuracy within ten years. Therefore, the market of fiber optic gyroscopes in the range of 0.1 to 1/1000 cannot be replaced in a short time.