Principle And Application Of Micro Accelerometer

Micro-accelerometer is a kind of very important micro-inertial sensor, which is widely used in vibration detection, inertial measurement, inertial navigation and other technical industries. With the maturity of micro-nano processing technology, micro-accelerometer technology has been rapidly developed. In recent years, micro-accelerometer technology research and productization based on micro-electro-mechanical systems (MEMS) and micro-electromechanical systems (MOEMS) has become a key development direction.

In the 20 century 40 in the early 1990s by the Germans developed the world’s first pendulous gyro accelerometer. For more than half a century, various accelerometers came into being due to the demand for inertial measurement elements in aerospace, aviation and navigation fields, and the performance and accuracy have also been greatly improved.

One of the most important inertial instruments as accelerometers are available, used in inertial navigation and guidance system, and automatic weapons and high technology and its driving carrier of high precision guidance together. The accelerometer at this time is very expensive, so that it is rarely asked in other fields.

It was not until the advent of micromachined accelerometers that this situation had changed. With the development of MEMS technology, inertial sensors have become one of the most successful and widely used MEMS devices in the past few years, and micro accelerometer is an outstanding representative of inertial sensors.ER-MA-5 has the characteristics of small size, light weight and low energy consumption, which can be widely used in vibration detection, attitude control, security alarm, consumer applications, motion recognition and status recording. The accelerometer is combined with a gyroscope and magnetometer to form an inertial measurement Unit (IMU).

Principle

The theoretical basis of the microaccelerometer is Newton’s second law, according to the basic principles of physics, within a system, the speed cannot be measured, but its acceleration can be measured. If the initial velocity is known, the linear velocity can be calculated by integrating, and the linear displacement can then be calculated. Combined with a gyroscope (used to measure angular velocity), the object can be precisely positioned. According to this principle, people have long used accelerometers and gyroscopes to navigate ships, aircraft and spacecraft. In recent years, the technology has been used to drive cars autonomously and guide missiles. The rapid development of the automobile industry has found a new application field for the accelerometer. The anti-collision airbag of the automobile is controlled by the accelerometer.

Application field

Industrial field

Piezoelectric acceleration sensors are widely used in industrial control and monitoring systems to measure vibration and shock of mechanical equipment, which is essential for the proper operation and maintenance of equipment. In the automotive industry, for example, piezoelectric acceleration sensors can be used to monitor vibrations in vehicles, providing a more accurate driving experience and vehicle health.

Aerospace field

Because of their sensitivity to high frequency vibration and shock, piezoelectric acceleration sensors have important applications in the aerospace field. They can be used to measure and analyze the vibration characteristics of aircraft structures to help improve aircraft performance and structural design.

Medical field

Piezoelectric acceleration sensors are also widely used in medical equipment, such as body motion monitoring, scalpel vibration monitoring and so on. They can measure and record the movement and vibration data of human body in real time, which plays an important role in analyzing the posture and behavior pattern of human body.

Smartphones and electronic devices

Piezoelectric acceleration sensors are also widely used in modern smart phones and electronic devices. They can measure the tilt, roll and motion state of the device, and realize automatic adjustment, positioning and attitude recognition through relevant algorithms.