The Smallest Size MEMS North Seeker

World's smallest MEMS north finder principle
The principle of MEMS north finding is to sense the direction of the geomagnetic field by using the principle of magnetic field induction or gyroscopic effect. When the MEMS device is exposed to the geomagnetic field, the magnetoresistance, gyroscope, optical sensor or acceleration sensor will be affected by the magnetic field, so as to realize the perception of the geomagnetic field direction.

Advantages and application scenarios of the world's smallest MEMS north finder

Compared with the traditional magnetic compass, MEMS north finding technology has the advantages of small size, low power consumption and fast response speed. ER-MNS-06 is a MEMS gyroscope as the core of the smallest volume of the north finder, only 44.84×38.88×21.39mm, weight is 60g. The north finding accuracy can reach 0.25°~ 1°, and the update rate is 200Hz. With the advantages of high precision, light weight and low power consumption, it can quickly and autonomously determine the true north direction. The mems gyroscope used has 0.02°/hr bias instability and 0.005°/√hr Angle random walk to meet the needs of medium and high precision measurement and is small enough to facilitate the use of equipment with high space and power consumption requirements. Therefore, it is not only widely used in the national defense high-tech fields such as satellites, missiles, high-precision inertial navigation system initial alignment, but also in geophysical exploration, coal mining, geodetic survey, mining, underground drilling engineering, tunnel digging, as well as unmanned vehicle autonomous driving system, vehicle positioning directional navigation system and other civilian fields.

The composition of the world's smallest MEMS north finder

MEMS gyroscope, accelerometer, mechanical rotation device and signal solving circuit constitute a miniature gyro north finder, this smallest north finder is composed of a three-axis MEMS gyroscope and MEMS accelerometer to detect the Earth's magnetic field, so as to calculate the azimuth Angle, the product collects the output of the gyroscope under different azimuth angles, and performs signal processing to calculate the azimuth Angle of the device.

Improvements to the world's smallest MEMS north finder technology

1. The optimized design of the sensor can improve the performance of MEMS north finding technology. ER-MNS-06 has improved the structural design and manufacturing process of its internal sensors. Compared with other MEMS north finder, it not only improves the sensitivity of the sensor, reduces the error, but also makes its power support only 5±0.25V, and the power is 2W.

2. The improvement of data fusion algorithm can improve the accuracy and stability of MEMS north finding technology. By optimizing the data fusion algorithm, the processing ability of sensor output data can be improved, and the influence of error and noise on system performance can be reduced.

Future trends of the world's smallest MEMS north finder

The application of multi-sensor fusion technology can improve the accuracy and stability of MEMS north finding technology. By fusing the output data of multiple sensors, the error and noise can be reduced and the performance of the system can be improved.

The improvement and optimization of data processing algorithm can improve the performance of MEMS north finding technology. By optimizing the data processing algorithm, the processing ability of sensor output data can be improved, and the influence of error and noise can be reduced.

Further enhancement of the manufacturing process can improve the performance and reliability of MEMS north finding technology. By optimizing the manufacturing process, the manufacturing error can be reduced and the consistency and stability of the device can be improved.

The prospect of the world's smallest MEMS north finder

As an important part of navigation system, MEMS north finding technology has broad application prospects. With the continuous development and maturity of MEMS technology, the performance of MEMS north finding technology will be further improved, and the application range will be more extensive. The future development of MEMS north finding technology will focus on improving accuracy and stability, reducing cost and volume, optimizing data processing algorithms and manufacturing processes. At the same time, the application of multi-sensor fusion technology and the improvement of system calibration method are also the future development direction.