System Analysis of MEMS North Seeker

In north-seeking navigation technology, inertial north-seeking technology is not subject to external interference and can independently complete the north-seeking task. However, high-precision and high-performance inertial components are usually extremely expensive. The micromechanical north seeker is a high-tech product and one of the particularly important branches in the field of contemporary micromechanical electronic systems (MEMS). It is produced based on micromachining manufacturing technology and is also one of the emerging branches in the inertial field in recent years. It is the development direction of inertial measurement components in the future, with low cost, micro size, medium accuracy, high overload resistance, low power consumption and high reliability. In the military field, attitude measurement systems and inertial navigation systems are used. In the civilian field, they can be used for attitude measurement and direction positioning of robots, satellites, photography, aircraft, automobiles, medical equipment, and toys. Because the price is very low, it is one of the representatives of new micro-electromechanical products at home and abroad, and is suitable for mass production. The development of MEMS technology has also brought development opportunities for low-cost gyro north finders.

1.Composition of North Seeking System

The north-seeking system consists of two parts: software and hardware. The system hardware is responsible for the collection and transmission of sensor data. The hardware part is controlled by the north-seeking software and executes the instructions sent by the software. North seekinhg software is mainly responsible for the control of the entire system, system initialization, command sending and other functions. The operator can set and operate the entire system through the software's human-computer interaction interface.

The design of the north-seeking system is also an important research content of this article. The size of the north-seeking system error is closely related to the design of the two major modules of hardware and software. The hardware level determines the mechanical accuracy of the north-finding instrument. The software can filter the signal through algorithms and can also effectively reduce the error and increase the speed of north-finding. Therefore, the research content involved in north seeking system hardware design includes: chip selection, device layout, and reduction of machining errors; the research content involved in software design includes: determination of system process, use of controls, and human-computer interaction interface design, algorithm implementation, etc.

2.Design and implementation of north seeking system

According to the system design requirements and indicators, this system mainly includes three major modules: inertial device module, hardware module, and host computer module. The hardware module is responsible for collecting data, executing control instructions, etc. The main functions of the host computer module are system initialization settings, data processing, issuing north-seeking instructions, and displaying north-seeking results. The overall implementation steps of the system are shown in the figure.After the north-seeking software issues a north-seeking command, the north seeker collects sensor data and sends it to the north-seeking software database. In order to speed up the north-seeking software and prevent the north-seeking software from being stuck due to no response or other system freezes, the software starts a new thread. Solution of the north-finding algorithm. Data processing also includes sensor calibration during initialization.The entire north-seeking system process is mainly divided into three stages: the system initialization stage, including hardware initialization, host computer initialization, sensor data acquisition and calibration; after the calibration is completed, wait for the host computer to send the north-seeking command, and the lower computer receives the command. Start driving the stepper motor to rotate the corresponding position. The host computer filters the collected sensor data and calculates the north-seeking algorithm to obtain the north-seeking result. After the result is output, the task is completed.

3.Summary

The north seeker can work independently and is not restricted by the external environment at all. Its working time can be continuous and its accuracy is very high. As an important technology for inertial navigation products, it is currently deeply loved by customers at home and abroad. Therefore, the inertial north-finding method has huge application value and deserves vigorous research by the country. In recent years, with the development of industrial technology, navigation technology and manufacturing technology have also made great progress. North seekers have made great progress in many fields with their unique advantages such as low cost, speed and accuracy. Currently our high-performance three-axis MEMS north seeker and the smallest size north seeker are our best-selling products. If you are interested, you can learn about our specific product parameters.