Before introducing the combined navigation module, let's first understand what is combined navigation technology. Integrated navigation technology refers to the use of two or more dissimilar navigation systems to measure the same information, and the errors of each navigation system are calculated and corrected from these measurements. This article will introduce the integrated navigation module based on GNSS satellite navigation system and inertial navigation system.
Navigation
Our daily location information service is the GNSS satellite navigation system, so the understanding of the inertial navigation system is relatively simple. Here, SKYLAB will also give you a detailed introduction.
Inertial Navigation:
Inertial navigation is based on Newton's laws of mechanics. By measuring the acceleration of the carrier in the inertial reference system, integrating it with time, and transforming it into navigation coordinates, the speed, yaw angle and location, etc. However, due to the serious zero drift of the gyroscope and the vibration of the vehicle, the inertial navigation system cannot obtain high-precision orientation and speed information by directly integrating the acceleration, that is, the existing inertial navigation system is difficult to work independently for a long time.
Navigation:
The integrated navigation module makes full use of the advantages of the GNSS satellite navigation system and the inertial navigation system, and integrates the two navigation algorithms based on the optimal estimation calculation - the Kalman filter algorithm to obtain the optimal navigation results; especially when the satellite navigation system cannot work, use The inertial navigation system makes the navigation system continue to work, ensures the normal operation of the navigation system, and improves the stability and reliability of the system.
Combined Navigation Advantage Features:
Inertial navigation system errors can be found and calibrated to improve navigation accuracy;
Make up for the signal defect of satellite navigation and improve the navigation ability;
Increase the observation redundancy, improve the monitoring ability of abnormal errors, and improve the fault-tolerant function of the system;
Improve the anti-interference ability of system navigation and improve the integrity.
Combined Navigation Module:
SKYLAB integrated navigation module SKM-4DX proposes an intelligent identification algorithm for satellite navigation accuracy. Based on the high-precision navigation information provided by integrated navigation, the positioning accuracy of satellite navigation is identified. If the satellite navigation accuracy is good, integrated navigation is performed. The positioning accuracy of satellite navigation is identified. If the satellite navigation accuracy is good, integrated navigation is performed. Once the satellite navigation signal is found to be very poor or even lost, pure inertial navigation is performed. In short, the SKM-4DX integrated navigation module realizes integrated navigation and Autonomous switching of pure inertial navigation.
Combined Navigation Module
The integrated navigation module SKM-4DX adopts GNSS (BDS/GPS system joint positioning)/INS (inertial navigation) integrated navigation and positioning technology. With high-precision six-axis inertial devices and mature inertial algorithms, it does not require odometer or speed signal access, and Without strict installation requirements, it can provide high-precision positioning modules for vehicles even in weak signal environments such as tunnels and garages.
Measured route map of combined navigation module
Satellite navigation cannot be positioned in tunnels and underground parking lots. The inertial navigation module has demonstrated a high level of navigation and positioning performance through tests in multiple tunnels and underground parking lots.
Measured route map of tunnel and parking lot
For more selection applications of the integrated navigation module SKM-4DX, you can directly visit the SKYLAB official website or Alibaba store.