Vehicle navigation pointing device and method

Abstract

The invention relates to a vehicle navigation pointing device which is composed of a global navigation satellite system (GNSS) module, an acceleration sensor module, an image acquisition module, a processing module, a memory module and an output module. The GNSS module is used for receiving satellite signals of a GNSS system. The acceleration sensor module is used for collecting value of a micro-electromechanical system (MEMS) three-dimensional acceleration sensor. The image acquisition module collects an existing scene image frame through a camera. The process module receives navigation pointing information output by the GNSS module, the value of the MEMS three-dimensional acceleration sensor output by the acceleration sensor and the existing scene image frame output by the image acquisition module, and then inputs the navigation pointing information to an output module. A navigation pointing method of the vehicle navigation pointing device is also put forward. The vehicle navigation pointing device uses the scene image frame of a direction of forward motion of a vehicle to have an integrated calculation with historical navigation pointing information, so that continuous positioning and navigation capability can be provided under the condition of complex road condition which is covered heavily.

Description

technical field [0001] The invention belongs to the technical field of navigation pointing, and relates to a combined navigation pointing system and method, in particular to a vehicle-mounted navigation pointing device that uses GNSS data and image scene data collected by MEMS three-dimensional acceleration sensors and cameras for data fusion processing to obtain navigation pointing information and methods. Background technique [0002] GNSS (Global Navigation Satellite System) is a system that uses satellite constellations, ground monitoring stations and user receivers distributed in orbits near the earth to achieve global navigation. Satellite navigation systems currently in use and under construction include the US GPS (Global Positioning System), Russia's GLONASS (Glonass), China's COMPASS (Beidou II) and Europe's Galileo (Galileo) system. [0003] With the development of GNSS technology, various navigation terminal products have entered the lives of thousands of househ...

AI Technical Summary

Problems solved by technology

If the satellite positioning signal is weak or absent, such as entering tunnels or alleys and other areas with poor satellite positioning signal reception, the device will not be able to locate

Moreover, GNSS does not have the function of a compass. When the device travels or turns in place or within the range of GNSS navigation error (GNSS judges the static state), it cannot provide direction and navigation information.

[0004] Most of the existing technologies use gyroscopes and acceleration sensors to solve auxiliary positioning and navigation. The gyroscope is used to measure the rotation angle during the movement of the carrier, thereby measuring the heading of the carrier. However, the electronic gyroscope generally used has the disadvantage of being susceptible to electromagnetic interference. , while the mechanical gyroscope is bulky, expensive, and not easy to use

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