Navigation device and method

Abstract

The invention provides a navigation device, which comprises a receiving GPS signal, a GPS module which analyzes the GPS signal to generate GPRS navigation data, an inertial navigation module which collects inertial navigation data, a control module which calibrates the inertial navigation data and the GPS navigation data according to the GPS signal strongness or weakness determined by the GPS navigation data, and a hint module which outputs in an image or a sound mode. The invention also provides a navigation method, which comprises the steps of: receiving the GPS navigation signal, and resolving to generate the GPS navigation data; collecting the inertial navigation data; calibrating the inertial navigation data and the GPS navigation data according to the GPS signal strongness or weakness determined by the GPS navigation data, and generating the navigation information; and outputting the navigation information. The inertial navigation data and the GPS navigation data are calibrated according to the GPS signal strongness or weakness, and the navigation information is generated, therefore, the navigation accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a navigation device and method combining GPS navigation and inertial navigation. Background technique [0002] Existing GPS (Global Position System, Global Positioning System) navigation device realizes GPS navigation by receiving GPS signals, but because GPS signals are different in strength due to different areas, when in areas with weak GPS signals, GPS navigation The device easily leads to inaccurate navigation; or when there is no GPS signal area, the so-called "blind zone", such as bridges, tunnels and other places, GPS navigation cannot be performed. To solve this problem, the specific location can be determined by inertial navigation. For example, when the car enters the GPS signal blind area from the GPS signal area, the sensor collects data such as the speed, acceleration, and heading of the car, and the speed data is sent to the controller through wireless. Accelera...

AI Technical Summary

Problems solved by technology

[0003] Although the above-mentioned GPS navigation equipment can navigate in the blind area of ​​the GPS signal through the inertial navigation method, this inertial navigation method needs to transmit the data of the vehicle speed to the GPS navigation equipment through wireless means, which is susceptible to electromagnetic interference.

At the same time, in the process of GPS navigation, because GPS navigation is affected by the change of satellite constellation diagram, drift occurs and cannot be corrected, so the accuracy of navigation is poor

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