Real-time simulation navigation method
A navigation method and real-time simulation technology, applied in the field of car navigation, can solve the problem that mobile terminals cannot accurately navigate
Active Publication Date: 2018-08-28
上海酷驾智能技术有限公司
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[0003] Aiming at the problem that the mobile terminal cannot navigate accurately when the satellite signal is lost, this application provides a real-time analog navigation method. When the satellite positioning signal is detected to be lost, the current geographic location and its position in the entire navigation path are recorded. Start the simulated navigation thread for real-time simulated navigation, the simulated navigation includes steps:
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[0021] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0022] The terms used in this application are explained as follows:
[0023] Navigation: here refers to car navigation, which is carried out by using global satellite navigation systems (such as GPS, Beidou navigation) and electronic maps. It tells the driver the shortest or fastest route to the destination, locates the car's position on the map in real time through satellites, and constantly updates the driver's actual route to the destination.
[0024] Navigation path: The driving path from the starting point to the destination planned by the car navigation according to certain rules (such as the shortest path) based on the electronic map.
[0025] Navigation path track points: The navigation path is composed of a series of track points, and each track point is represented by the latitude and longitude on the electronic map.
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The invention discloses a real-time simulation navigation method. The real-time simulation navigation method comprises the following steps of: when detecting the loss of satellite positioning signals,recording a current geological position and the position in the whole navigation path, and starting a simulation navigation thread to carry out real-time simulation navigation; acquiring a set P of the remaining navigation path track points in the whole navigation path; starting OBD (On Board Diagnostic) speed query, and setting a first navigation path track t in the set P of navigation path track points as a starting simulation navigation point S; calculating a time interval deltat between a current position of a vehicle and a current simulation navigation point S; acquiring a current speedv from the OBD, and estimating a traveling distance d_move of the vehicle in the time interval deltat; calculating the distance d between simulation navigation point S and next navigation path track point; according to the size relation of the traveling distance d_move and the distance d, dynamically updating a waiting time of the simulation navigation thread and the simulation navigation point S;after the waiting time of the simulation navigation thread is ended, carrying out simulation of next navigation point. The real-time simulation navigation method disclosed by the invention has the beneficial effect that under the condition of loss of the satellite positioning signals, real-time simulation navigation is carried out according to the actual speeds of the vehicles.
Description
technical field [0001] The invention relates to the technical field of car navigation, in particular to a real-time analog navigation method. Background technique [0002] In the process of driving, mobile terminals, such as mobile phones, are often used for real-time navigation. However, satellite positioning signals, such as GPS signals, are often lost, resulting in the inability to locate the current position of the vehicle. In case of loss, accurate navigation cannot be continued. Contents of the invention [0003] Aiming at the problem that the mobile terminal cannot navigate accurately when the satellite signal is lost, this application provides a real-time analog navigation method. When the satellite positioning signal is detected to be lost, the current geographic location and its position in the entire navigation path are recorded. Start the simulated navigation thread for real-time simulated navigation, the simulated navigation includes steps: [0004] S1: Obta...
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IPC IPC(8): G01C21/34G01C21/36
CPCG01C21/343G01C21/3617G01C21/3658
Inventor 胡鑫姜涛
Owner 上海酷驾智能技术有限公司