A real-time simulation navigation method
A technology of real-time simulation and navigation method, which is applied in the field of car navigation and can solve the problem of inaccurate navigation of mobile terminals
Active Publication Date: 2021-10-08
上海酷驾智能技术有限公司
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Problems solved by technology
[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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A real-time simulated navigation method, when the satellite positioning signal is detected to be lost, record the current geographic location and its position in the entire navigation path, start the simulated navigation thread for real-time simulated navigation: obtain the remaining navigation path trajectory in the entire navigation path Point set P; start OBD vehicle speed query, set the first navigation path track point in the navigation path track point set P as the initial simulation navigation point; calculate the time interval Δt between the current position of the vehicle and the current simulation navigation point; Obtain the current vehicle speed v from OBD, estimate the driving distance d_move of the vehicle within the time interval Δt; calculate the distance d between the current simulated navigation point and the next navigation path track point; dynamically update the simulated navigation thread according to the relationship between the driving distance d_move and the distance d The waiting time and the current simulated navigation point; after the waiting time of the simulated navigation thread is over, the next navigation point is simulated. In the case of loss of satellite positioning signals, real-time simulated navigation is performed according to the actual speed of the vehicle.
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