Method for safety early warning for track curve and recording journey in navigation system

Abstract

The invention is a bend safety precaution method for a navigation system, for avoiding the damage in safety caused by fatigue or carelessness during driving in a vehicle, using GPS to learn the current coordinate point of the vehicle and using inertia measurer to learn the vehicle advancing direction, and taking a distance before the current coordinate point as a preestimated distance, comparing the current vehicle speed with the safe vehicle speed prestored in an electronic map within the preestimated distance: if the vehicle speed exceeds the safe vehicle speed, making an caution; and besides, completely recording actual vehicle speed, rotating angle of steering wheel, GPS coordinate point and time.

Description

technical field [0001] The invention relates to a navigation system, in particular to a curve safety early warning and driving recording method of the navigation system. Background technique [0002] As far as transportation is concerned, more and more users are gradually relying on navigation systems to guide driving routes and place names; however, the road information of many early navigation systems only uses images to display information. , without any guidance, so that this kind of navigation system can only provide a reference for driving direction, and its navigation value is low. [0003] Recently, the functions of the navigation system have been improved, and there are more sufficient guidance for the road conditions ahead, such as providing guidance on the legal maximum speed limit ahead, or capturing the shape of the intersection ahead, and displaying and zooming in, or guidance on the curve ahead, To provide the highest safe speed limit under this curve conditi...

AI Technical Summary

Problems solved by technology

[0003] Recently, the functions of the navigation system have been improved, and there are more sufficient guidance for the road conditions ahead, such as providing guidance on the legal maximum speed limit ahead, or capturing the shape of the intersection ahead, and displaying and zooming in, or guidance on the curve ahead, To provide the highest safe speed limit under this curve condition; for the design of the highest safe speed limit under the aforementioned curve conditions, such as US Patent No. 5,315,295 "VEHICLE SPEED CONTROL SYSTEM" is to use coordinate detection devices, road surface temperature sensors, After the road humidity sensor and speed sensor detect relevant information, they send back to the internal CPU for "real-time calculation (real-time calculation)" to calculate the safe speed limit. If the current vehicle speed exceeds the safe speed limit, a warning will be given. "Real-time calculation", as long as any sensor failure or real-time information is wrong, the calculation will be wrong and a wrong safe speed limit will be provided, which will cause the driver to make a wrong judgment and easily lead to a major car accident. In addition, the calculation mode of the above-mentioned safe speed limit value still has deficiencies, so this kind of system has a high degree of risk

[0004] Furthermore, the current navigation system has provided information for the front-end service of driving, such as the driving direction and speed limit of the aforementioned vehicle, but it is not enough for the back-end service of driving

Images