Road speed limit detection system

Abstract

The present invention discloses a road speed limit detecting system. The system comprises a vehicle positioning device, an on-the-way identification device and a processor. The vehicle positioning device outputs a road segment speed limit corresponding to the current position information. The on-the-way identification device outputs an on-the-way speed limit and environmental parameters. The processor selectively outputs the on-the-way speed limit or does not output the on-the-way speed limit after finding out that the on-the-way speed limit is different from the road segment speed limit. Therefore, by means of the road speed limit detecting system, an instant and latest road segment speed limit can be obtained through the on-the-way identification device. The conditions that wrong speed limits are displayed due to the non-timely updating of map information and map data, and wrong location positions and corresponding wrong speed limits are displayed due to weak GPS signals, can be avoided. In addition, whether speed limits acquired by the on-the-way identification device are suitable or correct speed limits or not can be judged with the assistance of the on-the-way identification device.

Description

technical field [0001] The invention relates to a detection system, in particular to a road speed limit detection system. Background technique [0002] With the advancement of technology, vehicles are now generally equipped with driving assistance devices, such as driving positioning devices, speed limit detection devices, navigation equipment, etc., to assist the driver in providing various information on the road while driving, such as The road section, lane or speed limit that is currently driving, etc., so that the driver can understand the speed limit of the road that is currently driving, and avoid being photographed for speeding. [0003] In terms of speed limit detection currently on the market, there is an image-based speed limit detection device, which utilizes the analysis of captured speed limit images to obtain the speed limit of the current driving section. In addition, the driving positioning system is also used to provide speed limit warnings. It uses the ro...

AI Technical Summary

Problems solved by technology

Furthermore, if the map data is not updated in time, it is easy to cause the speed limit information in the memory to be inconsistent with the actual situation. Incorrect

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