Vehicle Speed Advisor Integrating GPS and Memory for Speed Limit Display
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Solution Overview
Problem
Conventional speedometers do not provide an indication of the vehicle's speed relative to posted speed limits, leaving drivers unaware if they are exceeding local speed limits.
Innovation Solution
A vehicle speed advisor system that integrates a GPS module and memory device to display local speed limits on the speedometer, using color indicators (green for below and red for above the limit), with optional Wi-Fi for updating speed limit data, and a telltale indicator for GPS signal status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a conventional speedometer is used, then the vehicle speed can be indicated, but the driver cannot determine whether the vehicle is exceeding the posted speed limit
Solution Approach 1:
The patent combines the conventional speedometer function with speed limit indication by integrating a GPS module, memory device, and controller into the speedometer system. This merging allows the single device to simultaneously display vehicle speed and provide speed limit information, eliminating the need for separate devices while resolving the information loss problem.
Solution Approach 2:
The speedometer is transformed into a multi-functional device that not only indicates vehicle speed but also provides speed limit information and visual indicators (green/red) to show compliance status. This universalization allows one device to serve multiple purposes: speed measurement, speed limit display, and driving behavior feedback.
2Loss of information
If GPS and memory devices are integrated into the speedometer, then speed limit information can be displayed, but the device complexity increases
Solution Approach 1:
The memory device pre-stores speed limit data for various locations before the vehicle reaches those areas. The GPS module continuously determines the vehicle's position and retrieves corresponding speed limit information from memory in advance, allowing the system to provide accurate speed limit information without requiring real-time data transmission or complex processing at the moment of need.
Solution Approach 2:
The controller acts as an intermediary between the GPS module, memory device, and speedometer display. It receives location data from GPS, queries the memory device for corresponding speed limit information, processes this data, and presents it to the driver through visual indicators on the speedometer face, thereby coordinating multiple components into a unified system.
3Reliability
If the speed limit is displayed on the speedometer, then the driver can monitor compliance continuously, but the driver must trust the system's accuracy
Solution Approach 1:
The system provides continuous visual feedback to the driver through color-coded indicators on the speedometer face - green when the vehicle is below the speed limit and red when at or above the limit. This immediate feedback mechanism builds driver trust by continuously validating compliance status and allowing the driver to verify the system's accuracy through the intuitive color-coding system.
Data Source
AI summary
A vehicle speed advisor system that provides an indication of the local speed limit to the driver in order to warn the driver when the local speed limit has been exceeded. The system detects the actual GPS position and obtains the allowed local speed limit of that position in a USB or flash memory, which is then displayed using a speed limit indicator in the scale of the speedometer of the instrument cluster in one mode of operation when the speed limit has not been reached, or in a second mode of operation when the speed limit has been reached or surpassed. The driver does not have to look at the street to see the allowed driving speed because the instrument cluster always provides an indication of the local speed limit.