Vehicle Obstruction Warning System Using Sensor Clearance Comparison
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Solution Overview
Problem
Vehicle operators face difficulties in determining whether clearance height and width are sufficient to pass under or through structures like overpasses and bridges, especially in inadequately signed areas or under uneven road conditions, particularly at night, leading to potential vehicle damage and occupant injury.
Innovation Solution
A system that uses sensors to obtain and compare vehicle clearance data with obstruction data, generating warnings and automatically stopping the vehicle if necessary, to prevent collisions by monitoring the operator's response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driver relies on visual estimation to gauge clearance height and width, then the system remains simple and requires no additional equipment, but the driver cannot accurately determine sufficient clearance especially under poor visibility conditions
Solution Approach 1:
The patent replaces the mechanical/visual estimation method with an optical sensing system using sensors to detect obstruction clearance. This substitution enables precise measurement of clearance height and width without relying on driver visual judgment, directly resolving the contradiction between measurement accuracy and system simplicity by introducing automated optical detection.
Solution Approach 2:
The patent introduces sensors as an intermediary device between the driver and the obstruction. The sensors act as a mediator that captures clearance data and transmits it to the control unit, which then processes the information and provides warnings to the driver. This intermediary system enables accurate clearance detection while keeping the driver interface simple.
2Reliability
If the system provides only warning signals to the operator, then the system remains relatively simple, but collision cannot be prevented if the operator fails to respond timely
Solution Approach 1:
The patent implements a feedback mechanism where the sensor continuously monitors clearance conditions and provides real-time feedback to the control unit. When clearance becomes insufficient, the system generates warning signals to the operator. This feedback loop enables the system to respond dynamically to changing conditions, improving collision prevention reliability while maintaining manageable system complexity through standardized feedback protocols.
Solution Approach 2:
The system incorporates automatic braking capability that can activate without continuous operator intervention. Once the warning is issued and the operator fails to respond within a predetermined time, the system automatically applies brakes to prevent collision. This self-service feature enhances reliability by providing a backup safety mechanism that operates independently of operator response.
3Measurement precision
If the system scans and processes clearance data continuously, then detection accuracy is maximized, but energy consumption increases
Solution Approach 1:
The patent employs periodic scanning of clearance data rather than continuous scanning. The sensor device scans obstruction clearance at regular intervals, and the control unit processes data based on these periodic measurements. This periodic action maintains adequate detection accuracy for safety purposes while significantly reducing energy consumption compared to continuous scanning, directly resolving the contradiction between measurement precision and energy use.
Data Source
AI summary
A system and method for warning vehicle operators of obstructions are provided. First clearance data of the vehicle, including vehicle height and width, are obtained and stored in memory. An obstruction in the vehicle's path and the travel surface between the vehicle and the obstruction are scanned by a sensor device. Second clearance data of the obstruction, including the height and width of the vehicle passage defined by the obstruction, are determined and are stored in memory. Utilizing a comparison/warning signal generating device, the first and second clearance data are compared, and a warning signal is generated when values of the first clearance data are equal to or greater than corresponding values of the second clearance data. A monitoring device monitors the time period between generation of the warning signal and responsive action by the vehicle operator to avoid a collision. The vehicle is automatically brought to a stop if, upon expiration of a preselected time limit, the vehicle operator has not taken appropriate action.