Rotatable Carrier Ejects Road Markers via Centrifugal Force
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Solution Overview
Problem
The existing methods for placing Raised Retroreflective Pavement Markers on roadways are inefficient and hazardous due to manual operation, which increases costs and risks, and previous automation attempts have been unreliable, costly, or overly complex, failing to account for environmental variations and marker size/shape differences.
Innovation Solution
A road marker placement system that includes a frame attached to a vehicle, a holder for road markers, and a rotatable carrier driven by a drive system, which ejects markers onto an adhesive surface with precision using centrifugal force and gravity, ensuring accurate placement without slowing the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual placement method is used, then the operator can place markers with some control, but the operator safety deteriorates and installation cost increases
Solution Approach 1:
The patent replaces the manual mechanical placement system with an automated mechanical system mounted on a vehicle. The automated marker placement mechanism includes a marker holder, dispensing mechanism, and adhesive application system that work together to place markers without human operators being exposed to traffic hazards, thereby resolving the safety contradiction while maintaining placement control.
Solution Approach 2:
The patent introduces a vehicle-mounted automated placement system as an intermediary between the operator and the road surface. This intermediary system performs the dangerous task of placing markers on active roadways, eliminating the need for operators to work directly in traffic while still achieving precise marker placement through the automated mechanism.
2Ease of operation
If manual placement method is used, then the operator can apply adhesive and place markers, but the installation time increases and productivity decreases
Solution Approach 1:
The patent implements continuous operation by mounting the automated marker placement system on a moving vehicle. The system can continuously dispense markers and apply adhesive as the vehicle moves along the roadway, eliminating the stopping and starting inherent in manual placement methods. This continuous action significantly increases productivity while maintaining placement capability through the automated mechanism.
Solution Approach 2:
The patent replaces the slow manual mechanical process with an automated mechanical system that operates continuously from a moving vehicle. The automated dispensing mechanism can place multiple markers per second without the delays associated with manual adhesive application and marker placement, thereby resolving the productivity contradiction.
3Productivity
If automated placement system is implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The patent designs a universal marker placement system that can handle multiple types of markers (different sizes, shapes, and orientations) using the same basic mechanism. The system includes adjustable components and programmable controls that allow it to adapt to different marker specifications without requiring completely different hardware, thereby achieving high productivity while controlling complexity through multi-functionality.
Solution Approach 2:
The patent implements self-service features in the automated placement system, including automatic adhesive application, automatic marker orientation adjustment, and self-calibration capabilities. These self-service functions reduce the need for complex external control systems and manual intervention, thereby increasing productivity while keeping the overall system complexity manageable.
4Productivity
If automated placement system is implemented, then installation cost decreases, but reliability deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms in the automated placement system, including sensors that detect marker placement accuracy, adhesive application quality, and system component status. This feedback is used by the control system to make real-time adjustments, ensuring reliable and accurate marker placement while maintaining high productivity. The feedback loops compensate for variations in vehicle speed, surface conditions, and component wear.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables high-precision, automated placement of road markers, reducing installation time and risk while accommodating various marker sizes and shapes, and functioning effectively in different environmental conditions.
Implementation Method 1
The rotatable carrier is rotated by the drive system in a first direction from the first position to a second position that is facing the road surface such that the road marker held in the first pocket is forced at least by gravity and by centrifugal force of the rotating rotatable carrier to be ejected from the first pocket onto an adhesive material located on the road surface.
Implementation Method 2
The rotatable carrier is rotated by the drive system in a first direction from the first position to a second position that is facing the road surface such that the road marker held in the first pocket is forced at least by gravity and by centrifugal force of the rotating rotatable carrier to be ejected from the first pocket onto an adhesive material located on the road surface.
Data Source
AI summary
A road marker placement system has a frame, a holder mechanically coupled to the frame, a drive system mechanically coupled to the frame, and a rotatable carrier mechanically coupled to the drive system to allow the rotatable carrier to be rotationally driven by the drive system. The rotatable carrier has at least a first pocket formed therein that receives one of the road markers dispensed from an opening of the holder when the rotatable carrier is in a first position. The rotatable carrier is rotated by the drive system from the first position to a second position that is facing the road surface such that the road marker held in the first pocket is forced at least by gravity and by centrifugal force of the rotating rotatable carrier to be ejected from the first pocket onto an adhesive material located on the road surface.