Refuse Vehicle Lift Alignment Using Projected Target Lighting
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Solution Overview
Problem
Refuse vehicles face inefficiencies due to the time-consuming process of aligning the lifting mechanism with waste containers, often requiring manual adjustments and imperfect visual alignment, which wastes time and reduces operational efficiency.
Innovation Solution
The integration of a projector that emits light to define a target area for waste container placement, combined with a camera system and display to provide visual cues for operators, allowing precise alignment and streamlined waste collection without the need for additional movement between the vehicle and container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual alignment methods are used to position waste containers relative to the lifting mechanism, then operators can perform waste collection without additional equipment, but significant time is spent on alignment adjustments and visual estimation reduces precision
Solution Approach 1:
A projector is introduced as an intermediary device that projects light onto the ground to create visual guides (crosshairs and target area indicators) that mediate between the operator and the waste container positioning task. This intermediary provides precise alignment references without requiring direct manual measurement or complex instrumentation.
Solution Approach 2:
The system uses different colored lights (red, yellow, green) to indicate different alignment states and guide the operator. The color changes provide immediate visual feedback about the positioning accuracy and readiness for waste collection, replacing time-consuming manual assessment with intuitive color-coded signals.
2Measurement precision
If operators exit the cab to manually position waste containers, then precise alignment can be achieved, but operator safety is compromised and time is lost
Solution Approach 1:
A camera mounted on the lifting mechanism provides real-time visual feedback to the operator inside the cab, showing the relative position of the waste container and the target area. This feedback loop enables precise positioning decisions to be made from within the protected cab environment, eliminating the need for operators to exit and exposing themselves to hazards.
Solution Approach 2:
The camera creates a visual copy (image feed) of the external scene and displays it inside the cab on a monitor. This copy allows the operator to see and assess the alignment situation without physically being in the hazardous external environment, maintaining both safety and positioning precision.
3Adaptability or versatility
If additional movement between the vehicle and container is permitted during alignment, then flexibility in positioning is improved, but the complexity of the alignment process increases and time is wasted
Solution Approach 1:
The projector pre-establishes the target area and alignment references on the ground before the waste collection process begins. By preparing these visual guides in advance, the system eliminates the need for complex real-time adjustments and movements, simplifying the alignment process while maintaining flexibility.
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
This solution significantly reduces the time spent aligning the vehicle with waste containers, increases operational efficiency, and results in cost savings by minimizing manual adjustments and preventing errors, while ensuring safer operations by keeping operators within the cab.
Implementation Method 1
The projector is positioned to emit light outwardly away from the refuse vehicle and proximate the lift assembly to define a target area
Data Source
AI summary
A refuse vehicle includes a chassis, a vehicle body supported by the chassis, a lift assembly, and a projector. The vehicle body defines a receptacle for storing refuse. The lift assembly is configured to selectively engage a waste container. The lift assembly is movable between a first position and a second position. The projector is positioned to emit light outwardly away from the refuse vehicle and proximate the lift assembly to define a target area.