Refuse Vehicle Lifting Mechanism Safety Sensor Control
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Solution Overview
Problem
The operation of front-end loading refuse collection vehicles can be complex and dangerous, particularly when lifting and lowering large and heavy bins, as operators must focus on the bin's movement, potentially leading to accidental injuries from nearby objects or persons.
Innovation Solution
A safety system equipped with at least two sensors mounted strategically around the vehicle to detect objects or persons in the vicinity, communicating with the lifting operation system to prevent lowering when a danger zone is occupied and providing warnings for detected objects in a warning zone, ensuring safe operation by controlling the lifting mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual control of the lifting mechanism is used, then the operator can observe and control the bin's movement, but the operator's attention is focused on the bin rather than the surrounding environment, creating safety hazards
Solution Approach 1:
The patent replaces manual mechanical control with an automated lifting mechanism controlled by a control unit. The automated system receives control signals to move the lifting mechanism between lowered and raised positions, eliminating the need for continuous manual operation while maintaining controlled movement. This substitution reduces operator workload and allows attention to be directed toward safety monitoring.
Solution Approach 2:
The patent implements a safety system with sensors that continuously monitor the environment and provide feedback to the control unit. The sensors detect objects or persons in the vicinity, and the control unit receives this information to automatically control the lifting mechanism's operation. This feedback loop enables automated safety monitoring without requiring constant operator attention to the surrounding environment.
2Reliability
If sensors are mounted close to the vehicle centreline, then the field of view is limited, but mounting them further away increases the monitored area and safety coverage
Solution Approach 1:
The patent positions sensors at a lateral distance of at least 800 mm from the vehicle's longitudinal centreline, utilizing the lateral dimension to expand the monitored area. This spatial arrangement allows the sensors to cover a broader field of view including areas under the lifting mechanism arms, transforming a potential blind spot into a monitored zone and enhancing overall safety coverage.
3Reliability
If the lifting mechanism is automatically controlled, then operator safety is improved, but the system complexity increases due to additional sensors and control systems
Solution Approach 1:
The control unit serves multiple functions: it controls the lifting mechanism movement in response to control signals and simultaneously receives sensor data to automatically control the lifting operation. This multi-functionality consolidates control and safety monitoring into a single system, reducing overall system complexity while maintaining automated safety features.
Solution Approach 2:
The patent merges the lifting control function and safety monitoring function into an integrated system. The control unit that manages lifting mechanism operation also processes sensor information and implements safety control, combining what could be separate systems into one unified control architecture, thereby managing complexity while achieving both automation and safety.
Data Source
AI summary
The invention provides a safety system for use with a refuse collection vehicle having a refuse storage body and a front cabin, the system operating to detect the presence of an object or person in the vicinity of the vehicle and communicate with a lifting operation system. The vehicle has a lifting mechanism for engagement with a refuse bin, the lifting operation system operable to move the lifting mechanism between a lowered position at which the bin is on the ground in front of the vehicle and a raised position for discharge of the bin contents into the interior of the refuse storage body. The safety system including one or more sensors able to monitor an area in the vicinity of the vehicle where the lifting mechanism lifts and lowers bins and a controller operative to receive input data from said at least two sensors and process said data to determine the presence of an object or person, the controller operative to control functioning of the lifting operation system in accordance with the determination by the controller. The invention further provides a vehicle incorporating such a safety system, such as a front loading refuse collection vehicle.