Floor Cleaning Machine Obstacle Sensing for Collision Prevention
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Solution Overview
Problem
Floor care machines are frequently damaged due to collisions with obstacles caused by inexperienced or careless operators who fail to slow down the machines in time.
Innovation Solution
A floor cleaning machine equipped with obstacle sensors and a processor that detects approaching obstacles, alerts the operator, and overrides the operator's command to reduce speed or stop the machine to prevent collisions, using a combination of sensors and speed controllers to determine the necessary actions based on distance and direction of movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machine operates at high speed under manual control, then productivity is improved, but collision damage risk increases
Solution Approach 1:
The obstacle detection system performs preliminary detection of obstacles before the machine reaches collision distance. The processor calculates time-to-collision and initiates speed reduction commands in advance, allowing the machine to maintain high productivity while preventing collisions through proactive intervention.
Solution Approach 2:
The system continuously monitors obstacle distance and machine speed, providing real-time feedback to the controller. When the calculated time-to-collision falls below the threshold, the system automatically adjusts speed, creating a closed-loop control that maintains both productivity and safety.
2Reliability
If the machine automatically reduces speed when obstacles are detected, then collision prevention is improved, but operator control authority deteriorates
Solution Approach 1:
The machine performs self-protection by automatically detecting obstacles and adjusting its own speed without requiring operator intervention. The system serves itself by monitoring its environment and taking corrective action, which prevents collisions while minimizing disruption to operator workflow.
Solution Approach 2:
The system applies preliminary anti-action by automatically counteracting potential collision risks before they materialize. When an obstacle is detected within the critical time threshold, the system preemptively reduces speed to prevent the harmful collision event, protecting both the machine and obstacles.
3Reliability
If obstacle detection range is increased, then collision prevention capability is improved, but sensor system complexity increases
Solution Approach 1:
The processor acts as an intermediary that calculates time-to-collision based on sensor data and machine speed. This computational mediator translates raw sensor measurements into meaningful collision risk assessment, enabling extended detection range without proportionally increasing system complexity through sophisticated sensor hardware.
Data Source
AI summary
A floor cleaning machine includes a set of obstacle sensors that detect when the machine is approaching an obstacle. If the obstacle is less than a threshold distance away from the machine, the machine may output an alert and override the operator's command with a command to reduce the speed of the machine. If the obstacle is less than a minimum threshold distance away from the machine, the machine may come to a complete stop to prevent the collision.