Autonomous Lawn Mower Sensor Podium for Coverage and Emergency Stop
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Solution Overview
Problem
Autonomous systems face limitations in sensor coverage and safety, particularly in hybrid systems that compromise manual control for autonomous operation, lacking effective user alerts and emergency stop capabilities.
Innovation Solution
The autonomous lawn mower incorporates a sensor suite mounted on a podium for optimal viewing, communication channels for status updates, and a 360-degree LED indicator for situational awareness, along with an emergency control system and modular design for calibration and sensor integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the system is optimized for manual control, then ease of operation is improved, but sensor coverage deteriorates
Solution Approach 1:
The system integrates multiple sensor types (cameras, LIDAR, ultrasonic sensors, GPS) that serve both manual control assistance and autonomous operation functions. The sensor suite is designed to be universally applicable across different operational modes, providing comprehensive environmental awareness whether the operator is manually controlling or the system is operating autonomously.
Solution Approach 2:
The system dynamically adjusts sensor activation and processing based on operational mode. During manual control, certain sensors are activated to assist the operator, while during autonomous operation, the full sensor suite is engaged. This dynamic configuration ensures optimal sensor coverage for each mode without permanently compromising either manual operation ease or autonomous reliability.
2Extent of automation
If the system is optimized for autonomous operation, then extent of automation is improved, but sensor coverage deteriorates
Solution Approach 1:
The autonomous system is segmented into independent functional modules (navigation, obstacle detection, cutting control, communication) each with dedicated sensors. This segmentation allows the system to allocate sensor resources efficiently across different autonomous functions while maintaining comprehensive coverage. Each module can operate with its specialized sensors, reducing overall system complexity while improving autonomous capability.
3Reliability
If emergency stop capabilities are added, then safety is improved, but device complexity is worsened
Solution Approach 1:
The emergency stop system operates autonomously through sensor-triggered safety protocols. When sensors detect hazardous conditions (obstacles, operator presence, system failures), the emergency stop is automatically activated without requiring additional manual intervention systems. This self-service approach enhances safety while minimizing the complexity of manual emergency control interfaces.
Solution Approach 2:
The system incorporates continuous feedback loops where sensors monitor operational conditions and automatically trigger emergency stop protocols when safety thresholds are exceeded. This feedback-based safety system provides comprehensive protection through existing sensor-actuator loops, avoiding the need for separate complex emergency control hardware while maintaining high safety standards.
4Reliability
If user alerting capabilities are added, then safety is improved, but device complexity is worsened
Solution Approach 1:
The communication system uses multi-functional components that serve both operational control and user alerting purposes. The same communication modules used for transmitting control commands also handle safety alerts and status notifications. This universal communication infrastructure provides comprehensive user alerting capabilities without requiring separate dedicated alerting hardware, thereby reducing overall system complexity.
Data Source
AI summary
An autonomous lawn mower is described. The autonomous lawn mower comprises a chassis supporting a podium that is raked forward with respect to a horizontal plane. In some examples, the podium comprises a top portion that may support one or more sensors, antennas and/or cameras that may be used to provide environmental information regarding the surroundings of the autonomous lawn mower. In additional or alternative examples, the podium may facilitate communication services to and/or from the autonomous lawn mower. Such a podium may improve the operation of the mower by a user when manually (or semi-autonomously controlled) while optimizing a field of view of such sensors with respect to the mowable area.