Mower Deck Position Sensing for Uneven Cut Prevention
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Solution Overview
Problem
Conventional lawn mowers often experience misalignment of the mower deck due to use, leading to uneven cuts, which existing technologies fail to address effectively.
Innovation Solution
A lawn tractor equipped with position sensors attached to the mower deck and chassis, which sense three-axis rotational positions and provide real-time feedback to the operator via a dashboard or wireless device, allowing for manual or automated adjustments to maintain proper alignment, and also monitor tire pressure to alert and correct underinflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mower deck position is not monitored, then the device complexity is reduced, but the manufacturing precision deteriorates due to misalignment
Solution Approach 1:
The patent replaces complex mechanical alignment monitoring systems with electronic sensors (accelerometers, gyroscopes, magnetometers) that digitally measure deck position and orientation. This substitution reduces mechanical complexity while improving alignment precision through electronic detection and processing.
Solution Approach 2:
The patent introduces position sensors as intermediary devices between the mower deck and the operator. These sensors act as mediators that convert physical deck position into electrical signals, enabling indirect measurement and monitoring without direct mechanical contact or complex linkages.
2Measurement precision
If position sensors are installed on the mower deck, then the measurement precision of deck alignment is improved, but the device complexity increases
Solution Approach 1:
The patent employs multi-functional sensors that simultaneously perform multiple tasks: detecting deck position, monitoring orientation, and providing alignment data. This multi-functionality reduces the need for separate specialized sensors, thereby improving measurement precision without proportionally increasing system complexity.
Solution Approach 2:
The patent combines multiple sensing capabilities (acceleration, gyration, magnetism) into an integrated sensor assembly mounted on the mower deck. This merging of functions into a single coordinated system improves measurement precision while managing complexity through unified sensor architecture and shared processing.
3Productivity
If real-time feedback is provided to the operator, then the productivity of alignment adjustment is improved, but the use of energy increases due to continuous monitoring
Solution Approach 1:
The patent implements periodic sampling of sensor data rather than truly continuous monitoring. The system takes measurements at regular intervals sufficient to detect alignment changes during normal operation, providing real-time feedback capability while reducing energy consumption by keeping sensors in low-power states between measurements.
Solution Approach 2:
The patent performs preliminary alignment adjustments using the sensor feedback system before actual mowing operations begin. This allows the deck to be pre-aligned to optimal positions, reducing the need for frequent adjustments during operation and thereby reducing overall energy consumption while maintaining high productivity.
Data Source
AI summary
A lawn mowing apparatus may include sensors that are fastened to both its mower deck and its chassis. The sensors may sense a position of the mower deck in relation to the chassis. The sensed position of the mower deck may be presented to the operator via a dashboard display of the lawn tractor or transmitted via a wireless signal to another device. Based on such sensed position, an operator of the lawn tractor may manually adjust the position of the mower deck until the sensed position of the mower deck is within an acceptable operating range. In some embodiments, servomotors may used to adjust the position of the mower deck until the sensed position of the mower deck is within an acceptable range.