Ridable Mower Grass Detection Control Logic
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Solution Overview
Problem
Existing mower machines face issues with hydraulic hose damage during travel, gaps in grass collection ducts leading to grass discharge, and inaccurate cut grass full-state detection due to vibration, resulting in erroneous alarms or missed full-state notifications.
Innovation Solution
A cut grass full-state detection apparatus comprising a cut grass amount detection unit, a notification unit, and a control unit that measures a time period for continuous detection of a predetermined amount of cut grass, issuing alarms based on the mower's driving status to prevent erroneous notifications and ensure accurate full-state detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple amount detection unit is used to detect cut grass quantity, then the device complexity is reduced, but measurement precision deteriorates due to vibration causing erroneous detection results
Solution Approach 1:
The control unit stores detection results in memory and performs continuous monitoring before issuing alarms. By preparing detection data in advance and comparing multiple consecutive readings, the system filters out vibration-induced erroneous signals while maintaining a simple detection structure.
Solution Approach 2:
The control unit continuously monitors detection results and compares them against stored values in memory. When a predetermined amount is continuously detected for a specified time period, the system issues an alarm. This feedback mechanism eliminates false alarms caused by temporary vibration while preserving measurement accuracy.
2Productivity
If alarm notification is issued immediately upon detecting predetermined amount of cut grass, then productivity is improved by timely notification, but reliability deteriorates due to erroneous alarms caused by vibration
Solution Approach 1:
The control unit stores detection results in memory and performs continuous monitoring before issuing alarms. By preparing detection data in advance and comparing multiple consecutive readings, the system filters out vibration-induced erroneous signals while maintaining a simple detection structure.
Solution Approach 2:
The control unit continuously monitors detection results and compares them against stored values in memory. When a predetermined amount is continuously detected for a specified time period, the system issues an alarm. This feedback mechanism eliminates false alarms caused by temporary vibration while preserving measurement accuracy.
3Measurement precision
If the grass collecting container is continuously monitored without time-based filtering, then measurement precision is maintained, but loss of time increases due to unnecessary alarm responses
Solution Approach 1:
The control unit checks detection results at regular intervals and compares consecutive readings. By implementing periodic verification with a predetermined time period threshold, the system maintains accurate full-state detection while filtering out transient false signals that would require unnecessary operator intervention.
Data Source
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AI summary
A ridable mower machine includes: a mower (7); a grass collecting container (9) configured to collect cut grass from the mower; a linkage mechanism (10) that includes a plurality of linkage members (21, 22), and supports the grass collecting container such that the grass collecting container can be lifted and lowered, and opened and closed; a hydraulic actuator configured to drive the grass collecting container; a hydraulic hose that is provided along a linkage member and is connected to the hydraulic actuator; and a cover (3)1 that covers a portion that extends along the linkage member, of the hydraulic hose.