Multi-Blade Lawn Mower Phase Control for Quieter Cutting
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Solution Overview
Problem
Existing lawn mowers with multiple blades lack accurate rotational control, leading to inefficiencies such as uneven cutting, increased power consumption, and noise due to blade interference.
Innovation Solution
A lawn mower with multiple blades equipped with rotational position sensors and processors that control the motors to maintain a predetermined phase relationship between adjacent blades, ensuring synchronized rotation and minimizing blade interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple blades rotate without phase control, then the structure is simple, but cutting accuracy deteriorates due to blade interference
Solution Approach 1:
The patent implements feedback control by using rotational position sensors to detect the actual rotational positions of multiple blades and feeding this information back to the control unit. The control unit then adjusts the rotational speeds of individual blades based on their detected positions to maintain the predetermined phase relationship, thereby achieving accurate cutting while managing system complexity through intelligent control.
Solution Approach 2:
The patent changes the rotational speed parameters of individual blades dynamically to maintain the predetermined phase relationship. By adjusting the rotational speeds of blades based on their positional feedback, the system achieves precise cutting accuracy while adapting parameters in real-time to prevent blade interference.
2Use of energy by moving object
If multiple blades rotate without phase control, then the device is simple to operate, but power consumption increases due to blade interference
Solution Approach 1:
The control system continuously monitors the rotational positions of all blades through sensors and adjusts their speeds in real-time to maintain optimal phase relationships. This feedback mechanism eliminates blade interference that would otherwise cause energy waste, reducing power consumption while managing operational complexity through automated control.
Solution Approach 2:
The system dynamically changes the rotational speed parameters of individual blades to maintain the predetermined phase relationship, optimizing energy efficiency by preventing blade interference. This parameter adjustment is performed automatically by the control unit based on sensor feedback, reducing power consumption without requiring manual intervention.
3Object-affected harmful factors
If multiple blades rotate without phase control, then the structure is simple, but noise increases due to blade interference
Solution Approach 1:
The patent uses rotational position sensors to detect blade positions and feeds this information back to the control unit, which adjusts individual blade speeds to maintain the predetermined phase relationship. This feedback control prevents blade interference that generates noise, thereby reducing noise levels while managing system complexity through intelligent automated control.
Solution Approach 2:
The system dynamically adjusts the rotational speed parameters of blades to maintain optimal phase relationships, preventing the interference that causes noise. By changing these parameters in real-time based on sensor feedback, the system achieves quiet operation while managing complexity through automated control mechanisms.
4Manufacturing precision
If rotational position sensors and phase control are implemented, then cutting accuracy improves, but device complexity increases
Solution Approach 1:
The patent implements feedback control using rotational position sensors to detect blade positions and feed this information back to the control unit. This enables precise rotational control of multiple blades while managing system complexity through intelligent automated adjustment of rotational speeds based on detected positions.
Solution Approach 2:
The patent replaces complex mechanical synchronization mechanisms with an electronic control system that uses sensors and processors to manage blade rotation. This substitution of mechanical systems with electronic control achieves high rotational control accuracy while managing overall system complexity through software-based solutions.
Data Source
AI summary
A lawn mower controls a plurality of motors to rotationally drive a plurality of blades in a manner so that the blades rotate while a phase relationship between the vane portions of mutually adjacent blades, from among the plurality of blades, is maintained at a predetermined phase angle.