Self-Moving Machine Turning Path to Prevent Grass Torsion

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Solution Overview

Problem

Existing self-moving machines, such as lawn mowers, experience poor turning control effects when turning around their own center, leading to irreversible damage to grass and inefficient path navigation.

Innovation Solution

A turning control method and device for self-moving machines that involves acquiring a whole area, determining an initial turning point, controlling the machine to move back to a target turning point, and then turning at that point according to a preset path to reach a target point, thereby improving turning efficiency and minimizing grass damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the self-moving machine turns around its own center, then the turning control is simple, but the grass is twisted off and damaged due to large torsion

Engineering Contradiction:

Improveturning control simplicityVSAvoidgrass damage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

Instead of turning around the machine's own center, the patent inverts the turning approach by having the machine move backward to a predetermined turning point first, then turn. This reverses the conventional turning sequence and eliminates the large torsion that damages grass during center-based turning.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent applies preliminary action by having the machine move backward to a predetermined turning point before executing the turn. This preparatory movement positions the machine optimally, reducing torsion on the grass during the actual turning operation.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If the self-moving machine turns around its own center, then the turning maneuver is quick, but the turning effect is poor and grass is damaged

Engineering Contradiction:

Improveturning timeVSAvoidgrass damage

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The machine performs a preliminary backward movement to a predetermined turning point before turning. This preliminary positioning reduces the torsion applied to grass during turning, preventing damage while maintaining efficient path navigation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent inverts the conventional turning sequence by moving backward first to a turning point, then turning, rather than turning immediately around the center. This inverted approach prevents grass damage while achieving effective turning.

Inventive Principle:

Principle #13The other way round (Inversion)

3Stability of the object's composition

If the self-moving machine uses a large front area, then the machine is stable, but the resistance of grass is large causing torsion during turning

Engineering Contradiction:

Improvemachine stabilityVSAvoidgrass torsion

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The machine moves backward to a predetermined turning point before turning. This preliminary positioning reduces the torsion force applied to the grass during turning, preventing damage while maintaining the stability provided by the large front area.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By inverting the turning sequence to move backward first, the patent reduces the harmful torsion effect on grass caused by the large front area, while preserving the stability benefits of the machine design.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20250081883A1Turning control method for self-moving machine and self-moving machine

Publication Date: 2025.03.13 SHENZHEN HANYANG TECH CO LTD

AI summary

A turning control method of a self-moving machine includes the following steps: acquiring a whole area where the self-moving machine moves; determining an initial turning point based on the whole area; when the self-moving machine reaches the initial turning point, controlling the self-moving machine to move back to a target turning point; and controlling the self-moving machine to turn at the target turning point according to a preset turning path to reach a target point in the whole area.