Tree Cutting Guidance Using First-Cut Path Precalculation

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Solution Overview

Problem

During tree cutting sequences, forestry workers face challenges in ensuring safety and preventing undesired damage to the tree, such as incorrect cutting techniques leading to unintended tree fall or injury, due to the complexity of determining the ideal cutting course.

Innovation Solution

A method and system that automatically identify the course of the first cut, precalculate the ideal course of the second cut based on the first cut, and output cutting information to guide the execution of the second cut, using a combination of identification devices like cameras, inertial measurement units, and output devices like displays and vibration systems, to improve safety and prevent damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual cutting techniques are used by forestry workers, then operational flexibility is maintained, but safety and precision of cutting are compromised

Engineering Contradiction:
ImprovesafetyVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces an intermediary system consisting of identification devices, precalculation devices, and output devices that mediates between the worker and the tree. This intermediary provides cutting information without replacing the worker, thus improving safety while maintaining operational flexibility and avoiding excessive complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system enables self-service by allowing the cutting apparatus to identify its own position and orientation, automatically determine the ideal cutting course, and provide guidance information. This reduces the cognitive burden on the worker while maintaining safety without requiring complex external control systems.

Inventive Principle:
Principle #25Self-service

2Manufacturing precision

If complex precalculation systems are implemented to determine ideal cutting courses, then cutting precision is improved, but system complexity and cost increase

Engineering Contradiction:
Improvecutting precisionVSAvoidsystem complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by precalculating the ideal cutting course before the actual cutting operation. The precalculation device determines the optimal path based on identified cutting parameters, enabling precise cutting without requiring complex real-time control systems during the actual cutting process.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system replaces complex mechanical measurement and calculation methods with electronic identification devices and computational algorithms. This substitution achieves high cutting precision while reducing physical system complexity compared to traditional mechanical measurement approaches.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If automated identification and precalculation systems are used, then cutting accuracy is enhanced, but ease of operation decreases

Engineering Contradiction:
Improvecutting accuracyVSAvoidease of operation
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent implements feedback by providing cutting information through output devices that guide the worker in real-time. The system continuously identifies the actual cutting course, compares it with the precalculated ideal course, and provides corrective feedback, thereby enhancing accuracy while maintaining ease of operation through intuitive guidance.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The intermediary system acts as a guide rather than a controller, providing information to the worker without removing operational control. This approach enhances cutting accuracy through automated identification and precalculation while maintaining ease of operation by keeping the worker in the loop and providing intuitive guidance.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11730093B2Method for assisting during execution of a sequence of cuttings in a tree, and system for assisting during execution of a sequence of cuttings in a tree
Publication Date: 2023.08.22 ANDREAS STIHL AG & CO KG
  • US11730093B2 patent drawing
  • US11730093B2 patent drawing

AI summary

A system assists during execution of a sequence of cuttings in a tree, wherein, during a cutting sequence, a first cut in the tree is followed by a second cut in the tree At least a part of an ideal course of the second cut depends on at least a part of a course of the first cut. An identification device identifies at least the part of the course of the first cut in the tree. A precalculation device precalculates at least the part of the ideal course of the second cut in the tree based on the identified part of the course of the first cut. An output device outputs cutting information for executing the second cut based on the precalculated part of the ideal course of the second cut.