Autonomous Crop-Row Navigation With Adaptive Laser Curtain Safety

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Solution Overview

Problem

Agricultural tasks, particularly in soft fruit crops, often require time-consuming manual labor, and existing autonomous machinery poses safety risks due to its movement around crops, necessitating a solution for safe and efficient autonomous operation.

Innovation Solution

A mobile autonomous agricultural system equipped with a powered mobile unit, laser curtain sensors, a location module, and a safety module that dynamically adjusts a laser curtain pattern based on the unit's location relative to crop rows to prevent collisions and ensure safety by controlling the unit's movement and robot arms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If autonomous machinery moves around crops to perform agricultural tasks, then productivity and labor efficiency are improved, but safety risks to people working in or around the crops increase

Engineering Contradiction:
Improveagricultural task efficiencyVSAvoidsafety risk to people
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary safety assessment by evaluating the autonomous unit's location relative to crop rows and predicting potential collision risks before movement occurs. The safety module proactively identifies hazardous situations by analyzing location data and laser curtain patterns, enabling preventive action rather than reactive response.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary safety module that acts as a mediator between the autonomous unit's movement control and the physical environment. This safety module processes location information and laser curtain data to generate safety outputs, serving as a buffer that prevents direct harmful interactions between the autonomous machinery and people or crops.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If laser curtain sensors are used to detect obstacles and ensure safety, then safety is improved, but device complexity increases

Engineering Contradiction:
Improvecollision avoidance capabilityVSAvoidsystem component complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The laser curtain sensors serve multiple functions: they detect obstacles, define safe operating zones, and provide spatial reference information for navigation. By making the safety system multi-functional, the patent reduces the need for separate specialized components, thereby managing complexity while maintaining high reliability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The autonomous unit performs self-safety assessment by using its own location module and laser curtain sensors to evaluate its environment and detect potential hazards. The system serves its own safety needs through integrated sensing and processing, reducing the requirement for external safety monitoring equipment.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively reduces the risk of accidents by autonomously navigating around crops while maintaining safety for people nearby, enhancing operational efficiency and compliance with safety regulations.

Implementation Method 1

at least one laser curtain sensor configured to project a laser curtain away from the mobile unit

Methodology Applied
Scientific EffectLaser: Laser

Data Source

PatentEP4140288B1A mobile autonomous agricultural system and method
Publication Date: 2024.10.02 S&A GRP HLDG LTD
  • EP4140288B1 patent drawingFigure 1
  • EP4140288B1 patent drawingFigure 2
  • EP4140288B1 patent drawingFigure 3

AI summary

There is provided a mobile autonomous agricultural system (10) comprising: a powered mobile unit (12) for carrying agricultural equipment (22), and configured to move along rows (40) of crops; at least one laser curtain sensor (18) configured to project a laser curtain away from the mobile unit (12); a location module (24) configured to monitor a location of the mobile unit (12) relative to a row (40); a controller (20) configured to control the travel of the mobile unit (12); a safety module (26) configured to: receive a location signal from the location module (24) related to the location of the mobile unit (12) relative to a row (40), select a mode of operation to process the laser curtain in a predefined laser curtain pattern, based on the received location signal, each mode of operation corresponding to a different predefined laser curtain pattern, and to generate a safety output in response to determining that the laser curtain is interrupted within the laser curtain pattern.