Excavator Object Detection for Directional Motion Control

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing shovels uniformly restrict motion when a person or object is detected in the surroundings, lacking high reliability in preventing collisions.

Innovation Solution

A shovel equipped with an object detection device and control system that allows motion in directions away from detected objects, using actuators and sensors to manage motion based on detection spaces and operational directions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the shovel uniformly restricts motion when an object is detected, then safety is improved, but operational flexibility deteriorates

Engineering Contradiction:
ImprovesafetyVSAvoidoperational flexibility
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The motion restriction control is segmented by direction. The control device determines whether to restrict motion based on the direction of movement relative to the detected object. Motion in directions away from the detected object is allowed, while motion toward the object is restricted. This directional segmentation resolves the contradiction by maintaining safety for potentially dangerous directions while preserving operational flexibility for safe directions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different quality of motion control is applied to different spatial zones. The control device creates a restricted zone toward the detected object where motion is limited, while allowing free motion in other zones. This local differentiation enables the system to be safety-critical only where necessary (toward the object) and flexible elsewhere, resolving the uniform restriction problem.

Inventive Principle:
Principle #3Local quality

2Reliability

If the shovel restricts all motion toward detected objects, then collision prevention is improved, but productivity deteriorates

Engineering Contradiction:
Improvecollision preventionVSAvoidoperational efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The motion restriction control is dynamic and adaptive rather than static and uniform. The control device continuously monitors the detected object's position and dynamically adjusts which directions are restricted based on current operational context. This allows the system to prevent collisions when necessary while maintaining productivity by allowing motion in safe directions, resolving the contradiction between safety and efficiency.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system changes the parameter of motion restriction from a binary all-or-nothing approach to a directional gradient approach. By varying the restriction level based on direction relative to the detected object, the system maintains collision prevention for threatening directions while preserving productivity-enabling motion for non-threatening directions.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3760793B1excavator
Publication Date: 2025.10.01 SUMITOMO CONSTRUCTION MACHINERY
  • EP3760793B1 patent drawingFigure 1
  • EP3760793B1 patent drawingFigure 2
  • EP3760793B1 patent drawingFigure 3

AI summary

According to an embodiment of the present invention, a shovel (100) includes a traveling lower body (1); a revolving upper body (3) rotatably installed on the traveling lower body (1); an object detection device (70) provided on the revolving upper body (3); a controller (30) as a control device provided in the revolving upper body (3); and an actuator such as a boom cylinder (7) or the like configured to move a driven object such as a boom (4) or the like. The object detection device (70) is configured to detect an object in a detection space set in the surroundings of the shovel (100). In addition, the controller (30) is configured to allow a motion of the driven object in a direction other than a direction heading for the detected object.