Cab Camera Array for Operator Face Detection
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Solution Overview
Problem
Construction machines often face challenges in capturing images of an operator's face parts due to the operator not always facing forward, which can lead to malfunctions and safety issues.
Innovation Solution
A construction machine equipped with a lower travel body, an upper slewing body, a cab, and a space recognition device on a pillar, featuring multiple imaging devices positioned to capture the operator's face from both sides, ensuring consistent image capture regardless of the operator's orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single camera is disposed to capture operator images, then the device complexity is low, but the operator's face parts cannot be captured when the operator does not face forward
Solution Approach 1:
The single camera system is segmented into multiple cameras disposed at different positions (front, rear, left, right sides of the cab). Each camera captures images from its specific viewpoint, and the system segments the monitoring task across multiple devices to ensure comprehensive coverage regardless of operator orientation.
Solution Approach 2:
The system transitions from a single-point (one camera) to multi-point (multiple cameras at different spatial positions) monitoring. By adding spatial dimensions to the camera arrangement, the system captures images from front, rear, left, and right sides, ensuring the operator's face is captured from at least one viewpoint at all times.
2Reliability
If multiple cameras are disposed to capture operator face from different positions, then the operator's face can be captured regardless of orientation, but the device complexity increases
Solution Approach 1:
Each camera is designed to serve multiple functions: capturing operator face images, monitoring operator posture, and detecting operator state. The imaging devices perform universal monitoring tasks across different operational scenarios, reducing the need for specialized sensors for each function.
Solution Approach 2:
The system uses multiple copies of imaging devices (cameras) positioned at different locations. Instead of using a single complex sensor, the patent employs simpler camera copies at front, rear, left, and right positions, each performing the same basic imaging function but covering different spatial zones.
3Reliability
If cameras are disposed on the cab, then operator images can be captured, but the cab structure becomes more complex
Solution Approach 1:
The imaging devices are merged with the cab structure by disposing cameras on the front, rear, left, and right sides of the cab. The cameras are integrated into the existing cab architecture rather than being added as separate external components, combining the monitoring function with the structural elements.
Solution Approach 2:
Each camera is positioned at a specific local position on the cab (front, rear, left, right sides) to capture images from that particular viewpoint. The local quality of each imaging position is optimized for its specific orientation, with each camera configured to monitor the operator from its designated location.
Data Source
AI summary
A construction machine includes a lower travel body, an upper slewing body mounted on the lower travel body in a slewable manner, a cab mounted on the upper slewing body, and a space recognition device disposed on a pillar in the cab.