Projection System With Aligned Optical Axes For Safety Detection
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Solution Overview
Problem
Existing projection systems face challenges with blind spots in safety detection systems, particularly near the projection source and reflective areas, and require adjustments whenever the projection setup changes, limiting their effectiveness in stabilizing images on non-flat or misaligned surfaces.
Innovation Solution
A projection system incorporating a Time-of-Flight (ToF) sensor or camera with an integrated detection subsystem that aligns the optical axis of the detection light source and sensor with the projection system, allowing for comprehensive detection of objects and surfaces within the projection cone, including dynamic adjustments for non-flat or moving surfaces, and providing gyroscopic stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection camera and detection source are placed nearby the projection system to detect objects in the projection cone, then safety detection capability is improved, but blind spots remain near the lens or light source where objects will not be illuminated by the detection source
Solution Approach 1:
The detection system is divided into multiple detection sources and detection cameras positioned at different locations around the projection system. Each detection source-camera pair covers a specific zone, and together they provide complete coverage of the entire projection cone without blind spots.
Solution Approach 2:
Multiple detection sources and detection cameras are combined into an integrated detection system that operates simultaneously. The detection sources are positioned to illuminate the entire projection cone, and their signals are merged and processed together to provide comprehensive safety detection.
2Loss of information
If multiple detection sources and cameras are placed around the projection source to eliminate blind spots, then detection coverage is improved, but device complexity increases
Solution Approach 1:
The detection sources are designed to serve multiple functions: they illuminate the projection cone for safety detection, and their light is also used to detect reflective objects that may redirect laser light toward viewers. This multi-functionality reduces the need for separate detection systems.
Solution Approach 2:
Instead of placing detection cameras only where direct laser light reaches, the system positions detection sources and cameras to also cover reflective areas where bounced light may reach viewers. This inverted approach to detection positioning ensures comprehensive safety coverage.
3Measurement precision
If the detection system is adjusted every time the projection setup changes to maintain detection accuracy, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The detection system automatically adapts to changes in projection setup through self-calibration. When the projection lens is changed or zoom position is adjusted, the detection system automatically recalibrates itself without requiring manual intervention, maintaining detection accuracy while simplifying operation.
Solution Approach 2:
The detection system continuously monitors the projection cone and provides feedback about detected objects and conditions. This feedback loop allows the system to automatically adjust and maintain optimal detection accuracy regardless of changes in projection setup.
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
This solution eliminates blind spots, enables precise detection and adjustment of projection parameters for various surface types, and ensures stable image projection on irregular surfaces, including those projected by drones, by dynamically warping, blending, and focusing images while maintaining safety by reducing laser intensity when necessary.
Implementation Method 1
A projection system incorporating a Time-of-Flight (ToF) sensor or camera with an integrated detection subsystem
Implementation Method 2
an integrated detection subsystem that aligns the optical axis of the detection light source and sensor with the projection system, allowing for comprehensive detection of objects and surfaces within the projection cone
Implementation Method 3
providing gyroscopic stabilization
Data Source
AI summary
A projection system including a safety detection system for a protected space, said projection system including a projection light source, a projection imaging system, a projection lens system, a detection source comprising at least of a detection light source and a detection camera comprising at least of a detection sensor, characterized by the fact that the optical axis of the projection source is identical to the optical axis of the detection source and the detection camera at least in the protected space.