Window-Based Object Detection Using Optical Grating Thermal Expansion
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Solution Overview
Problem
Existing systems fail to effectively detect and identify objects near windows, particularly in structures like vehicles and buildings, which can lead to safety hazards when doors are opened or closed, as they do not accurately determine the presence of objects using temperature changes.
Innovation Solution
A window-based object detection and identification system that includes an optical grating, a light source, and a detector to acquire spectroscopic data, allowing a processor to determine temperature and identify objects based on thermal expansion, thereby preventing door collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing temperature sensing systems are used, then temperature measurement is achieved, but object detection precision is insufficient
Solution Approach 1:
The patent transforms the detection parameter from direct temperature measurement to thermal expansion measurement. By monitoring changes in the physical dimensions of the window structure caused by thermal expansion/contraction, the system achieves more precise object detection. The optical grating detects wavelength shifts that correspond to dimensional changes in the window, providing indirect but more reliable object presence information.
Solution Approach 2:
The patent introduces an intermediary detection mechanism - the optical grating - that mediates between the thermal field and the detection system. Instead of directly sensing temperature or object presence, the optical grating converts thermal expansion of the window into optical wavelength shifts, creating an indirect detection path that improves measurement precision and reliability.
2Adaptability or versatility
If simple temperature sensors are used, then system complexity is low, but object detection capability is insufficient
Solution Approach 1:
The patent makes the window structure serve multiple functions: it acts as both the structural component and the sensing element. The window's thermal expansion properties are exploited for detection purposes, allowing the same component to fulfill both structural and sensing roles. This multi-functionality reduces the need for separate dedicated sensors while enhancing detection capabilities.
Solution Approach 2:
The patent replaces traditional mechanical temperature sensing systems with an optical detection system. The optical grating uses optical wavelength measurements instead of mechanical contact sensors, enabling non-contact detection and providing more precise measurements while maintaining reasonable system complexity.
3Reliability
If no thermal expansion detection is used, then device complexity is low, but safety against door collisions is insufficient
Solution Approach 1:
The patent implements preliminary detection of object presence near the door using thermal expansion monitoring. By detecting objects before the door closes, the system can prevent collisions in advance. The optical grating continuously monitors for thermal signatures that indicate nearby objects, allowing preventive action before harmful events occur.
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 detects and identifies objects near windows, enhancing safety by preventing door collisions and reducing the risk of damage or injury by determining the presence of objects through temperature analysis.
Implementation Method 1
determining, using the optical grating, a temperature at or near the first side
Implementation Method 2
A detector can be operatively positioned to acquire spectroscopic data of the light emitted from the light source after the light has interacted with the optical grating
Data Source
AI summary
A window can be used for object detection and/or identification. The window can have a first side and a second side. An optical grating can be operatively positioned with respect to the first side of the window. A light source can be configured to emit light toward the optical grating. A detector can be operatively positioned to acquire spectroscopic data of the light emitted from the light source after the light has interacted with the optical grating. Using the optical grating, a temperature at or near the first side can be determined. Based on the temperature, it can be determined whether an object is located on the first side of the window.