Outdoor Camera Thermal Layout for Sensor Heating and Weather Sealing
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Solution Overview
Problem
Video surveillance cameras face challenges in maintaining temperature stability, resisting environmental exposure to rain and sunlight, and providing positional flexibility while ensuring secure and efficient operation, especially in outdoor settings where temperature fluctuations and exposure to harsh conditions are prevalent.
Innovation Solution
The development of compact all-weather camera implementations with on-camera processing, passive cooling, active heating, waterproofing, impact resistance, and wireless communication capabilities, along with features like toroidal lenses for IR illumination and a concave front face to prevent light interference, allowing for secure, efficient, and flexible camera placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the camera assembly includes high-powered processing components, then computational capability is improved, but heat generation increases which may damage heat-sensitive components
Solution Approach 1:
The camera assembly is divided into distinct thermal zones: a first region for heat-sensitive components (image sensor) and a second region for heat-generating components (processor). This spatial segmentation allows each component to operate in its optimal thermal environment, preventing heat from the processor from damaging the image sensor while maintaining high computational capability.
2Adaptability or versatility
If the camera is designed for outdoor deployment, then environmental adaptability is improved, but exposure to harsh conditions (rain, sunlight, temperature extremes) increases
Solution Approach 1:
The camera assembly employs a composite housing structure combining weather-resistant materials that provide protection against rain, sunlight, and temperature extremes. This composite construction maintains structural integrity and protective functionality across wide temperature ranges while enabling outdoor deployment capability.
Solution Approach 2:
The camera assembly includes preliminary protective measures such as waterproof seals and UV-resistant coatings applied during manufacturing. These pre-applied protective layers prevent environmental factors from damaging internal components during outdoor operation.
3Illumination intensity
If the image sensor is exposed to light from illuminators, then illumination coverage is improved, but light interference causes wash out or anomalies in captured images
Solution Approach 1:
The housing structure incorporates localized light-blocking features positioned between the illuminators and image sensor. These features create selective light paths that allow illumination to reach the external scene while preventing direct light from entering the image sensor, thus maintaining both illumination effectiveness and image quality.
4Volume of moving object
If the camera assembly is made compact, then form factor is improved, but heat dissipation capability is reduced
Solution Approach 1:
The camera assembly utilizes vertical stacking and multi-layer PCB design to arrange heat-generating and heat-sensitive components in different spatial dimensions. This dimensional arrangement allows adequate thermal separation and heat dissipation pathways within a compact form factor, preventing overheating while maintaining small size.
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
These cameras maintain image sensor temperature stability, resist environmental exposure, and provide flexible positioning and secure operation, ensuring high-quality video capture and transmission even in harsh conditions.
Implementation Method 1
a heating component coupled to the image sensor, the heating component configured to continuously maintain the image sensor at a temperature above a threshold temperature
Implementation Method 2
a concave front face positioned in front of the image sensor such that light from the scene passes through the front face prior to entering the image sensor
Data Source
AI summary
The various implementations described herein include a video camera assembly that includes: (1) a housing; (2) an image sensor encased in the housing and configured to capture activity of the smart home environment; (3) a wireless radio configured to transmit video frames captured by the image sensor to an electronic device via a remote server; (4) at least one infrared transmitter configured to selectively illuminate the smart home environment; (5) one or more circuit boards encased in the housing, the one or more circuit boards including at least one processor mounted thereon; and (6) a heating component coupled to the image sensor, the heating component configured to continuously maintain the image sensor at a temperature above a threshold temperature while the image sensor is capturing the activity of the smart home environment.