Lighting Fixture Sensor Housing with Optical Seal
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Solution Overview
Problem
Traditional lighting systems, especially in public places, rely on manual switches or limited sensors, which are inconvenient and prone to failure due to environmental exposure, such as water vapor.
Innovation Solution
A light fixture design featuring a housing with adjustable light sources and sensors, including a motion sensor and an optic to seal the installation cavity, minimizing environmental exposure and allowing for adjustable output levels and activation ranges, thereby enhancing control and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors are used for intelligent control, then the lighting control capability is improved, but the reliability deteriorates due to increased exposure to environmental conditions
Solution Approach 1:
The patent introduces an optical chamber as an intermediary structure that houses the sensor while allowing it to detect external light conditions. The chamber acts as a mediator between the sensor and the external environment, enabling the sensor to perform its detection function while being protected from direct exposure to harmful environmental factors like water vapor and precipitation.
Solution Approach 2:
The patent employs a lens or transparent cover as a protective shell over the sensor. This flexible or rigid transparent barrier allows light to pass through for detection while preventing direct contact between the sensor and environmental contaminants, thus maintaining sensor reliability while preserving detection capability.
2Device complexity
If manual switches are used to control light fixtures, then the device complexity is reduced, but the ease of operation deteriorates due to required physical interaction
Solution Approach 1:
The lighting system is designed to control itself automatically based on environmental conditions detected by the sensor. The system monitors light levels, determines whether activation conditions are met, and controls the light output accordingly without requiring user intervention. This self-service approach eliminates the need for manual switches while providing convenient automatic operation.
Solution Approach 2:
The system incorporates feedback mechanisms where the sensor continuously monitors external light conditions and feeds this information back to the control system. Based on this feedback, the system automatically adjusts its operation, creating a closed-loop control system that is both simple in structure and convenient in operation.
3Measurement precision
If sensors are exposed to detect external light conditions, then the measurement precision is improved, but the object-affected harmful factors worsen due to environmental exposure
Solution Approach 1:
The optical chamber serves as an intermediary structure that enables the sensor to measure external light conditions accurately while being shielded from environmental harmful factors. The chamber design allows light to reach the sensor for precise measurement while preventing direct exposure to water vapor, precipitation, and other environmental contaminants.
Solution Approach 2:
A transparent lens or cover is used as a protective shell over the sensor. This shell maintains measurement precision by allowing light to pass through to the sensor while simultaneously protecting the sensor from environmental harmful factors, creating a barrier that preserves both detection accuracy and sensor durability.
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 solution provides convenient, reliable, and adaptable lighting control, reducing sensor exposure to environmental factors and potential failures, while allowing for customizable light output and activation based on detected conditions.
Implementation Method 1
a sensor on the housing for detecting an amount of light external to the light fixture and generating an activation signal for the light source based on the detected light being within a predefined activation range
Implementation Method 2
an optic connected to the housing and covering the opening of the installation cavity
Data Source
AI summary
A lighting system, including but not limited to security lighting systems, includes a light fixture having a housing and a light source supported on the housing. The light fixture may include an adjuster that is adjustable to control both an output level of the light source and an external light level at which the light source is activated. Additionally or alternatively, the light source may be a first light source, and the light fixture may include a second light source and a motion sensor housed within an installation cavity of the housing and behind an optic of the light fixture. The first light source may be supported on the housing outside of the installation cavity.