Conical Glare Shield for Infrared Sensor Luminance Accuracy
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Solution Overview
Problem
Conventional infrared sensing devices are susceptible to glare from nearby lighting sources, leading to incorrect determination of ambient luminance and misoperation when bundled with lighting devices.
Innovation Solution
A sensing device equipped with a detachable glare shield featuring a conical portion and a bottom opening, mounted around the lens hood of the infrared sensor to prevent glare from adjacent light sources, ensuring accurate ambient luminance judgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infrared sensor is bundled with a lighting device in operation, then the sensing device can provide powers-saving and anti-theft functions, but the infrared sensor is susceptible to glare from nearby lighting sources causing incorrect determination of ambient luminance and misoperation
Solution Approach 1:
A glare shield is introduced as an intermediary component between the infrared sensor and the harmful glare from lighting devices. The glare shield physically blocks the glare from reaching the sensor, allowing the sensor to accurately detect ambient luminance without interference while maintaining its bundled operation with lighting devices
Solution Approach 2:
The sensing device is segmented into distinct functional components: the infrared sensor for detecting intruders, the lighting device for illumination, and the glare shield for protecting the sensor. This segmentation allows each component to perform its function independently without interfering with others, resolving the contradiction between bundled operation and glare susceptibility
2Productivity
If the infrared sensor detects infrared rays emitted from an intruder to drive the lighting device, then the sensing device provides anti-theft functions, but glare from lighting devices causes misoperation by incorrectly turning on or off the lighting device
Solution Approach 1:
The glare shield acts as a protective intermediary that selectively blocks harmful glare from lighting devices while allowing the infrared sensor to detect intruder heat signatures. This ensures the anti-theft function operates reliably without misoperation caused by glare-induced incorrect luminance determination
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 glare shield effectively prevents glare interference, allowing the infrared sensor to perform normal luminance judgment without causing misoperation, even when the sensing device is in operation with a lighting device.
Implementation Method 1
an infrared sensing device detects infrared rays emitted from an intruder
Implementation Method 2
preventing glare emitted from adjacent light sources from entering the infrared sensor
Data Source
AI summary
A sensing device with a glare shield has an infrared sensor and a glare shield. The infrared sensor has a body and a lens hood. The lens hood is mounted around an outer periphery of the body. The glare shield is conical, is detachably mounted around the lens hood of the infrared sensor, and extends in a direction away from the body of the infrared sensor. The glare shield prevents the infrared sensor from being affected by glare emitted from adjacent lighting devices. Accordingly, the sensing device avoids incorrect judgment of environmental luminance caused by lighting devices nearby and therefore generates less misoperation, so that the goal of being more power-saving can be achieved.