Rotatable Shelf Illumination Using Motion-Triggered LED Control
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Solution Overview
Problem
In cabinet designs with rotatable shelves, such as lazy susans, it is difficult to determine the contents stored on the shelves due to inadequate lighting, especially when the lighting external to the cabinet is insufficient.
Innovation Solution
A rotatable shelf illumination system that includes a series of light sources, such as LEDs, mounted along the edge of the shelf, powered by a rechargeable supply and controlled by a magnetic field sensor and controller circuitry, which adjusts lighting based on the shelf's rotational position and detects motion to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are continuously energized to illuminate the shelf contents, then visibility is improved, but energy consumption increases
Solution Approach 1:
The system employs periodic action by energizing light sources only during specific periods when rotational movement is detected, rather than continuously. The controller circuitry monitors for rotation events and activates illumination temporarily during these periods, then deactivates it after a predetermined time, creating an on-demand lighting pattern that reduces overall energy consumption while maintaining visibility when needed.
Solution Approach 2:
The system implements feedback through motion detection mechanisms that monitor shelf rotation and provide signals to the controller circuitry. When rotation is detected, the feedback triggers light source activation; when rotation stops and the predetermined time elapses, the feedback signals deactivation. This closed-loop control ensures illumination occurs only when the shelf is being accessed or viewed.
2Measurement precision
If the system continuously monitors rotational position to provide accurate illumination control, then positioning accuracy is improved, but energy consumption increases
Solution Approach 1:
The system applies dynamics by transitioning the monitoring system between active and dormant states. The magnetic field sensor and controller circuitry enter a low-power state during periods of no activity, then become fully active when motion is detected. This dynamic operation allows precise rotational position measurement only when necessary, reducing energy consumption while maintaining measurement accuracy during active periods.
Solution Approach 2:
The system performs preliminary action by detecting motion events that trigger the activation of the monitoring and illumination systems. Rather than continuously operating, the system prepares to monitor rotational position only when motion is detected, activating the magnetic field sensor and controller circuitry in advance of the actual rotation event to ensure accurate measurement from the start of movement.
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 provides adjustable and efficient lighting that illuminates the contents of the shelf as it rotates, automatically turning on when significant movement is detected and turning off after a period of inactivity, thereby enhancing visibility and conserving power.
Implementation Method 1
A magnetic field sensor may be included in the electronics enclosure and powered by the rechargeable power supply. The magnetic field sensor may measure a magnetic field, which may be used by a controller circuitry to determine a rotational position of the rotatable shelf
Implementation Method 2
A series of light sources, such as light emitting diodes (LEDs), may be mounted in a groove formed around a circumferential outer or inner edge of the rotatable shelf
Implementation Method 3
A refractive lens may be mounted in the groove formed around the circumferential edge of the rotatable shelf as a cover over the light sources
Data Source
AI summary
A rotatable shelf illumination system may include a rotatable shelf having a groove in which one or more light sources may be mounted. A refractive lens may be mounted in the groove covering the one or more light sources. The rotatable shelf may be, for example, a lazy susan. A removeable and rechargeable power supply may be controlled by a controller circuitry to selectively energize the one or more light sources when rotation of the rotatable shelf is detected. A magnetic field sensor may be used with the controller circuitry to detect rotational movement of the rotatable shelf. The controller circuitry may implement energy conservation measures to prolong the charge of the rechargeable power supply.