Aircraft Anti-Collision LED Light with Dynamic Current Control
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Solution Overview
Problem
Aircraft anti-collision LED lights face reduced light intensity due to aging effects, requiring increased operational current, which can lead to longer flashing intervals and reduced visibility, necessitating a solution to maintain high visibility and detect end-of-life conditions.
Innovation Solution
An anti-collision aircraft light system that dynamically adjusts the operating current of LEDs based on ambient temperature and light intensity, using a control unit to maintain maximum intensity and monitor flashing intervals, generating a warning signal when intervals exceed a pre-set value, ensuring high visibility and detecting near-end-of-life conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If operational current is increased to compensate for LED aging degradation, then light intensity is maintained, but flashing interval increases and visibility deteriorates
Solution Approach 1:
The patent implements dynamic control of LED operation by switching between continuous mode and pulsed mode based on real-time monitoring of light intensity and flashing interval. The control unit adjusts operational parameters dynamically to maintain visibility requirements while preventing the deterioration caused by fixed high-current operation.
Solution Approach 2:
The system incorporates feedback mechanisms through light intensity sensors and control units that continuously monitor the actual light output and flashing interval. This feedback loop enables the control unit to adjust the operational current and pulse width accordingly, maintaining optimal visibility without excessive flashing intervals even as LEDs age.
2Illumination intensity
If operational current is increased to maintain light intensity, then visibility is maintained, but LED lifespan is reduced
Solution Approach 1:
The patent employs periodic pulsed operation of LEDs instead of continuous high-current operation. By controlling LEDs to flash at specific intervals with controlled duty cycles, the system maintains required light intensity during visible periods while reducing overall stress on the LEDs, thereby extending their operational lifespan.
Solution Approach 2:
The system dynamically changes operational parameters including current level and pulse width based on real-time conditions and LED aging state. The control unit adjusts these parameters to maintain visibility requirements while operating LEDs within safe thermal and electrical limits, preventing premature failure.
3Device complexity
If fixed flashing interval is used, then system simplicity is maintained, but visibility requirements are not met during LED aging
Solution Approach 1:
The control unit incorporates feedback from light intensity sensors to monitor actual visibility performance. Based on this feedback, the system automatically adjusts the flashing interval and pulse characteristics to maintain Blondel-Rey compliance even as LEDs degrade, without requiring complex manual calibration or fixed interval settings.
Solution Approach 2:
The system performs self-adjustment of operational parameters through integrated sensing and control circuitry. The control unit automatically compensates for LED aging effects by adjusting current and timing parameters based on real-time measurements, eliminating the need for external intervention or complex predetermined scheduling.
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 maintains high visibility by adjusting current and flash duration to keep light intensity consistent with Blondel-Rey standards, prolonging LED life and providing timely end-of-life warnings for maintenance, ensuring continuous high attention-raising performance.
Implementation Method 1
anti-collision lights for aircrafts more and more include LEDs instead of xenon light sources
Implementation Method 2
sensing an ambient temperature in the surrounding of the at least one LED
Implementation Method 3
sensing the intensity of the light emitted from the at least one LED when operated in a pulsed manner
Data Source
Figure 1
Figure 2
AI summary
The anti-collision aircraft light comprises at least one LED (10) and a control unit for operating the at least one LED (10) in a pulsed manner. In this anti-collision aircraft light, the control unit (12) comprises an ambient temperature sensor (14) for sensing the ambient temperature and an adjustable current control means (18) for setting an LED (10) operating current depending on the sensed ambient temperature. The control unit (12) further includes a light intensity sensor (22) for sensing the intensity of the light emitted from the at least one LED (10), a integrator (24) connected to the light sensor for integrating the sensed light intensity, and a comparator (26) for comparing the integrated light intensity to a threshold value (Iref). The operating current for the at least one LED (10) is interrupted as soon as the integrated light intensity is equal to the threshold value (Iref) ,