Multi-LED UVB Irradiance Calibration for Uniform Wide-Area Coverage
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Solution Overview
Problem
Existing UVB light sources, whether fluorescent lamps or LED lamp beads, suffer from rapid light attenuation and non-uniform irradiance due to differences in lamp bead chips, making it difficult to achieve uniform UVB coverage over a large area, especially in applications like pet feeding where consistent UVB exposure is crucial for animal health.
Innovation Solution
A method involving optical simulation, PWM constant current control circuits, and touch switches to adjust and calibrate the irradiance of each UVB lamp bead, ensuring uniform superimposed UVB irradiance through steps of simulation, measurement, and calibration, using a device with a microcontroller and touch switches to fine-tune each lamp bead's emission intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple LED UVB lamp beads are used to expand coverage area, then the illumination area is improved, but the uniformity of UVB irradiance deteriorates due to differences between individual chips
Solution Approach 1:
The patent implements feedback control by measuring the actual UVB irradiance of each lamp bead and using this information to adjust the driving current individually. The control unit receives irradiance measurement data and modifies the current supplied to each lamp bead to compensate for chip variations, ensuring uniform overall irradiance distribution across the coverage area.
Solution Approach 2:
The patent changes the electrical parameters (driving current) of each lamp bead based on its specific characteristics. By individually adjusting the current parameter for each lamp bead according to its measured irradiance output, the system compensates for manufacturing variations and achieves uniform irradiance distribution across multiple lamp beads.
2Area of stationary object
If the number of UVB lamp beads is increased to provide wide area coverage, then the illumination area is improved, but the complexity of ensuring uniform irradiance increases
Solution Approach 1:
The patent segments the control system into independent channels for each lamp bead. Each lamp bead has its own current control circuit that can be independently adjusted, allowing individual optimization of each component while maintaining overall system simplicity through modular architecture.
Solution Approach 2:
The system performs self-calibration by automatically measuring the irradiance of each lamp bead and adjusting its driving current accordingly. This self-service mechanism eliminates the need for manual adjustment and reduces the operational complexity of ensuring uniform irradiance across multiple lamp beads.
3Manufacturing precision
If optical simulation software is used to optimize lamp bead distribution, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by using optical simulation software to pre-optimize the arrangement and distribution of lamp beads before physical installation. The simulation allows virtual testing and optimization of lighting configurations, enabling precise prediction and adjustment of UVB distribution patterns without requiring complex real-time adjustment mechanisms.
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 method ensures uniform UVB irradiance across multiple lamp beads, maintaining consistent coverage and overcoming the limitations of non-uniformity and attenuation, achieving a wide range of uniform UVB light sources.
Implementation Method 1
LED UVB lamp beads are also available on the market, which emit light directly under the action of voltage through semiconductor chips
Implementation Method 2
the general practice is to add an optical lens to the LED UVB lamp bead encapsulated to diffuse the light evenly
Data Source
AI summary
A method for providing a wide range of uniform UVB light sources and a device thereof, which are used to ensure the uniform superimposed UVB irradiance in a lamp equipped with multiple UVB lamp beads. The method comprises the following steps: selecting the angle of a UVB lens and appropriate band and light power and optical power, adjusting the distance between UVB lamp beads to ensure that the irradiance of UVB lamp beads is superimposed to a target range, and fine-tuning each lamp bead; setting up a PWM constant current control circuit with a corresponding number of channels according to the number of UVB to subdivide and digitize the irradiance, and obtain an accurate value to correspond to the corresponding UVB value; using a UVB irradiance meter for real-time measurement; and calibrating the irradiance to the target UVB irradiance following a calibration program.