Rotating Infrared Light Module Test for 3D Uniformity Mapping
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Solution Overview
Problem
Existing methods for testing light modules in autonomous vehicles are resource-intensive, labor-intensive, or require multiple measurements to create a 360-degree light distribution map, which can be inefficient and time-consuming.
Innovation Solution
A system and method for testing light-emitting modules that includes a mounting platform for securing the light module, a housing with a plurality of photodiodes arranged in an array over a 90-degree arc, and a controller to control the photodiodes and the rotation of the mounting platform, allowing for simultaneous measurement of light intensities over 360 and 180 degrees to create a three-dimensional light distribution map.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If photodiodes are arranged in an array over a 90-degree arc and the mounting platform is rotated to enable simultaneous measurement over 360 and 180 degrees, then the productivity of light module testing is improved, but the device complexity increases
Solution Approach 1:
The photodiode array is segmented into multiple discrete photodiodes positioned at specific angular intervals around a 90-degree arc. This segmentation allows each photodiode to independently measure light intensity at different angles, and through rotation of the mounting platform, comprehensive 360-degree coverage is achieved without requiring a complete circular array of photodiodes, thus improving productivity while controlling device complexity
Solution Approach 2:
The mounting platform is designed to rotate dynamically during testing, transforming the static photodiode array into a dynamic measurement system. This rotation enables the same physical photodiode array to sequentially occupy different angular positions, allowing simultaneous measurement capability over 360 and 180 degrees without permanently installing photodiodes at all possible angles, thereby improving testing efficiency while avoiding the complexity of a fully populated circular array
2Measurement precision
If multiple measurements are taken at different fields of view to construct a three dimensional illumination pattern, then the measurement precision is improved, but the loss of time increases
Solution Approach 1:
The photodiodes are pre-positioned in an array configuration over a 90-degree arc at predetermined angular intervals before testing begins. This preliminary arrangement allows the system to capture multiple angular measurements simultaneously during a single rotation cycle, eliminating the need to sequentially reposition photodiodes or take multiple separate measurements at different fields of view, thus maintaining measurement precision while significantly reducing testing time
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 efficiently creates a three-dimensional light distribution map, ensuring that the light module provides adequate illumination to the edges of the cabin, thereby improving imaging quality and reducing testing time and resources.
Implementation Method 1
The array may include a first photodiode and a second photodiode. The first photodiode may be positioned at a first angle relative to the light module and the second photodiode may be positioned at a second angle relative to the light module
Data Source
AI summary
Example embodiments described herein involve a system for testing a light-emitting module. The light-emitting module may include a mounting platform configured to hold a light-emitting module for a camera. The mounting platform may also be configured to rotate. The system may further include a housing holding a plurality of photodiodes arranged in an array over at least a 90 degree arc of a hemisphere. The system may also include a controller configured to control the photodiodes and the rotation of the mounting platform.