Active Illumination Timing Control for Signal Interference Reduction
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Solution Overview
Problem
Active illumination systems often interfere with each other due to electromagnetic radiation emitted by different devices, leading to erroneous readings, saturation, and operational errors, especially in high-density environments.
Innovation Solution
Active illumination devices are equipped with processors that detect interference from external sources and adjust the timing of their illumination signals and detection windows to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple active illumination devices operate in close proximity, then the coverage area and functionality are improved, but electromagnetic radiation interference between devices increases
Solution Approach 1:
The patent implements periodic action by using time-division multiplexing where illumination devices emit signals in alternating time slots rather than continuously. Device 1 emits during slot 1, device 2 during slot 2, and so on, creating a periodic pattern that eliminates simultaneous emissions and reduces electromagnetic interference while maintaining comprehensive coverage.
Solution Approach 2:
The system dynamically adjusts the timing and duration of illumination signal emissions based on detected interference levels and environmental conditions. The controller modifies emission parameters in real-time, changing the temporal characteristics of signal transmission to optimize performance while minimizing interference in dense device environments.
2Measurement precision
If active illumination devices use bright illumination pulses with significant ranges, then the detection capability and range are improved, but interference with other systems increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the intensity, duration, and timing of illumination pulses based on operational conditions. The controller modifies these parameters in response to detected interference or saturation, reducing pulse brightness when necessary to prevent interference with other systems while maintaining adequate detection capability.
Solution Approach 2:
The system incorporates feedback mechanisms where sensors detect returned signals and interference levels, and the controller uses this information to adjust subsequent illumination pulse parameters. This closed-loop control ensures that bright pulses are used only when necessary for adequate detection, automatically reducing intensity when interference or saturation is detected.
3Duration of action of stationary object
If continuous wave light sources are used instead of pulse illumination, then the illumination continuity is improved, but sensor saturation and interference increase
Solution Approach 1:
The patent converts continuous wave illumination into periodic pulsed illumination, where the light source emits signals in discrete time slots rather than continuously. This periodic operation provides sufficient illumination continuity for detection purposes while creating dark periods that allow sensors to reset and prevent saturation, eliminating the harmful effects of continuous illumination.
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 effectively reduces interference by autonomously altering the timing of illumination signals, preventing collisions and ensuring accurate operation in dense environments.
Implementation Method 1
senses portions of the emitted radiation that are returned from the scene to produce an image or data about the scene
Implementation Method 2
emits electromagnetic radiation to illuminate a scene of interest
Data Source
AI summary
Apparatuses, systems and methods are disclosed for reducing interference between an active illumination device and external radiation sources, for example, other active illumination devices operating within the vicinity. A disclosed system includes one or more active illumination devices, each configured to emit an illumination signal and also to receive a returned portion of its respective illumination signal with at least one sensor. At least one of the active illumination devices is capable of detecting interference caused by an external source, for example, an illumination signal emitted from another active illumination device. As a result of detecting the interference, the receiving active illumination device changes the timing of its subsequent illumination signals and sensor operation. By detecting collisions between illumination signals and consequently altering the timing of it operation, the active illumination device may reduce interference in congested environments where multiple active illumination devices are operating within range of each other.