Coded Light Source Commissioning via Sensitivity Control
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Solution Overview
Problem
In coded lighting systems, the sensitivity of control devices makes it difficult to successfully extract identifiers from light sources located remotely, leading to signal collisions and inefficient commissioning processes.
Innovation Solution
A remote controller with a light detector, processing unit, and transmitter that adjusts sensitivity and emits commands to switch off identified light sources, reducing collisions and enabling sequential identification and control of light sources, while storing identifiers to prevent duplicates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the control device uses high sensitivity to detect light from remote luminaires, then the detection range is improved, but signal collisions increase making identifier extraction difficult
Solution Approach 1:
The system performs preliminary actions by having luminaires transmit their identifiers in advance before full commissioning operations. The control device receives and stores these identifiers proactively, so that when commissioning is needed, the information is already available without requiring high-sensitivity detection that causes collisions.
Solution Approach 2:
The patent introduces an intermediary approach where the control device acts as a mediator that manages the identifier reception process. It coordinates the timing and selection of which luminaire identifiers to receive, preventing simultaneous receptions that cause collisions while maintaining the ability to detect remote luminaires.
2Ease of manufacture
If luminaires transmit identifiers in random access fashion, then the system is simple to implement, but many collisions occur before successful identification
Solution Approach 1:
The system implements periodic action by organizing identifier transmission into structured time frames. Each frame contains identifiers from specific luminaires in a predetermined sequence, converting the random access approach into a periodic, collision-free transmission pattern that maintains simplicity while reducing commissioning time.
Solution Approach 2:
The identifier transmission schedule is predetermined and prepared in advance. The control device knows which luminaire identifiers to expect in each time frame, allowing it to efficiently process information without waiting for random transmissions or dealing with collisions, thus reducing commissioning time.
3Quantity of substance
If the control device receives identifiers from all luminaires simultaneously, then complete system coverage is achieved, but signal collisions prevent successful extraction
Solution Approach 1:
The patent applies segmentation by dividing the simultaneous identifier reception task into separate time frames. Each frame is dedicated to receiving identifiers from specific luminaires, preventing overlaps and collisions. This segmented approach maintains complete system coverage while ensuring accurate extraction of each identifier.
Solution Approach 2:
The system uses periodic action with structured time frames where identifiers are received in predetermined sequences. This periodic structure ensures that all luminaire identifiers are eventually received (complete coverage) while the time-division approach prevents signal collisions (maintains extraction accuracy).
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 remote controller efficiently commissions light sources by prioritizing nearby sources, reducing signal collisions, and ensuring accurate identification and control, even in complex lighting systems with multiple sources.
Implementation Method 1
a light detector; a processing unit coupled to the light detector and arranged to determine an identifier of the light source based on light detected by the light detector
Implementation Method 2
a transmitter arranged to transmit a command to the identified light source
Data Source
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AI summary
Commissioning a coded light source in a lighting system is accomplished by using a remote controller. When an identification of a light source is successful, a control message is sent to that light source to at least partly switch off its light emission. Thus the light contribution of the identified light source is suppressed. Thereby the chance of coded light from an already identified light source colliding with identifiers comprised in coded light emitted by other light sources is reduced. When no more coded light is detectable, a sensitivity of the remote controller can be increased until coded light again is detectable. Further light sources can then be identified and commissioned.