DALI Converter Unit Transparent Mode for Sensor Feedback
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Solution Overview
Problem
The DALI standard limits the number of devices that can be connected to a lighting system due to the restriction of 64 addresses, and existing converter solutions only allow uniform control of devices, preventing individual addressing and feedback from sensors.
Innovation Solution
A converter unit for a DALI system that can temporarily switch to a transparent operating mode, allowing individual addressing and feedback of selected devices, enabling increased device connectivity and integration of diverse devices like sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If converters are used to increase the number of devices beyond 64 addresses, then the number of connectable devices is improved, but individual control capability is lost and devices can only be controlled uniformly
Solution Approach 1:
The converter unit dynamically switches between two operating modes: transparent mode for individual device control and converter mode for uniform group control. This dynamic mode switching allows the system to adapt to different control requirements, resolving the contradiction between individual control capability and uniform group control.
Solution Approach 2:
The system segments control into two distinct modes: transparent mode where the converter acts as a transparent bridge for individual device addressing, and converter mode where it provides uniform group control. This segmentation allows both individual and uniform control to coexist in the same system.
2Quantity of substance
If converters are used to expand device capacity, then device connectivity is improved, but feedback capability from devices like sensors is lost
Solution Approach 1:
The converter unit dynamically switches between transparent mode that preserves feedback capability and converter mode for uniform control. In transparent mode, feedback from sensors and other devices passes through unchanged, while in converter mode uniform control is prioritized. This dynamic switching resolves the contradiction between expanded connectivity and feedback capability.
3Adaptability or versatility
If the DALI standard with 64 addresses is used, then individual device control is possible, but the number of connectable devices is limited
Solution Approach 1:
The converter unit acts as an intermediary between the DALI bus and multiple devices. It receives individual device commands from the DALI bus and distributes them to the appropriate devices, enabling the system to address more than 64 devices while maintaining individual control capability through the converter's addressing logic.
Solution Approach 2:
The system segments the addressing space by introducing a converter layer that manages device addresses. The converter maintains a mapping between DALI bus addresses and actual device addresses, allowing individual device control to be segmented across multiple devices beyond the standard 64-address limit.
Data Source
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AI summary
The converter unit (10) associated with the DALI address is connected to a DALI bus (2) for receiving commands of central control unit (100). The output side portion of the converter unit is connected to sensors (20-1-20-3,30) in a transparent mode, which are communicated in accordance with DALI standard. Independent claims are included for the following: (1) illumination system; and (2) method for operating sensors.