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DALI bus transmission distance extension control system

A technology of transmission expansion and distance expansion, applied in the field of DALI bus transmission distance expansion control system, can solve the problems of low system utilization efficiency and achieve the effect of simple implementation and use

Pending Publication Date: 2021-04-23
南京美加杰智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the continuous expansion of the application field of DALI technology, the existing 300-meter wiring distance makes it difficult to apply it in scenarios such as high-speed rail platforms, production lines, and road lighting inside the factory area where lamps are arranged in a long distance in a straight line. Under the constraints, if the distance between lamps is 25 meters, only 12 lamps can be connected at most (far from reaching the maximum capacity of 64 lamps in a single system), and the system utilization efficiency is extremely low

Method used

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  • DALI bus transmission distance extension control system
  • DALI bus transmission distance extension control system
  • DALI bus transmission distance extension control system

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Experimental program
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Embodiment 1

[0019] as attached figure 1 As shown, a DALI bus transmission distance extension control system includes a DALI transmission expansion device, a DALI transmission expansion bus power supply, a DALI subsystem, and a DALI transmission expansion bus. The DALI transmission expansion device is connected to the DALI transmission expansion through the DALI transmission expansion bus Bus power supply, DALI transmission expansion device connected to DALI subsystem.

[0020] Such as figure 2 The DALI transmission extension device includes a DALI bus signal transceiver isolation circuit, a DALI extended bus signal transceiver isolation circuit, an internal power supply DC / DC isolation conversion circuit and an MCU control circuit, and the MCU control circuit is respectively connected with the DALI bus signal transceiver isolation circuit, the DALI The expansion bus signal transceiver isolation circuit and the internal power supply DC / DC isolation conversion circuit are connected. When...

Embodiment 2

[0036] Such as Figure 4 As shown, the DALI subsystem is a lighting control system with DALI protocol, which is equipped with DALI bus power supply, DALI lamps, DALI switches, DALI sensors and DALI application controllers. The number of DALI subsystems can be one or more; the number of expansion buses can also be increased according to the number of DALI subsystems. When wiring the existing DALI system bus, it can be divided into several DALI subsystems according to the wiring area and wiring distance, and the transmission distance can be extended by adding DALI transmission expansion devices between different DALI subsystems. The expansion bus connected between one or more DALI transmission expansion devices provides DALI transmission expansion bus power supply to increase the bus power supply level and greatly increase the wiring distance.

[0037] All functions may be realized in the above embodiments, or part of functions may be realized as required.

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Abstract

The invention relates to a DALI bus transmission distance extension control system that is characterized by comprising a DALI transmission extension device, a DALI transmission extension bus power supply, a DALI subsystem and a DALI transmission extension bus; the DALI transmission extension device is connected with the DALI transmission extension bus power supply through the DALI transmission extension bus, and the DALI transmission extension device is connected with the DALI subsystem. The system is easy to implement and use, and definition of a transmission control layer, a network layer and an application layer of an existing DALI standard is not affected. On the premise of not changing the existing DALI standard interface and bus topology, the limitation of a single bus wiring distance is broken through, so that the DALI lighting system can be applied to a scene of long-distance linear distribution of the lighting system.

Description

technical field [0001] The invention relates to the technical field of intelligent lighting control, in particular to a DALI bus transmission distance extension control system. Background technique [0002] DALI (Digital Addressable Lighting Interface, Digital Addressable Lighting Interface) is a lighting standard defined by IEC62386. A DALI bus can access up to 64 controlled lighting devices (such as LED lamps, relays, etc.) and 64 control devices (such as switches, sensors, etc.). As a mainstream intelligent lighting technology, DALI is widely used in large venues, commercial lighting and office lighting control systems. [0003] The DALI bus can not only provide power for the devices on the bus (the bus power supply current is up to 250mA), but also be used for the transmission of communication signals. Since the rated voltage of the DALI bus power supply is only 16VDC, in order to meet the effective distinction between high and low logic levels received by DALI communi...

Claims

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Application Information

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IPC IPC(8): H05B47/18H05B47/10H05B47/20
Inventor 田劲邴艳蓉张勇
Owner 南京美加杰智能科技有限公司