Enhancement type DMX512 light control system added with auxiliary collocation channel

A DMX512, configuration channel technology, applied in energy-saving control technology, data exchange through path configuration, light source and other directions, can solve the problems of difficult system maintenance, reduce system communication rate, the main controller can not be identified, etc., to expand system performance, The effect of ensuring reliability and long communication distance

Inactive Publication Date: 2009-04-08
上海大峡谷光电科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, sometimes in order to adapt to the harsh working environment, it may be required to reduce the communication rate of the system and reduce the size of the data frame to ensure the stability of the system, but the standard DMX512 system cannot adjust the specification parameters of the protocol online
[0005] In addition, the standard DMX512 system doe

Method used

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  • Enhancement type DMX512 light control system added with auxiliary collocation channel
  • Enhancement type DMX512 light control system added with auxiliary collocation channel
  • Enhancement type DMX512 light control system added with auxiliary collocation channel

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Effect test

Embodiment 1

[0021] As shown in Figure 2, this figure shows the basic structure of Embodiment 1 of the enhanced DMX512 lighting control system with added auxiliary configuration channels according to the present invention. The DMX512 lighting control system has a main channel and an auxiliary channel, a universal asynchronous transceiver UART and a node controller MCU are connected to the main channel between each main control point and nodes, and the auxiliary channel between each two nodes A UART and a node controller MCU are also connected to the channel. The node controller on the primary channel and the node controller on the secondary channel pass the I 2 C bus or general purpose I / O port connection. The main channel follows the half-duplex mechanism of the RS485 communication protocol, and uses a bus network to connect the main controller and several node control units. The auxiliary channel connects the main controller and several node control units in series in a hand-in-hand ma...

Embodiment 2

[0063] As shown in Figure 3, the basic structure of Embodiment 2 of the enhanced DMX512 lighting control system with additional auxiliary configuration channels according to the present invention is generally the same as that of Embodiment 1. The difference is that the core control unit in the node control unit in Embodiment 2 The device adopts a node controller, and the node controller is applied to the main channel and the auxiliary channel at the same time through two universal asynchronous transceivers connected to the main channel and the auxiliary channel respectively. The structure and working principle of the second embodiment are similar to the first embodiment, and those skilled in the art can carry out the second embodiment according to the description of the first embodiment, so the second embodiment will not be described in detail here. It should be noted that since the auxiliary channel and the main control channel of the present invention are two independent chan...

Embodiment 3

[0065] As shown in Figure 4, it is a schematic diagram of the basic structure of the third embodiment of the enhanced DMX512 lighting control system according to the present invention. Compared with the second embodiment, in order to further reduce the cost, the nodes in the third embodiment The control unit uses a low-cost MCU with only one UART built in. When working, the only UART is used for the main channel, and the sending and receiving end of the auxiliary channel is connected to the general I / O port of the MCU. The software of the MCU reads the status of the receiving I / O port and sets the sending I / O port to simulate Realize the function of hardware UART. Realizing the UART function with software will take up a certain amount of CPU time, so in this alternative in this embodiment, the software of the MCU can adopt the strategy of giving priority to the auxiliary channel, that is, when the auxiliary channel transitions from a high level to a low level , which is the s...

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Abstract

The invention relates to an enhanced DMX512 light control system which is added with an accessory channel. The enhanced DMX512 light control system comprises a main controller, a plurality of node control units and a plurality of lamps which are connected with each node control unit. The main controller is connected with a plurality of node control units by a main channel. The main channel uses a bus type network and a half-duplex in accordance with an RS485 communication protocol. Besides, the main controller is connected with each node control unit by an accessory channel at the same time. The accessory channel uses the series connection form hand in hand. The system uses an instructing frame and a responding frame to transmit information between the main controller and a plurality of node control units. The enhanced DMX512 light control system can carry out online real-time allocation of working parameters of each branch control node including an address and can obtain the working parameters of each branch control node on line at real time.

Description

technical field [0001] The present invention relates to a lighting control system, more specifically, relates to an enhanced DMX512 system with auxiliary configuration channels added. Background technique [0002] The DMX512 protocol is a stage lighting control protocol released by USITT (American Theater Technology Association) in 1986. It has become an international standard protocol and is widely used in lighting control systems for stage lighting and architectural landscape lighting. [0003] Figure 1 shows a schematic diagram of the connection of a standard DMX512 system, which does not consider the photoelectric isolation measures between nodes. The main controller and each node controller of the standard DMX512 system constitute a bus network with single node sending and multi-node receiving. In actual engineering, when the bus mode is used for communication, each communication node (except the master control node) must have a unique address or ID number, so that the...

Claims

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Application Information

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IPC IPC(8): H05B37/02H04L12/40
CPCY02B20/42Y02B20/40
Inventor 韦自力张家瑞
Owner 上海大峡谷光电科技有限公司
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