CN103249226B - LED control bus communication method - Google Patents
LED control bus communication method Download PDFInfo
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- CN103249226B CN103249226B CN201310156214.3A CN201310156214A CN103249226B CN 103249226 B CN103249226 B CN 103249226B CN 201310156214 A CN201310156214 A CN 201310156214A CN 103249226 B CN103249226 B CN 103249226B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an LED control bus communication method. The LED control bus communication method adopts a physical layer of a 485 bus and performs real-time control and feedback on an LED lamp by utilizing expansibility of a DMX512-A communication protocol through a time half-duplex method. According to the invention, under the premise of not increasing connecting lines, real-time feedback and control of data are realized, simplicity in wire arrangement is ensured, production cost is further lowered, and maintenance is convenient.
Description
Technical field
The present invention relates to a kind of LED control field, particularly a kind of LED control bus means of communication.
Background technology
At present, existing LED control system adopts DMX512 bus mastering mode mostly, the communication of DMX512 control bus can only one-way transmission signal in control procedure, and the shortcoming of one-way transmission can only send data-signal to light fixture by controller exactly, and light fixture state cannot be fed back.Cannot detect the state of LED lamp at the process middle controller controlled, the inefficacy of light fixture and breakdown judge maintenance difficult, controller also cannot judge intelligently, there will be the situations such as the not controlled or inefficacy of other light fixtures when single-point breaks down.For this reason, part LED control system is at DMX512 control bus newly-increased independent control loop outward, and in order to detect light fixture state information, newly-increased control loop not only increases wiring complexity, singly opens a bus and too increases cost.
Summary of the invention
The object of the invention is to, a kind of LED control bus means of communication are provided.The present invention, when not increasing outside line, realizes Real-time Feedback and the control of data, not only ensure that simple wiring, also reduce production cost, safeguards and becomes convenient.
Technical scheme of the present invention: a kind of LED control bus means of communication, is characterized in that: the physical layer adopting 485 buses, utilizes DMX512-A communications protocol autgmentability to be controlled in real time LED lamp by time-division half-duplex method and feed back.
In the aforesaid LED control bus means of communication, described is specifically carried out by time-division half-duplex method in the steps below by DMX512-A communications protocol autgmentability:
1., when frame rate is certain, in every 1 second, a 40ms is increased as data query Frame;
2., in data query Frame, Master controller sends inquiry to all Station controllers and to go on the air Frame, notifies that all Station controllers are prepared as uplink state and prepare one of them data query;
3. first Station controller after time delay a period of time to a state of this light fixture needed for Master controller feedback;
4. second Station controller is to a state of this light fixture needed for Master controller feedback after time delay a period of time, and delay time becomes multiple proportion with Station controller sequence number;
5. the feedback of all Station controllers is carried out successively;
6. Master controller is after wait-receiving mode exceedes certain hour, be defaulted as feedback to terminate, now Master controller sends poll-final broadcast Frame to all Station controllers, notifies that all Station controllers revert to the video flowing Frames that downstream state prepares to receive next second.
In the aforesaid LED control bus means of communication, described frame rate is 15 frames/s-50 frame/s.
In the aforesaid LED control bus means of communication, the described light fixture state feedback time adopts address code or address number binding constant time lag time to carry out transmission feedback.
In the aforesaid LED control bus means of communication, the external interface of 485 described buses is 485+, 485-and GND.
Compared with prior art, the present invention is by utilizing and improveing DMX512-A communications protocol, and realize Real-time Feedback to light fixture state and control dexterously, at low cost by time-division half-duplex method, can detect the state of LED lamp at the process middle controller controlled, the inefficacy of light fixture and breakdown judge maintenance become simple, controller also can judge intelligently, avoids the situations such as the not controlled or inefficacy of other light fixtures when single-point breaks down.The present invention does not increase independent loop, but realize on original circuit, make wiring not become complicated, cost also obtains effective control; The present invention by increasing the data query Frame of a 40ms in 1s, and human eye is imperceptible flicker, can not affect result of use.The present invention also complete compatible market can adopt the light fixture of DMX512-A communication modes, and range of application is wider.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but not as the foundation limited the present invention.
Embodiment.A kind of LED control bus means of communication, adopt the physical layer of 485 buses, utilize DMX512-A communications protocol autgmentability to be controlled in real time LED lamp by time-division half-duplex method and feed back.
Preferably, describedly specifically to be carried out in the steps below by time-division half-duplex method by DMX512-A communications protocol autgmentability:
1. when frame rate is 15 frames/s-50 frame/s, in every 1s, a 40ms is increased as data query Frame(frame); Such as (namely play 25Frames in 1s) when 25 frames/s, at interior increase per second 40ms as data query Frame, the time being equivalent to Frame1-Frame25 becomes 38.4ms;
2., in data query Frame, Master controller sends inquiry to all Station controllers and to go on the air Frame, notifies that all Station controllers are prepared as uplink state and prepare one of them data query; Described data query can be current data;
3. first Station controller after time delay a period of time to a state (electric current) of this light fixture needed for Master controller feedback;
4. second Station controller is to a state of this light fixture needed for Master controller feedback after time delay a period of time, and delay time becomes multiple proportion with Station controller sequence number (also can be address code or address number); Such as: the delay time of this second Station controller is 2 times of first Station delaying time of controller time;
5. the feedback of all Station controllers is carried out successively, until last Station controller completes feedback;
6. Master controller exceedes certain hour at wait-receiving mode and (is the wait-receiving mode time of setting, can set according to actual conditions) after, be defaulted as feedback to terminate, now Master controller sends poll-final broadcast Frame to all Station controllers, notifies that all Station controllers revert to the video flowing Frames that downstream state prepares to receive next second.
The described light fixture state feedback time adopts address code or address number binding constant time lag time to carry out transmission feedback.The described constant time lag time is the light fixture state feedback time of front one-address code or address number and the summation of delay time; Such as second the light fixture state feedback time is the feedback time of first light fixture and the summation of delay time; 3rd light fixture state feedback time is the feedback time of second light fixture and the summation of delay time; The like.Thus ensure each light fixture by address code or address number orderly carrying out transmission feedback.
The external interface of 485 described buses is 485+, 485-and GND.
The present invention is by configuration file, and complete compatible market can adopt the light fixture of DMX512-A communication modes, range of application is wider.
Claims (4)
1. LED control bus means of communication, is characterized in that: the physical layer adopting 485 buses, utilize DMX512-A communications protocol autgmentability to be controlled in real time LED lamp by time-division half-duplex method and feed back;
Described is specifically carried out by time-division half-duplex method in the steps below by DMX512-A communications protocol autgmentability:
1., when frame rate is certain, in every 1 second, a 40ms is increased as data query Frame;
2., in data query Frame, Master controller sends inquiry to all Station controllers and to go on the air Frame, notifies that all Station controllers are prepared as uplink state and prepare one of them data query;
3. first Station controller after time delay a period of time to a state of this light fixture needed for Master controller feedback;
4. second Station controller is to a state of this light fixture needed for Master controller feedback after time delay a period of time, and delay time becomes multiple proportion with Station controller sequence number;
5. the feedback of all Station controllers is carried out successively;
6. Master controller is after wait-receiving mode exceedes certain hour, be defaulted as feedback to terminate, now Master controller sends poll-final broadcast Frame to all Station controllers, notifies that all Station controllers revert to the video flowing Frames that downstream state prepares to receive next second.
2. the LED control bus means of communication according to claim 1, is characterized in that: described frame rate is 15 frames/s-50 frame/s.
3. the LED control bus means of communication according to claim 1, is characterized in that: the described light fixture state feedback time adopts address code or address number binding constant time lag time to carry out transmission feedback.
4. the LED control bus means of communication according to the arbitrary claim of claim 1-3, is characterized in that: the external interface of 485 described buses is 485+, 485-and GND.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310156214.3A CN103249226B (en) | 2013-04-28 | 2013-04-28 | LED control bus communication method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310156214.3A CN103249226B (en) | 2013-04-28 | 2013-04-28 | LED control bus communication method |
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| Publication Number | Publication Date |
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| CN103249226A CN103249226A (en) | 2013-08-14 |
| CN103249226B true CN103249226B (en) | 2015-02-18 |
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| CN109743815A (en) * | 2019-02-01 | 2019-05-10 | 浙江晶日照明科技有限公司 | A kind of LED parameter setting system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441852A (en) * | 2008-12-29 | 2009-05-27 | 中国科学院长春光学精密机械与物理研究所 | Apparatus for collecting display parameter of LED display screen based on wireless digital transmission communication |
| CN101699923A (en) * | 2009-11-11 | 2010-04-28 | 广州中大中鸣科技有限公司 | Lighting control system based on DMX512 protocol and method thereof |
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2013
- 2013-04-28 CN CN201310156214.3A patent/CN103249226B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441852A (en) * | 2008-12-29 | 2009-05-27 | 中国科学院长春光学精密机械与物理研究所 | Apparatus for collecting display parameter of LED display screen based on wireless digital transmission communication |
| CN101699923A (en) * | 2009-11-11 | 2010-04-28 | 广州中大中鸣科技有限公司 | Lighting control system based on DMX512 protocol and method thereof |
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| CN103249226A (en) | 2013-08-14 |
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Address after: 313028 No. 2008, Fulu Road, East New District, Wuxing District, Huzhou City, Zhejiang Province Patentee after: Zhejiang Jingri Science and Technology Co., Ltd. Address before: 313000 Fulu Road 2008, East New District, Wuxing District, Huzhou City, Zhejiang Province Patentee before: Zhejiang Jingri Lighting Technology Co., Ltd. |