CN103249226A - LED control bus communication method - Google Patents
LED control bus communication method Download PDFInfo
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- CN103249226A CN103249226A CN2013101562143A CN201310156214A CN103249226A CN 103249226 A CN103249226 A CN 103249226A CN 2013101562143 A CN2013101562143 A CN 2013101562143A CN 201310156214 A CN201310156214 A CN 201310156214A CN 103249226 A CN103249226 A CN 103249226A
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- time
- feedback
- control bus
- led control
- light fixture
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
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 and control field, particularly a kind of LED control bus means of communication.
Background technology
At present, existing LED control system adopts the DMX512 bus mastering mode mostly, the communication of DMX512 control bus can only the 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 the light fixture state can't feed back.Process middle controller in control can't detect the state of LED light fixture, and the inefficacy of light fixture and fault are judged maintenance difficult, and controller also can't be made judgement intelligently, situation such as the not controlled or inefficacy of other light fixtures in the time of single-point can occurring and break down.For this reason, partial L ED control system is newly-increased independent control loop outside the DMX512 control bus, and in order to detect the light fixture state information, newly-increased control loop has not only increased the wiring complexity, and singly opening a bus has also increased cost.
Summary of the invention
The objective of the invention is to, a kind of LED control bus means of communication are provided.The present invention realizes real-time feedback and the control of data under the situation that does not increase outside line, not only guaranteed simple wiring, has also reduced production cost, safeguards to become convenient.
Technical scheme of the present invention: a kind of LED control bus means of communication is characterized in that: adopt the physical layer of 485 buses, utilize DMX512-A communications protocol autgmentability by time-division half-duplex method the LED light fixture to be controlled in real time and fed back.
In the aforesaid LED control bus means of communication, describedly specifically undertaken by following step by time-division half-duplex method with DMX512-A communications protocol autgmentability:
1. under the certain situation of frame rate, in per 1 second, increase a 40ms as data query Frame;
2. in data query Frame, the Master controller sends to all Station controllers and inquires about the Frame that goes on the air, and notifies all Station controllers to be prepared as uplink state and to prepare one of them data query;
3. first Station controller feeds back a state of this required light fixture to the Master controller after time-delay a period of time;
4. to a state of this required light fixture of Master controller feedback, delay time becomes multiple to concern with Station controller sequence number after time-delay a period of time for second Station controller;
5. carry out the feedback of all Station controllers successively;
6. the Master controller is after waiting for that reception surpasses certain hour, being defaulted as feedback finishes, this moment, the Master controller sent poll-final broadcasting Frame to all Station controllers, notified all Station controllers to 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 is to adopt address code or address number binding constant time lag time to transmit feedback.
In the aforesaid LED control bus means of communication, the external interface of described 485 buses is 485+, 485-and GND.
Compared with prior art, the present invention is by utilizing and improvement DMX512-A communications protocol, and realize real-time feedback and control to the light fixture state dexterously, at low cost by time-division half-duplex method, process middle controller in control can detect the state of LED light fixture, the inefficacy of light fixture and fault judge that maintenance becomes simple, controller also can be made judgement intelligently, situation such as not controlled or inefficacy of other light fixtures when having avoided single-point to break down.The present invention does not increase independent loop, but realizes at original circuit, makes wiring not become complicated, and cost also obtained effective control; The present invention is by increasing the data query Frame of a 40ms in 1s, human eye is imperceptible flicker, can not influence result of use.The present invention adopts the light fixture of DMX512-A communication modes on also can complete compatible market, and range of application is wider.
Embodiment
The present invention is further illustrated below in conjunction with embodiment, but not as the foundation to the present invention's restriction.
Embodiment.A kind of LED control bus means of communication adopt the physical layer of 485 buses, utilize DMX512-A communications protocol autgmentability by time-division half-duplex method the LED light fixture to be controlled in real time and fed back.
More excellent is, is describedly specifically undertaken by following step by time-division half-duplex method with DMX512-A communications protocol autgmentability:
1. be under the situation of 15 frames/s-50 frame/s in frame rate, in every 1s, increase a 40ms as data query Frame(frame); For example under the situation of 25 frames/s (being to play 25Frames in the 1s) increases a 40ms as data query Frame in per second, and the time that is equivalent to Frame1-Frame25 becomes 38.4ms;
2. in data query Frame, the Master controller sends to all Station controllers and inquires about the Frame that goes on the air, and notifies all Station controllers to be prepared as uplink state and to prepare one of them data query; Described data query can be current data;
3. first Station controller feeds back a state (electric current) of this required light fixture to the Master controller after time-delay a period of time;
4. to a state of this required light fixture of Master controller feedback, delay time becomes multiple to concern with Station controller sequence number (also can be address code or address number) after time-delay a period of time for second Station controller; For example: the delay time of this second Station controller is 2 times of first Station delaying time of controller time;
5. carry out the feedback of all Station controllers successively, finish feedback until last Station controller;
6. the Master controller is waiting for that reception surpasses certain hour and (is the wait time of reception of setting, can set according to actual conditions) after, being defaulted as feedback finishes, this moment, the Master controller sent poll-final broadcasting Frame to all Station controllers, notified all Station controllers to revert to the video flowing Frames that downstream state prepares to receive next second.
The described light fixture state feedback time is to adopt address code or address number binding constant time lag time to transmit feedback.The light fixture state feedback time that the described constant time lag time is preceding one-address code or address number and the summation of delay time; For example second light fixture state feedback time is the feedback time of first light fixture and the summation of delay time; The 3rd light fixture state feedback time is the feedback time of second light fixture and the summation of delay time; And the like.Thereby guarantee each light fixture by address code or address number orderly transmit feedback.
The external interface of described 485 buses is 485+, 485-and GND.
The present invention is by configuration file, adopts the light fixture of DMX512-A communication modes on can complete compatible market, and range of application is wider.
Claims (5)
1. LED control bus means of communication is characterized in that: adopt the physical layer of 485 buses, utilize DMX512-A communications protocol autgmentability by time-division half-duplex method the LED light fixture to be controlled in real time and fed back.
2. the LED control bus means of communication according to claim 1 is characterized in that, are describedly specifically undertaken by following step by time-division half-duplex method with DMX512-A communications protocol autgmentability:
1. under the certain situation of frame rate, in per 1 second, increase a 40ms as data query Frame;
2. in data query Frame, the Master controller sends to all Station controllers and inquires about the Frame that goes on the air, and notifies all Station controllers to be prepared as uplink state and to prepare one of them data query;
3. first Station controller feeds back a state of this required light fixture to the Master controller after time-delay a period of time;
4. to a state of this required light fixture of Master controller feedback, delay time becomes multiple to concern with Station controller sequence number after time-delay a period of time for second Station controller;
5. carry out the feedback of all Station controllers successively;
6. the Master controller is after waiting for that reception surpasses certain hour, being defaulted as feedback finishes, this moment, the Master controller sent poll-final broadcasting Frame to all Station controllers, notified all Station controllers to revert to the video flowing Frames that downstream state prepares to receive next second.
3. the LED control bus means of communication according to claim 2, it is characterized in that: described frame rate is 15 frames/s-50 frame/s.
4. the LED control bus means of communication according to claim 2 is characterized in that: the described light fixture state feedback time is to adopt address code or address number binding constant time lag time to transmit feedback.
5. according to the described LED control bus of the arbitrary claim of the claim 1-4 means of communication, it is characterized in that: the external interface of described 485 buses is 485+, 485-and GND.
Priority Applications (1)
| 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 |
|---|---|---|---|
| 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 true CN103249226A (en) | 2013-08-14 |
| CN103249226B CN103249226B (en) | 2015-02-18 |
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| CN201310156214.3A Active CN103249226B (en) | 2013-04-28 | 2013-04-28 | LED control bus communication method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103249226B (en) | 2015-02-18 |
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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. |
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