CN102186275B - Method and system for remotely and real-time playing and synchronously controlling light emitting diode (LED) lamp light - Google Patents
Method and system for remotely and real-time playing and synchronously controlling light emitting diode (LED) lamp light Download PDFInfo
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Abstract
The invention provides a method and a system for remotely and real-time playing and synchronously controlling light emitting diode (LED) lamp light. The method comprises the following steps of: setting a master control server and a plurality of branch control computers, and connecting the master control server with the branch control computers through a public internet; refreshing system clocks of the master control server and each branch control computer at the fixed time interval by using a global positioning system (GPS) synchronous clock; dividing a display interface of the master control server into a plurality of windows, wherein each window corresponds to a branch control computer, and a functional module in the master control server is used for copying pixel data of the windows from a display memory at a certain time interval; and playing sub-frame pictures according to frame sequence number of a sub-frame data packet and a frame playing moment by each branch control computer. According to the invention, the LED lamps in wide distribution area and large overall scale can be lightened, and the variation of the LED lamp light of each part of the landscape lighting lamp light can reach the synchronous variation effect of program frame level.
Description
Technical field
The present invention relates to LED lighting technology, specifically, relate to the long-range real-time broadcasting synchronisation control means of a kind of LED light and system.
Background technology
At present, LED has obtained application more and more widely in city lighting and Landscape Lighting engineering.When being on a grand scale of the LED in city brightening and Landscape Lighting engineering, when widely dispersed, such as the LED light engineering of the external wall elevation of up to a hundred building, whole engineering has likely exceeded the control ability of existing single led landscape lighting control system, this will consider that such engineering is divided into multiple relatively independent parts to be implemented, and how to the different piece of so large-scale LED brightening and the Landscape Lighting light engineering Synchronization Control that effectively links, be the technical barrier that current LED city lighting and Landscape Lighting industry face.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and can adjust the distance, scale all the entirety of unconfined LED brightening and Landscape Lighting light carry out effectively interlock and control, and make the synchronous method and system of variation of the LED light of each subsystem.
First the present invention provides a kind of LED light long-range real-time broadcasting synchronisation control means, and it comprises the following steps:
A master control server and some points of control computers are set, and they are connected by public internet;
Utilize GPS synchronised clock periodic refreshing master control server and Ge Tai sub-control system for computer clock;
" large window " of the display interface of master control server is divided into m is capable, n row, m × n " wicket " altogether, in master control server, functional module copies the pixel data of these " windows " from video memory according to certain time interval, the pixel data of each " window " that copy is obtained, as a subframe, sends to respectively a corresponding point of control computer for each subframe additional frame forms after moment, frame number and frame are play the moment as a sub-frame data bag; And
Each point of control computer play this subframe picture according to the frame number in sub-frame data bag and frame broadcasting moment.
It is to add system transmission lag in the frame formation moment of each sub-frame data bag that described frame is play the moment, add the running software overhead time and obtain, described system transmission lag is that the transmission lag data that each point control computer passed back are added up the maximum obtaining, and described transmission lag is that the current time comparison that the frame of the sub-frame data bag of receiving is formed moment and self system clock by each point of control computer obtains.
Described system transmission lag is not also made as temporarily 0 at master control server from every point of control computer obtains transmission lag.
The present invention provides a kind of LED light long-range real-time broadcasting synchronous control system in addition, comprises a master control server, some points of control computers and some GPS synchronised clocks.Described master control server is connected by public internet with described point of control computer; Described master control server comprises the first clock refresh module, the first communication interface modules, display interface module and packet creation module; Described the first clock refresh module connects GPS synchronised clock, utilizes GPS synchronised clock to refresh the system clock of master control server; Described the first communication interface modules is connected by public internet master control server with an each point control computer; Master control server display interface is divided into multiple " windows " by described display interface module, and timing copies the pixel data of each window from video memory; Described packet creation module connects display interface module and the first communication interface modules, the pixel data of each window that display interface module is provided is as a subframe, in each subframe, additional frame forms moment, frame number and frame and plays the moment, forms sub-frame data bag and sends to a point control computer; Every point of control computer comprises second clock refresh module, second communication interface module and Executive Module; Described second clock refresh module connects GPS synchronised clock, utilizes GPS synchronised clock to refresh sub-control system for computer clock; Described second communication interface module will divide control computer to be connected with master control server by public internet; Described Executive Module plays the moment according to the frame in sub-frame data bag and frame number copies the pixel data in this sub-frame data bag on display interface to, forms a frame of LED light control program.
Described master control server also comprises system transmission lag generation module, and system transmission lag generation module receives from the transmission lag data of each point of control computer, adds up, and obtains wherein maximum as system transmission lag; The described frame broadcasting moment equals to engrave and add system transmission lag in the time that frame forms, and adds the operation overhead time of software; Every point of control computer also comprises transmission lag generation module, this transmission lag generation module obtains the frame comprising the sub-frame data bag of sending from master control server and forms the moment, the current time of this moment and self system clock is compared, thereby obtain the transmission lag of this sub-frame data bag.
Described system transmission lag master control server also from every point control computer obtains transmission lag for being temporarily set as 0.
The advantage of the technical solution adopted in the present invention is:
(1) master control server is connected by public the Internet with many points of control computers, has avoided investment and the construction period of self-built control signal transmission network;
(2) master control server is all connected with a gps satellite synchronised clock with each main controller, thereby makes the various piece of system not be subject to the restriction of geographical position, scale all to obtain accurate clock, thereby keeps simultaneous operation.
(3) the image subframes packet that master control server is issued each point of control computer is all with temporal information and frame number, wraps in the uncertainty of the time delay of transmitting in the Internet and realizes the synchronous light program of playing interlock in each subsystem thereby make this system can overcome sub-frame data.
Below in conjunction with accompanying drawing, specific embodiment of the invention and technical advantage thereof are described further.
Accompanying drawing explanation
Fig. 1 shows the schematic flow sheet according to the long-range real-time broadcasting synchronisation control means of a kind of LED light of the present invention.
Fig. 2 shows the structural representation according to the long-range real-time broadcasting synchronous control system of LED light of the present invention.
Fig. 3 shows the logical relation schematic diagram according to the pixel data of master control server and each point of control computer in the long-range real-time broadcasting synchronous control system of LED light of the present invention.
Fig. 4 shows according to the detailed structural representation of the long-range real-time broadcasting synchronous control system of LED light of the present invention.
Embodiment
The long-range real-time broadcasting synchronisation control means of LED light of the present invention, large for scale, the Synchronization Control of the LED light engineering having a very wide distribution requires and proposes, and its key step can be with reference to figure 1.As shown in Figure 1, said method comprising the steps of: in step S1, a master control server is set, be that each scale is relatively little simultaneously, the LED light subsystem that concentrate relatively installation site arranges a point of control computer, and by public internet, master control server is connected with these point of control computer; In step S2, utilize GPS synchronised clock to refresh master control server and Ge Tai sub-control system for computer clock, make it to keep precise synchronization; In step 3, the display interface of master control server is divided into multiple windows, for example m × n " wicket " (press m is capable, n be listed as arrangement), make the corresponding point of control computer of each window, functional module in master control server copies the pixel data of these windows from its video memory according to certain time interval, using the pixel data of each window as a subframe, for forming after moment, frame number and frame are play the moment, each subframe additional frame sends to respectively corresponding point control computer as a sub-frame data bag; And in step S4, each point of control computer play this subframe picture according to the frame number of sub-frame data bag and frame broadcasting moment, forms a frame of LED light control program.
It is to add system transmission lag in the frame formation moment of each sub-frame data bag that described frame is play the moment, the time overhead of adding running software obtains, this system transmission lag is the maximum in the transmission lag passed back of each point control computer, and to be each point of control computer form the moment (claiming again " timestamp ") by the frame of the sub-frame data bag of having received to this transmission lag relatively obtains with current time.And the time overhead of running software can be with first estimating a higher value, then the method for progressively optimizing in the time that reality is debugged obtains.
Described system transmission lag master control server also from every point control computer obtains transmission lag for being made as temporarily 0.
When practical operation, might not strictly carry out by said sequence, for example, master control server and sub-control system for computer clock be refreshed at a certain time interval and repeated with the clock data of GPS synchronised clock, can carry out with other step simultaneously.
Hardware setting of the present invention is, first a LED Landscape Lighting engineering principle identical according to theme, that position is concentrated distributing is divided into multiple subsystems on a large scale, and each subsystem arranges a computer (hereinafter referred to as " point control computer ") and carries out centralized control.In this subsystem, " point control computer " adopts real-time Play Control mode to the control of the LED light fixture in this system, in this system, each in check LED light fixture is mapped as the one or more pixels on " point control computer " display interfaces, the color of controlled LED light fixture and corresponding pixel points and brightness preservation are synchronizeed and are changed, this controlling mechanism of subsystem can adopt existing techniques in realizing, as the VersaLink LED landscape lighting control system that adopts Shanghai Grand Canyon Opto-Tech Corp. just can the clog-free realization of milli control to the real-time broadcast mode of various types of LED light fixture in subsystem.
For realizing the interlock Synchronization Control to each subsystem LED light, one " master control server " is set on each subsystem, this server accessing Internet in some way, as optical fiber, ADSL, broadband, or be directly placed on Internet data center (IDC), and configure for it a fixing IP address.Respectively " divide control computer " also in a certain way, as ADSL accessing Internet." point control computer " will sign in to " master control server " after starting, and connect with it, and " master control server " just can be realized and being communicated by letter by the Internet with " point control computer " like this.
Whole system framework can be joined Fig. 2.As shown in Figure 2, comprise a master control server 10 and some points of control computers 20 according to system of the present invention, master control server 10 is connected by public internet 30 with a point control computer 20, and a point control computer 20 connects subsystem LED light fixture 50, system operating terminal 60 accessing Internets.Systems Operator can, by any computer access " master control server " joining with the Internet, realize operation, control to whole system.
The present invention is for making system simple and direct-viewing operation, and logical concept is clear, reaches the interlock control effect of " What You See Is What You Get ", and " master control server " adopts following mode Collaboration with " point control computer ".
With reference to Fig. 3.A specific embodiment is, the resolution of " master control server " display is made as to 1152 × 864, this display interface is divided into 162 " windows " that are of a size of 192Pixel × 32Pixel simultaneously, these " windows " are arranged by 27 row 6 row, be A11, A12, A13 by these window numbers ..., A1n ..., Amn ... wherein m represents row, and n represents row.
Equally, " point control computer " that in system, connect by the Internet and " master control server " is also numbered, and be numbered equally A11, A12, A13 ..., A1n ..., Amn, obviously, 162 of multipotency accesses of this system " point control computers ", the window of " point control computer " identical numbering of correspondence " master control server " of identical numbering.
When system enters after operating state, on the display interfaces of " master control server ", play LED light control program file, functional module in " master control server " is by the pixel data in certain frequency (as 25Hz) synchronized copy video memory, the pixel data that each copy video memory obtains is referred to as one " frame ", each frame pixel data is become to multiple " subframes " by the Range-partition of each " window ", after being added to additional information, the pixel data of " subframe " packs, compression, form by " sub-frame data bag ", issue " point control computer " of identical numbering, " point control computer " receives that after " sub-frame data bag ", decompress(ion) restores, copy a frame that becomes light control program on screen to ...Because " point control computer " is connected with institute controlled LED lamp tool by the LED control system such as the so real-time broadcasting of VersaLink, thereby send, be copied into pixel data screen by LED lamp luminescence variable color corresponding control from " master control server ".Because these pixel datas come from the different piece of the same light control program of playing on " master control server " display interface, this has just realized light interlock control of each subsystem naturally.
The object of scheme provided by the present invention not only will realize the interlock control of each subsystem LED light, and this interlock control must be also synchronous.Due to the feature of internet data communication, the packet that mails to " point control computer " from " master control server " may forward through the router of varying number, the route of each packet of issuing same " point control computer " is also not necessarily identical, so, " master control server " will there will be following situation with communicating by letter of each " point control computer ": 1, " master control server " will be decomposed into multiple " subframe " data from a frame pixel data of video memory copy, packing sends to each " point control computer " successively, there be the poor of front and back the time that each " sub-frame data bag " sends.2, the respectively position difference of " point control computer " accessing Internet, " transmission lag " time that the sub-frame data bag sending from " master control server " arrives different " point control computer " is different, not only to same " frame " data, " transmission lag " of different " point control computers " is different, and same " point control computer " receives the also possibility difference of delay of different " sub-frame data ", and, " frame " data that " master control server " sends in order, not likely to arrive " point control computer " by same order, " frame " data of sending out after may arrive prior to " frame " data of first sending out " point control computer " etc.
Therefore,, if do not take efficient system synchronisation measures, each " point control computer " can only, simply by " subframe " pixel data played in order successively receiving, will can not get the synchronous effect that between each subsystem, LED light is play.
The scheme of system synchronization that the present invention realizes is, for " master control server " and one " GPS synchronised clock " of each " point control computer " configuration, as shown in Figure 2, master control server 10 is all connected a GPS synchronised clock 40 with a point control computer 20, the common built-in high accuracy real-time clock of GPS synchronised clock 40, and receiving world locational system (GPS) send synchronizing signal second carry out synchronous calibration, thereby obtain accurate synchronised clock.The time data of GPS synchronised clock 40 can be exported by RS232 port, also can be by binding post with output of pulse signal.The clock synchronization accuracy of existing " GPS synchronised clock " has reached 0.1us rank, can meet 25 frames per second completely, and even the frame synchronization requirement of 50 frames per second (frame period is 40ms～20ms).
The further detailed construction of the long-range real-time broadcasting synchronous control system of LED light provided by the present invention can be with reference to Fig. 4.Described master control server 10 comprises the first clock refresh module 11, the first communication interface modules 14, display interface module 12, packet creation module 13, and system transmission lag generation module 15.Described the first clock refresh module 11 connects GPS synchronised clock 40, utilizes the system clock of the real-time clock Refresh Data master control server 10 that GPS synchronised clock 40 exports.Described the first communication interface modules 14 is connected by public internet 30 master control server 10 with each point control computer 20, this first communication interface modules 14 is offered a corresponding network service port for every point of control computer 20.Described display interface module 12 timings copy the pixel data in master control server 10 video memorys, and the frame pixel data that copy is obtained is divided into the pixel data of m × n " wicket ".Described packet creation module 13 connects display interface module 12 and the first communication interface modules 14, the pixel data of each window that display interface module 12 is provided is as a subframe, system transmission lag generation module 15 receives the transmission lag data from each point of control computer 20, gets by statistics wherein maximum as system transmission lag.
Packet creation module 13 additional " timestamp ", frame number and frame in subframe are play the moment, form sub-frame data bag.So-called " timestamp ", frame forms the moment, is the generation moment of " subframe ", particularly, is the moment of copy video memory.The object that comprises " timestamp " in " sub-frame data bag ", send to each point of control computer 20 " transmission lag " in order to make system can test " subframe " packet from master control server 10, and the time reference point of playing at point control computer 20 as " subframe ".
What need to emphatically point out is, " frame play moment " in " sub-frame data bag " is that point control computer 20 that master control server 10 is specified receives the moment of playing this frame after these frame data, and this moment must be later than point control computer 20 and receive the moment of these frame data.Because this moment is identical to all points of control computers 20, this can play with regard to guaranteeing all point control computers 20 each " subframe " picture that belongs to same frame (frame number is identical) simultaneously.
Here there is a specific question, not yet obtain " transmission lag " time from master control server to point control computer maximum at the initial period master control server 10 of system operation, i.e. " system transmission lag ", thereby cannot confirm " subframe is play the moment " of each subframe, at this moment system strategy is, master control server 10 is made as 0 by " system transmission lag ", " frame is play the moment " is also made as to 0 simultaneously, divide control computer 20 to receive after such " sub-frame data bag ", this subframe is play-overed to " transmission lag " numerical value of simultaneously unconditional this subframe of loopback.Like this, system, after experience " asynchronous " state of blink, will soon enter " synchronously " broadcast state.
In addition, several Key details of also wanting taking into account system to realize: the uncertainty of " transmission lag " of (1) system is except causing because of the transmission mechanism of the Internet, also have the factor of application software expense running time, and the factor of the Task Scheduling Mechanism of non real-time computer operating system.Therefore, each point of control computer 20 should be selected same configuration, and same operating system is installed, and do not move other irrelevant softwares, to guarantee the consistency of each subsystem application software running environment.(2) computer of configuration high-speed is made master control server 10 and point control computer 20 as far as possible, shortens the time overhead of running software links, and this will directly be conducive to improve the real-time synchronization control effect of whole LED lighting system.(3) divide control computer 20 should have enough large internal memory and hard drive space to carry out buffer memory " sub-frame data bag ", and " system transmission lag " is larger, the space requirement of this buffer area is larger.(4) press this programme, the program broadcasting that the program of master control server 10 is played to point control computer 20 has a delay, and the program that point control computer is 20 is play can keep synchronous.Because " system transmission lag " in fact depends on the maximum delay of master control server 10 to all points of control computers 20, therefore, the network quality that should as far as possible improve master control server 10 and point control computer 20 accessing Internets, improves bandwidth, to reduce " system transmission lag ".(5) excessive if any " transmission lag " of indivedual subsystems, will tie down the net synchronization capability of whole system, so in the time that " transmission lag " of certain subsystem is greater than certain preset value, master control server 10 is answered synchronous to this system of automatic pause, suspending synchronous method can adopt " subframe is play the moment " of issuing in " the sub-frame data bag " of this subsystem is made as to 0, in the time that " propagation delay " of this subsystem returns to below preset value, master control server 10 recovers synchronous to this subsystem again.(6) whole system is on the Internet based on public, for guaranteeing system safety, prevent that " hacker " attacks, master control server 10 and each point of control computer 20 all should dispose certain network security measure, as fire compartment wall is installed, entry password is all established in the login of internal system, and various packets are all with safety check password ..., etc.
Technical scheme provided by the present invention has solved all Coupled motion control problem of unconfined LED brightening and Landscape Lighting light of distribution, system scale, makes the variation of the LED light of each subsystem reach the synchronous effect of program " frame " rank.
Certainly, above is only concrete exemplary applications of the present invention, and protection scope of the present invention is not constituted any limitation.In addition to the implementation, the present invention can also have other execution mode, and the number of windows that for example display interface contains can be that other numerical value, frame broadcasting moment can be in the time that frame forms, to engrave an additional fixed value all the time.All employings are equal to the technical scheme of replacement or equivalent transformation formation, within all dropping on the present invention's scope required for protection.
Claims (3)
1. the long-range real-time broadcasting synchronisation control means of LED light, is characterized in that, it comprises the following steps:
A master control server and some points of control computers are set, and they are connected by public internet;
Utilize GPS synchronised clock with regular time interval refresh master control server and Ge Tai sub-control system for computer clock;
The display interface of master control server is divided into multiple windows, make the corresponding point of control computer of each window, functional module in master control server copies the pixel data of these windows from its video memory according to certain time interval, using the pixel data in each window as a subframe, for forming after moment, frame number and frame are play the moment, each subframe additional frame sends to respectively corresponding point control computer as a sub-frame data bag; And
Each point of control computer play this subframe picture according to the frame number of sub-frame data bag and frame broadcasting moment,
It is to form the moment at the frame of each sub-frame data bag to add system transmission lag that described frame is play the moment, add running software time overhead and obtain,
Described system transmission lag is that the transmission lag numerical value that master control server is passed back each point control computer is added up the maximum obtaining,
Described transmission lag is that the current time that the frame in the sub-frame data bag of receiving is formed moment and self system clock by each point of control computer relatively obtains.
2. the long-range real-time broadcasting synchronous control system of LED light, comprises a master control server, some points of control computers and some GPS synchronised clocks, it is characterized in that,
Described master control server is connected by public internet with described point of control computer;
Described master control server and described point of control computer, be all directly connected with a GPS synchronised clock,
Described master control server comprises the first clock refresh module, the first communication interface modules, display interface module, and packet creation module, described the first clock refresh module connects GPS synchronised clock, utilizes GPS synchronised clock to refresh the system clock of master control server, described the first communication interface modules is connected by public internet master control server with an each point control computer, master control server display interface is divided into multiple windows by described display interface module, and timing copies its video memory and obtain the pixel data of each window, described packet creation module connects display interface module and the first communication interface modules, using the pixel data of the each window in display interface module as a subframe, in each subframe, additional frame forms moment, frame number and frame and plays the moment, forms sub-frame data bag, sub-frame data bag is sent to a point control computer by described the first communication interface modules, the described frame broadcasting moment forms the moment by frame, add system transmission lag, add running software time overhead and obtain, described master control server also comprises system transmission lag generation module, system transmission lag generation module receives the transmission lag data from each point of control computer, statistics is obtained wherein maximum as system transmission lag, every point of control computer also comprises transmission lag generation module, in the time that a point control computer is received a sub-frame data bag, described transmission lag generation module obtains the frame comprising in sub-frame data bag and forms the moment, this frame is formed to moment and current time comparison, obtain transmission lag, and again by the loopback of transmission lag data to master control server.
3. the long-range real-time broadcasting synchronous control system of LED light according to claim 2, is characterized in that, every point of control computer comprises second clock refresh module, second communication interface module, and Executive Module; Described second clock refresh module connects GPS synchronised clock, utilizes GPS synchronised clock to refresh sub-control system for computer clock; Described second communication interface module will divide control computer to be connected with master control server by public internet, receive the sub-frame data bag that master control server is sent; Described Executive Module is arranged the subframe of receiving according to the frame number in sub-frame data bag in buffer queue, and plays the moment according to the frame of sub-frame data bag this subframe picture is played on display interface.
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| CN201110034285.7A CN102186275B (en) | 2011-02-01 | 2011-02-01 | Method and system for remotely and real-time playing and synchronously controlling light emitting diode (LED) lamp light |
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| CN201110034285.7A CN102186275B (en) | 2011-02-01 | 2011-02-01 | Method and system for remotely and real-time playing and synchronously controlling light emitting diode (LED) lamp light |
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