CN102098838A - LED control method and equipment - Google Patents
LED control method and equipment Download PDFInfo
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- CN102098838A CN102098838A CN2010106095670A CN201010609567A CN102098838A CN 102098838 A CN102098838 A CN 102098838A CN 2010106095670 A CN2010106095670 A CN 2010106095670A CN 201010609567 A CN201010609567 A CN 201010609567A CN 102098838 A CN102098838 A CN 102098838A
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses an LED control method and equipment. The LED control equipment comprises a PC (Personal Computer), a master controller and a plurality of branch controllers; the plurality of branch controllers are connected in series with the master controller; the PC is connected with the master controller; and the branch controllers are used for controlling LEDs. By applying the technical scheme, the plurality of branch controllers are connected in series with the master controller, when a branch controller is additionally provided, the branch controller is needed to match with an impedor of a device arranged at the front end of the branch controller, but not needed to match with impedors of all devices, therefore, the connection number of the branch controllers is increased, and the mounting distance of the LEDs is further increased.
Description
Technical field
The present invention relates to the LED equipment technical field, relate in particular to a kind of LED control method and equipment.
Background technology
At present, cheap and be easy to a series of advantage such as networking based on the communication mode of RS485 because of it, be widely used in the various industrial control systems.Such as: the LED control appliance.
The LED control appliance adopts RS485 as main controller, and main controller is transferred to the iversion controller that links to each other with main controller respectively in the equipment, again the signal controlling LED that is received by the iversion controller foundation after its signal that obtains from main frame is discerned.
In theory, can articulate a plurality of iversion controllers on the RS485 interface bus, such as: the RS485 with special chip can articulate 256 iversion controllers.Yet, really not so in actual use.Because iversion controller links to each other with main controller respectively, so the device matching that iversion controller of every increase need be all with its front end promptly can influence the coupling of impedance on the whole communication line.As everyone knows, when the impedance matching of input on the communication line and output, communication could realize.That is to say iversion controller of every increase, need with the impedance matching of its all devices of front end, communication could realize.But, when the quantity of the iversion controller that main controller connected is increased to some, such as: the applicant finds after deliberation, when the quantity of the iversion controller that main controller connected reaches 7, can cause that impedance does not match on the whole communication line, cause communication normally to carry out, limited the transmission range of signal, and then the mounting distance of LED.Therefore, be badly in need of a kind of LED control appliance, further increase the mounting distance of LED to increase the quantity of iversion controller.
Summary of the invention
In view of this, the invention provides a kind of LED control method and equipment, link to each other with main controller respectively owing to iversion controller to solve in the existing equipment, cause when the quantity of iversion controller is increased to some, can cause that impedance does not match on the whole communication line, cause communication normally to carry out, limited transmission range, and then the problem of restriction LED mounting distance.The concrete scheme of a kind of LED control method provided by the present invention and equipment is as follows:
A kind of LED control appliance comprises PC, main controller and a plurality of iversion controller, and described a plurality of iversion controllers are connected with described main controller, and described PC links to each other with described main controller, and described iversion controller is used for LED is controlled.
Preferably, described main controller and described iversion controller comprise: controller, a RS485 and the 2nd RS485; Wherein:
A described RS485 links to each other with described controller respectively with described the 2nd RS485.
Preferably, being connected to of described adjacent two iversion controllers: the 2nd RS485 of the iversion controller of front end connects a RS485 of rear end iversion controller.
Preferably, also comprise: be connected the router between described PC and the described main controller.
Preferably, described iversion controller also comprises: inside is provided with the slave controller of initial control signal, be used for when the rear end iversion controller does not receive that the number of times of the inverse signal of front end iversion controller surpasses preset times, the initial control signal that sends setting in it is to the rear end iversion controller.
Preferably, described iversion controller also comprises: the fault transmitter, be used for when number of times that the front end iversion controller does not receive the cue of rear end iversion controller surpasses preset times, sending off-lined signal, send to PC after adding identification signal by described main controller to main controller ID number to main controller.
Preferably described controller is single-chip microcomputer or random access memory ram or EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM.
The embodiment of the invention also provides a kind of LED control method, comprising:
Main controller receives the control signal that PC sends, and the frame type entrained according to control signal draws identification signal to described control signal analysis, sends identification signal;
Iversion controller receives identification signal, with reference to identification signal LED is controlled.
Preferably, iversion controller receives identification signal, also comprises after with reference to identification signal LED being controlled:
Rear end iversion controller transmitting line request signal is given the front end iversion controller;
The inverse signal of the correspondence that rear end iversion controller receiving front-end iversion controller sends;
When the number of times that does not receive described inverse signal when described rear end iversion controller surpassed preset times, the rear end iversion controller sent initial control signal all iversion controllers to the rear end;
The rear end iversion controller is controlled LED according to initial control signal.
Preferably, the rear end iversion controller also comprises after the control LED according to initial control signal:
When the circuit query signal that the front end iversion controller does not receive the rear end iversion controller surpasses preset times, send off-lined signal to main controller;
Main controller encapsulates and sends to PC after receiving off-lined signal again.Wherein: main controller is encapsulated into self main controller ID number and sends to PC in the off-lined signal.
Use technique scheme, a plurality of iversion controllers are connected with main controller, during iversion controller of every increase, iversion controller needs the impedance matching with a device of its front end, and does not need the impedance matching with all devices, therefore, increase the number of connection of iversion controller, further increased the mounting distance of LED.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the LED control appliance that Fig. 1 provides for the embodiment of the invention;
The LED control appliance assembly drawing that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is the PWM light adjusting circuit;
Fig. 4 is a kind of structural representation of iversion controller among Fig. 1;
Fig. 5 is the another kind of structural representation of iversion controller among Fig. 1;
The flow chart of the LED control method that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The applicant finds that after deliberation main controller adopts mode in parallel with iversion controller in the present LED control appliance.As everyone knows, when circuit is in parallel, during device of the every increase of output, the impedance meeting of newly-increased device causes the output impedance to change, if guarantee normal operation circuit, must guarantee sending-end impedance and output impedance matching, and then the impedance of the newly-increased device of restriction.Equally, for the LED control appliance, iversion controller of every increase, terminal impedance does not match before can causing, and then can't communicate.Through repeatedly practice, the applicant finds, when the quantity of the iversion controller that main controller connected reaches 7, can cause that impedance does not match on the whole communication line, causes communication normally to carry out, and limited transmission range, and then the mounting distance of LED.
In order to address the above problem, the embodiment of the invention provides a kind of LED control appliance, and structural representation comprises PC 1, main controller 2 and a plurality of iversion controller 3 as shown in Figure 1; Wherein: main controller 2 links to each other with PC 1, and main controller 2 and iversion controller 3 changes original mode that is connected in parallel, and changes by the relaying mode that is connected in series, and promptly a plurality of iversion controllers 3 are cascaded with main controller 2.Main controller 2 receives the control signal that PC sends, frame type analyze entrained according to control signal draws identification signal, and the transmission identification signal is to the iversion controller 3 of back level, the iversion controller 3 of back level sends identification signal to the next iversion controller 3 of series connection with it again, identification signal is transmitted between iversion controller 3 successively, according to identification signal LED is controlled sub-controller 3 LED of control or one group of LED again by iversion controller 3.For the connected mode of iversion controller 3 and main controller 2 is described, the number of iversion controller 3 is 3, certainly, and more than 3 of the number of the actual iversion controller 3 that connects.LED control appliance assembly drawing sees also Fig. 2, as can be seen from Figure 2, the mode that main controller 2 and iversion controller 3 are connected for relaying, each iversion controller 3 is used to control a LED.Such as: the operating time of the switching of control LED, the brightness of regulating LED and control LED etc.
The technology that brightness is regulated to LED at present mainly contains three kinds: simulation light modulation, PWM (Pulse Width Modulation, pulse width modulation) light modulation and digital dimming.The simulation light modulation is by the resistance of adjusting serial or parallel connection resistance, changes the electric current by LED, thereby changes the brightness of LED.The PWM dimming mode be a kind of with the repetition pulse sequence as control signal, the control led driver is opened and is disconnected, and then the light regulating technology of control LED, only need provide wide, narrow different digital type pulse, can realize changing output current simply, thereby regulate the brightness of LED.The advantage of PWM light modulation is high-quality cold light can be provided, and uses simply the efficient height.What native system adopted is the PWM light modulation.The circuit diagram of PWM light modulation as shown in Figure 3.
Brightness adjustment control among the PWM light adjusting circuit figure shown in Figure 3 is to have adopted photoelectric coupled circuit and MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide half field effect transistor) realizes, comprising: first resistance 11, power supply 12, photoelectric coupled circuit 13, voltage stabilizing didoe 14, second resistance 15 and the MOSFET16.MOSFET is a voltage control unipolarity mos field effect transistor, required driving power is less, and MOSFET has only majority carrier to participate in conduction, does not have the recombination time of minority carrier, thereby switching frequency can be very high, is particularly suitable as PWM controlling and driving switch.For this reason, the MOSFET16 among Fig. 3 is N-channel MOS FET, the conducting voltage Vgs of N-channel MOS FET＞=5V.Wherein: first resistance 11 is connected between the input of power supply 12 and photoelectric coupled circuit 13, and another input linking number word pulse of photoelectric coupled circuit 13 is the control signal that iversion controller 3 sends in embodiments of the present invention.Two outputs of photoelectric coupled circuit 13 connect the anode and second resistance 15 of voltage stabilizing didoe 14 respectively.The negative electrode of voltage stabilizing didoe 14 connects the output of photoelectric coupled circuit 13 and the tie point of second resistance 15.The S utmost point of MOSFET16 connects the anode of voltage stabilizing didoe 14, and the G utmost point connects the negative electrode of voltage stabilizing didoe 14, and the D utmost point connects the negative electrode of LED.The anode of LED connects second resistance 15, and an end that is connected with second resistance 15 does not connect the output of photoelectric coupled circuit 13.Its concrete light modulation process is: when PWM1=1, photoelectric coupled circuit 13 is ended, because the Vce=9.1V of photoelectric coupled circuit 13, the G utmost point of MOSFET16 connects high level, Vgs＞5V, and LED is lighted in the MOSFET16 conducting.When PWM1=0, photoelectric coupled circuit 13 conductings, the Vce=0V of photoelectric coupled circuit 13, the G utmost point of MOSFET16 connects low level, Vgs=0V, MOSFET16 stopping LED.Because the PWM frequency is very high, the pulse duty factor by changing PWM1 is to reach the purpose of regulating brightness.
The frame structure of the control signal that main controller 2 receives is as shown in table 1.
Table 1 control signal frame structure
| Sequence number | Title | Length (byte) | Content |
| 0 | |
1 | STX(0x02) |
| 1 | |
1 | See the |
| 2 | |
2 | The length of |
| 3 | Frame data | n | |
| 4 | Verification and | 1 | Verification from the frame head to frame data and |
| 5 | |
1 | ETX(0x03) |
The type of the frame structure analysis control signal that main controller 2 carries according to control signal.For example: frame type is 0x41, and the expression control signal is the brightness value of the single light fixture of adjusting, and frame type is 0x42, and the expression control signal is to regulate the brightness value of the light fixture in a zone.
Need to prove: main controller 2 is when receiving control signal, whether frame head, frame type, data length and the frame data sum of judging signal with verification with equate, if equate, then the control signal that receives of expression is correct, correct frame is labeled as 1, and backs up this data.When main controller 2 judged that its time that does not receive signal surpasses Preset Time, the expression signal received.At this moment, main controller 2 begins control signal is analyzed.
Reverse data transmission (the rear end forward end sends data): the controller of rear end iversion controller 3 sends to self response signal the 2nd RS485 of front end iversion controller 2 by a RS485.Front end iversion controller 2 receive after this response signal to its judge with control example as: whether the identification response signal effective, when response signal is effective, judge signal type, and this response signal sent to the iversion controller 2 of its front end by self a RS485, according to aforesaid way until sending to main controller 2.
Certainly, iversion controller 2 can also comprise the 3rd RS485 in the LED control appliance that the embodiment of the invention provides, as standby RS485.When a RS485 or the 2nd RS485 break down, replace by standby RS485.Controller can be single-chip microcomputer or RAM (Random Access Memory, random asccess memory) or EEPROM (Electrically Erasable Programmable Read-Only Memory, EEPROM (Electrically Erasable Programmable Read Only Memo)).
Well-known, in actual environment for use such as vcehicular tunnel in, the LED control appliance need be controlled the LED of many circuits, in each circuit by 3 controls of a main controller 2 and a plurality of iversion controller.Owing to have many circuits, 1 pair of control signal difference that every circuit sent of PC, at this moment, in order to transmit control signal that PC 1 sends to corresponding main controller 2, the LED control appliance that the embodiment of the invention provided also comprises: be connected the router four between PC 1 and the main controller 2, as shown in Figure 5.In the LED control appliance shown in Figure 5 PC 1, main controller 2 and iversion controller 3 be connected with structure and LED control appliance shown in Figure 1 in being connected and constructing identically of PC 1, main controller 2 and iversion controller 3, this is no longer set forth.Router four is used for control signal is analyzed, and judges the pairing main controller 2 of this control signal, and sends to corresponding main controller 2.
Be adjusted to example with single light fixture and introduce LED control appliance shown in Figure 1 control LED.The data of supposing the control signal that router four receives are: 02 41 04 00 00 02 00 50 99 03, wherein: 02 is frame head, 41 is frame type, and the expression control signal is single lamp light modulation, and 04 00 is frame data length-4 byte, 00 is-No. 0 main controller of main controller numbering, 02 00 are light fixture numbering-2 signal lamp tools, 50 for lamp brightness-be adjusted to 80%, 99 for verification and, the data that expression receives are correct, and 03 is postamble.After router four receives this control signal, discern the control signal that this control signal is No. 0 main controller 2, therefore, this control signal is sent to main controller 2 No. 0.Main controller 2 receives this control signal, it is analyzed obtain identification signal, and identification signal is sent to iversion controller 3.Iversion controller 3 is analyzed after receiving this identification signal.The iversion controller 3 that is used to control No. 2 LED is analyzed and drawn this identification signal is that its No. 2 LED that control are carried out light modulation, and with brightness regulation to 80%, therefore, iversion controller 3 is regulated the brightness to 80% of No. 2 LED according to this identification signal.
In addition, the communication of circuit sometimes can be interrupted, and causes iversion controller 3 can't receive control signal, and then can't control LED again.For can't controlling of preventing that communication disruption from causing, also comprise in the iversion controller 3 in the LED control appliance LED: slave controller, as shown in Figure 5.Be provided with initial control signal in the slave controller, be used for when rear end iversion controller 3 does not receive that the number of times of the inverse signal of front end iversion controller 3 surpasses preset times, the initial control signal that rear end iversion controller 3 sends setting in it is to all iversion controllers 3 in its rear end, and all iversion controllers 3 in its rear end are controlled LED according to initial control signal.Initial control signal is in the embodiment of the invention: with the brightness regulation to 100% of LED.On the other hand for notify PC herein communication line disconnect, iversion controller 3 also comprises: the fault transmitter, as shown in Figure 5.The fault transmitter is used for sending off-lined signal to main controller when number of times that the front end iversion controller does not receive the cue of rear end iversion controller surpasses preset times, and off-lined signal comprises ID number and the state of current light fixture of iversion controller.Main controller receives and identifies after this signal, adds main controller and encapsulates and send to PC again ID number, communication failure occurs so that PC is known which position of which bar circuit.
Use technique scheme, a plurality of iversion controllers 3 are connected with main controller 2, during iversion controller 2 of every increase, iversion controller 2 needs the impedance matching with a device of its front end, and do not need impedance matching with all devices, therefore, increase the number of connection of iversion controller 2, further increased the mounting distance of LED.
In addition, when the communication disruption between rear end iversion controller 3 and the leading portion iversion controller 3, send initial control signal control LED to all thereafter iversion controller, realize after the communication disruption control LED by the rear end iversion controller.Simultaneously, the front end iversion controller sends off-lined signal to main controller, main controller receives and adds corresponding information after this signal and encapsulate again and send to PC, communication failure occurs so that PC is known which position of which bar circuit, and then is convenient to the maintenance to communication line.
Corresponding with the foregoing description, the embodiment of the invention also provides a kind of LED control method, and flow chart comprises as shown in Figure 6:
S101: main controller receives the control signal that PC sends, and the frame type entrained according to control signal draws identification signal to described control signal analysis, sends identification signal; Wherein: main controller is when receiving control signal, and whether frame head, frame type, data length and the frame data sum of judging signal with verification with equate, if equate, then the control signal that receives of expression is correct, correct frame is labeled as 1, and backs up this data.When main controller judged that its time that does not receive signal surpasses Preset Time, the expression signal received.At this moment, main controller begins control signal is analyzed.
S102: iversion controller receives identification signal, with reference to identification signal LED is controlled.
S103: rear end iversion controller forward end iversion controller sends feedback signal;
When rear end iversion controller and front end iversion controller communication disruption, the rear end iversion controller can't receive control signal, and then can't control LED again.Can't control LED for fear of the rear end iversion controller that communication disruption caused, the LED control method that the embodiment of the invention provides also comprises:
S104: rear end iversion controller transmitting line request signal is given the front end iversion controller;
S105: the inverse signal of the correspondence that rear end iversion controller receiving front-end iversion controller sends;
S106: when the number of times that does not receive described inverse signal when described rear end iversion controller surpassed preset times, the rear end iversion controller sent initial control signal all iversion controllers to the rear end;
S107: the rear end iversion controller is controlled LED according to initial control signal.
In addition, after communication disruption, know that for the ease of PC communication failure appears in which position of which bar circuit, the LED control method that the embodiment of the invention provides also comprises:
S108: when the circuit query signal that the front end iversion controller does not receive the rear end iversion controller surpasses preset times, send off-lined signal to main controller.Off-lined signal comprises ID number and the state of current light fixture of iversion controller.
S109: main controller encapsulates and sends to PC after receiving off-lined signal again.Wherein: main controller is encapsulated into self main controller ID number and sends to PC in the off-lined signal.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
The professional can also further recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a LED control appliance comprises PC, main controller and a plurality of iversion controller, it is characterized in that, described a plurality of iversion controllers are connected with described main controller, and described PC links to each other with described main controller, and described iversion controller is used for LED is controlled.
2. LED control appliance according to claim 1 is characterized in that, described main controller and described iversion controller comprise: controller, a RS485 and the 2nd RS485; Wherein:
A described RS485 links to each other with described controller respectively with described the 2nd RS485.
3. LED control appliance according to claim 2 is characterized in that, being connected to of described adjacent two iversion controllers: the 2nd RS485 of the iversion controller of front end connects a RS485 of rear end iversion controller.
4. LED control appliance according to claim 1 is characterized in that, also comprises: be connected the router between described PC and the described main controller.
5. LED control appliance according to claim 4, it is characterized in that, described iversion controller also comprises: inside is provided with the slave controller of initial control signal, be used for when the rear end iversion controller does not receive that the number of times of the inverse signal of front end iversion controller surpasses preset times, the initial control signal that sends setting in it is to the rear end iversion controller.
6. LED control appliance according to claim 5, it is characterized in that, described iversion controller also comprises: the fault transmitter, be used for when number of times that the front end iversion controller does not receive the cue of rear end iversion controller surpasses preset times, send off-lined signal to main controller, send to PC after adding identification signal by described main controller to main controller ID number.
7. according to any described LED control appliance of claim 1-6, it is characterized in that described controller is single-chip microcomputer or random access memory ram or EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM.
8. a LED control method is characterized in that, comprising:
Main controller receives the control signal that PC sends, and the frame type entrained according to control signal draws identification signal to described control signal analysis, sends identification signal;
Iversion controller receives identification signal, with reference to identification signal LED is controlled.
9. LED control method according to claim 8 is characterized in that, iversion controller receives identification signal, also comprises after with reference to identification signal LED being controlled:
Rear end iversion controller transmitting line request signal is given the front end iversion controller;
The inverse signal of the correspondence that rear end iversion controller receiving front-end iversion controller sends;
When the number of times that does not receive described inverse signal when described rear end iversion controller surpassed preset times, the rear end iversion controller sent initial control signal all iversion controllers to the rear end;
The rear end iversion controller is controlled LED according to initial control signal.
10. LED control method according to claim 9 is characterized in that, the rear end iversion controller also comprises after the control LED according to initial control signal:
When the circuit query signal that the front end iversion controller does not receive the rear end iversion controller surpasses preset times, send off-lined signal to main controller;
Main controller encapsulates and sends to PC after receiving off-lined signal again.Wherein: main controller is encapsulated into self main controller ID number and sends to PC in the off-lined signal.
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| CN102769971A (en) * | 2012-07-02 | 2012-11-07 | 上海广茂达光艺科技股份有限公司 | Field bus control system for intelligent light-emitting diode (LED) lamp |
| CN102769971B (en) * | 2012-07-02 | 2016-09-28 | 上海广茂达光艺科技股份有限公司 | Field bus control system for LED intelligent lamp |
| CN102905433A (en) * | 2012-10-16 | 2013-01-30 | 常州市城市照明工程有限公司 | Multi-compatible LED (Light Emitting Diode) lighting control system |
| CN103678232A (en) * | 2013-12-01 | 2014-03-26 | 国家电网公司 | RS485 signal forwarding device |
| CN107072003A (en) * | 2017-04-13 | 2017-08-18 | 北京富润成照明***工程有限公司 | The real-time self-checking feedback system of efficient lamp control |
| CN107072003B (en) * | 2017-04-13 | 2019-10-18 | 北京富润成照明***工程有限公司 | The real-time self-checking feedback system of efficient lamp control |
| CN107949106A (en) * | 2017-11-23 | 2018-04-20 | 卫星电子（中山）有限公司 | A kind of dimming control system with silicon-controlled Small conduction angle adjusting pulsewidth |
| CN108198533A (en) * | 2018-02-06 | 2018-06-22 | 湖北亿伟照明科技有限公司 | A kind of building light intelligent control method |
| CN109993958A (en) * | 2019-05-08 | 2019-07-09 | 深圳市共济科技股份有限公司 | A kind of data collection system and method for RS485 bus |
| CN116602265A (en) * | 2023-05-25 | 2023-08-18 | 北京工业大学 | Intelligent control system and method for building keloid animal model |
| CN116602265B (en) * | 2023-05-25 | 2024-05-14 | 北京工业大学 | Intelligent control system and method for building keloid animal model |
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| CN102098838B (en) | 2013-08-28 |
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