CN112533334A - Lighting control method, power box, lighting terminal and system based on power supply line - Google Patents
Lighting control method, power box, lighting terminal and system based on power supply line Download PDFInfo
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- CN112533334A CN112533334A CN202011483318.1A CN202011483318A CN112533334A CN 112533334 A CN112533334 A CN 112533334A CN 202011483318 A CN202011483318 A CN 202011483318A CN 112533334 A CN112533334 A CN 112533334A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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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 application relates to a lighting control method, a power supply box, a lighting terminal and a system based on a power supply line, belonging to the field of lighting control, wherein the power supply box can obtain frequency influence information and amplitude influence information of the power supply line, reasonably determine signal frequency information and signal amplitude information according to the frequency influence information and the amplitude influence information, when constructing a voltage sequence reflecting a lighting control command, determine the period duration of the voltage sequence based on the signal frequency information, determine the amplitude difference between the high level and the low level of the voltage sequence based on the signal amplitude information, thereby enabling the voltage sequence to be accurately identified under the interference in the power supply line, improving the transmission efficiency of the voltage sequence, providing more stable power supply for the lighting terminal, accurately analyzing the voltage sequence in the power supply line to obtain the lighting control command, and accurately controlling the lighting terminal.
Description
Technical Field
The application relates to the field of lighting control, in particular to a street lamp control method, a power box, a lighting terminal and a system based on a power supply line.
Background
The lighting terminals mostly adopt a centralized power supply and control mode, taking street lamps as an example, the street lamps on a section of road generally adopt the centralized power supply and control mode to supply power and control the street lamps.
In a street lamp control system with direct current centralized power supply, a novel street lamp control mode is to control street lamps by using a power supply line. Reference is made to the chinese patent publication No. CN103763833B, which discloses a control method for controlling LED street lamps based on power supply lines. In the method, a power supply box converts the illumination control command into a voltage sequence with variable amplitude, and a street lamp unit analyzes the voltage sequence to obtain the control command carried by the voltage sequence, so that the street lamp is controlled based on the control command.
For the related technologies, the inventor considers that the manner of transmitting the illumination control command based on the voltage sequence in the related technologies is easily interfered, and the street lamps are difficult to accurately obtain the voltage sequence, which is not beneficial to accurately controlling each street lamp.
Disclosure of Invention
In order to accurately control each lighting terminal, the application provides a lighting control method, a power supply box, a lighting terminal and a system based on a power supply circuit.
In a first aspect, the application provides a lighting control method based on a power supply line. The method comprises the following steps:
acquiring frequency influence information and amplitude influence information of a power supply line;
determining signal frequency information according to the frequency influence information, and determining signal amplitude information according to the amplitude influence information;
when an illumination control command is received, converting the illumination control command into a voltage sequence with variable amplitude, wherein a first voltage amplitude in the voltage sequence corresponds to a high level, and a second voltage amplitude corresponds to a low level; the first voltage amplitude is greater than the second voltage amplitude, and the difference between the first voltage amplitude and the second voltage amplitude is determined by signal amplitude information; the voltage sequence is used for outputting to the power supply line;
the voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits which are sequentially arranged; the start bit and the synchronous bit are identified by instantaneous signals, the time interval between the start bit and the synchronous bit is used for identifying the period duration of the voltage sequence, and the duration of each data bit is the period duration; the cycle duration is determined by the signal frequency information.
By adopting the technical scheme, the signal frequency information and the signal amplitude information are determined according to the frequency influence information and the amplitude influence information of the power supply line, so that when a voltage sequence is constructed according to the illumination control command, the difference between the first voltage amplitude and the second voltage amplitude is determined according to the signal amplitude information, and the continuous period duration of the data bit is determined according to the signal frequency information. The period and the amplitude of the voltage sequence reasonably determined based on the condition of the power supply line can be clear under the condition that the voltage sequence has interference and can be accurately identified, the influence of the voltage sequence on the stability of the voltage amplitude in the power supply line can be reduced, the transmission speed of the voltage sequence is improved, and the transmission cost of the voltage sequence is reduced.
Optionally, the frequency influence information includes load size information, line resistance information, and line capacitive reactance information.
Optionally, the amplitude influence information includes device interference information.
Optionally, the start bit is a falling edge signal, and the synchronization bit is a rising edge signal.
Optionally, there is a space bit between the synchronization bit and the first data bit lasting for one period of time.
In a second aspect, the present application provides another lighting control method based on power supply lines. The method comprises the following steps:
determining the period duration according to the instantaneous signals of the start bit and the synchronization bit which are acquired in sequence;
acquiring the voltage amplitude specified times of the power supply circuit by taking the period duration as a time interval from the specified time after the synchronization bit to generate data bit information; wherein the specified number of times is determined by the number of data bits; acquiring a first voltage amplitude value which is a high level and a second voltage amplitude value which is a low level, wherein the first voltage amplitude value is larger than the second voltage amplitude value;
and determining the illumination control command by the data bit information.
By adopting the above technical solution, the method can cooperate with the method as provided in the first aspect to achieve the acquisition of the lighting control command in the voltage sequence to achieve the control of the lighting terminal.
In a third aspect, the present application provides a lighting power supply box. This power supply box includes:
the information acquisition module is used for acquiring frequency influence information and amplitude influence information of the power supply circuit;
the information determining module is used for determining signal frequency information according to the frequency influence information and determining signal amplitude information according to the amplitude influence information;
the information conversion module is used for converting the illumination control command into a voltage sequence with variable amplitude when receiving the illumination control command, wherein a first voltage amplitude in the voltage sequence corresponds to a high level, and a second voltage amplitude corresponds to a low level; the first voltage amplitude is greater than the second voltage amplitude, and the difference between the first voltage amplitude and the second voltage amplitude is determined by signal amplitude information; the voltage sequence is used for outputting to the power supply line;
the voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits which are sequentially arranged; the start bit and the synchronous bit are identified by instantaneous signals, the time interval between the start bit and the synchronous bit is used for identifying the period duration of the voltage sequence, and the duration of each data bit is the period duration; the cycle duration is determined by the signal frequency information.
In a fourth aspect, the present application provides a lighting terminal. The terminal includes:
the period determining module is used for determining the period duration according to the instantaneous signals of the start bit and the synchronization bit which are acquired in sequence;
the data determining module is used for acquiring the voltage amplitude designated times of the power supply circuit by taking the period duration as a time interval from the designated time after the synchronization bit to generate data bit information; wherein the specified number of times is determined by the number of data bits; acquiring a first voltage amplitude value which is a high level and a second voltage amplitude value which is a low level, wherein the first voltage amplitude value is larger than the second voltage amplitude value;
and the command determination module is used for determining the illumination control command according to the data bit information.
In a fifth aspect, the present application provides a lighting control system based on power supply lines. The system comprises a power supply box as described in the third aspect above and a terminal as described in the fourth aspect above.
To sum up, the application comprises the following beneficial technical effects:
the method, the power box, the terminal and the system can reasonably determine the period and the amplitude of the voltage sequence based on the related information of the interference of the power supply line to the voltage sequence, not only can enable the voltage sequence to be clearer under the condition of the interference and be identified more accurately, but also are beneficial to reducing the influence of the voltage sequence on the stability of the voltage amplitude in the power supply line, improving the transmission speed of the voltage sequence and reducing the transmission cost of the voltage sequence.
Drawings
FIG. 1 illustrates a schematic diagram of an exemplary operating environment in which embodiments of the present application can be implemented.
Fig. 2 shows a flowchart of a lighting control method applied to a power box in the embodiment of the present application.
Fig. 3 shows a flowchart of a lighting control method applied to a lighting terminal in the embodiment of the present application.
Fig. 4 shows a block diagram of a power supply box in an embodiment of the present application.
Fig. 5 shows a block diagram of a lighting terminal in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Embodiments of the present application are specifically disclosed below with reference to fig. 1 to 5.
The lighting terminal is mainly powered and controlled in a centralized power supply and control mode.
As for the related art of controlling the lighting terminal by dc centralized power supply, reference may be made to a control method disclosed in CN103763833B for controlling the LED street lamp based on the power supply line. In the method, a power supply box is adopted to obtain an illumination control command, the power supply box converts the illumination control command into a voltage sequence, the voltage sequence comprises a start bit, n data bits, a check bit and a stop bit, and the duration of each bit of data is a determined period duration. One voltage sequence is different voltage amplitude values in the power supply line, and the street lamp unit obtains the illumination control command by analyzing the voltage sequence in the power supply line so as to control the street lamp, such as brightness adjustment, opening and closing.
The power supply line has a plurality of factors influencing the waveform of the voltage sequence, such as the load of the power supply line, the line resistance of the power supply line and the capacitive reactance of the power supply line, the power supply line with light load, small line resistance and low capacitive reactance has small influence on the waveform of the voltage sequence, and the slope of level change in the waveform of the voltage sequence is larger, so that the voltage sequence can be accurately identified even if the frequency of the voltage sequence is larger, the frequency of the voltage sequence is increased at the moment, namely the period duration is reduced, the total duration of the voltage sequence is favorably reduced, the transmission speed of the voltage sequence is improved, and the transmission speed of the illumination control command is improved. On the basis that the frequency of the voltage sequence is properly reduced and the period duration is properly increased due to the increase of loads carried by the power supply line, the increase of line loads of the power supply line or the increase of capacitive reactance of the power supply line, so that the voltage sequence can be accurately identified under the interference of the power supply line, the total duration of the voltage sequence is also favorably reduced, the transmission speed of the voltage sequence is improved, and the transmission speed of the lighting control command is improved.
For another example, electrical devices in a radiation environment of a power supply line may affect the amplitude of the voltage in the power supply line, and accordingly, the amplitude of the voltage sequence. If the interference of the electric equipment in the radiation environment of the power supply line is small, the influence of the electric equipment on the amplitude of the voltage sequence is correspondingly small, under the condition, the amplitude difference between the high level and the low level in the voltage sequence is small, the high level and the low level can be accurately identified in the power supply line, the amplitude of the high level and the low level in the voltage sequence is reduced, the fluctuation of the power supply voltage in the power supply line is favorably reduced, and the street lamp is supplied with power more stably. When the interference of the electric equipment in the radiation environment of the power supply line is increased, the amplitude between the high level and the low level in the voltage sequence is properly increased, so that the fluctuation of the power supply voltage in the power supply line is reduced on the basis that the high level and the low level in the voltage sequence can be accurately identified under the interference, and the stable power supply for the street lamp is facilitated.
In summary, the frequency and amplitude of the voltage sequence are reasonably determined according to the influence of the power supply line on the waveform of the voltage sequence, so that the voltage sequence can still be accurately identified under the influence of the power supply line or the radiation environment of the power supply line, the illumination control command can be more accurately transmitted to each illumination terminal, the transmission speed of the illumination control command is increased, the transmission efficiency of the illumination control command is increased, the stability of the power supply voltage in the power supply line is increased, and more stable power supply to the illumination terminals is facilitated.
The embodiment of the application provides a lighting control method, a power supply box, a lighting terminal and a system based on a power supply line, and the method, the power supply box, the terminal and the system can reasonably determine the frequency and amplitude of a voltage sequence formed according to a lighting control command, so that the transmission efficiency of the lighting control command is improved on the basis of keeping the lighting control command accurately transmitted to each lighting terminal, and the lighting terminal is more stably powered.
FIG. 1 illustrates a schematic diagram of an exemplary operating environment 100 in which embodiments of the present application can be implemented.
Referring to fig. 1, the operating environment 100 includes a power supply box 110, an illumination terminal 120, and a power supply line 130, where, also taking a road illumination scene as an example, the power supply line 130 is connected to the power supply box 110 and the illumination terminal 120, the power supply box 110 is used to supply power to a section of the illumination terminal 120, and the illumination terminal 120 is a street lamp terminal, which includes a street lamp and a street lamp controller, and the street lamp controller can collect a voltage amplitude in the power supply line 130 and is used to control actions such as turning on, turning off, and adjusting brightness of the street lamp.
Other conventional technologies in the lighting terminal 120, such as the specific principle that the power module takes power from the power supply line 130 to power the street lamp, and the lighting terminal 120 collects the voltage amplitude on the power supply line 130, are not specifically described nor shown in the drawing.
Fig. 2 shows a flowchart of a lighting control method 200 applied to the power box 110 in fig. 1 in the embodiment of the present application.
Referring to fig. 2, the method 200 includes the steps of:
s210: and acquiring frequency influence information and amplitude influence information of the power supply line.
The frequency influence information is information that affects the frequency of the voltage sequence, and may also be referred to as cycle influence information. The frequency influence information includes information on the magnitude of the load carried by the power supply line 130, information on the line resistance of the power supply line 130, and information on the line capacitive reactance.
The amplitude influence information is generated device interference information of the electric devices in the environment radiated by the power supply line 130.
The load size information, the line resistance information, the line capacitive reactance information, and the device interference information are all for the entire power supply line 130. The load size information is determined by the size of the load carried by the power supply line, the line resistance information is determined by the length, material and cross-sectional area of the power supply line 130, and the line capacitive reactance information is determined by the capacitance between the wires of the power supply line 130.
The load size information, the line resistance information, the line capacitive reactance information, and the equipment interference information may be calculated by the operator according to the load parameters, the line model and the length of the power supply line 130, and the capacitance between the wires of the power supply line 130, or may be obtained by the data acquisition system acquiring the load parameters, the line model and the length of the power supply line 130, and the capacitance between the wires of the power supply line 130, and then obtained based on a function constructed by the skilled person according to experience and related knowledge.
Under the condition that load size information, line resistance information, line capacitive reactance information and equipment interference information are all known, a worker can calculate and determine frequency influence information and amplitude influence information based on the information and relevant knowledge and experience, the worker can also construct a function based on the relevant knowledge and experience, and the frequency influence information and the amplitude influence information are automatically obtained by inputting the load size information, the line resistance information, the line capacitive reactance information and the equipment interference information.
The obtained frequency influence information is determined to be an upper frequency threshold, and if the frequency of the voltage sequence is higher than the upper frequency threshold, the frequency influence information is difficult to be identified in the power supply line 130. The obtained amplitude influence information is determined to be a very large amplitude difference, which represents the very large amplitude difference of the voltage amplitude fluctuation of the voltage amplitude in the power supply line 130 under the amplitude influence information.
After the frequency influence information and the amplitude influence information are determined, the frequency influence information and the amplitude influence information are input into the power box 110 by a worker or sent to the power box 110 by front-end equipment or a system, namely, the power box 110 acquires the frequency influence information and the amplitude influence information.
S220: signal frequency information is determined from the frequency impact information, and signal amplitude information is determined from the amplitude impact information.
When both the frequency influence information and the amplitude influence information are acquired by the power box 110, the power box 110 may determine a signal frequency information and a signal amplitude information according to the frequency threshold upper limit in the frequency influence information and the maximum amplitude difference in the amplitude influence information.
The signal frequency information includes a designated frequency, and the designated frequency may be selected within a frequency range having a frequency smaller than the upper limit of the frequency threshold, and specifically may be selected within a range from 0.6 times to 0.95 times of the upper limit of the frequency range, for example, a frequency corresponding to the upper limit of the frequency range of 0.9 times is selected, and the designated frequency corresponds to a designated period duration.
The signal amplitude information is determined by the power supply line 130 from the amplitude difference, which includes a specified amplitude difference, which may be selected within an amplitude difference range larger than the maximum amplitude difference, and specifically may be selected within a range between 1.05 times and 2 times of the maximum amplitude difference, for example, 1.5 times of the maximum amplitude difference.
When the signal amplitude information is determined, the power supply box 110 can determine a first voltage amplitude for indicating a high level and a second voltage amplitude for indicating a low level based on a preset power supply voltage output when the lighting control command is not included, the first voltage amplitude being greater than the second voltage amplitude, and an amplitude difference between the first voltage amplitude and the second voltage amplitude being equal to a specified amplitude difference. Specifically, the first voltage amplitude may be selected as a preset power supply voltage, and the second voltage amplitude may be a voltage amplitude obtained by subtracting a specified amplitude difference from the preset power supply voltage.
Based on the signal frequency information, the power supply box 110 can determine the frequency and the period of the voltage sequence, and specifically, the specified frequency and the specified period duration can be directly determined as the frequency and the period of the voltage sequence.
S230: upon receiving the lighting control command, the lighting control command is converted into a voltage sequence of varying amplitude.
After receiving the lighting control command, the power box 110 converts the lighting control command into a voltage control command based on a corresponding communication protocol, and controls the voltage amplitude output from the power box 110 to the power supply line 130 under the voltage control command to form a voltage sequence.
The voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits, wherein the start bit and the synchronization bit are both identified by instantaneous signals, the time between the start bit and the synchronization bit is the specified period duration, and the data bits are identified by high level or low level lasting the specified period duration.
In one example, the voltage sequence includes a start bit, a sync bit, and eight data bits arranged in sequence. The start bit is a falling edge signal, the sync bit is a rising edge signal, and the data bit is a high level signal or a low level signal lasting for one of the specified periods. The time interval in which the start bit and the sync bit occur is used to identify the specified period duration, and the data bits are used to carry the illumination control commands.
Specifically, upon receiving a specified lighting control command, the power supply box 110 first binary-encodes, forming eight-bit binary data, based on the lighting control command. The power supply voltage output from the power supply box 110 to the power supply line 130 is a first voltage amplitude in a normal state, the power supply box changes the power supply voltage output to the power supply line 130 into a second voltage amplitude at a first moment, and continuously outputs the second voltage amplitude for a specified period duration, the second moment is a specified period from the first moment, and the power supply box 110 starts to output the first voltage amplitude to the power supply line 130 at a second moment. The first voltage amplitude then lasts for a period of one cycle to a third time. At the third moment, the power box 110 starts to output the first voltage amplitude or the second voltage amplitude which sequentially lasts for a specified period duration, which is determined by eight-bit binary data formed according to the illumination control command, wherein the first voltage amplitude is at a high level, the second voltage amplitude is at a low level, and the first voltage amplitude and the second voltage amplitude of the data bit are arranged to form data arranged at the high level and the low level to form eight-bit secondary data.
In order to reduce the influence of the voltage amplitude variation in the power supply line 130 on the stability of the power supply to the lighting terminal 120, a smoothing process is generally performed on the high level and the low level variation of the voltage sequence, that is, no matter the high level is changed to the low level or the low level is changed to the high level, the power supply box 110 is controlled to be operated for a preset time length, so that the high level and the low level are represented as a ramp signal, and the time of the midpoint of the ramp signal is determined as the time of the level variation.
The voltage sequence may further include a check bit and a stop bit, and the check bit and the stop bit may be identified by an instant signal, or may be identified by a high level or a low level lasting for a specified period duration, which is not particularly limited.
According to the method 200, when obtaining the lighting control command, the power box 110 can output a voltage sequence carrying the lighting control command to the power supply line 130, and the cycle duration of the voltage sequence and the amplitude difference between the power supply voltages indicating the high level and the low level are both reasonably determined by the interference of the power supply line 130 and the radiation environment, so that the lighting control command carried by the voltage sequence can be accurately transmitted, the transmission efficiency of the voltage sequence and the lighting control command can be improved, the influence of the carried lighting control command on the stability of the power supply voltage can be reduced, and the street lamp action in the lighting terminal 120 can be efficiently and stably controlled.
Fig. 3 shows a flowchart of a lighting control method 300 applied to the lighting terminal 120 in the embodiment of the present application.
Referring to fig. 3, the method 300 includes the steps of:
s310: and determining the period duration according to the instantaneous signals of the start bit and the synchronization bit which are acquired in sequence.
The lighting terminal 120 can obtain the magnitude of the voltage that the power supply line 130 outputs to the lighting terminal 120 to power the lighting terminal 120.
The amplitude of the voltage received by the lighting terminal 120 from the power supply line 130 in a normal state is a preset amplitude of the voltage of the power supply voltage which fluctuates after the power supply voltage is lost through the line and the load. The disturbance on the power supply line 130 may cause the lighting terminal 120 to acquire the voltage amplitude variation from the power supply line 130, but the variation does not exceed the extremely large amplitude difference and does not reach the specified amplitude difference, and based on this, the lighting terminal 120 may determine whether the voltage sequence is included in the acquired voltage amplitude of the power supply line 130. That is, the lighting terminal 120 may determine the voltage sequence contained in the power supply line 130 when the voltage amplitude on the power supply line 130 varies beyond a preset variation.
As an example corresponding to the first aspect example, if the voltage amplitude on the power supply line 130 in a normal state is a high level, when the voltage amplitude on the power supply line 130 decreases beyond a very large amplitude difference and reaches a specified amplitude difference, it is determined that the power box outputs a low level.
In conjunction with the above, the voltage sequence carrying the illumination control command output by the power box 110 includes a start bit, a synchronization bit, a space bit and eight data bits.
Therefore, the lighting terminal 120 is determined to start receiving the voltage sequence only when the lighting terminal 120 receives a falling edge signal and a rising edge signal, and the lighting terminal 120 determines the specified period duration according to the time interval of the start bit and the synchronization bit.
Of course, the process of acquiring the rising edge signal and the falling edge signal by the lighting terminal 120 is also a process of continuing for a preset time length, and the middle time of the acquired falling edge signal may be determined as the time of the falling edge signal, that is, the occurrence time of the start bit, and the middle time of the acquired rising edge signal may be determined as the time of the rising edge signal, that is, the occurrence time of the synchronization bit.
That is, if the time when the start bit occurs is T1 and the time when the sync bit occurs is T2, the specified period duration is T2-T1.
S320: and acquiring the voltage amplitude specified times of the power supply circuit by taking the period duration as a time interval from the specified time after the synchronization bit to generate data bit information.
The designated time provided by the method in this step is the middle time within the duration of the first data bit. In an example given in connection with the first aspect, the voltage sequence includes a start bit, a sync bit, a space bit, and eight data bits, the time between the start bit and the sync bit is a specified period duration, and the duration of the space bit and each of the data bits is a specified period duration.
When the time when the start bit occurs is T1, the time when the sync bit occurs is T2, and the specified cycle duration is T2 to T1, the specified time is T3= T2+ (T2 to T1)/2.
A designated number of times is preset in the illumination terminal 120, where the designated number of times is the same as the number of data bits of the voltage sequence, that is, the illumination terminal 120 acquires the voltage amplitude of the power supply line 130 once every designated period duration starting at a designated time to determine whether the voltage amplitude is at a high level or a low level, and continues for the designated number of times to obtain binary data of the data bits, where the designated number of times is eight, and the times to acquire the voltage amplitude are T2+3 (T2-T1)/2, T2+5 (T2-T1)/2, T2+7 (T2-T1)/2, T2+9 (T2-T1)/2, T2+11 (T2-T1)/2, T2+13 (T2-T1)/2, T2+15 (T2-T1)/2, T2+17 (T2-T1)/2, respectively; the resulting data is eight-bit binary data. The specified bit binary data obtained by collecting the voltage amplitude for the specified times by the lighting terminal 120 is data bit information.
S330: the illumination control command is determined by the data bit information.
The lighting terminal 120 decodes the binary data bit information into a lighting control command through a communication protocol, and may perform control, such as turning on, turning off, dimming, or the like, corresponding to the lighting control command on the street lamp, which is a conventional method and is not specifically disclosed.
The method 300 is the inverse process of the method 200, so the specific method steps in the method 300 can be changed into corresponding method steps according to the equivalent change of the method 200, and other examples of the method 300 are not described in a list.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required in this application.
The above is a description of method embodiments, and the embodiments of the present application are further described below by way of apparatus embodiments.
Fig. 4 illustrates a block diagram of a power supply box 110 formed in accordance with the method 200 in an embodiment of the present application.
Referring to fig. 4, the power supply box 110 includes:
an information obtaining module 410, configured to obtain frequency influence information and amplitude influence information of a power supply line;
an information determining module 420, configured to determine signal frequency information according to the frequency influence information, and determine signal amplitude information according to the amplitude influence information;
the information conversion module 430 is configured to, when receiving the lighting control command, convert the lighting control command into a voltage sequence with a variable amplitude, where a first voltage amplitude in the voltage sequence corresponds to a high level and a second voltage amplitude corresponds to a low level; the first voltage amplitude is greater than the second voltage amplitude, and the difference between the first voltage amplitude and the second voltage amplitude is determined by the signal amplitude information; the voltage sequence is used for outputting to a power supply line;
the voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits which are arranged in sequence; the start bit and the synchronous bit are identified by instantaneous signals, the time interval between the start bit and the synchronous bit is used for identifying the period duration of the voltage sequence, and the duration of each data bit is the period duration; the cycle duration is determined by the signal frequency information.
Fig. 5 illustrates a block diagram of a lighting terminal 120 formed in accordance with the method 300 in an embodiment of the present application.
Referring to fig. 5, the lighting terminal 120 includes:
a period determining module 510, configured to determine a period duration according to the sequentially obtained instantaneous signals of the start bit and the synchronization bit;
a data determining module 520, configured to collect, at a specified time after the synchronization bit, the specified number of times of the voltage amplitude of the power supply line at a time interval of the cycle duration to generate data bit information; wherein the specified number of times is determined by the number of data bits; acquiring a first voltage amplitude value which is a high level and a second voltage amplitude value which is a low level, wherein the first voltage amplitude value is larger than the second voltage amplitude value;
a command determination module 530 for determining the illumination control command with the data bit information.
Other necessary components such as a street lamp, a power supply module, etc. in the lighting terminal 120 are not described.
Additionally, the power supply box 110 formed in accordance with the method 200 and the lighting terminal 120 formed in accordance with the method 300 may cooperate to form a lighting control system.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described module may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. A power-line-based lighting control method applied to a power supply box (110) for supplying power to a power supply line (130), comprising:
acquiring frequency influence information and amplitude influence information of a power supply line (130);
determining signal frequency information according to the frequency influence information, and determining signal amplitude information according to the amplitude influence information;
when an illumination control command is received, converting the illumination control command into a voltage sequence with variable amplitude, wherein a first voltage amplitude in the voltage sequence corresponds to a high level, and a second voltage amplitude corresponds to a low level; the first voltage amplitude is greater than the second voltage amplitude, and the difference between the first voltage amplitude and the second voltage amplitude is determined by signal amplitude information; the voltage sequence is for output to the power supply line (130);
the voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits which are sequentially arranged; the start bit and the synchronous bit are identified by instantaneous signals, the time interval between the start bit and the synchronous bit is used for identifying the period duration of the voltage sequence, and the duration of each data bit is the period duration; the cycle duration is determined by the signal frequency information.
2. The power-supply-line-based lighting control method according to claim 1, wherein the frequency influence information includes load size information, line resistance value information, and line capacitive reactance information.
3. The power-supply-line-based lighting control method according to claim 1, wherein the magnitude-influence information includes device interference information.
4. The power-supply-line-based lighting control method according to claim 1, wherein the start bit is a falling edge signal and the synchronization bit is a rising edge signal.
5. The power-supply-line-based lighting control method according to claim 1, wherein there is a space bit between the synchronization bit and the first data bit for one of the cycle durations.
6. A lighting control method based on a power supply line is applied to a lighting terminal (120), and is characterized by comprising the following steps:
determining the period duration according to the instantaneous signals of the start bit and the synchronization bit which are acquired in sequence;
acquiring the specified times of the voltage amplitude of the power supply line (130) by taking the period duration as a time interval from the specified time after the synchronization bit to generate data bit information; wherein the specified number of times is determined by the number of data bits; acquiring a first voltage amplitude value which is a high level and a second voltage amplitude value which is a low level, wherein the first voltage amplitude value is larger than the second voltage amplitude value;
and determining the illumination control command by the data bit information.
7. An illumination power supply box, comprising:
the information acquisition module (410) is used for acquiring frequency influence information and amplitude influence information of the power supply line (130);
an information determining module (420) for determining signal frequency information from the frequency impact information and for determining signal amplitude information from the amplitude impact information;
the information conversion module (430) is used for converting the illumination control command into a voltage sequence with variable amplitude when the illumination control command is received, wherein a first voltage amplitude in the voltage sequence corresponds to a high level, and a second voltage amplitude corresponds to a low level; the first voltage amplitude is greater than the second voltage amplitude, and the difference between the first voltage amplitude and the second voltage amplitude is determined by signal amplitude information; the voltage sequence is for output to the power supply line (130);
the voltage sequence comprises a start bit, a synchronization bit and a plurality of data bits which are sequentially arranged; the start bit and the synchronous bit are identified by instantaneous signals, the time interval between the start bit and the synchronous bit is used for identifying the period duration of the voltage sequence, and the duration of each data bit is the period duration; the cycle duration is determined by the signal frequency information.
8. A lighting terminal, comprising:
the period determining module (510) is used for determining the period duration according to the instantaneous signals of the start bit and the synchronization bit which are acquired in sequence;
the data determination module (520) is used for acquiring the voltage amplitude designated times of the power supply line (130) by taking the period duration as a time interval from the designated time after the synchronization bit to generate data bit information; wherein the specified number of times is determined by the number of data bits; acquiring a first voltage amplitude value which is a high level and a second voltage amplitude value which is a low level, wherein the first voltage amplitude value is larger than the second voltage amplitude value;
a command determination module (530) for determining an illumination control command with the data bit information.
9. A lighting control system comprising the power supply box of claim 7 and the lighting terminal of claim 8.
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