CN103763833B - A kind of control method and system controlling LED street lamp based on supply line - Google Patents
A kind of control method and system controlling LED street lamp based on supply line Download PDFInfo
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- CN103763833B CN103763833B CN201410032298.4A CN201410032298A CN103763833B CN 103763833 B CN103763833 B CN 103763833B CN 201410032298 A CN201410032298 A CN 201410032298A CN 103763833 B CN103763833 B CN 103763833B
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Abstract
The invention provides a kind of control method and the system that control LED street lamp based on supply line.This control method comprises: Street lamps control order is converted to the contact potential series of coupling by power supply box; Streetlight unit resolves this contact potential series, to obtain the control command entrained by described contact potential series; And control the electric current of street lamp based on this control command, thus control the brightness of street lamp.Relative to prior art, the present invention obtains the contact potential series of coupling by the mode changing supply power voltage amplitude, this contact potential series adopts different magnitudes of voltage as high level and low level, effectively can overcome in circuit and there is high and low frequency interference problem, and supply power voltage declines on the impact of LED street lamp brightness gradually when solving long transmission line transmission, reliability is high, and cost is extremely low.
Description
Technical field
The present invention relates to the Street lamps control field of direct current central power supply system, particularly relate to a kind of control method and the system that control LED street lamp based on supply line.
Background technology
For the control system of direct current centrally connected power supply, power supply box controls one whole section of street lamp, and to turn on light, turn off the light and carry out brightness regulation be a kind of basic demand.
In street lamp application, a power supply box (or DC converter) needs to the street lamp power supply, road lamp power supply of hundreds of on stretch, circuit is about a few km, due to the existence of line loss, from first street lamp near DC converter to a street lamp farthest, supply power voltage can decline gradually, and distalmost end is lower than most proximal end tens volts.This problem can have influence on stability and the dimming function of street lamp work.
Direct current supply line exists High-frequency Interference and low-frequency disturbance simultaneously, and High-frequency Interference is mainly from lamp stand power supply driver, and its frequency is consistent with the switching frequency of lamp stand power supply driver; Low-frequency disturbance mainly a large amount of lamp stand power supply drivers light modulation simultaneously work time the current disturbing that produces in supply line and supply line on inductance interact and produce, its frequency is at about 0.1Hz, and interference voltage amplitude of variation can reach about 15V.
Current industry addresses these problems and mainly contains following several scheme:
Scheme one:
A section uses a power supply box to power, and use the mode of ZigBee communication module (as shown in Figure 1) or other proprietary communication lines to carry out communication between power supply box and each streetlight unit, concrete control procedure is as follows:
Send control command in power supply box each streetlight unit, send each streetlight unit to by ZigBee communication module or other proprietary communication lines, in street lamp, resolution unit performs corresponding operating based on control command.There is following shortcoming in the method: 1, each streetlight unit all needs the communication module installing ZigBee communication module or other proprietary communication lines, and cost is high.2, the transmitting power due to ZigBee communication module is little, communication distance is short, so transmission of signal need be carried out by means of adjacent ZigBee communication module when running into barrier and blocking and communication distance need be exceeded, so, when there being part ZigBee communication module fault, may because of cannot transmission of signal and cause follow-up street lamp out of hand, poor reliability.3, the communication of ZigBee communication module is comparatively vulnerable to interference, poor stability.4, some communication module (as DALI) also needs to lay special communication circuit, and the complicated difficulty of engineering construction, cost is high.
Scheme two:
A section uses a power supply box to power, and use power carrier (PLC) communication module (as shown in Figure 2) to carry out communication between power supply box and each streetlight unit, concrete control procedure is as follows:
Send control command in power supply box each streetlight unit, send each streetlight unit to by power carrier (PLC) communication module, in street lamp, resolution unit performs corresponding operating based on control command.The method advantage utilizes supply line's communication, do not need to lay special communication line; But there is following shortcoming: 1, in the system of direct current supply, owing to circuit existing electric capacity and inductance, make the signal attenuation of transmission very serious, in engineering, practical effect is bad, poor reliability.2, power supply box and each streetlight unit need to install power carrier (PLC) communication module, and cost is high.
Scheme three:
Chinese invention " device of a kind of LED street lamp energy conversion and Energy Saving Control ", application number: 201010124833.0, disclose a kind of electric power side direct current changeable device and the AC AC power of electric power side is converted to transformable direct voltage, this direct voltage through cable transmission to the LED constant current converter of far-end, the alterable direct current energy that transmission comes is converted to the DC constant current power supply required for LED street lamp by LED constant current converter, thus realizes the method for LED street lamp control.The method utilizes to regulate the method for DC converter output voltage to control LED street lamp.There is following shortcoming in the method: 1, in street lamp application, a DC converter needs to the street lamp power supply, road lamp power supply of hundreds of on stretch, circuit is about a few km, due to the existence of line loss, from first street lamp near DC converter to a street lamp farthest, supply power voltage can differ tens volts, street lamp carrys out regulation output electric current by respective input voltage, street lamp brightness on one Zheng Duan road can be different, from DC converter more away from, brightness can be darker.Time serious, there will be some street lamp bright, the situation that some street lamp does not work.It is unreliable to control.2, in order to tackle the problem that voltage in supply line declines gradually, the program proposes the control signal using voltage between 100V-400V as light modulation, and road lamp power supply driver must adapt to very wide input voltage range, causes the electronic device cost increase selected.
Scheme four:
Chinese invention " high direct voltage power LED street lamp system and control signal transmission method of reseptance ", application number: 201110277122.1, disclose a kind of high direct voltage power LED street lamp system and control signal transmission method of reseptance, wherein system comprises the LED street lamp that central DC power supply rack and electric wire thereof connect, and method comprises: central DC power supply rack by electric wire with the first high voltage supply; Central authorities' DC power supply rack continues duration by electric wire with the second high pressure and first and powers and transmit data " 1 "; Central authorities' DC power supply rack continues duration by electric wire with the second high pressure and second and powers and transmit data " 0 ".There is following shortcoming in the method: 1, its method is by judging that change in voltage rising edge and trailing edge identify digital information, when there is High-frequency Interference and low-frequency disturbance at the same time, its method can not the rising edge of reliable recognition change in voltage and trailing edge, namely can not identify digital information reliably; What 2, its method identified transmission with the duration of the second voltage is data " 1 " or " 0 ", and between each data, also need first voltage of certain duration of increase.The time of signal transmission is longer.The method transmits data " 0 " needs 3.8 seconds, and transmitting data " 1 " needs 4.8 seconds (as shown in Figure 3).3, the mechanism such as not verify during signal transmission, there is the situation of interference in supply line under, poor reliability.4, it uses fixed voltage as the first high pressure and the second high pressure, but owing to there is line loss in engineering, the supply power voltage of each streetlight unit is different, so be difficult to realize each streetlight unit correctly can receive order.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of control method and the system that control LED street lamp based on supply line.
For achieving the above object and other relevant objects, the invention provides a kind of control method controlling LED street lamp based on supply line, it at least comprises:
Street lamps control order is converted to the contact potential series of coupling by power supply box;
Streetlight unit resolves this contact potential series, to obtain the control command entrained by contact potential series; And
Control the electric current of street lamp based on this control command, thus control the brightness of street lamp.
Preferably, above-mentioned step Street lamps control order being converted to the contact potential series of coupling also comprises: Street lamps control order is converted to corresponding voltage control order based on predefined communication protocol by power supply box; And described voltage control order is converted to the contact potential series of coupling.
More preferably, the contact potential series of described coupling is the contact potential series of amplitude change, wherein, the first voltage magnitude in contact potential series corresponds to high level, second voltage magnitude corresponds to low level, this first voltage magnitude is greater than the second voltage magnitude, and this first voltage magnitude and this second voltage magnitude change with the change of supply power voltage.
More preferably, this contact potential series comprises start bit, multiple data bit, position of rest and check digit, and wherein, each corresponds to this high level or this low level, and the time span of each is a fixed value.
Preferably, described power supply box obtains the contact potential series of coupling by the mode changing supply power voltage amplitude.
The present invention also provides a kind of control system controlling LED street lamp based on supply line, it at least comprises: power supply box, there is monitoring unit and voltage transformation module, wherein, Street lamps control order is converted to corresponding voltage control order based on predefined communication protocol by this monitoring unit, and this voltage transformation module is used for the contact potential series this voltage control order being converted to coupling; And
Multiple streetlight unit, is powered by this power supply box; Each streetlight unit comprises street lamp and resolution unit, described resolution unit resolves the contact potential series from voltage transformation module based on predefined communication protocol, to obtain the control command entrained by contact potential series, and control the electric current of street lamp based on this control command, thus control the brightness of street lamp.
Preferably, described monitoring unit builds based on microprocessor, man-machine interaction unit, display unit and communication unit.
Preferably, described voltage conversion unit comprises the unit exchanging and be converted to direct current.
Preferably, described resolution unit comprises power conversion unit, and this power conversion unit is DC/DC converter, and the direct voltage for being provided by power supply box is converted to the voltage needed for street lamp, to realize the function of illumination and light modulation.
As mentioned above, control method and the system controlling LED street lamp based on supply line of the present invention, there is following beneficial effect: effectively overcome in circuit and there is high and low frequency interference problem, solve supply power voltage when long transmission line transmits to decline gradually on the impact of LED street lamp brightness, reliability is high; Cost is low, has good economic benefit, and in addition, material consumption is few, has the value of environmental protection.
Accompanying drawing explanation
Fig. 1 is shown as between power supply box of the prior art and streetlight unit and adopts ZigBee to carry out the road lamp system schematic diagram of communication.
Fig. 2 is shown as between power supply box of the prior art and streetlight unit and adopts power carrier to carry out the road lamp system schematic diagram of communication.
Fig. 3 is shown as Chinese invention in prior art " high direct voltage power LED street lamp system and control signal transmission method of reseptance thereof " and transmits the time diagram of data " 0 " and data " 1 ".
Fig. 4 is shown as the flow chart controlling the control method of LED street lamp based on supply line of the present invention.
Fig. 5 a is shown as voltage transformation module in power supply box of the present invention and sends to the signal schematic representation of streetlight unit.
Fig. 5 b is shown as the digital signal schematic diagram from supply line that streetlight unit of the present invention is resolved.
Fig. 6 is shown as the control system schematic diagram controlling LED street lamp based on supply line.
Element numbers explanation
1 control system
12 power supply boxs
121 monitoring units
122 voltage transformation modules
13 streetlight units
131 street lamps
132 resolution unit
S1 ~ S3 step
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present invention and effect easily.
Refer to Fig. 4 to Fig. 6.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 4, the invention provides a kind of control method controlling LED street lamp based on supply line.Wherein, method according to the present invention has been come mainly through control system, and this control system comprises and is arranged in power supply box and streetlight unit and can realizes such as application module, the processing controller etc. of the present invention program.
In step sl, Street lamps control order is converted to the contact potential series of coupling by power supply box.
Wherein, described Street lamps control order comprises any order for controlling street lamp, preferably, includes but not limited to: turn on light, turn off the light, the order such as light modulation.
Particularly, Street lamps control order is first converted to corresponding voltage control order based on predefined communication protocol by power supply box; Again described voltage control order is converted to the contact potential series of coupling subsequently.
Wherein, described predefined communication protocol is the communication protocol between power supply box and streetlight unit, preferably, include but not limited to: when streetlight unit at a time determines that the supply power voltage that self is obtained by power supply box there occurs change, then determining that the voltage signal obtained after this moment is considered as is the voltage signal carrying control command.
Wherein, the contact potential series of described coupling is the contact potential series of amplitude change, wherein, in contact potential series, high level and low level coding adopt relative level mode, namely high level and low level are not fixed voltage values, follow supply power voltage change, as long as the voltage difference between the high level transmitted and low level is greater than a fixed value, streetlight unit then in control system just can parse high level and low level signal, thus identifies the communication command that supply line carries.Contact potential series not only comprises data bit, also with start bit, position of rest, the check digit of signal, each transmission is all that timing is long.
Such as, if power supply box receives the control command of the street lamp adjustment brightness of remote port, then this control command is first converted to voltage control order by power supply box, subsequently again according to this voltage control order, the combination voltage sequence VA of output matching, wherein, this combination voltage sequence VA is at least the free time of T0 by: duration, and the duration is 1 start bit (high level) of T, n-bit data position, 1 bit check position, 1 position of rest (low level).High level and low level magnitude of voltage are not fixed, and are correlated with supply power voltage.If supply power voltage is V0, then the high level voltage that voltage conversion unit exports is V0+ △ V1, and low level voltage is V0, and when sending signal, each duration is fixed as T (only 0.8 second).As shown in Figure 5 a, in figure, low level voltage is V0 to the output voltage sequence regulating the order of brightness concrete, and high level voltage is V0+ △ V1, B is start bit, and P is check digit, and S is position of rest, and centre is n-bit data position.
It should be noted that, described abovely only just to list, but not limitation of the present invention, in fact, voltage control order also can be converted to the voltage signal etc. of amplitude change by power supply box based on other communication protocols.
Then, in step s 2, streetlight unit resolves this contact potential series, to obtain the control command entrained by contact potential series.
Particularly, streetlight unit resolves the contact potential series from power supply box based on predefined communication protocol, to obtain the control command entrained by this contact potential series.Its operation principle is streetlight unit sampled input voltage (i.e. supply power voltage) real-time, within the T0 time, if change in voltage one among a small circle in, then establishing this voltage is the magnitude of voltage that low level is set up, when a certain moment, sample input voltage and become greater to another magnitude of voltage, and differ certain more than difference △ V2 with previous low level voltage value, streetlight unit is thought and is received an initial receiving flag, start by set time Received signal strength by turn, in each set time T, to sample n point, when sampling n/2 and putting above more than the large △ V2 of voltage ratio low level voltage (△ V2< △ V1), then think that this position is high level, otherwise be low level, receive all data bit, after check bit sum position of rest, verify, if signal is effective, then according to this order, street lamp is controlled.
Such as, the streetlight unit of local side based on the combination voltage signal VA of predefined communication protocol A1 parsing from power supply box, then determines that the control command that this combination voltage signal VA carries is the order regulating brightness.Fig. 5 b is the digital signal parsed according to the streetlight unit in supply line, for street lamp regulates the order of brightness.
Then, in step s3, streetlight unit controls the electric current of street lamp based on this control command, thus controls the brightness of street lamp.
Such as, streetlight unit performs the operation of brightness regulation based on street lamp brightness adjusting command.
As shown in Figure 6, the invention provides a kind of control system directly controlling LED street lamp based on supply line.Described control system 1 at least comprises: power supply box 12 and the streetlight unit 13 of being powered by described power supply box 12.
Described power supply box 12 is for powering to each streetlight unit 13, and it at least comprises monitoring unit 121 and voltage transformation module 122.
Street lamps control order is converted to corresponding voltage control order based on predefined communication protocol by described monitoring unit 121.
Wherein, described Street lamps control order comprises any order for controlling street lamp, preferably, includes but not limited to: turn on light, turn off the light, the order such as light modulation.
Wherein, described predefined communication protocol is the communication protocol between power supply box and streetlight unit, preferably, include but not limited to: when streetlight unit at a time determines that the supply power voltage that self is obtained by power supply box there occurs change, then determining that the voltage signal obtained after this moment is considered as is the voltage signal carrying control command.
Preferably, described monitoring unit 121 can build based on microprocessor, man-machine interaction unit, display unit and communication unit etc.
Described voltage conversion unit 122 is for being converted to the contact potential series of coupling by voltage control order.
Wherein, the contact potential series of described coupling is the contact potential series of amplitude change, wherein, in contact potential series, high level and low level coding adopt relative level mode, namely high level and low level are not fixed voltage values, follow supply power voltage change, as long as the voltage difference between the high level transmitted and low level is greater than a fixed value, then streetlight unit just can parse high level and low level signal, thus identifies the control command that supply line carries; Contact potential series not only comprises data bit, also with start bit, position of rest, the check digit of signal, each transmission is all that timing is long.
Such as, if after street lamp regulates the control command of brightness to be converted to voltage control order by power supply box monitoring unit, then voltage conversion unit 122 is according to this voltage control order, the combination voltage sequence VA of output matching, wherein, this combination voltage sequence VA is at least the free time of T0 by: duration, and the duration is 1 start bit (high level) of T, n-bit data position, 1 bit check position, 1 position of rest (low level).High level and low level magnitude of voltage are not fixed, and are correlated with supply power voltage.If supply power voltage is V0, then the high level voltage that voltage conversion unit 122 exports is V0+ △ V1, and low level voltage is V0, and when sending signal, each duration is fixed as T (only 0.8 second).As shown in Figure 5 a, in figure, low level voltage is V0 to the output voltage sequence regulating the order of brightness concrete, and high level voltage is V0+ △ V1, B is start bit, and P is check digit, and S is position of rest, and centre is n-bit data position.
It should be noted that, described abovely only just to list, but not limitation of the present invention, in fact, voltage control order also can be converted to the contact potential series etc. of amplitude change by power supply box based on other communication protocols.
Preferably, described voltage conversion unit 122 comprises the unit exchanging and be converted to direct current.
Described streetlight unit 13 comprises street lamp 131 and resolution unit 132.
Described resolution unit 132, for resolving the contact potential series from power supply box based on predefined communication protocol, to obtain the control command entrained by contact potential series, and controls street lamp based on this control command.
Such as, described resolution unit 132 resolves the combination voltage sequence VB from power supply box 12 based on predefined communication protocol A2, then determine that the control command that this combination voltage sequence VB carries is order of turning off the light, then described resolution unit 132 closes the street lamp self controlled.
Again such as, described resolution unit 132 resolves the combination voltage sequence VA from power supply box 12 based on predefined communication protocol A1, then determine that the control command that this combination voltage sequence VA carries is dimmer command, then described resolution unit 132 adjusts the street lamp brightness self controlled based on predetermined adjustment brightness.
Preferably, described resolution unit 132 builds based on microprocessor, and it comprises power conversion unit.Power conversion unit is DC/DC converter, and the DC power supply being responsible for being provided by power supply box is converted to the power supply needed for street lamp, to realize the function of illumination and light modulation.
Control procedure and the method for controlling street lamps shown in Fig. 4 of above-mentioned control system 1 pair of street lamp are same or similar, and are contained in this by reference, are no longer described in detail at this.
In sum, the communication realizing between power supply box and each streetlight unit based on supply line's scope controlled between minimum voltage that the control method of LED street lamp and system utilize the available ceiling voltage of power supply box and street lamp to work of the present invention; Communication signal is while power supply, also each streetlight unit is sent to via supply line, each streetlight unit, by the change of detecting real-time input voltage amplitude, is resolved the control command in input voltage and is performed, thus realizes turning on light, turns off the light and the control of light modulation; In the solution of the present invention, power supply box and streetlight unit do not need additionally to install communication module or lay proprietary communication line to realize the controlling functions of power supply box to streetlight unit, significantly reduce cost; And, although this scheme make use of the control of supply line's realization to street lamp, but can not cause in system due to different apart from the long-range street lamp brightness caused, and effectively overcome in circuit and there is high and low frequency interference problem, the signal of transmission each be all that timing is long, and with verification scheme, drastically increase the rapidity to street lamp remote control and the reliability communicated.In a word, the present invention not only meets the control overflow of control system, and effectively overcomes in circuit and there is high and low frequency interference problem, and when solving long transmission line transmission, supply power voltage declines gradually on the impact of LED street lamp brightness, and reliability is high.Cost is extremely low in addition, has good economic benefit, and in addition, material consumption is few, has the value of environmental protection.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (6)
1. control a control method for LED street lamp based on supply line, it is characterized in that, described control method at least comprises the following steps:
Street lamps control order is converted to corresponding voltage control order based on predefined communication protocol by power supply box, then voltage control order is converted to the contact potential series of coupling;
Streetlight unit resolves this contact potential series based on predefined communication protocol, to obtain the control command entrained by contact potential series; And control the electric current of street lamp based on this control command, thus control the brightness of street lamp;
The contact potential series of described coupling is the contact potential series of amplitude change, wherein, the first voltage magnitude in contact potential series corresponds to high level, second voltage magnitude corresponds to low level, this first voltage magnitude is greater than the second voltage magnitude, and this first voltage magnitude and this second voltage magnitude change with the change of supply power voltage;
This contact potential series comprises start bit, multiple data bit, position of rest and check digit, and wherein, each corresponds to this high level or this low level, and the time span of each is a fixed value; Voltage difference between described high level and low level is greater than a fixed value.
2. control method according to claim 1, is characterized in that: power supply box obtains the contact potential series of coupling by the mode changing supply power voltage amplitude.
3. one kind controls the control system of LED street lamp based on supply line, it is characterized in that, this control system at least comprises: power supply box, there is monitoring unit and voltage transformation module, wherein, Street lamps control order is converted to corresponding voltage control order based on predefined communication protocol by this monitoring unit, and this voltage transformation module is used for the contact potential series this voltage control order being converted to coupling; And multiple streetlight unit, powered by this power supply box; Each streetlight unit comprises street lamp and resolution unit, described resolution unit resolves the contact potential series from voltage transformation module based on predefined communication protocol, to obtain the control command entrained by contact potential series, and control the output current of street lamp based on this control command, thus control the brightness of street lamp; Wherein, the contact potential series of described coupling is the contact potential series of amplitude change, wherein, the first voltage magnitude in contact potential series corresponds to high level, second voltage magnitude corresponds to low level, this first voltage magnitude is greater than the second voltage magnitude, and this first voltage magnitude and this second voltage magnitude change with the change of supply power voltage; This contact potential series comprises start bit, multiple data bit, position of rest and check digit, and wherein, each corresponds to this high level or this low level, and the time span of each is a fixed value; Voltage difference between described high level and low level is greater than a fixed value.
4. control system according to claim 3, is characterized in that, described monitoring unit builds based on microprocessor, man-machine interaction unit, display unit and communication unit.
5. control system according to claim 3, is characterized in that: described voltage transformation module comprises the unit that interchange is converted to direct current (AC/DC).
6. control system according to claim 3, it is characterized in that: described resolution unit comprises power conversion unit, this power conversion unit is DC/DC converter, and the direct voltage for being provided by power supply box is converted to the voltage needed for street lamp, to realize the function of illumination and light modulation.
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| US10251240B1 (en) | 2017-12-06 | 2019-04-02 | Delta Electronics (Shanghai) Co., Ltd. | DC concentrated illumination system and method for measuring the state of the lamps thereof |
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| CN107027210B (en) * | 2016-02-01 | 2018-10-26 | 华润矽威科技（上海）有限公司 | A kind of LED control circuit and method |
| CN216626106U (en) * | 2019-09-10 | 2022-05-27 | 嘉兴山蒲照明电器有限公司 | LED lamp and dimmer, driving device, lamp holder, dimming panel, power adapter and lighting system thereof |
| WO2021134653A1 (en) * | 2019-12-31 | 2021-07-08 | 宗仁科技(平潭)有限公司 | Identification circuit and method for power-line carrier signal, and integrated circuit chip |
| CN112533334B (en) * | 2020-12-15 | 2023-03-24 | 黄禹舜 | Lighting control method, power box and system based on power supply line |
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