CN113473677B - Control method, device, terminal and driving circuit of plant lighting system - Google Patents

Control method, device, terminal and driving circuit of plant lighting system Download PDF

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Publication number
CN113473677B
CN113473677B CN202110633185.XA CN202110633185A CN113473677B CN 113473677 B CN113473677 B CN 113473677B CN 202110633185 A CN202110633185 A CN 202110633185A CN 113473677 B CN113473677 B CN 113473677B
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value
load branch
led load
current limiting
target
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CN113473677A (en
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葛良安
华桂潮
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Siwei Ecological Technology Hangzhou Co ltd
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Siwei Ecological Technology Hangzhou Co ltd
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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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/14—Measures for saving energy, e.g. in green houses

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The application discloses a control method, a device, a terminal and a driving circuit of a plant lighting system, wherein the method comprises the following steps: obtaining a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch; determining target lamp voltages meeting first preset conditions from all lamp voltages according to preset voltage values of load branches, and determining target LED load branches corresponding to the target lamp voltages; the current limiting value of the target LED load branch is controlled to rise to a first target limiting value according to a preset step length; determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of a current limiting module in the first LED load branch; judging whether the first loss data is lower than a preset loss value or not; if yes, the first LED load branch is controlled to work at the first target current limit value, so that the loss of the lighting system can be reduced, and the efficiency of the lighting system is improved.

Description

Control method, device, terminal and driving circuit of plant lighting system
Technical Field
The application relates to the technical field of multipath LED driving circuits, in particular to a control method, a device, a terminal and a driving circuit of a plant lighting system.
Background
In some illumination occasions, a plurality of LED lamp beads are needed in the lamp, and all the LED lamp beads cannot be connected in series, so that the LED lamp is arranged in a multi-path LED lamp mode. As the indoor illumination needs to have consistent luminous brightness of each path of LEDs in the plurality of paths; therefore, when the circuit is designed, the output voltage of the front-stage constant voltage source Qs needs to be set higher than the voltage of the highest LED lamp, so that the current limiting module can work normally and the current of each load can be ensured to be equal to a preset value; so that the brightness emitted by all LED lamps is uniform.
In this scheme, when the voltage of one or a few of the LED lamps is particularly high and the voltages of the remaining LED lamps are relatively low, the losses of the current limiting modules of the load branches with relatively low lamp voltages are particularly high, so that the losses of the whole lighting system are also high, which is not beneficial to the improvement of the efficiency of the lighting system.
In the field of plant illumination, high efficiency and low loss are pursued, and the requirements on the brightness consistency of the LED lamps are lower, so that the efficiency of an illumination system is more important; therefore, the above-described driving scheme cannot be well used in the field of plant illumination.
Disclosure of Invention
In order to solve the technical problems, the application discloses a control method of a plant lighting system, aiming at the problems, by setting the current limiting value of an LED load branch and controlling the current limiting value of the LED load branch to rise gradually, the loss of the LED load branch caused by lower lamp voltage is reduced, and the control method can enable the output voltage of the set constant voltage power supply to be higher, so that the loss of a current limiting module in the load branch with lower original LED lamp voltage is reduced, the loss of the whole lighting system is reduced, and the efficiency of the lighting system is improved.
In order to achieve the above object, the present application provides a control method of a plant lighting system, where the plant lighting system includes at least two LED load branches, and the LED load branches include a current limiting module and at least two LED lamps; the method comprises the following steps:
obtaining a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage;
the current limiting value of the target LED load branch is controlled to rise to a first target limiting value according to a preset step length;
determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of the current limiting module in the first LED load branch;
judging whether the first loss data is lower than a preset loss value or not;
and if yes, controlling the first LED load branch to work at the first target current limiting value.
In one embodiment, the method further comprises:
if the first loss data is not lower than the preset loss value, the first target current limiting value is controlled to rise to a second target current limiting value according to a preset step length;
determining a second LED load branch corresponding to a second target current limiting value, and acquiring second loss data of the current limiting module in the second LED load branch;
judging whether the second loss data is lower than a preset loss value or not;
if not, controlling the current limiting module in the second LED load branch to work in a preset working mode; wherein the preset working mode is an on-off mode.
In one embodiment, after the controlling the current limiting module in the second LED load branch to operate in the preset operation mode, the method further includes:
determining a third LED load branch working in a preset working mode, and acquiring third loss data when a control tube in the current limiting module in the third LED load branch is in a conducting state;
judging whether the third loss data is lower than a preset loss value or not;
if not, the duty ratio of the control tube is reduced.
In one embodiment, during the process that the control tube in the current limiting module is in a conducting state, the method further comprises:
obtaining a current value and a third target current limit value in the third LED load branch circuit;
judging whether the current value is higher than a third target current limit value or not;
if so, increasing the impedance of the control tube.
In one embodiment, the obtaining the first loss data of the current limiting module in the first LED load branch includes:
acquiring a first current value of the first LED load branch and a first voltage value at two ends of the current limiting module in the first LED load branch;
and calculating to obtain first loss data of the current limiting module according to the first current value and the first voltage value.
In one embodiment, the controlling the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step length includes:
comparing a first target current limiting value of the target LED load branch with a preset current limiting value threshold after the current limiting value of the target LED load branch is increased by a preset step current value to obtain a first comparison result;
judging whether the first comparison result meets a second preset condition or not;
if yes, the current limiting value is controlled to be increased to a first target limiting value according to a preset step length.
In one embodiment, the method further comprises controlling the target LED load branch to operate at the current limiting value if the first comparison result does not meet a second preset condition, and controlling the current limiting module to operate in a preset operation mode; wherein the preset working mode is an on-off mode.
The application also provides a control device of the plant lighting system, the plant lighting system comprises at least two paths of LED load branches, and the LED load branches comprise a current limiting module and at least two LED lamps; the device comprises:
the voltage acquisition module is used for acquiring lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
the first determining module is used for determining target lamp voltages meeting first preset conditions from all lamp voltages according to the preset voltage values of the load branches and determining target LED load branches corresponding to the target lamp voltages;
the first control module is used for controlling the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step length;
the second determining module is used for determining a first LED load branch corresponding to a first target current limiting value and acquiring first loss data of the current limiting module in the first LED load branch;
the first judging module is used for judging whether the first loss data is lower than a preset loss value or not;
and the second control module is used for controlling the first LED load branch to work at the first target current limiting value if the first loss data is a first preset loss value.
The application also provides a control terminal of a plant lighting system, the terminal comprises a processor and a memory, at least one instruction or at least one section of program is stored in the memory, and the at least one instruction or the at least one section of program is loaded and executed by the processor to realize the control method of the plant lighting system.
The application also provides a driving circuit of the plant lighting system, which comprises a constant voltage power supply, a control terminal and at least two paths of LED load branches; the control terminal is the control terminal of the plant lighting system;
each two paths of LED load branches are connected in parallel, and each path of LED load branch is connected with a constant voltage power supply in series;
the LED load branch circuit comprises a current limiting module and at least two LED lamps, and each LED lamp are connected in series;
the current limiting module is electrically connected with the control terminal.
The embodiment of the application has the following beneficial effects:
according to the control method of the plant lighting system, the current limiting value of the LED load branch is set, and the current limiting value of the LED load branch is controlled to be gradually increased, so that the loss of the LED load branch caused by lower lamp voltage is reduced, the output voltage of the set constant-voltage power supply is higher through the driving circuit, the loss of the current limiting module in the load branch with lower original LED lamp voltage is reduced, the loss of the whole lighting system is reduced, and the efficiency of the lighting system is improved.
Drawings
In order to more clearly illustrate the control method, device, terminal and driving circuit of the plant lighting system according to the present application, the drawings required for the embodiments will be briefly described, and it will be apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an LED driving circuit for plant illumination according to an embodiment of the present application;
fig. 2 is a flow chart of a control method of a plant lighting system according to an embodiment of the present application;
FIG. 3 is a flow chart of another control method of a plant lighting system according to an embodiment of the present application;
fig. 4 is a flow chart of a control method for reducing the duty ratio of a control tube of a plant lighting system according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a control device of a plant lighting system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a control terminal of a plant lighting system according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Referring to fig. 1, fig. 1 shows a driving circuit that may be used to implement an embodiment of the present application, and as shown in fig. 1, the driving circuit includes a constant voltage power supply 1, a control terminal 2, and at least two LED load branches 3: the control terminal is a control terminal of the plant lighting system;
each two paths of LED load branches 3 are connected in parallel, and each path of LED load branch 3 is connected with the constant voltage power supply 1 in series;
the LED load branch 3 comprises a current limiting module 310 and at least two LED lamps 320, each LED lamp 320 and the current limiting module 310 being connected in series;
specifically, every two LED lamps 320 are connected in series;
the current limiting module 310 is electrically connected to the control terminal 2.
The control terminal 2 may comprise a display, a memory device and a processor connected by a data bus. The display screen is used for displaying an operation interface or interacting with a user and the like, and can be a touch screen of a car machine, a mobile phone or a tablet personal computer and the like. The storage device is used for storing program codes, data materials and the like of the shooting device, and the storage device can be a memory of the control terminal 2, or can be a storage device such as a smart media card (smart media card), a secure digital card (secure digital card), a flash memory card (flash card) and the like. The processor may be a single-core or multi-core processor.
The following describes the control method of the LED driving circuit based on the plant lighting system according to the application with reference to fig. 2, and the control method of the LED driving circuit can be applied to the plant lighting field.
Referring to fig. 2, a flow chart of a control method of a plant lighting system according to an embodiment of the present application is shown, and the present disclosure provides the steps of the method according to the embodiment or the flow chart, but based on the conventional method; or the non-inventive labor may include more or fewer operational steps. The sequence of steps listed in the embodiments is only one way of a plurality of execution sequences of steps, does not represent a unique execution sequence, and the control method of the plant lighting system may be executed in the sequence of the methods shown in the embodiments or the drawings. As shown in fig. 2, the method includes: the method is used for controlling the LED driving circuit for plant illumination;
s201, obtaining a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
it should be noted that, in the embodiment of the present disclosure, the lamp voltage may be a total series voltage of all LED lamps in each load branch, where one lamp voltage corresponds to one LED load branch one by one;
in the embodiment of the present disclosure, the lamp voltage of the LED load branch may be the sum of voltages exhibited by all LED lamps in the LED load branch when the LED load branch flows through the rated current;
in the embodiment of the present disclosure, among the plurality of LED load branches in the driving circuit, a lamp voltage corresponding to at least one LED load branch is lower than a preset voltage value of the load branch.
S203, determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage;
in the embodiment of the present specification, comparing each obtained lamp voltage with a preset voltage value of a load branch, so as to determine a target lamp voltage meeting a first preset condition from all lamp voltages;
the first preset condition may be that a voltage value of the lamp voltage is lower than a preset voltage value of the load branch;
that is, the voltage value of the target lamp voltage is lower than the preset voltage value of the load branch circuit;
after the target lamp voltage is determined, determining a target LED load branch corresponding to the target lamp voltage according to the corresponding relation between the lamp voltage and the LED load branch, wherein the target lamp voltage at least comprises one.
S205, controlling the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step length;
in the embodiment of the present disclosure, when the current limit value of the LED load branch needs to be increased according to the preset step, the current limit value of the LED load branch after the current limit value of the LED load branch is increased by the preset step current value is compared with the preset current limit value threshold, and if the current limit value of the LED load branch after the current limit value of the LED load branch is increased by the preset step current value is less than or equal to the preset current limit value threshold, the current limit value of the LED load branch is increased by the preset step current value.
In the present embodiment, the preset current limit threshold is related to the power of the LED load branch.
Specifically, in the embodiment of the present specification, after determining a target LED load branch, a current limiting value of the target LED load branch is obtained, and a first target limiting value obtained by increasing the current limiting value of the target LED load branch by a preset step current value is compared with a preset limiting value threshold to obtain a first comparison result;
judging whether the first comparison result meets a second preset condition or not;
in the embodiment of the present disclosure, the second preset condition may be that the first target current limit value is equal to or less than a preset current limit value threshold value;
if yes, the current limiting value is controlled to be increased to a first target limiting value according to a preset step length.
In the embodiment of the present disclosure, if the first comparison result meets the second preset condition, that is, the first target current limit value is less than or equal to the preset current limit value threshold value; the current limiting value is controlled to be increased to a first target limiting value according to a preset step length.
In the embodiment of the present disclosure, if the first comparison result does not meet the second preset condition, that is, the first target current limit value is greater than the preset current limit value threshold, the target LED load branch is controlled to operate with the current limit value, and the current limit module is controlled to operate in a preset operation mode; wherein the preset working mode is an on-off mode.
When the current limiting module works in an on-off mode, a control tube in the current limiting module works in an on-off circulation mode;
in the embodiment of the specification, the brightness of the LED lamp in the LED load branch circuit can be improved by improving the current limiting value, namely the power of the LED load branch circuit is improved; when the current limiting value in the current limiting module is increased, the driving voltage of the control tube is increased, so that the impedance of the control tube is reduced, and the impedance of two ends of the current limiting module can be controlled to be reduced.
S207, determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of the current limiting module in the first LED load branch;
the first LED load branch may be a load branch after increasing the current limit value of the target LED load branch to the first target limit value; the number of the first LED load branches corresponds to the number of the target LED load branches one by one.
In this embodiment of the present disclosure, acquiring the first loss data may include the steps of:
acquiring a first current value of the first LED load branch and a first voltage value at two ends of the current limiting module in the first LED load branch;
in this embodiment of the present disclosure, the first current value may be a real-time current value of the first LED load branch;
in the embodiment of the specification, detecting real-time current values at two ends of an Rs resistor in a current limiting module in a current LED load branch, and taking the real-time current values at two ends of the Rs resistor as a first current value;
and calculating to obtain first loss data of the current limiting module according to the first current value and the first voltage value.
In the present embodiment, the first loss data may be a result of multiplying the first current value and the first voltage value;
specifically, the first loss value obtained by calculation may be actually the power value of the control tube in the current limiting module, and since the loss value of the control tube in the loss of the current limiting module occupies most part, the loss of other devices in the current limiting module can be ignored.
S209, judging whether the first loss data is lower than a preset loss value;
s211, if yes, controlling the first LED load branch to work at the first target current limiting value;
in this embodiment of the present disclosure, if the first loss data of the current limiting module in the first LED load branch is lower than the preset loss data; and controlling the first LED load branch to work at the first target current limiting value.
In the embodiment of the present disclosure, as shown in fig. 3, a flow chart of another control method of a plant lighting system provided by the embodiment of the present disclosure is shown, and specifically includes the following steps:
s301, obtaining a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
s303, determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage;
s305, controlling the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step length;
s307, determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of the current limiting module in the first LED load branch;
s309, judging whether the first loss data is lower than a preset loss value;
s311, if the first loss data is not lower than the preset loss value, the first target current limiting value is controlled to rise to a second target current limiting value according to a preset step length;
in this embodiment of the present disclosure, controlling the first target current limit value to rise to the second target current limit value according to a preset step includes the steps of:
specifically, in the embodiment of the present disclosure, after determining that the first loss data of the current limiting module in the first LED load branch is not lower than the preset loss value, comparing a second target current limiting value obtained by increasing the first target current limiting value of the first LED load branch by a preset step current value with a preset current limiting value threshold, to obtain a second comparison result;
judging whether the second comparison result meets a third preset condition or not;
in the embodiment of the present specification, the third preset condition may be that the second target current limit value is equal to or less than a preset current limit value threshold value;
if yes, the first target current limiting value is controlled to be increased to a second target current limiting value according to a preset step length.
In the embodiment of the present disclosure, if the second comparison result meets a third preset condition, that is, the second target current limit value is less than or equal to the preset current limit value threshold value; the first target current limiting value is controlled to be increased to a second target current limiting value according to a preset step length.
In this embodiment of the present disclosure, if the second comparison result does not meet the third preset condition, that is, the second target current limit value is greater than the preset current limit value threshold, the first LED load branch is controlled to operate with the first target current limit value, and the current limit module is controlled to operate in a preset operation mode; wherein the preset working mode is an on-off mode.
S313, determining a second LED load branch corresponding to a second target current limiting value, and acquiring second loss data of the current limiting module in the second LED load branch;
the second LED load branch may be an LED load branch with loss data selected from at least one first LED load branch not lower than a preset loss value;
in the embodiment of the present specification, acquiring the second loss data may include the steps of:
acquiring a second current value of the second LED load branch and a second voltage value at two ends of the current limiting module in the second LED load branch;
in this embodiment of the present disclosure, the second current value may be a real-time current value of the second LED load branch;
and calculating to obtain second loss data of the current limiting module according to the second current value and the second voltage value.
In the embodiment of the present specification, the second loss data may be a result of multiplying the second current value and the second voltage value;
s315, judging whether the second loss data is lower than a preset loss value or not;
s317, if not, controlling the current limiting module in the second LED load branch to work in a preset working mode; wherein the preset working mode is an on-off mode.
In this embodiment of the present disclosure, if the second loss data is lower than a preset loss value, the second LED load branch is controlled to operate at the second target current limit value.
In this embodiment of the present disclosure, as shown in fig. 4, which is a schematic flow chart of a control method for reducing a duty ratio of a control tube of a plant lighting system provided in the embodiment of the present disclosure, specifically, after the current limiting module in the second LED load branch is controlled to work in a preset working mode, the method further includes the following steps:
s401, determining a third LED load branch working in a preset working mode, and acquiring third loss data when a control tube in the current limiting module in the third LED load branch is in a conducting state;
the third LED load branch may be an LED load branch when the current limiting module in the second LED load is operated in the on-off mode.
In the embodiment of the present specification, acquiring the third loss data may include the steps of:
acquiring a third current value of a third LED load branch when the control tube is in a conducting state and a third voltage value of two ends of the current limiting module in the second LED load branch when the control tube is in the conducting state;
in the embodiment of the present disclosure, the third current value may be a real-time current value of the third LED load branch when the control tube is in the on state;
and calculating to obtain second loss data of the current limiting module according to the third current value and the third voltage value.
In the present embodiment, the third loss data may be a result of multiplying the third current value and the third voltage value;
s403, judging whether the third loss data is lower than a preset loss value;
and S405, if not, reducing the duty ratio of the control tube.
In another embodiment of the present disclosure, during the process that the control tube in the current limiting module is in a conductive state, the method further includes:
obtaining a current value and a third target current limit value in the third LED load branch circuit;
in the embodiment of the present disclosure, the current value in the third LED load branch may be a real-time current value of the third LED load branch when the control tube is in the on state;
judging whether the current value is higher than a third target current limit value or not;
if yes, increasing the impedance of the control tube;
in the present description embodiment, increasing the impedance of the control tube to reduce the real-time current value in the third LED load branch; so that the current value is equal to or less than the third target current limit value.
As can be seen from the embodiments of the control method, the device and the terminal of the plant lighting system provided by the application, the embodiments of the application obtain the lamp voltage corresponding to each LED load branch and the preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch; determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage; the current limiting value of the target LED load branch is controlled to rise to a first target limiting value according to a preset step length; determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of the current limiting module in the first LED load branch; judging whether the first loss data is lower than a preset loss value or not; if yes, controlling the first LED load branch to work at the first target current limiting value; by using the technical scheme provided by the embodiment of the specification, the current limiting value of the LED load branch is set, and the current limiting value of the LED load branch is controlled to be gradually increased, so that the loss of the LED load branch caused by lower lamp voltage is reduced.
The embodiment of the application also provides a control device of the plant lighting system, as shown in fig. 5, which is a schematic structural diagram of the control device of the plant lighting system provided by the embodiment of the application; specifically, the plant lighting system comprises at least two paths of LED load branches, wherein each LED load branch comprises a current limiting module and at least two LED lamps; the device comprises:
the voltage obtaining module 510 is configured to obtain a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, where the lamp voltage is a total series voltage of each LED lamp in the LED load branch;
a first determining module 520, configured to determine, according to the load branch preset voltage value, a target lamp voltage that meets a first preset condition from all lamp voltages, and determine a target LED load branch corresponding to the target lamp voltage;
a first control module 530, configured to control the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step size;
a second determining module 540, configured to determine a first LED load branch corresponding to a first target current limit value, and obtain first loss data of the current limiting module in the first LED load branch;
a first determining module 550, configured to determine whether the first loss data is lower than a preset loss value;
and the second control module 560 is configured to control the first LED load branch to operate at the first target current limit value if the first loss data is a first preset loss value.
In this embodiment of the present specification, further includes:
the third control module is used for controlling the first target current limiting value to rise to a second target current limiting value according to a preset step length if the first loss data is not lower than a preset loss value;
the third determining module is used for determining a second LED load branch corresponding to a second target current limiting value and acquiring second loss data of the current limiting module in the second LED load branch;
the second judging module is used for judging whether the second loss data is lower than a preset loss value or not;
the fourth control module is used for controlling the current limiting module in the second LED load branch to work in a preset working mode if the second loss data is not lower than a preset loss value; wherein the preset working mode is an on-off mode.
In this embodiment of the present specification, further includes:
a fourth determining module, configured to determine a third LED load branch operating in a preset operation mode, and obtain third loss data when a control tube in the current limiting module in the third LED load branch is in a conducting state;
the third judging module is used for judging whether the third loss data is lower than a preset loss value or not;
and the fifth control module is used for reducing the duty ratio of the control tube if the third loss data is not lower than the preset loss value.
In this embodiment of the present specification, further includes:
the first acquisition unit is used for acquiring a current value and a third target current limit value in the third LED load branch;
a first judging unit configured to judge whether the current value is higher than a third target current limit value;
and the first control unit is used for increasing the impedance of the control tube if the current value is higher than the third target current limit value.
In the embodiment of the present specification, the second determining module 540 includes:
the second acquisition unit is used for acquiring a first current value of the first LED load branch and a first voltage value at two ends of the current limiting module in the first LED load branch;
and the calculating unit is used for calculating and obtaining first loss data of the current limiting module according to the first current value and the first voltage value.
In the embodiment of the present disclosure, the first control module 530 includes:
the comparison unit is used for comparing a first target current limiting value obtained by increasing the current limiting value of the target LED load branch by a preset step current value with a preset current limiting value threshold value to obtain a first comparison result;
the second judging unit is used for judging whether the first comparison result meets a second preset condition or not;
and the second control unit is used for controlling the current limiting value to be increased to a first target current limiting value according to a preset step length if the first comparison result meets a second preset condition.
In the embodiment of the present disclosure, the first control module 530 further includes:
the third control unit is used for controlling the target LED load branch to work at the current limiting value and controlling the current limiting module to work in a preset working mode if the first comparison result does not meet a second preset condition; wherein the preset working mode is an on-off mode.
The embodiment of the application provides a control terminal of a plant lighting system, which comprises a processor and a memory, wherein at least one instruction or at least one section of program is stored in the memory, and the at least one instruction or the at least one section of program is loaded and executed by the processor to realize the control method of the plant lighting system.
The memory may be used to store software programs and modules that the processor executes to perform various functional applications and data processing by executing the software programs and modules stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, application programs required for functions, and the like; the storage data area may store data created according to the use of the device, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory may also include a memory controller to provide access to the memory by the processor.
Fig. 6 is a schematic structural diagram of a control terminal of a plant lighting system according to an embodiment of the present application, and the internal configuration of the control terminal of the plant lighting system may include, but is not limited to: the processor, network interface and memory within the control terminal of the plant lighting system may be connected by a bus or other means, as exemplified by the bus connection in fig. 6 shown in the present embodiment of the application.
Among them, the processor (or CPU (Central Processing Unit, central processing unit)) is a computation core and a control core of the control terminal of the plant lighting system. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI, mobile communication interface, etc.). A Memory (Memory) is a Memory device in the control terminal of the plant lighting system for storing programs and data. It will be appreciated that the memory herein may be a high speed RAM memory device or a non-volatile memory device, such as at least one magnetic disk memory device; optionally, at least one memory device located remotely from the processor. The memory provides a storage space storing an operating system of a control terminal of the plant lighting system, which may include, but is not limited to: windows (an operating system), linux (an operating system), etc., as the present application is not limited in this regard; also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. In the embodiment of the present disclosure, the processor loads and executes one or more instructions stored in the memory to implement the LED driving circuit for plant illumination provided in the above-described method embodiment.
Embodiments of the present application also provide a computer-readable storage medium that may be provided in a control terminal of a plant lighting system to store at least one instruction, at least one program, a code set, or an instruction set related to an LED driving circuit for plant lighting in order to implement one of the method embodiments, the at least one instruction, the at least one program, the code set, or the instruction set being loadable and executable by a processor of an electronic device to implement the control method of the plant lighting system provided by the method embodiments described above.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that: the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing description has been directed to specific embodiments of this specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the device and server embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and references to the parts of the description of the method embodiments are only required.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above disclosure is only a preferred embodiment of the present application, and it is needless to say that the scope of the application is not limited thereto, and therefore, the equivalent changes according to the claims of the present application still fall within the scope of the present application.

Claims (10)

1. A control method of a plant lighting system, characterized by: the plant lighting system comprises at least two paths of LED load branches, wherein each LED load branch comprises a current limiting module and at least two LED lamps; the method comprises the following steps:
obtaining a lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
determining a target lamp voltage with a voltage value lower than the preset voltage value of the load branch from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage;
the current limiting value of the target LED load branch is controlled to rise to a first target limiting value according to a preset step length;
determining a first LED load branch corresponding to a first target current limiting value, and acquiring first loss data of the current limiting module in the first LED load branch;
judging whether the first loss data is lower than a preset loss value or not;
and if yes, controlling the first LED load branch to work at the first target current limiting value.
2. The control method of a plant lighting system according to claim 1, characterized in that: further comprises:
if the first loss data is not lower than the preset loss value, the first target current limiting value is controlled to rise to a second target current limiting value according to a preset step length;
determining a second LED load branch corresponding to a second target current limiting value, and acquiring second loss data of the current limiting module in the second LED load branch;
judging whether the second loss data is lower than a preset loss value or not;
if not, the current limiting module in the second LED load branch is controlled to work in an on-off mode, and when the current limiting module works in the on-off mode, the control tube in the current limiting module works in an on-off circulation mode.
3. A control method of a plant lighting system according to claim 2, characterized in that: after the current limiting module in the second LED load branch is controlled to work in the preset working mode, the method further comprises:
determining a third LED load branch working in a preset working mode, and acquiring third loss data when a control tube in the current limiting module in the third LED load branch is in a conducting state;
judging whether the third loss data is lower than a preset loss value or not;
if not, the duty ratio of the control tube is reduced.
4. A control method of a plant lighting system according to claim 3, characterized in that: in the process that the control tube in the current limiting module is in a conducting state, the current limiting module further comprises:
obtaining a current value and a third target current limit value in the third LED load branch circuit;
judging whether the current value is higher than a third target current limit value or not;
if so, increasing the impedance of the control tube.
5. The control method of a plant lighting system according to claim 1, characterized in that: the obtaining the first loss data of the current limiting module in the first LED load branch includes:
acquiring a first current value of the first LED load branch and a first voltage value at two ends of the current limiting module in the first LED load branch;
and calculating to obtain first loss data of the current limiting module according to the first current value and the first voltage value.
6. The control method of a plant lighting system according to claim 1, characterized in that: the step of controlling the current limiting value of the target LED load branch to be increased to a first target limiting value according to a preset step length comprises the following steps:
comparing a first target current limiting value of the target LED load branch with a preset current limiting value threshold after the current limiting value of the target LED load branch is increased by a preset step current value to obtain a first comparison result;
judging whether the first comparison result meets a second preset condition or not, wherein the second preset condition is that a first target current limit value is smaller than or equal to a preset current limit value threshold value;
if yes, the current limiting value is controlled to be increased to a first target limiting value according to a preset step length.
7. The method of controlling a plant lighting system according to any one of claim 6, further comprising:
and if the first comparison result does not meet the second preset condition, controlling the target LED load branch to work at the current limiting value, and controlling the current limiting module to work in an on-off mode, wherein when the current limiting module works in the on-off mode, a control tube in the current limiting module works in an on-off circulation mode.
8. A control device of a plant lighting system, characterized in that: the plant lighting system comprises at least two paths of LED load branches, wherein each LED load branch comprises a current limiting module and at least two LED lamps; the device comprises:
the voltage acquisition module is used for acquiring lamp voltage corresponding to each LED load branch and a preset voltage value of the load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branch;
the first determining module is used for determining a target lamp voltage with a voltage value lower than the preset voltage value of the load branch from all lamp voltages according to the preset voltage value of the load branch, and determining a target LED load branch corresponding to the target lamp voltage;
the first control module is used for controlling the current limiting value of the target LED load branch to rise to a first target limiting value according to a preset step length;
the second determining module is used for determining a first LED load branch corresponding to a first target current limiting value and acquiring first loss data of the current limiting module in the first LED load branch;
the first judging module is used for judging whether the first loss data is lower than a preset loss value or not;
and the second control module is used for controlling the first LED load branch to work at the first target current limiting value if the first loss data is a first preset loss value.
9. Control terminal of plant lighting system, its characterized in that: the terminal comprising a processor and a memory, the memory having stored therein at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to implement the method of controlling a plant lighting system according to any one of claims 1-7.
10. An LED driving circuit of a plant lighting system, characterized in that: the LED load circuit comprises a constant voltage power supply, a control terminal and at least two paths of LED load branches; the control terminal is the control terminal of the plant lighting system of claim 9;
each two paths of LED load branches are connected in parallel, and each path of LED load branch is connected with a constant voltage power supply in series;
the LED load branch circuit comprises a current limiting module and at least two LED lamps, and each LED lamp are connected in series;
the current limiting module is electrically connected with the control terminal.
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