CN113473676A - Control method and device of LED driving circuit for plant illumination and terminal - Google Patents
Control method and device of LED driving circuit for plant illumination and terminal Download PDFInfo
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Abstract
The invention discloses a control method, a device and a terminal of an LED drive circuit for plant illumination, wherein the method comprises the following steps: acquiring a lamp voltage corresponding to each LED load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branches; determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage; on the basis of the target LED load branch, controlling a first control tube connected in parallel with the target LED load branch to be conducted to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch; acquiring a current signal of a current LED load branch circuit; according to the current signal and the preset current limiting value of the current LED load branch circuit, the impedance of the first control tube is adjusted.
Description
Technical Field
The invention relates to the technical field of multi-path LED driving circuits, in particular to a control method, a control device and a control terminal of an LED driving circuit for plant illumination.
Background
In some lighting occasions, a plurality of LED lamp beads are required to be arranged in the lamp, and all the LED lamp beads cannot be connected in series at one step, so that the mode of a multi-path LED lamp is set. Because the indoor illumination needs the consistent brightness of each path of the multiple paths of LEDs; therefore, in the circuit design under the scene, the output voltage of the preceding-stage constant voltage source Qs is higher than the voltage of the highest LED lamp, so that the current limiting module can work normally, and each load current can be equal to the preset value; so that the brightness of all the 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 loss of the current-limiting module of the load branch circuits with relatively low lamp voltage is particularly high, which results in high loss of the whole lighting system, and is not favorable for improving the efficiency of the lighting system.
In the field of plant illumination, high efficiency and low loss are pursued, the requirement on the brightness consistency of the LED lamp is low, and the efficiency of an illumination system is emphasized; therefore, the above driving scheme cannot be well used in the field of plant lighting;
however, in order to reduce the loss of the lighting system, if the output voltage of the constant voltage source is simply reduced, the load branch with higher lamp voltage will not work, i.e. will not emit light, and the lighting will not be performed effectively.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a control method of an LED drive circuit for plant lighting, which can adjust an LED load branch circuit with a lamp voltage higher than the output voltage when the output voltage of a constant voltage power supply is lower, and particularly, adjust the impedance of a first control tube of the current LED load branch circuit to enable the current value of the current LED load branch circuit to be equal to a preset current limiting value, so that the LED load branch circuit with the higher lamp voltage can normally work originally, 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 invention provides a method for controlling an LED driving circuit for plant lighting, comprising: the LED driving circuit comprises a constant voltage power supply, at least two LED load branches and at least two first control tubes; the control method is used for controlling the LED drive circuit; the method comprises the following steps:
acquiring a lamp voltage corresponding to each LED load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branches;
determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage;
based on the target LED load branch, controlling a first control tube connected with the target LED load branch in parallel to be conducted to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
acquiring a current signal of the current LED load branch circuit;
and adjusting the impedance of the first control tube according to the current signal and a preset current limiting value of the current LED load branch.
In one embodiment, the adjusting the impedance of the first control tube further comprises:
acquiring the working state of the first control tube;
judging whether the working state of the first control tube meets a second preset condition or not;
and if so, reducing the preset current limiting value of the current LED load branch.
In one embodiment, the acquiring the operating state of the first control tube includes:
acquiring the current lamp voltage of the current LED load branch where the first control tube is located;
and determining the working state of the first control tube in the current LED load branch circuit according to the current lamp voltage and the output voltage of the constant voltage power supply.
In one embodiment, after the reducing the preset current limiting value of the current LED load branch, the method further includes:
acquiring a preset current value of the LED load branch, wherein the preset current value is the lowest current value of the LED load branch;
comparing the current signal with the preset current value to obtain a first comparison result;
judging whether the first comparison result meets a third preset condition or not;
if yes, the second control tube is controlled to be conducted.
In one embodiment, the adjusting the impedance of the first control tube according to the current signal and the preset current limiting value of the current LED load branch comprises:
comparing the current signal with the preset current limiting value to obtain a second comparison result;
judging whether the second comparison result meets a fourth preset condition or not;
if not, adjusting the impedance of the first control tube.
The application also provides a control device of the LED drive circuit for plant illumination, wherein the LED drive circuit comprises a constant voltage power supply, at least two LED load branches and at least two first control tubes; the control device is used for controlling the LED drive circuit; the device comprises:
the system comprises a lamp voltage acquisition module, a lamp voltage acquisition module and a control module, wherein the lamp voltage acquisition module is used for acquiring a lamp voltage corresponding to each LED load branch, and the lamp voltage is the total serial voltage of each LED lamp in the LED load branches;
the determining module is used for determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply and determining a target LED load branch circuit corresponding to the target lamp voltage;
the first control module is used for controlling a first control tube connected with the target LED load branch in parallel to be conducted on the basis of the target LED load branch to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
the current signal acquisition module is used for acquiring a current signal of the current LED load branch circuit;
and the adjusting module is used for adjusting the impedance of the first control tube according to the current signal and the preset current limiting value of the current LED load branch.
The application also provides a control terminal of the LED driving circuit for plant illumination, the terminal comprises a processor and a memory, wherein at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded and executed by the processor to realize the control method of the LED driving circuit for plant illumination.
The application also provides a LED drive circuit for plant illumination, including constant voltage power supply, control terminal, two at least LED load branch roads and two at least first control tubes:
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 comprises a current limiting module and at least two LED lamps, and each LED lamp is connected with the current limiting module in series;
each LED load branch is connected with the non-control end of at least one first control tube in parallel, wherein a circuit formed by the LED load branch and the first control tube in parallel comprises the current limiting module and at least one LED lamp;
and the control end of the first control tube is electrically connected with the control terminal.
In one embodiment, the control terminal comprises a main control unit and at least two switch control units;
the main control unit is electrically connected with each switch control unit respectively;
each switch control unit is electrically connected with the control end of the first control tube;
the switch control units correspond to the first control tubes one by one.
In one embodiment, further comprising at least two second control tubes;
each path of the LED load branch circuit is also connected with a non-control end of one second control tube in parallel, wherein a circuit formed by the LED load branch circuit and the second control tube in parallel comprises the current limiting module and at least two LED lamps;
and the control end of the second control tube is electrically connected with the control terminal.
The embodiment of the invention has the following beneficial effects:
according to the control method of the LED drive circuit for plant illumination, when the output voltage of the constant voltage power supply is low, the LED load branch circuit with the lamp voltage higher than the output voltage can be adjusted, and specifically, the current value of the current LED load branch circuit is equal to the preset current limiting value by adjusting the impedance of the first control tube of the current LED load branch circuit, so that the LED load branch circuit with the higher lamp voltage originally can work normally, the loss of the whole illumination system is reduced, and the efficiency of the illumination system is improved.
According to the LED driving circuit for plant illumination, the lamp voltage of the LED load branch is adjusted through the first control tube and the control terminal, so that the output voltage of the constant voltage power supply is lower, the LED load branch with the higher lamp voltage originally can work normally, the loss of the whole illumination system is reduced, and the efficiency of the illumination system is improved.
Drawings
In order to more clearly illustrate the LED driving circuit, the control method, the device and the terminal for plant illumination according to the present invention, the drawings required for the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LED driving circuit for plant illumination according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another LED driving circuit for plant illumination according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a control method of an LED driving circuit for plant illumination according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for adjusting the impedance of the first control tube according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for adjusting a preset restriction value according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of another control method of an LED driving circuit for plant illumination according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control device of an LED driving circuit for plant illumination according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a control terminal of an LED driving circuit for plant illumination according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or 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, 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 for implementing the solution of the present invention, as shown in fig. 1, the driving circuit includes a constant voltage power supply 1, a control terminal 2, at least two LED load branches 3, and at least two first control tubes 4:
each two paths of the LED load branches 3 are connected in parallel, and each path of the 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, wherein each LED lamp 320 is connected in series with the current limiting module 310;
specifically, every two LED lamps 320 are connected in series;
each of the LED load branches 3 is connected in parallel to at least a non-control end of one of the first control tubes 4, wherein a circuit formed by connecting the LED load branch 3 in parallel to the first control tube 4 includes the current limiting module 310 and at least one of the LED lamps 320;
the control end of the first control tube 4 is electrically connected with the control terminal 2; in the application, the lamp voltage of the LED load branch 3 is adjusted through the first control tube 4 and the control terminal 2, so that the output voltage of the constant voltage power supply 1 is lower, and the LED load branch 3 with the higher lamp voltage can normally work originally, thereby reducing the loss of the whole lighting system and improving the efficiency of the lighting system;
specifically, the number of the first control tubes 4 corresponds to the number of the LED load branches 3.
In the embodiment of the present specification, the control terminal 2 includes a main control unit 210 and at least two switch control units 220;
the main control unit 210 is electrically connected to each of the switch control units 220;
each switch control unit 220 is electrically connected with the control end of the first control tube 4;
the switch control units 220 correspond to the first control tubes 4 one to one, so as to control the first control tubes 4.
In another embodiment of the present specification, as shown in fig. 2, another driving circuit provided in the present application and capable of being used to implement the embodiment of the present invention is shown; as shown in fig. 2, which contains all the drive units of fig. 1, and also includes at least two second control tubes 5;
each of the LED load branches 3 is further connected in parallel to a non-control end of one of the second control tubes 5, wherein a circuit formed by connecting the LED load branch 3 in parallel to the second control tube 5 includes the current limiting module 210 and at least two LED lamps 320;
the control end of the second control tube 5 is electrically connected with the control terminal 2;
specifically, the number of the second control tubes 5 corresponds to the number of the LED load branches 3.
Specifically, the control terminal 2 includes a main control unit 210 and at least four switch control units 220;
the main control unit 210 is electrically connected to each of the switch control units 220;
the control end of each second control tube 5 is electrically connected with one switch control unit 220;
the number of the switch control units 220 corresponds to the number of the first control tubes 4 and the second control tubes 5 one by one, so that the first control tubes 4 and the second control tubes 5 can be controlled.
In another embodiment of the present disclosure, at least two second control tubes may be further included;
preferably, at least two third control tubes and at least two fourth control tubes or at least two nth control tubes may be included, wherein the number of the parallel LED lamps in the N +1 th control tube and the LED load branch is greater than the number of the parallel LED lamps in the nth control tube. The design can make the control of the driving circuit more convenient and the data more accurate, thereby reducing the loss of the whole lighting system and improving the efficiency of the lighting system.
The main control unit 210 may include a display screen, 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 the display screen can be a touch screen of a vehicle machine, a mobile phone or a tablet computer and the like. The storage device is used for storing program codes, data and data of the photographing apparatus, and the storage device may be a memory of the main control unit 210, and may also be a storage device such as a smart media card (smart media card), a secure digital card (secure digital card), and a flash memory card (flash card). The processor may be a single core or multi-core processor.
According to the LED driving circuit for plant illumination, the lamp voltage of the LED load branch is adjusted through the first control tube and the control terminal, so that the output voltage of the constant voltage power supply is lower, the LED load branch with the higher lamp voltage originally can work normally, the loss of the whole illumination system is reduced, and the efficiency of the illumination system is improved.
The following describes a control method of an LED driving circuit, which can be applied to the field of plant lighting, based on the above-mentioned LED driving circuit for plant lighting, with reference to fig. 3.
Referring to fig. 3, which is a schematic flow chart illustrating a method for controlling an LED driving circuit for plant illumination according to an embodiment of the present invention, the present specification provides the method steps as described in the embodiment or the flow chart, but based on the conventional method; or the inventive process may include additional or fewer steps. The step sequence recited in the embodiments is only one of the execution sequences of many steps, and does not represent the only execution sequence, and the control method of the LED driving circuit for plant illumination may be executed according to the method sequence shown in the embodiments or the figures. Specifically, as shown in fig. 3, the method includes: the method is used for controlling the LED driving circuit for plant illumination as described above;
s301, obtaining a lamp voltage corresponding to each LED load branch, wherein the lamp voltage is the total serial voltage of each LED lamp in the LED load branch;
it should be noted that, in the embodiment of the present specification, the lamp voltage may be a total serial voltage of all the LED lamps in each load branch, where one lamp voltage corresponds to one LED load branch;
in this embodiment, 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 rated current flows through the LED load branch.
S303, determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage;
in the embodiment of the present specification, each obtained lamp voltage is compared with the output voltage of the constant voltage power supply, respectively, to select a target lamp voltage having a lamp voltage greater than the output voltage of the constant voltage power supply from among a plurality of lamp voltages; determining a target LED load branch circuit corresponding to the voltage of the target lamp according to the corresponding relation between the lamp voltage and the LED load branch circuit;
the first preset condition may be that the voltage value of the lamp voltage is higher than the output voltage of the constant voltage power supply;
namely, the voltage value of the target lamp voltage is higher than the output voltage of the constant voltage power supply;
and after the target lamp voltage is determined, determining a target LED load branch circuit corresponding to the target lamp voltage according to the corresponding relation between the lamp voltage and the LED load branch circuit.
Specifically, in a plurality of LED load branches in the driving circuit, the lamp voltage of at least one LED load branch is higher than the output voltage of the constant voltage power supply.
S305, controlling a first control tube connected in parallel with the target LED load branch to be conducted based on the target LED load branch to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
in the embodiment of the present specification, after a target LED load branch is determined, a first control tube connected in parallel with the target LED load branch is controlled to be turned on, so that a current limiting module and an LED lamp connected in parallel with the first control tube are short-circuited, and an LED lamp not connected in parallel with the first control tube in the target LED load branch is connected in series with the first control tube to form a new LED load branch, that is, a current LED load branch after the first control tube is turned on;
after the current LED load branch is obtained, a preset current limiting value of the preset current LED load branch can be determined;
the preset current limiting value can be less than or equal to a current value set in a current limiting module in the LED load branch;
preferably, the preset current limiting value may be equal to a current value set in a current limiting module in the LED load branch.
Specifically, in the embodiment of the present specification, the main control unit is configured to obtain a lamp voltage corresponding to each LED load branch, select a target lamp voltage from the multiple lamp voltages, and determine a target LED load branch corresponding to the target lamp voltage; and controlling the conduction of the first control tube, and determining a preset current limiting value in the current LED load branch after the conduction of the first control tube.
S307, acquiring a current signal of the current LED load branch;
in the embodiment of the present specification, the real-time current values at two ends of an Rs resistor in a switch control unit in a current LED load branch are detected, and the real-time current values at two ends of the Rs resistor are used as current signals.
Specifically, a switch control unit is used for detection.
S309, adjusting the impedance of the first control tube according to the current signal and the preset current limiting value of the current LED load branch.
In an embodiment of this specification, as shown in fig. 4, a flowchart of a method for adjusting an impedance of a first control tube according to an embodiment of the present invention specifically includes the following steps:
s401, comparing the current signal with the preset current limiting value to obtain a second comparison result;
in the embodiment of the present specification, comparing the obtained real-time current value of the current LED load branch with a preset current limiting value in the load branch; comparing the two current values as a second comparison result;
s403, judging whether the second comparison result meets a fourth preset condition;
in this embodiment of the present specification, the fourth preset condition may be that the current value of the current LED load branch is the real-time current value, that is, the current value is equal to the preset current limiting value;
judging whether the current value is equal to a preset current limiting value or not;
if the current value is equal to the preset current limiting value, judging that the second comparison result meets a fourth preset condition;
s405, if not, adjusting the impedance of the first control tube.
In the embodiment of the present specification, if the second comparison result does not satisfy the fourth preset condition, that is, the current value is greater than or less than the preset current limit value;
when the current value is larger than the preset current limit value, the impedance of the first control tube is increased to reduce the current value until the current value is equal to the preset current limit value;
when the current value is smaller than the preset current limiting value, the impedance of the first control tube is adjusted to be low so as to increase the current value until the current value is equal to the preset current limiting value.
In the embodiment of the present specification, as shown in fig. 5, a schematic flow chart of a method for adjusting a preset restriction value according to an embodiment of the present invention is shown; specifically, the method comprises the following steps:
s501, acquiring the working state of the first control tube;
in the embodiment of the present specification, the operating state of the first control tube includes that the first control tube operates in a linear state or that the first control tube operates in a saturation state;
wherein, the step of obtaining the working state of the first control tube comprises the following steps:
acquiring the current lamp voltage of the current LED load branch where the first control tube is located;
specifically, the current lamp voltage is the total voltage of all the LED lamps in the current LED load branch in series;
and determining the working state of the first control tube in the current LED load branch circuit according to the current lamp voltage and the output voltage of the constant voltage power supply.
In the embodiment of the present specification, the current lamp voltage is compared with the output voltage of the constant voltage power supply, and whether the current lamp voltage is less than or equal to the output voltage of the constant voltage power supply is determined;
if yes, the working state of the first control tube in the current LED load branch is the working online state of the first control tube;
specifically, when the current lamp voltage is less than or equal to the output voltage of the constant voltage power supply, the first control tube is enabled to work in a linear state based on the closed-loop regulation function of the switch control unit; namely, the impedance of the first control tube in operation is higher than the saturation impedance;
when the current lamp voltage is larger than the output voltage of the constant voltage power supply, the first control tube works in a saturated state because the switch control unit cannot perform closed-loop regulation;
s503, judging whether the working state of the first control tube meets a second preset condition or not;
in the embodiment of the present specification, the second preset condition may be that the first control tube operates in a saturation state;
and S505, if so, reducing the preset current limiting value of the current LED load branch.
In this embodiment, when the first control tube operates in a saturation state, the main control unit reduces the preset current limit value transmitted to the switching control unit.
In the embodiment of the present specification, as shown in fig. 6, a schematic flowchart of another control method of an LED driving circuit for plant illumination according to an embodiment of the present invention is shown;
s601, obtaining a lamp voltage corresponding to each LED load branch, wherein the lamp voltage is the total serial voltage of each LED lamp in the LED load branch;
s603, determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage;
s605, controlling a first control tube connected in parallel with the target LED load branch to be conducted based on the target LED load branch to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
s607, acquiring a current signal of the current LED load branch circuit;
s609, adjusting the impedance of the first control tube according to the current signal and a preset current limiting value of the current LED load branch;
s611, acquiring the working state of the first control pipe;
s613, judging whether the working state of the first control tube meets a second preset condition or not;
s615, if yes, reducing a preset current limiting value of the current LED load branch;
s617, obtaining a preset current value of the LED load branch, where the preset current value is a lowest current value of the LED load branch;
in the embodiment of the present specification, the preset current value is a preset lowest current value of the LED load branch;
when the current of the current LED load branch circuit is the lowest current value, the LED lamp in the load branch circuit is at the preset lowest brightness;
in this embodiment of the present specification, the preset current value may be a lowest current value of a current LED load branch connected in parallel with the first control tube after the first control tube is turned on;
s619, comparing the current signal with the preset current value to obtain a first comparison result;
in this specification embodiment, the first comparison result may be that the present current value represented by the present current signal is smaller than a preset current value; the present current value represented by the present current signal may be greater than or equal to the preset current value.
S621, judging whether the first comparison result meets a third preset condition;
in this specification embodiment, the third preset condition may be that the present current value represented by the present current signal is smaller than the preset current value;
and S623, if yes, controlling the second control tube to be conducted.
In this embodiment of the present description, if the current value represented by the current signal is smaller than the preset current value, the second control tube is controlled to be turned on, so that after the second control tube is turned on, the current value of the LED load branch connected in parallel with the second control tube is greater than or equal to the preset current value.
In another embodiment of the present specification, a third control tube may be further provided, wherein in the LED load branch, the number of LED lamps connected in parallel with the third control tube is greater than the number of LED lamps connected in parallel with the second control tube;
the design is convenient for controlling the conduction of the third control tube when the current value of the LED load branch circuit connected with the second control tube in parallel is still smaller than the preset current value after the second control tube is conducted.
Preferably, a fourth control tube, a fifth control tube or more nth control tubes can be further provided, wherein the number of the parallel LED lamps in the (N + 1) th control tube and the LED load branch is greater than the number of the parallel LED lamps in the nth control tube. The design can make the control of the driving circuit more convenient and the data more accurate, thereby reducing the loss of the whole lighting system and improving the efficiency of the lighting system.
As can be seen from the above embodiments of the method, the device and the terminal for controlling the LED driving circuit for plant lighting provided by the present invention, in the embodiments of the present invention, a lamp voltage corresponding to each LED load branch is obtained, where the lamp voltage is a 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 output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage; based on the target LED load branch, controlling a first control tube connected with the target LED load branch in parallel to be conducted to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch; acquiring a current signal of the current LED load branch circuit; adjusting the impedance of the first control tube according to the current signal and a preset current limiting value of the current LED load branch; by utilizing the technical scheme provided by the embodiment of the specification, when the output voltage of the constant voltage power supply is low, the LED load branch circuit with the lamp voltage higher than the output voltage can be adjusted, and the current value of the current LED load branch circuit is equal to the preset current limit value by specifically adjusting the impedance of the first control tube of the current LED load branch circuit, so that the LED load branch circuit with the original high lamp voltage can normally work, the loss of the whole lighting system is reduced, and the efficiency of the lighting system is improved.
The embodiment of the present invention further provides a control device of an LED driving circuit for plant illumination, as shown in fig. 7, which is a schematic structural diagram of the control device of the LED driving circuit for plant illumination provided in the embodiment of the present invention; specifically, the control device is configured to control the LED driving circuit for plant illumination according to any one of the above embodiments; the device comprises:
a lamp voltage obtaining module 710, configured to obtain a lamp voltage corresponding to each LED load branch, where the lamp voltage is a total series voltage of each LED lamp in the LED load branch;
a determining module 720, configured to determine, according to the output voltage of the constant voltage power supply, a target lamp voltage meeting a first preset condition from all lamp voltages, and determine a target LED load branch corresponding to the target lamp voltage;
the first control module 730 is configured to control, based on the target LED load branch, conduction of a first control tube connected in parallel with the target LED load branch to obtain a current LED load branch after the first control tube is conducted, and determine a preset current limiting value of the current LED load branch;
a current signal obtaining module 740, configured to obtain a current signal of the current LED load branch;
and an adjusting module 750, configured to adjust the impedance of the first control tube according to the current signal and a preset current limiting value of the current LED load branch.
In the embodiment of this specification, still include:
the working state acquisition module is used for acquiring the working state of the first control tube;
the first judgment module is used for judging whether the working state of the first control tube meets a second preset condition or not;
and the current limiting value adjusting module is used for reducing the preset current limiting value of the current LED load branch circuit if the working state of the first control tube meets a second preset condition.
In an embodiment of this specification, the working state obtaining module includes:
the acquisition unit is used for acquiring the current lamp voltage of the current LED load branch where the first control tube is located;
and the determining unit is used for determining the working state of the first control tube in the current LED load branch circuit according to the current lamp voltage and the output voltage of the constant voltage power supply.
In the embodiment of this specification, still include:
the current value obtaining module is used for obtaining a preset current value of the LED load branch, and the preset current value is the lowest current value of the LED load branch;
the comparison module is used for comparing the current signal with the preset current value to obtain a first comparison result;
the second judgment module is used for judging whether the first comparison result meets a third preset condition or not;
and the second control module is used for controlling the conduction of the second control tube if the first comparison result meets a third preset condition.
In this embodiment, the adjusting module 750 includes:
the comparison unit is used for comparing the current signal with the preset current limiting value to obtain a second comparison result;
the judging unit is used for judging whether the second comparison result meets a fourth preset condition or not;
and the adjusting unit is used for adjusting the impedance of the first control tube if the second comparison result does not meet a fourth preset condition.
The embodiment of the invention provides a control terminal of an LED driving circuit for plant illumination, which comprises a processor and a memory, wherein at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded and executed by the processor to realize the control method of the LED driving circuit for plant illumination according to the method embodiment.
The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by operating the software programs and modules stored in the memory. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs needed by functions and the like; the storage data area may store data created according to use of the apparatus, and the like. Further, 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 the processor access to the memory.
Fig. 8 is a schematic structural diagram of a control terminal of an LED driving circuit for plant illumination according to an embodiment of the present invention, where the internal configuration of the control terminal of the LED driving circuit for plant illumination may include, but is not limited to: the processor, the network interface and the memory in the control terminal of the LED driving circuit for plant illumination may be connected by a bus or other means, and the bus connection is taken as an example in fig. 8 shown in the embodiments of the present specification.
The processor (or CPU) is a computing core and a control core of a control terminal of the LED driving circuit for plant illumination. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI, mobile communication interface, etc.). The Memory (Memory) is a Memory device in the control terminal of the LED driving circuit for plant illumination, and is used for storing programs and data. It is understood that the memory herein may be a high-speed RAM storage device, or may be a non-volatile storage device (non-volatile memory), such as at least one magnetic disk storage 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 LED driving circuit for plant lighting, which may include but is not limited to: windows system (an operating system), Linux (an operating system), etc., which are not limited thereto; also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. In this embodiment of the present specification, the processor loads and executes one or more instructions stored in the memory to implement the control method of the LED driving circuit for plant illumination provided in the above method embodiment.
Embodiments of the present invention also provide a computer-readable storage medium, which may be disposed in a control terminal of an LED driving circuit for plant lighting to store at least one instruction, at least one program, a code set, or a set of instructions related to implementing an LED driving circuit for plant lighting in the method embodiments, where the at least one instruction, the at least one program, the code set, or the set of instructions may be loaded and executed by a processor of an electronic device to implement the control method of the LED driving circuit for plant lighting provided in the above method embodiments.
Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may 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 may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device and server embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
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 instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A control method of an LED driving circuit for plant illumination is characterized in that: the LED driving circuit comprises a constant voltage power supply, at least two LED load branches and at least two first control tubes; the control method is used for controlling the LED drive circuit; the method comprises the following steps:
acquiring a lamp voltage corresponding to each LED load branch, wherein the lamp voltage is the total series voltage of each LED lamp in the LED load branches;
determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply, and determining a target LED load branch circuit corresponding to the target lamp voltage;
based on the target LED load branch, controlling a first control tube connected with the target LED load branch in parallel to be conducted to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
acquiring a current signal of the current LED load branch circuit;
and adjusting the impedance of the first control tube according to the current signal and a preset current limiting value of the current LED load branch.
2. The method for controlling the LED driving circuit for plant illumination according to claim 1, wherein: the adjusting the impedance of the first control tube further comprises:
acquiring the working state of the first control tube;
judging whether the working state of the first control tube meets a second preset condition or not;
and if so, reducing the preset current limiting value of the current LED load branch.
3. The control method of the LED driving circuit for plant illumination according to claim 2, wherein: the acquiring of the working state of the first control tube comprises:
acquiring the current lamp voltage of the current LED load branch where the first control tube is located;
and determining the working state of the first control tube in the current LED load branch circuit according to the current lamp voltage and the output voltage of the constant voltage power supply.
4. The control method of the LED driving circuit for plant illumination according to claim 2, wherein: after reducing the preset current limiting value of the current LED load branch, the method further includes:
acquiring a preset current value of the LED load branch, wherein the preset current value is the lowest current value of the LED load branch;
comparing the current signal with the preset current value to obtain a first comparison result;
judging whether the first comparison result meets a third preset condition or not;
if yes, the second control tube is controlled to be conducted.
5. The method for controlling the LED driving circuit for plant illumination according to claim 1, wherein: the adjusting the impedance of the first control tube according to the current signal and the preset current limiting value of the current LED load branch comprises:
comparing the current signal with the preset current limiting value to obtain a second comparison result;
judging whether the second comparison result meets a fourth preset condition or not;
if not, adjusting the impedance of the first control tube.
6. A control device of an LED drive circuit for plant illumination is characterized in that: the LED driving circuit comprises a constant voltage power supply, at least two LED load branches and at least two first control tubes; the control device is used for controlling the LED drive circuit; the device comprises:
the system comprises a lamp voltage acquisition module, a lamp voltage acquisition module and a control module, wherein the lamp voltage acquisition module is used for acquiring a lamp voltage corresponding to each LED load branch, and the lamp voltage is the total serial voltage of each LED lamp in the LED load branches;
the determining module is used for determining a target lamp voltage meeting a first preset condition from all lamp voltages according to the output voltage of the constant voltage power supply and determining a target LED load branch circuit corresponding to the target lamp voltage;
the first control module is used for controlling a first control tube connected with the target LED load branch in parallel to be conducted on the basis of the target LED load branch to obtain a current LED load branch after the first control tube is conducted, and determining a preset current limiting value of the current LED load branch;
the current signal acquisition module is used for acquiring a current signal of the current LED load branch circuit;
and the adjusting module is used for adjusting the impedance of the first control tube according to the current signal and the preset current limiting value of the current LED load branch.
7. A control terminal of an LED drive circuit for plant lighting, characterized in that: the terminal comprises a processor and a memory, wherein at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded by the processor and executed to realize the control method of the LED driving circuit for plant illumination according to any one of claims 1 to 5.
8. An LED drive circuit for plant lighting, characterized by: the LED constant-voltage power supply comprises a constant-voltage power supply, a control terminal, at least two LED load branches and at least two first control tubes;
each two paths of LED load branches are connected in parallel, and each path of LED load branch is connected with the output end of a constant voltage power supply;
the LED load branch comprises a current limiting module and at least two LED lamps, and each LED lamp is connected with the current limiting module in series;
each LED load branch is connected with the non-control end of at least one first control tube in parallel, wherein a circuit formed by the LED load branch and the first control tube in parallel comprises the current limiting module and at least one LED lamp;
and the control end of the first control tube is electrically connected with the control terminal.
9. The LED driving circuit for plant lighting according to claim 8, wherein: the control terminal comprises a main control unit and at least two switch control units;
the main control unit is electrically connected with each switch control unit respectively;
each switch control unit is electrically connected with the control end of the first control tube;
the switch control units correspond to the first control tubes one by one.
10. The LED driving circuit for plant lighting according to claim 8 or 9, wherein: the device also comprises at least two second control tubes;
each path of the LED load branch circuit is also connected with a non-control end of one second control tube in parallel, wherein a circuit formed by the LED load branch circuit and the second control tube in parallel comprises the current limiting module and at least two LED lamps;
and the control end of the second control tube is electrically connected with the control terminal.
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