An intelligent stepless dimming control system and control method thereof

Abstract

The present invention provides an intelligent stepless dimming control system and a control method thereof, comprising a remote control terminal, a cloud database, a control unit, a power supply unit and an execution unit, wherein the remote control terminal sends a dimming control command; the cloud database receives the dimming control command sent by the remote control terminal, and sends the received dimming control command to the control unit; the control unit receives the dimming control command sent by the cloud database, and controls the output voltage of the power supply unit; the power supply unit outputs a voltage corresponding to the dimming command according to the dimming command of the control unit; the execution unit comprises a plurality of lighting areas, each lighting area comprises a plurality of lighting beads, each lighting bead is provided with a dimming component, the dimming component comprises an MCU, which is used to read the steady-state voltage value of the current flowing to the lighting bead in real time, and judge whether to execute the dimming command, so as to realize the grouping, time-sharing and segmented intelligent dimming control of lighting fixtures.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting control, and in particular to an intelligent stepless dimming control system and a control method thereof. Background Art

[0002] Warehouses are usually very large and require a large number of lighting fixtures. There are two main lighting control solutions: one is to use a switch for unified control. Since workers work in a specific area most of the time, this solution causes a huge waste of electricity, especially for super-large warehouses. The other solution is to assign a switch to the lighting fixtures in a certain area. Although this method saves electricity, it is more troublesome to operate and cannot adjust the light intensity of the lighting fixtures.

[0003] The same problem also exists for road lighting systems, which can be either controlled by unified switches or by regional switches. However, both solutions are cumbersome to operate and cannot achieve dimming control of specific areas or specific lighting fixtures. Summary of the invention

[0004] The present invention discloses an intelligent stepless dimming control system and a control method thereof, which solves the problem that the traditional lighting control system is cumbersome to operate and cannot realize dimming control of specific areas or specific lighting lamps, and realizes intelligent dimming control of lighting fixtures in groups, time division and segments.

[0005] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0006] On the one hand, the present invention discloses an intelligent stepless dimming control system, including a remote control terminal, a cloud database, a control unit, a power supply unit and an execution unit, wherein the remote control terminal is used to send a dimming control command; the cloud database is used to receive the dimming control command sent by the remote control terminal, and send the received dimming control command to the control unit; the control unit is used to receive the dimming control command sent by the cloud database, and control the output voltage of the power supply unit according to the received dimming control command; the power supply unit is used to output a voltage corresponding to the dimming command according to the dimming command of the control unit; the execution unit includes a plurality of lighting areas, each of the lighting areas includes a plurality of lighting lamp beads, each of the lighting lamp beads is provided with a dimming component, and the dimming component includes an MCU, which is used to read the steady-state voltage value of the current flowing to the lighting lamp bead in real time, and determine whether to execute the dimming command.

[0007] Furthermore, the remote control terminal is a smart phone.

[0008] Furthermore, the control unit includes an MCU.

[0009] Furthermore, the power supply unit includes a plurality of working power supplies and a plurality of backup power supplies. When the working power supply is damaged, the backup power supply works.

[0010] Another aspect of the present invention discloses a control method of an intelligent stepless dimming control system, comprising the following steps:

[0011] In the steady state, the power module outputs the rated voltage U, and the MCU on all the lighting lamp beads detects the steady-state voltage value U1 of the current flowing to the lighting lamp beads;

[0012] When dimming operation is required, the remote control terminal sends a dimming command for a certain lighting area;

[0013] The cloud database receives the dimming command and sends the dimming command to the control unit;

[0014] The control unit receives the dimming command, and controls the power supply unit to output a preset reference voltage value U2 of the lighting area according to the received dimming command;

[0015] The MCUs on all the lighting lamp beads in the lighting area detect the steady-state voltage value U3 of the current flowing to the lighting lamp beads in real time, and record the duration t of the steady-state voltage value U3;

[0016] If the ratio of U3 and U1 of a certain lighting bead in the lighting area is equal to the ratio of U2 and U, the lighting bead in the area will perform dimming action according to the preset dimming ratio; if the ratios are not equal, the lighting bead will not perform dimming action.

[0017] Furthermore, the expression of the preset dimming ratio is:

[0018] b=t / T*p

[0019] Wherein, T is a preset reference time, and p is a dimming ratio corresponding to the preset reference time T.

[0020] Furthermore, when the MCU on the lighting lamp bead detects the steady-state voltage value of the current flowing to the lighting lamp bead, it detects several times and calculates the average value as the steady-state voltage value of the current flowing to the lighting lamp bead.

[0021] Beneficial technical effects:

[0022] 1. The present invention discloses an intelligent stepless dimming control system, comprising a remote control terminal, a cloud database, a control unit, a power supply unit and an execution unit, wherein the remote control terminal is used to send a dimming control command; the cloud database is used to receive the dimming control command sent by the remote control terminal, and send the received dimming control command to the control unit; the control unit is used to receive the dimming control command sent by the cloud database, and control the output voltage of the power supply unit according to the received dimming control command; the power supply unit is used to output a voltage corresponding to the dimming command according to the dimming command of the control unit; the execution unit includes a plurality of lighting areas, each of which includes a plurality of lighting beads, each of which is provided with a dimming component, and the dimming component includes an MCU, which is used to read the steady-state voltage value of the current flowing to the lighting bead in real time, and determine whether to execute the dimming command, thereby solving the problem that the traditional lighting control system is cumbersome to operate and cannot realize dimming control of a specific area or a specific lighting lamp, and realizing intelligent dimming control of lighting lamps in groups, time division and segmentation;

[0023] 2. In the present invention, when the MCU on the lighting lamp bead detects the steady-state voltage value of the current flowing to the lighting lamp bead, it detects several times and calculates the average value as the steady-state voltage value of the current flowing to the lighting lamp bead, so that the detected voltage value has higher accuracy;

[0024] 3. The intelligent dimming control system disclosed in the present invention can adjust the brightness of a certain area or a specific lighting fixture according to actual needs, thereby saving more electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0026] Figure 1 It is a structural schematic diagram of an intelligent stepless dimming control system according to the present invention;

[0027] Figure 2 A flowchart of the steps of a control method of an intelligent stepless dimming control system according to the present invention;

[0028] Figure 3 The figure is a simplified example of implementing dimming using the control method of an intelligent stepless dimming control system described in the present invention. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In order to solve the problem that the conventional lighting control system cannot realize the dimming control of a specific area or a specific lighting fixture, the present invention discloses an intelligent stepless dimming control system. Figure 1 The dimming control system includes a remote control terminal, a cloud database, a control unit, a power supply unit and an execution unit, wherein the remote control terminal is used to send dimming control commands. Preferably, the remote control terminal is a smart phone, or can be understood as an APP applet on a smart phone. Of course, there is no restriction on the specific form of the remote control terminal, as long as data transmission can be achieved; the cloud database is used to receive the dimming control command sent by the remote control terminal, and send the received dimming control command to the control unit. Preferably, the cloud database communicates with the control unit through a 4G or 5G network.

[0032] As an embodiment of the present invention, the control unit is used to receive a dimming control command sent by a cloud database, and control the output voltage of the power supply unit according to the received dimming control command. It should be noted that the control unit is a general term, that is, the control unit can be a controller or PLC including an MCU, and the control unit can also be integrated into a control cabinet, so there is no restriction on the specific implementation form of the control unit here; the power supply unit is used to output a voltage corresponding to the dimming command according to the dimming command of the control unit. Preferably, the power supply unit of the present invention includes several working power supplies and several backup power supplies. When the working power supply is damaged, the backup power supply is put into operation, which effectively improves the stability of the power supply unit; the execution unit includes several lighting areas, each lighting area includes several lighting lamp beads, each lighting lamp bead is provided with a dimming component, and the dimming component includes an MCU, which is used to read the steady-state voltage value of the current flowing to the lighting lamp bead in real time, and determine whether to execute the dimming command.

[0033] The dimming control system disclosed in the present invention can realize time-sharing and segmented dimming control for different areas or specific lighting fixtures.

[0034] Another aspect of the present invention discloses a control method of an intelligent stepless dimming control system, see Figure 2 , specifically including the following steps:

[0035] S1: In the stable state, the power module outputs the rated voltage U, and the MCU on all the lighting lamp beads detects the steady-state voltage value U1 of the current flowing to the lighting lamp beads;

[0036] In the embodiment, it is assumed that the rated voltage U output by the power module is 400V, three lighting areas A, B and C are set, and the preset reference voltage value of the lighting area in area A is 410V, the preset reference voltage value of the lighting area in area B is 420V, and the preset reference voltage value of the lighting area in area C is 430V. The three lighting areas include a number of lighting lamp beads. Due to the principle of line loss, when the bus voltage is 400V, the steady-state voltage value U1 of the current flowing to the lighting lamp bead detected by the MCU on each lighting lamp bead is less than 400V. Assuming that the rated voltage U output by the source module is 400V, the steady-state voltage value of the current flowing to the lighting lamp bead detected by the LED1 lamp bead in area C is 398V, the steady-state voltage value of the current flowing to the lighting lamp bead detected by the LED2 lamp bead is 396V, and the steady-state voltage value of the current flowing to the lighting lamp bead detected by the LED3 lamp bead is 395V.

[0037] S2: When dimming operation is required, the remote control terminal sends a dimming command for a certain lighting area;

[0038] Specifically, when it is necessary to dim the lighting area of ​​zone C, a control command for dimming the lighting area of ​​zone C is sent to the cloud database using the remote control terminal (APP applet).

[0039] S3: The cloud database receives the dimming command and sends the dimming command to the control unit;

[0040] The cloud database receives the control command for dimming the lighting area in zone C and sends the dimming control command to the control unit via the 4G network.

[0041] S4: The control unit receives the dimming command, and controls the power supply unit to output a preset reference voltage value U2 of the lighting area according to the received dimming command;

[0042] The control unit receives the control command for dimming the lighting area of ​​zone C, and controls the power supply unit to output a bus voltage of 430V according to a preset reference voltage value of 430V in zone C;

[0043] S5: The MCUs on all the lighting lamp beads in the lighting area detect the steady-state voltage value U3 of the current flowing to the lighting lamp beads in real time, and record the duration t of the steady-state voltage value U3 (it should be understood here that because the bus voltage has a stable process, that is, it takes a certain amount of time for the bus voltage to reach a stable state output, here only the time of the stable state needs to be calculated);

[0044] When the bus voltage is 430V, it is assumed that the LED1 lamp bead in the lighting area of ​​zone C detects that the steady-state voltage value of the current flowing to the lighting lamp bead is 428V, and records the duration of the steady-state voltage, assuming it is 50ms. The LED2 lamp bead detects that the steady-state voltage value of the current flowing to the lighting lamp bead is 424V, and records the duration of the steady-state voltage, assuming it is 30ms. The LED3 lamp bead detects that the steady-state voltage value of the current flowing to the lighting lamp bead is 423V, and records the duration of the steady-state voltage, assuming it is 35ms.

[0045] It is understandable that, in order to improve the accuracy of the read voltage value, multiple readings may be performed and an average value may be calculated as the steady-state voltage value.

[0046] It should be understood that the MCU output is a PWM wave. It takes a certain amount of time for the voltage to rise to a stable state, and it also takes a certain amount of time for the voltage to fall to a stable state. Therefore, the time for the voltage to rise and fall is not calculated, and only the duration of the voltage in a stable state is calculated.

[0047] S6: If the ratio of U3 and U1 of a certain lighting bead in the lighting area is equal to the ratio of U2 and U, the lighting bead in the area performs dimming action according to the preset dimming ratio; if the ratios are not equal, the lighting bead does not perform dimming action.

[0048] The various lighting beads in zone C are judged. First, the ratio of 430 to 400 is 1.075; the ratio of LED1 beads in the lighting area of ​​zone C is 428 to 398, which is also about 1.075. Therefore, the ratio of U3 to U1 of LED1 is equal to the ratio of U2 to U. Therefore, the LED1 bead is dimmed, and the specific dimming ratio is calculated according to the expression of the preset dimming ratio. Preferably, the expression of the preset dimming ratio is:

[0049] b=t / T*p

[0050] Among them, T is a preset reference time, and p is a dimming ratio corresponding to the preset reference time T. In the present embodiment, the reference time is set to 100ms, and the dimming ratio corresponding to the reference time 100ms is 100%. According to the dimming ratio calculation formula, the dimming ratio of LED1 lamp bead is calculated to be 50%; then the ratio of LED2 lamp bead is judged to be 424 / 396, and the calculated ratio result is 1.071. Therefore, the ratio of U3 and U1 of LED2 lamp bead is not equal to the ratio of U2 and U, so LED2 lamp bead does not perform dimming action; finally, the ratio of LED3 lamp bead is calculated to be 423 / 395, and the calculated ratio result is 1.070. Therefore, the ratio of U3 and U1 of LED3 lamp bead is not equal to the ratio of U2 and U, so LED3 lamp bead does not perform dimming action either.

[0051] In the present invention, dimming 25%-100% is divided into 75 stages for output control. What needs to be understood here is that the reference time T mainly depends on the time for the bus voltage to stabilize. Its value is related to each power supply design scheme and can be determined based on the required power supply design and the perceptual time acceptable to general users.

[0052] The intelligent dimming control system and control method disclosed in the present invention can realize time-sharing and segmented dimming control for different areas or specific lighting fixtures, save electric energy, and have broad application prospects.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent stepless dimming control system, characterized in that: include: Remote control terminal, used to send dimming control commands; A cloud database, used for receiving the dimming control command sent by the remote control terminal, and sending the received dimming control command to the control unit; A control unit, used to receive a dimming control command sent by the cloud database, and control the output voltage of the power supply unit according to the received dimming control command; A power supply unit, configured to output a voltage corresponding to a dimming command according to a dimming command of the control unit; An execution unit, wherein the execution unit includes a plurality of lighting areas, each of the lighting areas includes a plurality of lighting lamp beads, each of the lighting lamp beads is provided with a dimming component, and the dimming component includes an MCU for reading the steady-state voltage value of the current flowing to the lighting lamp bead in real time and determining whether to execute a dimming command; Determining whether to execute the dimming command includes the following steps: In the steady state, the power module outputs the rated voltage U, and the MCU on all the lighting lamp beads detects the steady-state voltage value U1 of the current flowing to the lighting lamp beads; When dimming operation is required, the remote control terminal sends a dimming command for a certain lighting area; The cloud database receives the dimming command and sends the dimming command to the control unit; The control unit receives the dimming command, and controls the power supply unit to output a preset reference voltage value U2 of the lighting area according to the received dimming command; The MCUs on all the lighting lamp beads in the lighting area detect the steady-state voltage value U3 of the current flowing to the lighting lamp beads in real time, and record the duration t of the steady-state voltage value U3; If the ratio of U3 and U1 of a certain lighting bead in the lighting area is equal to the ratio of U2 and U, the lighting bead in the area will perform dimming action according to the preset dimming ratio; if the ratios are not equal, the lighting bead will not perform dimming action.

2. The intelligent stepless dimming control system according to claim 1, characterized in that: The remote control terminal is a smart phone.

3. The intelligent stepless dimming control system according to claim 1, characterized in that: The control unit includes an MCU.

4. The intelligent stepless dimming control system according to claim 1, characterized in that: The power supply unit includes a plurality of working power supplies and a plurality of backup power supplies. When the working power supplies are damaged, the backup power supplies start to work.

5. The intelligent stepless dimming control system according to claim 1, characterized in that: The expression of the preset dimming ratio is: b=t / T*p Wherein, T is a preset reference time, and p is a dimming ratio corresponding to the preset reference time T.

6. The intelligent stepless dimming control system according to claim 1, characterized in that: When the MCU on the lighting lamp bead detects the steady-state voltage value of the current flowing to the lighting lamp bead, it detects several times and calculates the average value as the steady-state voltage value of the current flowing to the lighting lamp bead.

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