Lighting control system and lighting control method

Abstract

The application discloses a lighting control system, comprising: a master communication unit configured to receive a universal dimming value, the universal dimming value being a percentage value of brightness; a plurality of first terminal execution units in communication connection with the master communication unit, configured to obtain the universal dimming value and execute a first dimming logic according to the universal dimming value to drive a first lighting unit to work; a plurality of second terminal execution units in communication connection with the master communication unit, configured to obtain the same universal dimming value and execute a second dimming logic according to the universal dimming value to drive a second lighting unit to work; the second dimming logic being different from the first dimming logic; the lamp type of different lighting units being compatible, the control logic being decoupled, and the communication efficiency being optimized.

Description

Technical Field

[0001] This invention relates to the field of lighting control, and more particularly to a lighting control system and a lighting control method. Background Technology

[0002] With the advancement of intelligent urban lighting, street light upgrades often involve the mixed installation of high-pressure sodium lamps (gas discharge lamps) and LED lamps (solid-state lighting). Existing intelligent lighting control systems suffer from the following significant technical deficiencies in practical applications:

[0003] 1. Channel congestion and complex logic: Traditional systems differentiate lamp types through a main controller or cloud platform, requiring the encapsulation of differentiated instructions for different lamps. For example, sodium lamp instruction packets and LED instruction packets have different structures. In road sections with mixed lamp types, the main node needs to frequently switch instruction formats, resulting in high wireless channel occupancy, a high probability of data packet collisions, and complex upper-layer control logic.

[0004] 2. Safety hazards: Some systems use wireless modules to control the power supply circuit of lighting lamps. For example, a relay is connected in series in a single lamp circuit, and the wireless module controls the on and off of the relay. Once the wireless signal is interfered with or the module malfunctions, the lighting lamp may not be able to be turned off or may flicker abnormally, posing a safety hazard to electricity use.

[0005] 3. Risk of lamp damage: High-pressure sodium lamps have negative resistance characteristics, and deep dimming, such as dimming below 50%, can easily lead to arc extinguishing. Existing systems often use a uniform dimming curve, which cannot simultaneously accommodate the wide dimming range of 0-100% for LED lighting and the minimum dimming requirement of sodium lamps.

[0006] 4. Poor scalability: Adding a new type of lighting lamp usually requires refactoring the master node firmware and cloud database definition, which is costly and difficult to maintain. Summary of the Invention

[0007] One of the objectives of this invention is to provide a lighting control system to solve the technical problems of complex control logic and channel congestion caused by the mixed installation of multiple lamp types in the prior art.

[0008] To achieve one of the above-mentioned objectives, one embodiment of the present invention provides a lighting control system, comprising: The main communication unit is configured to receive a general dimming value, wherein the general dimming value is a brightness percentage value; A plurality of first terminal execution units are communicatively connected to the main communication unit and configured to acquire the general dimming value and execute first dimming logic according to the general dimming value to drive the first lighting unit to work; A plurality of second terminal execution units are communicatively connected to the main communication unit and configured to acquire the same general dimming value and execute a second dimming logic according to the general dimming value to drive the second lighting unit to work; the second dimming logic is different from the first dimming logic.

[0009] As a further improvement of one embodiment of the present invention, the main communication unit includes a mobile communication module, a first wireless radio frequency module, and a first main control chip, wherein the first main control chip is connected to the mobile communication module and the first wireless radio frequency module; the mobile communication module receives the general dimming value. The first main control chip is configured not to perform lamp type identification or differentiation processing on the general dimming value, but to transmit the same general dimming value to the first wireless radio frequency module; The first wireless radio frequency module encapsulates the universal dimming value into a unified wireless dimming frame and broadcasts it; the wireless dimming frame does not include a lamp type identification field.

[0010] As a further improvement of one embodiment of the present invention, the first terminal execution unit includes a second wireless radio frequency module and a first chip. The second wireless radio frequency module is configured to communicate with the first wireless radio frequency module, receive and parse the wireless dimming frame, and obtain a general dimming value. The first chip is connected to the second wireless radio frequency module. The first chip has the first dimming logic and executes the first dimming logic, thereby configuring it to: determine whether the general dimming value is less than or equal to a preset safety threshold. If so, generate a first dimming signal based on the safety threshold. If not, generate a first dimming signal based on the general dimming value to drive the first lighting unit.

[0011] As a further improvement of one embodiment of the present invention, the second terminal execution unit includes a second wireless radio frequency module and a second chip. The second wireless radio frequency module is configured to communicate with the first wireless radio frequency module, receive and parse the wireless dimming frame, and obtain a general dimming value. The second chip is connected to the second wireless radio frequency module. The second chip has the second dimming logic and executes the second dimming logic, thereby configuring it to output a second dimming signal according to the general dimming value to drive the second lighting unit.

[0012] As a further improvement of one embodiment of the present invention, the first terminal execution unit and the second terminal execution unit each include a second wireless radio frequency module, the communication parameters of the second wireless radio frequency module are preset to be consistent with the communication parameters of the first wireless radio frequency module; the second wireless radio frequency module is configured to directly receive and parse the wireless dimming frame from the first wireless radio frequency module.

[0013] As a further improvement of one embodiment of the present invention, it includes a centralized controller and a switch, wherein the connection between the centralized controller and the switch is independent of the communication connection between the main communication unit and the first terminal execution unit, and also independent of the communication connection between the main communication unit and the second terminal execution unit. The output terminal of the centralized controller is connected to the switch, and the main contacts of the switch are connected in series in the power supply circuits of a plurality of the first lighting units and the second lighting units.

[0014] As a further improvement of one embodiment of the present invention, the centralized controller includes a mobile communication unit, a local storage unit, and a relay control module. The mobile communication unit and the local storage unit are respectively connected to the relay control module. The relay control module is connected to the switch and controls the on / off state of the switch. The mobile communication unit is configured to receive switching commands from the platform. The local storage unit stores lighting timer switching logic. The centralized controller is configured to control the on / off state of the switch when it receives the switch command or triggers the lighting timer switch logic.

[0015] To achieve one of the above-mentioned objectives, one embodiment of the present invention provides a lighting control method, comprising the steps of: The main communication unit receives and transmits a general dimming value, wherein the general dimming value is a brightness percentage value. A plurality of first terminal execution units acquire the general dimming value and execute first dimming logic according to the general dimming value to drive the first lighting unit to work; Several second terminal execution units acquire the same general dimming value and execute a second dimming logic according to the general dimming value to drive the second lighting unit to work; the first dimming logic is different from the second dimming logic.

[0016] As a further improvement of one embodiment of the present invention, the first terminal execution unit executes the first dimming logic according to the general dimming value, specifically including: Determine whether the general dimming value is less than or equal to a preset safety threshold. If yes, generate the first dimming signal based on the safety threshold; otherwise, generate the first dimming signal based on the general dimming value.

[0017] As a further improvement of one embodiment of the present invention, the second terminal execution unit executes the second dimming logic according to the general dimming value, specifically including: outputting a second dimming signal according to the general dimming value.

[0018] As a further improvement of one embodiment of the present invention, when the centralized controller receives a switch command from the platform or triggers the lighting timer switch logic stored locally, it controls the on / off state of the first and second lighting lamps; the centralized controller is independent of the communication connection between the main communication unit and the first terminal execution unit, and is also independent of the communication connection between the main communication unit and the second terminal execution unit.

[0019] Compared with existing technologies, this invention provides a lighting control system in which the first and second terminal execution units receive the same universal dimming value and autonomously adapt and execute according to their respective built-in first and second dimming logics to drive the dimming of the first and second lighting units respectively, thus being compatible with different lighting units. The control logic is decoupled, and in the context of being compatible with different lighting units, the lamp type adaptation rules of the lighting units are pushed down to the terminal execution units. The main communication unit only receives and sends the universal dimming value, avoiding the maintenance of a complex lamp type database and frequent switching of instruction formats. Communication efficiency is optimized because the universal dimming value sent by the main communication unit does not distinguish between lamp types, and the instruction length is fixed and uniform, reducing message overhead by more than 30%, reducing channel congestion rate, avoiding instruction conflicts, and improving instruction arrival rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a lighting control system according to one embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of a main communication unit, a first terminal execution unit, and a second terminal execution unit in one embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of a centralized controller according to one embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the power supply path for powering a lighting control system according to one embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of a lighting control method according to an embodiment of the present invention. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0026] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," "third," "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The terms “connection,” “connected to,” or any other variations are intended to encompass various relative positions where a connection exists, including both direct and indirect connections. A direct connection can be formed through a pneumatic conduit, while an indirect connection can be formed through devices such as valves or sensors, through pneumatic components such as brake control units, or through any other medium such as air.

[0028] Please see Figure 1 This is a schematic diagram of a lighting control system 100 according to an embodiment of the present invention. The lighting control system 100 includes: The main communication unit 10 is configured to receive a general dimming value, which is a brightness percentage value. A plurality of first terminal execution units 30 are communicatively connected to the main communication unit 10 and configured to acquire a general dimming value and execute a first dimming logic according to the general dimming value to drive the first lighting unit 20 to work. Several second terminal execution units 50 are communicatively connected to the main communication unit 10 and configured to acquire the same general dimming value and execute second dimming logic according to the general dimming value to drive the second lighting unit 40 to work; the second dimming logic is different from the first dimming logic.

[0029] The first and second terminal execution units 30 and 50 receive the same universal dimming value and autonomously adapt and execute according to their respective built-in first and second dimming logics to drive the dimming of the first and second lighting units 20 and 40 respectively, thus being compatible with different lighting units. The control logic is decoupled. Under the background of being compatible with different lighting units, the lamp type adaptation rules of the lighting units are pushed down to the terminal execution units. The main communication unit 10 only receives and sends the universal dimming value, avoiding the maintenance of a complex lamp type database and frequent switching of instruction formats. Communication efficiency is optimized. Since the universal dimming value sent by the main communication unit 10 does not distinguish between lamp types, the instruction length is fixed and uniform, the message overhead is reduced, the channel congestion rate is reduced, the instruction conflict is avoided, and the instruction arrival rate is improved.

[0030] The lighting control system 100 includes a platform terminal 60 and a network server 70. The platform terminal 60 and the network server 70 are connected in communication, and the network server 70 is connected in communication with the main communication unit 10. The platform terminal 60 generates and sends a universal dimming value.

[0031] Specifically, the platform 60 is a centralized management platform, whose hardware architecture includes an application server, a database server, and a web server. The platform 60 provides a human-machine interface for administrators to configure dimming strategies and translate these strategies into dimming commands containing a universal dimming value. The universal dimming value is defined as a dimensionless percentage value ranging from 0% to 100%, used to characterize the ratio of the target brightness to the maximum brightness; its specific value is not associated with any lamp type information.

[0032] The platform's database server has a variety of dimming presets, such as weekday mode, holiday mode, and nighttime energy-saving mode. It can dynamically select and generate corresponding dimming instructions based on the schedule, light sensor data, or manual commands.

[0033] Specifically, the network server 70 is a dedicated server for the Internet of Things, deployed in the operator's network or cloud platform, and connected to the platform 60 through an internal high-speed network.

[0034] The network server 70 maintains the list of devices and communication status of the online main communication unit 10. It can also receive online status, execution feedback and other information uploaded by the main communication unit 10 and forward it to the platform 60 for recording and display.

[0035] The network server 70 receives the general dimming value sent by the platform 60, encapsulates it into a data packet conforming to the 4G / 5G IoT communication protocol, and routes it to the target main communication unit 10 through the mobile communication network. During this process, the network server 70 does not perform any parsing or modification of the general dimming value, but only serves as a data transmission channel.

[0036] The main communication unit 10 includes a mobile communication module 11, a first wireless radio frequency module 13, and a first main control chip 12. The first main control chip 12 is connected to the mobile communication module 11 and the first wireless radio frequency module 13. The mobile communication module 11 receives a general dimming value. The first main control chip 12 is configured not to perform lamp type identification or differentiation processing on the general dimming value, but to transmit the same general dimming value to the first wireless radio frequency module 13; The first wireless radio frequency module 13 encapsulates the universal dimming value into a unified wireless dimming frame and broadcasts it; the wireless dimming frame does not include the lamp type identification field.

[0037] In one specific embodiment, combined with Figure 2As shown, the mobile communication module 11 uses a 4G / 5G communication module to establish a remote wireless connection with the network server 70. The mobile communication module 11 is configured to receive control commands containing general dimming values ​​issued by the network server 70, and transmit the command data to the first main control chip 12 through a standard serial communication interface.

[0038] The first main control chip 12 is electrically connected to the mobile communication module 11 and the first wireless radio frequency module 13, respectively, to coordinate their data interaction. The first main control chip 12 is configured to, upon receiving a general dimming value, not perform any parsing, format conversion, or differentiation processing on the value, but simply store it temporarily in an internal buffer as data to be forwarded, and trigger the first wireless radio frequency module 13 to enter the transmission state.

[0039] The first main control chip 12 is configured not to perform lamp type identification or differentiated processing on the general dimming value. This means that the first main control chip 12 does not store a lamp type database, and does not distinguish between lamp types or classify the general dimming value. For example, it does not need to identify sodium lamps and general dimming value 50, or LED lamps and general dimming value 40. Instead, it only accepts the general dimming value, such as 40, and then transmits the general dimming value 40 to the first wireless radio frequency module 13 without discrimination. More specifically, the instructions issued by the platform 60 do not distinguish between lamp types, but are uniform general dimming values ​​that are applicable to all lamp types that are compatible with lighting control systems such as sodium lamps and LED lamps.

[0040] In one specific embodiment, the first wireless radio frequency module 13 is a LoRa radio frequency transceiver unit, configured to encapsulate the received general dimming value into a unified wireless dimming frame according to a predefined frame structure. After completing the frame structure encapsulation, the digital baseband signal is modulated into a LoRa radio frequency signal and broadcast outward through the antenna.

[0041] The aforementioned wireless dimming frame is a fixed-length data packet, containing at least the following fields: frame header, group address (used to address a specific terminal execution unit), general dimming value field (value range 0-100, corresponding to 0%-100% brightness), and checksum. It should be noted that the frame structure of this wireless dimming frame does not contain any fields for identifying the lamp type. The same general dimming value is broadcast to all first and second terminal execution units 30 and 50 in the exact same data format. Thus, the main communication unit 10 does not need to maintain a large lamp type database, and the wireless dimming frame length is fixed and uniform, reducing message overhead by more than 30%.

[0042] Traditional lighting control systems require the platform terminal 60 to send commands that include both general dimming values ​​and lamp types. The wireless dimming frames also need to include fields to distinguish lamp types. During LoRa network wireless communication, the LoRa channel occupancy rate reaches 65%. In contrast, the commands sent by the platform terminal 60 in this application only include general dimming values. This shortens the commands and the wireless dimming frame length, reducing the LoRa channel occupancy rate to below 30%, significantly reducing congestion and improving command delivery rates in large-scale networking.

[0043] The first terminal execution unit 30 includes a second wireless radio frequency module 31 and a first chip 32. The second wireless radio frequency module 31 is configured to communicate with the first wireless radio frequency module 13, receive and parse the wireless dimming frame, and obtain a general dimming value. The first chip 32 is connected to the second wireless radio frequency module 31. The first chip 32 is provided with a first dimming logic and executes the first dimming logic, thereby configuring it to: determine whether the general dimming value is less than or equal to a preset safety threshold. If so, generate a first dimming signal based on the safety threshold. If not, generate a first dimming signal based on the general dimming value to drive the first lighting unit 20.

[0044] In one specific embodiment, combined with Figure 2 , 5 As shown, the second wireless radio frequency module 31 is a LoRa radio frequency receiver unit, and its hardware configuration matches that of the first wireless radio frequency module 13 of the main communication unit 10. The second wireless radio frequency module 31 is configured to establish a wireless communication connection with the first wireless radio frequency module 13. After capturing the wireless dimming frame broadcast by the main communication unit 10, it performs radio frequency demodulation, synchronous acquisition, and data parsing to obtain the general dimming value (e.g., an integer from 0 to 100) and transmits the parsed general dimming value to the first chip 32.

[0045] Understandably, when the second wireless radio frequency module 31 parses the wireless dimming frame, it saves parsing time because it does not need to parse the lamp type. In traditional lighting control systems, the average delay time between sending a command containing a general dimming value from the platform 60 and the execution of the command by the terminal execution unit is more than 4 seconds. In this application, the average command delay is reduced to less than 1.5 seconds, significantly improving the command arrival time.

[0046] The first chip 32 is electrically connected to the second wireless radio frequency module 31, and is used to receive a general dimming value and execute a pre-stored first dimming logic. In one specific embodiment, the first dimming logic is embedded in the non-volatile memory of the first chip 32. The first dimming logic is burned into the first chip 32 in the form of firmware, or the first dimming logic is embedded in a dedicated logic circuit. In short, the first dimming logic cannot be modified by external instructions, specifically, it cannot be modified by instructions issued by the platform terminal 60 or the main control unit 10.

[0047] The first dimming logic is a threshold protection logic and a preset safety threshold T is used; the first lighting unit 20 includes a gas discharge lamp with negative resistance characteristics, such as a sodium lamp.

[0048] The preset safety threshold T corresponds to the minimum power threshold required for a gas discharge lamp to maintain arc stability. For example, in a high-pressure sodium lamp, to prevent arc extinction, the preset safety threshold T is typically 40%-50% of its rated power. In one specific embodiment, the safety threshold T for a sodium lamp is set to 50% brightness. The value of the safety threshold T is determined by programming the corresponding gas discharge lamp before it leaves the factory based on its physical characteristics, ensuring that the gas discharge lamp will not operate below the arc extinction threshold under any circumstances, thus extending the lamp's lifespan.

[0049] In traditional lighting control systems, gas discharge lamps, such as high-pressure sodium lamps, are prone to arc extinction when dimmed to deep dimming levels, especially when the brightness drops below 50%. Frequent start-stop cycles of the lighting fixtures severely shorten their lifespan. In existing technologies, the damage rate of sodium lamps during deep dimming reaches 12%. However, in this application, with the built-in threshold protection logic in the first terminal execution unit 30, the damage rate of sodium lamps during deep dimming is reduced to 0, completely eliminating damage caused by deep dimming.

[0050] The first chip 32 specifically performs the following: reads the received general dimming value V. in And compare it with the preset safety threshold T. If the general dimming value V in If the value is less than or equal to the safety threshold T, the first chip 32 will force the output target value V to be less than or equal to the safety threshold T. out Set to the safety threshold T; if the general dimming value V in If the value is greater than the safety threshold T, the first chip 32 maintains the output target value V. out Universal dimming value V in The first chip 32 outputs the final target value V. out Generate the first dimming signal.

[0051] The lighting control system 100 includes a first driving circuit 33. In one specific embodiment, the first driving circuit 33 is connected to a first chip 32 and a first lighting unit 20. The first driving circuit 33 generates a corresponding pulse width modulation signal according to a first dimming signal to control the lamp output of the first lighting unit 20 to a corresponding brightness value.

[0052] Specifically, when the first terminal execution unit 30 receives the general dimming value V in The value equals 40, and the first terminal execution unit 30 forcibly executes the output target value V. out The duty cycle of the PWM corresponding to the first dimming signal is set to 50%, and the first driving circuit 33 controls the lamp output of the first lighting unit 20 to correspond to 50% brightness.

[0053] When the first terminal execution unit 30 receives the general dimming value V in When the value equals 70, the first terminal execution unit 30 executes and outputs the target value V. out The duty cycle of the PWM corresponding to the first dimming signal is set to 70%, and the first driving circuit controls the lamp output of the first lighting unit 20 to correspond to 70% brightness.

[0054] As can be seen from the above, the first dimming logic is stored in the internal memory of the first chip 32, and its execution process is independent of the main communication unit 10 and the platform terminal 60. Even if the platform terminal issues a dimming command of less than 50%, the first chip 32 can still execute the safety threshold output, thereby physically preventing the gas discharge lamp from being damaged by arc extinction due to misoperation dimming.

[0055] In one specific embodiment, the lighting control system 100 includes a sodium lamp electronic ballast, and a first terminal execution unit 30 is disposed on the sodium lamp electronic ballast. The sodium lamp electronic ballast is electrically connected to the sodium lamp, and the sodium lamp electronic ballast receives wireless dimming commands and drives the sodium lamp to work.

[0056] The second terminal execution unit 50 includes a second wireless radio frequency module 51 and a second chip 52. The second wireless radio frequency module 51 is configured to communicate with the first wireless radio frequency module 13, receive and parse wireless dimming frames, and obtain general dimming values. The second chip is connected to the second wireless radio frequency module. The second chip has a second dimming logic and executes the second dimming logic, thereby configuring it to output a second dimming signal according to a general dimming value to drive the second lighting unit.

[0057] The first terminal execution unit 30 and the second terminal execution unit 50 each include a second wireless radio frequency module 31 and 51. The communication parameters of the second wireless radio frequency modules 31 and 51 are preset to be consistent with the communication parameters of the first wireless radio frequency module 13. The second wireless radio frequency modules 31 and 51 are configured to directly receive and parse wireless dimming frames from the first wireless radio frequency module 13. Specifically, the second wireless radio frequency modules 31 and 51 are configured to directly parse wireless dimming frames without device registration or type negotiation, achieving a configuration-free, plug-and-play effect for both the first and second terminal execution units 30 and 50. In other embodiments, when the lighting control system 100 is equipped with more other terminal execution units, they can also be configured with the same communication parameters as the first wireless radio frequency module 13, achieving plug-and-play functionality, convenient installation, and reduced modification costs.

[0058] In one specific embodiment, combined with Figure 2 , 5As shown, the second wireless radio frequency module 51 is a LoRa radio frequency receiver unit, whose hardware configuration matches that of the first wireless radio frequency module 13 and is basically the same as that of the second wireless radio frequency module 31. More specifically, the communication parameters of the second wireless radio frequency module 51, including the operating frequency band, spreading factor, bandwidth, synchronization word, etc., are consistent with the communication parameters of the first wireless radio frequency module 13 and the second wireless radio frequency module 31, ensuring that the first and second terminal execution units can receive the same wireless dimming frame without difference, without the need for additional handshake configuration.

[0059] The second wireless radio frequency module 51 is configured to establish a wireless communication connection with the first wireless radio frequency module 13. After capturing the wireless dimming frame broadcast by the main communication unit 10, it performs radio frequency demodulation, synchronous capture and data parsing to obtain the general dimming value (e.g., integer 0-100) and transmits the parsed general dimming value to the second chip 52.

[0060] The second chip 52 is electrically connected to the second wireless radio frequency module 51 and is used to receive a general dimming value and execute a pre-stored second dimming logic. The second dimming logic is embedded in the non-volatile memory of the second chip 52. The second dimming logic is burned into the second chip 52 in the form of firmware. Alternatively, the first dimming logic is embedded in a dedicated logic circuit. Similarly, the second dimming logic cannot be modified by external instructions.

[0061] The second dimming logic differs fundamentally from the first dimming logic. The second dimming logic is a linear mapping logic; the second lighting unit includes solid-state lighting, such as LED lights.

[0062] The second chip 52 specifically executes the task of reading the received general dimming value V. in It is directly used as the output target value V out No threshold judgment or numerical correction is performed. That is, the target value V is output. out Equal to universal dimming value V in The second chip 52 outputs the target value V. out Generate a second dimming signal.

[0063] The lighting control system 100 includes a second driving circuit 53. In one specific embodiment, the second driving circuit 53 is connected to a second chip 52 and a second lighting unit 40. The second driving circuit generates a corresponding pulse width modulation signal according to the second dimming signal, and drives the lamp of the second lighting unit 40 to output a corresponding brightness value.

[0064] Specifically, when the second terminal execution unit 50 receives the general dimming value V in The value equals 40, and the second terminal execution unit 50 executes to output the target value V. outThe duty cycle of the second dimming signal is set to 40%. At this time, the PWM duty cycle corresponding to the second dimming signal is set to 40%, and the second driving circuit 53 controls the lamp output of the second lighting unit 40 to correspond to 40% brightness.

[0065] In one specific embodiment, the lighting control system 100 includes an LED dimming power supply, a second terminal execution unit 50 is disposed on the LED dimming power supply, the LED dimming power supply and the LED lamp are electrically connected, and the LED dimming power supply receives wireless dimming commands and drives the LED lamp to work.

[0066] As can be seen from the above, the second dimming logic is also embedded in the internal memory of the second chip 52, and its execution process is independent of the main communication unit 10 and the platform terminal 60. Unlike the first dimming logic, the second dimming logic adopts linear mapping, giving full play to the physical characteristics of solid-state lighting lamps that can dim over a wide range (0%-100%), while maintaining the extreme simplicity of the control algorithm.

[0067] The first terminal execution unit 30 has built-in threshold protection logic, which forcibly raises the brightness of commands below 50% to ensure that the gas discharge lamp does not enter the arc-extinguishing zone. The second terminal execution unit 50 has built-in linear mapping logic, which provides a linear response to commands in the full range of 0%-100%, making full use of the dimming capability of solid-state lighting.

[0068] The first terminal execution unit 30 and the second terminal execution unit 50 respond differently to the same universal dimming value. For example, if the universal dimming value is 40, the first terminal execution unit 30 outputs a 50% first dimming signal, while the second terminal execution unit 50 outputs a 40% second dimming signal. These differentiated dimming signals are determined by their respective internally fixed dimming logic, and the main communication unit 10 and the platform terminal 60 are unaware of this, thus achieving the technical effect of adaptive execution for different lamp types under the same command.

[0069] The lighting control system 100 is also compatible with more types of lamps. Understandably, adding a new type of lamp or a new lighting unit only requires replacing or upgrading the chip of the corresponding terminal execution unit, such as burning new rules to update or replace the dimming logic. The main communication unit 10 and the platform 60 do not need any changes, achieving extremely simple expansion and maintenance, reducing the transformation cost by more than 80%, and making operation and maintenance less difficult.

[0070] Specifically, the lighting control system 100 includes other terminal execution units 30' and other lighting units 20', wherein the other lighting units 20' can be metal halide lamps, fluorescent lamps, etc. The other terminal execution units 30' are matched with their respective lamp types and set dimming logic corresponding to their respective lamp types, so that each other terminal execution unit 30' can adaptively perform dimming actions when receiving the same general dimming value instruction from the main communication unit 10.

[0071] The lighting control system 100 includes a central controller 80 and a switch 90. The connection between the central controller 80 and the switch 90 is independent of the communication connection between the main communication unit 10 and the first terminal execution unit 30, and also independent of the communication connection between the main communication unit 10 and the second terminal execution unit 50. The output terminal of the central controller 80 is connected to the switch 90. The main contacts of the switch 90 are connected in series in the power supply circuits of several first lighting units 20 and second lighting units 40. This constructs an independent physical power-off mechanism, which is not affected by the wireless communication connection and reduces potential electrical safety hazards.

[0072] Combination Figure 1 As shown, the centralized controller 80 and the switch 90 form an independent physical control path, which does not rely on the wireless link and is physically independent of the wireless communication links between the main communication unit 10 and the first terminal execution unit 30, and between the main communication unit 10 and the second terminal execution unit 50.

[0073] Specifically, the central controller 80 is installed in the distribution box, and the switch 90 is an AC contactor, which includes a coil terminal and several main contacts. The output terminal of the central controller 80 is electrically connected to the coil terminal of the switch 90, and the main contacts of the switch 90 are connected in series in the main power supply circuit of the lighting fixtures. The central controller 80 can drive the switch 90 to switch on and off, thereby controlling the physical on / off of the power supply circuits of all first lighting units 20 and second lighting units 40.

[0074] Switch 90 is an AC contactor with a rated current of not less than 100A, ensuring that it can reliably cut off the total load current of all first and second lighting units.

[0075] When the switch 90 creates a physical break in the power supply circuit, regardless of whether the main communication unit 10 is sending a dimming command, or the operating state of the first terminal execution unit 30 and the second terminal execution unit 50, all first lighting units 20 and second lighting units 40 will be forcibly turned off due to the loss of power supply. As a physical break, the switch 90, based on circuit principles, inherently prioritizes the power-off path over any wireless dimming command. This is because the execution of a dimming command requires power to both the first lighting units 20 and the second lighting units 40, and the switch 90 directly cuts off the power input, providing the lighting control system 100 with the highest level of safety as a fallback.

[0076] The centralized controller 80 includes a mobile communication unit 81, a local storage unit 82, and a relay control module 83. The mobile communication unit 81 and the local storage unit 82 are respectively connected to the relay control module 83. The relay control module 83 is connected to the switch 90 and controls the on / off state of the switch 90. The mobile communication unit 81 is configured to receive switching commands from the platform terminal 60. The local storage unit 82 stores lighting timer switching logic. The centralized controller 80 is configured to control the on / off state of the switch 90 when it receives a switching command or triggers the lighting timer switching logic.

[0077] In one specific embodiment, combined with Figure 3 As shown, the mobile communication unit 81 is a 4G / 5G industrial-grade communication module that establishes a remote wireless connection with the network server 70 to receive power-on / off commands issued by the platform 60.

[0078] The local storage unit 82 is a non-volatile memory that pre-stores lighting timer switching logic, such as cutting off power from 23:00 to 5:00 the next day, and special modes for holidays, to ensure that even if the network between the central controller 80 and the platform 60 is interrupted, the central controller 80 can still operate independently according to the preset rules.

[0079] The centralized controller 80 includes a control chip 84, which is electrically connected to the mobile communication unit 81, the local storage unit 82, and the relay control module 83.

[0080] The relay control module 83 includes at least one set of relays. The coil terminals of the relays are controlled by the control chip 84, and their contact terminals are led out to the output terminal of the centralized controller 80 and electrically connected to the coil terminal of the switch 90.

[0081] Specifically, when the platform 60 issues a power-off command, the network server 70 receives and forwards the power-off command, the mobile communication unit 81 receives the power-off command, the control chip 84 parses the command and drives the relay control module 83 to act, such as disconnecting the relay contacts, the electromagnetic coil of the switch 90 loses power, the main contacts break, causing the main power supply circuit for lighting to be cut off, and all lamps go out due to the power outage.

[0082] Specifically, the control chip 84 continuously compares the current time with the lighting timer switch information in the local storage unit 82, such as setting the power supply to be cut off from 23:00 to 5:00 the next day. When the time reaches the preset power-off point of 23:00 every day, the control chip 84 automatically triggers the relay control module 83 to operate, the switch 90 to turn off the power, and all lights to turn off the power.

[0083] In one specific embodiment, the main communication unit 10 communicates with the first and second terminal execution units 30 and 50 via a LoRa network. It is understood that if the LoRa network fails, the main communication unit 10 will be unable to send any commands, or if the main communication unit 10 or the first and second terminal execution units 30 and 50 malfunction, in any of these abnormal scenarios, it will not affect the central controller 80's ability to receive power-off commands from the platform 60. The central controller 80 can still control the switch 90 to cut off the power, turning off all lights; or, the central controller 80 may trigger the locally stored lighting timer switch logic to perform a power-off within a preset time period, turning off all lights.

[0084] In a specific embodiment, combined with Figure 4 As shown, the power supply circuit of the lighting control system 100 includes a weak power supply path to provide power to the central controller 80. Specifically, the mains input terminal 200 is electrically connected to the central controller 80, and a circuit breaker 400 is provided between the mains input terminal 200 and the central controller 80 to provide overload and short-circuit protection. The central controller 80 includes a DC 24V switching power supply, which converts 220V AC power to 24V DC power. The output terminal of the central controller 80 is connected to the first and second lighting units 20 and 40, and a switch 90 is located between the central controller 80 and the first and second lighting units 20 and 40, forming a weak power supply circuit from the mains input terminal 200 to the first and second lighting units 20 and 40.

[0085] Combination Figure 4 As shown, the power supply circuit of the lighting control system 100 also includes a high-voltage power supply path to provide power to all the first and second lighting units 20 and 40. Specifically, the mains input terminal 200 is connected to the circuit breaker 400, which has overload and short-circuit protection functions. The output terminal of the circuit breaker 400 is connected to the switch 90. The main contacts of the switch 90 are electrically connected to the main power supply line, and the branches of the main power supply line are connected to each of the first lighting unit 20 and the second lighting unit 40.

[0086] The aforementioned weak power supply path and strong power supply path converge at switch 90. When the central controller 80 triggers switch 90 to open, switch 90 forms a physical break point, cutting off the power input of all first and second lighting units 20 and 40. No dimming command can bypass the physical break point to turn on the lamps or even dim them.

[0087] This application also includes a lighting control method applicable to the lighting control system 100 in any of the above-described technical solutions, combined with... Figure 5 As shown, the lighting control method includes the following steps: S1: The main communication unit 10 receives and transmits a general dimming value, which is a brightness percentage value. S2: Several first terminal execution units 30 acquire a general dimming value and execute a first dimming logic according to the general dimming value to drive the first lighting unit 20 to work; S3: Several second terminal execution units obtain the same general dimming value and execute the second dimming logic according to the general dimming value to drive the second lighting unit 40 to work; the first dimming logic is different from the second dimming logic; it can be understood that steps S2 and S3 should be executed synchronously; the lighting control method of the above lighting control system 100 is compatible with different lighting units, decouples control logic, optimizes communication efficiency, and is easy to expand and maintain.

[0088] The main communication unit 10 includes a mobile communication module 11, a first wireless radio frequency module 13, and a first main control chip 12, with the first main control chip 12 connected to the mobile communication module 11 and the first wireless radio frequency module 13.

[0089] The main communication unit 10 receives and transmits a universal dimming value, meaning that the mobile communication module 11 receives the universal dimming value from the network server 70, and the first wireless radio frequency module 13 encapsulates the universal dimming value into a unified wireless dimming frame and broadcasts it.

[0090] The first terminal execution unit 30 executes the first dimming logic according to the general dimming value, specifically including: Determine whether the general dimming value is less than or equal to the preset safety threshold T. If yes, generate a first dimming signal based on the safety threshold T. If no, generate a first dimming signal based on the general dimming value. The first dimming logic is a threshold protection logic to extend the lifespan of the first lighting unit 20.

[0091] Specifically, the first terminal execution unit 30 includes a first chip 32 and a second wireless radio frequency module 31. The first chip 32 and the second wireless radio frequency module 31 are electrically connected, and the second wireless radio frequency module 31 is communicatively connected to the first wireless radio frequency module 31. It receives wireless dimming frames and parses out a general dimming value. The first chip 32 receives the general dimming value and executes the first dimming logic.

[0092] The second terminal execution unit 50 executes the second dimming logic according to the general dimming value, specifically including: outputting the second dimming signal according to the general dimming value; wherein, the second dimming logic is a linear mapping logic, which effectively utilizes the wide-range dimming of the second lighting unit 40.

[0093] Specifically, the second terminal execution unit 50 includes a second chip 52 and a second wireless radio frequency module 51. The second chip 52 and the second wireless radio frequency module 51 are electrically connected. The second wireless radio frequency module 51 is communicatively connected to the first wireless radio frequency module 13, and both receive the same wireless dimming frame and parse out the same universal dimming value. The second chip 52 receives the universal dimming value and executes the pre-stored second dimming logic.

[0094] The lighting control method also includes the following steps: when the centralized controller 80 receives a switch command from the platform terminal 60 or triggers the lighting timer switch logic stored locally, it controls the first lighting unit 20 and the second lighting unit 40 to switch on and off; the centralized controller 80 is independent of the communication connection between the main communication unit 10 and the first terminal execution unit 30, and also independent of the communication connection between the main communication unit 10 and the second terminal execution unit 50; and provides a physical forced power cut-off for the power supply circuit.

[0095] It is understandable that the physical forced power-off method of the above-mentioned centralized controller 80 can be independent of the wireless dimming method between the main communication unit 10 and the first and second terminal execution units 30 and 50.

[0096] Specifically, when the centralized controller 80 receives a switching command from the platform terminal 60 or triggers the lighting timer switching logic stored locally, it controls the on / off state of the switch 90. The switch 90 is located on the power supply circuit of the first lighting unit 20 and the second lighting unit 40. Controlling the on / off state of the switch 90 can control the on / off state of the first lighting unit 20 and the second lighting unit 40.

[0097] The centralized controller 80 includes a mobile communication unit 81, a local storage unit 82, and a relay control module 83. The specific connection relationship will not be described in detail.

[0098] The central controller 80 receives the switching command from the platform terminal 60, which means that the mobile communication unit 81 receives the switching command from the platform terminal 60, triggers the relay control module 83 to operate, and controls the switch 90 to turn on and off.

[0099] The central controller 80 triggers the lighting timer switch logic stored locally, meaning that the lighting timer switch logic built into the local storage unit 82 is triggered, which triggers the relay control module 83 to operate and control the switch 90 to turn on and off.

[0100] The beneficial effects of this invention are as follows: the first and second terminal execution units 30 and 50 receive the same universal dimming value, and autonomously adapt and execute according to their respective built-in first and second dimming logics to drive the dimming of the first and second lighting units 20 and 40 respectively, thus being compatible with different lighting units; the control logic is decoupled, and under the background of compatibility with different lighting units, the lamp type adaptation rules of the lighting units are pushed down to the terminal execution units, and the main communication unit 10 only receives and sends the universal dimming value, avoiding the maintenance of a complex lamp type database and frequent switching of instruction formats; communication efficiency is optimized, since the universal dimming value issued by the main communication unit 10 does not distinguish between lamp types, the instruction length is fixed and uniform, the message overhead is reduced, the channel congestion rate is reduced, instruction conflicts are avoided, and the instruction arrival rate is improved; when adding a lamp type or a new lighting unit, only the chip of the corresponding terminal execution unit needs to be replaced or upgraded to update or replace the dimming logic, while the main communication unit 10 and the platform 60 do not need any changes, realizing extremely simple expansion and maintenance, low modification cost, and low operation and maintenance difficulty; the centralized controller 80 and the switch 90 construct an independent physical power-off path to eliminate the safety hazards of the lamps.

[0101] This can be formed by referring to any of the technical solutions provided above, and will not be elaborated here.

[0102] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0103] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lighting control system, characterized in that, include: The main communication unit is configured to receive a general dimming value, wherein the general dimming value is a brightness percentage value; A plurality of first terminal execution units are communicatively connected to the main communication unit and configured to acquire the general dimming value and execute first dimming logic according to the general dimming value to drive the first lighting unit to work; A plurality of second terminal execution units are communicatively connected to the main communication unit and configured to acquire the same general dimming value and execute a second dimming logic according to the general dimming value to drive the second lighting unit to work; the second dimming logic is different from the first dimming logic.

2. The lighting control system according to claim 1, characterized in that, The main communication unit includes a mobile communication module, a first wireless radio frequency module, and a first main control chip. The first main control chip is connected to the mobile communication module and the first wireless radio frequency module. The mobile communication module receives the general dimming value. The first main control chip is configured not to perform lamp type identification or differentiation processing on the general dimming value, but to transmit the same general dimming value to the first wireless radio frequency module; The first wireless radio frequency module encapsulates the universal dimming value into a unified wireless dimming frame and broadcasts it; the wireless dimming frame does not include a lamp type identification field.

3. The lighting control system according to claim 2, characterized in that, The first terminal execution unit includes a second wireless radio frequency module and a first chip. The second wireless radio frequency module is configured to communicate with the first wireless radio frequency module, receive and parse the wireless dimming frame, and obtain a general dimming value. The first chip is connected to the second wireless radio frequency module. The first chip has the first dimming logic and executes the first dimming logic, thereby configuring it to: determine whether the general dimming value is less than or equal to a preset safety threshold. If so, generate a first dimming signal based on the safety threshold. If not, generate a first dimming signal based on the general dimming value to drive the first lighting unit.

4. The lighting control system according to claim 2, characterized in that, The second terminal execution unit includes a second wireless radio frequency module and a second chip. The second wireless radio frequency module is configured to communicate with the first wireless radio frequency module, receive and parse the wireless dimming frame, and obtain a general dimming value. The second chip is connected to the second wireless radio frequency module. The second chip has the second dimming logic and executes the second dimming logic, thereby configuring it to output a second dimming signal according to the general dimming value to drive the second lighting unit.

5. The lighting control system according to claim 2, characterized in that, The first terminal execution unit and the second terminal execution unit each include a second wireless radio frequency module. The communication parameters of the second wireless radio frequency module are preset to be consistent with the communication parameters of the first wireless radio frequency module. The second wireless radio frequency module is configured to directly receive and parse the wireless dimming frame from the first wireless radio frequency module.

6. The lighting control system according to claim 1, characterized in that, It includes a central controller and a switch. The connection between the central controller and the switch is independent of the communication connection between the main communication unit and the first terminal execution unit, and also independent of the communication connection between the main communication unit and the second terminal execution unit. The output terminal of the central controller is connected to the switch, and the main contacts of the switch are connected in series in the power supply circuits of several first lighting units and second lighting units.

7. The lighting control system according to claim 6, characterized in that, The centralized controller includes a mobile communication unit, a local storage unit, and a relay control module. The mobile communication unit and the local storage unit are respectively connected to the relay control module. The relay control module is connected to the switch and controls the on / off state of the switch. The mobile communication unit is configured to receive switching commands from the platform. The local storage unit stores the lighting timer switching logic. The centralized controller is configured to control the on / off state of the switch when it receives the switch command or triggers the lighting timer switch logic.

8. A lighting control method, characterized in that, Including the following steps: The main communication unit receives and transmits a general dimming value, wherein the general dimming value is a brightness percentage value. A plurality of first terminal execution units acquire the general dimming value and execute first dimming logic according to the general dimming value to drive the first lighting unit to work; Several second terminal execution units acquire the same general dimming value and execute a second dimming logic according to the general dimming value to drive the second lighting unit to work; the first dimming logic is different from the second dimming logic.

9. The lighting control method according to claim 8, characterized in that, The first terminal execution unit executes the first dimming logic according to the general dimming value, specifically including: Determine whether the general dimming value is less than or equal to a preset safety threshold. If yes, generate the first dimming signal based on the safety threshold; otherwise, generate the first dimming signal based on the general dimming value.

10. The lighting control method according to claim 8, characterized in that, The second terminal execution unit executes the second dimming logic according to the general dimming value, specifically including: outputting a second dimming signal according to the general dimming value.

11. The lighting control method according to claim 8, characterized in that, When the centralized controller receives a switch command from the platform or triggers the lighting timer switch logic stored locally, it controls the on / off state of the first and second lighting lamps. The centralized controller is independent of the communication connection between the main communication unit and the first terminal execution unit, and is also independent of the communication connection between the main communication unit and the second terminal execution unit.

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