A control method of an optical angle adjustable lighting system

Abstract

The application provides a control method of an optical angle adjustable lighting system, belongs to the technical field of lighting, and is used for solving the problems of complicated angle adjustment, poor outdoor reliability and insufficient coordination of multiple light parameters of existing lighting equipment. The system comprises a control unit, an LED branch group, an execution unit and the like. The control unit is provided with a multi-gear dial code switch and an MCU with pre-stored optical calibration parameters. The LED branch group comprises cool / warm white LEDs and an integrated 90-degree large-angle and 45-degree small-angle light package, and a lens-free synthesis of intermediate angles. The execution unit uses a MOS tube array to adjust the LED branch current. The control method comprises power-on self-test, day and night target dimming judged by a detection unit and a sensing module, remote parameter adjustment combined with light parameter calibration compensation in priority, PWM control of current, angle, color temperature and light, and further comprises energy consumption monitoring, intelligent heat dissipation, graded fault alarm and regular calibration. The application is free of disassembly for angle adjustment, improves outdoor reliability, stably controls multiple parameters, reduces energy consumption and operation and maintenance costs, prolongs service life, and is suitable for industrial, commercial and road lighting.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to a control method for an optically adjustable lighting system. Background Technology

[0002] Lighting equipment is widely used in industrial lighting, commercial lighting and other fields. The adjustability of its optical angle, color temperature and power has an important impact on the lighting effect and energy efficiency.

[0003] However, existing lighting equipment suffers from the following drawbacks: Most lighting equipment has a fixed optical angle, and even the few adjustable devices require disassembling optical components and changing the relative positions of the light source and lens to adjust the angle. This cumbersome process makes it difficult to respond to lighting needs in real time, and frequent disassembly and reassembly can damage the optical components. Outdoor lighting equipment, due to limitations in its waterproof design, is prone to water ingress in humid or rainy environments, leading to short circuits and failures in internal electrical components, severely shortening the equipment's lifespan. When adjusting the optical angle, it is difficult to simultaneously match and adjust the color temperature and power, resulting in poor color temperature stability and brightness consistency, failing to meet the diverse lighting quality requirements of different scenarios such as indoor lighting, industrial work lighting, and road lighting. Most lighting equipment relies on manual switching and cannot automatically adjust its operating status according to ambient light intensity, increasing maintenance costs and causing energy waste. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an optically adjustable lighting system, thereby solving the problems of cumbersome optical angle adjustment, poor outdoor waterproof performance, and insufficient coordinated control of multiple light parameters in existing lighting equipment.

[0005] In the preferred embodiment, the optical angle adjustable lighting system includes a control unit, an LED branch group, a power supply module, an execution unit, a detection unit, a remote communication module, a fault alarm module, a heat dissipation enhancement module, an energy consumption monitoring module, a sensing module, a light parameter calibration module, and a lightning protection module. In the preferred embodiment, the control unit includes a DIP switch and an MCU. The DIP switch adopts a multi-position mechanical DIP structure, and each position is pre-stored with optically calibrated combination parameters of angle, color temperature, and light intensity for receiving local adjustment commands. The MCU is used to parse signals from each module, receive command data, fault alarms, and other status feedback, generate control commands, and ensure that all functions are executed in a coordinated manner.

[0006] In the preferred embodiment, the LED branch group includes C1 / C2 as cool white LEDs, W1 / W2 as warm white LEDs and a lens. The lens is integrally formed with a large-angle light packet corresponding to C1 and W1, with an illumination angle of 90°; and a small-angle light packet corresponding to C2 and W2, with an illumination angle of 45°. Any intermediate angle can be synthesized by adjusting the brightness ratio of the LED branch without moving the lens. In the preferred embodiment, a switching power supply is selected to provide stable power to all modules of the system.

[0007] In the preferred embodiment, the execution unit adopts a MOS transistor array to receive the control signal output by the MCU, adjust the current on / off and current magnitude of the LED branches (C1, W1, C2, W2) to realize the brightness ratio adjustment of each branch.

[0008] In the preferred embodiment, the detection unit includes a light-controlled switch and a temperature sensor. The light-controlled switch collects ambient light intensity and, in conjunction with the sensing module, determines the day / night mode to avoid false triggering during the day. The temperature sensor is embedded in the heat sink, detects the temperature in real time, and feeds it back to the MCU to determine when the fan of the heat dissipation enhancement module should start.

[0009] In the preferred embodiment, the remote communication module can automatically connect to a preset network, establish a communication link with the remote monitoring platform, receive parameter adjustment instructions issued by the platform and transmit them to the MCU, and at the same time, transmit the system's energy consumption data, fault information and optical parameter data back to the platform, thereby achieving unattended operation and maintenance, reducing on-site operation costs, and supporting remote fault diagnosis to improve operation and maintenance efficiency.

[0010] In the preferred embodiment, the fault alarm module includes a buzzer and an indicator light, which are connected to the control unit. The MCU in the control unit outputs control signals according to the fault type: when a safety fault such as an LED short circuit or lightning protection failure occurs, a continuous audible and visual alarm is triggered; when a functional fault such as calibration failure or abnormal energy consumption occurs, an intermittent audible and visual alarm is triggered; thus, rapid fault identification and timely early warning are achieved to prevent the fault from escalating.

[0011] In the preferred embodiment, the heat dissipation enhancement module includes heat sink fins and a fan, which are used to conduct the heat generated by the LED light board to the heat sink fins through the heat sink. When the temperature sensor detects that the heat sink temperature exceeds the standard, the MCU controls the fan to start, accelerate heat dissipation, prevent the LED from accelerating light decay due to high temperature, and extend the service life of the equipment.

[0012] In the preferred embodiment, the energy consumption monitoring module uses a current and voltage sampling chip to collect the voltage and current signals output by the power supply, convert them into digital signals, and transmit them to the MCU; the MCU calculates the real-time power consumption and cumulative energy consumption, and troubleshoots circuit abnormalities.

[0013] In the preferred embodiment, the sensing module detects moving targets within its range by transmitting and receiving specific signals. When a target is detected, it outputs a signal to the MCU, triggering the system to switch to normal brightness. When there is no target, the system maintains a low brightness mode, achieving adaptive dimming and energy saving, and reducing ineffective energy consumption.

[0014] In the preferred embodiment, the optical parameter calibration module includes an optical sensor that periodically initiates the calibration process. First, it collects the ambient light intensity without interference, then it lights up the LED according to preset parameters and collects the actual color temperature and light intensity. The MCU calculates the compensation coefficient and updates the current distribution logic to solve the parameter offset caused by the light decay of the LED after long-term use and ensure stable illumination accuracy.

[0015] In the preferred embodiment, the surge protection module includes a varistor and a gas discharge tube, which are connected in parallel to the input terminal of the power module. When a lightning strike or power grid surge occurs, the varistor quickly breaks down to conduct the surge current to the ground, and the gas discharge tube operates synchronously to suppress the residual surge. At the same time, the module fault detection terminal outputs a low level to the MCU, improving outdoor safety and preventing surge voltage from damaging the power supply and internal electrical components.

[0016] The method includes: S1. The power module is connected and outputs a stable voltage. The lightning protection, remote communication, and fault alarm modules are powered on simultaneously. The lightning protection module performs a self-test and stands ready. The remote communication module establishes a platform connection and reports the online status. The fault alarm module performs a self-test and confirms that it is normal. S2 and MCU wait for the power supply to stabilize, then read the preset parameters and historical calibration coefficients, and initialize the working modes of each interface and module; after completion, they report the system readiness status to the remote platform. S3: The light control switch collects ambient light intensity, the temperature sensor collects heat sink temperature, and the human body sensing module detects targets; the MCU comprehensively judges the day and night mode: during the day, it enters low power standby, and at night, depending on whether there are targets, it switches to low brightness or normal adjustment state, and at the same time controls the fan to start and stop according to the temperature. S4. Operate the DIP switch to switch gears. The gear signal is transmitted to the MCU. The MCU identifies the gear through level logic and retrieves the corresponding target parameters. The remote platform sends a parameter adjustment command. If the verification is successful, the remote command is parsed first, and the DIP signal is ignored. After parsing, the MCU reads the compensation coefficient of the optical parameter calibration module and corrects the target parameters. S5. Parameter Analysis and PWM Calculation: The MCU determines the LED branch brightness ratio, color temperature current ratio and total current reference according to the corrected parameters, and calculates the PWM duty cycle of each branch MOSFET. S6 and MCU output PWM signals to control MOSFETs, adjusting the current and brightness of each LED branch; light rays are superimposed through different light packets of the lens module to synthesize the target optical angle; S7. The sampling circuit collects the current of each LED branch in real time and feeds it back to the MCU. It compares the ratio of the actual current to the target current and adjusts the PWM duty cycle until the deviation meets the requirements to ensure color temperature stability. S8, the current control module summarizes the LED branch current and feeds it back to the MCU, calculates the actual light intensity, compares it with the target value, and then adjusts the PWM duty cycle to correct the total current to ensure that the light intensity meets the standard; S9. In normal brightness mode at night, the MCU continuously monitors the sensing signal. If no target is detected for a timeout, it switches to low brightness. When a target is detected again, it quickly restores normal brightness and controls the fan to start and stop according to the temperature data. S10: The energy consumption monitoring module collects data periodically, the MCU calculates and stores the energy consumption and uploads it to the remote platform, and clears the stored data for the day; S11. The MCU periodically wakes up the system to start calibration, collects ambient light intensity and actual LED light parameters, calculates compensation coefficients and updates parameter configuration; S12. The system monitors the status of each module in real time and handles faults according to priority: safety faults trigger emergency handling and alarms, functional faults trigger regular alarms, minor faults are only recorded locally, and alarms are stopped and feedback is sent to the platform after the fault is cleared. This invention provides a control method for an optically adjustable lighting system. It enables rapid switching of the optical angle without disassembling or moving optical components, offering convenient operation and preventing damage to optical components. A multi-layered sealing structure enhances outdoor waterproofing performance, ensuring equipment reliability and lifespan. Synchronous adjustment of optical angle, color temperature, and power is achieved through the collaboration of a current control module and an MCU, guaranteeing the stability and consistency of lighting parameters. Simultaneously, the adaptive control of the light-controlled switch reduces maintenance costs and energy consumption. An integrated heat dissipation design effectively lowers LED operating temperature and prevents light decay, ensuring the equipment's energy efficiency and lifespan. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of an optically adjustable illumination system according to the present invention; Figure 2 This is a schematic diagram of the LED splitter group optical package of the present invention; In the diagram: Control unit 1, LED branch group 2, power supply module 3, execution unit 4, detection unit 5, remote communication module 6, fault alarm module 7, heat dissipation enhancement module 8, energy consumption monitoring module 9, sensing module 10, light parameter calibration module 11, lightning protection module 12. Detailed Implementation

[0018] like Figure 1-2As shown, an optical angle adjustable lighting system includes a control unit 1, an LED branch group 2, a power supply module 3, an execution unit 4, a detection unit 5, a remote communication module 6, a fault alarm module 7, a heat dissipation enhancement module 8, an energy consumption monitoring module 9, a sensing module 10, a light parameter calibration module 11, and a lightning protection module 12.

[0019] In the preferred embodiment, the DIP switch of control unit 1 is a DS-312 model 3-bit mechanical DIP switch, and the MCU is an STM32F103C8T6 ARM Cortex-M3 core microcontroller. The pins of the DIP switches are connected to the MCU, and each channel is connected in series with a 10kΩ pull-up resistor to ensure that the pin is at a high level when there is no operation. The pin assignment of the MCU is as follows: PA0-PA2 are assigned to DIP input, PB0-PB3 are assigned to PWM output, PB6-PB7 are connected to the light control switch and light parameter calibration module 11 of detection unit 5, PB10-PB11 are connected to energy consumption monitoring module 9, PC0 is assigned to the input of sensing module 10, PC1 is assigned to the fault input of surge protection module 12, PD0 is assigned to the buzzer control of fault alarm module 7, PD1 and PD2 are assigned to fault alarm module 7, PA9-PA10 are assigned to the remote communication module 6, and PA1 is connected to the temperature sensor of detection unit 5.

[0020] In the preferred scheme, C1 / C2 of LED branch group 2 are Samsung LM281B cool white LEDs with a luminous flux of 20lm and a color temperature of 5700K; W1 / W2 are warm white LEDs of the same model with a luminous flux of 20lm and a color temperature of 3000K; each branch has 5 LEDs connected in series with a total voltage of 15-16V, powered by the 12V output of power module 3, and each branch has a 10Ω / 1W current-limiting resistor connected in series to control the current to be stable at 60mA.

[0021] In the preferred embodiment, power module 3 uses a Mean Well LRS-50-12 switching power supply with an input voltage of 100-240V AC, an output voltage of 12V DC, and a power of 50W. A 1000μF / 16V electrolytic capacitor and a 0.1μF ceramic capacitor are connected in parallel at the power output terminal to filter low-frequency noise and high-frequency noise. The pin is connected to the PC4 pin of the MCU in control unit 1. When the output voltage is stabilized at 12V, the pin outputs a high level. After the MCU detects the high level, it confirms that the power supply is normal.

[0022] In the preferred embodiment, the execution unit 4 is an IRF540N N-channel enhancement-mode MOSFET. The gate is connected to the PWM output pin of the MCU in the control unit 1 through a 1kΩ current-limiting resistor, the source is grounded through a shunt resistor, and the drain is connected to the positive terminal of the LED shunt group 2. The sampling circuit collects the current through the voltage across the shunt resistor. The voltage signal is amplified and then input to the ADC pin of the MCU in the control unit 1 to improve the sampling accuracy.

[0023] In the preferred embodiment, the light control switch of the detection unit 5 is a BH1750FVI module with a measurement range of 0-65535 lux. It collects light intensity at a frequency of 1 Hz, starts the measurement by sending a command, and calculates the light intensity. The temperature sensor communicates with the MCU of the control unit 1 through a single bus protocol. The MCU sends a reset signal to read the temperature data.

[0024] In the preferred embodiment, the remote communication module 6 adopts an ESP8266-12F WiFi module, which is connected to the MCU in the control unit 1; the module firmware is burned with a client program to establish a communication link with the remote monitoring platform and realize two-way communication.

[0025] In the preferred embodiment, the fault alarm module 7 uses an active buzzer, with its positive terminal connected to the PD0 pin of the MCU in the control unit 1 through a 1kΩ current-limiting resistor; the positive terminal of the red LED is connected to the PD1 pin through a 220Ω current-limiting resistor, and the positive terminal of the yellow LED is connected to the PD2 pin through a 220Ω current-limiting resistor, with the negative terminals of both grounded; the buzzer sounds when PD0 outputs a high level, and the corresponding LED lights up when PD1 / PD2 outputs a high level.

[0026] In the preferred embodiment, the heat sink body of the heat dissipation enhancement module 8 is made of aluminum alloy, with two embedded U-copper heat pipes. The heat pipes and the heat sink are bonded together with thermal grease and are located on the backplate of the LED branch group 2. The heat dissipation fins are made of aluminum alloy with a comb-like structure and a fin spacing of 5mm. The fan is an AD0812HB-A71GL silent fan, which is connected to the PD3 pin of the MCU in the control unit 1 and the 12V output terminal of the power module 3 through a 2-pin terminal. The fan starts when the PD3 output is high. The temperature sensor in the detection unit 5 is a DS18B20 digital temperature sensor, which is connected to the PA1 pin of the MCU in the control unit 1 through a bus to monitor the temperature.

[0027] In the preferred embodiment, the energy consumption monitoring module 9 uses the INA219 module. The SDA pin is connected to PB11 of the MCU in the control unit 1, and the SCL pin is connected to PB10. The module has a built-in 0.1Ω sampling resistor, a refresh frequency of 100kHz, a current measurement accuracy of ±1%, and supports bidirectional current measurement from -3.2A to 3.2A. The MCU of the control unit 1 sends configuration instructions to read the voltage register and current register data and calculates the real-time power consumption and cumulative energy consumption.

[0028] In the preferred embodiment, the sensing module 10 uses an RCWL-0516 microwave radar sensor, and the OUT pin is connected to the PC0 pin of the MCU in the control unit 1 through a 1kΩ current-limiting resistor. To reduce false triggering, the MCU of the control unit 1 detects a high level three times at 200ms intervals to determine the presence of a target, thus filtering out interference signals.

[0029] In the preferred embodiment, the optical parameter calibration module 11 adopts the TSL2591 module, which has a built-in infrared filter to avoid infrared light interference with color temperature detection. The illumination measurement range is 0.1-65535 lux, and the color temperature measurement range is 2800K-6500K. Before calibration, the MCU of the control unit 1 controls the LED branch group 2 to turn off for 30 seconds and sends a calibration command to the optical parameter calibration module 11 to read the ambient light intensity. When the ambient light intensity is >10 lux, the calibration command is uploaded through the remote communication module 6.

[0030] In the preferred embodiment, the surge protection module 12 consists of a 10D471K varistor and a GDT-8 / 20 gas discharge tube connected in series. One end of the varistor is connected to the live wire of the power supply, and the other end is connected to one end of the gas discharge tube, while the other end of the gas discharge tube is connected to the ground wire of the power supply. The varistor has a rated voltage of 470V, a maximum inrush current of 10kA, and a response time of < 25ns. The gas discharge tube has a DC breakdown voltage of 90V-110V and a discharge current of 20kA. The module's fault detection terminal is connected to the PC1 pin of the MCU in the control unit 1 through a 10kΩ pull-up resistor. Under normal conditions, the varistor is in a high-impedance state, and the detection terminal outputs a high level. When the varistor breaks down and short-circuits, the detection terminal outputs a low level, triggering the fault alarm module 7 to alarm.

[0031] In a preferred embodiment, a control method for an optically adjustable lighting system includes the following steps: S1. The power module 3 input terminal is connected to 220V AC mains power and outputs 12V voltage; the surge protection module 12 enters standby mode, and the fault detection terminal outputs a high level to the PC1 pin of the MCU in the control unit 1 through a 10kΩ pull-up resistor; the remote communication module 6 is powered on and automatically connects to the preset SSID. After successful connection, it establishes a connection with the remote platform; the fault alarm module 7 is powered on, and after the control unit 1 completes its self-test, it enters the initialization stage. S2. Control unit 1 executes the initialization program, reads the verification parameters and compares them with the currently calculated 8 sets of preset parameters. If they match, the 8 sets of parameters are read into RAM. Each set of parameters occupies 16 bytes, including 2 bytes for angle, 2 bytes for color temperature, 2 bytes for illumination, 4 bytes for compensation coefficient, and 6 bytes for reserved parameters. If the verification does not match, control unit 1 controls the yellow LED of fault alarm module 7 to stay on and uploads the parameter error fault through remote communication module 6. Then, it reads the compensation coefficient of light parameter calibration module 11. After compensation is completed, it initializes each interface. S3, the light control switch of detection unit 5 collects light intensity, the temperature sensor collects temperature, and control unit 1 sends measurement commands and reads light intensity and temperature data; control unit 1 collects the output level of sensing module 10, and determines that when the light intensity is >100 lux for 3 consecutive times, it is daytime, control unit 1 controls LED branch group 2 to turn off, and sends a sleep command to sensing module 10; when the light intensity is <100 lux for 3 consecutive times, it is nighttime, control unit 1 sends a wake-up command to sensing module 10, when the level is low for 3 consecutive times, it retrieves the parameters of the target illumination of the current level, calculates the PWM duty cycle to control LED branch group 2 to enter low brightness mode; when the level is high for 3 consecutive times, it controls LED branch group 2 to light up; at the same time, control unit 1 controls the fan of heat dissipation enhancement module 8 according to the temperature data of detection unit 5, when the temperature is >60℃, the fan is started; when the temperature is <60℃, the PD3 pin outputs a low level to turn off the fan; S4. Control unit 1 monitors local DIP switches and remote commands. The 3 pins of the local DIP switches correspond to 8 positions. The MCU reads the pin levels every 100ms. For example, when PA0=1, PA1=1, PA2=0 corresponding to position 4, it retrieves the parameters for position 4 from the pre-stored parameter area: angle 65°, color temperature 4500K, and illumination 1000 lux. In remote commands, the remote platform sends parameter adjustment instructions. The remote communication module 6 receives these instructions and transmits them to control unit 1. The MCU verifies the validity of the instructions using CRC8. If the verification passes, the remote parameters are used preferentially. Simultaneously, control unit 1 reads the historical compensation coefficients from the light parameter calibration module 11 and corrects the target parameters. S5, Control Unit 1 is analyzed according to the corrected parameters; in the angle analysis, 65° corresponds to a brightness ratio of 50%:50% for the large angle branch C1, W1 and the small angle branch C2, W2. The total current reference value is equal to the corrected illumination ratio to the preset illumination. The total current for the large angle is the total current multiplied by the large angle brightness ratio, and the total current for the small angle is the total current multiplied by the small angle brightness ratio; in the color temperature analysis, the current of each LED is obtained by linear interpolation through the pre-stored color temperature ratio reference table; in the duty cycle calculation, the maximum current of the MOS transistor of the execution unit 4 corresponds to a PWM duty cycle of 100%, and the output intensity can be adjusted according to the PWM duty cycle.

[0032] S6. Control unit 1 outputs a PWM signal, which is transmitted to the gate of the MOS transistor in execution unit 4. The MOS transistor adjusts its drain current according to the PWM signal, so that C1, C2, W1, and W2 can stably output the set current. The light rays from C1 and W1 are refracted by the large-angle light packet of the lens module, and the light rays from C2 and W2 are refracted by the small-angle light packet. The two light rays are superimposed to form the target emission angle, thus completing the angle adjustment. S7. Execution unit 4 collects the current of each LED, converts the current signal into a voltage signal and amplifies it, and then inputs it into control unit 1. The MCU compares the actual current with the corrected target current. If the deviation is >5%, the PWM duty cycle of the corresponding MOS transistor is adjusted until the deviation of all branch currents is <5%, thus completing the color temperature adjustment. S8, the current control module of the execution unit 4 summarizes the current of the four LEDs and obtains the actual value of the total current; the control unit 1 calculates the actual illumination and the correction target, and starts PID regulation to complete the illumination intensity adjustment.

[0033] S9. In normal brightness mode at night, control unit 1 reads the signal from sensing module 10; when no target is detected for 5 consecutive times, it calculates the low brightness parameter and controls LED branch group 2 to enter low brightness mode; when a target is detected again, normal brightness is restored; at the same time, MCU continuously monitors the temperature data of detection unit 5, and starts the fan of heat dissipation enhancement module 8 when the temperature is >60℃, and turns off the fan when the temperature is <60℃. S10, the energy consumption monitoring module 9 transmits voltage and current data to the control unit 1 every 0.5s. The MCU calculates the real-time power consumption and stores it temporarily. The cumulative energy consumption is summarized every hour. At 0:00 every day, the cumulative energy consumption of the day for 24 hours is summarized and uploaded to the remote platform through the remote communication module 6. After the remote platform confirms the feedback, the MCU clears the energy consumption data for the day. S11. Every 30 days, control unit 1 shuts down LED branch group 2 for 30 seconds and collects ambient light intensity through light parameter calibration module 11. If the ambient light intensity is <10 lux, control LED branch group 2 to light up according to the parameters of level 1. After 5 seconds, collect the actual color temperature and illumination. MCU calculates and stores the compensation coefficient and updates the current distribution logic of all levels. If the ambient light intensity is >10 lux, the calibration time is extended by 1 hour. If the condition is not met for 3 consecutive hours, a fault is reported and the historical compensation coefficient is maintained. S12. The system monitors the status of each module in real time and handles faults according to priority: Safety faults are the highest priority: when the current of LED branch group 2 is detected to be >1.5A, i.e. short circuit, the MCU immediately cuts off the power supply to LED branch group 2, controls the buzzer of the fault alarm module 7 to sound continuously and the red LED to stay on, and uploads the severe fault code through the remote communication module 6; when the surge protection module 12 fails, the fault code is recorded and the same alarm action is triggered, and the mains power input is cut off at the same time. Functional faults are of medium priority: When the optical parameter calibration module 11 fails to meet the calibration standard for 3 consecutive hours, a medium fault code is recorded, and the buzzer of the fault alarm module 7 is controlled to sound intermittently and the yellow LED to flash; when the energy consumption monitoring module 9 detects a sudden increase in energy consumption of >20%, a fault code is recorded and the same alarm action is triggered. Minor faults are of low priority: if the sensing module 10 is falsely triggered more than 10 times within 1 minute, a minor fault code is recorded, and only the yellow LED of the fault alarm module 7 remains constantly lit; All fault codes are stored in the fault log area. After the fault is cleared, the MCU controls the fault alarm module 7 to stop operating and uploads the fault clearance signal through the remote communication module 6.

[0034] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A control method for an optically adjustable lighting system, characterized in that, The optical angle adjustable lighting system includes a control unit, an LED branch group, a power supply module, an execution unit, a detection unit, a remote communication module, a fault alarm module, a heat dissipation enhancement module, an energy consumption monitoring module, a human body sensing module, a light parameter calibration module, and a lightning protection module. The control unit includes a DIP switch and an MCU. The DIP switch adopts a multi-position DIP structure. Each position is pre-stored with optically calibrated combination parameters of angle, color temperature and light intensity, which are used to receive adjustment commands. The MCU is used to parse signals from various modules, receive command data, fault alarms and other status feedback, and generate control commands. The LED splitter group includes cool-color LEDs, warm-color LEDs, and lenses. The lens is integrally formed with a large-angle light packet and a small-angle light packet. The large-angle light packet corresponds to two LEDs with different color temperatures and the illumination angle is obtuse. The small-angle light packet corresponds to two LEDs with different color temperatures and the illumination angle is acute. Any intermediate angle can be synthesized by adjusting the brightness ratio of the LED splitter without moving the lens. The power supply module uses a switching power supply to provide stable power to all modules of the system. The execution unit uses a MOS transistor array to receive control signals output by the MCU, adjust the current on / off and current magnitude of the LED branch circuits, and realize the brightness ratio adjustment of each branch circuit. The optical parameter calibration module includes an optical sensor for periodically initiating the calibration process; The light parameter calibration module collects the ambient light intensity without interference and the actual color temperature and light intensity of each level when the LED branch group is lit; this information is used by the control unit to calculate the compensation coefficient, update the current distribution logic, and correct the parameter offset of the LED branch group. The execution unit also includes a sampling circuit and a current control module; The detection unit includes a light-controlled switch and a temperature sensor; the light-controlled switch is used to collect ambient light intensity, determine day and night modes, and avoid accidental triggering during the day. Temperature sensor, used to detect temperature in real time and feed it back to MCU; The control method includes the following steps: S1. The power module is connected and outputs a stable voltage. The lightning protection, remote communication, and fault alarm modules are powered on simultaneously. The lightning protection module self-tests and stands ready. The remote communication module establishes a connection with the remote monitoring platform and reports its online status. The fault alarm module self-tests and confirms that it is normal. S2. After the power supply stabilizes, the MCU reads the verification parameters and preset parameters, and initializes each interface; after completion, it reports the system readiness status to the remote monitoring platform. S3: The light control switch collects ambient light intensity, the temperature sensor collects heat sink temperature, and the human body sensing module detects targets; the MCU comprehensively judges the day and night mode: during the day, it enters low power standby, and at night, depending on whether there are targets, it switches to low brightness or normal adjustment state, and at the same time controls the fan to start and stop according to the temperature. S4. Operate the DIP switch to change the gear position. The gear position signal is transmitted to the MCU. The MCU identifies the gear position through level logic and retrieves the corresponding target parameters. The remote monitoring platform sends a parameter adjustment command. If the verification is successful, the remote command is parsed first, and the DIP signal is ignored. After parsing, the MCU reads the compensation coefficient of the optical parameter calibration module and corrects the target parameters. S5. Parameter Analysis and PWM Calculation: The MCU determines the LED branch brightness ratio, color temperature current ratio and total current reference according to the corrected parameters, and calculates the PWM duty cycle of each branch MOSFET. S6. The MCU outputs a PWM signal to control the MOSFET, adjusting the current and brightness of each LED branch; light passes through the lens and the large-angle light packet and the small-angle light packet are superimposed to synthesize the target optical angle. S7. The sampling circuit collects the current of each LED branch in real time and feeds it back to the MCU. It compares the actual current with the target current ratio and adjusts the PWM duty cycle until the deviation meets the requirements, ensuring color temperature stability. Specifically, the sampling circuit converts the current signal of each LED branch into a voltage signal, amplifies it, and inputs it to the control unit. The MCU compares the actual current of each branch with the corrected target current. If the deviation is >5%, the PWM duty cycle of the corresponding MOSFET is adjusted until the deviation of the current of all branches is <5%. S8. The current control module summarizes the LED branch current and feeds it back to the MCU. It calculates the actual light intensity and compares it with the target value. Then, it adjusts the PWM duty cycle to correct the total current to ensure that the light intensity meets the standard. Specifically, the current control module summarizes the current of the four LEDs to obtain the actual value of the total current. The MCU compares the calculated actual light intensity with the corrected target value and adjusts the PWM duty cycle through PID to correct the total current. S9. In normal brightness mode at night, the MCU continuously monitors the sensing signal. If no target is detected for a timeout, it switches to low brightness. When a target is detected again, it quickly restores normal brightness and controls the fan to start and stop according to the temperature data. S10: The energy consumption monitoring module collects data periodically, the MCU calculates and stores the energy consumption and uploads it to the remote monitoring platform, and clears the stored data for the day. S11. The MCU periodically wakes up the system to start calibration, collects ambient light intensity and actual LED light parameters, calculates compensation coefficients and updates parameter configurations. The periodic calibration process is as follows: Every 30 days, the control unit shuts down the LED branch group for 30 seconds and collects ambient light intensity through the light parameter calibration module. If the ambient light intensity is <10 lux, the control unit controls the LED branch group to light up according to parameter 1. After 5 seconds, the actual color temperature and illuminance are collected, the MCU calculates and stores the compensation coefficients, and updates the current distribution logic of all levels. If the ambient light intensity is >10 lux, the calibration time is extended by 1 hour. If the conditions are not met for 3 consecutive hours, a fault is reported, and the historical compensation coefficients are maintained.

2. The control method for an optically adjustable lighting system according to claim 1, characterized in that: The heat dissipation enhancement module includes heat sink fins and a fan; the heat sink fins are used to receive the heat conducted by the LED branch group through the heat sink; when the temperature sensor of the detection unit detects that the heat sink temperature exceeds the standard, the MCU in the control unit controls the fan to start, accelerating heat dissipation.

3. The control method for an optically adjustable lighting system according to claim 1, characterized in that: The energy consumption monitoring module uses a current and voltage sampling chip to collect the voltage and current signals output by the power module, convert them into digital signals, and transmit them to the control unit to calculate real-time power consumption and cumulative energy consumption, and to troubleshoot circuit abnormalities.

4. The control method for an optically adjustable illumination system according to claim 1, characterized in that: The remote communication module automatically connects to a preset network, establishes a communication link with the remote monitoring platform, receives parameter adjustment instructions issued by the remote monitoring platform, and transmits the instructions to the control unit; it also transmits the system's energy consumption data, fault information, and optical parameter data back to the remote monitoring platform.

5. The control method for an optically adjustable lighting system according to claim 1, characterized in that: The fault alarm module includes a buzzer and an LED indicator, and is connected to the control unit. The control unit outputs a control signal according to the fault type to trigger the buzzer to sound and / or the LED indicator to turn on and off. The surge protection module includes a varistor and a gas discharge tube, which are connected in parallel to the power module. When struck by lightning or a power grid surge, the varistor quickly breaks down to conduct the surge current to the ground, and the gas discharge tube operates synchronously to suppress the residual surge. At the same time, it outputs a signal to the control unit to trigger the fault alarm module.

6. The control method for an optically adjustable lighting system according to claim 1, characterized in that, It also includes the following steps: S12. The control unit monitors the status of each module in real time and handles faults according to priority: During safety fault handling, when the current of LED branch group 2 is detected to be greater than the preset short-circuit current or the surge protection module fails, the MCU immediately cuts off the power supply to the LED branch group, controls the fault alarm module to trigger a safety alarm, and uploads the severe fault code through the remote communication module. In the process of handling functional faults, when the optical parameter calibration module fails to meet the calibration standard continuously, or when the energy consumption monitoring module detects that the energy consumption increases for a short period of time, exceeding the preset energy consumption, the MCU records a moderate fault code, controls the fault alarm module to trigger a functional alarm, and uploads the moderate fault code through the remote communication module. In handling minor faults, when the human body sensing module is triggered multiple times in a short period of time, the MCU records the minor fault code, and the fault alarm module triggers the minor alarm. All fault codes are stored in the control unit. After the fault is cleared, the MCU controls the fault alarm module to stop alarming and uploads the fault clearance signal through the remote communication module.

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