Intelligent annular light supplementing lamp and control method thereof

Abstract

The invention relates to the field of industrial visual inspection, particularly discloses an intelligent annular light supplement lamp and a control method thereof, and solves the problems of difficult installation on a complex curved surface tank body and window surface reflection interference by constructing a magnetic attraction type annular light supplement structure matched with a window contour and utilizing cooperation of a magnetic attraction array and a soft light assembly. Meanwhile, according to the scheme, an intelligent response mechanism based on an industrial control sequence is established, real-time process node identification is received through an industrial communication interface, an accurate PWM control signal is generated through analysis, and a light source is driven to output constant soft light in a specific reaction stage. The logic closed loop not only eliminates the limitation of the dark environment in the container on visual monitoring, but also realizes the deep coupling of the light supplementing action and the automatic production process, and effectively overcomes the defects of high energy consumption, response lag and lack of linkage of the traditional manual or normally-on light source.

Description

Technical Field

[0001] This application relates to the field of industrial visual inspection, and more specifically, to an intelligent ring light. Background Technology

[0002] In the field of industrial automation monitoring, various enclosed tanks, reactors, and liquid storage containers are typically equipped with transparent glass windows for observing changes in internal liquid levels, material states, or composition. To achieve unmanned automated monitoring, visual sensors or cameras are often installed outside the windows for image acquisition. However, such applications face significant lighting challenges: on the one hand, the interior of the container is usually dark, and insufficient lighting leads to low contrast and blurred details in the images acquired by the visual devices; on the other hand, the external ambient light is complex and variable, including projections from other equipment or light reflections, which can easily create uneven shadows, light spots, or strong reflections on the glass surface of the window, severely interfering with the accuracy and stability of visual judgment.

[0003] To address the aforementioned issues, existing solutions often employ fixed, constantly lit industrial lights or manually operated supplemental lighting. While constantly lit industrial lights provide a light source, they are often accompanied by significant energy waste and struggle to achieve uniform localized illumination for specific viewing windows, easily generating continuous glare interference. Manually switched supplemental lighting, on the other hand, relies entirely on manual intervention, making it impossible to synchronize with automated process sequences and meet the demands of continuous, real-time monitoring. Although general-purpose ring light sources for machine vision exist, these products are mostly designed for laboratory or planar inspection scenarios and are not structurally optimized for the curved surface features and harsh environments of industrial containers. This often necessitates complex additional clamps or adhesives for installation on metal tanks, making installation and maintenance extremely inconvenient. More importantly, existing simple light control or independent switching devices lack deep integration with industrial control systems, failing to intelligently activate and deactivate based on specific process nodes (such as reaction stages or feeding times). This results in a disconnect between supplemental lighting actions and production logic, preventing true on-demand energy saving and intelligent response.

[0004] Therefore, a smart ring light control scheme is desired. Summary of the Invention

[0005] To address the aforementioned technical problems, this application is proposed. An embodiment of this application provides an intelligent ring-shaped fill light.

[0006] According to one aspect of this application, an intelligent ring-shaped fill light is provided, comprising: a ring-shaped support frame, wherein a ring-shaped mounting groove is recessed along the circumferential direction on the front side of the ring-shaped support frame; a linear light-emitting component, wherein the linear light-emitting component is embedded in the ring-shaped mounting groove; a soft light diffuser, wherein the soft light diffuser covers the opening of the ring-shaped mounting groove and is fixed to the front end face of the ring-shaped support frame; a magnetic adsorption array, wherein the magnetic adsorption array is uniformly embedded in the mounting holes on the back of the ring-shaped support frame; and an integrated drive control unit, wherein the integrated drive control unit is disposed in an electrical compartment reserved inside the ring-shaped support frame, and the linear light-emitting component and the integrated drive control unit are electrically connected through internal wires.

[0007] In the aforementioned intelligent ring-shaped supplemental light, the soft light diffuser and the front end face of the ring-shaped support frame are sealed by interference fit or adhesive bonding.

[0008] The aforementioned intelligent ring-shaped fill light also includes an anti-slip buffer pad, which is attached to the back surface of the ring-shaped support frame and covers or surrounds the magnetic adsorption array.

[0009] In the aforementioned intelligent ring-shaped supplemental light, the linear light-emitting component is embedded in the inner bottom surface of the ring-shaped mounting groove and is fixedly connected to the bottom of the groove by thermally conductive adhesive or mechanical clips.

[0010] The aforementioned intelligent ring light also includes an industrial communication interface module and a power input interface. Both the industrial communication interface module and the power input interface are installed on the outer wall or back of the ring support frame, and both are electrically connected to the internal integrated drive control unit.

[0011] According to another aspect of this application, a control method for an intelligent ring-shaped supplementary light is provided, comprising: based on the acquired real-time process node identifier, performing traversal retrieval and logical matching in a preset supplementary light logic mapping table to obtain an original control command containing the target device address and the required brightness value; based on the industrial fieldbus protocol standard, performing protocol header encapsulation and cyclic redundancy check code calculation on the original control command to obtain a serialized communication data packet; after receiving the serialized communication data packet, performing terminal instruction parsing and validity verification on the serialized communication data packet to obtain a PWM duty cycle signal; based on the PWM duty cycle signal, performing gate switching frequency modulation and inductor energy storage adjustment on the constant current drive circuit to obtain a constant drive current strictly corresponding to the duty cycle; collecting the device operating parameters excited by the constant drive current and comparing them with a preset safety threshold to generate state feedback data for confirming the closed-loop control result.

[0012] In the above-mentioned control method for intelligent ring-shaped supplementary lighting, after receiving a serialized communication data packet, the serialized communication data packet is parsed by the terminal instruction and its validity is verified to obtain a PWM duty cycle signal. This includes: deconstructing the address bit field of the serialized communication data packet and making a local hardware unique identifier logic decision to obtain a data frame to be verified; performing cyclic redundancy check calculation and payload data stripping on the data frame to be verified to obtain a decimal brightness control word; and performing time-domain signal conversion on the decimal brightness control word to obtain a PWM duty cycle signal.

[0013] In the control method of the above-mentioned intelligent ring light, based on the PWM duty cycle signal, the gate switching frequency of the constant current drive circuit is modulated and the inductor energy storage is adjusted to obtain a constant drive current that strictly corresponds to the duty cycle. This includes: performing level shifting and edge steepening processing on the PWM duty cycle signal to obtain the power switch gate voltage; and based on the power switch gate voltage, performing chopping control on the switching transistor in the buck circuit and performing closed-loop current stabilization operation on the energy release process in the inductor through an error amplification feedback mechanism to obtain a constant drive current.

[0014] Compared with existing technologies, this application provides an intelligent ring-shaped supplementary light and its control method. By constructing a magnetic ring-shaped supplementary light structure adapted to the window contour, and utilizing a magnetic adsorption array in conjunction with a soft light component, it solves the problems of difficult installation on complex curved tank surfaces and interference from reflective surfaces. Simultaneously, the solution establishes an intelligent response mechanism based on industrial control sequences. It receives real-time process node identifiers through an industrial communication interface, analyzes and generates precise PWM control signals, and drives the light source to output constant soft light at specific reaction stages. This closed-loop logic not only eliminates the limitations of the dark environment inside the container on visual monitoring but also achieves deep coupling between the supplementary light action and the automated production process, effectively overcoming the shortcomings of traditional manual or constantly lit light sources, such as high energy consumption, slow response, and lack of linkage. Attached Figure Description

[0015] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 This is an exploded view of the composition and structure of an intelligent ring light according to an embodiment of this application.

[0017] Figure 2 This is a front view of an intelligent ring light according to an embodiment of this application.

[0018] Figure 3This is a rear view of an intelligent ring light according to an embodiment of this application.

[0019] Figure 4 This is a physical image of an intelligent ring light according to an embodiment of this application.

[0020] Figure 5 This is a data processing flowchart of the control method for an intelligent ring light according to an embodiment of this application.

[0021] Among them, 1: ring support frame; 2: linear light-emitting component; 3: soft light diffuser; 4: magnetic adsorption array. Detailed Implementation

[0022] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0023] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0024] While this application makes various references to certain modules of the systems according to embodiments of this application, any number of different modules can be used and run on user terminals and / or servers. The modules described are merely illustrative, and different aspects of the systems and methods may use different modules.

[0025] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, various steps can be processed in reverse order or simultaneously as needed. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0026] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0027] Addressing the technical challenges of insufficient internal lighting, severe external glare interference, and the difficulty of adapting traditional light sources to curved tank surfaces while lacking industrial control linkage mechanisms, this solution utilizes a magnetic intelligent ring-shaped supplementary lighting structure. During implementation, the solution employs a magnetic adsorption array on the back of the ring frame, combined with anti-slip buffer pads, to achieve rapid and stable adhesion to complex curved surfaces. More importantly, through a built-in integrated drive control unit interconnected with an industrial fieldbus, it can capture process node identifiers in real time and retrieve corresponding brightness parameters from a pre-set logic table. Then, through protocol unpacking and PWM duty cycle modulation, it drives a constant current circuit to generate a precise supplementary light beam. This mechanism ensures that the light source is activated only during specific process windows, using a diffuser to eliminate window glare, achieving precise synchronization and closed-loop feedback between the supplementary lighting action and the automated production sequence.

[0028] Figure 1 This is an exploded view of the composition and structure of an intelligent ring light according to an embodiment of this application. Figure 2 This is a front view of an intelligent ring light according to an embodiment of this application. Figure 3 This is a rear view of an intelligent ring light according to an embodiment of this application. Figure 4 This is a physical image of an intelligent ring light according to an embodiment of this application. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the intelligent ring light according to an embodiment of this application includes: a ring support frame 1, the front of which is recessed along the circumferential direction with a ring-shaped placement groove; a linear light-emitting component 2, which is embedded in the ring-shaped placement groove; a soft light diffuser 3, which is disposed at the opening of the ring-shaped placement groove and fixed to the front end face of the ring support frame 1; a magnetic adsorption array 4, which is uniformly embedded in the mounting holes on the back of the ring support frame 1; and an integrated drive control unit (not shown in the figure), which is disposed in an electrical compartment reserved inside the ring support frame 1, and the linear light-emitting component 2 and the integrated drive control unit are electrically connected through internal wires.

[0029] Specifically, the annular support frame 1, as the main load-bearing component of the device, is made of aluminum alloy and precision-machined by CNC, possessing a geometric shape that matches the outer contour of the target industrial container's viewing window. A U-shaped annular mounting groove is recessed along the circumference on the front side of the annular support frame 1. This groove structure serves not only as a light path guide but also as a physical protection. The linear light-emitting component 2 is embedded in the inner bottom surface of this annular mounting groove and is fixedly connected to the bottom of the groove using thermally conductive adhesive or mechanical clips, ensuring that the heat generated by the light source can be effectively dissipated through the annular support frame 1. A soft light diffuser 3 covers the opening of the annular mounting groove and is sealed to the front end of the annular support frame 1 using an interference fit or sealant. This connection method encloses the linear light-emitting component 2 within the groove, preventing external dust and moisture from intruding, while simultaneously converting the point light source into a uniform surface light source. On the back of the device, a magnetic adsorption array 4 is uniformly embedded in the mounting holes on the back of the annular support frame 1. These neodymium iron boron permanent magnets provide sufficient adsorption force, allowing the device to be directly adsorbed onto the surface of the metal container. In addition, anti-slip buffer pads are attached to the back surface of the annular support frame 1 and cover or surround the magnetic adsorption array 4, located between the device and the mounting surface, serving to enhance friction and protect the mounting surface. The integrated drive control unit is located in the electrical compartment reserved inside the annular support frame 1, and the linear light-emitting component 2 is electrically connected to the integrated drive control unit through internal wires, forming a complete electrical circuit.

[0030] Furthermore, the intelligent ring light interacts with the external environment through an industrial communication interface module and a power input interface. Both interfaces are installed on the outer wall or back of the ring support frame 1 and are electrically connected to the internal integrated drive control unit. The power input interface receives a DC 12V or 24V industrial standard DC power supply, which is regulated by the internal power management circuit to power the system. The hardware topology supports multi-node networking design. Multiple intelligent ring light units can be daisy-chained on the same industrial fieldbus (such as RS-485, CAN bus, or industrial Ethernet) through the industrial communication interface module and ultimately connected to a central industrial control PLC or host computer. Each device is assigned a unique hardware address at the factory or during configuration, enabling the central controller to independently address and control specific nodes on the bus. The integrated drive control unit integrates a constant current drive circuit, a communication protocol parsing chip, and a signal conditioning circuit, forming the hardware foundation for the conversion from digital instructions to analog optical signals.

[0031] Specifically, the intelligent ring light follows intelligent response logic based on industrial control sequences during operation. When the external industrial control PLC executes a specific process node, such as the reactor entering the heat preservation stage or the liquid level determination step, the PLC generates a raw control command containing the target equipment address and the required brightness value according to the preset process logic. This command is transmitted to the integrated drive control unit of the intelligent ring light via the fieldbus. After receiving the serialized communication data packet, the integrated drive control unit first deconstructs the address field and compares it with the local hardware unique identifier. After confirming that the target of the command is the local machine, it parses the data packet to obtain the brightness control parameters. Subsequently, the control unit outputs the corresponding PWM duty cycle signal to the constant current drive circuit to adjust the power supply current of the linear light-emitting component 2, so that it emits light of the specified brightness. After the scattering effect of the soft light diffuser 3, the light evenly illuminates the inside of the viewing window, and completes image acquisition in conjunction with the external vision sensor. When the process step is completed, the PLC sends a shutdown command, the integrated drive control unit cuts off the output, the device turns off and enters a zero-energy standby state. Meanwhile, the device can collect internal operating parameters such as temperature or current in real time, encapsulate them as status feedback data and send them back to the PLC to realize closed-loop monitoring and fault early warning.

[0032] Figure 5 This is a data processing flowchart of the control method for an intelligent ring light according to an embodiment of this application. Figure 5 As shown, the control method for the intelligent ring-shaped supplementary light includes: S100, based on the acquired real-time process node identifier, performing traversal retrieval and logical matching in a preset supplementary lighting logic mapping table to obtain an original control command containing the target device address and the required brightness value; S200, based on the industrial fieldbus protocol standard, performing protocol header encapsulation and cyclic redundancy check code calculation on the original control command to obtain a serialized communication data packet; S300, after receiving the serialized communication data packet, performing terminal instruction parsing and validity verification on the serialized communication data packet to obtain a PWM duty cycle signal; S400, based on the PWM duty cycle signal, performing gate switching frequency modulation and inductor energy storage adjustment on the constant current drive circuit to obtain a constant drive current strictly corresponding to the duty cycle; S500, collecting the device operating parameters generated by the constant drive current and comparing them with a preset safety threshold to generate status feedback data for confirming the closed-loop control result.

[0033] In step S100, based on the acquired real-time process node identifier, a traversal search and logical matching is performed in a preset supplementary lighting logic mapping table to obtain the original control command containing the target device address and the required brightness value. It should be understood that existing industrial supplementary lighting solutions mostly adopt a constant-on mode or rely on manual switching. This control method, independent of the production process, not only leads to huge ineffective energy consumption during non-observation periods but also makes it difficult to ensure precise synchronization between supplementary lighting actions and rapidly changing automated production rhythms, easily missing critical reaction monitoring windows due to response lag. Therefore, in the technical solution of this application, based on the acquired real-time process node identifier, a traversal search and logical matching is performed in a preset supplementary lighting logic mapping table to obtain the original control command containing the target device address and the required brightness value. This establishes a digital linkage mechanism between lighting control and industrial automation processes, strictly constraining supplementary lighting behavior within a specific process time window. This ensures that the light source automatically turns on at optimal brightness only at necessary times, such as liquid level determination or reaction endpoint monitoring, thereby significantly reducing system energy consumption while significantly improving the effectiveness and consistency of visual monitoring data.

[0034] Specifically, in a concrete example of this application, the core of this process lies in transforming discrete production states into structured photoelectric control parameters through a lookup table mechanism. First, the control system monitors the production line's operational logic in real time. When a process switch is detected, it immediately generates a real-time process node identifier representing the current process state, such as a status ID generated for the reaction endpoint monitoring stage or the tank level settling stage in a reactor application scenario. Then, the system accesses a pre-stored preset supplementary lighting logic mapping table in memory. This table is essentially a database containing the correspondence between process node IDs, hardware physical addresses, and brightness parameters. The system uses the acquired real-time process node identifier as an index key to perform row-by-row traversal and logical comparison in the preset supplementary lighting logic mapping table. Once the real-time process node identifier successfully matches a preset condition in the table, the system locks the entry and extracts the associated target device address and the required brightness value for that process stage. For example, for the level determination stage, the system extracts the physical address of the corresponding window supplementary light and a 100% high brightness value; while for the routine inspection stage, it extracts a 50% low brightness value. Finally, the system combines and temporarily stores the two extracted key parameters to generate raw control instructions that are not encapsulated by the protocol, thus completing the mapping and transformation from the upper-level process logic to the lower-level equipment control data.

[0035] In step S200, based on the industrial fieldbus protocol standard, the original control commands are encapsulated with a protocol header and a cyclic redundancy check (CRC) code is calculated to obtain serialized communication data packets. It should be understood that industrial production sites are typically filled with complex electromagnetic interference generated by equipment such as frequency converters and high-power motors, and the wiring distance from the central control cabinet to each viewing window's supplementary lighting point is often long. Direct transmission of unprotected raw data is highly susceptible to signal attenuation or bit flipping, leading to command loss and malfunctions. Therefore, in the technical solution of this application, the original control commands are further encapsulated with a protocol header and a CRC code is calculated based on the industrial fieldbus protocol standard. This constructs a standardized transmission carrier with physical addressing capabilities and error detection mechanisms for discrete control parameters. This ensures that in a multi-node parallel bus network, control commands are only correctly identified and executed by the designated target device, thereby guaranteeing the communication reliability and control accuracy of the entire visual monitoring system under harsh operating conditions.

[0036] Specifically, in one example of this application, this process is executed by the communication protocol stack software module of the central controller. First, the system formats the raw control command containing the target device address and required brightness value according to a preset industrial fieldbus protocol specification (such as Modbus RTU protocol). A start character, function code (e.g., 0x06 indicating a write register operation), and data length identifier are added to the data header to complete the protocol header encapsulation. Then, the system uses the CRC-16 checksum algorithm, loads a preset generator polynomial, and performs continuous modulo-2 division operations on the encapsulated frame header and payload data to generate a 16-bit checksum. Finally, the system appends this checksum to the end of the data frame and converts the entire logical frame into a binary bit stream, thereby assembling a complete serialized communication data packet, which is then sent to the bus network through the physical communication interface.

[0037] In step S300, after receiving the serialized communication data packet, the serialized communication data packet is parsed and validated to obtain the PWM duty cycle signal. It should be understood that, since industrial fieldbuses typically employ a multi-node shared transmission medium topology, and industrial production environments are filled with complex electromagnetic interference, directly receiving data from the bus is highly susceptible to including redundant information destined for other devices or erroneous data due to signal attenuation. Therefore, in the technical solution of this application, after receiving the serialized communication data packet, the serialized communication data packet is further parsed and validated to obtain the PWM duty cycle signal. This allows for physical address filtering and data integrity screening of the received data stream at the device terminal level. This ensures that the integrated drive control unit only responds to legitimate commands sent to itself and outputs accurate drive signals based on verified control parameters, thereby preventing malfunctions or system failures caused by address conflicts or data tampering.

[0038] Specifically, in this embodiment of the application, after receiving the serialized communication data packet, the serialized communication data packet is parsed by the terminal instruction and its validity is verified to obtain the PWM duty cycle signal. This includes: deconstructing the address bit field of the serialized communication data packet and making a local hardware unique identifier logic decision to obtain the data frame to be verified; performing cyclic redundancy check calculation and payload data stripping on the data frame to be verified to obtain the decimal brightness control word; and performing time-domain signal conversion on the decimal brightness control word to obtain the PWM duty cycle signal.

[0039] More specifically, in a specific example of this application, the process is executed by an integrated drive control unit built into the intelligent ring light. It first receives the serialized communication data packet input by demodulation of the physical layer, and deconstructs the address field of the data packet according to the preset industrial bus protocol standard to extract the target device address information contained therein. Then, it performs a logical comparison and judgment between the target device address and the local hardware unique identifier stored in the local EEPROM or set by the DIP switch. If the address does not match, the data packet is directly discarded. If the address matches, the data packet is marked as a data frame to be verified and sent to the next level of processing buffer.

[0040] Next, the integrated drive control unit performs cyclic redundancy check (CRC) calculations on the data frame to be checked. It uses a preset generator polynomial to perform modulo-2 division on the frame header and payload data to generate a local checksum, which is then compared with the received checksum carried at the end of the frame. After confirming their consistency, the protocol frame header and checksum are stripped to extract the core payload data and convert it into a decimal brightness control word. Finally, to convert the discrete digital instructions into a time-domain control signal recognizable by the drive circuit, the integrated drive control unit performs time-domain signal conversion on the decimal brightness control word. This conversion process is based on a linear mapping model and incorporates dead-zone compensation and luminous efficacy correction, ultimately outputting a PWM duty cycle signal through calculation. The calculation logic used in the time-domain signal conversion process follows the following formula: ;in, The output PWM duty cycle signal represents the percentage of the power switch's on-time. The resulting decimal brightness control word is the brightness value in the original control command. The start-up dead-zone bias value is used to correct the starting voltage parameter of the LED driver circuit that fails to light up or has a non-linear response under low current. The maximum range value of the protocol defines the adjustable upper limit of the brightness command in the communication protocol; The minimum range value of the protocol defines the lower limit of the brightness command in the communication protocol; The luminous efficacy compensation coefficient is a dimensionless constant used to fine-tune the output power based on the current LED aging level or temperature characteristics. In the application scenario of intelligent ring lights, this calculation formula introduces a startup dead-zone bias value. The system eliminates the "dead lamp" phenomenon caused by insufficient driving voltage in linear light-emitting components at low grayscale values, ensuring continuous low-brightness supplemental lighting; and introduces a luminous efficacy compensation coefficient. This allows the system to fine-tune the PWM duty cycle signal according to the hardware characteristics, ensuring that the final output light intensity maintains a strict linear correspondence with the preset brightness value in the industrial control sequence, thereby realizing the high-precision supplementary lighting control required for industrial visual monitoring.

[0041] In step S400, based on the PWM duty cycle signal, the gate switching frequency of the constant current drive circuit is modulated and the inductor energy storage is adjusted to obtain a constant drive current that strictly corresponds to the duty cycle. It should be understood that, since linear light-emitting components are essentially current-driven nonlinear loads, their current-voltage characteristics exhibit a steep exponential characteristic. Even small fluctuations in the supply voltage can cause drastic changes in the current flowing through the device, leading to brightness flickering or even thermal runaway. Furthermore, the original logic level signal output by the integrated drive control unit cannot directly drive the power stage switching device in terms of voltage amplitude and driving capability. Therefore, in the technical solution of this application, the gate switching frequency of the constant current drive circuit is further modulated and the inductor energy storage is adjusted based on the PWM duty cycle signal to obtain a constant drive current that strictly corresponds to the duty cycle. This constructs a precision energy conversion stage from weak current logic control to strong current power output, and linearly converts the duty cycle information of the digital instruction into an analog current amplitude. This ensures that the intelligent ring light always outputs a stable light intensity that precisely matches the industrial control sequence commands, even under power fluctuations or changes in ambient temperature in the industrial environment, completely eliminating flicker interference and brightness drift during the window lighting process.

[0042] Specifically, in this embodiment, based on the PWM duty cycle signal, the constant current drive circuit is subjected to gate switching frequency modulation and inductor energy storage adjustment to obtain a constant drive current that strictly corresponds to the duty cycle. This includes: performing level shifting and edge steepening processing on the PWM duty cycle signal to obtain the power switch gate voltage; and based on the power switch gate voltage, performing chopping control on the switching transistor in the buck circuit and performing closed-loop current stabilization operation on the energy release process in the inductor through an error amplification feedback mechanism to obtain a constant drive current.

[0043] More specifically, in a particular example of this application, the process is first executed by the pre-drive stage within the integrated drive control unit. This stage receives a low-voltage logic-level PWM duty cycle signal (e.g., 3.3V) from the microcontroller and amplifies its voltage amplitude to a threshold range (e.g., 10V to 15V) sufficient to fully turn on the power MOSFET via a push-pull amplifier or level shifting circuit. Simultaneously, the rising and falling edges of the signal are shaped to reduce switching losses, resulting in a steeply waveformd power switch gate voltage. This power switch gate voltage is then applied to the gate of the main switch in the buck constant current drive circuit, controlling it to perform high-frequency chopping. When the switch is on, the input power supply charges the inductor and stores magnetic energy; when the switch is off, the inductor releases energy through a freewheeling diode to maintain continuous current. During this process, an error amplifier within the circuit continuously samples the voltage drop across the sampling resistor connected in series in the loop and compares it with a reference voltage adjusted based on the PWM duty cycle, dynamically adjusting the on-time of the switch to lock the output current. To quantify this control process, the magnitude of the constant drive current follows the calculation model below: ;in, The driving current is constant, which is the average DC current that is ultimately output to the linear light-emitting component; This is the PWM duty cycle signal, i.e., the input dimming ratio coefficient; It serves as a reference voltage and is a high-precision voltage source inside the driver chip; The resistance value of the current sampling resistor is a key sensing element in the hardware feedback loop; Let be the inductor current ripple coefficient, a dimensionless parameter characterizing current fluctuations. In the control logic of the intelligent ring-shaped supplementary light, the numerator term of this calculation formula... This characterizes how the system uses a digitized PWM duty cycle signal to dynamically modulate the analog domain reference voltage. This means that the brightness command issued by the industrial controller directly determines the target reference for current regulation, realizing the logical mapping of industrial control sequence drive; the terms in the denominator of the formula This reflects the hardware physical constraints constituted by the resistance value of the current sampling resistor and the characteristics of the magnetic components. It ensures that regardless of fluctuations in the input power supply voltage, as long as the hardware parameters are determined, the output constant drive current remains constant. Only with control commands It exhibits a strict linear proportional relationship, thereby ensuring the consistency and repeatability of illumination in precision industrial visual inspection scenarios.

[0044] In step S500, the operating parameters of the equipment generated by the constant drive current are collected and compared with a preset safety threshold to generate status feedback data for confirming the closed-loop control results. It should be understood that industrial environments are often accompanied by harsh factors such as vibration, high temperatures, and electromagnetic interference. Relying solely on unidirectional open-loop control commands cannot ensure that the remote supplementary lighting equipment has performed the expected light-emitting action, nor can it promptly detect hardware faults that may pose fire hazards, such as LED open circuits, short circuits, or overheating. Therefore, in the technical solution of this application, the operating parameters of the equipment generated by the constant drive current are collected and compared with a preset safety threshold to generate status feedback data for confirming the closed-loop control results, thereby constructing a two-way information verification mechanism from the physical layer to the logic control layer. This ensures that the central control system can monitor the actual health status and execution results of each window supplementary lighting node in real time, thereby immediately triggering fuse protection or alarm procedures in case of abnormalities, significantly improving the safety and reliability of the automated monitoring system.

[0045] Specifically, in one example of this application, the process is executed by the monitoring subsystem within the integrated drive control unit, which is implemented through the coordinated operation of hardware sampling and software logic. First, the integrated drive control unit utilizes physical sensors (such as sampling resistors connected in series in the main circuit and NTC thermistors attached to the surface of the aluminum substrate) placed at key nodes of the circuit to sense in real time the physical effects generated when a constant drive current flows through the load. The acquired analog voltage signal is then quantized by an analog-to-digital converter into device operating parameters containing real-time current values ​​and junction temperature data. Subsequently, the microcontroller calls a preset safety threshold (which includes the maximum allowable current limit and over-temperature protection trigger point) stored in non-volatile memory and compares the device operating parameters item by item using digital comparator logic. If the parameters are detected to be within the safe range, the control is considered successful; if the parameters exceed the threshold, a fault state is identified, and the protection mechanism is triggered. Finally, based on the interpretation results, the current operating values ​​or fault codes are encoded and packaged according to the format requirements of the industrial bus protocol to generate status feedback data containing device status words and check bits. This data is then sent back to the central industrial control PLC via the industrial communication interface module, thus completing a complete closed-loop control confirmation.

[0046] In summary, the intelligent ring-shaped supplementary light according to the embodiments of this application is explained. It solves the problems of difficult installation on complex curved tank surfaces and interference from surface reflections by constructing a magnetic ring-shaped supplementary light structure adapted to the window contour and utilizing a magnetic adsorption array in conjunction with a soft light component. Simultaneously, the solution establishes an intelligent response mechanism based on industrial control sequences. It receives real-time process node identifiers through an industrial communication interface, analyzes and generates precise PWM control signals, and drives the light source to output constant soft light during specific reaction stages. This closed-loop logic not only eliminates the limitations of the dark environment inside the container on visual monitoring but also achieves deep coupling between the supplementary light action and the automated production process, effectively overcoming the shortcomings of traditional manual or constantly lit light sources, such as high energy consumption, slow response, and lack of linkage.

[0047] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An intelligent ring-shaped fill light, characterized in that, include: A ring-shaped support frame, with a ring-shaped groove recessed along the circumference on the front side of the ring-shaped support frame. A linear light-emitting component is embedded in an annular mounting groove; A soft light diffuser is placed over the opening of the annular mounting slot and fixed to the front end of the annular support frame. Magnetic adsorption array, the magnetic adsorption array is uniformly embedded in the mounting holes on the back of the annular support frame; An integrated drive control unit is located in an electrical compartment reserved inside the annular support frame, and the linear light-emitting component is electrically connected to the integrated drive control unit through internal wires.

2. The intelligent ring-shaped supplementary light according to claim 1, characterized in that, The front end of the diffuser is sealed to the annular support frame by interference fit or sealant.

3. The intelligent ring-shaped supplementary light according to claim 1, characterized in that, It also includes anti-slip cushioning washers, which are attached to the back surface of the annular support frame and cover or surround the magnetic adsorption array.

4. The intelligent ring-shaped supplementary light according to claim 1, characterized in that, The linear light-emitting component is embedded in the inner bottom surface of the annular mounting groove and is fixedly connected to the bottom of the groove by thermally conductive adhesive or mechanical clips.

5. The intelligent ring-shaped supplementary light according to claim 1, characterized in that, It also includes an industrial communication interface module and a power input interface. Both the industrial communication interface module and the power input interface are installed on the outer wall or back of the ring support frame, and both are electrically connected to the internal integrated drive control unit.

6. A control method for the intelligent ring-shaped supplementary light as described in claims 1 to 5, characterized in that, include: Based on the acquired real-time process node identifier, a traversal search and logical matching is performed in the preset supplementary lighting logic mapping table to obtain the original control command containing the target device address and the required brightness value. Based on the industrial fieldbus protocol standard, the original control commands are encapsulated with protocol headers and cyclic redundancy check codes are calculated to obtain serialized communication data packets. After receiving the serialized communication data packet, the terminal instruction is parsed and the validity is verified to obtain the PWM duty cycle signal. Based on the PWM duty cycle signal, the gate switching frequency of the constant current drive circuit is modulated and the inductor energy storage is adjusted to obtain a constant drive current that strictly corresponds to the duty cycle. The system collects equipment operating parameters generated by a constant drive current and compares them with preset safety thresholds to generate state feedback data for confirming the closed-loop control results.

7. The control method for the intelligent ring-shaped supplementary light according to claim 6, characterized in that, After receiving the serialized communication data packet, the terminal command is parsed and its validity is verified to obtain the PWM duty cycle signal, including: The serialized communication data packet is destructured by address bit field and logically judged by local hardware unique identifier to obtain the data frame to be verified; Cyclic redundancy check calculations are performed on the data frame to be checked, and the payload data is stripped to obtain the decimal brightness control word. The decimal brightness control word is converted into a time-domain signal to obtain the PWM duty cycle signal.

8. The control method for the intelligent ring-shaped supplementary light according to claim 6, characterized in that, Based on the PWM duty cycle signal, the constant current drive circuit is modulated by the gate switching frequency and the inductor energy storage is adjusted to obtain a constant drive current that strictly corresponds to the duty cycle, including: Level shifting and edge steepening of the PWM duty cycle signal are performed to obtain the power switch gate voltage; Based on the gate voltage of the power switch, the switching transistor in the buck circuit is chopper controlled, and the energy release process in the inductor is closed-loop stabilization operation is performed through an error amplification feedback mechanism to obtain a constant drive current.

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