A kind of wire coating paint photocuring equipment integrated light intensity closed loop control system

Abstract

The present application relates to the technical field of ultraviolet photodetection and silk covered wire production, and discloses a silk covered wire paint photocuring equipment based on a light intensity closed-loop control system, aiming to solve the technical problem of unstable paint curing quality caused by the lack of light intensity monitoring and automatic feedback regulation function of the existing silk covered wire paint photocuring equipment. The light intensity closed-loop control system is mainly composed of a control module, an ultraviolet light source, a light source driving module and a beta-Ga2O3 / mCP heterojunction ultraviolet photodetector prepared by the present application. The beta-Ga2O3 / mCP heterojunction ultraviolet photodetector can collect the ultraviolet light intensity signal in the photocuring cavity in real time and transmit it to the control module. After the control module processes the light intensity signal, it outputs the corresponding control signal to the light source driving module, and then dynamically adjusts the light intensity of the ultraviolet light source, realizing the closed-loop feedback control of light intensity. The present application can effectively improve the curing quality of silk covered wire paint and has good practicality and industrialization promotion value.

Description

Technical Field

[0001] This invention relates to the fields of ultraviolet photoelectric detection technology and wire-covered production technology, specifically to a wire-covered paint photocuring device based on a light intensity closed-loop control system. Background Technology

[0002] Silk-covered wire is a type of electromagnetic wire whose conductor is wrapped with natural silk or fiber filaments (such as nylon, polyester fiber, natural silk, self-adhesive filaments, etc.) as an insulation layer. It is widely used in electrical equipment such as motors and transformers. In the production process of silk-covered wire, the paint curing is a crucial step that determines the product's insulation performance, temperature resistance, mechanical strength, and service life. Traditional methods of paint curing for silk-covered wire involve heat treatment and drying, requiring multiple turns of the coated wire for repeated drying. This process is not only time-consuming and inefficient but also energy-intensive. Furthermore, repeated winding can damage the conductor's compressive strength and bending stress, leading to a decline in the quality of the silk-covered wire product.

[0003] With the rapid development of photocuring technology, ultraviolet (UV) curing has gradually replaced traditional heat treatment and drying, becoming the mainstream process for curing varnish on silk-covered wire. UV curing offers significant advantages such as fast curing speed, low energy consumption, environmental friendliness, and minimal damage to the conductor. Its core principle is to use UV light to irradiate the coated silk-covered wire, causing the photoinitiator in the varnish to decompose and generate free radicals, triggering a resin polymerization reaction, thereby achieving rapid curing of the varnish. The most commonly used UV wavelengths are 365nm and 395nm. The stability of the UV light intensity directly determines the quality of the varnish curing. Excessive light intensity leads to overly rapid curing, resulting in surface defects such as cracks, blistering, and embrittlement; insufficient light intensity leads to incomplete curing, causing adhesion, peeling, and substandard insulation performance, severely affecting the product qualification rate of silk-covered wire.

[0004] Existing photocuring equipment has obvious defects: the light intensity cannot be monitored and adjusted in real time, the light intensity will decay during the use of the light source, and the light intensity is unstable due to factors such as ambient temperature and dust adhesion. This results in uneven curing of the paint on the cable surface, with some areas being under-cured and others being over-cured, which affects the insulation performance and appearance quality of the wire. Summary of the Invention

[0005] To address the significant shortcomings of existing UV curing equipment for wire coatings, this invention employs an organic p-type semiconductor mCP (1,3-bis(9-carbazolyl)benzene, with the chemical formula C... 30 H 20Using N2 (with a band gap of approximately 3.1 eV) as the light absorption layer, and combining it with the inorganic n-type semiconductor β-Ga2O3 (β-phase gallium oxide), a β-Ga2O3 / mCP heterojunction ultraviolet photodetector is constructed for real-time monitoring of ultraviolet light intensity changes during the photocuring process. Based on this, a wire coating paint photocuring device with a closed-loop light intensity control system is designed. The core feature of this device is that when the ultraviolet light intensity fluctuates during the photocuring process, it can automatically feedback and adjust the light intensity, promptly correcting the light intensity fluctuations to ensure uniform paint curing on the wire surface, thereby improving the insulation performance, mechanical properties, and appearance quality of the wire.

[0006] To address the aforementioned problems in the existing technology, this invention provides a laser curing device for silk-covered wire paint based on a closed-loop light intensity control system, which has the advantages of stable and controllable light intensity, uniform curing effect, high monitoring accuracy, and high energy utilization.

[0007] To achieve the above objectives.

[0008] Furthermore, the control module can preset a light intensity threshold. When the light intensity signal collected by the ultraviolet photodetector is lower than the preset light intensity threshold, the control module controls the light source driving module to increase the luminous intensity of the ultraviolet light source; when the light intensity signal is higher than the preset light intensity threshold, the control module controls the light source driving module to decrease the luminous intensity of the ultraviolet light source, thereby achieving constant light intensity control.

[0009] Furthermore, the equipment enclosure is a cuboid structure with an inspection door on the front and a heat dissipation grille on the side, and a cooling fan is installed inside the heat dissipation grille.

[0010] The top of the equipment housing is equipped with an audible and visual alarm, which is electrically connected to the control module. When the ultraviolet photodetector malfunctions and has no signal output, or when the collected light intensity signal exceeds the preset light intensity threshold range for 10 seconds, the control module controls the audible and visual alarm to issue an audible and visual alarm.

[0011] Furthermore, the fabrication method of the ultraviolet photodetector specifically includes the following steps:

[0012] Step 1: Sapphire substrate pretreatment; The sapphire substrate is ultrasonically cleaned with acetone, ethanol and deionized water for 10-20 minutes in sequence, and then placed in a vacuum drying oven and dried at 100-150℃ for 30-50 minutes to remove surface impurities and moisture.

[0013] Step 2: Deposit a β-Ga2O3 thin film on the pretreated sapphire substrate using PECVD; use liquid gallium metal as gallium source, argon as carrier gas with a flow rate controlled at 70-100 sccm, oxygen as reactant gas with a flow rate controlled at 4-7 sccm, deposition temperature controlled at 800-1000℃, RF power controlled at 120-200W, and deposition time controlled at 25-65min;

[0014] Step 3: Prepare mCP thin films on the surface of β-Ga2O3 films by spin coating; dissolve mCP powder in chlorobenzene to prepare mCP solutions with a mass concentration of 5-10 mg / mL, and spin coat the solutions using a spin coater with a spin coating speed of 3000-5000 r / min and a spin coating time of 30-60 s. After spin coating, anneal the solutions in an inert gas atmosphere at 100-120℃ for 10-15 min.

[0015] Step 4: Prepare a transparent conductive graphene layer on the mCP film using a solution method; using natural graphite powder as raw material and N-methylpyrrolidone as solvent, after ultrasonication at 40kHz and 300W in an ice bath for 4-6 hours and centrifugation at 3000-5000r / min for 30 minutes, a few-layer graphene dispersion of 0.5-1mg / mL is obtained. After filtration, spin-coating is performed on the surface of the mCP film at 3000-5000r / min for 30-60s. After vacuum drying at 60-80℃ for 30-40 minutes, the film is annealed at 80-100℃ in a nitrogen atmosphere for 1-3 hours.

[0016] Step 5: A Ti / Au electrode is sputtered onto the β-Ga₂O₃ thin film surface and an Ag electrode is sputtered onto the graphene surface using magnetron sputtering. The sputtering power is 80-150W, and the sputtering time is 10-25 minutes. The Ti / Au and Ag electrodes are then encapsulated using quartz glass, with dimensions matching those of the sapphire substrate.

[0017] Compared with the prior art, the present invention provides a UV curing device for coated wire paint based on a closed-loop light intensity control system, which has the following advantages:

[0018] 1. This invention, through the setting of a closed-loop light intensity control system, can automatically adjust the light intensity fluctuations during the photocuring process. The ultraviolet photodetector collects the light intensity signal in real time, and the control module precisely processes and controls the light source drive module to adjust the power of the ultraviolet light source, ensuring that the light intensity in the photocuring chamber is stable at the preset threshold. This effectively solves the problems of insufficient or excessive curing of paint caused by light intensity fluctuations in existing equipment, and improves the quality stability of wire-wrapped products.

[0019] 2. This invention employs a β-Ga2O3 / mCP heterojunction ultraviolet photodetector. Compared to traditional silicon-based detectors, it does not require additional complex filtering devices, has high detection sensitivity, and strong anti-interference capabilities. It can accurately acquire light intensity signals within the photopolymerization cavity, providing reliable data support for closed-loop control and ensuring the accuracy of light intensity regulation. At the same time, the fabrication method of the detector is clearly defined, with clear steps and reasonable parameters, facilitating industrial production.

[0020] 3. The present invention sets a nano-silver reflective layer on the inner wall of the photocuring cavity, which can effectively reflect ultraviolet light, reduce light scattering and loss, improve light utilization, and reduce energy consumption; the ultraviolet light source is evenly distributed along the cavity axis, and combined with the positioning function of the inlet and outlet channels for the cable, it can ensure that the paint on the cable surface is cured evenly and avoid the occurrence of curing dead corners.

[0021] 4. This invention integrates temperature monitoring and heat dissipation functions. The control module automatically adjusts the working status of the cooling fan according to the temperature signal to avoid high temperature affecting the stability of equipment operation and the quality of paint curing, thereby extending the service life of the equipment.

[0022] 5. The light intensity threshold of this invention can be flexibly adjusted to adapt to the curing requirements of different types of wire and different paint types, making it highly versatile; the touch screen can display the equipment operating parameters in real time, which is convenient for operators to monitor and operate, improving the practicality and convenience of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the photocuring cavity of the present invention.

[0025] Figure 3 This is a schematic diagram of the β-Ga2O3 / mCP heterojunction ultraviolet photodetector device of the present invention.

[0026] Figure 4 This is a cross-sectional SEM image of the β-Ga2O3 / mCP heterojunction ultraviolet photodetector device of the present invention.

[0027] Figure 5 This invention relates to the photoelectric performance testing of the β-Ga2O3 / mCP heterojunction ultraviolet photodetector device.

[0028] Figure 6 This is a block diagram of the light intensity closed-loop control system of the present invention.

[0029] In the diagram: 10. Equipment enclosure; 101. Inspection door; 102. Heat dissipation grille; 103. Inlet channel; 104. Outlet channel; 20. Photocuring chamber; 201. Reflective layer; 30. Ultraviolet photodetector; 40. Light source drive module; 41. Ultraviolet light source; 50. Control module; 60. Audible and visual alarm. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 and 2 As shown, a UV curing device for coated wire paint based on a light intensity closed-loop control system includes a device housing 10, a UV curing chamber 20 fixed inside the housing 10, and a light intensity closed-loop control system inside the housing 10. The light intensity closed-loop control system includes an ultraviolet photodetector 30, an ultraviolet light source 41, a control module 50, and a light source drive module 40. The control module 50 and the light source drive module 40 are installed on the front of the housing 10, an audible and visual alarm 60 is installed on the top, and inlet channel 103, outlet channel 104, and heat dissipation grille 102 are installed on both sides. The control module 50 is specifically a touch screen with an embedded microcontroller, and a cooling fan is installed inside the heat dissipation grille 102. All components work together to ensure stable operation of the equipment.

[0032] In this embodiment, the ultraviolet photodetector 30 is used to collect real-time light intensity signals near the surface of the wire inside the photocuring cavity 20, and convert the light intensity signals into electrical signals and transmit them to the control module 50; the light source driving module 40 is used to receive adjustment commands and adjust the output power of the ultraviolet light source 41; the ultraviolet light source 41 is fixed to the inner wall of the photocuring cavity 20 and is used to emit ultraviolet light to achieve photocuring of the paint on the surface of the wire; the control module 50 is used to receive real-time light intensity signals, compare and analyze them with preset light intensity thresholds, and output corresponding power adjustment commands.

[0033] In this embodiment, the photocuring cavity 20 is a hollow cylindrical structure with a cable inlet and a cable outlet at both ends. The inlet channel 103 and the outlet channel 104 are coaxially aligned with the photocuring cavity 20 to support the smooth passage of the silk-covered wire. The inner wall is coated with a 10μm nano-silver coating as a reflective layer 201 with a reflectivity ≥96%, which can effectively reflect ultraviolet light and improve light utilization.

[0034] Furthermore, the ultraviolet light source 41 employs a 365nm wavelength ultraviolet LED lamp, with a spacing of 25mm between adjacent ultraviolet LED lamps, uniformly distributed along the axial direction of the inner wall of the curing cavity 20 to ensure uniform light intensity distribution within the cavity. The ultraviolet photodetector 30 is installed at the central axis of the curing cavity 20, near the cable inlet side, and offset from the ultraviolet light source 41 to avoid direct light interference with detection accuracy. It can accurately capture real-time light intensity fluctuations on the surface of the wire, ensuring the timeliness and accuracy of closed-loop adjustment.

[0035] In this embodiment, the microcontroller inside the control module 50 is an STM32F103 series microcontroller, and its internal preset light intensity threshold can be adjusted via an external touch screen. In this embodiment, the preset light intensity threshold is 120mW / cm². The light source driving module 40 adopts a constant current driving circuit, and the output current adjustment range is 0.1-1.0A, which can realize continuous adjustment of the output power of the ultraviolet light source 41. The ultraviolet photodetector 30, temperature sensor, and cooling fan are all electrically connected to the control module 50. The light source driving module 40 is electrically connected to the control module 50 and the ultraviolet light source 41 respectively, forming a complete closed-loop control and monitoring system.

[0036] In this embodiment, the audible and visual alarm 60 is electrically connected to the control module 50. When the ultraviolet photodetector 30 malfunctions and has no signal output, or when the collected light intensity signal exceeds the preset light intensity threshold range for 10 seconds, the control module 50 controls the audible and visual alarm 60 to issue an audible and visual alarm. The audible and visual alarm can promptly remind operators of equipment abnormalities, avoiding quality problems in the curing of the wire due to abnormal light intensity and reducing production losses.

[0037] In this embodiment, the ultraviolet photodetector 30 is a β-Ga2O3 / mCP heterojunction ultraviolet photodetector, which uses an organic p-type semiconductor mCP (1,3-bis(9-carbazolyl)benzene, with the chemical formula C 30 H 20 Using N2 (with a band gap of approximately 3.1 eV) as the light absorption layer, the light absorption cutoff wavelength corresponding to the 3.1 eV band gap is 400 nm, which perfectly matches the photocuring wavelength (365-395 nm) of this invention. Further combined with the inorganic n-type semiconductor β-Ga2O3 (β-phase gallium oxide), a β-Ga2O3 / mCP heterojunction ultraviolet photodetector is constructed. Compared with traditional silicon-based detectors, it can filter out visible light interference without the need for complex filtering devices, has high detection sensitivity and strong anti-interference ability, and can accurately collect the light intensity signal in the photocuring cavity, providing reliable data support for closed-loop control.

[0038] The fabrication process of the ultraviolet photodetector 30 was strictly carried out according to the preset steps:

[0039] Step 1: First, the sapphire substrate is pretreated by ultrasonically cleaning it with acetone, ethanol and deionized water for 15 minutes in sequence to remove surface oil, impurities and moisture. Then, it is placed in a vacuum drying oven and dried at 120°C for 35 minutes to ensure that the substrate surface is dry and clean, laying the foundation for subsequent thin film deposition.

[0040] Step 2: Subsequently, a β-Ga2O3 thin film was deposited on the pretreated sapphire substrate using the PECVD method. Liquid gallium with a purity ≥99.99% was used as the gallium source, argon was used as the carrier gas with a flow rate controlled at 80 sccm, oxygen was used as the reactant gas with a flow rate controlled at 5 sccm, the deposition temperature was controlled at 850℃, and the deposition time was 60 min.

[0041] Step 3: Next, half of the β-Ga2O3 film surface is covered with a mask, and an mCP film is prepared on the other half of the β-Ga2O3 film surface using spin coating. The mCP powder is dissolved in chlorobenzene to prepare an mCP solution with a mass concentration of 7 mg / mL. Spin coating is performed using a spin coater at a speed of 3000 r / min for 30 s. After spin coating, the solution is annealed in a nitrogen atmosphere at 120℃ for 15 min. The mCP film serves as the light absorption layer of the β-Ga2O3 / mCP heterojunction ultraviolet photodetector.

[0042] Step 4: Then, a transparent conductive graphene layer was prepared on the mCP film using a solution method (liquid phase exfoliation + spin coating). Using natural graphite powder as raw material and N-methylpyrrolidone as solvent, a graphene dispersion of 0.5 mg / mL was obtained after ultrasonication at 40 kHz and 300 W in an ice bath for 5 h, followed by centrifugation at 5000 r / min for 30 min. After filtration, the dispersion was spin-coated onto the mCP film surface at 3000 r / min for 30 s. After vacuum drying at 80 °C for 30 min, the film was annealed at 90 °C in a nitrogen atmosphere for 2 h. The transparent conductive graphene layer exhibits high electron mobility and high light transmittance, and its introduction can significantly enhance the photoelectric performance of the detector.

[0043] Step 5: Finally, using an electrode mask, a Ti / Au electrode is sputtered onto the β-Ga2O3 thin film surface and an Ag electrode is sputtered onto the graphene surface using magnetron sputtering. The sputtering power is 120W and the sputtering time is 15min. The Ti / Au and Ag electrodes are then encapsulated using quartz glass, with dimensions matching those of the sapphire substrate.

[0044] The β-Ga2O3 / mCP heterojunction ultraviolet photodetector can be prepared through the above experimental steps. The device structure is as follows: Figure 3 As shown, from bottom to top, it includes a sapphire substrate, a β-Ga2O3 thin film layer, an mCP thin film layer, a graphene layer, a top metal electrode, and a quartz glass layer as a protective layer.Figure 4 As shown, the thicknesses of the β-Ga₂O₃ thin film and the mCP thin film are 1.61 μm and 0.13 μm, respectively. The photoelectric performance of the detector was tested as follows: Figure 5 As shown, under a 0.5V bias voltage and 365nm ultraviolet illumination, the photocurrent of the device monotonically increases with increasing light intensity. The block diagram of the light intensity closed-loop control system built based on this ultraviolet photodetector is shown below. Figure 6 As shown.

[0045] The working principle of this device is as follows:

[0046] 1. Before starting the equipment, the operator sets the preset light intensity threshold (120mW / cm² in this embodiment) and temperature threshold (80℃) through the external touch screen of the control module 50, and checks the connection status of each component to ensure that the equipment is running normally;

[0047] 2. The coated silk-covered wire is pulled to the inlet channel 103 of the equipment box 10 by the support wheel, passes through the cable inlet and cable outlet of the light curing chamber 20, and finally exits from the outlet channel 104 of the equipment box. Ensure that the cable is located at the central axis of the light curing chamber 20. The inlet and outlet channels play a role in positioning and guiding the cable to prevent the cable from deviating.

[0048] 3. Start the equipment. The control module 50 controls the light source drive module 40 to start the ultraviolet light source 41. The ultraviolet light source 41 emits ultraviolet light to perform a light curing operation on the paint on the surface of the wire. The reflective layer on the inner wall of the light curing chamber 20 reflects the ultraviolet light, reducing light loss and improving light utilization.

[0049] 4. The ultraviolet photodetector 30 collects the ultraviolet light intensity signal inside the photocuring cavity 20 in real time, converts the light intensity signal into an electrical signal, and transmits it to the control module 50. The control module 50 compares and analyzes the received electrical signal with a preset light intensity threshold (120mW / cm²).

[0050] (1) If the collected light intensity signal is lower than 120mW / cm², it indicates that the light intensity is insufficient. The control module 50 sends a power increase command to the light source drive module 40. The light source drive module 40 adjusts the output current to increase, thereby increasing the output power of the ultraviolet light source 41 and increasing the light intensity inside the cavity until the preset threshold is reached.

[0051] (2) If the collected light intensity signal is higher than 120mW / cm², it indicates that the light intensity is too high. The control module 50 sends a power reduction command to the light source drive module 40. The light source drive module 40 adjusts the output current to reduce the output power of the ultraviolet light source 41, thereby reducing the light intensity inside the cavity until the preset threshold is reached.

[0052] 5. The temperature sensor collects the temperature signal inside the equipment enclosure 10 in real time and transmits the temperature signal to the control module 50. The control module 50 processes the temperature signal.

[0053] (1) When the temperature is below 60℃, the cooling fan is off and the equipment operates normally;

[0054] (2) When the temperature is between 60-80℃, the control module 50 controls the cooling fan to start and perform normal heat dissipation to ensure the internal temperature of the equipment is stable;

[0055] (3) When the temperature exceeds 80℃, the control module 50 controls the cooling fan to increase its speed and enhance heat dissipation until the temperature drops below 80℃, so as to avoid the high temperature from affecting the curing quality of the paint and the life of the equipment components;

[0056] 6. The touch screen displays the light intensity, temperature and output power of the ultraviolet light source 41 in the light curing chamber 20 in real time. Operators can monitor the equipment's operating status in real time and stop the machine for inspection in time if any abnormality occurs.

[0057] 7. After the light curing is completed, the operator turns off the equipment, and the control module 50 controls the ultraviolet light source 41 and the cooling fan to stop working. The cured silk-covered wire is wound and rolled up by the winding device. At this point, the entire light curing operation is completed.

[0058] In this embodiment, through the automatic adjustment of the light intensity closed-loop control system, the light intensity inside the curing chamber 20 is always stable at around 120mW / cm², resulting in uniform curing of the paint on the surface of the wire, without defects such as stickiness, cracking, or peeling, thus significantly improving product quality. The β-Ga2O3 / mCP heterojunction ultraviolet photodetector 30 has high sensitivity and strong anti-interference ability, ensuring the accuracy of light intensity regulation. The reflective layer greatly improves light utilization and effectively reduces energy consumption. The integration of temperature monitoring and heat dissipation functions significantly improves the stability of equipment operation and extends its service life.

[0059] Furthermore, the present invention can flexibly adjust the preset light intensity threshold according to the curing requirements of different types of wire and different paint types, and has strong adaptability; the preparation method of the β-Ga2O3 / mCP heterojunction ultraviolet photodetector is simple and the parameters are reasonable, which facilitates industrial production and can be applied on a large scale to the photocuring production of wire coating.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A UV curing device for coated wire paint based on a closed-loop light intensity control system, characterized in that: It includes an equipment housing (10), a light curing chamber (20), and a light intensity closed-loop control system; the light curing chamber (20) is detachably embedded inside the equipment housing (10) and is sealed to the equipment housing (10); the light intensity closed-loop control system is integrated inside the equipment housing (10) and works in conjunction with the light curing chamber (20) to automatically adjust the light intensity fluctuations during the light curing process, thereby achieving precise and constant control of the light intensity during light curing.

2. The UV curing equipment for coated wire paint based on a closed-loop light intensity control system according to claim 1, characterized in that, The light intensity closed-loop control system includes: An ultraviolet photodetector (30) is used to collect real-time light intensity signals near the surface of the wire inside the photocuring cavity (20) and convert the light intensity signals into electrical signals to be transmitted to the control module (50). The light source driving module (40) is used to receive adjustment commands and adjust the output power of the ultraviolet light source (41); Ultraviolet light source (41), the ultraviolet light source (41) is fixed to the inner wall of the photocuring cavity (20) and is used to emit ultraviolet light to achieve photocuring of the paint on the surface of the wire; Control module (50); The control module (50) is used to receive real-time light intensity signals, compare and analyze them with preset light intensity thresholds, and output corresponding power adjustment commands.

3. The UV curing equipment for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The photocuring cavity (20) is a hollow cylindrical structure with a sealed inlet channel (103) and an outlet channel (104) at both ends. The inlet channel (103) and outlet channel (104) are coaxial with the photocuring cavity (20) and are used to support the smooth passage of the wire. The inner wall of the photocuring cavity (20) is coated with a high reflective layer (201).

4. The UV curing equipment for coated wire paint based on a closed-loop light intensity control system according to claim 3, characterized in that: The high reflectivity reflective layer (201) is a nano-silver coating with a thickness of 8-22μm and a reflectivity of ≥96%, which can improve light utilization and reduce energy consumption.

5. A UV curing device for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The ultraviolet light source (41) adopts a matrix ultraviolet LED lamp group with an emission wavelength of 365-395nm. The surface of the lamp group is provided with a quartz dust cover to avoid paint residue from contaminating the light source. The light source driving module (40) adopts a constant current and constant voltage composite driving method.

6. The UV curing equipment for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The ultraviolet photodetector (30) is installed at the central axis of the photocuring cavity (20) and is biased towards the wire inlet side. The probe of the ultraviolet photodetector (30) faces the inner wall of the photocuring cavity (20), which can accurately capture the real-time light intensity fluctuations on the surface of the wire, ensuring the timeliness and accuracy of closed-loop adjustment.

7. A UV curing device for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The control module (50) is located on the front of the equipment housing (10), specifically a touch screen with an embedded microcontroller, used to preset the light intensity threshold and display the real-time light intensity in the light curing cavity (20), the power of the ultraviolet light source (41), and other operating parameters, so that the operator can monitor the equipment operating status in real time.

8. A UV curing device for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The control module (50) can preset a light intensity threshold. When the light intensity signal collected by the ultraviolet photodetector (30) is lower than the preset light intensity threshold, the control module (50) controls the light source driving module (40) to increase the luminous intensity of the ultraviolet light source (41). When the light intensity signal is higher than the preset light intensity threshold, the control module (50) controls the light source driving module (40) to decrease the luminous intensity of the ultraviolet light source (41), thereby achieving constant light intensity control.

9. A UV curing device for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that: The equipment enclosure is a cuboid structure with an inspection door (101) on the front and a heat dissipation grille (102) on the side. A cooling fan is installed inside the heat dissipation grille (102). The top of the equipment housing (10) is equipped with an audible and visual alarm (60), which is electrically connected to the control module (50). When the ultraviolet photodetector (30) malfunctions and has no signal output, or when the collected light intensity signal exceeds the preset light intensity threshold range for 10 seconds, the control module (50) controls the audible and visual alarm (60) to issue an audible and visual alarm.

10. A UV curing device for coated wire paint based on a closed-loop light intensity control system according to claim 2, characterized in that, The preparation method of the ultraviolet photodetector (30) specifically includes the following steps: Step 1: Sapphire substrate pretreatment; The sapphire substrate is ultrasonically cleaned with acetone, ethanol and deionized water for 10-20 minutes in sequence, and then placed in a vacuum drying oven and dried at 100-150℃ for 30-50 minutes to remove surface impurities and moisture. Step 2: Deposit a β-Ga2O3 thin film on the pretreated sapphire substrate using PECVD; use liquid gallium metal as gallium source, argon as carrier gas with a flow rate controlled at 70-100 sccm, oxygen as reactant gas with a flow rate controlled at 4-7 sccm, deposition temperature controlled at 800-1000℃, RF power controlled at 120-200W, and deposition time controlled at 25-65min; Step 3: Prepare mCP thin films on the surface of β-Ga2O3 films by spin coating; dissolve mCP powder in chlorobenzene to prepare mCP solutions with a mass concentration of 5-10 mg / mL, and spin coat the solutions using a spin coater with a spin coating speed of 3000-5000 r / min and a spin coating time of 30-60 s. After spin coating, anneal the solutions in an inert gas atmosphere at 100-120℃ for 10-15 min. Step 4: Prepare a transparent conductive graphene layer on the mCP film using a solution method; using natural graphite powder as raw material and N-methylpyrrolidone as solvent, after ultrasonication at 40kHz and 300W in an ice bath for 4-6 hours and centrifugation at 3000-5000r / min for 30 minutes, a few-layer graphene dispersion of 0.5-1mg / mL is obtained. After filtration, spin-coating is performed on the surface of the mCP film at 3000-5000r / min for 30-60s. After vacuum drying at 60-80℃ for 30-40 minutes, the film is annealed at 80-100℃ in a nitrogen atmosphere for 1-3 hours. Step 5: Use magnetron sputtering to sputter Ti / Au electrodes on the β-Ga2O3 thin film surface and Ag electrodes on the graphene surface. The sputtering power is 80-150W and the sputtering time is 10-25min. The Ti / Au electrodes and Ag electrodes are encapsulated with quartz glass, the size of which is the same as that of the sapphire substrate.

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