Plasma light source detection device based on plasma spray gun and spectral analysis method

Abstract

One or more embodiments of the invention relate to the technical field of plasmas, and specifically provide a plasma light source detection device based on a plasma spray gun, which comprises a spray gun module, an optical acquisition module, a spectrometer, a data acquisition and processing module and a synchronous control module for coordinating spectrum acquisition and a working time sequence of the plasma spray gun, the spray gun module comprises a power supply assembly for providing a high-frequency high-voltage power supply and ionizing working gas into plasma; the gas supply assembly is used for controlling and conveying plasma working gas and auxiliary gas; the spray gun assembly is used for generating and focusing plasma jet; the optical acquisition module comprises an optical fiber probe for acquiring a plasma emission spectrum; the focusing lens is used for adjusting optical signals; the spectrograph is used for decomposing the plasma optical signal according to wavelength to obtain spectral data; and the data acquisition and processing module is used for recording spectral data in real time and supporting peak value identification and intensity analysis. External interference can be reduced, and spectral analysis can be accurately carried out in real time.

Description

Technical Field

[0001] One or more embodiments of this specification relate to the field of plasma technology, and in particular to a plasma light source detection device and a spectral analysis method based on a plasma spray gun. Background Art

[0002] Plasma spray gun technology, as a highly efficient material processing and surface treatment method, is widely used in coating preparation, material synthesis, waste treatment and other fields. Its core principle is to ionize the working gas into high-temperature plasma through arc or radio frequency excitation, forming a high-speed jet.

[0003] The Chinese invention patent application with application number CN(201910674260)X discloses a plasma-based portable spectral analysis device. By drilling a hole in the inner conductor of a microwave plasma torch light source system and introducing an optical fiber into the open end of the system, the plasma light source is directly captured at close range and transmitted to the spectral detection system. The spectral detection probe is integrated into the microwave plasma torch light source system using optical fiber, thereby reducing the size of the equipment and lowering costs.

[0004] However, the applicant has found that the prior art has at least the following problems:

[0005] The spectral analysis devices provided by the prior art have poor integration, are complex to operate, and have significant defects in real-time performance, accuracy, and applicability. Summary of the Invention

[0006] In view of this, the purpose of one or more embodiments of this specification is to propose a plasma light source detection device and a spectral analysis method based on a plasma spray gun to solve the problems that the spectral analysis devices provided by the prior art have poor integration, complex operation, and major defects in real-time performance, accuracy, and applicability.

[0007] Based on the above objectives, one or more embodiments of this specification provide a plasma light source detection device based on a plasma spray gun, comprising: a spray gun module, an optical acquisition module, a spectrometer, a data acquisition and processing module, and a synchronization control module for coordinating spectrum acquisition and plasma spray gun operation timing, wherein:

[0008] The spray gun module includes a power supply component for providing high-frequency and high-voltage power to ionize the working gas into plasma; a gas supply component for controlling and delivering the plasma working gas and auxiliary gas; and a spray gun component for generating and focusing the plasma jet.

[0009] The optical acquisition module includes a fiber optic probe for collecting plasma emission spectra; a focusing lens for adjusting the optical signal and reducing background interference;

[0010] The spectrometer is used to decompose the plasma optical signal by wavelength and obtain spectral data;

[0011] The data acquisition and processing module is used to record spectral data in real time and support peak recognition and intensity analysis.

[0012] Optionally, the spray gun assembly includes a housing. Inside the housing, a rotatable main shaft is installed. The main shaft is connected to a sealing gas seat. A main air duct for supplying gas is provided inside the main shaft. The sealing gas seat is connected to an air inlet joint. The air inlet joint is connected to the gas supply assembly. A slip ring is also sleeved on the main shaft. The slip ring is electrically connected to a conducting brush. The conducting brush is connected to a power connection post. The power connection post is electrically connected to the power supply assembly. A driven wheel is sleeved on the main shaft. The driven wheel is power-connected to a driving wheel. The driving wheel is power-connected to a driving motor. A flow-dividing air groove for connecting to the main air duct is provided inside the driven wheel. A flow-dividing air passage is also provided on the driven wheel. The flow-dividing air passage is communicated with the flow-dividing air groove. At least two groups of flow-dividing heads are installed on the wheel surface of the driven wheel away from the main shaft. The flow-dividing heads are symmetrically arranged with respect to the axis of the driven wheel. A flow-dividing channel is provided inside the flow-dividing head. Inside the flow-dividing channel, a power connection head is installed through a fixing rod for electrically connecting with the slip ring. The power connection head is connected to a wiring cylinder. The end of the wiring cylinder is connected to an electrode. A plurality of ejection holes are provided on the nozzle head. The housing is also integrally formed with a cylindrical gun head. The flow-dividing heads are arranged inside the gun head, and a cover plate is provided at the end of the gun head.

[0013] Optionally, a rotating wind wheel is installed in the flow-dividing channel. A plurality of holes are circularly arrayed around the axis on the rotating wind wheel. The rotating wind wheel is sleeved on the wiring cylinder. An installation sleeve is adaptively installed on the outer circumference of the rotating wind wheel. The rotating wind wheel can rotate inside the installation sleeve. Elastic telescopic tubes are respectively connected to both ends of the installation sleeve. The elastic telescopic tubes are embedded in the flow-dividing heads. Avoidance grooves are respectively provided on the two flow-dividing heads. An activity cavity is connected between the two avoidance grooves. Contact switches are connected to the two installation sleeves. The contact switches in the two flow-dividing heads are in relative contact in the activity cavity. The contact switches are electrically connected to the power supply assembly. When the two contact switches are in contact, the power supply assembly supplies power. When the two contact switches are not in contact, the power supply assembly is powered off. If the two contact switches are in contact again after a buffer time t, the synchronization control module alarms for an electrode fault. If the two contact switches are not in contact after the buffer time t, the synchronization control module alarms for an air flow splitting fault.

[0014] Optionally, the data acquisition and processing module is further used for spectral line identification, calibrating characteristic spectral lines, and distinguishing radiation signals of plasma excited states, including atoms, molecules, and ions.

[0015] Optionally, the data acquisition and processing module is also used for parameter calculations, including electron temperature: analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; electron density: calculated using the Stark broadening method, such as the half-maximum width of the Hβ spectral line; and active particle concentration: estimated based on the intensity of free radical spectral lines such as OH and O.

[0016] Optionally, the data acquisition and processing module also includes an overcurrent protection circuit, which samples the primary current of the transformer, obtains the sampled current value, and compares the sampled current value with the overcurrent set value. When the sampled current value is greater than the overcurrent set value, the comparator flips to a low level, and the low level signal is sent to the microcontroller for standing wave processing.

[0017] Optionally, the data acquisition and processing module also includes an output overcurrent protection circuit. When the output current is greater than the overcurrent set value, the comparator output is flipped and pulled to a low level, the chip performs protection delay processing, and blocks the PWM wave.

[0018] Optionally, the data acquisition and processing module also includes a power supply output short-circuit protection unit, including a single-chip microcomputer for sampling the power supply output current and output voltage values, and a judgment unit for making judgments, in which the short-circuit voltage setting value and the short-circuit current setting value are written. When the output voltage value is less than the short-circuit voltage setting value and the output current is greater than the short-circuit current setting value, the judgment unit determines that the power supply is short-circuited and sends the judgment result to the synchronous control module, which cuts off the power and issues an alarm.

[0019] Optionally, the data acquisition and processing module also includes a power supply output open circuit protection unit, including a single chip microcomputer for sampling the power supply output current and output voltage values, and a determination unit for making judgments, in which the short-circuit voltage setting value and the short-circuit current setting value are written. When the output voltage value is greater than the short-circuit voltage setting value and the output current is less than the short-circuit current setting value, the power supply is judged as an output open circuit, and the judgment result is sent to the synchronous control module, which cuts off the power and issues an alarm.

[0020] Optionally, the data acquisition and processing module further includes an atmospheric plasma light source detection unit, including an optical fiber collector, for collecting the intensity of the arc light of the spray gun assembly;

[0021] Signal converter, used to convert the arc brightness into voltage signal;

[0022] Collector, used to collect the voltage signal converted from the arc brightness;

[0023] The analysis unit is used to write the comparison set voltage. When the voltage signal is lower than the comparison set voltage, the arc brightness is lower than the set value, and it is judged that the plasma arc spray is abnormal. Otherwise, it is judged that the plasma arc spray is normal, and the judgment result is sent to the synchronous control module.

[0024] Spectral analysis method for a plasma light source detection device based on a plasma spray gun, characterized in that

[0025] A power supply component provides discharge energy, a gas supply component supplies gas at a set flow rate to maintain a stable jet, and a spray gun component focuses and generates a plasma jet;

[0026] A focusing lens adjusts the intensity of the optical signal, reduces background interference, an optical fiber probe collects the emitted light from the core area of the plasma, and sends the optical signal to a spectrometer;

[0027] The spectrometer performs spectral line identification, calibrates characteristic spectral lines, and distinguishes the radiation signals of the plasma excited state;

[0028] Parameter calculation is carried out. The electron temperature is determined by analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; the electron density is determined by the Stark broadening method; the active particle density is estimated based on the spectral line intensities of radicals such as OH and O.

[0029] The analysis results are output.

[0030] As can be seen from the above, the plasma light source detection device and spectral analysis method based on a plasma spray gun provided by one or more embodiments of this specification activate the spray gun component through the power supply component. The spray gun component generates and focuses a plasma jet. The gas supply component transports the working gas at a set flow rate to form a stable jet. The focusing lens focuses the light in the central area of the jet onto the optical fiber probe. The synchronization control module controls the triggering of the spectrometer. The spectrometer decomposes the optical signal by wavelength to obtain spectral data. The data acquisition and processing module grabs the spectral data and performs real-time analysis on the spectral data. More accurate light source detection data can be obtained, and various data results are generated in real time, with high applicability.

[0031] At the same time, by setting multiple rotating jet nozzles, the coverage range of the plasma is expanded, and the contact switches that cooperate with each other in the two flow splitters can monitor the uniformity of gas splitting and the damage degree of the electrodes, detect faults in a timely manner and eliminate the faults, improving the processing effect.

[0032] By setting an output current protection circuit, a power supply output short-circuit protection circuit, and a power supply output open-circuit protection circuit, it is ensured that during the working process, abnormal conditions in the circuit can be detected in real time and the circuit system of the entire device can be protected in real time. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only one or more embodiments of this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the system structure of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification;

[0035] Figure 2 It is a schematic diagram of an overcurrent protection circuit of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification;

[0036] Figure 3 It is a schematic diagram of an output overcurrent protection circuit of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification;

[0037] Figure 4 It is a schematic diagram of a light source detection circuit of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification;

[0038] Figure 5 It is a schematic diagram of the structure of the spray gun assembly 103 of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification;

[0039] Figure 6 It is a schematic diagram of the internal structure of the spray gun assembly 103 of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification Figure 1 ;

[0040] Figure 7 It is a schematic diagram of the internal structure of the spray gun assembly 103 of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification Figure 2 ;

[0041] Figure 8 It is a schematic diagram of the internal structure of the spray gun assembly 103 of a plasma light source detection device based on a plasma spray gun according to one or more embodiments of this specification Figure 3 ;

[0042] Figure 9 It is Figure 8 a partial enlarged schematic diagram of part A in

[0043] In the figure:

[0044] 1031. Housing; 1032. Gun head; 1033. Cover plate; 1034. Spray head; 1035. Driving wheel; 1036. Driving motor; 1037. Driven wheel; 1038. Main shaft; 1039. Conductive ring; 1040. Conductive brush; 1041. Electrical connection post; 1042. Sealing gas seat; 1043. Intake joint; 1044. Shunt head; 1045. Shunt air duct; 1046. Shunt gas groove; 1047. Fixed rod; 1048. Electrical connection head; 1049. Wiring cylinder; 1050. Electrode; 1051. Rotating wind wheel; 1052. Mounting sleeve; 1053. Avoidance groove; 1054. Movable cavity; 1055. Contact switch; 1057. Spray hole; 1058. Elastic telescopic tube. Detailed implementation manners

[0045] To make the objectives, technical solutions and advantages of the present disclosure clearer and more understandable, the present disclosure will be further described in detail below in conjunction with specific embodiments.

[0046] It should be noted that unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in one or more embodiments of this specification do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0047] One or more embodiments of this specification provide a plasma light source detection device based on a plasma spray gun, as Figure 1 shown, including a spray gun module 001, an optical acquisition module 002, a spectrometer 003, a data acquisition and processing module 004, and a synchronization control module 005 for coordinating the spectral acquisition and the working timing of the plasma spray gun, where:

[0048] The spray gun module 001 includes a power supply assembly 101 for providing a high-frequency high-voltage power supply to ionize the working gas into plasma; a gas supply assembly 102 for controlling and delivering the plasma working gas and the auxiliary gas; a spray gun assembly 103 for generating and focusing the plasma jet;

[0049] The optical acquisition module 002 includes an optical fiber probe 201 for collecting the plasma emission spectrum; a focusing lens 202 for adjusting the optical signal to reduce background interference;

[0050] The spectrometer 003 is used to decompose the plasma optical signal by wavelength to obtain spectral data;

[0051] The data acquisition and processing module 004 is used to record the spectral data in real time and support peak recognition and intensity analysis.

[0052] During use, the spray gun assembly 103 is activated by the power supply assembly 101. The spray gun assembly 103 generates and focuses the plasma jet. The gas supply assembly 102 delivers the working gas at a set flow rate to form a stable jet. The focusing lens 202 focuses the light in the central region of the jet onto the optical fiber probe 201. The synchronous control module 005 controls and triggers the spectrometer 003. The spectrometer 003 decomposes the optical signal by wavelength to obtain spectral data. The data acquisition and processing module 004 captures the spectral data and performs real-time analysis on the spectral data. More accurate light source detection data can be obtained, and the results of each data item are generated in real time, with high applicability.

[0053] In some optional specific embodiments, such as Figures 5 to 9As shown, the spray gun assembly 103 includes a housing 1031. Inside the housing 1031, a rotatable main shaft 1038 is installed. The main shaft 1038 is connected to a sealing air seat 1042. A main air passage for supplying air is provided inside the main shaft 1038. The sealing air seat 1042 is connected to an air inlet joint 1043, and the air inlet joint 1043 is connected to the gas supply assembly 102. A slip ring 1039 is also sleeved on the main shaft 1038. The slip ring 1039 is electrically connected to a conducting brush 1040, and the conducting brush 1040 is connected to a power connection post 1041. The power connection post 1041 is electrically connected to the power supply assembly 101. A driven wheel 1037 is sleeved on the main shaft 1038. The driven wheel 1037 is power-connected to a driving wheel 1035, and the driving wheel 1035 is power-connected to a driving motor 1036. A split air groove 1046 for docking with the main air passage is provided inside the driven wheel 1037. A split air passage 1045 is also provided on the driven wheel 1037. The split air passage 1045 is communicated with the split air groove 1046. At least two sets of split heads 1044 are installed on the side wheel surface of the driven wheel 1037 away from the main shaft 1038. The split heads 1044 are symmetrically arranged with respect to the axis of the driven wheel 1037. A split channel is provided inside the split head 1044. An electric connection head 1048 is installed inside the split channel through a fixing rod 1047 for electrically connecting with the slip ring 1039. The electric connection head 1048 is connected to a wiring cylinder 1049, and an end of the wiring cylinder 1049 is connected to an electrode 1050. A spray head 1034 is installed at the end of the split channel. A plurality of ejection holes 1057 are provided on the spray head 1034. The housing 1031 is also integrally formed with a cylindrical gun head 1032. The split heads 1044 are arranged inside the gun head 1032, and a cover plate 1033 is provided at the end of the gun head 1032. During use, the driving motor 1036 provides power for the driving wheel 1035 to drive the driven wheel 1037 to rotate, and then drives the main shaft 1038 to rotate. The gas supply assembly 102 supplies gas. The gas enters the split air groove 1046 through the main air passage, and then enters the split heads 1044 through the split air passage 1045. The electrodes 1050 in the split heads 1044 are powered by the power supply assembly 101, so as to form a high-speed jet ejected from the ejection holes 1057, which can repeatedly spray the same processing surface, improve the coverage range of the plasma, and thus improve the processing effect.

[0054] In some alternative specific embodiments, such as Figure 9As shown, a rotary wind wheel 1051 is installed in the shunt channel. A plurality of holes are circularly arrayed on the rotary wind wheel 1051 with the axis as the center. The rotary wind wheel 1051 is sleeved on a wiring cylinder 1049. An installation sleeve 1052 is adaptively installed on the outer periphery of the rotary wind wheel 1051. The rotary wind wheel 1051 can rotate within the installation sleeve 1052. Elastic telescopic tubes 1058 are respectively connected to both ends of the installation sleeve 1052. The elastic telescopic tubes 1058 are embedded in a shunt head 1044. Avoidance grooves 1053 are respectively formed on two groups of shunt heads 1044. An activity cavity 1054 is connected between the two groups of avoidance grooves 1053. Two groups of installation sleeves 1052 are connected to a contact switch 1055. The contact switches 1055 in the two groups of shunt heads 1044 are in relative contact within the activity cavity 1054. The contact switch 1055 is electrically connected to a power supply assembly 101. When the two groups of contact switches 1055 are in contact, the power supply assembly 101 supplies power. When the two groups of contact switches 1055 are not in contact, the power supply assembly 101 cuts off the power. If, after a buffer time t, the two groups of contact switches 1055 are in contact again, the synchronization control module 005 alarms for an electrode 1050 fault. If, after the buffer time t, the two groups of contact switches 1055 are not in contact, the synchronization control module 005 alarms for an air flow shunt fault. During operation, since it is not an ideal working condition, in order to reduce the effect of the gravity of components during inclined rotation, according to the actual working conditions, those skilled in the art can make the sizes of the rotary wind wheel 1051 and the contact switch 1055 as small as possible and use materials with a relatively small density such as aluminum alloy. Under the action of the air flow, the rotary wind wheel 1051 rotates. The holes on the rotary wind wheel 1051 average the air flow in a single shunt head 1044. At the same time, under the action of the air flow, the elastic telescopic tube 1058 deforms, causing the rotary wind wheel 1051 to move a certain distance in the axial direction of the shunt channel. If the positions of the two rotary wind wheels 1051 in the axial direction of the shunt channel are different, the contact switch 1055 disconnects. At this time, the power supply assembly 101 cuts off the power, shielding the influence of the temperature at the electrode 1050. After a buffer period of time t, if the contact switch 1055 reconnects, it indicates that the air flow shunt is uniform, and the synchronization control module 005 alarms for an electrode 105o fault. If, after the buffer time t, the two groups of contact switches 1055 are not in contact, the synchronization control module 005 alarms for an air flow shunt fault. It can monitor the uniformity of gas shunt during the working process and simultaneously monitor the loss degree of the electrode 1050, improving the uniformity of treatment.

[0055] In some optional specific embodiments, the data acquisition and processing module 004 is further configured to identify spectral lines and calibrate characteristic spectral lines, such as ArI (750.4 nm), N2 (337.1 nm), OH (309 nm), etc.; and distinguish the radiation signals of plasma excited states, including atoms, molecules, and ions.

[0056] In some optional specific embodiments, the data acquisition and processing module 004 is further configured for parameter calculation, including electron temperature: analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; electron density: calculating using the Stark broadening method, such as the full width at half maximum of the Hβ spectral line; active particle concentration: estimating based on the spectral line intensities of free radicals such as OH and O.

[0057] In some optional specific embodiments, the data acquisition and processing module 004 further includes an overcurrent protection circuit. As shown in the figure, the primary current of the transformer is sampled to obtain a sampled current value, and the sampled current value is compared with the overcurrent set value. When the sampled current value is greater than the overcurrent set value, the comparator flips to output a low level, and the low-level signal is sent to the single-chip microcomputer for standing wave processing. Thus, the function of standing-wave current limiting protection is achieved.

[0058] In some optional specific embodiments, the data acquisition and processing module 004 further includes an output overcurrent protection circuit. As shown in the figure, when the output current is greater than the overcurrent set value, the output of the comparator flips to pull to a low level. The SE chip performs protection delay processing and blocks the PWM wave. The ZBBH_ signal is sent to the single-chip microcomputer, and the power supply is protected and shut down.

[0059] In some optional specific embodiments, the data acquisition and processing module 004 further includes a power output short-circuit protection unit, including a single-chip microcomputer for sampling the power output current and output voltage values, a determination unit for making a judgment, and a short-circuit voltage set value and a short-circuit current set value are written in the determination unit. When the output voltage value is less than the short-circuit voltage set value and the output current is greater than the short-circuit current set value, the judgment unit determines that the power supply is in output short circuit, and sends the judgment result to the synchronous control module 005. The synchronous control module 005 cuts off the power and gives an alarm.

[0060] In some optional specific embodiments, the data acquisition and processing module 004 further includes a power output open-circuit protection unit, including a single-chip microcomputer for sampling the power output current and output voltage values, a determination unit for making a judgment, and a short-circuit voltage set value and a short-circuit current set value are written in the determination unit. When the output voltage value is greater than the short-circuit voltage set value and the output current is less than the short-circuit current set value, the power supply is determined to be in output open circuit, and the judgment result is sent to the synchronous control module 005. The synchronous control module 005 cuts off the power and gives an alarm.

[0061] In some optional specific embodiments, the data acquisition and processing module 004 further includes an atmospheric plasma light source detection unit, such as Figure 4 shown, including fiber optic collection for collecting the intensity of the arc light of the spray gun assembly 103;

[0062] a signal converter for converting the intensity of the arc light into a voltage signal;

[0063] A collector for collecting the voltage signal converted from the intensity change of the arc light;

[0064] An analysis unit for writing and comparing the set voltage. When the voltage signal is lower than the compared set voltage, it indicates that the arc brightness is lower than the set value, and it is determined that the plasma arc spraying is abnormal; otherwise, it is determined that the plasma arc spraying is normal, and the determination result is sent to the synchronization control module 005.

[0065] The present invention also provides a spectral analysis method based on a plasma spray gun, including:

[0066] S01, the power supply component 101 provides discharge energy, the gas supply component 102 supplies gas according to the set flow rate to maintain the jet stability, and the spray gun component 103 focuses and generates a plasma jet;

[0067] S02, the focusing lens 202 adjusts the optical signal intensity to reduce background interference, the optical fiber probe 201 collects the emitted light from the core area of the plasma, and sends the optical signal to the spectrometer 003;

[0068] S03, the spectrometer 003 performs spectral line identification, calibrates characteristic spectral lines, and distinguishes the radiation signals of the plasma excited state;

[0069] S04, perform parameter calculation, determine the electron temperature by analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; determine the electron density by using the Stark broadening method; estimate the active particle density according to the spectral line intensities of free radicals such as OH and O.

[0070] S05, output the analysis result.

[0071] The working principle of the present invention: When in use, the spray gun component is activated by the power supply component, the spray gun component generates and focuses a plasma jet, the gas supply component transports the working gas according to the set flow rate to form a stable jet, the focusing lens focuses the light in the central area of the jet onto the optical fiber probe, the synchronization control module controls the trigger of the spectrometer, the spectrometer decomposes the optical signal by wavelength to obtain spectral data, and the data acquisition and processing module grabs the spectral data and performs real-time analysis on the spectral data. More accurate light source detection data can be obtained, and various data results are generated in real time, with high applicability.

[0072] Although the present disclosure has been described in connection with specific embodiments of the present disclosure, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0073] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.

Claims

1. Plasma light source detection device based on a plasma spray gun, characterized in that, Comprising: A spray gun module (001), an optical acquisition module (002), a spectrometer (003), a data acquisition and processing module (004), and a synchronization control module (005) for coordinating the working time sequence of spectral acquisition and the plasma spray gun, where: The spray gun module (001) includes a power supply component (101) for providing a high-frequency high-voltage power supply to ionize the working gas into plasma; a gas supply component (102) for controlling and transporting the plasma working gas and the auxiliary gas; a spray gun component (103) for generating and focusing the plasma jet; The optical acquisition module (002) includes an optical fiber probe (201) for acquiring the plasma emission spectrum; a focusing lens (202) for adjusting the optical signal to reduce background interference; The spectrometer (003) is used to decompose the plasma optical signal by wavelength to obtain spectral data; The data acquisition and processing module (004) is used to record the spectral data in real time and support peak identification and intensity analysis.

2. The plasma light source detection device based on a plasma spray gun according to claim 1, wherein The spray gun component (103) includes a housing (1031). Inside the housing (1031), a rotatable main shaft (1038) is installed. The main shaft (1038) is connected to a sealing gas seat (1042). A main air passage for air supply is opened inside the main shaft (1038). The sealing gas seat (1042) is connected to an air inlet joint (1043). The air inlet joint (1043) is connected to the gas supply component (102). A conductive ring (1039) is also sleeved on the main shaft (1038). The conductive ring (1039) is electrically connected to a conductive brush (1040). The conductive brush (1040) is connected to a power connection post (1041). The power connection post (1041) is electrically connected to the power supply component (101). A driven wheel (1037) is sleeved on the main shaft (1038). The driven wheel (1037) is power-connected to a driving wheel (1035). The driving wheel (1035) is power-connected to a driving motor (1036). A shunt air groove (1046) for docking with the main air passage is opened inside the driven wheel (1037). A shunt air passage (1045) is also opened on the driven wheel (1037). The shunt air passage (1045) is communicated with the shunt air groove (1046). At least two groups of shunt heads (1044) are installed on the side wheel surface of the driven wheel (1037) away from the main shaft (1038). The shunt heads (1044) are symmetrically arranged with respect to the axis of the driven wheel (1037). A shunt channel is provided inside the shunt head (1044). A power connection head (1048) is installed inside the shunt channel through a fixing rod (1047) for electrically connecting with the conductive ring (1039). The power connection head (1048) is connected to a wiring cylinder (1049). The end of the wiring cylinder (1049) is connected to an electrode (1050). The end of the shunt channel is installed with a spray head (1034). A plurality of ejection holes (1057) are opened on the spray head (1034). The housing (1031) is also integrally formed with a cylindrical gun head (1032). The shunt head (1044) is arranged inside the gun head (1032), and a cover plate (1033) is provided at the end of the gun head (1032).

3. The plasma light source detection device based on a plasma spray gun according to claim 2, wherein A rotating wind wheel (1051) is installed in the diversion channel. A plurality of holes are provided in a circular array with the axis as the center on the rotating wind wheel (1051). The rotating wind wheel (1051) is sleeved on the wiring barrel (1049). A mounting sleeve (1052) is adapted to be mounted on the outer periphery of the rotating wind wheel (1051). The rotating wind wheel (1051) can rotate in the mounting sleeve (1052). Both ends of the mounting sleeve (1052) are respectively connected with elastic telescopic tubes (1058). The elastic telescopic tubes (1058) are embedded in the diversion head (1044). Avoidance grooves (1053) are respectively provided on the two groups of diversion heads (1044). An active cavity (1054) is connected between the two groups of avoidance grooves (1053). The two groups of mounting sleeves (1052) are connected to each other. A contact switch (1055) is connected, and the contact switches (1055) in the two groups of diversion heads (1044) are in relative contact in the active cavity (1054). The contact switches (1055) are electrically connected to the power supply component (101). When the two groups of contact switches (1055) are in contact, the power supply component (101) supplies power. When the two groups of contact switches (1055) are not in contact, the power supply component (101) is powered off. If the two groups of contact switches (1055) are in contact again after a buffer time t, the synchronous control module (005) alarms that the electrode (1050) is faulty. If the two groups of contact switches (1055) are not in contact after a buffer time t, the synchronous control module (005) alarms that the airflow diversion is faulty.

4. The plasma light source detection device based on a plasma spray gun according to claim 1, characterized in that The data acquisition and processing module (004) is also used for parameter calculation, including electron temperature: analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; electron density: calculated using the Stark broadening method, such as the half-height width of the Hβ spectral line; active particle concentration: calculated based on the intensity of the spectral lines of free radicals such as OH and O.

5. The plasma light source detection device based on a plasma spray gun according to claim 1, wherein The data acquisition and processing module also includes an overcurrent protection circuit, which samples the primary current of the transformer, obtains the sampled current value, and compares the sampled current value with the overcurrent set value. When the sampled current value is greater than the overcurrent set value, the comparator flips to a low level, and the low level signal is sent to the microcontroller for standing wave processing.

6. The plasma light source detection device based on a plasma spray gun according to claim 1, characterized in that, The data acquisition and processing module also includes an output overcurrent protection circuit. When the output current is greater than the overcurrent set value, the comparator output is flipped and pulled to a low level, the chip performs protection delay processing, and blocks the PWM wave.

7. The plasma light source detection device based on a plasma spray gun according to claim 1, characterized in that, The data acquisition and processing module further comprises a power supply output short-circuit protection unit, comprising a single chip computer for sampling the output current and output voltage values of the power supply, and a determination unit for making a judgment, wherein a short-circuit voltage setting value and a short-circuit current setting value are written into the determination unit. When the output voltage value is less than the short-circuit voltage setting value and the output current is greater than the short-circuit current setting value, the determination unit determines that the power supply has an output short circuit, and sends the determination result to the synchronous control module (005), which then cuts off the power supply and issues an alarm.

8. The plasma light source detection device based on a plasma spray gun according to claim 1, characterized in that, The data acquisition and processing module further includes a power output open - circuit protection unit, which includes a single - chip microcomputer for sampling the power output current and output voltage values, and a determination unit for making judgments. A short - circuit voltage set value and a short - circuit current set value are written in the determination unit. When the output voltage value is greater than the short - circuit voltage set value and the output current is less than the short - circuit current set value, the power supply is judged to be open - circuited, and the judgment result is sent to the synchronization control module (005). The synchronization control module (005) cuts off the power supply and gives an alarm.

9. The plasma light source detection device based on a plasma spray gun according to claim 1, wherein, The data acquisition and processing module (004) further includes an atmospheric plasma light source detection unit, which includes an optical fiber collector for collecting the intensity of the arc light of the spray gun assembly (103); A signal converter for converting the intensity of the arc light into a voltage signal; A collector for collecting the voltage signal converted from the intensity of the arc light; An analysis unit for writing a comparison set voltage. When the voltage signal is lower than the comparison set voltage, the arc brightness is lower than the set value, and it is judged that the plasma arc spraying is abnormal. Otherwise, it is judged that the plasma arc spraying is normal, and the judgment result is sent to the synchronization control module (005).

10. The spectral analysis method of the plasma light source detection device based on a plasma spray gun according to claims 1 to 9, characterized in that The power supply assembly (101) provides discharge energy, the gas supply assembly (102) supplies gas at a set flow rate to maintain the jet stability, and the spray gun assembly (103) focuses and generates a plasma jet; The focusing lens (202) adjusts the optical signal intensity to reduce background interference. The optical fiber probe (201) collects the emitted light in the plasma core area and sends the optical signal to the spectrometer (003); The spectrometer (003) performs spectral line identification, calibrates characteristic spectral lines, and distinguishes the radiation signals of the plasma excited state; Parameter calculations are carried out. The electron temperature is determined by analyzing the intensity ratio of multiple atomic spectral lines through the Boltzmann diagram method; the electron density is determined by the Stark broadening method; the active particle density is estimated according to the spectral line intensities of OH, O and other free radicals. The analysis results are output.

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