JP5630165B2 - Sporation evaluation system, image processing program, and arc extinguishing apparatus - Google Patents

Description

  The present invention relates to a sporation evaluation system for evaluating sporation particles, an image processing program thereof, and an arc extinguishing apparatus (breaker, insulator arc horn, etc.) for extinguishing arc plasma between terminals. .

When tripping a circuit breaker that requires high power, arc plasma is generated. Since the arc plasma is very hot, conductivity is maintained, and in order to cut off the current, it is necessary to extinguish the arc plasma quickly. Therefore, conventionally, highly insulating SF ₆ (sulfur hexafluoride) gas was sprayed between terminals (between electrodes) to extinguish arc plasma. However, SF ₆ gas has a global warming potential (Global Warming Potential) of about 23,900 times that of CO ₂ (carbon dioxide) gas, and a reduction in total usage is required.

Patent document 1 is disclosing the circuit breaker which provided the adherence part which ablates (melts) and discharge | releases gas by heating with the arc energy induced | guided | derived from arc space. In Patent Document 1, by such circuit breakers, it is said to be possible ensure a high interruption performance by reducing the amount of SF ₆ gas.

  Patent Document 2 discloses a circuit breaker in which an upstream portion of an insulating nozzle that induces a gas flow to an arc is formed of a material having a larger black density index than a throat portion for restricting the gas flow. In Patent Document 2, such a circuit breaker can generate a high blowing pressure while preventing an increase in the inner diameter of the throat portion, and can stably exhibit current interrupting performance.

  On the other hand, as described in Non-Patent Document 1, in recent years, in the field of space engineering, the ablator (thermal protection material) does not cause a phenomenon that solid particles called “sporation” jump out in addition to ablation. It is guessed. Under the present circumstances, it has not been elucidated what kind of substance causes such a sporation phenomenon.

JP 2002-75147 A JP 2007-73384 A

“Study on Sporation Particles Released from Ablators”, [online], Kyushu University Graduate School of Engineering, Department of Aerospace Engineering, Fluid Dynamics Laboratory, [August 31, 2010 search], Internet <URL: http: // www.aero.kyushu-u.ac.jp/fml/research/spallation/spallation-1.htm>

  In recent years, where countermeasures against global warming are required, a circuit breaker that uses as little greenhouse gas as possible is desired. The circuit breakers of Patent Documents 1 and 2 may certainly reduce the amount of greenhouse gas used to some extent, but are still insufficient.

  On the other hand, the sporation phenomenon proposed in the field of space engineering has only just made it possible to visualize the solid particles popping out by the sporation. In order to further clarify such a phenomenon, a system for accurately capturing and evaluating the behavior of each of the particles is required.

  The present inventors have intensively studied in order to provide an arc extinguishing device that can use a greenhouse gas as much as possible and can secure a sufficient shut-off performance. Pay attention. In other words, we considered whether the sporation phenomenon, which has been studied as an unexpected (should be avoided) phenomenon as a thermal protection material in the space engineering field, can be actively used for arc extinguishing of electric power equipment. However, as described above, the sporation phenomenon has just been visualized at present, and it has not been elucidated what kind of substance it causes under what conditions.

  Therefore, the present inventors have repeated research, and by continuously capturing images of the vicinity of the surface of the polymer material irradiated with arc plasma at high speed and appropriately processing the captured images, the trajectory of the sporation particles Has succeeded in establishing a technology to output a composite image in which is displayed. And based on this technical idea, it came to complete the evaluation system which evaluates the scattering range of scattering particles, scattering height, and density. This makes it possible to evaluate and select a polymer material that generates sporation particles by arc plasma, and to complete an arc extinguishing apparatus that mixes the sporation particles in the arc plasma to promote arc extinction.

The typical configuration of the system for evaluating a sporation according to the present invention includes a plasma irradiation unit for irradiating a polymer material with arc plasma, an imaging unit capable of continuously imaging a state near the surface of the polymer material, and continuous imaging at high speed. An image processing unit that processes a plurality of images and outputs a composite image in which the trajectory of the sporation particles is displayed; and at least one of a scattering range or a scattering height or density of the sporation particles by analyzing the composite image and a spot configuration evaluation unit for evaluating the one, the image processing unit, for each pixel, select the value that brightness is maximum among the plurality of consecutive images captured in the high-speed, in each pixel Generating the composite image by setting a selected value .

  With such a configuration, it is possible to obtain a composite image in which the locus of the sporation particles is clearly displayed. Thereby, the scattering range, scattering height, and density of the sporation particles can be appropriately evaluated. Therefore, it is possible to appropriately select (evaluate) a polymer material that generates sporation particles by irradiation with arc plasma.

Further, the image processing unit selects, for each pixel, a value that maximizes brightness from a plurality of images that are continuously captured at high speed, and sets the selected value for each pixel. Generate . As a result, pixels that have become bright even once are displayed brightly in the composite image. Therefore, it is possible to generate a composite image (grayscale, color image) in which the locus of the sporation particles is clearly displayed.

  The plurality of images may be color images composed of three primary colors, and the image processing unit may extract one piece of color information that maximizes the brightness of a specific primary color for each corresponding pixel of the plurality of images. . As a result, it is possible to generate a composite image (color image) in which the locus of the sporation particles is clearly displayed.

A typical configuration of the image processing program according to the present invention is a computer for outputting a composite image in which the trajectory of sporation particles is displayed, and a state near the surface of the polymer material irradiated with arc plasma is continuously displayed at high speed. Combining image acquisition means for acquiring a plurality of captured images, color information extraction means for extracting one color information with the maximum brightness for each corresponding pixel of the plurality of images, and color information extracted for each pixel In this way, it is made to function as a composite image generation means for generating a composite image.

  With this configuration, it is possible to provide a versatile image processing program that contributes to the elucidation of the phenomenon of sporation. In addition, the component corresponding to the technical idea in the above-described sporation evaluation system and the description thereof are also applied to the image processing program.

  Another exemplary configuration of the present invention is an arc extinguishing apparatus for extinguishing an arc plasma generated between two terminals, in which a polymer material that generates sporation particles by the arc plasma is disposed between the terminals and The arc plasma is arranged at a position where the sporation particles are mixed.

  In such a configuration, since the ablation is performed after the sporation particles enter the inside of the arc plasma, the arc plasma can be cooled and extinguished in a wider range. It can also be expected that the sporation particles enter the arc plasma and physically divide the arc plasma. This is because the sporation particles, which are physical lumps, have a significantly greater penetration than the ablated gas. As a result, it is possible to ensure sufficient blocking performance without using greenhouse gases as much as possible.

  In the ablator as a thermal protection material, the sporation phenomenon is a phenomenon that should be avoided in order to expedite material consumption. On the other hand, the arc-extinguishing apparatus of the present invention is positioned at the counter electrode in that it intends to positively use the phenomenon of sporation (sporation particles).

  The polymer material may be a polyamide-based synthetic resin. It was confirmed that when a polyamide-based synthetic resin was irradiated with arc plasma, sporlation particles were generated. Therefore, if it is a polyamide-type synthetic resin, it can be expected to exhibit a certain arc extinguishing effect.

  A cylindrical insulating nozzle that surrounds at least one of the terminals from the outside may be provided, and at least a part of the inner peripheral surface of the insulating nozzle may be formed of the polymer material. That is, in a circuit breaker provided with an insulating nozzle on the outside of one terminal, arc plasma generated at the time of tripping is preferably formed by forming at least a part of the inner peripheral surface of the insulating nozzle with a spouting polymer material. Can be extinguished.

  ADVANTAGE OF THE INVENTION According to this invention, the sporation evaluation system which acquires the synthetic | combination image by which the locus | trajectory of the sporation particle was displayed, and can evaluate the scattering range, the scattering height, and the density of the sporation particle appropriately can be provided. In addition, it is possible to provide a highly versatile image processing program that is used to acquire a composite image in which the trajectory of the sporation particles is displayed. In addition, it is possible to provide an arc extinguishing device that uses as little greenhouse gas as possible and can ensure a sufficient shut-off performance.

It is a block diagram which shows schematic structure of the sporation evaluation system concerning this embodiment. It is a flowchart explaining operation | movement of the sporation evaluation system concerning this embodiment. It is the figure illustrated about the plasma irradiation part and imaging part of FIG. 4 is one of a plurality of images obtained by continuously imaging a polymer material at a high speed by the plasma irradiation unit and the imaging unit of FIG. 3. It is the figure which illustrated typically the process by the image process part of FIG. It is a synthetic image of each polymer material of Drawing 4 (a)-(d). It is a figure which shows schematic structure of the circuit breaker as an arc-extinguishing apparatus concerning this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

[Sporation evaluation system]
FIG. 1 is a block diagram showing a schematic configuration of a sporation evaluation system 100 according to the present embodiment. FIG. 2 is a flowchart for explaining the operation of the sporation evaluation system 100. As shown in FIG. 1, the sporation evaluation system 100 can be realized as a computer system including a system control unit 102 and a storage unit 104.

  The system control unit 102 is a semiconductor integrated circuit including a central processing unit (CPU), and performs management and control of the entire spot evaluation system 100. The storage unit 104 includes a ROM, a RAM, an EEPROM, a nonvolatile RAM, a flash memory, an HDD, and the like, and stores programs used in the system and various data (image data captured by the image capturing unit 112).

  In addition, the sporation evaluation system 100 includes an input unit 106 and an output unit 108. The input unit 106 takes in predetermined information from the outside to the system by a keyboard, a mouse, a touch panel, a file input / output device, data communication through a network, or the like. The output unit 108 includes a display, a printer, and the like, and displays information to the user and performs printing. It is also possible to save the output content as data in a recording medium, or to perform data communication or web display over a network.

  Hereinafter, the operation of the sporation evaluation system 100 will be described with reference to the flowchart of FIG. In addition, the plasma irradiation unit 110, the imaging unit 112, the image processing unit 114 (the color information extraction unit 114a, the composite image generation unit 114b), and the sporation evaluation unit 116 of the sporation evaluation system 100 will be described. As shown in FIG. 2, the sporation evaluation system 100 evaluates the sporation phenomenon of the polymer material 118 (see FIG. 3) through steps S150 to S162.

  In step S150, the plasma irradiation unit 110 irradiates the polymer material 118 with the arc plasma 110a. Then, the imaging unit 112 continuously captures a state near the surface of the polymer material 118 at a high speed (for example, continuously captures at 1000 fps (Frames Per Second)). In the present embodiment, the captured image of the imaging unit 112 is a color image composed of the three primary colors RGB.

  FIG. 3 is a diagram illustrating the plasma irradiation unit 110 and the imaging unit 112. FIG. 3A is a diagram illustrating a specific configuration thereof, FIG. 3B is a side view of the polymer material 118 and the sample holder 120a of FIG. 3A, and FIG. 3C is FIG. It is a top view of the polymer material 118 of a) and the sample holder 120a.

As illustrated in FIG. 3A, the plasma irradiation unit 110 includes a thermal plasma torch 110b and a reaction vessel 110c. The thermal plasma torch 110b and the reaction vessel 110c are filled with Ar gas, N ₂ gas or the like, and the polymer material 118 is irradiated with the arc plasma 110a. The imaging unit 112 includes a high-speed camera 112a (cannot be a still image camera or a camera with a slow shutter speed) and a band-pass filter 112b that transmits C ₂ swan system spectrum light.

The bandpass filter 112b is used for observing bluish-white light (mainly C ₂ swan spectrum light) emitted by vapor or ablation particles 122 due to ablation. Incidentally, even if caused ablation, if not emit C ₂ Swan system spectrum light is not substantially reflected to a captured image by such band-pass filter 112b.

  As illustrated in FIGS. 3B and 3C, the polymer material 118 is configured as a bulk material (polymer bulk) having a predetermined thickness and diameter. And it is supported by the sample holder 120a of the holder part 120.

  Returning to the flowchart of FIG. In step S152, the system control unit 102 determines whether or not the polymer material 118 irradiated with the arc plasma 110a causes a sporing phenomenon from a plurality of images continuously captured at a high speed in step S150. When the polymer material 118 does not cause a spoiling phenomenon (No at Step S152), the output unit 108 outputs the fact to the user (Step S162).

  FIG. 4 is one of a plurality of images obtained by continuously imaging the polymer material 118 at a high speed by the plasma irradiation unit 110 and the imaging unit 112 of FIG. FIG. 4A shows a captured image of PTFE (Poly Tetra Fluoroethylene: polytetrafluoroethylene) as the polymer material 118, and FIG. 4B shows a captured image of POM (Poly Oxy Methylene: polyoxymethylene) as the polymer material 118. 4C is a captured image of PA6 (nylon 6 (PA is Poly Amide)) as the polymer material 118, and FIG. 4D is a captured image of PA66 (nylon 66) as the polymer material 118. . As shown in FIGS. 4A to 4D, according to the plasma irradiation unit 110 and the imaging unit 112 described above, it is possible to clearly confirm the presence / absence of a scaling phenomenon.

As shown in FIG. 4A, in the case of PTFE, the vicinity of the surface is covered with pale light (such as haze). The pale light is C ₂ Swan system spectrum light, is considered to steam by ablation has occurred. In the case of PTFE, it is considered that the ablation simulation by the calculation and the distribution are in good agreement, and that no sporation phenomenon occurs.

As shown in FIG. 4B, almost pale light is not imaged in the POM. In practice, the amount of ablation of POM is the most common of the four materials, C ₂ Swan system spectrum light is blocked by the band-pass filter 112b for hardly emitted, the captured image has appeared it Absent. However, it has been confirmed by a separate experiment (an experiment using another polarizing filter) that no sporation occurs even in the POM.

  On the other hand, in PA6 in FIG. 4C and PA66 in FIG. 4D, that is, a polyamide-based synthetic resin, the state in which the sporation particles 122 are scattered in addition to the haze near the surface due to ablation. It can be captured clearly.

  Returning to the flowchart of FIG. When the polymer material 118 irradiated with the arc plasma 110a causes a spor phenomenon (Yes in step S152), the process proceeds to step S154. In step S154, the image processing unit 114 extracts a plurality of images obtained by imaging the sporation particles 122.

  For example, it is assumed that the imaging unit 112 has continuously imaged the state near the surface of the polymer material 118 at a high speed for 20 seconds from the start of irradiation with the arc plasma 110a. In this case, it is not always necessary to extract all the plurality of images. It is sufficient to extract a plurality of images in an arbitrary time zone (a plurality of images in a time zone to be synthesized) in which the sporation particles 122 are captured. Specifically, when the imaging speed is 1000 fps, a plurality of images (1000 images / second × 0.1 seconds = 100 images) of any 0.1 seconds in which the sporation particles 122 are imaged are extracted. Good.

  FIG. 5 is a diagram schematically illustrating the processing by the image processing unit 114. As described above, in the present embodiment, the captured image of the imaging unit 112 is a color image composed of the three primary colors RGB. In such a color image, color information is set for each pixel. The color information is lightness information of each RGB channel, that is, lightness of R (red), lightness of G (green), and lightness of B (blue), each represented by a value of 0 to 255 (24-bit color). in the case of).

Returning to the flowchart of FIG. In step S156, the color information extraction unit 114a extracts one piece of color information that maximizes the brightness of a specific primary color for each pixel from the plurality of images extracted in step S154. In other words, color information with the maximum brightness is extracted by scanning pixel by pixel in the time axis direction. In the present embodiment, since the C ₂ swan system spectral light is close to B (blue), one color information with the maximum primary color of B (blue) is extracted. In step S158, the composite image generation unit 114b combines the color information extracted for each pixel in step S156 to generate a composite image.

As shown in FIG. 5, the locus of ablation vapor or sporation particles 122 emitting C ₂ swan spectrum light is displayed in this synthesized image. This is because a pixel that has become brighter once by passing through the sporation particles 122 or the like is displayed brighter in the synthesized image.

  In addition, instead of the above method, for example, if all the images are simply added, the vicinity of the ablated sample is saturated immediately, and it becomes difficult to observe for a long time. In addition, if the images are simply overlapped and averaged, the vicinity of the sample where ablation is occurring always becomes bright without being saturated, but the sporation splashes are weakened by the average because they pass for a moment. It becomes impossible to observe. That is, according to the above method, the vicinity of the sample is not saturated, and the sporation particles can be observed as a locus having the same brightness.

  FIG. 6 is a composite image of each polymer material 118 of FIGS. 4 (a) to 4 (d). 6A is a composite image of PTFE generated by the method described above, FIG. 6B is a composite image of POM generated by the method described above, and FIG. 6C is generated by the method described above. FIG. 6D shows a composite image of PA66 generated by the method described above.

  6 (a) and 6 (b), the PTFE and POM did not generate a sporing phenomenon in the first place, so that the sporing particles 122 are not observed in the synthesized image. In these cases, there is not much change between the synthesized image and each captured image.

  As shown in FIGS. 6C and 6D, in the synthetic image of nylon 6 and nylon 66, which are polyamide-based synthetic resins, the locus of the sporation particles 122 is clearly displayed. In these composite images, the sporation particles 122 are displayed as particles. However, if the images are densely captured with a faster shutter, the locus is displayed as a line.

  Returning to the flowchart of FIG. In step S160, the sporation evaluation unit 116 analyzes the composite image generated in step S158 and evaluates at least one of the scattering range or scattering height or density of the sporation particles. In step S162, the output unit 108 outputs the evaluation result to the user.

  The evaluation result of the scattering range or scattering height or density of the sporation particles can be used to select the polymer material 118 applied to the circuit breaker 130 as an arc extinguishing device described later. Table 1 shows the evaluation results of the scattering height of the sporation particles 122 of PA6 and PA66 in which the sporation phenomenon was confirmed. Here, for reference, the vapor height by PTFE ablation is also evaluated. It should be noted that the height of the sporation of PA6 and PA66 and the height of only PTFE ablation cannot be simply compared, and are only for reference.

  As described above, according to the above-described sporation evaluation system 100, it is possible to acquire a composite image in which the locus of the sporation particles 122 is clearly displayed. Thereby, the scattering range, scattering height, and density of the sporation particles 122 can be appropriately evaluated. Therefore, it is possible to appropriately select (evaluate) a polymer material that generates the sporlation particles 122 by irradiation with the arc plasma 110a.

  In the above description, a composite image of color images composed of the three primary colors RGB is generated. However, a grayscale composite image may be generated. A grayscale composite image can be generated basically in the same manner as the above method. In the case of gray scale, the color information extraction unit 114a extracts a value with the maximum brightness.

  If the image processing unit 114 is constructed as an image processing program that is independent software, the versatility of the image processing can be enhanced. Such an image processing program includes an image acquisition unit that captures a plurality of images obtained by continuously capturing images of the vicinity of the surface of the polymer material 118 irradiated with the arc plasma 110a at high speed, a color information extraction unit corresponding to the color information extraction unit 114a, The computer is caused to function as a composite image generation unit corresponding to the composite image generation unit 114b.

[Arc extinguishing equipment]
FIG. 7 is a diagram illustrating a schematic configuration of a circuit breaker 130 as an arc extinguishing device according to the present embodiment. As shown in FIG. 7, when the second arc contact 140 (terminal) of the movable contact portion 136 is pulled off from the first arc contact 134 (terminal) of the fixed contact portion 132 of the circuit breaker 130, Arc plasma 110a is generated.

  In the present embodiment, a cylindrical insulating nozzle 138 that surrounds the second arc contactor 140 from the outside is formed of a predetermined polymer material 118 that generates the sporlation particles 122 by the arc plasma 110a. Specifically, it is formed of a polyamide-based synthetic resin (PA6, PA66) that has been confirmed to generate the sporlation particles 122 when irradiated with the arc plasma 110a.

  The predetermined polymer material 118 for generating the sporation particles 122 is located between the first arc contact 134 and the second arc contact 140 (between the terminals), and the position where the generated sporation particles 122 are mixed into the arc plasma 110a. It suffices if they are arranged. Therefore, it is not always necessary to form the entire insulating nozzle 138 with the predetermined polymer material 118, as long as it is provided on at least a part of the inner peripheral surface of the insulating nozzle 138.

  According to the above configuration, the generated sporation particles 122 ablate after entering the inside of the arc plasma 110a (the energy of the arc plasma 110a is used for ablation of the sporation particles 122). The plasma 110a can be cooled and extinguished. It can also be expected that the sporation particles enter the arc plasma and physically divide the arc plasma. This is because the sporation particles 122, which are masses having a mass, have a significantly larger penetration than the ablated gas. As a result, it is possible to ensure a sufficient breaking performance of the circuit breaker 130 without using greenhouse gases as much as possible. As described above, the present invention is characterized in that the sporation particles 122 are positively generated and the arc is extinguished. It has been confirmed with a series of arc horns that the arc plasma 110a can be suitably divided (arc extinguished) by PA6 and PA66.

  In addition, the sporation phenomenon is a phenomenon in which the sporation particles 122 (solid particles) pop out. For this reason, simply applying a predetermined polymer material 118 for generating the sporlation particles 122 on the surface like a coating may cause the material to be consumed at an early stage, resulting in insufficient durability.

  That is, in order to use the sporation phenomenon for arc extinguishing of electric power equipment, it is necessary that a predetermined polymer material for generating the sporation particles 122 is present in a certain volume or more (a predetermined thickness or more). Therefore, ideally, it is preferable that the entire insulating nozzle 138 is made of the predetermined polymer material 118 that generates the spoiling phenomenon.

When a conventional technique such as spraying between terminals of highly insulating CO ₂ gas or the like is used in combination with the arc extinguishing technique using the sporation particles 122 of the present embodiment, a higher arc extinguishing effect is achieved. A plurality of polymer materials 118 may be combined. For example, POM does not cause sporation, but produces a large amount of vapor due to ablation, so it is advantageous to combine. However, in this case, it is necessary to ensure the bonding strength that the joint portion can withstand the internal pressure.

  The above-described sporation evaluation system 100 (scattering range, scattering height, and density evaluation results) can be used to select a predetermined polymer material 118 to be used for arc extinguishing of the circuit breaker 130. Since the sporation phenomenon has not been clearly clarified at present, such a sporation evaluation system 100 is useful. For example, conventionally, carbon phenol (carbon fiber reinforced phenol resin) used in thermal protection materials has been estimated to cause a sporing phenomenon. It is known that 122 is not confirmed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention is used as a sporation evaluation system and an image processing program for evaluating sporation particles, and an arc extinguishing device (breaker, insulator arc horn, etc.) for extinguishing arc plasma between terminals. Can do.

DESCRIPTION OF SYMBOLS 100 ... Sporation evaluation system, 102 ... System control part, 104 ... Memory | storage part, 106 ... Input part, 108 ... Output part, 110 ... Plasma irradiation part, 110a ... Arc plasma, 110b ... Thermal plasma torch, 110c ... Reaction container, 110d ... Observation window, 112 ... Imaging unit, 112a ... High-speed camera, 112b ... Band pass filter, 114 ... Image processing unit, 114a ... Color information extraction unit, 114b ... Composite image generation unit, 116 ... Sporation evaluation unit, 118 ... Polymer material, 120 ... Holder part, 120a ... Sample holder, 122 ... Sporation particles, 130 ... Circuit breaker, 132 ... Fixed contact part, 134 ... First arc contact, 136 ... Movable contact part, 138 ... Insulation Nozzle, 140 ... second arc contact

Claims (3)

A plasma irradiation unit for irradiating a polymer material with arc plasma;
An imaging unit capable of continuously imaging a state near the surface of the polymer material at a high speed;
An image processing unit that processes a plurality of images continuously captured at a high speed and outputs a composite image in which the trajectory of the sporation particles is displayed;
Analyzing the synthesized image, and having a sporation evaluation unit that evaluates at least one of the scattering range or scattering height of the sporation particles, or the density,
The image processing unit generates, for each pixel, a value that maximizes brightness from a plurality of images that are continuously captured at a high speed, and generates the composite image by setting the selected value for each pixel. A system for evaluating a sporation. The plurality of images are color images composed of three primary colors,
The system according to claim 1 , wherein the image processing unit extracts one piece of color information that maximizes the lightness of a specific primary color for each corresponding pixel of the plurality of images. A computer to output a composite image showing the trajectory of the sporation particles,
An image acquisition means for acquiring a plurality of images obtained by continuously imaging the state near the surface of the polymer material irradiated with the arc plasma at a high speed;
Color information extraction means for extracting one color information with the maximum brightness for each corresponding pixel of the plurality of images, and a composite image for generating the composite image by combining the color information extracted for each pixel Generating means,
Image processing program to function as