KR20220126936A - Image quality compensation system of the monitoring camera for hull welding by color separation image and brightness interval - Google Patents

Abstract

To protect vision of a welder, confirm welding work of a hull in real time, and increase quality of the welding work, proposed technology of the present invention relates to an image quality compensating system of a camera for monitoring a color separation image and an image for hull welding for each brightness section. When image distortion occurs due to high brightness while light caused by arc generation in a center unit during the welding work of the hull, provided is a neutral density filter (ND) to perform distortion correction of a real-time welding state and a loss of a corresponding image. By applying the ND filter to image processing to attenuate a wavelength of the high brightness while light, the welder recognizes an arc welding image of the center unit through a display unit in real time. To allow the welder, an assistant, and a field manager to easily monitor work images, the present invention can obtain clear welding images in vulnerable environments for providing the work images by being divided into an infrared area, a RGB color area, and a black and white area for each wavelength band with a color separation lens array. The image quality compensating system comprises: a welding device unit; a sensor and image camera unit; a PC unit; and a remote monitoring and remote controlling unit.

Description

Image quality compensation system of the monitoring camera for hull welding by color separation image and brightness interval}

The present invention relates to a quality compensation system for a monitoring camera of a color separation image and a hull welding image for each brightness section, and the proposed technology of the present invention protects the eyesight of a welder and improves the welding work quality while checking the hull welding work in real time. For the purpose of increasing the ND filter ( Neutral density filter (ND) and bandpass filter are proposed and applied to image processing to attenuate the wavelength of high-brightness white light source so that the welder can recognize the arc welding image in the center through the display unit in real time. In addition, a color separation lens array is applied so that welders, assistants, and site managers can easily observe the work image through the monitor. We propose a quality compensation system for monitoring camera for color separation images and hull welding images for each brightness section that can obtain clearer welding images.

Recently, optical sensors of a vision system using a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, an infrared (Infra-red) sensor, a thermal image sensor, etc. applied to a camera are various. It is widely applied in industrial fields. Among these industrial fields, technologies for monitoring weld images using an image sensor by grafting high-efficiency joint welding technology to high-efficiency joint welding technology among these industries are, for example, melting by installing a camera coaxial with a welding torch in GTA (Gas Tungsten Arc) welding. Various studies have been conducted to measure the width of a part or to control the depth of penetration and monitoring by synchronizing the shutter signal of the CCD (Charge Coupled Device) camera with the welding current signal in GMA (Gas Metal Arc) welding.

On the other hand, the prior art Patent Publication No. KR10-0561084 relates to a welding monitoring method and apparatus, a welding base material display step, a display step of displaying a welding site on the monitoring screen, and a monitoring step of detecting the welding state of the welding base material to be actually welded We propose a welding monitoring method consisting of a status output step of outputting the collected welding quality information on the display and a device including a GUI screen for realizing the welding monitoring method. In addition, conventional KR 10-0706488 relates to a method and apparatus for recording and analyzing real-time welding conditions, and when welding high-strength steel and storing welding conditions to automatically identify the welding state during welding when manufacturing a steel structure where welding quality is important We propose a real-time welding condition recording and analysis method that enables monitoring and analysis of the status of various prescribed welding conditions at the same time. However, in the case of images acquired in real-time during welding, these conventional techniques may distort the actual acquired image of the high luminance region, which is the center region of the weld, only with the RGB color image due to the limitation of the resolution of the image sensor in the region where the arc light is strong. In addition, as the white (white light) noise of the arc light is maximized, the status of the weld and the corresponding image cannot be obtained, so it is not possible to obtain the monitoring of the welding work area efficiently. It can be said that it cannot be grasped by the welding operation, so it can still be said that it has the inconvenience of performing the reconfirmation operation again after performing the welding operation.

However, as in the present invention, as in the present invention, by providing the user with a real-time image without distortion of the color separation image and the welding image for each brightness section through the application of the ND filter to the image quality compensation system and the image quality compensation control of the color separation element, a more efficient hull The quality of the color separation image for welding and the monitoring camera for hull welding by brightness section is differentiated from the prior art and the quality of the color separation image and the monitoring camera for the hull welding image for each brightness section that can check the condition of the welding area by differentiating the quality compensation system from the prior art We would like to propose the structure of the compensation system.

Republic of Korea Patent Registration No. 10-0561084 (2006.03.08.) Republic of Korea Patent No. 10-0706488 (2007.04.04.)

The present invention relates to a picture quality compensation system for solving the problem of the distorted image of the prior art, and the present invention is to apply an ND filter to a distorted welding image due to the noise of white light caused by arc light maximized during welding to obtain white light. In addition to a proposal that allows users to easily check the reduced welding area or welding status with the monitoring display unit during welding work, it is possible to monitor the color separation image for each wavelength band and the hull welding image for each brightness section in real time. To provide a camera quality compensation system. In addition, through image processing correction of the conventional distorted welding image, real-time welding monitoring is secured when performing welding work in the hull and automobile fields, so that the image of the welding state and the welding confirmation image that reduces the image distortion of the arc light can be easily recognized and performed easily. The purpose is that it can be done.

As a technical idea for achieving the present invention, in the image quality compensation system of the monitoring camera for the color separation image and the hull welding image for each brightness section of the present invention, the welding machine unit 200 for performing automated arc welding; and for image shooting An image sensor for sensing incident light for each light source, a thermal image sensor and an infrared sensor for sensing thermal radiation, a sensor and an image camera unit 300 having a beam sensor having a light line display; and an image taken from the sensor and the image camera unit PC unit 400 for correcting the image image; and a remote monitoring and remote control unit 600 for monitoring the welding operation image from the outside through the communication interface 500 for the corrected image through the communication interface 500; do it with

In addition, the welding machine 200 includes a welding head 210 for arc welding; An arc torch unit 220 capable of hybrid hybrid welding; and an XY moving unit 23 having a transfer table to move a welding specimen; and a constant supply of welding power of welding current and voltage during arc welding It characterized in that it further comprises a; welding power supply 240.

In addition, the sensor and image camera unit 300 includes an image camera 310 using an image sensor using an RGB color filter; a thermal imaging camera 320 capable of detecting a thermal temperature and acquiring an image of a thermal spectrum distribution corresponding to thermal radiation; an infrared camera 330 for acquiring an image by detecting infrared light on the surface of a welding object with respect to an image distorted by arc light during arc welding; An infrared line beam 340 for providing a welding movement direction by displaying a welding line as a beam during arc welding; and an image connector unit 350 for electrically connecting the sensor and the image camera unit and the PC unit; characterized in that

In addition, the PC unit 400 includes: an image display unit 410 for dividing the welding captured image by source in real time from the sensor and the image camera unit and displaying it on the display unit; an image storage unit 420 for categorizing and storing the captured images of the real-time source-specific welding images or the primary preliminary photographed images photographed before welding; It characterized in that it further comprises; an image processing unit 430 for image processing the welding images for each source.

In addition, the image processing unit 430 preliminarily captures a target image before arc welding in order to reduce distortion of the welding image due to the maximized arc light during arc welding, and stores it in the image storage unit 420 . a preliminary image acquisition unit 440; a secondary low-illuminance image acquisition unit 450 for acquiring a low-illuminance welding image by taking a short exposure time when the arc welding operation is performed; For the exposure time, a short exposure control is performed by the exposure processing unit 460 , but a high dynamic range image having a high illuminance and a long exposure time is obtained from the primary preliminary image acquisition unit 440 and the infrared line beam constituting a welding line portion 470 that controls the 340 to continuously display a beam on the welding portion; The first preliminary image and the second low-illuminance images further include a welding image matching and matching unit 480 for matching the images with each other; An image distortion correction unit 490 for correcting image distortion by further comprising an ND filter to reduce the light intensity of white noise, which is the image of the arc light, and further comprising a band pass filter for receiving light of a desired wavelength band; and an error notification unit 490-1 for guiding an error when welding in a direction that does not coincide with the welding line by the beam during the welding operation is performed; an image transmission unit 490-2 that processes the distorted image and transmits the image to the remote monitoring and remote control unit 600; The image transmission is transmitted via the communication interface 500; characterized in that it further comprises.

의 투과 파장영역을 갖는 필터를 사용하는 것;을 더 포함하는 것을 특징으로 구성한다.In addition, the secondary low-illuminance image acquisition unit 450 includes an arc light image sensor 450-1 for detecting a welding image with respect to the incident light for each source; an infrared detection sensor 450-2 for detecting an infrared wavelength band; a heat detection sensor 450-3 for detecting a thermal radiation temperature and detecting a distribution spectrum for each temperature; a selection switch 450-4 for a user to select one of the sensors using the incident light for each source and to operate the selected sensor; an exposure time control unit 450-5 for controlling the exposure time by controlling the shutter speed and controlling the exposure time by dividing the high-illuminance welding image and the low-illuminance welding image through long-time and short-time exposure control; an ND filter and bandpass filter control unit 450-6 for controlling the intensity by applying an ND filter and a bandpass filter for reducing the intensity of the arc light to accurately measure the image; The arc light image sensor 450-1 includes a color filter for each RGB pixel, and an RGB filter control unit 450-7 for controlling the optical signal for each RGB pixel; The RGB filter is a CMOS (complementary metal oxide semiconductor) type 10-bit monochromatic sensor with a maximum resolution of 1,024(H)x1,024(H) pixels, and the magnification of the photographed welding image is 7 times, and the bandpass filter is the wavelength of the light source, 532 nm.

Using a filter having a transmission wavelength range of;

In addition, the secondary low-illuminance image acquisition unit 450 classifies the area of the welding object in which the blur caused by the arc light has occurred into a heat distribution spectrum to generate a thermal image, and the classified thermal image is generated by the short-time exposure shutter driver ( 450-10), a thermal image controller 450-9 for removing a threshold value of a white portion of a spectrum of a thermal image by comparing the exposure time with the primary preliminary image; and a first and second image storage unit (450-12) configured to store the removed thermal image.

In addition, the secondary low-illuminance image acquisition unit 450 is a welding image by short-time exposure exposure, and when the welding object moves through the XY transfer unit 230, the object of the secondary low-illuminance image is tracked in the moving direction of the XY transfer unit. The secondary low-light tracking unit 450-11 that tracks the tilting movement direction to match the welding operation direction so as to move the sensor and the image camera unit 300 for tracking an object according to the object tracking so as to obtain a secondary low-light image; It is to propose a quality compensation system of a monitoring camera that further includes a color separation image and an image for hull welding for each brightness section.

The proposed technology of the present invention provides the user with a real-time image without distortion of the color separation image and the welding image for each brightness section through the application of the ND filter to the image quality compensation system and the image quality compensation control of the color separation element, thereby more efficient hull welding It is a hull welding monitoring camera that can perform efficient work to perform and differentiate the image quality compensation system of the monitoring camera for hull welding by color separation image and brightness section from the prior art to check the condition of the welding area with reduced image distortion It has the expected effect of being provided with a clear target image due to the use of the image quality compensation system of

1 is an overall view of the image quality compensation system 100 of the monitoring camera of the color separation image and the hull welding image for each brightness section of the present invention
2 is a block diagram of the welding machine part 200 of the image quality compensation system of the monitoring camera of the color separation image and the image for hull welding by brightness section of the present invention.
3 is a configuration diagram of the sensor and the image camera unit 300 of the image quality compensation system of the monitoring camera for the color separation image and the hull welding image for each brightness section of the present invention.
4 is a configuration diagram of the PC unit 400 of the image quality compensation system of the monitoring camera for the color separation image and the hull welding image for each brightness section of the present invention.
5 is a block diagram of the secondary low-illuminance image acquisition unit 450 of the image quality compensation system of the monitoring camera for color separation images and hull welding images for each brightness section of the present invention.

Hereinafter, the configuration and operation of the embodiment of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 to 5).

1 shows an overall view of the image quality compensation system 100 of the monitoring camera of the color separation image and the hull welding image for each brightness section of the present invention. The image quality compensation system 100 of the monitoring camera for the hull welding image can be divided into five representative components. The technical configuration may be separated into the welding machine unit 200 , the sensor and image camera unit 300 , the PC unit 400 , the communication interface 500 , and the remote monitoring and remote control unit 600 . More specifically, as shown in FIG. 1 , a welding machine unit 200 for performing automated arc welding; and an image sensor for sensing incident light by light source for image capturing, a thermal image sensor and infrared sensor for sensing thermal radiation, and a light line A sensor and an image camera unit 300 having a beam sensor having a display; and a PC unit 400 that corrects an image image taken from the sensor and the image camera unit; and a communication interface 500 for the corrected image ) through a remote monitoring and remote control unit 600 for monitoring the welding operation image from the outside of a remote location; characterized in that it comprises a.

2 is a block diagram of the welding machine unit 200 of the image quality compensation system of the monitoring camera for the color separation image and the hull welding image for each brightness section according to the present invention. A detailed description of the welding machine unit 200 includes a welding head 210 for arc welding; An arc torch unit 220 capable of hybrid hybrid welding; and an XY moving unit 23 having a transfer table to move a welding specimen; and a constant supply of welding power of welding current and voltage during arc welding A welding power supply 240; can be further configured. The welding head 210 may further configure a beam splitter on one side so that a distorted image phenomenon or a blur image phenomenon occurring in a welding specimen during welding may be detected by dividing it into a light signal. In addition, it is possible to further configure the green laser illumination, which is an external illumination unit for combined welding such as arc welding, torch welding, and laser, and through this, it is easy to collect incident light or design a light filter, and the laser light is reflected when irradiated to the welding molten pool. It has the effect of obtaining an accurate welding image by measuring and detecting light.

3 is a configuration diagram of the sensor and the image camera unit 300 of the image quality compensation system of the monitoring camera for the color separation image and the hull welding image for each brightness section according to the present invention.

The sensor and image camera unit 300 includes an image camera 310 using an image sensor using an RGB color filter; a thermal imaging camera 320 capable of detecting a thermal temperature and acquiring an image of a thermal spectrum distribution corresponding to thermal radiation; an infrared camera 330 for acquiring an image by detecting infrared light on the surface of a welding object with respect to an image distorted by arc light during arc welding; An infrared line beam 340 for providing a welding movement direction by displaying a welding line as a beam during arc welding; and an image connector unit 350 for electrically connecting the sensor and the image camera unit and the PC unit; characterized in that At this time, in the case of a welding user or an automatic welding system, it is possible to select a sensor and an image camera unit 300 for each source, and when image distortion occurs if necessary, the infrared camera 330 and the thermal imager 320 are used. can be applied. In addition, when using a general RGB image sensor, it is possible to obtain an accurate welding image by reducing white noise (white blur phenomenon) caused by haze or arc light by using both an ND filter (Neutral density filter, ND) and a bandpass filter.

4 is a block diagram of the PC unit 400 of the image quality compensation system of the monitoring camera for color separation images and hull welding images for each brightness section according to the present invention. The PC unit 400 includes: an image display unit 410 that divides the welding image by source in real time from the sensor and the image camera unit and displays it on the display unit; an image storage unit 420 for categorizing and storing the captured images of the real-time source-specific welding images or the primary preliminary photographed images photographed before welding; It characterized in that it further comprises; an image processing unit 430 for image processing the welding images for each source.

The image processing unit 430 preliminarily captures a target image before arc welding in order to reduce distortion of the welding image due to the maximized arc light during arc welding, and stores the first preliminary image in the image storage unit 420 . an acquisition unit 440; a secondary low-illuminance image acquisition unit 450 for acquiring a low-illuminance welding image by taking a short exposure time when the arc welding operation is performed; For the exposure time, a short exposure control is performed by the exposure processing unit 460 , but a high dynamic range image having a high illuminance and a long exposure time is obtained from the primary preliminary image acquisition unit 440 and the infrared line beam constituting a welding line portion 470 that controls the 340 to continuously display a beam on the welding portion; The first preliminary image and the second low-illuminance images further include a welding image matching and matching unit 480 for matching the images with each other; An image distortion correction unit 490 for correcting image distortion by further comprising an ND filter to reduce the light intensity of white noise, which is the image of the arc light, and further comprising a band pass filter for receiving light of a desired wavelength band; and an error notification unit 490-1 for guiding an error when welding in a direction that does not coincide with the welding line by the beam during the welding operation is performed; an image transmission unit 490-2 that processes the distorted image and transmits the image to the remote monitoring and remote control unit 600; The image transmission is transmitted via the communication interface 500; characterized in that it further comprises.

의 투과 파장영역을 갖는 필터를 사용하는 것;을 더 포함하는 것을 특징으로 구성한다.5 shows the configuration of the secondary low-illuminance image acquisition unit 450 of the image quality compensation system of the monitoring camera of the color separation image and the hull welding image for each brightness section according to the present invention. The secondary low-illuminance image acquisition unit 450 includes an arc light image sensor 450-1 for detecting a welding image with respect to the incident light for each source; an infrared detection sensor 450-2 for detecting an infrared wavelength band; a heat detection sensor 450-3 for detecting a thermal radiation temperature and detecting a distribution spectrum for each temperature; a selection switch 450-4 for a user to select one of the sensors using the incident light for each source and to operate the selected sensor; an exposure time control unit 450-5 for controlling the exposure time by controlling the shutter speed and controlling the exposure time by dividing the high-illuminance welding image and the low-illuminance welding image through long-time and short-time exposure control; an ND filter and bandpass filter control unit 450-6 for controlling the intensity by applying an ND filter and a bandpass filter for reducing the intensity of the arc light to accurately measure the image; The arc light image sensor 450-1 includes a color filter for each RGB pixel, and an RGB filter control unit 450-7 for controlling the optical signal for each RGB pixel; The RGB filter is a CMOS (complementary metal oxide semiconductor) type 10-bit monochromatic sensor with a maximum resolution of 1,024(H)x1,024(H) pixels, and the magnification of the photographed welding image is 7 times, and the bandpass filter is the wavelength of the light source, 532 nm.

Using a filter having a transmission wavelength range of;

The secondary low-illuminance image acquisition unit 450 generates a thermal image by classifying the area of the welding object in which the blur caused by arc light has occurred into a thermal distribution spectrum, and the classified thermal image is generated by the short exposure shutter driver 450- 10) after controlling the shutter speed, the thermal image controller 450-9 compares the exposure time with the primary preliminary image to remove a threshold value of the white portion of the thermal image spectrum; Further comprising; first and second image storage units 450-12 for storing the removed thermal image image, wherein the secondary low-illuminance image acquisition unit 450 is a welding image obtained by short-time exposure exposure, a welding object When moving through the XY transfer unit 230, the tilting movement direction to track and move the sensor and image camera unit 300 for tracking the object according to the movement direction of the XY transfer unit to track the object of the secondary low-illuminance image is the welding operation direction. and a secondary low-light tracking unit 450-11 for tracking so as to obtain a secondary low-illuminance image by matching with the .

In addition, if the image correction method of the distorted image of the image quality compensation system of the monitoring camera that acquires the color separation image and the image for hull welding by each brightness section is described in more detail, the first image is an RGB image camera having a CMOS image sensor Acquiring a first image before welding with 310 and irradiating an infrared line beam to the first image based on the first image, forming a welding line, allows an operator or manager to easily determine the welding direction Recognizes and enables welding operations to be performed. Thereafter, the secondary image acquisition is a step of acquiring a low-illuminance image, and includes a step of acquiring a second low-illuminance image having a short exposure exposure time by shortening the exposure time. In this case, the low-illuminance image represents an image obtained based on short-time exposure of the shutter speed by the shutter driving unit. Thereafter, in order to match and match the obtained first and second images, a step of matching through the image matching (synthesis) and matching unit 480 is performed. At this time, when the intensity of the arc light is maximized and the arc light generating area is viewed in a distorted state, the user or administrator can automatically attach the ND filter and band pass filter to the ND filter and band pass filter control unit 450-6 Arc light can be reduced through Since the ND filter or the bandpass filter can absorb and remove light by dividing it by wavelength band, the present invention provides an ND 16 with a shutter speed of 1/1,000 sec and a ND 32 where the shape of the welding molten pool can be seen well. The case of 1/500sec can be used. In this case, the faster the shutter speed, the more accurate the image can be separated, so the step of configuring and controlling the color separation control unit 450-8 capable of color separation control for each wavelength band is performed. In addition, since the camera image of the temperature distribution obtained by the thermal imaging camera is also an image related to low light, the short exposure shutter driver 450-10 may control the shutter speed to be short and drive it.

The distorted arc light area can be irradiated by dotting the line through the beam so that the center point can be marked from the welding base material, and the beam can guide the welding direction by using the welding line part 470 to mark the line. and marking the central point of the distorted arc light region so as to Afterwards, when the XY transfer unit moves based on the line irradiated to the beam, in order to align the matched line, the XY position error is detected and the XY transfer line is aligned through position comparison. The XY transfer unit may align the lines of the welding operation through tilting control of the imaging camera like the position movement of the XY transfer unit for more precise positioning. At this time, the tilting control has a step of performing object tracking by applying an object tracking algorithm to move the XY moving unit or automatically move each image camera. The object can be tracked by tracking the point where the arc region of the welding area occurs and the target object to which the welding base material moves. When the work progress direction of the welding base material is detected as the photographing position of the camera and the distorted image, the error may be guided through the welding error notification unit 490-1, and the guidance is provided by the remote monitoring and remote control unit 600 Steps to make it recognizable using lighting in audio or visual notification state. Displaying the distorted image on the display unit of the remote control unit 600 is performed, and at this time, the intensity of the arc light, which is the distorted image, is determined in the PC unit 400, and based on this, haze, arc light and image blur When the phenomenon of These images of incident light by source can be selectively applied to the welding worker by selecting the welding image, and in the case of torch welding without arc, a thermal imaging camera is applied and the image can be displayed separately to the user or manager through the spectrum image by heat temperature. screen division and displaying an image for each thermal temperature on the display unit. In addition, in order to display the distorted image in a user-customized manner, a color separation lens array may be applied by the color separation control unit 450-8 to provide an infrared region, an RGB color region, and a black-and-white region for each wavelength band. This is a color separation image that can obtain a clearer welding image even in a vulnerable environment through classification by wavelength band with RGB color filter, infrared light, near infrared light, and far infrared light, and a monitoring camera image quality compensation system for hull welding images by brightness section. can provide

The above embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

410 image display unit 420 image storage unit
430 Image processing unit 440 Primary preliminary image acquisition unit
450 Secondary low-light image acquisition unit 460 Exposure processing unit
470 Welding line part 480 Image registration and matching part
490 Image distortion correction unit

Claims (7)

In the image quality compensation system of the monitoring camera of the color separation image and the hull welding image for each brightness section,
Welder unit 200 for performing automated arc welding; and
An image sensor for sensing incident light for each light source for image capturing, a thermal image sensor and an infrared sensor for sensing thermal radiation, a sensor having a beam sensor having a light line display, and an image camera unit 300; and
PC unit 400 for correcting the image image captured by the sensor and the image camera unit; and
A remote monitoring and remote control unit 600 for monitoring the welding operation image from the outside of a remote location through the communication interface 500 for the corrected image to obtain a color separation image and a hull welding image for each brightness section, including a Image quality compensation system for monitoring cameras.
The method of claim 1,
The welding machine 200 is
a welding head 210 for arc welding; An arc torch unit 220 capable of hybrid hybrid welding; and an XY moving unit 23 having a transfer table to move a welding specimen; and a constant supply of welding power of welding current and voltage during arc welding Welding power supply 240; further comprising a color separation image and image quality compensation system of a monitoring camera to obtain an image for welding the hull for each brightness section.
The method of claim 1,
The sensor and video camera unit 300 is
an image camera 310 using an image sensor using an RGB color filter; a thermal imaging camera 320 capable of detecting a thermal temperature and acquiring an image of a thermal spectrum distribution corresponding to thermal radiation; an infrared camera 330 for acquiring an image by detecting infrared light on the surface of a welding object with respect to an image distorted by arc light during arc welding; An infrared line beam 340 for providing a welding movement direction by displaying a welding line as a beam during arc welding; and an image connector unit 350 for electrically connecting the sensor and the image camera unit and the PC unit; The image quality compensation system of the monitoring camera for acquiring the color separation image and the hull welding image for each brightness section, characterized in that.
The method of claim 1,
The PC unit 400 is
an image display unit 410 for dividing the welding image by source in real time from the sensor and the image camera unit and displaying it on the display unit; an image storage unit 420 for categorizing and storing the captured images of the real-time source-specific welding images or the primary preliminary photographed images photographed before welding; The image processing unit 430 for image processing the welding captured images for each source; the image quality compensation system of the monitoring camera for acquiring the color separation image and the hull welding image for each brightness section, characterized in that it further comprises.
5. The method of claim 4,
The image processing unit 430 is
In order to reduce the distortion of the welding image due to the arc light maximized during arc welding, the first preliminary image acquisition unit 440 for pre-photographing the target image before the arc welding and storing it in the image storage unit 420; a secondary low-illuminance image acquisition unit 450 for acquiring a low-illuminance welding image by taking a short exposure time when the arc welding operation is performed; For the exposure time, a short exposure control is performed by the exposure processing unit 460 , but a high dynamic range image having a high illuminance and a long exposure time is obtained from the primary preliminary image acquisition unit 440 and the infrared line beam constituting a welding line portion 470 that controls the 340 to continuously display a beam on the welding portion; The first preliminary image and the second low-illuminance images further include a welding image matching and matching unit 480 for matching the images with each other; An image distortion correction unit 490 for correcting image distortion by further comprising an ND filter to reduce the light intensity of white noise, which is the image of the arc light, and further comprising a band pass filter for receiving light of a desired wavelength band; and an error notification unit 490-1 for guiding an error when welding in a direction that does not coincide with the welding line by the beam during the welding operation is performed; an image transmission unit 490-2 that processes the distorted image and transmits the image to the remote monitoring and remote control unit 600; The image transmission is transmitted via the communication interface 500; The image quality compensation system of the monitoring camera for acquiring the color separation image and the hull welding image for each brightness section, characterized in that it further comprises.
6. The method of claim 5,
The secondary low-illuminance image acquisition unit 450 is
an arc light image sensor 450-1 for detecting a welding image with respect to incident light for each source; an infrared detection sensor 450-2 for detecting an infrared wavelength band; a heat detection sensor 450-3 for detecting a thermal radiation temperature and detecting a distribution spectrum for each temperature; a selection switch 450-4 for a user to select one of the sensors using the incident light for each source and to operate the selected sensor; an exposure time control unit 450-5 for controlling the exposure time by controlling the shutter speed and controlling the exposure time by dividing the high-illuminance welding image and the low-illuminance welding image through long-time and short-time exposure control; an ND filter and bandpass filter control unit 450-6 for controlling the intensity by applying an ND filter and a bandpass filter for reducing the intensity of the arc light to accurately measure the image; The arc light image sensor 450-1 includes a color filter for each RGB pixel, and an RGB filter control unit 450-7 for controlling the optical signal for each RGB pixel; The RGB filter is a CMOS (complementary metal oxide semiconductor) type 10-bit monochromatic sensor with a maximum resolution of 1,024(H)x1,024(H) pixels, and the magnification of the photographed welding image is 7 times, and the bandpass filter is the wavelength of the light source, 532 nm.

Using a filter having a transmission wavelength range of; The image quality compensation system of the monitoring camera for acquiring the color separation image and the hull welding image for each brightness section, characterized in that it further comprises.
7. The method of claim 6,
The secondary low-illuminance image acquisition unit 450 is
After generating a thermal image by classifying the area of the welding object in which the blur caused by arc light has occurred into a thermal distribution spectrum, and controlling the shutter speed of the classified thermal image by the shutter driver 450-10 for short-time exposure, a thermal image controller 450-9 for comparing the exposure time with the primary preliminary image to remove a threshold value of a white portion of a spectrum of the thermal image; Quality compensation of the monitoring camera for acquiring the color separation image and the hull welding image for each brightness section, characterized in that it further comprises; first and secondary image storage units (450-12) for storing the removed thermal image image system.

Images