Welding device

Abstract

A welding device according to embodiments of the present disclosure includes a laser unit that irradiates a laser of a first wavelength toward a welding target, an illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target, a first camera that receives light of the second wavelength reflected from the welding target to generate a first image, and a second camera that receives light of the second wavelength reflected from the welding target to generate a second image, wherein the generation section of the first image and the generation section of the second image intersect.

Description

Technology Field

[0001] The embodiments of the present disclosure relate to a welding apparatus. Background Technology

[0002] Welding processes utilizing lasers and cameras offer the advantage of providing high precision while operating at high speeds. In particular, higher camera resolution allows for the selection of more precise welding positions. Since it is crucial to evaluate the welding status in real-time through high-speed filming during the welding process, both camera resolution and frame rate must be improved simultaneously.

[0003] However, increasing camera resolution tends to lower the frame rate, making it difficult to improve both aspects simultaneously. In other words, if you attempt a more precise evaluation of the weld condition by increasing the frame rate, there is a risk that the reduced resolution will compromise the precision of weld location selection. The problem to be solved

[0004] According to one aspect of the present disclosure, by cross-photographing a welding target using a plurality of cameras, the welding condition is evaluated more precisely and the accuracy in selecting the welding location is improved.

[0005] According to another aspect of the present disclosure, a wider field of view is secured by using a plurality of cameras to align the shooting areas of a welding target differently and shooting simultaneously.

[0006] According to another aspect of the present disclosure, various welding conditions of a welding target are to be precisely evaluated using illumination of different wavelengths and cameras that recognize them. means of solving the problem

[0007] A welding device according to embodiments of the present disclosure comprises: a laser unit that irradiates a laser of a first wavelength toward a welding target; an illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a first camera that receives light of the second wavelength reflected from the welding target and generates a first image; and a second camera that receives light of the second wavelength reflected from the welding target and generates a second image, wherein the generation interval of the first image and the generation interval of the second image intersect.

[0008] The apparatus further includes a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal may be in the form of the first trigger signal delayed by the length of the generation interval of the first image.

[0009] When the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera is turned off, and the generation period of the second image may overlap with the transmission period of the first image and the turn-off period of the first camera.

[0010] The lengths of the generation interval of the first image and the transmission interval of the first image may be the same.

[0011] It may further include: a beam splitter that separates the light of the second wavelength reflected from the welding target and transmits it to the first camera and the second camera, respectively; a scanner that adjusts the propagation direction of the laser and the light of the second wavelength reflected from the welding target; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength reflected from the welding target from the scanner; and a second mirror that receives the light of the second wavelength from the first mirror and transmits it to the beam splitter.

[0012] The light of the second wavelength, separated by the beam splitter and transmitted to the first camera and the second camera, may have the same phase.

[0013] The above second wavelength may be included in a range of 400 nm or more and 700 nm or less.

[0014] A welding device according to embodiments of the present disclosure comprises: a laser unit that irradiates a laser of a first wavelength toward a welding target; an illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a first camera that receives the light of the second wavelength reflected from the welding target and generates a first image; a second camera that receives the light of the second wavelength reflected from the welding target and generates a second image; a third camera that receives the light of the second wavelength reflected from the welding target and generates a third image; and a fourth camera that receives the light of the second wavelength reflected from the welding target and generates a fourth image, wherein the intervals in which each of the first to fourth images is generated are repeated sequentially without overlapping with one another.

[0015] The method further includes a data processing device that controls the first to fourth cameras by supplying a first trigger signal to the first camera, supplying a second trigger signal to the second camera, supplying a third trigger signal to the third camera, and supplying a fourth trigger signal to the fourth camera, wherein the first trigger signal is in the form of a pulse, the second trigger signal is in the form of the first trigger signal delayed by the length of the generation interval of the first image, the third trigger signal is in the form of the second trigger signal delayed by the length of the generation interval of the second image, and the fourth trigger signal is in the form of the third trigger signal delayed by the length of the generation interval of the third image.

[0016] When the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the fourth trigger signal is at a high level, the fourth camera generates the fourth image and transmits the generated fourth image to the data processing device, and when the fourth trigger signal is at a low level, the fourth camera is turned off, and the generation interval of the fourth image may overlap with the transmission interval of the first image and the turn-off interval of the first camera.

[0017] A welding device according to embodiments of the present disclosure comprises: a laser unit that irradiates a laser of a first wavelength toward a welding target; a first illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a second illumination unit that irradiates light of a third wavelength different from the first wavelength and the second wavelength onto the laser irradiation area of ​​the welding target; a first camera that receives light of the second wavelength reflected from the welding target and generates a first image; and a second camera that receives light of the third wavelength reflected from the welding target and generates a second image, wherein the generation interval of the first image and the generation interval of the second image intersect.

[0018] The apparatus further includes a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal may be in the form of the first trigger signal delayed by the length of the generation interval of the first image.

[0019] When the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera is turned off, and the generation period of the second image may overlap with the transmission period of the first image and the turn-off period of the first camera.

[0020] The apparatus may further include: a scanner that adjusts the propagation direction of the laser, the light of the second wavelength reflected from the welding target, and the light of the third wavelength reflected from the welding target; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength and the light of the third wavelength reflected from the welding target from the scanner; a second mirror that transmits the light of the second wavelength received from the first mirror to the first camera and transmits the light of the third wavelength received from the first mirror; and a third mirror that transmits the light of the third wavelength received from the second mirror to the second camera.

[0021] The second wavelength above may be included in a range of 400 nm or more and 700 nm or less, and the third wavelength above may be included in a range of 200 nm or more and 400 nm or less.

[0022] A welding device according to embodiments of the present disclosure comprises: a laser unit that irradiates a laser of a first wavelength toward a welding target; a first illumination unit that irradiates light of a second wavelength different from the first wavelength to a first area of ​​the welding target; a second illumination unit that irradiates light of a third wavelength different from the first wavelength and the second wavelength to a second area of ​​the welding target different from the first area; a first camera that receives light of the second wavelength reflected from the first area of ​​the welding target and generates a first image; and a second camera that receives light of the third wavelength reflected from the second area of ​​the welding target and generates a second image, wherein the generation interval of the first image and the generation interval of the second image overlap.

[0023] The apparatus further includes a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and supplying a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal may have the same phase as the first trigger signal.

[0024] When the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera can be turned off.

[0025] The apparatus may further include: a scanner that adjusts the propagation direction of the laser, the light of the second wavelength reflected from the first region, and the light of the third wavelength reflected from the second region; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength reflected from the first region and the light of the third wavelength reflected from the second region from the scanner; a second mirror that receives the light of the second wavelength reflected from the first region from the first mirror and transmits it to the first camera, and receives and transmits the light of the third wavelength reflected from the second region from the first mirror; and a third mirror that receives the light of the third wavelength reflected from the second region from the second mirror and transmits it to the second camera.

[0026] The second wavelength and the third wavelength may each be included in a range of 400 nm or more and 700 nm or less. Effects of the invention

[0027] According to one embodiment of the present disclosure, by cross-photographing a welding target using a plurality of cameras, the welding condition can be evaluated more precisely and the accuracy in selecting the welding position can be improved.

[0028] According to another embodiment of the present disclosure, a wider field of view can be secured by using a plurality of cameras to align the shooting areas of a welding target differently and shooting simultaneously.

[0029] According to another aspect of the present disclosure, various welding conditions of a welding target can be precisely evaluated using illumination of different wavelengths and cameras that recognize them. Brief explanation of the drawing

[0030] FIG. 1 is a perspective view showing a welding device according to the first and second embodiments. FIG. 2 is a cross-sectional view along line I-I' of the welding device of FIG. 1 according to the first embodiment. Figure 3 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of Figure 2. Figure 4 is a diagram illustrating the path of a laser and light of a second wavelength traveling within the welding device of Figure 2. Figures 5a and 5b are timing diagrams to explain the effect of the welding device of Figure 2. FIG. 6 is a cross-sectional view along line I-I' of the welding device of FIG. 1 according to a second embodiment. Figure 7 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of Figure 6. Figure 8 is a diagram illustrating the path of a laser and light of a second wavelength traveling within the welding device of Figure 6. Figure 9 is a timing diagram to explain the effect of the welding device of Figure 6. FIG. 10 is a perspective view showing a welding device according to the third and fourth embodiments. FIG. 11 is a cross-sectional view along the line II-II' of the welding device of FIG. 10. FIG. 12 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of FIG. 10. FIG. 13 is a diagram illustrating the paths of a laser, light of a second wavelength, and light of a third wavelength within the welding device of FIG. 10 according to a third embodiment. FIG. 14 is a timing diagram for explaining the effect of the welding device of FIG. 10 according to the third embodiment. FIG. 15 is a diagram illustrating the paths of a laser, light of a second wavelength, and light of a third wavelength within the welding device of FIG. 10 according to a fourth embodiment. FIG. 16 is a timing diagram for explaining the effect of the welding device of FIG. 10 according to the fourth embodiment. Specific details for implementing the invention

[0031] Preferred embodiments of the present disclosure are described in detail below with reference to the attached drawings. The configuration of the device or the control method described below are intended only to explain the embodiments of the present disclosure and are not intended to limit the scope of the rights of the present disclosure, and reference numerals used identically throughout the specification indicate identical components.

[0032] Meanwhile, the battery assembly according to the present disclosure is a collective concept for a battery module, a battery pack, and an energy storage system. The battery module refers to a battery assembly in which a plurality of battery cells are bundled into one or more units and placed in a case to protect them from external shocks, heat, vibration, etc. Furthermore, the battery pack refers to a battery assembly that accommodates a predetermined number of the battery modules to achieve a desired voltage or power.

[0033] In addition, the battery assembly according to the present disclosure may refer to a battery pack having a Cell To Pack (CTP) structure that generates a desired voltage or power by accommodating a plurality of battery cells in a predetermined number while omitting the battery module.

[0035] FIG. 1 is a perspective view showing a welding device according to the first and second embodiments.

[0036] Referring to FIG. 1, a welding device (100) according to the first and second embodiments may include a frame (110), a lens part (120), and a lighting part (130).

[0037] The frame (110) may have a three-dimensional shape extending in a first direction (DR1), a second direction (DR2) intersecting the first direction (DR1), and a third direction (DR3) intersecting the first direction (DR1) and the second direction (DR2). For example, as shown in FIG. 1, the frame (110) may be in the shape of a rectangular prism, but the embodiments of the present disclosure are not necessarily limited thereto.

[0038] A lens portion (120) may be attached to one side of the frame (110) (e.g., the lower side of the frame (110)). The lens portion (120) may serve to focus the laser emitted from inside the frame (110) to the outside so that it can be accurately irradiated onto the intended area of ​​the welding target. Additionally, the lens portion (120) may also serve to provide a path through which light reflected from the welding target and incident into the frame (110) can pass.

[0039] A lighting unit (130) that irradiates light toward a welding target may be disposed on one side (e.g., the lower side of the frame (110)) of the frame (110) to which the lens unit (120) is attached.

[0040] The light emitted from the lighting unit (130) can be reflected from the welding target and enter the frame (110) through the lens unit (120).

[0041] In the embodiments of the present disclosure, the light irradiated from the lighting unit (130) may be visible light, but this is merely an example, and the light irradiated from the lighting unit (130) may be ultraviolet or infrared light.

[0042] A welding device (100) according to embodiments of the present disclosure can confirm an accurate welding position through a camera and, based on this information, irradiate a laser at an appropriate welding position to proceed with welding. The position and intensity of the laser can be adjusted according to the progress of the welding.

[0043] When using only one high-resolution camera, precise verification of the welding position is possible, but the frame rate may slow down due to the large amount of data to be processed. Consequently, it may be difficult to identify the welding position in real time. On the other hand, a low-resolution camera can be used to identify the welding position in real time, but in this case, it may be difficult to precisely verify the welding position. The welding device (100) according to the embodiments of the present disclosure can evaluate the welding condition more precisely and improve the accuracy of welding position selection by cross-photographing the welding target using a plurality of cameras.

[0045] FIG. 2 is a cross-sectional view along line I-I' of the welding device of FIG. 1 according to the first embodiment.

[0046] Referring to FIG. 2, the welding device (100) may include a frame (110), a lens unit (120), and a lighting unit (130). Details regarding the lens unit (120) and the lighting unit (130) that overlap with the description with reference to FIG. 1 are omitted below.

[0047] The frame (110) forms an internal space, and a central control unit (111), a data processing unit (112), a data conversion unit (113), a laser unit (114), a camera unit (115), a scanner (116), a mirror unit (117), and a beam splitter (118) may be arranged in the internal space of the frame (110).

[0048] The camera unit (115) may include a plurality of cameras. For example, the camera unit (115) may include a first camera (115a) and a second camera (115b).

[0049] The mirror section (117) may include a plurality of mirrors. For example, the mirror section (117) may include a first mirror (117a) and a second mirror (117b).

[0050] The central control unit (111) can perform the role of controlling the data processing unit (112), the laser unit (114), the scanner (116), and the lighting unit (130). For example, the central control unit (111) can control the angle of the scanner (116), etc., to adjust the direction of propagation of the laser or light within the frame (110). For example, the central control unit (111) can control the intensity, wavelength, and phase of the laser emitted from the laser unit (114). For example, the central control unit (111) can control the on / off of the lighting unit (130) to control whether the lighting unit (130) emits light or not. Furthermore, the central control unit (111) can control the data processing unit (112) to transmit control signals (e.g., trigger signals) to the camera unit (115).

[0051] The data processing unit (112) can supply control signals (e.g., trigger signals) to the camera unit (115) under the control of the central control unit (111). The data processing unit (112) can determine the welding status (e.g., degree of welding progress, etc.) based on the information signals transmitted through the camera unit (115) and the data conversion unit (113).

[0052] The data conversion device (113) can transmit control signals (e.g., trigger signals) supplied from the data processing device (112) to the camera unit (115). The data conversion device (113) can perform the function of processing images transmitted from the camera unit (115). For example, the data conversion device (113) can capture still images from the images. For example, if the images are generated from an analog camera, the data conversion device (113) can convert them into digital signals so that they can be processed by a computer. For example, after processing the images transmitted from the camera unit (115), the data conversion device (113) can transmit them to another device (e.g., the data processing device (112)).

[0053] The laser unit (114) can irradiate lasers of various wavelengths, intensities, and phases according to the control of the central control unit (111). For example, if it is necessary to increase the welding speed by evaluating the welding status of the welding target in real time, the intensity of the laser emitted from the laser unit (114) is increased. The laser irradiated from the laser unit (114) can be reflected by the first mirror (117a) and travel in a specific direction.

[0054] The camera unit (115) can receive light reflected from the welding target and generate images. Here, the images can be used as data showing the welding status of the welding target. The first camera (115a) can receive light reflected from the welding target and generate a first image. The second camera (115b) can receive light reflected from the welding target and generate a second image. The images generated by the camera unit (115) are transmitted to the data processing unit (112) via the data conversion device (113) and can be used to evaluate the welding status in real time.

[0055] The interval during which the first camera (115a) generates the first image and the interval during which the second camera (115b) generates the second image may be separated in time. More specifically, the interval during which the first camera (115a) generates the first image and the interval during which the second camera (115b) generates the second image may intersect. While the first camera (115a) generates the first image, the second camera (115b) may not generate the second image, and while the second camera (115b) generates the second image, the first camera (115a) may not generate the first image.

[0056] The interval during which the first camera (115a) generates the first image may overlap with the interval during which the second camera (115b) transmits the generated second image to the data processing device (112) and the interval during which the second camera (115b) is turned off.

[0057] Likewise, the interval during which the second camera (115b) generates the second image may overlap with the interval during which the first camera (115a) transmits the generated first image to the data processing device (112) and the interval during which the first camera (115a) is turned off.

[0058] A welding device (100) according to the first embodiment of the present disclosure can double the frame rate compared to generating images with a single camera by cross-generating images using a first camera (115a) and a second camera (115b). For example, if the frame rate of each of the first camera (115a) and the second camera (115b) of the welding device (100) is 30Hz, the camera unit (115) can generate images at a frame rate of 60Hz. The effects of such a welding device (100) will be described in detail later with reference to FIGS. 5a and 5b.

[0059] The scanner (116) can be controlled by the central control unit (111) to adjust the direction of travel of the laser transmitted from the first mirror (117a) so that it is accurately irradiated to a desired area of ​​the welding target. Additionally, the scanner (116) can adjust the direction of travel of the light reflected from the welding target so that it is accurately transmitted to the camera unit (115) via the first mirror (117a) and the second mirror (117b).

[0060] In the embodiments, the scanner (116) can control the direction of travel by reflecting the light reflected from the laser and the welding object in a desired direction. However, the embodiments of the present disclosure are not necessarily limited thereto. The scanner (116) can control the direction of travel of the light reflected from the laser and the welding object in various ways.

[0061] The mirrors included in the mirror section (117) may be dichroic mirrors that reflect light of a specific wavelength and transmit light of another wavelength through a special coating. The first mirror (117a) can reflect the laser irradiated from the laser section (114) and transmit it to the scanner (116). On the other hand, the first mirror (117a) can transmit light that is reflected from the welding object and transmitted through the lens section (120) and the scanner (116) as is. The light that passes through the first mirror (117a) can be reflected by the second mirror (117b) and transmitted to the beam splitter (118).

[0062] The beam splitter (118) can separate the light transmitted from the second mirror (117b) and transmit it to the first camera (115a) and the second camera (115b), respectively. The light separated by the beam splitter (118) may have the same properties. For example, the phase of the light transmitted from the beam splitter (118) to the first camera (115a) and the phase of the light transmitted from the beam splitter (118) to the second camera (115b) may be the same.

[0063] In FIG. 2, the paths of light separated from the beam splitter (118) are shown intersecting each other, but the embodiments of the present disclosure are not necessarily limited thereto.

[0064] In the welding process using the welding device (100), the first camera (115a) and the second camera (115b) each receive the same light from the beam splitter (118). While the first camera (115a) generates a first image using the received light, the second camera (115b) may transmit the generated second image to the data processing device (112) or be in a turned-off state (or a stopped state). Conversely, while the second camera (115b) generates a second image using the received light, the first camera (115a) may transmit the generated first image to the data processing device (112) or be in a turned-off state (or a stopped state). As a result, the first image and the second image show the appearance of the welding target at different times, and the appearance of the welding target can be continuously checked.

[0066] Figure 3 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of Figure 2.

[0067] Referring to FIGS. 2 and 3, a welding device (100) may include a laser unit (114) that irradiates a laser of a first wavelength toward a welding target, a lighting unit (130) that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target, a first camera (115a) that receives light of the second wavelength reflected from the welding target to generate a first image, and a second camera (115b) that receives light of the second wavelength reflected from the welding target to generate a second image.

[0068] Additionally, the welding device (100) may include a beam splitter (118) that separates light of a second wavelength reflected from a welding target and transmits it to a first camera (115a) and a second camera (115b), respectively; a scanner (116) that adjusts the direction of propagation of the laser and light of a second wavelength reflected from the welding target; a first mirror (117a) that receives the laser from the laser unit (114) and transmits it to the scanner (116), and receives and transmits light of a second wavelength reflected from the welding target from the scanner (116); and a second mirror (117b) that receives light of a second wavelength from the first mirror (117a) and transmits it to the beam splitter (118).

[0069] The central control unit (111) can perform the role of managing and controlling the operation of the data processing unit (112), the laser unit (114), the scanner (116), and the lighting unit (130). For example, the central control unit (111) can transmit a data control signal (DCS) to the data processing unit (112) to control the data processing unit (112) to transmit control signals (e.g., a first trigger signal (TS1), a second trigger signal (TS2), and a data conversion unit control signal (FCS)) to the data conversion unit (113). For example, the central control unit (111) can transmit a scanner control signal (SCS) to the scanner (116) to control the angle of the scanner (116), etc. For example, the central control unit (111) can transmit a first lighting unit control signal (LCS1) to the lighting unit (130) to control the on / off of the lighting unit (130) and control whether the lighting unit (130) irradiates light of a second wavelength or not. For example, the central control unit (111) can control the laser unit (114) to control the intensity, wavelength, and phase of the laser emitted from the laser unit (114).

[0070] The data processing device (112) can generate and supply a data conversion device control signal (FCS), a first trigger signal (TS1), and a second trigger signal (TS2) to the data conversion device (113) under the control of the central control unit (111). The first trigger signal (TS1) is a signal for controlling the operation of the first camera (115a) and can be supplied to the first camera (115a) via the data conversion device (113). The second trigger signal (TS2) is a signal for controlling the operation of the second camera (115b) and can be supplied to the second camera (115b) via the data conversion device (113). The operation of the first camera (115a) and the second camera (115b) according to the first trigger signal (TS1) and the second trigger signal (TS2) will be described later with reference to FIG. 5b.

[0071] The first image (I1) generated by the first camera (115a) and the second image (I2) generated by the second camera (115b) can each be transmitted to a data conversion device (113). The data conversion device (113) can generate a first information signal (IS1) by converting the first image (I1) to the format of the data processing device (112) so that the data processing device (112) can use it to determine the welding status (e.g., degree of welding progress, etc.). The data conversion device (113) can generate a second information signal (IS2) by converting the second image (I2) to the format of the data processing device (112). The generated first and second information signals (IS1, IS2) are transmitted to the data processing device (112), and the data processing device (112) can determine the welding status based on the transmitted first and second information signals (IS1, IS2).

[0073] Figure 4 is a diagram illustrating the path of a laser and light of a second wavelength traveling within the welding device of Figure 2.

[0074] Referring to FIGS. 2 and 4, a laser of a first wavelength emitted from the laser unit (114) can be reflected by the first mirror (117a) and transmitted to the scanner (116). Subsequently, the laser can be reflected again from the scanner (116), pass through the lens unit (120), and be accurately irradiated onto a desired area of ​​the welding target (10).

[0075] Light (L1) of a second wavelength emitted from the illumination unit (130) can be reflected from the welding target (10) and transmitted to the scanner (116) via the lens unit (120). Here, the second wavelength may be included in a range of 400 nm or more and 700 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto. Here, the second wavelength may be different from the first wavelength.

[0076] Subsequently, the light of the second wavelength (L1) can be reflected again from the scanner (116), pass through the first mirror (117a), and be transmitted to the second mirror (117b). After that, the light of the second wavelength (L1) can be reflected from the second mirror (117b), separated by the beam splitter (118), and transmitted to the first camera (115a) and the second camera (115b).

[0077] The light of the second wavelength (L1) separated from the beam splitter (118) and transmitted to the first camera (115a) and the second camera (115b) may have the same properties. For example, the light of the second wavelength (L1) separated from the beam splitter (118) and transmitted to the first camera (115a) and the second camera (115b) may have the same phase.

[0079] FIGS. 5A and FIGS. 5B are timing diagrams for explaining the effects of the welding device of FIG. 2. FIG. 5B is a timing diagram showing a first trigger signal (TS1) and a second trigger signal (TS2) supplied to a first camera (115a) and a second camera (115b) in a welding device (100) according to a first embodiment. On the other hand, FIG. 5A is a timing diagram showing a first trigger signal (TS1) supplied to a camera when the welding device includes one camera.

[0080] Referring to FIG. 5a, the first trigger signal (TS1) may be in the form of a pulse. When the first trigger signal (TS1) is at a high level, a single camera can receive light reflected from a welding target to generate an image and transmit the generated image to a data processing device (112). And when the first trigger signal (TS1) is at a low level, the single camera can be turned off and stop operation.

[0081] The first to third effective intervals (EP1~EP3) may correspond to intervals where a single camera generates images. The first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where a single camera transmits the generated images to a data processing device (112). The first and second turn-off intervals (DP1, DP2) may correspond to intervals where a single camera is turned off and stops operating.

[0082] In the first effective period (EP1), a single camera can receive light reflected from a welding target and generate an image. In the subsequent first ineffective period (NEP1), the generated image can be transmitted to a data processing device (112). In the subsequent first turn-off period (DP1), the single camera can be turned off.

[0083] In the second effective period (EP2), a single camera can receive light reflected from a welding target and generate an image. In the subsequent second ineffective period (NEP2), the generated image can be transmitted to a data processing device (112). In the subsequent second turn-off period (DP2), the single camera can be turned off.

[0084] In the third effective period (EP3), a single camera can receive light reflected from the welding target and generate an image. In the subsequent third ineffective period (NEP3), the generated image can be transmitted to a data processing device (112). In this way, a single camera can receive light reflected from the welding target, generate an image, and transmit it to a data processing device (112).

[0085] Referring to FIG. 5b, the first trigger signal (TS1) is supplied to the first camera (115a) to act as a control signal, and the second trigger signal (TS2) is supplied to the second camera (115b) to act as a control signal.

[0086] Each of the first trigger signal (TS1) and the second trigger signal (TS2) may be in the form of a pulse. As illustrated in FIG. 5b, each of the first trigger signal (TS1) and the second trigger signal (TS2) may be in the form of a square pulse, but embodiments of the present disclosure are not necessarily limited thereto.

[0087] When the first trigger signal (TS1) is at a high level, the first camera (115a) generates a first image and transmits the generated first image to a data processing device (112), and when the first trigger signal (TS1) is at a low level, the first camera (115a) can be turned off.

[0088] When the second trigger signal (TS2) is at a high level, the second camera (115b) generates a second image and transmits the generated second image to a data processing device (112), and when the second trigger signal (TS2) is at a low level, the second camera (115b) can be turned off.

[0089] In the first trigger signal (TS1), the first to third effective intervals (EP1~EP3) may correspond to intervals where the first camera (115a) generates first images. In the first trigger signal (TS1), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the first camera (115a) transmits the generated first images to a data processing device (112). In the first trigger signal (TS1), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the first camera (115a) is turned off and stops operating.

[0090] In the first effective period (EP1) of the first trigger signal (TS1), the first camera (115a) can receive light reflected from the welding target and generate a first image. In the subsequent first ineffective period (NEP1), the generated first image can be transmitted to a data processing device (112). In the subsequent first turn-off period (DP1), the first camera (115a) can be turned off.

[0091] In the second effective period (EP2) of the first trigger signal (TS1), the first camera (115a) can receive light reflected from the welding target and generate a first image. In the subsequent second ineffective period (NEP2), the generated first image can be transmitted to a data processing device (112). In the subsequent second turn-off period (DP2), the first camera (115a) can be turned off.

[0092] In the third effective period (EP3) of the first trigger signal (TS1), the first camera (115a) can receive light reflected from the welding target and generate a first image. In the subsequent third ineffective period (NEP3), the generated first image can be transmitted to the data processing device (112). In this way, the first camera (115a) can receive light reflected from the welding target, generate a first image, and transmit it to the data processing device (112).

[0093] In the second trigger signal (TS2), the first to third effective intervals (EP1~EP3) may correspond to intervals where the second camera (115b) generates second images. Also, in the second trigger signal (TS2), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the second camera (115b) transmits the generated second images to the data processing device (112). Also, in the second trigger signal (TS2), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the second camera (115b) is turned off and stops operating.

[0094] In the first effective period (EP1) of the second trigger signal (TS2), the second camera (115b) can receive light reflected from the welding target and generate a second image. In the subsequent first ineffective period (NEP1), the generated second image can be transmitted to the data processing device (112). In the subsequent first turn-off period (DP1), the second camera (115b) can be turned off.

[0095] In the second effective period (EP2) of the second trigger signal (TS2), the second camera (115b) can receive light reflected from the welding target and generate a second image. In the subsequent second ineffective period (NEP2), the generated second image can be transmitted to the data processing device (112). In the subsequent second turn-off period (DP2), the second camera (115b) can be turned off.

[0096] In the third effective period (EP3) of the second trigger signal (TS2), the second camera (115b) can receive light reflected from the welding target and generate a second image. In the subsequent third ineffective period (NEP3), the generated second image can be transmitted to the data processing device (112). In this way, the second camera (115b) can receive light reflected from the welding target, generate a second image, and transmit it to the data processing device (112).

[0097] The generation section of the second image may overlap with the transmission section to the data processing device (112) of the first image and the turn-off section of the first camera (115a). For example, the first effective section (EP1) of the second trigger signal (TS2) may overlap with the first ineffective section (NEP1) and the first turn-off section (DP1) of the first trigger signal (TS1).

[0098] Likewise, the generation period of the first image may overlap with the transmission period to the data processing device (112) of the second image and the turn-off period of the second camera (115b). For example, the second effective period (EP2) of the first trigger signal (TS1) may overlap with the first ineffective period (NEP1) and the first turn-off period (DP1) of the second trigger signal (TS2).

[0099] The second trigger signal (TS2) may be in the form of the first trigger signal (TS1) delayed by the length of the generation interval of the first image. More specifically, the second trigger signal (TS2) may be in the form of the first trigger signal (TS1) delayed by A, which is the length of the first effective interval (EP1) of the first trigger signal (TS1).

[0100] In the first embodiment, the lengths of the generation interval of the first image and the transmission interval of the first image may be the same. For example, the lengths of the first effective interval (EP1) and the first ineffective interval (NEP1) may each be the same. For example, the lengths of the second effective interval (EP2) and the second ineffective interval (NEP2) may each be the same. However, the embodiments of the present disclosure are not necessarily limited thereto.

[0101] Comparing FIG. 5a and FIG. 5b, the welding device (100) includes two cameras, so the number of images generated in the same amount of time can be doubled compared to when a single camera is used. More specifically, when the welding device uses a single camera, three images are generated, but the welding device (100) can generate six images, and the frame rate can be improved. If the camera included in the welding device (100) supports high resolution, precise welding position verification is possible, and the frame rate can be increased by cross-photographing the welding target using multiple cameras.

[0103] FIG. 6 is a cross-sectional view along line I-I' of the welding device of FIG. 1 according to a second embodiment.

[0104] Referring to FIG. 6, the welding device (100) may include a frame (110), a lens unit (120), and a lighting unit (130). Details regarding the lens unit (120) and the lighting unit (130) that overlap with the description with reference to FIG. 1 are omitted below.

[0105] The frame (110) forms an internal space, and a central control unit (111), a data processing unit (112), a data conversion unit (113), a laser unit (114), a camera unit (115), a scanner (116), a mirror unit (117), and a beam splitter (118) may be arranged in the internal space of the frame (110).

[0106] The camera unit (115) may include a plurality of cameras. For example, the camera unit (115) may include a first camera (115a) to a fourth camera (115d).

[0107] The mirror section (117) may include a plurality of mirrors. For example, the mirror section (117) may include a first mirror (117a) and a second mirror (117b).

[0108] The beam splitter (118) may be provided in multiple numbers, and the welding device (100) may include first to third beam splitters (118a to 118c).

[0109] The second embodiment is characterized by the addition of a third mirror (117c), a fourth mirror (117d), a first beam splitter (118a), and a second beam splitter (118b) compared to the first embodiment described in FIG. 2. The third beam splitter (118c) of FIG. 6 may correspond to the beam splitter (118) of FIG. 2. Parts that overlap with the description with reference to FIG. 2 are omitted below.

[0110] The camera unit (115) can generate images by recognizing light reflected from the welding target. Here, the images can be used as data showing the state of the welding target. The first camera (115a) can generate a fifth image by receiving light reflected from the welding target. The second camera (115b) can generate a sixth image by receiving light reflected from the welding target. The third camera (115c) can generate a third image by receiving light reflected from the welding target. The fourth camera (115d) can generate a fourth image by receiving light reflected from the welding target. The images generated by the camera unit (115) are transmitted to the data processing unit (112) via the data conversion device (113) and can be used to evaluate the welding state in real time.

[0111] The interval during which the first camera (115a) generates the fifth image, the interval during which the second camera (115b) generates the sixth image, the interval during which the third camera (115c) generates the third image, and the interval during which the fourth camera (115d) generates the fourth image can be separated in time. More specifically, the interval during which the first camera (115a) generates the fifth image, the interval during which the second camera (115b) generates the sixth image, the interval during which the third camera (115c) generates the third image, and the interval during which the fourth camera (115d) generates the fourth image can be repeated sequentially without overlapping with one another.

[0112] A welding device (100) according to the second embodiment of the present disclosure can improve the frame rate by four times compared to the case where images are generated with a single camera by utilizing the first to fourth cameras (115a to 115d) to sequentially generate images without overlapping each other. For example, if the frame rate of each of the first camera (115a) to the fourth camera (115d) of the welding device (100) is 30Hz, the camera unit (115) can generate images at a frame rate of 120Hz. The effects of such a welding device (100) will be described in detail later with reference to FIG. 9.

[0113] The first mirror (117a) can reflect the laser beam irradiated from the laser unit (114) and transmit it to the scanner (116). On the other hand, the first mirror (117a) can transmit light that is reflected from the welding target and transmitted through the lens unit (120) and the scanner (116) as is.

[0114] The first beam splitter (118a) can separate the light transmitted from the first mirror (117a) and transmit it to the second beam splitter (118b) and the second mirror (117b), respectively. The light separated by the first beam splitter (118a) may have the same properties. For example, the phase of the light transmitted from the first beam splitter (118a) to the second beam splitter (118b) and the second mirror (117b) may be the same.

[0115] In FIG. 6, the paths of light separated from the first beam splitter (118a) are shown intersecting each other, but the embodiments of the present disclosure are not necessarily limited thereto.

[0116] The second beam splitter (118b) can separate the light transmitted from the first beam splitter (118a) and transmit it to the third camera (115c) and the fourth camera (115d), respectively. The light separated by the second beam splitter (118b) may have the same properties. For example, the phase of the light transmitted from the second beam splitter (118b) to the third camera (115c) and the phase of the light transmitted from the second beam splitter (118b) to the fourth camera (115d) may be the same.

[0117] In FIG. 6, the paths of light separated from the beam splitter (118) are shown intersecting each other, but the embodiments of the present disclosure are not necessarily limited thereto.

[0118] In the welding process using the welding device (100), the first to fourth cameras (115a to 115d) each receive light of the same nature. However, the interval in which the first camera (115a) generates the fifth image, the interval in which the second camera (115b) generates the sixth image, the interval in which the third camera (115c) generates the third image, and the interval in which the fourth camera (115d) generates the fourth image can be repeated sequentially without overlapping with one another. As a result, the first to fourth images show the appearance of the welding target at different time points, and the appearance of the welding target can be continuously verified.

[0119] A first camera (115a), a second camera (115b), a third beam splitter (118c), and a second mirror (117b) can form a first group (GR1). A third camera (115c), a fourth camera (115d), a first beam splitter (118a), and a second beam splitter (118b) can form a second group (GR2). According to an embodiment, if the welding device (100) additionally includes a beam splitter and a camera, the frame rate of the camera unit (115) can be further improved. For example, by additionally placing a configuration identical to that of the second group (GR2) between the first group (GR1) and the second group (GR2), the frame rate can be increased and the welding status can be determined more precisely.

[0121] FIG. 7 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of FIG. 6. The second embodiment is characterized by the addition of a third mirror (117c), a fourth mirror (117d), a first beam splitter (118a), and a second beam splitter (118b) compared to the first embodiment described in FIG. 3. The third beam splitter (118c) of FIG. 7 may correspond to the beam splitter (118) of FIG. 3. Parts that overlap with the description with reference to FIG. 3 are omitted below.

[0122] Referring to FIGS. 6 and FIGS. 7, the data processing device (112) can generate and supply a data conversion device control signal (FCS) and third to sixth trigger signals (TS3~TS6) to the data conversion device (113) under the control of the central control unit (111).

[0123] The third trigger signal (TS3) can be supplied to the third camera (115c) via the data conversion device (113) as a signal to control the operation of the third camera (115c).

[0124] The fourth trigger signal (TS4) can be supplied to the fourth camera (115d) via the data conversion device (113) as a signal to control the operation of the fourth camera (115d).

[0125] The fifth trigger signal (TS5) can be supplied to the first camera (115a) via the data conversion device (113) as a signal to control the operation of the first camera (115a).

[0126] The sixth trigger signal (TS6) can be supplied to the second camera (115b) via the data conversion device (113) as a signal to control the operation of the second camera (115b).

[0127] The operation of the first to fourth cameras (115a to 115d) according to the third to sixth trigger signals (TS3 to TS6) will be described later with reference to FIG. 9.

[0128] The fifth image (I5) generated by the first camera (115a), the sixth image (I6) generated by the second camera (115b), the third image (I3) generated by the third camera (115c), and the fourth image (I4) generated by the fourth camera (115d) can each be transmitted to a data conversion device (113). The data conversion device (113) can generate a fifth information signal (IS5) by converting the fifth image (I5) to the format of the data processing device (112) so that the data processing device (112) can utilize it to determine the welding status of the welding target. The data conversion device (113) can generate a sixth information signal (IS6) by converting the sixth image (I6) to the format of the data processing device (112). The data conversion device (113) can generate a third information signal (IS3) by converting the third image (I3) to the format of the data processing device (112). The data conversion device (113) can generate a fourth information signal (IS4) by converting the fourth image (I4) to the format of the data processing device (112). The generated third to sixth information signals (IS3~IS6) are transmitted to the data processing device (112), and the data processing device (112) can determine the welding status based on the transmitted third to sixth information signals (IS3~IS6).

[0130] FIG. 8 is a diagram illustrating the path of a laser and light of a second wavelength traveling within the welding device of FIG. 6. The second embodiment is characterized by the addition of a third mirror (117c), a fourth mirror (117d), a first beam splitter (118a), and a second beam splitter (118b) compared to the first embodiment described in FIG. 4. The third beam splitter (118c) of FIG. 8 may correspond to the beam splitter (118) of FIG. 4. Parts that overlap with the description with reference to FIG. 4 are omitted below.

[0131] Referring to FIGS. 6 and FIGS. 8, a laser of a first wavelength emitted from the laser unit (114) can be reflected by the first mirror (117a) and transmitted to the scanner (116). Subsequently, the laser can be reflected again from the scanner (116) and passed through the lens unit (120) to be accurately irradiated onto a desired area of ​​the welding target (10).

[0132] Light (L1) of a second wavelength emitted from the illumination unit (130) can be reflected from the welding target (10) and transmitted to the scanner (116) via the lens unit (120). Here, the second wavelength may be included in a range of 400 nm or more and 700 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto.

[0133] Afterwards, the light of the second wavelength (L1) can be reflected again from the scanner (116), pass through the first mirror (117a), and be transmitted to the first beam splitter (118a).

[0134] Some of the light of the second wavelength (L1) separated from the first beam splitter (118a) is transmitted to the second beam splitter (118b), and then separated again from the second beam splitter (118b) and transmitted to the third camera (115c) and the fourth camera (115d).

[0135] The remaining portion of the second wavelength light (L1) separated from the first beam splitter (118a) is reflected from the second mirror (117b) and transmitted to the third beam splitter (118c), and then separated again from the third beam splitter (118c) and transmitted to the first camera (115a) and the second camera (115b).

[0137] FIG. 9 is a timing diagram for explaining the effect of the welding device of FIG. 6. FIG. 9 is a timing diagram showing the third to sixth trigger signals (TS3 to TS6) supplied to the first to fourth cameras (115a to 115d) in the welding device (100) according to the second embodiment.

[0138] Referring to FIGS. 6 and FIGS. 9, the third trigger signal (TS3) is supplied to the third camera (115c) to act as a control signal, and the fourth trigger signal (TS4) is supplied to the fourth camera (115d) to act as a control signal. The fifth trigger signal (TS5) is supplied to the first camera (115a) to act as a control signal, and the sixth trigger signal (TS6) is supplied to the second camera (115b) to act as a control signal.

[0139] Each of the third to sixth trigger signals (TS3 to TS6) may be in the form of a pulse. As illustrated in FIG. 9, each of the third to sixth trigger signals (TS3 to TS6) may be in the form of a square pulse, but the embodiments of the present disclosure are not necessarily limited thereto.

[0140] When the third trigger signal (TS3) is at a high level, the third camera (115c) generates a third image and transmits the generated third image to the data processing device (112), and when the third trigger signal (TS3) is at a low level, the third camera (115c) can be turned off (or its operation can be stopped).

[0141] When the fourth trigger signal (TS4) is at a high level, the fourth camera (115d) generates a fourth image and transmits the generated fourth image to a data processing device (112), and when the fourth trigger signal (TS4) is at a low level, the fourth camera (115d) can be turned off (or its operation can be stopped).

[0142] When the fifth trigger signal (TS5) is at a high level, the first camera (115a) generates a fifth image and transmits the generated fifth image to a data processing device (112), and when the fifth trigger signal (TS5) is at a low level, the first camera (115a) can be turned off (or its operation can be stopped).

[0143] When the sixth trigger signal (TS6) is at a high level, the second camera (115b) generates a sixth image and transmits the generated sixth image to a data processing device (112), and when the sixth trigger signal (TS6) is at a low level, the second camera (115b) can be turned off (or its operation can be stopped).

[0144] In the third trigger signal (TS3), the first effective interval (EP1) may correspond to the interval during which the third camera (115c) generates the third image. In the third trigger signal (TS3), the first ineffective interval (NEP1) may correspond to the interval during which the third camera (115c) transmits the generated third image to the data processing device (112). In the third trigger signal (TS3), the first turn-off interval (DP1) may correspond to the interval during which the third camera (115c) is turned off and stops operating.

[0145] In the fourth trigger signal (TS4), the first effective interval (EP1) may correspond to the interval during which the fourth camera (115d) generates the fourth image. In the fourth trigger signal (TS4), the first ineffective interval (NEP1) may correspond to the interval during which the fourth camera (115d) transmits the generated fourth image to the data processing device (112). In the fourth trigger signal (TS4), the first turn-off interval (DP1) may correspond to the interval during which the fourth camera (115d) is turned off and stops operating.

[0146] In the fifth trigger signal (TS5), the first effective interval (EP1) may correspond to the interval during which the first camera (115a) generates the fifth image. In the fifth trigger signal (TS5), the first ineffective interval (NEP1) may correspond to the interval during which the first camera (115a) transmits the generated fifth image to the data processing device (112). In the fifth trigger signal (TS5), the first turn-off interval (DP1) may correspond to the interval during which the first camera (115a) is turned off and stops operating.

[0147] In the sixth trigger signal (TS6), the first effective interval (EP1) may correspond to the interval during which the second camera (115b) generates the sixth image. In the sixth trigger signal (TS6), the first ineffective interval (NEP1) may correspond to the interval during which the second camera (115b) transmits the generated sixth image to the data processing device (112). In the sixth trigger signal (TS6), the first turn-off interval (DP1) may correspond to the interval during which the second camera (115b) is turned off and stops operating.

[0148] The intervals in which each of the third to sixth images is generated can be repeated sequentially without overlapping each other. For example, the first effective interval (EP1) of the third trigger signal (TS3), the first effective interval (EP1) of the fourth trigger signal (TS4), the first effective interval (EP1) of the fifth trigger signal (TS5), and the first effective interval (EP1) of the sixth trigger signal (TS6) can be repeated sequentially without overlapping each other.

[0149] The fourth trigger signal (TS4) may be a form in which the third trigger signal (TS3) is delayed by the length of the generation interval of the third image. More specifically, the fourth trigger signal (TS4) may be a form in which the third trigger signal (TS3) is delayed by A, which is the length of the first effective interval (EP1) of the third trigger signal (TS3).

[0150] The fifth trigger signal (TS5) may be in the form of the fourth trigger signal (TS4) delayed by the length of the generation interval of the fourth image. More specifically, the fifth trigger signal (TS5) may be in the form of the fourth trigger signal (TS4) delayed by A, which is the length of the first effective interval (EP1) of the fourth trigger signal (TS4).

[0151] The sixth trigger signal (TS6) may be a form in which the fifth trigger signal (TS5) is delayed by the length of the generation interval of the first image. More specifically, the sixth trigger signal (TS6) may be a form in which the fifth trigger signal (TS5) is delayed by A, which is the length of the first effective interval (EP1) of the fifth trigger signal (TS5).

[0152] The first effective period (EP1) of the sixth trigger signal (TS6) may overlap with the first ineffective period (NEP1) and the first turn-off period (DP1) of the third trigger signal (TS3).

[0153] Compared to the case where the welding device uses a single camera, the number of generated images can be increased fourfold by including four cameras in the welding device (100). If the camera included in the welding device (100) supports high resolution, precise welding position verification is possible, and the frame rate can be increased by cross-photographing the welding target using multiple cameras.

[0155] FIG. 10 is a perspective view showing a welding device according to the third and fourth embodiments.

[0156] Referring to FIG. 10, a welding device (200) according to the third and fourth embodiments may include a frame (210), a lens part (220), a first lighting part (230), and a second lighting part (240).

[0157] The frame (210) may have a three-dimensional shape extending in a first direction (DR1), a second direction (DR2) intersecting the first direction (DR1), and a third direction (DR3) intersecting the first direction (DR1) and the second direction (DR2). For example, as shown in FIG. 10, the frame (210) may be in the shape of a rectangular prism, but the embodiments of the present disclosure are not necessarily limited thereto.

[0158] A lens portion (220) may be attached to one side of the frame (210) (e.g., the lower side of the frame (210)). The lens portion (220) may serve to focus the laser emitted from inside the frame (210) to the outside so that it can be accurately irradiated onto the intended area of ​​the welding target. Additionally, the lens portion (220) may also serve to provide a path through which light reflected from the welding target and incident into the frame (210) can pass.

[0159] A first lighting unit (230) and a second lighting unit (240) that irradiate light toward a welding target may be disposed on one side (e.g., the lower side of the frame (210)) of the frame (210) to which the lens unit (220) is attached.

[0160] Light irradiated from the first lighting unit (230) and the second lighting unit (240) can be reflected from the welding target and enter the inside of the frame (210) through the lens unit (220).

[0161] In the embodiments of the present disclosure, the light irradiated from each of the first illumination unit (230) and the second illumination unit (240) may be visible light, but this is merely an example, and the light irradiated from the first illumination unit (230) and the second illumination unit (240) may be ultraviolet or infrared light.

[0162] According to the embodiments, the first illumination unit (230) and the second illumination unit (240) can irradiate light of the same wavelength.

[0163] According to embodiments, the first illumination unit (230) and the second illumination unit (240) may irradiate light of different wavelengths onto the welding target. For example, the first illumination unit (230) may irradiate light of a wavelength in the range of 400 nm to 700 nm to the welding target, while the second illumination unit (240) may irradiate light of a wavelength in the range of 10 nm to 400 nm to the welding target. In other words, in the third embodiment, the first illumination unit (230) may irradiate light in the form of visible light onto the welding target, while the second illumination unit (240) may irradiate light in the form of ultraviolet light onto the welding target. However, the embodiments of the present disclosure are not necessarily limited thereto, and the first illumination unit (230) may irradiate light in the form of ultraviolet light onto the welding target, while the second illumination unit (240) may irradiate light in the form of visible light onto the welding target.

[0164] A welding device (200) according to embodiments of the present disclosure can confirm an accurate welding position through a camera and, based on this information, irradiate a laser at an appropriate welding position to proceed with welding. The position and intensity of the laser can be adjusted according to the progress of the welding.

[0165] According to the third embodiment of the present disclosure, the welding device (200) utilizes lighting of different wavelength ranges and cameras that recognize them to generate an image containing the appearance of a welding target observed with light of various wavelengths, and can precisely evaluate the welding condition based on this.

[0166] According to the fourth embodiment of the present disclosure, by utilizing a plurality of cameras to set different shooting areas for the welding target and shooting simultaneously, a wider field of view can be secured for the welding target.

[0168] FIG. 11 is a cross-sectional view along the line II-II' of the welding device of FIG. 10.

[0169] Referring to FIGS. 10 and 11, the welding device (200) may include a frame (210), a lens unit (220), a first lighting unit (230), and a second lighting unit (240). Details regarding the lens unit (220), the first lighting unit (230), and the second lighting unit (240) that overlap with the description with reference to FIG. 10 are omitted below.

[0170] The frame (210) forms an internal space, and a central control unit (211), a data processing unit (212), a data conversion unit (213), a laser unit (214), a camera unit (215), a scanner (216), and a mirror unit (217) may be arranged in the internal space of the frame (210).

[0171] The camera unit (215) may include a plurality of cameras. For example, the camera unit (215) may include a first camera (215a) and a second camera (215b).

[0172] The mirror section (217) may include a plurality of mirrors. For example, the mirror section (217) may include a first mirror (217a), a second mirror (217b), and a third mirror (217c).

[0173] The central control unit (211) can perform the role of controlling the data processing device (212), the laser unit (214), the scanner (216), the first lighting unit (230), and the second lighting unit (240). For example, the central control unit (211) can control the angle of the scanner (216), etc., to control the direction of propagation of the laser or light within the frame (210). For example, the central control unit (211) can control the intensity, wavelength, and phase of the laser emitted from the laser unit (214). For example, the central control unit (211) can control the on / off status of the first lighting unit (230) so that the first lighting unit (230) emits light or does not emit light. For example, the central control unit (211) can control the on / off status of the second lighting unit (240) so that the second lighting unit (240) emits light or does not emit light. Furthermore, the central control unit (211) can control the data processing unit (212) to transmit control signals (e.g., trigger signals) to the camera unit (215).

[0174] The data processing unit (212) can supply control signals (e.g., trigger signals) to the camera unit (215) under the control of the central control unit (211). The data processing unit (212) can determine the welding status based on the information signals transmitted through the camera unit (215) and the data conversion unit (213).

[0175] The data conversion device (213) can transmit control signals (e.g., trigger signals) supplied from the data processing device (212) to the camera unit (215). The data conversion device (213) can perform the function of processing images transmitted from the camera unit (215). For example, the data conversion device (213) can capture still images from the images. For example, if the images are generated from an analog camera, the data conversion device (213) can convert them into digital signals so that they can be processed by a computer. For example, after processing the images transmitted from the camera unit (215), the data conversion device (213) can transmit them to another device (e.g., the data processing device (212)).

[0176] The laser unit (214) can irradiate lasers of various wavelengths, intensities, and phases according to the control of the central control unit (211). For example, if it is necessary to increase the welding speed by evaluating the welding status of the welding target in real time, the intensity of the laser emitted from the laser unit (214) is increased. The laser irradiated from the laser unit (214) can be reflected by the first mirror (217a) and travel in a specific direction.

[0177] The camera unit (215) can receive light reflected from the welding target and generate images. Here, the images can be used as data showing the condition of the welding target. The first camera (215a) can generate a seventh image by receiving light reflected from the welding target that is irradiated from the first lighting unit (230). The second camera (215b) can generate an eighth image by receiving light reflected from the welding target that is irradiated from the second lighting unit (240). The images generated by the camera unit (215) are transmitted to the data processing unit (212) via the data conversion device (213) and can be used to evaluate the welding condition in real time. For example, if the light irradiated from the first lighting unit (230) is ultraviolet light and the light irradiated from the second lighting unit (240) is visible light, the seventh image may be advantageous for obtaining information sensitive to the detailed condition of the welding location or temperature changes, whereas the eighth image may be advantageous for obtaining information about the external condition of the welding location or surface texture.

[0178] In the third embodiment, the interval during which the first camera (215a) generates the seventh image and the interval during which the second camera (215b) generates the eighth image may be separated in time. More specifically, the interval during which the first camera (215a) generates the seventh image and the interval during which the second camera (215b) generates the eighth image may intersect. While the first camera (215a) generates the seventh image, the second camera (215b) may not generate the eighth image, and while the second camera (215b) generates the eighth image, the first camera (215a) may not generate the seventh image.

[0179] In the third embodiment, the interval during which the first camera (215a) generates the seventh image may overlap with the interval during which the second camera (215b) transmits the generated eighth image to the data processing device (212) and the interval during which the second camera (215b) is turned off.

[0180] Likewise, in the third embodiment, the interval during which the second camera (215b) generates the eighth image may overlap with the interval during which the first camera (215a) transmits the generated seventh image to the data processing device (112) and the interval during which the first camera (215a) is turned off.

[0181] A welding device (200) according to the third embodiment of the present disclosure can double the frame rate compared to generating images with a single camera by cross-generating images using a first camera (215a) and a second camera (215b). For example, if the frame rate of each of the first camera (215a) and the second camera (215b) of the welding device (200) is 30Hz, the camera unit (215) can generate images at a frame rate of 60Hz. The effects of such a welding device (100) will be described in detail later with reference to FIG. 14.

[0182] Additionally, the welding device (200) according to the third embodiment of the present disclosure includes first and second illumination units (230, 240) that irradiate light of different wavelengths and first and second cameras (215a, 215b) that receive light of different wavelengths and generate an image. An image of a welding target observed with light of various wavelengths is generated, and based on this, the welding condition can be precisely evaluated from various perspectives.

[0183] The scanner (216) can be controlled by the central control unit (211) to adjust the direction of travel of the laser transmitted from the first mirror (217a) so that it is accurately irradiated to a desired area of ​​the welding target. Additionally, the scanner (216) can adjust the direction of travel of the light reflected from the welding target so that it is accurately transmitted to the camera unit (215) via the first mirror (217a).

[0184] In the embodiments, the scanner (216) can adjust the direction of travel by reflecting the light reflected from the laser and the welding object in a desired direction. However, the embodiments of the present disclosure are not necessarily limited thereto. The scanner (216) can adjust the direction of travel of the light reflected from the laser and the welding object in various ways.

[0185] The mirrors included in the mirror section (217) may be dichroic mirrors that reflect light of a specific wavelength and transmit light of another wavelength through a special coating. The first mirror (217a) can reflect the laser irradiated from the laser section (214) and transmit it to the scanner (216). On the other hand, the first mirror (217a) can transmit light that is reflected from the welding object and transmitted through the lens section (220) and the scanner (216) as is. Among the light that passes through the first mirror (217a), the light irradiated from the first illumination section (230) can be reflected by the second mirror (217b) and transmitted to the first camera (215a). On the other hand, among the light that passes through the first mirror (217a), the light irradiated from the second lighting unit (240) passes through the second mirror (217b) and is transmitted to the third mirror (217c), and then is reflected from the third mirror (217c) and transmitted to the second camera (215b).

[0187] FIG. 12 is a diagram illustrating the flow of signals transmitted and received between the components of the welding device of FIG. 10.

[0188] Referring to FIGS. 10 and 12, a welding device (200) may include a laser unit (214) that irradiates a laser of a first wavelength, a first illumination unit (230) that irradiates light of a second wavelength different from the first wavelength to a laser irradiation area of ​​a welding target, a second illumination unit (240) that irradiates light of a third wavelength different from the first wavelength and the second wavelength to a laser irradiation area of ​​a welding target, a first camera (215a) that receives light of the second wavelength reflected from the welding target and generates a seventh image, and a second camera (215b) that receives light of the third wavelength reflected from the welding target and generates an eighth image.

[0189] Additionally, the welding device (200) may include a data processing device (212) that controls the first camera (215a) and the second camera (215b) by supplying a seventh trigger signal (TS7) to the first camera (215a) and an eighth trigger signal (TS8) to the second camera (215b).

[0190] Additionally, the welding device (200) may include a laser, a scanner (216) that adjusts the direction of propagation of light of a second wavelength reflected from a welding target and light of a third wavelength reflected from a welding target, a first mirror (217a) that receives the laser from the laser unit (214) and transmits it to the scanner (216), and receives and transmits the light of a second wavelength and light of a third wavelength reflected from the welding target from the scanner (216), a second mirror (217b) that transmits the light of a second wavelength received from the first mirror (217a) to a first camera (215a) and transmits the light of a third wavelength received from the first mirror (217a), and a third mirror (217c) that transmits the light of a third wavelength received from the second mirror (217b) to a second camera (215b).

[0191] The central control unit (211) can perform the role of managing and controlling the operation of the data processing unit (212), the laser unit (214), the scanner (216), the first lighting unit (230), and the second lighting unit (240). For example, the central control unit (211) can transmit a data control signal (DCS) to the data processing unit (212) to control the data processing unit (212) to transmit control signals (e.g., the seventh trigger signal (TS7), the eighth trigger signal (TS8), and the data conversion unit control signal (FCS)) to the data conversion unit (213). For example, the central control unit (211) can transmit a scanner control signal (SCS) to the scanner (216) to control the angle of the scanner (216), etc. For example, the central control unit (211) can transmit a first lighting unit control signal (LCS1) to the first lighting unit (230) to control the on / off status of the first lighting unit (230) and control whether the first lighting unit (230) emits light of a second wavelength or not. For example, the central control unit (211) can transmit a second lighting unit control signal (LCS2) to the second lighting unit (240) to control the on / off status of the second lighting unit (240) and control whether the second lighting unit (240) emits light of a third wavelength or not. For example, the central control unit (211) can control the laser unit (214) to control the intensity, wavelength, and phase of the laser emitted from the laser unit (214).

[0192] The data processing unit (212) can generate and supply a data conversion unit control signal (FCS), a seventh trigger signal (TS7), and an eighth trigger signal (TS8) to the data conversion unit (213) under the control of the central control unit (211). The seventh trigger signal (TS7) can be supplied to the first camera (215a) via the data conversion unit (213) as a signal to control the operation of the first camera (215a). The eighth trigger signal (TS8) can be supplied to the second camera (215b) via the data conversion unit (213) as a signal to control the operation of the second camera (215b). The operation of the first camera (215a) and the second camera (215b) according to the seventh trigger signal (TS7) and the eighth trigger signal (TS8) will be described later with reference to FIGS. 14 and FIGS. 16.

[0193] The seventh image (I7) generated by the first camera (215a) and the eighth image (I8) generated by the second camera (215b) can each be transmitted to a data conversion device (213). The data conversion device (213) can generate a seventh information signal (IS7) by converting the seventh image (I7) to the format of the data processing device (212) so that the data processing device (212) can use it to determine the welding status (e.g., degree of welding progress, etc.). The data conversion device (213) can generate an eighth information signal (IS8) by converting the eighth image (I8) to the format of the data processing device (212). The generated seventh and eighth information signals (IS7, IS8) are transmitted to the data processing device (212), and the data processing device (212) can determine the welding status based on the transmitted seventh and eighth information signals (IS7, IS8).

[0195] FIG. 13 is a diagram illustrating the paths of a laser, light of a second wavelength, and light of a third wavelength within the welding device of FIG. 10 according to a third embodiment.

[0196] Referring to FIGS. 11 and 13, a laser of a first wavelength emitted from the laser unit (214) can be reflected by the first mirror (217a) and transmitted to the scanner (216). The laser can then be reflected again from the scanner (216) and passed through the lens unit (220) to be accurately irradiated onto a desired area of ​​the welding target (10).

[0197] Light (L1) of a second wavelength emitted from the first illumination unit (230) can be reflected from the welding target (10) and transmitted to the scanner (216) via the lens unit (220). Here, the second wavelength may be included in a range of 400 nm or more and 700 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto. Here, the second wavelength may be different from the first wavelength.

[0198] Subsequently, the light of the second wavelength (L1) can be reflected again from the scanner (216), pass through the first mirror (217a), and be transmitted to the second mirror (217b). After that, the light of the second wavelength (L1) can be reflected from the second mirror (217b) and transmitted to the first camera (215a).

[0199] Light of a third wavelength (L2) emitted from the second illumination unit (240) can be reflected from the welding target (10) and transmitted to the scanner (216) via the lens unit (220). Here, the third wavelength may be included in a range of 10 nm or more and 400 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto. Here, the third wavelength may be different from the first wavelength and the second wavelength.

[0200] Afterwards, the light of the third wavelength (L2) is reflected again from the scanner (216), passes through the first mirror (217a) and the second mirror (217b), is reflected from the third mirror (217c), and can be transmitted to the second camera (215b).

[0202] FIG. 14 is a timing diagram for explaining the effect of the welding device of FIG. 10 according to the third embodiment.

[0203] Referring to FIG. 14, the seventh trigger signal (TS7) is supplied to the first camera (215a) to act as a control signal, and the eighth trigger signal (TS8) is supplied to the second camera (215b) to act as a control signal.

[0204] Each of the seventh trigger signal (TS7) and the eighth trigger signal (TS8) may be in the form of a pulse. As illustrated in FIG. 14, each of the seventh trigger signal (TS7) and the eighth trigger signal (TS8) may be in the form of a square pulse, but the embodiments of the present disclosure are not necessarily limited thereto.

[0205] When the 7th trigger signal (TS7) is at a high level, the 1st camera (215a) generates a 7th image and transmits the generated 7th image to a data processing device (212), and when the 7th trigger signal (TS7) is at a low level, the 1st camera (215b) can be turned off.

[0206] When the 8th trigger signal (TS8) is at a high level, the 2nd camera (215b) generates an 8th image and transmits the generated 8th image to a data processing device (212), and when the 8th trigger signal (TS8) is at a low level, the 2nd camera (215b) can be turned off.

[0207] In the seventh trigger signal (TS7), the first to third effective intervals (EP1~EP3) may correspond to intervals where the first camera (215a) generates the seventh images. Also, in the seventh trigger signal (TS7), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the first camera (215a) transmits the generated seventh images to the data processing device (212). Also, in the seventh trigger signal (TS7), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the first camera (215a) is turned off and stops operating.

[0208] In the first effective period (EP1) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent first ineffective period (NEP1), the generated seventh image can be transmitted to the data processing device (212). In the subsequent first turn-off period (DP1), the first camera (215a) can be turned off.

[0209] In the second effective period (EP2) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent second ineffective period (NEP2), the generated seventh image can be transmitted to the data processing device (212). In the subsequent second turn-off period (DP2), the first camera (215a) can be turned off.

[0210] In the third effective period (EP3) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent third ineffective period (NEP3), the generated seventh image can be transmitted to the data processing device (212). In this way, the first camera (215a) can generate a seventh image by receiving light reflected from the welding target and transmit it to the data processing device (212).

[0211] In the eighth trigger signal (TS8), the first to third effective intervals (EP1~EP3) may correspond to intervals where the second camera (215b) generates the eighth images. Also, in the eighth trigger signal (TS8), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the second camera (215b) transmits the generated eighth images to the data processing device (212). Also, in the eighth trigger signal (TS8), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the second camera (215b) is turned off and stops operating.

[0212] In the first effective period (EP1) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent first ineffective period (NEP1), the generated eighth image can be transmitted to the data processing device (212). In the subsequent first turn-off period (DP1), the second camera (215b) can be turned off.

[0213] In the second effective period (EP2) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent second ineffective period (NEP2), the generated eighth image can be transmitted to the data processing device (212). In the subsequent second turn-off period (DP2), the second camera (215b) can be turned off.

[0214] In the third effective period (EP3) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent third ineffective period (NEP3), the generated eighth image can be transmitted to the data processing device (212). In this way, the second camera (215b) can generate an eighth image by receiving light reflected from the welding target and transmit it to the data processing device (212).

[0215] The generation section of the 8th image may overlap with the transmission section to the data processing device (212) of the 7th image and the turn-off section of the 1st camera (215a). For example, the first effective section (EP1) of the 8th trigger signal (TS8) may overlap with the first ineffective section (NEP1) and the first turn-off section (DP1) of the 7th trigger signal (TS7).

[0216] Likewise, the generation period of the 7th image may overlap with the transmission period to the data processing device (212) of the 8th image and the turn-off period of the 2nd camera (215b). For example, the 2nd effective period (EP2) of the 7th trigger signal (TS7) may overlap with the 1st ineffective period (NEP1) and the 1st turn-off period (DP1) of the 8th trigger signal (TS8).

[0217] The eighth trigger signal (TS8) may be a form in which the seventh trigger signal (TS7) is delayed by the length of the generation interval of the first image. More specifically, the eighth trigger signal (TS8) may be a form in which the seventh trigger signal (TS7) is delayed by the length of the first effective interval (EP1) of the seventh trigger signal (TS7). As a result, the generation interval of the seventh image and the generation interval of the eighth image may intersect.

[0218] In the third embodiment, the lengths of the generation interval of the first image and the transmission interval of the first image may be the same. For example, the lengths of the first effective interval (EP1) and the first ineffective interval (NEP1) may each be the same. For example, the lengths of the second effective interval (EP2) and the second ineffective interval (NEP2) may each be the same. However, the embodiments of the present disclosure are not necessarily limited thereto.

[0219] Referring to FIG. 14, the welding device (200) includes two cameras, so that the number of images generated in the same amount of time can be doubled compared to when a single camera is used. If the camera included in the welding device (100) supports high resolution, precise welding position verification is possible, and the frame rate can be increased by cross-photographing the welding target using multiple cameras.

[0220] Images generated by the camera unit (215) are transmitted to the data processing unit (212) via the data conversion device (213) and can be used to evaluate the welding status in real time. For example, if the light emitted from the first lighting unit (230) is ultraviolet light and the light emitted from the second lighting unit (240) is visible light, the first image may be advantageous for obtaining information sensitive to the detailed state of the welding location or temperature changes, whereas the second image may be advantageous for obtaining information about the external state of the welding location or surface texture.

[0221] A welding device (200) according to the third embodiment of the present disclosure includes first and second illumination units (230, 240) that irradiate light of different wavelengths and first and second cameras (215a, 215b) that receive light of different wavelengths and generate an image. An image of a welding target observed with light of various wavelengths is generated, and based on this, the welding condition can be precisely evaluated from various perspectives.

[0223] FIG. 15 is a diagram illustrating the paths of a laser, light of a second wavelength, and light of a third wavelength within the welding device of FIG. 10 according to a fourth embodiment.

[0224] Referring to FIG. 15, the welding device (200) may include a laser unit (214) that irradiates a laser of a first wavelength, a first illumination unit (230) that irradiates light of a second wavelength different from the first wavelength to a first area of ​​a welding target, a second illumination unit (240) that irradiates light of a first wavelength and a third wavelength different from the second wavelength to a second area different from the first area of ​​a welding target, a first camera (215a) that receives light of a second wavelength reflected from the first area of ​​a welding target and generates a seventh image, and a second camera (215b) that receives light of a third wavelength reflected from the second area of ​​a welding target and generates an eighth image.

[0225] A welding device (200) may include a laser, a scanner (216) that adjusts the direction of propagation of light of a second wavelength reflected from a first region and light of a third wavelength reflected from a second region, a first mirror (217a) that receives the laser from a laser unit (214) and transmits it to the scanner (216), and receives and transmits light of a second wavelength reflected from a first region and light of a third wavelength reflected from a second region from the scanner (216), a second mirror (217b) that transmits light of a second wavelength received from the first mirror (217a) to a first camera (215a) and transmits light of a third wavelength received from the first mirror (217a), and a third mirror (217c) that transmits light of a third wavelength received from the second mirror (217b) to a second camera (215b).

[0226] A laser of a first wavelength emitted from the laser unit (214) can be reflected by the first mirror (217a) and transmitted to the scanner (216). Subsequently, the laser can be reflected again from the scanner (216), pass through the lens unit (220), and be accurately irradiated onto a desired area of ​​the welding target (10).

[0227] Light (L1) of a second wavelength emitted from the first illumination unit (230) can be reflected from the welding target (10) and transmitted to the scanner (216) via the lens unit (220). Here, the second wavelength may be included in a range of 400 nm or more and 700 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto. Here, the second wavelength may be different from the first wavelength.

[0228] Subsequently, the light of the second wavelength (L1) can be reflected again from the scanner (216), pass through the first mirror (217a), and be transmitted to the second mirror (217b). After that, the light of the second wavelength (L1) can be reflected from the second mirror (217b) and transmitted to the first camera (215a).

[0229] Light of a third wavelength (L2) emitted from the second illumination unit (240) can be reflected from the welding target (10) and transmitted to the scanner (216) via the lens unit (220). Here, the third wavelength may be included in a range of 400 nm or more and 700 nm or less, but the embodiments of the present disclosure are not necessarily limited thereto. Here, the third wavelength may be different from the first wavelength and the second wavelength.

[0230] Afterwards, the light of the third wavelength (L2) is reflected again from the scanner (216), passes through the first mirror (217a) and the second mirror (217b), is reflected from the third mirror (217c), and can be transmitted to the second camera (215b).

[0232] FIG. 16 is a timing diagram for explaining the effect of the welding device of FIG. 10 according to the fourth embodiment.

[0233] Referring to FIG. 16, the seventh trigger signal (TS7) is supplied to the first camera (215a) to act as a control signal, and the eighth trigger signal (TS8) is supplied to the second camera (215b) to act as a control signal.

[0234] Each of the seventh trigger signal (TS7) and the eighth trigger signal (TS8) may be in the form of a pulse. As illustrated in FIG. 16, each of the seventh trigger signal (TS7) and the eighth trigger signal (TS8) may be in the form of a square pulse, but embodiments of the present disclosure are not necessarily limited thereto. The seventh trigger signal (TS7) and the eighth trigger signal (TS8) may have the same phase.

[0235] When the 7th trigger signal (TS7) is at a high level, the 1st camera (215a) generates a 7th image and transmits the generated 7th image to a data processing device (212), and when the 7th trigger signal (TS7) is at a low level, the 1st camera (215b) can be turned off.

[0236] When the 8th trigger signal (TS8) is at a high level, the 2nd camera (215b) generates an 8th image and transmits the generated 8th image to a data processing device (212), and when the 8th trigger signal (TS8) is at a low level, the 2nd camera (215b) can be turned off.

[0237] In the seventh trigger signal (TS7), the first to third effective intervals (EP1~EP3) may correspond to intervals where the first camera (215a) generates the seventh images. Also, in the seventh trigger signal (TS7), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the first camera (215a) transmits the generated seventh images to the data processing device (212). Also, in the seventh trigger signal (TS7), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the first camera (215a) is turned off and stops operating.

[0238] In the first effective period (EP1) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent first ineffective period (NEP1), the generated seventh image can be transmitted to the data processing device (212). In the subsequent first turn-off period (DP1), the first camera (215a) can be turned off.

[0239] In the second effective period (EP2) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent second ineffective period (NEP2), the generated seventh image can be transmitted to the data processing device (212). In the subsequent second turn-off period (DP2), the first camera (215a) can be turned off.

[0240] In the third effective period (EP3) of the seventh trigger signal (TS7), the first camera (215a) can generate a seventh image by receiving light irradiated from the first lighting unit (230) and reflected from the welding target. In the subsequent third ineffective period (NEP3), the generated seventh image can be transmitted to the data processing device (212). In this way, the first camera (215a) can generate a seventh image by receiving light reflected from the welding target and transmit it to the data processing device (212).

[0241] In the eighth trigger signal (TS8), the first to third effective intervals (EP1~EP3) may correspond to intervals where the second camera (215b) generates the eighth images. Also, in the eighth trigger signal (TS8), the first to third ineffective intervals (NEP1~NEP3) may correspond to intervals where the second camera (215b) transmits the generated eighth images to the data processing device (212). Also, in the eighth trigger signal (TS8), the first and second turn-off intervals (DP1, DP2) may correspond to intervals where the second camera (215b) is turned off and stops operating.

[0242] In the first effective period (EP1) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent first ineffective period (NEP1), the generated eighth image can be transmitted to the data processing device (212). In the subsequent first turn-off period (DP1), the second camera (215b) can be turned off.

[0243] In the second effective period (EP2) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent second ineffective period (NEP2), the generated eighth image can be transmitted to the data processing device (212). In the subsequent second turn-off period (DP2), the second camera (215b) can be turned off.

[0244] In the third effective period (EP3) of the eighth trigger signal (TS8), the second camera (215b) can generate an eighth image by receiving light irradiated from the second lighting unit (240) and reflected from the welding target. In the subsequent third ineffective period (NEP3), the generated eighth image can be transmitted to the data processing device (212). In this way, the second camera (215b) can generate an eighth image by receiving light reflected from the welding target and transmit it to the data processing device (212).

[0245] The generation interval of the 8th image may overlap with the generation interval of the 7th image. For example, the first effective interval (EP1) of the 8th trigger signal (TS8) may overlap with the first effective interval (EP1) of the 7th trigger signal (TS7).

[0246] In the fourth embodiment, the lengths of the generation interval of the seventh image and the transmission interval of the eighth image may be the same. For example, the lengths of the first effective interval (EP1) and the first ineffective interval (NEP1) may each be the same. For example, the lengths of the second effective interval (EP2) and the second ineffective interval (NEP2) may each be the same. However, the embodiments of the present disclosure are not necessarily limited thereto.

[0247] A welding device (200) according to the fourth embodiment of the present disclosure may align the shooting area of ​​a welding target differently using a plurality of cameras (e.g., a first camera (215a), a second camera (215b)). For example, a first illumination unit (230) may irradiate light of a second wavelength onto a first area, and this light may be reflected from the first area of ​​the welding target and transmitted to the first camera (215a). Meanwhile, a second illumination unit (240) may irradiate light of a third wavelength onto a second area, and this light may be reflected from the second area of ​​the welding target and transmitted to the second camera (215b). By generating images simultaneously with the first camera (215a) and the second camera (215b), a wider field of view can be secured. For example, compared to using a single camera, the images generated by the first camera (215a) and the second camera (215b) include the first area and the second area, thereby providing a wider field of view. Explanation of the symbols

[0248] 100, 200: Welding device 110, 210: Frame 120, 220: Lens section 130: Lighting unit 230: 1st Illumination Unit 240: 2nd Illumination Unit 111, 211: Central Control Unit 112, 212: Data processing unit 113, 213: Data conversion device 114, 214: Laser section 115, 215: Camera Department 116, 216: Scanner 117, 217: Mirror section 118: Beam Splitter

Claims

Claim 1 A welding device comprising: a laser unit that irradiates a laser of a first wavelength toward a welding target; an illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a first camera that receives the light of the second wavelength reflected from the welding target to generate a first image; and a second camera that receives the light of the second wavelength reflected from the welding target to generate a second image, wherein the generation section of the first image and the generation section of the second image intersect. Claim 2 A welding device according to claim 1, further comprising a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and supplying a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal is in the form in which the first trigger signal is delayed by the length of the generation interval of the first image. Claim 3 A welding device according to claim 2, wherein when the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera is turned off, and the generation section of the second image overlaps with the transmission section of the first image and the turn-off section of the first camera. Claim 4 In claim 3, the lengths of the generation section of the first image and the transmission section of the first image are the same in the welding device. Claim 5 A welding apparatus according to claim 2, further comprising: a beam splitter that separates the light of the second wavelength reflected from the welding target and transmits it to the first camera and the second camera, respectively; a scanner that adjusts the propagation direction of the laser and the light of the second wavelength reflected from the welding target; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength reflected from the welding target from the scanner; and a second mirror that receives the light of the second wavelength from the first mirror and transmits it to the beam splitter. Claim 6 In claim 5, the light of the second wavelength, separated by the beam splitter and transmitted to the first camera and the second camera, is a welding device having the same phase. Claim 7 In claim 5, a welding device in which the second wavelength is included in a range of 400 nm or more and 700 nm or less. Claim 8 A welding device comprising: a laser unit that irradiates a laser of a first wavelength toward a welding target; an illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a first camera that receives the light of the second wavelength reflected from the welding target to generate a first image; a second camera that receives the light of the second wavelength reflected from the welding target to generate a second image; a third camera that receives the light of the second wavelength reflected from the welding target to generate a third image; and a fourth camera that receives the light of the second wavelength reflected from the welding target to generate a fourth image, wherein the sections in which each of the first to fourth images is generated are not overlapped with one another and are repeated sequentially. Claim 9 A welding device according to claim 8, further comprising a data processing device that controls the first to fourth cameras by supplying a first trigger signal to the first camera, supplying a second trigger signal to the second camera, supplying a third trigger signal to the third camera, and supplying a fourth trigger signal to the fourth camera, wherein the first trigger signal is in the form of a pulse, the second trigger signal is in the form of the first trigger signal delayed by the length of the generation interval of the first image, the third trigger signal is in the form of the second trigger signal delayed by the length of the generation interval of the second image, and the fourth trigger signal is in the form of the third trigger signal delayed by the length of the generation interval of the third image. Claim 10 A welding device according to claim 9, wherein when the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the fourth trigger signal is at a high level, the fourth camera generates the fourth image and transmits the generated fourth image to the data processing device, and when the fourth trigger signal is at a low level, the fourth camera is turned off, and the generation section of the fourth image overlaps with the transmission section of the first image and the turn-off section of the first camera. Claim 11 A welding device comprising: a laser unit that irradiates a laser of a first wavelength toward a welding target; a first illumination unit that irradiates light of a second wavelength different from the first wavelength onto a laser irradiation area of ​​the welding target; a second illumination unit that irradiates light of a third wavelength different from the first wavelength and the second wavelength onto the laser irradiation area of ​​the welding target; a first camera that receives light of the second wavelength reflected from the welding target to generate a first image; and a second camera that receives light of the third wavelength reflected from the welding target to generate a second image, wherein the generation section of the first image and the generation section of the second image intersect. Claim 12 A welding device according to claim 11, further comprising a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and supplying a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal is in the form in which the first trigger signal is delayed by the length of the generation interval of the first image. Claim 13 A welding device according to claim 12, wherein when the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera is turned off, and the generation section of the second image overlaps with the transmission section of the first image and the turn-off section of the first camera. Claim 14 A welding apparatus according to claim 11, further comprising: a scanner that adjusts the propagation direction of the laser, the light of the second wavelength reflected from the welding target, and the light of the third wavelength reflected from the welding target; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength and the light of the third wavelength reflected from the welding target from the scanner; a second mirror that transmits the light of the second wavelength received from the first mirror to the first camera and transmits the light of the third wavelength received from the first mirror; and a third mirror that transmits the light of the third wavelength received from the second mirror to the second camera. Claim 15 A welding device according to claim 11, wherein the second wavelength is included in a range of 400 nm or more and 700 nm or less, and the third wavelength is included in a range of 200 nm or more and 400 nm or less. Claim 16 A welding device comprising: a laser unit that irradiates a laser of a first wavelength toward a welding target; a first illumination unit that irradiates light of a second wavelength different from the first wavelength to a first area of ​​the welding target; a second illumination unit that irradiates light of a third wavelength different from the first wavelength and the second wavelength to a second area of ​​the welding target different from the first area; a first camera that receives light of the second wavelength reflected from the first area of ​​the welding target to generate a first image; and a second camera that receives light of the third wavelength reflected from the second area of ​​the welding target to generate a second image, wherein the generation interval of the first image and the generation interval of the second image overlap. Claim 17 In claim 16, the welding device further comprises a data processing device that controls the first camera and the second camera by supplying a first trigger signal to the first camera and supplying a second trigger signal to the second camera, wherein the first trigger signal is in the form of a pulse and the second trigger signal has the same phase as the first trigger signal. Claim 18 A welding device according to claim 17, wherein when the first trigger signal is at a high level, the first camera generates the first image and transmits the generated first image to the data processing device, and when the first trigger signal is at a low level, the first camera is turned off, and when the second trigger signal is at a high level, the second camera generates the second image and transmits the generated second image to the data processing device, and when the second trigger signal is at a low level, the second camera is turned off. Claim 19 A welding device according to claim 16, further comprising: a scanner that adjusts the propagation direction of the laser, the light of the second wavelength reflected from the first region, and the light of the third wavelength reflected from the second region; a first mirror that receives the laser from the laser unit and transmits it to the scanner, and receives and transmits the light of the second wavelength reflected from the first region and the light of the third wavelength reflected from the second region from the scanner; a second mirror that receives the light of the second wavelength reflected from the first region from the first mirror and transmits it to the first camera, and receives and transmits the light of the third wavelength reflected from the second region from the first mirror; and a third mirror that receives the light of the third wavelength reflected from the second region from the second mirror and transmits it to the second camera. Claim 20 A welding device according to claim 11, wherein the second wavelength and the third wavelength are each included in a range of 400 nm or more and 700 nm or less.

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