KR101314553B1 - Welding state discrimination device having function of image transmission - Google Patents

Abstract

PURPOSE: A welding state detecting apparatus is provided to improve accuracy of the welding by determining place where the welding is insufficient. CONSTITUTION: A welding state detecting apparatus comprises the following: a hand shield (200); a wireless AP receiving compressed image data by using local area network through wireless transmission/reception part of the hand shield; a management server releasing the compression of the image data, and storing the thermal image; and a display unit outputting the thermal image. The hand shield produces thermal signal by converting optical image photoelectically which is input through far infrared ray lens when photographing the front side. The welding state detecting apparatus comprises: a thermal image camera (210) transmitting the thermal image photographed by a control unit comprising an A/D converter (225) in a video data form; the control unit (220) transmitting the video data to a wireless transmission/reception part (230) after compressing; and the wireless transmission/reception part transmitting the video data received from the control unit to the wireless AP through the local area wireless communication.

Description

Welding state detection device using welding surface with image transmission function {Welding state discrimination device having function of image transmission}

The present invention relates to a welding surface having an image transmission function and a welding state detection apparatus using the same, and more particularly, an image photographed by a thermal imaging camera mounted on a part of the welding surface during a welding operation such as a ship deck. Is transmitted to a management server through short-range wireless communication such as Wi-Fi and read in real time through an image output device such as a PC, thereby determining an area where welding is incomplete and improving the accuracy of welding. The welding state detection apparatus using the welding surface which has.

In general, welding two metals, plastics, and glass by melting or semi-melting each other is called welding. Welding is used for various purposes such as repairing pipes and steel.

Such welding has various methods such as gas welding, arc welding, resistance welding, etc., and accidents caused by intense light and spatter which are common in welding can be prevented frequently. Various welding surfaces have been developed. As a result, safety accidents due to intense light and spatter generated during welding have been greatly reduced.

On the other hand, in the case of simple pipe joining or a small scale steel joining, even when welding is insufficient or cracks, the weld can be scraped and rewelded to make the durability strong.

However, when welding a large ship deck, even a skilled worker may make a mistake that welding is not made with a certain strength and thickness. For example, in the case of a ship, if the welding is insufficient, some gaps are formed or the steel plate that is joined is dropped. Water can seep into the gap, leading to a catastrophic disaster in which the ship sinks in the worst case.

In addition, large-scale ship welding operations must be completely removed and re-welded, rather than scraping and rewelding the weld beads of the weld, so the economic and time waste caused by unstable welding conditions can never be ignored. It is true that there is no.

In order to solve this problem, the Republic of Korea Patent Registration No. 10-0605455 (Registration Date 2006.07.20) "Automatic digital welding helmet using a camera" (hereinafter referred to as "Patent Document 1") has been registered.

As shown in FIG. 1, Patent Document 1, which is a conventional invention, includes a monitoring unit for monitoring a welding operation through a camera selected from a plurality of cameras, a controller for selecting and controlling any one of a plurality of cameras, and the selected camera. In the digital welding helmet consisting of an LCD monitor configured inside the welding helmet for displaying the received image, the control unit is a camera selection module for selecting any one of the plurality of cameras by the camera selection button and the video storage switch is turned on And a video storage module for storing the video received from the camera selected by the camera selection module in a memory.

According to Patent Document 1 described above, since the operator can work while checking the welding operation image transmitted from the camera with an LCD monitor or the like, there is an advantage that the harmful light is naturally shielded and no malfunction occurs at all.

However, according to the Patent Document 1, the hindrance due to harmful light generated during welding work has been eliminated, but there is a limit in determining the welding degree, strength, etc. of the welded portion by photographing the welding process with a general camera.

In addition, since the welding image is checked after the operation by the memory mounted on the helmet, it is impossible to manage and supervise the welding operation in real time, and there is a problem that rework is not easy if the welding part is completely cooled.

Patent Registration No. 10-0605455 (Registration Date 2006.07.20) "Automatic digital welding helmet using a camera"

An object of the present invention has been proposed to improve such a conventional problem, the image taken by the thermal imaging camera mounted on one side of the welding surface during the welding operation to manage via short-range wireless communication such as Wi-Fi (Wi-Fi) By transmitting to a server and reading in real time through an image output device such as a PC, it is to provide a welding surface having a video transmission function and the welding state detection device using the image transmission function that can determine where the welding is incomplete to increase the accuracy of welding.

According to an embodiment of the present invention for achieving the above object,

It is mounted to one side of the welding surface having a harmful ray blocking function facing forward to generate a thermal image signal by photoelectric conversion of the optical image input to the far-infrared lens when photographing the front of the welding surface wearer and includes an A / D converter A thermal imaging camera for transmitting the thermal image captured by the controller in the form of image data; and mounted inside the welding surface to receive the image data, and converts the analog amount into a digital amount by an A / D converter. A control unit for compressing and transmitting the compressed data to a wireless transmitting / receiving unit; And a welding surface having an image transmission function, characterized in that it comprises a wireless transmission / reception unit for transmitting the compressed image data received from the control unit to a wireless AP through short-range wireless communication.

Here, it is assumed that a switch for operating the thermal imaging camera is mounted on one side of the welding surface as a means for solving the problem.

A welding state detection device using a welding surface having the above-described image transmission function,

A wireless AP receiving the compressed image data through a short range wireless communication network through a wireless transmitting / receiving unit of the welding surface; and decompressing the compressed image data received from the wireless AP, and then photographing a thermal image image. And a management server for storing; and a display unit for outputting the thermal image stored in the management server.

Here, the management server reads the thermal image to determine whether the welding operation progress rate is constant in a specific section of the welding portion, or whether it is out of a predetermined temperature range error to detect the presence or absence of defects in the welding state It is done.

As described above, according to the welding surface having the image transmission function of the present invention and a welding state detection apparatus using the same,

As well as blocking accidents caused by spatter or harmful rays generated during welding, the process of welding work is taken with a thermal imaging camera, and the captured image is recorded through a wireless transmitter / receiver mounted on the welding surface. By transmitting to a management server through short-range wireless communication such as Wi-Fi) and reading in real time through an image output device such as a PC, it is possible to determine a spot where welding is incomplete and immediately correct and supplement the welding to increase the accuracy of welding.

As a result, it is possible to minimize the economic and time waste caused by the failure of the welding operation, and in particular, it is possible to generate more complete welding results in a large welding operation.

1 is a structural diagram of a fully automatic digital welding helmet using a camera according to an embodiment of the prior art.
2 is a structural diagram of a welding surface according to an embodiment of the present invention.
3 is a block diagram of a thermal image processing of a welding surface according to an embodiment of the present invention.

Although the present invention may be modified in various ways and may have various embodiments, it is not intended to limit the present invention to specific embodiments, and all changes, equivalents, and substitutes included in the technical spirit and technical scope of the present invention. It will be understood to include.

In addition, in the terminology selection of the present application, the terms may be used to describe various components, but the components should not be limited by the terms, and the terms distinguish one component from other components. It is mentioned that it was used for the purpose of doing so.

When a component is referred to as being "connected" to another component, it should be understood that there may be a direct connection or connection to that other component, but there may be other components in between.

On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Such terms, such as "including," include features, numbers, steps, operations, components, parts, or combinations thereof. It is to be understood that the present invention is intended to designate and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, Terms such as those defined in the dictionary should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. It is a bar.

Hereinafter, the present invention will be described in detail with reference to the drawings with respect to the welding surface having an image transmission function and the welding state detection apparatus using the same.

2 is a structural diagram of a welding surface according to an embodiment of the present invention.

As shown in FIG. 2, the present invention is mounted to one side of the welding surface 200 having a harmful ray blocking function to face forward, and thermally converts an optical image input to a far-infrared lens when photographing the front of the welding surface wearer. A thermal imager 210 which generates an image signal and transmits a thermal image captured by a controller including an A / D converter in the form of image data; and is mounted inside the welding surface 200 to receive the image data. A control unit 220 converting the analog amount into a digital amount by an A / D converter 225, compressing the image data, and transferring the image data to a wireless transmission / reception unit; And a wireless transmitter / receiver 230 for transmitting the compressed image data received from the controller 220 to a wireless AP through short-range wireless communication.

Here, the harmful light blocking function of the welding surface 200 may be installed by alternatively equipped with a device such as a basic shading window 205, or an automatic shading window, as in the known art, the shading window 205 is It can be configured to be coupled to the both sides of the welding surface 200 in a hinged manner to open and close.

The thermal imaging camera 210 is mounted inside the welding surface 200, and the upper portion of the center of the light blocking window 205 so that the line of sight of the welding worker and the focal point of the thermal imaging camera 210 are as close as possible. It can be mounted so that only the lens part is exposed.

In another embodiment, when the welding surface 200 is manufactured in the form of a well-known helmet, the thermal imaging camera 210 may be attached to the upper end of the helmet so that the welded portion is photographed, but the thermal imaging camera 210 Positional and structural shape changes should not limit the technical spirit of the present invention.

In addition, the thermal imaging camera 210 may include ancillary functions such as a welding work time and a date when photographing and various functions may be further modified according to the characteristics of the manufacturer.

Subsequently, the control unit 220 includes an A / D converter 225 capable of converting an analog amount into a digital amount and a function capable of compressing the same. It may be configured to further include.

The above-described thermal imaging camera 210, the controller 220, and the wireless transmission / reception unit 230 are electrically connected to each other, and a switch for operating the thermal imaging camera 210 on one side of the welding surface 200. 215 is mounted, the welding surface 200 may be to supply power by a rechargeable or direct method.

3 is a block diagram of a thermal image processing of a welding surface according to an embodiment of the present invention.

A welding state detection apparatus using a welding surface having an image transmission function as shown in FIG. 3, wherein the compressed AP receives the compressed image data through a short range wireless communication network through a wireless transmitting / receiving unit 230 of the welding surface. And a management server 310 for decompressing the compressed image data transmitted from the wireless AP 300 and storing the captured thermal image image; and the thermal image stored in the management server 310. And a display unit 320 for outputting an image.

Here, the management server 310 reads the thermal image to determine whether the welding operation progress rate is constant in a specific section of the welding portion, or whether the deviation from the preset temperature range error to detect the presence of defects in the welding state It features.

In this case, the welding operation progress rate may be overlooked, for example, a minute difference of about 1 to 2 seconds when the worker welds the welded portion, but it means an average progress speed that does not have an error of excessive or short time. Note that there may be some differences.

In addition, the display 320 may be output in various forms such as a monitor, a TV in more detail, but in general, it is preferable that the device outputs the thermal image through a PC, which is suitable for the thermal image camera through a PC. The software can be installed to enable more sophisticated weld identification using a variety of functions such as editing, saving, transferring, and replaying.

A welding surface having an image transmission function of the present invention configured as described above and a welding state detection apparatus using the same will be described in more detail with reference to an embodiment.

In performing large-scale welding operations such as a ship deck, when the welding worker selects the welded portion and uses the welding surface having the image transmitting function of the present invention when the welding is performed in one direction, the welding surface 200 is immediately before the welding operation. When the switch 215 mounted on one side of the side is turned on, photographing of the thermal imaging camera 210 is started.

When the welding surface 200 which is in the on state is brought into close contact with the face part and the welding is performed, the image is photographed due to the thermal imaging camera 210 positioned at the upper center of the welding surface 200. The captured thermal image is transmitted to the control unit 220 in the form of image data in real time. In this case, the analog amount of the image data is converted into a digital amount by the A / D converter 225 of the control unit 220. Image data is compressed by the controller 220.

The compressed image data is transmitted to the wireless AP 300 by the wireless transmitter / receiver 230 using a short range wireless communication network, and the wireless AP 300 transmits the compressed image data to the management server 310. Will be sent.

In this case, the management server 310 decompresses the compressed image data transmitted from the wireless AP 300 and stores it in the management server 310 to display an image such as a PC, monitor, etc. 320 Through the thermal image can be output.

In addition, the management server 310 reads the thermal image to determine whether the progress of the welding operation is constant in a specific section of the welding portion, or whether to deviate from the predetermined temperature range error to detect the presence of defects in the welding state It features.

For example, if the welding server is set to 2800 ℃ ~ 3000 ℃ as the welding allowable temperature before the welding operation, if the working time in a certain welding portion is longer than necessary during the welding operation is overheated state exceeding 3000 ℃ At this time, the management server 310 by using a warning sound, or a warning message through the display unit 320 may allow the operator to request attention or correction work.

Subsequently, when the working time at the specific weld is too short, welding may be performed at 2800 ° C. or less. In this case, as described above, the management server 310 may use a warning sound or a warning message through the display 320 to allow an operator to request attention or corrective action.

For example, even if the working time is constant, the temperature may vary depending on the relationship of the welding distance, which may cause a defect in the welding state. In such a case, the management server 310 may detect a case where the temperature falls or falls short of a preset temperature by reading a temperature change in the thermal image.

As a result, the operator can visually confirm the degree of high heat generated during welding in reading the welded portion, and if the temperature of the specific welded portion rises above the average or falls below the average, the part determines that the welding is insufficient. I can make it.

In addition, when looking at a certain distance, if the welding time takes too long or too short at a certain distance, it can also be determined that the welding is not constant, and the manager or a third person who is not performing the work is judged to the worker Instructing correction has the advantage of allowing immediate correction and correction of welds that are not completely cooled.

The welding surface having the image transmission function of the present invention configured as described above and the welding state detection device using the same can immediately increase the accuracy of the welding during the welding work, such as a large-scale ship deck, by immediately correcting and repairing a defective portion. It is effective and can minimize the economic and time waste caused by the failure of welding operation.

As described above, although the welding surface having the image transmission function of the present invention and the welding state detection apparatus using the same have been described by a limited embodiment and drawings, the present invention is not limited to the above embodiment, and the present invention belongs to Those skilled in the art can make various modifications and additional variations from this description.

Therefore, the scope of the present invention should not be limited to the described embodiment, but should be interpreted within the scope of the technical spirit of the present invention.

200: welding surface 205: shading window
210: thermal imaging camera 215: switch
220: control unit 225: A / D converter
230: wireless transmission / reception unit 300: wireless AP
310: management server 320: display unit

Claims (4)

delete delete A control unit is mounted on one side of the welding surface having a harmful ray blocking function facing forward to generate a thermal image signal by photoelectric conversion of the optical image input to the far infrared lens during the front-side photographing of the welding surface wearer, and includes an A / D converter. A thermal imaging camera that transmits the thermal image photographed in the form of image data, and is mounted inside the welding surface to receive the image data, and converts the analog amount into a digital amount by an A / D converter, and converts the image data. A welding surface including a control unit for compressing and transmitting the compressed image data received from the control unit to the wireless AP through a short range wireless communication;
A wireless AP receiving the compressed image data through a short range wireless communication network through a wireless transmitting / receiving unit of the welding surface;
A management server which decompresses the compressed image data received from the wireless AP and stores the thermal image photographed;
It includes a display unit for outputting the thermal image stored in the management server,
The management server reads the thermal image to determine whether the welding operation speed is constant in a specific section of the welding portion, or whether the deviation is within a predetermined temperature range error to detect the presence of defects in the welding state Welding state detection device using a welding surface having a function. delete

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