CN210604481U - Non-contact automatic detection device for weld defects - Google Patents
Non-contact automatic detection device for weld defects Download PDFInfo
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- CN210604481U CN210604481U CN201921064641.8U CN201921064641U CN210604481U CN 210604481 U CN210604481 U CN 210604481U CN 201921064641 U CN201921064641 U CN 201921064641U CN 210604481 U CN210604481 U CN 210604481U
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- 238000001514 detection method Methods 0.000 title claims abstract description 65
- 238000003466 welding Methods 0.000 claims abstract description 83
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims description 32
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- 239000003973 paint Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
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- 230000005284 excitation Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 5
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- 230000035515 penetration Effects 0.000 description 4
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- 230000005307 ferromagnetism Effects 0.000 description 2
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- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 238000005493 welding type Methods 0.000 description 1
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Abstract
The utility model relates to a welding seam defect nondestructive test technical field especially relates to a non-contact welding seam defect automated inspection device. By drive arrangement, adjusting device, high definition digtal camera, the host computer, signal generator, laser pulse appearance, the automatic detection device who is used for welding defect that thermal infrared imager and spout a yard mark device constitute, can carry out non-contact automated inspection to different kind welding seam defects, the non-contact automatic detection device of welding seam defect acquires the welding seam trend through high definition digtal camera, adopt laser pulse appearance transmission initiative laser pulse to carry out thermal excitation to the welding seam region, thermal infrared imager acquires the infrared thermal image map, the host computer system carries out image processing to the infrared thermal image map, discern the welding seam defect in real time, control spouts a yard mark device and carries out the automatic identification of welding seam defect position. The utility model discloses can realize the non-contact intelligence continuous detection of welding seam defect to can effectively discern all welding seam defects, have energy-concerving and environment-protective, high-efficient accurate, intelligent continuous and safe and reliable's characteristics.
Description
Technical Field
The utility model relates to a welding seam defect nondestructive test technical field especially relates to a non-contact welding seam defect automated inspection device.
Background
The welding seam defects are defects formed in the welding process of a welding joint part and mainly comprise air holes, slag inclusion, incomplete penetration, incomplete fusion and the like, and because metal materials are influenced by factors such as materials, welding processes and the like in the welding process, the welding seam defects are difficult to avoid, and can reduce the cross-sectional area of the welding seam, generate stress concentration, reduce the bearing capacity and fatigue strength of the structure and lay hidden troubles for the structure safety. Therefore, the efficient and accurate detection of weld defects is the key to ensure the welding quality.
In the prior art, the nondestructive detection technology of the weld defects mainly comprises ultrasonic detection, radiographic inspection, magnetic powder detection, penetration detection and the like; the ultrasonic detection is to detect internal defects by using the properties of attenuation generated when ultrasonic waves propagate in a medium and reflection generated when the ultrasonic waves meet a cross section, and has a wide application range, but has low reflected waves to some fine cracks and unfused parts, so that detection omission is easily caused; the radiographic inspection is to use various rays to penetrate through a workpiece to be detected, the rays are attenuated, absorbed or scattered due to structural discontinuity, then an image is formed on a recording medium, and the weld defects of the thin-wall workpiece can be intuitively measured through real-time imaging, but the radiographic inspection is harmful to a human body and has high price and protection cost; magnetic particle inspection is to use ferromagnetic material to be magnetized, and magnetic force lines on the surface of a workpiece are locally distorted due to discontinuity, and visible magnetic traces can be formed by adsorbing and applying magnetic particles on the surface of the workpiece, so that the discontinuity position, size, shape and severity are displayed, however, the magnetic particle inspection is not suitable for non-ferromagnetic material, and the defect of deeper inner part from the surface can not be detected; the penetration detection means that after penetrating fluid is applied to the surface of a part, the penetrating fluid can penetrate into the surface opening defect under the action of capillary phenomenon for a certain time, after redundant penetrating fluid is removed and dried, a developer is applied to the surface of a workpiece, and under the action of a certain light source, penetrating fluid traces at the defect position are displayed, so that the appearance and distribution state of the defect are detected, and the penetration detection has low sensitivity, higher requirement on surface smoothness and incapability of detecting depth.
The welding seam detection technology has limitations, and all welding seam defects cannot be effectively detected; in addition, the welding seam detection method in the prior art needs manual operation and interpretation, so that the subjectivity of welding seam defect detection is increased; and the detection process is mostly intermittent detection, the detection efficiency is low, and the detection flow is complicated.
In view of the above problems, the designer is actively researched and innovated based on the practical experience and professional knowledge that are rich for years in engineering application of such products and by using the theory, so as to create an infrared intelligent detection system and method for weld defects, and the infrared intelligent detection system and method are more practical.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a non-contact automatic detection device for weld defects, which realizes the automatic identification and marking of welds.
In order to achieve the above object, the utility model provides an automatic detection device of non-contact welding seam defect, this system includes: the system comprises a laser pulse instrument, a thermal infrared imager, an upper computer, a signal generator and a code spraying and marking device;
the laser pulse instrument is connected with the signal generator and is used for emitting laser pulses to thermally excite the welding seam area;
the signal generator is connected with the upper computer and used for controlling the output characteristic of the laser pulse instrument;
the thermal infrared imager is connected with the upper computer and used for acquiring an infrared thermal image of the thermally excited welding seam area and transmitting the infrared thermal image to the upper computer;
the upper computer controls the signal waveform characteristics of the signal generator and processes the infrared thermal image to identify the defects of the welding seam;
the code spraying and marking device is connected with the upper computer, and when the upper computer identifies the weld defects, the code spraying and marking device automatically marks the positions of the weld defects.
Preferably, the system further comprises a driving device, wherein the laser pulse instrument, the thermal infrared imager, the upper computer and the signal generator or the laser pulse instrument, the thermal infrared imager, the upper computer, the signal generator and the code spraying and marking device are arranged on the driving device, and the driving device further comprises a chassis, wheels, a driving part, a steering controller and a box body and is used for driving the driving device to move and steer.
The chassis is a reinforced steel plate, the middle part of the chassis is provided with a hole, the box body is arranged at the upper part of the hole, and the wheels are supported at the four corners of the chassis; the driving part is arranged at the tail part of the chassis and consists of a motor, a transmission shaft and a gear, the gear and the transmission shaft transmit power through chain transmission, and the whole structure is driven to move forwards through the rear wheel; the steering controllers are arranged on two sides of the front wheel and control the steering of the front wheel through the servo motor and the eccentric pull rod;
the box body is also provided with a high-definition camera which is connected with the upper computer and used for conveying the image of the welding line trend; the steering controller is connected with the upper computer, and the advancing path of the detection device is automatically adjusted according to the welding seam trend picture acquired by the high-definition camera, so that the detection device is constantly positioned right above the welding seam.
Preferably, the code-spraying marking device further includes: a spray head, a hydraulic pump and fluorescent paint;
the nozzle is connected with an upper computer, the upper computer performs real-time image processing on the infrared thermal image, and when the weld defects are identified, the upper computer controls the nozzle to spray fluorescent paint to mark the positions of the weld defects.
Preferably, an adjusting device is connected to the driving device, and the mechanical adjusting device further includes: the lifting device, the transverse connecting rod and the angle rotating device;
the three angle rotating devices are fixed on the transverse connecting rod, the laser pulse instrument, the thermal infrared imager and the code spraying and marking device are fixed on the angle rotating devices, and the angle rotating devices are used for adjusting the angles of the laser pulse instrument, the thermal infrared imager and the code spraying and marking device;
two ends of the transverse connecting rod are fixed on the lifting device, and the height of the transverse connecting rod is adjusted through the movement of the lifting device;
the lifting device and the angle rotating device are connected with the upper computer.
The utility model has the advantages that: the utility model discloses an initiative excitation laser pulser transmission laser pulse carries out thermal excitation to the welding seam region, and thermal infrared imager acquires the infrared thermograph, and the host computer system carries out image processing to the infrared thermograph, distinguishes the welding seam defect in real time, compares with prior art, the utility model discloses a welding seam defect detecting system can not only discern the welding seam surface, can also discern welding seam inside, no matter ferromagnetism or non-ferromagnetism are all discernable, carries out incessant automated inspection and carries out the automation to the defect position and spout the sign, has realized the intelligent detection of welding seam, has improved the defect identification accuracy moreover.
Furthermore, the utility model discloses other detection technique is safe and reliable more relatively, and the staff need not the relevant equipment of direct contact during the detection, has improved and has detected the security.
Finally, the utility model discloses can follow the welding seam position automatically, adjustment system traffic direction and route are by equipment automatic operation completely, have reduced loaded down with trivial details work flow, have reduced measurement personnel work load.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a non-contact automatic detection device for weld defects in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving device in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an adjusting device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a steering controller according to an embodiment of the present invention.
Reference numerals: the system comprises a laser pulse instrument 1, a thermal infrared imager 2, a host computer 3, a code spraying and marking device 4, a box 5, a signal generator 6, a base 7, a motor 8, a gear 9, a lifting device 10, a transverse connecting rod 11, an angle rotating device 12, a chassis 13, a transmission shaft 14, a steering wheel 15, a steering controller 16, a high-definition camera 17, a non-steering wheel 18 and a beam 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The non-contact automatic detection device for the weld defects as shown in FIG. 1 comprises: the system comprises a laser pulse instrument 1, a thermal infrared imager 2, an upper computer 3, a code spraying and marking device 4 and a signal generator 6;
the laser pulse instrument 1 is connected with the signal generator 6 and is used for emitting laser pulses to thermally excite the welding seam area;
the signal generator 6 is connected with the upper computer 3 and is used for controlling the output characteristic of the laser pulse instrument 1;
the thermal infrared imager 2 is connected with the upper computer 3 and used for acquiring an infrared thermal image of the thermally excited weld joint area and transmitting the infrared thermal image to the upper computer 3;
the upper computer 3 controls the signal waveform characteristics of the signal generator 6 and processes the infrared thermal image to identify the defects of the welding seam;
the code spraying and marking device 4 is connected with the upper computer 3, and when the upper computer 3 identifies the weld defects, the code spraying and marking device 4 automatically marks the positions of the weld defects.
In the above embodiment, the signal generator 6 controls the laser pulse instrument 1 to emit laser pulses to the weld position to thermally excite the weld area, the thermal infrared imager 2 carries out thermal image acquisition on the weld position, transmits signals to the upper computer 3, processes the images through the upper computer 3, identifies the weld defects, and through the arrangement of the code spraying and marking device 4, the manual labor in the prior art is reduced, the conditions of missing detection and missing mark caused by human factors can be avoided, and the detection accuracy is improved. Compared with the prior art, realized the intelligent detection to the welding seam, and characteristics such as the amplitude, the frequency of reasonable setting signal generator 6 can realize the nondestructive test to metal, alloy, plastics, pottery and combined material, because the thermal imaging picture can observe the surface, can observe the internal conditions again, consequently realized the detection to multiple welding seam defect.
Specifically, the code-spraying and marking device 4 further includes: a spray head, a hydraulic pump and fluorescent paint; the nozzle is connected with the upper computer 3, and the upper computer 3 carries out real-time image processing to the infrared thermal image, and when discerning the welding seam defect, the upper computer 3 control nozzle blowout fluorescent paint, marks welding seam defect position department. The fluorescent paint is colored paint, and can be yellow, green, red, blue and other colors which can be distinguished from the welding materials.
In order to improve the efficiency of weld joint detection, as shown in fig. 1 and fig. 2, the system further includes a driving device, the laser pulse instrument 1, the thermal infrared imager 2, the upper computer 3, the signal generator 6, the high definition camera 17, and the code spraying and marking device 4 are arranged on the driving device, and the driving device further includes a driving member for driving the driving device to move. In the above embodiment, the driving device is arranged, so that the whole system can move along the welding line, detect while moving, and perform the labeling operation by the code spraying and marking device 4. After the driving device moves from the welding seam area, marks of the positions of the welding seam defects are reserved, compared with the prior art, manual holding of relevant instruments is not needed, the positions of the welding seams are not needed to be judged manually, complex work flows are reduced, workload of detection personnel is reduced, and work efficiency of welding seam detection is improved.
Further, in order to improve the applicability of the system, as shown in fig. 3, the driving device further includes a mechanical adjusting device, and the mechanical adjusting device further includes: a lifting device 10, a transverse connecting rod 11 and an angle rotating device 12;
the three angle rotating devices 12 are all fixed on the transverse connecting rod 11, the laser pulse instrument 1, the thermal infrared imager 2 and the code spraying and marking device 4 are fixed on the angle rotating devices 12, and the angle rotating devices 12 are used for adjusting the angles of the laser pulse instrument 1, the thermal infrared imager 2 and the code spraying and marking device 4;
two ends of the transverse connecting rod 11 are fixed on the lifting device 10, and the height of the transverse connecting rod 11 is adjusted through the movement of the lifting device 10;
the lifting device 10 and the angle rotating device 12 are both connected with the upper computer 3. It should be noted here that the angle rotating device 12 may be a servo motor or a rotary cylinder, and the laser pulser 1, the thermal infrared imager 2 and the code spraying and marking device 4 are fixed by the corresponding workpieces, and then the angle is adjusted. And elevating gear 10 can be the lift cylinder, realizes the regulation to transverse connection pole 11 height through the lift of lift cylinder to the realization is to the not co-altitude, the detection of different angle welding seams, has improved the suitability that the welding seam detected. And the angles of the angle rotating devices 12 are respectively adjusted through the upper computer 3, so that the welding seam welding machine is suitable for welding seams with various structures.
As a preferable example of the above embodiment, as shown in fig. 1 and 2, the driving device of the present invention includes a beam 19, a chassis 13, a motor 8, a transmission shaft 14, a gear 9, a non-steering wheel 18, a steering wheel 15, a case 5, and a steering controller 16;
Please refer to fig. 1 and fig. 2, still be provided with high definition digtal camera 17 on the box 5, high definition digtal camera 17 is connected with host computer 3, but high definition digtal camera 17 real-time transmission welding seam move towards the image to host computer 3, host computer 3 is according to the trend of welding seam, and automatic regulation and control steering controller 16 adjusts detection device's direction of travel for detection device is in directly over the welding seam constantly, and is applicable in the full-automatic intellectual detection of all kinds of welding seam moves towards.
Referring to fig. 4, the steering controller 16 is connected to the upper computer 3, is mounted at the steering wheel 15, is fixed on a cross beam 19 at the front of the chassis, and consists of a servo motor and an eccentric pull rod. The upper computer 3 controls the servo motor to drive the eccentric pull rod according to the weld seam trend image transmitted by the high-definition camera 17, and adjusts the deflection angle of the steering wheel, so that the detection device moves forwards along the weld seam.
Compared with the prior detection technology, the utility model has the advantages that firstly, the intelligent detection of the welding seam is realized, the welding seams with different trends can be continuously and automatically detected, and the automatic code spraying marking is carried out on the defect position; secondly, the accuracy of defect identification is improved, the utility model combines the laser excitation applied to the welding seam by the active excitation laser pulse instrument and the infrared thermal imaging technology, and can be suitable for the welding seam detection of various welding forms; thirdly, the work flow is reduced, the utility model is completely automatically operated by the equipment, the complex work flow is reduced, and the workload of the detection personnel is reduced; fourthly, the defect marking accuracy is improved, the defect position can be accurately marked, and powerful support is provided for the repair of the later-stage welding line; fifthly, the detection safety is improved, compared with other detection technologies, the utility model is safer and more reliable, and workers do not need to directly contact related equipment during detection; the utility model has the characteristics of energy-concerving and environment-protective, high-efficient accurate, intelligent continuous, safe and reliable.
The utility model discloses automatic detection device of non-contact welding seam defect's detection steps as follows:
arranging an infrared intelligent detection system for the weld defects right above the weld, and enabling the infrared intelligent detection system to move towards the length direction of the weld;
adjusting the height and the angle between the laser pulse instrument, the thermal infrared imager and the code spraying and marking device and the welding line to enable the laser pulse instrument, the thermal infrared imager and the code spraying and marking device to be in the optimal working position;
starting a driving device, a high-definition camera, a steering controller, an upper computer, a signal generator, a laser pulse instrument, a thermal infrared imager and a code spraying and marking device;
the upper computer controls the driving device to move forward along the welding seam, the upper computer controls the steering controller to adjust the moving path of the detection device according to the welding seam trend image transmitted by the high-definition camera, the upper computer system controls the signal generator, the signal generator controls the laser pulse instrument to emit laser pulses to thermally excite the welding seam area, and the upper computer system controls the infrared thermal imager to acquire an infrared thermal image and transmit the infrared thermal image to the upper computer system;
and the upper computer system carries out image processing on the infrared thermograph, identifies the weld defects in real time, and controls the code spraying and marking device to automatically mark the positions of the weld defects by signals.
In the above embodiment, the non-contact automatic detection device for welding defects, which is composed of the driving device, the adjusting device, the high definition camera, the steering controller, the upper computer system, the signal generator, the laser pulse instrument, the thermal infrared imager and the code spraying and marking device, can detect different types of welding seams, the non-contact automatic detection device for welding defects acquires the trend of the welding seams through the high definition camera, the steering controller is used for automatically adjusting the advancing path of the detection device, the active excitation laser pulse instrument is adopted for emitting laser pulses to thermally excite a welding seam area, the thermal infrared imager acquires an infrared thermal image, the upper computer system performs image processing on the infrared thermal image, the welding seam defects are identified in real time, and the code spraying and marking device is controlled to automatically identify the positions of the welding seam defects.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A non-contact automatic detection device for weld defects is characterized in that the system comprises: the system comprises a laser pulse instrument, a thermal infrared imager, an upper computer, a signal generator and a code spraying and marking device;
the laser pulse instrument is connected with the signal generator and is used for emitting laser pulses to thermally excite the welding seam area;
the signal generator is connected with the upper computer and used for controlling the output characteristic of the laser pulse instrument;
the thermal infrared imager is connected with the upper computer and used for acquiring an infrared thermal image of the thermally excited welding seam area and transmitting the infrared thermal image to the upper computer;
the upper computer controls the signal waveform characteristics of the signal generator and processes the infrared thermograph to identify weld defects;
the code spraying and marking device is connected with the upper computer, and when the upper computer identifies the weld defects, the code spraying and marking device automatically marks the positions of the weld defects.
2. The non-contact automatic detection device for the weld defects according to claim 1, further comprising a driving device, wherein the laser pulse instrument, the thermal infrared imager, the upper computer, the signal generator and the code spraying and marking device are arranged on the driving device, and the driving device further comprises a chassis, wheels, a driving part, a steering controller and a box body, and is used for driving the driving device to move and steer;
the chassis is a reinforced steel plate, the middle part of the chassis is provided with a hole, the box body is arranged at the upper part of the hole, and the wheels are supported at the four corners of the chassis; the driving part is arranged at the tail part of the chassis and consists of a motor, a transmission shaft and a gear, the gear and the transmission shaft transmit power through chain transmission, and the whole structure is driven to move forwards through the rear wheel; the steering controllers are arranged on two sides of the front wheel and control the steering of the front wheel through the servo motor and the eccentric pull rod;
the box body is also provided with a high-definition camera which is connected with the upper computer and used for conveying the image of the welding line trend; the steering controller is connected with the upper computer, and the advancing path of the detection device is automatically adjusted according to the welding seam trend picture acquired by the high-definition camera, so that the detection device is constantly positioned right above the welding seam.
3. The automatic non-contact weld defect detection device according to claim 2, wherein the code-spraying marking device further comprises: a spray head, a hydraulic pump and fluorescent paint;
the nozzle is connected with an upper computer, the upper computer performs real-time image processing on the infrared thermal image, and when the weld defects are identified, the upper computer controls the nozzle to spray fluorescent paint to mark the positions of the weld defects.
4. The automated non-contact weld defect detection apparatus according to claim 1, wherein the system further comprises an adjustment apparatus, the adjustment apparatus further comprising: the lifting device, the transverse connecting rod and the angle rotating device;
the three angle rotating devices are fixed on the transverse connecting rod, the laser pulse instrument, the thermal infrared imager and the code spraying and marking device are fixed on the angle rotating devices, and the angle rotating devices are used for adjusting the angles of the laser pulse instrument, the thermal infrared imager and the code spraying and marking device;
two ends of the transverse connecting rod are fixed on the lifting device, and the height of the transverse connecting rod is adjusted through the movement of the lifting device;
the lifting device and the angle rotating device are connected with the upper computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921064641.8U CN210604481U (en) | 2019-07-09 | 2019-07-09 | Non-contact automatic detection device for weld defects |
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| CN201921064641.8U CN210604481U (en) | 2019-07-09 | 2019-07-09 | Non-contact automatic detection device for weld defects |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125504A (en) * | 2021-04-19 | 2021-07-16 | 广西天正钢结构有限公司 | Steel structure weld joint detection process |
| CN113352087A (en) * | 2021-05-27 | 2021-09-07 | 北京交通大学 | Intelligent re-screwing system for air spring bolt |
-
2019
- 2019-07-09 CN CN201921064641.8U patent/CN210604481U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125504A (en) * | 2021-04-19 | 2021-07-16 | 广西天正钢结构有限公司 | Steel structure weld joint detection process |
| CN113125504B (en) * | 2021-04-19 | 2023-01-10 | 广西天正钢结构有限公司 | Steel structure weld joint detection process |
| CN113352087A (en) * | 2021-05-27 | 2021-09-07 | 北京交通大学 | Intelligent re-screwing system for air spring bolt |
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