CN214150556U

CN214150556U - Workpiece nondestructive testing device

Info

Publication number: CN214150556U
Application number: CN202022245432.2U
Authority: CN
Inventors: 陈光宇; 刘浒; 韩军; 陈仲武; 郑国强; 龙晋桓; 吴飞斌
Original assignee: Fujian Huadian Kemen Power Generation Co ltd; Quanzhou Institute of Equipment Manufacturing
Current assignee: Fujian Huadian Kemen Power Generation Co ltd; Quanzhou Institute of Equipment Manufacturing
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-09-07
Anticipated expiration: 2030-10-10

Abstract

A workpiece nondestructive detection device comprises a frame, an ultrasonic probe, a three-axis motion module, a motion control module, a structured light projector, a camera module and a computer, wherein the ultrasonic probe is arranged on the three-axis motion module and used for nondestructive detection of a workpiece to be detected, the three-axis motion module is arranged on the frame and used for driving the ultrasonic probe to move in the direction of X, Y, Z axes, the motion control module is connected with and controls the three-axis motion module to operate, the structured light projector and the camera module are arranged on the frame above the workpiece to be detected, and the computer is respectively connected with the structured light projector, the camera module, the ultrasonic probe and the motion control module; and can realize three-dimensional defect concatenation formation of image to the work piece that is surveyed, the device is automatic high, convenient operation.

Description

Workpiece nondestructive testing device

Technical Field

The utility model relates to a work piece nondestructive test device.

Background

In the mechanical processing industry, the internal cracks of materials are the most common defect form, steel materials in different batches have certain volatility, unstable quality factors of parts such as cracks are caused after heat treatment, and corresponding process parameters in the production process need to be adjusted according to defect characteristics. In addition, in the power industry, some high-hazard defects existing in welding seams cause missing detection of buried defects due to failure in timely detection, and the defects existing in the welding seams are gradually exposed along with the continuous increase of the operating hours of a unit and particularly along with the improvement of peak regulation requirements of a thermal power unit, so that the fillet welding seams are frequently leaked, and the reliable, safe and stable operation of the unit is seriously influenced. Therefore, it is very important to perform non-destructive inspection of the workpiece or the piping equipment.

Among the nondestructive inspection methods, ultrasonic flaw detection is a typical inspection method, which utilizes the characteristic that ultrasonic energy penetrates into the depth of a metal material and is reflected at the edge of an interface when entering another section from the section, and when ultrasonic beams pass from the surface of a part to the interior of the metal through a probe, reflected waves are respectively generated when meeting the defect and the bottom surface of the part, pulse waveforms are formed on a fluorescent screen, and the position and the size of the defect are judged according to the pulse waveforms. The traditional ultrasonic flaw detection process adopts a semi-automatic detection mode, a flaw detector holds an ultrasonic probe to slide on a detected workpiece in a hand mode, and information such as the size, type, position and the like of a flaw is judged according to experience through a visual inspection flaw detection mode. Therefore, automatic motion control is carried out on the basis of the traditional ultrasonic flaw detection, and the detection efficiency is greatly improved. Most of the existing automatic scanning devices are customized structural tools, and for some workpieces with complex structures, because the surface structures of the workpieces are bent or the welding structures are uneven, the automatic accurate scanning is difficult to carry out.

Disclosure of Invention

The utility model aims at providing a to the not enough of prior art, provide a full-automatic work piece nondestructive test device of adaptable different three-dimensional appearance work piece.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a work piece nondestructive test device, which comprises a frame, ultrasonic probe, the triaxial motion module, the motion control module, structured light projector, camera module and computer, ultrasonic probe sets up and is used for carrying out nondestructive test to the work piece that is surveyed on the triaxial motion module, the triaxial motion module sets up and is used for driving ultrasonic probe and moves in X, Y, Z axle directions on the frame, the motion control module is connected and control triaxial motion module operation, structured light projector and camera module set up on the frame of work piece top that is surveyed, the computer respectively with structured light projector, camera module and motion control module are connected.

The three-axis movement module comprises an X-axis movement module, a Y-axis movement module and a Z-axis movement module, an X-axis sliding seat capable of moving in the X-axis direction is arranged on the X-axis movement module, an ultrasonic probe is arranged on the X-axis sliding seat, the X-axis movement module is arranged on the Y-axis movement module and driven by the Y-axis movement module to move in the Y-axis direction, and the Y-axis movement module is arranged on the Z-axis movement module and driven by the Z-axis movement module to move in the Z-axis direction.

Z axle motion module includes four Z axle guide rails, slides and sets up Z axle slide and the gliding Z axle drive mechanism of drive Z axle slide on the Z axle guide rail, and four Z axle guide rails extend and the matrix arrangement along Z axle direction, Y axle motion module includes two Y axle guide rails, slides and sets up Y axle slide and the gliding Y axle drive mechanism of drive Y axle slide on the Y axle guide rail, and two Y axle guide rails extend and parallel mutual disposition along Y axle direction, and the Y axle guide rail can set up between two Z axle slides with moving in Z axle direction, X axle motion module includes X axle guide rail, slides and sets up X axle slide and the gliding X axle drive mechanism of drive X axle slide on X axle guide rail, and X axle guide rail extends and can set up between two Y axle slides with moving in Y axle direction along X axle direction.

The X-axis motion module and/or the Y-axis motion module and/or the Z-axis motion module are linear modules.

The frame is a rectangular frame structure.

The structured light projector and the camera module are arranged at intervals in the horizontal direction.

The projection angle of the structured light projector with respect to the Z-axis direction is 0-30 °.

The motion control module is a PLC controller.

The structured light projector and the camera module are arranged above the inner part of the frame, and a placing table for placing a workpiece to be tested is arranged below the inner part of the frame.

The utility model discloses following beneficial effect has:

the computer is used for controlling the projected pattern of the structured light projector and receiving the data collected by the camera module, and can process, analyze and calculate the three-dimensional structure data of the workpiece to be measured according to the technical principle of structured light three-dimensional imaging (see the prior art, Su obviously, Zhang Qiu, Chen wen Jing. structured light three-dimensional imaging technology [ J ]. Chinese laser 2014(02): 9-18.); the XYZ three-axis motion module is controlled according to the three-dimensional structure data, so that the motion of the ultrasonic probe in the XYZ three directions is realized, and the ultrasonic probe can accurately scan the workpiece to be detected; the computer can splice the detected workpiece defect signal obtained by ultrasonic detection data analysis and the three-dimensional morphology information, thereby obtaining the defect information of the detected workpiece in a three-dimensional structure, and the method has the advantages of high automation level, strong adaptability, convenient operation and the like.

The three-axis movement module adopts four Z-axis guide rails, two Y-axis guide rails and an X-axis guide rail to form a support of the three-axis movement module and is matched with the internal structure of the frame, so that the three-axis movement module occupies a small internal space of the frame, and the three-axis movement module is more favorable for the placement and detection of a workpiece to be detected.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a graph of sinusoidal fringes projected by a structured light projector.

Fig. 3 is a schematic diagram of the motion scanning track of the ultrasonic probe when the measured workpiece is a plane.

Fig. 4 is a schematic diagram of the motion scanning track of the ultrasonic probe when the measured workpiece is a curved surface.

1-workpiece to be detected, 2-ultrasonic probe, 3-X axis motion module, 4-motion control module, 5-X axis motion module, 6-Y axis motion module, 7-Z axis motion module, 8-camera module, 9-structured light projector, 10-frame, 11-computer, 901-sine stripe pattern when phase is 0, 902-sine stripe pattern when phase is pi/4, 903-sine stripe pattern when phase is pi/2, 904-sine stripe pattern when phase is 3 pi/4.

Detailed Description

Referring to fig. 1 to 4, a nondestructive inspection apparatus for a workpiece includes a frame 10, an ultrasonic probe 2, a three-axis motion module, a motion control module 4, a structured light projector 9, a camera module 8, and a computer 11.

The frame 10 is a cuboid or cube frame structure, the ultrasonic probe 2, the three-axis motion module, the motion control module 4, the structured light projector 9 and the camera module 8 are installed inside the frame 10, the workpiece 1 to be measured is placed below the inside of the frame 10 in the measuring process, a placing table for placing the workpiece to be measured is arranged at the center below the inside of the frame 10, the three-axis motion module comprises an X-axis motion module 5, a Y-axis motion module 6 and a Z-axis motion module 7 and is respectively connected with the motion control module 4, and the motion control module 4 is a PLC (programmable logic controller); the ultrasonic probe 2 is fixed on the X-axis motion module 5 and driven by the motion control module 4 to realize X, Y, Z motion in three directions in the frame 10, the computer 11 is respectively connected with the structured light projector 9, the camera module 8, the ultrasonic probe 2 and the motion control module 4, the ultrasonic probe 2 is used for detecting defects of the workpiece 1 to be detected and sending a defect detection signal to the computer 11 for analysis, thereby obtaining defect information inside the workpiece 1 to be detected.

The X-axis motion module 5 can control the ultrasonic probe 2 to slide along the X-axis direction under the driving of the motion control module 4; the Y-axis motion module 6 can control the ultrasonic probe 2 to slide along the Y-axis direction under the driving of the motion control module 4; the Z-axis motion module 7 can control the ultrasonic probe 2 to slide up and down along the Z-axis direction under the driving of the motion control module 4; the X-axis motion module 5, the Y-axis motion module 6 and the Z-axis motion module 7 are linear modules, the Z-axis motion module 7 comprises four Z-axis guide rails, Z-axis sliding seats arranged on the Z-axis guide rails in a sliding mode and a Z-axis transmission mechanism driving the Z-axis sliding seats to slide, the four Z-axis guide rails extend along the Z-axis direction and are matched with four corners of the frame 10 in a matrix arrangement mode, the Y-axis motion module 6 comprises two Y-axis guide rails, Y-axis sliding seats arranged on the Y-axis guide rails in a sliding mode and a Y-axis transmission mechanism driving the Y-axis sliding seats to slide, the two Y-axis guide rails extend along the Y-axis direction and are arranged oppositely in parallel, the Y-axis guide rails can be arranged between the two Z-axis sliding seats in a moving mode in the Z-axis direction, the X-axis motion module 5 comprises X-axis guide rails, X-axis sliding seats arranged on the X-axis guide rails in a sliding mode and X-axis transmission mechanisms driving the X-axis sliding seats to slide in a sliding mode, the X-axis guide rails extend along the X-axis direction and can be arranged between the two Y-axis sliding seats in a moving mode in the Y-axis direction, the ultrasonic probe is arranged on the X-axis sliding seat, and the X, Y, Z-axis transmission mechanism can be composed of a motor and a synchronous belt transmission pair or a motor and a lead screw nut pair.

The camera module 8 consists of a camera and a lens, is fixed above the inner center of the frame 10 and is vertical to the bottom surface XY plane in the frame 10; the camera module 8 is used for shooting the workpiece 1 to be measured in the frame 10 in the measuring process and sending the shot data to the computer 11 through a data line; the structured light projector 9 is fixed above the inside of the frame 10, is spaced from the camera module 8 on the same straight line by an L distance, and forms an angle theta with the Z-axis direction, wherein the specific L is 10-30cm, and the angle theta is 0-30 degrees; the structured light projector 9 is connected with the computer 11 and projects a structured light pattern to the workpiece 1 to be measured in the measuring process under the control of the computer 11; the computer 11 is used for controlling the pattern projected by the structured light projector 9 and receiving the data collected by the camera module 8, and can process, analyze and calculate the three-dimensional structural data of the workpiece 1 according to the structured light three-dimensional imaging technical principle on the data collected by the camera module 8; the computer 11 can control the three-axis movement module, so that the movement of the ultrasonic probe 2 in three directions of XYZ is realized, and the ultrasonic probe 2 can accurately scan the workpiece to be detected; the computer 11 can splice the detected workpiece 1 defect signal obtained by ultrasonic detection data analysis and the three-dimensional topography information, so as to obtain the defect information of the detected workpiece 1 in the three-dimensional structure.

In the measurement process, under the control of the computer 11, the structured light projector 9 projects four sinusoidal stripe patterns with the phase difference of pi/4 to the surface of the workpiece 1 to be measured in sequence; the camera module 8 shoots the detected workpiece 1 projected with the sine stripe pattern every time of projection, and transmits data to the computer 11; after the computer 11 acquires four pictures of the workpiece 1 to be measured, which are projected with sine stripe patterns and sent by the camera module 8, the three-dimensional shape of the workpiece 1 to be measured is calculated by utilizing the structured light three-dimensional imaging principle; the computer 11 can adaptively design a motion track of the ultrasonic probe 2 for scanning the upper surface of the workpiece 1 according to the calculated three-dimensional shape data of the workpiece 1, further send an instruction to the three-axis motion module, control the ultrasonic probe 2 to perform motion scanning on the surface of the workpiece 1, and send the scanned data to the computer 11; the computer 11 analyzes the detection data sent by the ultrasonic probe 2 to obtain a defect signal inside the detected workpiece 1, and combines the motion synchronization signal to splice the ultrasonic detection signal and the three-dimensional morphology information, so as to obtain the defect information of the detected workpiece 1 in a three-dimensional structure.

Adopt the utility model discloses a device detects time measuring to being surveyed work piece 1, fixes ultrasonic probe 2 on X axle motion module 5, and structured light projector 9 is 15 with the angle theta of Z axle direction, is 20cm with camera module 8's distance, is located same horizontal straight line. When the measurement is started, the triaxial movement module is in an initial zero state, that is, the ultrasonic probe 2 of the X-axis movement module 5 in fig. 1 is at the leftmost end, the X-axis movement module 5 is at the frontmost end, and the Y-axis movement module 6 is at the topmost end, so that the ultrasonic probe 2 does not shield the camera module 8. The computer 11 controls the structured light projector 9 to project four sinusoidal stripe patterns with phase difference pi/4, such as 901, 902, 903 and 904 in fig. 2, onto the surface of the workpiece to be measured in sequence, and the camera modules 8 collect pictures respectively and send the pictures to the computer 11; the computer 11 calculates the three-dimensional shape information of the workpiece 1 by using a structured light three-dimensional imaging principle and a preset program, adaptively edits a motion scanning route according to the preset program on the basis, and if the workpiece 1 is in a planar structure, the track is as shown in fig. 3, and if the workpiece 1 is in a curved structure, the track is as shown in fig. 4, and sends the track to the motion control module 4; after the motion control module 4 obtains the scanned path data sent by the computer 11, the X-axis motion module 5, the Y-axis motion module 6 and the Z-axis motion module 7 are driven, so that the ultrasonic probe 2 automatically completes the nondestructive inspection of the workpiece 1 to be detected; the ultrasonic probe 2 sends the detection data to the computer 11 in real time, and the computer 11 analyzes the size, structure and type information of the defect according to the detection data by using a pre-programmed program and splices the information with the three-dimensional shape data of the workpiece 1 to be detected, so that a defect imaging result under a three-dimensional condition is obtained.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A workpiece nondestructive testing device is characterized in that: the ultrasonic testing device comprises a frame, an ultrasonic probe, a three-axis motion module, a motion control module, a structured light projector, a camera module and a computer, wherein the ultrasonic probe is arranged on the three-axis motion module and used for carrying out nondestructive testing on a tested workpiece, the three-axis motion module is arranged on the frame and used for driving the ultrasonic probe to move in the direction of an X, Y, Z axis, the motion control module is connected with and controls the three-axis motion module to operate, the structured light projector and the camera module are arranged on the frame above the tested workpiece, and the computer is respectively connected with the structured light projector, the camera module, the ultrasonic probe and the motion control module.

2. The nondestructive inspection apparatus for a workpiece according to claim 1, wherein: the three-axis movement module comprises an X-axis movement module, a Y-axis movement module and a Z-axis movement module, an X-axis sliding seat capable of moving in the X-axis direction is arranged on the X-axis movement module, an ultrasonic probe is arranged on the X-axis sliding seat, the X-axis movement module is arranged on the Y-axis movement module and driven by the Y-axis movement module to move in the Y-axis direction, and the Y-axis movement module is arranged on the Z-axis movement module and driven by the Z-axis movement module to move in the Z-axis direction.

3. The nondestructive inspection apparatus for a workpiece according to claim 2, wherein: z axle motion module includes four Z axle guide rails, slides and sets up Z axle slide and the gliding Z axle drive mechanism of drive Z axle slide on the Z axle guide rail, and four Z axle guide rails extend and the matrix arrangement along Z axle direction, Y axle motion module includes two Y axle guide rails, slides and sets up Y axle slide and the gliding Y axle drive mechanism of drive Y axle slide on the Y axle guide rail, and two Y axle guide rails extend and parallel mutual disposition along Y axle direction, and the Y axle guide rail can set up between two Z axle slides with moving in Z axle direction, X axle motion module includes X axle guide rail, slides and sets up X axle slide and the gliding X axle drive mechanism of drive X axle slide on X axle guide rail, and X axle guide rail extends and can set up between two Y axle slides with moving in Y axle direction along X axle direction.

4. The nondestructive inspection apparatus for a workpiece according to claim 2, wherein: the X-axis motion module and/or the Y-axis motion module and/or the Z-axis motion module are linear modules.

5. The nondestructive inspection apparatus for a workpiece according to any one of claims 1 to 4, wherein: the frame is a rectangular frame structure.

6. The nondestructive inspection apparatus for a workpiece according to any one of claims 1 to 4, wherein: the structured light projector and the camera module are arranged at intervals in the horizontal direction.

7. The nondestructive inspection apparatus for a workpiece according to any one of claims 1 to 4, wherein: the projection angle of the structured light projector with respect to the Z-axis direction is 0-30 °.

8. The nondestructive inspection apparatus for a workpiece according to any one of claims 1 to 4, wherein: the motion control module is a PLC controller.

9. The nondestructive inspection apparatus for a workpiece according to any one of claims 1 to 4, wherein: the structured light projector and the camera module are arranged above the inner part of the frame, and a placing table for placing a workpiece to be tested is arranged below the inner part of the frame.