Automatic positioning scanning device based on digital flaw detector

Abstract

This utility model discloses an automatic positioning and scanning device based on a digital flaw detector, specifically relating to the field of scanning equipment technology. It includes a vehicle body, a controller mounted on the top surface of the vehicle body, and two TOFD detection probes. Rotary shafts are rotatably connected to both sides of the vehicle body, and a first bevel gear is fixedly mounted on the outer surface of one of the shafts. In practical operation, the automatic positioning and scanning device based on a digital flaw detector uses a first motor to drive a second bevel gear to rotate, causing two magnetic wheels to rotate, enabling the vehicle body to move on the metal surface to be inspected. A fourth motor drives a movable frame to rotate, and a second motor drives a rotating rod to rotate, allowing adjustment of the angles of the two TOFD detection probes. This reduces labor costs during the inspection process and is suitable for large-scale batch inspection tasks. By scanning at a uniform speed, it effectively avoids the influence of human factors such as unstable scanning speed and path deviation on the inspection results, improving inspection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of scanning equipment technology, and in particular to an automatic positioning scanning device based on a digital flaw detector. Background Technology

[0002] TOFD, or Time-of-Flight Diffraction, is a non-destructive testing method based on diffraction signals. The principle is that when an ultrasonic wave acts on a long crack defect, diffraction occurs in the crack's gap, and reflection also occurs on the crack surface. Two broadband, narrow-pulse detection probes, one transmitting and one receiving, are used for detection. These probes are symmetrically arranged relative to the crack's centerline. The diffracted waves generated by the sound beam at the two ends or corners of the crack are used to detect, quantify, and locate material defects. It has the advantages of high detection sensitivity and fast scanning speed, and has an extremely high detection rate for planar defects such as cracks and lack of fusion. It provides timely imaging and has no radiation pollution.

[0003] Currently, scanning equipment is often used manually by hand to scan objects. This leads to a significant increase in labor costs when dealing with large-scale batch inspection tasks. Furthermore, during manual scanning, human factors such as unstable scanning speed and path deviation can easily affect the inspection results. Therefore, in order to solve the above defects, the inventors propose an automatic positioning scanning device based on a digital flaw detector. Utility Model Content

[0004] The main purpose of this invention is to provide an automatic positioning and scanning device based on a digital flaw detector, which can effectively solve the problem that the detection results of existing scanning equipment are easily affected by human factors such as unstable scanning speed and path deviation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The automatic positioning and scanning device based on a digital flaw detector includes a vehicle body, a controller mounted on the top surface of the vehicle body, and two TOFD detection probes. The vehicle body has rotating shafts rotatably connected to both sides inside, and a first bevel gear is fixedly mounted on the outer surface of one of the rotating shafts. Both ends of the two rotating shafts extend to the outside of the vehicle body and are fixedly mounted with magnetic wheels. A first motor is fixedly mounted on the top surface of the vehicle body, and the output shaft of the first motor extends into the inside of the vehicle body and is fixedly mounted with a second bevel gear. The second bevel gear meshes with the first bevel gear.

[0007] Preferably, a crawler frame is fixedly installed on one side of the top surface of the vehicle body, a scanning frame is fixedly installed on the top surface of the crawler frame, and two handles are fixedly installed on the top surface of the crawler frame.

[0008] Preferably, a threaded rod is rotatably connected to one side of the scanning frame, and a slide rod is fixedly installed on the other side of the scanning frame. A support block is threadedly connected to the outer surface of the threaded rod, and the support block is slidably connected to the slide rod. A third motor is fixedly installed on one side of the outer surface of the scanning frame, and the output shaft of the third motor extends into the inside of the scanning frame and is fixedly connected to the threaded rod.

[0009] Preferably, a movable block is slidably connected inside the vehicle body, and four fixed rods are fixedly connected to the bottom surface of the support block and the top surface of the movable block. A connector is fixedly installed on the top surface of the support block.

[0010] Preferably, a fourth motor is fixedly installed on the top surface of the movable block, a movable frame is rotatably connected to the bottom surface of the movable block, and the output shaft of the fourth motor extends to the bottom surface of the movable block and is fixedly connected to the movable frame. A rotating rod is rotatably connected inside the movable frame, and two connecting sleeves are fixedly installed on the outer surface of the rotating rod. The two connecting sleeves are respectively fixedly connected to two TOFD detection probes.

[0011] Preferably, a second motor is fixedly installed on one side of the outer surface of the movable frame, and the output shaft of the second motor extends into the interior of the movable frame and is fixedly connected to the rotating rod.

[0012] Preferably, a brush plate is slidably connected to the outer bottom surface of the vehicle body, and an electric actuator is fixedly installed on the top surface of the vehicle body, with the output end of the electric actuator passing through the vehicle body and fixedly connected to the top surface of the brush plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model discloses an automatic positioning and scanning device based on a digital flaw detector. By setting up a vehicle body, in actual operation, a first motor drives a second bevel gear to rotate, which in turn drives the first bevel gear and the rotating shaft to rotate, thereby causing two magnetic wheels to rotate. This allows the vehicle body to move on the metal surface to be inspected. A third motor drives a threaded rod to adjust the position of the two TOFD detection probes. A fourth motor drives a movable frame to rotate, and a second motor drives a rotating rod to rotate, thereby adjusting the angle of the two TOFD detection probes. This reduces labor costs during the inspection process and is suitable for large-scale batch inspection tasks. Through uniform scanning, it effectively avoids the influence of human factors such as unstable scanning speed and path deviation on the inspection results, improving inspection accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the vehicle body structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the scanning frame of this utility model;

[0018] Figure 4 This is a schematic diagram of the vehicle body structure from below according to this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged view of section A in the middle;

[0020] Figure 6 This is a top view schematic diagram of the vehicle body structure of this utility model.

[0021] In the diagram: 1. Magnetic wheel; 2. First motor; 3. Crawling frame; 4. Scanning frame; 5. TOFD detection probe; 6. Connector; 7. Handle; 8. Controller; 9. Vehicle body; 101. Rotating shaft; 102. First bevel gear; 103. Second bevel gear; 901. Electric actuator; 902. Brush plate; 501. Movable frame; 502. Rotating rod; 503. Second motor; 504. Connecting sleeve; 401. Slide rod; 402. Threaded rod; 403. Support block; 404. Third motor; 405. Moving block; 406. Fourth motor; 407. Fixed rod. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] This utility model discloses an automatic positioning and scanning device based on a digital flaw detector, such as... Figure 1-6 As shown, the device includes a vehicle body 9, a controller 8 mounted on the top surface of the vehicle body 9, and two TOFD detection probes 5. The two TOFD detection probes 5 are responsible for transmitting and receiving functions respectively. They work together through synchronous triggering. The transmitting probe is excited by the control system to generate a high-frequency pulse signal, which is converted into ultrasonic waves by the probe chip and emitted into the inside of the workpiece being inspected. When the ultrasonic waves propagate in the workpiece, diffraction occurs when they encounter the endpoint of the defect. The task of the transmitting probe is to provide the initial sound source.

[0024] The receiving probe is used to capture ultrasonic signals propagating through the workpiece, including direct waves, bottom surface reflected waves, and diffracted waves at the defect endpoints. The receiving probe converts the received ultrasonic signals into electrical signals and transmits them to the data acquisition system for analysis.

[0025] Both sides of the interior of the vehicle body 9 are rotatably connected to a rotating shaft 101, and a first bevel gear 102 is fixedly installed on the outer surface of one of the rotating shafts 101. Both ends of the two rotating shafts 101 extend to the outside of the vehicle body 9 and are fixedly installed with magnetic wheels 1. All four magnetic wheels 1 are made of high-strength magnets to ensure firm adsorption on the metal surface.

[0026] A first motor 2 is fixedly installed on the top surface of the vehicle body 9, and the output shaft of the first motor 2 extends into the interior of the vehicle body 9 and is fixedly installed with a second bevel gear 103. The second bevel gear 103 meshes with the first bevel gear 102. The first motor 2 drives the second bevel gear 103 to rotate, which in turn drives the first bevel gear 102 and one of the rotating shafts 101 to rotate, thereby causing the two magnetic wheels 1 to rotate, which in turn allows the vehicle body 9 to move on the metal surface, thereby driving the two TOFD detection probes 5 to move.

[0027] By adjusting the rotation direction of the output shaft of the first motor 2 through the controller 8, the forward and backward functions can be realized. The first motor 2 receives PWM or CAN bus commands from the controller 8 through the driver to achieve precise speed regulation and start / stop control.

[0028] The controller 8 achieves automated control of the vehicle body 9 moving at a constant speed and the dual probes working together through hardware integration, such as the main control chip, sensors, drive modules and software algorithms such as PID control, synchronous triggering and abnormal handling.

[0029] A crawler frame 3 is fixedly installed on one side of the top surface of the vehicle body 9. A scanning frame 4 is fixedly installed on the top surface of the crawler frame 3. Two handles 7 are fixedly installed on the top surface of the crawler frame 3.

[0030] A threaded rod 402 is rotatably connected to one side of the inside of the scanning frame 4, and a slide rod 401 is fixedly installed on the other side of the inside of the scanning frame 4. A support block 403 is threadedly connected to the outer surface of the threaded rod 402, and the support block 403 is slidably connected to the slide rod 401. A third motor 404 is fixedly installed on one side of the outer surface of the scanning frame 4, and the output shaft of the third motor 404 extends into the inside of the scanning frame 4 and is fixedly connected to the threaded rod 402. The third motor 404 drives the threaded rod 402 to rotate, which allows the support block 403 to move along the slide rod 401.

[0031] The vehicle body 9 has a sliding connection to a movable block 405 inside, and the bottom surface of the support block 403 and the top surface of the movable block 405 are fixedly connected to four fixed rods 407. When the support block 403 moves, it will drive the movable block 405 to move.

[0032] A connector 6 is fixedly installed on the top surface of the support block 403. The connector 6 is a "bridge" between the two TOFD detection probes 5, and mainly undertakes two functions: mechanical fixation and signal and energy transmission, to ensure that the two probes work together.

[0033] High-frequency cables are laid inside connector 6 to transmit the trigger signal of the transmitting probe to the probe chip, and at the same time, the electrical signal received by the receiving probe is transmitted back to the data acquisition card in real time. Connector 6 realizes the trigger synchronization of the two probes through the synchronization line, reducing the measurement error caused by signal delay.

[0034] A fourth motor 406 is fixedly installed on the top surface of the movable block 405, and a movable frame 501 is rotatably connected to the bottom surface of the movable block 405. The output shaft of the fourth motor 406 extends to the bottom surface of the movable block 405 and is fixedly connected to the movable frame 501. The fourth motor 406 can drive the movable frame 501 to rotate laterally.

[0035] The movable frame 501 is rotatably connected to a rotating rod 502, and two connecting sleeves 504 are fixedly installed on the outer surface of the rotating rod 502. The two connecting sleeves 504 are fixedly connected to two TOFD detection probes 5 respectively. A second motor 503 is fixedly installed on one side of the outer surface of the movable frame 501, and the output shaft of the second motor 503 extends into the interior of the movable frame 501 and is fixedly connected to the rotating rod 502. The second motor 503 can drive the rotating rod 502 to rotate longitudinally. In turn, by rotating the transverse rotating box longitudinally, the angle of the two TOFD detection probes 5 can be adjusted. In conjunction with the movement of the vehicle body 9 and the rotation of the threaded rod 402, the position of the two TOFD detection probes 5 can be adjusted.

[0036] A brush plate 902 is slidably connected to the bottom surface of the vehicle body 9, and an electric push rod 901 is fixedly installed on the top surface of the vehicle body 9. The output end of the electric push rod 901 passes through the vehicle body 9 and is fixedly connected to the top surface of the brush plate 902. The electric push rod 901 can push the brush plate 902 to rise and fall. When the electric push rod 901 pushes the brush plate 902 down to contact the metal surface, the brush plate 902 can wipe and clean the metal surface as the vehicle body 9 moves, so as to avoid the dust on the metal surface from affecting the detection effect.

[0037] The working principle of this utility model is as follows: the operator manually squeezes the coupling agent bottle to evenly apply a thin and continuous coupling layer to the probe and the workpiece surface. Then, the four magnetic wheels 1 of the vehicle body 9 are adsorbed onto the metal surface to be tested. The position of the TOFD detection probe 5 on the scanning frame 4 is adjusted. The moving speed and direction of the vehicle body 9 are set by the controller 8. The first motor 2 is started to make two of the magnetic wheels 1 rotate. The vehicle body 9 moves and the TOFD detection probe 5 remains stable on the scanning frame 4. The detection data is collected in real time, analyzed and recorded. During the detection process, the coupling agent needs to be manually applied in real time.

[0038] All of the above-mentioned components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can control computers and other devices.

[0040] Commonly known equipment and existing publicly available power connection technologies will not be described in detail here.

[0041] The specific models and specifications of the four motors, electric actuators 901, controllers 8, and TOFD detection probes 5 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method, wiring connection method, and control method all adopt existing technologies in the field, and the power supply is also common knowledge in the field, so it will not be described in detail.

[0042] The control method of this utility model is automatic control through controller 8. The control circuit of controller 8 can be implemented by simple programming by those skilled in the art, and the power supply is also common knowledge in the art.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic positioning scanning device based on a digital flaw detector, comprising a vehicle body (9), a controller (8) mounted on the top surface of the vehicle body (9), and two TOFD detection probes (5), characterized in that: The vehicle body (9) has rotating shafts (101) rotatably connected to both sides inside. A first bevel gear (102) is fixedly installed on the outer surface of one of the shafts (101). Both ends of the two shafts (101) extend to the outside of the vehicle body (9) and are fixedly installed with magnetic wheels (1). A first motor (2) is fixedly installed on the top surface of the vehicle body (9). The output shaft of the first motor (2) extends into the inside of the vehicle body (9) and is fixedly installed with a second bevel gear (103). The second bevel gear (103) meshes with the first bevel gear (102).

2. The automatic positioning scanning apparatus based on digital flaw detector according to claim 1, characterized in that: A crawler frame (3) is fixedly installed on one side of the top surface of the vehicle body (9), a scanning frame (4) is fixedly installed on the top surface of the crawler frame (3), and two handles (7) are fixedly installed on the top surface of the crawler frame (3).

3. The automatic positioning scanning apparatus based on digital flaw detector according to claim 2, characterized in that: A threaded rod (402) is rotatably connected to one side of the inside of the scanning frame (4), and a slide rod (401) is fixedly installed on the other side of the inside of the scanning frame (4). A support block (403) is threadedly connected to the outer surface of the threaded rod (402), and the support block (403) is slidably connected to the slide rod (401). A third motor (404) is fixedly installed on one side of the outer surface of the scanning frame (4), and the output shaft of the third motor (404) extends into the inside of the scanning frame (4) and is fixedly connected to the threaded rod (402).

4. The automatic positioning scanning apparatus based on digital flaw detector according to claim 1, characterized in that: The vehicle body (9) has a sliding connection to a moving block (405), and the bottom surface of the support block (403) and the top surface of the moving block (405) are fixedly connected to four fixing rods (407). A connector (6) is fixedly installed on the top surface of the support block (403).

5. The automatic positioning and scanning device based on a digital flaw detector according to claim 4, characterized in that: A fourth motor (406) is fixedly installed on the top surface of the movable block (405), and a movable frame (501) is rotatably connected to the bottom surface of the movable block (405). The output shaft of the fourth motor (406) extends to the bottom surface of the movable block (405) and is fixedly connected to the movable frame (501). A rotating rod (502) is rotatably connected inside the movable frame (501), and two connecting sleeves (504) are fixedly installed on the outer surface of the rotating rod (502). The two connecting sleeves (504) are respectively fixedly connected to two TOFD detection probes (5).

6. The automatic positioning and scanning device based on a digital flaw detector according to claim 5, characterized in that: A second motor (503) is fixedly installed on one side of the outer surface of the movable frame (501), and the output shaft of the second motor (503) extends into the interior of the movable frame (501) and is fixedly connected to the rotating rod (502).

7. The automatic positioning and scanning device based on a digital flaw detector according to claim 1, characterized in that: A brush plate (902) is slidably connected to the bottom surface of the vehicle body (9), and an electric push rod (901) is fixedly installed on the top surface of the vehicle body (9). The output end of the electric push rod (901) passes through the vehicle body (9) and is fixedly connected to the top surface of the brush plate (902).

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