Novel calibration test block for ultrasonic phased array small-angle longitudinal wave probe

Abstract

The utility model relates to the field of ultrasonic detection, in particular to a novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe, which comprises a sound absorption shell, a test block body and a phased array ultrasonic probe, a mounting groove is arranged at the top of the sound absorption shell, and a first clamping groove, a second clamping groove and a third clamping groove are arranged in the mounting groove and are distributed in a step shape. The bottom of the test block body is in an inverted step shape and is clamped and installed in an installation groove in the top of the sound absorption shell, the sound absorption shell can reduce reflection echoes at the bottom of the test block body, clutter interference is avoided, and it is guaranteed that the calibration result is accurate; the first transverse through hole, the second transverse through hole and the third transverse through hole are located in the middle of the bottom of the front face of the first step, the middle of the bottom of the front face of the second step and the middle of the bottom of the front face of the third step respectively, and the three transverse through holes are separated to prevent mutual interference.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic detection, in particular to a novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe. Background Art

[0002] Currently, small-angle longitudinal wave testing is commonly used to inspect high-temperature fasteners for cracks. This testing requires a small-angle longitudinal wave probe. Before testing high-temperature fasteners, the probe's point of incidence and sensitivity must be determined. This requires the use of a comparison test block.

[0003] However, the prior art has the following defects:

[0004] However, the existing calibration test blocks are easily affected by clutter because the horizontal through holes arranged on them are close to each other, which sometimes makes it impossible to determine which is the reflected wave of the target through hole. The calibration effect is poor, which will affect the subsequent small-angle depth probe for flaw detection. Utility Model Content

[0005] The purpose of the utility model is to provide a novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a new calibration test block for an ultrasonic phased array small-angle longitudinal wave probe, comprising a sound-absorbing shell, a test block body and a phased array ultrasonic probe, wherein the sound-absorbing shell is sleeved on the outside of the bottom of the test block body, scale lines are engraved on both sides of the top of the test block body, the bottom of the test block body is in an inverted step shape, and the bottom of the test block body is provided with a first step, a second step and a third step from right to left in sequence, and a first transverse through hole, a second transverse through hole and a third transverse through hole are respectively provided in the middle of the front bottom of the first step, the middle of the front bottom of the second step and the middle of the front bottom of the third step.

[0007] The above technical solution is adopted. In this solution, the first transverse through hole, the second transverse through hole and the third transverse through hole are at different distances from the top of the test block body, which facilitates the calibration of the probe. The bottom of the test block body is in an inverted step shape, which can save costs. The sound-absorbing shell reduces the reflected echo from the bottom of the test block body, avoids clutter interference, and improves calibration accuracy.

[0008] The height of the third step is greater than that of the second step, the height of the second step is greater than that of the first step, and the widths of the first step, the second step and the third step are the same and equal to the width of the test block body.

[0009] The above technical solution is adopted, in which the heights of the first step, the second step and the third step increase gradually and the lengths of the three steps are the same.

[0010] Three identification plates are provided on one side of the scale line in sequence, and the four corners of the identification plates are welded to the top of the test block body. The three identification plates are flush with the first transverse through hole, the second transverse through hole and the third transverse through hole in the vertical direction respectively. The material of the test block body and the roughness of the upper and lower surfaces are consistent with those of the workpiece to be tested.

[0011] By adopting the above technical solution, the position information of the first transverse through hole, the second transverse through hole and the third transverse through hole are recorded on the three identification plates respectively, and are located at the top of the three transverse through holes for easy correspondence.

[0012] A mounting slot is provided on the top of the sound-absorbing shell. The mounting slot is divided into a first slot, a second slot and a third slot from left to right. The first step, the second step and the third step are respectively engaged and installed in the first slot, the second slot and the third slot.

[0013] By adopting the above technical solution, the depths of the first slot, the second slot and the third slot are gradually increased, which facilitates the engagement and connection between the test block body and the sound-absorbing shell, ensuring a tight connection and preventing it from falling off.

[0014] The middle of the top of both sides of the sound absorbing shell is provided with a stepped groove, the width of the two stepped grooves plus the width of the mounting groove is equal to the width of the sound absorbing shell, and the middle of the top of both sides of the sound absorbing shell is provided with a groove.

[0015] With the above technical solution, the bottoms of the grooves on the front and back sides of the sound-absorbing shell are located below the three transverse through holes, so that both ends of the transverse through holes are exposed.

[0016] The inner walls of the mounting grooves are each provided with a sawtooth groove, the bottom of the phased array ultrasonic probe is fitted with the top of the test block body, and the phased array ultrasonic probe slides on the top of the test block body.

[0017] The above technical solution is adopted, in which the sawtooth groove is a silencer groove, which can reduce the reflected echo from the bottom of the test block body, and the phased array probe moves on the top of the test block body to facilitate detection and calibration.

[0018] The first transverse through hole, the second transverse through hole and the third transverse through hole all pass through the test block body, and the diameters of the first transverse through hole, the second transverse through hole and the third transverse through hole are all greater than two millimeters. The acoustic impedance of the sound-absorbing shell material is the same as the acoustic impedance of the test block body.

[0019] By adopting the above technical solution, the parameters and materials of the test block body are the same as those of the workpiece to be tested, ensuring the accuracy of the calibration results and the detection results of the probe.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The test block body of the utility model is stepped, and the three transverse through holes are respectively located on the steps and are far apart to avoid mutual interference. The bottom of the test block body is provided with a sound-absorbing shell, and the inner wall of the sound-absorbing shell is provided with a silencer groove, which can reduce the reflected echo at the bottom of the test block body, prevent clutter interference, and ensure efficient and accurate calibration of the phased array. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the test block body structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the overall structure of the sound-absorbing shell of the utility model;

[0026] Figure 5 This is a front cross-sectional structural diagram of the sound-absorbing shell of the present utility model.

[0027] In the figure: 1. Sound-absorbing shell; 2. Groove; 3. Test block body; 4. Scale line; 5. Identification plate; 6. First transverse through hole; 7. Second transverse through hole; 8. Third transverse through hole; 9. Phased array ultrasonic probe; 10. First step; 11. Second step; 12. Third step; 13. Mounting slot; 14. Stepped slot; 15. First card slot; 16. Second card slot; 17. Third card slot; 18. Sawtooth groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-5The utility model provides a new calibration test block for an ultrasonic phased array small-angle longitudinal wave probe, comprising a sound-absorbing shell 1, a test block body 3 and a phased array ultrasonic probe 9. The sound-absorbing shell 1 is sleeved on the outside of the bottom of the test block body 3. Scale lines 4 are engraved on both sides of the top of the test block body 3. The bottom of the test block body 3 is in an inverted step shape. The bottom of the test block body 3 is provided with a first step 10, a second step 11 and a third step 12 from right to left. A first transverse through hole 6, a second transverse through hole 7 and a third transverse through hole 8 are respectively provided in the middle of the front bottom of the first step 10, the middle of the front bottom of the second step 11 and the middle of the front bottom of the third step 12. The scale lines 4 facilitate measuring the position of the phased array ultrasonic probe 9.

[0030] The height of the third step 12 is greater than the height of the second step 11, the height of the second step 11 is greater than the height of the first step 10, the width of the first step 10, the width of the second step 11 and the width of the third step 12 are the same and equal to the width of the test block body 3, and the first step 10, the second step 11 and the third step 12 separate the first transverse through hole 6, the second transverse through hole 7 and the third transverse through hole 8.

[0031] Three identification plates 5 are provided on one side of the scale line 4 in sequence. The four corners of the identification plates 5 are welded to the top of the test block body 3. The three identification plates 5 are flush with the first transverse through hole 6, the second transverse through hole 7 and the third transverse through hole 8 in the vertical direction respectively. The material of the test block body 3 and the roughness of the upper and lower surfaces are consistent with those of the workpiece to be tested. The identification plates 5 are fixedly connected to the top of the test block body 3 through the four corners.

[0032] A mounting groove 13 is provided on the top of the sound-absorbing shell 1. The mounting groove 13 is divided into a first slot 15, a second slot 16 and a third slot 17 from left to right. The first step 10, the second step 11 and the third step 12 are respectively mounted in the first slot 15, the second slot 16 and the third slot 17. The first slot 15, the second slot 16 and the third slot 17 have different depths. The bottom of the test block body 3 is mounted in the mounting groove 13.

[0033] A stepped groove 14 is provided in the middle of the top of both sides of the sound-absorbing shell 1. The width of the two stepped grooves 14 plus the width of the mounting groove 13 is equal to the width of the sound-absorbing shell 1. A groove 2 is provided in the middle of the top of both sides of the sound-absorbing shell 1. The stepped groove 14 facilitates exposing the two ends of the first transverse through hole 6, the two ends of the second transverse through hole 7 and the two ends of the third transverse through hole 8.

[0034] The inner wall of the mounting groove 13 is provided with a serrated groove 18 , and the bottom of the phased array ultrasonic probe 9 fits against the top of the test block body 3 and the phased array ultrasonic probe 9 slides on the top of the test block body 3 , and the serrated groove 18 can play a role in noise reduction.

[0035] The first transverse through hole 6, the second transverse through hole 7 and the third transverse through hole 8 all pass through the test block body 3, and the diameters of the first transverse through hole 6, the second transverse through hole 7 and the third transverse through hole 8 are all greater than two millimeters. The acoustic impedance of the material of the sound-absorbing shell 1 is the same as the acoustic impedance of the test block body 3. The material and performance of the test block body 3 are the same as those of the workpiece to be tested, which can ensure the detection effect of the phased array ultrasonic probe 9.

[0036] Working principle: When the present invention is used, the bottom of the test block body 3 is first snap-fitted into the mounting groove 13 on the top of the sound-absorbing shell 1, so that the first step 10, the second step 11 and the third step 12 are snap-fitted into the first slot 15, the second slot 16 and the third slot 17 respectively, which is convenient for placing the test block body 3. Then the bottom of the phased array ultrasonic probe 9 is attached to the top of the test block body 3 and slid for detection and calibration. The scale line 4 and the identification plate 5 are convenient for determining the position and recording data, which is convenient for calibration. The first transverse through hole 6, the second transverse through hole 7 and the third transverse through hole 8 are separated by the first step 10, the second step 11 and the third step 12 to avoid mutual interference, so that the calibration result is accurate.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe, comprising a sound-absorbing shell (1), a test block body (3) and a phased array ultrasonic probe (9), characterized in that: The sound-absorbing shell (1) is sleeved on the outer side of the bottom of the test block body (3); scale lines (4) are engraved on both sides of the top of the test block body (3); the bottom of the test block body (3) is in an inverted step shape; the bottom of the test block body (3) is provided with a first step (10), a second step (11) and a third step (12) in sequence from right to left; a first transverse through hole (6), a second transverse through hole (7) and a third transverse through hole (8) are respectively provided in the middle of the front bottom of the first step (10), the middle of the front bottom of the second step (11) and the middle of the front bottom of the third step (12).

2. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 1, characterized in that: The height of the third step (12) is greater than the height of the second step (11), the height of the second step (11) is greater than the height of the first step (10), and the widths of the first step (10), the second step (11) and the third step (12) are the same and equal to the width of the test block body (3).

3. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 1, characterized in that: Three identification plates (5) are sequentially provided on one side of the scale line (4), and the four corners of the identification plates (5) are welded to the top of the test block body (3). The three identification plates (5) are respectively flush with the first transverse through hole (6), the second transverse through hole (7), and the third transverse through hole (8) in the vertical direction. The material and the roughness of the upper and lower surfaces of the test block body (3) are consistent with those of the workpiece to be tested.

4. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 1, characterized in that: The top of the sound-absorbing shell (1) is provided with a mounting slot (13), which is divided into a first slot (15), a second slot (16) and a third slot (17) from left to right, and the first step (10), the second step (11) and the third step (12) are respectively engaged and mounted inside the first slot (15), the second slot (16) and the third slot (17).

5. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 1, characterized in that: The middle of the top of both the front and back sides of the sound absorbing shell (1) is provided with a stepped groove (14); the width of the two stepped grooves (14) plus the width of the mounting groove (13) is equal to the width of the sound absorbing shell (1); and the middle of the top of both sides of the sound absorbing shell (1) is provided with a groove (2).

6. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 4, characterized in that: The inner wall of the mounting groove (13) is provided with a sawtooth groove (18), the bottom of the phased array ultrasonic probe (9) is fitted with the top of the test block body (3), and the phased array ultrasonic probe (9) slides on the top of the test block body (3).

7. The novel calibration test block for an ultrasonic phased array small-angle longitudinal wave probe according to claim 1, characterized in that: The first transverse through hole (6), the second transverse through hole (7) and the third transverse through hole (8) all pass through the test block body (3), and the diameters of the first transverse through hole (6), the second transverse through hole (7) and the third transverse through hole (8) are all greater than two millimeters. The acoustic impedance of the material of the sound-absorbing shell (1) is the same as the acoustic impedance of the test block body (3).

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