A high-integration test block for detecting the performance of an ultrasonic probe

Abstract

The present invention provides a highly integrated ultrasonic probe performance detection test block, which includes a first sector body, a second sector body, and a third sector body that are successively connected into one body and have different radii and are in the shape of semi-cylinders. The radius of the semi-cylinder of the second sector body is smaller than the radius of the semi-cylinder of the first sector body, and the radius of the semi-cylinder of the first sector body is smaller than the radius of the semi-cylinder of the third sector body. Since the first sector body, the second sector body, and the third sector body are set as semi-cylindrical sector bodies in the present invention, the determination of the acoustic axis deflection angle of a longitudinal wave straight probe, a transverse wave inclined probe, and a longitudinal wave small-angle probe can be quickly carried out. Since there are engraved lines on the plane and the end surface, and the radii of the first sector body and the third sector body are about twice the radius of the second sector body, the determination of the incident point and the front length of a concave and plane inclined probe can be quickly carried out. The pulse width, relative pulse echo sensitivity, center frequency, and relative bandwidth of the probe can be detected by using the arc.

Description

Technical Field

[0001] The present invention relates to a nondestructive testing tool for locomotive and rolling stock parts, in particular to a highly integrated ultrasonic probe performance testing block, belonging to the field of nondestructive testing technology. Background Art

[0002] At home and abroad, standard blocks such as IIW1, IIW2, CSK-ⅠA, DB-H1, DB-H2, etc. are usually used to test the performance of conventional shear wave probes and longitudinal wave probes. The test contents include indexes such as incident point, front length, and acoustic axis deviation angle. However, performances such as pulse width, relative pulse echo sensitivity, center frequency, and relative bandwidth need to be detected by using special blocks. For the performance test of special probes such as concave angle probes, there is no more suitable standard block.

[0003] For the detection of the acoustic axis deviation angle of longitudinal wave straight probes, transverse holes are usually selected as reflectors, and the test of other performances needs to rely on other reflectors. Therefore, multiple blocks are required to evaluate their comprehensive performance, resulting in a relatively high test cost and low efficiency. There is no highly integrated portable block for testing the main performance indexes of probes at home and abroad. Summary of the Invention

[0004] In view of the above-mentioned technical problems, the present invention provides a highly integrated ultrasonic probe performance testing block, which can quickly and accurately test the pulse width, relative pulse echo sensitivity, center frequency, and relative bandwidth of various types of probes, as well as the performances of the incident point and front length of concave angle probes and plane angle probes, and the acoustic axis deviation angle of longitudinal wave straight probes, transverse wave angle probes, and longitudinal wave small angle probes through the structural improvement of the testing block.

[0005] The technical solution for the present invention to solve the above technical problems is: providing a highly integrated ultrasonic probe performance testing block, including first, second, and third semi-cylindrical sectors that are connected in sequence and have different radii;

[0006] The centers of the first, second, and third sectors are on the same straight line;

[0007] The radius of the semi-cylinder of the second sector is smaller than the radius of the semi-cylinder of the first sector, and the radius of the semi-cylinder of the first sector is smaller than the radius of the semi-cylinder of the third sector; the radius of the semi-cylinder of the first sector is slightly smaller than the radius of the semi-cylinder of the third sector, and the radius of the semi-cylinder of the third sector is 2 ± 0.5 times the radius of the semi-cylinder of the second sector;

[0008] Both the first and second sectors have a convex circular arc surface and a plane on the side vertical surface opposite to the circular arc surface; the side vertical surface of the third sector opposite to the circular arc surface is a plane.

[0009] A further limited technical solution of the present invention is the high-integration detection test block for the performance of the ultrasonic probe. On the side vertical surface of the first fan-shaped body, a first plane, a first convex circular arc surface, a second plane, and a second convex circular arc surface are sequentially arranged; the top end of the first fan-shaped body has a first end surface.

[0010] For the high-integration detection test block for the performance of the ultrasonic probe described above, on the side vertical surface of the second fan-shaped body, a third convex circular arc surface, a third plane, and a fourth plane are sequentially arranged. The side vertical surface of the third fan-shaped body is a fifth plane, and the top end of the third fan-shaped body is a second end surface.

[0011] For the high-integration detection test block for the performance of the ultrasonic probe described above, the circular arc radii of the first convex circular arc surface, the second convex circular arc surface, and the third convex circular arc surface are equal; the centers of the circular arcs of the first convex circular arc surface, the second convex circular arc surface, and the third convex circular arc surface are on the same axis.

[0012] For the high-integration detection test block for the performance of the ultrasonic probe described above, a first end surface scale line is provided on the first end surface of the first fan-shaped body; a second end surface scale line is at the center of the second end surface of the third fan-shaped body.

[0013] For the high-integration detection test block for the performance of the ultrasonic probe described above, a first plane scale line and a second plane scale line are respectively on the axes of the first plane and the second plane of the first fan-shaped body, a third plane scale line and a fourth plane scale line are respectively on the axes of the third plane and the fourth plane of the second fan-shaped body, and a fifth plane scale line is provided on the axis of the fifth plane of the third fan-shaped body.

[0014] Furthermore, for the high-integration detection test block for the performance of the ultrasonic probe described above, the lengths of the first end surface scale line and the second end surface scale line are both 5 mm, and the depths of the scale lines are both 0.3 mm. The depths of the first plane scale line, the second plane scale line, the third plane scale line, the fourth plane scale line, and the fifth plane scale line are 0.1 mm to 0.15 mm, and the first end surface scale line is connected to the first plane scale line, and the second end surface scale line is connected to the fourth plane scale line and the fifth plane scale line.

[0015] The beneficial effects of the present invention are as follows: Since the first fan-shaped body, the second fan-shaped body, and the third fan-shaped body are set as semi-cylindrical fan-shaped bodies, the acoustic axis deflection angles of the longitudinal wave straight probe, the transverse wave oblique probe, and the longitudinal wave small-angle probe can be measured quickly. Since there are scale lines on the planes and end surfaces, and the radii of the first fan-shaped body and the third fan-shaped body are about twice the radius of the second fan-shaped body, the incident points and front lengths of the concave and plane oblique probes can be measured quickly. The circular arcs can be used to detect the pulse width, relative pulse echo sensitivity, center frequency, and relative bandwidth of the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following embodiments given in conjunction with the drawings further illustrate the present invention in detail.

[0017] Figure 1 Structural schematic diagram of the test block of the present invention

[0018] Figure 2 is Figure 1 the top view of;

[0019] Figure 3 is Figure 1 the front view of;

[0020] Figure 4 is Figure 1 the rear view of;

[0021] Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 Schematic diagram of the state when measuring the refraction angle of the concave surface oblique probe of the present invention;

[0022] Figure 9 、 Figure 10 Schematic diagram of the state when measuring the refraction angle of the plane oblique probe of the present invention;

[0023] Figure 11 Schematic diagram of the state when measuring the acoustic axis deviation angle of the longitudinal wave straight probe of the present invention;

[0024] Figure 12 Schematic diagram of the state when measuring the acoustic axis deviation angles of the transverse wave oblique probe and the longitudinal wave small angle oblique probe of the present invention. Specific implementation manner

[0025] This solution provides a high-integration detection test block for ultrasonic probe performance, and the structure is as Figures 1-4As shown in the figure, it includes a semi-cylindrical first fan body, a semi-circular second fan body, and a semi-circular third fan body that are integrally connected. The first fan body, the second fan body, and the third fan body are concentrically connected, and the sum of the lengths of the three fan bodies is 210 mm. On the side elevation of the first fan body 1, there are successively a first plane 1-1, a first convex arc surface 1-2, a second plane 1-3, and a second convex arc surface 1-4; the top end of the first fan body 1 has a first end face 1-5. On the side elevation of the second fan body 2, there are successively a third convex arc surface 2-1, a third plane 2-2, and a fourth plane 2-3. The side elevation of the third fan body 3 is a fifth plane 3-1, and the top end of the third fan body 3 is a second end face 3-2. There is a first end face scale line 4-1 on the first end face 1-5 of the first fan body 1; there is a second end face scale line 4-2 at the center of the second end face 3-2 of the third fan body 3. There are a first plane scale line 5-1 and a second plane scale line 5-2 on the axes of the first plane 1-1 and the second plane 1-3 of the first fan body 1 respectively, there are a third plane scale line 5-3 and a fourth plane scale line 5-4 on the axes of the third plane 2-2 and the fourth plane 2-3 of the second fan body 2 respectively, and there is a fifth plane scale line 5-5 on the axis of the fifth plane 3-1 of the third fan body 3. The scale line depths of the first plane scale line 5-1, the second plane scale line 5-2, the third plane scale line 5-3, the fourth plane scale line 5-4, and the fifth plane scale line 5-5 are 0.1 mm to 0.15 mm, and the first end face scale line 4-1 is connected to the first plane scale line 5-1, and the second end face scale line 4-2 is connected to the fourth plane scale line 5-4 and the fifth plane scale line 5-5.

[0026] The semi-circle radii where the first plane 1-1 and the second plane 1-3 of the first fan body 1 are located are R1 = R3 = 65 mm, the semi-circle radii where the first convex arc surface 1-2 and the second convex arc surface 1-4 are located are R2 = R4 = 66 mm, and the arc radius of the convex arc surface is 87 mm; the semi-circle radius where the third convex arc surface 2-1 of the second fan body 2 is located is R5 = 33 mm, and the arc radius of this arc is 87 mm. The semi-circle radii where the third plane 2-2 and the fourth plane 2-3 of the second fan body are located are R6 = 32 mm and R7 = 33 mm respectively, and the semi-circle radius of the third fan body 3 is R8 = 66 mm. The length of the first fan body 1 is 60 mm. The third convex arc surface 2-1 of the second fan body is connected to the second convex arc surface 1-4 of the first fan body and they are co-circular. The distance from the connection of the two planes of the third plane 2-2 and the fourth plane 2-3 to the first end face 1-5 of the first fan body 1 is 85 mm. The length of the third fan body is 80 mm. There is a first end face scale line 4-1 on the first end face 1-5 of the first fan body, and there is a second end face scale line 4-2 at the center of the second end face 3-2 of the third fan body. The scale line lengths are both 5 mm, and the depths are both 0.3 mm.

[0027] Example 1:

[0028] Measurement of the incident point and front length of a concave surface oblique probe, asFigures 5 to 8 As shown in the figure, during the test, place the concave inclined probe on the first convex circular arc surface 1-2 of the first sector 1, and move the probe back and forth to make the reflected echo of the arc with R2 = 66 mm reach the highest. The intersection position of the first end face scale line 4-1 or the first plane scale line 5-1 of the first end face 1-5 of the first sector 1 and the longitudinal projection of the probe is the incident point of the sound beam.

[0029] As Figure 7 shown in the figure, measure the distance L1 from the front edge of the probe to the outer cylinder of the first sector 1 with a scale, and calculate the front edge distance of the probe according to the following formula:

[0030] .

[0031] As Figure 5 , Figure 6 , Figure 8 shown in the figure, during the test, the concave inclined probe can also be placed on the second convex circular arc surface 1-4 of the first sector 1. At this time, the probe is also located on the third convex circular arc surface 2-1 of the second sector 2. Move the probe back and forth to make the reflected echoes of the arcs with R4 = 66 mm and R5 = 33 mm appear on the fluorescent screen at the same time, and make the reflected echo of the arc with R4 = 66 mm reach the highest. The intersection position of the second plane scale line 5-2 of the first sector 1 or the third plane scale line 5-3 of the second sector 2 and the longitudinal projection of the probe is the incident point of the sound beam.

[0032] As Figure 8 shown in the figure, measure the distance L2 from the front edge of the probe to the outer cylinder of the first sector 1 with a scale, and calculate the front edge distance of the probe according to the following formula:

[0033] .

[0034] Example 2:

[0035] For the determination of the incident point and the front edge length of the plane inclined probe, as Figure 9 , Figure 10 shown in the figure, during the test, place the plane probe on the fifth plane 3-1 of the third sector 3, and move the probe to make the reflected echo of the arc with R8 = 66 mm reach the highest. The intersection position of the second end face scale line 4-2 or the fifth plane scale line 5-5 of the second end face 3-2 of the third sector 3 and the longitudinal projection of the probe is the incident point of the sound beam.

[0036] As Figure 10 shown in the figure, measure the distance L3 from the front edge of the probe to the outer cylinder of the third sector 3 with a scale, and calculate the front edge distance of the probe according to the following formula:

[0037] .

[0038] Example 3:

[0039] Measurement of the longitudinal wave straight probe acoustic axis deflection angle is as follows Figure 11 As shown in the figure, during the test, place the probe on the fifth plane 3-1 of the third sector 3. Move the probe to make the reflected echo of the arc with R8 = 66 mm reach the highest. Use a scale to measure the distance S1 from the probe end to the outer cylinder of the third sector 3 and the diameter D of the probe. Calculate the deviation of the probe acoustic axis in one direction according to the following formula:

[0040]

[0041] Rotate the probe by 90°. Move the probe to make the reflected echo of the arc with R8 = 66 mm reach the highest. Use a scale to measure the distance S2 from the probe end to the outer cylinder of the third sector 3. Calculate the deviation of the probe acoustic axis in the direction perpendicular to the first direction according to the following formula:

[0042] ;

[0043] Calculate the probe acoustic axis deflection angle according to the following formula:

[0044] .

[0045] Example 4:

[0046] Measurement of the transverse wave inclined probe and longitudinal wave small angle probe acoustic axis deflection angle is as follows Figure 12 As shown in the figure, during the test, place the probe on the fifth plane 3-1 of the third sector 3. Make the sound beam incident direction perpendicular to the outer cylinder surface. Move the probe back and forth and swing it to make the reflected echo of the arc with R8 = 66 mm reach the highest. Press the long side of the ruler against the probe side and place one end angle of it on the arc end face. Use a scale to measure the distance a from the other end angle to the arc end face and the width d of the ruler. Calculate the probe acoustic axis deflection angle according to the following formula:

[0047] .

[0048] Example 5:

[0049] When measuring the pulse width, on the third sector 3, make the echo amplitude from R8 = 66mm the highest. The ranging calibration can be carried out using R66 / R33. Read the probe incident point corresponding to the center of the test block and the probe front length value and record them. The analyzer in this embodiment uses a LEEB510 portable digital ultrasonic flaw detector. Then, on the analyzer, use the "M" key and the "Auto Setup" key to find the first echo. Use the "Scale" key to make one large horizontal grid on the analyzer screen represent 1μs. At this time, you can first press the "Measure" key, and the display will show "Measurement Gate, CH1, CH2, Math, Screen Capture" in sequence. Select the "Math" key, and the display will show "Measurement, Period, Frequency, Peak - to - Peak, etc." in sequence. Use the "Multi - function Knob" to select "Peak - to - Peak" and press it. Stabilize the probe and the echo, and read the number of "Peak - to - Peak" below the display screen, which is Vc. Press the "Cursor" key, and the display will show "Type (Amplitude / Frequency)", "Source (Math Off / FFT)", "ΔV", "Cursor 1", "Cursor 2" in sequence.

[0050] Select (Amplitude) in "Type", press the "Multi - function Knob", and use the "Multi - function Knob" to make the amplitude lines of "Cursor 1" and "Cursor 2" at the position of 5Vc%. At this time, the ΔV value will show 10Vc%, and then the pulse width can be read.

[0051] Example 6:

[0052] Measurement of relative pulse - echo sensitivity: After measuring the pulse width, remove the probe from the test block and wipe off the coupling agent. Read the value Va of "Peak - to - Peak" below the display screen of the ultrasonic flaw detector. Calculate the relative pulse - echo sensitivity according to the following formula:

[0053] Srel = 20Log10(Vc / Va).

[0054] Example 7:

[0055] Measurement of the center frequency and relative bandwidth: The analyzer in this embodiment uses a LEEB510 portable digital ultrasonic flaw detector. When the system is in the pulse - width test state, press the "Source" key and adjust it in cooperation with the "Horizontal Position", "Vertical Position", "Scale", and "Acquisition" keys.

[0056] The display may show "Source Waveform, Source, Window (Hanning, Flat Top, Rectangle), FFT Zoom" in sequence. Press the "Cursor" key, and the display will show "Type Amplitude" and "Source Math Off". Be sure to press the "Source Math Off" key first, use the "Multi - function Knob" to select "Source" and press the "Multi - function Knob", press the "Type Amplitude" key to select "Frequency" and press the "Multi - function Knob" key. At this time, the display will show "Type Frequency, Source FFT, ΔHz, Cursor 1, Cursor 2" in sequence.

[0057] The spectrogram can be repeatedly adjusted with the "M" key and the "FFT key". When using different types of probes, not only do you need to appropriately magnify the spectrogram, but more importantly, you need to use the "1" key to select different voltages and an appropriate "attenuation ×1~1000" so that the dB value under the "cursor" is displayed as a positive number rather than a negative number. For example, Figure 10 . For example: 2.5P20 straight probe. "Attenuation ×50" should be selected.

[0058] Select "type amplitude" again to make the cursor line horizontal. Use the "multi-functional knob" to move "cursor 1" to the top of the spectrogram, and move "cursor 2" line, 6 dB down from "cursor 1" line. Move the spectrogram so that the intersection of the left side line of the spectrogram and "cursor 2" line aligns with a certain vertical line on the screen. Take this intersection point as the 0 point, and take the intersection of the right side line of the spectrogram and "cursor 2" line as the g point. The width between the 0 and g points on the screen is the bandwidth Δf.

[0059] Press the "type frequency" key again to make the cursor line vertical, so that "cursor 1" line coincides with the 0 point to get f1, and "cursor 2" line coincides with Figure 11 the g point in to get f2. Calculate the center frequency and relative bandwidth according to the following formula:

[0060] fo = (f2 + f1) / 2

[0061] Δfrel = (Δf / fo) × 100%.

[0062] In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An ultrasonic probe performance highly integrated detection test block, comprising a first sector (1), a second sector (2) and a third sector (3) which are successively connected into one body and have different radii and are in the shape of semi-cylinders, characterized in that : The centers of the first fan body (1), the second fan body (2) and the third fan body (3) are on the same straight line. The radius of the semi-cylindrical body of the second fan body (2) is smaller than the radius of the semi-cylindrical body of the first fan body (1), the radius of the semi-cylindrical body of the first fan body (1) is smaller than the radius of the semi-cylindrical body of the third fan body (3), and the semi-cylindrical radius of the third fan body (3) is 2 ± 0.5 times the radius of the semi-cylindrical body of the second fan body (2). Both the first fan body (1) and the second fan body (2) have a convex arc surface and a flat surface on the side vertical surface opposite to the arc surface; the side vertical surface of the third fan body (3) opposite to the arc surface is a flat surface. On the side vertical surface of the first fan body (1), a first flat surface (1-1), a first convex arc surface (1-2), a second flat surface (1-3) and a second convex arc surface (1-4) are successively arranged; the top of the first fan body (1) has a first end surface (1-5). On the side vertical surface of the second fan body (2), a third convex arc surface (2-1), a third flat surface (2-2) and a fourth flat surface (2-3) are successively arranged. The side vertical surface of the third fan body (3) is a fifth flat surface (3-1), and the top of the third fan body (3) is a second end surface (3-2).

2. The high-integration detection test block for ultrasonic probe performance according to claim 1, characterized in that : The arc radii of the first convex arc surface (1-2), the second convex arc surface (1-4) and the third convex arc surface (2-1) are equal.

3. The high-integration detection test block for ultrasonic probe performance according to claim 2, characterized in that : A first end surface marking line (4-1) is provided on the first end surface (1-5) of the first fan body (1); a second end surface marking line (4-2) is at the center of the second end surface (3-2) of the third fan body (3).

4. The highly integrated ultrasonic probe performance detection test block according to claim 3, characterized in that : On the axes of the first flat surface (1-1) and the second flat surface (1-3) of the first fan body (1), there are a first flat surface marking line (5-1) and a second flat surface marking line (5-2) respectively, on the axes of the third flat surface (2-2) and the fourth flat surface (2-3) of the second fan body (2), there are a third flat surface marking line (5-3) and a fourth flat surface marking line (5-4) respectively, and a fifth flat surface marking line (5-5) is provided on the axis of the fifth flat surface (3-1) of the third fan body (3).

5. The highly integrated detection test block for ultrasonic probe performance according to claim 2, characterized in that : The centers of the arcs of the first convex arc surface (1-2), the second convex arc surface (1-4) and the third convex arc surface (2-1) are on the same axis.

6. The high-integration detection test block for ultrasonic probe performance according to claim 3, characterized in that : The lengths of the first end surface marking line (4-1) and the second end surface marking line (4-2) are both 5 mm, and the marking line depths are both 0.3 mm.

7. The high-integration detection test block for ultrasonic probe performance according to claim 4, characterized in that : The marking line depths of the first flat surface marking line (5-1), the second flat surface marking line (5-2), the third flat surface marking line (5-3), the fourth flat surface marking line (5-4) and the fifth flat surface marking line (5-5) are 0.1 mm to 0.15 mm, and the first end surface marking line (4-1) is connected to the first flat surface marking line (5-1), and the second end surface marking line (4-2) is connected to the fourth flat surface marking line (5-4) and the fifth flat surface marking line (5-5).

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