CN217561417U - Device for measuring sound beam diffusion angle of ultrasonic probe - Google Patents
Device for measuring sound beam diffusion angle of ultrasonic probe Download PDFInfo
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- CN217561417U CN217561417U CN202220862795.7U CN202220862795U CN217561417U CN 217561417 U CN217561417 U CN 217561417U CN 202220862795 U CN202220862795 U CN 202220862795U CN 217561417 U CN217561417 U CN 217561417U
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Abstract
The utility model relates to a device for measuring ultrasonic transducer sound beam spread angle, including two different radial semicircle test blocks, signal reception probe and angle measuring device, the signal reception probe slides along the arc surface of semicircle test block and sets up, forms in the middle of the semicircle test block axial plane and is put the position by the survey probe, and angle measuring device is used for measuring signal reception probe's relative deflection angle. The utility model discloses utilize two semicircle test blocks of different radiuses can survey four angle values, utilize four angle values and big semicircle test block radius, the triangle relation that little semicircle test block radius constitutes, can more accurate calculate main acoustic beam center pin and acoustic beam edge diffusion line formed upper and lower spread angle, compare the measuring method of prior art more accurate, provide a quick, accurate, effectual probe acoustic beam diffusion angle and refraction angle measuring method for the ultrasonic flaw detection trade; the method has the advantages of simple measurement operation, high measurement efficiency, high measurement precision and wide application range.
Description
Technical Field
The utility model relates to an ultrasonic probe sound field characteristic measuring device technical field, especially a device for measuring ultrasonic probe sound beam spread angle.
Background
The ultrasonic wave emitted from the piezoelectric ceramic to the medium has a near field region and a far field region, and theoretically, the ultrasonic wave does not diffuse in the near field region, and the sound beam starts to diffuse beyond the near field by 1.64 times. Ultrasonic waves are well established and widely used for measuring sound field characteristics in liquids. It is difficult to test the sound field characteristics in solid materials such as steel, for example, to measure the diffusion angle of an ultrasonic probe, only by means of an artificial hole of a test block, moving the relative position of the probe and the hole, and judging the sound beam characteristics according to the intensity change of the reflected signal, the oblique probe is generated by refracting the longitudinal wave because the transverse wave sound beam is a longitudinal wave, the cross section of the refracted transverse wave is compressed in the refraction direction, the main sound beam axis is different from the upper and lower parts of the refracted wave, i.e. the upper and lower diffusion angles are different, as shown in fig. 1, in the figure, alpha is the incident angle, beta is the refraction angle, and theta is different from the incident angle, beta is the refraction angle On the upper part At an upper diffusion angle, θ Lower part Is the lower divergence angle. The traditional methods for measuring the diffusion angle mainly include the following methods: one is a calculation method, i.e. using the formula of the divergence angle. Secondly, the main sound beam is measured by using a transverse through hole test block, then the probe is moved back and forth, the reflected wave is reduced by a certain amplitude (such as-6 dB), and the diffusion angle is calculated according to the displacement of the probe. Thirdly, a receiving probe is placed on the arc surface by using a semicircular test block, the sound beam of the probe at the position of the circle center is received, the position of the receiving probe on the arc surface is slid, the transmitted wave is reduced by a certain amplitude (such as-3 dB), and the diffusion angle is measured by using a protractor according to the position of the receiving probe.
The traditional method for measuring the diffusion angle has the following defects: 1) The method is calculated by using a diffusion angle approximation formula, the probe frequency and the area of the piezoelectric ceramic piece are required, a common probe manufacturer only provides a nominal frequency, the nominal frequency is greatly different from an actual measurement frequency, a flaw detection unit generally rarely has the condition of measuring the frequency by using a frequency spectrograph and an impedance meter, the area of the piezoelectric ceramic piece has tolerance, and the formula calculation has large errors. 2) By utilizing the transverse through hole test of different depths of the test block, when the displacement is measured, the probe displacement and the cross section of the sound beam have an angle, and a plurality of obtained displacements can not obtain a more accurate result through extremely complicated calculation. 3) A semicircle test block measuring method is utilized, a probe or a grid type probe group cut by piezoelectric ceramics is used for receiving the position of the maximum value of a sound wave signal and the position when the signal is reduced by-3 dB on an arc surface, and a protractor is used for measuring a diffusion angle, as shown in attached figures 2 and 3, the protractor cannot obtain the value of the diffusion angle but the included angle theta between the diffusion angle and a measuring point, and the protractor is not a really meaningful diffusion angle. Therefore, the three methods have no effect on the large-divergence-angle probe of small-size piezoelectric ceramic or have large measurement and calculation errors, and the large-divergence-angle probe is utilized in many places in the detection, such as the TOFD probe used by a TOFD flaw detector, so that the development of a device capable of quickly and accurately measuring the divergence angle of the ultrasonic probe is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is to overcome prior art's shortcoming, provides a device for measuring ultrasonic probe acoustic beam spread angle, and upper and lower spread angle that main acoustic beam center pin and acoustic beam edge spread line formed can be more accurate, and measurement operation is simple, and measurement of efficiency is high, and measurement of accuracy is high, and application scope is wide.
The utility model adopts the following technical scheme:
the utility model provides a device for measuring ultrasonic probe acoustic beam spread angle, includes two different radial semicircle test blocks, signal reception probe and angle measurement device, and signal reception probe slides along the arc surface of semicircle test block and sets up, forms in the middle of the semicircle test block axial plane and places the position by the measuring probe, and angle measurement device is used for measuring signal reception probe's relative deflection angle.
Furthermore, the angle measuring device comprises a fixed ruler, a rotating ruler and a locking button, the rotating ruler is hinged on the fixed ruler, the central line of a hinged shaft is coaxial with the center of a circle of the semicircular test block, the locking button is used for locking and fixing the rotating ruler relative to the fixed ruler, the fixed ruler is fixedly connected with the semicircular test block, and the rotating ruler is connected with the signal receiving probe and slides along the arc surface of the semicircular test block along with the signal receiving probe to rotate relative to the fixed ruler.
Furthermore, the two semicircular test blocks with different radiuses are connected into an integral part; two signal receiving probes which are respectively matched with the arc surfaces of the two semicircular test blocks are fixedly connected to the rotating ruler, or a signal receiving probe is arranged on the rotating ruler in a guiding sliding mode and can move to the position matched with the arc surfaces of the two semicircular test blocks.
Furthermore, the signal receiving probe comprises a receiving probe body and a sliding block assembly, the sliding block assembly comprises a shell and a miniature bearing rotatably arranged on the shell, and a coupling oil box and a probe mounting groove are formed in the shell; the coupling oil box is arranged corresponding to the miniature bearing and is used for lubricating the miniature bearing and the arc surface of the semicircular test block, so that the miniature bearing is in lubrication contact with the arc surface of the semicircular test block; the receiving probe body is movably arranged in the probe mounting groove through a spring, is in acoustic coupling with the arc surface of the semicircular test block and receives a signal of a measured probe; the outer part of the shell is provided with a probe connector used for connecting an ultrasonic flaw detector, and the probe connector is electrically connected with the receiving probe body.
Furthermore, an oil absorption sponge is arranged in the coupling oil box and is in contact with the miniature bearing.
Further, the receiving probe body adopts a line contact type focusing receiving probe.
Furthermore, the angle measuring device adopts a digital display angle ruler with a zero clearing function.
Furthermore, the semicircular test block is made of the same material as the flaw detection material, so that the measured spread angle is consistent with the spread angle of the sound beam of the ultrasonic probe during actual flaw detection.
Further, the device for measuring the sound beam spread angle of the ultrasonic probe further comprises a test block fixing support used for fixing the semicircular test block, and the semicircular test block is supported and arranged on the test block fixing support through connecting blocks connected to the two sides of the semicircular test block.
Further, the device for measuring the divergence angle of the sound beam of the ultrasonic probe is provided with a measurement number table so as to quickly obtain the divergence angle by looking up the table.
From the above description of the present invention, compared with the prior art, the present invention has the following advantages:
firstly, four angle values can be measured by utilizing two semicircular test blocks with different radiuses, and by utilizing the triangular relation formed by the four angle values, the radius of a small semicircular test block and the radius of a large semicircular test block, the upper diffusion angle and the lower diffusion angle formed by a main sound beam central axis and a sound beam edge diffusion line can be accurately calculated.
Secondly, the utility model adopts a semi-circle test block which is homogeneous with the flaw detection material, so that the measured spread angle is consistent with the spread angle of the sound beam of the probe for actual flaw detection; the semicircular test block is supported and arranged on the test block fixing support through the connecting block, so that the angle measuring device has larger sliding arc length and measuring rotation angle; by arranging the coupling oil box, the micro bearing is in lubrication contact with the arc surface of the semicircular test block, so that the sound transmission of the signal receiving probe and the arc surface of the semicircular test block can be ensured; the signal receiving probe adopts a line contact type focusing receiving probe, and the angle measuring device adopts a digital display angle gauge, so that the measuring precision can be ensured, and the device is generally used for measuring the diffusion angle of probes with different frequencies.
Third, the utility model discloses measure easy operation to the configuration is measured the number table, can obtain upper and lower diffusion angle value through looking up the table according to the angle value that records fast, has removed complicated computational process from, can improve measurement of efficiency.
Fourthly, the utility model discloses a measuring device application scope is wide, except measuring oblique probe spread angle, refraction angle, still can measure the spread angle of straight probe, sound beam center offset, measures the spread angle and the refraction angle of TOFD probe, measures the spread angle and the refraction angle etc. of low-angle probe; on the basis of the existing device, after structural members are added according to actual conditions, the parameters of the sound beam center deviation, the sound beam side lobe and the grating lobe of the approximate spherical wave of the phased array probe unit can be measured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the prior art for measuring the divergence angle of a sound beam of a straight probe by using a semicircular test block;
FIG. 3 is a schematic diagram of the prior art for measuring the divergence angle of an acoustic beam of an oblique probe by using a semicircular test block;
fig. 4 is a schematic view of the whole structure of the device for measuring the sound beam divergence angle of the ultrasonic probe according to embodiment 1 of the present invention;
fig. 5 is a schematic cross-sectional structural view of a signal receiving probe according to embodiment 1 of the present invention;
FIG. 6 is a schematic diagram of the principle of the present invention for measuring the spread angle of the acoustic beam of the straight probe by using two semicircular test blocks with different radii;
FIG. 7 is a schematic diagram of the present invention using two semicircular test blocks with different radii to measure the divergence angle of the sound beam of the angle probe;
fig. 8 is a schematic structural diagram of an apparatus for measuring an angle of divergence of an acoustic beam of an ultrasonic probe according to embodiment 2 of the present invention.
In the figure: 1. a large semicircle test block, 2 a small semicircle test block, 3 a signal receiving probe, 31 a receiving probe body, 311 a probe shell, 312 a piezoelectric ceramic piece, 313 a piezoelectric ceramic protective block, 314 a sound absorption block, 32 a shell, 33 a micro bearing, 34 a coupling oil box, 341, oil absorption sponge, 35, a probe installation groove, 36, a spring, 37, a probe connector, 38, a lead wire, 4, an angle measuring device, 41, a fixed ruler, 42, a rotating ruler, 421, a zero scale line window, 43, a locking button, 5, a test block fixing support and 6, a connecting block.
Detailed Description
The present invention will be further described with reference to the following detailed description.
Example 1
Referring to fig. 4 to 7, the utility model discloses a device for measuring ultrasonic probe sound beam spread angle, including different radial semicircle test blocks (great semicircle test block 1 and little semicircle test block 2), signal reception probe 3, angle measuring device 4, test block fixed bolster 5 and measurement number table. The signal receiving probe 3 is arranged along the arc surface of the two semicircular test blocks in a sliding manner, a detected probe placing position is formed in the middle of the axial plane of the two semicircular test blocks, and the angle measuring device 4 is used for measuring the relative deflection angle of the signal receiving probe 3. The test block fixing support 5 is used for fixing the semicircular test block.
The angle measuring device 4 adopts a digital display angle ruler with a zero clearing function, and comprises a fixed ruler 41, a rotating ruler 42 and a locking button 43, wherein the rotating ruler 42 is hinged on the fixed ruler 41, the central line of a hinged shaft is coaxial with the center of a circle of a semicircular test block, the locking button 43 is used for locking and fixing the rotating ruler 42 relative to the fixed ruler 41, the fixed ruler 41 is fixedly connected with the semicircular test block, and the rotating ruler 42 is connected with the signal receiving probe 3 and slides along the arc surface of the semicircular test block along with the signal receiving probe 3 to rotate relative to the fixed ruler 41. The rotating ruler 42 is provided with a zero scale line window 421.
The signal receiving probe 3 includes a receiving probe body 31 and a slider assembly. The slider assembly comprises a housing 32 and a micro bearing 33 rotatably mounted on the housing 32, wherein a coupling oil box 34 and a probe mounting groove 35 are formed in the housing 32. The coupling oil box 34 is arranged corresponding to the micro bearing 33, the oil absorption sponge 341 is arranged in the coupling oil box 34, and the oil absorption sponge 341 is arranged in contact with the micro bearing 33 and used for lubricating the micro bearing 33 and the arc surface of the semicircular test block, so that the micro bearing 33 is in lubricating contact with the arc surface of the semicircular test block. The receiving probe body 31 is movably installed in the probe installation groove 35 through a spring 36, and is acoustically coupled with the arc surface of the semicircular test block to receive a signal of the measured probe. A probe connector 37 for connecting an ultrasonic flaw detector is provided outside the housing 32, and the probe connector 37 is electrically connected to the receiving probe body 31 through a lead 38. The receiving probe body 31 adopts a line contact type focusing receiving probe, and comprises a probe shell 311, a piezoelectric ceramic piece 312, a piezoelectric ceramic protecting block 313, a sound absorbing block 314 and an electric matcher.
The central axes of the large semicircular test block 1 and the small semicircular test block 2 are aligned and connected into a step-shaped integral component, and the integral component is supported and arranged on the test block fixing bracket 5 through the connecting blocks 6 connected to the two sides of the large semicircular test block 1. The rotating ruler 42 is fixedly connected with two signal receiving probes 3 which are respectively matched with the arc surfaces of the large and small semicircular test blocks. The two semicircular test blocks are made of the same material as the flaw detection material, so that the measured spread angle is consistent with the spread angle of the sound beam of the ultrasonic probe during actual flaw detection.
The measurement number table is used for rapidly obtaining the diffusion angle through table look-up, and data of the measurement number table is obtained through computer programming calculation according to a calculation formula. The measuring gauge is waterproof and oilproof through film coating treatment, so that great convenience is brought to users to measure and use, and great help is provided for flaw detection personnel to use characteristic parameters of the probe and improve flaw detection precision.
Referring to fig. 7, the utility model discloses an acoustic beam spread angle of oblique probe is measured to device for measuring ultrasonic probe acoustic beam spread angle, including following step:
1) Measurement with small semi-circular test block:
fixing the detected probe, placing and coupling an inclined probe on a detected probe placing position in the middle of the axial plane of the small semicircular test block 2, moving the probe back and forth to enable a reflected signal of the ultrasonic flaw detector to be strongest, and fixing the detected probe on the position of the small semicircular test block 2;
measuring a refraction angle beta angle, sliding a rotating ruler 42 connected with a signal receiving probe 3 into a whole for zero angle correction, rotating a zero scale line of the rotating ruler 42 to be aligned with an OS scale line of the small semicircular test block 2 through a zero scale line window 421, and pressing a zero clearing key to clear the angle reading if the digital display angle reading is not 0; then clockwise stir the signal receiving probe 3 along the arc surface of the small semicircular test block 2, the rotating ruler 42 rotates along with the signal receiving probe, when the signal received by the signal receiving probe 3 is strongest, the angle displayed by the digital display angle ruler is a refraction angle beta (at the moment, the signal wave of the A-type ultrasonic flaw detector is adjusted to be 100% wave height, namely full amplitude), and data are recorded;
after the refraction angle beta is measured, a clear key is pressed to clear the angle index, then the signal receiving probe 3 is continuously stirred, the rotating ruler 42 rotates along with the signal receiving probe 3, when the receiving signal of the signal receiving probe 3 drops to-6 dB (according to the flaw detection requirement, the diffusion angle of-3 dB is measured), at the moment, the signal receiving probe 3 is at the point a in the graph, and the angle displayed by the digital display angle ruler is °aOC 1 The angle value of (c), record data;
the signal receiving probe 3 is toggled anticlockwise by the same method to measure the & lt bOC 1 The angle value of (d);
2) Measurement with a large semicircular test block:
moving the detected probe to the large semicircular test block 1 by adoptingThe angle AOC is measured by the same method as the small semicircle test block 2 2 、∠BOC 2 The angle value of (d);
3) According to the radius R and R of the small semicircle test block 2 and the large semicircle test block 1 and the measured angle values of ≥ aOC1 and ≤ bOC 1 、∠AOC 2 、∠BOC 2 The upper diffusion angle theta can be calculated by a trigonometric relation formula On the upper part And lower diffusion angle theta Lower part . By measuring a number table according to ≈ aOC 1 、∠AOC 2 The value is directly looked up to obtain the upper diffusion angle theta On the upper part Numerical value according to < bOC 1 、∠BOC 2 The value is directly looked up to obtain the lower expansion angle theta Lower part Numerical values.
The trigonometric formula is:
referring to fig. 6, the device for measuring the sound beam spread angle of an ultrasonic probe of the present invention measures the sound beam spread angle of a straight probe, and is different from the oblique probe spread angle measuring method in that the straight probe measures the zero deflection angle, the oblique probe measures the refraction angle β first, and other methods are the same.
Example 2
The present example differs from example 1 in that: a signal receiving probe 3 is arranged on the rotating ruler 42 in a guiding and sliding way, and the signal receiving probe 3 can move to a position matched with the arc surfaces of the two semicircular test blocks. During measurement, the signal receiving probe 3 is respectively matched with the large semicircular test block 1 and the small semicircular test block 2 in a sliding contact manner by guiding the position of the sliding signal receiving probe 3 along the rotating ruler 42.
Example 3
Referring to fig. 8, the present embodiment is different from embodiment 1 in that: the two semicircular test blocks with different radiuses are respectively provided with a signal receiving probe 3 and an angle measuring device 4. The two semicircular test blocks are respectively supported and arranged on the test block fixing bracket 5 through connecting blocks 6 connected to the two sides of the test blocks. The rotating ruler 42 is made of transparent materials, and the zero line is convenient to align.
The aforesaid is only the utility model discloses a three embodiment, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (10)
1. An apparatus for measuring an acoustic beam spread angle of an ultrasonic probe, characterized in that: the device comprises two semicircular test blocks with different radiuses, a signal receiving probe and an angle measuring device, wherein the signal receiving probe is arranged along the arc surface of each semicircular test block in a sliding mode, a detected probe placing position is formed in the middle of the axial plane of each semicircular test block, and the angle measuring device is used for measuring the relative deflection angle of the signal receiving probe.
2. The apparatus for measuring an angle of divergence of an acoustic beam of an ultrasonic probe according to claim 1, wherein: the angle measuring device comprises a fixed ruler, a rotating ruler and a locking button, wherein the rotating ruler is hinged to the fixed ruler, the central line of a hinged shaft is coaxial with the center of a semicircular test block, the locking button is used for locking and fixing the rotating ruler relative to the fixed ruler, the fixed ruler is fixedly connected with the semicircular test block, and the rotating ruler is connected with a signal receiving probe and slides along the arc surface of the semicircular test block along with the signal receiving probe to rotate relative to the fixed ruler.
3. The apparatus for measuring the beam spread angle of an ultrasonic probe according to claim 2, wherein: the two semicircular test blocks with different radiuses are connected into an integral component; two signal receiving probes which are respectively matched with the arc surfaces of the two semicircular test blocks are fixedly connected to the rotating ruler, or a signal receiving probe is arranged on the rotating ruler in a guiding sliding mode and can move to the position matched with the arc surfaces of the two semicircular test blocks.
4. An apparatus for measuring the beam spread angle of an ultrasonic probe according to any one of claims 1 to 3, wherein: the signal receiving probe comprises a receiving probe body and a sliding block assembly, the sliding block assembly comprises a shell and a miniature bearing rotatably arranged on the shell, and a coupling oil box and a probe mounting groove are formed in the shell; the coupling oil box is arranged corresponding to the miniature bearing and is used for lubricating the miniature bearing and the arc surface of the semicircular test block, so that the miniature bearing is in lubrication contact with the arc surface of the semicircular test block; the receiving probe body is movably arranged in the probe mounting groove through a spring, is in acoustic coupling with the arc surface of the semicircular test block and receives a signal of a measured probe; the outer part of the shell is provided with a probe connector used for connecting an ultrasonic flaw detector, and the probe connector is electrically connected with the receiving probe body.
5. The apparatus for measuring an angle of divergence of an acoustic beam of an ultrasonic probe according to claim 4, wherein: an oil absorption sponge is arranged in the coupling oil box and is in contact with the miniature bearing.
6. The apparatus for measuring an angle of divergence of an acoustic beam of an ultrasonic probe according to claim 4, wherein: the receiving probe body adopts a line contact type focusing receiving probe.
7. An apparatus for measuring the beam spread angle of an ultrasonic probe according to claim 1 or 2, wherein: the angle measuring device adopts a digital display angle gauge with a zero clearing function.
8. The apparatus for measuring the beam spread angle of an ultrasonic probe according to claim 1, wherein: the semicircular test block is made of the same material as a flaw detection material, so that the measured spread angle is consistent with the spread angle of the sound beam of the ultrasonic probe during actual flaw detection.
9. An apparatus for measuring the beam spread angle of an ultrasonic probe according to any one of claims 1 to 3, wherein: still include the test block fixed bolster for fixed semicircle test block, the semicircle test block supports through connecting in the connecting block of its both sides and sets up on the test block fixed bolster.
10. An apparatus for measuring the beam spread angle of an ultrasonic probe according to any one of claims 1 to 3, wherein: a measurement counter is provided to quickly derive the spread angle by looking up the table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220862795.7U CN217561417U (en) | 2022-04-14 | 2022-04-14 | Device for measuring sound beam diffusion angle of ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220862795.7U CN217561417U (en) | 2022-04-14 | 2022-04-14 | Device for measuring sound beam diffusion angle of ultrasonic probe |
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| CN217561417U true CN217561417U (en) | 2022-10-11 |
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| CN202220862795.7U Expired - Fee Related CN217561417U (en) | 2022-04-14 | 2022-04-14 | Device for measuring sound beam diffusion angle of ultrasonic probe |
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