A phased array ultrasonic wedge parameter calibration method

Abstract

The application relates to a phased array ultrasonic wedge parameter calibration method, which comprises the following steps: setting a workpiece sound velocity as a standard test block sound velocity, setting initial parameters of a wedge, setting a sector scanning strategy; once or multiple times selecting a waveform display angle to determine a selected refraction angle, using a plurality of test blocks with different depth horizontal hole reflectors to obtain different sound paths in a workpiece; and / or measuring a horizontal distance from a probe front to a horizontal hole; and determining a sound velocity of the wedge and / or a size of the wedge according to the standard test block sound velocity, the initial parameters of the wedge and / or the horizontal distance. The application can calibrate a wedge parameter model by using limited times of independent positioning measurement data, so as to achieve the goal of calibrating all detection data.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic nondestructive testing, and particularly relates to a phased array ultrasonic wedge parameter calibration method. BACKGROUND

[0002] The conventional phased array detection system calibration method follows the time delay calibration method of single crystal ultrasonic waves, and uses 50mm and 100mm circular arc reflecting surfaces to calibrate the incident zero point delay of the sound beam. For the phased array detection system, independent time delay zero point calibration is required for each angle of the sound beam. The sound beam angle is also measured by a test block one by one, and the positioning reading is corrected.

[0003] The conventional calibration method is relatively complex in operation, low in efficiency, long in time and lacks correct understanding of the causes of errors when the phased array uses the fan-shaped scanning function, so the calibration object cannot be accepted by the positioning system of the instrument, and only the calibration error can be deducted from the reading. SUMMARY

[0004] Therefore, it is necessary to provide a phased array ultrasonic wedge parameter calibration method to solve the problems of complex operation, low efficiency and long time when the phased array uses the fan-shaped scanning function.

[0005] In order to solve the above technical problems, the present application provides a phased array ultrasonic wedge parameter calibration method, comprising:

[0006] setting the workpiece sound speed as the standard test block sound speed, setting the wedge initial parameters, and setting the fan-shaped scanning strategy;

[0007] selecting the waveform display angle one or more times to determine the selected refraction angle, and using a plurality of test blocks of different depth horizontal hole reflectors to obtain different workpiece internal sound paths;

[0008] and / or measuring the horizontal distance from the probe front to the horizontal hole;

[0009] determining the sound speed of the wedge and / or the size of the wedge according to the standard test block sound speed, the wedge initial parameters and / or the horizontal distance.

[0010] In some possible implementation manners, the correction of the zero point delay parameter is further included, and the determination of the zero point delay parameter comprises:

[0011] setting the workpiece sound speed as the standard test block sound speed, setting the initial zero point delay, and setting the wedge not to be used;

[0012] using a plurality of test blocks of different depth horizontal hole reflectors to obtain different workpiece internal sound paths;

[0013] determining the zero point delay according to the standard test block sound speed, the initial zero point delay and the different workpiece internal sound paths.

[0014] In some possible implementations, when the sound velocity of the wedge is known and the size of the wedge is unknown:

[0015] The selection of waveform display angles is determined by selecting one or more refraction angles, and different internal sound paths within the workpiece are obtained using test blocks with reflectors of varying depths and transverse holes; and / or the horizontal distance from the probe tip to the transverse hole is measured; the sound velocity of the wedge and / or the size of the wedge are determined based on the sound velocity of the standard test block, the initial parameters of the wedge, and / or the horizontal distance, including:

[0016] Select the waveform display angle to determine the refraction angle, couple the probe to the echo of several short transverse holes at different depths of a preset standard test block, and obtain the sound path of several workpieces within the short transverse hole echo.

[0017] The first horizontal distance from the probe tip to the transverse hole is obtained based on the measurement.

[0018] The size of the wedge is determined based on the selected refraction angle, the sound path within several workpieces, the initial parameters of the wedge, the sound velocity of the standard test block, and the first horizontal distance.

[0019] In some possible implementations, when the speed of sound of the wedge is unknown and the size of the wedge is known:

[0020] The selection of waveform display angles is determined by selecting one or more refraction angles, and different internal sound paths within the workpiece are obtained using test blocks with reflectors of varying depths and transverse holes; and / or the horizontal distance from the probe tip to the transverse hole is measured; the sound velocity of the wedge and / or the size of the wedge are determined based on the sound velocity of the standard test block, the initial parameters of the wedge, and / or the horizontal distance, including:

[0021] Select the waveform display angle to determine the refraction angle, couple the probe to the echo of several short transverse holes at different depths of a preset standard test block, and obtain the sound path of several workpieces within the short transverse hole echo.

[0022] The sound velocity of the wedge is determined based on the selected refraction angle, the sound path within several workpieces, the initial parameters of the wedge, and the sound velocity of the standard test block.

[0023] In some possible implementations, when the speed of sound of the wedge and the size of the wedge are unknown:

[0024] The selection of waveform display angles is determined by selecting one or more refraction angles, and different internal sound paths within the workpiece are obtained using test blocks with reflectors of varying depths and transverse holes; and / or the horizontal distance from the probe tip to the transverse hole is measured; the sound velocity of the wedge and / or the size of the wedge are determined based on the sound velocity of the standard test block, the initial parameters of the wedge, and / or the horizontal distance, including:

[0025] Select the waveform display angle to determine the first selected refraction angle;

[0026] coupling the probe to a preset standard test block at several different depths of short transverse echo waves to obtain a fifth workpiece internal acoustic path and a sixth workpiece internal acoustic path of the short transverse echo waves;

[0027] selecting a second selected refraction angle again to determine a second selected refraction angle;

[0028] coupling the probe to a preset standard test block at several different depths of short transverse echo waves to obtain a seventh workpiece internal acoustic path and an eighth workpiece internal acoustic path of the short transverse echo waves;

[0029] respectively measuring a second horizontal distance and a third horizontal distance from the probe front to the horizontal hole;

[0030] determining the acoustic velocity of the wedge and the size of the wedge according to the first selected refraction angle, the second selected refraction angle, the fifth workpiece internal acoustic path, the sixth workpiece internal acoustic path, the seventh workpiece internal acoustic path, the eighth workpiece internal acoustic path, the wedge initial parameters, the standard test block acoustic velocity, and the second horizontal distance and the third horizontal distance.

[0031] In some possible implementation manners, the wedge initial parameters include a wedge height, a wedge angle, and a wedge acoustic velocity.

[0032] In some possible implementation manners, the wedge initial parameters include a wedge height, a wedge angle, a wedge acoustic velocity, and a wedge front distance.

[0033] In some possible implementation manners, the size of the wedge includes a wedge height, a wedge angle, and a wedge front distance.

[0034] In some possible implementation manners, the selected refraction angle is 45 degrees.

[0035] In some possible implementation manners, the first selected refraction angle is 35 degrees, and the second selected refraction angle is 65 degrees.

[0036] The beneficial effects of the above embodiment are that the phased array ultrasonic wedge parameter calibration method provided by the application can be used to measure the acoustic paths of two reflectors by using one oblique transverse wave when the acoustic velocity of the wedge is known and the size of the wedge is unknown, to calculate and calibrate the size of the wedge; can be used to measure the acoustic paths of two reflectors by using one oblique transverse wave when the acoustic velocity of the wedge is unknown and the size of the wedge is known, to calculate and calibrate the acoustic velocity of the wedge; and can be used to measure the acoustic paths of two reflectors by using two oblique transverse waves when the acoustic velocity of the wedge is unknown and the size of the wedge is unknown, to calculate and calibrate the size of the wedge and the acoustic velocity of the wedge. The application uses a limited number of independent positioning measurement data to correct the wedge parameters, so as to achieve the purpose of calibrating all detection data. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 An embodiment flowchart of the phased array ultrasonic wedge parameter calibration method provided by the application is shown. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] It should be understood that the illustrative drawings are not drawn to scale. The flowcharts used in this invention illustrate operations implemented according to some embodiments of the invention. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or performed simultaneously. Furthermore, those skilled in the art, guided by the content of this invention, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0040] In the description of the embodiments of the present invention, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0041] Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor systems and / or microcontroller systems.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] Figure 1 This is a schematic flowchart of an embodiment of the phased array ultrasonic wedge parameter calibration method provided by the present invention, as shown below. Figure 1 As shown, a method for calibrating phased array ultrasonic wedge parameters includes:

[0044] S101. Set the workpiece sound velocity to the standard test block sound velocity, set the initial parameters of the wedge block, and set the sector scanning strategy.

[0045] S102. Select the waveform display angle once or multiple times to determine the selected refraction angle, and use test blocks of transverse hole reflectors of different depths to obtain different internal sound paths of the workpiece.

[0046] S103, and / or measure the horizontal distance from the probe tip to the transverse hole;

[0047] S104. Determine the sound velocity of the wedge and / or the size of the wedge based on the sound velocity of the standard test block, the initial parameters of the wedge, and / or the horizontal distance.

[0048] Compared with existing technologies, this embodiment provides a phased array ultrasonic wedge parameter calibration method. When the wedge sound velocity is known and the wedge size is unknown, a single oblique shear wave is used to measure the sound path of two reflectors to calculate the calibration wedge size. When the wedge sound velocity and wedge size are unknown, a single oblique shear wave is used to measure the sound path of two reflectors to calculate the calibration wedge sound velocity. When both the wedge sound velocity and wedge size are unknown, two oblique shear waves are used to measure the sound path of two reflectors to calculate the calibration wedge size and wedge sound velocity. This invention uses a finite number of independent positioning measurement data to correct the wedge parameters, thereby achieving the purpose of calibrating all detection data.

[0049] It should be noted that the ultrasonic phased array testing system includes an ultrasonic phased array testing instrument, a probe, a wedge, and a comparison test block. The ultrasonic phased array testing instrument is connected to the phased array probe via a cable. A coupling agent is placed between the wedge and the probe, and the probe is placed on the surface to be tested of the part under test or the comparison test block. The ultrasonic pulse from the synchronization zero point of the phased array testing instrument to the probe surface typically has a fixed deviation. The effect of the transducer is transmitted to the workpiece surface through a delay caused by the front liner, the coupling layer from the transducer to the wedge, and the coupling layer from the wedge to the workpiece. These delays do not change with the refraction angle and can be considered as a lumped delay parameter. Once the probe and wedge parameters are confirmed to be accurate, the delay from the transducer to the wedge and the delay from the wedge to the workpiece can be calibrated. The former is related to the assembly of the probe and wedge, while the latter is related to the coupling conditions on the workpiece surface. The system zero-point delay generally varies little, and its main value is determined by the instrument and the probe front liner. Only one calibration with a new probe is required. To avoid errors caused by the wedge parameters, zero-point calibration is performed without using the wedge. Zero-point calibration is performed before the wedge parameters are calibrated.

[0050] In some embodiments of the present invention, the method further includes the correction of the zero-point delay parameter, wherein the determination of the zero-point delay parameter includes:

[0051] Set the workpiece sound velocity to the standard test block sound velocity, set the initial zero-point delay, and set not to use wedges;

[0052] Different internal sound paths of workpieces were obtained by using test blocks with transverse aperture reflectors of different depths.

[0053] The zero point delay is determined according to the standard block sound velocity, the initial zero point delay and the different workpiece sound paths.

[0054] In the specific embodiment of the present application, the workpiece sound velocity is set as the standard block sound velocity, the detection depth range is set as 120mm, the angle range is set as the using angle range, the wedge is not used, the zero-degree sound beam is selected, and the initial parameter is set as the zero point delay.

[0055] The probe is coupled to the Φ1mm×6mm short horizontal echo of the 20mm deep CS-III standard block, the probe is moved to maximize the reflector echo, and the sensitivity is adjusted in time to prevent the echo from being saturated. The workpiece sound path of the Φ1mm×6mm short horizontal echo of the 20mm deep CS-III standard block is locked and read out by the gate.

[0056] The probe is coupled to the Φ1mm×6mm short horizontal echo of the 60mm deep CS-III standard block, the probe is moved to maximize the reflector echo, and the sensitivity is adjusted in time to prevent the echo from being saturated. The workpiece sound path of the Φ1mm×6mm short horizontal echo of the 60mm deep CS-III standard block is locked and read out by the gate.

[0057] The actual incident zero point sound path error is calculated according to the ratio of the sound paths of the 20mm deep and 60mm deep target reflector echoes, and the calculation formula of the actual incident zero point sound path error is as follows:

[0058]

[0059] In the formula, s0 represents the actual incident zero point sound path error, s20 represents the sound path of the 20mm deep target reflector echo, and s60 represents the sound path of the 60mm deep target reflector echo. H20 H60

[0060] The calculation formula of the measured zero point delay is as follows:

[0061]

[0062] In the formula, s0 represents the actual incident zero point sound path error, c2 represents the block sound velocity, t0 represents the zero point delay in the initial parameter, and T0 represents the measured zero point delay.

[0063] The measured zero point delay is automatically calculated by the operating instrument system, the new zero point delay parameter is input and confirmed to be saved. The new detection parameter is saved, and the workpiece sound velocity is restored to the actual measured material sound velocity.

[0064] ​​It should be noted that, assuming the wedge speed of sound is known, the speed of sound of the wedge and its temperature characteristics do not change in the service life, according to the measured wedge service environment temperature, the actual wedge speed of sound can be calculated. The size of the wedge changes due to wear, and these sizes can be measured by a gauge, but there will be deviations, especially the size of the integrated probe after wear is not measurable, so the wedge size requires calibration. Because the wedge height and the wedge angle are simultaneously in the detection system, the wedge height and the wedge angle of the detection system are calibrated at the same time, and then the probe front distance is measured.

[0065] In some embodiments of the present application, when the wedge speed of sound is known and the wedge size is unknown, the one or more selection waveform display angles determine the selection refraction angle, a plurality of different depth transverse hole reflector test blocks are used to obtain different workpiece internal sound paths; and / or the horizontal distance from the probe front to the transverse hole is measured; the speed of sound of the wedge and / or the size of the wedge is determined according to the standard test block speed of sound, the initial parameters of the wedge and / or the horizontal distance, including:

[0066] The selection waveform display angle determines the selection refraction angle, the probe is coupled to the short transverse hole echo of the preset standard test block at a plurality of different depths, and a plurality of workpiece internal sound paths of the short transverse hole echo are obtained.

[0067] And / or according to the first horizontal distance from the probe front to the transverse hole measured;

[0068] The size of the wedge is determined according to the selection refraction angle, the plurality of workpiece internal sound paths, the initial parameters of the wedge, the speed of sound of the standard test block and the first horizontal distance.

[0069] In specific embodiments of the present application, when the wedge speed of sound is known and the wedge size is unknown, the initial parameters of the wedge include the wedge height, the wedge angle and the wedge front distance, the workpiece speed of sound is set as the standard test block speed of sound, the detection depth range is set as 120mm, and the angle range is set as the use angle range.

[0070] The selection waveform display angle is 45°, which determines the selection refraction angle.

[0071] The probe is coupled to the Φ1mm×6mm short transverse hole echo of 20mm depth of the CS-III standard test block, the probe is moved to maximize the reflector echo, and the sensitivity is adjusted in time to keep the echo unsaturated. The first workpiece sound path of the Φ1mm×6mm short transverse hole echo of 20mm depth is locked and read out by the gate.

[0072] The probe is coupled to the Φ1mm×6mm short transverse hole echo of 60mm depth of the CS-III standard test block, the probe is moved to maximize the reflector echo, and the sensitivity is adjusted in time to keep the echo unsaturated. The second workpiece sound path of the Φ1mm×6mm short transverse hole echo of 60mm depth is locked and read out by the gate.

[0073] The first horizontal distance of the probe front to the 60mm deep Φ1mm*6mm short horizontal hole is measured by a steel ruler, and the manual input operation instrument system is input.

[0074] The actual incident zero sound path error and the measured refraction angle are calculated according to the sound path ratio of the 20mm deep and 60mm deep target reflector echo, and the calculation formula of the actual incident zero sound path error is:

[0075]

[0076] In the formula, s H20 is the first workpiece sound path, s H60 is the second workpiece sound path, and s0 represents the actual incident zero sound path error.

[0077] The calculation formula of the measured refraction angle is:

[0078]

[0079] In the formula, B represents the measured refraction angle, s H20 is the first workpiece sound path, and s H60 is the second workpiece sound path.

[0080] The measured incident refraction angle is obtained according to the measured refraction angle, and the calculation formula of the measured incident refraction angle is:

[0081]

[0082] In the formula, c1 represents the wedge sound speed; c2 represents the test block sound speed, A represents the measured incident refraction angle, and B represents the measured refraction angle.

[0083] The calculation formula of the selected incident angle is determined according to the selected refraction angle:

[0084]

[0085] In the formula, α represents the selected incident angle, and β represents the selected refraction angle.

[0086] The wedge angle is calculated according to the wedge angle in the initial parameters of the wedge, the measured incident refraction angle and the selected incident angle, and the calculation formula of the wedge angle is:

[0087] A0=(α0+Aα).

[0088] In the formula, A0 represents the wedge angle, α0 represents the wedge angle in the initial parameters of the wedge, A represents the measured incident refraction angle, and α represents the selected incident angle.

[0089] The wedge height is determined according to the measured incident refraction angle, the actual incident zero sound path error, the wedge sound speed, the test block sound speed and the selected incident angle, and the calculation formula of the wedge height is:

[0090]

[0091] In the formula, H represents the wedge height, A represents the measured refraction angle, a represents the selected incident angle, s0 represents the actual incident zero path error, c1 represents the wedge speed, and c2 represents the test block speed.

[0092] The wedge front distance is determined according to the measured refraction angle, the wedge height, the measured incident refraction angle, and the first horizontal distance, and the wedge front distance calculation formula is:

[0093] L = 60 * tanB + H * tanA - l 60

[0094] In the formula, L represents the wedge front distance, B represents the measured refraction angle, H represents the wedge height, l represents the first horizontal distance, and A represents the measured incident refraction angle. 60

[0095] The wedge angle, the wedge height, and the wedge front distance are automatically calculated by operating the instrument system, new wedge parameters are input and confirmed to be saved, and the workpiece speed is restored.

[0096] It should be noted that sometimes the user is not clear about the wedge speed, or suspects that the speed of the wedge material has changed during use, causing beam control and detection positioning errors. When the size of the wedge does not change obviously, or the size of the wedge can be accurately measured by a measuring tool, the speed of the wedge can be calibrated by the test block.

[0097] In some embodiments of the present application, when the speed of the wedge is unknown and the size of the wedge is known, the selected refraction angle is determined by the selected waveform display angle, and different workpiece internal paths are obtained by using test blocks of several different depth transverse holes; the horizontal distance from the probe front to the transverse hole is measured; and the speed of the wedge and / or the size of the wedge are determined according to the standard test block speed, the initial parameters of the wedge, and / or the horizontal distance, including:

[0098] The selected refraction angle is determined by the selected waveform display angle, the probe is coupled to the short transverse hole echo of the preset standard test block at several different depths, and several workpiece internal paths of the short transverse hole echo are obtained;

[0099] The speed of the wedge is determined according to the selected refraction angle, the several workpiece internal paths, the initial parameters of the wedge, and the speed of the standard test block.

[0100] In some specific embodiments of the present application, when the speed of the wedge is unknown and the size of the wedge is known, the initial parameters of the wedge include the wedge height, the wedge angle, and the wedge speed, the workpiece speed is set as the standard test block speed, the detection depth range is set as 120mm, and the angle range is set as the use angle range. ​

[0101] Select the wave form display angle 45° to determine the selected refraction angle.

[0102] Couple the probe to the CS-III standard block 20mm deep Φ1mm x 6mm short horizontal echo, move the probe to maximize the reflector echo, and note that the sensitivity is adjusted at any time to keep the echo unsaturated. Use the gate to lock in the third workpiece sound path of the 20mm deep Φ1mm x 6mm short horizontal echo.

[0103] Couple the probe to the CS-III standard block 60mm deep Φ1mm x 6mm short horizontal echo, move the probe to maximize the reflector echo, and note that the sensitivity is adjusted at any time to keep the echo unsaturated. Use the gate to lock in the fourth workpiece sound path of the 60mm deep Φ1mm x 6mm short horizontal echo.

[0104] According to the sound path of the 20mm deep and 60mm deep target reflector echo, the measured refraction angle is calculated, and the calculation formula of the measured refraction angle is:

[0105]

[0106] In the formula, s H20 is the third workpiece sound path, s H60 is the fourth workpiece sound path, and B represents the measured refraction angle.

[0107] According to the selected refraction angle, the selected incidence angle is determined, and the calculation formula of the selected incidence angle is:

[0108]

[0109] In the formula, α represents the selected incidence angle, and β represents the selected refraction angle.

[0110] According to the wedge speed and the wedge angle in the wedge initial parameters, the test block speed, the test block speed, the selected incidence angle, and the measured refraction angle, the measured wedge speed, i.e. the wedge speed, is determined, and the calculation formula of the wedge speed is:

[0111]

[0112] In the formula, c1 represents the wedge speed, c2 represents the wedge speed in the wedge initial parameters, α0 represents the wedge angle in the wedge initial parameters, α represents the selected incidence angle, B represents the measured refraction angle, and C represents the wedge speed.

[0113] The wedge speed is automatically calculated by the operating instrument system, the new wedge parameters are input and confirmed to be saved. The new detection parameters are saved, and the workpiece speed is restored.

[0114] It should be noted that when the size and the sound speed parameter of the wedge are both unknown, calibrating the size of the wedge according to the wrong sound speed parameter will get the wrong result. Conversely, calibrating the sound speed of the wedge according to the wrong size parameter will also get the wrong result. Therefore, the standard test block is used to calibrate the overall parameters of the wedge, and the sound speed and the size of the wedge are calibrated at the same time.

[0115] In some embodiments of the present application, when the sound speed of the wedge is unknown and the size of the wedge is unknown, the one or more selected wave display angles determine the selected refraction angle, a plurality of different depth transverse hole reflectors are used to obtain different sound paths in the workpiece; and / or the horizontal distance from the probe front to the transverse hole is measured; the sound speed of the wedge and / or the size of the wedge are determined according to the standard test block sound speed, the initial parameters of the wedge and / or the horizontal distance, comprising:

[0116] The selected wave display angle determines the first selected refraction angle;

[0117] The probe is coupled to the short transverse hole echo of the preset standard test block at a plurality of different depths to obtain the fifth sound path in the workpiece and the sixth sound path in the workpiece of the short transverse hole echo;

[0118] The second selected refraction angle is determined by selecting the wave display angle again;

[0119] The probe is coupled to the short transverse hole echo of the preset standard test block at a plurality of different depths to obtain the seventh sound path in the workpiece and the eighth sound path in the workpiece of the short transverse hole echo;

[0120] The second horizontal distance and the third horizontal distance from the probe front to the transverse hole are measured respectively;

[0121] The sound speed of the wedge and the size of the wedge are determined according to the first selected refraction angle, the second selected refraction angle, the fifth sound path in the workpiece, the sixth sound path in the workpiece, the seventh sound path in the workpiece, the eighth sound path in the workpiece, the initial parameters of the wedge, the standard test block sound speed and the second horizontal distance and the third horizontal distance.

[0122] In some specific embodiments of the present application, when the sound speed of the wedge is unknown and the size of the wedge is unknown, the initial parameters of the wedge include the height of the wedge, the angle of the wedge, the sound speed of the wedge and the front distance of the wedge, the sound speed of the workpiece is set as the standard test block sound speed, the detection depth range is set as 120mm, and the angle range is set as the using angle range.

[0123] The selected wave display angle is 35°, i.e. the first selected refraction angle is determined.

[0124] The probe is coupled to the Φ1mm×6mm short transverse hole echo of 20mm depth of the CS-III standard test block, the probe is moved to make the reflector echo maximum, and the sensitivity is adjusted in time to make the echo unsaturated. The fifth sound path in the workpiece of the Φ1mm×6mm short transverse hole echo of 20mm depth is read out by the gate.

[0125] Couple the probe to the 60mm deep Φ1mm x 6mm short lateral hole echo of the CS-III standard block, move the probe to maximize the reflector echo, and pay attention to adjust the sensitivity in time to keep the echo unsaturated. Lock in the readout of the sixth workpiece sound path of the 60mm deep Φ1mm x 6mm short lateral hole echo by using the gate.

[0126] Select the angle of the waveform display again, i.e. determine the second selected refraction angle, to be 65°.

[0127] Couple the probe to the 20mm deep Φ1mm x 6mm short lateral hole echo of the CS-III standard block, move the probe to maximize the reflector echo, and pay attention to adjust the sensitivity in time to keep the echo unsaturated. Lock in the readout of the seventh workpiece sound path of the 20mm deep Φ1mm x 6mm short lateral hole echo by using the gate.

[0128] Couple the probe to the 60mm deep Φ1mm x 6mm short lateral hole echo of the CS-III standard block, move the probe to maximize the reflector echo, and pay attention to adjust the sensitivity in time to keep the echo unsaturated. Lock in the readout of the eighth workpiece sound path of the 60mm deep Φ1mm x 6mm short lateral hole echo by using the gate.

[0129] Measure the second horizontal distance from the probe front to the 60mm deep Φ1mm x 6mm short lateral hole by using a steel ruler, and input the value into the instrument manually.

[0130] The calculation formula of the first actual incident zero sound path error and the second actual incident zero sound path error according to the sound path ratio of the 20mm deep and 60mm deep target reflector echoes is:

[0131]

[0132]

[0133] In the formula, s1 represents the first actual incident zero sound path error, s2 represents the second actual incident zero sound path error, s 1H20 represents the fifth workpiece sound path, s 1H60 represents the sixth workpiece sound path, s 2H20 represents the seventh workpiece sound path, and s 2H60 represents the eighth workpiece sound path.

[0134] Determine the first measured refraction angle according to the fifth workpiece sound path and the sixth workpiece sound path, and determine the second measured refraction angle according to the seventh workpiece sound path and the eighth workpiece sound path. The calculation formula of the first measured refraction angle and the second measured refraction angle is:

[0135]

[0136]

[0137] wherein s 1H20 represents the fifth workpiece sound path, s 1H60 represents the sixth workpiece sound path, s 2H20 represents the seventh workpiece sound path, s 2H60 represents the eighth workpiece sound path, B1 represents the first measured refraction angle, and B2 represents the second measured refraction angle.

[0138] The first selected incidence angle is determined according to the first selected refraction angle, the wedge sound speed in the wedge initial parameters and the test block sound speed, and the second selected incidence angle is determined according to the second selected refraction angle, the wedge sound speed in the wedge initial parameters and the test block sound speed, and the calculation formula of the first selected incidence angle and the second selected incidence angle is:

[0139]

[0140]

[0141] wherein α1 represents the first selected incidence angle, β1 represents the first selected incidence angle, α2 represents the second selected incidence angle, β2 represents the second selected incidence angle, c1 represents the wedge sound speed, and c2 represents the test block sound speed.

[0142] The wedge angle calculation formula is:

[0143] A0 = cos -1 v

[0144] wherein A0 represents the wedge angle, and v is an intermediate variable.

[0145] The calculation formula of the intermediate variable v is:

[0146]

[0147] wherein A0 represents the wedge angle, B1 represents the first measured refraction angle, B2 represents the second measured refraction angle, α1 represents the first selected incidence angle, α2 represents the second selected incidence angle, α0 represents the wedge angle in the wedge initial parameters, c2 represents the test block sound speed, and c1 represents the wedge sound speed in the wedge initial parameters.

[0148] The wedge sound speed is determined according to a plurality of intermediate variables, and the expression of the plurality of intermediate variables is:

[0149]

[0150]

[0151]

[0152]

[0153] In the formula, z, u, y, x, v represent intermediate variables.

[0154] The wedge sound velocity calculation formula is:

[0155]

[0156] In the formula, C represents the wedge sound velocity.

[0157] The second measured incident angle calculation formula is:

[0158] A2 = sin -1 (y)

[0159] In the formula, A2 represents the second measured incident angle, and y is an intermediate variable.

[0160] The wedge height calculation formula is:

[0161]

[0162] In the formula, C represents the wedge sound velocity, c2 represents the test block sound velocity, c1 represents the wedge sound velocity in the wedge initial parameter, h represents the wedge height in the wedge initial parameter, s2 represents the second actual incident zero path error, A2 represents the second measured incident angle, α2 represents the second selected incident angle, and H represents the height of the wedge.

[0163] The wedge front distance calculation formula is:

[0164] L = 60 * tanB2 + H * tanA2 - l 2H60

[0165] In the formula, H represents the height of the wedge, A2 represents the second measured incident angle, B2 represents the second measured refraction angle, and l 2H60 represents the second horizontal distance.

[0166] The wedge sound velocity, the wedge angle, the height of the wedge, and the wedge front distance are automatically calculated by operating the instrument system, new wedge parameters are input and confirmed to be saved. The new detection parameters are saved, and the workpiece sound velocity is restored.

[0167] In some embodiments of the present application, the wedge initial parameters include the wedge height, the wedge angle, and the wedge sound velocity.

[0168] In some embodiments of the present application, the wedge initial parameters include the wedge height, the wedge angle, the wedge sound velocity, and the wedge front distance.

[0169] In some embodiments of the present application, the wedge size includes the wedge height, the wedge angle, and the wedge front distance.

[0170] In some embodiments of the present application, the selected refraction angle is 45 degrees.

[0171] In some embodiments of the application, the first selected refraction angle is 35 degrees and the second selected refraction angle is 65 degrees.

[0172] The wedge parameter calibration method of the phased array ultrasound wedge provided by the embodiment can be used to calibrate the size of the wedge when the speed of the wedge is known and the size of the wedge is unknown, to calibrate the speed of the wedge when the speed of the wedge is unknown and the size of the wedge is known, and to calibrate the size and the speed of the wedge when the speed of the wedge is unknown and the size of the wedge is unknown. The wedge parameters are calibrated by using a limited number of independent positioning measurement data, so that all detection data can be calibrated.

[0173] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer readable storage medium. The computer readable storage medium includes a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.

[0174] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A method for calibrating phased array ultrasonic wedge parameters, characterized in that, The method comprises: setting the workpiece sound velocity as the standard block sound velocity, setting the wedge initial parameters, and setting the fan-shaped scanning strategy; selecting the refraction angle according to the wave form display angle, and obtaining different workpiece internal sound paths by using a plurality of standard blocks with different depth transverse hole reflectors; and measuring the horizontal distance from the probe front to the transverse hole; determining the sound velocity of the wedge and the size of the wedge according to the standard block sound velocity, the wedge initial parameters, and the horizontal distance; when the sound velocity of the wedge is unknown and the size of the wedge is unknown: selecting the refraction angle according to the wave form display angle, and obtaining different workpiece internal sound paths by using a plurality of standard blocks with different depth transverse hole reflectors; and / or measuring the horizontal distance from the probe front to the transverse hole; determining the sound velocity of the wedge and / or the size of the wedge according to the standard block sound velocity, the wedge initial parameters, and / or the horizontal distance, comprising: selecting the first selected refraction angle according to the wave form display angle; coupling the probe to the short transverse hole echoes of the preset standard block at different depths to obtain the fifth workpiece internal sound path and the sixth workpiece internal sound path of the short transverse hole echoes; selecting the second selected refraction angle according to the wave form display angle again; coupling the probe to the short transverse hole echoes of the preset standard block at different depths to obtain the seventh workpiece internal sound path and the eighth workpiece internal sound path of the short transverse hole echoes; measuring the second horizontal distance and the third horizontal distance from the probe front to the transverse hole respectively; determining the sound velocity of the wedge and the size of the wedge according to the first selected refraction angle, the second selected refraction angle, the fifth workpiece internal sound path, the sixth workpiece internal sound path, the seventh workpiece internal sound path, the eighth workpiece internal sound path, the wedge initial parameters, the standard block sound velocity, and the second horizontal distance and the third horizontal distance.

2. The method of claim 1, wherein, The method further comprises correction of the zero delay parameter, and the determination of the zero delay parameter comprises: setting the workpiece sound velocity as the standard block sound velocity, setting the initial zero delay, and setting the wedge to be not used; obtaining different workpiece internal sound paths by using a plurality of standard blocks with different depth transverse hole reflectors; determining the zero delay according to the standard block sound velocity, the initial zero delay, and the different workpiece internal sound paths.

3. The method of claim 1, wherein, The wedge initial parameters comprise the wedge height, the wedge angle, the wedge sound velocity, and the wedge front distance.

4. The method of claim 1, wherein, The size of the wedge comprises the wedge height, the wedge angle, and the wedge front distance.

5. The method of claim 1, wherein, The first selected refraction angle is 35 degrees, and the second selected refraction angle is 65 degrees.

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