WO2017111418A1 - 균열 측정 장치 및 방법 - Google Patents
균열 측정 장치 및 방법 Download PDFInfo
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- WO2017111418A1 WO2017111418A1 PCT/KR2016/014906 KR2016014906W WO2017111418A1 WO 2017111418 A1 WO2017111418 A1 WO 2017111418A1 KR 2016014906 W KR2016014906 W KR 2016014906W WO 2017111418 A1 WO2017111418 A1 WO 2017111418A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/221—Arrangements for directing or focusing the acoustical waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2437—Piezoelectric probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/051—Perpendicular incidence, perpendicular propagation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/052—Perpendicular incidence, angular propagation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/055—Angular incidence, perpendicular propagation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/056—Angular incidence, angular propagation
Definitions
- the present application relates to an apparatus and method for detecting cracks generated in a structure.
- a general method of detecting cracks generated in a structure by using ultrasonic waves is to enter an ultrasonic wave into the structure to be inspected and to receive a reflected wave to detect the crack.
- a crack measuring apparatus that can more accurately measure the information on the crack, including the vertical crack.
- a crack measuring method that can more accurately measure the information on the crack, including the vertical crack.
- a crack measuring apparatus focuses on a bottom surface of an inspection object, irradiates first ultrasonic waves in a direction perpendicular to the bottom surface of the inspection object, and receives an reflected wave reflected from the bottom surface of the inspection object. It includes a monitoring unit for providing information about the crack based on the intensity of the reflected wave.
- the ultrasonic sensor of the crack measuring apparatus includes a plurality of piezoelectric elements arranged in a concave structure, the transmitter for irradiating the first ultrasonic wave, the receiver for receiving the reflected wave, and the transmitter and the receiver It may include a partition disposed between and having a sound absorbing property.
- Crack measurement apparatus may further include a moving unit for moving the ultrasonic sensor two-dimensionally on the surface of the inspection object, and outputs the position information indicating the position of the ultrasonic sensor to the monitoring unit. have.
- the monitoring unit of the crack measuring apparatus may visually display a two-dimensional distribution of cracks of the test object by using the intensity of the reflected wave and the position information.
- the moving part of the crack measuring apparatus may be attached to the test object or a structure supporting the test object.
- the crack measuring apparatus further includes a ferromagnetic material attaching the moving part to the test object or the structure for supporting the test object, or is adsorbed to the test object or the structure for supporting the test object in a vacuum manner, thereby moving the moving part.
- the apparatus may further include an adsorber attached to the test object or the structure for supporting the test object, or may be fastened to the test object or the structure for supporting the test object by a mechanical fastening method to move the moving part to the test object or the test object. It may further include a bolt attached to the supporting structure.
- the crack measuring apparatus may further include a contact medium supply device for supplying a contact medium between the ultrasonic sensor and the test object.
- the contact medium supply device of the crack measuring apparatus is a tank for storing the contact medium, a pump for continuously supplying the contact medium, the contact medium supplied from the pump is installed with the ultrasonic sensor It may include a tube for transporting to the position, and a nozzle installed in the ultrasonic sensor for spraying the contact medium carried through the tube.
- the ultrasonic sensor of the crack measuring apparatus diffuses toward the bottom of the test object, additionally transmits a second ultrasound in a direction acute to the bottom of the test object, and the second ultrasound is The diffraction wave diffracted by the crack can be received.
- the monitoring unit of the crack measuring apparatus may extract information on the height of the crack by using the time when the diffraction wave is received, and provide information on the height of the crack.
- the ultrasonic sensor of the crack measuring apparatus is a first transmitter for transmitting the first ultrasound, the second transmitter is disposed spaced apart from the first transmitter, and the second transmitter for transmitting the second ultrasound, and the It may include a receiver arranged to correspond to the first transmitter and receiving the reflected wave and the diffraction wave.
- the ultrasonic sensor of the crack measuring apparatus may further receive a diffraction wave diffracted by the crack of the first ultrasonic wave.
- the ultrasonic sensor of the crack measuring apparatus is disposed to correspond to the transmitter for transmitting the first ultrasonic wave, the first receiver for receiving the reflected wave, and is spaced apart from the transmitter It may include a second receiver for receiving the diffraction wave.
- the method of measuring cracks focuses on the bottom of the test object, irradiating a first ultrasonic wave in a direction perpendicular to the bottom of the test object, receiving a reflected wave reflected from the bottom of the test object, and Providing information about the crack based on the strength of the reflected wave.
- Providing the information of the crack measuring method according to an exemplary embodiment of the present invention may visually display two-dimensional information about the distribution of the cracks of the test object.
- a step of spreading toward the bottom of the test object and irradiating a second ultrasound in an acute angle with the bottom of the test object, and the second ultrasound is applied to the crack And receiving the diffracted wave diffracted by the method.
- Providing the information of the crack measuring method according to an embodiment of the present invention may further provide information on the height of the crack by using the time when the diffraction wave is received.
- Crack measurement method may further comprise the step of receiving the diffraction wave diffracted by the first ultrasonic wave by the crack.
- the distribution of defects can be easily known, and the vertical crack can be detected regardless of the direction of the crack distribution, thereby easily confirming the two-dimensional vertical crack distribution. Can visualize the distribution of vertical cracks.
- FIG. 1 is a view for explaining the principle of the crack measuring apparatus and the crack measuring method according to an embodiment of the present invention.
- FIG. 2 is a view showing two-dimensionally the amplitude of the reflected wave detected by the ultrasonic sensor according to the position of the ultrasonic sensor as color information.
- Figure 3 schematically shows an ultrasonic sensor according to an embodiment of the present invention.
- FIG. 4 is a schematic view showing a crack measuring apparatus according to an embodiment of the present invention.
- FIG 5 schematically shows an ultrasonic sensor according to an embodiment of the present invention.
- FIG. 6 schematically illustrates a structure of a transmitter for irradiating ultrasonic waves in an ultrasonic sensor according to an embodiment of the present invention shown in FIG. 5.
- the blast furnace steel shell which is a large, high-temperature, high-pressure container made of thick plates, has a number of holes processed for supplying cooling water to the cooling mechanism, and there are various stress concentrations.
- the mechanical load is applied by the internal high heat, internal fuel, and gas pressure. This is working in various ways vertical cracks are generated in various directions. In a structure made of a thick material such as a thick plate, cracks generated on one side are often unidentifiable on the opposite side, and in particular, cracks are often grown from the inner side due to internal reducing gas and high heat. .
- Figure 1 is a view for explaining the principle of the crack measuring apparatus and the crack measuring method according to an embodiment of the present invention
- Figure 2 is a two-dimensional color information of the amplitude of the reflected wave detected by the ultrasonic sensor according to the position of the ultrasonic sensor It is a figure shown.
- FIG. 1 illustrates a case where an ultrasonic sensor irradiates ultrasonic waves to a normal region (that is, a region where a crack does not exist) of the test object
- FIG. 1 (b) illustrates a region where vertical cracks exist on the test object. It shows the case in which the ultrasonic sensor irradiates ultrasonic waves.
- the hatched portion indicated by an oblique line represents a region to which ultrasonic waves are irradiated.
- the ultrasonic beam when the ultrasonic beam is vertically irradiated so that the ultrasonic beam is focused on the rear or bottom surface, that is, the surface opposite to the surface where the ultrasonic sensor is located on the inspection object, the reflected signal is received at a narrow area of the rear surface. can do.
- the ultrasonic sensor receives the ultrasonic wave having a high amplitude.
- the ultrasonic sensor receives ultrasonic waves of low amplitude.
- the ultrasonic wave focused by the ultrasonic sensor is irradiated perpendicularly to the structure, and the amplitude of the reflected wave received by the ultrasonic sensor according to the two-dimensional position of the ultrasonic sensor is represented using color information.
- a two-dimensional distribution of cracks as shown in 2 can be obtained.
- Figure 3 schematically shows an ultrasonic sensor according to an embodiment of the present invention
- Figure 3 (a) is a front view of the ultrasonic sensor
- Figure 3 (b) shows a side view of the ultrasonic sensor, respectively.
- the ultrasonic sensor 100 may include a transmitter 110, a receiver 120, and a partition wall 130.
- the transmitter 110 may include a plurality of piezoelectric elements 111.
- the ultrasound sensor 100 may be in contact with one surface of the test object and irradiate ultrasound so that the ultrasound is focused on the other surface of the test object, and irradiate the ultrasound in a direction perpendicular to the other surface of the test object.
- the ultrasonic sensor 100 may have a flat surface in contact with one surface of the test object.
- Each of the plurality of piezoelectric elements 111 generates ultrasonic waves.
- the plurality of piezoelectric elements 111 may be disposed in a concave structure inside the ultrasonic sensor 100 while forming a sensor array. That is, according to one embodiment of the present invention, the plurality of piezoelectric elements 111 are arranged in a concave structure inside the ultrasonic sensor 100, so that ultrasonic waves may be physically focused on the other surface of the test object.
- the ultrasonic sensor 100 may have a transmission / reception type structure. That is, the ultrasonic sensor 100 may include a transmitter 110, a receiver 120 separated from the transmitter 110, and a partition wall 130 disposed between the transmitter 110 and the receiver 120.
- the transmitter 110 may transmit focused ultrasound. Specifically, when the ultrasonic sensor 100 is disposed in contact with the surface of the test object, the transmitter 110 may transmit the ultrasound focused on the bottom of the test object.
- the transmitter 110 may include a plurality of piezoelectric elements 111 arranged in a concave structure as shown in FIG. 3A.
- the receiver 120 receives the reflected wave reflected from the bottom of the test object.
- the partition 130 has a sound absorbing property. That is, the ultrasonic wave generated by the transmitter 110 has a sound absorption property so that the receiver 120 is not received.
- the ultrasonic sensor 100 may prevent the surface reflection wave from being received by the receiver 120 due to the presence of the partition wall 130. Therefore, the ultrasound sensor 100 may be disposed at a distance close to the surface of the test object. For example, the ultrasound sensor 100 may be disposed to contact the surface of the test object.
- the ultrasonic sensor 100 according to the exemplary embodiment of the present invention shown in FIG. 3 obtains the focusing effect without applying the method of immersion and easily receives the bottom reflected wave signal without a large distance between the sensor and the test object, such as a water distance. Can be. Therefore, the ultrasonic sensor 100 according to the exemplary embodiment of the present invention may detect cracks in the test object even when the test object is large and difficult to apply in the waterjet.
- Figure 4 schematically shows a crack measuring apparatus according to an embodiment of the present invention, the crack measuring apparatus according to an embodiment of the present invention, the ultrasonic sensor 100, the moving unit 200, and the monitoring unit 300 It may include.
- the ultrasonic sensor 100 is in contact with one surface of the test object, irradiates ultrasound waves focused on the other surface of the test object in a direction perpendicular to the other surface of the test object, receives reflected waves reflected from the other surface of the test object, and receives the received reflected waves. Output a detection signal corresponding to
- the moving unit 200 moves the ultrasonic sensor 100 in two axes on one surface of the test object, and outputs a position signal indicating the position of the ultrasonic sensor 100.
- the moving unit 200 may output the position signal as a biaxial coordinate value of the ultrasonic sensor 100.
- the moving unit 200 may move by hand in a manual manner and output a position signal which is a coordinate value of the ultrasonic sensor 100, and automatically all or the other surface of the test object using various driving forces such as a step motor, a DC motor, and the like.
- the ultrasonic sensor 100 may be moved so that a portion is scanned by the ultrasonic sensor 100.
- the moving unit 200 may be attached to a test object or a structure supporting the test object.
- the moving unit 200 may include a ferromagnetic material, or may include an adsorber that adsorbs in a vacuum manner.
- the moving part 200 may be attached to a test object or a structure supporting the test object through a mechanical fastening method using a bolt or the like.
- the monitoring unit 300 inputs a detection signal from the ultrasonic sensor 100, inputs a position signal from the moving unit 200, and then, based on the detection signal and the position signal, whether a crack exists in the test object. And / or the location of the cracks and the like. For example, the monitoring unit 300 extracts an amplitude value of the bottom reflection wave signal reflected from the bottom surface of the inspection object from the detection signal, and displays the value on two-dimensional coordinates determined according to the position signal, thereby causing a crack distribution. Can be displayed in the form of a two-dimensional distribution image.
- the method of obtaining a two-dimensional image from the received signal may be implemented by a method of obtaining an amplitude image of a general ultrasonic C-scan method.
- the crack measuring apparatus may be implemented to be portable by using a battery as a power source.
- the crack measurement apparatus may further include a contact medium supply device for continuously supplying a contact medium between the ultrasonic sensor 100 and the test object.
- the contact medium supply device may include a tank containing the contact medium, a pump for continuously supplying the contact medium, and a tube for receiving the contact medium and spraying the ultrasonic sensor 100 and the test object.
- the ultrasonic sensor 100 may be provided with a nozzle connected to the tube. That is, in order to detect cracks and the like using the ultrasonic sensor 100, a contact medium is required.
- the crack measuring apparatus according to an embodiment of the present invention further includes the above-described contact medium supply device, thereby providing an ultrasonic sensor 100 and Contact media can be supplied between the test subjects.
- the contact medium may be a liquid such as water.
- an air layer is formed between the ultrasonic sensor 100 and the contact surface of the test object by thickly and evenly applying a gel-type general ultrasonic contact medium (couplant) to the surface of the test object without supplying a contact medium separately. You can prevent it from happening.
- a gel-type general ultrasonic contact medium couplant
- FIG. 5 schematically illustrates an ultrasonic sensor according to an embodiment of the present invention, in which the ultrasonic sensor 100-1 includes a first sensor 160 and a second sensor 170. can do.
- the first sensor 160 generates the first ultrasound focused on the bottom surface of the test object.
- the first ultrasound may be irradiated perpendicular to the bottom of the test object.
- the function and operation of the first sensor 160 will be easily understood with reference to the description of FIGS. 1 to 3.
- the second sensor 170 may transmit a second ultrasonic wave that spreads widely to the tip of the vertical crack.
- the second ultrasound may be irradiated to form an acute angle with the bottom of the test object. That is, the direction of the second ultrasonic waves transmitted by the second sensor 170 may be close to the focal direction of the first sensor 160, but the second ultrasonic waves may have a sufficiently wide spread to the tip of the crack.
- the second sensor 170 may not receive the second ultrasound, but may only receive a component diffracted by the crack of the first ultrasound emitted by the first sensor 160.
- both the first sensor 160 and the second sensor 170 may include a transmitter for generating ultrasonic waves and a receiver for receiving reflected waves reflected from the bottom of the test object.
- one of the first sensor 160 and the second sensor 170 may include only a transmitter and may not include a receiver.
- one of the first sensor 160 and the second sensor 170 may include only the receiver and may not include the transmitter.
- a partition having sound absorbing properties may be disposed between the transmitter and the receiver in the first sensor 160 and / or the second sensor 170.
- the first sensor 160 and the second sensor 160 may be coupled to each other. That is, the ultrasonic sensor according to an embodiment of the present invention may be implemented in a form including a first transmitter for generating the above-described first ultrasonic wave, a second transmitter for generating the above-mentioned second ultrasonic wave, and one receiver. have. In this case, a partition wall may be disposed between the first transmitter and the second transmitter and the receiver.
- the second sensor 170 may be used to measure the height of the vertical crack.
- the second sensor 170 irradiates the second ultrasonic waves. Thereafter, the first sensor 160 receives the crack, in particular the wave diffracted at the tip of the crack, and the arrival time of the second ultrasonic wave and detects the arrival time, and calculates the position of the crack tip from the arrival time, thereby detecting the height of the crack. Can be.
- the first sensor 160 transmits the first ultrasonic waves
- the second sensor 170 receives a component in which the wave diffracted at the crack, in particular the crack tip, propagates in the oblique direction toward the second sensor 170.
- the height of the crack can be detected by detecting the arrival time, calculating the position of the crack tip from the arrival time.
- FIG. 6 schematically illustrates a structure of a transmitter for irradiating ultrasonic waves in an ultrasonic sensor according to an embodiment of the present invention shown in FIG. 5, wherein the ultrasonic sensor 100-1 according to an embodiment of the present invention is a first transmitter.
- the first transmitter 161 irradiates the first ultrasound focused on the bottom of the test object perpendicularly to the bottom of the test object.
- the first transmitter 161 may be configured as an array type transmitter in which a plurality of piezoelectric elements are concave.
- the second transmitter 171 irradiates a second ultrasonic wave in a spread form to form an acute angle with the bottom surface of the test object. As shown in FIG. 6, the second transmitter 171 may be spaced apart from the first transmitter 161 and disposed at an inclination angle.
- the ultrasonic sensor 100-1 shown in FIGS. 5 and 6 performs two transmission and reception alternately to acquire two-dimensional distribution of vertical cracks and height information of cracks, and visually display two-dimensional distribution of vertical cracks. can do.
- the first ultrasound is irradiated by the first transmitter 161 and the first receiver (not shown) corresponding to the first transmitter 161 receives the reflected wave reflected from the bottom surface of the test object
- the second transmitter 171 waits and the inspection by the first transmitter 161 and the first receiver (not shown) is completed and the first ultrasound is extinguished
- the second transmitter 171 irradiates the second ultrasound
- a first receiver (not shown) corresponding to the first transmitter 161 may receive the diffracted ultrasound wave at the tip of the crack.
- the first receiver (not shown) may be disposed adjacent to the first transmitter 161, and a partition wall may be disposed between the first receiver and the first transmitter.
- a second receiver (not shown) corresponding to the second transmitter 171 may receive the diffracted ultrasound wave at the tip of the crack. That is, while the first sensor including the first transmitter 161 and the first receiver (not shown) operates, the second sensor including the second receiver (not shown) may also operate.
- the second receiver may be disposed spaced apart from the first sensor including the first transmitter 161 and the first receiver (not shown), and may be disposed to form an acute angle with the bottom surface of the test object.
- the ultrasonic sensor detects the distribution of cracks regardless of the distribution direction of the cracks by using a first ultrasonic wave focused on the bottom of the test object and irradiated perpendicularly to the bottom of the test object. can do.
- a first ultrasonic wave focused on the bottom of the test object and irradiated perpendicularly to the bottom of the test object.
- an error may be large in detecting the height of the crack. Therefore, by using a first ultrasound irradiated in a diffuse form, irradiated with an acute angle with the bottom of the test object, or by receiving a diffracted ultrasound in a direction acute with the bottom of the test object, it is possible to more accurately determine the height of the cracks Can be.
- the height of the crack can be more accurately determined by updating the diffraction wave component with the highest amplitude.
- the diffraction wave component can be easily obtained from the crack tip. From this, it is possible to acquire not only the two-dimensional distribution of the cracks but also information about their height.
- the crack height information of the line spanning each horizontal line and the vertical line can be represented by X-X 'cross-section and Y-Y' cross-section in the form of a two-dimensional cross section. .
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Abstract
Description
Claims (17)
- 검사 대상체의 저면에 집속되며, 검사 대상체의 저면에 수직 방향으로 제1 초음파를 조사하고, 상기 제1 초음파가 검사 대상체의 저면에서 반사된 반사파를 수신하며, 상기 검사 대상체의 저면으로 갈수록 확산되며, 상기 검사 대상체의 저면과 예각을 이루는 방향으로 제2 초음파를 송신하고, 상기 제2 초음파가 균열에 의해 회절된 회절파를 수신하는 초음파 센서;상기 반사파의 세기에 기초하여 균열의 존재 여부 및 위치에 대한 정보를 추출하여 제공하고, 상기 회절파가 수신되는 시간을 이용하여 상기 균열의 높이에 대한 정보를 추출하고, 상기 균열의 높이에 대한 정보를 제공하는 모니터링부를 포함하는 균열 측정 장치.
- 제1항에 있어서, 상기 초음파 센서는오목 구조로 배치된 복수개의 압전 소자들을 포함하여 상기 제1 초음파를 조사하는 송신기;상기 반사파를 수신하는 수신기; 및상기 송신기와 상기 수신기 사이에 배치되고 흡음 성질을 가지는 격벽을 포함하는 균열 측정 장치.
- 제1항에 있어서, 상기 균열 측정 장치는상기 초음파 센서를 상기 검사 대상체의 표면에서 2차원적으로 움직이며, 상기 초음파 센서의 위치를 나타내는 위치 정보를 상기 모니터링부로 출력하는 이동부를 더 포함하는 균열 측정 장치.
- 제3항에 있어서, 상기 모니터링부는상기 반사파의 세기와 상기 위치 정보를 이용하여 상기 검사 대상체의 균열의 2차원적 분포를 가시적으로 표시하는 균열 측정 장치.
- 제3항에 있어서, 상기 이동부는상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 부착되는 균열 측정 장치.
- 제5항에 있어서, 상기 균열 측정 장치는상기 이동부를 상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 부착하는 강자성체를 더 포함하는 균열 측정 장치.
- 제5항에 있어서, 상기 균열 측정 장치는진공 방식으로 상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 흡착되어 상기 이동부를 상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 부착하는 흡착기를 더 포함하는 균열 측정 장치.
- 제5항에 있어서, 상기 균열 측정 장치는기계적 체결 방법을 통해 상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 체결되어 상기 이동부를 상기 검사 대상체 또는 상기 검사 대상체를 지지하는 구조물에 부착하는 볼트를 더 포함하는 균열 측정 장치.
- 제1항에 있어서, 상기 균열 측정 장치는상기 초음파 센서와 상기 검사 대상체 사이에 접촉 매질을 공급하는 접촉 매질 공급 장치를 더 포함하는 균열 측정 장치.
- 제9항에 있어서, 상기 접촉 매질 공급 장치는상기 접촉 매질을 보관하는 탱크;상기 접촉 매질을 연속으로 공급하는 펌프;상기 펌프로부터 공급된 상기 접촉 매질을 상기 초음파 센서가 설치된 위치까지 운반하는 튜브; 및상기 튜브를 통해 운반된 상기 접촉 매질을 분사하며, 상기 초음파 센서에 설치된 노즐을 포함하는 균열 측정 장치.
- 제1항에 있어서, 상기 초음파 센서는상기 제1 초음파를 송신하는 제1 송신기;상기 제1 송신기와 이격되어 배치되고, 상기 제2 초음파를 송신하는 제2 송신기; 및상기 제1 송신기에 대응되도록 배치되고, 상기 반사파 및 상기 회절파를 수신하는 수신기를 포함하는 균열 측정 장치.
- 검사 대상체의 저면에 집속되며, 상기 검사 대상체의 저면에 수직 방향으로 제1 초음파를 조사하고, 상기 제1 초음파가 검사 대상체의 저면에서 반사된 반사파 및 상기 제1 초음파가 균열에 의해 회절된 회절파를 수신하는 초음파 센서; 및상기 반사파의 세기에 기초하여 균열의 존재 여부 및 위치에 대한 정보를 추출하여 제공하고, 상기 회절파가 수신되는 시간을 이용하여 상기 균열의 높이에 대한 정보를 추출하고, 상기 균열의 높이에 대한 정보를 제공하는 모니터링부를 포함하는 균열 측정 장치.
- 제12항에 있어서, 상기 모니터링부는상기 회절파가 수신되는 시간을 이용하여 상기 균열의 높이에 대한 정보를 추출하고, 상기 균열의 높이에 대한 정보를 제공하는 균열 측정 장치.
- 제12항에 있어서, 상기 초음파 센서는상기 제1 초음파를 송신하는 송신기;상기 송신기에 대응되도록 배치되며, 상기 반사파를 수신하는 제1 수신기; 및상기 송신기와 이격되어 배치되며, 상기 회절파를 수신하는 제2 수신기를 포함하는 균열 측정 장치.
- 검사 대상체의 저면에 집속되며, 검사 대상체의 저면에 수직 방향으로 제1 초음파를 조사하는 단계;상기 제1 초음파가 검사 대상체의 저면에서 반사된 반사파를 수신하는 단계;상기 반사파의 세기에 기초하여 균열의 존재 여부 및 상기 균열의 위치에 대한 정보를 추출하여 제공하는 단계;상기 검사 대상체의 저면으로 갈수록 확산되며, 상기 검사 대상체의 저면과 예각을 이루는 방향으로 제2 초음파를 조사하는 단계;상기 제2 초음파가 상기 균열에 의해 회절된 회절파를 수신하는 단계; 및상기 회절파가 수신되는 시간을 이용하여 상기 균열의 높이에 대한 정보를 추출하여 제공하는 단계를 포함하는 균열 측정 방법.
- 제15항에 있어서, 상기 정보를 제공하는 단계는상기 검사 대상체의 상기 균열의 분포에 대한 2차원적 정보를 가시적으료 표시하는 균열 측정 방법.
- 검사 대상체의 저면에 집속되며, 검사 대상체의 저면에 수직 방향으로 제1 초음파를 조사하는 단계;상기 제1 초음파가 검사 대상체의 저면에서 반사된 반사파를 수신하는 단계;상기 반사파의 세기에 기초하여 균열의 존재 여부 및 상기 균열의 위치에 대한 정보를 추출하여 제공하는 단계;상기 제1 초음파가 상기 균열에 의해 회절된 회절파를 수신하는 단계; 및상기 회절파가 수신되는 시간을 이용하여 상기 균열의 높이에 대한 정보를 추출하여 제공하는 단계를 더 포함하는 균열 측정 방법.
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US12072315B2 (en) | 2020-03-30 | 2024-08-27 | Verifi Technologies, Llc | System and method for real-time visualization of defects in a material |
US11650183B2 (en) | 2020-03-30 | 2023-05-16 | Verifi Technologies, Llc | System and method for real-time degree of cure evaluation in a material |
US11860131B2 (en) * | 2020-03-30 | 2024-01-02 | Verifi Technologies, Llc | System and method for portable ultrasonic testing |
US12055519B2 (en) | 2020-03-30 | 2024-08-06 | Verifi Technologies, Llc | System and method for real-time visualization of foreign objects within a material |
US11686707B2 (en) | 2020-03-30 | 2023-06-27 | Verifi Technologies, Llc | System and method for real-time visualization of defects in a material |
US11726065B2 (en) | 2020-03-30 | 2023-08-15 | Verifi Technologies, Llc | System and method for real-time visualization of defects in a material |
US11754529B2 (en) | 2020-03-30 | 2023-09-12 | Verifi Technologies, Llc | System and method for evaluating defects in a material |
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US20190004013A1 (en) | 2019-01-03 |
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KR101736641B1 (ko) | 2017-05-17 |
CN108431593A (zh) | 2018-08-21 |
EP3396369A1 (en) | 2018-10-31 |
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