WO2015099229A1 - 강판 결함 검출을 위한 초음파 탐상 장치 및 방법 - Google Patents
강판 결함 검출을 위한 초음파 탐상 장치 및 방법 Download PDFInfo
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- WO2015099229A1 WO2015099229A1 PCT/KR2013/012207 KR2013012207W WO2015099229A1 WO 2015099229 A1 WO2015099229 A1 WO 2015099229A1 KR 2013012207 W KR2013012207 W KR 2013012207W WO 2015099229 A1 WO2015099229 A1 WO 2015099229A1
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- medium
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- flaw detection
- injection
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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
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
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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
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
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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
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2632—Surfaces flat
Definitions
- the present invention relates to an ultrasonic flaw detection apparatus and an ultrasonic flaw detection method for detecting an internal defect of a produced steel sheet.
- Ultrasonic inspection is performed on the correction line before shipment of the produced product to detect internal defects of the finished steel sheet.
- Ultrasonic flaw detection is a method of diagnosing the presence of defects such as cracks, inclusions, and segregation in the steel sheet by transmitting ultrasonic waves to the steel sheet to receive and analyze ultrasonic waves reflected from the steel sheet.
- Ultrasonic flaw detection can be classified into a contact flaw detection method and a non-contact flaw detection method depending on the presence or absence of contact between the ultrasonic probe and the surface of the steel sheet.
- the method of contact through the non-contact inspection method has been considered from various angles.
- a contact medium is required in order to transmit the ultrasonic energy generated by the ultrasonic probe to the steel sheet, and water may be excellent as the representative medium.
- 1 shows a submerged ultrasonic flaw detection method among the steel sheet defect detection method using a non-contact ultrasonic flaw detection method.
- the steel plate 3 is deposited in a water-filled water tank 1, and ultrasonic inspection is performed on the upper portion of the steel plate 3 using the immersion ultrasonic probe 2. According to this, since the entire steel plate 3 is deposited in water, there is an advantage that it is possible to maintain a consistent ultrasonic transmission and reception efficiency at all times even when the ultrasonic probe 2 moves.
- the large water tank 1 for depositing the steel plate 5 transferred through the roll 4 and the steel plate 5 in the water tank 1 are placed up and down.
- Up and down moving device (5) for moving is required, for this purpose there is a problem that requires a large-scale construction to structurally change the facilities of the steelworks correction line.
- the waterjet method is a method of spraying water on a steel sheet to secure a vertical downward channel, and then transmit and receive ultrasonic waves through the channel.
- Such a waterjet method does not need to deposit the entire steel plate in the water tank, so there is an advantage in that the implementation of the facility is easier than that of the water immersion ultrasonic scanning method.
- a water storage roll 6 is installed in front of and behind the ultrasonic transducer 2 along the longitudinal direction of the steel plate 3, and water is supplied through the nozzle 7 and the water supply pipe 8 to supply a predetermined amount. After the water is stored, ultrasonic inspection is performed on the upper part of the steel sheet 3. In this case, even if the steel sheet is transferred, there is an advantage that the ultrasonic flaw detection through the rotation of the water storage roll (6).
- the present invention is to solve the above problems, after forming a medium (water) column in the lower portion of the steel sheet to transmit and receive the ultrasonic wave through the medium column is capable of stable ultrasonic transmission and reception, the ultrasonic flaw detection apparatus that can recover and reuse the medium And an ultrasonic flaw detection method.
- the present invention is installed on the lower side of the steel sheet being transported and the injection nozzle for spraying the medium toward the steel sheet to form a medium pillar, and installed inside the injection nozzle, the steel sheet through the medium pillar
- An ultrasonic flaw detection apparatus including an ultrasonic probe for transmitting and receiving ultrasonic waves for defect detection, and a medium circulation unit for recovering a medium dropped from the medium column and circulating the sprayed nozzle to the spray nozzle.
- the medium circulation unit is installed on the outside of the injection nozzle, the medium receiving receiving the medium dropped from the medium column, and connected to the medium receiving, the medium in the medium receiving is It may have a configuration including a recovery pipe to be recovered, and a supply pipe for supplying the medium of the recovery pipe to the injection nozzle.
- the recovery pipe may be provided with a filter for filtering the medium discharged from the medium receiving.
- the ultrasonic flaw detector may further include an injection pressure control unit for supplying injection pressure to the injection nozzle and controlling the injection pressure of the injection nozzle.
- the injection pressure control unit may be installed between a supply pipe connected to the injection nozzle and a recovery pipe connected to a medium receiver installed on the outside of the injection nozzle.
- a circulation pump can be used as the injection pressure control unit.
- the injection pressure control unit includes a medium chamber for receiving the medium recovered by dropping from the medium column and resupplying the received medium to the injection nozzle, and the medium accommodated in the medium chamber. It may have a configuration including a surface height adjustment unit for controlling the injection pressure of the injection nozzle by adjusting the surface height of the.
- the surface height adjusting unit includes a level sensor for sensing the surface height of the medium accommodated in the medium chamber, a first pipe for supplying the medium to the medium chamber, and the medium chamber from the medium chamber.
- the control unit includes a supply chamber connected between the first and second pipes to receive a medium, a supply pump installed in the first pipe or the second pipe, and The first and second control valves installed in the first and second pipes, respectively, and a control unit for controlling the first and second control valves based on the sensing value of the level sensor.
- the injection pressure control unit a medium chamber for receiving the medium recovered by dropping from the medium column and resupply the received medium to the injection nozzle, and the height of the medium chamber; It may have a configuration including a chamber height adjusting unit for controlling the injection pressure of the injection nozzle by adjusting.
- the chamber height adjusting unit may have a configuration including a driving unit for driving and moving the medium chamber in an up and down direction, and a control unit for controlling the operation of the driving unit according to an input signal.
- the ultrasonic probes are arranged in plural along the width direction of the steel plate, and the injection nozzles can be configured to accommodate the array of transducers formed by the plurality of ultrasonic probes.
- the transducer array may have a length greater than the width of the steel sheet.
- the present invention provides a method for transporting a steel sheet, spraying a medium onto the steel sheet through an injection nozzle provided at a lower side of the steel sheet to form a media pillar, and operating the ultrasonic probe disposed in the spray nozzle to operate the media pillar.
- Disclosing an ultrasonic flaw detection method for detecting steel sheet defects comprising the step of detecting the internal defects of the steel sheet by transmitting and receiving the ultrasonic waves through the ultrasonic wave, and recovering the medium dropped from the medium column and re-supply to the injection nozzle.
- the upper surface of the column pillar is formed by forming the column pillar so that the medium column has a height higher than the distance between the injection port of the injection nozzle and the lower surface of the steel sheet during the injection of the medium. It can be in close contact with the bottom surface.
- the full length of the steel sheet can be inspected, and when the ultrasonic probe is configured in an array form, the full width of the steel sheet can be simultaneously detected.
- FIG. 1 is a conceptual diagram showing a submerged ultrasonic flaw detection method according to the prior art.
- FIG. 2 is a conceptual diagram showing an ultrasonic flaw detection method using a water jet method according to the prior art.
- FIG. 3 is a conceptual diagram of an ultrasonic flaw detector according to an embodiment of the present invention.
- FIG. 4 is a view showing a method for forming a medium pillar through the spray nozzle shown in FIG.
- 5 is a graph showing the results of the ultrasonic flaw detection associated with the present invention.
- FIG. 6 and 7 is a conceptual diagram showing a spray pressure control unit according to an embodiment of the present invention.
- FIGS. 6 and 7 are conceptual diagram showing the configuration of the control unit shown in FIGS. 6 and 7.
- 9 and 10 is a conceptual diagram showing a spray pressure control unit according to another embodiment of the present invention.
- FIG. 11 is a perspective view of the ultrasonic flaw detector according to another embodiment of the present invention.
- FIG. 12 is a plan view of the ultrasonic flaw detector shown in FIG. 11;
- FIG. 3 is a conceptual diagram of an ultrasonic flaw detector according to an embodiment of the present invention.
- the ultrasonic flaw detector includes a spray nozzle 110, an ultrasonic probe 120, and a medium circulation unit 130.
- the spray nozzle 110 is installed below the steel sheet 3 conveyed by a conveying means, for example, a roll 4, and sprays a medium (for example, water) toward the steel sheet 3 so that the medium pillar 10 is provided.
- a conveying means for example, a roll 4
- the medium pillar 10 may be formed to have a height of several tens of millimeters (mm) from the injection hole of the injection nozzle 110, which enables stable ultrasonic transmission and reception.
- the ultrasonic probe 120 is installed inside the injection nozzle 110 and transmits and receives ultrasonic waves for detecting defects of the steel sheet 3 through the medium pillar 10.
- the ultrasonic probe 120 is supported by a supporting structure inside the spray nozzle 110 and has a form of a immersed probe deposited by a medium.
- the ultrasonic probe 120 is connected to a data processing unit that processes and calculates an ultrasonic signal received from the steel sheet 3 and analyzes whether there is a defect in the steel sheet 3 through a wired or wireless connection.
- the ultrasonic probe 120 has a form in which a wireless communication module for wirelessly transmitting an ultrasonic signal to a data processor is included.
- the medium circulation unit 130 has a function of recovering the medium dropped from the medium column 10 and circulating the spray nozzle 110.
- the medium circulation unit 130 has a configuration including a medium receiving 131, a recovery pipe 132, and a supply pipe 133.
- the medium receiving 131 is installed outside the injection nozzle 110 and is configured to receive a medium dropped from the medium pillar 10.
- the medium receiver 131 may be formed in the form of a cylinder or a box defining the injection nozzle 110.
- the recovery pipe 132 is connected to the medium receiver 131 and is configured to recover the medium in the medium receiver 131.
- the medium falling from the medium column 10 and dropped into the medium receiving 131 is supplied to the recovery pipe 132.
- the recovery pipe 132 may be provided with a filter 134 for filtering the medium discharged from the medium receiving 131, through which the medium from which impurities are removed may be resupplied to the injection nozzle 110.
- the supply pipe 133 is for supplying a medium of the recovery pipe 132 to the injection nozzle 110 and communicates with the injection nozzle 110 and the recovery pipe 132, respectively.
- the ultrasonic flaw detector may include an injection pressure control unit 140 for supplying injection pressure to the injection nozzle 110 and controlling the injection pressure of the injection nozzle 110.
- the injection pressure control unit 140 may be installed between the supply pipe 133 and the recovery pipe 132, and the injection nozzle 110 may supply the medium at a predetermined pressure according to the pressure supply of the injection pressure control unit 140. By spraying, the medium pillar 10 is formed.
- a circulation pump may be used as the injection pressure control unit 140, and the injection pressure of the injection nozzle 110 may be controlled through the control of the circulation pump.
- FIG. 4 is a view illustrating a method for forming a medium pillar through the spray nozzle shown in FIG. 3.
- Figure 4 (a) shows the shape of the medium column 10 formed by the injection nozzle 110
- Figure 4 (b) is a medium column 10 formed by the injection nozzle 110 is a steel sheet (3) ) Is shown.
- the height h of the medium pillar 10 is preferably higher than the distance D between the injection hole of the injection nozzle 110 and the lower surface of the steel plate 3.
- the medium column 10 is formed by forming the medium column 10 such that the medium column 10 has a height h higher than the distance D between the injection port of the injection nozzle 110 and the lower surface of the steel plate 3. It may be in close contact with the steel plate 3, thereby enabling the formation of the medium pillar 10 for stable ultrasonic transmission and reception.
- the steel plate 3 which is a defect diagnosis object is transferred using the conveying means 4 (roller). Then, the medium is sprayed onto the steel sheet 3 through the spray nozzle 110 provided below the steel sheet 3 to form the medium pillar 10.
- the data processor processes the ultrasonic signal transmitted from the ultrasonic probe 120 to derive a result value.
- FIG. 5 illustrates a result of processing an ultrasonic signal related thereto.
- FIG. 5A illustrates an ultrasonic signal processing result of a steel sheet without internal defects
- FIG. 5B illustrates an ultrasonic signal processing result with an internal defect.
- the medium on which the medium column 10 is formed is dropped by its own weight, and the medium dropped by using the medium circulation unit 130 having the above-described configuration is recovered and resupplyed to the injection nozzle 110. Accordingly, the medium can be prevented from falling to the ground, and there is an advantage that the medium does not need to be continuously supplied from the outside during the ultrasonic flaw detection process.
- the circulation pump as the injection pressure control unit 140 as described above, below, the injection pressure of the injection nozzle 110 compared to the control method through the control of the circulation pump with reference to FIGS.
- the configuration of the injection pressure control unit 140 that can accurately control the will be described.
- FIG. 6 and 7 are conceptual views illustrating a spray pressure control unit according to an embodiment of the present invention.
- 6 illustrates an initial state in which the medium is not sprayed from the spray nozzle 110
- FIG. 7 illustrates a state in which the medium pillar 10 is formed by spraying the medium from the spray nozzle 100.
- the injection pressure control unit 140 of the present embodiment includes a medium chamber 150 and a surface height adjusting unit 160.
- the medium chamber 150 accommodates the medium recovered by falling from the medium column 10, and serves to supply the medium contained therein to the injection nozzle 110.
- the medium chamber 150 is connected to the recovery pipe 132 and the supply pipe 133 so that the medium can be circulated. That is, the medium chamber 150 is connected to the injection nozzle 110 by the supply pipe 133, and is connected to the medium receiving 131 by the recovery pipe 132. According to such a structure, the medium of the medium receiver 131 is supplied to the medium chamber 150 through the recovery pipe 132, and the medium of the medium chamber 150 is supplied to the injection nozzle 110 through the supply pipe 133. Supplied.
- the surface height adjusting unit 160 is configured to control the injection pressure of the injection nozzle 110 by adjusting the surface height a of the medium accommodated in the medium chamber.
- the surface height adjusting unit 160 has a configuration including a level sensor 161, first and second pipes 162 and 163, and a control unit 164.
- the level sensor 161 is installed in the medium chamber 150 and senses the surface height of the medium accommodated in the medium chamber 150.
- the first and second pipes 162 and 163 are connected to the medium chamber 150, respectively.
- the first pipe 162 is for supplying the medium to the medium chamber 150
- the second pipe 163 is for discharging the medium from the medium chamber 150.
- the control unit 164 is connected to the first and second pipes 162 and 163, and the first and second pipes 162 and 163 to have a specific value based on the sensing value of the level sensor 161. Control the media flow rate.
- the specific value is set based on the value entered by the user.
- the height H from the ground to the end of the medium of the spray nozzle 110 always corresponds to the height L from the ground to the surface of the medium in the medium chamber 150. If the medium surface height a in the medium chamber 150 changes, the height H of the medium end of the injection nozzle 100 also changes.
- the control unit 164 compares the set value input by the user with the sensing value of the level sensor 161 and controls the amount of the medium supplied to the medium chamber 150 and the amount of the medium discharged from the medium chamber 150 based on this. As a result, the height (a) of the surface of the medium in the medium chamber 150 is controlled. Accordingly, the height of the medium pillar 10 is adjusted to control the injection pressure.
- FIG. 8 is a conceptual diagram illustrating a configuration of the control unit shown in FIGS. 6 and 7.
- control unit 164 includes a supply chamber 171, a supply pump 172, first and second control valves 173 and 174, and a controller 174.
- the supply chamber 171 is connected between the first pipe 162 and the second pipe 163 and receives a medium for being recovered from the medium chamber 150 or supplied to the medium chamber 150.
- the supply pump 172 is installed in the first pipe 162 or the second pipe 163 to provide a transfer force for the transfer of the medium. This embodiment illustrates that the supply pump 172 is installed in the first pipe 162.
- the first and second control valves 173 and 174 are installed in the first and second pipes 162 and 163, respectively, and control opening and closing of the first and second pipes 162 and 163.
- the flow rate of the medium of the first and second pipes 162 and 163 is adjusted according to the operation of the first and second control valves 173 and 174.
- the controller 171 is connected to the level sensor 161 and controls the operation of the first and second control valves 173 and 174 based on the sensing value of the level sensor 161 and the user set value.
- control unit 164 The configuration of the control unit 164 described above is one example of various embodiments, if the configuration that can adjust the height (a) of the medium surface of the medium chamber 150 based on the sensing value of the level sensor 161 It can be implemented in any form.
- FIG. 9 and 10 are conceptual views illustrating a spray pressure control unit according to another embodiment of the present invention.
- 9 illustrates an initial state in which the medium is not sprayed from the spray nozzle 110
- FIG. 10 illustrates a state in which the medium pillar 10 is formed by spraying the medium from the spray nozzle 100.
- the injection pressure control unit 140 ′ has a configuration including a medium chamber 150 and a chamber height adjusting unit 180.
- the medium chamber 150 has the same configuration as the foregoing embodiment, the description thereof will be replaced with the foregoing description.
- the medium chamber 150 is configured to be movable in the vertical direction.
- a guide structure may be provided between the medium chamber 150 and the support structure to guide the vertical movement of the medium chamber 150.
- the supply pipe 133 and the recovery pipe 132 have a flexible material or be configured to be relatively movable with respect to the medium chamber 150 so as to enable vertical movement of the medium chamber 150.
- the chamber height adjusting unit 180 is configured to control the injection pressure of the injection nozzle 110 by adjusting the height C of the medium chamber 150.
- the chamber height adjusting unit 180 has a configuration including a driving unit 181 and a control unit 182.
- the driving unit 181 is for driving the medium chamber 150 in the vertical direction, and may be implemented in various configurations such as a linear motor, a ball screw, and a rack pinion.
- the controller 182 is configured to control the operation of the driver 181 according to the input signal.
- the operation of the driving unit 181 may be controlled so that the medium chamber 150 is located at a position set by the user based on a value input by the user.
- This embodiment uses the above-described matters, and when the position of the medium chamber 50 is raised to a certain height as shown in FIG. 10 in the initial state as shown in FIG. 9, the medium is sprayed from the injection nozzle 110 so that the water column 10 ).
- the control unit 182 may adjust the height of the medium chamber 150 through the operation control of the drive unit 181, and thus the height of the medium column 10 is adjusted to control the injection pressure.
- FIG. 11 is a perspective view of an ultrasonic flaw detector according to another embodiment of the present invention
- FIG. 12 is a plan view of the ultrasonic flaw detector shown in FIG. 11.
- the ultrasonic flaw detector according to the present embodiment also includes the injection nozzle 210, the ultrasonic probe 220, the medium circulation unit 230, the injection pressure supply unit 240, and the like as in the previous embodiment.
- the reference numerals of the components corresponding to the above embodiments are denoted by the same reference numerals as the previous embodiments. That is, in the previous embodiment, the reference numerals denoted by the 100th number are changed to the 200th number and marked.
- the ultrasonic transducers 220 are arranged in plural along the width direction of the steel plate 3 to form the transducer array 225.
- the transducer array 225 preferably has a length L equal to or greater than the width W of the steel plate 3.
- the spray nozzle 210 is formed to accommodate the transducer array 225, and in this embodiment, the spray nozzle 210 is formed to have a rectangular cross section having the width direction of the steel sheet 3 in the longitudinal direction.
- the medium receiving 231 also has a rectangular box shape that defines an outline of the injection nozzle 210.
- the shapes of the injection nozzle 210 and the medium receiving 231 illustrated in the present embodiment are not limited to those described above, but may be modified in various forms.
- the plurality of transducers 220 arranged along the width direction of the steel plate 3 covers the full width of the steel plate 3, the full width of the steel plate 3 when the steel plate 3 is transferred. There is an advantage that can simultaneously detect).
- the ultrasonic flaw detection apparatus and method for detecting steel sheet defects described above are not limited to the configuration and method of the above-described embodiments, and the above embodiments may be selectively combined with all or some of the embodiments so that various modifications may be made. And various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention.
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Abstract
Description
Claims (15)
- 이송 중인 강판의 하측에 설치되며, 상기 강판을 향해 매질을 분사하여 매질 기둥을 형성하는 분사 노즐;상기 분사 노즐의 내부에 설치되며, 상기 매질 기둥을 통해 강판의 결함 검출을 위한 초음파를 송수신하는 초음파 탐촉자; 및상기 매질 기둥에서 낙하한 매질을 회수하여 상기 분사 노즐로 순환시키는 매질 순환 유닛을 포함하는 초음파 탐상 장치.
- 제1항에 있어서, 상기 매질 순환 유닛은,상기 분사 노즐의 외곽에 설치되며, 상기 매질 기둥로부터 낙하한 매질을 받는 매질받이;상기 매질받이에 연결되며, 상기 매질받이 내의 매질이 회수되는 회수배관; 및상기 회수배관의 매질을 상기 분사 노즐에 공급하기 위한 공급배관을 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제2항에 있어서,상기 회수배관에는 상기 매질받이에서 배출된 매질을 필터링하기 위한 필터가 설치되는 것을 특징으로 하는 초음파 탐상 장치.
- 제1항에 있어서,상기 분사 노즐에 분사압을 공급함과 아울러 상기 분사 노즐의 분사압을 제어하기 위한 분사압 제어 유닛을 더 포함하는 것
- 제4항에 있어서,상기 분사압 제어 유닛은 상기 분사 노즐에 연결된 공급배관과 상기 분사 노즐의 외곽에 설치된 매질 받이에 연결된 회수배관의 사이에 설치되는 것
- 제4항에 있어서,상기 분사압 제어 유닛은 순환 펌프인 것을 특징으로 하는 초음파 탐상 장치.
- 제4항에 있어서, 상기 분사압 제어 유닛은,상기 매질 기둥에서 낙하하여 회수된 매질을 수용하고, 수용된 매질을 상기 분사 노즐로 재공급하기 위한 매질 챔버; 및상기 매질 챔버에 수용된 매질의 표면 높이를 조절하여 상기 분사 노즐의 분사압을 제어하는 표면 높이 조절부를 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제7항에 있어서, 상기 표면 높이 조절부는,상기 매질 챔버에 수용된 매질의 표면 높이를 센싱하는 레벨 센서;상기 매질 챔버로 매질을 공급하기 위한 제1배관;상기 매질 챔버로부터 매질을 배출시키기 위한 제2배관; 및상기 제1 및 제2배관에 연결되며, 레벨 센서의 센싱값을 근거로 상기 매질의 표면 높이가 특정값을 갖도록 상기 제1 및 제2배관의 매질 유량을 제어하는 제어유닛을 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제8항에 있어서, 상기 제어유닛은,상기 제1 및 제2배관 사이에 연결되며, 매질을 수용하는 공급챔버;상기 제1배관 또는 제2배관에 설치되는 공급펌프;상기 제1 및 제2배관에 각각 설치되는 제1 및 제2제어밸브; 및상기 레벨 센서의 센싱값을 근거로 상기 제1 및 제2제어밸브를 제어하는 제어부를 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제4항에 있어서, 상기 분사압 제어 유닛은,상기 매질 기둥에서 낙하하여 회수된 매질을 수용하고, 수용된 매질을 상기 분사 노즐로 재공급하기 위한 매질 챔버; 및상기 매질 챔버의 높이를 조절하여 상기 분사 노즐의 분사압을 제어하는 챔버 높이 조절부를 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제10항에 있어서, 상기 챔버 높이 조절부는,상기 매질 챔버를 상하 방향으로 구동하여 이동시키는 구동부; 및입력 신호에 따라 상기 구동부의 동작을 제어하는 제어부를 포함하는 것을 특징으로 하는 초음파 탐상 장치.
- 제1항에 있어서,상기 초음파 탐촉자는 상기 강판의 폭 방향을 따라 복수로 배열되며,상기 분사 노즐은 상기 복수의 초음파 탐촉자에 의해 형성된 탐촉자 어레이를 수용하도록 구성되는 것을 특징으로 하는 초음파 탐상 장치.
- 제12항에 있어서,상기 탐촉자 어레이는 상기 강판의 폭 이상의 길이를 갖는 것을 특징으로 하는 초음파 탐상 장치.
- 강판을 이송시키는 단계;상기 강판의 하측에 설치된 분사 노즐을 통해 상기 강판에 매질을 분사하여 매질 기둥을 형성하는 단계;상기 분사 노즐 내에 배치된 초음파 탐촉자를 가동하여 상기 매질 기둥을 통해 초음파를 송수신함으로써 상기 강판의 내부 결함을 검출하는 단계; 및상기 매질 기둥에서 낙하한 매질을 회수하여 상기 분사 노즐로 재공급하는 단계를 포함하는 초음파 탐상 방법.
- 제14항에 있어서,상기 매질의 분사시 상기 매질 기둥이 상기 분사 노즐의 분사구와 상기 강판의 하면 사이의 거리보다 높은 높이를 갖도록 상기 매질 기둥을 형성하는 것을 특징으로 하는 초음파 탐상 방법.
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EP13900485.7A EP3088883B1 (en) | 2013-12-23 | 2013-12-26 | Ultrasonic flaw detection apparatus and method for detecting flaw of steel plate |
JP2016560320A JP6220990B2 (ja) | 2013-12-23 | 2013-12-26 | 鋼板の欠陥検出のための超音波探傷装置および方法 |
CN201380081826.9A CN105849549B (zh) | 2013-12-23 | 2013-12-26 | 检测钢板缺陷的超声波检测设备和方法 |
US15/107,827 US10082487B2 (en) | 2013-12-23 | 2013-12-26 | Apparatus and method for ultrasonic detection to detect flaws of steel plate |
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KR1020130161414A KR20150073566A (ko) | 2013-12-23 | 2013-12-23 | 강판 결함 검출을 위한 초음파 탐상 장치 및 방법 |
KR1020130163517A KR101595492B1 (ko) | 2013-12-26 | 2013-12-26 | 강판 결함 검출을 위한 초음파 탐상 장치 |
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CN112432751B (zh) * | 2020-10-28 | 2022-07-26 | 华南理工大学 | 一种移动式动力检测的激振及其波射流传输检测装置 |
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US20160320345A1 (en) | 2016-11-03 |
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JP6220990B2 (ja) | 2017-10-25 |
JP2017502313A (ja) | 2017-01-19 |
US10082487B2 (en) | 2018-09-25 |
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