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1. 发明专利

JP2010230558A Laser ultrasonic inspection method using thermoelastic effect of laser pulse beam 审中-公开
标题翻译：使用激光脉冲光束的热敏效应的激光超声波检测方法
公开(公告)号：JP2010230558A
公开(公告)日：2010-10-14
申请号：JP2009079722
申请日：2009-03-27
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , HASHIGUCHI SHOHEI , RIN CHUN SU , OH KI JANG , PARK HYUN CHUL , KANG MYOUNG KOO , HUH HYEONG JUN
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To provide a laser ultrasonic inspection method for measuring ultrasonic waves at the optimal efficiency by increasing an ultrasonic signal strength at a measurement point as the ultrasonic waves are generated by using a thermoelastic effect for preventing a surficial damage from being generated.
SOLUTION: In the laser ultrasonic inspection method by using the pulse laser beam so as to generate the ultrasonic waves in a workpiece, a surface of the workpiece is irradiated with a plurality of pulse laser spots 3 triangularly or circularly arrayed, or a ring-like pulse laser spot. The ultrasonic waves are generated in the workpiece by the thermoelastic effect. The laser ultrasonic inspection method is provided, and characterized by measuring the ultrasonic waves in the center of a regular polygon, a circle or a ring, and using an ultrasonic superposition effect at the measurement point 10.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过在通过使用用于防止表面损伤的热弹性效应产生超声波的同时通过增加测量点处的超声波信号强度来以最佳效率测量超声波的激光超声波检查方法被生成。解决方案：在通过使用脉冲激光束以在工件中产生超声波的激光超声波检查方法中，工件的表面被三角形或圆形排列的多个脉冲激光点3照射，或者环状脉冲激光点。通过热弹性效应在工件中产生超声波。提供了激光超声波检查方法，其特征在于测量正多边形，圆形或环形的中心的超声波，并且在测量点10处使用超声波叠加效应。版权所有（C）2011 ，JPO＆INPIT

2. 发明专利

JP2004333175A Laser ultrasonic wave generating device by radiation of multiple beam 有权
公开(公告)号：JP2004333175A
公开(公告)日：2004-11-25
申请号：JP2003125874
申请日：2003-04-30
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , CHU WAN YAN , HON SUN TEKU , I ZE KYON , RIN CHUN SU
IPC分类号： G01N29/00 , H01S3/00 , H01S3/101
摘要： PROBLEM TO BE SOLVED: To execute high-temperature, moving body, and nondestructive defect inspection by radiating a laser beam to a subject to generate ultrasonic waves, and contactlessly performing ultrasonic inspection using an optical interferometer.
SOLUTION: This device is a combined lens mechanism provided with a pulse Nd-YAG laser (pulsed Nd-YAG laser) to generate the laser beam, and a number of beam branching mechanisms to separate one high-output laser beam into multiple beams, in which distance between the laser beams and radiation cross sectional area of radiation of each laser beam can be freely adjusted. By separating one laser beam into multiple beams to be radiated to the subject, high-intensity multiple pulse laser ultrasonic waves are generated at the subject in this laser ultrasonic wave generating device by radiation of multiple beams.
COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2011257365A Ultrasonic measuring device and ultrasonic measuring method 有权
标题翻译：超声波测量装置和超声波测量方法
公开(公告)号：JP2011257365A
公开(公告)日：2011-12-22
申请号：JP2010134278
申请日：2010-06-11
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： HASHIGUCHI SHOHEI , NAGATA YASUAKI , CHUN SU LING , PARK HUN CHU , MINKU KANG , O KIJYAN , HU HYUN JIN
IPC分类号： G01N29/00 , G01N21/00
摘要： PROBLEM TO BE SOLVED: To provide an ultrasonic measuring device using a Fabry-Perot interferometer capable of stable measurement with high sensitivity using a resonator medium that has birefringence with a different refractive index depending on a polarization direction such as a polarization holding optical fiber, and to provide an ultrasonic measuring method.SOLUTION: An ultrasonic measuring device comprises a light switch 4 that switches between signal light i.e. reflected laser beams from a measuring object and stabilized light branched from laser beams for irradiating the measuring object, allowing the light to be input to a Fabry-Perot interferometer 6. An output from the interferometer 6 is inputted to a sample holding part 7 through a photodetector. The sample holding part 7 directly outputs the input from the photodetector during a period that the stabilized light is inputted to the interferometer 6 and sample-holds a value inputted before the input to the interferometer is switched from the stabilized light to the signal light, while outputting at a holding level during a period that the signal light is inputted to the interferometer.
摘要翻译：要解决的问题：提供一种使用法布里 - 珀罗干涉仪的超声波测量装置，其能够使用具有取决于诸如偏振保持光学器件的偏振方向的折射率具有不同折射率的双折射的谐振器介质，以高灵敏度进行稳定测量纤维，并提供超声波测量方法。解决方案：超声波测量装置包括：光开关4，其在来自测量对象的信号光即反射激光束之间切换，以及从用于照射测量对象的激光束分支的稳定光，允许光输入到法布里 - 珀罗干涉仪6.来自干涉仪6的输出通过光电检测器输入到样品保持部分7。样品保持部7在将稳定光输入到干涉仪6的期间直接输出来自光电检测器的输入，并且在输入到干涉仪的输入之前输入的值被采样保持在稳定的光到信号光的同时在将信号光输入到干涉仪的期间，以保持电平进行输出。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2004333174A Recrystallization ratio/aspect ratio measuring device, and recrystallization ratio/aspect ratio measuring method 审中-公开
公开(公告)号：JP2004333174A
公开(公告)日：2004-11-25
申请号：JP2003125854
申请日：2003-04-30
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , CHU WAN YAN , HON SUN TEKU , I ZE KYON , RIN CHUN SU
IPC分类号： G01N29/00 , G01N29/18
摘要： PROBLEM TO BE SOLVED: To provide a recrystallization ratio/aspect ratio measuring device capable of measuring a recrystallization ratio and a crystal grain aspect ratio of a subject by hot on-line. SOLUTION: A head part 30 radiates a line focus beam to the subject 2 to generate lateral waves polarized in a rolling direction and lateral waves polarized in a width direction inside, and introduces a second laser beam to a prescribed position in the subject 2 where each lateral wave reaches to obtain the second data reflected. A computer 70 determines squared integrated values of sound speed and waveform amplitude for the respective lateral waves based on waveform data representing frequency change of the second laser beam detected by an interferometer 50 to determine sound speed parameters and damping ratio parameters. Using the sound speed parameters and the damping ratio parameters, a recrystallization ratio and the crystal grain aspect ratio of the subject 2 are determined based on first data and second data for the same steel kind as that of the subject 2 memorized in a memory part in the computer 70. The recrystallization ratio and the crystal grain aspect ratio of the subject can thus be determined by hot on-line. COPYRIGHT: (C)2005,JPO&NCIPI

5. 发明专利

JP2012220221A Measuring method of poison ratio and measuring apparatus 有权
标题翻译：测定比例和测量装置的测量方法
公开(公告)号：JP2012220221A
公开(公告)日：2012-11-12
申请号：JP2011083174
申请日：2011-04-04
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , YAMADA HIROHISA , HASHIGUCHI SHOHEI , LIM CHOONG SOO , O KIJYAN , PARK HUN CHU , MINKU KANG , HU HYUN JIN
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To provide a measuring method of poison ratio utilizing ultrasonic excitation caused by thermo-elastic effects, with which the surface of an object to be examined is prevented from being damaged and no laser irradiated mark is generated in a laser ultrasonic method, and a measuring apparatus.SOLUTION: A measuring method of poison ratio includes generating an ultrasonic wave by irradiating an object to be examined with pulse oscillation laser light for ultrasonic wave generation, further, irradiating the object to be examined with laser light for ultrasonic detection having a wavelength different from that of the pulse oscillation laser light for ultrasonic wave generation, calculating a strength waveform of ultrasonic waves generated in the object to be examined utilizing the laser light for ultrasonic detection Doppler-shifted by vibration of ultrasonic waves generated in the object to be examined, performing frequency analysis on the strength waveform of ultrasonic waves, calculating a frequency of board ultrasonic waves in Si mode of which the group velocity is zero generated in the object to be examined and a resonant frequency of longitudinal waves, and calculating a poison ratio from the calculated frequency of board ultrasonic waves in the Si mode of which the group velocity is zero and the calculated resonant frequency of the longitudinal waves.
摘要翻译：要解决的问题：提供利用由热弹性效应引起的超声波激励的毒物比率的测量方法，通过该测量方法可以防止待检测物体的表面被损坏，并且不会产生激光照射标记激光超声波方法和测量装置。解决方案：毒物比率的测量方法包括通过用用于超声波产生的脉冲振荡激光照射被检查物体来产生超声波，此外，用具有波长的超声波检测的激光照射被检查物体不同于用于超声波产生的脉冲振荡激光的超声波生成的超声波的强度波形，使用在被检体中产生的超声波的振动多普勒超声波检测用激光进行计测。对超声波的强度波形进行频率分析，计算被检体内产生的组速度为零的Si模式的板超声波的频率和纵波的共振频率，计算毒性比计算出的超声波在Si模式下的频率为gr oup速度为零，并且计算出纵波的共振频率。版权所有（C）2013，JPO＆INPIT

6. 发明专利

JP2010071888A Method and device for measuring acoustic velocity of longitudinal wave and transverse wave in material by laser ultrasonic method 有权
标题翻译：通过激光超声波测量材料中纵横波和横波的声速的方法和装置
公开(公告)号：JP2010071888A
公开(公告)日：2010-04-02
申请号：JP2008241558
申请日：2008-09-19
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , HASHIGUCHI SHOHEI , RIN CHUN SU , OH KI JANG , PARK HYUN CHUL , KANG MYOUNG KOO , HUH HYEONG JUN
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To reduce damage of an inspecting object by laser beam irradiation in a laser ultrasonic detector, and to measure the acoustic velocity of a longitudinal wave and transverse wave. SOLUTION: The laser ultrasonic detector 10c includes: a laser light source 11 for generating ultrasonic wave for irradiating the inspecting object with a pulse laser beam for generating ultrasonic wave to generate plate wave; a laser light source 12 for detecting ultrasonic wave for irradiating the inspecting object with a laser beam for detecting ultrasonic wave to detect the plate wave; a diffraction grating 14 for irradiating the surface of the inspecting object with diffracted light by diffracting the pulse laser beam for generating ultrasonic wave; a calculation section 61 for symmetrical-wave plate wave frequency to calculate the frequency of asymmetrical-wave plate wave by frequency-analyzing the plate wave generated by irradiation of the diffracted light; a calculation section 62 for symmetrical-wave plate wave frequency to calculate the frequency of symmetrical-wave plate wave by frequency-analyzing the plate wave generated by direct irradiation of the laser beam for generating ultrasonic wave; a calculation section 63 for transverse and longitudinal-wave acoustic velocity to calculate longitudinal wave acoustic velocity and transverse wave acoustic velocity corresponding to respective calculated values. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：通过激光超声波检测器中的激光束照射来减少检查对象的损伤，并测量纵波和横波的声速。解决方案：激光超声波检测器10c包括：激光光源11，用于产生用于产生超声波以产生平板波的脉冲激光束照射检查对象的超声波; 用于检测超声波的激光光源12，用于用用于检测超声波的激光束照射检查对象以检测平板波; 衍射光栅14，用于通过衍射用于产生超声波的脉冲激光束来用检测对象的表面照射衍射光; 通过对通过衍射光的照射产生的平板波进行频率分析来计算对称波片波频率的计算部61，计算非对称波片波的频率; 通过频率分析由用于产生超声波的激光束的直接照射产生的平板波来计算对称波板波频率的计算部分62; 用于横波和纵波声速的计算部分63，用于计算对应于各个计算值的纵波声速和横波声速。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JP2006084932A Optical fiber transmission apparatus for high power laser beam 审中-公开
标题翻译：用于大功率激光束的光纤传输装置
公开(公告)号：JP2006084932A
公开(公告)日：2006-03-30
申请号：JP2004271241
申请日：2004-09-17
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , CHOI SEN GA , HON SUN TEKU , I ZE KYON , RIN CHUN SU
IPC分类号： G02B6/42 , G02B6/28 , H04B10/00
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for transmitting a high power laser beam which can not be transmitted only by one optical fiber, through a plurality of optical fibers. SOLUTION: The optical fiber transmission apparatus for transmitting the high power laser beam through the plurality of optical fibers is provided with one or more beam splitters (4) for dividing intensity of the high power laser beam (1), a composite lens constituted of a beam homogenizer (5) for making the intensity distribution of the laser beam uniform and a diffraction lens (6) for converging the single beam into a plurality of spots, and an optical fiber alignment part for efficiently making a plurality of divided laser beams projected from the composite lens incident on individual optical fibers, and each laser beam is made to pass through its corresponding composite lens to be divided and then the divided laser beams are made incident on the plurality of optical fibers (7, 15). COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种通过多根光纤传输仅由一根光纤不能透射的高功率激光束的装置。解决方案：用于通过多根光纤传输高功率激光束的光纤传输装置设置有一个或多个用于分割高功率激光束（1）的强度的分束器（4），复合透镜由用于使激光束的强度分布均匀的光束均化器（5）和用于将单个光束会聚到多个光斑中的衍射透镜（6）构成，以及用于有效地制造多个分割激光器入射到各个光纤上的从复合透镜投影的光束，使每个激光束通过其对应的复合透镜进行分割，然后分割的激光束入射到多个光纤（7,15）上。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2006084392A Online crystal grain diameter measuring device, and measuring method using laser ultrasonic wave 有权
标题翻译：在线晶体尺寸测量装置和使用激光超声波的测量方法
公开(公告)号：JP2006084392A
公开(公告)日：2006-03-30
申请号：JP2004271305
申请日：2004-09-17
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , CHOI SEN GA , HON SUN TEKU , I ZE KYON , RIN CHUN SU
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To provide a device and a method measuring a crystal grain diameter of a steel plate online by adapting a laser ultrasonic wave method in a production line of the steel plate. SOLUTION: The online crystal particle grain diameter measuring device is composed of: a pulse light emitting laser, a laser for ultrasonic measurement, an optical fiber 33, and an optical fiber 41; an optical head 70 irradiating a light beam of the pulse light emitting laser on a surface of a measuring object to generate an ultrasonic wave, irradiating a light beam of the laser for ultrasonic measurement transmitted by the optical fiber 33 to the same position as a generating position of the ultrasonic wave, collecting scattered light reflected by a reflected ultrasonic wave of the ultrasonic wave, and sending it into the optical fiber 41; an ultrasonic stable measuring part provided with a confocal Fabry-Perot interferometer and a high speed shutter to detect intensity change of the scattered light transmitted by the optical fiber 41 and measure strength of the reflected ultrasonic wave; and a signal processing part calculating the crystal grain diameter from an electrical output signal of the ultrasonic stable measuring part. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过在钢板的生产线中采用激光超声波法来提供在线测量钢板的晶粒直径的装置和方法。在线晶粒度测量装置由脉冲发光激光器，超声波测量用激光器，光纤33和光纤41构成。光头70将脉冲发光激光的光束照射在测量对象的表面上以产生超声波，将由光纤33传输的用于超声波测量的激光束照射到与产生的相同位置超声波的位置，收集由超声波的反射超声波反射的散射光，并将其发送到光纤41中; 具有共焦法布里 - 珀罗干涉仪和高速快门的超声波稳定测量部件，用于检测由光纤41发射的散射光的强度变化并测量反射的超声波的强度; 以及从所述超声波稳定测量部的电输出信号计算所述晶粒直径的信号处理部。版权所有（C）2006，JPO＆NCIPI

9. 发明专利

JP2005300346A Method and apparatus for separately measuring rate of recrystallization and aspect ratio of crystal grain 有权
标题翻译：分离测定晶粒重构速率和高度比例的方法和装置
公开(公告)号：JP2005300346A
公开(公告)日：2005-10-27
申请号：JP2004116948
申请日：2004-04-12
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , LEE CHAN SUN , HON SUN TEKU , RIN CHUN SU , I ZE KYON
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To perform an online separate measurement on a rate of recrystallization and the aspect ratio of crystal grains of an object to be measured hot online.
SOLUTION: A head part 30 irradiates the object to be measured 2 with a line focus beam to generate transverse waves polarized in the direction of rolling or transverse waves polarized, in the width direction inside and introduces a second laser beam to a prescribed location in the object to be measured 2, to acquire a second laser beam reflected there. A computer 70 computes the acoustic velocity of the transverse waves, on the basis of waveform data on the second laser beam detected by an interferometer 50 and compares the temperature measured by a temperature sensor 80 with a prescribed temperature. The computer 70 computes the rate of recrystallization, when the measured temperature is equal to the prescribed temperature or higher and the aspect ratio of crystal grains, when the measured temperature is lower than the prescribed temperature on the basis of data indicating the relations among the rates of recrystallization, the aspect ratios of crystal grains, and acoustic velocity parameters previously prepared through the use of acoustic velocity parameters, acquired on the basis of the acoustic velocity of each transverse waves.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：对在线测量的待测物体的晶粒的再结晶速率和晶粒长宽比进行在线分离测量。解决方案：头部30用线聚焦光束照射待测对象物2，以在宽度方向内产生沿着滚动方向偏振的横波或者在宽度方向上偏振的横波，并将第二激光束引入规定的要测量的对象2中的位置，以获取在那里反射的第二激光束。计算机70基于由干涉仪50检测的第二激光束上的波形数据计算横波的声速，并将由温度传感器80测量的温度与规定温度进行比较。当测量温度低于规定温度时，当测量温度等于规定温度或更高时，计算机70计算再结晶速率和晶粒长宽比，基于表示速率之间的关系的数据基于每个横波的声速获得的再结晶长宽比和通过使用声速参数预先制备的声速参数的声速比。版权所有（C）2006，JPO＆NCIPI

10. 发明专利

JP2010071886A Laser ultrasonic detector, and laser ultrasonic detection method 有权
标题翻译：激光超声波检测器和激光超声检测方法
公开(公告)号：JP2010071886A
公开(公告)日：2010-04-02
申请号：JP2008241528
申请日：2008-09-19
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HAMADA NAOYA , YAMADA HIROHISA , HASHIGUCHI SHOHEI , RIN CHUN SU , OH KI JANG , PARK HYUN CHUL , KANG MYOUNG KOO , HUH HYEONG JUN
IPC分类号： G01N29/00 , G01N29/04 , G01N29/44
摘要： PROBLEM TO BE SOLVED: To improve the detection performance in a laser ultrasonic detector. SOLUTION: This laser ultrasonic detector includes: a laser light source 11 for generating ultrasonic wave; a laser light source 12 for detecting ultrasonic wave; a reflected light from an inspecting object; a Fabry-Perot interferometer 13; a detector for detecting an output from the Fabry-Perot interferometer of the reflected light; a resonance length control section; and a laser driving control section 50 for periodically varying the resonance length and driving a pulse laser light source for generating ultrasonic wave synchronously with the periodic variation. The driving control section for laser drives the pulse laser light source for generating ultrasonic wave synchronously with predetermined timings of a rising slope and falling slope of a part of a laser beam for generating ultrasonic wave having transmitted through the Fabry-Perot interferometer, and takes difference between the amount of transmitted light corresponding to the rising slope and the amount of transmitted light corresponding to the falling slope detected by the detector. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提高激光超声波检测器的检测性能。解决方案：该激光超声波检测器包括：用于产生超声波的激光光源11; 用于检测超声波的激光光源12; 来自检查对象的反射光; 法布里 - 珀罗干涉仪13; 用于检测来自法布里 - 珀罗干涉仪的反射光的输出的检测器; 谐振长度控制部; 以及激光驱动控制部50，用于周期性地改变谐振长度，并驱动与周期性变化同步的用于产生超声波的脉冲激光光源。用于激光的驱动控制部分驱动用于产生超声波的脉冲激光光源，用于产生具有透射通过法布里 - 珀罗干涉仪的超声波的激光束的一部分的上升斜率和下降斜率的预定定时，并且差异在与检测器检测到的对应于下降斜率的上升斜率相对应的透射光量与透射光量之间。版权所有（C）2010，JPO＆INPIT

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