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1. 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

2. 发明专利

JP2004333166A Recrystallization ratio measuring device, and method for measuring recrystallization ratio 有权
公开(公告)号：JP2004333166A
公开(公告)日：2004-11-25
申请号：JP2003125558
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 measuring device, and a method for measuring a recrystallization ratio, in which the recrystallization ratio of the subject matter can be measured by hot on-line.
SOLUTION: A head part 30 radiates a line focus beam to a subject 2 to be measured to generate lateral waves polarized in a rolling direction or lateral waves polarized in a width direction inside. A second laser beam is introduced to a prescribed position in the subject 2 where the lateral waves reach, and the second laser beam that is reflected is taken. A computer 70 determines transmission time of the lateral waves based on waveform data representing frequency change of the second laser beam detected by an interferometer 50, and determines sound speed of the lateral waves based on the transmission time. Using sound speed parameters obtained from sound speed of each lateral wave, a recrystallization ratio of the subject 2 is obtained based on data representing relation between the recrystallization ratio for the same steel kind as that of the subject 2 and the sound speed parameter memorized in a memory part in the computer 70.
COPYRIGHT: (C)2005,JPO&NCIPI

3. 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

4. 发明专利

JP2005300356A Method and apparatus for measuring diameter distribution of crystal grain 有权
标题翻译：用于测量晶粒直径分布的方法和装置
公开(公告)号：JP2005300356A
公开(公告)日：2005-10-27
申请号：JP2004117106
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 , G01N29/20
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus, capable of high precision measurement of the diameter distribution of crystal grains, even if the measurable frequency band of ultrasonic waves is restricted.
SOLUTION: Ultrasonic waves are generated in an object to be measured made of a polycrystalline material, and attenuation factor of the ultrasonic waves is measured, to acquire observed attenuation factor. The attenuation factor of ultrasonic waves is theoretically computed, on the basis of an assumed diameter distribution of crystal grains to acquire the theoretical attenuation factor. The observed attenuation factor is compared with the theoretical attenuation factor, and the diameter distribution of crystal grains of the object to be measured is determined based on the comparison results.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：即使限制了超声波的可测量频带，也提供了能够高精度地测量晶粒的直径分布的方法和装置。解决方案：在由多晶材料制成的被测物体中产生超声波，并测量超声波的衰减系数，以获得观察到的衰减因子。理论上计算超声波的衰减系数，根据晶粒的假定直径分布来获得理论衰减因子。将观测到的衰减因子与理论衰减因子进行比较，并根据比较结果确定待测物体的晶粒直径分布。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004333169A Crystal grain aspect ratio measuring device, and crystal grain aspect ratio measuring method 有权
公开(公告)号：JP2004333169A
公开(公告)日：2004-11-25
申请号：JP2003125702
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 , B21C51/00 , G01N29/18
摘要： PROBLEM TO BE SOLVED: To provide a crystal grain aspect ratio measuring device capable of measuring 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 or lateral waves polarized in a width direction inside, and introduces a second laser beam to a second prescribed position in the subject 2 to which each lateral wave reaches to obtain the second laser beam reflected. A computer 70 determines transmission time for the lateral waves based on waveform data representing frequency change of the second laser beam detected by an interferometer 50, and determines sound speed of the lateral wave based on the transmission time. Using sound speed parameters from sound speed of the respective lateral waves, a crystal grain aspect ratio for the subject 2 is obtained based on data representing relation between a crystal grain aspect ratio for the same steel kind as that of the subject 2 and the sound speed parameter memorized in a memory part in the computer 70. COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2004333165A Ultrasonic measuring apparatus using optical fiber 有权
公开(公告)号：JP2004333165A
公开(公告)日：2004-11-25
申请号：JP2003125542
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： G01B9/02 , G01H9/00
摘要： PROBLEM TO BE SOLVED: To implement an apparatus for measuring various ultrasonic waves through the use of the Doppler shift effect which is not affected by oscillations from the outside and does not require adjustments of a special optical element. SOLUTION: The ultrasonic measuring apparatus comprises a condensing lens for condensing scattering light generated by a laser beam irradiated to an object to be measured; an optical fiber provided with both a partial reflecting mirror at its tip for receiving the incidence of the scattering light from the condensing lens and a partial reflecting mirror in the rear; a Doppler shift sensor having a high-frequency photo-detector for detecting interference light which has passed through the optical fiber; and a controller provided with a control circuit for altering the shape of a piezoelectric element wound on the peripheral surface of the optical fiber, so that the high-frequency photo-detector of the Doppler shift sensor can sense the interference light in an optimum condition. COPYRIGHT: (C)2005,JPO&NCIPI

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

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