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1. 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

2. 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

3. 发明专利

JP2010071884A 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：JP2010071884A
公开(公告)日：2010-04-02
申请号：JP2008241501
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 linearly irradiating the inspecting object with a pulse laser beam for generating ultrasonic wave to generate the ultrasonic 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 ultrasonic 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 asymmetrical wave frequency to calculate the frequency of asymmetrical-wave plate wave by frequency-analyzing the ultrasonic wave generated by irradiation of the diffracted light; a calculation section 62 for a longitudinal wave acoustic velocity to calculate the longitudinal wave acoustic by frequency-analyzing the ultrasonic wave generated by linear irradiation of the pulse laser beam for generating ultrasonic wave; and a calculation section 63 for transverse wave acoustic velocity to calculate the frequency of the asymmetrical-wave plate wave and the transverse wave acoustic velocity corresponding to the longitudinal wave acoustic velocity.
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的脉冲激光束线性照射检查对象的超声波，以产生超声波; 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超声波; 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; 用于通过频率分析由衍射光照射产生的超声波来计算非对称波片频率的非对称波频率的计算部分61; 用于通过频率分析由用于产生超声波的脉冲激光束的线性照射产生的超声波来计算纵波声速的计算部分62; 以及用于计算对应于纵波声速的非对称波片波的频率和横波声速的横波声速的计算部63。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2012189574A Measuring device, measuring method and program 有权
标题翻译：测量装置，测量方法和程序
公开(公告)号：JP2012189574A
公开(公告)日：2012-10-04
申请号：JP2011234170
申请日：2011-10-25
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIGUCHI SHOHEI , KUNINAGA MANABU , ISHIYAMA OSAMU , SHINOHARA TAKASHI
IPC分类号： G01N27/72
摘要： PROBLEM TO BE SOLVED: To achieve more accurate measurement of mass percent of a magnetic component in a magnetic particulate than ever before without making complicated adjustments of a specimen.SOLUTION: A measuring device includes: a calibration curve storing part 613 for storing a calibration curve that shows a relationship between an apparent susceptibility of a magnetic particulate and bulk density of a magnetic component in the magnetic particulate; an apparent susceptibility calculation part 612 for calculating the apparent susceptibility of the magnetic particulate based on inductance acquired by an inductance acquisition part 611; a first bulk density calculation part 614 for using the calibration curve to calculate the bulk density of the magnetic component in the magnetic particulate from the apparent susceptibility of the magnetic particulate; a second bulk density calculation part 616 for calculating the bulk density of the magnetic particulate based on empty weight of a retaining cylinder, its total weight and its inner volume; and a magnetic component mass percent calculation part 617 for calculating a mass percent of the magnetic component in the magnetic particulate based on the bulk density of the magnetic component in the magnetic particulate and the bulk density of the magnetic particulate.
摘要翻译：要解决的问题：为了更准确地测量磁性颗粒中的磁性组分的质量百分数，而不进行复杂的样品调整。解决方案：测量装置包括：校准曲线存储部分613，用于存储示出磁性颗粒的表观磁敏度和磁性组分的体积密度之间的关系的校准曲线; 用于计算基于由电感获取部件611获取的电感的磁性颗粒的表观磁敏度的表观磁敏度计算部分612; 第一体积密度计算部614，用于使用校准曲线从磁性颗粒的表观磁敏度计算磁性颗粒中的磁性成分的体积密度; 第二堆积密度计算部分616，用于基于保持筒的空重计算其磁性颗粒的体积密度，其总重量和其内部体积; 以及磁性部件质量百分比计算部617，用于基于磁性粒子中的磁性成分的体积密度和磁性粒子的体积密度来计算磁性粒子中的磁性成分的质量百分比。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2011133338A Method and device for measuring poisson's ratio 有权
标题翻译：用于测量POISSON比率的方法和装置
公开(公告)号：JP2011133338A
公开(公告)日：2011-07-07
申请号：JP2009292780
申请日：2009-12-24
申请人： Nippon Steel Corp , Posco , ポスコ , 新日本製鐵株式会社
发明人： NAGATA YASUAKI , HASHIGUCHI SHOHEI , LIM CHOONG SOO , OH KI JANG , PARK HYUN CHUL , KANG MYOUNG KOO
IPC分类号： G01N29/00
摘要： PROBLEM TO BE SOLVED: To provide a method and device for measurement of a Poisson's ratio, using ultrasonic excitation by thermoelastic effect imparting no damage to the surface of an inspection target in a laser ultrasonic wave method, producing no laser irradiation mark and using ultrasonic excitation by thermoelastic effect, and a Poisson's ratio measuring instrument.
SOLUTION: In the method for measuring the Poisson's ratio of the inspection target by irradiating the surface of the inspection target with a pulse laser beam to generate an ultrasonic wave by the thermoelastic effect and irradiating the surface of the inspection target with a continuous laser beam to receive the ultrasonic wave propagated through the inspection target, the plate ultrasonic wave and surface ultrasonic wave propagated through the inspection target are received to calculate the frequency of the plate ultrasonic wave, and to measure the propagation time of the surface ultrasonic wave, and the propagation speed of the surface ultrasonic wave is calculated from the propagation time and a propagation distance, so that the Poisson's ratio of the inspection target is calculated on the basis of the frequency of the plate ultrasonic wave and the propagation speed of the surface ultrasonic wave.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于测量泊松比的方法和装置，使用在激光超声波方法中对检查对象的表面不造成损伤的热弹性效应的超声波激励，不产生激光照射标记，通过热弹性效应使用超声波激发，以及泊松比测量仪。解决方案：在通过用脉冲激光束照射检查对象的表面来测量检查对象的泊松比的方法中，通过热弹性效应产生超声波，并以连续的方式照射检查对象的表面激光束接收通过检测对象传播的超声波，接收通过检测对象传播的板超声波和表面超声波，计算板超声波的频率，并测量表面超声波的传播时间，并根据传播时间和传播距离计算表面超声波的传播速度，基于板超声波的频率和表面超声波的传播速度来计算检查对象的泊松比波。版权所有（C）2011，JPO＆INPIT

6. 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

7. 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

8. 发明专利

JP2009215388A Device for and method of detecting damage of wall 有权
标题翻译：检测墙体损伤的装置及方法
公开(公告)号：JP2009215388A
公开(公告)日：2009-09-24
申请号：JP2008058971
申请日：2008-03-10
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIGUCHI SHOHEI , YAMADA HIROHISA , SUGIURA MASAHITO , SAKAIDA MICHITAKA
IPC分类号： C10B29/06 , C10B41/00 , G01N29/04
摘要： PROBLEM TO BE SOLVED: To provide a technique for rapidly detecting damage such as a broken hole of a wall in high accuracy by a device construction and procedure simpler than those of a conventional technique, and enabling the execution to be carried out simultaneously with the extrusion operation of cokes by using an ultrasonic sensor. SOLUTION: Many waveguides 11 having ultrasonically transceiving sensors 1 attached to each one terminal thereof are arranged in the perpendicular direction of the furnace wall 6 vertical to the scanning direction. The sensor is cooled in the waveguide 11 by sending air from the backside of the sensor, and an air-sending mechanism for making waveguide layer at low temperatures is installed. When the maximum value of a detected amplitude is present in a time region to be present and is not less than a set threshold when the amplitude of the received ultrasonic wave is detected, the distance from the sensor to the wall based on the difference between the time providing the maximum value as the received time and the sending time, and when the maximum value is smaller than the set threshold, the missing value as the distance value are recorded, and the part of the wall satisfying the successive number of the missing is detected as the damaged part. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过比常规技术更简单的装置结构和程序来以高精度快速检测诸如墙壁破裂孔的损伤的技术，并且能够同时执行执行通过使用超声波传感器挤出操作焦炭。解决方案：具有安装在其每个端子上的超声波收发传感器1的许多波导11沿垂直于扫描方向的炉壁6的垂直方向布置。传感器通过从传感器的背面发送空气而在波导11中冷却，并且安装用于制造低温波导层的送气机构。当检测到的振幅的最大值存在于要存在的时间区域中并且当检测到接收的超声波的振幅时不小于设定的阈值时，根据传感器到墙的距离时间提供最大值作为接收时间和发送时间，并且当最大值小于设置的阈值时，记录作为距离值的缺失值，并且满足连续丢失数量的壁的部分是检测为损坏部分。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2008107156A Method and device for detecting sectional shape 有权
标题翻译：用于检测部分形状的方法和装置
公开(公告)号：JP2008107156A
公开(公告)日：2008-05-08
申请号：JP2006288866
申请日：2006-10-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIGUCHI SHOHEI
IPC分类号： G01B11/24 , G01B11/00
摘要： PROBLEM TO BE SOLVED: To provide a method capable of calculating peaking accurately, at a high speed from a sectional profile of a welded steel pipe acquired by an optical means, having interchangeability with measurement by a dedicated tool.
SOLUTION: In this sectional shape detection method for irradiating a welded zone of the welded steel pipe with linear light or scanned dotted light, imaging an image of the linear light or the dotted light radiated onto the weld zone surface, and detecting the sectional profile of the welded steel pipe by an optical means; a pair of equal-distance points A
k , B
k whose distances from a terminal point P are both R
k are searched for so as to satisfy forced conditions where the distance AB between contact points A, B between the leg of a peaking measuring tool and the sectional profile is equal to the leg width W of the tool, and a line segment CP, connecting the middle point C of AB to the terminal point P, is orthogonal to AB; and the distance A
k B
k between the points is calculated, and the depth CP of a portion close to the leg width W is calculated.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够从通过光学装置获取的焊接钢管的截面形状的高速精确地计算出峰值的方法，其与专用工具的测量具有可互换性。解决方案：在用线性光或扫描点光照射焊接钢管的焊接区域的这种截面形状检测方法中，对照射到焊接区域表面上的线性光或虚线的图像进行成像，并且检测通过光学装置的焊接钢管的截面轮廓; 搜索与终点P的距离都为R k 的一对等距离点A k ，B k ，以便满足强制条件，其中峰值测量工具的腿部与截面轮廓之间的接触点A，B之间的距离AB等于工具的腿部宽度W，以及线段CP，其将AB的中点C连接到终点P与AB正交; 并且计算点之间的距离A k S ，并且计算靠近腿部宽度W的部分的深度CP。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2007192721A Bead shape detection technique and device thereof 有权
标题翻译： BEAD形状检测技术及其设备
公开(公告)号：JP2007192721A
公开(公告)日：2007-08-02
申请号：JP2006012416
申请日：2006-01-20
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HASHIGUCHI SHOHEI , KUNINAGA MANABU , TERASAWA TAKASHI , SUZUKI TAKESHI , YOSHIDA TATSUYA
IPC分类号： G01B11/24 , B23K9/095 , B23K9/127 , B23K31/00 , B23K101/06 , G01B11/02 , G01B11/26
摘要： PROBLEM TO BE SOLVED: To provide a bead shape detection device capable of detecting bead shape more than comparable accuracy from cross-sectional profile of steel pipe obtained by optical means, such as photo cutting technique and laser range finder and the like, even if bead is of gently uneven as well as height of bead is low.
SOLUTION: In the bead shape detection technique where linear beam of light or scanning dotted light is irradiated to weld zones of welded steel pipes, imageries on the surface of welded zones irradiated by linear beam of light or scanning dotted light are imaged, and the cross-sectional profile of steel pipes by optical means are detected, after a coordinate of a temporary apex of the bead is computed by the peak search from the cross-sectional profile, a range of a certain width including of apex of the bead is approximated with a first function, while, by adopting a position, as a starting point, which has a certain distance far from the temporary apex of bead as a reference, a certain width at outside is approximated with a second function, and after an intersecting point of the first function and the second function is computed as a terminal point of the bead, bead shape is computed.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种能够从诸如光切割技术和激光测距仪等通过光学装置获得的钢管的横截面轮廓上比可比较的精度更好地检测胎圈形状的胎圈形状检测装置，即使珠子轻轻地不均匀，珠子的高度也低。解决方案：在将线状光束或扫描点光照射到焊接钢管的焊接区的焊道形状检测技术中，对由线性光束或扫描点亮光照射的焊接区域的表面上的成像进行成像，并且通过光学装置对钢管的横截面轮廓进行检测，在从横截面轮廓通过峰值搜索计算出胎圈的临时顶点的坐标之后，包括珠的顶点的一定宽度的范围以第一功能近似，而通过采用距离珠的临时顶点一定距离作为起点的位置作为参考，外部的一定宽度用第二函数近似，并且在第计算第一功能和第二功能的相交点作为珠的终点，计算珠形。版权所有（C）2007，JPO＆INPIT

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