-
1.发明授权
公开(公告)号：US4991441A
公开(公告)日：1991-02-12
申请号：US349001
申请日：1989-05-08
IPC分类号： F01D21/00 , G01N29/265 , G10K11/35
CPC分类号： G10K11/35 , F01D21/003 , G01N29/265 , G01N2291/2632 , G01N2291/2693
摘要： An immersion base ultrasonic inspection system for interrogating the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in a shear mode inspection of the near bore material. The system includes a positioning assembly for a transducer which includes carriage means for supporting the transducer and a first positioning means for tilting one end of the carriage means in a radial axial plane whereby the transducer may be positioned at an angle to a longitudinal axis of the system. A second positioning means is provided for circumferentially rotating the transducer to a known and repeatable angular position. Position resolver means are coupled to the first and second positioning means.
摘要翻译： 一种浸没式超声波检测系统，用于通过超声波搜索单元通过转子孔来询问涡轮机和发电机转子的孔和近孔材料。 该系统在近孔材料的剪切模式检查中使用可变焦点阵列检查传感器。 该系统包括用于换能器的定位组件，其包括用于支撑换能器的滑架装置和用于将滑架装置的一端倾斜在径向轴向平面中的第一定位装置，由此换能器可以与 系统。 提供第二定位装置，用于将换能器周向旋转到已知且可重复的角位置。 位置解算器装置联接到第一和第二定位装置。
-
公开(公告)号：US4864862A
公开(公告)日：1989-09-12
申请号：US160211
申请日：1988-02-25
IPC分类号： F01D21/00 , G01N29/22 , G01N29/265 , G10K11/35
CPC分类号： F01D21/003 , G01N29/223 , G01N29/265 , G01N29/4463 , G10K11/35 , G01N2291/2632 , G01N2291/2693
摘要： An immersion based ultrasonic inspection system is disclosed which is used to interrogate the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in a shear mode inspection of the near bore material. The flaw location method includes recording calibration transit times and transducer locations for calibration holes from which refraction angles, and material velocities are determined. When a flaw is detected the surface time for a bore surface reflection, the flaw reflection time and transducer position are used to determine the position of the flaw.
摘要翻译： 公开了一种浸没式超声波检测系统，其通过使超声波搜索单元通过转子孔而用于询问涡轮机和发电机转子的孔和近孔材料。 该系统在近孔材料的剪切模式检查中使用可变焦点阵列检查传感器。 缺陷定位方法包括记录校准传送时间和用于校准孔的传感器位置，从中确定折射角和材料速度。 当检测到缺陷时，孔表面反射的表面时间，缺陷反射时间和换能器位置用于确定缺陷的位置。
-
公开(公告)号：US4991427A
公开(公告)日：1991-02-12
申请号：US511705
申请日：1990-04-20
CPC分类号： G01S7/52004 , G01B17/00 , G01S15/88 , F05B2200/262
摘要： The present invention includes a bore mapping system that includes one or more high resolution ultrasonic mapping transducers that are used to measure the diameter of a bore. The travel time for a normally incident pulse to reach the bore surface and return for each transducer is used with a reference reflection time measured in a calibration bore to determine the measured diameter from a mechanically measured reference diameter using a known velocity of the ultrasonic pulse in an immersion fluid. The diameter measured by each of the transducers is averaged to obtain an average measured diameter which is produced for plural axial rotor positions. The present invention also includes a surface time measurement system that uses at least one ranging transducer measuring the ranging time required for a ranging beam to reach and return from the bore surface. The measured ranging time is used with a calibrated ranging time obtained in the calibration bore to modify a calibrated inspection beam surface time for an inspection transducer to obtain a current inspection beam surface time. The ranging time can also be used to obtain a correction time curve that provides correction time for the inspection beam surface time versus circumferential bore position. The calibrated inspection beam surface time or the correction time curve, are used to correct positions of flaws in the rotor material.
摘要翻译： 本发明包括孔径映射系统，其包括用于测量孔直径的一个或多个高分辨率超声波映射换能器。 正常入射脉冲到达孔表面并返回每个换能器的行进时间与在校准孔中测量的参考反射时间一起使用，以使用已知的超声脉冲的速度从机械测量的参考直径确定测量的直径 浸液 对每个换能器测量的直径进行平均，以获得为多个轴向转子位置产生的平均测量直径。 本发明还包括一个表面时间测量系统，其使用至少一个测距传感器来测量测距光束从孔表面到达和返回所需的测距时间。 测量的测距时间与校准孔中获得的校准测距时间一起使用，以修改检查传感器的校准检查光束表面时间，以获得当前检查光束表面时间。 测距时间也可用于获得校正时间曲线，该校正时间曲线为检查光束表面时间与圆周孔位置提供校正时间。 校准的检查光束表面时间或校正时间曲线用于校正转子材料中缺陷的位置。
-
公开(公告)号：US4964295A
公开(公告)日：1990-10-23
申请号：US878649
申请日：1986-06-26
CPC分类号： G01B17/00 , G01S15/88 , G01S7/52004 , F05B2200/262 , G01N2291/2693
摘要： The present invention includes a bore mapping system that includes one or more high resolution ultrasonic mapping transducers that are used to measure the diameter of a bore. The travel time for a normally incident pulse to reach the bore surface and return for each transducer is used with a reference reflection time measured in a calibration bore to determine the measured diameter from a mechanically measured reference diameter using a known velocity of the ultrasonic pulse in an immersion fluid. The diameter measured by each of the transducers is averaged to obtain an average measured diameter which is produced for plural axial rotor positions. The present invention also includes a surface time measurement system that uses at least one ranging transducer measuring the ranging time required for a ranging beam to reach and return from the bore surface. The measured ranging time is used with a calibrated ranging time obtained in the calibration bore to modify a calibrated inspection beam surface time for an inspection transducer to obtain a current inspection beam surface time. The ranging time can also be used to obtain a correction time curve that provides correction time for the inspection beam surface time versus circumferential bore position. The calibrated inspection beam surface time or the correction time curve, are used to correct positions of flaws in the rotor material.
摘要翻译： 本发明包括孔径映射系统，其包括用于测量孔直径的一个或多个高分辨率超声波映射换能器。 正常入射脉冲到达孔表面并返回每个换能器的行进时间与在校准孔中测量的参考反射时间一起使用，以使用已知的超声脉冲的速度从机械测量的参考直径确定测量的直径 浸液 对每个换能器测量的直径进行平均，以获得为多个轴向转子位置产生的平均测量直径。 本发明还包括一个表面时间测量系统，其使用至少一个测距传感器来测量测距光束从孔表面到达和返回所需的测距时间。 测量的测距时间与校准孔中获得的校准测距时间一起使用，以修改检查传感器的校准检查光束表面时间，以获得当前检查光束表面时间。 测距时间也可用于获得校正时间曲线，该校正时间曲线为检查光束表面时间与圆周孔位置提供校正时间。 校准的检查光束表面时间或校正时间曲线用于校正转子材料中缺陷的位置。
-
公开(公告)号：US4803638A
公开(公告)日：1989-02-07
申请号：US878817
申请日：1986-06-26
CPC分类号： G01N29/38 , G01N29/22 , G01N29/4454 , G01N29/4463 , G01N2291/02854 , G01N2291/2693
摘要： An ultrasonic signal processing system that includes flaw gates that process signals from an inspection transducer is disclosed. The flaw gates operate in pairs where each pair is dedicated to a time window corresponding to, for example, flaw depth or transducer angle. The time window for a pair of flaw gates is indicated by a channel code produced by a timing control unit. One flaw gate in each pair processes incoming digitized transducer signals during a scan to produce reflector indications while the other gate in each pair transfers data from a previous different position scan to a main computer. The main computer determines flaw locations from the reflector indications and transducer positions provided by the flaw gate. The flaw gates each adjust reflector indication location signals for changes in distance between an immersed ultrasonic wave inspection transducer and the surface of the material being inspected as well as record the location of the inspection transducer at the time of each indication detection. The flaw gates produce the indication by comparing the digitized transducer signal waveform with a threshold curve where an indication is an excursion of the signal waveform above the threshold. The flaw gates each contain a comparator that indicates when the window is open and activates a waveform memory that automatically stores the digitized transducer signals during the window.
摘要翻译： 公开了一种超声波信号处理系统，其包括处理来自检查传感器的信号的缺陷门。 缺陷门成对运行，其中每对专用于对应于例如缺陷深度或换能器角度的时间窗。 一对缺陷闸门的时间窗口由定时控制单元产生的通道代码指示。 每对中的一个缺陷门在扫描期间处理输入的数字化换能器信号以产生反射器指示，而每对中的另一个门将数据从先前的不同位置扫描传输到主计算机。 主计算机确定由缺陷门提供的反射器指示和换能器位置的缺陷位置。 缺陷门每个调整反射器指示位置信号，用于在浸没的超声波检查传感器和被检查材料的表面之间的距离变化以及在每次指示检测时记录检查传感器的位置。 缺陷门通过将数字化的换能器信号波形与阈值曲线进行比较来产生指示，其中指示是高于阈值的信号波形的偏移。 缺陷门每个都包含一个比较器，指示窗口何时打开，并激活一个波形存储器，在窗口期间自动存储数字化的换能器信号。
-
公开(公告)号：US4757716A
公开(公告)日：1988-07-19
申请号：US117918
申请日：1987-11-06
IPC分类号： F01D21/00 , G01N29/22 , G01N29/265 , G10K11/35 , G01N29/04
CPC分类号： G10K11/35 , F01D21/003 , G01N29/223 , G01N29/265 , G01N29/4463 , G01N2291/2632 , G01N2291/2693
摘要： An immersion based ultrasonic inspection system is disclosed which is used to interrogate the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in a shear mode inspection of the near bore material. A ranging transducer is provided which is used to correct the surface time of the inspection beam. A mapping transducer and blind bore sensor allow diameter mapping of the rotor bore as well as a blind rotor end sensing as the scan head carrying the transducers enters the bore. A scan head centering device or chuck deploys four radial arms to center and support the scan head. Each arm has a roller attached to the end which contacts the bore and rolls along so that the bore will not be damaged as the scan head passes through the bore. The chuck is driven by an electric motor and coupled to a resolver allowing the chuck to be adjusted according to bore geometry mapped by the mapping transducer. The chuck includes a pneumatic disengagement device for fail-safe disengagement of the centering arms to allow retrieval of the scan head in the event of motor or wiring failure. The chuck also includes cable pathways for control cables for the various scan head motion axes. An inspection transducer carriage is provided that provides three axes of motion to the inspection transducer. A radial motion is provided by two radial support assemblies driven by an electric motor and coupled to a resolver allowing radial position to be accurately determined.
摘要翻译： 公开了一种浸没式超声波检测系统，其通过使超声波搜索单元通过转子孔而用于询问涡轮机和发电机转子的孔和近孔材料。 该系统在近孔材料的剪切模式检查中使用可变焦点阵列检查传感器。 提供了一种测距传感器，用于校正检查光束的表面时间。 映射传感器和盲孔传感器允许转子孔的直径映射以及当传感器的扫描头进入孔时的盲转子端感测。 扫描头定心装置或卡盘部署四个径向臂以居中并支撑扫描头。 每个臂具有附接到端部的辊，其接触孔并且滚动，使得当扫描头通过孔时孔不会被损坏。 卡盘由电动机驱动并连接到旋转变压器，允许根据由映射换能器映射的孔几何形状来调整卡盘。 卡盘包括用于故障安全脱离定心臂的气动分离装置，以允许在电动机或接线故障的情况下取回扫描头。 卡盘还包括用于各种扫描头运动轴的控制电缆的电缆路径。 提供检查传感器托架，其向检测传感器提供三个运动轴。 径向运动由两个由电动马达驱动的径向支撑组件提供，并连接到能够准确地确定径向位置的旋转变压器。
-
公开(公告)号：US4434660A
公开(公告)日：1984-03-06
申请号：US245304
申请日：1981-03-19
IPC分类号： G01N29/265 , G01N29/04
CPC分类号： G01N29/265
摘要： An ultrasonic inspection apparatus for the inspection of metal structures, especially installed pipes.The apparatus combines a specimen inspection element, an acoustical velocity sensing element, and a surface profiling element, all in one scanning head. A scanning head bellows contains a volume of oil above the pipe surface, serving as acoustical couplant between the scanning head and the pipe.The scanning head is mounted on a scanning truck which is mobile around a circular track surrounding the pipe. The scanning truck has sufficient motors, gears, and position encoders to allow the scanning head six degrees of motion freedom.A computer system continually monitors acoustical velocity, and uses that parameter to process surface profiling and inspection data. The profiling data is used to automatically control scanning head position and alignment and to define a coordinate system used to identify and interpret inspection data.The apparatus is suitable for highly automated, remote application in hostile environments, particularly high temperature and radiation areas.
摘要翻译： 一种用于检查金属结构，特别是安装管道的超声波检测装置。 该装置将样本检查元件，声速检测元件和表面轮廓元件全部组合在一个扫描头中。 扫描头波纹管在管表面上包含一定量的油，用作扫描头和管之间的声耦合剂。 扫描头安装在扫描卡车上，扫描卡车围绕管道周围的圆形轨道移动。 扫描卡车具有足够的电机，齿轮和位置编码器，以允许扫描头具有六个运动自由度。 计算机系统连续监测声速，并使用该参数来处理表面分析和检查数据。 分析数据用于自动控制扫描头位置和对齐，并定义用于识别和解释检查数据的坐标系。 该设备适用于恶劣环境，特别是高温和辐射区域的高度自动化，远程应用。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.025 秒)