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公开(公告)号：US4843885A
公开(公告)日：1989-07-04
申请号：US168975
申请日：1988-03-16
申请人： Joseph E. Bambara
发明人： Joseph E. Bambara
CPC分类号： G01N29/14 , B61K9/04 , G01M13/045 , G01N2291/2696
摘要： An apparatus for the detection of impact frequencies in moving railway train bearings which are characteristic of bearing defects. The apparatus transduces acoustic vibrations of the bearings into an electrical signal and extracts an envelope modulated carrier frequency component from the electric signal. The envelope is extracted from the carrier frequency component and is analyzed by a bandpass filter. The bandpass filter includes a switch capacitor filter controlled by a master clock which, in turn, is controlled by train speed and/or direction sensors positioned along the track on which the train travels.
摘要翻译： 用于检测运动轨道列车轴承的冲击频率的装置，这是轴承缺陷的特征。 该装置将轴承的声音振动转换成电信号，并从电信号中提取包络调制的载波频率分量。 从载波频率分量中提取信封，并通过带通滤波器进行分析。 带通滤波器包括由主时钟控制的开关电容滤波器，该主时钟又由沿着列车行进的轨道定位的列车速度和/或方向传感器控制。
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公开(公告)号：US4292639A
公开(公告)日：1981-09-29
申请号：US103930
申请日：1979-12-17
申请人： Joseph E. Bambara
发明人： Joseph E. Bambara
IPC分类号： G01S3/54
CPC分类号： G01S3/54
摘要： A quasi-doppler direction finder is provided wherein the alternate dipole elements are divided into two groups. Each of the groups is connected to an associated RF attenuator which is driven by a control signal 180.degree. out-of-phase from that for the other group. Commutation between dipoles occurs so that there is a 50% overlap of "on" time between adjacent dipoles. Switching for each dipole occurs when its associated modulating function passes through zero.
摘要翻译： 提供准多普勒方向取样器，其中将交替偶极子元件分成两组。 每个组连接到相关联的RF衰减器，该衰减器由与另一组相异180°的控制信号驱动。 偶极子之间的换向发生，使得相邻偶极子之间存在“开”时间的50％重叠。 当其相关联的调制功能通过零时，发生每个偶极子的切换。
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公开(公告)号：US5150618A
公开(公告)日：1992-09-29
申请号：US622176
申请日：1990-12-04
申请人： Joseph E. Bambara
发明人： Joseph E. Bambara
CPC分类号： G01M13/045 , B61K9/04 , G01H1/003 , G01H3/08 , G01N29/14 , G01N29/38 , G01N2291/2623
摘要： The present invention relates to bearing defect detectors and in particular to an acoustic system for detecting defects in the bearings of moving railroad cars and identifying the location of these defects.
摘要翻译： 本发明涉及轴承缺陷检测器，特别涉及用于检测移动铁路车辆的轴承中的缺陷并识别这些缺陷的位置的声学系统。
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公开(公告)号：US5029477A
公开(公告)日：1991-07-09
申请号：US472737
申请日：1990-01-31
申请人： Joseph E. Bambara
发明人： Joseph E. Bambara
CPC分类号： G01N29/348 , G01N29/30
摘要： This invention relates to the testing of apparatus used for on-line acoustic detection of bearing defects, particularly in railroad applications. A loudspeaker on each side of the section of track, in response to a microprocessor, generates simulated acoustic signatures characteristics of various bearing defects. The microprocessor additionally sends corresponding simulated train speed signals to the apparatus. The invention monitors the apparatus for the appropriate alarm signal.
摘要翻译： 本发明涉及用于在线检测轴承缺陷的设备的测试，特别是在铁路应用中。 在轨道的每一侧的扬声器响应于微处理器，产生各种轴承缺陷的模拟声学特征。 微处理器另外将相应的模拟列车速度信号发送到设备。 本发明监测装置的适当报警信号。
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公开(公告)号：US4790190A
公开(公告)日：1988-12-13
申请号：US104801
申请日：1987-10-02
CPC分类号： G01N29/14 , B61K9/04 , G01M13/045 , G01N2291/2696
摘要： This invention relates to apparatus for the detection of accustic impact frequencies, characteristic of bearing assembly failure during operation, which modulate an acoustic carrier frequency band. This apparatus allows for on-site or field application with high-level of ambient noise such as are present in railroad yards. This apparatus allows for early detection of such failures, so that a repair may be made before damaging heat build-up or catastrophic bearing failure occurs. Additionally, with sufficient early warning in railroad applications, a train may continue running to a railyard for convenient shop repair rather than expensive field repair.
摘要翻译： 本发明涉及用于检测腐蚀性冲击频率的装置，其用于操作中的轴承组装故障，其调制声载波频带。 该设备允许在现场或现场应用高级别的环境噪声，例如存在于铁路场地中。 该装置允许早期检测到这种故障，使得可能在损坏发热或发生灾难性轴承故障之前进行修理。 另外，在铁路应用中有足够的预警，一列火车可能继续运行到railyard进行便利的维修，而不是昂贵的现场维修。
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公开(公告)号：US4345274A
公开(公告)日：1982-08-17
申请号：US195102
申请日：1980-10-08
申请人： Joseph E. Bambara
发明人： Joseph E. Bambara
CPC分类号： B61L25/041 , H04N7/183
摘要： A system to permit the visual observation of objects moving along a fixed path. The object is viewed through a television camera which images the object through an optic axis bending element. The bending element is angularly rotated in a sawtooth manner with the slope of the sawtooth determined by the speed at which the object moves along the path so as to track the object to immobilize the scene viewed by the mirror.
摘要翻译： 允许目视观察沿着固定路径移动的物体的系统。 通过电视摄像机观察物体，其通过光轴弯曲元件对物体进行成像。 弯曲元件以锯齿形方式旋转，其中锯齿的斜率由物体沿着路径移动的速度确定，以便跟踪物体以固定由镜子观看的场景。
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公开(公告)号：US4323211A
公开(公告)日：1982-04-06
申请号：US144770
申请日：1980-04-28
CPC分类号： B61K9/06
摘要： A railroad car hot box detector system is provided which includes a variable circuit means for processing the heat signal generated by an infra-red detector viewing a sensing zone along a section of track. The system includes a conditioning circuit which determines one or more conditions of the train (such as the wheel speed or temperature of the car bottom) and uses that information to vary the processing circuit to enable the heat signal to be processed optimally for the detected condition.
摘要翻译： 提供了一种铁路车箱热箱检测器系统，其包括用于处理由沿着轨道部分观察感测区域的红外探测器产生的热信号的可变电路装置。 该系统包括调节电路，其确定列车的一个或多个条件（例如车轮速度或汽车底部的温度），并且使用该信息来改变处理电路，以使热信号能够针对检测到的条件进行最佳处理 。
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公开(公告)号：US4313583A
公开(公告)日：1982-02-02
申请号：US135628
申请日：1980-03-31
IPC分类号： B61K9/00 , A61B17/70 , A61B17/86 , A61B19/00 , A61F2/00 , A61F2/30 , A61F2/44 , B61K9/06 , B61L1/10 , B61K9/04 , G08B21/00
CPC分类号： B61K9/06 , Y10S246/02
摘要： An improved method and circuit is provided for processing waveforms from a railway car heat signal to eliminate spurious signals and to differentiate between roller bearings and friction bearings in a railroad hot box detector system. The waveforms generated by passing bearings are discretely sampled and spurious signals are eliminated by considering only those signals that fall within the crossing points of a threshold value. Discrimination between roller bearings and friction bearings is obtained by determining the ratio of the sum of the discrete values of the amplitude of the waveform within a first set of samples between the crossing points to the sum of the discrete values of the amplitude of the waveform within a second set of samples between the crossing points.
摘要翻译： 提供了一种改进的方法和电路，用于处理来自铁路车辆热信号的波形，以消除杂散信号并区分铁路热箱检测器系统中的滚子轴承和摩擦轴承。 通过轴承产生的波形是离散采样的，只考虑那些落在阈值交叉点内的信号来消除杂散信号。 滚子轴承和摩擦轴承之间的鉴别是通过确定在交叉点之间的第一组样本之间的波形的幅度的离散值之和与波形的振幅的离散值之和的比值 交叉点之间的第二组样本。
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