公开(公告)号：US3727133A

公开(公告)日：1973-04-10

申请号：US3727133D

申请日：1970-12-28

Applicant: GEN ELECTRIC

Inventor： WEICHBRODT B ,  MARVIN J ,  MARTZLOFF F

IPC: G01R31/34 ,  G01R31/02

CPC classification number: G01R31/343

Abstract: A signal is derived corresponding to variations in the unidirectional current flowing in the external power lines to a direct current rotating machine. A second signal is derived from the first signal having a period equal to the period of revolution of a commutator divided by the number of commutator segments. The appearance in the second signal of peaks short in duration in relation to said period indicates a defect in commutation of current in the armature winding of the direct current machine.

Abstract translation: 对应于在外部电力线中流向直流旋转机器的单向电流的变化而导出的信号。 从具有等于换向器的转数周期的周期除以换向器段的数量的第一信号导出第二信号。 相对于所述周期的持续时间短的第二峰值信号的出现表明直流电机的电枢绕组中的电流换向不足。

公开(公告)号：US3798626A

公开(公告)日：1974-03-19

申请号：US3798626D

申请日：1972-02-28

Applicant: GEN ELECTRIC

Inventor： WEICHBRODT B ,  DARREL B

IPC: F02C7/05 ,  G08B21/00

CPC classification number: F02C7/05

Abstract: Vibrations generated by objects impacting on the blades of the rotor of the engine are sensed by an accelerometer located on the rotor bearing mount. A peak detection circuit with a suitable decay time constant is provided for detection of the peaks in the signal from the accelerometer corresponding to peaks in the vibrations from the rotor. A level detection circuit is provided responsive to a predetermined level of the detected signal to actuate suitable indication means such as an alarm.

Abstract translation: 影响发动机转子叶片的物体产生的振动由位于转子轴承座上的加速度计感测。 提供具有合适的衰减时间常数的峰值检测电路，用于检测来自加速度计的信号中对应于来自转子的振动中的峰值的峰值。 响应于预定水平的检测信号提供电平检测电路以致动合适的指示装置，例如报警器。

公开(公告)号：US3712130A

公开(公告)日：1973-01-23

申请号：US3712130D

申请日：1970-10-30

Applicant: GEN ELECTRIC

Inventor： WEICHBRODT B ,  DARREL B

IPC: G01H1/00 ,  G01M13/02

CPC classification number: G01M13/021 ,  G01H1/003 ,  G01M13/028

Abstract: A distributed defect in one of a pair of meshing gears produces a modulation in amplitude of the component of the vibration signal which has the same repetition rate as the meshing frequency of the gears. The modulation has a frequency corresponding to the period of rotation of the gear with the distributed effect or a submultiple thereof. Detection of the modulation provides an indication of the existence, character and extent of the defect.

Abstract translation: 一对啮合齿轮之一中的分布式缺陷产生与齿轮的啮合频率相同的重复频率的振动信号分量的幅度调制。 调制具有对应于具有分布效应的齿轮的旋转周期的频率或其相应的频率。 调制的检测提供了缺陷的存在，特征和程度的指示。