초록 ▼

A diagnostic system includes a vibration sensor mounted on a machine to measure vibrations. Vibration signals from the sensor are processed and analyzed by the system. From a known critical frequency of a vibration-generating component, the system measures the amplitude of the vibration signal at mo

A diagnostic system includes a vibration sensor mounted on a machine to measure vibrations. Vibration signals from the sensor are processed and analyzed by the system. From a known critical frequency of a vibration-generating component, the system measures the amplitude of the vibration signal at more than one harmonic frequency of the known critical frequency and compares the amplitudes to amplitudes at adjacent harmonic frequencies. When a relatively large amplitude is found at a harmonic frequency, that is a harmonic frequency near a resonant frequency of the physical path between the vibration sensor and the vibration-generating component, the system analyzes the shape and magnitude of the vibration signal around that harmonic frequency to evaluate the condition of the machine.

대표청구항 ▼

[ What is claimed is:] [1.]1. A diagnostic system for a dynamoelectric machine, comprising:at least one vibration sensor mounted on the machine to sense vibration; anda processor adapted to receive a vibration signal from the at least one vibration sensor, the processor scanning a vibration signatur

[ What is claimed is:] [1.]1. A diagnostic system for a dynamoelectric machine, comprising:at least one vibration sensor mounted on the machine to sense vibration; anda processor adapted to receive a vibration signal from the at least one vibration sensor, the processor scanning a vibration signature corresponding to the vibration signal over a series of frequencies to identify a resonant frequency for a transmission path from a vibration source to the at least one vibration sensor and to evaluate the vibration signature in the vicinity of the resonant frequency to determine an operating state of the machine.