Abstract: An apparatus monitors physical signals, such as vibration, produced by an asset, such as a motor. Sensor signals corresponding to the physical signals are applied to a bandpass Görtzel filter that passes a frequency band around a characteristic frequency of a physical signal. An analyzer produces information corresponding to the physical condition of the asset based on the Görtzel filtered signal. A tracking unit periodically updates parameters of the Görtzel filter so that the bandpass frequencies of the Görtzel filter track the characteristic frequency of the physical signal. Each Görtzel filter may include a comb filter whose output is applied to a plurality of resonators, whose outputs are applied to a windowing unit. The Görtzel filter is preferably a Görtzel filter block that is made up of a plurality of individual Görtzel filters.

Abstract: Two speed measurements of a moving body are generated using a single signal. A sensor generates a composite signal having a series of pulses where each pulse is generated when an element on a moving body passes the sensor. A sensor conditioning unit decouples the composite signal to generate a first conditioned sub-signal having only an AC signal corresponding to an AC component of the composite signal and a second conditioned sub-signal corresponding to the composite signal that may have either or both AC and DC components. A timer/counter input unit computes a first speed measurement by determining a count of pulses in the first conditioned sub-signal and a first time period or the time period of one pulse. The second conditioned sub-signal is transmitted to an analog-to-digital converter (ADC) and is sampled at a sampling rate to generate a sampled second conditioned sub-signal.

Abstract: An instrument for performing order analysis on a rotational machine. An input module receives periodic motion data, and machine characteristic data that is associated by time with the periodic motion data. A processor module receives the periodic motion data and the machine characteristic data, applies a Goertzel module to the periodic motion data and the machine characteristic data, and thereby creates an order data set comprising magnitude of machine characteristic data versus order of normalized periodic motion data.

Abstract: An apparatus monitors physical signals, such as vibration, produced by an asset, such as a motor. Sensor signals corresponding to the physical signals are applied to a bandpass Görtzel filter that passes a frequency band around a characteristic frequency of a physical signal. An analyzer produces information corresponding to the physical condition of the asset based on the Görtzel filtered signal. A tracking unit periodically updates parameters of the Görtzel filter so that the bandpass frequencies of the Görtzel filter track the characteristic frequency of the physical signal. Each Görtzel filter may include a comb filter whose output is applied to a plurality of resonators, whose outputs are applied to a windowing unit. The Görtzel filter is preferably a Görtzel filter block that is made up of a plurality of individual Görtzel filters.

Abstract: Useful and meaningful machine characteristic information may be derived through analysis of oversampled digital data collected using dynamic signal analyzers, such as vibration analyzers. Such data have generally been discarded in prior art systems. In addition to peak values and decimated values, other oversampled values are used that are associated with characteristics of the machine being monitored and the sensors and circuits that gather the data. This provides more useful information than has previously been derived from oversampled data within a sampling interval.

Abstract: Two speed measurements of a moving body are generated using a single signal. A sensor generates a composite signal having a series of pulses where each pulse is generated when an element on a moving body passes the sensor. A sensor conditioning unit decouples the composite signal to generate a first conditioned sub-signal having only an AC signal corresponding to an AC component of the composite signal and a second conditioned sub-signal corresponding to the composite signal that may have either or both AC and DC components. A timer/counter input unit computes a first speed measurement by determining a count of pulses in the first conditioned sub-signal and a first time period or the time period of one pulse. The second conditioned sub-signal is transmitted to an analog-to-digital converter (ADC) and is sampled at a sampling rate to generate a sampled second conditioned sub-signal.

Abstract: An instrument for performing order analysis on a rotational machine. An input module receives periodic motion data, and machine characteristic data that is associated by time with the periodic motion data. A processor module receives the periodic motion data and the machine characteristic data, applies a Goertzel module to the periodic motion data and the machine characteristic data, and thereby creates an order data set comprising magnitude of machine characteristic data versus order of normalized periodic motion data.

Abstract: Useful and meaningful machine characteristic information may be derived through analysis of oversampled digital data collected using dynamic signal analyzers, such as vibration analyzers. Such data have generally been discarded in prior art systems. In addition to peak values and decimated values, other oversampled values are used that are associated with characteristics of the machine being monitored and the sensors and circuits that gather the data. This provides more useful information than has previously been derived from oversampled data within a sampling interval.