Ntn Corporation

Wataru Hatakeyama

Toru Takahashi

Kentarou Nishikawa

Takashi Haseba

Yosuke Suzuki

Makoto Miyazaki

A data processing device includes a peak detector that detects a peak from a frequency spectrum and a map generator that generates an abnormality map for the frequency spectrum. The abnormality map includes as abnormal components, a frequency of a detected peak of interest and a frequency of a peak that appears together with the peak of interest when the peak of interest is assumed as the peak originating from abnormality. The data processing device includes an abnormal peak extractor that extracts as an abnormal peak, a peak at a frequency that matches with any of the abnormal components included in the abnormality map and a first criterion value calculator that calculates a first criterion value representing occurrence of abnormality corresponding to the abnormality map based on a spectral density of the abnormal peak.

Condition monitoring apparatus, condition monitoring system, and condition monitoring method

At least one or more sensor for detecting a load acting on a wheel support bearing apparatus is provided in such bearing device, a signal processor for processing an output signal of those sensors to generate a signal vector and a load calculator for calculating the load, which acts on a vehicle wheel, from the signal vector, are provided. The load calculator has a function of determining the presence or absence of a predetermined state of a vehicle, which may affects a result of calculation of the load, and performing two types of calculation process appropriate to the presence or absence. The presence or absence of the predetermined state of the vehicle, which is determined by the load calculator is, for example, ON/OFF of a brake.

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Iwata, Japan

Wataru Hatakeyama