Easy set-up and in situ automatic gear diagnostic system using laser beam reflection (development of a new method enables to remove effects of the rotational fluctuation instead of a rotary encoder)

Tanaka, Eiichirou; Nakajima, Keyaki; Kojima, Yoshitaka; Okabe, Kazunari; Takebe, Hitoshi; Nagamura, Kazuteru; Ikejo, Kiyotaka; Nemoto, Ryozo

doi:10.1533/9781782421955.1110

Cited by 1 publication

(2 citation statements)

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“…The laser irradiation angle conditions can be defined, as discussed in a previous paper (Tanaka, et al, 2013b). The hardware configuration of the automated gear-tooth diagnosis system and the control system are also described explained in previous publications (Tanaka, et al, 2014) (Nakajima, et al, 2015). Therefore, in this study, we focus our discussion mainly on our new method that can determine angle g, as shown in Fig.…”

Section: Laser-scattering Damage Diagnosis Methods and Automated Gear mentioning

confidence: 99%

“…However, the above mentioned laser diagnostic system requires a rotary encoder in order to obtain angle values of the targeted gear shaft during the laser measurement; this presents a problem because it is difficult to attach the rotary encoder on a gear shaft of gearboxes used in some factories. We then we developed a new diagnostic method without a rotary encoder for easy on-site diagnosis of the gear tooth surface condition (Tanaka, et al, 2014) (Nakajima, et al, 2015). This method is as follows: 1) the tooth bottom, the tooth tip and their two medians are detected using the differentials of the laser reflection data.…”

Section: Introductionmentioning

confidence: 99%

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Easy set-up and in situ automatic gear diagnostic system using only laser reflection

Tanaka

Nakajima

Okabe³

et al. 2016

JAMDSM

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We developed a new method that can diagnose damage on a gear tooth surface using a laser beam without a rotary encoder. The method procedure is as follows: 1) The tooth bottom, the tooth tip and their two median values are detected using the differential values of the laser reflection data. 2) The gear rotation speed is calculated with these four positions, and interpolated according to the rotation fluctuation. 3) Using the calculated gear rotation speed, the measured data can be converted to the corresponding gear rotation angles. Thus we can diagnose the damage of the gear tooth surface precisely and can easily set up the experimental measurements without being influenced by rotational fluctuation. To confirm the validity of the method, we conducted the diagnosis experiment and we created contour maps to show the diagnosis accuracy variation according to the fluctuations of the amplitude and cycle. Based on these maps, we found that the diagnosis accuracy of the damage size is the same irrespective of the presence or absence of a rotary encoder. The diagnosis accuracy of the damage location without using a rotary encoder is lower than the result obtained using a rotary encoder because we assumed that the detection of the damage start point is delayed using this new method. Furthermore, we defined the limit using the conditions of this method from the sampling theorem; the validity of this definition could also be confirmed from the contour map.

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Section: Laser-scattering Damage Diagnosis Methods and Automated Gear mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Easy set-up and in situ automatic gear diagnostic system using only laser reflection

Tanaka

Nakajima

Okabe³

et al. 2016

JAMDSM

View full text Add to dashboard Cite

show abstract

Easy set-up and in situ automatic gear diagnostic system using laser beam reflection (development of a new method enables to remove effects of the rotational fluctuation instead of a rotary encoder)

Cited by 1 publication

References 3 publications

Easy set-up and in situ automatic gear diagnostic system using only laser reflection

Easy set-up and in situ automatic gear diagnostic system using only laser reflection

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