Evaluation of handle rotational feeling in fishing reels using a bone conduction speaker based on transmission error of gear pairs and predication by MT system

Abstract

This report discusses relationship between a handle rotational feeling in reel and a gear pair vibration. The vibration occurs when a handle of the reel rotates. When the vibration is large, an angler feels uncomfortable. In order to measure the gear pair vibration, an evaluation method using a bone conduction speaker was proposed. In this method, the bone conduction speaker is attached onto the handle knob of the reel, and the slight vibration is measured. The measured data was analyzed by spectrogram and FFT (Fast Fourier Transform) analysis, and characteristic data for the forecast of handle rotational feeling in reel were extracted from the result of the FFT analysis. A total of five sample reels were prepared for evaluation. The evaluation points were made into a ranking, and the handle rotational feeling in these sample reels was judged through human judgment. The best estimate for the forecast was defined to be the average of rankings. In the evaluation for the relationship between handle rotational feeling in reel and the measured data, the MT-system of robust engineering was used. In this analysis, a forecast value was calculated based on these characteristic values. As a result, although the vibration was quite small, it was confirmed that there is a strong relationship between the two. Thereby, it becomes possible to make quantitative judgment. During the judgment, an inspector can hear the vibration sound amplified from the speaker, similar to that of the rotational feeling conducted from the handle. Consequently, the judgment becomes easier, and the judgment accuracy improves dramatically.

Keywords

• face gear
• transmission error
• fishing reel
• bone conduction speaker
• gear vibration
• spectrogram