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http://dx.doi.org/10.9766/KIMST.2013.16.1.027

Helmet Tracking Techniques Using Phase Difference between Acoustic Beating Envelope which Wave Length is Longer than Audio Frequency  

Choi, Kyong-Sik (국항공우주산업(주))
Kim, Sang-Seok (국항공우주산업(주))
Park, Chan-Heum (국항공우주산업(주))
Yang, Jun-Ho (국항공우주산업(주))
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.16, no.1, 2013 , pp. 27-33 More about this Journal
Abstract
Helmet Mounted Display(HMD) has great advantages on the navigation and mission symbologies for the pilot's forward looking display and, therefore, has been remarkably drawing attention as the up coming display of the next generation aircraft. The essential technology to process the Line of Sight-Foward(LOS-F) data in real-time is to estimate exact helmet situation and position. In this paper, we research a acoustic helmet tracking technique. For the reason that mechanical acoustic noises might interfere with Helmet Tracking System(HTS) and unnecessary acoustic noises are inevitable when using acoustic technique, this approach has not been adapted. In order to overcome this problem. We propose that acoustic wave of which the wave length is longer than audio frequency and, especially, we used beating signal envelope which is composed of two close high frequency.
Keywords
HMD(Helmet Mounted Display); HTS(Helmet Tracking System); Beating Signal; Acoustic; Envelope;
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