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Development of an Ear Measurement Method for Ear Product Designs
Hayoung Jung,Wonsup Lee,Sungho Kim,Ilgeun Bok,Chulwoo Kim,Ochae Kwon,Teukgyu Choi,Hogeun Kim,Heecheon You 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11
Objective: The present study developed an ear measurement method based on a 3D scanner and ear casting tools for ear product designs. Background: Detail dimensions and a shape of the ear are required for the ear product design; however, there is a limitation of a 3D ear scanning due to a complex shape of the ear. Method: The present study collected the shape and dimensions of the ear from 100 Korean participants (50 males and 50 females) aged 20 to 59. The overall shape of the ear was scanned in 3D; and inner complex shape of the ear was cast by applying the ear casting tools, then the cast shape was scanned in 3D. Anthropometric landmarks were marked on the 3D shapes of the overall and cast ear, respectively; then 18 ear dimensions were automatically measured by applying an ear measurement system coded using Matlab. Conclusion: The method for the ear measurement and the 3D ear shape establish was developed and applied to the analysis of the ear of 100 Koreans. Application: The developed ear measurement method and the measurements of the ear can be applied to the ear product designs.
Baekhee Lee,Seunghoon Lee,Hayoung Jung,Jawon Lee,Teukgyu Choi,Mina Lee,Hogeun Kim,Eunha Kim,Hojun Jeon,Youngbum Cho,Seungwoo Seo,Heecheon You 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11
Objective: The present study is to evaluate satisfaction of vehicle outside door handles (ODHs) by design factor for improving grip comfort. Background: Existing studies have mainly focused on size and/or shape of typical handles (e.g., cylindrical handle); therefore, a specialized research for ergonomic ODH design is needed. Method: Satisfaction (operation, shape, height, width, tilting angle, central radius (R), inside upper R, inside middle R, inside lower R, pressure distribution, and overall satisfaction) by design factor (2-level: section width; 3-level: central R, inside upper R, inside middle R, inside lower R, tilting angle, and section height) were analyzed by applying a Taguchi L18 design (2¹ × 3<SUP>6</SUP>). Design levels by design factor were determined referring to 5 existing ODHs. 18 ODHs developed in the study were relatively evaluated comparing with a reference ODH (0 point) through an 11-point bipolar scale (-5: extremely dissatisfaction, 0: no difference, +5: extremely satisfaction) by twenty participants aged 20s ~ 50s. Results: Section width and inside upper R were significant on satisfaction of ODH. Conclusion: A design guideline for ODH was established considering users’ satisfaction. Application: The design factor evaluation protocol using Taguchi method applied in the study can be applicable to the other vehicle moving handles (e.g., inside door handle, door trim grip handle, door trim pull handle).
Development of a 3D Anthropometric Sizing Analysis System for Head Product Designs
Wonsup Lee,Baekhee Lee,Sungho Kim,Hayoung Jung,Ilgeun Bok,Chulwoo Kim,Ochae Kwon,Teukgyu Choi,Heecheon You 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.11
Objective: The present study developed a sizing analysis system based on the Civilian American and European Surface Anthropometry Resource (CAESAR) database for head product designs. Background: To find representative heads from a huge amount of 3D human scan database, a sizing analysis system is required for efficient analysis of sizing systems based on anthropometric measurements. The CAESAR 3D scan images were required to be post-processed by applying hole-filling, smoothing, and landmarking for better use to the head product design. Method: The head parts of the CAESAR data (n = 2,299) were manually processed to improve a quality of the 3D image. Twenty one anthropometric landmarks were marked on the processed 3D head images to measure 40 anthropometric dimensions related to the head product design. All head and face dimensions were automatically measured by applying a measurement system coded using Matlab. Conclusion: The sizing analysis system which can be used for analysis of measurements, generation of sizing systems, and visualization of representative 3D head images was developed based on the measurement of the CAESAR. Application: The processed 3D head images and the developed sizing analysis system can be applied to the head product designs.