Evaluation of oscillatory actuator for optical scanner

Matsumoto, Tsutomu; Teramae, Yoshinori; Hattori, Yuki; Horio, Tatsuya

doi:10.1109/icelmach.2010.5608199

Cited by 4 publications

(2 citation statements)

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“…They concluded that the scanner performance is typically limited by the damping losses. Mizuno et al 15 proposed an optical scanner with two torsion bar springs and presented the calculation of constant damping ratio. Du et al 16 presented a doublelayered vibratory grating laser scanner.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on the Damping Characteristics of a Linear Optical Scanner

2013

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A mechanically resonant torsional spring scanner was previously designed for light dispersion application. However, the effects of mountings and pressure variation on the damping characteristic of the scanner were not well studied. In this study, the damping characteristics of the linear optical scanner with torsional spring mechanism are investigated with a mathematical model and various experiments. To examine the scanner's free response profile when the resonance frequency and damping ratio were varied, a damping model was established based on experimental results. Several experiments were performed to investigate the damping characteristics when environmental pressure and scanner mounting are changed. The scanner mountings consist of rigid mounting, spring demounting, and the use of various dampers. In general, the scanner damping was shown to be greater at higher atmospheric pressures when the scanner was mounted on a foam damper.

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Section: Introductionmentioning

confidence: 99%

An Investigation on the Damping Characteristics of a Linear Optical Scanner

2013

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“…In our previous research, a cantilever torsion spring composed of stainless steel was proposed to develop a compact optical scanner exhibiting low power consumption and high reliability [12]. In the structure, two stainless steel plates positioned orthogonal to each other were used to build the torsion spring.…”

Section: Introductionmentioning

confidence: 99%

Magnetic spring characteristic of an oscillatory actuator with silicone rubber torsion springs for optical scanner applications

Kinjo

Oyaizu

et al. 2014

International Journal of Applied Electromagnetics and Mechanics

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A compact electro-magnetic oscillatory actuator was proposed based on a pair of torsion springs for optical scanners operating at low oscillating frequencies, such as 50 Hz for a portable barcode scanner. Each torsion spring in the actuator is made of silicone rubber and is dually supported at both ends. A yoke is coupled with the driven coil to enhance the driving torque of the actuator. In this study, we analyzed the effect of the yoke on the resonant frequency of the actuator, as well as the torsion moment. We also experimentally determined the relationship between the resonant frequency and the magnetic gap of the yoke. Compared with the mechanical resonant frequency in the experiments, which was designed to be 50 Hz, the frequency was modified to 57.4 Hz, 54.7 Hz and 52.9 Hz when the gap between the yoke and the permanent magnet was 1.5 mm, 1.7 mm and 1.9 mm, respectively. The proposed actuator, which combines a yoke with flexible torsion springs, is potentially useful as a compact optical scanner, taking advantages of both low power consumption and high reliability. Y. Bu et al. / Magnetic spring characteristic of an oscillatory actuatorwhere J was calculated to be 1.46× 10 −9 kg/m 2 using 3D modeling software.

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