• 제목/요약/키워드: 압전소자구동기

검색결과 6건 처리시간 0.023초

압전소자률 이용한 다중빔 광디스크용 빔 회전 구동기 (Piezoelectric Beam Rotating Actuator for Multiple Beam Disk Drives)

  • 김병준;김수현;곽윤근
    • 한국정밀공학회지
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    • 제17권5호
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    • pp.154-159
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    • 2000
  • A multi-beam optical disk drive is presented as a method for improving the effective data transfer rate by increasing the beam spot number formed on an optical disk. The beam rotating actuator is necessary for putting multi-beam on more than one track. The beam rotating actuator is made up of piezoelectric material, high stiffness wire hinge and dove prism. The actuator has good frequency response above 1KHz and suitable operational range. The dynamic equation for the actuator is derived.

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압전구동기를 이용한 정밀 가공용 초음파 진동장치 해석 및 실험 (Analysis and Experiment of Ultrasonic Vibration Mechanism using PZT Actuator for Precision Laser Machining)

  • 김우진;전용호;조성학
    • 한국정밀공학회지
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    • 제28권12호
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    • pp.1347-1352
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    • 2011
  • Recently, as the aged population grows around the world, many medical instruments, devices, and their fabrication processes are developing. Among the devices, a drug delivery stent is a good example for precision machining. Conventional drug delivery stent has problem of the remaining polymer because the drug is coated on the surface with it. If the drug is impregnated into the micro hole array on the stent surface, the polymer can be perfectly eliminated. Micro sized holes are generally fabricated by laser machining however, the fabricated holes do not have an enough aspect ratio to contain the drug or a good surface finish to deliver the stend to blood vessel tissue. To overcome these problems, we propose a vibration-assisted machining mechanism with PZT (Piezoelectric Transducers) for abrication of micro sized holes better. The results indicated that the burr size can be significantly decreased with vibration assisted in nanosecond pulse laser drilling test.

압전구동기를 이용한 정밀 가공용 초음파 진동장치 설계 (Design of Ultrasonic Vibration Device using PZT Actuator for Precision Laser Machining)

  • 김우진;;조성학;박종권;이문구
    • 한국레이저가공학회지
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    • 제14권2호
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    • pp.8-12
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    • 2011
  • As the aged population grows around the world, many medical instruments and devices have been developed recently. Among the devices, a drug delivery stent is a medical device which requires precision machining. Conventional drug delivery stent has problems of residual polymer and decoating because the drug is coated on the surface of stent with the polymer. If the drug is impregnated in micro hole array on the surface of the stent, the problem can be solved. Micro sized holes are generally fabricated by laser machining; however, the fabricated holes do not have an enough aspect ratio to contain the drug or a good surface finish to deliver it to blood vessel tissue. To overcome these problems, we propose a vibration-assisted machining mechanism with PZT (Piezoelectric Transducers) for the fabrication of micro sized holes. If the mechanism vibrates the eyepiece of the laser machining head, the laser spot on the workpiece will vibrate vertically because objective lens in the eyepiece shakes by the mechanism's vibration. According to the former researches, the vibrating frequency over 20kHz and amplitude over 500nm are preferable. The vibration mechanism has cylindrical guide, hollowed PZT and supports. In the cylinder, the eyepiece is mounted. The cylindrical guide has upper and low plates and side wall. The shape of plates and side wall are designed to have high resonating frequency and large amplitude of motion. The PZT also is selected to have high actuating force and high speed of motion. The support has symmetrical and rigid characteristics.

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고속 광학기록매체용 다중빔 회전 구동기의 개발 (The Development of Beam Rotating Actuator for High Speed Optical Disk Storage)

  • 김병준;김수현;곽윤근
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.1072-1075
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    • 1997
  • To enhance the effective data transfer rate the multi-beam optical disk drive is presented. The Beam rotating actuator is necessary for putting multi-beam on more than one track. Ray tracing was also executed for real system set-up. The Beam Rotating Actuator is made up of piezoelectric material, high stiffness wire hinge and dove prism. The actuator has about 1kHz natural frequency and suitable and suitable operational range. The dynamic equation for the actuator is derived for the control of real system.

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다중빔 광디스크용 빔 회전 구동기의 제작과 특성평가 (The Development and Performance Analysis of Beam Rotating Actuator for Multi-Beam Disk Drive)

  • 김병준;김수현;곽윤근
    • 대한기계학회논문집A
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    • 제24권12호
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    • pp.3026-3032
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    • 2000
  • To enhance the effective data transfer rate the multi-beam optical disk drive is presented. The Beam rotating actuator is necessary for putting multi-beam on more than one track. Ray tracing was also executed for real system set-up. The beam Rotating Actuator is made up of piezoelectric material, high stiffness wire hinge and dove prism. The actuator has about 1kHz natural frequency and suitable operational range. The dynamic equation for the actuator is derived for the control real system.