The Energy-Saving Resonant Cradle Design

• Main Authors: WANG CHIA-WEI, 王嘉帷
• Other Authors: CHAO CHUN-TANG
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/02106054462831170539

碩士 === 南臺科技大學 === 電機工程系 === 104 === This paper proposes an energy-saving resonant cradle design, employing the currently popular Arduino UNO, an open-source electronics platform, as the core processor. For most commercially available electric cradles, the drive motor is closely combined with the bearing on the top. It will lead to an over damped system and result in a lot of energy consumption and noise. In this proposal, a ball bearing design was adopted to reduce friction and make an under damped system. It can also greatly reduce the noise while the cradle is swinging. Furthermore, the driving force is under the cradle to increase the distance from the object to fulcrum and torque. A DC motor was installed under the cradle as the driving force, and the blades were spaced at a distance and tightly bounded under the cradle body. A small wooden hammer is linked to the motor to strike the blade and drive the cradle. The infrared sensor and grayscale ribbon are designed to detect the oscillation state, and then the force is driven at the critical time to achieve the maximum output response while saving energy according to the principle of resonance. Experimental results show that the energy consumption of the commercially available electric cradle is over twice that of the proposed design.