A rotary microgripper with locking function via a ratchet mechanism
A rotary microgripper with locking function via a ratchet mechanism
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DOI：
10.1088/0960-1317/26/1/015008
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发表时间：
2016-01-01
影响因子：
2.3
通讯作者：
Chang, H.
中科院分区：
文献类型：
--
作者：
Hao, Y.;Yuan, W.;Chang, H.
提出了一种由棘轮机构实现锁定功能的旋转微夹持器。棘轮机构能够实现长时间夹持，而不必连续施加外部激励信号，例如电场、热场或磁场。因此，可以显著减少由外部激励信号引起的对被夹持的微尺度物体的损坏。针对棘轮机构的磨损问题，提出了一种逻辑控制策略。通过增加啮合线的长度来提高微夹钳的稳定性。微夹持器是由一个改进的绝缘体上硅无切割工艺制造，以保护在制造过程中损坏的微妙的器件结构。该微夹钳具有离散的开口范围，根据当前的设计参数，可以处理尺寸为20 μ m、40 μ m和60 μ m的微小尺度物体。对花粉细胞进行了夹持实验，形成三角形，以证明该夹持器用于生物细胞夹持的可行性。
This paper presents a rotary microgripper with locking function enabled by a ratchet mechanism. The ratchet mechanism enables long-time gripping without having to continuously apply the external excitation signal such as the electrical, thermal or magnetic field. Thus the damage to the gripped micro-scale objects caused by the external excitation signals can be significantly reduced. A logic control strategy is proposed to solve the wearing problems of the ratchet mechanism. The stability of the microgripper is improved by increasing the length of the engaged line. The microgripper is fabricated by an improved silicon-on-insulator dicing-free process to protect the delicate device structure from damage during fabrication. The microgripper has a discrete opening range and can handle microscale objects with a size of 20 mu m, 40 mu m and 60 mu m based on the current design parameters. A pick-lock-release gripping experiment on a magnolia pollen cell is performed to form a triangle to prove the feasibility of the gripper in handling biological cells.