Actuating control device for spatial-bending shape memory alloy actuator

A memory alloy and memory alloy wire technology, which is applied in the direction of mechanisms, machines/engines, and mechanical equipment that generate mechanical power, can solve problems such as use restrictions, and achieve the effects of good adaptability, wide application prospects, and compact mechanism.

Inactive Publication Date: 2009-12-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the embedded SMAA can only realize plane movement, and its use is limited in fields with space operation requirements.

Method used

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  • Actuating control device for spatial-bending shape memory alloy actuator
  • Actuating control device for spatial-bending shape memory alloy actuator
  • Actuating control device for spatial-bending shape memory alloy actuator

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and example the present invention is described in further detail.

[0015] Such as figure 1 and figure 2 As shown, the space bending SMAA includes an end fixing part 1 , a motion executing part 2 and a front connecting part 3 .

[0016] The end fixing part 1 includes an end sleeve 5 and an SMA wire fixing piece 6 , and the SMA wire fixing piece 6 is fixed in the end sleeve 5 . Such as Figure 4 As shown, the SMA wire fixing piece 6 is provided with a first central through hole 16 and n positioning holes 15, wherein, 3≤n≤6, and the n positioning holes 15 are centered on the first central through hole 16 in the SMA wire Symmetrical distribution on the fixed piece 6.

[0017] The motion executing part 2 is composed of a mold glue cylinder 7 , a "U" shape memory SMA wire 10 and a curvature sensor 4 .

[0018] Such as image 3 As shown, the second central through hole 14 and n embedded wire through holes 13 are provided o...

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Abstract

The invention discloses an actuating control device for a spatial-bending shape memory alloy actuator. The device comprises a detecting circuit, a selection and amplification circuit, a digital signal processor and a power actuation circuit, wherein the detecting circuit is used for detecting bending signals of the shape memory alloy actuator and transmitting the bending signals acquired in all directions to the selection and amplification circuit; the bending signals are transmitted to the digital signal processor after being selected and amplified; the digital signal processor calculates and determines the heating pulse time of shape memory alloy wires according to the difference between desired signals and actual signals and outputs control electric signals to the power actuation circuit; and the power actuation circuit controls the operation status of the shape memory alloy actuator by communicating and stopping the heating of the shape memory alloy wires. The actuating control device for the spatial-bending shape memory alloy actuator adopts current actuation control, has simple control mode, and is convenient for integration and miniaturization. The actuation control device for the spatial-bending shape memory alloy actuator meets the comprehensive requirement of miniaturization, precision positioning and flexible transmission and has outstanding technical advantage and potential and broad application prospects in the fields of humanoid robots, medical artificial limbs, endoscopes and the like.

Description

technical field [0001] The invention belongs to the technical field of application of functional materials, and relates to the technical field of application of shape memory alloys. Specifically, it relates to a space bending shape memory alloy driver and its drive control device. Background technique [0002] Shape memory alloy (Shape Memory Alloy, SMA) is a kind of functional material, which has shape memory effect (Shape Memory Effect, SME), that is, after SMA is subjected to high-temperature setting treatment, it is cooled to room temperature or low temperature, and an external force is applied to make SMA Plastic deformation occurs, and if the SMA is heated to a certain temperature, the plastic deformation can disappear and return to the shape memorized after high temperature setting. Using the SME of SMA, various shape memory alloy actuators (Shape Memory Alloy Actuator, SMAA) can be made. [0003] Compared with traditional electromagnetic drives, SMAA has many advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G7/06
Inventor 杨凯
Owner HUAZHONG UNIV OF SCI & TECH
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