Space bending shape memory alloy driver and drive control device thereof
A memory alloy and memory alloy wire technology, which is applied to machines/engines, mechanisms that generate mechanical power, mechanical equipment, etc., can solve problems such as use restrictions, and achieve the effects of good adaptability, light weight, and high weight ratio.
Inactive Publication Date: 2009-10-28
HUAZHONG UNIV OF SCI & TECH
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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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[0022] Below in conjunction with accompanying drawing and example the present invention is described in further detail.
[0023] Such as figure 1 with 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 .
[0024] 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.
[0025] 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 .
[0026] Such as image 3 As shown, the second central through hole 14 and n embedded wire through holes 13 are provided ...
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The invention discloses a space bending shape memory alloy driver and a driving control device thereof. The driver includes a "U" shape memory alloy wire, a plurality of curvature sensors, a mold glue cylinder, a sleeve, a shape memory alloy wire fixing piece and a positioning piece. The drive control device includes a detection circuit, a selection amplifier circuit, a digital signal processor and a power drive circuit. The invention utilizes the characteristic that the shape memory alloy has a shape memory effect with the change of temperature, and realizes the space free bending motion of the driver. The invention has the advantages of compact structure, light weight, high output force-to-weight ratio, supple action, flexible control, low manufacturing cost, multi-directional bending, space operation capability and the like. The invention satisfies the comprehensive requirements of miniaturization, precise positioning and flexible transmission, and has obvious technical advantages and potentially broad application prospects in the fields of anthropomorphic manipulators, medical prostheses and endoscopes.
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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IPC IPC(8): F03G7/06
Inventor 杨凯辜承林张德林贺晋华
Owner HUAZHONG UNIV OF SCI & TECH