| 摘要 |
PROBLEM TO BE SOLVED: To decrease the number of materials by making a distortion censer serve also as an actuator. SOLUTION: A previously distorted shape-memory alloy (SMA) wire embedded in a matrix material of a composite material detects deformation or distortion of the composite material, and restrains and restores damages of the composite material by its contracting and restoring power (actuator functions). A processor detects an electric resistance of the SMA wire by a resistance detecting circuit, calculates the changes in the resistance caused by distortion by a processor (CPU), and generates restoring power for the SMA wire to self-restrain and self-restore the composite material. The SMA wire embedded in the composite material is utilized not only as the actuator for restraining and restoring damages but also as a censor for detecting distortion, deformation and damages. Thus, the number of materials used for the composite material can be decreased. The temperature compensation of the resistance of the SMA wire can be made by providing another SMA wire in an unloaded state to measure the resistance of the SMA wire. COPYRIGHT: (C)2004,JPO |
