Abstract:
본 발명은 (a) PWM 전압 신호가 인가된 SMA 코일 액추에이터의 정상 상태 전압(V steady ) 및 정상 상태 전류(I steady )를 검출하는 단계; (b) SMA 코일 액추에이터에 흐르는 전류의 과도 응답을 분석하여 nτ에 대응되는 전류 값에 도달하는 시간(t nτ )을 검출하는 단계(τ는 시정수, n은 임의의 수); (c) 검출된 V steady , I steady , t nτ 값을 이용하여 SMA 코일 액추에이터의 인덕턴스(L)를 검출하는 단계; 및 (d) 미리 저장된 SMA 코일 액추에이터의 인덕턴스와 변위 대응 관계와 SMA 코일 액추에이터의 인덕턴스(L) 값을 이용하여 SMA 코일 액추에이터의 변위를 검출하는 단계를 포함하는 코일 액추에이터의 변위 검출 방법과 이를 이용한 구동장치 및 구동 시스템을 제공한다.
Abstract:
PURPOSE: A method for detecting the displacement of a shape memory alloy (SMA) coil actuator, and an actuating device and system using the same are provided to detect the displacement of the actuator based on an inductance value from the actuator. CONSTITUTION: A method for detecting the displacement of a shape memory alloy (SMA) coil actuator includes: a step (S10) of detecting the steady state voltage (V-steady) and steady state current (I-steady) of the actuator to which a pulse width modulation (PWM) voltage signal is applied; a step (S20) of detecting time (tnτ) for reaching to a current value corresponding to nτ with analyzing the transient response of a current flowing in the actuator; a step (S30) of detecting the inductance (L) of the actuator using the values of the detected V-steady, I-steady, and tnτ; and a step (S40) of detecting the displacement of the actuator using the value of the inductance and a pre-stored corresponding relation between the inductance and the displacement. In the step of detecting the tnτ, the τ is a time constant, and the n is an arbitrary number. [Reference numerals] (AA) Start; (BB) End; (S10) Detecting the steady state voltage (V-steady) and steady state current (I-steady) of an SMA coil actuator to which a PWM voltage signal is applied; (S20) Detecting time (tnτ) for reaching to a current value corresponding to nτ (τ is time constant and n is a random number) with analyzing the transient response of a current flowing in the SMA coil actuator; (S30) Detecting the inductance (L) of the SMA coil actuator using the values of the detected V-steady, I-steady, and tnτ; (S40) Detecting the displacement of the actuator using the value of the inductance (L) and a corresponding relation between the inductance of the stored SMA coil actuator and the displacement
Abstract:
본발명은 (a) PWM 전압신호가인가된 SMA 코일액추에이터의정상상태전압(V) 및정상상태전류(I)를검출하는단계; (b) SMA 코일액추에이터에흐르는전류의과도응답을분석하여 nτ에대응되는전류값에도달하는시간(t)을검출하는단계(τ는시정수, n은임의의수); (c) 검출된 V, I, t값을이용하여 SMA 코일액추에이터의인덕턴스(L)를검출하는단계; 및 (d) 미리저장된 SMA 코일액추에이터의인덕턴스와변위대응관계와 SMA 코일액추에이터의인덕턴스(L) 값을이용하여 SMA 코일액추에이터의변위를검출하는단계를포함하는코일액추에이터의변위검출방법과이를이용한구동장치및 구동시스템을제공한다.
Abstract:
PURPOSE: A shoe with a noble shoestring system is provided to partially fasten the shoe and to stereoscopically fasten the shoe by forming a cut part on the lateral side of the shoe. CONSTITUTION: A shoe with a noble shoestring system fastens a cut part with a shoe without a sole. The cut part is formed on the lateral side of the shoe without a sole. At least two cut parts are arranged on the lateral side of the shoe without a sole. Shoestrings(400) are arranged at each cut part. One end part of a shoestring is fixed to the shoe without a sole. The middle part of the shoestring passes through both sides of the cut part.