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    • 1. 发明申请
    • A METHOD FOR CALCULATING FREQUENCY CHARACTERISTICS OF PIEZOELECTRIC MATERIAL NON-LINEARLY ACCORDING TO TEMPERATURE RISING
    • 压电温度非线性压电材料频率特性的计算方法
    • WO2007013702A1
    • 2007-02-01
    • PCT/KR2005/001874
    • 2005-06-17
    • SAMHWA YANG HENG CO., LTD.LEE, Chang-HwanJOO, Hyun-Woo
    • LEE, Chang-HwanJOO, Hyun-Woo
    • G06F17/10
    • G01K7/32H01L41/107
    • The invention relates to a method of obtaining a frequency characteristic depending on temperature change of a piezoelectric material in a non-linear manner, comprising steps of: (a) calculating a resonant frequency of a piezoelectric material at a predetermined temperature; (b) calculating a temperature of the piezoelectric material under predetermined resonant frequency; (c) obtaining a material constant of the piezoelectric material under predetermined temperature condition; (d) calculating a temperature of the piezoelectric material using the material constant; (e) repeating the steps (c) and (d) until the temperature is converged; (f) calculating a changed resonant frequency under converged temperature; (g) calculating a converged temperature by performing the steps (b) to (e) under resonant frequency obtained in the step (f); and (h) repeating the steps (f) and (g) until the converged temperature is converged.
    • 本发明涉及一种以非线性方式获得取决于压电材料的温度变化的频率特性的方法,包括以下步骤:(a)计算在预定温度下的压电材料的共振频率; (b)计算预定谐振频率下的压电材料的温度; (c)在预定温度条件下获得压电材料的材料常数; (d)使用材料常数计算压电材料的温度; (e)重复步骤(c)和(d)直到温度收敛; (f)在会聚温度下计算出改变的共振频率; (g)通过在步骤(f)中获得的共振频率下执行步骤(b)至(e)来计算会聚温度; 和(h)重复步骤(f)和(g),直到收敛温度收敛。
    • 5. 发明申请
    • A METHOD FOR ANALYZING FREQUENCY CHARACTERISTICS OF PIEZOELECTRIC MATERIAL
    • 一种分析压电材料频率特性的方法
    • WO2006132451A1
    • 2006-12-14
    • PCT/KR2005/001870
    • 2005-06-17
    • SAMHWA YANG HENG CO., LTD.LEE, Chang-HwanJOO, Hyun-Woo
    • LEE, Chang-HwanJOO, Hyun-Woo
    • G06F17/10
    • G01H13/00G01N27/02
    • Disclosed is a method of calculating an impedance depending on frequencies of a piezoelectric material, comprising steps of: (a) Taylor series-expanding each matrix of a characteristic equation related to a frequency of a piezoelectric material with regard to a start frequency; (b) comparing coefficients of a same order of both terms in the Taylor series- expanded equation to obtain a recursive equation relating to a moment of a matrix exhibiting a mechanical displacement and an electric potential of the characteristic equations; (c) calculating each moment of the matrix from the recursive equation; (d) approximating the matrix to a Pade' approximate function; (e) calculating a coefficient of the Pade' approximate function in the step (d) from the equation obtained in the step (c); (f) calculating a solution of the matrix from the Pade' approximate function obtained in the step (e); and (g) calculating an impedance from the solution.
    • 公开了一种根据压电材料的频率计算阻抗的方法,包括以下步骤:(a)泰勒级数展开与压电材料的频率相关的特征方程相对于起始频率的每个矩阵; (b)比较泰勒级数扩展方程中两项相同阶数的系数,得到与特征方程的机械位移和电位的矩阵的力矩有关的递归方程; (c)从递归方程计算矩阵的每个时刻; (d)将矩阵近似为Pade'近似函数; (e)从步骤(c)中获得的方程计算步骤(d)中帕德'近似函数的系数; (f)从步骤(e)中获得的Pade'近似函数计算矩阵的解; 和(g)从该溶液计算阻抗。