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Precise Experimental Determination of Electrical Equivalent Circuit Parameters for Ultrasonic Piezoelectric Ceramic Transducers from Their Measured Characteristics
Ultrasonics ( IF 4.2 ) Pub Date : 2021-04-01 , DOI: 10.1016/j.ultras.2020.106341
Přemysl Janů , Josef Bajer , Pavel Dyčka , Radek Bystřický

The letter is devoted to a method for determining electric equivalent circuit parameters of piezoelectric ceramic transducers from their resonance characteristics. These parameters represent equivalents of mechanical damping, effective weight of the oscillating element, compliance of the mechanical element and static capacitance associated with the transducer material. This method is considered cost efficient, focuses on transducers commonly available on the market and is presented on a specific transducer - transmitter. The acquired parameters are important for performing subsequent simulations and defining their suitability for a particular application. However, these parameters are not included in the usual technical documentation of the commercially available piezoelectric ceramic transducers. The key part of this letter is an iterative process of finding the parameters. Before starting the iteration process, it is very important to set default values of these parameters. Then, a linearized system of equations, based on expressing a real part of the impedance, is used to determine these parameters. The advantage of this method is its simplicity to measure only the two above-mentioned characteristics, from which the required parameters can be then calculated. Thus, there is no need for expensive circuit analyzers, which are able to determine these parameters directly. Although the iterative process includes a large number of steps, and therefore can be relatively time consuming, it can be performed on a commercially available computer technology.

中文翻译:

超声压电陶瓷换能器电等效电路参数从测量特性精确实验确定

该信致力于一种从谐振特性确定压电陶瓷换能器等效电路参数的方法。这些参数代表机械阻尼的等效值、振荡元件的有效重量、机械元件的顺应性以及与换能器材料相关的静态电容。这种方法被认为具有成本效益,侧重于市场上常见的换能器,并针对特定的换能器 - 变送器进行介绍。获取的参数对于执行后续模拟和定义它们对特定应用的适用性非常重要。然而,这些参数不包括在市售压电陶瓷换能器的常用技术文件中。这封信的关键部分是寻找参数的迭代过程。在开始迭代过程之前,设置这些参数的默认值非常重要。然后,基于表示阻抗实部的线性化方程组用于确定这些参数。这种方法的优点是它可以简单地仅测量上述两个特征,然后可以从中计算出所需的参数。因此,不需要能够直接确定这些参数的昂贵的电路分析仪。尽管迭代过程包括大量步骤,因此可能相对耗时,但它可以在商用计算机技术上执行。设置这些参数的默认值非常重要。然后,基于表示阻抗实部的线性化方程组用于确定这些参数。这种方法的优点是它可以简单地仅测量上述两个特征,然后可以从中计算出所需的参数。因此,不需要能够直接确定这些参数的昂贵的电路分析仪。尽管迭代过程包括大量步骤,因此可能相对耗时,但它可以在商用计算机技术上执行。设置这些参数的默认值非常重要。然后,基于表示阻抗实部的线性化方程组用于确定这些参数。这种方法的优点是它可以简单地仅测量上述两个特征,然后可以从中计算出所需的参数。因此,不需要能够直接确定这些参数的昂贵的电路分析仪。尽管迭代过程包括大量步骤,因此可能相对耗时,但它可以在商用计算机技术上执行。这种方法的优点是它可以简单地仅测量上述两个特征,然后可以从中计算出所需的参数。因此,不需要能够直接确定这些参数的昂贵的电路分析仪。尽管迭代过程包括大量步骤,因此可能相对耗时,但它可以在商用计算机技术上执行。这种方法的优点是它可以简单地仅测量上述两个特征,然后可以从中计算出所需的参数。因此,不需要能够直接确定这些参数的昂贵的电路分析仪。尽管迭代过程包括大量步骤,因此可能相对耗时,但它可以在商用计算机技术上执行。
更新日期:2021-04-01
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