A new method of determining the equivalent circuit parameters of piezoelectric resonators and analysis of the piezoelectric loading effect

Kim, J.S.; Choi, K.; Yu, In Kyu

doi:10.1109/58.251294

Cited by 17 publications

(7 citation statements)

References 5 publications

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“…In the last few years, a variety of approaches have been introduced for obtaining piezoelectric impedance characteristics [1,2,[4][5][6][7][8][9][10]. A knowledge of such impedance characteristics is important for, structural health monitoring [10,11] and for electrical circuit modelling [6,8] of the piezoelectric devices. In the case of high power applications, knowledge of the impedance characteristics is important so that maximum transmission performance can be achieved [5,[12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…As the figure shows, piezoelectric devices typically have two kinds of electrical resonances, the first one known as resonant frequency (f r ) and the other one known as anti-resonant frequency (f a ) [3]. In the last few years, a variety of approaches have been introduced for obtaining piezoelectric impedance characteristics [1,2,[4][5][6][7][8][9][10]. A knowledge of such impedance characteristics is important for, structural health monitoring [10,11] and for electrical circuit modelling [6,8] of the piezoelectric devices.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Power converters design and analysis for high power piezoelectric ultrasonic transducers

Ghasemi

Zare

2014

2014 16th European Conference on Power Electronics and Applications

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High power piezoelectric ultrasonic transducers have been widely exploited in a variety of applications. The critical behaviour of a piezoelectric device is encapsulated in its resonant frequencies because of its maximum transmission performance at these frequencies. Therefore power electronic converters should be tuned at those resonant frequencies to transfer electrical power to mechanical power efficiently. However, structural and environmental changes cause variations in the device resonant frequencies which can degrade the system performance. Hence, estimating the device resonant frequencies within the incorporated setup can significantly improve the system performance. This paper proposes an efficient resonant frequency estimation approach to maintain the performance of high power ultrasonic applications using the employed power converter. Experimental validations indicate the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power converters design and analysis for high power piezoelectric ultrasonic transducers

Ghasemi

Zare

2014

2014 16th European Conference on Power Electronics and Applications

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“…In (15), Ce and Re are the capacitance and resistance in parallel respectively. Solving the motion equation of piezoelectric ceramics, a2 -= 2a2j at2 aZ 2 (16) where 4 is the particle displacement of piezoelectric ceramics, r is the time, and V is the velocity of longitudinal wave produced by piezoelectric ceramics, C33 (17) p where p is the density of piezoelectric ceramics, we have the simple harmonic solution of particle displacement -St sink(t-z)-e2 sinkz sin kz…”

Section: A New Methods Ofcalculating Dissipationfactorsmentioning

confidence: 99%

Characterization and Evaluation of Smart Concrete Modules Embedded with Piezoelectric Devices

Wen

Chen

2006

2006 5th IEEE Conference on Sensors

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The sensory behaviors of the concrete modules embedded with piezoelectric devices (PZT element) are characterized. Such PZT-embedded concrete modules demonstrate sensitivity to the load applied on the modules. In this case, the load produces stress in the concrete module, which is detected by measuring the equivalent circuit parameters (equivalent parameters for short) of the PZT element embedded in the module. In spite of stress, temperature also leads to the changes of the equivalent parameters of the PZT element, which makes it difficult to identify the effects of the stress and temperature on the PZT elements. However, it is also found that the characteristic frequencies are quite sensitive to temperature but have little dependence on stress. Such feature enables the characteristic frequencies to be used as reference parameters when the PZT elements are affected by both stress and temperature. In order to characterize the energy losses of the PZT element embedded in the concrete module, complex physical coefficients are introduced to the piezoelectric equivalent model, and a new method is proposed to calculate three dissipation factors which are used to represent the level of different energy losses respectively. In this method, the dissipation factors are looked as the function of the equivalent parameters of piezoelectric devices in specific mode, which simplified the computing of the dissipation factors.I.

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“…So it is reasonable to develop a method for monitoring the stress level by detecting the change in physical coefficients. Several instrumental methods have been developed to measure the equivalent circuit parameters and characteristics of the circuit (Gerber, 1953;Kim et al, 1993;IRE standards, 1961). Based on the relationship between the equivalent parameters and the complex coefficients, while the values of the equivalent circuit components are measured by a network analyzer under varying stress levels, the effects of stress on the characteristics of the embedded PZT ceramic are observed.…”

Section: Principlesmentioning

confidence: 99%

Smart Concrete with Embedded Piezoelectric Devices: Implementation and Characterization

Wen

Chen

et al. 2007

Journal of Intelligent Material Systems and Structures

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A scheme for monitoring concrete structures, by embedding PZT ceramics into concrete modules has been proposed previously. These modules can be used as building blocks in the infrastructure engineering. Owing to the piezoelectric device embedment, the blocks are sensitive to ambient condition changes including stress, temperature, and humidity. It is suggested that by measuring the equivalent circuit parameters of embedded piezoelectric ceramics, the structural-static or quasi-static state may be interrogated. The equivalent circuit parameters of a piezoelectric device represent the characteristics of the piezoelectric, dielectric, and mechanical performances. By analyzing the parameters, the signal related to the structural-mechanical state can be acquired. Theoretically, a piezoelectric device can be modeled as a multiple-input-multiple-output transducer. In practice, the problem remains that the equivalent parameters, the sensing outputs, are also dependent on the ambient settings such as temperature which may cause either expansion or shrinkage. However, through dozens of experiments with smart concrete specimens embedded with piezoelectric elements and piezoelectric elements free of embedment, it is observed that the characteristic frequencies (anti-resonance and resonance) are quite sensitive to temperature but have little dependence on stress. This way, by sensing data fusion, the characteristic frequencies are used as temperature indicators to remove the variation in equivalent circuit parameters resulting from temperature, exclusive of using additional sensors for compensation. In turn, the structural stress-monitoring (static or quasi-static) through the detection of the equivalent circuit parameters is achieved.

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A new method of determining the equivalent circuit parameters of piezoelectric resonators and analysis of the piezoelectric loading effect

Cited by 17 publications

References 5 publications

Power converters design and analysis for high power piezoelectric ultrasonic transducers

Power converters design and analysis for high power piezoelectric ultrasonic transducers

Characterization and Evaluation of Smart Concrete Modules Embedded with Piezoelectric Devices

Smart Concrete with Embedded Piezoelectric Devices: Implementation and Characterization

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