Model-Based Analysis and Regulating Approach of Air-Coupled Transducers with Spurious Resonance

Peng, Xiangxiang; Hu, Liang; Liu, Wei-Ting; Fu, Xin

doi:10.3390/s20216184

Cited by 6 publications

(7 citation statements)

References 25 publications

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“…When receiving pressure, the pressure in the chamber increases and is transmitted to the pressure gauge for measurement. Based on the contents of the chamber, pressure transducers can be divided into pneumatic transducers and hydraulic transducers (Peng et al, 2020;Rosier, 2020).…”

Section: Pressure Transducermentioning

confidence: 99%

Bite Force Transducers and Measurement Devices

Bai

Xie

2021

Front. Bioeng. Biotechnol.

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In dental research, bite force has become an important curative effect evaluation index for tooth restoration, periodontal treatment, and orthodontic treatment. Bite force is an important parameter to evaluate the efficacy of the masticatory system. Physicians obtain the therapeutic basis for occlusal adjustment by measuring the bite force and the dynamic changes in occlusal contact at different stages of treatment and objectively evaluate the therapeutic effect. At present, many devices are used to record the bite force. Most of these devices use force transducers to detect bite force, such as strain gauge transducers, piezoresistive transducers, piezoelectric transducers, optical fiber transducers, and pressure-sensitive films. This article summarizes the various equipment used to record bite force, related materials and the characteristics of this equipment. It provides a reference for physicians to make choices during the clinical process and at the same time provides a basis for the development of new occlusal force measurement materials.

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Section: Pressure Transducermentioning

confidence: 99%

Bite Force Transducers and Measurement Devices

Bai

Xie

2021

Front. Bioeng. Biotechnol.

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“…The detected power and voltage are compared with the threshold power, P th , and voltage, V th , including the information of the transmission signal, and then the deviation is calculated. From the deviation, the variation of the modulation index (MI) is expressed in Equation (9).…”

Section: The Control Of the Sonar Transmitter 41 The Control Methodsmentioning

confidence: 99%

“…To design the sonar transmitter, the circuit diagram is shown in Figure 2. Here, the BVD (Butterworth-Van Dyke) model is used for the equivalent circuit model of the transducer [3,9,21]. The transmitter's topology consists of the full-bridge inverter converting DC to AC, a low-pass output filter reducing THD, and a matching circuit using a magnetizing inductance of the transformer.…”

Section: Design Processmentioning

confidence: 99%

“…In recent years, the applications of acoustic transducers and transmitters have been expanded for sonar, medical, communications, and industrial purposes [1][2][3][4][5][6]. The mechanical and acoustic operations of an acoustic transducer are generally expressed as an electrical equivalent circuit model [7][8][9]. An electrical equivalent circuit is necessary not only to understand the energy transfer phenomenon, but also to design a transmitter driving an acoustic transducer.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Design of a Sonar Transmitter for the High-Power Control of Multichannel Acoustic Transducers

et al. 2021

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For driving multichannel underwater acoustic transducers, the integrated design of the transmitter based on the analysis of the widely distributed impedance should be considered. Previous studies focused on either the matching circuit or the fast resonant tracking control. This paper proposes the design and control methods of a sonar transmitter based on the analysis of the impedance distribution. For the transmitter design, the optimization method based on the particle swarm optimization (PSO) algorithm is proposed for estimating the equivalent and matching circuit parameters. The equivalent circuits of the transducer are more precisely designed by using the measured data in both air and water. The fitness function proposed in the matching includes special functions, such as the limitation and parasitic inductances. A comparison of the experimental and simulation results shows that the optimized matching design improved the power factor, and was similar to the experimental result. For the transmitter control, the constant power and voltage control (CPVC) and instant voltage and current control (IVCC) methods are proposed for the variable impedance load. The impedance variation range affects the rated power and rated voltage of the transmitter, and the rating range determines the initial modulation index (MI) of the pulse-width modulation (PWM) control. To verify the control method, an experimental setup including the multichannel acoustic transducers was established. As a result, the constant power and constant voltage were verified with the proposed control, and the instant voltage and current control also worked in the event that the instant voltage or current exceed their threshold values.

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“…To determine the unknown parameters of the equivalent model, particle swarm optimization (PSO) is used to minimize the fitness function value [23]. X. peng et al presented a method to minimize the estimation errors caused by the interference effect of adjacent resonant modes and to estimate the equivalent model parameters of a relatively low effective resonant mode of the transducer [24].…”

Section: Introductionmentioning

confidence: 99%

An Estimation Method of an Electrical Equivalent Circuit Considering Acoustic Radiation Efficiency for a Multiple Resonant Transducer

Lee

Baek

et al. 2021

Electronics

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The electrical equivalent model of an underwater acoustic transducer must be exactly defined in the operating frequency band to improve the driving efficiency between a sonar transmitter and a transducer. This paper used the PSO (particle swarm optimization) algorithm to estimate electrical equivalent circuit parameters of a transducer that has multiple resonant modes. The proposed method used a new fitness function to minimize the estimation error between the measured impedance of the transducer and the estimated impedance. The difference to the previous method is that the proposed method considered interference effects of the adjacent resonant modes. Additionally, this paper analyzed the effective power and separated the mechanical and acoustical resistance by considering the acoustic radiation efficiency of the transducer. As a result, the proposed method estimated all parameters at the resonance points which are influenced by the adjacent resonant modes.

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Model-Based Analysis and Regulating Approach of Air-Coupled Transducers with Spurious Resonance

Cited by 6 publications

References 25 publications

Bite Force Transducers and Measurement Devices

Bite Force Transducers and Measurement Devices

Optimized Design of a Sonar Transmitter for the High-Power Control of Multichannel Acoustic Transducers

An Estimation Method of an Electrical Equivalent Circuit Considering Acoustic Radiation Efficiency for a Multiple Resonant Transducer

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