Langevin bolted transducers blt with two piezoelectric ceramics inserted between the front and rear plates are widely used in ultrasonic cleaner transducers and components of underwater acoustic antennas for a fish finder 1, 2. Structural design to maximum radiating power of langevin. Smart load cell systems buy online or call 8003443965. This transducer has a set of piezoceramic components sandwich between a cylindrical back mass and an exponential front mass connected by a prestressed bolt. Albudairi, hassan dakhil 2012 design and analysis of. Introduction to the theory and design of sonar transducers.
The finite element analysis software can calculate the transducer modal and. Sonication to partially fluidize a micropackedbed reactor to reduce gaschanneling. Dynamics modeling and control of a vshaped ultrasonic. Design and construction of a boltclamped langevin transducer. Langevintype transducer reactor, direct coupling 20 khz, 1050 w silicon microreactor. Finetuning the design of piezoelectric transducers with. Ultrasonic transducers are key components in sensors for distance, flow and level measurement as well as in power, biomedical and other applications of ultrasound. Finally the control of the vibration amplitude is illustrated with experimental and simulation results in the last part. This changed when paul langevin and his colleagues created the first. Therefore underwater sonar transducer design engineers generally start learning the basic principles from textbooks, while working in this field.
Langevin piezoelectric ultrasonic transducer underwater ultrasonic, find complete details about langevin piezoelectric ultrasonic transducer underwater ultrasonic,ultrasonic langevin transducer,high power ultrasonic transducer,small ultrasonic transducer from supplier or manufacturershenzhen wonstron technology co. The langevin transducer is composed of a couple of piezoelectric disks poled along y direction but with opposite polarities. Designing a hollow langevin transducer for ultrasonic coring. Index terms langevin s transducer, matlabsimulink model, 3d model, resonance frequency characteristics. Ca2000581c ca002000581a ca2000581a ca2000581c ca 2000581 c ca2000581 c ca 2000581c ca 002000581 a ca002000581 a ca 002000581a ca 2000581 a ca2000581 a ca 2000581a ca 2000581 c ca2000581 c ca 2000581c authority ca canada prior art keywords means ultrasonic operation device oscillation piezoelectric transducer prior art date 19890427 legal status the legal status is an. The considered input parameters were working frequency, maximum crosssectional. The model is based on websters wave propagation equation and as an objective function the minimization of the volume in structural equilibrium conditions was considered.
Most importantly, by using its natural longitudinal vibration in combination with. Whether it is a twopiece or multipieces piezoelectric assembly of the langevinc transducer, we can adjust them in accordance with. A new topological structure for the langevintype transducer has been proposed and investigated. A new topological structure for the langevintype ultrasonic. Design and analysis of ultrasonic horns operating in multiple. Our engineering services for designing complete ultrasound transducers are including. The electromechanical equivalent circuit 6, 7, 8, 9 of.
Abstract the vibrational behavior of sandwich transducer with coupled vibration is investigated by using commercial fem softwaree a design method for. Here, the sound pressure level is for the transducer design. Langevins ultrasonic vibrators fuji ceramics corporation. French physicist paul langevin made a sandwich ultrasonic transducer with. A new horn for high displacement amplification is developed. In this work we present a novel approach to the design a longitudinaltorsional lt ultrasonic horn which adapts the front mass in a traditional langevin transducer. Modelling, identification and control of a langevin transducer. Therefore, the above design was used for the ultrasonic horn figure 2c and attached to the bolt. Combining modes of vibration, such as longitudinal and torsional vibration, is advantageous in many ultrasonic applications such as ultrasonic drilling, welding, and motors. Bolt clamped langevin type transducersceramicsproducts.
Industrial processors uip, which are ultrasonic langevin transducers made by. Multiphysisc software to solve differential equations, analyzing the parameters by finite. High mechanical quality factor and excellent electroacoustic conversion efficiency, providing high output amplitude. Smbltd45f40h boltclamped langevin type transducers blt are common vibration sources in highpower ultrasonic applications such as ultrasonic cleaning tanks, ultrasonic plastic welding, ground sonar transducer, bio diesel mixer transducer, solid separation transducer, stop organism growth on boat hull, biodiesel mixing transducer, hightorque traveling wave ultrasonic motor. Bolted langevin ultrasonic transducer comsol multiphysics. An optimization method of the vibrating horns is presented considering the smallest action principle and the attached cutting tool mass. Design of a bezierprofile horn for high displacement. Model e188 and tr2465 are ultrasonic air transducers that operate at frequencies of 220 khz and 150 khz respectively. The chamber is made out of materials that can sustain. One of these is optimised by finite element modelling and is then manufactured and analysed experimentally. A design method of the horn using an optimization scheme and finite element analyses is developed. We then produce transducer specifications, mechanical design and electrical documentation. Through bolton presstress, mechanical and amplitude have been improved.
Sound pressure level distribution in front of the transducer. A matlabsimulink 3d model of unsymmetrical ultrasonic. A longitudinal movement of each single langevintype ultrasonic transducer is excited. Check out an example of analyzing such a device in the comsol software here. A power langevin type transducer was designed and constructed using a pzt4 ceramic and two metallic elements one of steel and one of aluminum. The design of the piezoelectric actuator was based on a langevin transducer. An actuator consists of a halfwavelength langevin transducer and an aluminum plate that is mounted in the middle of the transducer. Furthermore, it is possible for stable operation with high electroacoustic conversion efficiency and less heat generation. The design and construction of a boltclamped langevin type transducer is presented in conjunction. Because piezoelectric ceramics is mechanically combined, the transducer is very durable free from damage even under the high amplitude vibrations. A matlabsimulink model of a langevins ultrasonic power.
Theory and design of langevin transducers langevin boltclamped transducers were invented originally for underwater sonar applications. Development of a new ultrasonic actuator based on langevin. Sample output of piezo drive software showing possible operation. Dynamics modeling and control of a vshaped ultrasonic motor.
Langevin bolted, ultrasonic transducer, equivalent circuit, ansys to cite this article pak myongil, ri uihwan, an yongnam, structural design to maximum radiating power of langevin bolted ultrasonic transducer, engineering physics. A fe software package abaqus is implemented for this analysis. Smbltd60f15h boltclamped langevin type transducers blt are common vibration sources in highpower ultrasonic applications such as ultrasonic cleaning tanks, ultrasonic plastic welding, ground sonar transducer, bio diesel mixer transducer, solid separation transducer, stop organism growth on boat hull, biodiesel mixing transducer, hightorque traveling wave ultrasonic motor. Utilizing a hitec designed and manufactured custom strain gagebased transducer, provides freedom by eliminating the need to adapt standard offtheshelf transducers. Calculation of the acoustical behavior of the piezo composite transducer using analytical and numerical methods. Langevin type transducer langevin transducer was invented in 1922 11 by paul langevin. Boltclamped langevin type transducers blt are common vibration sources in highpower ultrasonic applications such as ultrasonic cleaning tanks, ultrasonic plastic welding, ground sonar transducer, bio diesel mixer transducer, solid separation transducer, stop organism growth on boat hull, biodiesel mixing transducer, hightorque traveling. Abstract the design and construction of a boltclamped langevin type transducer is presented in conjunction with its 3d analysis using finite element analysis fea. The dimensions of the initial design of the l mode langevin transducer are derived from the principles of the wave equation.
Data logging software for model dpm3 load cell display, model ssi hand held display and model sst transmitters. But when i measure sweep the transducer impedance z vs frequency with the impedance analyzer i see the minimum. Designing a hollow langevin transducer for ultrasonic. Our design team has the expertise and the resources to optimize all types of piezo sensor and piezo transducer. The equivalent circuit of the langevin transducer is simulated with pspice software orcad 16. The flange allows the mounting of the langevin transducer at the. Piezoelectric element offer a high speed of vibration. Design and calculation of matching and backing layers to improve bandwidth and acoustical coupling. Unictrons langevin piezoelectric transducer is a kind of piezoelectric transducer which can generate the specified force and vibration displacement. The finite element analysis software can calculate the transducer modal and harmonic response, and the results can be used to compare with theoretical design. See more workshops im looking for workshops at my location.
Langevintype transducer reactor, direct coupling 38 khz, 20 w. Design and analysis of ultrasonic horns operating in. And it is very important to attain a maximum ratio of vibrating velocities of the front and rear plates of transducers in radiating medium by choosing the optimal. The admittance and admittance phase comparisons between the simulation and experimental results are shown in fig. Design of ultrasonic transducers by means of the apparent elasticity method 297 where. Fea modelling with atila software and mechanical interfacing. The characteristics of a langevin transducer are studied using a combination of numerical and experimental techniques, which reveal the effect of minor design changes on its performance. Pdf design and construction of a boltclamped langevin transducer. We start with an in depth facetoface discussions to understand measurement requirements.
This ultrasonic transducer, the piezoelectric element in between the metal block is nipped, is the ultrasonic vibrator of integral structure. In this study, a new designed langevin transducer which employs geometrical modifications on transducer front mass. Design and finite element simulation of an ultrasonic transducer of two piezoelectric discs subject. Researching the design model effect to the characteristic. The preload on the transducer ceramics is increased and the effect on the performance is measured. Finetuning the design of piezoelectric transducers with simulation. Part one provides an overview of materials and design of ultrasonic transducers. Strain gauges have proven their value in the electrical measurement of mechanical quantities and play a fundamental role in the design of various transducers for force, pressure, or torque as well as load cells. Driving an inductive piezoelectric transducer with class e. Introduction implementation of ultrasonic transducers began in 1917, when paul langevin designed the first piezoelectric sandwich transducer 1. The considered input parameters were working frequency, maximum crosssectional area. Hi all, is there anyone who designed ultrasonic cleaning transducer bolted langevin transducer. Ca2000581c ultrasonic surgical operation device using.
Design and finite element simulation of an ultrasonic. The two cylindrical terminal blocks are conically shaped with four support plates each, and two cooling fins are disposed at the bottom of the terminal blocks, adjacent to the piezoelectric rings. At maximum preload the results of an experimental modal analysis are used to determine the. A langevin transducer is a composite resonator, and consists of a stack of piezoelectric elements sandwiched between two metal blocks. Sunnytec langevin ultrasonic transducer for cleaning. A unique design feature results in the air transducer having a narrow directional pattern completely free of side lobes. Langevin france, it has been called a langevin type vibrator. The ultrasonic actuation of the horn exploits the first longitudinal displacement mode of the horn. A new ultrasonic actuator based on a bendingtype langevin piezoelectric transducer has been developed. Figure 1 shows the transducer structure which is composed of two piezoceramic disks sandwiched between two masses and assembled by a titanium central bolt. Bolt clamped langevin type transducers ceramics blt for cleaner. The vibrational behaviour and design of langevin transducer. The symmetric mode and the asymmetric mode are computed using commercial. Designing a piezoelectric transducer is an inherently multiphysics.
Using the ansys software tool the basic characteristics such as dielectric, mechanical and. Structural design to maximum radiating power of langevin bolted. The horn was generated by cutting an aluminum alloy cylinder with a diameter of 40 mm with a nc milling machine mdx. Ultrasonic sandwich transducer, also known a langevins transducer, is a halfwave resonant structure which employs a high frequency high voltage to generate mechanical vibrations, with the help of piezoelectric effect. I do the calculations using lc2f and adjust the length of the transducer to the frequency i try to work. Oscar bryans book provides an excellent introduction to the theory and design of sonar transducers, as the title of his book suggests. Langevin piezoelectric ultrasonic transducer underwater. G 10 the measured and the predicted transducer admittance are showninfig.
You can also plot the acoustic pressure or the mechanical stress where the transducer is coupled to the air. A new topological structure for the langevin type transducer has been proposed and investigated. Could you suggest me how to adjust its resonance frequency. We are experienced in all aspects of transducer design from acoustics and damping to adhesive technology and we have the capability to fine tune piezo materials and to match drive circuitry to transducer characteristics for high performance in critical systems. Part one provides an overview of materials and design of ultrasonic. Piezoelectricity and basic configurations are explored in depth, along with electromagnetic acoustic transducers, and the use of ceramics, thin film and.
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