Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193406
Y. Tasinkevych, E.J. Danicki
Different methods of numerical evaluation of the spatial spectrum of electric charge distribution on the IDT strips are considered in this paper. A comparison of two of them is given. Numerical results are presented to compare positive and negative features of the methods.
{"title":"Numerical efficiency of IDT charge spatial spectrum evaluation methods","authors":"Y. Tasinkevych, E.J. Danicki","doi":"10.1109/ULTSYM.2002.1193406","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193406","url":null,"abstract":"Different methods of numerical evaluation of the spatial spectrum of electric charge distribution on the IDT strips are considered in this paper. A comparison of two of them is given. Numerical results are presented to compare positive and negative features of the methods.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127700389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1192578
D. Kruse, M. Lim, D. Redline, P. Eisele, K. Ferrara
We use high frequency ultrasound to assess the effect of laser cyclophotocoagulation (CPC) on blood flow in the anterior segment of the eye. We show that laser CPC treatment applied to the rabbit eye provides a unique way to interrupt blood flow in the ciliary body, thus serving as a new method for evaluating clutter rejection performance in the microcirculation with and without an ultrasound contrast agent. We apply a recently developed eigendecomposition-based clutter rejection filter with modifications to deal with high blood-to-clutter ratio's (BCR) encountered at high frequencies, particularly with ultrasound contrast agents. In vivo results are presented to illustrate treatment effects, clutter rejection, and contrast agent enhancement.
{"title":"High frequency ultrasound with an eigen-decomposition filter to assess the effect of laser cyclophotocoagulation treatment on blood flow","authors":"D. Kruse, M. Lim, D. Redline, P. Eisele, K. Ferrara","doi":"10.1109/ULTSYM.2002.1192578","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192578","url":null,"abstract":"We use high frequency ultrasound to assess the effect of laser cyclophotocoagulation (CPC) on blood flow in the anterior segment of the eye. We show that laser CPC treatment applied to the rabbit eye provides a unique way to interrupt blood flow in the ciliary body, thus serving as a new method for evaluating clutter rejection performance in the microcirculation with and without an ultrasound contrast agent. We apply a recently developed eigendecomposition-based clutter rejection filter with modifications to deal with high blood-to-clutter ratio's (BCR) encountered at high frequencies, particularly with ultrasound contrast agents. In vivo results are presented to illustrate treatment effects, clutter rejection, and contrast agent enhancement.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127999303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193526
S. Cochran, J. Earnshaw, B. Bargain, K. Kirk
The synthetic aperture focusing (SAF) technique allows exploration of ultrasonic array imaging performance with minimal hardware and it can provide excellent imaging results for point defects, such as fatigue crack tips, commonly found in non-destructive testing (NDT). However, it performs less well when imaging defects which are flat or curved with radii large relative to the ultrasonic wavelength. Here, we report an enhanced time-domain algorithm which can deal with flat and curved defects and which we have termed "synthetic aperture correlation". It is based on processing signals from multiple overlapping subsets of elements from an entire array. The algorithm has roots in SAF, matched filtering, beam steering and biomedical ultrasonic imaging. The data collection process is the same as for SAF and the new algorithm operates entirely in reception, off-line. It has been tested using a 96-element linear array operating at 6 MHz on aluminum test objects. We present simulated and experimental results and compare these with B-scans showing timer-of-flight diffraction (TOFD) characteristics and with conventional SAF. We highlight the advantages of the new algorithm, such as its enhanced capability to deal with noise, and drawbacks such-as increased computational expense.
{"title":"Extending the synthetic aperture focusing algorithm to deal with flat and curved features in NDT","authors":"S. Cochran, J. Earnshaw, B. Bargain, K. Kirk","doi":"10.1109/ULTSYM.2002.1193526","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193526","url":null,"abstract":"The synthetic aperture focusing (SAF) technique allows exploration of ultrasonic array imaging performance with minimal hardware and it can provide excellent imaging results for point defects, such as fatigue crack tips, commonly found in non-destructive testing (NDT). However, it performs less well when imaging defects which are flat or curved with radii large relative to the ultrasonic wavelength. Here, we report an enhanced time-domain algorithm which can deal with flat and curved defects and which we have termed \"synthetic aperture correlation\". It is based on processing signals from multiple overlapping subsets of elements from an entire array. The algorithm has roots in SAF, matched filtering, beam steering and biomedical ultrasonic imaging. The data collection process is the same as for SAF and the new algorithm operates entirely in reception, off-line. It has been tested using a 96-element linear array operating at 6 MHz on aluminum test objects. We present simulated and experimental results and compare these with B-scans showing timer-of-flight diffraction (TOFD) characteristics and with conventional SAF. We highlight the advantages of the new algorithm, such as its enhanced capability to deal with noise, and drawbacks such-as increased computational expense.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128032805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193395
T. Shiba, Y. Fujita, S. Kondo, J. Hamasaki, Mayumi Ide, S. Ogawa, K. Oda
An equivalent circuit analysis including meander electrode resistance is applied to an acoustic coupler which has been proposed using cascaded quadrature wavelength group-type unidirectional structure. Linear circuit composition procedure for multi ports elements is applied in order to explain the meander resistive effect. Cascade-connected ports are prepared for the meander electrode. The experimental results was found to be in good agreement with the improved circuit calculation.
{"title":"Effect of electrode resistance for acoustic coupler using quadrature electrode","authors":"T. Shiba, Y. Fujita, S. Kondo, J. Hamasaki, Mayumi Ide, S. Ogawa, K. Oda","doi":"10.1109/ULTSYM.2002.1193395","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193395","url":null,"abstract":"An equivalent circuit analysis including meander electrode resistance is applied to an acoustic coupler which has been proposed using cascaded quadrature wavelength group-type unidirectional structure. Linear circuit composition procedure for multi ports elements is applied in order to explain the meander resistive effect. Cascade-connected ports are prepared for the meander electrode. The experimental results was found to be in good agreement with the improved circuit calculation.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127947003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193402
Chun-Yun Jian, S. Beaudin
This paper introduces a new type of SPUDT structure, which enables the design of SAW filters or delay-lines up into the 2 GHz range. The structure consists of two groups of spatially harmonic transducers e.g. Se=5 (+ + - + -) or Se=8 (+ + - + - - + -) and one group of reflectors positioned between the two groups of harmonic transducers. In the paper, the general operating principle of the new SPUDT is discussed. To confirm this new technique, a slanted type SAW filter using the new SPUDT structure with central frequency of 2.14 GHz was designed and fabricated. The directionality of this new SPUDT structure has been demonstrated by measurement.
{"title":"A new type SPUDT SAW for use in high frequency around 2 GHz","authors":"Chun-Yun Jian, S. Beaudin","doi":"10.1109/ULTSYM.2002.1193402","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193402","url":null,"abstract":"This paper introduces a new type of SPUDT structure, which enables the design of SAW filters or delay-lines up into the 2 GHz range. The structure consists of two groups of spatially harmonic transducers e.g. Se=5 (+ + - + -) or Se=8 (+ + - + - - + -) and one group of reflectors positioned between the two groups of harmonic transducers. In the paper, the general operating principle of the new SPUDT is discussed. To confirm this new technique, a slanted type SAW filter using the new SPUDT structure with central frequency of 2.14 GHz was designed and fabricated. The directionality of this new SPUDT structure has been demonstrated by measurement.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"549 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127958146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1192543
F. Jenson, F. Padilla, P. Laugier
The goal of this study is to propose a model for the ultrasonic frequency-dependent backscatter coefficient in cancellous bone. A weak scattering model is used. It allows us to address the inverse problem and to predict the mean trabecular thickness. The backscatter coefficient is expressed in terms of an autocorrelation function of the medium. Comparison is made with experimental data for 19 specimens and for frequency ranging from 0.4 to 1.2 MHz. For each specimen a non-linear regression is performed and the mean trabecular thickness is estimated. Experimental data and theoretical predictions are averaged over the 19 specimens. A good agreement between experimental data and predictions was found for both the magnitude and the frequency-dependence of the backscatter coefficient. We also found a good agreement between the experimental mean trabecular thickness (Tb.Th=130/spl plusmn/6.5 /spl mu/m) derived from the analysis of bone 3-D micro-architecture using high resolution micro-tomography and theoretical predictions (d/sub Gauss/ = 140/spl plusmn/10 /spl mu/m, d/sub exponential/=153/spl plusmn/12.5 /spl mu/m). These results open interesting prospects for the estimation of the mean trabecular thickness from in vivo measurements.
{"title":"Prediction of frequency-dependent ultrasonic backscatter in cancellous bone using statistical weak scattering model","authors":"F. Jenson, F. Padilla, P. Laugier","doi":"10.1109/ULTSYM.2002.1192543","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192543","url":null,"abstract":"The goal of this study is to propose a model for the ultrasonic frequency-dependent backscatter coefficient in cancellous bone. A weak scattering model is used. It allows us to address the inverse problem and to predict the mean trabecular thickness. The backscatter coefficient is expressed in terms of an autocorrelation function of the medium. Comparison is made with experimental data for 19 specimens and for frequency ranging from 0.4 to 1.2 MHz. For each specimen a non-linear regression is performed and the mean trabecular thickness is estimated. Experimental data and theoretical predictions are averaged over the 19 specimens. A good agreement between experimental data and predictions was found for both the magnitude and the frequency-dependence of the backscatter coefficient. We also found a good agreement between the experimental mean trabecular thickness (Tb.Th=130/spl plusmn/6.5 /spl mu/m) derived from the analysis of bone 3-D micro-architecture using high resolution micro-tomography and theoretical predictions (d/sub Gauss/ = 140/spl plusmn/10 /spl mu/m, d/sub exponential/=153/spl plusmn/12.5 /spl mu/m). These results open interesting prospects for the estimation of the mean trabecular thickness from in vivo measurements.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115769286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1192558
A. Acquafresca, E. Biagi, S. Cerbai, L. Masotti
Recent progresses in opto-acoustics let us foresee the possibility to realize a strongly miniaturized transducer, characterized by high cutoff frequency, wide bandwidth, high electromagnetic compatibility and no electrical wiring. This transducer is constituted by two optical fibers: a first fiber, with a heavily absorbing film on its extremity generates broad-band ultrasounds. Another fiber, with a Fabry-Perot cavity mounted on its tip, detects ultrasonic echoes through optic interferometry. Such a transducer may result greatly useful for diagnostic applications, allowing for higher echographic resolution and microstructural tissue characterization. In addition, the strong miniaturization would allow its insertion into human body for direct investigation of focal lesions with minimal invasivity. Thus, a path toward "virtual biopsy" may be traced.
{"title":"Towards virtual biopsy through an all fiber optic ultrasonic miniaturized transducer: a proposal","authors":"A. Acquafresca, E. Biagi, S. Cerbai, L. Masotti","doi":"10.1109/ULTSYM.2002.1192558","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192558","url":null,"abstract":"Recent progresses in opto-acoustics let us foresee the possibility to realize a strongly miniaturized transducer, characterized by high cutoff frequency, wide bandwidth, high electromagnetic compatibility and no electrical wiring. This transducer is constituted by two optical fibers: a first fiber, with a heavily absorbing film on its extremity generates broad-band ultrasounds. Another fiber, with a Fabry-Perot cavity mounted on its tip, detects ultrasonic echoes through optic interferometry. Such a transducer may result greatly useful for diagnostic applications, allowing for higher echographic resolution and microstructural tissue characterization. In addition, the strong miniaturization would allow its insertion into human body for direct investigation of focal lesions with minimal invasivity. Thus, a path toward \"virtual biopsy\" may be traced.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132225200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1192642
F. J. de Ana, M. O’Donnell
Vibration of piezoelectric elements after electrical excitation creates ringdown artifacts in ultrasound images close to the transducer surface. For intraluminal applications, high quality images are often needed at depths close to the catheter surface. Consequently, ringdown artifacts pose a serious problem for intraluminal circumferential arrays. A current method to reduce these artificial echoes subtracts a precalibrated ringdown signal from each frame in a data set. The dynamic nature of the ringdown artifact, however, reduces the effectiveness of this subtraction algorithm with time following data collection. The ringdown signal has very distinctive characteristics, especially in the near field azimuthal spectrum. An in-depth study of those characteristics presents new alternatives to minimize ringdown artifacts. Using a set of depth-dependent azimuthal filters, we present a method to significantly reduce ringdown artifacts while minimally affecting the real signal. Rubber phantoms with embedded graphite particles were imaged close to the transducer surface to study potential improvements obtained with the azimuthal filters. Results show a reduction of the ringdown signal by at least 10 dB, while increasing the dynamic range between the real signal and the ringdown from 2 dB to 15 dB. The combination of azimuthal filtering with ringdown subtraction can greatly enhance contrast at ranges close to the transducer surface.
{"title":"Ringdown reduction for an intraluminal ultrasound array using depth-dependent azimuthal filters","authors":"F. J. de Ana, M. O’Donnell","doi":"10.1109/ULTSYM.2002.1192642","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1192642","url":null,"abstract":"Vibration of piezoelectric elements after electrical excitation creates ringdown artifacts in ultrasound images close to the transducer surface. For intraluminal applications, high quality images are often needed at depths close to the catheter surface. Consequently, ringdown artifacts pose a serious problem for intraluminal circumferential arrays. A current method to reduce these artificial echoes subtracts a precalibrated ringdown signal from each frame in a data set. The dynamic nature of the ringdown artifact, however, reduces the effectiveness of this subtraction algorithm with time following data collection. The ringdown signal has very distinctive characteristics, especially in the near field azimuthal spectrum. An in-depth study of those characteristics presents new alternatives to minimize ringdown artifacts. Using a set of depth-dependent azimuthal filters, we present a method to significantly reduce ringdown artifacts while minimally affecting the real signal. Rubber phantoms with embedded graphite particles were imaged close to the transducer surface to study potential improvements obtained with the azimuthal filters. Results show a reduction of the ringdown signal by at least 10 dB, while increasing the dynamic range between the real signal and the ringdown from 2 dB to 15 dB. The combination of azimuthal filtering with ringdown subtraction can greatly enhance contrast at ranges close to the transducer surface.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129981483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193425
M. Pereira da Cunha, D. Malocha, D. Puccio, J. Thiele, T. Pollard
This paper reports predicted and measured properties of the pure shear horizontal (SH) mode for the LGX family of crystals, which includes langasite (LGS), langanite (LGN), and langatate (LGT). Our results show high electromechanical coupling and zero temperature coefficient of delay (TCD) along LGX Euler angles (0/spl deg/, /spl theta/, 90/spl deg/), /spl theta/ between 10/spl deg/ and 25/spl deg/, with penetration depths which are comparable to SAW devices. In particular along LGT (0/spl deg/, 13.5/spl deg/, 90/spl deg/), experimental results are disclosed with resonators and delay line structures which verify the high electromechanical coupling (0.8%), about 10 times stronger than the 36/spl deg/ Y rotated quartz SH orientation, and zero TCD around 140 *C. The penetration depth of 7 wavelengths is about eight times shallower than 36/spl deg/ Y quartz. The phase velocity of 2660 m/s is within 0.2% of the calculated value, which is about 55% below the phase velocity of 36/spl deg/ Y quartz, thus leading to smaller Surface Transverse Wave (STW) devices. With such positive predicted and measured coupling and propagation characteristics, these orientations suggest the fabrication of high coupling, zero TCD, and smaller STW devices for liquid sensor, filtering, and frequency control applications.
{"title":"High coupling, zero TCD SH wave on LGX","authors":"M. Pereira da Cunha, D. Malocha, D. Puccio, J. Thiele, T. Pollard","doi":"10.1109/ULTSYM.2002.1193425","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193425","url":null,"abstract":"This paper reports predicted and measured properties of the pure shear horizontal (SH) mode for the LGX family of crystals, which includes langasite (LGS), langanite (LGN), and langatate (LGT). Our results show high electromechanical coupling and zero temperature coefficient of delay (TCD) along LGX Euler angles (0/spl deg/, /spl theta/, 90/spl deg/), /spl theta/ between 10/spl deg/ and 25/spl deg/, with penetration depths which are comparable to SAW devices. In particular along LGT (0/spl deg/, 13.5/spl deg/, 90/spl deg/), experimental results are disclosed with resonators and delay line structures which verify the high electromechanical coupling (0.8%), about 10 times stronger than the 36/spl deg/ Y rotated quartz SH orientation, and zero TCD around 140 *C. The penetration depth of 7 wavelengths is about eight times shallower than 36/spl deg/ Y quartz. The phase velocity of 2660 m/s is within 0.2% of the calculated value, which is about 55% below the phase velocity of 36/spl deg/ Y quartz, thus leading to smaller Surface Transverse Wave (STW) devices. With such positive predicted and measured coupling and propagation characteristics, these orientations suggest the fabrication of high coupling, zero TCD, and smaller STW devices for liquid sensor, filtering, and frequency control applications.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134505087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-10-08DOI: 10.1109/ULTSYM.2002.1193524
N. Nishiwaki, S. Hori, N. Otsuki, S. Zhou
In this paper, a state of vibration-welded joints of thermoplastics has been nondestructively measured using an ultrasonic technique during the vibration welding process. As the results, not only the state but also the tensile strength of the vibration-welded joints can be evaluated during the welding process.
{"title":"Measurement of behavior at welding resin parts using ultrasonic technique","authors":"N. Nishiwaki, S. Hori, N. Otsuki, S. Zhou","doi":"10.1109/ULTSYM.2002.1193524","DOIUrl":"https://doi.org/10.1109/ULTSYM.2002.1193524","url":null,"abstract":"In this paper, a state of vibration-welded joints of thermoplastics has been nondestructively measured using an ultrasonic technique during the vibration welding process. As the results, not only the state but also the tensile strength of the vibration-welded joints can be evaluated during the welding process.","PeriodicalId":378705,"journal":{"name":"2002 IEEE Ultrasonics Symposium, 2002. Proceedings.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131797404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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