Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)最新文献_第8页

The study of colloidal systems with TSM piezoelectric sensors 基于TSM压电传感器的胶体体系研究

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956391

R. M. Lec, J. Sorial

{"title":"The study of colloidal systems with TSM piezoelectric sensors","authors":"R. M. Lec, J. Sorial","doi":"10.1109/FREQ.2001.956391","DOIUrl":"https://doi.org/10.1109/FREQ.2001.956391","url":null,"abstract":"Colloids and suspensions represent a large group of fluids important in many biological and chemical applications. Mechanical and viscoelastic properties of colloids and suspensions, processes of sedimentation, mechanisms of interaction between particles, and interfacial processes involving interaction of particles with various surfaces are of special interest. In this paper we present the use of Thickness Shear Mode (TSM) resonant sensors for characterizing the kinetics of various phenomena accompanying the sedimentation process. The studied colloidal system which consisted of a polystyrene spheres of the size 1, 10 and 90 microns suspended buffered saline solution was tested with TSM resonators operating at the fundamental frequency of 5 MHz and its harmonics. The measured parameters included the sedimentation rate, and the changes in the viscoelastic properties of the medium as a function of time, concentration and the penetration depth of the probing acoustic shear wave. The obtained results showed that the TSM sensors can be used for a rapid and accurate monitoring colloidal processes in real time with high sensitivity and resolution.","PeriodicalId":369101,"journal":{"name":"Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124014359","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}

引用次数: 4

An influence of nonlinearities on PM and AM noises in BJT amplifiers BJT放大器中非线性对PM和AM噪声的影响

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956183

V. N. Kuleshov

引用次数: 2

Temperature compensation and low g-vibration sensitivity STW microwave source 温度补偿和低g-振动灵敏度STW微波源

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956358

Wei Zhou

引用次数: 1

Temperature coefficient and ageing of BAW composite materials BAW复合材料的温度系数与老化

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956347

K. Lakin, K. McCarron, J. McDonald, J. Belsick

引用次数: 18

Development of surface acoustic wave liquid sensing system and application for japanese tea measurements 表面声波液体传感系统的研制及其在日本茶叶测量中的应用

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956285

J. Kondoh, T. Muramatsu, T. Nakanishi, S. Shiokawa

引用次数: 9

Rubidium and cesium in one fountain: a new tool for the search of the time variation of the fine structure constant 一个喷泉中的铷和铯:寻找精细结构常数时间变化的新工具

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956154

Y. Sortais, S. Bize, C. Nicolas, C. Mandache, G. Santarelli, A. Clairon, C. Salomon

引用次数: 1

A direct digital synthesis system for surface acoustic wave sensors 表面声波传感器的直接数字合成系统

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956271

K. Mitzner, E. Berkenpas, J. Sternhagen, M. Karlgaard, C. Wold, D. Galipeau

{"title":"A direct digital synthesis system for surface acoustic wave sensors","authors":"K. Mitzner, E. Berkenpas, J. Sternhagen, M. Karlgaard, C. Wold, D. Galipeau","doi":"10.1109/FREQ.2001.956271","DOIUrl":"https://doi.org/10.1109/FREQ.2001.956271","url":null,"abstract":"Current designs for surface acoustic wave sensor system electronics are typically based on SAW oscillators, phase detectors, or phase-locked loops to measure changes in SAW velocity. The advantage of SAW oscillators is a high resolution frequency output as compared to phase systems which are more stable and can more easily provide amplitude information. Phase-locked loops offer advantages of both the SAW oscillator and phase detection systems but have the disadvantages of a fixed frequency range and the need for frequency counting circuitry. The objectives of this work were to study the performance of a direct digital synthesis based phase-locked loop system with the advantages of a programmable center frequency, elimination of the need for frequency counting circuitry, and tolerance to large SAW sensor insertion loss. The DDS system had a resolution of 4 Hz and a range of 80 to 120 MHz with 100 MHz SAW sensors in humidity and temperature sensing applications. This indicates that the DDS based PLL is a practical electronic system for SAW sensors.","PeriodicalId":369101,"journal":{"name":"Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128259573","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}

引用次数: 2

Model of a quartz crystal tuning fork using torsion spring at the joint of the arm and the base 模型的石英晶体音叉使用扭转弹簧在手臂和基地的关节

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956345

Hideaki Itoh, Yoshiaki Aoshima, Tamotsu Egawa

引用次数: 4

Gas sensor using high-frequency quartz crystal microbalance 气体传感器采用高频石英晶体微天平

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956274

S. Kurosawa, Dae-Sang Han, Jong-Won Park, H. Aizawa, Minoru Yoshimoto, Chikashi Nakamura, Jun Miyake, Sang‐Mok Chang

引用次数: 11

The effects of ionizing radiation on the vacuum-electrolysis of quartz 电离辐射对石英真空电解的影响

Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218) Pub Date : 2001-06-06 DOI: 10.1109/FREQ.2001.956207

J. C. King, J.J. Martin

{"title":"The effects of ionizing radiation on the vacuum-electrolysis of quartz","authors":"J. C. King, J.J. Martin","doi":"10.1109/FREQ.2001.956207","DOIUrl":"https://doi.org/10.1109/FREQ.2001.956207","url":null,"abstract":"Electrolysis (electrodiffusion, sweeping) in vacuum has been shown to reduce the sensitivity of quartz resonators to pulsed radiation. Vacuum-sweeping is expected to remove the alkalis associated with the aluminum and the hydrogen associated with the growth-defects and replace them with electronic holes. The process is not very well understood and is often incomplete. It has been suggested that sweeping in the presence of ionizing radiation would speed the release of the trapped ions and hydrogen from the defect sites by enhancing the availability of electronic charge carriers over those generated at the electrodes. Quartz subjected to this process should not show any OH-related infrared absorption. Several blocks of Sawyer Special Premium Q quartz were vacuum-swept while being irradiated. Bremstrahlung (continuous) x-rays produced by colliding 1.5 MeV electrons with a Mo target were used for the irradiation. Low-temperature FTIR profiles showed a complete removal of all of the OH-related absorption bands from two of the three blocks that had been vacuum-swept in the radiation-field. Control blocks were vacuum-swept without the radiation-field. FTIR profiles made on these control blocks showed that the sweeping front had moved only a fraction of the way through the blocks. Low-temperature FTIR measurements showed that the block that was only partially swept in the radiation field was less pure than the other blocks. It was also inhomogenous. The removal of hydrogen by vacuum-sweeping in a radiation-field appears to be permanent; annealing a sample in air at 500/spl deg/C did not reintroduce any OH-related absorption bands.","PeriodicalId":369101,"journal":{"name":"Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115420493","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}

引用次数: 1