2008 IEEE International Frequency Control Symposium最新文献_第5页

Development of high precision and multifunctional timing system using integrated GPS/BD receiver 高精度多功能GPS/BD接收机授时系统的研制

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623051

Li Gun, Wu Fu-ping, Wei Jing-fa, Huang Xian-he

{"title":"Development of high precision and multifunctional timing system using integrated GPS/BD receiver","authors":"Li Gun, Wu Fu-ping, Wei Jing-fa, Huang Xian-he","doi":"10.1109/FREQ.2008.4623051","DOIUrl":"https://doi.org/10.1109/FREQ.2008.4623051","url":null,"abstract":"A highly precise and multifunctional timing system using the self development integrated GPS/BD time receiver is presented in this paper. The authors firstly designed an integrated GPS/BD (compass or Beidou navigation system of China) time receiver for time and frequency synchronization in a local network, and describing the main issues and the solution of the receiver implement in detail, and then focused on performance considerations. The receiver has been used as the major part to implement the timing system. The timing system can offer precise time code and frequency signal including standard frequency signal 5 MHz and 10 MHz, 1 pps and the serial time code data et al. The common view comparison technique is used in each sub-system for eliminating the common error of sources, and the observation data can be transferred between each station by wireless or internet. To keep the time synchronous precision within 10 ns between the master station and any slave station according to the observation results, phase shifting control and frequency division have been used which exploit their full level of performance. With the timing system, time comparisons are performed with a precision of 7.4 ns for a short baselines and 6.6 ns for a super short baseline. The result of traveling clock experiment indicates that the synchronous precision was 2.7 ns. The frequency stability of one second, 1.3 E-12 was achieved. The timing system can be used to supply high time and frequency signal for radar tracking, communication system, power grid and intelligent transportation system etc.","PeriodicalId":220442,"journal":{"name":"2008 IEEE International Frequency Control Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123790281","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: 3

Finite Element Analysis of thickness shear crystals with surface irregularities 表面不规则厚度剪切晶体的有限元分析

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4622949

D. Puccio, E. P. Eernisse

{"title":"Finite Element Analysis of thickness shear crystals with surface irregularities","authors":"D. Puccio, E. P. Eernisse","doi":"10.1109/FREQ.2008.4622949","DOIUrl":"https://doi.org/10.1109/FREQ.2008.4622949","url":null,"abstract":"This work is a continuation of an earlier study on drive level dependence (DLD), wherein the resistance of a thickness-shear crystal changes at low drive levels as the drive level changes. The earlier work used a 2-D Finite Element Analysis (FEA) to show that a surface irregularity, such as an attached particle, causes rotational imbalance in the motion of a contoured thickness-shear crystal, which transfers motional energy from the trapped shear motion to flexural motion. The flexural motion transports motional energy to the mounts. Degradation in the Q due to this increased edge motion was inferred. This degradation in Q was strongly dependent on the location of the surface irregularity in the 2-D FEA model. The present work extends the analysis to 3-D FEA using an SC resonator along with a four-point clip mount with polyimide bonding agent. Damped eigenfrequency analysis is used to include loss in the mounting structure and directly calculate eigenmode Q as a function of the location of an attached particle on the resonator surface. The results are very informative. A 4.0E-11 kg mass can change the Q by up to 30%. The magnitude of the effect is strongly dependent on the lateral location of the mass on the surface. For example, the magnitude of the effect can change significantly between two points on the blank surface only 20 microns apart.","PeriodicalId":220442,"journal":{"name":"2008 IEEE International Frequency Control Symposium","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114280878","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

Passive wireless SAW sensors for IVHM 用于IVHM的无源无线SAW传感器

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623003

W. Wilson, D. Perey, G. Atkinson, R. Barclay

引用次数: 20

Novel diode pumped Yb:KYF4 and Yb:YLF4 lasers for optical frequency metrology at 1 μm / 0.5 μm 新型二极管泵浦Yb:KYF4和Yb:YLF4激光器用于1 μm / 0.5 μm光频测量

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4622965

N. Coluccelli, G. Galzerano, P. Laporta, L. Bonelli, A. Toncelli, A. Di Lieto, M. Tonelli, V. Calabrese, M. Norgia, A. Pesatori, C. Svelto

引用次数: 0

2GHz STW resonators of low insertion loss, low Q 低插入损耗，低Q的2GHz STW谐振器

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4622985

W. Zhou, Xiaoli Liu

引用次数: 0

Integration of electrostrictive Ba0.7Sr0.3TiO3 thin films into Bulk Acoustic Wave resonator for RF-frequency tuning under DC bias 电致伸缩Ba0.7Sr0.3TiO3薄膜集成到体声波谐振器中用于直流偏压下射频调谐

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623000

Brice Ivira, Alexandre Reinhardt, Emmanuel Defay, M. Aid

引用次数: 9

Resonator using Guided waves in a piezoelectric layer above a Bragg mirror 在布拉格反射镜上方的压电层中使用导波的谐振器

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623066

I. Kone, Bertrand Dubus, Lionel Buchaillot, Alexandre Reinhardt, Fabrice Casset, Marc Aid, J. F. Carpentier, Pascal Ancey

引用次数: 3

A time and frequency measurement method based on delay-chain technique 一种基于延迟链技术的时频测量方法

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623046

Hai Wang, Wei Zhou, Zhiqi Li, Shixiang Qian, Weining Jiang, Chunxu Wang

{"title":"A time and frequency measurement method based on delay-chain technique","authors":"Hai Wang, Wei Zhou, Zhiqi Li, Shixiang Qian, Weining Jiang, Chunxu Wang","doi":"10.1109/FREQ.2008.4623046","DOIUrl":"https://doi.org/10.1109/FREQ.2008.4623046","url":null,"abstract":"The short time-interval and frequency measurement are main research projects in the measurement of time and frequency. Traditional measurement methods include direct counting, analog interpolating, time-to-voltage conversion, time vernier and time-to-digital conversion. However these methods are all complicated and the instruments based on these methods are expensive. A novel method for short time-interval and frequency measurement based on delay-chain technique is presented in this paper. This method utilizes measured short time-interval or measured frequency signal to generate count gate. A delay-chain is used to delay reference frequency signal orderly. So a group of signals with phase-shifting evenly in a period of reference frequency signal are generated, and are counted respectively under the same count gate. With the average of the counts as the count of reference frequency, the decimal counting error is reduced and measurement accuracy is improved. The measurement resolution of this method for short time-interval and measurement accuracy for frequency are equal to the measurement results under condition of increasing frequency of reference frequency signal by the times of the number of delay unit in a delay-chain. An experiment demonstrates the resolution of short time-interval measurement and the accuracy of frequency measurement could be 100 ps and respectively and the theoretical measurement resolution and accuracy could be higher. Although it needs more delay units and counters in order to achieve high-accuracy measurement, this is not a problem because new device has been used, such as FPGA. This method is suitable for high-accuracy and low-cost measurement..","PeriodicalId":220442,"journal":{"name":"2008 IEEE International Frequency Control Symposium","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125868788","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: 11

Frequency sources and filters applications using high overtone bulk acoustic resonators exhibiting high Q.f product 频率源和滤波器应用使用高泛音体声谐振器显示高Q.f产品

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623106

D. Gachon, J. Masson, E. Courjon, Y. Gruson, S. Ballandras

引用次数: 2

Algorithm of MTIE point estimate computing for non-uniform sampling of time error 非均匀采样时间误差的MTIE点估计计算算法

2008 IEEE International Frequency Control Symposium Pub Date : 2008-05-19 DOI: 10.1109/FREQ.2008.4623088

A. Dobrogowski, M. Kasznia

引用次数: 0