Vehicle Navigation and Information Systems Conference, 1991最新文献_第7页

Taxi emergency and location system for metropolitan Toronto 多伦多市区出租车紧急情况和定位系统

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912744

L. Gomes, G. Heti

引用次数: 5

The generation of synthetic O-D demands from real-time vehicle probe data: Potential and limitations 从实时车辆探测数据生成合成O-D需求:潜力和局限性

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912836

M. Van Aerde, G. MacKinnon, B. Hellinga

引用次数: 12

Evaluation of location system combining a GPS receiver with inertial sensor GPS接收机与惯性传感器组合定位系统的评价

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912809

H. Tsuji, H. Maeda, A. Shibata, F. Morisue

引用次数: 2

Using variable reluctance sensors for differential odometer applications 使用可变磁阻传感器差分里程计的应用

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912788

M. Pikula, G. Calves

{"title":"Using variable reluctance sensors for differential odometer applications","authors":"M. Pikula, G. Calves","doi":"10.4271/912788","DOIUrl":"https://doi.org/10.4271/912788","url":null,"abstract":"Applying a variable reluctance sensor to a differential odometer application requires special considerations. Due to widespread use in anti-lock brake systems and the need for cost effective designs, variable reluctance sensors have advantages over more expensive active sensors. Unfortunately, both mechanical and electrical parameters can adversely affect the output of a variable reluctance sensor. The output signal varies with the rate of change of the flux, mechanical spacing and magnetic source variation. At low vehicle speeds the output signal, which is a function of the rate of change of the flux, tends to approach zero and signal-to-noise ratios become significant. Since changes in vehicle direction typically occur at lower speeds, differential odometers require good low speed performance. In addition to speed, differential odometers rely on two sensors, therefore sensor variation must also be compensated for. Consequently, using variable reluctance sensors to perform differential odometer calculations requires signal processing, special circuitry and pulse train processing to extract an acceptable level of information. This paper introduces a signal conditioning circuit that operates over a wide frequency and amplitude range. The output of the circuit can be connected to the input of a microprocessor. Passive components can be adjusted to work with different applications.","PeriodicalId":126255,"journal":{"name":"Vehicle Navigation and Information Systems Conference, 1991","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123351982","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: 5

The University of Michigan IVHS education program 密歇根大学IVHS教育项目

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912802

K. Chen, B. Galler, T. Reed

{"title":"The University of Michigan IVHS education program","authors":"K. Chen, B. Galler, T. Reed","doi":"10.4271/912802","DOIUrl":"https://doi.org/10.4271/912802","url":null,"abstract":"Rapidly increasing demand for transportation combined with limited ability for expansion of facilities has led to recent degradations in the quality of transportation systems. Intelligent Vehicle-Highway Systems (IVHS) represent a promising effort toward enabling more effective and efficient use of current capacity thus in essence expanding the roadway. As the concepts and technologies utilized by IVHS are new to much of the transportation community there is a need for an educational initiative in this area. In 1990 the University of Michigan (UM) responded to this need by creating the first, and to date the only, university program in IVHS education. The IVHS Education Program is receiving initial multi-year support from the U.S. Department of Transportation with matching support from the University of Michigan. Significant assistance is also being provided by sponsors from industry, the Michigan Department of Transportation, Michigan State University (MSU), and Wayne State University (WSU). The Program is structured as a cross-disciplinary cooperative effort to provide both traditional university and continuing education. Key new initiatives include; 1) a Certificate in Transportation Studies: IVHS which has been designed to complement the depth gained through a master's or Ph.D degree in an established discipline by providing breadth in practical knowledge relevant to IVHS, 2) an Engineering Summer Conference which is offered to expose practicing engineers and professionals to the latest developments in IVHS, and 3) an Executive Education Seminar which is held for corporate and government executives and planners interested in strategic issues in IVHS. The unconventional nature of the IVHS Education Program gave rise to a number of unique difficulties during development and implementation in a traditional university setting. It is hoped that the UM experience in overcoming these hindrances will prove beneficial to any institution seeking to provide similar education.","PeriodicalId":126255,"journal":{"name":"Vehicle Navigation and Information Systems Conference, 1991","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122960115","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

Datatrak automatic vehicle location system in operational use in the UK Datatrak自动车辆定位系统在英国投入使用

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912825

K. M. Banks

引用次数: 6

Modelling distributed real-time route guidance strategies in a traffic network that exhibits the Braess paradox 基于bress悖论的交通网络分布式实时路径引导策略建模

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912799

L. Rilett, M. Van Aerde

引用次数: 28

Traffic analysis including non-conforming behaviour via image processing 流量分析，包括通过图像处理的不符合行为

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912753

Lshwar K Sethi, Wayne L Brillhart

{"title":"Traffic analysis including non-conforming behaviour via image processing","authors":"Lshwar K Sethi, Wayne L Brillhart","doi":"10.4271/912753","DOIUrl":"https://doi.org/10.4271/912753","url":null,"abstract":"In this paper an approach to traffic analysis is presented which employs image processing techniques to detect non-conforming behavior of vehicles on roadways in addition to providing the normal traffic statistics required for traffic monitoring. Traffic scenes recorded on video tape were used in the laboratory to test the approach. Binary images were obtained by subtracting each incoming sampled frame from a reference frame and thresholding the result. Centroids were calculated for each of the objects found in the binary images and were used to track the path of each vehicle on successive frames for its duration along the roadway in the region of interest. To minimize the computation time required to match objects from a given frame to the corresponding objects in the next frame, the velocity of each vehicle and inertial constraints on speed and angular deviation were used to predict each object's location in the next frame. The object nearest the target value was chosen as the appropriate match. The trajectory of each vehicle was checked for conformity. The implementation of the approach has been able to identify non-conforming vehicle behavior and issue a message on the monitor describing the detected behavior.","PeriodicalId":126255,"journal":{"name":"Vehicle Navigation and Information Systems Conference, 1991","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127569147","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

Highway automation: System modeling for impacts analysis 公路自动化:影响分析的系统建模

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912772

A. Bresnock, M. Miller, E. Lechner, S. Shladover

引用次数: 6

User performance on typing tasks involving reduced-size, touch screen keyboards 用户在使用缩小尺寸的触摸屏键盘打字时的表现

Vehicle Navigation and Information Systems Conference, 1991 Pub Date : 1991-10-01 DOI: 10.4271/912796

M. F. Coleman, B. Loring, M. Wiklund

引用次数: 13