Documents
Wire-Based Detection of Corrosive Salts in Concrete
This paper presents an iron wire trigger mechanism that will be used for a new generation of low-cost corrosion sensors that are wireless and do not require batteries or any other external power sources. The corrosion rates for thin sensor wires, 0.065 to 0.25 mm in diameter, were investigated in sodium chloride solutions and compared with the mass loss from steel coupons under similar conditions. The 0.125 and 0.065 mm wires were embedded in concrete and subjected to accelerated corrosion testing. These wires behaved similarly to mild reinforcing steel used in concrete structures and trigger at predictable chloride levels and are suitable for uses as trigger for corrosion. Prototype sensors, constructed using commercial radio-frequency identification tags with a section of the antenna replaced by a wire trigger, embedded in concrete and stopped responding at reproducible chloride concentrations. These results demonstrate the methodology to create successful radio-frequency identification based corrosion sensors.
Authors: Nicholas Materer, Paul Field, Nicholas Ley, Ahmad Razzaghi, Dane Scott, Tyler Ley, Allen Apblett
Presented at the 18th World Congress on ITS, October 2011, Orlando, Florida
Windows CE for Automotive: A Primer
The automotive market is ripe for in-car computing systems that deliver better safety, entertainment and information. Microsoft has spent the last five years working closely with automakers, automotive electronics manufacturers and consumers to develop its Windows CE for Automotive operating system, based upon our vision to empower the automotive industry with great software to provide information, entertainment, communication, and services in vehicles.
We have recently shipped, the third version of Windows CE for Automotive, firmly establishing our ability to deliver timely and innovative client platforms for the embedded automotive market. This latest release showcases Microsoft’s ability to lead with an operating system that is flexible, reliable, and able to integrate information, entertainment and wireless access to the outside world.
2000 Microsoft Corporation
Presented at the 11th ITS Annual Conference and Exposition, June 4-7, 2001 Miami Beach, Florida
Wide Area Detection for Reducing Dilemma Zone Incursions at Isolated High Speed Intersections
Two classes of detectors are compared for suitability of use for dilemma zone protection in this
chapter: the wide area detector (WAD) and the point detector. WADs provide the ability to
simultaneously monitor the passage of each vehicle within a wide area and selectively influence
signal phase timings based upon operational objectives related to measurements such as position, speed, and count. Point detectors are usually loop detectors that influence signal phase timings based upon the presence of a vehicle at a fixed location. Point detectors are ubiquitously deployed for volume density operations, detection of congested traffic, and dilemma zone protection. In this paper both detector types are examined in relation to dilemma zone protection. The results of this paper show a significant potential improvement in safety and efficiency of operation of isolated intersection by using an reliable WAD as dilemma zone detector. The second part of the paper investigates the performance of a radar based wide area detection technology and in third part investigates the potential improvements that can be made to the existing technology by using additional information from camera sensors.
Authors: Anuj Sharma, Mauricio Casares, Senem Velipasalar, Darcy Bullock, Srinivas Peeta
Presented at the 18th World Congress on ITS, October 2011, Orlando, Florida
What’s Wrong with a Wireless Spread Spectrum Network for Traffic Management Systems
While the main buzz in ITS communications networks is for “more bandwidth” using
fiber optics, one City in California chose to upgrade their system based entirely on a
wireless network (spread spectrum) with Model 2070 controllers. While this wireless
technology has been around for some time now, designing such a system requires a lot of
initial background effort during the design, and flexibility on the part of the owning
agency. Issues such as repeater sites, copper-to-wireless interfaces, site and path
analysis, antenna separation distances and lengths of antenna cabling all need to be
considered during the design. This paper discusses the overview of that system and
describes the main challenges in designing and implementing a spread spectrum system
including some “best practices”.
DKS Associates
City of Camarillo
Presented at the ITS America Annual Conference and Exposition, April 26 - 28, 2004 San Antonio, Texas
What's the Worst that can Happen? How to Stop Worrying and Love Social Media
Much has been written about how mass transit operators can use social media to benefit their agencies. This paper highlights some of these advantages but mostly focuses on some of the issues that keep organizations from getting started with social media. These may include concerns about technical requirements, the digital divide and access for people with disabilities, staff management, controlling the conversation, cyber-security, and record-keeping requirements. These concerns are examined and strategies for addressing them are presented, based largely on the experience of other transportation organizations in the U.S. and Canada.
Oak Square Resources, LLC
Presented at the 18th World Congress on ITS, October 2011, Orlando, Florida
Presented at the 18th World Congress on ITS, October 2011, Orlando, Florida