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http://dx.doi.org/10.3745/KIPSTD.2009.16-D.1.133

A CDMA Network-based Wireless System for Measuring Lap Time on a Ski Slope  

Lee, Hyung-Bong (강릉대학교 컴퓨터공학과)
Park, Lae-Jeong (강릉대학교 전자공학과)
Moon, Jung-Ho (강릉대학교 전자공학과)
Chung, Tae-Yun (강릉대학교 전자공학과)
Publication Information
The KIPS Transactions:PartD / v.16D, no.1, 2009 , pp. 133-138 More about this Journal
Abstract
This paper introduces a pilot CDMA network-based wireless lap time measurement system set up on a ski slope of Yongpyong Ski Resort. The wireless lap time measurement system is one output of U-Sports Project of Gangwon Province, which is intendended for promoting local strategic business and preparation for hosting 2018 Winter Olympic Games at Pyeongchang. A pair of laser sensors is installed at the entry and exit points of a section requiring lap time measurement on a ski slope. Each laser sensor is connected to a sensor node via wire so that the sensor node can detect the time when a skier enters or exits the section. Also each sensor node is connected to a CDMA network via a modem and receives a standard time from a NTP server. Each node executes the NTP algorithm to synchronize its local time to the received server time. As a result of the time synchronization, the sensor nodes maintain its local time within a resolution of at least 10 miliseconds and transmit the time of detection to a central control center. While the wireless lap time measurement system introduced in the paper does not need expensive measurement equipment, the system allows the central control center to provide lap time records in a more convenient manner compared to conventional manual lap time measuremnt methods.
Keywords
Gangwon-do PyeongChang; U-Sports; Ski Slope; Wireless Lap Time Measurement; CDMA;
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