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


The KIPS Transactions:PartD, Vol. 16, No. 1, pp. 133-138, Feb. 2009
10.3745/KIPSTD.2009.16.1.133,   PDF Download:

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.


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Cite this article
[IEEE Style]
H. B. Lee, L. J. Park, J. H. Moon, T. Y. Chung, "A CDMA Network-based Wireless System for Measuring Lap Time on a Ski Slope," The KIPS Transactions:PartD, vol. 16, no. 1, pp. 133-138, 2009. DOI: 10.3745/KIPSTD.2009.16.1.133.

[ACM Style]
Hyung Bong Lee, Lae Jeong Park, Jung Ho Moon, and Tae Yun Chung. 2009. A CDMA Network-based Wireless System for Measuring Lap Time on a Ski Slope. The KIPS Transactions:PartD, 16, 1, (2009), 133-138. DOI: 10.3745/KIPSTD.2009.16.1.133.