碩士 / 國立成功大學 / 電機工程學系碩博士班 / 91 / This thesis presents a measuring and data transmission system for longshore current survey, which is mainly composed of the positioning sub-system, the data processing sub-system and the radio transmission sub-system. In the positioning sub-system, Global Positioning System (GPS) receiver is employed to locate ball position. A single-chip 8051 is used for data processing sub-system. Applying the software UART, we receive data from the GPS receiver and transmit GPS data to PC. Regarding the communication protocol, the hardware UART method is used to communicate between two balls and base station. In this thesis, the two balls are set to taking turns to transmit data per second. The radio transmission sub-system is a channel of the data transmits. The frequency band of radio transceiver is 433.92MHz, which is modulated by Frequency Shift Keying (FSK) method. The radio transceiver total output power is over 800mW. The sensitivity is over —80dBm. Finally, a PC-based information monitoring and storing sub-system is designed to collect the experimental data. The experimental results verify that the purpose of positioning and transmission is achieved.
| Identifer | oai:union.ndltd.org:TW/091NCKU5442094 |
| Date | January 2003 |
| Creators | Pei-Jung Lee, 李培榮 |
| Contributors | Jia-You Lee, 李嘉猷 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 86 |
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