Ms. Zhang Wen Profile

Zhang Wen

at National Time Service Ctr

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Proceedings Article | 6 March 2015 Paper

Design of extensible meteorological data acquisition system based on FPGA

Wen Zhang, Yin-hua Liu, Hui-jun Zhang, Xiao-hui Li

Proceedings Volume 9446, 944612 (2015) https://doi.org/10.1117/12.2180716

KEYWORDS: Field programmable gate arrays, Clocks, Humidity, Meteorology, Analog electronics, Data acquisition, Satellite navigation systems, Sensors, Error control coding, Navigation systems

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In order to compensate the tropospheric refraction error generated in the process of satellite navigation and positioning. Temperature, humidity and air pressure had to be used in concerned models to calculate the value of this error. While FPGA XC6SLX16 was used as the core processor, the integrated silicon pressure sensor MPX4115A and digital temperature-humidity sensor SHT75 are used as the basic meteorological parameter detection devices. The core processer was used to control the real-time sampling of ADC AD7608 and to acquire the serial output data of SHT75. The data was stored in the BRAM of XC6SLX16 and used to generate standard meteorological parameters in NEMA format. The whole design was based on Altium hardware platform and ISE software platform. The system was described in the VHDL language and schematic diagram to realize the correct detection of temperature, humidity, air pressure. The 8-channel synchronous sampling characteristics of AD7608 and programmable external resources of FPGA laid the foundation for the increasing of analog or digital meteorological element signal. The designed meteorological data acquisition system featured low cost, high performance, multiple expansions.

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