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基于NTRIP協(xié)議的虛擬差分GPS接收設(shè)備設(shè)計(jì)
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of a GPS Receiver Based on NTRIP/VRS
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    摘要:

    在分析NTRIP（networked transport of RTCM via Internet protocol）協(xié)議組成及特點(diǎn) 的基礎(chǔ)上，針對(duì)低成本、低精度的GPS OEM板，采用GPRS無(wú)線通信方式，設(shè)計(jì)開(kāi)發(fā)了手持式虛擬差分GPS接收設(shè)備，并進(jìn)行了試驗(yàn)驗(yàn)證。開(kāi)發(fā)的接收設(shè)備是以ARM7為核心，包括無(wú)線通信模塊、GPS OEM板、液晶顯示模塊、優(yōu)盤存儲(chǔ)模塊等，能夠完成GPS數(shù)據(jù)的接收、實(shí)時(shí)處理及顯示，還可通過(guò)USB接口或串口，將完整的NMEA格式數(shù)據(jù)存儲(chǔ)或發(fā)送給上位機(jī)，以備后續(xù)的處理及使用。同時(shí)，設(shè)備具有良好的人機(jī)界面，能夠完成數(shù)據(jù)接收模式、存儲(chǔ)方式以及VRS連接參數(shù)的設(shè)置。試驗(yàn)結(jié)果表明：此GPS OEM板經(jīng)VRS差分后，精度可達(dá)1.24m（95%），能夠?yàn)檗r(nóng)田信息采集提供可靠的數(shù)據(jù)支持。

    Abstract:

    The composition and implement of NTRIP (networked transport of RTCM via Internet protocol) are studied and discussed, a GPS receiver based on NTRIP/VRS are developed and experimented with the low-cost and low-accuracy GPS OEM board. The GPS receiver mainly includes a microprocessor, a wireless communication module, a GPS OEM board, a LCD module, an USB module, and so on. It can receive and process RTCM correction signals from VRS system via GPRS and GPS data. And then more accurate positioning data can be calculated and real-time displayed. The data can be also stored in the USB flash disk or sent to a PC for afterwards processing. The designed interface is friendly and easy to use so that it is convenient to change the parameters of storage, receiving and GPRS. Experiment results indicate that the accuracy of low-cost GPS receiver based on NTRIP/VRS is about 1.24m (95%), and can provide reliable GPS data resource for field information sampling.

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梁靜嫻,張漫,李民贊,曹旻罡.基于NTRIP協(xié)議的虛擬差分GPS接收設(shè)備設(shè)計(jì)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(Z1):165-168. of a GPS Receiver Based on NTRIP/VRS[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):165-168.

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