本文選題：河床地形 + 實(shí)時在線監(jiān)測��； 參考：《長江科學(xué)院院報》2017年12期

【摘要】：實(shí)時地形數(shù)據(jù)有利于河床演變分析和工程評估�；诔暡�、4G無線傳輸、網(wǎng)絡(luò)數(shù)據(jù)庫等技術(shù),研發(fā)了河床地形實(shí)時在線監(jiān)測系統(tǒng)。為消除溫度、鹽度等因素對測量結(jié)果的影響,設(shè)計(jì)了超聲波聲速校核裝置:利用固定校核面反射超聲波信號,通過計(jì)時器獲取超聲波發(fā)射和反射信號時間間隔,從而反演超聲波聲速,實(shí)現(xiàn)對聲速的實(shí)時校正。系統(tǒng)應(yīng)用到姚江大閘下游河床地形監(jiān)測,監(jiān)測時段內(nèi)河床地形淤積了0.041 m,對應(yīng)時段內(nèi)GPS-RTK測量結(jié)果為河床地形淤積了0.050 m,2種方法測量結(jié)果基本一致。實(shí)踐應(yīng)用結(jié)果表明本系統(tǒng)監(jiān)測數(shù)據(jù)可靠,能用于地形實(shí)時監(jiān)測中。
[Abstract]:Real-time terrain data is useful for river bed evolution analysis and engineering evaluation. Based on the technology of wireless transmission and network database, a real-time online monitoring system for river bed topography is developed. In order to eliminate the influence of temperature, salinity and other factors on the measurement results, the ultrasonic speed check device is designed. The ultrasonic signal is reflected by the fixed check surface, and the time interval between the ultrasonic emission and the reflection signal is obtained by a timer. Thus the ultrasonic velocity can be retrieved and the sound velocity can be corrected in real time. The system has been applied to the topographic monitoring of the lower reaches of the Yaojiang sluice. The results of the monitoring period are 0.041 m, and the results of GPS-RTK measurement in the corresponding period are almost the same as those of the two methods. The practical application results show that the monitoring data of this system are reliable and can be used in real-time terrain monitoring.
【作者單位】： 廣東水利電力職業(yè)技術(shù)學(xué)院水利工程系;河海大學(xué)水利水電學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51309083) 廣東水利科技創(chuàng)新項(xiàng)目(2016-03) 重大科學(xué)儀器設(shè)備開發(fā)專項(xiàng)(2011YQ070055)
【分類號】：TP274;TV147

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