An acoustic suspended monitor (ASSM) has been developed for the observation of suspended sediment concentration profiler in water, monitoring pollutants in water and for the studies of coastal sediment transportation...An acoustic suspended monitor (ASSM) has been developed for the observation of suspended sediment concentration profiler in water, monitoring pollutants in water and for the studies of coastal sediment transportation and deposition. The determination of the main technical parameters and the methodology of resolving the keytechniques and laboraftory calibration are reviewed. The ASSM was applied to observe the suspended sediment in theChangjiang Estuary, whose typical suspended sediment concentration profilers have been obtained.展开更多
A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several ma...A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several main technical parameters of the system, such as optimum frequency, sound transmission power, aperture of transducer etc., airs provided. And some key problems on the acoustic observation of suspended sediments, such as data processing of a time--Varying stochastic process, compensation of sound propagation loss in complicated conditions and in-situ calibration of sediment concentration, are discussed in detail. The results of the analysis could be helpful to the development and application of a specific acoustic backscatter instrument (e.g. the acoustic sediment concentration profiler, the acoustic Doppler current profiler etc.).展开更多
文摘An acoustic suspended monitor (ASSM) has been developed for the observation of suspended sediment concentration profiler in water, monitoring pollutants in water and for the studies of coastal sediment transportation and deposition. The determination of the main technical parameters and the methodology of resolving the keytechniques and laboraftory calibration are reviewed. The ASSM was applied to observe the suspended sediment in theChangjiang Estuary, whose typical suspended sediment concentration profilers have been obtained.
基金This work is supported by the National Natural Science Foundation of China!(No. 49476273)
文摘A theoretical analysis of designing an acoustic backscatter system for observations of suspended sediments has been made through a derived sonar equation. Some formulae and data for reference in determining several main technical parameters of the system, such as optimum frequency, sound transmission power, aperture of transducer etc., airs provided. And some key problems on the acoustic observation of suspended sediments, such as data processing of a time--Varying stochastic process, compensation of sound propagation loss in complicated conditions and in-situ calibration of sediment concentration, are discussed in detail. The results of the analysis could be helpful to the development and application of a specific acoustic backscatter instrument (e.g. the acoustic sediment concentration profiler, the acoustic Doppler current profiler etc.).
