Acoustic flow measurement method and apparatus

Abstract

The invention discloses an acoustic flow measurement device and a method thereof. The acoustic flow measurement device is adopted between observation stations for sending sound waves to the opposite side simultaneously, then receiving sound waves transmitted by the opposite side, the bidirectional propagation time of the sound waves between the two observation stations is obtained by calculating; the difference and the sum of the acoustic signals bidirectional propagation time are used for reversing the mean velocity and the average temperature between observation stations. The invention can carry on the vertical sample based on sound propagation multi-path effect by only using a pair of sound-source-receiver; as the ocean interior images can be obtained by observing the external measurement of the sea; compared with the traditional method, the synchronous measurement with the large-scale and long time between two points by using a pair of instruments can be realized; the collection performance of the sound propagation can obtain ocean environment parameters with the vast scale in space and the average time which can not be obtained by the traditional point sensor; the method solves the problem that the observing is affected by shipping and fisheries activity.

Description

【Technical field】

[0001] The invention relates to the technical field of marine environment monitoring and the technical field of large-scale river measurement, in particular to an acoustic flow measurement method and device. 【technical background】

[0002] At present, sea current meters (for oceans) or current meters are generally used for the measurement of ocean flow fields and large river flow velocity and temperature fields. Generally, one of these current meters or current meters can only measure the flow velocity of one point or one profile. For example, the Andra current meter with a long history can only measure the current velocity at one point. The Acoustic Doppler Current Profiler developed in the 1980s can generally measure the velocity profile within about 500m. Although marine satellite remote sensing observation and ground wave radar observation technology can continuously obtain large-scale sea surface environmental element data, they cannot obtain the inf...

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