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Acoustic flow measurement method and apparatus

A current measuring device and acoustic technology, applied in the field of marine environmental monitoring, can solve problems affected by shipping and fishing activities

Inactive Publication Date: 2009-01-07
SECOND INST OF OCEANOGRAPHY MNR
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and to propose an acoustic flow measurement method and device, which can meet the large-scale and long-term continuous observation requirements of the near-shore marine environment, and solve the problems caused by shipping and fishery in the observation. Questions about activity impact

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  • Acoustic flow measurement method and apparatus
  • Acoustic flow measurement method and apparatus

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Embodiment Construction

[0028] refer to figure 1 , 2 , 3, 4, 5, acoustic flow measurement device, including

[0029] Battery unit: It is the energy supply device of the whole system; it adopts the rechargeable battery car battery sold in the general market.

[0030] Clock unit 18: receives the time signal of GPS satellites through the GPS antenna, and provides a standard time signal for the entire system;

[0031] Signal generation and processing unit: including a signal generation and transmission part and a signal reception and processing part. The signal generation and transmission part generates a carrier signal of a certain frequency, which is input to a modem for code modulation. After modulation, the signal is input to a power amplifier for energy amplification, and then impedance matching Loaded into the transducer, the transducer emits sound waves; the receiving processing part converts the received sound wave signal into an electrical signal through the transducer, performs pre-amplificat...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/18G01P5/24G01K11/22
Inventor 朱小华郑红廖光洪梁楚进
Owner SECOND INST OF OCEANOGRAPHY MNR
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