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hydrophone n.水聽器;水中聽音器;水中地震檢波器;漏水檢查器。

hydrophyte

In the recent years , along with the development of the production technology of the vector hydrophone , more and more people notice the importance of the detect and measure technology of underwater acoustic vector signal , and it is applied in more and more fields 近年來,隨著矢量水聽器的制造技術的不斷進步,使得水下聲矢量信號的探測和測量技術日益受到人們的關注,應用領域也不斷擴大。

The research on the characteristics of an interferometric fiber - optic hydrophone element with a concentric mandrel including an enhanced sensitivity layer and the results derived from it are propitious to optimize the design and performances of the hydrophone 論文對含彈性增敏層的同軸干涉型光纖水聽器的特性分析和結論對該結構光纖水聽器的優化設計和性能改進有重要的指導意義。

A new direction of arrival estimation method is proposed using a single vector hydrophone , which is composed of three spatially co - located but orthogonally oriented velocity hydrophone plus another co - located pressure hydrophone 摘要提出了一種基于單個矢量水聽器的二維波達方向估計方法,該矢量水聽器由三個空間軸向垂直的振速水聽器和一個聲壓水聽器構成。

Demonstrate the theory of noise cancelling based on the vector hydrophone and point out the concept of the optimal delay . deduce the estimation of doa ( direction - of - arrival ) equations in the presence of noise . 4 然后在此基礎上論證了基于矢量水聽器的本艦噪聲的抵消原理,指出了一個最佳延遲的存在,并且推導了在本艦噪聲背景下目標方位估計的方程。

In the paper , it is discussed to the winding of hydrophone array , the deviation and depth difference between focus and hydrophone array , and the deviation of time - distance curve , and presents a way to solve the problems 本文針對排列彎曲、炮點偏移距大小、炮點與檢波器不在同一深度以及時距曲線偏移等問題進行了討論,并提出了校正和解決的方法。

The main content of this paper is to contact signal processing technology of the vector hydrophone with shrac21060 , and to realize real - time digital signal processing of underwater acoustic vector signal 本論文的內容就是將聲矢量信號的處理技術與并行處理器件shrac21060緊密聯系起來,實現聲矢量信號的實時處理。

Light source and the signal processing device are placed on the shore in the optical fiber hydrophone system using phase - generated - carrier technique , which make the wet end with no electronic devices 采用相位載波調制解調技術( pgc )的岸基陣光纖水聽器信號檢測方案將光源與信號處理都放在岸上,系統濕端全光纖化。

This dissertation is part of the basic studies on large scale fiber - optic hydrophone array . the researches in this dissertation provide a foundation for edfa development in our institute 本文的研究是發展大規模光纖水聽器陣列的一個基礎部分,為研制適合光纖水聽器陣列用的edfa打下了良好的基礎。

The output of vector hydrophone contains the spatial direction information , in the other word , the output has different phase gradient to signal with different direction 它是利用了矢量水聽器四個陣元的輸出所蘊含的空間方位信息,通過對一個方向信號延遲的補償相減達到此方向信號的抵消的目的。

Flow noise elimination of this hydrophone is not revolved . the sensing sound model of the extended hydrophone is developed based on the principle of the ordinary fiber optic hydrophone 本文對這種成組光纖水聽器的特性展開深入的理論和實驗研究,不涉及流噪聲抑制方面的討論。

As the fiber hydrophone system is developing to large scale array , it is important to obtain enough incident light power of the fiber hydrophone system 隨著光纖水聽器技術的不斷成熟,目前正往大規模陣列方向發展。保證足夠強的入射光功率對光纖水聽器系統的有效工作至關重要。

The length between each unit is 0 . 16m , and the whole hydrophone is 0 . 52m long . in a normal cistern , the directivity and sensitivity of the hydrophone is tested with an impulse method 在非消聲水池中,用脈沖方法,采用測試信號頻率為4688hz , 5度為間隔,測得其指向性。

Interferometric optic fiber hydrophone has the highest sensitivity among current underwater acoustic sensors , so it has a high potential of being applied in military uses 干涉型光纖水聽器作為水下聲場探測靈敏度極高的元件,在軍事上具有巨大的潛在應用價值。

There are several ways of estimating direction of arrival in use of the vector hydrophone : acoustic intensity detection , beam revolving and vector equations 利用矢量水聽器進行方位估計的方法主要有聲強檢測、旋轉波束和矢量方程組等。

Within an hour , ekin spotted a group of 4 - 5 adults , just east of the airport . he quickly came down the mast and started listening to the hydrophone 在不足一小時內,伊健已找到一個約有4 5條海豚的豚群,在機場以東水域出沒。

Every unit of the hydrophone is designed to has the same sensitivity - 163db ( 0db = 1rad / upa ) with an ordinary hydrophone 采用相位產生載波( pgc )調制解調方法,實現了光纖水聽器信號的穩定輸出。

The hydrophone is the bigger enough compared to the wavelength of the sound , the directivity is the more distinctness 成組光纖水聽器尺寸越大,接收信號波長越短,其指向性越明顯。

Acoustics - measurement and characterisation of ultrasonic fields in the frequency range 0 . 5mhz to 15mhz - hydrophone method 聲學在0 . 5 15mhz頻率范圍內的超聲場特性及其測量水聽器法

Transfer function method with each other change the place of two hydrophone consistency calibration in the coupled chamber 在耦合腔中實現雙水聽器一致性校準的易地交換傳遞函數法