Company that develops linear and planar hydrophone arrays. The
arrays are designed to be applicable in passive SONAR for
listening, monitoring and direction-finding.
SONAR (SOund
Navigation And
Ranging) is a technique that uses sound
propagation (usually underwater, as in submarine navigation) to
navigate, communicate with or detect objects on or under the
surface of the water, such as other vessels and submarines. Two
types of technology share the name "sonar": passive sonar
is essentially listening for the sound made by vessels;
active sonar is emitting pulses of sounds and listening
for echoes. The Sensing procedure in Sonar System usually is done
by Hydrophones.
A hydrophone is a microphone designed to be used
underwater for recording or listening to underwater sounds. Most
hydrophones are based on a piezoelectric transducer that generates
electricity when subjected to a pressure change. Such piezoelectric
materials, or transducers, can convert a sound signal into an
electrical signal since sound is a pressure wave. The new
Technology of making Hydrophone is Acousto-Optic Transducer that
made by Fiber Optic Sensing Technology.
Fiber optic Hydrophones is one major type of hydrophones that are
of great importance to underwater and naval acoustics. The chief
advantage is that problems related to the integration of
traditional underwater acoustic sensing and sonar data transmission
can be resolved from an entirely new perspective, thus improving
the reliability and possibly decreasing the total cost of
manufacture, operation and maintenance of the sonar system.
Because of its inherent directivity and unique phase processing,
the Fiber Optic (FO) hydrophone possesses potential advantages in
the detection of quiet underwater acoustic targets emitting low
frequency and ultra-low frequency noise. Engineering applications
for FO hydrophone have gradually emerged from the research
laboratory, and will play an active role in the development of
future sonar systems. A brief overview of the two technology
(Piezoelectric and Fiber Optic) is presented from the viewpoint of
sonar design, including the basic physics, principle of operation,
key techniques, and applications.
Comparison between Piezo-Electric and Fiber Optic
Sensors
| Parameter | Piezoelectric Acoustic Sensor | Fiber Optic Acoustic Sensor |
|---|---|---|
| Transducer Type | Piezo-electric Transducer | Opto-mechanical Transducer |
| Needing Electrical power at sensor point | Sensors and Pre-amplifier are driven by electric power | Sensors are not driven by electric, It works by laser light |
| Sensor Output | Electrical Signal | Optical Signal |
| Need post Electronic Processor at Sensor Point | Need | Not Need |
| Long Range data transferring method | Convert Electrical Signal to Optical Signal By Optical Modem then transfer on long fiber Optic Cable | transfer on long fiber Optic Cable |
| Multiplexing Methods for Array | All Hydrophones are independent. So there are many problems in multiplexing | Multiplexing is possible |
| Maximum Cable length | **0~**0 Km, with repeater device in fiber cable | *5 Km. Repeater device using in this method is impossible |
| Array weight & size | Big size and heavy weight | Small size and lightweight |
| Minimum Acoustic Frequency Detection | >**0 Hz | >*0 Hz |
| 国家: | China |
| 型号: | - |
| 离岸价格: | 获取最新报价 |
| 位置: | - |
| 最小订单价格: | - |
| 最小订单: | - |
| 包装细节: | - |
| 交货时间: | stock |
| 供应能力: | - |
| 付款方式: | - |
| 產品組 : | - |
