Bullet Sensors & Transducers e-Digest, Vol. 146, Issue 11, November 2012: Products and Standardization News

    (ISSN 1726-5479)

 

 

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New Dual Wideband Piezo Composite Frequency Transducer
for Marine Applications

 

Morgan Technical Ceramics has introduced a new dual wideband piezo composite frequency transducer for a range of marine applications including depth sounding, fish finding or guidance and Doppler speed metering. A key advantage of the new 09222/000 transducer is that it offers wideband dual frequency operation through the same slot.

 

Compared with conventional designs, which have a single bandwidth of 195 to 205 kHz, the new 09222/000 transducer has dual ranges of 55-89 kHz and 150 to 220 kHz, with a side lobe level of less than -25 dB, compared to -20 dB. The transducer uses piezo composite technology that extends bandwidth, suppresses side lobes, improves beam uniformity and increases figure of merit (FOM) operation. The wide bandwidth it delivers has a short ring-down time which enables the user to distinguish between objects close together within the transducer’s field of view, typically between fish close to the sea bed.

 

Using wide bandwidth also means that it is possible to use more advanced imaging algorithms such as Chirp, which requires driving with a frequency sweep, or Synthetic Aperture Focusing Techniques (SAFT). Users also have the options of using the higher frequency for increased target resolution, while the low frequency mode remains available for better deep-water performance.

 

From the installation point of view, having a wide bandwidth dual frequency transducer avoids having to drill two separate slots in the hull and reduces the need for fairings protruding beneath the boat.  Fitted into a stainless-steel housing, with alternative materials available, the transducer is RoHS (Restriction of Hazardous Substance) compliant.

 

In addition to its standard specification, Morgan Technical Ceramics can also offer customised geometry, centre frequency and bandwidth.  Composite technology is available with a centre frequency of 50 kHz – 5 MHz and a bandwidth up to 70 per cent.  The emitting face can be up to 200 mm square or 150 mm diameter to allow for a tight beam width and high power.  With appropriate encapsulation and cabling, transducers can also be designed to withstand deep-sea environmental conditions and down hole applications.

 

With a long track-record of designing custom transducers for sonar applications, engineers at Morgan Technical Ceramics offer world-leading materials for sonar applications including Navy types I, II, III V and VI in addition to custom formulations and single crystal materials.  The technology can be adapted to higher frequency ranges and a variety of sizes and shapes that require dual-frequency operation. With in-house underwater acoustic test tanks and pressure testing facilities to validate performance, Morgan Technical Ceramics is able to offer customised solutions in short lead times.

 

 

About Morgan Technical Ceramics

 

Morgan Technical Ceramics manufactures components and sub-assemblies using an extensive range of materials, including structural and piezoelectric ceramics, dielectrics, braze alloys, and specialist coatings. It works with manufacturers’ design and R&D teams at local, national and international level on projects from concept and feasibility studies through prototype development to full production. The business employs some 2,500 people and has 23 manufacturing sites worldwide across Europe, the US, Mexico, China and Australia.

 

Morgan Technical Ceramics is a business within the Morgan Ceramics Division of The Morgan Crucible Company plc, one of the world's leading advanced materials companies. The company specialises in the design, manufacture and marketing of ceramic and carbon products which are used in a wide range of applications, from transport and telecommunications to fire protection and medical instruments. Morgan Crucible is listed on the London Stock Exchange in the engineering sector.

 

 

Contact:

 

Kristin Nugent,

Morgan Technical Ceramics

Bewdley Road, Stourport,

Worcestershire, DY13 8QR, USA

Tel.: 617-367-0100 x148

E-mail: Kristin.nugent@mgr1.com

Web: http://www.morganplc.com

Piezo Composite Frequency Transducer 09222/000

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