Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Multibeam Transducer: 2D Imaging Sonar

Multibeam TransducerMultibeam Echo SounderMultibeam Echo Sounderimage Sonarimage SonarMultibeam Transducer

BII-7660 series high frequency high resolution multibeam transducers are designed for uses in 2D image Sonar, underwater floor/bottom mapping, sector scanning, navigation, object detection, target tracking, obstacle avoidance in tens or hundreds meter range.

The transmitting array and receiving array in BII-7660 series are standalone and operate independently. The curved transmitting array emits a fan-shape beam (or the linear transmitting array emits a steered fan-shape beam) to insonify the sector of interest (the field of view), The linear receiving array has fan-shape beams perpendicular to the transmitting beam and the receiving beam can be steered to the direction of interest.
Both transmitting and receiving array are broadband to support broadband Sonar signals (such as FM/Chirp, Ricker etc.). Acoustic sweeping (2D scanning) of the horizon or vertical can be achieved with digital beamforming technology (digital beamforming is not provided from BII).

Multibeam TransducerMultibeam Echo Sounder

Note: Transducer bandwidth = resonance frequency (or operating frequency)/quality factor.

BII-7660    Multibeam SONAR Transducers: 2D Imaging Sonar

Suggested Application

2D Image Sonar
Underwater Floor Mapping
Forward-looking Sonar
Object/Target Detection
Obstacle Avoidance, Target Tracking
Diver Hand-held System
Sector Scanning
General Purpose Sound Projector
Bioacoustic Research
Underwater Robotic and Vehicle (ROV, AUV, UUV)
Beamforming and Multibeam Technology, Array Signal Processing
Seafloor Scattering, Roughness, Penetration, reflection and other properties

Features Related Products

Broadband, Low Q
Wide Field of View
High Resolution
Long Range
Easy Mounting, Light Weight, Portable

BII-1000 Low Power, Low Noise, Wideband Preamplifier
BII-2030 Envelope Detection of Sonar Signals
BII-5000 Power Amplifier: SONAR/HIFU Transducer
BII-6000 Sonar Transducer Impedance Matching and Tuning
Sonar Signal Generation

Specification

Multibeam Transducers Multibeam TransducerMultibeam TransducerMultibeam Echo Sounder
BII-7660 Series BII-7661 BII-7662 BII-7663 BII-7664 BII-7665
Frequency: 240 kHz 450 kHz 120 kHz 70 kHz 38 kHz
Echo Ranging: ≤ 250 m ≤ 120 m ≤ 450 m ≤ 600 m ≤ 1000 m
Size (LxHxD): 218x156x80mm 114x156x80mm 365x220x80mm N/A N/A 
Beamwidth: 3ºx1.5º 1.6ºx1.5º 4ºx1.5º 0.9ºx1.4º 0.9ºx1.4º
Transmitting Array          
Array Geometry: Curved Array  Curved Array   Curved Array   Line Array   Line Array  
Transmitting Channel: 1 1 1 39  49 
Element Spacing (mm):  N/A N/A N/A 22 33 
Horizontal Beamwidth (-3dB):
Or Across-Track
150º 150º 150º 92º 100º
Vertical Beamwidth (-3dB):
or Along-Track
1.6º 0.9º 0.9º
Beam Steering Range: N/A N/A N/A ±28º ±35º
Quality Factor Q: ≤ 4 ≤ 4 ≤ 4 ≤ 4 ≤ 4
Pulsed Signal Type: Ricker/CW/Chirp/FM Ricker/CW/Chirp/FM Ricker/CW/Chirp/FM Ricker/CW/Chirp/FM Ricker/CW/Chirp/FM
Maximum Drive Voltage: 600Vrms 600Vrms 600Vrms 600Vrms 600Vrms
Receiving Array:
Array Geometry: Line Array Line Array Line Array Line Array Line Array 
Receiving Element: 64 64 64 39 49
Element Spacing (mm):  Fixed   Fixed   Fixed 22 40
Horizontal Beamwidth (-3dB):
Or Across-Track
1.5º 1.5º 1.5º 1.4º 1.4º
Vertical Beamwidth (-3dB):
or Along-Track
12º 6.4º 16º 92º 100º
Beam Steering Range: ±90º ±90º ±90º ±28º ±35º
Quality Factor Q: ≤ 4 ≤ 4 ≤ 4 ≤ 4 ≤ 4
Special Note: 1. Exclusive to BII-7664:
    When buyer orders BII-7664, BII ships 78 BII-7605s (default: Bolt Fastening, 70kHz, 1m cable/wire leads).
    Buyer shall manufacture supportive frames at buyer's expenses and set up the "cross" line array.
2. Exclusive to BII-7665:
    When buyer orders BII-7665, BII ships 98 BII-7603s (default: Bolt Fastening, 38kHz, 1m cable/wire leads).
    Buyer shall manufacture supportive frames at buyer's expenses and set up the "cross" line array.
3. Reconfigurable array pattern/geometry can be implemented with the array elements BII-7605s or BII-7603s.

Multibeam Transducers Multibeam Echo SounderMultibeam Echo Sounder
BII-7660 Series BII-7666 BII-7667 BII-7668
Frequency: 240 kHz 450 kHz 450 kHz
Echo Ranging: ≤ 250 m ≤ 100 m ≤ 100 m
Size (LxHxD): 218x156x80mm 114x103x80mm 114x103x80mm
Beamwidth: 3ºx3.2º 3.2ºx3.2º 3.2ºx3.2º
Transmitting Array      
Array Geometry: Curved Array   Curved Array   Curved Array  
Transmitting Channel: 1 1 1
Horizontal Beamwidth (-3dB):
or Across-Track
150º 70º 150º
Vertical Beamwidth (-3dB):
or Along-Track
3.2º 3.2º
Beam Steering Range: N/A N/A N/A
Quality Factor Q: ≤ 4 ≤ 4 ≤ 4
Pulsed Signal Type: Ricker, CW, Chirp/FM Ricker, CW, Chirp/FM Ricker, CW, Chirp/FM
Maximum Drive Voltage: 600Vrms 600Vrms 600Vrms
Receiving Array
Array Geometry: Line Array Line Array Line Array
Receiving Element: 32 32 32
Horizontal Beamwidth (-3dB):
or Across-Track
3.2º 3.2º 3.2º
Vertical Beamwidth (-3dB):
or Along-Track
12º 6.4º 6.4º
Beam Steering Range: ±90º ±90º ±90º
Quality Factor Q: ≤ 4 ≤ 4 ≤ 4
       
 
Miscellaneous: BII-7660 Series Transducer
Digital Beamformer: Not included
Power Amplifier: BII-5000 Power Amplifier: SONAR/HIFU Transducer, Order separately.
Impedance Matching & Tuning: BII-6000 Available, Order separately. BII does not integrate BII-6000 into the transducer housing.
Preamplifier: BII-1090 Hydrophone Preamplifier With Programmable Gain, Order separately.
BII-1030 Hydrophone Preamplifier With Variable Gain, Order separately.
To drive long cable, preamplifiers shall be used with the receiving array.
Envelope Detection: BII-2030 Envelope Detection of Sonar Signals, Order separately.
Operating Depth: 300m
Mounting Options: 1. End-face Mounting: (EFM)
2. Bolt Fastening Mounting (Stainless Steel): (BFMSS), Exclusive to BII-7664 and BII-7665.
Click Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Transmitting Cable: One channel, Shielded cable (SC)
Wiring:
White or Red Conductor: Signal +; Black Conductor: Signal -; Cable Shield: To System Grounding/Common.
Orientation of Receiving Array: The linear array is located at the center of the encapsulation case.
1. in default:
    Ch1 is located at the rightest position of the array with Front View or Receiving Face View
    Ch32 or Ch64 is located at the leftest position of the array in Front View or Receiving Face View
2. If the orientation of the linear array is not in default, BII shall specify the orientation in data sheet.
Receiving Cable: Coax: (Coax)
32 or 64 Channels (depending on the part number)
Coax Conductor: Signal; Coax Shield: Signal Common.
Cable Length: Standard 0.2m or customized length up to 0.5m (maximum)
Connector: Wire Leads (WL)
Operating Temperature: -10°C to +60°C
Storage Temperature: -40°C to +60°C
How to Order: Click How to Order.
Transducer Wiring: Click Transducer Wiring for detailed wiring information.

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