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Impact Subsea ISP360 Installation & Operation Manual

Profiling sonar
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ISP360
Profiling Sonar
Installation & Operation Manual
Revision Number:
1.1
th
Date
29
November 2024
+44 (0) 1224 460 850 | info@impactsubsea.co.uk | impactsubsea.com
I
mpact Subsea Ltd, Company Number: SC498003, Registered in Scotland,
Registered Office: Silverfield House, Aberdeen Energy Park, Claymore Drive, Bridge of Don, Aberdeen, AB23 8GD, UK.

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  • Page 1 ISP360 Profiling Sonar Installation & Operation Manual Revision Number: Date November 2024 +44 (0) 1224 460 850 | info@impactsubsea.co.uk | impactsubsea.com mpact Subsea Ltd, Company Number: SC498003, Registered in Scotland, Registered Office: Silverfield House, Aberdeen Energy Park, Claymore Drive, Bridge of Don, Aberdeen, AB23 8GD, UK.

  • Page 2: Table Of Contents

    4.1.3 ISP360 Operational Settings ....................23 4.1.6 Other Settings & Logging ....................28 4.1.7 Data Output to Survey / Custom Log File ................33 4.1.8 ISP360 Acoustic Advanced Features ................. 34 4.1.9 Hot Keys ..........................34 5.0 Maintenance & Servicing ......................35 6.0 Output Strings ..........................
  • Page 3 7.0 Theory of Operation ........................37 7.1 Sonar – Basic Principles ......................37 7.2 The Sonar Equation ........................39 7.2.1 Source Level (SL) ....................... 39 7.2.2 Transmission Loss (TL) ....................... 40 7.2.3 Noise Level (NL) ......................... 40 7.2.4 Directional Index (DI) ......................41 7.2.5 Detection Threshold (DT) ....................

  • Page 4: Introduction

    The ISP360 is a new generation of mechanically scanned profiling sonar, providing high accuracy profiling in a very compact form. As a very compact profiling sonar, the ISP360 is an ideal survey profiler for the smallest to the largest underwater vehicles.

  • Page 5: Isp360 Specification

    2.0 ISP360 Specification 2.1 Overview Above: ISP360 Profiler 2.2 Dimensions The dimensions of the ISP360 profiler are shown below: All dimensions are in mm. Document No: 0000.2382 | Version No: 1.1 | 29 November 2024...

  • Page 6: Acoustic & Attitude

    2.3 Acoustic & Attitude Acoustic Attitude Frequency 950kHz Centre Pitch Range ± 90° 650kHz to 1.25MHz Bandwidth Roll Range ± 180° Range 0.3 to 40 meters (1.25MHz) Accuracy 0.2° 0.3 to 80 meters (650kHz) Timing Accuracy 0.35mm (minimum) Resolution 0.1° Beam Angle 1°...

  • Page 7: Acoustic Beam Pattern

    The beam is 1° conical at 1,250kHz and 2° conical at 600kHz. The beam originates from the centre of the ISP360 transducer which is located 50mm from the top of the black acetal boot.

  • Page 8: Installation

    3.0 Installation 3.1 Electrical Installation The ISP360 Profiler is fitted with a SubConn MCBH8M-SS connector as standard. This will mate to a SubConn MCIL8F connector/cable assembly and use a MCDLS locking collar. Other connector options are available upon request. 3.1.1 Connector Pin Out...

  • Page 9: Power

    3.1.2 Power The ISP360 Profiler can accept a DC voltage from 12 to 65V. Do not attempt to power the ISP360 with an input voltage out with this range and be sure to take into account voltage drop on any cable.

  • Page 10: Rs485 Wiring

    3.1.6 Ethernet Wiring Note: The ISP360 cannot be powered over an ethernet connection. Any attempt to use a power over ethernet connection will result in permanent damage to the ISP360. Document No: 0000.2382 | Version No: 1.1 | 29 November 2024...

  • Page 11: Establishing Communications

    3.1.7 Establishing Communications The default dispatch serial settings are RS232, 115,200, N81. If the profiler is tilted from vertical to upside down at least 3 times within the first 10 seconds of applying power then it will temporarily configure the serial interface to RS232, 9600, N81 and output an ASCII message displaying the settings.

  • Page 12: Connector Cleaning

    Of primary importance is the location of the profiler to achieve good profiling capability. The boot end of the profiler (see diagram in section 2.1 for the ISP360) requires to have a clear field of vision of the area to be profiled.

  • Page 13: Alignment With Vehicle

    The 6 o’clock position of the profiler head is about the notch marker on the endcap (circled in blue above). When defining a downward area for the ISP360 to scan over, it will be around this centre point. It is important that the notch marker is installed pointing downwards. The position of the transducer is checked each time it passes this mark.

  • Page 14: Mounting

    This can be achieved by using rubber or plastic strips around the body of the profiler. Impact Subsea offer an acetal clamp as an optional accessory for the ISP360 (P/N: 2422) its dimensions are provided below: Document No: 0000.2382 | Version No: 1.1 | 29...
  • Page 15 The profiler has two flats on either side of the connector endcap end of the body. These are to enable the unit to sit tightly against another flat surface if available. These flats also help prevent the profiler moving when on the workbench for testing. Note: Profiler Boot: The black boot end of the profiler is oil filled under vacuum to remove all air.

  • Page 16: Operation

    Impact Subsea range of underwater sensors. Single sensors can be operated or multiple sensors together. For operation with the ISP360, seaView 3.1.3 or newer will be required. seaView is designed for use with a PC running the Windows 10 or 11, 64-bit operating system.

  • Page 17: Initial Connection

    The default IP address of the ISP360 is 192.168.1.200. The PC should be configured to have a compatible IP address (for example 192.168.1.100). Left click once on the profiler then click on the ‘ISP360’ app at the left-hand side of the screen. This will open the ISP360 profiler application.

  • Page 18: Isp360 Profiler Application

    4.1.2 ISP360 Profiler Application Shown above: ISP360 Application Provided in this section is an overview of the key features of the application: Colour Pallet: To the left of the screen is the colour pallet selector, clicking on this will allow you to select various colour pallet options for the sonar data to be rendered in.
  • Page 19 Image Threshold & Contrast: Using the red handle on the upper and lower part of the colour pallet allows the sonar image data threshold and contrast to be adjusted. This allows the sonar image to be adjusted to suit the requirements of the application at hand: •...
  • Page 20 Regular Access Controls: Along the lower part of the screen, the controls which require most regular access are provided: • All/Individual Profiler o Select which profiler to change settings of. Select ‘All’ to change settings on all Profilers operational within the application at the same time •...
  • Page 21 The drop down ‘Sector’ box allows quick selection of the common scan sectors which are used. • Range Min o This is the distance at which the ISP360 will start to generate profiler points. Any items below this range will not be profiled. • Range Max o This is the maximum distance that the ISP360 will measure to.
  • Page 22 • Energy Threshold o This allows a threshold to be set on the points which are being profiled. The threshold works on the amplitude of the returning acoustic reflection. An Energy Threshold of zero will allow all returns to be used as profiler points. As you move the threshold up, the weaker returns will no longer be converted into profiler points.

  • Page 23: Isp360 Operational Settings

    4.1.3 ISP360 Operational Settings Shown above: ISP360 Setup Clicking the Setup icon will allow access to the operational settings of the profiler. Shown above: ISP360 Setup In this tab, profilers can be connected and removed from the application. Clicking the green + sign will allow further profilers to be added.
  • Page 24 600kHz to 1,250kHz. ‘IS Mode’ allows section of ‘Mode A’ or ‘Mode B’. When running a pair of ISP360 profilers, one profiler should be set to ‘Mode A’ and the other to ‘Mode B’. This will ensure that alternative signalling codes are used to minimise interference between the two profilers.
  • Page 25 Shown above: ISP360 Connection Settings In the Connection tab the serial mode of the profiler (RS232, RS485 or RS485 Terminated) can be configured along with the desired baud rate. The Network configuration of the profiler can also be configured here.
  • Page 26 The ‘Gate Mode’ allows depth/range gating to be turned on or off. Gating allows the ISP360 to complete sector scans more quickly, by using a range for the depth and extending the measurement range as pings are made off centre of the scan sector.
  • Page 27 Shown above: ISP360 AHRS Settings This page allows the configuration of how the sensor has been physically installed on the vehicle or other deployment method. The dropdown menu at the top allows quick selection of the orientation – this will be reflected in the ROV mimic on the right.

  • Page 28: Other Settings & Logging

    4.1.6 Other Settings & Logging On the left-hand side are further controls for the sonar: The Run/Pause button will start the profiler scanning. Pressing again will stop scanning. The Scan Direction button will change the direction which the profiler scans (clockwise or counter-clockwise).
  • Page 29 Shown above: ISP360 AHRS Settings • ‘Polar Grid – turns on/off the overlay on the profiler display • ‘Scan Line’ – turns on/off the red scan line showing the position of the profiler transducer •...
  • Page 30 The Reset View button will restore the profiler display to full screen. This is useful if you want to quickly zoom out of a zoomed area of the profiler display. The Zoom In and Zoom Out buttons allow sections of the profiler display to be magnified.
  • Page 31 The Pipe tool allows a pipe to placed on screen. This is helpful to visualise the placement of the pipe under the profiler, or between a pair of profilers: Shown above: Pipe setup The setup allows the diameter of the pipe, wall thickness, and position information to be entered. The above pipe setup results in the pipe shown below being placed onto the profiler imagery: Shown above: Pipe overlaid on sonar/profiler data Document No: 0000.2382 | Version No: 1.1 | 29...
  • Page 32 The Full Screen button will put the application into full screen mode. Clicking on the Impact Subsea logo will take you to the Impact Subsea website – ideal for downloading the latest version of the seaView software or accessing other technical information.

  • Page 33: Data Output To Survey / Custom Log File

    4.1.7 Data Output to Survey / Custom Log File The start logging/output button will enable/disable the profiler log file creation or data output. The logging/output configuration button will allow creation of a log format or selection/creation of an output string. Clicking on the configuration button will present the following screen: Shown above: Configuration of output string or custom log file The required output string can be selected from the dropdown box.

  • Page 34: Isp360 Acoustic Advanced Features

    The energy level ranges from 0 to 1 where 1 represents full saturation of the ISP360 receiver. An energy level of 0.707 (square root of 2) is the theoretical perfect level as it represents the energy of a pure sine wave with an amplitude utilising the maximum dynamic range of the ISP360.

  • Page 35: Maintenance & Servicing

    The profiler should be stored in its original case, in a cool, dry place. It is recommended that the profiler be returned to Impact Subsea Ltd, on an annual basis to have a health check and service conducted. Document No: 0000.2382 | Version No: 1.1 | 29...

  • Page 36: Output Strings

    Due to the close integration of the ISP360 and seaView, all data collected from the ISP360 requires to be output from seaView. It is not possible to configure the ISP360 to directly output data in stand alone use (no seaView connected) The below are some default output strings available as an output from the ISP360 via seaView.

  • Page 37: Theory Of Operation

    The ISP360 profiler emits a pulse of sound which is 1° conical (at 1250kHz) and 2° conical at 650kHz. Any item which falls within this pulse of sound will be detected and plotted on screen.
  • Page 38 (temperature, salinity & pressure). However, for the purpose of this explanation, we will assume a speed of sound of 1,500m/s. If an acoustic pulse takes 0.1 second to return to the ISP360 sonar after being sent, we can calculate its round-trip travel distance as: Distance = Speed x Time = 1,500 x 0.1...

  • Page 39: The Sonar Equation

    7.2 The Sonar Equation Any equipment which relies on underwater acoustics for ranging purposes falls into the category of a Sonar, hence the operation is governed by the 'Sonar Equation'. A clear understanding of this Equation is essential in the design of any acoustic equipment, and is useful for those wishing to utilise acoustic equipment to its full potential.

  • Page 40: Transmission Loss (Tl)

    7.2.2 Transmission Loss (TL) As the acoustic pulse propagates through the water, it experiences spreading. This causes the energy of the signal to be dispersed over an ever-increasing area, diminishing the energy at any specific point as distance increases. The acoustic pulse will also experience absorption by the water. The rate at which the acoustic pulse is absorbed is directly related to the pulse frequency.

  • Page 41: Directional Index (Di)

    The ISP360 sonar utilises a 1° to 2° conical beam. Meaning that any potential interference effects, which exist outside of this beam, will not have a negative impact on the operation of the unit.

  • Page 42: Warranty

    Replacement or repair is at the discretion of Impact Subsea Ltd. How long does the coverage last? The Warranty Period for the ISP360, purchased from Impact Subsea Ltd, is 1 year from the date of dispatch from Impact Subsea Ltd.

  • Page 43: Technical Support

    9.0 Technical Support Should you require technical support for your ISP360 Profiler, our Support team can be contacted as follows: T. +44 (0) 1224 460 850 E. support@impactsubsea.co.uk W. www.impactsubsea.com An out of hours emergency number is available via the Impact Subsea website.

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