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P/N 95P-6001-00 (October 2020)

Wayfinder DVL Guide

Page 30

EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.

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Summary of Contents for Everywhereyoulook WAYFINDER

Page 1: ...icense exception or other approval from the appropriate U S Government agency before being exported from the United States or provided to any foreign person Diversion contrary to U S law is prohibited WAYFINDER DOPPLER VELOCITY LOG DVL GUIDE P N 95P 6001 00 October 2020 2020 Teledyne RD Instruments Inc All rights reserved ...

Page 2: ...derations 12 Grounding Recommendations 12 Acoustic Integration Considerations 13 Data and Timing Considerations 13 Data Screening 13 Three Beam Solution 13 Ping Timing 14 System Synchronization 14 Software Integration 14 Troubleshooting 15 Communications Issues 15 Identifying EMI 15 Examples of Clean FFT Plots No Interference 16 Examples of Interference 16 Unfavorable Environments 17 CHAPTER 3 USI...

Page 3: ... Serial Adapter 3 Figure 3 Wiring Diagram Using a DB9 Serial Connector 3 Figure 4 XYZ Instrument Velocities 8 Figure 5 Outline Installation Drawing Wayfinder 600 kHz Sheet 1 10 Figure 6 Outline Installation Drawing Wayfinder 600 kHz Sheet 2 11 LIST OF TABLES Table 1 Wayfinder Power Comm Cable Pigtail Wiring 2 Table 2 Wayfinder Mounting Checklist 5 Table 3 Transmit and Receive for the Wayfinder DVL...

Page 4: ...ruments Europe 14020 Stowe Drive Poway California 92064 2A Les Nertieres 5 Avenue Hector Pintus 06610 La Gaude France Phone 1 858 842 2600 Phone 33 0 492 110 930 Sales rdisales teledyne com Sales rdie teledyne com Field Service rdifs teledyne com Field Service rdiefs teledyne com Client Services Administration rdicsadmin teledyne com For all your customer service needs including our emergency 24 7...

Page 5: ... Wayfinder Overview Setting up the Wayfinder System Use this section to connect the Wayfinder to a computer and establish communi cations Install the Wayfinder Tools software to communicate with the Wayfinder Where do I download the Wayfinder software and manual Wayfinder Product Website https teledynerdi myshopify com Documentation Software Installation The customer application for all core Wayfi...

Page 6: ...em begins pinging Cable Wiring Diagram The following table shows the Wayfinder Power Comm cable connections Where shown RX is the in coming signal TX is the outgoing signal Table 1 Wayfinder Power Comm Cable Pigtail Wiring Wire Color Signal Wire Gauge Red Power 22AWG Black Power Return 22AWG Brown COM_GND 22AWG Orange RS 232_TX 22AWG Yellow RS 232_RX 22AWG Green Not Used N A Pigtail cable is one m...

Page 7: ...ther an external DC power supply or battery can provide the 11 4 to 36 7 VDC 24 VDC typical power Source for purchase here Tools Soldering iron wire stripper 22AWG capable heat shrink Figure 2 Wiring Diagram Using the Recommended USB to Serial Adapter RS 232 RX and TX are from the perspective of the Wayfinder Serial adapters or other terminations may follow the opposite convention so the RX and TX...

Page 8: ...ial port 2 Apply 12 to 36VDC power 24 VDC typical power to the system 3 Start the Wayfinder Tools app 4 Click on the Diagnostics tab 5 Click the Run tests button 6 If all the tests pass the Wayfinder is functioning normally 7 If any of the result shows fail contact TRDI Field Service for more information Caring for the Wayfinder System This section contains a list of items to be aware of every tim...

Page 9: ... axis alignment Typical alignment is Beam 3 instrument Y axis rotated 45 rela tive to the vehicle forward axis or Beam 3 facing forward Cable routing Tight mounting spaces next to bulkheads may require rotating the Wayfinder to prevent sharp bends in the cable Flow noise cavitation May need a fairing to reduce flow noise and or cavitation Isolation Hardware Use M5 isolating bushings and washers wh...

Page 10: ...ar a quay wall for instance then a quick rule of thumb is that for every meter of vertical separation between the Wayfinder face and the seabed the same separation is necessary between the Way finder and the Quay wall The Wayfinder also has side lobes which could collect energy backscattered by acoustic obstacles in the beam clearance cone as shown in the outline installation drawing Figure 5 and ...

Page 11: ...icant misalignment in mounting may re quire post processing to align the reference frames However on some vehicles that operate at regular times close to vertical surfaces it is desirable to mount the Wayfinder with Beam 3 in line to the vehicle axis See Three Beam Solution for more information For vehicles that routinely dive and raise in the water column it again may be desirable to mount the Wa...

Page 12: ...er 3 1 4 2 The X axis lies in the direction from Beam 1 towards Beam 2 and the Y axis lies in the di rection from Beam 4 towards Beam 3 The Z axis lies along the axes of symmetry of the four beams point ing away from the water towards the housing The Wayfinder data format assumes the bottom is stationary and that the Wayfinder vessel is moving If Beam 3 is going forward then the Y velocity is posi...

Page 13: ...oise can be reduced by mounting the Wayfinder behind a fairing Flow noise can also be reduced by optimizing the design to conform to the platform hull form being used Avoid mounting the Wayfinder DVL in the input or output area of a thruster as this will reduce the Way finder operating range AND thruster performance Cavitation is the formation of air bubbles due to the reduction of ambient pressur...

Page 14: ...P N 95P 6001 00 October 2020 Wayfinder DVL Guide Page 10 EAR Controlled Technology Subject to Restrictions Contained on the Cover Page Figure 5 Outline Installation Drawing Wayfinder 600 kHz Sheet 1 ...

Page 15: ...Wayfinder DVL Guide P N 95P 6001 00 October 2020 EAR Controlled Technology Subject to Restrictions Contained on the Cover Page Page 11 Figure 6 Outline Installation Drawing Wayfinder 600 kHz Sheet 2 ...

Page 16: ...tial electrical path bypassing the isolation ground filter can occur through seawater The current generated can pass via the Wayfinder anode or scratches in the Wayfinder anodized coating through the seawater and then back to the hull or frame to the vehicle The likelihood of this ground path occurring is increased if the hull of the vehicle is connected to the Power ground of the Wayfinder throug...

Page 17: ...etectable and the correlation value is above a threshold criterion bottom track velocity will be marked Not a Num ber NaN The presence of fish in one or more beams will also cause data outliers The Wayfinder also screens for fish using the information in the intensity data for all four beams If all four beams pass these screening tests the Error Velocity representing the redundant information amon...

Page 18: ...is fed into a larger user supplied acquisition and control system which collects data from other sources as well In such situations it is important to have all the data accurately referenced to a common time base The Wayfinder data ensembles contain a time stamp with a 10 ms resolution from a reading of the real time clock before the ping but the resolution in setting the time is limited to 1 seco...

Page 19: ...to the cable then the EMI can be rapidly reduced as the power reduction goes by square of the separation distance between the source and the Wayfinder cable To avoid problems when the Wayfinder is installed in the final system it is helpful to perform a bench test prior to installation In the bench test the Wayfinder should be exercised along with all the other compo nents that will be installed i...

Page 20: ...hanical devices such as hy draulic power units that create acoustic signals these may interfere with the Wayfinder system and the interference may only be detected when both the Wayfinder and the other device are submerged in a larger bucket or tank of water or somehow acoustically coupled through a hull or structural framework Examples of Clean FFT Plots No Interference The following is a screen ...

Page 21: ...ve action which would give inaccurate velocity measurements In areas of high salinity 35ppt the absorption of the sound by the water column will reduce the altitude capability of the Wayfinder The transmitted acoustic pulse from a Wayfinder is at tenuated as a function of range due to a phenomenon called absorption Absorption is caused by the conversion of some of the transmitted acoustic energy b...

Page 22: ... for configuring testing and viewing data for the Wayfinder system Communication Settings To connect to the Wayfinder 1 Start the Wayfinder Tools app using the desktop shortcut 2 Apply 12 to 36VDC power 24 VDC typical power to the system 3 Select the Port the serial cable is connected to and set the Baud rate from the drop down list to 115200 default setting 4 Click the Connect button Once connect...

Page 23: ...s To record data 1 Press the button next to the Working folder 2 Select the folder to record data into 3 Press the Record button 4 Press the Stop button to stop recording data 5 If the Software Trigger is Enabled on the System tab pressing the Software Trigger button will cause the Wayfinder to ping once Use this to test the trigger function For normal operation the trigger signal is sent via a bi...

Page 24: ...nd can result in shorter search cycles and allowing a faster ping For example if you know the maximum depth in the deployment area is 40 meters set the value slightly larger than 40 m say 45 m instead of default 60 meters Now if the Wayfinder loses track of the bottom it will stop searching for the bottom at 45 m rather than spend time searching down to 60 m Use caution in setting this command to ...

Page 25: ... FAILED 4 If a test fails please contact TRDI support for advice SDRAM Test Fill the memory section with random values along with a checksum of those values Then read the memory back and verify using the checksum FRAM Read the FRAM header and verify that the header value matches the expected value RTC Test Read the current time from the Real Time Clock RTC EEPROM Test Read the DP device ID and ver...

Page 26: ...f the Wayfinder s four receiver channels during a sampling interval To view the FFT data 1 Start Wayfinder Tools and connect to the Wayfinder DVL 2 Click on the FFT tab It takes a few seconds for the FFT plots to display 3 Select the Averaged button to view a moving average of the last 30 FFTs 4 Move devices that may cause interference closer to the Wayfinder Observe changes in the plots Interfere...

Page 27: ...ayfinder to the factory defaults Set the communication Baud rate Setting the Wayfinder s Real Time Clock The Wayfinder system includes an internal Real Time Clock RTC with a one second precision The clock should be set before each deployment To set the RTC 1 Start Wayfinder Tools and connect to the Wayfinder DVL 2 Click on the Tools tab 3 Click the Set Time button 4 Click OK at the System time suc...

Page 28: ...tes can be purchased from TRDI sales Save the file to the computer and unzip the file The file will be named WF_xx xx feature where xx xx is the system serial number Contact your local sales representative if you are interested in upgrading your system The upgrade file is specific to the System ID for which it was ordered DO NOT attempt to install this feature for any other unit Many feature upgra...

Page 29: ...he Wayfinder s Baud Rate The Wayfinder default baud rate is 115200 Using 115200 baud will allow for faster pinging However high baud rates are more susceptible to noise and may result in poor communications The alternative baud rate is 9600 Using it caps the maximum ping rate at 4 to 6Hz To change the Baud rate 1 Start Wayfinder Tools and connect to the Wayfinder DVL 2 Click the Change button 3 De...

Page 30: ...he Wayfinder Inspect the urethane for dents chipping peeling urethane shrinkage hairline cracks and damage that may affect watertight integrity or Wayfinder operation Please contact the TRDI Support Team for advice if there is any damage The vent plug is used by TRDI for a helium leak test and nitrogen purge during manufacturing or repair Other than checking that the plug is not loose there is no ...

Page 31: ...the Wayfinder with low pressure compressed air or soft lint free towels Always dry the Way finder before placing it in storage to avoid fungus or mold growth Do not store the Wayfinder in wet or damp locations Protective Coating Inspection For more protection the Wayfinder assembly has a hard anodize coat Do not damage the surface coatings when handling the Wayfinder Inspect the Wayfinder assembly...

Page 32: ... marking is to assist in determining the restricted substance content recyclability and environmental protection use period of our covered products as required in Chinese law and does not reflect in any way the safety quality or warranty associated with these TRDI products Some homogenous substance within the EIP contains toxic or hazardous substances or elements above the requirements listed in S...

Page 33: ...称 Component Name 有毒有害物质或元素 Toxic or Hazardous Substances and Elements 铅 Lead Pb 汞 Mercury Hg 镉 Cadmium Cd 六价铬 Hexavalent Chromium Cr6 多溴联苯 Polybrominated Biphenyls PBB 多溴二苯醚 Polybrominated Diphenyl Ethers PBDE 换能器配件 Wayfinder Assy X O O O O O 换能器接口电路板 Wayfinder PCBs O O O O O O 外接电缆 External Cable O O O O O O 专用装运箱和泡沫塑料垫 Shipping Case w Foam O O O O O O O 表示该有毒或有害物质在该部件所有均质材料中的含量均在 SJ T 11363 2006...

Page 34: ...P N 95P 6001 00 October 2020 Wayfinder DVL Guide Page 30 EAR Controlled Technology Subject to Restrictions Contained on the Cover Page NOTES ...

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