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Vector Compass

 

 
 

 

AvL Technologies

 | Proprietary – Content is Subject to Change without Notice                 

 

 

10 

 

5.

 

Issues and Troubleshooting 

 

 

Issue 

Description 

Corrective Action 

Heading on Remote GUI 
reads zero 

Vector Compass not 

communicating with controller 

Check Connections to device  
 
Check the configuration items for 
communication to the Vector 
Compass  
 
Check that Vector compass is selected 
as heading source 
 
Perform Home command; check that 
sensor output variable “Vector 
Compass Message Count” is counting. 

Inconsistent/Incorrect 
Heading 

Heading is not 

consistent/incorrect after 
performing compass read 

Check connections at GPS pucks, set 
“Heading Averaged” to “No” in Core 
Configuration.   
 
Check for correct “Vector Compass 
Heading Offset” in Core Configuration.   
 
Check for overhead obstructions of 
Vector Compass GPS device, check for 
correct/ accurate “Time Source”.   
 
Check that GPS Pucks and their 
mounting bracket are not damaged or 
loose.   

 

 

Summary of Contents for Vector Compass

Page 1: ...AvL Vector Compass Setup Operation Guide Revision R11 9 0 This document describes the configuration concepts and operation of the AvL Vector Compass system AvL Technologies 900 159 021 Appendix V ...

Page 2: ...oduction Contents 1 Introduction 2 2 Setup Guide 2 2 1 Hardware 2 2 2 Software 2 2 3 Hardware Connection 3 2 3 1 Serial Communication Connection 3 2 3 2 Ethernet Communication Connection 3 3 Configuration 3 3 1 Core Configuration Items 3 3 2 Target Configuration Items 6 3 3 Signal Configuration Items 6 3 4 Feed Configuration Items 6 4 Operation 6 4 1 Functional Overview 6 4 2 Sensor Outputs 8 4 3 ...

Page 3: ...n of the associated configuration items that are accessible through the AAQ GUI as part of the AvL AAQ Controller The Vector Compass system uses GPS satellite information to produce an accurate heading without the need for an internal compass or manual compass setting This negates any heading inconsistencies that would be introduced by magnetic interference in traditional compass components 2 Setu...

Page 4: ... are not an option for the hardware associated with this module 2 3 2 Ethernet Communication Connection Ethernet connection is not an option for the hardware associated with this module 3 Configuration 3 1 Core Configuration Items Path Main Window View Configuration Core Level 4 The AVL Vector Compass uses configuration items to allow the user to tailor the module s operation and interaction with ...

Page 5: ...Vector Compass AvL Technologies Proprietary Content is Subject to Change without Notice 4 Figure 2 Core Configuration keyword Vector Figure 3 Core Configuration keyword Heading Source ...

Page 6: ...e offset in degrees of the vector compass device This is set at the factory and should not be changed by the user Vector Compass Separation 4 Float 0 0001 to 10 0 Separation parameter used to initialize the vector compass This is set at the factory and should not be changed by the user Vector Compass Scan Width 1 Float 0 0 to 400 0 Scan width to use during an Acquisition with the Vector Compass as...

Page 7: ...s position information By using a second GPS unit at a measured distance from the first and comparing data between the two positional errors can be mathematically eliminated The heading information gleaned by this process avoids most of the interference and magnetic errors seen in traditional compass systems The AvL Vector Compass is used to compute a heading as well as DGPS Differential Global Po...

Page 8: ...Controller Manual section for additional information on available heading sources It is important to note that when the Vector Compass option is fitted the standard compass as part of the NAV RIOM is generally omitted Once the Vector Compass is selected the system is ready to be used The vector compass information will be read by the controller during the antenna Home process and produce a Heading...

Page 9: ...iption Vector Compass Altitude The System altitude as read from the compass data Vector Compass Horizontal Dilution The error of precision in the horizontal dimension based on the satellites used A high value could result in poor resolution Vector Compass Latitude The System Latitude as read from the compass data Vector Compass Longitude The System Longitude as read from the compass data ...

Page 10: ...Vertical Dilution The error of precision in the vertical dimension based on the satellites used A high value could result in poor resolution Vector Compass Heading Indication of corrected compass heading including any applied offsets Vector Compass Raw Heading Indication of compass heading from the raw NEMA string value 4 3 Module Windows 4 3 1 Device Window A Device Window is not needed for monit...

Page 11: ... compass is selected as heading source Perform Home command check that sensor output variable Vector Compass Message Count is counting Inconsistent Incorrect Heading Heading is not consistent incorrect after performing compass read Check connections at GPS pucks set Heading Averaged to No in Core Configuration Check for correct Vector Compass Heading Offset in Core Configuration Check for overhead...

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