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ETB Pegasus User Manual

Limb phasing system
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Limb Phasing System
User Guide
V5-6-5
July 2010
Page 1 of 31

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  • Page 1 Limb Phasing System User Guide V5-6-5 July 2010 Page 1 of 31...

  • Page 2: Table Of Contents

    Frequently Asked Questions ................31   1. Introduction This user guide is intended to take you through the process of using the Pegasus Limb Phasing System to gather data on a horse’s gait, retrieving that data, and finally analysing it.

  • Page 3: Glossary

    .pdf = file in Portable Document Format (by Adobe Systems) SD = Secure Digital (memory card) Trial = a test, using the Pegasus Limb Phasing System to gather and analyse data USB = Universal Serial Bus 3. Sensors - essential information (extract from the Sensors...
  • Page 4 The battery in Pegasus-I is also rechargeable NiMH but is not removable. It is permanently wired for maximum reliability and the end of life of the battery means the end for Pegasus-I also. It should be returned solely to ETB for battery removal and disposal.

  • Page 5: Poseidon Software - A Brief Introduction

    4. Poseidon software – a brief introduction: Poseidon is the software that you need at every stage apart from actually recording data and charging the sensors’ batteries. To activate it, click on the Poseidon icon on the desktop: This brings up the main screen: Page 5 of 31...
  • Page 6 Note the soft key “buttons” to the left and the information below the centre of the screen: it is worth pausing to read this information for each screen you encounter. If you click on one of the “buttons”, a new screen appears: for example, Sensors has been selected here: Page 6 of 31...

  • Page 7: Sequence Of Operations (Overview)

     Open the case and check that all units are connected to their USB cable.  Check both USB connections are made to the notebook PC (these should never normally be removed).  Ensure Pegasus-S unit is switched off.  Ensure the notebook PC power supply is connected and plugged into a power socket.
  • Page 8 Bend it so it runs parallel to the case side: (The section of cable that plugs into the notebook PC carries non-hazardous low voltage.) Page 8 of 31...
  • Page 9  Leave overnight to enable the sensors to fully charge, which takes around 12 hours. The sensors should have the following LED indicators lit:  Pegasus-I amber charging LED (next to the battery symbol on the case). This will remain on while the sensors are connected to the notebook PC with the latter switched on (occasionally, this may change to blue but this is of no consequence: charging is unaffected).

  • Page 10: Preparation Immediately Before A Trial

    7.1. Preparation for a trial when the GPS speed, location and stride length data are required  Positioning the Pegasus-S outdoors or near a window is generally needed, in order to receive the required signals from several GPS satellites.  Switch on Pegasus-S (small slide switch).

  • Page 11: Preparation For A Trial When Only Stride Duration And Limb Phasing Is Required

     When all sensors have enough recording time for data collection, click on Done.  Prepare Pegasus S is then enabled: click on it. You are then advised that previous speed data will be deleted. Select Yes, then Done. The units are now ready for a trial.

  • Page 12: Dual Sensor System

    The power supply has been removed from the right hand side of the box, and an insert that holds the four Pegasus-I sensors and the Pegasus-S sensor takes its place. See photograph below. The mains power supply is connected as normal, but is stored in the supplied rucksack.

  • Page 13: Performing A Trial

    This will ensure that all sensors remain adequately synchronised.  Take the four Pegasus-I units plus 4 brushing boots, the Pegasus S unit (where used) and the silk (where used) to the horse.

  • Page 14: Pegasus-I Placement

    Velcro strap only. Make sure the strap is tight and secure or the results will be degraded:  Take a Pegasus-I and press the button once, checking that the unit is logging data (green LED blinking).  Place it in a clear polythene bag to keep out dust and moisture.
  • Page 15  Fit the Pegasus-I into the appropriate brushing boot pocket, taking careful note of the label indicating its position on the animal. The unit should be upright (not inverted), and the LEDs should face outwards: Page 15 of 31...
  • Page 16  Once in the pocket the second Velcro strap should then be fastened. Again, make sure the strap is tight and secure:  Repeat these steps for the three remaining Pegasus-I sensors.  The horse should now be exercised as required for the trial.

  • Page 17: Retrieving And Analysing Data From The Trial

    Sensors Manual).  Stop each Pegasus-I logging by pressing the button: no LEDs should be lit.  Remove the silk.  Retrieve Pegasus-S from the pocket and switch it off.
  • Page 18 In the top right hand of the window you will see the button Create Folder. Click on this and the list of folders will drop down and a blue band will appear with the following text in it ‘Type name of new folder’, see below. Page 18 of 31...
  • Page 19 You press the enter key on the keyboard, or click in the blue area next to the Saracen folder name on the right. This is the strange part of the process which is out of ETB’s control, it is the operating system. You will soon get use to this.

  • Page 20: Retrieving And Analysing Data From The Trial With Gps Speed Data

    10.1. Retrieving and analysing data from the trial with GPS speed data:  Connect the four Pegasus-I units (the order in which the Pegasus-I units are placed in the recessed foam within the case does not matter).  Connect the Pegasus-S and switch on.

  • Page 21: Retrieving And Analysing Data From The Trial Without Gps Data

    10.2. Retrieving and analysing data from the trial without GPS data:  Connect the four Pegasus-I units (the order in which the Pegasus-I units are placed in the recessed foam within the case does not matter).  Click on Analyse Gait. A progress bar is then displayed, together with information as to the current stage in the process which may take several minutes, depending upon the duration of the trial.

  • Page 22: Presenting The Results

    11. Presenting the results The following results presentation facilities are provided:  Statistical data in tabular form for all of the trial and any sections of the trial that you have chosen.  Graphical presentation of the data with options as to what is displayed. ...
  • Page 23 The plot of the trial is then shown with the stride duration, below which is a GPS position plot. You have a number of options that can be selected along the top of the window:  Quit, Save, Numbers, Report, Scan, Re-class And further options on the left side;...
  • Page 24 Export: enables you to include in your report as many plots of different sections from the charts as you wish. These files are stored with a .png extension. When selected, you will be asked to give the plot a name and identify the destination directory. Give the plot a title that means something, for example “1 trot in warm up”: this will be saved with the plot.
  • Page 25 The screen shows the ‘Region Navigator’ on the left where there are three buttons; New, Delete and Publish. The Region labelled ‘All’ is highlighted and the data pertaining to the trial is detailed in the table shown on the right. Note: any white regions were the automatic gait classifier does not understand the gait information are not included in the summary table.
  • Page 26 To display your selected regions just click on the name you have given it within the ‘Region Navigator’. The display shows the region that you selected. You can zoom in on any section within the zoomed section. If you want to keep that plot and the data click on Publish. It will then store this data for the report.

  • Page 27: Saving The Data

    11.3. Saving the data: Click on Save (top of screen). This saves the results as a .csv (comma separated variable) file which can then be reviewed at a later date or exported into other packages for a more alternative analysis. Note: Once you exit the Poseidon programme you will not be able to add any other sections of data.

  • Page 28: Reviewing Previous Results

    USB connector. The micro cards are very small, easy to mishandle and fiddly to remove and put back into the Pegasus-I. If the card reader option is chosen, the files on the micro SD card will be displayed.

  • Page 29: Obtaining The Results From Saved Data

    In the dialogue which opens, confirm with Yes and the micro SD card will be reformatted. When finished select Done. Repeat the above for each of the four Pegasus-I units in turn. You should then have a number of directories, each with four Pegasus-I data files. Note, down loading using this method the files do not have the prefix of LF, LH, RF or RH.

  • Page 30: Obtaining Data From A Trial With Gps Speed Data

    15. Using a new memory card in Pegasus-I: You are encouraged to use only the card supplied with your Pegasus-I. If you wish, or it becomes necessary, to use a new card, it must be specially formatted for use in Pegasus-I.

  • Page 31: To Get Help From Etb

    Particularly helpful are screen plots copied into a document to show where things appear to be going wrong. Sensor serial number, Pegasus firmware issue and Poseidon software version may also be useful.

This manual is also suitable for:

Pegasus-iPegasus-s

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