The ‘ABNT 10312 Coastdown’ test is a plugin for the VBOX Test Suite software.
The test itself allows the user to complete and analyse a coastdown test to the latest ABNT 10312 Coastdown protocol.
The ABNT 10312 Coastdown test has a tailored 'Test Setup' ribbon bar, from which the test and test area can be configured.
Note: Ribbon bar icons may move/ resize dependent on the Software window size.
The 'Configure' button displays a pop up window whereby the parameters of the test can be defined.
The 'Report' button creates a report from the current test results. This button is only available when a run has been selected from the test results window.
Allows the user to create unique maths channels. For more information on maths channels, please see the ‘Maths Channels’ section.
The 'Save Settings' button will save this individual test setup and will appear in the ‘Saved Settings’ area of the ‘Add Test’ window.
This test will also be added to the list of ABNT 10312 Coastdown tests under the 'Coastdown' icon on the 'Home' tab for easy switching of the current test.
The 'Export' button displays a drop down menu which allows the user to export either the selected results or line results to either a .csv or .txt file. It is also possible to export the data to a .vbo file for later analysis without the need to take the file from the VBOX's compact flash card. This can also be accessed by using the keyboard shortcut 'Ctrl+E'.
Add Gate (space)
Pressing the ‘Add Gate’ button will add a virtual gate to the chart and map area at the point of the cursor, indicated by green coloured lines. The currently selected gate is indicated by a dark blue coloured line. Once a gate has been added, the gate width can be specified. A gate can also be added by using the keyboard space button.
IMPORTANT - When adding a gate, the vehicle must be travelling greater than 0.8 km/h in order to ascertain the heading of the gate.
Allows the user to rename the currently selected gate line (start/finish, end of bath, etc.).
Deletes the currently selected gate.
Allows the user to either export the created gate(s) as a .spl file for reusing at a later date or using with another VBOX product, or import a previously saved or provided .spl gates file. When imported, gates will be added in the order in which they were saved within the .spl file.
The 'Add' button adds a column to the test results area. Selecting this button will bring up a drop down window where the user can select a channel to display in the test results window.
Sort Ascending/Sort Descending
The 'Sort Ascending/Descending Buttons' will sort the values based on the currently selected column in the results area.
Select All (Ctrl+A)
The 'Select All' button allows the user to tick every run in the results area at once. This can also be accessed by using the keyboard shortcut 'Ctrl+A'.
Deselect All (Ctrl+E)
The 'Deselect All' button allows the user to de select every run in the results area at once. This can also be accessed by using the keyboard shortcut 'Ctrl+E'.
The 'Edit Data' button allows the user to enter session specific data such as driver name, track facility and weather data.
Pressing this 'Help' button will automatically open an internet browsing window and load the relevant section of the Racelogic Support Centre. This page will only be displayed if there is a valid internet connection. If there is no valid internet connection, a cached version of the relevant section (from the last software update) will be presented in PDF form. This can also be accessed by using the keyboard shortcut 'F1'.
Selecting the 'Configure' button will display a pop up window where the user can define the parameters of the test. These include the start and end conditions, as well as the pass conditions.
Use the up and down buttons to the right of the parameters to Expand and Collapse the parameter headings.
Speed Range Configuration
Start/ End Speed
This parameter denotes the speed at which the test will start and end.
To perform a ‘Split Run’ whereby the coastdown test is split into different speed ranges, the user can press the ‘+’ button to add a new speed range.
This allows the user to specify the ∆v speed interval that each run will be broken down into (cannot be 0 km/h).
To stop the software reading false coastdowns (i.e. braking into a turn around point), the user can select the ‘Requires Trigger’ option. When this option is ticked, the software will not record a coastdown result unless the trigger is active. Releasing the trigger at any time during a coastdown will invalidate that run.
To stop incorrect coastdown runs (for example braking into a corner) being included in the accuracy calculations, there is an option to highlight runs that have had a longitudinal acceleration greater than a specified value.
This option allows the user to enter criteria that will quickly identify whether there has been a ‘Speed Jump’ during the coastdown run. If selected, a PASS/FAIL column for the speed quality appears in the Results Table to indicate if the criteria has been met after each run. A gauge is also available for selection on the Dashboard.
VBOX Test Suite allows the user to specify a channel that can be used to easily identify if certain parameters have exceeded a set threshold, and as such will highlight the run red to mark it as ‘Failed’. The pass conditions can be set so that the run fails whenever the threshold is exceeded, either at the start of the test, at the end of the test, anytime during the test or averaged during the test.
To do this, the user must select a channel from the drop down list and specify a low and high threshold value. More channels can be added by selecting the ‘+’ button.
Completing a Test
To start an online test, the user must first select the correct COM port from the ‘Online’ drop down menu in home tab. Once connected to a VBOX, the dashboard will change to show the 'START', 'STOP' and 'RESET' buttons.
Starting, Stopping and Resetting a Test
By pressing the 'START' button, the software will add a tab to the Test Results area ready to be populated with results once the start and end criteria have been met. The 'START' button will also change to a 'PAUSE' button, allowing the user to pause the test. To resume the test, simply press the 'RESUME' button.
To finish a test, simply press the 'STOP' button. This will stop all open tests. Once the stop button has be pressed, future results cannot be added to that results tab. Pressing the 'START' button will open up a new results tab, however once the stop button has been pressed, the user will be required to calibrate the wheel speeds again (if wheel speed channel(s) are selected) before a new test can be started.
If, for any reason, a mistake has been made during the test, it is possible to restart the test by pressing the 'RESET' button and again this will require a calibration of the wheel speeds.
Calibrating the Wheel Speeds
To allow for different wheel diameters to be easily and consistently used in the test, the software has an auto calibrate function that automatically applies a scaling factor to the CAN Wheel Speeds to match the GPS Speed. This process is only required when a wheel speed channel(s) has been specified in the 'Test Configuration' menu.
When the user first presses the 'START' button, a dialogue window will appear that contains the calibration instructions.
To successfully calibrate the wheel speeds, the user must drive at constant speed of 20 km/h (+/- 2 km/h) for 5 seconds, ensuring not to rapidly accelerate, decelerate or any other manoeuvre that may induce wheel slip. Once this period has been completed, the software will display a ‘Calibrated’ message and the test is able to be started.
Once calibrated, the user will be able to show and analyse both a calibrated wheel speed and a Wheel Slip %.
IMPORTANT - The calibration period is also required when in ‘Offline’ mode, so it is extremely important that the unit is logging before the calibration procedure is carried out, otherwise the software will not produce any test results.
Test Results Area
The test results area is the area that displays all of the results from the current test. Within this area it is possible to include/exclude results from the chart area, display the average/max/min values and also easily identify any runs which have not met the pass criteria.
Every time a new test is started (via the 'START' button on the dashboard), or a new file is loaded, a new tab will be added to the test results area, allowing the user to switch between separate tests or files and compare runs from each. A session can be removed from the results area by pressing the ‘x’ icon on the tab.
It is possible to rename the session tab by double clicking on the tab header. Changing the session tab within the software will automatically change the name of the locally saved .vbo file.
By pressing the 'Edit Data' button next to the name of the file/run or in the ‘Test Setup' ribbon bar, a new window will be displayed whereby the user can add various different pieces of vehicle and test information, such as:-
- Vehicle Model
- Driver Name
- Effective Weight
- Tyre ID No
- Tyre Make
- Tyre Dimensions
- Tyre Model
- Tyre Pressures
- Test Date
- Time Zone
- Test Track
- Test Facility
- Atmospheric Pressure
- Wind Speed
When in 'Offline' mode, this information will be saved into the .vbo file meaning that this information will be recalled every time the file is loaded into VBOX Test Suite.
When in 'Online' mode, a newly-created session will be populated with session data from the previous session.
This information will be included in the test report to allow the user to understand under what conditions the test was conducted.
Note: This data is purely optional and has no effect on the test or test result.
To save time, it is possible for the user to import and export the session information for use in other sessions (the entire range of data is exported not just the visible screen).
Once the session information has been completed, it is possible to export the data to a .vbses file. This file will contain all the session information that can then be imported into the open session information field.
Along the top of the Test results area are some default columns. These columns are:-
- Run – Indicates which run number the results relate to, with run one being the first run completed and the direction of travel of the run. There is also a selection box that, when ticked, includes that run in the graph and into the Average/Max/Min/Standard Deviation calculations. Once selected, a coloured square will appear to indicate which colour this run is displayed as on the graph.
Note: If you are loading a file offline, all valid runs are ticked automatically.
- Time – The total time the run has taken.
- Distance – The total distance travelled in that run.
- Start Time – The UTC time at which the test started.
- Max Decel – The maximum absolute value of longitudinal deceleration between the start of test and end of test. If the Maximum Deceleration parameter is exceeded, this column will be highlighted deep red and the whole run will be highlighted light red.
- Speed Quality (if speed quality check has been ticked) – A PASS/FAIL indication of whether the Speed Quality criteria has been met. If failed, this column will be highlighted deep red and the whole run will be highlighted light red.
Above the results area is a live calculated value of CVf’0 and CVf’2. For these values to be calculated, the user MUST enter an effective weight into the session data.
Adding a Column
It is possible to add columns to the test results area by selecting the ‘Add’ button on the ‘Test Setup' tab in the ribbon bar. Selecting this button will display a drop down list of all available channels which the user can select to display as a results column. By default, this value is displayed as an ‘At End’ value, whereby the column will display the value of that parameter at the end of the run.
It is also possible to right click anywhere in the test results area and select the ‘Add’ option from the dropdown menu.
To remove a column, simply select the ‘x’ icon that appears when you hover over the column title. If a column has been removed, it can be added again by selecting the ‘Add’ button and choosing the desired channel.
It is possible to filter results by right clicking on a value within the cell results table (e.g. Time (s)). You can then choose to include only results with a value equal to the selected value or that have a value that is <= than or >= than the selected value for that channel. Multiple channels can be filtered, a notification bar above the results shows which filters are applied. To remove the filters, click on the 'x' within this bar.
Copying Cells (Ctrl+C), Rows or Columns
Individual results cells can be copied so that they can be pasted into another piece of software. To copy a cell, select the required cell, right click and then select ‘Copy’ or use the keyboard shortcut 'Ctrl+C'. To select multiple cells, either left click with the mouse and drag or hold down the 'Ctrl' when selecting. To select all cells between 2 cells, hold down the 'Shift' key when selecting.
It is also possible to copy an individual row, column or the entire results table. This is achieved by right clicking the required row or column and selecting ‘Copy Row’, ‘Copy column’ or ‘Copy all’.
Renaming a Column (F2)
To rename a column, you can either Double Click on the column title, right click the required column and select ‘Rename Column’ or use the keyboard shortcut 'F2' whilst the column is highlighted. Renamed columns will be included within an exported file and a generated report.
Right clicking anywhere in the test results area and selecting the ‘Export’ option from the dropdown menu will replicate the function of 'Export' within the Ribbon Bar.
Average/Max/Min/Standard Deviation Values
It is possible for the software to automatically calculate the Average/Max/Min/Standard Deviation values of all relevant runs by ticking the selection box next to the relevant run number.
Once more than one result has been selected, the average, maximum and minimum values will be displayed, and once more than two results have been selected, the standard deviation of the selected runs will be also be displayed.
Selecting the tick box next to the ‘Avg’ line will add a moving average ‘best fit’ curve to all of the selected runs.
Along with the usual dashboard functionality, the ‘ABNT 10312 Coastdown’ test has some extra options that can be displayed to the user.
By selecting the 'Add Gauge' button from the dashboard tab, a drop down menu will appear whereby the user can select 'Test' and then the desired parameter to be displayed. On selection, a gauge will be automatically added to the dashboard. Any gauges displaying a result of a test, such as an average or maximum value, will have a 'Result' icon to the left of the gauge name to indicate that it is either a result of the previous run if viewing live data, or the currently selected run if viewing a saved file.
All Result Column parameters are also available as a gauge.
Showing Test Results on the Dashboard
It is possible to display certain parameters from the current test on the dashboard. The current speed range, the current CVf’0 and CVf’2 value, the current total run number and the individual number of runs in each speed range can all be displayed on the dashboard.
It is also possible to show the current run number on the dashboard to give an easy, clear indication of the amount of runs completed. An 'OK Runs' gauge can be added to indicate how many runs have met any specified pass conditions.
A 'Speed Quality' gauge is available for use when conducting live testing to show the status of the last completed run with regards to the Speed Quality criteria. It will display as a green 'PASS' when the last run has met the criteria and a red 'FAIL' when the criteria has been exceeded.
A 'Run Status' gauge is available for use when conducting live testing to show the status of the last completed run with regards to the Pass Conditions. It will display as a green 'PASS' when the last run has met all Pass Conditions and a red 'FAIL' when any of the Pass Conditions limits have been exceeded.
Distance/Time Since Run
The user can also add gauges to the dashboard that show a live value of either time or distance since the completion of the last run.
Creating a Report
VBOX Test Suite allows the user to turn the results table into a custom report whereby the user can easily compare and display the results from their coastdown test.
This report will include all of the previously entered session data, along with a table of results that show the coastdown times in each direction. The average coastdown times for each speed interval will then be displayed for both direction 1 and direction 2.
If the user manually deselects a valid run, this will be displayed in the report as ‘Off’ under the ‘Run-Use’ column.
The user can then choose to print or save this report. A sample of this report* can be seen below:-
* The data here is simulated data and is in no way a reflection of the indicated manufacturer's brake stop ability.