The ‘TKPH' test is a plugin for the VBOX Test Suite software.
This Application Guide will guide you through key inputs to achieve results in the TKPH Plugin. The plugin will output a report displaying operating site TKPH of the vehicle to be compared against rated TKPH of the tyres.
Once VBOX Test Suite is installed, ensure the USB Dongle supplied with the TKPH plugin is plugged into your computer. This is required to be plugged in whilst using the software.
The ribbon bar at the top of the window has a selection of large buttons, which fall under 4 main sections:
- Test Setup
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.
For your first test, click on the ‘Add’ button in the ribbon bar.
This will list the tests available under 'Categories'. Select the 'Mining' category, click 'New Test' and click 'OK'.
It may also be useful to add a certain test to your favourites by clicking on the star and ensuring that it is coloured in. This will ensure that the mining icon will be present in the ribbon bar when the USB dongle is plugged in.
When the Mining icon is present under the 'Home' tab in the ribbon bar, you can open a new or saved test by clicking on the icon and selecting from the dropdown.
To save a settings .vbts file to your documents, click on 'Save' near 'Set Options'. This settings file will save load/dump locations for easy loading onto any .vbo file.
Set Options - Units
To ensure you are calculating TKPH or TMPH depending on your region, open 'Set Options' under the 'Home' tab in the ribbon bar.
Here, you can choose between metric units (km/h, km, ºC, etc.) and imperial units (mph, mi, ºF, etc.).
If you select km/h, TKPH will be calculated and metric tons will be applied as payload units.
If you select mph, TMPH will be calculated and short tons will be applied as payload units.
Throughout the plugin, metric tonnes will be represented as 'tonnes' and short tons will be represented as 'tons'.
To save a settings file to be listed under the Mining dropdown menu, click on 'Save Settings' near 'Set Options'. This settings file will save load/dump locations for easy loading onto any .vbo file.
When you open a new test, you will be prompted to enter Test Configuration information. This can also be accessed by clicking the 'Configure' button under the 'Test Setup' tab in the ribbon bar.
Selecting the 'Configure' button will display a pop up window where the user can define the parameters of the test. To save a test configuration file (.vbts) to be stored in your files, click on 'Save Settings' near the 'Configure' button.
Set the average over which TKPH is calculated – often taken as 4 hour moving average.
Shift Start Times and Shift Max Temperatures
Set details for the start of day or night shift and the corresponding temperatures to apply during these periods.
You can set the information that is displayed on the final Report.
By pressing the 'Edit Data' button in the ‘Test Setup' ribbon bar, a new window will be displayed whereby the user can enter vehicle information to be stored against the .vbo file. There is functionality to Import and Export Session Data to load the same information to other .vbo files, such a vehicle, temperature and tyre information.
This section of Session Data allows you to enter vehicle information to be stored against the .vbo file, which will help to identify the vehicle when generating reports.
Below is the layout of the Report header:
- Vehicle ID – This is a descriptive text field which will be displayed as part of the heading on the Report.
- Vehicle Type – Defines the TKPH calculation based on vehicle type, and is mostly commonly set as Haul Truck.
- Vehicle Specification – This is a descriptive text field, which will be displayed as part of the heading on the Report.
- Fleet – This is a descriptive text field, which will be displayed as part of the heading on the Report.
- Time Zone – Here you can select the time zone of the region in which the data was gathered, so the Report and Results can display local time.
This section of Session Data allows you to define weight information to be stored against the .vbo file, which allows the plugin to calculate TKPH based on weight values for that particular vehicle.
This information can be imported by selecting the Import button and navigating to the relevant .vbses file in your files. A Vehicle Specification Library containing .vbses files for common mining vehicles is available on the VBOX Mining Solutions website.
Empty Vehicle Weight (tonnes)
Enter the value for empty vehicle weight, available in the manufacturer's vehicle specification. The units for this value depends on the units set in Set Options: tonnes refers to metric tonnes and tons refers to short tons.
Empty Weight Distribution
Enter the values for empty weight distribution, available in the manufacturer's vehicle specification. Ensure the two percentage values add to 100%.
Enter the value for payload, available in the manufacturer's vehicle specification. The units for this value depends on the units set in Set Options: tonnes refers to metric tonnes and tons refers to short tons.
Loaded Weight Distribution
Enter the values for loaded weight distribution, available in the manufacturer's vehicle specification. Ensure the two percentage values add to 100%.
Number of Wheels
Select the number of wheels on the front and rear axles to determine average tyre load from the information as entered above. The effective weight distribution should be simplified to two axles should the vehicle have more than two axles.
This section of Session Data allows you to overwrite default temperature data as entered in Test Configuration. This allows the plugin to set Ambient Temperature to predefined shift times and apply tyre manufacturer temperature corrections accordingly.
Day Shift (°C)
Enter the Ambient Temperature value during the day shift period as predefined in Test Configuration. The units for this value depends on the units set in Set Options: °C or °F.
Night Shift (°C)
Enter the Ambient Temperature value during the night shift period as predefined in Test Configuration. The units for this value depends on the units set in Set Options: °C or °F.
This section of Session Data allows you to save tyre information from tyre manufacturer data books and select certain tyres for analysis. This allows the plugin to apply tyre manufacturer TKPH corrections and display relevant information on the Report.
The software comes preloaded with common tyre specifications. There is also functionality to Add , Edit and Copy tyre specifications to expand on your database.
To compare site TKPH of the vehicle against selected tyre specification, ensure that the following is entered as a minimum:
- Tyre Size – Enter tyre size as per the standard tyre size naming convention (i.e. 46/90R57, 40.00R57, 40.00-57). Below you will see the respective section width, aspect ratio, tyre construction type and rim size being detected based upon the tyre size convention.
- Manufacturer – For tyre manufacturers that apply corrections (i.e. Bridgestone, Michelin, Yokohama), ensure that the manufacturer is chosen from the dropdown so the plugin can identify the tyre brand and apply corrections accordingly.
- TKPH, Tread Pattern, Compound / Spec – Enter this information as listed in the tyre manufacturer data books, available by clicking on the following links: Bridgestone, Goodyear, Michelin, Yokohama. TKPH must be a numeric value. According to 'Set Options', TKPH will be entered if km/h is set and TMPH will be entered if mph is set.
In 'Chart', you will see several mining-specific parameters when you click on Y-Axis. Note that the X-axis is displayed as elapsed time, whereas calculations are based on UTC time so the exact shape may not be reflected in the Report, which produces results against an X-axis of local time.
Cycle TKPH represents the TKPH value calculated for that cycle, from load point to the following dump point to the following load point. Front and Rear Cycle TKPH values can be represented on the Chart.
Moving avg. represents the rolling average of TKPH based on the interval set in Test Configuration (default set to 4 hour moving average). If no load/dump locations are defined, it will be assumed that half of the time is spent loaded and half of the time is spent unloaded. Front and Rear moving avg. values can be represented on the Chart.
On the Map, you can define load/dump locations by selecting 'Add Region'. This allows the software to detect whether a vehicle is loaded or unloaded based on regular movements.
Ensure that the region is placed correctly so as not to miss any areas in which load status may have changed. For instance, make sure all dump locations are captured as dump regions and all load points are captured as load regions. To reduce the chance of error, avoid load/dump regions at traffic hold points, such as intersections.
You can also rename load/dump locations as the relevant circuit will be represented in Results and the Report as “Load”-“Dump”-“Load”.
Creating a Report
VBOX Test Suite allows the user to create a report whereby the user can easily compare and display the results from their TKPH analysis.
You are able to generate a report by clicking the 'Report' button under the 'Test Setup' ribbon bar.
The user can then choose to print or save this report in Microsoft Word, Microsoft Excel or pdf formats. A sample of this report can be seen below:-
TKPH by Local Date and Time
This Report Chart displays operating vehicle TKPH to be compared against rated tyre TKPH. This Report Chart is completed for front TKPH only.
Displayed TKPH (i.e. Cycle, Moving Average, Manufacturer Corrections) can be adjusted in Test Configuration.
Displayed tyres can be adjusted in Session Data.
Cycle TKPH Frequency
This Report Chart displays the frequency of Cycle TKPH values to visualise the bulk of Cycle TKPH values and compare between circuits.
Summary by Circuit
This Report Table summarises key information for each circuit and the entire dataset. This is most useful to compare operations between multiple circuits.
Summary by Inputs
This Report Table summarises user input to help verify information used for the analysis.