R117 Pass-By Noise

Test

Gate

  

Start On

When the Laser Light Barrier is used, the channel 'Trigger' should be selected in the dropdown menu.

Note: If a trigger is used as the start condition, the test will ignore any other trigger activations during the duration of the test.

Start Line Offset (m)

Allows the user to set the distance between the reflective strip and the Start Line AA’ of the Test Area. As a recommendation, the reflective strip should be located at a distance of 30 m from the Start Line.

Allow Single Direction Testing

Selecting this option will allow the test to be run in a single direction.

Channels

Allows the user to specify the channels to be used for the Microphones. The Microphone 1 channel is mandatory before the test can be run.

Air Temperature

Allows the user to specify the channel to be used for the Air Temperature channel only when using a weather station otherwise it can be left blank. If a channel is selected, a pass/fail column for temperature appears in the results table to ensure during each test run that the ambient air temperature is within the specified range. The default values are 5°C to 40°C.

Test Surface Temperature

Allows the user to specify the channel to be used for the Test Surface temperature channel only when using a temperature sensor otherwise it can be left blank. If a channel is selected, a pass/fail column for temperature appears in the results table to ensure during each test run that the ambient air temperature is within the specified range. The default values are 5°C to 50°C.

Wind Speed

Allows the user to specify the channel to be used for the Wind Speed if using a weather station, otherwise it can be left blank. If a channel is selected, a pass/fail column for wind speed appears in the results table to ensure during each test run that the wind speed, including gusts, at microphone height doesn't exceed the maximum threshold. The default maximum is 5 m/s.

Noise Threshold

Allows the user to specify the maximum sound levels that the test results must not exceed during the test.

GPS Start Lines

An alternative method to using the light barrier kit is for customers with an RTK enabled VBOX 3i to set up start lines, either while online to the VBOX or from a previously logged file. The Start line names can be renamed or deleted as required.

Test Configuration with GPS Start Lines

Once the start lines have been created, Racelogic recommend the saving of test settings. This will allow the user to repeatedly recall these start lines without having to set them individually for each test.
 

Since the test can be conducted in both directions, test settings can be modified such that the start on lines can be configured for 1 or 2 lines in the drop down menu.

In order to prevent situations where the start line offset is less than the vehicle front offset to the antenna, the minimum value of the start line offset is 5 m. The default value of the start line offset is 30 m.

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 been pressed, future results cannot be added to that results tab. Pressing the 'START' button will open up a new results tab.

If, for any reason, a mistake has been made during the test, it is possible to restart the test by pressing the 'RESET' button.

Refresh Channel Names

When conducting Pass-By Noise testing it is recommended to turn off Refresh Channel Names, meaning that VBOX Test Suite will store the channel names from the last online session. When connected, any CAN channels from modules that are no longer connected will be included as unnamed channels. If the number of CAN channels in the serial stream for the new VBOX connection matches the number of CAN channels in the last online session, you will be prompted to set the channel names from the last connection.

This is useful where you would like to view the channels from the mini input module (which was previously connected to a VB3i for configuration and connected online within VBOX Test Suite) that is connected to a sound level meter roadside and communicating with the VB3i via radio.

Session Data

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
  • Vehicle Model
  • Vehicle Number
  • Driver Name
  • Engine Model
  • Engine Number
  • Kerb Mass
  • Power
• Measurements
  • Enter the front and rear vehicle offsets from the laser light trigger, or GNSS antenna if using GPS start/finish lines (required). The start of the test is deemed to be when the front of the vehicle passes the start line and the end is when the rear of the vehicle passes the finish line.
    
• Wheels/Tyres
  • Wheel Dimensions
  • Tyre Make
  • Tyre Dimensions
  • Tyre Model
  • Tyre Pressures 
  • Tyre Class - This decides which speed the test should be conducted at as well as temperature coefficient, C1 by default (although this parameter is located within the 'Front Tyres/Wheels’ area, it applies to all wheels under tests, including the rear wheels)
• Test
  • Test Date
  • Test Track
  • Test Facility
  • Comments
• Conditions
  • Weather
  • Temperature
  • Track Temperature
  • Humidity
  • Wind Speed
  • Background Noise
     

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 which result applies to which test.
 

To save time, it is possible for the user to import and export the session information for use in other sessions.

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.

Notes:

• The Vehicle Offsets Measurements are mandatory.
• Tyre Class also affects the outcome of the test, if changed, the results and report information will be updated.
• The other data is purely optional and has no effect on the test or test result.
   

Before starting a test, please ensure that Vehicle Offset Measurements are entered or imported from a previously saved .vbses file.

Result Columns

 

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. 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. ​​​​​​​
• Direction – Indicates which direction the run was being completed in.
• Time – Time taken to traverse between start line AA’ and finish line BB’.
• Speed at Start – Speed value at the start line AA’. The Test Speed Range is dependent on the tyre class chosen within the Session Data; 70–90 km/h for C1 and C2, 60–80 km/h for C3. If the speed at start is not within this range, the table cell will be highlighted red.
• Mic Speed – Speed value at the microphone line PP’. The Test Speed Range is dependent on the tyre class chosen within the Session Data; 70–90 km/h for C1 and C2, 60–80 km/h for C3. If mic speed is not within this range, the table cell will be highlighted red.
• Speed at End – Speed value at the finish line BB’. The Test Speed Range is dependent on the tyre class chosen within the Session Data; 70–90 km/h for C1 and C2, 60–80 km/h for C3. If the speed at end is not within this range, the table cell will be highlighted red.
• Pass? – Whether the run has passed or failed according to the defined Noise Threshold.
• Mic1 Max – Maximum Sound Level value of Mic1.
• Mic2 Max – Maximum Sound Level value of Mic2.
• Air Temp – Air Temperature at the microphone line PP’ during test.
• Surface Temp – Surface Temperature at the microphone line PP’ during test.
• Wind Speed Max – Maximum Wind Speed during test.