Fillings Detection

Fillings Detection

Attention!
In order to detect fillings the processed data is used (it is done on 'Data preparation' and 'Filtration' steps).

Note: Ellipsis (…) substitutes 'Unit properties → Fuel consumption' is option paths.



Three options are attached to this detection:

  • Option: Minimum fuel filling volume, liters;
  • Option: Detect fuel filling only while stopped;
  • Option: Ignore filtration when calculating filling volume;
  • Special Case: How a filling is processed?

Minimum fuel filling volume

... → 'Fuel fillings/thefts detection' block → 'Minimum fuel filling volume, liters'

This option helps to quit false fillings, because in motion sensors may send false data rise.

Detect fuel filling only while stopped

... → 'Fuel fillings/thefts detection' block → 'Detect fuel filling only while stopped'

In normal conditions transport vehicles are fueled on stops. This option narrows its search to stops/parkings.

Calculate fuel filling volume by raw data

... → 'Fuel Fillings/Thefts Detection' block → 'Calculate fuel filling volume by raw data'

When filtration switched on then some fuel level deviations may occur at the beginning and end of a filling. To avoid it the system uses unfiltered data when filling volume calculated.

Special Case: How a filling is processed?


Filling time frontiers and its volume

The filling is processing.
Assume, that fuel volume in this message is Vcurr, previous message fuel volume — Vprev. If the difference d (=Vcurr - Vprev) for the current message is positive, then current message will be marked as initial filling message.
Time passes by. The filling is close to finish. When d-value for some message becomes negative (i.e., the current message fuel volume is less than in previous one), then it is called final filling message. If the fuel level doesn't change during the time indicated in the 'Timeout to separate consecutive fillings' parameter on the 'Fuel Consumption' tab of the unit's properties, the filling will be considered finished as well.

Filling volume equals to Vfinal - Vinit (difference in fuel volumes between final and initial filling messages).

Filling timestamp calculation algorithm

Now it's time to find the filling timestamp.
Iteratively for every message within filling interval (exclude the last one) the system seeks delta(=Vnext - Vcurr) for the next message which shows the fuel level growth between the current message and the next one.
Message timestamp which delta is the ultimately biggest among others is regarded as filling timestamp (in other words, the left message is chosen from the message pair which delta is the biggest one).
Worth highlighting, that a filling timestamp is calculated dynamically depend on the current unique case.

Determining fuel fillings in the 'Fuel traffic' table

The Fuel Traffic table determines the fuel activity of the unit (fuel filling, theft, counter operation), according to which the report is being executed, as well as the units that were near it. The following algorithm explains what principle the system uses to determine to which of the nearby units fuel was distributed.

The intervals for the distribution and reception of fuel are considered to be adjacent if the time of the fuel filling of the unit that receives fuel has fallen into the interval of operation of the counter of the unit that distributed it (see the diagram).

If there was no such match, the algorithm searches for the intersection of the entire fuel filling interval of the unit that received the fuel, with the intervals of the counter of the unit that distributed it and selects the first one (see the diagram).


    • Related Articles

    • Thefts Detection

      Attention! In order to detect thefts the processed data is used (it is done on 'Data preparation' and 'Filtration' steps). Note: Ellipsis (…) substitutes 'Unit properties → Fuel consumption' is option paths. The next options are crucial while ...

    • Fuel Fillings

      This report shows where and when a vehicle was filled up. The parameters for the report are set in Unit Properties => Fuel Consumption. This report is generated on the basis of fillings registered manually or detected by sensors. The table cannot be ...

    • Trip Detection

      Required access: View detailed properties — to view this tab; Edit trip detector and fuel consumption — to edit this tab. The trip detector is configured in the Unit Properties dialog and is used to detect movement intervals (trips) and idles (stops, ...

    • False Thefts or Fillings

      When the tracker is cut off power, FLS sends zero values. As a result, false fuel fillings and thefts appear in reports. How to avoid that? If FLS does not provide data for some reason, the tracker may send zeroes instead. Those zeroes will be ...

    • Fuel

      All the sensor workflow can be divided into sequential steps (there are important options, terms in step subsections): Data preparation Option: Ignore the messages after the start of motion; Term difference: 'Mileage-based calculation' VS 'Time-based ...