1、 mileage using GPS calculation instructions
1.1 Whether the mileage is calculated by GPS
- The first GPS mileage is 0
- The first valid GPS mileage is 0
When the GPS mileage calculation conditions are not met, it means that the reported mileage of the equipment is valid, and the mileage of the equipment is directly calculated, and the data will not be checked for drift.
1.2 The judgment condition of drift point in GPS calculation (any one)
1.GPS is invalid
2.GPS mileage is less than the previous valid GPS mileage
3. The speed calculated by mileage is greater than or equal to 160 km/h
GPS Sort by Time
Drift point mileage using previous valid GPS data
The following figure
Serial number 678, mileage should be calculated by 675=128540.3-128539.6+29.5=30.2
2, fuel consumption increase or decrease using GPS calculation instructions
2.1 Judgment of Oil Quantity Equipment of Double Equipment
Equipment Fuel Quantity Transducer Configuration> The Equipment is Configured with Analytical GPS> Using the First Equipment
2.2 Filter Oil Quantity GPS Data Oil Quantity Accumulation Upload Judgment (Oil Quantity Increases All the Time, Normal Upload Is Oil Quantity Continuously Decreases)
- Obtain the GPS of the oil quantity equipment and filter out the GPS data with the oil quantity data of 0
- Determine whether the oil quantity is the accumulated value uploaded by the equipment
Judgment Formula
Increase number = the number of the fuel value of the next GPS is greater than the fuel value of the previous GPS
Equal number = the fuel value of the next GPS is equal to the number of the fuel value of the previous GPS
Number of checks = (total number of GPS data of fuel quantity- equal number) * 4/5;
(0 != increase number) AND (0 != check number) AND (increase number> = check number)
2.3 the calculation of starting oil quantity, ending oil quantity, refueling and stealing oil (calculated by filtered GPS)
Starting oil quantity = first GPS oil quantity
End Fuel Quantity = Last GPS Fuel Quantity
1. Accumulate and upload the oil value (the oil value has been increasing normally)
The fuel consumption is calculated by accumulating the fuel consumption between two GPS, which is the same as the accumulated mileage reported by the calculation device.
Fuel consumption = (the next fuel value> the previous fuel value) ? (the next fuel value- the previous fuel value) : 0;
Do not calculate refueling and stealing oil
2. Upload the current fuel value (usually upload by this method)
(1) Calculate the oil volume data after sampling for 1 minute and store up to 3 values in the list, and calculate the following data
Average Oil Quantity List LISTAVE = Tied Value of Oil Quantity Sampled for 1 Minute
Minimum oil quantity list LISTMIN = minimum value of mail quantity sampled in 1 minute
Maximum oil quantity list LISTMAX = maximum postal quantity sampled in 1 minute
(2) The calculation of refueling and stealing oil shall be started after sampling for the last 3 times.
Judgment threshold = alarm threshold/5;
Sampling maximum value = maximum value inside the LISTMAX
Sampling minimum value = minimum value inside the LISTMIN
Difference holding value = oil value for the second (III) of sampling- oil value for the first time of sampling
Determine the difference between the continuous data of the LISTAVE.
Refueling (fuel reduction) status = difference holding value is positive (negative number takes absolute value) is greater than judgment threshold (sampling maximum value- sampling minimum value)> alarm threshold
Others are normal (refueling (fuel reduction) state ends),
The start GPS of refueling is the GPS of the minimum sampling value, and the end GPS is the GPS of the maximum sampling value
The start GPS of fuel reduction is the GPS with the maximum sampling value, and the end GPS is the GPS with the minimum sampling value.
Fuel consumption = (starting fuel quantity)- if the end fuel quantity is negative, use mileage to calculate, default mileage (m)/50
