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Inclination Measurement
Version: 1.24
Date: 1825.1104.20212022
1 Introduction
2 System requirements
2.1 Hardware
2.2 Software
3 Inclination Measurement
4 Displaying Inclination Curve(s)
5 Settings inside the Inclination Panel
6 Entering Manhole Altitudes
7 Printing inclination data
7.1 Printing inclination data based on VAV-P50/SW-P91
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There are 4 different cases that WinCanVX has to take into account in order to have the values drawn correctly.
Inspection direction = downstreams -> Measurement = Forward -> camera driving downwards and producing NEGATIVE values
Inspection direction = downstreams -> Measurement = Backward -> camera driving upwards in backward direction and producing NEGATIVE values
Inspection direction = upstreams -> Measurement = Forward -> camera driving upwards and producing POSITIVE values
Inspection direction = upstreams -> Measurement = Backward –> camera driving downwards in backward direction and producing POSITIVE values
The operator thus does not need to worry about the start point of the measurement: The inclination curve for a gravity sewer will always be descending from left to right.
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Select the section whose inclination has already been measured and hit the command button Extended Modules > Inclination. This is going to display the corresponding inclination diagram:
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Inclination curve showing the %-values recorded by the camera sensor directly. Small peaks changing abruptly (1a) display vertical jerky movements of the crawler due to unevenesses of the pipe sole (joints, holes, cracks, etc.).
Line zero: Positive values are lying above this line and show the profile curve (3) ascending at a specific position. Negative values are lying beneath this line and show the profile curve (3) descending at a specific position.
Average inclination profile curve calculated from the %-values transmitted by the camera sensor (1).
Straight link between the position of the START manhole and the position of the END manhole. The distance between the two parallel lines depend on the value put in the field Diameter (OBJ_Size1).
Height of the start manhole put automatically to zero.
Settings inside the Inclination Panel
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The option Display inclination curve additionally shows the graph based on the original values obtained from the inclinometer.
The option Smooth inclination removes the highest peaks referring to extreme inclinometer values that are only due to jerky crawler movements during the measurement procedure.
The option Show Gridlines hides or un-hides the gridlines based on the scale units applied for the horizontal and vertical axis.The option Invert distance turns the horizontal scale to 180°. So the start point 0.00 will be located on the right and the end point on the left side.
3.) Hit this button if you want to save the current inclination graph as a picture file.
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The right part of the inclination panel contains options to control the printing of the node altitudes and the tolerance bars which are mandatory for Swedish projects.
The tab Settings shows the altitude difference measured in relation to the section length. In most cases the accurate altitude values (m/ft above sea level) for the upstream and downstream manholes are unknown.
WinCanVX thus sets the altitude of the upstream manhole automatically to 0.00:
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If the user has entered values into the section fields OBJ_FromNodeInvert and OBJ_ToNodeInvert they will be shown in the text fields Altitude [ft]/[m] (5).
The tab calculation method allows the user to print the inclination graph either with or without tolerance bars. The calculation of these bars is based on the definitions of the specific standard VAV-P50/SW-P91, which must be applied in Sweden.
In all other countries the user can activate the option WinCan to get the inclination graph printed.
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The tab inclination graph provides options the user can activate in case he wants to customize the value intervals for the corresponding scales of the inclination graph:
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Entering Manhole Altitudes
Some country standards require the entry of the manhole altitudes and the output of these altitude values on the inclination graph.
The following sketch shows the meaning of the fields OBJ_FromNodeInvert and OBJ_ToNodeInvert that must both be available in the section input mask for each template in order to have the slope of the pipe represented exactly as in reality.
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Legend:
Field: | Parameter: |
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V_OBJ_Shape-WKT_Z: | Altitude [m/ft] of the manhole cover above sea level |
OBJ_FromNodeDepth: | Distance [m/ft] between the upstream manhole cover and the pipe outlet |
OBJ_FromNodeInvert: | Altitude [m/ft] of the pipe outlet above sea level |
OBJ_ToNodeDepth: | Distance [m/ft] between the downstream manhole cover and the pipe inlet |
OBJ_ToNodeInvert: | Altitude [m/ft] of the pipe inlet above sea level |
Printing inclination data
The inclination graph finally can be printed together with the inspection report. Hit the tab command Printing > Printing Panel to open the printing dialogue and select the inspection as well as the inclination report.
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Make sure you have checked the section inclination report and that the options highlighted above are enabled or disabled accordingly.
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