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PI & Tangents
To calculate the curve parameters when two tangents and the point of their intersection are given:
Click to show / hide the illustration of curve parameters used in MAGNET Field
- In the Input tab, specify two tangents directions and the point of intersection:
- Specify the PI Point (point of intersection of the tangents). Enter a point name manually, or select from the map
or from the list
of job points.
- In Az PI to PC (Brg PI to PC if bearing is selected to output directions), enter the direction from the PI point to the PC point (point of curve, the start point of the curve).
- In Az PI to PT (Brg PI to PT if bearing is selected to output directions), enter the direction from the PI point to the PT point (point of tangent, the end point of the curve).
- Select one of the curvature parameters Radius / Chord Angle / Curve Angle / Tangent and enter the value.
- The coordinates of the PC Point (point of curve), PT Point (point of tangent), RP Point (radius point) will be calculated based on specified curve parameters. You can manually change an automatically offered point name. Select the code for this calculated point from the existing codes and, if required, click
to set the point's attributes. More....
- Click the Calc button
to calculate the curve parameters.
- In the Results tab, review the results of the calculation and click
to save the
data to *.txt file, if required:
- PC point, PT point and RP point are the names of the respective calculated points. To add calculated points to the job, ensure the check boxes near all desired points are checked
, then click
.
- Coordinates of calculated points: PC point, PT point and RP point.
- Radius of the curve.
- Length of the curve.
- Chord is the distance between the start and end points (tangent points) of the curve.
- Curve angle defines the angle in degrees which is used to compute the radius of curve with the length of 100 units.
- Chord angle defines the angle in degrees which is used to compute the radius of curve whose chord is 100 units long.
- Delta is the internal angle from center to tangent points.
- Tangent is the distance between the point of intersection of the tangents at the starting and ending points, and the ending point.
- External is the shortest distance between the point of intersection and the curve (along the line joining the point of intersection to the radius point).
- Mid Ord is the length of the line segment between the curve and the chord on the line joining the point of intersection to the radius point.
- Segment is the area of a circle bounded by a chord and the circular curve that it cuts off.
- Sector is the area of a circle bounded by two radii and the circular curve they determine.
- Fillet is the area between the circular curve and the two tangents at the start and end points of the curve.
- The Map tab shows the job's objects with the illustration for the results and supports generation of a field report with the results of calculation (use the Create Field Report command from the context menu).
- The Drawing tab shows the illustration for the results and supports generation of a field report with the results of calculation (use the Create Field Report command from the context menu).
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