Contents
How do you use a planimeter?
How does a mechanical planimeter work?
As the planimeter moves, the wheel partially rolls and partially slides. Motion of the segment in the direction of the vector N causes the wheel to roll, which is recorded on a scale attached to the wheel. The motion of the segment along its length causes the wheel to slide, and this motion is not recorded.26 mai 2009
What is a mechanical planimeter?
The polar planimeter is a mechanical device for measuring areas of regions in the plane which are bounded by smooth boundaries. The measurement is based directly on Green’s theorem in multi-variable calculus: the planimeter integrates a line integral of a vector field which has constant curl.9 déc. 2000
Where are the planimeter used in mechanical engineering works?
Planimeters are used by engineers, surveyors, contractors, designers, medical professionals, and more. The “closed loop” that we mentioned can be the outline of a storm pond, a tumor in a human organ, the outline of a odd-shaped swimming pool, or the area of leather in a shoe.
Is planimeter analog or digital?
The digital planimeter is an enhanced version of the classic planimeter which represents an analog system on which petroleum engineer calculates the areas concerned on the same principle ( Figure 2).
What are the two types of planimeter?
1. Linear planimeter.
2. Polar planimeter.
Which planimeter is more accurate?
The original polar planimeter was invented in 1854 by Jacob Amsler, a Swiss mathematician and inventor of many measuring instruments. It was so much simpler, easier to use, and more accurate than previously invented planimeters that the latter quickly became obsolete.2 jan. 2004
Which are the components of mechanical planimeter?
1. Tracing arm.
2. Tracing point.
3. Anchor arm.
4. Weight and needle point.
5. Clamp.
6. Hinge.
7. Tangent screw.
8. Index.
What is planimeter formula?
Explanation: By the use of planimeter, the area of the land can be measured which is used for processing. … Explanation: From the formula of area by planimeter, Δ = M (F-I±10N+C) the variable M represents multiplier constant which is required for further calculations.
How many types of planimeter is used?
five types
What is meant by zero circle?
The zero circle and circle of correction are defined as the circle round the circumference of which if the tracing point is moved, the wheel will simply side on the paper without any change in reading.
What is mechanical polar planimeter?
A polar planimeter is a mechanical device used to measure the area of a region by tracing the boundary of the region.25 fév. 2020
What is an Abney level used for?
Abney levels are easier to use and inexpensive. They are used to measure degrees, percent of grade and topographic elevation. The user can then determine height, volume and grade through manipulating the readings with trigonometry.
Which instrument can be used when the shape of boundaries are very irregular?
The planimeter is a drafting instrument used to measure the area of a graphically represented planar region. The region being measured may have any irregular shape, making this instrument remarkably versatile.8 jan. 2012
What instrument is used to measure irregular figures?
Planimeter