Planimeter - Wikipedia
A planimeter, also known as a platometer, is a measuring instrument used to determine the area of an arbitrary two-dimensional shape.
About Mechanical and Electrical Planimeters to Measure Area
Mechanical planimeters are the most popular types since they are economical and offer good overall accuracy and range for most applications involving medium sized areas. The measuring wheel rides directly on the measuring surface.
The Planimeter and the Theorem of Green - Harvard University
Dec 9, 2000 · 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.
Amazon.com: Planimeter
Planimeter Sliding Roller Drum Type high-Grade Drafting & Surveying Instrument Tool 28"" 710 mm with Protective Box, As Shown In Image, AEW-026 $89.99 $ 89 . 99 Buy 3, save 5%
How Planimeters Work - Wabash College
May 26, 2009 · When a planimeter is used to measure a region, the user moves the right endpoint of the rod, the tracing point, around the boundary of the region to be measured. Consequently the desired area is A R. For a linear planimeter, the left endpoint moves back and forth along a line, enclosing no area, and so A L = 0.
Lasico Digital Planimeters, Mechanical Planimeters, Area …
Planimeters are available with mechanical or electronic measuring mechanisms. If you want to measure area, then a planimeter is the perfect tool for the job. Lasico Planimeters are used for measurements of areas of any shape from plans, maps, recorder diagrams, photographs, x …
Buyers Guide To Planimeters Learning Center Tiger Supplies
Sep 10, 2019 · Mechanical planimeters are manual devices that usually consist of a base, tracer arm, pole arm, and a tracer lens. How it works is you anchor the base to a spot in your work area (the base has a sharp needle that you’ll use for anchoring), extend the pole arm, and trace the 2D shape with the tracer lens.
the 19th century, practical mechanical tools, called planimeters, were patented for determin- ing the area of planar regions. There is an extensive literature devoted to the mathematics
Polar and Linear Planimeters - Wabash College
Jan 2, 2004 · These planimeters are used by moving the tracer point around the boundary of the region being measured. As the tracer point moves the wheel partially rolls and partially slides on the paper, recording its motion perpendicular to the tracer arm.
Planimeters - Wabash College
Aug 24, 2007 · A planimeter is a mechanical instrument used to compute the area of a planar region. Here are some examples. How polar and linear planimeters are used. How planimeters work. Using a planimeter to prove the isoperimetric inequality. A Plethora of Planimeters! Historic Information & Photos of Antique Planimeters. Mathematical Details.
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