Planimeter - Wikipedia
The working of the linear planimeter may be explained by measuring the area of a rectangle ABCD (see image). Moving with the pointer from A to B the arm EM moves through the yellow …
Polar and Linear Planimeters - Wabash College
2004年1月2日 · Linear Planimeter The two planimeters differ in the movement of the end of the tracer arm opposite the tracer point. In the linear planimeter, that end is restricted to move …
Linear - Smithsonian Institution
Amsler is also credited with conceiving a design for a planimeter that restricted the movement of the end of the tracer arm opposite the tracer point to a straight line. The collections suggest …
How Planimeters Work - Wabash College
2009年5月26日 · 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. …
不再害怕求阴影面积 - 知乎 - 知乎专栏
不过，确实有一种机械仪器“求积仪”（Planimeter）可以做到这件事：只要用探针沿着纸上的图形绕一周，就能直接测量出图形面积。 并且，使用这种仪器所得到的测量结果是 理论上 完全精确 …
Linear - National Museum of American History
This German silver linear planimeter is T-shaped. The base of the T has a measuring scale, which no longer can be read due to rust, and a metal wheel that slides up and down the scale when …
ingenious device called planimeter was invented in 1814 to satisfy the need of land surveyors and other real life applications. There is an extensive literature devoted to the mathematics
the planimeter traces out the curve, the roller moves up and down the y-axis, while the tracer arm rotates on the pivot. Hence the rolling planimeter is really a form of linear planimeter (as …
The Planimeter and the Theorem of Green - Harvard University
2000年12月9日 · 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 …
Planimeters - Wabash College
2007年8月24日 · A planimeter is a mechanical instrument used to compute the area of a planar region. Here are some examples.
- 某些结果已被删除