45 lines
1.5 KiB
TeX
45 lines
1.5 KiB
TeX
% Author: Prof. Dr. Matthias Jung, DL9MJ
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% Year: 2024
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\begin{tikzpicture}
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% Define a formula for the coil.
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% This is what the numbers mean:
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% A ... how far the rings are apart
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% B ... how much from the side the rings are seen (try 0 and the same as the radius)
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% C ... radius of the rings
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\def\coil#1{
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% A B
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{0.3 * (2*#1 + \t) + 0.55*sin(\t * pi r))},
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% C
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{1.0 * cos(\t * pi r)}
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}
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% Draw the rectangle
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\draw[thick] (0,-0.60) to [open, name={n1}] (3.75,0.80);
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\draw[thick](n1) ++(-0.15,0) node[
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cylinder,
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draw=black,
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cylinder uses custom fill,
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cylinder body fill = black!10,
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cylinder end fill = black!40,
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aspect=3.0,
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minimum width = 1.4cm*\getDarcImageFactor,
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minimum height = 4.25cm*\getDarcImageFactor
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](c){};
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% Draw the part of the coil in front of the rectangle
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\foreach \n in {0,1,...,5} {
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\draw[domain={0.7:2.2},smooth,variable=\t,samples=15, thick]
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plot (\coil{\n});
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}
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\draw[domain={ 0.0:0.5},smooth,variable=\t,samples=15,thick] plot (\coil{6});
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\draw[domain={-0.5:0.2},smooth,variable=\t,samples=15,thick] plot (\coil{0});
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\draw[thick] (-0.7,0) coordinate(start) to [short,-o] (-0.7,-2);
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\draw[thick] (4.3,0) coordinate(end) to [short,-o] (4.3,-2);
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\DARCmeasure{start}{end}{0,1.25}{0}{$l$}
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\draw[Triangle-](c.east) ++(-0.2,0) -- ++(1,-1) node[anchor=north west](){$A_S$};
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\draw(c.south) ++(0,-0.75) node[](){$N$};
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\end{tikzpicture}
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