File:Moving coil instrument principle.png
Original file (2,056 × 4,108 pixels, file size: 1.88 MB, MIME type: image/png)
Captions
Summary[edit]
DescriptionMoving coil instrument principle.png |
English: Technical realisation of a moving coil instrument. Legend for numbers in the illustration:
1) Core for moving coil, 2) Permanent magnet, 3) Pole "shoe" for focusing magnetic field, 4) Dial, 5) Aiming mirror on dial, 6) Coil spring, 7) Coil, 8) Coil at rest, 9) Coil at full deflection, 10) Coil yoke, 11) intentionally left out, 12) Pointer, 13) Pointer at rest, 14) Pointer at full deflection. Deutsch: Technische Ausführung eines Drehspulinstruments. Legende: 1) Weicheisenkern der Drehspule, 2) Permanentmagnet, 3) Polschuh zur Bündelung des Magnetfeldes, 4) Skala, 5) Hilfsspiegel zur genauen Ablesung, 6) Rückstellfeder, 7) Drehspule, 8) Drehspule in Nulllage, 9) Drehspule bei Maximalausschlag, 10) Joch der Spule, 11) (fehlt), 12) Zeiger, 13) Zeiger in Nulllage, 14) Zeiger bei Maximalausschlag. |
Date | |
Source | Self made with POV-Ray. See source code below. |
Author |
Søren Peo Pedersen (User:Peo) Reworked version Dr. Schorsch (talk) 08:43, 6 November 2018 (UTC) |
Licensing[edit]
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Pov-Ray Source code[edit]
The scene description code below supports rendering both of the two sections in this illustration using the free software Povray; the overall view at the top, and the close-up below. The two sections were subsequently combined, and the numbers added, in a graphics software package.
Display source code |
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/* ======================================================= Demonstrating the principle of a moving coil instrument ------------------------------------------------------- Created by Søren Peo Pedersen - see my user page at http://da.wikipedia.org/wiki/Bruger:Peo ======================================================= */ #declare CloseUp=yes; #declare Fontname="arialbd.ttf"; global_settings {max_trace_level 256} #local txtMetal=texture { pigment {color rgb .5} finish { metallic phong 1 reflection .5 } } #include "functions.inc" #local CoilSpring=isosurface {function {f_spiral(-x,z/5,y,.2,.01,1.34,0,0,0)} contained_by { box {<-2,-2,-.2>,<2,2,.2>} } // container shape accuracy 0.001 // accuracy of calculation [0.001] max_gradient 4 // maximum gradient the function can have [1.1] texture {txtMetal} } #macro txtCoilYoke(Transparency) texture {pigment {color rgbt <.5,1,0,Transparency>} finish {ambient .4}} #end #macro MovingPart(Transparency) #local txtCopper=texture { // Texture for copper wire in coil pigment {color #if (Transparency=0) rgb <.5,.25,.15> #else rgbt <1,.5,.3,Transparency> #end } finish { #if (Transparency=0) metallic 1 reflection rgb <1,.5,.3> phong 1 ambient .4 #end } } #local FramePart=merge { // One of four "sides" in the square-shaped coil difference { // Staright parts of coil yoke box {<-.3,1,-1.00001>,<.3,1.5,1.00001>} box {<-.25,1.05,-2>,<.25,2,2>} txtCoilYoke(Transparency) } difference { // Rounded corners of coil yoke cylinder {<-.3,1,-1>,<.3,1,-1>,.5} box {<-.25,0,-2>,<.25,2,0>} box {<-1,1,-2>,<1,2,-1> inverse} txtCoilYoke(Transparency) } #local n=0; // Outermost layer of windings on coil #while (n<11) cylinder {<-.275+.05*n,1.4,-1.00001>,<-.275+.05*n,1.4,1.00001>,.025 texture {txtCopper}} intersection { torus {.4,.025} box {<0,-1,-1>,<1,1,0>} rotate <0,0,90> translate <-.275+.05*n,1,-1> texture {txtCopper} } #local n=n+1; #end #local n=0; #while (n<7) cylinder {<.225,1.35-.05*n,-1.00001>,<.225,1.35-.05*n,1.00001>,.025 texture {txtCopper}} intersection { torus {.35-.05*n,.025} box {<0,-1,-1>,<1,1,0>} rotate <0,0,90> translate <.225,1,-1> texture {txtCopper} } #local n=n+1; #end } #merge { // The entire mobile coil on its yoke: #object {FramePart} #object {FramePart rotate <90,0,0>} #object {FramePart rotate <180,0,0>} #object {FramePart rotate <270,0,0>} box {<-.03,0,-1.79>,<.03,5,-1.81> // Needle pigment {color rgbt <0,0,0,Transparency>} // Changed by user:xorx due to this comment rotate <0,0,-90> } } #end #declare MagnetPoleShoe=merge { cylinder {<-1.44222,-.9,-.8>,<-1.44222,-.9,.8>,.1} cylinder {<-1.44222, .9,-.8>,<-1.44222, .9,.8>,.1} sphere {<-1.44222,-.9,-.8>,.1} sphere {<-1.44222, .9,-.8>,.1} sphere {<-1.44222,-.9, .8>,.1} sphere {<-1.44222, .9, .8>,.1} cylinder {<-1.44222,-.9,-.8>,<-1.8,-.9,-.8>,.1} cylinder {<-1.44222,-.9, .8>,<-1.8,-.9, .8>,.1} cylinder {<-1.44222, .9,-.8>,<-1.8, .9,-.8>,.1} cylinder {<-1.44222, .9, .8>,<-1.8, .9, .8>,.1} box {<-1.8,.9,-.8>,<-1.44222,1,.8>} box {<-1.8,-1,-.8>,<-1.44222,-.9,.8>} difference { box {<-1.8,-.9,-.9>,<0,.9,.9>} cylinder {<0,0,-5>,<0,0,5>,1.7} } difference { box {<-1.799999,-.837596,-.8>,<0,.837596,.8>} cylinder {<0,0,-5>,<0,0,5>,1.6} } difference { merge { torus {1.7,.1 rotate <90,0,0> translate <0,0,-.8>} torus {1.7,.1 rotate <90,0,0> translate <0,0,.8>} } plane {<0,1,0>,0 rotate <0,0,31.9657>} plane {<0,-1,0>,0 rotate <0,0,-31.9657>} } texture {txtMetal} } #object {MagnetPoleShoe} #object {MagnetPoleShoe scale <-1,1,1>} #if (CloseUp) // Changed by user:xorx due to this comment #object{MovingPart(0) translate <0,0,-.000001> rotate <0,0,135>} #object {MovingPart(.7) rotate <0,0,45>} #else #object{MovingPart(0) rotate <0,0,100>} #end cylinder {<0,0,-2>,<0,0,-1.5>,.4 txtCoilYoke(0)} cylinder {<0,0,1.5>,<0,0,1.7>,.4 txtCoilYoke(0)} cylinder {<0,0,-2.5>,<0,0,-2>,.1 texture {txtMetal}} cylinder {<0,0,1.7>,<0,0,2.2>,.1 texture {txtMetal}} #object {CoilSpring translate <0,0,1.6>} #object {CoilSpring translate <0,0,-1.6>} merge { // Core inside moving coil cylinder {<0,0,-.9>,<0,0,.9>,.8} cylinder {<0,0,-.8>,<0,0,.8>,.9} torus {.8,.1 rotate <90,0,0> translate <0,0,-.8>} torus {.8,.1 rotate <90,0,0> translate <0,0,.8>} texture {txtMetal} } merge { // Frame & screw for mechanical adjustment difference { box {<-.2,-2,-2.8>,<.2,.2,2.5>} box {<-1,-1.25,-2.2>,<1,1,1.9>} box {<-1,-1.6,-1.5>,<1,1,1.5>} } cylinder {<0,0,-2.8>,<0,0,-3.3>,.2} difference { cylinder {<0,0,-3.3>,<0,0,-4>,.4} sphere {<0,0,-2>,1.6 inverse} box {<-1,-.1,-5>,<1,.1,-3.4>} } pigment {color rgb <0,.5,1>} finish {ambient .4} } difference { // Horse-shoe permanent magnet merge { box {<-3.8,-1,-1>,<3.8,3,1>} cylinder {<0,3,-1.000001>,<0,3,1.000001>,3.8} } box {<-1.8,-2,-2>,<1.8,3,2>} cylinder {<0,3,-2>,<0,3,2>,1.8} pigment { object { union { text {ttf Fontname,"S",1,0 scale 3.1 translate <-3.7,-.85,-1.5>} difference { plane {<-1,0,0>,0} text {ttf Fontname,"N",1,0 scale 3.1 translate <1.9,-.85,-1.5>} } } color rgb 1 color rgb <1,0,0> } } finish {ambient .4} } box {<-4.3,3,-1.7>,<4.3,6,-1.68> // Scale behind needle: pigment { object { union { #local n=0; #while (n<101) #local h=5.1; #if (n/5=int(n/5)) #local h=5.2; #end #if (n/10=int(n/10)) #local h=5.3; #local Number=text {ttf Fontname,str(n/10,0,0),.04,0 scale .5} #object { Number translate <(min_extent(Number).x-max_extent(Number).x)/2,5.35,-1.71> rotate <0,0,45-.9*n> } #end box { <-.01,4.8,-1.71>,<.01,h,-1.69> rotate <0,0,45-.9*n> } #local n=n+1; #end } color rgbt <1,1,1,.5> color rgbt <0,0,0,.5> } } finish {ambient .4} } difference { cylinder {<0,0,-1.7002>,<0,0,-1.7001>,4.75} cylinder {<0,0,-2>,<0,0,-1>,4.55} box {<0,0,-2>,<9,9,-1> inverse rotate <0,0,45>} pigment {color rgb 0} finish {reflection .95} } #declare Spotty=pigment { bozo color_map { [0 color rgb .5] [1 color rgb 1] } scale .05 } sky_sphere { pigment { gradient z pigment_map { [0 Spotty] [.8 Spotty] [.913 color rgb <1,1,1>] [1 color rgb <1,1,1>] } scale 2 translate <0,0,-1> rotate <15.5,28.5,0> } } camera { up <0,1,0> right <.93,0,0> location <-5,5,-9> #if (CloseUp) look_at <0,-.45,-.8> angle 24 #else look_at <-.55,2.4,-.8> #end } light_source {<50,150,100> color rgb 1} light_source {<-100,80,-150> color rgb 1} |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:12, 5 November 2018 | 2,056 × 4,108 (1.88 MB) | Xorx (talk | contribs) | Higher resolution, removed digit 11 (no valid description). Using circled digits. | |
19:56, 26 February 2009 | 1,010 × 2,015 (644 KB) | Xorx (talk | contribs) | Corrected coil position (see discussion) | ||
21:49, 19 February 2009 | 1,010 × 2,015 (753 KB) | Xorx (talk | contribs) | Corrected positions of coil. | ||
19:16, 24 June 2005 | 946 × 2,020 (580 KB) | Peo~commonswiki (talk | contribs) | Shows the working principle for a moving coil intrument. Legend for numbers in the illustration: # Core for moving coil # Permanent magnet # Pole "shoe" for focusing magnetic field # Dial # Aiming mirror on dial # Coil spring # Coil # Coil at rest # Coil |
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Metadata
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Horizontal resolution | 28.35 dpc |
Vertical resolution | 28.35 dpc |
File change date and time | 16:10, 5 November 2018 |