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</o:shapelayout></xml><![endif]--></head><body lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dovolil jsem si zalozit zvlastni vlakno a odpovedet na dotazy, které mi prisly soukrome, verim, ze to bude zajímat i ostatní cleny konference.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Jak je to s rychlosti sireni zvuku.<o:p></o:p></b></p><p class=MsoNormal>Rychlost sireni zvuku ve vzduchu je funkci teploty, tlaku a vlhkosti.<o:p></o:p></p><p class=MsoNormal>Pro tlak <span style='font-family:"Arial","sans-serif"'>101325 Pa a 0% vlhkost plati empiricky vzorec c=331,3+0,606*T </span><span lang=EN-US style='font-family:"Arial","sans-serif"'>[m/s] kde T je teplota vzduchu v C. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Pokud chceme byt presnejsi musime pouzit podstatne komplikovanejsi postup.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Nechce se mi popisovat teorie, zde je cast kodu, ktera provadi vypocet rychlosti, vstupni veliciny jsou T= teplota v C, P=tlak v Pa a Rh= vlhkost v %, vysledna rychlost je pak v C [m/s]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> T; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// temperature deg C</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> P; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// pressure</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> Rh; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// relative humidity</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> C; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// speed</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> Xc, Xw; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// Mole fraction of carbon dioxide and water vapour</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> H; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// respectively molecular concentration of water vapour</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> C1; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// Intermediate calculations</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> C2;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> C3;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> ENH;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> PSV;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> PSV1;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> PSV2;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> T_kel; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// ambient temperature (Kelvin)</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> StrMsg; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// alert text</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> Kelvin = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>273.15</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// For converting to Kelvin</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:CS'>var</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> e = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>2.71828182845904523536</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>T_kel = Kelvin + T; </span><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// Measured ambient temp</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// Molecular concentration of water vapour calculated from Rh</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'> <span style='color:green'>using Giacomos method by Davis (1991) as implemented in DTU report 11b-1997</span><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>ENH = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>3.14</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-8</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)*P + </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>1.00062</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> + sqr(T)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>5.6</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-7</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>);</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// These commented lines correspond to values used in Cramer (Appendix)</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>PSV1 = sqr(T_kel)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>1.2378847</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-5</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-1.9121316</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-2</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)*T_kel;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>PSV2 = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>33.93711047</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>-</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>6.3431645</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>3</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)/T_kel;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>PSV = Math.pow(e,PSV1)*Math.pow(e,PSV2);</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>H = Rh*ENH*PSV/P;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>Xw = H/</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>100.0</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>Xc = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>400.0</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-6</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>);</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:CS'>// Speed calculated using the method</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'> <span style='color:green'>of Cramer from JASA vol 93 p. 2510</span><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>C1 = </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>0.603055</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*T + </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>331.5024</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> - sqr(T)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>5.28</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-4</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>) + (</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>0.1495874</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*T + </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>51.471935</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> -sqr(T)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>7.82</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-4</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>))*Xw;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>C2 = (</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-1.82</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-7</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)+</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>3.73</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-8</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)*T-sqr(T)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>2.93</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>))*P+(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-85.20931</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>-</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>0.228525</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*T+sqr(T)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>5.91</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-5</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>))*Xc;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>C3 = sqr(Xw)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>2.835149</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> - sqr(P)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>2.15</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-13</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>) + sqr(Xc)*</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>29.179762</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'> + </span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>4.86</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>*Math.pow(</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>10</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>,</span><span style='font-size:10.0pt;font-family:"Courier New";color:red;mso-fareast-language:CS'>-4</span><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>)*Xw*P*Xc;</span><span style='font-size:10.0pt;font-family:"Courier New";mso-fareast-language:CS'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:CS'>C = C1 + C2 - C3;<o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'>Pro <span style='font-family:"Arial","sans-serif"'>101325 Pa a Rh=0% a T=20C vychazi c=343.36m/s pro Rh=30% 343.74m/s Rh=100% c=344.62m/s.<o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b>Jake je doporucene zapojeni senzoru<o:p></o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'>Pokud se budeme bavit o transtuceru tedy vysilac/prijimac v jednom, je ve vetsine doporucenych zapojeni bohuzel traficko , blizsi viz <a href="http://www.futurlec.com/USTR60-10H.shtml">http://www.futurlec.com/USTR60-10H.shtml</a><o:p></o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><a href="http://www.produktinfo.conrad.com/datenblaetter/150000-174999/173681-da-01-cs-Sensor_MA_40_E1_E7R_MA_40_E1_E7S.pdf">http://www.produktinfo.conrad.com/datenblaetter/150000-174999/173681-da-01-cs-Sensor_MA_40_E1_E7R_MA_40_E1_E7S.pdf</a><o:p></o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b>Jaky zvolit senzor <o:p></o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'>Dostupne jsou senzory s centr frequency 25,40,45,50 a 60kHz. Z mého pohledu cim vyssi frekvence tim lepe, jednak se tim zkracuje Decay Time tedy prodleva mezi koncem vysilani a začátkem prijmu (u 60kHz je pod 1ms), druhak 25kHz cidla mohou plasit zvířata, v neposledni rade při mereni rychlosti proudeni zvlaste vetru se doporucuji cidla 40 a vice.<o:p></o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'>Pokud jde o mereni rychlosti vetru doporucuji tento projekt <a href="http://www.technik.ba-ravensburg.de/~lau/ultrasonic-anemometer.html">http://www.technik.ba-ravensburg.de/~lau/ultrasonic-anemometer.html</a><o:p></o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b>Kde koupit cidla?<o:p></o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><a href="http://www.futurlec.com/Ultrasonic_Sensors.shtml">http://www.futurlec.com/Ultrasonic_Sensors.shtml</a><o:p></o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><a href="http://www.futurlec.com/Pressure_Sensors.shtml">http://www.futurlec.com/Pressure_Sensors.shtml</a><o:p></o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><o:p> </o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'>Chystam se u nich objednávat, pokud se chce někdo pripojit, není problem, pokud jde o cenu, jejich dolarova cena * aktulani kuz + 60Kc (40Kc postovne v CR 20Kc příspěvek na postovne od Futurlec<span lang=EN-US>)<o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span lang=EN-US>Ctene pozornosti doporucuji I2C tlakovecidlo 15bit za 5.5$ to je proste zadarmo a waterproof 60kHz ultrazvukovy sensor par za 5.9$. Farnell chce za 1ks 40KHz 330Kc bez DPH.<o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span lang=EN-US>PN<o:p></o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><o:p> </o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><o:p> </o:p></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><b><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></b></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p><p class=MsoNormal style='text-indent:-6.0pt;background:white'><o:p> </o:p></p></div></body></html>