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Update short_dipole.html 

Major cleanup. Added visual indicators.
pull/2/head
miguel 2023-03-26 17:10:30 +11:00
rodzic ab0257f632
commit 73014bb128
1 zmienionych plików z 76 dodań i 39 usunięć
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115
short_dipole.html
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@ -7,7 +7,7 @@
<link rel="stylesheet" href="inductor.css">
</head>
<body>
<header><a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Loaded Dipole Antenna Calculator<br></header>
<header><a href="mailto:vk3cpu@gmail.com">VK3CPU</a> - Loaded Dipole Calculator<br></header>
<section class="gridLayoutClass">
<div id="inductor-container" class="inductor-container" style="position: relative;">
<canvas id="inductor2D" class="inductorClass" width="350" height="350">
@ -15,15 +15,15 @@
</div>
<div class="slider_container">
<div class="sliders">
<label for="frequency_slider">f:</label>
<input type="range" id="frequency_slider" min="0.0" max="5.0" value="1.0" step="0.01">
<label for="frequency_slider">f(MHz):</label>
<input type="range" id="frequency_slider" min="0.0" max="6.4" value="1.0" step="0.01">
</div>
<div class="sliders">
<label for="antenna_length_slider">l:</label>
<input type="range" id="antenna_length_slider" min="0.1" max="1.0" value="1.0" step="0.005">
<label for="antenna_length_slider">l(%):</label>
<input type="range" id="antenna_length_slider" min="10" max="100" value="100" step="0.5">
</div>
<div class="sliders">
<label for="inductor_distance_slider">d:</label>
<label for="inductor_distance_slider">d(%):</label>
<input type="range" id="inductor_distance_slider" min="10" max="80" value="50" step="0.5">
</div>
<div class="sliders">
@ -104,8 +104,7 @@
var dipole = {
length_meters : 0.0,
cond_diameter_meters : 0.0,
spacing_ratio : 0.0,
loop_turns : 0.0,
inductor_distance_ratio : 0.0,
frequency_hz : 0.0,
L : 0.0,
@ -116,12 +115,12 @@
function recalculate() {
// Input variables:
//dipole.length_meters = 0.001 * antenna_length_slider.value * 25.4; // Inches to mm then to m
dipole.frequency_hz = 1.8e6 * (2 ** frequency_slider.value);
dipole.length_meters = 299792458.0 * 0.95 * antenna_length_slider.value / (2.0 * dipole.frequency_hz); //
dipole.frequency_hz = 1.8e6 * (2.0 ** frequency_slider.value);
dipole.length_meters = 299792458.0 * 0.0095 * antenna_length_slider.value / (2.0 * dipole.frequency_hz); //
dipole.length_feet = dipole.length_meters * 3.28084;
dipole.cond_diameter_meters = 0.001 * awgToMm(40.0 - conductor_diameter_slider.value);
dipole.cond_diameter_inches = dipole.cond_diameter_meters * 39.37008;
dipole.spacing_ratio = 0.01 * inductor_distance_slider.value;
dipole.inductor_distance_ratio = 0.01 * inductor_distance_slider.value;
dipole.distance_meters = inductor_distance_slider.value * 0.005 * dipole.length_meters;
dipole.distance_feet = dipole.distance_meters * 3.28084;
@ -130,7 +129,7 @@
dipole.length_feet,
dipole.distance_feet,
dipole.cond_diameter_inches);
dipole.L = dipole.Xl / (2 * Math.PI * dipole.frequency_hz * 0.000001);
dipole.L = dipole.Xl / (2 * Math.PI * dipole.frequency_hz * 1e-6);
}
// Specify fonts for changing parameters controlled by the sliders:
@ -139,24 +138,24 @@
var emphasis_font = "bold 14px arial";
const emphasis_delay = 1200;
var loop_dia_timer_handler = 0;
var loop_dia_font = normal_font;
var antenna_length_timer_handler = 0;
var antenna_length_font = normal_font;
antenna_length_slider.oninput = function() {
recalculate();
if(loop_dia_timer_handler == 0) {
loop_dia_font = emphasis_font;
loop_dia_timer_handler = setTimeout(function(){
loop_dia_font = normal_font;
if(antenna_length_timer_handler == 0) {
antenna_length_font = emphasis_font;
antenna_length_timer_handler = setTimeout(function(){
antenna_length_font = normal_font;
drawDesign();
loop_dia_timer_handler = 0;
antenna_length_timer_handler = 0;
}, emphasis_delay);
} else {
clearTimeout(loop_dia_timer_handler);
loop_dia_timer_handler = setTimeout(function(){
loop_dia_font = normal_font;
clearTimeout(antenna_length_timer_handler);
antenna_length_timer_handler = setTimeout(function(){
antenna_length_font = normal_font;
drawDesign();
loop_dia_timer_handler = 0;
antenna_length_timer_handler = 0;
}, emphasis_delay);
}
drawDesign();
@ -284,10 +283,14 @@
ctx.lineCap = 'round';
ctx.beginPath();
ctx.moveTo(x, y - l1 - 2);
ctx.lineTo(x - l1 - 2, y - 0.66*l1);
ctx.moveTo(x + l1 + 2, y - 0.33*l1);
ctx.lineTo(x - l1 - 2, y + 0.33*l1);
ctx.moveTo(x + l1 + 2, y + 0.66*l1);
ctx.lineTo(x - l1 - 2, y - 0.875*l1);
ctx.moveTo(x + l1 + 2, y - 0.625*l1);
ctx.lineTo(x - l1 - 2, y - 0.375*l1);
ctx.moveTo(x + l1 + 2, y - 0.125*l1);
ctx.lineTo(x - l1 - 2, y + 0.125*l1);
ctx.moveTo(x + l1 + 2, y + 0.375*l1);
ctx.lineTo(x - l1 - 2, y + 0.625*l1);
ctx.moveTo(x + l1 + 2, y + 0.875*l1);
ctx.lineTo(x, y + l1 + 2);
ctx.stroke();
ctx.lineWidth = last_width;
@ -358,53 +361,87 @@
fctx.lineWidth = last_width;
const d_pos = up_wire_bot_y - dipole.spacing_ratio * (up_wire_bot_y - up_wire_top_y);
// Draw relative zero indicator lines:
if(antenna_length_font == emphasis_font) {
fctx.beginPath();
fctx.moveTo(50, up_wire_top_y);
fctx.lineTo(20, up_wire_top_y);
fctx.lineTo(20, up_wire_bot_y);
fctx.lineTo(50, up_wire_bot_y);
fctx.stroke();
fctx.beginPath();
fctx.moveTo(win_width - 50, up_wire_top_y);
fctx.lineTo(win_width - 20, up_wire_top_y);
fctx.lineTo(win_width - 20, down_wire_bot_y);
fctx.lineTo(win_width - 50, down_wire_bot_y);
fctx.stroke();
}
const d_pos = up_wire_bot_y - dipole.inductor_distance_ratio * (up_wire_bot_y - up_wire_top_y);
fctx.textAlign = "right";
// Draw top inductor:
drawInductor(fctx, wire_x, d_pos, 0.0*Math.PI);
drawArrow(fctx, wire_x - 30, d_pos, 0.5*Math.PI);
fctx.font = spacing_font;
fctx.fillText(dipole.distance_meters.toFixed(2).toString() + " m", wire_x - 60, d_pos + 12 );
fctx.fillText(dipole.distance_feet.toFixed(2).toString() + " ft", wire_x - 60, d_pos - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.distance_feet), wire_x - 60, d_pos - 4);
fctx.font = normal_font;
// Draw midpoint arrow:
drawArrow(fctx, wire_x - 30, up_wire_bot_y, 0.5*Math.PI);
fctx.fillText("0.00", wire_x - 60, up_wire_bot_y + 5);
// Draw top-left arrow and associated text:
if(spacing_font == emphasis_font) {
fctx.beginPath();
fctx.moveTo(50, d_pos);
fctx.lineTo(20, d_pos);
fctx.lineTo(20, up_wire_bot_y);
fctx.lineTo(50, up_wire_bot_y);
fctx.stroke();
}
// Draw single element length arrow and associated text:
fctx.font = antenna_length_font;
drawArrow(fctx, wire_x - 30, up_wire_top_y, 0.5*Math.PI);
fctx.fillText((dipole.length_feet * 0.5).toFixed(2).toString() + " ft", wire_x - 60, up_wire_top_y - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet * 0.5), wire_x - 60, up_wire_top_y - 4);
fctx.fillText((dipole.length_meters * 0.5).toFixed(2).toString() + " m", wire_x - 60, up_wire_top_y + 12);
// Draw midpoint arrow:
drawArrow(fctx, wire_x - 30, up_wire_bot_y, 0.5*Math.PI);
fctx.fillText("0.00", wire_x - 60, up_wire_bot_y + 5);
fctx.textAlign = "left";
// Draw antenna length text:
//fctx.font = antenna_length_font;
fctx.fillText(dipole.length_feet.toFixed(2).toString() + " ft", wire_x + 60, up_wire_top_y - 4);
//fctx.fillText(getFeetAndInchesFromFeet(dipole.length_feet), wire_x + 60, up_wire_top_y - 4);
fctx.fillText(dipole.length_meters.toFixed(2).toString() + " m", wire_x + 60, up_wire_top_y + 12);
fctx.fillText("0.00", wire_x + 60, down_wire_bot_y + 5);
fctx.font = emphasis_font;
fctx.fillText("L = " + dipole.L.toFixed(1).toString() + " \u00B5H", wire_x + 30, d_pos - 4);
// Display calculated results:
//fctx.font = emphasis_font;
fctx.font = normal_font;
fctx.fillText("L = " + dipole.L.toFixed(1).toString() + " \u00B5H", wire_x + 30, d_pos - 4);
fctx.fillText("X = " + dipole.Xl.toFixed(1).toString() + " \u03A9", wire_x + 30, d_pos + 12);
fctx.font = frequency_font;
// Input controls displays:
const left_spacing = 15;
fctx.font = frequency_font;
fctx.fillText("f = " + (dipole.frequency_hz * 1e-6).toFixed(2).toString() + " MHz", left_spacing, down_wire_bot_y - 72);
fctx.font = loop_dia_font;
fctx.fillText("l = " + (antenna_length_slider.value * 1e2).toFixed(1).toString() + " %", left_spacing, down_wire_bot_y - 54);
fctx.font = antenna_length_font;
fctx.fillText("l = " + (antenna_length_slider.value * 1.0).toFixed(1).toString() + " %", left_spacing, down_wire_bot_y - 54);
fctx.font = spacing_font;
fctx.fillText("d = " + (inductor_distance_slider.value * 1.0).toFixed(1).toString() + " %", left_spacing, down_wire_bot_y - 36);
fctx.font = cond_dia_font;
fctx.fillText("AWG = " + (40-conductor_diameter_slider.value).toString(), left_spacing, down_wire_bot_y - 18);
fctx.fillText("\u2300 = " + cond_diameter_inches.toFixed(4).toString() + "\" " +
"(" + cond_diameter_mm.toFixed(3).toString() + " mm)", left_spacing, down_wire_bot_y);
fctx.font = normal_font;
// Draw bottom inductor:
drawInductor(fctx, wire_x, down_wire_top_y + dipole.spacing_ratio * (up_wire_bot_y - up_wire_top_y), 0.0*Math.PI);
drawInductor(fctx, wire_x, down_wire_top_y + dipole.inductor_distance_ratio * (up_wire_bot_y - up_wire_top_y), 0.0*Math.PI);
// Draw arrows on the right side of the antenna, to depict full dipole length:
drawArrow(fctx, wire_x + 30, up_wire_top_y, -0.5*Math.PI);