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invalid color string: rgba(50, 48, 47)
(termite:25037): GLib-WARNING **: 14:10:26.520: GChildWatchSource: Exit status of a child process was requested but ECHILD was received by waitpid(). See the documentation of g_child_watch_source_new() for possible causes.

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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<!-- 2019-05-06 lun. 10:28 -->
<!-- 2019-05-06 lun. 14:16 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Measurements</title>
@ -254,64 +254,64 @@ for the JavaScript code in this tag.
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#org157e9c7">1. Effect of the rotation of the Slip-Ring</a>
<li><a href="#org0ba7d8d">1. Effect of the rotation of the Slip-Ring</a>
<ul>
<li><a href="#orgb6072a4">1.1. Measurement Description</a></li>
<li><a href="#orgecd569a">1.2. Load data</a></li>
<li><a href="#org3836a40">1.3. Analysis</a></li>
<li><a href="#orgc938992">1.4. Conclusion</a></li>
<li><a href="#orgac49742">1.1. Measurement Description</a></li>
<li><a href="#org6434d5d">1.2. Load data</a></li>
<li><a href="#orga93c712">1.3. Analysis</a></li>
<li><a href="#org87e1c5d">1.4. Conclusion</a></li>
</ul>
</li>
<li><a href="#org64d6a43">2. Measure of the noise of the Voltage Amplifier</a>
<li><a href="#org3930587">2. Measure of the noise of the Voltage Amplifier</a>
<ul>
<li><a href="#org3cb5cbc">2.1. Measurement Description</a></li>
<li><a href="#org9a88df6">2.2. Load data</a></li>
<li><a href="#org9594967">2.3. Time Domain</a></li>
<li><a href="#orgb6ac137">2.4. Frequency Domain</a></li>
<li><a href="#org2bfd545">2.5. Conclusion</a></li>
<li><a href="#org39ab0d4">2.1. Measurement Description</a></li>
<li><a href="#org05e21ac">2.2. Load data</a></li>
<li><a href="#org94d0313">2.3. Time Domain</a></li>
<li><a href="#org4ce7550">2.4. Frequency Domain</a></li>
<li><a href="#orgddca579">2.5. Conclusion</a></li>
</ul>
</li>
<li><a href="#orgd197020">3. Measure of the noise induced by the Slip-Ring</a>
<li><a href="#orgda176e9">3. Measure of the noise induced by the Slip-Ring</a>
<ul>
<li><a href="#org6be0417">3.1. Measurement Description</a></li>
<li><a href="#org894df46">3.2. Load data</a></li>
<li><a href="#orgfb5cd93">3.3. Time Domain</a></li>
<li><a href="#orge70b1cd">3.4. Frequency Domain</a></li>
<li><a href="#org1067ac0">3.5. Conclusion</a></li>
<li><a href="#org0c723ab">3.1. Measurement Description</a></li>
<li><a href="#orgb59af10">3.2. Load data</a></li>
<li><a href="#orgfa16ec5">3.3. Time Domain</a></li>
<li><a href="#orge0c2b75">3.4. Frequency Domain</a></li>
<li><a href="#org42e6a09">3.5. Conclusion</a></li>
</ul>
</li>
<li><a href="#orga6075e6">4. Measure of the noise induced by the slip ring when using a geophone</a>
<li><a href="#org2d68753">4. Measure of the noise induced by the slip ring when using a geophone</a>
<ul>
<li><a href="#orga3d1fca">4.1. Measurement Description</a></li>
<li><a href="#org874ef1d">4.2. Load data</a></li>
<li><a href="#org3656f2f">4.3. Time Domain</a></li>
<li><a href="#orgf3c9d01">4.4. Frequency Domain</a></li>
<li><a href="#orgbee8de0">4.5. Conclusion</a></li>
<li><a href="#org3d4e974">4.1. Measurement Description</a></li>
<li><a href="#org727e79c">4.2. Load data</a></li>
<li><a href="#orge2a10ee">4.3. Time Domain</a></li>
<li><a href="#org6939b54">4.4. Frequency Domain</a></li>
<li><a href="#org05104a8">4.5. Conclusion</a></li>
</ul>
</li>
<li><a href="#org22d6637">5. Measure of the influence of the AC/DC option on the voltage amplifiers</a>
<li><a href="#org4f273de">5. Measure of the influence of the AC/DC option on the voltage amplifiers</a>
<ul>
<li><a href="#org947094c">5.1. Measurement Description</a></li>
<li><a href="#orgd3f6cb3">5.2. Load data</a></li>
<li><a href="#org85a856a">5.3. Time Domain</a></li>
<li><a href="#org18d9eca">5.4. Frequency Domain</a></li>
<li><a href="#org21d0038">5.5. Conclusion</a></li>
<li><a href="#orgbdff313">5.1. Measurement Description</a></li>
<li><a href="#org002ef0d">5.2. Load data</a></li>
<li><a href="#orgf18b42c">5.3. Time Domain</a></li>
<li><a href="#org7ad219b">5.4. Frequency Domain</a></li>
<li><a href="#org030a799">5.5. Conclusion</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-org157e9c7" class="outline-2">
<h2 id="org157e9c7"><span class="section-number-2">1</span> Effect of the rotation of the Slip-Ring</h2>
<div id="outline-container-org0ba7d8d" class="outline-2">
<h2 id="org0ba7d8d"><span class="section-number-2">1</span> Effect of the rotation of the Slip-Ring</h2>
<div class="outline-text-2" id="text-1">
<p>
The data and matlab files are accessible <a href="data/meas_effect_sr.zip">here</a>.
</p>
</div>
<div id="outline-container-orgb6072a4" class="outline-3">
<h3 id="orgb6072a4"><span class="section-number-3">1.1</span> Measurement Description</h3>
<div id="outline-container-orgac49742" class="outline-3">
<h3 id="orgac49742"><span class="section-number-3">1.1</span> Measurement Description</h3>
<div class="outline-text-3" id="text-1-1">
<p>
Random Signal is generated by one DAC of the SpeedGoat.
@ -400,8 +400,8 @@ Here, the rotation speed of the Slip-Ring is set to 1rpm.
</div>
</div>
<div id="outline-container-orgecd569a" class="outline-3">
<h3 id="orgecd569a"><span class="section-number-3">1.2</span> Load data</h3>
<div id="outline-container-org6434d5d" class="outline-3">
<h3 id="org6434d5d"><span class="section-number-3">1.2</span> Load data</h3>
<div class="outline-text-3" id="text-1-2">
<p>
We load the data of the z axis of two geophones.
@ -414,11 +414,11 @@ sr_on = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="o
</div>
</div>
<div id="outline-container-org3836a40" class="outline-3">
<h3 id="org3836a40"><span class="section-number-3">1.3</span> Analysis</h3>
<div id="outline-container-orga93c712" class="outline-3">
<h3 id="orga93c712"><span class="section-number-3">1.3</span> Analysis</h3>
<div class="outline-text-3" id="text-1-3">
<p>
Let's first look at the signal produced by the DAC (figure <a href="#org9e05a67">1</a>).
Let's first look at the signal produced by the DAC (figure <a href="#org3aa5fe7">1</a>).
</p>
<div class="org-src-container">
@ -432,14 +432,14 @@ xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbo
</div>
<div id="org9e05a67" class="figure">
<div id="org3aa5fe7" class="figure">
<p><img src="figs/random_signal.png" alt="random_signal.png" />
</p>
<p><span class="figure-number">Figure 1: </span>Random signal produced by the DAC</p>
</div>
<p>
We now look at the difference between the signal directly measured by the ADC and the signal that goes through the slip-ring (figure <a href="#orgbaee8bd">2</a>).
We now look at the difference between the signal directly measured by the ADC and the signal that goes through the slip-ring (figure <a href="#orgb56de9a">2</a>).
</p>
<div class="org-src-container">
@ -455,7 +455,7 @@ legend<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-stri
</div>
<div id="orgbaee8bd" class="figure">
<div id="orgb56de9a" class="figure">
<p><img src="figs/slipring_comp_signals.png" alt="slipring_comp_signals.png" />
</p>
<p><span class="figure-number">Figure 2: </span>Alteration of the signal when the slip-ring is turning</p>
@ -476,7 +476,7 @@ win = hanning<span class="org-rainbow-delimiters-depth-1">(</span>ceil<span clas
</div>
<div id="orgd69e796" class="figure">
<div id="org6682917" class="figure">
<p><img src="figs/psd_noise.png" alt="psd_noise.png" />
</p>
<p><span class="figure-number">Figure 3: </span>ASD of the measured noise</p>
@ -484,8 +484,8 @@ win = hanning<span class="org-rainbow-delimiters-depth-1">(</span>ceil<span clas
</div>
</div>
<div id="outline-container-orgc938992" class="outline-3">
<h3 id="orgc938992"><span class="section-number-3">1.4</span> Conclusion</h3>
<div id="outline-container-org87e1c5d" class="outline-3">
<h3 id="org87e1c5d"><span class="section-number-3">1.4</span> Conclusion</h3>
<div class="outline-text-3" id="text-1-4">
<div class="note">
<p>
@ -500,16 +500,16 @@ win = hanning<span class="org-rainbow-delimiters-depth-1">(</span>ceil<span clas
</div>
</div>
</div>
<div id="outline-container-org64d6a43" class="outline-2">
<h2 id="org64d6a43"><span class="section-number-2">2</span> Measure of the noise of the Voltage Amplifier</h2>
<div id="outline-container-org3930587" class="outline-2">
<h2 id="org3930587"><span class="section-number-2">2</span> Measure of the noise of the Voltage Amplifier</h2>
<div class="outline-text-2" id="text-2">
<p>
The data and matlab files are accessible <a href="data/meas_volt_amp.zip">here</a>.
</p>
</div>
<div id="outline-container-org3cb5cbc" class="outline-3">
<h3 id="org3cb5cbc"><span class="section-number-3">2.1</span> Measurement Description</h3>
<div id="outline-container-org39ab0d4" class="outline-3">
<h3 id="org39ab0d4"><span class="section-number-3">2.1</span> Measurement Description</h3>
<div class="outline-text-3" id="text-2-1">
<p>
<b>Goal</b>:
@ -540,8 +540,8 @@ The data and matlab files are accessible <a href="data/meas_volt_amp.zip">here</
</div>
</div>
<div id="outline-container-org9a88df6" class="outline-3">
<h3 id="org9a88df6"><span class="section-number-3">2.2</span> Load data</h3>
<div id="outline-container-org05e21ac" class="outline-3">
<h3 id="org05e21ac"><span class="section-number-3">2.2</span> Load data</h3>
<div class="outline-text-3" id="text-2-2">
<div class="org-src-container">
<pre class="src src-matlab">amp_off = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'mat/data_003.mat', 'data'</span><span class="org-rainbow-delimiters-depth-1">)</span>; amp_off = amp_off.data<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">:</span>, <span class="org-rainbow-delimiters-depth-2">[</span><span class="org-highlight-numbers-number">1</span>,<span class="org-highlight-numbers-number">3</span><span class="org-rainbow-delimiters-depth-2">]</span><span class="org-rainbow-delimiters-depth-1">)</span>;
@ -553,15 +553,15 @@ amp_60d = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="
</div>
</div>
<div id="outline-container-org9594967" class="outline-3">
<h3 id="org9594967"><span class="section-number-3">2.3</span> Time Domain</h3>
<div id="outline-container-org94d0313" class="outline-3">
<h3 id="org94d0313"><span class="section-number-3">2.3</span> Time Domain</h3>
<div class="outline-text-3" id="text-2-3">
<p>
The time domain signals are shown on figure <a href="#orgcfdcbce">4</a>.
The time domain signals are shown on figure <a href="#org0ba0324">4</a>.
</p>
<div id="orgcfdcbce" class="figure">
<div id="org0ba0324" class="figure">
<p><img src="figs/ampli_noise_time.png" alt="ampli_noise_time.png" />
</p>
<p><span class="figure-number">Figure 4: </span>Output of the amplifier</p>
@ -569,8 +569,8 @@ The time domain signals are shown on figure <a href="#orgcfdcbce">4</a>.
</div>
</div>
<div id="outline-container-orgb6ac137" class="outline-3">
<h3 id="orgb6ac137"><span class="section-number-3">2.4</span> Frequency Domain</h3>
<div id="outline-container-org4ce7550" class="outline-3">
<h3 id="org4ce7550"><span class="section-number-3">2.4</span> Frequency Domain</h3>
<div class="outline-text-3" id="text-2-4">
<p>
We first compute some parameters that will be used for the PSD computation.
@ -605,10 +605,10 @@ Sq = q<span class="org-type">^</span><span class="org-highlight-numbers-number">
</div>
<p>
Finally, the ASD is shown on figure <a href="#orgf5bb8f5">5</a>.
Finally, the ASD is shown on figure <a href="#org9677595">5</a>.
</p>
<div id="orgf5bb8f5" class="figure">
<div id="org9677595" class="figure">
<p><img src="figs/ampli_noise_psd.png" alt="ampli_noise_psd.png" />
</p>
<p><span class="figure-number">Figure 5: </span>Amplitude Spectral Density of the measured voltage at the output of the voltage amplifier</p>
@ -616,8 +616,8 @@ Finally, the ASD is shown on figure <a href="#orgf5bb8f5">5</a>.
</div>
</div>
<div id="outline-container-org2bfd545" class="outline-3">
<h3 id="org2bfd545"><span class="section-number-3">2.5</span> Conclusion</h3>
<div id="outline-container-orgddca579" class="outline-3">
<h3 id="orgddca579"><span class="section-number-3">2.5</span> Conclusion</h3>
<div class="outline-text-3" id="text-2-5">
<div class="important">
<p>
@ -629,16 +629,16 @@ Noise induced by the voltage amplifiers is not a limiting factor.
</div>
</div>
<div id="outline-container-orgd197020" class="outline-2">
<h2 id="orgd197020"><span class="section-number-2">3</span> Measure of the noise induced by the Slip-Ring</h2>
<div id="outline-container-orgda176e9" class="outline-2">
<h2 id="orgda176e9"><span class="section-number-2">3</span> Measure of the noise induced by the Slip-Ring</h2>
<div class="outline-text-2" id="text-3">
<p>
The data and matlab files are accessible <a href="data/meas_slip_ring.zip">here</a>.
</p>
</div>
<div id="outline-container-org6be0417" class="outline-3">
<h3 id="org6be0417"><span class="section-number-3">3.1</span> Measurement Description</h3>
<div id="outline-container-org0c723ab" class="outline-3">
<h3 id="org0c723ab"><span class="section-number-3">3.1</span> Measurement Description</h3>
<div class="outline-text-3" id="text-3-1">
<p>
<b>Goal</b>:
@ -673,11 +673,25 @@ Second column: Slip-ring measure
<li><code>data_010</code>: Slip-Ring ON and omega=6rpm</li>
<li><code>data_011</code>: Slip-Ring ON and omega=60rpm</li>
</ul>
<div id="org7c8c12d" class="figure">
<p><img src="./img/VID_20190503_160831.gif" alt="VID_20190503_160831.gif" />
</p>
<p><span class="figure-number">Figure 6: </span>Slip-Ring rotating at 6rpm</p>
</div>
<div id="org507a4c4" class="figure">
<p><img src="./img/VID_20190503_161401.gif" alt="VID_20190503_161401.gif" />
</p>
<p><span class="figure-number">Figure 7: </span>Slip-Ring rotating at 60rpm</p>
</div>
</div>
</div>
<div id="outline-container-org894df46" class="outline-3">
<h3 id="org894df46"><span class="section-number-3">3.2</span> Load data</h3>
<div id="outline-container-orgb59af10" class="outline-3">
<h3 id="orgb59af10"><span class="section-number-3">3.2</span> Load data</h3>
<div class="outline-text-3" id="text-3-2">
<p>
We load the data of the z axis of two geophones.
@ -692,32 +706,32 @@ sr_60r = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="o
</div>
</div>
<div id="outline-container-orgfb5cd93" class="outline-3">
<h3 id="orgfb5cd93"><span class="section-number-3">3.3</span> Time Domain</h3>
<div id="outline-container-orgfa16ec5" class="outline-3">
<h3 id="orgfa16ec5"><span class="section-number-3">3.3</span> Time Domain</h3>
<div class="outline-text-3" id="text-3-3">
<p>
We plot the time domain data for the direct measurement (figure <a href="#orgcff48af">6</a>) and for the signal going through the slip-ring (figure <a href="#orgfbc52db">7</a>);
We plot the time domain data for the direct measurement (figure <a href="#orgf5bca83">8</a>) and for the signal going through the slip-ring (figure <a href="#org6570f49">9</a>);
</p>
<div id="orgcff48af" class="figure">
<div id="orgf5bca83" class="figure">
<p><img src="figs/sr_direct_time.png" alt="sr_direct_time.png" />
</p>
<p><span class="figure-number">Figure 6: </span>Direct measurement</p>
<p><span class="figure-number">Figure 8: </span>Direct measurement</p>
</div>
<div id="orgfbc52db" class="figure">
<div id="org6570f49" class="figure">
<p><img src="figs/sr_slipring_time.png" alt="sr_slipring_time.png" />
</p>
<p><span class="figure-number">Figure 7: </span>Measurement of the signal going through the Slip-Ring</p>
<p><span class="figure-number">Figure 9: </span>Measurement of the signal going through the Slip-Ring</p>
</div>
</div>
</div>
<div id="outline-container-orge70b1cd" class="outline-3">
<h3 id="orge70b1cd"><span class="section-number-3">3.4</span> Frequency Domain</h3>
<div id="outline-container-orge0c2b75" class="outline-3">
<h3 id="orge0c2b75"><span class="section-number-3">3.4</span> Frequency Domain</h3>
<div class="outline-text-3" id="text-3-4">
<p>
We first compute some parameters that will be used for the PSD computation.
@ -744,7 +758,7 @@ Then we compute the Power Spectral Density using <code>pwelch</code> function.
</div>
<p>
And we plot the ASD of the measured signals (figure <a href="#org16c9932">8</a>);
And we plot the ASD of the measured signals (figure <a href="#org1bfaa20">10</a>);
</p>
<div class="org-src-container">
@ -765,16 +779,16 @@ xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbo
</div>
<div id="org16c9932" class="figure">
<div id="org1bfaa20" class="figure">
<p><img src="figs/sr_psd_compare.png" alt="sr_psd_compare.png" />
</p>
<p><span class="figure-number">Figure 8: </span>Comparison of the ASD of the measured signals when the slip-ring is ON, OFF and turning</p>
<p><span class="figure-number">Figure 10: </span>Comparison of the ASD of the measured signals when the slip-ring is ON, OFF and turning</p>
</div>
</div>
</div>
<div id="outline-container-org1067ac0" class="outline-3">
<h3 id="org1067ac0"><span class="section-number-3">3.5</span> Conclusion</h3>
<div id="outline-container-org42e6a09" class="outline-3">
<h3 id="org42e6a09"><span class="section-number-3">3.5</span> Conclusion</h3>
<div class="outline-text-3" id="text-3-5">
<div class="important">
<p>
@ -786,16 +800,16 @@ xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbo
</div>
</div>
<div id="outline-container-orga6075e6" class="outline-2">
<h2 id="orga6075e6"><span class="section-number-2">4</span> Measure of the noise induced by the slip ring when using a geophone</h2>
<div id="outline-container-org2d68753" class="outline-2">
<h2 id="org2d68753"><span class="section-number-2">4</span> Measure of the noise induced by the slip ring when using a geophone</h2>
<div class="outline-text-2" id="text-4">
<p>
The data and matlab files are accessible <a href="data/meas_sr_geophone.zip">here</a>.
</p>
</div>
<div id="outline-container-orga3d1fca" class="outline-3">
<h3 id="orga3d1fca"><span class="section-number-3">4.1</span> Measurement Description</h3>
<div id="outline-container-org3d4e974" class="outline-3">
<h3 id="org3d4e974"><span class="section-number-3">4.1</span> Measurement Description</h3>
<div class="outline-text-3" id="text-4-1">
<p>
<b>Goal</b>:
@ -837,8 +851,8 @@ Second column: Slip-ring measure
</div>
</div>
<div id="outline-container-org874ef1d" class="outline-3">
<h3 id="org874ef1d"><span class="section-number-3">4.2</span> Load data</h3>
<div id="outline-container-org727e79c" class="outline-3">
<h3 id="org727e79c"><span class="section-number-3">4.2</span> Load data</h3>
<div class="outline-text-3" id="text-4-2">
<p>
We load the data of the z axis of two geophones.
@ -851,31 +865,31 @@ sr_on = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="o
</div>
</div>
<div id="outline-container-org3656f2f" class="outline-3">
<h3 id="org3656f2f"><span class="section-number-3">4.3</span> Time Domain</h3>
<div id="outline-container-orge2a10ee" class="outline-3">
<h3 id="orge2a10ee"><span class="section-number-3">4.3</span> Time Domain</h3>
<div class="outline-text-3" id="text-4-3">
<p>
We compare the signal when the Slip-Ring is OFF (figure <a href="#orge33756c">9</a>) and when it is ON (figure <a href="#orgb36b65d">10</a>).
We compare the signal when the Slip-Ring is OFF (figure <a href="#org098ac5b">11</a>) and when it is ON (figure <a href="#org2847280">12</a>).
</p>
<div id="orge33756c" class="figure">
<div id="org098ac5b" class="figure">
<p><img src="figs/sr_geophone_time_off.png" alt="sr_geophone_time_off.png" />
</p>
<p><span class="figure-number">Figure 9: </span>Comparison of the time domain signals when the slip-ring is OFF</p>
<p><span class="figure-number">Figure 11: </span>Comparison of the time domain signals when the slip-ring is OFF</p>
</div>
<div id="orgb36b65d" class="figure">
<div id="org2847280" class="figure">
<p><img src="figs/sr_geophone_time_on.png" alt="sr_geophone_time_on.png" />
</p>
<p><span class="figure-number">Figure 10: </span>Comparison of the time domain signals when the slip-ring is ON</p>
<p><span class="figure-number">Figure 12: </span>Comparison of the time domain signals when the slip-ring is ON</p>
</div>
</div>
</div>
<div id="outline-container-orgf3c9d01" class="outline-3">
<h3 id="orgf3c9d01"><span class="section-number-3">4.4</span> Frequency Domain</h3>
<div id="outline-container-org6939b54" class="outline-3">
<h3 id="org6939b54"><span class="section-number-3">4.4</span> Frequency Domain</h3>
<div class="outline-text-3" id="text-4-4">
<p>
We first compute some parameters that will be used for the PSD computation.
@ -924,23 +938,23 @@ xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbo
</div>
<div id="org574455b" class="figure">
<div id="org5b61df7" class="figure">
<p><img src="figs/sr_geophone_asd.png" alt="sr_geophone_asd.png" />
</p>
<p><span class="figure-number">Figure 11: </span>Comparison of the Amplitude Spectral Sensity</p>
<p><span class="figure-number">Figure 13: </span>Comparison of the Amplitude Spectral Sensity</p>
</div>
<div id="org7c2558c" class="figure">
<div id="org0d244aa" class="figure">
<p><img src="figs/sr_geophone_asd_zoom.png" alt="sr_geophone_asd_zoom.png" />
</p>
<p><span class="figure-number">Figure 12: </span>Comparison of the Amplitude Spectral Sensity - Zoom</p>
<p><span class="figure-number">Figure 14: </span>Comparison of the Amplitude Spectral Sensity - Zoom</p>
</div>
</div>
</div>
<div id="outline-container-orgbee8de0" class="outline-3">
<h3 id="orgbee8de0"><span class="section-number-3">4.5</span> Conclusion</h3>
<div id="outline-container-org05104a8" class="outline-3">
<h3 id="org05104a8"><span class="section-number-3">4.5</span> Conclusion</h3>
<div class="outline-text-3" id="text-4-5">
<div class="important">
<ul class="org-ul">
@ -953,16 +967,16 @@ xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbo
</div>
</div>
<div id="outline-container-org22d6637" class="outline-2">
<h2 id="org22d6637"><span class="section-number-2">5</span> Measure of the influence of the AC/DC option on the voltage amplifiers</h2>
<div id="outline-container-org4f273de" class="outline-2">
<h2 id="org4f273de"><span class="section-number-2">5</span> Measure of the influence of the AC/DC option on the voltage amplifiers</h2>
<div class="outline-text-2" id="text-5">
<p>
The data and matlab files are accessible <a href="data/meas_noise_ac_dc.zip">here</a>.
</p>
</div>
<div id="outline-container-org947094c" class="outline-3">
<h3 id="org947094c"><span class="section-number-3">5.1</span> Measurement Description</h3>
<div id="outline-container-orgbdff313" class="outline-3">
<h3 id="orgbdff313"><span class="section-number-3">5.1</span> Measurement Description</h3>
<div class="outline-text-3" id="text-5-1">
<p>
<b>Goal</b>:
@ -1050,11 +1064,18 @@ Second measurement (<code>mat/data_015.mat</code> file):
</tr>
</tbody>
</table>
<div id="orgff33e23" class="figure">
<p><img src="./img/IMG_20190503_170936.jpg" alt="IMG_20190503_170936.jpg" width="500px" />
</p>
<p><span class="figure-number">Figure 15: </span>Picture of the two voltages amplifiers</p>
</div>
</div>
</div>
<div id="outline-container-orgd3f6cb3" class="outline-3">
<h3 id="orgd3f6cb3"><span class="section-number-3">5.2</span> Load data</h3>
<div id="outline-container-org002ef0d" class="outline-3">
<h3 id="org002ef0d"><span class="section-number-3">5.2</span> Load data</h3>
<div class="outline-text-3" id="text-5-2">
<p>
We load the data of the z axis of two geophones.
@ -1067,23 +1088,23 @@ meas15 = load<span class="org-rainbow-delimiters-depth-1">(</span><span class="o
</div>
</div>
<div id="outline-container-org85a856a" class="outline-3">
<h3 id="org85a856a"><span class="section-number-3">5.3</span> Time Domain</h3>
<div id="outline-container-orgf18b42c" class="outline-3">
<h3 id="orgf18b42c"><span class="section-number-3">5.3</span> Time Domain</h3>
<div class="outline-text-3" id="text-5-3">
<p>
The signals are shown on figure <a href="#org5f9a2bc">13</a>.
The signals are shown on figure <a href="#orge57d23e">16</a>.
</p>
<div id="org5f9a2bc" class="figure">
<div id="orge57d23e" class="figure">
<p><img src="figs/ac_dc_option_time.png" alt="ac_dc_option_time.png" />
</p>
<p><span class="figure-number">Figure 13: </span>Comparison of the signals going through the Voltage amplifiers</p>
<p><span class="figure-number">Figure 16: </span>Comparison of the signals going through the Voltage amplifiers</p>
</div>
</div>
</div>
<div id="outline-container-org18d9eca" class="outline-3">
<h3 id="org18d9eca"><span class="section-number-3">5.4</span> Frequency Domain</h3>
<div id="outline-container-org7ad219b" class="outline-3">
<h3 id="org7ad219b"><span class="section-number-3">5.4</span> Frequency Domain</h3>
<div class="outline-text-3" id="text-5-4">
<p>
We first compute some parameters that will be used for the PSD computation.
@ -1110,19 +1131,19 @@ Then we compute the Power Spectral Density using <code>pwelch</code> function.
</div>
<p>
The ASD of the signals are compare on figure <a href="#org86218d3">14</a>.
The ASD of the signals are compare on figure <a href="#org0650c5f">17</a>.
</p>
<div id="org86218d3" class="figure">
<div id="org0650c5f" class="figure">
<p><img src="figs/ac_dc_option_asd.png" alt="ac_dc_option_asd.png" />
</p>
<p><span class="figure-number">Figure 14: </span>Amplitude Spectral Density of the measured signals</p>
<p><span class="figure-number">Figure 17: </span>Amplitude Spectral Density of the measured signals</p>
</div>
</div>
</div>
<div id="outline-container-org21d0038" class="outline-3">
<h3 id="org21d0038"><span class="section-number-3">5.5</span> Conclusion</h3>
<div id="outline-container-org030a799" class="outline-3">
<h3 id="org030a799"><span class="section-number-3">5.5</span> Conclusion</h3>
<div class="outline-text-3" id="text-5-5">
<div class="important">
<p>
@ -1136,7 +1157,7 @@ The ASD of the signals are compare on figure <a href="#org86218d3">14</a>.
</div>
<div id="postamble" class="status">
<p class="author">Author: Thomas Dehaeze</p>
<p class="date">Created: 2019-05-06 lun. 10:28</p>
<p class="date">Created: 2019-05-06 lun. 14:16</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div>
</body>

13
slip-ring-test/index.org
View File

@ -325,6 +325,14 @@ Second column: Slip-ring measure
- =data_010=: Slip-Ring ON and omega=6rpm
- =data_011=: Slip-Ring ON and omega=60rpm
#+name: fig:setup_sr_6rpm
#+caption: Slip-Ring rotating at 6rpm
[[file:./img/VID_20190503_160831.gif]]
#+name: fig:setup_sr_60rpm
#+caption: Slip-Ring rotating at 60rpm
[[file:./img/VID_20190503_161401.gif]]
** Matlab Init :noexport:ignore:
#+begin_src matlab :exports none :results silent :noweb yes
<<matlab-init>>
@ -646,6 +654,11 @@ Second measurement (=mat/data_015.mat= file):
| 2 | Amplifier 2 with AC option |
| 3 | Time |
#+name: fig:volt_amp_setup
#+caption: Picture of the two voltages amplifiers
#+attr_html: :width 500px
[[file:./img/IMG_20190503_170936.jpg]]
** Matlab Init :noexport:ignore:
#+begin_src matlab :exports none :results silent :noweb yes
<<matlab-init>>