lot of measurements

slip-ring-test/readme.org

@@ -0,0 +1,62 @@
+* Measure of the noise of the Voltage Amplifier
+- The two inputs (differential) of the voltage amplifier are shunted with 50Ohms
+- The AC/DC option of the Voltage amplifier is on AC
+- The low pass filter is set to 1hHz
+
+Measure: Second Column
+
+meas3: Ampli OFF
+meas4: Ampli ON 20dB
+meas5: Ampli ON 40dB
+meas6: Ampli ON 60dB
+meas7: Ampli ON 80dB
+
+* Measure of the noise induced by the Slip-Ring
+Setup:
+- 0V is generated by the DAC of the Speedgoat
+- Using a T, one part goes to ADC
+- the other part goes to the slip-ring 2 times and then to the ADC
+- Gain of the Voltage Amplifier: 80dB, AC, 1kHz
+- Everything is OFF
+
+We had some diffuculties to not have a lot of noise on the measurement.
+
+First column: Direct measure
+Second column: Slip-ring measure
+
+Measurements:
+- meas8: Slip-Ring OFF
+- meas9: Slip-Ring ON
+- meas10: Slip-Ring ON and omega=6rpm
+- meas11: Slip-Ring ON and omega=60rpm
+
+* Measure of the noise induced by the slip ring when using a geophone
+
+The geophone is located at the sample location
+The two Voltage amplifiers have the following settings:
+- AC
+- 60dB
+- 1kHz
+
+The signal from the geophone is split into two using a T-BNC.
+On part goes directly to the voltage amplifier and then to the ADC.
+The other part goes to the slip-ring=>voltage amplifier=>ADC.
+
+The other two cables that go through the slip ring have 50Ohms resistors at one end, the other end is open circuit.
+
+
+First column: Direct measure
+Second column: Slip-ring measure
+
+- meas12: Slip-Ring OFF
+- meas13: Slip-Ring ON
+
+* Measure of the influence of the AC/DC option on the voltage amplifiers
+
+One geophone is located on the marble.
+It's signal goes to two voltage amplifiers with a gain of 60dB.
+On voltage amplifier is on the AC option, the other on the DC option.
+
+- meas14
+
+

slip-ring-test/run_test.m

@@ -1,49 +1,52 @@
+%%
+Tsim = 100; % [s]
+
+%%
 tg = slrt;
 
 %% TODO - Build this application if updated
 
 %%
 if tg.Connected == "Yes"
+    if tg.Status == "running"
+        disp('Target is Running, Stopping...');
+        tg.stop;
+        while tg.Status == "running"
+            pause(1);
+        end
+        disp('Target is Stopped');
+    end
     if tg.Status == "stopped"
-        %% Load the application
+        disp('Load the Application');
         tg.load('slip_ring_test');
 
         %% Run the application
+        disp('Starting the Application');
         tg.start;
-        pause(10);
+        pause(Tsim);
         tg.stop;
-
-        %% Load the data
-        f = SimulinkRealTime.openFTP(tg);
-        cd(f, 'data/slip_ring_test/');
-        mget(f, 'data_001.dat', 'data');
-        close(f);
     end
 end
 
-data = SimulinkRealTime.utils.getFileScopeData('data/data_001.dat').data;
-
-size(data)
-
-t  = data(:, end);
-x1 = data(:, 1);
-x2 = data(:, 2);
-
-save('mat/data_002.mat', 't', 'x1', 'x2');
-
-%% Plot the data
-figure;
-hold on;
-plot(t, x1);
-plot(t, x2);
-hold off
-xlabel('Time [s]');
-ylabel('Voltage [V]');
+%%
+f = SimulinkRealTime.openFTP(tg);
+cd(f, 'data/slip_ring_test/');
+mget(f, 'data_001.dat', 'data');
+close(f);
 
 %%
-figure;
-hold on;
-plot(t, x1-x2);
-hold off
-xlabel('Time [s]');
-ylabel('Voltage [V]');
+data = SimulinkRealTime.utils.getFileScopeData('data/data_001.dat').data;
+
+%%
+n = 13;
+
+while isfile(['mat/data_', num2str(n, '%03d'), '.mat'])
+     disp('File exists.');
+     if input(['Are you sure you want to override the file ', 'mat/data_', ...
+            num2str(n, '%03d'), '.mat', ' ? [Y/n]']) == 'Y'
+         break;
+     end
+     n = input('What should be the measurement number?');
+end
+
+save(['mat/data_', num2str(n, '%03d'), '.mat'], 'data');

slip-ring-test/setup.m

@@ -1,4 +1,3 @@
-Ts = 1e-3; % [s]
 
 %%
 % tg = slrt;