lot of measurements

This commit is contained in:
Thomas Dehaeze 2019-05-03 17:07:22 +02:00
parent f7b4a29c96
commit c56271c261
16 changed files with 101 additions and 33 deletions

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* ELMO
tutorials: https://www.elmomc.com/products/application-studio/easii/easii-tutorials/

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62
slip-ring-test/readme.org Normal file
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* 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

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%%
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');

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Ts = 1e-3; % [s]
%%
% tg = slrt;

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