tdehaeze/nass-micro-station-measurements
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Thomas Dehaeze
2020-04-27 11:35:57 +02:00
parent dbd4320349
commit 4838b6e026
56 changed files with 2156 additions and 2248 deletions
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3
slip-ring-electrical-noise/img/nohup.out
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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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slip-ring-electrical-noise/index.org
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@@ -29,6 +29,7 @@
#+PROPERTY: header-args:shell :eval no-export
:END:
* Introduction :ignore:
The noise induced by the slip-ring is measured when using geophones:
- Section [[sec:meas_slip_ring_geophone]]:
- A geophone located at the sample location is measured with its signal going directly to the ADC and going through the slip-ring
@@ -65,7 +66,6 @@ The noise induced by the slip-ring is measured when using geophones:
*Goal*:
The goal is to determine if some noise is added to a signal passing through the slip-ring.
*Setup*:
Two measurements are made with the control systems of all the stages turned OFF.

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slip-ring-electrical-noise/readme.org
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* DONE Measure of the noise of the Voltage Amplifier
CLOSED: [2019-05-06 lun. 09:00]
CLOSED: [2019-05-06 lun. 09:00]
- 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
@@ -13,7 +13,7 @@ meas6: Ampli ON 60dB
meas7: Ampli ON 80dB
* DONE Measure of the noise induced by the Slip-Ring
CLOSED: [2019-05-06 lun. 09:28]
CLOSED: [2019-05-06 lun. 09:28]
Setup:
- 0V is generated by the DAC of the Speedgoat
- Using a T, one part goes to ADC
@@ -33,7 +33,7 @@ Measurements:
- meas11: Slip-Ring ON and omega=60rpm
* DONE Measure of the noise induced by the slip ring when using a geophone
CLOSED: [2019-05-06 lun. 09:28]
CLOSED: [2019-05-06 lun. 09:28]
The geophone is located at the sample location
The two Voltage amplifiers have the following settings:
- AC
@@ -58,7 +58,7 @@ Redone the measurements with 1kHz additional low pass filter:
- meas17: Slip-Ring ON
* DONE Measure of the influence of the AC/DC option on the voltage amplifiers
CLOSED: [2019-05-06 lun. 09:28]
CLOSED: [2019-05-06 lun. 09:28]
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.