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Delete V2_00_step_02 - Copie.rst

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**STEP n°2**: Assembly of the measurement board
****************************************************
+----------------------------------------------------+
| **Required components** |
+----------------------------------------------------+
.. figure:: step_n_2/00_mes_board_components.jpg
:width: 600px
:align: center
:height: 450px
:alt: alternate text
:figclass: align-center
.. csv-table:: List of components
:file: C:\Users\remi.clement\Documents\28_ohmpi_all_git\master2\sphinx\source\step_n_2\Mesure_board_list_2_xx.csv
:widths: 30, 70, 70, 70, 70, 35, 35
:header-rows: 1
Description
==========================================
.. figure:: schema_measurement_board.jpg
:width: 600px
:align: center
:height: 450px
:alt: alternate text
:figclass: align-center
Figure shows the general schematics for the electronic measurement board developed.
We have developed a complete "plug and play" measurement board. To measure electrical resistivity with Raspberry Pi.
two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115
is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the
input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component,
which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps:
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/01_mes_board.jpg |
| 1 +------------------------------------------------------------+
| | Installation of female header, 1 by10 pins, for ADS1115 |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/02_mes_board.jpg |
|2 +------------------------------------------------------------+
| | Soldering of 4 dual-in-line- socket (2 by 2 pins) for |
| | optical relay, AQY211EH. |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/03_mes_board.jpg |
|3 +------------------------------------------------------------+
| | Soldering of 1 dual-in-line- socket (2 by 9 pins) |
| | for INA282. |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/04_mes_board.jpg |
| 4 +------------------------------------------------------------+
| | Soldering of 1 dual-in-line- socket (2 by 4 pins) |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/05_mes_board.jpg |
|5 +------------------------------------------------------------+
| | Soldering of 2 dual-in-line- socket (2 by 4 pins) |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/06_mes_board.jpg |
| 6 +------------------------------------------------------------+
| | Traco Power Supply 12V to 5V, TDH15 - 1211N |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/07_mes_board.jpg |
|7 +------------------------------------------------------------+
| | Four screw terminals for 12V inpout et 5V outpout |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/08_mes_board.jpg |
|8 +------------------------------------------------------------+
| | Traco power Supply 12V to 24V, TRN-1215 |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_2/09_mes_board.jpg |
|9 +------------------------------------------------------------+
| | Two screw terminals electrodes M and N |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/10_mes_board.jpg |
|10 +------------------------------------------------------------+
| | Four screw terminals, for 12V power supply and for |
| | electrodes A and B |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/11_mes_board.jpg |
|11 +------------------------------------------------------------+
| | Soldering three capacitors (100nF) |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/12_mes_board.jpg |
| 12 +------------------------------------------------------------+
| | 2 ohms shunt resistor pre-adjustment |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/13_mes_board.jpg |
|13 +------------------------------------------------------------+
| | Soldering 2 ohms shunt resistor |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/14_mes_board.jpg |
|14 +------------------------------------------------------------+
| | 1 Mohms resistors |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/15_mes_board.jpg |
|15 +------------------------------------------------------------+
| | Soldering tow 1 Kohms resistors |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/16_mes_board.jpg |
|16 +------------------------------------------------------------+
| | Soldering tow 1.5Kohms resistors |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/17_mes_board.jpg |
|17 +------------------------------------------------------------+
| | Soldering tow 1.5Kohms resistors |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/18_mes_board.jpg |
|18 +------------------------------------------------------------+
| | Female header 2 by 20 pins for Raspberry Pi connection |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/19_mes_board.jpg |
|19 +------------------------------------------------------------+
| | View of the female header 2 by 20 pins installation |
| | for Raspberry Pi connection |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/20_mes_board.jpg |
|20 +------------------------------------------------------------+
| | Fixing MCP23008 component |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/21_mes_board.jpg |
|21 +------------------------------------------------------------+
| |Mounting optical relay, AQY211EH |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/22_mes_board.jpg |
|22 +------------------------------------------------------------+
| | Mounting LM158 operational amplificator |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/23_mes_board.jpg |
|23 +------------------------------------------------------------+
| | Mounting ADS115 board |
| | |
+---------+------------------------------------------------------------+
.. table::
:align: center
+---------+------------------------------------------------------------+
| | .. image:: step_n_2/24_mes_board.jpg |
|24 +------------------------------------------------------------+
| | Fixing the INA282 |
| | |
+---------+------------------------------------------------------------+
**STEP n°3**: Start-up of the measurement board.
****************************************************
+------------------------------------------------------------------------+
| **Required components** |
+------------------------------------------------------------------------+
.. csv-table:: List of components
:file: C:\Users\remi.clement\Documents\28_ohmpi_all_git\master2\sphinx\source\step_n_3\test_2_xx.csv
:widths: 30, 70, 70, 70, 70, 35, 35
:header-rows: 1
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_3/001.jpg |
|1 +------------------------------------------------------------+
| | Shutdown the raspberry Pi and unplug the power supply |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+--------------------------------------------------------------------------+
| | .. image:: step_n_3/001.jpg |
|2 +--------------------------------------------------------------------------+
| | Mounting the bottom spacers on the Raspberry Pi (male/female, 11mm, M3) |
| | |
+--------+--------------------------------------------------------------------------+
.. table::
:align: center
+--------+--------------------------------------------------------------------------+
| | .. image:: step_n_3/002.jpg |
|3 +--------------------------------------------------------------------------+
| | Mounting the upper spacers on the Raspberry Pi (female/female, 11mm, M3) |
| | |
+--------+--------------------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_3/003.jpg |
|4 +------------------------------------------------------------+
| | Mounting the Ohmpi's measurement board on the Raspberry Pi |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_3/004.jpg |
|5 +------------------------------------------------------------+
| | Mounting the Ohmpi's measurement board on the Raspberry Pi |
| | |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_3/005.jpg |
|6 +------------------------------------------------------------+
| | Plug the power supply into a socket and connect it to your |
| | Raspberry Pi's power port. |
+--------+------------------------------------------------------------+
**STEP n°4**: Measurement board validation
****************************************************
Run the terminal, and write
.. code-block:: python
i2cdetect -y 1
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/i2cdetect.png |
|1 +------------------------------------------------------------+
| |If everything is working, three I2C addresses should appear |
| |on the screen. |
+--------+------------------------------------------------------------+
Setting up an equivalent electronic circuit, for this you will need:
* 4 1kohm resistor (R2)
* 1 220 ohm resistor (R1)
* 1 small padboard
* Spool of solder
.. table::
:align: left
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/ref_circuit.png |
|2 +------------------------------------------------------------+
| | Schematic of equivalent electronic circuit test |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/20210905_122820.jpg |
|3 +------------------------------------------------------------+
| | Préparer le circuit équivalent |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/20210905_123034.jpg |
|4 +------------------------------------------------------------+
| | Préparer les cables de connexion aux batterie et les cosses|
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/20210905_132856.jpg |
|5 +------------------------------------------------------------+
| | Souder les câbles et les cosses |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/20210905_210045.jpg |
|6 +------------------------------------------------------------+
| | Installer les cables rouges sur la borne +12V et cable noir|
| | sur la borne ground. |
+--------+------------------------------------------------------------+
.. table::
:align: center
+--------+------------------------------------------------------------+
| | .. image:: step_n_4/20210905_210045.jpg |
|7 +------------------------------------------------------------+
| | Installer le circuit de référence |
| | |
+--------+------------------------------------------------------------+
Run the Thonny IDE and load the code Ohmpy4elec.pi
**STEP n°5**: Assembly of the MUX board
****************************************************
**STEP n°6**: Check Mux Board
****************************************************
**STEP n°7**: Assemble Ohmpi
****************************************************
**STEP n°8**: Boxing Ohmpi
****************************************************
**STEP n°9**: Field measurement
****************************************************
\ No newline at end of file
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