EPS@ISEP | The European Project Semester (EPS) at ISEP

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report [2018/06/25 17:05] – [7.3 Components Product] team4report [2018/06/27 16:06] (current) – [7.6 Tests and Results] team4
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 ^  Target Audience  ^^^^^^^ ^  Target Audience  ^^^^^^^
 |  1.1  |  R  |  H  |  Shader needs to be built for people at home. A structure that can rest on a terrace  |  |  |  16th of March  | |  1.1  |  R  |  H  |  Shader needs to be built for people at home. A structure that can rest on a terrace  |  |  |  16th of March  |
-|  1.2  |  R  |  M  |  The shader must fit a table for eight people ( 2500x110 )  |  |  |  16th of March  |+|  1.2  |  R  |  M  |  The shader must fit a table for eight people ( 2500x110 mm )  |  |  |  16th of March  |
 |  1.3  |  R  |  M  |  The users need to be able to walk around the table within the measurements of the shader with, at least, 70 mm  |  |  Dined Table  |  16th of March | |  1.3  |  R  |  M  |  The users need to be able to walk around the table within the measurements of the shader with, at least, 70 mm  |  |  Dined Table  |  16th of March |
 |  1.4  |  R  |  H  |  Shader must fit a full grown adult man ( Shader height at least 2300 mm )  |  Construction Bow  |  |  16th of March  | |  1.4  |  R  |  H  |  Shader must fit a full grown adult man ( Shader height at least 2300 mm )  |  Construction Bow  |  |  16th of March  |
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   * Part use    * Part use 
   * Part material    * Part material 
-  * Part strenght+  * Part strength
  
 === Outdoor intelligent shader (head assembly)=== === Outdoor intelligent shader (head assembly)===
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 To choose the right material for its purpose the program that’s called CES Edupack is used. This program helps to funnel the materials to a small group of materials to choose from. The understanding information shows the limits we put up to choose the material: To choose the right material for its purpose the program that’s called CES Edupack is used. This program helps to funnel the materials to a small group of materials to choose from. The understanding information shows the limits we put up to choose the material:
   * Material in ‘Bulk Form’   * Material in ‘Bulk Form’
-  * Price of 2 €/Kg+  * Price of 2 €/kg
   * Recyclable    * Recyclable 
   * Only Metals and alloys   * Only Metals and alloys
   * Hot metal extrusion as shaping process (because of the hollow square form)   * Hot metal extrusion as shaping process (because of the hollow square form)
-  * Graphic that shows Young’s modules (GPa vs. Price (€/Kg)+  * Graphic that shows Young’s modules (GPa vs. Price (€/kg)
  
 Now we set all the different limits the next step is to look at the graphic. In the image shown below there are only a couple colored dots. These dots are the only left over materials that can be used for our product (from 3986 to 552 materials).  Now we set all the different limits the next step is to look at the graphic. In the image shown below there are only a couple colored dots. These dots are the only left over materials that can be used for our product (from 3986 to 552 materials). 
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 <WRAP centeralign> <WRAP centeralign>
 <figure Electsche> <figure Electsche>
-{{ :electrical_schematics_1_esquema.png?nolink&600 |}}+{{ :36391988_2102571203105495_112453887465619456_n.png?nolink&800 |}}
 <caption>Electrical Schematics</caption> <caption>Electrical Schematics</caption>
 </figure> </figure>
 </WRAP> </WRAP>
  
-**Figure** {{ref>Electsche}} shows the electronics and presents a 12V power supply connected to the H bridge module, that is there to assure the motor rotates for both sides.The H Bridge then is providing power to the Arduino microprocessor, and is connected to the motor and 3 digital PWM entries on the Arduino. The connection done with enable entry in the H bridge has an emergency switch with a pull down resistor. +**Figure** {{ref>Electsche}} shows the electronics and presents a 12 V power supply connected to the H bridge module, that is there to assure the motor rotates for both sides.The H Bridge then is providing power to the Arduino microprocessor, and is connected to the motor and 3 digital PWM entries on the Arduino. The connection done with enable entry in the H bridge has an emergency switch with a pull down resistor. 
-We have then a RTC real time clock, is there to provide the time to read the algorithm wrote with the solar positions, the power supply is a 3V battery, and is connected to the Arduino by 3 analog entries. +We have then a RTC real time clock, is there to provide the time to read the algorithm wrote with the solar positions, the power supply is a 3 V battery, and is connected to the Arduino by 3 analog entries. 
-We use 2 sensors to define the zero-point, also known as the cloth original position. Each sensor is connected to an analog entry. The power for this modules is provided by the 5V output of Arduino. +We use 2 sensors to define the zero-point, also known as the cloth original position. Each sensor is connected to an analog entry. The power for this modules is provided by the 5 V output of Arduino. 
-For last, we have bluetooth receiver, this bluetooth receiver has the function of receive the orders from the app blynk, to control the system, overriding the algorithm order. The power is supplied by a logic level translator, that is there because the bluetooth devices works on a difference logic level than the rest of the system. This logic level translator is connected to the Arduino by 2 analog entries, and is connected as well with the 5V and 3V3 outputs, to do the level translation. The Bluetooth device is then connected to the respective entry in the logic level translator.+For last, we have bluetooth receiver, this bluetooth receiver has the function of receive the orders from the app blynk, to control the system, overriding the algorithm order. The power is supplied by a logic level translator, that is there because the bluetooth devices works on a difference logic level than the rest of the system. This logic level translator is connected to the Arduino by 2 analog entries, and is connected as well with the 5 V and 3 V 3 outputs, to do the level translation. The Bluetooth device is then connected to the respective entry in the logic level translator.
  
  
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 <WRAP centeralign> <WRAP centeralign>
 <figure prototype> <figure prototype>
-{{ :flowchart_algorithm.png?nolink&1000 |}} +{{ :algorithm_chart123.png?nolink&800 |}}
-<caption>Flowchart of the algorithm</caption>+
 </figure> </figure>
 </WRAP> </WRAP>
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- +After plugging in the SetSun shader the system will calculate where the cloth part of the shader should move to over the structure based on the time of day and the physical placement of the SetSun in the world. The NREL's Solar Position Algorithm (SPA) calculates the position of the sun given the correct time of day (provided by the RTC) and by the correct position of the SetSun shader (inputted as latitude and longitude by team member at time of programming) at this point the controller, after receiving this information, then sends a signal to the motor in order to position the shader in the correct place.
-After plugging in the SetSun shader the system will calculate where the cloth part of the shader should move to over the structure based on the time of day and the physical placement of the SetSun in the world. The NREL's Solar Position Algorithm (SPA) calculates the position of the sun given the correct time of day which is given by the Real Time Clock and by the correct position of the SetSun shader (inputted as latitude and longitude by team member at time of programming) at this point the controller, after receiving this information, then sends a signal to the motor in order to position the shader in the correct place.+
  
 The time of day is provided to the system by the Real Time Clock that is connected up to the Arduino and whilst this continuously updates throughout the day and even if the SETSUN is unplugged or moved at any point there is a backup battery plugged into the Real Time Clock to keep accurate time in the system. The time of day is provided to the system by the Real Time Clock that is connected up to the Arduino and whilst this continuously updates throughout the day and even if the SETSUN is unplugged or moved at any point there is a backup battery plugged into the Real Time Clock to keep accurate time in the system.
 +The placement of the cloth over the structure is determined by; the location of the structure in the world (which country/city/time-zone it is in) and also, which position the sun would be in above the given country/city depending on the time of year or time of day. This information is provided by the algorithm that will be uploaded to our prototype/product by our team. Each day when the sun is rising, the algorithm informs the system as to which position the cloth section of the shader should be in and in turn sends a signal to the motor to rotate for a certain amount of time to move the cloth into the correct position in order to shade the people sitting underneath it. After a relevant portion of time has passed and the code has calculated a new position of the sun the controller will again instruct the motor to move for a set time to move the shader to a new position. This process will repeat a few times throughout the day to provide continuous shade to the user’s underneath. At the end of its cycle, the motor will be signalled to move the cloth back to the top of the structure and return to its zero-point. This means that when the shader is instructed to move the following day it needs only to move the same amount of time as it did the previous day as, due to the sensors recognising the cloth has moved back to its original position. This reduces the risk of the shader being in a place it is not supposed to be in.
  
-The placement of the cloth over the structure is determined by; the location of the structure in the world (which country/city/time-zone it is in) and also, which position the sun would be in above the given country/city depending on the time of year or time of day.  +At the end of the day, as mentioned previously, the team place in the code an instruction that informs the motor to turn in the correct direction until the cloth returns back to its zero-point (where the sensors meet) throughout the night and wait until the next day to begin again. The proximity sensors which reside in the top corners of the structure are there to ensure that when the cloth moves to its default position at night both proximity sensors are activated and the motor stops turning and the cloth stops moving until the next day when it starts up and moves to the first position at the beginning of the sunrise.
-This information is provided by the algorithm that will be uploaded to our prototype/product by our team.  +
-Each day when the sun is rising, the algorithm informs the system as to which position the cloth section of the shader should be in and in turn sends a signal to the motor to spin for a certain amount of time to move the cloth into the correct position in order to shade the people sitting underneath it. After a relevant portion of time has passed and the code has calculated a new position of the sun the controller will again instruct the motor to move for a set time to move the shader to a new position. This process will repeat a few times throughout the day to provide continuous shade to the user’s underneath. +
- +
-At the end of the day we place in the code an instruction that informs the motor to turn in the correct direction until the cloth returns back to its zero-point (where the sensors meet) throughout the night and wait until the next day to begin again. The proximity sensors which reside in the top corners of the structure are there to ensure that when the cloth moves to its default position at night both proximity sensors are activated and the motor stops turning and the cloth stops moving until the next day when it starts up and moves to the first position at the beginning of the sunrise.+
  
 ==== - Tests and Results ==== ==== - Tests and Results ====
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 **APP REPOSITIONING:** To test the app repositioning, it is important to check if the app code is well written and the chosen device is well connected to the Bluetooth receiver. It is expected the values provided by the app will override the algorithm values and so the canvas will move accordingly to the values provided by the app. **APP REPOSITIONING:** To test the app repositioning, it is important to check if the app code is well written and the chosen device is well connected to the Bluetooth receiver. It is expected the values provided by the app will override the algorithm values and so the canvas will move accordingly to the values provided by the app.
 +
 +Each individual part of the sun positioning algorithm work independently but when all parts of the code were placed together the code did not work as initially expected. The team were unable to rectify this problem due to finding out this problem very late on in the testing phase and a lack of specialised knowledge in the field to be able to ensure it would work.
  
 ==== - Conclusion ==== ==== - Conclusion ====

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