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| report [2024/06/25 18:23] – [7.3.1 Structure] team5 | report [2024/06/25 22:21] (current) – [7.3.1 Structure] team5 |
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| The main interest of the chosen game is to smash as many buttons as possible challenging the players to test their agility and reflexes. Many games have already been developed following this pattern but the most well-known would be the Whack-a-mole arcade game shown in Figure {{ref>flabel6}}. Players use a mallet or hammer to hit toy moles that randomly pop up from different holes. The objective is to hit as many moles as possible within a limited time frame. As the game progresses, the speed at which the moles pop up increases, challenging the player's reflexes and coordination. Whack-a-Mole is often enjoyed for its simple yet engaging gameplay and is commonly found in amusement arcades and entertainment venues [(hasbro)]. | The main interest of the chosen game is to smash as many buttons as possible, challenging the players to test their agility and reflexes. Many games have already been developed following this pattern but the most well-known would be the Whack-a-mole arcade game shown in Figure {{ref>flabel6}}. Players use a mallet or hammer to hit toy moles that randomly pop up from different holes. The objective is to hit as many moles as possible within a limited time frame. As the game progresses, the speed at which the moles pop up increases, challenging the player's reflexes and coordination. Whack-a-Mole is often enjoyed for its simple yet engaging gameplay and is commonly found in amusement arcades and entertainment venues [(hasbro)]. |
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| This classic game has also been adapted for home usage in various forms. Manufacturers have created miniaturized versions of the game that are suitable for tabletop play Figure {{ref>flabel7}} or even handheld electronic devices. Additionally, digital versions of Whack-a-Mole are available as mobile apps or video game console downloads, allowing users to enjoy the game from the comfort of their own homes. These adaptations often retain the core mechanics of the original game, providing players with a similar experience to the arcade version. | This classic game has also been adapted for home usage in various forms. Manufacturers have created miniaturized versions of the game that are suitable for tabletop play (Figure {{ref>flabel7}}) or even handheld electronic devices. Additionally, digital versions of Whack-a-Mole are available as mobile apps or video game console downloads, allowing users to enjoy the game from the comfort of their own homes. These adaptations often retain the core mechanics of the original game, providing players with a similar experience to the arcade version. |
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| <caption>Locking mechanism, inside view</caption> | <caption>Locking mechanism, inside view</caption> |
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| | The following Figure {{ref>flabel119}} displays an exploded view of the simplified structure of SMASHY, to deliver a better idea about its components and subassemblies. In Figure {{ref>flabel120}} those parts and subassemblies are put in order regarding their position in the exploded view and equipped with numbers, giving information about the certain assemblies. The quantity of parts is given aswell, but not all components are included, as this only serves to give a better idea about the individual parts and subassembly of the structure. |
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| | <figure flabel119> |
| | {{ ::cad_module_exploded_pic_nummeriert.png?direct&400 |}} |
| | <caption>Numbered exploded view</caption> |
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| | {{ ::parts_list_smashy-2.png?direct&1200|}} |
| | <figure flabel120> |
| | <caption>Parts list of structure</caption> |
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| Used fix points are the rubber-rings that have contact with the traffic light pole, as well as the vertical component of the triangles which are strapped on, as displayed in Figure {{ref>flabel11}} below. This can be done, because the strap generates sufficient friction to hold those parts in place with the simulated loads applied. For the simulation, the ratchet straps and outer rubber-rings were removed as shown. | Used fix points are the rubber-rings that have contact with the traffic light pole, as well as the vertical component of the triangles which are strapped on, as displayed in Figure {{ref>flabel11}} below. This can be done, because the strap generates sufficient friction to hold those parts in place with the simulated loads applied. For the simulation, the ratchet straps and outer rubber-rings were removed as shown. |
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| The forces that were applied in the simulations are 1000 N from the top, a torque of 500 Nm applied around the vertical axis in the center and a force of 350N in each of the three button positions that were selected. This equals a person standing on top of the module with his bodyweight evenly distributed, another or multiple persons hitting 3 buttons at the same time with a lot of power and someone pulling it back on the side, also with a force equal to his complete weight. These 3 buttons were selected as they display the region with the biggest risk of high displacement and stress, regarding their position relative to the framework. | The forces that were applied in the simulations are 1000 N from the top, a torque of 500 Nm applied around the vertical axis in the center and a force of 350 N in each of the three button positions that were selected. This equals a person standing on top of the module with his bodyweight evenly distributed, another or multiple persons hitting 3 buttons at the same time with a lot of power and someone pulling it back on the side, also with a force equal to his complete weight. These 3 buttons were selected as they display the region with the biggest risk of high displacement and stress, regarding their position relative to the framework. |
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| The simulations were also performed with each load only by itself, aswell as in combinations with multiple loads at the same time as it’s possible that they influence themselves and result in a decrease of displacement or stress. In the following, the highest simulated deformations and stresses that resulted are presented, which occurs with all loads applied simultaneously. | The simulations were also performed with each load only by itself, aswell as in combinations with multiple loads at the same time as it’s possible that they influence themselves and result in a decrease of displacement or stress. In the following, the highest simulated deformations and stresses that resulted are presented, which occurs with all loads applied simultaneously. |
| As to be seen in the simulation shown in Figure {{ref>flabel12}}, the maximum stress does not surpass 15.02 N/mm^2 , which applies to the annotated point. The main internal structure is made of stainless steel with a yield strength of 172.34 N/mm^2. This shows that it's going to withstand the applied forces with a high factor of safety (Figure {{ref>flabel13}}). | As to be seen in the simulation shown in Figure {{ref>flabel12}}, the maximum stress does not surpass 15.02 N/mm^2 , which applies to the annotated point. The main internal structure is made of stainless steel with a yield strength of 172.34 N/mm^2. This shows that it's going to withstand the applied forces with a high factor of safety (Figure {{ref>flabel13}}). |
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| In Figure {{ref>flabel14}}, the maximum displacement is visible, which occurs on the side of the HDPE plate, equaling 0.4909mm. Regarding the fact that the forces in this simulation were applied to the edges where the buttons sit, a lower displacement can be expected in the actual model. This is because the force will be applied on the button and then to a rubber ring, which distributes the force of hitting the button on to a bigger surface area. Therefore this displacement is still acceptable. | In Figure {{ref>flabel14}}, the maximum displacement is visible, which occurs on the side of the HDPE plate, equaling 0.4909 mm. Regarding the fact that the forces in this simulation were applied to the edges where the buttons sit, a lower displacement can be expected in the actual model. This is because the force will be applied on the button and then to a rubber ring, which distributes the force of hitting the button on to a bigger surface area. Therefore this displacement is still acceptable. |
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| For the choice of microcontroller, the team has opted for the Raspberry Pi Pico W, because it has many pins which is convenient for connecting various sensors. This microcontroller also has the advantage of having WiFi and Bluetooth, allowing adjustments to the system as well as obtaining information from the system to be done remotely. | For the choice of microcontroller, the team has opted for the Raspberry Pi Pico W, as it has many pins which is convenient for connecting various sensors. This microcontroller also has the advantage of having WiFi and Bluetooth, allowing adjustments to the system as well as obtaining information from the system to be done remotely. |
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| The senors that will be used in SMASHY are shown in Table {{ref>tsensors}}, together with an explanation on what it is and why it will be used for the product. | The senors that will be used in SMASHY are shown in Table {{ref>tsensors}}, together with an explanation on what it is and why it will be used for the product. |
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| The module is in the open air and thus exposed to the sun and other natural influences, because of this the decision of the screen has to be well-considered. The possibilities are compared in Table {{ref>tdisplays}}. | The module is in the open air and thus exposed to the sun and other natural influences. Because of this the decision of the screen has to be well-considered. The possibilities are compared in Table {{ref>tdisplays}}. |
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| <table tdisplays> | <table tdisplays> |
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| == Electrical schematics == | == Electrical schematics == |
| At the start of the project, a general Blackbox was made as seen in Figure {{ref>flabelb1}}. Depending on the type of specific features of the module the exact components cannot be defined yet, for example the display may become an LED display, but other displays are not yet excluded. The display will show information to pedestrians across the street. For the __Buttons__ feedback is created with light after pressing a button which is why the different components are grouped. The needed sensors are temperature, humidity, ultrasonic, and an NFC reader/writer to collect data. These values will be processed by the module and displayed on the module. At the edge of the box there is a converter to convert the power used in the traffic light control system to the operating voltage the game will be played on. After the converter, it is connected to the power supply and the power grid. Also, a connection out of the box is the connection with the traffic light to communicate the state of the light. \\ | At the start of the project, a general Blackbox was developed as seen in Figure {{ref>flabelb1}}. Depending on the type of specific features of the module the exact components cannot be defined yet. For example the display may become an LED display, but other displays are not yet excluded. The display will show information to pedestrians across the street. For the Buttons, feedback is created with light after pressing a button which is why the different components are grouped. The needed sensors are temperature, humidity, ultrasonic, and an NFC reader/writer to collect data. These values will be processed by the module and displayed on the module. At the edge of the box there is a converter to convert the power used in the traffic light control system to the operating voltage the game will be played on. After the converter, it is connected to the power supply and the power grid. Also, a connection out of the box is the connection with the traffic light to communicate the state of the light. \\ |
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