Week 13
Introduction
For the lesson in week 13, we learned about operating principles and mechanism designs. Operating designs are essentially all about How Things Work. Mechanical, electrical, chemical, and magnetic functioning principles are used to design all devices, apparatus, and equipment.
There are many examples of operating designs. For starters, the most basic and everyday need is coffee. How is a cup of coffee made? Hot water is introduced to the coffee beans and then it leaches the soluble solute from the coffee beans, making coffee solution or coffee.
Our Chemical Product Operating Principle
Our chemical product principle is based on the transfer of heat through conduction and convection. The water at the bottom gets heated up by the heating source at the bottom of the heater by conduction. As the water at the bottom heats up, it expands and thus becomes less dense. As the water at the bottom becomes less dense, it rises as the cooler water at the top sinks because it is denser. This process then repeats creating a convection current.
Mechanisms
Next, we learnt about the 6 different types of essential mechanisms in functional prototypes. Without these mechanisms, the product or prototype may be unable to function well or even start up at all.
They are listed as follow:
Actuators, Cams, Gears, Lever, Ratchets, Springs,
Actuators can convert stored energy into motion. The stored energy is usually in the form of compressed air , electrical potential, or liquid pressure.
Cams are devices that convert a shaft's rotation into simple or complex reciprocating linear motion.
Gears are used to transmit torque and control rotational velocity.
Levers transmit and amplify force by fixing the input and output about a fulcrum or pivot point.
Ratchets can only lock in one direction, so they can tighten without danger of "going backwards."
Springs store and dissipate energy.
Activity: Ping Pong Launcher
With the knowledge that we have equipped, we were then tasked to create a ping-pong ball launcher that can retain at least five balls and drive them forward using stored energy, utilizing at least one of the techniques that was listed above.
For the lesson in week 13, we learned about operating principles and mechanism designs. Operating designs are essentially all about How Things Work. Mechanical, electrical, chemical, and magnetic functioning principles are used to design all devices, apparatus, and equipment.
There are many examples of operating designs. For starters, the most basic and everyday need is coffee. How is a cup of coffee made? Hot water is introduced to the coffee beans and then it leaches the soluble solute from the coffee beans, making coffee solution or coffee.
Our Chemical Product Operating Principle
Our chemical product principle is based on the transfer of heat through conduction and convection. The water at the bottom gets heated up by the heating source at the bottom of the heater by conduction. As the water at the bottom heats up, it expands and thus becomes less dense. As the water at the bottom becomes less dense, it rises as the cooler water at the top sinks because it is denser. This process then repeats creating a convection current.
Mechanisms
Next, we learnt about the 6 different types of essential mechanisms in functional prototypes. Without these mechanisms, the product or prototype may be unable to function well or even start up at all.
They are listed as follow:
Actuators, Cams, Gears, Lever, Ratchets, Springs,
Actuators can convert stored energy into motion. The stored energy is usually in the form of compressed air , electrical potential, or liquid pressure.
Cams are devices that convert a shaft's rotation into simple or complex reciprocating linear motion.
Gears are used to transmit torque and control rotational velocity.
Levers transmit and amplify force by fixing the input and output about a fulcrum or pivot point.
Ratchets can only lock in one direction, so they can tighten without danger of "going backwards."
Springs store and dissipate energy.
Activity: Ping Pong Launcher
With the knowledge that we have equipped, we were then tasked to create a ping-pong ball launcher that can retain at least five balls and drive them forward using stored energy, utilizing at least one of the techniques that was listed above.
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