CAES1507 Professional and Technical Written Communication for Engineers. Session Six Theory and Design. Feedback on Introduction. The background has to be adequate to justify the prototype invention Be sure the information about the request for the project is correct
Theory and Design
The simple for Engineerslaw of gravity maintains the mousetrap in a state of rest until a mouse enters the system introducing an external force that activates it. When the mouse enters the trap, it creates a force on the system due to its weight. The force puts tension on the wire activating the other parts connected to it. See Figure 1.
A general description of the overarching theory used
Explanation of theorywith specific referenceto the prototype
Refer to diagramExample – What information is included?
The fixed pulley in the prototype mousetrap is used to change the direction of tension in the strings. The pulley is used so that the tension of the string can be transferred from one part to another even if the string is bent or twisted.
A prototype also uses a simple lever system requiring a pivot point as shown in Figure 1.
Explanation of functions of specific parts using Engineering principles
Other relevant engineering principleExample – What information is included?
Name of the major part
Function of the major part
Function of smaller parts
Specifications of smaller parts
The overall design of the mousetrap (figure 1) can be divided into three main parts, the base, the light box and the side track.The following sections illustrate the overall and completed design including the structure and function of each part.
General Introduction of the design – the components of the prototype
Signposting – i.e what will be included in the following sectionsAn Example
The base in the main body of mousetrap. This is where the mouse enters and is trapped. The bottom of the base is a movable platform which is used to activate the whole system.
Introduction of the component partAn Example
On the two side walls, there is a wooden stick settled in a track on each side and connected to the platform by plastic string. The wooden sticks are used to lock and unlock the gate in front. The gate is a sliding section which covers one side of the base. When it is released it slides down to enclose the mouse completely in the box. On the left hand side wall, a little box which has an inclined bottom and a hole on one side is attached.
Fairly general description of the structure and mechanism
Structure of the part
Function of the partAn Example
This box is used to trap a marble and the marble is trapped by another wooden stick which is also connected to the platform by wire. Two plastic wires are connected to the platform and then to the light box. The structure of the base and the inner mechanism of the base are shown in Figures 2 and 3.
Always refer to relevant diagrams
Present Tense is usedAn Example
Is made up of + people/materials
Is made of +materials
Is made by +people