Transcript Design and Technology – Rain Gauge Project

Design and Technology – Thermometer Screen Project
Name___________
Date ___________
Build a Thermometer Screen........
Design and Technology – Thermometer Screen Project
Designing & Evaluating
Level 1
Level 2
•Evaluate the
process and
product,
identifying
where
improvements
have been made.
•Clarify ideas
using words,
labelled sketches
and models.
•Designs show how
the product will
function.
•Communicate a
range of ideas using
words, labelled
sketches and
models.
•Reflect on the
development of
design ideas.
•Identify what is
working well and
what could be
improved.
Targets.......
Level 3
•Clarify the ideas
using discussion,
drawing and
modelling.
•Use analysis of
products in the
development of
own products.
•Test Product.
•Evaluate it in the
situation it has to
function.
•Evaluate use
made of
information
Name_______________
Date________________
Level 4
Level 5
•Use models and
drawings to explore
and test designs.
•Discuss ideas with
user and develop
detailed criteria.
•Use research results
in final proposals.
•Evaluate the
effectiveness of
research.
•Evaluate product in
use and identify the
improvements
necessary.
•Use research to develop
ideas.
•Communicate ideas using a
variety of media.
•Explore other peoples
needs to develop realistic
designs.
•Select evaluation
techniques to show
performance of product in
use.
•Suggest some
modifications to improve
performance.
•Provide explanations that
clearly state why changes
were necessary.
I think I did particularly well on ..............................................................................
.................................................................................................................................
I need to improve on ..............................................................................................
.................................................................................................................................
Design and Technology – Thermometer Screen Project
My target level is..............
Introduction
In this project you will have the opportunity to design and make a prototype
Thermometer Screen. Before starting you will need to think about how a
Thermometer screen works. The current Met Office screens are based on an
original design by Thomas Stevenson (1818-1887) and rely on natural ventilation.
This design guide will help you through your design process. Sketch, draw, write
down in a neat fashion ideas and thoughts as you work though this guide. You
will need these notes to help you produce your final design presentation.
Situation: Measuring the temperature of the air isn't easy!
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Direct sunshine heats it, rain or snow can cool it.
It should not let water in but has to allow air from outside in , so waterproof but
not air tight!
It has to be able to give temperature reading s accurately, and regularly without
the need for adjustment or maintenance.
What colour will it be, will your choice effect the performance.
Think about the location of the thermometer screen in a typical garden. It will
need to be robust enough to cope in this situations.
Needs to be easy to open to allow access to thermometer and for cleaning.
How will it hold the thermometer?
Will it be a manual reading thermometer or an electrical resistance thermometer,
how will this effect the design.
Will it need a power source? How long will it last?
How will you know if your screens design is effective?
Is your design effecting the readings of your thermometer?
Name_______________
Analysis
Limitations – What might
hold me back?
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Time
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Construction methods
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Cost
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Resources – what can I
use to make the Thermometer
Screen
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Tools, saw, hole cutter, spanner,
drill with drill bits,
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Permanent marker, compass for
marking out.
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Ruler, tape measure.
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Bench clamp.
Materials Available
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Thermometer, long shaft
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Plastic pipe
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Metal threaded rods & harware.
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MDF /Wood sheet
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Cable ties
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Glue
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Silicon sealant.
Date________________
Design and Technology – Thermometer Screen Project
Enter your picture/s here
Enter your picture/s here
Front opening, would be easy to
read thermometer.
More complex design, more
difficult to build/design.
Not ventilated on all sides,
possibly poor temperature
stability.
Appears to be made from plastic,
Very large, steps required!
Might be difficult to see
thermometers.
Looks strong and sturdy.
Would be difficult to build, and would
take up alot of space.
Appears to made of wood for the
screen and metal for the stand.
Enter your picture/s here
Enter your picture/s here
Small and compact,
Easy to manufacture.
Will only hold small
thermometers.
Easy to install anywhere.
Appears difficult to read
thermometer, probably only used
for digital temperature probes
Appears to be made from plastic
Good height for viewing the
thermometer.
All-round ventilation, so good
temperature stability.
Many parts so difficult to manufacture
and assemble.
Appears to be made from plastic and
metal for the stand
Cut out from a unwanted catalogue, print out from internet or simply sketch examples of
thermometer screen
Label good and bad features and label materials used to make the thermometer screen
Name_______________
Date________________
Design and Technology – Thermometer Screen Project
NEEDS OR REQUIREMENTS
REASON
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The thermometer must be protected from the
sun.
Reduces the effect of direct heating on the
thermometer
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Suitable for a typical garden
Not to big, does not take up an unacceptable
amount of space in the garden
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Must be robust
Will be outside so must be able to withstand the
British weather.
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Must be stable, will not fall over.
Could cause damage to screen, thermometer
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Must be easy to access
For reading the thermometer and cleaning of the
screen.
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Must hold the thermometer securely
Do not want to drop the thermometer as will
damage it.
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Must be predominantly white.
Will reflect heat from the sun
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Must be ventilated
Will allow ait flow, so thermometer will measure
air temperature.
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Any metal parts should be stainless steel
Will stop corrosion and failure of the screen.
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Must be weather proof, ie will not degrade in
wet or hot weather.
Will give long term use of the screen
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Easy to manufacture from simple components
This will help keep costs down
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Easy to build from components without any
special tools
Easier to make if only a few tools are required.
Tick the box only if you have
satisfied that need
Traine
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Peer
What you have to do:
Marked by:
Have you written down a list of the
requirements that the design must
satisfy?
Does the list include at least five
different types of requirement? For
example: what it looks like, the
needs of the person using it, cost,
safety, size, how it will work,
materials available and tools
required.
Have you taken users' views into
account? Does the list include the
things that limit what can be
made?
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Can you show that the list
considers the needs of the people
who will use the product?
Have you explained why each is
important?
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Are the features of similar products
mentioned in the specification
Does the explanation say how
similar products look and work, and
what this means for the product?
Effort grade awarded:
Your specification would be Even Better If....
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Marking:
You
Before starting to design it is a good idea to list down all the requirements for the
container and explain the reasons for each requirement. This is known as a
specification, we have started for you. Think of some more, include who will be the
user of the screen.
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Design and Technology – Thermometer Screen Project
TASK . Spend this lesson drawing your first initial design idea for a thermometer screen.
Label the materials and features of the design. Then evaluate your idea by writing about its
good points and bad points. Look at the specification from last lesson—does it meet the
specification you set?
Vanishing Point
Evaluation of Idea 1
Good Points
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Bad Points
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Name_______________
Date________________
Design and Technology – Thermometer Screen Project
TASK . Spend this lesson drawing your second initial design idea for a thermometer screen.
Label the materials and features of the design. Then evaluate your idea by writing about its
good points and bad points. Look at the specification from last lesson—does it meet the
specification you set?
Vanishing Point
Evaluation of Idea 2
Good Points
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Bad Points
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Name_______________
Date________________
Design and Technology – Thermometer Screen Project
Evaluation of
Idea 3
Good Points
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Bad Points
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Name_______________
Date________________
Marking:
Marked by:
Have you labelled what is
different between each
idea?
Have you written about
which idea is best and
explained why?
Have you included
comments about what
users think of your ideas?
Level Achieved:
Teacher Comment – to improve, you
should....
Trainer
Tick the box only if you
have satisfied that need.
The overall level achieved
must have all of the boxes
above it in that column
ticked
What you have to do:
Have you sketched three or
more ideas?
Are there labels on every
sketch?
Are there at least three
clearly different ideas?
Have you shown that you
take into consideration the
specification in your ideas?
Peer
Vanishing Point
I have decided to develop design number.......
Because ........................................................
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You
TASK . Spend this lesson drawing your third initial design idea for a thermometer screen.
Label the materials and features of the design. Then evaluate your idea by writing about its
good points and bad points. Look at the specification from last lesson—does it meet the
specification you set?
Design and Technology – Thermometer Screen Project
Name_______________
Date________________
Design and Technology – Thermometer Screen Project
TASK . Spend this homework completing a flowchart of the stages of construction of the thermometer screen? Describe
each stage giving as much detail as possible about the tools, materials and quality points at each stage.
Start
Manufacture the 3 Wood/MDF sheet
components. (Item1, Item2, Item3)
Ensure edges are neat and rounded off.
Manufacture the x7 120mm diameter plastic
pipe sections.
Ensure cuts are perpendicular to axis, and
that all edges are smoothed off.
Manufacture the 150mm outer body.
Mark out positions of ventilation holes and
drill out all to same diameter.
Ensure cuts all edges are smoothed off.
Cut the x3 43.0cm threaded rods to lengths.
Cut the x2 3.5cm threaded rods to length
Cut the x1 21.0cm threaded rod to length.
Ensure the cut ends are filed down to remove
and sharp edges.
All parts are now constructed.
Finish
Name_______________
Date________________
Design and Technology – Thermometer Screen Project
TASK . Write step by step assembly notes, that will help you build the
screen. Include diagrams if necessary.
Name_______________
Date________________
Construction / Assembly Notes:
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Insert a 430mm M5 threaded rod into one of the holes in item1 Secure in place with an M5 lock nut on the under side and an M5 nut
on the top side. Ensure that the threaded rod only protrudes from the lock washer by 3mm.
Repeat this procedure for the other two 430mm M5 threaded rods.
Locate the first 125mm plastic tube section between the rods and nuts on the top of the sheet.
Thread an M5 nut onto a rod and spin it down the thread till the top of the nut is level with the top of the tube section.
Put an M6 washer on the rod and allow to fall to the nut. Thread another nut onto the rod and spin it down to the washer and tighten
the two nuts together capturing the washer, the bottom of the washer should be in contact with the top of the 125mm tube section.
Put an M6 washer on the rod and allow to fall to the nut. Thread another nut onto the rod and spin it down to the washer and tighten
the three nuts/ two washers together. This upper washer will be the capture point for the next tube section.
Repeat 4-6 for the other two rods.
There now should be a captured 125mm tube on item1.
Drop another 125mm tube down the rods and ensure it sits on the uppermost washer on all three rods.
Repeat 4-6 for all three rods for the new tube section, ensuring all nuts are tight and that the washers capture the new tube section.
The final tube section only require one washer per rod to hold the section in place.
Take the 150mm diameter tube and carefully slide this tube over the 125mm/M5 rods. Adjustment of the position of the washers may
be required to allow the 150mm tube to slide over them. The 150mm diameter tube should be slide all the way down to the base
(item1).
Take the x2 35mm threaded rods and screw them into the two 5mm holes drilled 75mm apart. Ensure 10mm of each thread
protrudes through the top side of Item2. Secure in place with a washer and lock nut on the under side. These rods will be used to hold
the cap in place.
Take Item2 and locate the tops of the 430mm rods in the holes located at 73mm from the middle, ensure the 35mm rod section
without the nuts is upwards.
Secure Item2 on the 430mm rods with M5 butterfly nuts.
Take item3 and run the 210mm rod through the hole that is offset from the centre by 15mm. Secure in place with a washer and nut
on the under side and a washer and locknut on the upper side. Ensure no rod protrudes out of the lock washer.
Using cable ties carefully secure the thermometer to the long length of rod on the underside of item3. Ensure the cable ties are
placed outside the range of -10°C to +30°C.
Carefully drop the thermometer assembly into the 50mm hole in the top. The two stubs of rod protruding from item2 should locate
into the holes of item3. Secure item3 in place with M5 butterfly nuts.
Design and Technology – Thermometer Screen Project
TASK . Build your screen, write down any issues, design tweeks, additional
construction diagrams or instruction that would have helped in the
construction
Name_______________
Date________________
Issues during build / Design Tweeks.
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Marking up of tubing problematic as drawing parallel lines on tube difficult.
Filing of end of M5 rods required to enable nut to catch on thread properly.
Time consuming to thread nuts onto rod, care required!
Mounting rod for the thermometer required covering in heatshrink to stop thread marking the
thermometer.
Cable ties that hold the thermometer to the rod may at times obstruct the reading on the
thermometer.
Ventilation and drain hole required in the base.
Design and Technology – Thermometer Screen Project
TASK . Think how you are going to make sure your design is working correctly? How are you going to test it? Which of
your requirements of the design are you going to test. Describe a testing / calibration procedure to prove your design.
Testing Your Design
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Compare hourly manual readings from the screen to readings from a Met Office AWS (Automatic Weather station).
Try and do this on days of different weather to see if there are any effects on the readings.
Will have to find a suitable location for the screen to reduce effects of shad, shielding from wind, reflected sun, etc
Keep a record of any issues found with the construction such as water ingress, loose fittings, deterioration of build etc..
Name_______________
Date________________
Design and Technology – Thermometer Screen Project
TASK . Test your design and write up your results and any conclusions you can draw from them.
Test Results:
From these results it
appears the screen
performs well.
However there appears
to be an increasing
positive offset in warmer
weather. Perhaps there is
not enough ventilation in
the screen. It would be a
good idea to perform
further tests in warm
weather.
Design and Technology – Thermometer Screen Project
What went well with the design
and build
Manufacturing of the items for
the screen was easy, the screen is
well braced with the nuts and
washers and is sturdy, and the
overall look of the screen is sleek
and modern.
What is needed:
What didn't go well with the
design and build
It was fiddly to get the nuts and
washers in the correct position,
and also time consuming. Water
ingress an issue.
Tick the box only if you have satisfied
that need. The overall level achieved
must have all of the boxes above it in
that column ticked
Marked by:
Trainer
Marking:
Peer
Further Explanation and
detail.
You
Evaluation question
You can write about what went well,
what didn't go well and what needs
improving.
Have you listed some of the steps in
making the rain gauge that gave good
quality results?
Have you listed the features of the
product that are successful? Note:
look back at your specification and
include points from your specification,
e.g. what the product looks like as
well as how it is used.
Have you listed at least four
improvements that could be made to
the making process or the final
product?
Did you test the product in use?
Have you explained how well you
used the information from your
research?
If you could design it again, how
would you do it differently?
Devise a different method for
holding the inner sections apart,
cutting down on assembly time.
Also put ventilation and drainage
holes in the base.
Appeared to do very well,
however there appears to be an
offset for warmer temperatures.
Further investigation required at
warmer temperatures to ensure
screen is not heating up.
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Have you explained how you tested
the rain gauge in use?
Have you listed at least two
improvements that could be made in
the product from testing?
Have you identified what extra
information at the research phase
would have helped you to design a
better product?
Effort grade awarded:
What did the test of the
thermometer screen show?
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Your evaluation would be Even Better If ........
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Design and Technology – Thermometer Screen Project
End of Project Checklist
Situation, brief and analysis sheet completed
Research into existing Thermometer Screens
Research powerpoint presentation into components of Thermometer Screens
complete
Specification on all important points for the Thermometer Screens
At least 3 initial ideas drawn out and evaluated
Chosen idea drawn out in perspective, clearly labelled and colour shaded
Orthographic drawing (full size) of chosen idea
Marking:
Marked by:
What is needed:
Have you described or sketched
the design that you planned to
make?
Checked by
Have you described or sketched
what you actually made?
Have you explained any
differences between the design
and final product?
Have you listed the steps of the
making process that were easy
to use or gave a good quality
result?
Have you listed the features of
the product that are working
well?
Note: This can include what the
product looks like as well as how
it is used.
Have you listed at least four
improvements that could be
made to the making process or
final product?
Have you explained how the way
you tested the product compares
to how it will be used?
Have you reviewed how well you
used the information from your
research?
Effort grade awarded:
Production plan on how to make a Thermometer Screen
Testing carried out and evidence completed
End of Project Evaluation
Name_______________
Date________________
Trainer
Tick the box only if you have
satisfied that need. The overall
level achieved must have all of
the boxes above it in that
column ticked
Peer
Photo or sketch of completed product:
You
Evaluation:
1.
Describe in detail exactly what you
designed as your chosen idea. A
good way of doing this is to imagine
that you were explaining your idea
over the telephone.
2.
What went well in making your
Thermometer Screen?
3.
What didn't go well?
4.
Now explain in detail what could
have been improved or what you
managed to improve.
Teacher comment – to improve, you should ........
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