© Sandrine New
To study the weather, meteorologists record and analyze data. It is possible to become an amateur meteorologist without spending a fortune on measuring instruments in constructing its own weather station and taking note of his actions.
This series of articles showing how to build some instruments for measuring weather station. While not extremely accurate, of course, these instruments may nevertheless be used to measure weather conditions and to provide time to come.
Most instruments are simple enough to be built with children - sometimes with a little help - for a project to do at home or at school.
This article speaks of instruments used to measure wind force.
1) Hear the Wind (Build wind chimes)
A wind chime is not, Strictly speaking, an instrument used by a weather station because it does not measure anything. It is, after all, a nice way to hear the wind blow. It gives also an indication of the wind and can help predict a storm approaching, for example. In addition, building a wind chime is a simple project that can be undertaken even with very young children.
must:
- Various metal objects (nuts, washers, screws, nails, lids of jam ...). Alternatively, it is possible to use shells or pieces of bamboo of different lengths
- fishing wire from different lengths (approximately 25-28 cm)
-
scissors - a long straight stick (tree branch, joystick ...)
Instructions:
1. Hang a piece of fishing line to each object.
2. Hook the other end of each wire fishing long pole so that the objects hang freely, with 1 or 2 cm from each other.
3. Attach two extra pieces of fishing wire at the ends of the stick, and used to hang the wind chime, horizontally, from the branch of a tree. In the absence of tree it is possible to make a stand by planting two sticks vertically in the ground and attaching the stick.
Explanation:
When the wind blows, it moves the objects collide. Through their music, you hear the wind blow.
2) Estimate the Wind Speed and Direction Finding (Building a windsock)
The sock helps determine wind direction and also gives an indication of its speed. Ventilators are commonly used at smaller airports and along highways.
must:
- 1 small piece of cloth measuring approximately 1m x 1m, if possible with broadband
-
scissors - a needle and thread
- 1
curtain ring - a metal coat hanger (or lack of wire and an extra ring)
- thick cardboard
- 1 permanent marker
- 1 joystick
- bugs
- 1 stick light of about 60-70cm, as used in gardening
- tape
- a strong cord
- 1
compass - clips
Instructions:
1. Cut the fabric into a cone shape, and sew together the two straight sides. If the fabric is scratched, try to keep the strips perpendicular to the straight sides.
2. Bend the hanger into a circle. Y slip ring curtain. Bend the hook of the hanger to form a small ring.
3. Place the circle formed by the metal hanger on the great ouveeture of the fabric and sew it on. Be careful to place the curtain ring opposite to the ring formed by the hook of the hanger, and to provide an opening.
4. Cut a circle of 30 cm diameter hole in the cardboard. Make two small slits perpendicular at its center. Write "N", "E", "S" and "O" on the edges of the circle at regular intervals.
5. Slide the stick into the slots of the circle and set it on the stick with the bugs.
6. Drag the small stick through the curtain ring and the ring formed by the hook of the hanger. The tape of these two rings so that no more than one side.
7. Hang the small piece of stick over the long broom handle with a string. The windsock should be located above the joystick.
8. Place the sock in a windy area. The joystick can be pressed into the ground, but the air intake will work better if it is placed above example, if the joystick is hooked to a fence.
Explanation:
The wind enters the air intake by high opening, which is located near the joystick, and the windsock stands in the opposite direction to where the wind comes.
A windsock is conventionally composed of five alternating bands of red and white. Each band, when raised by wind, corresponds to about 5 knots - about 9 km / h -. The windsock is thus horizontal when the wind bent to a minimum of 25 knots - 45 km / h.
If the windsock is made of wide strips, it is possible to note how many of them are drawn up by the wind. It will not make an accurate estimate of wind speed, but it can help to record and compare measurements.
3) Determine Wind Speed (Building an Anemometer)
Model A:
must:
- a plastic bottle and cap
- 1 large straw
right - a large pearl
- 1 skewer Wood
- 3 toothpicks
- 2 corks
- sand
- 3 paper cups or yoghurt pots
- 1 knife
Instructions:
1. Cut a cork in three rounds and paste these in the paper cups.
2. Planting a toothpick in each slice, on their side.
3. Planting the skewer into the second stopper cork. It does not show the other side.
4. Planting the free part of the toothpick into the second stopper on the side at regular intervals.
5. Orient glass so they do all facing the same direction in the direction of clockwise or clockwise.
6. Make a hole in the cap of the bottle, large enough to slip the straw. Fill the bottle with sand and screw cap.
7. Planting the straw in the plug hole and into the sand.
8. Skip the skewer in the pearl and straw. If the skewer is longer than the straw shorter.
Explanation:
higher the wind is stronger, the anemometer spins. It is possible to count and record the number of turns Q'una glass done in a minute.
Model B:
must:
- 5 paper cups
- 2 straws straight
- 1 bug
-
scissors - a paper punch
- a stapler (or strong adhesive paper)
- a sharp pencil with an eraser
Instructions:
1. With a punch, make a hole in 4 of the lenses, about 1 cm from the edge.
2. In the fifth glass, punch 4 holes evenly distributed about 1 / 2 inch of edge. Then a fifth hole at the center of the bottom of that glass.
3. For 2 of 4 glasses, run a straw through the hole, fold the end of the straw and staple it to the side opposite the hole (you can also tape).
4. Slide a straw assembly / glass in the two opposite holes in the glass with 4 holes. Another glass slide with a single hole on the free end of the straw. Attach the straw to drink as before, making sure that the glass is rotated in the opposite direction to the first drink. Do the same with the other two glasses.
5. Arrange 4 cups so they are all in the same direction (clockwise clockwise or counterclockwise) relative to the central glass.
6. Plant bugs in the two straws, to where they intersect. Slide the pencil eraser top part, through the hole in the bottom of the glass center, and plant bugs in the gum at the bottom.
7. Place the anemometer in a location protected from wind. It is possible to make him a foot by filling a bottle with sand, making a hole in his cap, and sliding the pencil into the bottle through the hole.
Explanation:
The anemometer rotates with the wind, the more it goes, the faster the wind blows hard.
It is possible to simply count and record the number of rpm that makes the instrument - it helps to have a glass painted another color -. To calculate the approximate speed of rotation, must:
- Count the number of revolutions per minute (RPM).
- Calculate the circumference (in meters) of the circle made by the rotating paper cups.
- Increase RPM by the circumference of the circle.
The speed of the anemometer is however not the same as the wind speed.
Sources:
http://www.fi.edu/weather/todo/todo.html
M ake Y o O wn W eather S Tatio No
http://www.miamisci.org/hurricane/weathertools.html Weather
tools
http://ecolecentreferte.free.fr/projet-meteo/Le-projet-meteo.htm
http:// fr.wikipedia.org / wiki /% C3% Manche_ A0_air
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