Hi, I'm here for emergency help.
I'm working on a gust generator for my final-year thesis. So, I need to measure air force in the X, Y, and Z directions at a specific point on my object.
I try using a load cell, but it doesn't give me an exact value. I tried everything, but the load cell was not working here. So, could someone please show me how to measure air force in three directions at a specific point?
Thank you.
What do you mean by "exact value"? What would be "exact" and how would you know that?
How do you plan to calibrate this setup, in order to get meaningful data?
Keep in mind that all sensors are noisy, and sensors that measure noisy processes like air flow present a very difficult challenge. Solving that challenge is a good thesis project, all by itself.
measure air force in three directions at a specific point?
I suggest to assume that this is not possible at a specific point, and redesign your experiment accordingly.
Three flex sensors at right angles to each other?
Exact meaning, for example, when air flow strikes an object, I need to know how much load or force was present.
I attached a load cell there, but the main problem is that the load cell needs to be calibrated every time the place is changed.
My object is a house model with a gable roof tin. So it couldn't be calibrated when I attached the load cell there, and it also didn't give an accurate value, such as when the same object showed 10 gram, 2 gram, and 13 gram at different times. and also that sometimes it didn't show any value. I'm using the HX711 module in conjunction with a load cell. So I'm looking for another sensor that can give me a more accurate value for measuring how much force is on a point on my house model. Do you know anything that can help me?
How do you know the results are not accurate when you cannot calibrate the sensor. Remember that air is a fluid and fluid moment always results in turbulence. So a single point of measurement is questionable.
If you mean that the value changes rapidly, try saving only at the greatest value, or use a number of samples and divide by the number.
Brother, I need an alternative to measure the air force.
The "air force" (its called pressure) is not directional.
The force generated by wind acting on a surface is measurable, and will depend on the characteristics of the surface.
So if you put a flat surface in free air you can measure the force acting on it orthogonally to the plate.
I suppose if you make an empty sphere connected to its central point through load cells you could measure the x y and z forces; but how you then fix that central point I dont know.
More sensibly you could meaure the wind speed in x y and z directions with an anemometer.
The starting point of making a measurement is to understand what it is you are trying to measure.
I was meditating on your thread as I rocked in the living room. The solution is shockingly simple.
Measure the air pressure at the center of the wall, on each side. The difference times the wall area is the force applied by the wind.
You may need to measure the pressure in microbars.
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Supplied by microBreweries?
will only give the force perpendicular to the wall.
We are dealing with a gas. The only force is pressure. Where in an inflated balloon is the force different?
It isnt.
Watch your tent blow away in a gale - its because the pressure is different as the air is moving.
(chicken and egg does the movement alter the pressure, or the pressure difference cause the movement?)
If the wind is blowing directly (ie perpendiculr) to a flat surface you see a force acting on it.
If the wind is parallel to the surface the pressure is the same on both sides, so you dont.
Don't tell any airplanes.
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