[ARM] Tracking Radar using ultrasonic sensor and lpc2148.

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sasituraga

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I want to find the velocity of the moving object while tracking it. Can anyone please please help me with the code from which I can calculate the velocity of the object which is in movement.
 

Hi,

No valid information. Impossible to give a detailed answer.

Only a general answer:
You need to measure "distance of movement" within a dedicated "time".
Then you are able to calulate: velocity = distance / time

Klaus
 

sasituraga said:
I want to find the velocity of the moving object
Click to expand...

At first glance, seems that we could take a general rule by starting with:

Code: 
L = (As).(ΔT)/2

Where:
ΔT: Time elapsed between each echoed sample (Tn - Tn-1) [seconds]
As: Air speed (normalized to 343) [m/s]​
Resulting:
L: Distance traveled in the above elapsed time [meters]​
Click to expand...

Therefore, considering measuring two "L" samples, took in sequence:

Code: 
Instantaneous_Speed = ΔL/ΔT    [m/s]

Anyway, you could re-check if it is correct.
 

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