We (@Ashish_Pardeshi, @jtd , @Farhan , @_siddiquisubhana, @sandysat @Ambika, @msakeenah @Ambika_Indore) started with exploring Ultrasonic Sensor (HC-SR04). @_siddiquisubhana is interfacing this with Arduino.
We started looking at its Data Sheet and understanding its functional range.
We managed to understand the working frequency (40 Hz ~25 ms) and its relation to the maximum distance (425 cm: 400 cm in datasheet). (See the calculations on the right in the figure below.)
Now the question was - what happens if the echo of trigger pulse t1, is received after the next trigger t2? Does it confuse the sensor, or how does the sensor resolve it? See the figure below. (The blue lines traces the path of the light)
This involves clarifying reflection of sound, properties of material…
- @sandysat says We can use a signature (send pulses of diff amplitude, frequency, and number of pulses) for trigger signals. But we are unsure how the material responds to each of these?
More clarification is needed. Let’s talk!