ME here who needs some circuits help.
I have an AC source that outputs a variable frequency (chirp) signal. I'm trying to calculate the total energy draw from the circuit during the entire measurement in Joules. My circuit is simply a resistor and a piezoelectric transducer in series. I simultaneously sample the voltage on both sides of the resistor (Vx and Vy seen in the picture).
The instantaneous current can be calculated by my voltage drop (VxVy) across the resistor with ohm's law, and the instantaneous power of the resistor can be easily calculated (P=VI, P=I^2R etc.).
For the transducer, I think it should have some sort of capacitance/inductance which would get into phase angle and power triangle and things an ME doesn't understand. Since I already directly measure the voltage across the transducer (Vy), would the instantaneous power simply be Vy*I?
Then the total instantaneous power is the sum of the resistor and the transducer, which I can integrate over time to give me energy. Is this the correct approach?
I have an AC source that outputs a variable frequency (chirp) signal. I'm trying to calculate the total energy draw from the circuit during the entire measurement in Joules. My circuit is simply a resistor and a piezoelectric transducer in series. I simultaneously sample the voltage on both sides of the resistor (Vx and Vy seen in the picture).
The instantaneous current can be calculated by my voltage drop (VxVy) across the resistor with ohm's law, and the instantaneous power of the resistor can be easily calculated (P=VI, P=I^2R etc.).
For the transducer, I think it should have some sort of capacitance/inductance which would get into phase angle and power triangle and things an ME doesn't understand. Since I already directly measure the voltage across the transducer (Vy), would the instantaneous power simply be Vy*I?
Then the total instantaneous power is the sum of the resistor and the transducer, which I can integrate over time to give me energy. Is this the correct approach?
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