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 (Vx-Vy) 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 (Vx-Vy) 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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