Hello All,
I wanted to start a new post on this topic even though I have seen a number of threads about this. I'd like to see if I could get some specifics on what I would need to do for a little project I have.
The research topic that I'm currently working on in mechanical engineering (that's why I don't know much about electronics) is requiring me to have a piece of circuitry that will give me a DC voltage output that is proportional to the primary oscillation frequency of an incoming signal. Here are the specifics I mentioned earlier. I am working with a high frequency actuator that pulses between 4 and 6 kHz. I would also like to have a frequency resolution of about 5 Hz or so. I have a sensor inside of the actuator that is monitoring the unsteady pressure fluctuations (the actuator is fluidic-based). I need to send this signal in to the circuitry and have a DC voltage come out. I'm using a narrow band pass filter the clean up the signal from my transducer, and I can calculate the frequency easily using my oscilloscope or data acquisition hardware. My issue is that I'm trying to record my actuator's frequency on-the-fly, if you will (or at least as close to instantaneously as I can get).
I know that there are a number of circuit diagrams that use the 555 timer to output a pulse width modulated signal and that you have to use an integrator circuit to have that converted to a DC voltage. I am not really sure what all components I need for this as well as the specifics - does the frequency range I can measure depend on the resistors, capacitors, etc? I have wired up a couple of basic circuits in my day, and I do know how to solder. Being an engineer, I ought to be able to figure out how to wire these up from some circuit diagrams. My problem is that I just don't know all of the components I need and where I can get them (if my local Radio Shack doesn't have any).
Can someone help me out here?
Thanks,
Phil
I wanted to start a new post on this topic even though I have seen a number of threads about this. I'd like to see if I could get some specifics on what I would need to do for a little project I have.
The research topic that I'm currently working on in mechanical engineering (that's why I don't know much about electronics) is requiring me to have a piece of circuitry that will give me a DC voltage output that is proportional to the primary oscillation frequency of an incoming signal. Here are the specifics I mentioned earlier. I am working with a high frequency actuator that pulses between 4 and 6 kHz. I would also like to have a frequency resolution of about 5 Hz or so. I have a sensor inside of the actuator that is monitoring the unsteady pressure fluctuations (the actuator is fluidic-based). I need to send this signal in to the circuitry and have a DC voltage come out. I'm using a narrow band pass filter the clean up the signal from my transducer, and I can calculate the frequency easily using my oscilloscope or data acquisition hardware. My issue is that I'm trying to record my actuator's frequency on-the-fly, if you will (or at least as close to instantaneously as I can get).
I know that there are a number of circuit diagrams that use the 555 timer to output a pulse width modulated signal and that you have to use an integrator circuit to have that converted to a DC voltage. I am not really sure what all components I need for this as well as the specifics - does the frequency range I can measure depend on the resistors, capacitors, etc? I have wired up a couple of basic circuits in my day, and I do know how to solder. Being an engineer, I ought to be able to figure out how to wire these up from some circuit diagrams. My problem is that I just don't know all of the components I need and where I can get them (if my local Radio Shack doesn't have any).
Can someone help me out here?
Thanks,
Phil