Sampling Rate Example

218

02:54:11

When taking in analogue voltage values a sampling rate must be set for when values will be taken to approximate the original waveform. Some data will always be lost in the translation from analog to digital conversions and vice versa, but this loss can be diminished by increasing the sampling rate. At bare minimum the sampling rate must be at least twice the frequency of the target waveform otherwise nothing meaningful can be taken from the data gathered. As the sampling rate increases, the accuracy of the data points increases as well.
Unless I’m the victim of a prank gone on way too long the typical desired sampling rate must be at least 10 times faster than the input. The downsides of a higher sampling rate include more closely tracking noise and requiring more system memory to store data points.
Change the frequency/ period of the AC/ clock sources respectively and see how the output more accurately tracks the input wave when Fclock>>>Fin.

published 8 years ago

BillyT

8 years ago

The basics are there, with the event of modern computers, industry has been able to change its measuring to digital, this enables more accuracy in process because it's easier to manipulate, store, and make calulations upon. Unfortunately most forms of state measurement is easier to obtain thru an analogue form of the measurement. The form of analogue measurement standards have changed many times over the last half century, the main standard at the moment being 4-20mA this being fortunately easy to reformat into 4, 8, 16, 32 or even 64 bit digital words making it easier to store and or manipulate. The main considerations now is to obtain maximum accuracy, is to fit the expected sampling values into the 4-20mA sample window as close as possible, allowing for any expected under/over shoots and to balance the dampening of the signal to eliminate unnecessary noise . The sampling rate is then setup to fit the systems word size and speed of process. When done correctly the maximum accuracy and minimum data loss can be more assured, thus increasing the reliability of the data being monitored enabling more accurate calculations which maximises the processing procedures.

snowfats

8 years ago

Neat, technology is awesome

hurz

8 years ago

Billy, you sounds like Lenny.

BillyT

8 years ago

Who's lenny?

rich11292000

8 years ago

Lensrules

rtarade

8 years ago

Check out my version http://everycircuit.com/circuit/6495996279521280

lenzrulz

8 years ago

BillyT prefers assisting budding enthusiasts rather than resorting to ridicule...yep, he sounds just like me.

hurz

8 years ago

Neat comment

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