ArticCynda
Advanced Member level 1
Hi everyone,
I'm looking to record vibrations of machines in the frequency range between 0 - ca. 2 kHz with an accelerometer (amplitudes fewer than 4g). According to Shannon-Nyquist theorem I should aim for a sampling frequency of around 4 to 5 kHz.
After making a survey of commercially available accelerometers from Digikey, I noticed that sampling rates are rarely mentioned in accelerometer datasheets. For example the LSM303 makes mention of SPI and I2C data rates, but doesn't mention the maximum sampling frequency anywhere in the datasheet. It's not mentioned in the characteristic data tables either.
Am I perhaps looking at the wrong parameter? Or are there other reasons why maximum sampling frequency isn't mentioned in the performance characteristics?
If anyone has experience with specific accelerometers for this purpose and can recommend some, I'd be very grateful!
I read about recording vibrations using piezo discs, why is that better or worse than accelerometers for this application?
I'm looking to record vibrations of machines in the frequency range between 0 - ca. 2 kHz with an accelerometer (amplitudes fewer than 4g). According to Shannon-Nyquist theorem I should aim for a sampling frequency of around 4 to 5 kHz.
After making a survey of commercially available accelerometers from Digikey, I noticed that sampling rates are rarely mentioned in accelerometer datasheets. For example the LSM303 makes mention of SPI and I2C data rates, but doesn't mention the maximum sampling frequency anywhere in the datasheet. It's not mentioned in the characteristic data tables either.
Am I perhaps looking at the wrong parameter? Or are there other reasons why maximum sampling frequency isn't mentioned in the performance characteristics?
If anyone has experience with specific accelerometers for this purpose and can recommend some, I'd be very grateful!
I read about recording vibrations using piezo discs, why is that better or worse than accelerometers for this application?