Hi community! I am trying to pick up and accelerometer for my project. The thing is that I need to measure quite "slow" mechanical vibrations (0-100 Hz). The amplitude of the vibrations is within 0-4g. The thing is that the project is more mechanical and I need an easy and simple way to measure the vibrations accurately (if possible with 14-16bit resolution) and a Library must be present for the easier use. Also it is advantageous that the accelerometer supports SPI/I2C interface.
I've spent some time looking through the datasheets of MPU6050 (http://www.bt2000.co.uk/datasheets/invensense/mpu6050.pdf) the thing that is unclear for me is if the "low-pass filter response" (like, what it is ??) and if the "Output data rate" is the sampling frequency ?
Also there's quite popular ADXL335 but the thing is that it is stated that " The included 0.1uF capacitors set the bandwidth of each axis to 50Hz" (SparkFun Triple Axis Accelerometer Breakout - ADXL335 - SEN-09269 - SparkFun Electronics) would that mean that I can not measure vibrations in 0-50Hz bandwidth.
Also MMA8451 (Overview | Adafruit MMA8451 Accelerometer Breakout | Adafruit Learning System) looks like an option, due to it's high resolution and good price. But i can not understand from the datasheet if it is suitable in terms of frequencies I am going to measure.
I am going to use accelerometer with Arduino Mega 2560, and store data on microSD trough SPI, that's basically all the program would do.
Anyone can suggest any accelerometer for the given problem, something you had experience with and somethign that you found working well (for the moment MMA8451 looks like the one I'll go for) ? Thank You Community!