Table 2: Comparison of vibration measurement systems.

HardwareFeatureSHM-HSHM-A (AS)Commercial PCB

AccelerometerModelSD1221L-002LIS344ALHPCB393B04
Sensitivity2 V/g0.66 V/g1 V/g
Input range±2 g±2 g±5 g
Output noise5 μg/Hz50 μg/Hz0.3 μg/Hz
Data acquisitionModelQF4A512QF4A512NI6036E
ADC resolution16 bits16 bits16 bits
Signal conditionerModelQF4A512QF4A512PCB481A03
Filter typeDigital filterDigital filterDigital filter
Dimensions57 × 37 × 8 mm45.8 × 45 × 8 mm483 × 413 × 135 mm
Weight12 g10 g7.8 kg
Total cost$US 400$US 100$US 20,000