Sensor Limit
Acceleration thresholding defines the maximum physical range a transducer can convert into a representative electrical signal before internal clipping occurs. High g saturation occurs when the inertial forces applied to a piezoelectric or strain-gauge element exceed the specified measurement span of the internal amplification circuitry. Distortion prevents the output from tracking further increases in input velocity or shock loads.
Nonlinear response errors dominate the signal path once the active components reach their physical voltage rail limits.
Signal Clipping
Voltage output levels track proportionally with mechanical stress until the circuit reaches its operational ceiling. High g saturation creates a flattened waveform that masks the true peak magnitude of an impact event. Processing units receive a constant maximum value rather than the actual transient profile.
Data acquisition systems identify this condition through sudden transitions from sinusoidal or complex waveforms into a hard-limited constant output state. Engineers identify these occurrences by inspecting for flat-topped waveform peaks which differ from the expected high-frequency content of the source event.
Calibration Drift
Metrological integrity relies upon maintained linearity between the input acceleration and the corresponding digital count. High g saturation introduces thermal stresses into the sensing element if the load persists beyond the rated duration. Sensitivity coefficients change due to internal heating of the transducer bridge after reaching a non-operational state.
Regular testing against a vibration reference shaker verifies the upper bound of the measurement range to ensure the sensor remains within specified performance tolerances before the onset of signal suppression.
System Verification
Accuracy remains dependent upon matching the rated range of the sensor to the expected maximum load of the application environment. High g saturation indicates a failure in the mechanical decoupling or range selection process for specific shock testing. Proper sensor selection incorporates a safety margin above the maximum predicted input to prevent the data path from reaching a state of electrical restriction.
Correct identification of the signal floor prevents the erroneous analysis of clipped data sets.
