When this adaptive threshold is used, the minimum detectable fault is characterized.
An average SNRdB at the signal peak was measured to be about 70 dB in this experiment, yielding a theoretical minimum detectable phase shift of about 0.3 mrad.
The minimum detectable phase shift, measured from the standard deviation of the phase difference from a stationary coverslip (no scanning) [ 13], was 0.03 radians (1.6°).
Thus, the right-hand side of 8 becomes an expression of the bound optical mass that would induce the minimum detectable LSPR wavelength shift.
Theoretical and experimental analysis suggests that the minimum detectable sensitivity for a resonant frequency shift due to a PSA Ag Ab interaction depends on the dimensions of the nanomechanical PZT cantilever.
However, since the time duration between the two axial lines used to determine the phase shift also increased, the minimum detectable velocity decreased as a function of p, and hence the method extended the total detectable velocity range of the system.
The minimum detectable concentration by visual detection was ~500 nmol.
Currently the minimum detectable flow velocity determined by the noise floor of the Doppler shift shown in Fig. 3(a) is ~2 mm/s, assuming a Doppler angle of 70°.
For a given range of detectable Doppler phase shift, shortening the acquisition duration will increase not only the maximum detectable velocity but unfortunately also the minimum detectable velocity, which may lead to the invisibility of a slow flow.
Therefore, without phase unwrapping, the maximum detectable phase shift is π, and the maximum detectable axial velocity is given by The theoretical limit for the minimum detectable velocity, on the other hand, is determined by the phase stability of a PR-DOCT system.
