31 Research on Immersion-Type Acoustic Emission …
371
Fig. 31.6 Relative error of
different distance and
distance measurements
array is the effective radius R of the detection unit, and the effective radius R can
be determined by the relative error analysis method of the sound source ranging.
In this paper, the mean value fitting method is used to average the relative error
values of the sound source ranging under the three sound source angles of ϕ = 0°, 15°
and −15°. Then the fitting relationship between the relative error of the ranging and
the distance r of the sound source is obtained. The fitting curve is shown in Fig. 31.7.
The fitting formula can be obtained (31.5).
y = 0.24x
2
+ 1.35x + 2.1
(31.5)
Fig. 31.7 Fitting curve of
relative error of sound source
localization and sound
source distance
371
Fig. 31.6 Relative error of
different distance and
distance measurements
array is the effective radius R of the detection unit, and the effective radius R can
be determined by the relative error analysis method of the sound source ranging.
In this paper, the mean value fitting method is used to average the relative error
values of the sound source ranging under the three sound source angles of ϕ = 0°, 15°
and −15°. Then the fitting relationship between the relative error of the ranging and
the distance r of the sound source is obtained. The fitting curve is shown in Fig. 31.7.
The fitting formula can be obtained (31.5).
y = 0.24x
2
+ 1.35x + 2.1
(31.5)
Fig. 31.7 Fitting curve of
relative error of sound source
localization and sound
source distance