Dakota Ultrasonics
74
Where:
N = Near Field Length
D
EFF
= Effective Diameter
= Wave Length (velocity/frequency)
In order to approximate the effective diameter, the shape of the crystal must be taken
into account. Transducers are either round or square/rectangular in shape, and can
be approximated as follows:
Round Crystal (D
EFF
)
Where:
D
EFF
= Effective Diameter
Dia. = Diameter of the crystal
0.97 = Fixed ratio
Square/Rectangle (D
EFF
)
Where:
K = Aspect Ratio
A = Largest Dimension
B = Smallest Dimension
Where:
Содержание DFX-7
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Страница 162: ...156 APPENDIX B SETUP LIBRARY Num Name Comment 1 Gn AGC Velocity 1 Enter Custom Name 2 3 4 5 6...