Transcription of 9 - 8 章 超音波トランスデューサ
1 9 8 2 2019 1/(18) 9 - 8 2 2- 1 2- 2 2- 3 9 8 2 2019 2/(18) 9 8 2 2-1 [2018 12 ] 2-1-1 1 1 1 2 1 1 1 2 1 1 ( ) ( ) v(t)
2 V(t) 9 8 2 2019 3/(18) 1 1 ninjDjiiDhScT = ( ) nSnmjjmmDShE + = ( ) ninjEjiiEdTsS+= ( ) nTnmjjmmETdD += ( ) ninjEjiiEeScT = ( ) nSnmjjmmESeD += ( ) ninjDjiiDgTsS+= ( ) nTnmjjmmDTgE + = ( ) i, j = 1 to 6, m, n = 1 to 3 D E T S S cE, cD sE, sD e d h g E M AT C M AT P M AT 2-1-2 1 3 9 8 2 2019 4/(18)
3 2-1-3 1 4 2-1-4 EMAT E M AT E M AT 1 5 E M AT 9 8 2 2019 5/(18) 9 8 2 2-2 [2018 12 ] 2-2-1 2- 1 (1)
4 PZT PZT PZT Qm tan PZT Low Q Qm tan PZT High Q Q Q PT (2) Pb Mg1/3Nb2/3 O3 - PbTiO3 PMNT In Tc Pb ( In1/2Nb1/2) O3 - Pb (Mg1/3Nb2/3) O3 - PbTiO3 PIMNT Tc BiScO3 - PbTiO3 BPST KNbO3 KN 9 8 2 2019 6/(18)
5 Tissue Harmonic Imaging THI Contrast Harmonic Imaging CHI THI CHI (3) 20 m 100 m PolyVinylidene DiFluoride PVDF PVDF P (VDF + TrFE) 4 1 2 1 4 1 10 MHz m 2-2-2 Mason vlZj2tan0 vlZj2tan0 vlZj sin002E1 CjCj = 1.
6 ET2T101Cj v2v1iv1-v2 2 1 Mason 9 8 2 2019 7/(18) 2- 1 ( ) ( ) 2 1 Mason 2 2 v1 v2 l C0 Z0 vlZj2tan0 vlZj sin002E1 CjCj = 1 : ET101Cj ZB vlZj2tan0 v1iv2T2v1-v2 2 2 Zb = b cb 1) 1 , , , , , , 2016.
7 2) 2 , , , , , , 2017. 3) : , , 72 5 , , 2016. 9 8 2 2019 8/(18) 9 8 2 2-3 2-3-1 [2012 9 ] 1970 1) 3 1 3 2 3 1 2 3 2 Lateral PZT 1/4 Elevation Array 2) (1)
8 3 3 3 9 8 2 2019 9/(18) (a) (b) (c) 3 3 (a) Linear Array Probe 64 256 Linear Scan Foot Print (b) Convex Array Probe Curved Linear Array 20 60 mm 1 5 MHz (c) 32 128 45 Sector Scan Phased Array Grating Lobe /2 (2) 3 3 3) 3 3 4 2 Two-d imensional Array Sparse Array SN 4) 5)
9 3 2 3 5 6) 9 8 2 2019 10 /(18 ) 3 4 2 3 3 5 2 (3) CMUT CMUT Capacitive Micro-machined Ultrasonic Transducer MEMS 7) 8) 3 6 3 7 DC CMUT 3 2 3 6 CMUT 8) 3 7 CMUT 1) ( ) , , 2) , ( ): , , , 1999.
10 3) 3 , ( ): , , , 1999. 4) Turnbull and Foster Beam Steering with Pulsed Two-Dimensional Transducer Arrays, Trans. IEEE 9 8 2 2019 11/(18) f r f h Ultrasonics, , , , Jul. 1991. 5) B. Savord and R. Solomon Fully sampled matrix transducer for real time 3D ultrasonic imaging, Proc. IEEE Ultrasonics Symposium, , , 2003. 6) S. Tamano, et al. 3D Ultrasound Imaging System using Fresnel Ring Array & High Voltage Multiplexer IC, Proc. IEEE Ultrasonics Symposium, , 2004. 7) Haller and Khuri-Ya k u b A surface micromachined electrostatic ultrasonic air transducer, Proc. IEEE Ultrasonics Symposium, , 1994.
