ULTRASOUND RADIATING AND RECEIVING DEVICE
First Claim
1. An ultrasound radiating and receiving device comprising:
- a piezoelectric substrate;
a first comb-shaped electrode formed on an upper end surface of said piezoelectric substrate;
a second comb-shaped electrode formed on said upper end surface of said piezoelectric substrate; and
a counter electrode formed on a lower end surface of said piezoelectric substrate and in contact with a surface-part of a material through the lower end surface of said counter electrode, said first- and second comb-shaped electrodes forming an interdigital arrangement, said first comb-shaped electrode and said counter electrode receiving an input electric signal, radiating a longitudinal wave into said material through said surface-part of said material along the direction vertical to said lower end surface of said piezoelectric substrate, and making an object located inside said material reflect said longitudinal wave back, said second comb-shaped electrode and said counter electrode detecting a reflected longitudinal wave as a delayed electric signal.
0 Assignments
0 Petitions
Accused Products
Abstract
An ultrasound radiating and receiving device comprises a piezoelectric substrate, an interdigital arrangement of first and second comb-shaped electrodes, and a counter electrode. The interdigital arrangement is mounted on an upper end surface of the piezoelectric substrate. The counter electrode is formed on a lower end surface of the piezoelectric substrate, and is in contact with a surface-part of a material through the lower end surface of the counter electrode. When an input electric signal is applied between the first comb-shaped electrode and the counter electrode, a longitudinal wave is radiated into the material through the surface-part of the material along the direction vertical to the lower end surface of the piezoelectric substrate. If the longitudinal wave is reflected at an object located inside the material, a reflected longitudinal wave is detected between the second comb-shaped electrode and the counter electrode as a delayed electric signal.
3 Citations
29 Claims
-
1. An ultrasound radiating and receiving device comprising:
-
a piezoelectric substrate;
a first comb-shaped electrode formed on an upper end surface of said piezoelectric substrate;
a second comb-shaped electrode formed on said upper end surface of said piezoelectric substrate; and
a counter electrode formed on a lower end surface of said piezoelectric substrate and in contact with a surface-part of a material through the lower end surface of said counter electrode, said first- and second comb-shaped electrodes forming an interdigital arrangement, said first comb-shaped electrode and said counter electrode receiving an input electric signal, radiating a longitudinal wave into said material through said surface-part of said material along the direction vertical to said lower end surface of said piezoelectric substrate, and making an object located inside said material reflect said longitudinal wave back, said second comb-shaped electrode and said counter electrode detecting a reflected longitudinal wave as a delayed electric signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An ultrasound radiating and receiving device comprising:
-
a first piezoelectric substrate;
a first interdigital arrangement of two comb-shaped electrodes formed on a lower end surface of said first piezoelectric substrate, a lower end surface of said first interdigital arrangement being in contact with a surface-part of a material;
a second piezoelectric substrate;
a second interdigital arrangement of two comb-shaped electrodes formed on an upper end surface of said second piezoelectric substrate; and
a counter electrode cemented between said first- and second piezoelectric substrates, one of said two comb-shaped electrodes in said first interdigital arrangement and said counter electrode receiving an input electric signal, radiating a longitudinal wave into said material through said surface-part of said material along the direction vertical to said lower end surface of said first piezoelectric substrate, and making an object located inside said material reflect said longitudinal wave back, one of said two comb-shaped electrodes in said second interdigital arrangement and said counter electrode detecting a reflected longitudinal wave as a delayed electric signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. An ultrasound radiating and receiving device comprising:
-
a first piezoelectric substrate;
a first comb-shaped electrode formed on a lower end surface of said first piezoelectric substrate, a lower end surface of said first comb-shaped electrode being in contact with a surface-part of a material;
a second piezoelectric substrate;
a second comb-shaped electrode formed on an upper end surface of said second piezoelectric substrate; and
a counter electrode cemented between said first- and second piezoelectric substrates, said first comb-shaped electrode and said counter electrode receiving an input electric signal, radiating a longitudinal wave into said material through said surface-part of said material along the direction vertical to said lower end surface of said first piezoelectric substrate, and making an object located inside said material reflect said longitudinal wave back, said second comb-shaped electrode and said counter electrode detecting a reflected longitudinal wave as a delayed electric signal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
-
Specification