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DESCRIPTION JPS56167684

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DESCRIPTION JPS56167684
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a vibrator
structure according to an embodiment of the present invention, FIG. 2 is a view showing a state
of resonance frequency of each vibrator in the same block 1, FIG. The figure is also a diagram
showing the state of the resonance frequency when the respective transducers of the same type
are connected in parallel by lead wires. 1.2 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · lead
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic
probe used in an electronic scanning type medical ultrasonic wave @ layer imaging apparatus,
and aims at broadening the band. In the case of the electronic scanning system, there are two
types, one in which only one electrode of the vibrator is divided or one in which the vibrator is
divided, but the present invention is the one in the latter case). It is known that the resonant
frequency fr of the vibrator is determined by the ratio of Ml / T, where T1 is the width of the
vibrator and W is the cutting width. This invention pays attention to this and is based on the
broadband-ization of a super:-+ 1 zo 2 acoustic probe. That is, according to the present invention,
the cutting widths W1 and W2 of the vibrator of thickness T having the electrodes on both sides
within 1 pro 7 each. ... When dividing into n strips in place of Wn, the resonant frequency fr is
determined by the ratio of W / T When looking at the resonant frequencies of the individual
vibrators in one block, fr + (Wl / T), f ′ ′ x ('W' 2 / T), '' frn (wn / T), and it is a collection of
oscillators having n resonance frequencies. When the electrodes of the child are connected in
parallel by lead wires, the resonance frequency fr of one block becomes a value close to the
range of frr to frn, and a vibrator having a wide band resonance frequency can be obtained. If an
ultrasonic probe in which these are arranged in m blocks is manufactured, it becomes a wide
band ultrasonic probe, circuits of various frequencies and matching can be taken, and ultrasonic
probes are designed respectively for circuits of various wave numbers. We can cope with one
product without doing ha] 5. "::::::: Two: Two :: Two = seven ,. The ultrasonic probe is divided into
mX n, individual strip-like transducers, and the electrodes of n strip-like vibrating triodes are
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connected in parallel with the lead wires to form one block, and an m-block array of ultrasonic
probes is provided. Although it was used, the resonant frequency band was narrow, and circuits
capable of matching were limited. The transducer structure and the state of one resonance wave
number according to an embodiment of the present invention will be described with reference to
FIGS. 1 to 3. FIG. Here, in order to make the description easy to understand, the number n of
oscillators in one block is four. The vibrator 3 having the electrodes 1 and 2 on both sides, the
cutting width W. ... Change to w4 and divide into strips, turn it back m times, and set the number
of divisions to 4 × m. The resonance frequency of the four vibrators in one block is determined
by the ratio of (cutting width W) / (thickness f of the vibrator), so that the vibrator of ya 1 is, as
shown in the second bad, # 1. The vibrator of A2 is frs, and the vibrator of 43 is fx3. As shown in
FIG. 3, the resonance frequency of the A1 transducer 1 and 2 in the 1 block of the transducer A4
and the transducer 1 and 2 in the 1 block is connected to the row and the read wire 4 is
connected. It becomes a wide frequency band close to the range of the resonance frequency f ′
′ i of the resonator of the vibrator of the bar 4 to the resonance river wave number ft + of the
vibrator of the bar 1.
If an ultrasonic probe in which m blocks of the above-mentioned 4 blocks are arranged is
manufactured, it has a very wide resonance frequency. As described above, the present invention
is configured, and circuits and matching of various frequencies can be obtained with a simple
configuration, and without designing an ultrasonic probe for circuits of various frequencies, 1 It
offers the advantage of being compatible with two ultrasound probes and is of very high practical
value.
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