close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JPH03242136

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH03242136
[0001]
[Object of the Invention] (Industrial field of application) The present invention relates to an
ultrasonic probe having a piezoelectric member disposed on a packing material and having a
matching layer and an acoustic lens on the piezoelectric member. (Prior Art) In an ultrasonic
diagnostic apparatus, there are linear scanning, sector scanning and the like. In linear scanning,
an array type ultrasound probe (hereinafter referred to as an ultrasound probe) in which a
plurality of ultrasound transducers are arranged in parallel. ), And a plurality of ultrasonic
transducers are taken as one unit, and the ultrasonic transducers are excited to transmit an
ultrasonic beam. For example, this method electronically shifts the transmission point position of
the ultrasonic beam by exciting so that the positions of the elements of one unit are sequentially
changed while sequentially shifting the pitch by one transducer. It is a moving scan. Then, so that
the ultrasonic beam is focused, the ultrasonic transducers to be excited shift the timing of the
excitation between the one located at the center of the beam and the one located at the side, and
the resulting ultrasonic vibration The reflected ultrasonic waves are electronically focused using
the phase difference of each generated sound wave of the child. Then, the reflected ultrasound is
received by the same transducer as the excitation and converted into an electric signal (however,
the number of transducers used for transmission and reception is not necessarily the same), and
each transmission and reception is performed. The echo information according to the above is
formed as, for example, a tomographic image, and the image is displayed on a TV monitor or the
like. In addition, for the sector scan, the excitation timing of each transducer is desired so that the
transmission direction of the ultrasound beam is sequentially changed into a fan shape for each
pulse of the ultrasound beam for the ultrasound transducer group to be excited. And the
subsequent processing is basically the same as the linear scanning described above. The
ultrasonic probe described above comprises ultrasonic transducers 1-1 to 1-N which are
juxtaposed and electrically separated as shown in FIG. 3. These ultrasonic transducers 1-1 to 1-N
13-04-2019
1
Are connected to switching circuits 3 for selectively switching ultrasonic transmission / reception
signals via signal lines 2 provided corresponding to the above. When a driving pulse is applied to
the ultrasonic transducers 1-1 to 1-N from the pulsar (not shown) through the switching circuit
3, ultrasonic waves are generated from the ultrasonic transducers 1-1 to 1-N. Also, the ultrasonic
probe is a piezoelectric ceramic 5 ░ as a piezoelectric member for converting pressure from the
outside into electricity. A matching layer for matching the acoustic impedance between the
piezoelectric ceramic 5 and a living body. An acoustic lens 7 provided on the matching layer 6 is
disposed.
By driving each of the ultrasonic transducers 1-1 to 1-N via the switching circuit 3 by a pulser
(not shown) such an ultrasonic probe, ultrasonic waves are transmitted / received to an object
(not shown). Then, the reflected ultrasonic waves received by the ultrasonic probe are output
after the preamplifier (not shown) in the ultrasonic diagnostic apparatus main body and
converted into electric signals to form echo information by each transmitted and received wave
as, for example, a tomographic image. Images can be displayed on a TV monitor or the like. By
the way, in order to electrically connect the ultrasonic transducers 1-1 to 1-N to the ultrasonic
diagnostic apparatus main body (not shown), a multi-core cable consisting of a plurality of core
wires corresponding to the number of ultrasonic vibration elements is used. It is used. FIG. 4 is a
schematic view showing an example of such a multi-core cable. This multicore cable needs to be
thin and flexible in terms of operability. Therefore, for example, as shown in FIG. 5 (b), 16 core
wires U3-1 to U3-16 are twisted together as shown in FIG. 4 to form one multi-core cable, and
this multi-core cable is formed. It was thin and flexible. Further, as shown in FIG. 5 (a), a multicore cable is bound by eight units and is passed through one cylinder 10 to connect the
ultrasonic transducer 1 to the ultrasonic diagnostic apparatus main body. The (Problems to be
Solved by the Invention) However, in a conventional multi-core cable as shown in FIG. 4, first, the
multi-core cable consisting of a plurality of core wires is twisted and then both ends of the multicore cable are cut. The core wire of the above was connected to the connector provided on the
ultrasonic diagnostic apparatus main body side. For this reason, depending on how to twist a
plurality of core wires, for example, a short route core wire U3-3 and a long route core wire U31. U3-2 will occur. That is, if the lengths of the core wires are different, the transmission time will
be different. That is, the delay time changes by the difference of the cable length with respect to
the signal delay time of the transmission / reception delay circuit provided on the apparatus
main body side, and this causes a problem that the image quality is deteriorated. Therefore, an
object of the present invention is to provide an ultrasonic probe capable of improving the image
quality by eliminating the difference in signal transmission delay time due to the difference in
cable length by equalizing the length of the multicore cable. . [Configuration of the Invention
(Means for Solving the Problems)] The present invention has taken the following measures in
order to solve the problems and achieve the object. That is, according to the present invention, a
piezoelectric member, a matching layer, and an acoustic lens are disposed on a packing material,
and a probe main body capable of transmitting and receiving ultrasonic waves with a plurality of
13-04-2019
2
ultrasonic transducers obtained by finely dividing the piezoelectric member An ultrasonic probe
comprising: a multicore cable in which some of a plurality of core wires corresponding to the
ultrasonic transducers are twisted together into one in order to connect an ultrasonic diagnostic
apparatus to the main body of the ultrasonic probe; It is characterized in that the lengths of the
core wires are all made constant, and then they are twisted to adjust the length of each core wire
at the end edge of the multi-core cable so as to be constant.
(Operation) By taking such measures, the following effects are exhibited. Since the lengths of the
respective core wires of the multi-core cable are all made constant, then they are twisted
together, and then the lengths of the respective core wires at the end edge of the multi-core cable
are adjusted to be constant. Therefore, the accuracy of delay time control can be improved, and
the transmission signal and reception signal up to the ultrasonic transducer can be transmitted
and received properly in time as the signal delay control on the apparatus main body side, and as
a result the image quality Can be improved. Embodiment An embodiment of the ultrasonic probe
according to the present invention will be described below. FIG. 1 is a schematic view showing an
ultrasonic probe according to the present invention. The same parts as those shown in FIGS. 3 to
5 are denoted by the same reference numerals, and the details thereof will be omitted. In FIG. 1,
the ultrasonic probe is configured as follows. That is, as the probe main body 1, the piezoelectric
ceramic 7 as the piezoelectric member and the matching layer 6 on the packing material 4. A
lens 8 is disposed. The probe main body 1 has a plurality of juxtaposed ultrasonic transducers 11 to 1-N electrically separated from each other, and the ultrasonic transducers 1-1 to 1-N can
transmit and receive ultrasonic waves. It has become. Further, the probe main body 1 is a flexible
printed circuit (hereinafter referred to as ?FPC 12?) for signal lines provided corresponding to
the respective ultrasonic transducers 1-1 to 1-N. ) Is connected to the connector 13a 13b. Pins
corresponding to the ultrasonic transducers are provided at lower ends of the connectors 13a
and 13b, and pin holes corresponding to the pins are also provided in the connectors 14a and
14b. The pins of the connectors 1 '3a and 13b can be detachably attached to the pin holes of the
connectors 14a and 14b. Further, at the lower end of the connectors 14a and 14b, a plurality of
core wires corresponding to the pin holes, for example, U2-1 ░ U3-1 are provided. For example,
as shown in FIG. 5, 16 core wires U3-1 to U3-16 form one multi-core cable U3 or the like. A
plurality of core wires corresponding to the respective ultrasonic transducers are formed by
multi-core cables U1 to U8 of eight units. The multicore cables U1 to U8 are twisted and inserted
into the cylinder 10. Next, the features of the present embodiment will be described. FIG. 2 is a
figure for demonstrating the effect | action of a present Example. The present embodiment is
characterized in that the lengths of the respective core wires of the multicore cables U1 to U8 are
all fixed, and then they are twisted, and then the end edges of the multicore cables U1 to U8
(connector 17 side) In that the length adjustment unit 20 is provided to adjust the length of each
core wire in the above to be constant.
13-04-2019
3
That is, according to the present embodiment, first, each core wire is extended straight to make
the lengths the same, and in this state, each core wire is cut. Thereafter, even if the respective
core wires are twisted, since all the core wires have the same length, a difference in transmission
delay time for each ultrasonic transducer does not occur. Therefore, the accuracy of delay time
control can be improved. As a result, the transmission signal and the reception signal up to the
ultrasonic transducer can be transmitted and received properly in time as the signal delay control
on the apparatus body side, and as a result, the image quality can be improved. In general, the
ultrasonic diagnostic apparatus performs delay control for each ultrasonic transducer to
electrically narrow the ultrasonic beam, but in an actual multicore cable, there is a difference of
40 cm in length to 4 m in length . The difference in length generates a delay time error of about
n5 ec, but according to this embodiment, the lengths up to the respective core lines can be made
equal, so that the accuracy of the delay time control can be improved. . Further, in the inside of
the connector 17, there is provided a length adjusting portion 20 for adjusting the length of each
core wire so as to be constant. That is, even if the lengths of the respective core wires are all the
same, a difference in length occurs between the respective core wires at the end of the multicore
cable (the input side of the connector 17) by twisting the core wires. When the core wire is long,
it can be wound around the cylinder by one or several turns to adjust the short core wire and the
length by using the length adjustment unit 20, so the mounting of the core wire at the output
terminal of the connector 17 is a part Become. As described above, according to the present
embodiment, the lengths of the respective core wires of the multi-core cable are all fixed, and
then they are twisted, and then adjusted so that the lengths of the respective core wires at the
end edge of the multi-core cable are constant. Therefore, since the lengths of the respective core
wires can be made constant, the accuracy of delay time control can be improved, and the
transmission signal and the reception signal up to the ultrasonic transducer are controlled
according to the signal delay control on the apparatus main body side. It is possible to transmit
and receive correctly in time, and as a result, the image quality can be improved. The present
invention is not limited to the embodiments described above. In the embodiment described
above, the length of the core wire is adjusted by the adjustment unit 20 in the connector 17.
However, for example, in the probe head portion, the length of the core wire is processed by
winding and the length is made constant. good. In addition, various modifications can be made
without departing from the scope of the present invention. [Effects of the Invention As described
above, according to the present invention, the lengths of the respective core wires of the multicore cable are all fixed and then they are twisted, and then the lengths of the respective core
wires at the end edge of the multi-core cable are Since adjustment is performed so as to be
constant, the lengths of the respective core wires can be made constant, so that the accuracy of
delay time control can be improved, and the transmission signal and reception signal up to the
ultrasonic transducer can be signal delay on the device main body side As controlled, it is
possible to provide an ultrasound probe that can transmit and receive properly in time, and as a
result can improve the image quality.
13-04-2019
4
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a schematic view showing an embodiment of the ultrasonic probe according to the
present invention, FIG. 2 is a view for explaining the operation of the ultrasonic probe shown in
FIG. 1, and FIG. FIG. 4 is a schematic diagram showing a plurality of multi-core cables provided in
a cylinder, and FIG. 5 is a schematic diagram showing a multi-core cable comprising a plurality of
core wires.
1 ии Probe body, 1-1 to 1?N иии ultrasonic transducer, 2 иии signal line, 3 иии switching circuit, 4 иии
packing material, 5 иии piezoelectric ceramic, 6 ... Matching layer, 7 ... Lens, U1 to U8 ... Multi-core
cable, 12 ...-FPC. 17 иии Connector, 20 иии Length adjustment section.
13-04-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
description, jph03242136
1/--страниц
Пожаловаться на содержимое документа