CN105030276B - A kind of high-precision heart of fetus monitoring device and method - Google Patents
A kind of high-precision heart of fetus monitoring device and method Download PDFInfo
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- CN105030276B CN105030276B CN201510428836.6A CN201510428836A CN105030276B CN 105030276 B CN105030276 B CN 105030276B CN 201510428836 A CN201510428836 A CN 201510428836A CN 105030276 B CN105030276 B CN 105030276B
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Abstract
The present invention proposes a kind of high-precision heart of fetus monitoring device and method.This method launches the ultrasonic signal of a wideband by the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency of device, and realize that emitted energy converges at launch point, transmitted wave reaches heart of fetus after passing through maternal uterine, the bounce of heart can cause the change of reflection echo reflection position and intensity, high sensitivity array received end receives reflection echo, find heart of fetus by finding reflection reference point, single transmitter, multipath reception is come the heart for fetus of testing and assessing.End of probe of the present invention is a centrum shape, and launch point energy centralization launches continuous broadband signal, snr of received signal is high, and the docking collection of letters number carries out a frequency detecting, and accuracy of detection is high, allow to the examination of early stage progress fetal congenital heart disease, and small is influenceed on fetus.
Description
Technical field
The present invention relates to ultrasonic wave lossless detection technology, and in particular to monitors heart of fetus using Ultrasonic Wave Propagation Character
Apparatus and method.
Background technology
Fetal congenital heart disease abbreviation fetal congenital heart disease.It is reported that fetal congenital heart disease accounts for China's natus
8% ~ 12%, it is meant that there is 120,000 ~ 200,000 children with congenital heart disease birth in China every year, wherein it is complicated, treat hand at present
Section can not still reach good therapeutic effect or early stage easily dead congenital heart disease accounts for 20% after birth, be neonate and childhood
One of major causes of death.According to statistics, 6 be there are about in every 1000 neonates and suffers from congenital heart disease, per capita birth rate
And congenital heart disease rate, estimate that there is 150,000 sick children birth in China every year.Congenital heart disease is harm children and adults
Health and the cruelty " killer " of life.
At present, it can detect whether fetus has Congenital Heart by electrocardiogram or B ultrasound within 18-20 weeks in fetus.If sentenced
Break and not serious easily cure of congenital heart disease and can then continue gestation fetus is born；If the very complicated congenital heart
Popular name for, birth after operation also is difficult to cure, this patient can pregnancy premature termination gestation, this to family, society all
It is helpful.But development of fetus just has heart for 6 weeks in fact, but existing technology must be close to just detect tire in 20 weeks
Whether youngster suffers from congenital heart disease, if detecting with congenital heart disease, because current accuracy of detection is not high, and has cherished
Pregnant nearly 20 weeks, so judging whether seriously and whether terminal pregnancy is all a problem for doctor and household.
To fetus progress Electrocardiography, its general principle is similar with ordinary electrocardiogram, by receiving heart of fetus electro physiology
The electric wave of activity, traces the resultant vector waveform of cardiac electrophysiology activity on electrocardiograph paper.Determining FECG has in utero
Detection and stomach wall detect two kinds, and exploring electrode Via vagina must be inserted uterine cavity by the former, should not be guarded as the pregnancy period.Stomach wall is detected
Exploring electrode is placed in the belly of pregnant woman, the weak current produced by fetal rhythm electric excitation need to pass through amniotic fluid, amniotic cavity, palace wall and mother
Stomach wall can reach the electrode connected with parent body surface, therefore reception signal is very weak, the fetus heart that need to be generally measured after pregnant 16 weeks
Electrograph is just it is observed that more complete waveform, and analysis judgement can be made to FECG areal shape.
B ultrasound detection is carried out to fetus, by launching ultrasonic wave, fetus is reached through female stomach wall, Gong Bi, amniotic cavity, amniotic fluid
Heart of fetus is arrived again, fetus is then passed through after reflection, and reflection is received after amniotic fluid, amniotic cavity, palace wall and female stomach wall
Ultrasonic wave, is thus evaluated and tested to heart of fetus.The precision of current B ultrasound detection heart of fetus is not high, is mainly reflected in：
（1）The reflectance ultrasound ripple weak output signal of reception, is difficult to detect.Because fetus is small, and in the uterus amnion of parent
There is amniotic fluid in intracavitary, uterus, and transmitted wave and reflection echo will pass through female stomach wall, Gong Bi, amniotic cavity and amniotic fluid, therefore propagation path
Long, decay is big, reflectance ultrasound ripple weak output signal.And B ultrasound is that, based on line scanning, transmitted wave is more, runs into different media anti-at present
Penetrate refraction effect serious, reflection echo intensity is small.
（2）The ultrasonic wave of transmitting is pulse, and the duration is short, it is easy to which missing inspection and accuracy of detection are limited.Believed according to Shannon
Breath is theoretical, and the information that signal is carried is directly proportional to the frequency range time width product of signal, because the current transducer of B ultrasound hardware can only be sent
Narrow band signal, if using B ultrasound phased array, its band bandwidth is also limited by phased-array technique, without being greatly improved.Therefore
Limited by its bandwidth so that send the narrow bandwidth of signal, and merely increase frequency can make wearing for the ultrasonic signal of transmitting
Saturating ability dies down, it is impossible to penetrate female stomach wall, uterus.The other pulse duration is again short, it is possible thereby to which the ultrasonic wave of transmitting is carried
Information it is few.To avoid missing inspection, it is necessary to longer observing time, but increase observing time can increase total amount of radiation, to tire
Youngster has an impact.
（3）Detection to the reflectance ultrasound ripple of reception is the detection based on amplitude.Theoretical, the inspection of amplitude according to parameter detecting
Survey accuracy of detection of the precision well below frequency.The accuracy of detection of amplitude is only directly proportional to signal length, and the detection of amplitude is smart
Spend and cube to be directly proportional to signal length.
（4）Because detectable substance is fetus, transmission power is limited, and observing time is limited.The raising of accuracy of detection can pass through
Improve transmission power to improve the signal to noise ratio of transmission signal, one is that can increase the amplitude strength for receiving signal, and two be to carry
The information content that high emission signal is carried.But improving transmission power can cause radiation to increase, and have an impact to fetus.During increase observation
Between, the information content of transmission signal carrying can be improved, while the amplitude detection precision for receiving signal can also be improved, but increase
Observing time can increase total amount of radiation, have an impact to fetus.
To sum up, by transmission signal type, observing time, frequency used, the mutual restriction of certain transmission power and shadow
Ring so that the precision of current B ultrasound detection is not high, there is improved space.
The content of the invention
For the monitoring method precision at present to heart of fetus it is not high so that fetus than it is larger when can just judge whether
With congenital heart disease, the present invention proposes a kind of high-precision heart of fetus monitoring device and method.This method passes through device
The fan-shaped assorted cold dishes formula transmitting terminal of multifrequency launch the ultrasonic signal of a continuous wideband, and realize that emitted energy converges at transmitting
Point, transmitted wave reaches heart of fetus after passing through maternal uterine, and the bounce of heart can cause reflection echo reflection position and intensity
Change, high sensitivity array received end receives reflection echo, heart of fetus is found by finding reflection reference point, then pass through list
Point transmitting, multipath reception is come the heart for fetus of testing and assessing.The present invention is achieved through the following technical solutions：
A kind of high-precision heart of fetus monitoring device, it is characterised in that device include the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency and
The end of probe of high sensitivity array received end composition, and background processing system.Multifrequency sector assorted cold dishes formula transmitting terminal and highly sensitive
Degree array received end fits together the end of probe to form and detect thing contact, and multifrequency sector assorted cold dishes formula transmitting terminal realizes point hair
Penetrate, high sensitivity array received end is to the small neighbourhood around launch point（It is the zonule of neighbouring launch point）Reflection echo enter
Row is received, and the scanning of zonule is carried out with this.End of probe and background processing system can be by wired or wirelessly
Connection.Background processing system be mainly produce the broadband signal sent and the broadband signal of reception is handled, store with
And display.
As the prioritization scheme of above-mentioned high-precision heart of fetus monitoring device, the fan-shaped assorted cold dishes formula transmitting of described multifrequency
End, for handstand centrum shape, its top is stitched together for the fan-shaped assorted cold dishes of many different areas, and the bottom of centrum is the centrum
Convergent point, be also the launch point of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency, emitted energy convergence here, realizing point transmitting, thus band
Carry out larger local pressure, penetrate readily through maternal uterine, realize single transmitter.The material that it is good that the inside of centrum is sound translative performance is filled out
Fill, side surface is wrapped up by non-acoustic window material so that ultrasound is only propagated inside centrum.Multifrequency sector assorted cold dishes formula transmitting terminal is also equipped with
Corresponding radiating circuit unit, realizes the reception that the next broadband signal to be sent is transmitted through to background processing system, caching and divides
Frequency is multiple signals, then carries out power amplification to every road signal.
It is used as the prioritization scheme of above-mentioned high-precision heart of fetus monitoring device, the fan-shaped assorted cold dishes formula transmitting terminal of described multifrequency
Top multiple assorted cold dishes, each assorted cold dishes realize the narrow emission of signal all the way, equivalent to one arrowband probe, and multiple arrowbands are spelled
Be connected together one broadband emitters of composition, it is possible thereby to launch broadband signal, reduces the time for sending signal, is the sight that shortens
The time is examined, to reduce the influence to fetus.Pass through arrowband matching in radiating circuit unit before transmission per road signal
Power amplifier carries out power amplification.
As the prioritization scheme of above-mentioned high-precision heart of fetus monitoring device, described high sensitivity array received end,
For a receiving array, the annular array not waited by several radius sizes is constituted, and each annular array is packaged rear descending
The side surface of the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency is enclosed on, or the ascending array packages of several annular arrays turn into one
Individual circle ring disk, is sticked in the bottom of the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency.High sensitivity array can be surpassed by condenser type micro Process
The probe composition of the polymorphic type such as sonic probe or film.Each annular array is made up of same probe, and each annular array owns
Probe is centered around circularly symmetric distribution, the detection contacted to launch point around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency
The reflection echo of small neighbourhood around point is received.High sensitivity array received end is also equipped with corresponding receiving circuit unit,
Achieve a butt joint the reflection echo denoising received, amplification, and caching is then sent to background processing system and handled.
A kind of high-precision heart of fetus monitoring method, it is characterised in that the monitoring method is fan-shaped by the multifrequency of device
Assorted cold dishes formula transmitting terminal launches the ultrasonic signal of a wideband, and realizes that emitted energy converges at launch point, and transmitted wave passes through mother
Heart of fetus is reached behind body uterus, the bounce of heart can cause the change of reflection echo reflection position and intensity, high sensitivity battle array
Row receiving terminal receives reflection echo, and heart of fetus is found by finding reflection reference point, and then single-point is detected, multipath reception letter
Number come analyze test and appraisal fetus heart.
A kind of high-precision heart of fetus monitoring method, it is characterised in that the monitoring method include find reflection reference point and
Two main processes of multipath reception.It is the cardiac position for finding fetus accurately to find reflection reference point.Multifrequency sector assorted cold dishes formula hair
Penetrate end and carry out point transmitting, if launch point is just to heart, the position of the receiving transducer of the circularly symmetric distribution of annular array any two
Symmetrically, then the reflection position of reflection echo is symmetrical, and the change of intensity is consistent, if not so, then according to the reflection of reflection echo
End of probe is moved in the change of position and intensity, is mobile launch point to find reflection reference point repeatedly.According to circularly symmetric
Two receiving transducers position waveforms of reflection echo for receiving whether consistent with waveform judge whether have found reflection
Reference point.
In the high-precision heart of fetus monitoring method process of multipath reception be after reflection reference point is searched out,
Multifrequency sector assorted cold dishes formula transmitting terminal carries out point transmitting in this position, and the annular array at high sensitivity array received end is visited due to receiving
The position of head is, it is known that the reception of multiple signals can be carried out, therefore this multiple signals can be carried with the technology of space diversity
The signal to noise ratio of high echo-signal, and echo-signal is analyzed by the detection to frequency parameter, accuracy of detection can be improved.
Above-mentioned high-precision heart of fetus monitoring method, comprises the following steps：
（1）Point transmitting broadband ultrasonic signal.Background processing system produces broadband signal, is then sent to the fan-shaped assorted cold dishes of multifrequency
The corresponding circuit unit of formula transmitting terminal, is divided to it as multichannel narrow band signal, then carries out power amplification to every road narrow band signal
Some assorted cold dishes of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency are sent to afterwards.Total transmission signal is again after the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency
A broadband ultrasonic signal is synthesized, and the launch point of energy centralization to the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency is launched, it is complete
Into a transmitting.
（2）Small neighbourhood reflection echo is received.The broadband ultrasonic signal launched of point by female stomach wall, Gong Bi, amniotic cavity,
Amniotic fluid reaches fetus and arrives heart of fetus again, and fetus is then passed through after reflection, by amniotic fluid, amniotic cavity, palace wall and female stomach wall
Received afterwards by high sensitivity array received end.There are several annular arrays at high sensitivity array received end, each annular array
The circularly symmetric distribution of probe, is that all probes are centered around around multifrequency sector assorted cold dishes formula transmitting terminal centrum launch point and symmetrically divided
Cloth, the multipath reflection echo of the small neighbourhood around sensing point contacted to launch point is received, and is each popped one's head in receiving array
The reflection echo of reception is referred to as reflection echo all the way.Multipath reflection echo reception is furnished with after getting off by high sensitivity array received end
Corresponding circuit unit, carry out denoising, amplification, cache after digital collection, be then sent to background processing system and handled.
（3）Receive signal transacting and display.The reception that background processing system is sended over to high sensitivity array received end
Signal is handled.Because the bounce of heart of fetus can cause the change of reflection echo reflection position and intensity, high sensitivity battle array
Row receiving terminal has carried out the reception of multipath reflection echo, is analyzed what is changed over time to every road reflection echo respectively
Position waveform and the waveform changed over time.Finally position waveform and waveform are shown.
（4）Find reflection reference point.The receiving array at high sensitivity array received end, comprising several annular arrays, often
The probe of individual annular array is centered around symmetrical around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency, and each probe connects
Receive reflection echo all the way.Multifrequency sector assorted cold dishes formula transmitting terminal carries out point transmitting, if just to heart, two spies of circularly symmetric distribution
Head is due to positional symmetry, then the reflection position of reflection echo is symmetrical, and the change of intensity is consistent, if not so, then according to reflection
End of probe is moved in the reflection position of echo and the change of intensity, is mobile launch point to find reflection reference point repeatedly.
（5）Reflection echo reception processing to the small neighbourhood near reflection reference point.It is many after searching out reflection reference point
The fan-shaped assorted cold dishes formula transmitting terminal of frequency carries out point transmitting in this position, and high sensitivity array received end carries out multipath reception, utilization space
Diversity technique receives echo-signal, can improve the signal to noise ratio of echo-signal, and analyze by the detection to frequency parameter
Echo-signal, can improve accuracy of detection.
（6）Echo-signal after reception processing is shown there is provided to medical personnel, evaluate and test the heart of fetus.
Compared with existing heart of fetus monitoring device and method, the present invention has advantages below：
（1）Multifrequency sector assorted cold dishes formula transmitting terminal sends signal, and each assorted cold dishes narrow emission is stitched together so that present invention dress
Wideband continuous signal can be launched by putting.The information that wideband continuous signal is carried is more, it is possible to decrease to being passed through during ultrasonic propagation
The signal to noise ratio requirement for the channel gone through, and observing time is reduced, so as to reduce influence of the radiation to fetus.
（2）End of probe is a centrum shape.Be divided into many assorted cold dishes at the top of centrum, the bottom convergence of centrum for a bit,
So cause energy centralization, local pressure is big, penetrates readily through parent to fetus；And make it that the intensity of transmitted wave is big, reflection echo
Amplitude it is big, easily received.
（3）End points transmitting is detected, in the case where not increasing general power, local pressure is improved, observing time can be reduced,
The influence to fetus is reduced, the detection mode of green safety is made, transmitting is put in addition can improve spatial resolution.
（4）Detect end points transmitting, the reflection echo of the small neighbourhood near array multipath reception launch point, beneficial to searching out tire
Reflection reference point residing for youngster's heart.The letter for receiving signal can be improved by searching out multipath reception processing after reflection reference point in addition
Make an uproar ratio.
（5）This method analyzes reception signal by the detection to frequency parameter, can improve accuracy of detection.
（6）The raising of detection accuracy can do sth. in advance examination than existing technology and go out fetal congenital heart disease, so as to terminate
Gestation, is conducive to prenatal and postnatal care.
Brief description of the drawings
Fig. 1 is the operating diagram of the high-precision heart of fetus monitoring device of the present embodiment.
Fig. 2 is the structural representation of the high-precision heart of fetus monitoring device of the present embodiment.
Fig. 3 is the fan-shaped assorted cold dishes formula transmitting terminal schematic diagram of the present embodiment multifrequency.
Fig. 4 (a) is the present embodiment high sensitivity array received end annular array schematic diagram.
Fig. 4 (b) is that the present embodiment high sensitivity array received end annular array is enclosed on the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency
The schematic diagram of side surface.
Fig. 4 (c) is schematic diagram of the present embodiment high sensitivity array received end ring shape array package into a circle ring disk.
Fig. 4 (d) is that the present embodiment high sensitivity array received end ring shape array package is fan-shaped in multifrequency into circle ring disk rear enclosure
The schematic diagram of assorted cold dishes formula transmitting terminal bottom.
Fig. 5 (a) is that the work that the fan-shaped assorted cold dishes formula transmitting of the present embodiment multifrequency is rectified to heart of fetus is illustrated.
Fig. 5 (b) is that work of the fan-shaped assorted cold dishes formula transmitting side of the present embodiment multifrequency to heart of fetus is illustrated.
Fig. 6 is the workflow diagram of high-precision heart of fetus monitoring method.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited to
This.
As shown in figure 1, being the operating diagram of high-precision heart of fetus monitoring device described in the present embodiment.Heart of fetus
Monitoring device includes end of probe 101 and background processing system 102 is constituted, and end of probe includes the fan-shaped assorted cold dishes formula transmitting terminal 103 of multifrequency
With high sensitivity array received end 104.Multifrequency sector assorted cold dishes formula transmitting terminal 103 is also equipped with corresponding radiating circuit unit 105, high
Sensitivity array received end 104 is also equipped with corresponding receiving circuit unit 106.Embodiment end of probe 101 and background processing system
102 wirelessly connect, therefore end of probe 101 is also equipped with wireless transmission unit 107.Radiating circuit unit 105, reception
Circuit unit 106 and wireless transmission unit 107 are placed on the top cover of end of probe.Multifrequency sector assorted cold dishes formula transmitting terminal and highly sensitive
Degree array received end fits together the end of probe to be formed and be contacted with pregnant woman's belly 108, and multifrequency sector assorted cold dishes formula transmitting terminal is realized
Point transmitting, high sensitivity array received end is received to the reflection echo of the small neighbourhood around launch point, and single-point inspection is carried out with this
Survey, multipath reception is analyzed to carry out the scanning of zonule.
As shown in Fig. 2 being the structural representation of high-precision heart of fetus monitoring device described in the present embodiment.Device is by visiting
Survey end and background processing system composition.Multifrequency sector assorted cold dishes formula transmitting terminal and high sensitivity array received end fit together to be formed
With the end of probe of detection thing contact, the collection of front end data is substantially carried out, includes the transmitting and reception of signal.Background processing system
Mainly produce the broadband signal of transmission and the broadband signal of reception is handled, stored and shown.Background processing system
Produce wideband and send signal, by radiating circuit unit, it is multiple signals to realize the reception to the signal, caching and frequency dividing, so
Hou Duimei roads signal carries out power amplification, is then launched by the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency.High sensitivity array connects
The reflection echo that receiving end is received, by receiving circuit unit, achieve a butt joint the reflection echo denoising received, amplification, caching, then
Background processing system is sent to be handled.Embodiment end of probe is wirelessly connected with background processing system, so
Also one wireless transmission unit carries out the transmitted in both directions of data.
As shown in figure 3, being the fan-shaped assorted cold dishes formula transmitting terminal schematic diagram of the present embodiment multifrequency.Multifrequency sector assorted cold dishes formula transmitting terminal,
For handstand centrum shape, its top is stitched together for the fan-shaped assorted cold dishes of many different areas（8 pieces of fan-shaped spellings are illustrated in figure
Disk）, the bottom of centrum is the convergent point of the centrum, is also the launch point of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency, emitted energy convergence
Here, realizing point transmitting, larger local pressure is thus brought, maternal uterine is penetrated readily through, single transmitter is realized, can also be carried
High spatial resolution.
As shown in figure 4, being the present embodiment high sensitivity array received end schematic diagram.High sensitivity array received end connects for one
Receive array, the annular array not waited by several radius sizes is constituted, such as shown in Fig. 4 (a), after each annular array is packaged by
Arrive the small side surface for being enclosed on the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency greatly, or as shown in Fig. 4 (b), several annular arrays by
It is small to be encapsulated into longer spread shown in a circle ring disk such as Fig. 4 (c), stick in the bottom of the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency,
As shown in Fig. 4 (d).High sensitivity array can be made up of the probe of the polymorphic type such as capacitance type micromachined ultrasonic probe or film.
Each annular array is made up of same probe, and each all probes of annular array are centered around the fan-shaped assorted cold dishes formula transmitting terminal vertebra of multifrequency
Circularly symmetric distribution around body launch point, the reflection echo of the small neighbourhood around sensing point contacted to launch point connects
Receive.Shown in Fig. 3 is the annular array that 3 radius sizes are not waited, and wherein the maximum annular array of radius encapsulates 8 film spies
Head（With circle signal）, uniform intervals are symmetrical in annular；Wherein radius annular array placed in the middle encapsulates 4 piezoelectric types
Micro Process is popped one's head in（Illustrated with triangle）, uniform intervals are symmetrical in annular；The wherein minimum annular array encapsulation of radius
4 capacitance type micromachined ultrasonics probes（Illustrated with rectangle）, uniform intervals are symmetrical in annular.
As shown in figure 5, when being that the high-precision heart of fetus monitoring method of the present embodiment finds reflection reference point, by symmetrical
The probe A and probe A of distribution ' the waveform signal that changes over time of the obtained position of acquired reflection echo analysis and intensity
Figure.It is the cardiac position for finding fetus accurately to find reflection reference point.As shown in Fig. 5 (a), multifrequency sector assorted cold dishes formula transmitting terminal is carried out
Point transmitting, launch point is just to heart（Shown in circle stain）, due to receiving transducer A and probe A ' positional symmetry, then reflection echo
Reflection position it is symmetrical, the change of intensity is consistent.As shown in Fig. 5 (b), multifrequency sector assorted cold dishes formula transmitting terminal launch point deviates fetus
Heart, on the left side of heart of fetus, it can be seen that probe A ' the reflection position of reflection echo that receives is than reflection that probe A is received
The reflection position of echo is near, and intensity is strong, at this moment, can move right launch point to continually look for reflection reference point.Note：To compare
The reflection position waveform and waveform of two reflection echos are respectively shown in same oscillogram, and solid line signal probe A is received,
Dotted line signal probe A ' receive.The reflection position and maximum of intensity of signal are all normalized to 1 inside Fig. 5.
As shown in fig. 6, being the workflow diagram of high-precision heart of fetus monitoring method of the present invention.
（1）Point transmitting broadband ultrasonic signal.Background processing system produces broadband signal, is then sent to the fan-shaped assorted cold dishes of multifrequency
The corresponding circuit unit of formula transmitting terminal, is divided to it as multichannel narrow band signal, then carries out power amplification to every road narrow band signal
Some assorted cold dishes of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency are sent to afterwards.Total transmission signal is again after the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency
A broadband ultrasonic signal is synthesized, and the launch point of energy centralization to the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency is launched, it is complete
Into a transmitting.
（2）Small neighbourhood reflection echo is received.The broadband ultrasonic signal launched of point by female stomach wall, Gong Bi, amniotic cavity,
Amniotic fluid reaches fetus and arrives heart of fetus again, and fetus is then passed through after reflection, by amniotic fluid, amniotic cavity, palace wall and female stomach wall
Received afterwards by high sensitivity array received end.There are several annular arrays at high sensitivity array received end, each annular array
The circularly symmetric distribution of probe, is that all probes are centered around around multifrequency sector assorted cold dishes formula transmitting terminal centrum launch point and symmetrically divided
Cloth, the multipath reflection echo of the small neighbourhood around sensing point contacted to launch point is received, and is each popped one's head in receiving array
The reflection echo of reception is referred to as reflection echo all the way.Multipath reflection echo reception is furnished with after getting off by high sensitivity array received end
Corresponding circuit unit, carry out denoising, amplification, cache after digital collection, be then sent to background processing system and handled.
（3）Receive signal transacting and display.The reception that background processing system is sended over to high sensitivity array received end
Signal is handled.Because the bounce of heart of fetus can cause the change of reflection echo reflection position and intensity, high sensitivity battle array
Row receiving terminal has carried out the reception of multipath reflection echo, is analyzed what is changed over time to every road reflection echo respectively
Position waveform and the waveform changed over time.Finally position waveform and waveform are shown.
（4）Find reflection reference point.The receiving array at high sensitivity array received end, comprising several annular arrays, often
The probe of individual annular array is centered around symmetrical around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency, and each probe connects
Receive reflection echo all the way.Multifrequency sector assorted cold dishes formula transmitting terminal carries out point transmitting, if just to heart, two spies of circularly symmetric distribution
Head is due to positional symmetry, then the reflection position of reflection echo is symmetrical, and the change of intensity is consistent, if not so, then according to reflection
End of probe is moved in the reflection position of echo and the change of intensity, is mobile launch point to find reflection reference point repeatedly.
（5）Reflection echo reception processing to the small neighbourhood near reflection reference point.It is many after searching out reflection reference point
The fan-shaped assorted cold dishes formula transmitting terminal of frequency carries out point transmitting in this position, and high sensitivity array received end carries out multipath reception, utilization space
Diversity technique receives echo-signal, can improve the signal to noise ratio of echo-signal, and analyze by the detection to frequency parameter
Echo-signal, can improve accuracy of detection.
（6）Echo-signal after reception processing is shown there is provided to medical personnel, evaluate and test the heart of fetus.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, protection scope of the present invention is included in.
Claims (8)
1. a kind of high-precision heart of fetus monitoring device, it is characterised in that device includes the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency and height
The end of probe of sensitivity array received end composition, and background processing system, multifrequency sector assorted cold dishes formula transmitting terminal and high sensitivity
Array received end fits together the end of probe to form and detect thing contact, and multifrequency sector assorted cold dishes formula transmitting terminal realizes point transmitting,
High sensitivity array received end is received to the small neighbourhood around launch point, and the scanning of zonule, end of probe are carried out with this
Can be by wired or be wirelessly connected with background processing system.
2. high-precision heart of fetus monitoring device according to claim 1, it is characterised in that multifrequency sector assorted cold dishes formula hair
End is penetrated, for handstand centrum shape, its top is stitched together for the fan-shaped assorted cold dishes of many different areas, and the bottom of centrum is the vertebra
The convergent point of body is also the launch point of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency, emitted energy convergence here, realizing point transmitting, thus
Larger local pressure is brought, maternal uterine is penetrated readily through, single transmitter is realized, multifrequency sector assorted cold dishes formula transmitting terminal is also equipped with phase
The radiating circuit unit answered, realizes the reception that the next broadband signal to be sent is transmitted through to background processing system, caching and divides
For multiple signals, power amplification then is carried out to every road signal.
3. high-precision heart of fetus monitoring device according to claim 2, it is characterised in that multifrequency sector assorted cold dishes formula hair
Penetrate multiple assorted cold dishes of the bottom at end, each assorted cold dishes realize the narrow emission of signal all the way, multiple arrowbands are stitched together composition one
Individual broadband emitters, it is possible thereby to launch broadband signal, reduce the time for sending signal, are the observing time that shortens, to reduce
Influence to fetus, carries out power by arrowband power amplifier matching in radiating circuit unit before transmission per road signal and puts
Greatly.
4. high-precision heart of fetus monitoring device according to claim 1, it is characterised in that high sensitivity array received
End, be a receiving array, by several radius sizes not wait annular array constitute, after each annular array is packaged by greatly to
The small side surface for being enclosed on the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency, or the ascending array packages of several annular arrays turn into
One circle ring disk, is sticked in the bottom of the fan-shaped assorted cold dishes formula transmitting terminal centrum of multifrequency, high sensitivity array can be by condenser type micro Process
Ultrasonic probe or thin film head composition, each annular array are made up of same probe, and each all probes of annular array are surrounded
Around the circularly symmetric distribution around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency, the sensing point contacted to launch point
The reflection echo of small neighbourhood is received, and high sensitivity array received end is also equipped with corresponding receiving circuit unit, achieves a butt joint
Reflection echo denoising, the amplification received, caching is then sent to background processing system and handled.
5. a kind of high-precision heart of fetus monitoring method, it is characterised in that the monitoring method is spelled by the multifrequency sector of device
Disc type transmitting terminal launches the ultrasonic signal of a wideband, and realizes that emitted energy converges at launch point, and transmitted wave passes through parent
Heart of fetus is reached behind uterus, the bounce of heart can cause the change of reflection echo reflection position and intensity, high sensitivity array
Receiving terminal receives reflection echo, and heart of fetus is found by finding reflection reference point, is then detected by single-point, multiple signals connect
Receive to analyze the heart of test and appraisal fetus.
6. monitoring method according to claim 5, it is characterised in that the monitoring method includes finding reflection reference point and many
Road receives two main processes, and it is the cardiac position for finding fetus accurately, multifrequency sector assorted cold dishes formula transmitting to find reflection reference point
End carries out point transmitting, if launch point is just to heart, and any two of the circularly symmetric distribution of annular array is popped one's head in due to receiving transducer
Positional symmetry, then the reflection position of reflection echo is symmetrical, and the change of intensity is consistent, if not so, then according to reflection echo
The change of reflection position and intensity move end of probe, be mobile launch point to find reflection reference point repeatedly.
7. monitoring method according to claim 5, it is characterised in that carry out multipath reception, improves the detection essence of reflection echo
Degree, is searched out after reflection reference point, multifrequency sector assorted cold dishes formula transmitting terminal carries out point transmitting in this position, high sensitivity array connects
The annular array of receiving end is because the position of receiving transducer is, it is known that the reception of multiple signals can be carried out, therefore this multichannel can be believed
Number the signal to noise ratio of echo-signal is improved with the technology of space diversity, and echo is analyzed by the detection to frequency parameter
Signal, can improve accuracy of detection.
8. a kind of high-precision heart of fetus monitoring method, comprises the following steps：
（1）Point transmitting broadband ultrasonic signal, background processing system produces broadband signal, is then sent to the fan-shaped assorted cold dishes formula hair of multifrequency
The corresponding circuit unit in end is penetrated, it is divided for multichannel narrow band signal, then every road narrow band signal is carried out to send out after power amplification
Some assorted cold dishes of the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency are given, total transmission signal is synthesized again after the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency
Launch point for a broadband ultrasonic signal, and energy centralization to the fan-shaped assorted cold dishes formula transmitting terminal of multifrequency is launched, and completes point
Transmitting；
（2）Small neighbourhood reflection echo is received, and puts the broadband ultrasonic signal launched by female stomach wall, Gong Bi, amniotic cavity, amniotic fluid
Reach fetus arrive heart of fetus again, then after reflection pass through fetus, by amniotic fluid, amniotic cavity, palace wall and mother stomach wall after by
High sensitivity array received end is received, and there are several annular arrays, the probe of each annular array in high sensitivity array received end
Circularly symmetric distribution, be all probes be centered around it is symmetrical around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency,
The multipath reflection echo of the small neighbourhood around sensing point contacted to launch point is received, and each probe is received in receiving array
Reflection echo be referred to as reflection echo all the way, the phase that multipath reflection echo reception is furnished with after getting off by high sensitivity array received end
The circuit unit answered, caches after carrying out denoising, amplification, digital collection, is then sent to background processing system and is handled；
（3）Receive signal transacting and display, the reception signal that background processing system is sended over to high sensitivity array received end
Handled, because the bounce of heart of fetus can cause the change of reflection echo reflection position and intensity, high sensitivity array connects
Receiving end has carried out the reception of multipath reflection echo, is analyzed the position changed over time to every road reflection echo respectively
Waveform and the waveform changed over time, finally show to position waveform and waveform；
（4）Reflection reference point is found, the receiving array at high sensitivity array received end includes several annular arrays, Mei Gehuan
The probe of shape array is centered around symmetrical around the fan-shaped assorted cold dishes formula transmitting terminal centrum launch point of multifrequency, each probe reception one
Road reflection echo, multifrequency sector assorted cold dishes formula transmitting terminal carries out a point transmitting, if just to heart, two probes of circularly symmetric distribution by
In positional symmetry, then the reflection position of reflection echo is symmetrical, and the change of intensity is consistent, if not so, then according to reflection echo
The change of reflection position and intensity move end of probe, be mobile launch point to find reflection reference point repeatedly；
（5）Reflection echo reception processing to the small neighbourhood near reflection reference point, is searched out after reflection reference point, multifrequency is fanned
Shape assorted cold dishes formula transmitting terminal carries out point transmitting in this position, and high sensitivity array received end carries out multipath reception, utilization space diversity
Technology receives echo-signal, can improve the signal to noise ratio of echo-signal, and analyze echo by the detection to frequency parameter
Signal, can improve accuracy of detection；
（6）Echo-signal after reception processing is shown there is provided to medical personnel, evaluate and test the heart of fetus.
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| GB0817389D0 (en) * | 2008-09-23 | 2008-10-29 | Huntleigh Technology Ltd | Fetal heart monitoring |
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