CN104586434B - The method and device of fetal rhythm Doppler signal acquisition quality is promoted during fetal movement - Google Patents
The method and device of fetal rhythm Doppler signal acquisition quality is promoted during fetal movement Download PDFInfo
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Abstract
A kind of method that the present invention relates to promote fetal rhythm Doppler signal acquisition quality during fetal movement, in comprising the steps: the setting time during monitoring fetal rhythm, the envelope of the fetal movement Doppler signal collected is carried out computing or process, obtains representing the fetal movement eigenvalue of fetal movement situation；The fetal movement eigenvalue obtained described in Bi compare and the size of default fetal movement threshold value, fetal movement threshold value as described in fetal movement eigenvalue is more than or equal to, it is judged that for being currently at the fetal movement phase, increase the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap；Otherwise, it is judged that for being in the non-fetal movement phase, reduce above-mentioned filter order.The invention still further relates to a kind of device realizing said method.Implement to promote during the fetal movement of the present invention method and device of fetal rhythm Doppler signal acquisition quality, have the advantages that it eliminates Fetal Movement Signal to a certain extent and is relatively easy to interference, the subsequent treatment of fetal rhythm Doppler signal.
Description
Technical field
The present invention relates to the signal processing field of Medical Instruments, more particularly, it relates to it is many to promote fetal rhythm during a kind of fetal movement
The method and device of general Le signals collecting quality.
Background technology
Ultrasonic Doppler fetal monitor is by launching ultrasonic signal, then receives the ultrasonic echo from heart of fetus
Signal, judges the current state of fetus.Because heart of fetus is ceaselessly being beaten, utilize principle of Doppler, echo
Signal has certain frequency shift (FS), and ultrasonic Doppler fetal monitor demodulates amplifying circuit, from ultrasound wave by utilizing echo
Parse this frequency offseting value.Owing to this value is corresponding with fetus heart beating, so utilizing this frequency offset signal just can pass through
Further process the heart rate value obtaining fetus.But, during monitoring fetal rhythm, often occur fetus at pregnant woman uterus
The situation of interior activity, this situation is commonly referred to fetal movement.During fetal movement, fetal heart rate signal may be by the Doppler signal (frequency of fetal movement
Lower than fetal rhythm Doppler signal) disturb and even flood, the fetal rhythm Doppler signal obtained will be deteriorated.This factor makes collection
To fetal heart sound Doppler signal can be much smaller compared to when there is not fetal movement, even much smaller than dynamic range lower limit, signal
Detected at all less than.And existing fetal monitor generally will not take appropriate measures for this situation, this situation makes
Cause can not get preferable fetal rhythm Doppler signal due to the interference of fetal movement Doppler signal when obtaining fetal movement, and then cause counting
Calculate fetal heart frequency curve so that effect and the efficiency of fetal monitoring are all affected.At fetal rhythm doppler audio signal filtering electricity
Always with maximum low frequency suppression on road, although the problems referred to above can be alleviated to a certain extent, but there is no fetal movement, fetal rhythm
The when that signal itself being more weak, then may obtain because low-frequency filter exponent number too much causes useful fetal rhythm Doppler signal to be decayed
Excessive, it is unfavorable for follow-up process.So, in general, the method for existing fetal rhythm Doppler signal collection has easily
The shortcoming that the fetal movement Doppler signal brought by fetal movement disturbs, makes subsequent treatment become more difficulty.
Summary of the invention
The technical problem to be solved in the present invention is, is easily subject to, for prior art above-mentioned, the fetal movement that fetal movement brings many
General Le signal disturbing, make subsequent treatment become more difficulty defect, it is provided that one eliminates Fetal Movement Signal to a certain extent
Interference, subsequent treatment promote the method and device of fetal rhythm Doppler signal acquisition quality when being relatively easy to fetal movement.
The technical solution adopted for the present invention to solve the technical problems is: promote fetal rhythm Doppler letter during a kind of fetal movement of structure
The method of number acquisition quality, comprises the steps:
A), in the setting time during monitoring fetal rhythm, the envelope of the fetal movement Doppler signal collected is carried out computing
Or process, obtain representing the fetal movement eigenvalue of fetal movement situation；
B) compare described in the fetal movement eigenvalue that obtains and the size of fetal movement threshold value preset, as fetal movement eigenvalue more than or etc.
In described fetal movement threshold value, it is judged that for being currently at the fetal movement phase, perform step C)；Otherwise, it is judged that for being in the non-fetal movement phase, perform step
Rapid D)；
C) increase the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return step A)；
D) reduce the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return step A).
Further, described fetal movement eigenvalue be the fetal movement Doppler signal collected envelope value and, described tire
The dynamic meansigma methods of Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler
Any one in the integrated value of signal envelope value；The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue
Suitable.
Further, it is judged that when currently whether being in the fetal movement phase, farther include: repeatedly obtain fetal movement eigenvalue, and
Repeatedly with default fetal movement threshold ratio relatively, be all higher than such as it or equal to as described in fetal movement threshold value, it is judged that for being currently at the fetal movement phase；As
It is respectively less than described fetal movement threshold value, it is judged that be currently at the non-fetal movement phase.
Further, the kind of the fetal movement threshold value of the described fetal movement eigenvalue repeatedly obtained and correspondence thereof is identical or not phase
With.
Further, described step C) farther include:
C1) the exponent number whether maximum of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap is judged, as
It is to return step A)；Otherwise, the suppression of described fetal rhythm doppler audio filter circuit medium and low frequency is increased according to a step-length set
The exponent number of wave filter, and return step A).
Further, described step D) farther include following steps:
D1) the exponent number whether minima of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap is judged, as
It is to return step A)；Otherwise, the suppression of described fetal rhythm doppler audio filter circuit medium and low frequency is reduced according to a step-length set
The exponent number of wave filter, and return step A).
The invention still further relates to a kind of device realizing said method, including:
Fetal movement eigenvalue acquisition unit: within the setting time during monitoring fetal rhythm, the fetal movement to collecting is many
The envelope of general Le signal carries out computing or process, obtains representing the fetal movement eigenvalue of fetal movement situation；
Fetal movement eigenvalue comparing unit: be used for the big of the fetal movement eigenvalue obtained described in comparing and the fetal movement threshold value preset
Little, fetal movement threshold value as described in fetal movement eigenvalue is more than or equal to, it is judged that for being currently at the fetal movement phase, call low frequency suppressing filter
Exponent number increases unit；Otherwise, it is judged that for being in the non-fetal movement phase, call low frequency suppressing filter exponent number and reduce unit；
Low frequency suppressing filter exponent number increases unit: be used for increasing the suppression filter of fetal rhythm doppler audio filter circuit medium and low frequency
The exponent number of ripple device；
Low frequency suppressing filter exponent number reduces unit: be used for reducing the suppression filter of fetal rhythm doppler audio filter circuit medium and low frequency
The exponent number of ripple device；
Wherein, described fetal movement eigenvalue acquisition unit is obtained ultrasonic echo signal by the ultrasound probe of monitor, takes
Go out fetal movement Doppler signal therein and eigenvalue, and be transferred to described eigenvalue comparing unit；Described eigenvalue comparing unit
Described low frequency suppressing filter exponent number will be output a control signal to according to its comparative result and increase unit or the suppression filter of described low frequency
Ripple device exponent number reduces unit.
Further, described fetal movement eigenvalue be the fetal movement Doppler signal collected envelope value and, described tire
The dynamic meansigma methods of Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler
Any one in the integrated value of signal envelope value；The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue
Suitable.
Further, described ultrasonic probe power increase unit farther includes: be used for judging that current ultrasonic is popped one's head in
The maximum judge module launching driving voltage whether maximum；Described ultrasonic probe power reduction unit farther includes:
For the minima judge module launching driving voltage whether minima judging that current ultrasonic pops one's head in.
Implement to promote during the fetal movement of the present invention method and device of fetal rhythm Doppler signal acquisition quality, have following useful
Effect: owing to having taken out fetal movement Doppler signal from the mixed signal of fetal rhythm Doppler signal and fetal movement Doppler signal, and
It is obtained fetal movement eigenvalue through process, by it with the fetal movement threshold ratio set relatively, it becomes possible to relatively accurately judge fetus
Whether it is in fetal movement state；Again according to current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap state to its exponent number
It is adjusted so that this monitor can obtain accurate fetal heart rate signal as much as possible when fetal movement；Simultaneously non-to being in
Fetus during fetal movement reduces the exponent number of this wave filter so that can it accurately be taken out under more weak fetal heart rate signal, convenient
Subsequent treatment.Therefore, it eliminates Fetal Movement Signal to the interference of fetal rhythm Doppler signal, subsequent treatment more to a certain extent
Easily.
Accompanying drawing explanation
The method in the method and device embodiment of fetal rhythm Doppler signal acquisition quality is promoted when Fig. 1 is fetal movement of the present invention
Flow chart；
Fig. 2 is the flow chart obtaining fetal movement eigenvalue in described embodiment；
Fig. 3 is the concrete steps increasing driving voltage in described embodiment；
Fig. 4 is the structural representation of device in described embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
As it is shown in figure 1, the method and device promoting fetal rhythm Doppler signal acquisition quality when the fetal movement of the present invention is implemented
In example, the method comprises the steps:
Step S11 processes ultrasonic reflections signal, obtains fetal movement Doppler signal, processes it, obtains fetal movement eigenvalue:
In the present embodiment, it is first begin to the monitoring to fetus, namely uses fetal ultrasound Doppler's monitor that fetus is supervised
Protect, start fetus is launched ultrasound wave, beat due to heart of fetus and the frequency of ultrasonic echo signal is offset, connect
Receive its echo, this ultrasonic echo be converted to the signal of telecommunication and it is processed, thus obtaining fetal heart rate signal.The signal obtained
The fetal heart rate signal that actually in a mixed signal, i.e. this signal, existing expression heart of fetus is beated, also has expression fetus to exist
The Fetal Movement Signal of movement in uterus.In like manner, in the case of fetus is not moved, ultrasonic echo signal represents the letter of fetal movement
Number component (frequency shift (FS)) is smaller, and represents that the component of fetal heart rate signal is bigger；And in the case of fetal movement, above-mentioned fetal movement is believed
Number component just the biggest, and represent that the component of fetal heart rate signal is smaller.From the point of view of on Ji Ben, when heart of fetus moves or fetus body
When body moves, cause the frequency of echo-signal to offset, thus obtain different ultrasonic frequency shifted signals.Believe at echo
In number, above-mentioned two Doppler frequency signal (or component of signal) mixes.In this step, above-mentioned mixing is believed
Two components in number separately, namely obtain the Doppler signal (or Doppler frequency deviation signal) caused by fetal movement.For adopting
The above-mentioned fetal movement Doppler signal of collection a period of time carries out computing, just obtains representing the fetal movement eigenvalue of current fetal movement state.?
In the present embodiment, fetal movement eigenvalue is that the envelope that above-mentioned a period of time collects Fetal Movement Signal carries out computing.At the present embodiment
In, this feature value can be in the time period envelope value of fetal movement Doppler signal and, fetal movement Doppler signal in the time period
The meansigma methods of envelope value, the quadratic sum of the envelope value of fetal movement Doppler signal or fetal movement Doppler signal in the time period in the time period
Envelope value integrated value in any one.If the envelope of fetal movement Doppler signal is Ii, then form at N number of unit of time
Time period in,
The envelope value of fetal movement Doppler signal and be
The meansigma methods of the envelope value of fetal movement Doppler signal is
The quadratic sum of the envelope value of fetal movement Doppler signal is
The integrated value of the envelope value of fetal movement Doppler signal is
I.e. when the fetal movement eigenvalue selected is any of the above described one, just the envelope of fetal movement Doppler signal is carried out above-mentioned
The computing that the expression formula of its correspondence represents, obtains the fetal movement eigenvalue of its correspondence.
Step S12 judges whether the fetal movement eigenvalue obtained is more than or equal to the fetal movement threshold value set, in this way, it is judged that fetus
It is currently at fetal movement state, performs step S13；Otherwise, it is judged that fetus is currently at non-fetal movement state, step S14 is performed；At this
In embodiment, fetal movement threshold value is one and is previously set and the value corresponding with the fetal movement eigenvalue kind selected.Even because
In the case of the envelope of fetal movement Doppler signal is identical, select different fetal movement eigenvalue kinds, the eigenvalue obtained
All may be different, so the threshold value of its correspondence also can be different.Such as, in the case of identical envelope, select fetal movement eigenvalue
Be fetal movement Doppler signal envelope value and in the case of, be fetal movement Doppler signal in the time period with selecting fetal movement eigenvalue
Envelope value meansigma methods in the case of, the fetal movement eigenvalue obtained is different, therefore, the fetal movement threshold value under both of these case
Also the most different.In the case of judging that current fetus is in fetal movement, perform step S13；When judging that fetus is in the feelings of non-fetal movement
Under condition, perform step S14.It is noted that under certain situation in the present embodiment, above-mentioned judgement fetal state can be
Compare with the fetal movement threshold value set after obtaining a fetal movement eigenvalue, obtain the state of current fetus；And at other
In the case of, it is also possible to it is within multiple time periods, obtain repeatedly fetal movement eigenvalue, respectively with the fetal movement threshold ratio set relatively, many
In the case of secondary result of the comparison is consistent, just draw the judgement of above-mentioned fetal state.Repeatedly fetal movement eigenvalue is obtained also above-mentioned
During with setting fetal movement threshold ratio relatively, the kind that its fetal movement eigenvalue selects can be one species, it is also possible to be different kinds,
Now, the fetal movement threshold value every time compared also to occur to change accordingly, and the kind of the fetal movement eigenvalue selected with it is suitable.
Step S13 increases the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap: in this step, by
Be currently at fetal movement state in the fetus judging to be guarded, therefore above-mentioned by the echo-signal obtained on ultrasound probe in take
The fetal movement Doppler signal component produced with moving due to fetus in a large number, the speed moved due to fetus is generally slower than fetus
The speed of heart beating, and the mildest, irregular, thus its Doppler signal be generally focused on more low frequency part (relative to
For fetal rhythm Doppler signal), so the rank of low frequency suppressing filter when needing increasing acquirement fetal rhythm doppler audio signal
Number (this low frequency suppressing filter is an adjustable multistage low-frequency filter of exponent number), strengthens the effect that low frequency is suppressed by this wave filter
Really, to obtain the most clearly fetal heart rate signal.As for the concrete steps of increasing driving voltage, describe in detail after a while.Perform this step
After, return step S11, start monitoring and fetal rhythm, the acquirement of Fetal Movement Signal of next round.
Step S14 reduces the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap: in this step, by
It is currently at non-fetal movement state, so above-mentioned echo-signal moves, due to fetus, the fetal movement caused in the fetus judging to be guarded
Doppler component is less, even if reducing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, it is also possible to
To the most clearly fetal heart rate signal.As for the concrete steps of minimizing driving voltage, describe in detail after a while.After having performed this step, return
Step S11, starts monitoring and fetal rhythm, the acquirement of Fetal Movement Signal of next round.
As in figure 2 it is shown, in the present embodiment, more specifically, its step obtaining fetal movement eigenvalue includes:
Step S21 obtains the ultrasonic echo of reflection, and is converted into the signal of telecommunication: in this step, by monitor
Ultrasound probe is arranged on by the abdominal part relevant position of monitoring anemia of pregnant woman so that it is the ultrasonic signal of transmitting is irradiated to fetus, and produces
Raw echo, this echo makes due to heart beating or the moving of fetal body of fetus its frequency that certain deviation occurs, works as ultrasound wave
After probe receives above-mentioned echo, it is converted into the signal of telecommunication.
This signal of telecommunication is demodulated by step S22, obtains the mixing letter of fetal rhythm Doppler signal and fetal movement Doppler signal
Number: in this step, the signal of telecommunication obtained above is demodulated, i.e. removes ultrasound wave carrier frequency therein, obtain including
Fetal rhythm Doppler signal and the mixed signal of fetal movement Doppler signal.
Mixed signal is filtered by step S23, obtains the envelope of fetal movement Doppler signal: by the fetal rhythm in mixed signal
Doppler signal is decayed and filters, and obtains fetal movement Doppler signal, for carrying out the eigenvalue calculation of fetal movement.It is worth mentioning
, above-mentioned mixed signal also will be separated after a road carries out low frequency filtering, obtain fetal rhythm Doppler signal.
The computing that above-mentioned envelope is set or selectes by step S24, obtains fetal movement eigenvalue: to above-mentioned fetal movement Doppler
The envelope of signal carries out above-mentioned setting or selected computing, obtains fetal movement eigenvalue.
As it is shown on figure 3, in the present embodiment, the step launching driving voltage increasing ultrasound probe includes:
Step S31 obtains the exponent number of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, it is judged that it is
No for maximum: in this step, obtain the exponent number of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap,
Judge that this value whether this wave filter allows the maximum of exponent number, in this way, then it represents that can not be adjusted this exponent number again, jump to
Step S33；It not the maximum allowed such as current exponent number value, then it represents that the exponent number of this low frequency suppressing filter can be carried out
Regulation, performs step S32.
Step S32 increases the exponent number of this wave filter according to the step-length set: in this step, in this step, to above-mentioned
The exponent number of low frequency suppressing filter is adjusted so that it is increasing, the increase of this filter order can make it for low frequency signal
Suppression more preferable, i.e. the suppression to fetal movement Doppler signal is more preferable, it is possible to obtain the fetal rhythm Doppler signal of better quality.At this
In embodiment, the amplitude (or step-length) of a regulation is previously set, during regulation, has the most only been to increase an amplitude set every time,
This exponent number can be gradually increased during repeatedly regulation, it is to avoid the amplitude of accommodation is excessive bring to extracting fetal rhythm Doppler
The adverse effect of audio signal, such as, the bigger amplitude of accommodation may make to become the acquirement of fetal rhythm Doppler signal more
Difficulty.Such as, if this exponent number maximum is 5, amplitude or the step-length of regulation every time are 1, in the case of current exponent number is 3, adjust
Joint this filter order the most afterwards becomes 4.After having performed this step, return step S11.
Step S33 does not adjust the exponent number value of low frequency suppressing filter: in this step, not to above-mentioned low frequency suppressing filter
Exponent number be adjusted, after having performed this step, will return step S11.
It is noted that in the case of judging that fetus is in non-fetal movement state, also can be to the suppression filtering of above-mentioned low frequency
The exponent number of device is adjusted so that it is reduce.Concrete step also can above-mentioned steps similar, difference is, first to the lowest
Frequently the exponent number of rejects trap judges, it is judged that whether it is minimum exponent number, in this way, directly returns step S11, not to it
It is adjusted；As no, then similar to above-mentioned steps S32, reduce an exponent number setting step-length every time.
Additionally, the present embodiment further relates to a kind of device realizing said method.As shown in Figure 4, this device includes that fetal movement is special
Value indicative acquisition unit 1, fetal movement eigenvalue comparing unit 2, low frequency suppressing filter exponent number increase unit 3 and low frequency suppressing filter
Exponent number reduces unit 4；Wherein, fetal movement eigenvalue acquisition unit 1 is within the setting time during monitoring fetal rhythm, to collection
To the envelope of fetal movement Doppler signal carry out computing or process, obtain representing the fetal movement eigenvalue of fetal movement situation；Fetal movement feature
Fetal movement eigenvalue that value comparing unit 2 obtains described in compare and the size of fetal movement threshold value preset are as big in fetal movement eigenvalue
In or equal to described fetal movement threshold value, it is judged that for being currently at the fetal movement phase, calling low frequency suppressing filter exponent number increases unit 3；No
Then, it is judged that for being in the non-fetal movement phase, call low frequency suppressing filter exponent number and reduce unit 4；Low frequency suppressing filter exponent number increases
Unit 3 is for increasing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap；Low frequency suppressing filter exponent number
Reduce unit 4 for reducing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap；Wherein, described fetal movement is special
Value indicative acquisition unit 1 is obtained ultrasonic echo signal by the ultrasound probe of monitor, takes out fetal movement Doppler signal therein
And eigenvalue, and it is transferred to described eigenvalue comparing unit 2；Described eigenvalue comparing unit 2 will export according to its comparative result
Control signal increases unit 3 to described low frequency suppressing filter exponent number or described low frequency suppressing filter exponent number reduces unit 4, this
The signal of two unit outputs makes the exponent number of this low frequency suppressing filter be increased or decreased.In the present embodiment, fetal movement feature
That value is the envelope value of fetal movement Doppler signal that collects and, the meansigma methods of described fetal movement Doppler signal envelope value, described
Any one in the quadratic sum of fetal movement Doppler signal envelope value or the integrated value of described fetal movement Doppler signal envelope value；
The value of described default fetal movement threshold value is suitable with the selection of described fetal movement eigenvalue.
In the present embodiment, described ultrasonic probe power increase unit 3 farther includes for judging that current ultrasonic is visited
The maximum judge module 31 launching driving voltage whether maximum of head；Described ultrasonic probe power reduction unit wraps further
Include 4 for the minima judge module 41 launching driving voltage whether minima judging that current ultrasonic pops one's head in.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the method promoting fetal rhythm Doppler signal acquisition quality during a fetal movement, it is characterised in that comprise the steps:
A), in the setting time during monitoring fetal rhythm, the envelope of the fetal movement Doppler signal collected is carried out computing or place
Reason, obtains representing the fetal movement eigenvalue of fetal movement situation；
B) compare described in the fetal movement eigenvalue that obtains and the size of fetal movement threshold value preset, if fetal movement eigenvalue is more than or equal to institute
State fetal movement threshold value, it is judged that for being currently at the fetal movement phase, perform step C)；Otherwise, it is judged that for being in the non-fetal movement phase, step is performed
D)；
C) increase the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return step A)；
D) reduce the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return step A).
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 1, it is characterised in that institute
State the envelope value that fetal movement eigenvalue is the fetal movement Doppler signal collected and, described fetal movement Doppler signal envelope value flat
In the integrated value of average, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler signal envelope value
Any one；The value of described default fetal movement threshold value is suitable with the selection of described fetal movement eigenvalue.
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 2, it is characterised in that sentence
Disconnected when currently whether being in the fetal movement phase, farther include: repeatedly obtain fetal movement eigenvalue, and repeatedly with default fetal movement threshold ratio
Relatively, be all higher than such as it or equal to as described in fetal movement threshold value, it is judged that for being currently at the fetal movement phase；Fetal movement threshold value as described in it is respectively less than,
Judge to be currently at the non-fetal movement phase.
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 3, it is characterised in that institute
The kind of the fetal movement threshold value stating fetal movement eigenvalue and the correspondence thereof repeatedly obtained is identical or differs.
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 1, it is characterised in that institute
State step C) farther include:
C1) judge the exponent number whether maximum of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, in this way, return
Return step A)；Otherwise, the suppression filtering of described fetal rhythm doppler audio filter circuit medium and low frequency is increased according to a step-length set
The exponent number of device, and return step A).
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 1, it is characterised in that institute
State step D) farther include following steps:
D1) judge the exponent number whether minima of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, in this way, return
Return step A)；Otherwise, the suppression filtering of described fetal rhythm doppler audio filter circuit medium and low frequency is reduced according to a step-length set
The exponent number of device, and return step A).
The method promoting fetal rhythm Doppler signal acquisition quality during fetal movement the most according to claim 1, it is characterised in that institute
State step A) farther include:
A1) launch ultrasonic signal, and obtain the echo-signal of the reflection of fetal rhythm and fetal body, be converted into the signal of telecommunication；
A2) the described signal of telecommunication is demodulated, obtains fetal rhythm Doppler signal and the mixed signal of fetal movement Doppler signal；
A3) the fetal rhythm Doppler signal in described mixed signal is filtered, obtains the envelope of fetal movement Doppler signal；To institute
State envelope and carry out computing or process, obtain fetal movement eigenvalue.
8. realize promoting during fetal movement as claimed in claim 1 a device for fetal rhythm Doppler signal acquisition quality method, its
It is characterised by, including:
Fetal movement eigenvalue acquisition unit: within the setting time during monitoring fetal rhythm, to the fetal movement Doppler collected
The envelope of signal carries out computing or process, obtains representing the fetal movement eigenvalue of fetal movement situation；
Fetal movement eigenvalue comparing unit: be used for fetal movement eigenvalue and the size of default fetal movement threshold value obtained described in comparing, as
Fetal movement eigenvalue is more than or equal to described fetal movement threshold value, it is judged that for being currently at the fetal movement phase, call low frequency suppressing filter exponent number
Increase unit；Otherwise, it is judged that for being in the non-fetal movement phase, call low frequency suppressing filter exponent number and reduce unit；
Low frequency suppressing filter exponent number increases unit: be used for increasing fetal rhythm doppler audio filter circuit medium and low frequency rejects trap
Exponent number；
Low frequency suppressing filter exponent number reduces unit: be used for reducing fetal rhythm doppler audio filter circuit medium and low frequency rejects trap
Exponent number；
Wherein, described fetal movement eigenvalue acquisition unit is obtained ultrasonic echo signal by the ultrasound probe of monitor, takes out it
In fetal movement Doppler signal and eigenvalue, and be transferred to described eigenvalue comparing unit；Described eigenvalue comparing unit will depend on
Output a control signal to described low frequency suppressing filter exponent number according to its comparative result and increase unit or described low frequency suppressing filter
Exponent number reduces unit.
Device the most according to claim 8, it is characterised in that described fetal movement eigenvalue is the fetal movement Doppler letter collected
Number envelope value and, the meansigma methods of described fetal movement Doppler signal envelope value, described fetal movement Doppler signal envelope value flat
Side and or the integrated value of described fetal movement Doppler signal envelope value in any one；The value of described default fetal movement threshold value
Selection with described fetal movement eigenvalue is suitable.
Device the most according to claim 8, it is characterised in that described low frequency suppressing filter exponent number increases unit and enters one
Step includes: for judging the maximum judge module of low frequency suppressing filter exponent number that current ultrasonic pops one's head in whether maximum；
Described low frequency suppressing filter exponent number reduces unit and farther includes: be used for judging that current low frequency suppressing filter exponent number is
The minima judge module of little value.
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| CN105105740B (en) * | 2015-09-06 | 2018-12-04 | 深圳市理邦精密仪器股份有限公司 | Fetus monitoring method and device |
| US9748929B1 (en) * | 2016-10-24 | 2017-08-29 | Analog Devices, Inc. | Envelope-dependent order-varying filter control |
| BR112020003490A2 (en) * | 2017-08-23 | 2020-08-25 | Koninklijke Philips N.V. | fetal movement detection method, fetal movement detection device and non-transitory computer-readable media |
| CN107468281B (en) * | 2017-08-30 | 2019-11-15 | 吉林大学 | Monitor the device and terminal device of fetal state |
| TWI669522B (en) * | 2018-06-28 | 2019-08-21 | 立積電子股份有限公司 | Doppler signal processing device and signal processing method |
| CN109589137B (en) * | 2018-11-02 | 2021-10-22 | 深圳市理邦精密仪器股份有限公司 | Fetal movement identification method, fetal movement identification device, terminal and computer-readable storage medium |
Family Cites Families (8)
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| US7374539B2 (en) * | 2003-09-02 | 2008-05-20 | University Of Utah Research Foundation | Method and apparatus for predicting material hypertension during pregnancy using coherence analysis of material and fetal blood velocity waveforms |
| CN102090883B (en) * | 2010-12-30 | 2012-11-07 | 深圳市理邦精密仪器股份有限公司 | Automatic identification method and device for fetal movement |
| US9597055B2 (en) * | 2011-01-07 | 2017-03-21 | General Electric Company | Fetal scalp doppler device and system |
| CN102210586A (en) * | 2011-06-03 | 2011-10-12 | 泰安市迈迪医疗电子有限公司 | Automatic analysis method for fetus monitoring device |
| US20130096440A1 (en) * | 2011-10-14 | 2013-04-18 | Marianna Kiraly | Portable fetal eeg-recording device and method of use |
| CN103190913B (en) * | 2013-04-15 | 2015-03-11 | 深圳邦健生物医疗设备股份有限公司 | Fetal movement recognition method, fetal movement recognition equipment and fetal monitor |
| CN103393435B (en) * | 2013-07-31 | 2015-01-07 | 深圳市理邦精密仪器股份有限公司 | Method and device for acquiring fetal heart sound signal envelope |
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