CN104586434A - Method and device for improving fetal heart Doppler signal acquisition quality during fetal movement - Google Patents
Method and device for improving fetal heart Doppler signal acquisition quality during fetal movement Download PDFInfo
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Abstract
The invention relates to a method for improving fetal heart Doppler signal acquisition quality during fetal movement. The method comprises the following steps: in set time of a fetal heart monitoring process, performing calculation or processing on envelopes of acquired fetal movement Doppler signals, so as to obtain fetal movement characteristic values which represent the fetal movement condition; comparing the obtained fetal movement characteristic values with the size of preset fetal movement thresholds; if the fetal movement characteristic values are greater than or equal to the fetal movement thresholds, determining that a fetus is in a fetal movement period, and increasing the order of a low-frequency suppression filter in a fetal heart Doppler audio-frequency filter circuit; otherwise, determining that the fetus is in a non-fetal movement period, and reducing the order of the filter. The invention also relates to a device for realizing the method. The method and the device for improving the fetal heart Doppler signal acquisition quality during fetal movement have the following beneficial effects of eliminating the interference of the fetal movement signals on fetal heart Doppler signals to a certain extent and being relatively easy in subsequent processing.
Description
Technical field
The present invention relates to the signal processing field of Medical Instruments, more particularly, when relating to a kind of fetal movement, promote method and the device of fetal rhythm Doppler signal acquisition quality.
Background technology
Ultrasonic Doppler fetal monitor is by launching ultrasonic signal, then receiving the ultrasound echo signal from heart of fetus, judges the state that fetus is current.Because heart of fetus is ceaselessly being beaten, utilize principle of Doppler, echo-signal has certain frequency shift (FS), and ultrasonic Doppler fetal monitor, by utilizing echo demodulation amplifying circuit, parses this frequency offseting value from ultrasound wave.Because this value is corresponding with fetus heart beating, so utilize this frequency offset signal just can be obtained the heart rate value of fetus by further process.But in the process of monitoring fetal rhythm, fetus situation movable in pregnant woman uterus often occurs, and this situation is commonly referred to fetal movement.During fetal movement, fetal heart rate signal even may be flooded by the Doppler signal of fetal movement (frequency is lower than fetal rhythm Doppler signal) interference, and the fetal rhythm Doppler signal obtained will be deteriorated.This factor makes the fetal heart sound Doppler signal that collects can be much little 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 can not take appropriate measures for this situation usually, because the interference of fetal movement Doppler signal causes can not get good fetal rhythm Doppler signal when this situation makes fetal movement, and then cause calculating fetal heart frequency curve, the effect of fetal monitoring and efficiency are all affected.Fetal rhythm doppler audio signal filter circuit suppresses with maximum low frequency always, although class can alleviate the problems referred to above to a certain extent, but when not having fetal movement, fetal heart rate signal itself more weak, then may obtain because low-frequency filter exponent number too much causes useful fetal rhythm Doppler signal decay excessive, be unfavorable for follow-up process.So in general, the method for existing fetal rhythm Doppler signal collection has and is easily subject to fetal movement Doppler signal interference that fetal movement brings, makes subsequent treatment become the shortcoming of comparatively difficulty.
Summary of the invention
The technical problem to be solved in the present invention is, easily be subject to fetal movement Doppler signal interference that fetal movement brings for prior art above-mentioned, make subsequent treatment become the defect of comparatively difficulty, provide a kind of interference, subsequent treatment eliminating Fetal Movement Signal to a certain extent when being comparatively easy to fetal movement, to promote method and the device of fetal rhythm Doppler signal acquisition quality.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method promoting fetal rhythm Doppler signal acquisition quality when constructing fetal movement, comprises the steps:
A) in the setting-up time in monitoring fetal rhythm process, computing or process are carried out to the envelope of the fetal movement Doppler signal collected, obtain the fetal movement eigenvalue representing fetal movement situation;
B) relatively described in the fetal movement eigenvalue that obtains and the size of fetal movement threshold value preset, as fetal movement eigenvalue be more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase, perform step C); Otherwise, be judged as being in the non-fetal movement phase, perform step D);
C) increase the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return steps A);
D) reduce the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return steps A).
Further, described fetal movement eigenvalue be the envelope value of the fetal movement Doppler signal collected and, any one in the integrated value of the meansigma methods of described fetal movement Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler signal envelope value; The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue suitable.
Further, judge current when whether being in the fetal movement phase, comprise further: repeatedly obtain fetal movement eigenvalue, and repeatedly compare with the fetal movement threshold value preset, as its be all more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase; As its be all less than as described in fetal movement threshold value, judge currently to be in the non-fetal movement phase.
Further, the kind of the fetal movement threshold value of the described fetal movement eigenvalue that repeatedly obtains and correspondence thereof is identical or not identical.
Further, described step C) comprise further:
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 steps A); Otherwise, increase the exponent number of described fetal rhythm doppler audio filter circuit medium and low frequency rejects trap according to the step-length of a setting, and return steps A).
Further, described step D) in comprise the steps: further
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 steps A); Otherwise, reduce the exponent number of described fetal rhythm doppler audio filter circuit medium and low frequency rejects trap according to the step-length of a setting, and return steps A).
The invention still further relates to a kind of device realizing said method, comprising:
Fetal movement eigenvalue acquisition unit: in the setting-up time in monitoring fetal rhythm process, computing or process are carried out to the envelope of the fetal movement Doppler signal collected, obtain the fetal movement eigenvalue representing fetal movement situation;
Fetal movement eigenvalue comparing unit: for the size of the fetal movement eigenvalue obtained described in relatively and the fetal movement threshold value of presetting, as fetal movement eigenvalue be more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase, calling low frequency suppressing filter exponent number increases unit; Otherwise, be judged as 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: for increasing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap;
Low frequency suppressing filter exponent number reduces unit: for reducing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap;
Wherein, described fetal movement eigenvalue acquisition unit obtains ultrasonic echo signal by the ultrasound probe of monitor, takes out fetal movement Doppler signal wherein and eigenvalue, and is transferred to described eigenvalue comparing unit; Described eigenvalue comparing unit will output a control signal to described low frequency suppressing filter exponent number according to its comparative result increases unit or described low frequency suppressing filter exponent number reduction unit.
Further, described fetal movement eigenvalue be the envelope value of the fetal movement Doppler signal collected and, any one in the integrated value of the meansigma methods of described fetal movement Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler 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 increases unit and comprises further: for judging the maximum judge module of transmitting driving voltage that current ultrasonic pops one's head in whether maximum; Described ultrasonic probe power reduction unit comprises further: for judging the minima judge module of transmitting driving voltage that current ultrasonic pops one's head in whether minima.
Method and the device of fetal rhythm Doppler signal acquisition quality is promoted when implementing fetal movement of the present invention, there is following beneficial effect: owing to having taken out fetal movement Doppler signal in the mixed signal from fetal rhythm Doppler signal and fetal movement Doppler signal, and through process, fetal movement eigenvalue is obtained to it, it is compared with the fetal movement threshold value set, just more adequately can judge whether fetus is in fetal movement state; According to current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap state, its exponent number is adjusted again, make this monitor can obtain fetal heart rate signal comparatively accurately as much as possible when fetal movement; The fetus be in during non-fetal movement is reduced to the exponent number of this wave filter simultaneously, make it accurately to be taken out under more weak fetal heart rate signal, facilitate subsequent treatment.Therefore, its to eliminate Fetal Movement Signal to a certain extent comparatively easy to the interference of fetal rhythm Doppler signal, subsequent treatment.
Accompanying drawing explanation
The flow chart of the method in the method for fetal rhythm Doppler signal acquisition quality and device embodiment is promoted when Fig. 1 is fetal movement of the present invention;
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 shown in Figure 1, in the method promoting fetal rhythm Doppler signal acquisition quality when fetal movement of the present invention and device embodiment, the method comprises the steps:
Step S11 process ultrasonic reflections signal, obtain fetal movement Doppler signal, to its process, obtain fetal movement eigenvalue: in the present embodiment, first start the monitoring to fetus, fetal ultrasound Doppler monitor is namely used to guard fetus, start to launch ultrasound wave to fetus, beat due to heart of fetus and the frequency of ultrasonic echo signal is offset, receiving 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 is actually a mixed signal, the fetal heart rate signal that namely in this signal, existing expression heart of fetus is beated, and also has the Fetal Movement Signal representing fetus movement in uterus.In like manner, when fetus is not moved, represent in ultrasonic echo signal that the component of signal (frequency shift (FS)) of fetal movement is smaller, and represent that the component of fetal heart rate signal is larger; And when fetal movement, the component of above-mentioned Fetal Movement Signal is just larger, and represent that the component of fetal heart rate signal is smaller.On basic, when heart of fetus moves or fetal body moves, cause the frequency of echo-signal to offset, thus obtain different ultrasonic frequency shifted signals.In echo-signal, above-mentioned two Doppler frequency signals (or component of signal) mix.In this step, by the component of two in above-mentioned mixed signal separately, the Doppler signal (or Doppler frequency deviation signal) caused by fetal movement is namely obtained.Computing is carried out for the above-mentioned fetal movement Doppler signal gathering a period of time, just obtains the fetal movement eigenvalue representing current fetal movement state.In the present embodiment, fetal movement eigenvalue carries out computing to the envelope that above-mentioned a period of time collects Fetal Movement Signal.In the present embodiment, this eigenvalue can be the envelope value of fetal movement Doppler signal in the time period and, in the time period envelope value of fetal movement Doppler signal meansigma methods, in the time period envelope value of fetal movement Doppler signal quadratic sum or in the time period envelope value of fetal movement Doppler signal integrated value in any one.If the envelope of fetal movement Doppler signal is I
i, then within the time period that N number of unit of time forms,
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
Namely when select fetal movement eigenvalue be above-mentioned any one time, the computing that the expression formula of just carrying out its correspondence above-mentioned to the envelope of fetal movement Doppler signal 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 of setting, in this way, judges that fetus is current and is in fetal movement state, performs step S13; Otherwise, judge that fetus is current and be in non-fetal movement state, perform step S14; In the present embodiment, fetal movement threshold value is a setting in advance and the value corresponding with the fetal movement eigenvalue kind selected.Even because in the identical situation of the envelope of fetal movement Doppler signal, 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, when identical envelope, select fetal movement eigenvalue be the envelope value of fetal movement Doppler signal and when, when being the meansigma methods of the envelope value of fetal movement Doppler signal in the time period with selection fetal movement eigenvalue, the fetal movement eigenvalue obtained is different, therefore, the fetal movement threshold value under both of these case is also just different.When judging that current fetus is in fetal movement, perform step S13; When judging that fetus is in non-fetal movement, perform step S14.It is worth mentioning that, under certain situation in the present embodiment, above-mentioned judgement fetal state can be compare with the fetal movement threshold value of setting after obtaining a fetal movement eigenvalue, obtains the state of current fetus; And in yet some other cases, also can be within multiple time period, obtain repeatedly fetal movement eigenvalue, compare with the fetal movement threshold value of setting respectively, when the result repeatedly compared is consistent, just draw the judgement of above-mentioned fetal state.Above-mentioned repeatedly obtain fetal movement eigenvalue and compare with setting fetal movement threshold value time, the kind that its fetal movement eigenvalue is selected can be one species, also can be different kinds, now, also will there is corresponding change in the fetal movement threshold value at every turn compared, suitable with the kind of the fetal movement eigenvalue of its selection.
Step S13 increases the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap: in this step, owing to judging to be in fetal movement state by the fetus of guarding is current, therefore carry in the above-mentioned echo-signal by ultrasound probe obtains and move due to fetus in a large number and the fetal movement Doppler signal component that produces, speed due to fetus movement is slower than the speed of fetal heartbeat usually, and it is comparatively mild, irregular, so its Doppler signal concentrates on the part (for fetal rhythm Doppler signal) of comparatively low frequency usually, so the exponent number of low frequency suppressing filter when needing increasing to obtain fetal rhythm doppler audio signal (this low frequency suppressing filter is the adjustable multistage low-frequency filter of an exponent number), strengthen the effect that this wave filter suppresses low frequency, to obtain comparatively clearly fetal heart rate signal.As for the concrete steps strengthening driving voltage, describe in detail after a while.After executing this step, return step S11, start the monitoring of next round and fetal rhythm, the obtaining of Fetal Movement Signal.
Step S14 reduces the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap: in this step, owing to judging to be in non-fetal movement state by the fetus of guarding is current, so due to fetus, to move the fetal movement Doppler component caused less in above-mentioned echo-signal, even if reduce the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, also comparatively clearly fetal heart rate signal can be obtained.As for the concrete steps reducing driving voltage, describe in detail after a while.After executing this step, return step S11, start the monitoring of next round and fetal rhythm, the obtaining of Fetal Movement Signal.
As shown in Figure 2, in the present embodiment, more specifically, its step obtaining fetal movement eigenvalue comprises:
Step S21 obtains the ultrasonic echo of reflection, and be converted into the signal of telecommunication: in this step, the ultrasound probe of monitor is arranged on by the abdominal part relevant position of monitoring anemia of pregnant woman, the ultrasonic signal making it launch is irradiated to fetus, and produce echo, this echo makes its frequency that certain deviation occur due to the heart beating of fetus or moving of fetal body, after ultrasound probe receives above-mentioned echo, is converted into the signal of telecommunication.
Step S22 carries out demodulation to this signal of telecommunication, obtain the mixed signal of fetal rhythm Doppler signal and fetal movement Doppler signal: in this step, demodulation is carried out to the signal of telecommunication obtained above, namely remove ultrasound wave carrier frequency wherein, obtain comprising fetal rhythm Doppler signal and the mixed signal of fetal movement Doppler signal.
Step S23 carries out filtering to mixed signal, obtains the envelope of fetal movement Doppler signal: carried out decaying and filtering by the fetal rhythm Doppler signal in mixed signal, obtain fetal movement Doppler signal, for carrying out the eigenvalue calculation of fetal movement.It is worth mentioning that, also will separate after a road carries out low frequency filtering to above-mentioned mixed signal, and obtain fetal rhythm Doppler signal.
Above-mentioned setting or selected computing are carried out to the envelope of above-mentioned fetal movement Doppler signal, obtains fetal movement eigenvalue
As shown in Figure 3, in the present embodiment, the step increasing the transmitting driving voltage of ultrasound probe comprises:
Step S31 obtains the exponent number of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, judge whether it is maximum: in this step, obtain the exponent number of current fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, judge this value whether this wave filter allow the maximum of exponent number, in this way, then represent and can not regulate this exponent number again, jump to step S33; Exponent number value as current is not the maximum allowed, then represent and can regulate the exponent number of this low frequency suppressing filter, perform step S32.
Step S32 increases the exponent number of this wave filter according to the step-length of setting: in this step, in this step, the exponent number of above-mentioned low frequency suppressing filter is regulated, make it increase, the increase of this filter order can make its suppression for low frequency signal better, namely better to the suppression of fetal movement Doppler signal, the fetal rhythm Doppler signal of better quality can be obtained.In the present embodiment, set an amplitude (or step-length) regulated in advance, it is all the amplitude of increase by setting during each adjustment, this exponent number can be increased gradually in repeatedly adjustment process, avoid the excessive adverse effect to extraction fetal rhythm doppler audio signal brought of the amplitude of accommodation, such as, the larger amplitude of accommodation may make to become comparatively difficulty to obtaining of fetal rhythm Doppler signal.Such as, if this exponent number maximum is 5, amplitude or the step-length of each adjustment are 1, when current exponent number is 3, regulate once this filter order afterwards to become 4.After executing this step, return step S11.
Step S33 does not adjust the exponent number value of low frequency suppressing filter: in this step, does not regulate the exponent number of above-mentioned low frequency suppressing filter, after executing this step, will return step S11.
It is worth mentioning that, when judging that fetus is in non-fetal movement state, also can regulate the exponent number of above-mentioned low frequency suppressing filter, making it reduce.Concrete step also can above-mentioned steps similar, difference is, first judges the exponent number of current low frequency suppressing filter, judges whether it is minimum exponent number, in this way, directly returns step S11, not adjusted; As no, then similar to above-mentioned steps S32, each exponent number reducing a setting step-length.
In addition, the present embodiment also relates to a kind of device realizing said method.As shown in Figure 4, this device comprises fetal movement eigenvalue acquisition unit 1, fetal movement eigenvalue comparing unit 2, low frequency suppressing filter exponent number increases unit 3 and low frequency suppressing filter exponent number reduces unit 4; Wherein, fetal movement eigenvalue acquisition unit 1, in the setting-up time in monitoring fetal rhythm process, carries out computing or process to the envelope of the fetal movement Doppler signal collected, and obtains the fetal movement eigenvalue representing fetal movement situation; Fetal movement eigenvalue comparing unit 2 for the size of the fetal movement eigenvalue obtained described in relatively and the fetal movement threshold value of presetting, as fetal movement eigenvalue be more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase, calling low frequency suppressing filter exponent number increases unit 3; Otherwise, be judged as 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 the exponent number of unit 3 for increasing fetal rhythm doppler audio filter circuit medium and low frequency rejects trap; Low frequency suppressing filter exponent number reduces unit 4 for reducing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap; Wherein, described fetal movement eigenvalue acquisition unit 1 obtains ultrasonic echo signal by the ultrasound probe of monitor, takes out fetal movement Doppler signal wherein and eigenvalue, and is transferred to described eigenvalue comparing unit 2; Described eigenvalue comparing unit 2 will output a control signal to described low frequency suppressing filter exponent number according to its comparative result increases unit 3 or described low frequency suppressing filter exponent number reduction unit 4, and the signal that these two unit export makes the exponent number of this low frequency suppressing filter increase or reduce.In the present embodiment, fetal movement eigenvalue be the envelope value of the fetal movement Doppler signal collected and, any one in the integrated value of the meansigma methods of described fetal movement Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler signal envelope value; The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue suitable.
In the present embodiment, described ultrasonic probe power increases unit 3 and comprises maximum judge module 31 for judging transmitting driving voltage that current ultrasonic pops one's head in whether maximum further; Described ultrasonic probe power reduction unit comprises 4 further for judging the minima judge module 41 of transmitting driving voltage that current ultrasonic pops one's head in whether minima.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. promote a method for fetal rhythm Doppler signal acquisition quality during fetal movement, it is characterized in that, comprise the steps:
A) in the setting-up time in monitoring fetal rhythm process, computing or process are carried out to the envelope of the fetal movement Doppler signal collected, obtain the fetal movement eigenvalue representing fetal movement situation;
B) relatively described in the fetal movement eigenvalue that obtains and the size of fetal movement threshold value preset, as fetal movement eigenvalue be more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase, perform step C); Otherwise, be judged as being in the non-fetal movement phase, perform step D);
C) increase the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return steps A);
D) reduce the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap, and return steps A).
2. during fetal movement according to claim 1, promote the method for fetal rhythm Doppler signal acquisition quality, it is characterized in that, described fetal movement eigenvalue be the envelope value of the fetal movement Doppler signal collected and, any one in the integrated value of the meansigma methods of described fetal movement Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler signal envelope value; The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue suitable.
3. during fetal movement according to claim 2, promote the method for fetal rhythm Doppler signal acquisition quality, it is characterized in that, judge current when whether being in the fetal movement phase, comprise further: repeatedly obtain fetal movement eigenvalue, and repeatedly compare with the fetal movement threshold value preset, as its be all more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase; As its be all less than as described in fetal movement threshold value, judge currently to be in the non-fetal movement phase.
4. promote the method for fetal rhythm Doppler signal acquisition quality during fetal movement according to claim 3, it is characterized in that, the kind of the fetal movement threshold value of the described fetal movement eigenvalue that repeatedly obtains and correspondence thereof is identical or not identical.
5. promote the method for fetal rhythm Doppler signal acquisition quality during fetal movement according to claim 1, it is characterized in that, described step C) comprise further:
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 steps A); Otherwise, increase the exponent number of described fetal rhythm doppler audio filter circuit medium and low frequency rejects trap according to the step-length of a setting, and return steps A).
6. promote the method for fetal rhythm Doppler signal acquisition quality during fetal movement according to claim 1, it is characterized in that, described step D) in comprise the steps: further
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 steps A); Otherwise, reduce the exponent number of described fetal rhythm doppler audio filter circuit medium and low frequency rejects trap according to the step-length of a setting, and return steps A).
7. promote the method for fetal rhythm Doppler signal acquisition quality during fetal movement according to claim 1, it is characterized in that, described steps A) comprise further:
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) demodulation is carried out to the described signal of telecommunication, obtain the mixed signal of fetal rhythm Doppler signal and fetal movement Doppler signal;
A3) filtering is carried out to the fetal rhythm Doppler signal in described mixed signal, obtain the envelope of fetal movement Doppler signal; Computing or process are carried out to described envelope, obtains fetal movement eigenvalue.
8. promote a device for fetal rhythm Doppler signal acquisition quality method when realizing fetal movement as claimed in claim 1, it is characterized in that, comprising:
Fetal movement eigenvalue acquisition unit: in the setting-up time in monitoring fetal rhythm process, computing or process are carried out to the envelope of the fetal movement Doppler signal collected, obtain the fetal movement eigenvalue representing fetal movement situation;
Fetal movement eigenvalue comparing unit: for the size of the fetal movement eigenvalue obtained described in relatively and the fetal movement threshold value of presetting, as fetal movement eigenvalue be more than or equal to as described in fetal movement threshold value, be judged as currently being in the fetal movement phase, calling low frequency suppressing filter exponent number increases unit; Otherwise, be judged as 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: for increasing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap;
Low frequency suppressing filter exponent number reduces unit: for reducing the exponent number of fetal rhythm doppler audio filter circuit medium and low frequency rejects trap;
Wherein, described fetal movement eigenvalue acquisition unit obtains ultrasonic echo signal by the ultrasound probe of monitor, takes out fetal movement Doppler signal wherein and eigenvalue, and is transferred to described eigenvalue comparing unit; Described eigenvalue comparing unit will output a control signal to described low frequency suppressing filter exponent number according to its comparative result increases unit or described low frequency suppressing filter exponent number reduction unit.
9. device according to claim 8, it is characterized in that, described fetal movement eigenvalue be the envelope value of the fetal movement Doppler signal collected and, any one in the integrated value of the meansigma methods of described fetal movement Doppler signal envelope value, the quadratic sum of described fetal movement Doppler signal envelope value or described fetal movement Doppler signal envelope value; The value of described default fetal movement threshold value and the selection of described fetal movement eigenvalue suitable.
10. device according to claim 8, is characterized in that, described low frequency suppressing filter exponent number increases unit and comprises further: 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 comprises further: for judging the minima judge module of current low frequency suppressing filter exponent number whether minima.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105105740A (en) * | 2015-09-06 | 2015-12-02 | 深圳市理邦精密仪器股份有限公司 | Fetus monitoring method and apparatus |
| CN107468281A (en) * | 2017-08-30 | 2017-12-15 | 宋文龄 | Monitor the device and terminal device of fetal state |
| CN107979376A (en) * | 2016-10-24 | 2018-05-01 | 美国亚德诺半导体公司 | The FILTER TO CONTROL of envelope-dependence order change |
| CN109589137A (en) * | 2018-11-02 | 2019-04-09 | 深圳市理邦精密仪器股份有限公司 | Method, apparatus, terminal and the computer readable storage medium of movement of the foetus identification |
| 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 |
| CN111050659A (en) * | 2017-08-23 | 2020-04-21 | 皇家飞利浦有限公司 | Fetal movement detection method based on Doppler ultrasonic signals |
| CN113679354A (en) * | 2021-09-02 | 2021-11-23 | 上海贝瑞电子科技有限公司 | Fetal movement signal detection device and method and storage medium |
| CN118058752A (en) * | 2024-04-17 | 2024-05-24 | 遂宁市中心医院 | Automatic monitoring method and device for parturient to be produced, storage medium and terminal equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050065439A1 (en) * | 2003-09-02 | 2005-03-24 | University Of Utah | Method and apparatus for predicting material hypertension during pregnancy using coherence analysis of material and fetal blood velocity waveforms |
| CN102090883A (en) * | 2010-12-30 | 2011-06-15 | 深圳市理邦精密仪器股份有限公司 | Automatic identification method and device for fetal movement |
| 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 |
| US20120179045A1 (en) * | 2011-01-07 | 2012-07-12 | General Electrical Company | Fetal Scalp Doppler Device and System |
| CN103190913A (en) * | 2013-04-15 | 2013-07-10 | 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 |
| WO2013121237A1 (en) * | 2012-02-14 | 2013-08-22 | Kiraly Marianna | Portable fetal eeg-recording device and method of use |
| CN103393435A (en) * | 2013-07-31 | 2013-11-20 | 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 |
| CN105078435A (en) * | 2014-04-24 | 2015-11-25 | 重庆融海超声医学工程研究中心有限公司 | Fetal heart sound signal detection and processing device |
-
2015
- 2015-01-16 CN CN201510023198.XA patent/CN104586434B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050065439A1 (en) * | 2003-09-02 | 2005-03-24 | University Of Utah | Method and apparatus for predicting material hypertension during pregnancy using coherence analysis of material and fetal blood velocity waveforms |
| CN102090883A (en) * | 2010-12-30 | 2011-06-15 | 深圳市理邦精密仪器股份有限公司 | Automatic identification method and device for fetal movement |
| US20120179045A1 (en) * | 2011-01-07 | 2012-07-12 | General Electrical 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 |
| WO2013121237A1 (en) * | 2012-02-14 | 2013-08-22 | Kiraly Marianna | Portable fetal eeg-recording device and method of use |
| CN103190913A (en) * | 2013-04-15 | 2013-07-10 | 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 |
| CN103393435A (en) * | 2013-07-31 | 2013-11-20 | 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 |
| CN105078435A (en) * | 2014-04-24 | 2015-11-25 | 重庆融海超声医学工程研究中心有限公司 | Fetal heart sound signal detection and processing device |
Cited By (14)
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|---|---|---|---|---|
| CN105105740A (en) * | 2015-09-06 | 2015-12-02 | 深圳市理邦精密仪器股份有限公司 | Fetus monitoring method and apparatus |
| 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 |
| CN107979376A (en) * | 2016-10-24 | 2018-05-01 | 美国亚德诺半导体公司 | The FILTER TO CONTROL of envelope-dependence order change |
| CN111050659A (en) * | 2017-08-23 | 2020-04-21 | 皇家飞利浦有限公司 | Fetal movement detection method based on Doppler ultrasonic signals |
| CN107468281B (en) * | 2017-08-30 | 2019-11-15 | 吉林大学 | Monitor the device and terminal device of fetal state |
| CN107468281A (en) * | 2017-08-30 | 2017-12-15 | 宋文龄 | 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 |
| EP3588126A1 (en) * | 2018-06-28 | 2020-01-01 | Richwave Technology Corp. | Doppler signal processing device and method thereof for interference spectrum tracking and suppression |
| US11520031B2 (en) | 2018-06-28 | 2022-12-06 | Richwave Technology Corp. | Doppler signal processing device and method thereof for interference spectrum tracking and suppression |
| CN109589137A (en) * | 2018-11-02 | 2019-04-09 | 深圳市理邦精密仪器股份有限公司 | Method, apparatus, terminal and the computer readable storage medium of movement of the foetus identification |
| 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 |
| CN113679354A (en) * | 2021-09-02 | 2021-11-23 | 上海贝瑞电子科技有限公司 | Fetal movement signal detection device and method and storage medium |
| CN118058752A (en) * | 2024-04-17 | 2024-05-24 | 遂宁市中心医院 | Automatic monitoring method and device for parturient to be produced, storage medium and terminal equipment |
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