CN103222863A - Array fetal heart monitoring abdominal bandage based on piezoelectric film sensor - Google Patents

Array fetal heart monitoring abdominal bandage based on piezoelectric film sensor Download PDF

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CN103222863A
CN103222863A CN2013101913351A CN201310191335A CN103222863A CN 103222863 A CN103222863 A CN 103222863A CN 2013101913351 A CN2013101913351 A CN 2013101913351A CN 201310191335 A CN201310191335 A CN 201310191335A CN 103222863 A CN103222863 A CN 103222863A
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piezoelectric film
film sensor
bellyband
signal
fetus
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CN103222863B (en
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樊家良
杨强
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention provides an array fetal heart monitoring abdominal bandage based on a piezoelectric film sensor and relates to the field of monitoring on the heart of a fetus. The invention is used for solving the problems of serious error, 'invasion type' monitoring manner and low accuracy caused in the fact that a fetal heart sound stethoscope, an ultrasonic Doppler fetal heart sound instrument and a single sensor are used for fetal heart monitoring in the prior art. Magic pastes are respectively arranged at the two end parts of the abdominal bandage, and a piezoelectric film sensor array is arranged at the middle part of the abdominal bandage; a detection circuit is arranged on the abdominal bandage; and the detection circuit is composed of a preposed differential amplifying circuit, a filter circuit, an analog/digital conversion circuit, a DSP (digital signal processing) module, a storage module and an interface module. The adopted piezoelectric film sensor has the advantages of high response speed, high flexibility and good linearity, and high detection accuracy can be guaranteed; and the piezoelectric film sensor is light, soft and durable, so that the piezoelectric film sensor can be in fit with a human body well after being embedded into the abdominal bandage and a man-machine effect is good.

Description

A kind of array fetal rhythm monitoring bellyband based on piezoelectric film sensor
Technical field
The present invention relates to monitoring field to heart of fetus.
Background technology
Fetal heart monitoring only was used to infer in the past whether fetus survives, now then by the fetal rhythm monitoring, and can diagnosing fetal energy reserve ability and foetus health situation.Fetal rhythm monitoring not only can the diagnosing fetal cardiac function, can also the diagnosing fetal central nervous system function, and avoid the ecological deterioration of gravid woman uterus that the fetus nervus centralis is caused irremediable damage.The fetal rhythm rate is an important indicator of fetal rhythm monitoring.
The monitoring of early stage fetal rhythm mostly is to utilize the fetal heart sound stethoscope to measure the fetal rhythm rate, exist error greatly, poor anti jamming capability, need the manually operated shortcoming of doctor or gravid woman.Be extensive use of the ultrasonic doppler fetal gage at present as the fetal rhythm monitoring means in hospital, this method cardinal principle is initiatively to send ultrasound wave by instrument to act on fetus, from the various tissues of fetus hyperacoustic different reflected signals is obtained fetal rhythm information.Obviously, this is the monitoring method of a kind of " invasion formula ".Adopt this method that fetus is continued to monitor safety the unknown, have potential hazard parent and fetus.Adopt the fetal rhythm monitoring equipment precision of single-sensor lower, measurement result is subjected to maternal influence bigger, and can not make estimation to the heart of fetus position.
Summary of the invention
The purpose of this invention is to provide a kind of array fetal rhythm monitoring bellyband based on piezoelectric film sensor, mostly be to utilize fetal heart sound stethoscope, ultrasonic doppler fetal gage, single-sensor to carry out the fetal rhythm monitoring in order to solve existing fetal rhythm monitoring, they exist error greatly or belong to the monitoring or the low problem of precision of " invasion formula ".
Described purpose realizes by following scheme: described a kind of array fetal rhythm monitoring bellyband based on piezoelectric film sensor, form by bellyband, a plurality of piezoelectric film sensor, testing circuit;
Be respectively arranged with VELCRO on the both ends of bellyband, the piezoelectric film sensor array is arranged on the middle part of bellyband; Testing circuit is arranged on the bellyband; Affiliated testing circuit is made up of preposition differential amplifier circuit, filter circuit, mould/number conversion circuit, DSP module, memory module, interface module; The signal output bus of piezoelectric film sensor array connects the signal input bus of preposition differential amplifier circuit, the signal output bus of preposition differential amplifier circuit connects the signal input bus of filter circuit, the signal input bus of the signal output bus connection mode/number conversion circuit of filter circuit, the data-out bus of mould/number conversion circuit connects the data input bus (DIB) of DSP module, the data storage output input bus end of the data storage output input bus end connected storage module of DSP module, the data-out bus end of DSP module is connected with the data-out bus end of interface module; Described DSP module to fetus can quantity algorithm be: the first step, and utilize the Teager energy operator to give prominence to the high-energy zone (for example heart beating of fetus) of signal, following formula is adopted in the calculating of Teager energy operator:
Figure 2013101913351100002DEST_PATH_IMAGE002
Wherein:
Figure 2013101913351100002DEST_PATH_IMAGE004
Be the fetal heartbeat signal that receives,
Figure 2013101913351100002DEST_PATH_IMAGE006
Be the Teager energy signal; In second step, the Teager energy signal is realized fetal heart frequency according to a preliminary estimate through auto-correlation processing; In the 3rd step, the signal that obtains after the auto-correlation processing obtains pairing frequency of peak point and energy after estimating to handle through peak value; In the 4th step, the energy signal that arrives that peak value is estimated obtains the pairing frequency of ceiling capacity, with the heart rate of this frequency as fetus through the energy comparison process; Described DSP module to the algorithm of heart of fetus position is: on same plane, suppose that the coordinate position of heart of fetus position and described piezoelectric film sensor is respectively
Figure 2013101913351100002DEST_PATH_IMAGE008
With
Figure 2013101913351100002DEST_PATH_IMAGE010
, wherein
Figure 2013101913351100002DEST_PATH_IMAGE012
,
Figure 2013101913351100002DEST_PATH_IMAGE014
For sound source to the
Figure 2013101913351100002DEST_PATH_IMAGE016
Range difference between the individual described piezoelectric film sensor can be expressed as with equation:
In the formula,
Figure 2013101913351100002DEST_PATH_IMAGE020
Be acoustic propagation velocity,
Figure 2013101913351100002DEST_PATH_IMAGE022
For sound-source signal to the
Figure 206036DEST_PATH_IMAGE016
Individual described piezoelectric film sensor with to described piezoelectric film sensor
Figure 2013101913351100002DEST_PATH_IMAGE024
Time delay value.By hyp definition as can be known, every pair of time delay can be determined a hyperbola, and then two pairs of time delays can be determined two hyperbolies, and these two hyp position of intersecting point are cardiac position.
Piezoelectric film sensor of the present invention has the advantage that response speed is fast, highly sensitive and the linearity is good, can guarantee the accuracy that detects; Because the piezoelectric film sensor quality is little, softness is durable, and it can be good at fitting with human body after embedding bellyband, and man-machine effect is good.
The present invention only needs to twine a described bellyband at gravid woman's abdominal part, just can monitor in real time gravid woman's fetal rhythm rate, simultaneously fetus cardiac position in gravid woman's body is made estimation, can satisfy the needs of anemia of pregnant woman's self-monitoring at home, and the Monitoring Data of storage also can guarantee the health of gravid woman and fetus for the doctor provides reference.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention;
Fig. 2 is the structural representation of testing circuit 3 among Fig. 1.
The specific embodiment
The specific embodiment one: as shown in Figure 1 and Figure 2, it is made up of bellyband 1, piezoelectric film sensor array 2, testing circuit 3;
Be respectively arranged with VELCRO 1-1 on the both ends of bellyband 1, piezoelectric film sensor array 2 is arranged on the middle part of bellyband 1; Testing circuit 3 is arranged on the bellyband 1; Affiliated testing circuit 3 is made up of preposition differential amplifier circuit 3-1, filter circuit 3-2, mould/number conversion circuit 3-3, DSP module 3-4, memory module 3-5, interface module 3-6; The signal output bus of piezoelectric film sensor array 2 connects the signal input bus of preposition differential amplifier circuit 3-1, the signal output bus of preposition differential amplifier circuit 3-1 connects the signal input bus of filter circuit 3-2, the signal input bus of the signal output bus connection mode of filter circuit 3-2/number conversion circuit 3-3, the data-out bus of mould/number conversion circuit 3-3 connects the data input bus (DIB) of DSP module 3-4, the data storage output input bus end of the data storage output input bus end connected storage module 3-5 of DSP module 3-4, the data-out bus end of DSP module 3-4 is connected with the data-out bus end of interface module 3-6; Described DSP module 3-4 to fetus can quantity algorithm be: the first step, and utilize the Teager energy operator to give prominence to the high-energy zone (for example heart beating of fetus) of signal, following formula is adopted in the calculating of Teager energy operator:
Figure 310127DEST_PATH_IMAGE002
Wherein:
Figure 89864DEST_PATH_IMAGE004
Be the fetal heartbeat signal that receives,
Figure 485073DEST_PATH_IMAGE006
Be the Teager energy signal; In second step, the Teager energy signal is realized fetal heart frequency according to a preliminary estimate through auto-correlation processing; In the 3rd step, the signal that obtains after the auto-correlation processing obtains pairing frequency of peak point and energy after estimating to handle through peak value; In the 4th step, the energy signal that arrives that peak value is estimated obtains the pairing frequency of ceiling capacity, with the heart rate of this frequency as fetus through the energy comparison process; Described DSP module 3-4 to the algorithm of heart of fetus position is: on same plane, suppose that the coordinate position of heart of fetus position and described piezoelectric film sensor is respectively
Figure 299446DEST_PATH_IMAGE008
With
Figure 59591DEST_PATH_IMAGE010
, wherein
Figure 326624DEST_PATH_IMAGE012
,
Figure 525525DEST_PATH_IMAGE014
For sound source to the
Figure 194403DEST_PATH_IMAGE016
Range difference between the individual described piezoelectric film sensor can be expressed as with equation:
Figure 374718DEST_PATH_IMAGE018
In the formula,
Figure 129047DEST_PATH_IMAGE020
Be acoustic propagation velocity,
Figure 866059DEST_PATH_IMAGE022
For sound-source signal to the
Figure 389444DEST_PATH_IMAGE016
Individual described piezoelectric film sensor with to described piezoelectric film sensor
Figure 756972DEST_PATH_IMAGE024
Time delay value.By hyp definition as can be known, every pair of time delay can be determined a hyperbola, and then two pairs of time delays can be determined two hyperbolies, and these two hyp position of intersecting point are cardiac position.
Described piezoelectric film sensor array 2 is made of the multi-disc MEAS LDT0-028K of company, and preposition differential amplifier circuit 3-1 is made of multi-disc INA326 chip; Filter circuit 3-2 is made of multi-disc operational amplifier chip LF356; Mould/number conversion circuit 3-3 is made of multi-disc AD7091R; DSP module 3-4 model can be selected TMS320C674x low-power consumption Floating-point DSP for use; Memory module 3-5 model can be selected the 256MB DDR3 MT41J256M8 of Micron company chip for use; Interface module 3-6 model can be selected the AD8376 VGA of ADI company chip for use.
The central point of the central point of described piezoelectric film sensor array 2 and described bellyband 1, gravid woman's umbilicus is aimed at, particular location is that the heart point in described bellyband 1 is placed a piezoelectric film sensor, be symmetrical in the central point left side of described bellyband 1 in the horizontal direction, right both sides are placed four piezoelectric film sensors respectively, on the direction of navel level, distance between the adjacent described piezoelectric film sensor is 6 centimetres, in vertical direction, be symmetrical on the central point of described bellyband 1, a piezoelectric film sensor is placed at following two ends symmetry respectively, and the distance between the central point of piezoelectric film sensor on the vertical direction and bellyband 1 is 6 centimetres.
Operation principle: 2 pairs of heart of fetus jitter of piezoelectric film sensor array are monitored, piezoelectric film sensor array 2 passes through preposition differential amplifier circuit 3-1 with the above-mentioned signal that monitors, filter circuit 3-2, mould/number conversion circuit 3-3 sends among the DSP module 3-4, DSP module 3-4 is divided into two-way with described fetal heart rate signal 4, one tunnel process nonlinear filter is handled and is obtained corresponding fetal heart rate monitoring result, another road estimates that through time delay processing obtains the heart of fetus position, and fetal rhythm rate and heart of fetus position be recorded in real time among the memory module 3-5, simultaneously accordingly result is delivered to interface module 6.

Claims (2)

1. the array fetal rhythm based on piezoelectric film sensor is monitored bellyband, and it is made up of bellyband (1), a plurality of piezoelectric film sensor (2), testing circuit (3);
It is characterized in that being respectively arranged with VELCRO (1-1) on the both ends of bellyband (1), piezoelectric film sensor array (2) is arranged on the middle part of bellyband (1); Testing circuit (3) is arranged on the bellyband (1); Affiliated testing circuit (3) is made up of preposition differential amplifier circuit (3-1), filter circuit (3-2), mould/number conversion circuit (3-3), DSP module (3-4), memory module (3-5), interface module (3-6); The signal output bus of piezoelectric film sensor array (2) connects the signal input bus of preposition differential amplifier circuit (3-1), the signal output bus of preposition differential amplifier circuit (3-1) connects the signal input bus of filter circuit (3-2), the signal input bus of the signal output bus connection mode of filter circuit (3-2)/number conversion circuit (3-3), the data-out bus of mould/number conversion circuit (3-3) connects the data input bus (DIB) of DSP module (3-4), the data storage output input bus end of the data storage output input bus end connected storage module (3-5) of DSP module (3-4), the data-out bus end of DSP module (3-4) is connected with the data-out bus end of interface module (3-6); Described DSP module (3-4) to fetus can quantity algorithm be: the first step, and utilize the Teager energy operator to give prominence to the high-energy zone (for example heart beating of fetus) of signal, following formula is adopted in the calculating of Teager energy operator:
Figure 2013101913351100001DEST_PATH_IMAGE002
Wherein:
Figure 2013101913351100001DEST_PATH_IMAGE004
Be the fetal heartbeat signal that receives,
Figure 2013101913351100001DEST_PATH_IMAGE006
Be the Teager energy signal; In second step, the Teager energy signal is realized fetal heart frequency according to a preliminary estimate through auto-correlation processing; In the 3rd step, the signal that obtains after the auto-correlation processing obtains pairing frequency of peak point and energy after estimating to handle through peak value; In the 4th step, the energy signal that arrives that peak value is estimated obtains the pairing frequency of ceiling capacity, with the heart rate of this frequency as fetus through the energy comparison process; Described DSP module (3-4) to the algorithm of heart of fetus position is: on same plane, suppose that the coordinate position of heart of fetus position and described piezoelectric film sensor is respectively
Figure 2013101913351100001DEST_PATH_IMAGE008
With
Figure 2013101913351100001DEST_PATH_IMAGE010
, wherein
Figure 2013101913351100001DEST_PATH_IMAGE012
,
Figure 2013101913351100001DEST_PATH_IMAGE014
For sound source to the
Figure 2013101913351100001DEST_PATH_IMAGE016
Range difference between the individual described piezoelectric film sensor can be expressed as with equation:
Figure 2013101913351100001DEST_PATH_IMAGE018
In the formula,
Figure 2013101913351100001DEST_PATH_IMAGE020
Be acoustic propagation velocity,
Figure 2013101913351100001DEST_PATH_IMAGE022
For sound-source signal to the
Figure 607560DEST_PATH_IMAGE016
Individual described piezoelectric film sensor with to described piezoelectric film sensor
Figure 2013101913351100001DEST_PATH_IMAGE024
Time delay value, by hyp definition as can be known, every pair of time delay can be determined a hyperbola, then two pairs of time delays can be determined two hyperbolies, and these two hyp position of intersecting point are cardiac position.
2. a kind of array fetal rhythm monitoring bellyband according to claim 1 based on piezoelectric film sensor, it is characterized in that the central point of described piezoelectric film sensor array (2) and the central point of described bellyband (1), gravid woman's umbilicus is aimed at, particular location is that the heart point in described bellyband (1) is placed a piezoelectric film sensor, be symmetrical in the central point left side of described bellyband (1) in the horizontal direction, right both sides are placed four piezoelectric film sensors respectively, on the direction of navel level, distance between the adjacent described piezoelectric film sensor is 6 centimetres, in vertical direction, be symmetrical on the central point of described bellyband (1), a piezoelectric film sensor is placed at following two ends symmetry respectively, and the distance between the central point of piezoelectric film sensor on the vertical direction and bellyband (1) is 6 centimetres.
CN201310191335.1A 2013-05-22 2013-05-22 A kind of array fetal rhythm monitoring abdominal belt based on piezoelectric film sensor Active CN103222863B (en)

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Cited By (15)

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CN104361540A (en) * 2014-09-23 2015-02-18 深圳市前海安测信息技术有限公司 Maternal and fetal sign information management system and method based on network hospital
CN104352226A (en) * 2014-09-23 2015-02-18 深圳市前海安测信息技术有限公司 Wearable vital sign monitor and monitoring method
CN105167974A (en) * 2015-10-10 2015-12-23 安庆师范学院 Pressurizing device for waist and abdomen
CN105796095A (en) * 2016-01-22 2016-07-27 纳智源科技(唐山)有限责任公司 Fetal heart and fetal movement monitoring belt and monitoring device and system
CN107468232A (en) * 2017-09-05 2017-12-15 苏州风尚智选医疗科技有限公司 Fetal heart monitoring device and method
CN107713991A (en) * 2017-11-08 2018-02-23 四川大学 Sign detection means, method and system
CN108201449A (en) * 2017-12-28 2018-06-26 业成科技(成都)有限公司 The device of patch type monitoring pregnant state and the method for monitoring pregnant state
CN108652664A (en) * 2018-05-24 2018-10-16 上海拓萧智能科技有限公司 Abdominal belt, support abdomen trousers and baby's health is ask to monitor system
CN109068986A (en) * 2016-04-01 2018-12-21 奥丽特婴儿保健公司 Foetus health data monitoring
CN109124845A (en) * 2018-09-26 2019-01-04 杨松 The dedicated sensing abdominal belt of pregnant woman
CN111227820A (en) * 2020-02-21 2020-06-05 孙磊 Fetal heart detection sensor matrix of multidimensional channel sensor and fetal heart detection equipment
CN111265240A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitor and fetal heart measuring method
CN111265243A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitoring system, device and method based on multi-dimensional channel sensor
CN111265242A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitoring system, device and method
CN111419270A (en) * 2019-01-09 2020-07-17 无锡闻心电子科技有限责任公司 Wearable fetal sound collection detector, monitoring device, system and method

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Publication number Priority date Publication date Assignee Title
CN104352226A (en) * 2014-09-23 2015-02-18 深圳市前海安测信息技术有限公司 Wearable vital sign monitor and monitoring method
WO2016045140A1 (en) * 2014-09-23 2016-03-31 深圳市前海安测信息技术有限公司 Wearable vital signs monitoring instrument and monitoring method
CN104352226B (en) * 2014-09-23 2017-03-29 深圳市前海安测信息技术有限公司 Wearable vital sign monitor and monitoring method
CN104361540B (en) * 2014-09-23 2017-12-26 深圳市前海安测信息技术有限公司 Pregnant woman and fetus sign information management system and method based on network hospital
CN104361540A (en) * 2014-09-23 2015-02-18 深圳市前海安测信息技术有限公司 Maternal and fetal sign information management system and method based on network hospital
CN105167974A (en) * 2015-10-10 2015-12-23 安庆师范学院 Pressurizing device for waist and abdomen
CN105167974B (en) * 2015-10-10 2017-11-21 安庆师范大学 Waist and belly pressurization instrument
CN105796095A (en) * 2016-01-22 2016-07-27 纳智源科技(唐山)有限责任公司 Fetal heart and fetal movement monitoring belt and monitoring device and system
CN105796095B (en) * 2016-01-22 2018-12-25 纳智源科技(唐山)有限责任公司 Fetal rhythm movement of the foetus monitoring band, fetal rhythm monitoring device of fetal movement and system
CN109068986A (en) * 2016-04-01 2018-12-21 奥丽特婴儿保健公司 Foetus health data monitoring
CN107468232A (en) * 2017-09-05 2017-12-15 苏州风尚智选医疗科技有限公司 Fetal heart monitoring device and method
CN107713991A (en) * 2017-11-08 2018-02-23 四川大学 Sign detection means, method and system
CN108201449A (en) * 2017-12-28 2018-06-26 业成科技(成都)有限公司 The device of patch type monitoring pregnant state and the method for monitoring pregnant state
CN108652664A (en) * 2018-05-24 2018-10-16 上海拓萧智能科技有限公司 Abdominal belt, support abdomen trousers and baby's health is ask to monitor system
CN109124845A (en) * 2018-09-26 2019-01-04 杨松 The dedicated sensing abdominal belt of pregnant woman
CN111419270A (en) * 2019-01-09 2020-07-17 无锡闻心电子科技有限责任公司 Wearable fetal sound collection detector, monitoring device, system and method
CN111227820A (en) * 2020-02-21 2020-06-05 孙磊 Fetal heart detection sensor matrix of multidimensional channel sensor and fetal heart detection equipment
CN111265240A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitor and fetal heart measuring method
CN111265243A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitoring system, device and method based on multi-dimensional channel sensor
CN111265242A (en) * 2020-02-21 2020-06-12 孙磊 Fetal heart monitoring system, device and method

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