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Numéro de publicationCN103222863 B
Type de publicationOctroi
Numéro de demandeCN 201310191335
Date de publication18 mai 2016
Date de dépôt22 mai 2013
Date de priorité22 mai 2013
Autre référence de publicationCN103222863A
Numéro de publication201310191335.1, CN 103222863 B, CN 103222863B, CN 201310191335, CN-B-103222863, CN103222863 B, CN103222863B, CN201310191335, CN201310191335.1
Inventeurs樊家良, 杨强
Déposant哈尔滨工业大学
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  SIPO, Espacenet
一种基于压电薄膜传感器的阵列式胎心监测腹带 Based on the piezoelectric film sensor array fetal heart monitor cummerbund Langue du texte original : Chinois
CN 103222863 B
Résumé  Langue du texte original : Chinois
一种基于压电薄膜传感器的阵列式胎心监测腹带,本发明涉及对胎儿心脏的监测领域。 Based on the piezoelectric film sensor array fetal heart monitor cummerbund, the present invention relates to the field of fetal heart monitor. 它是为了解决现有胎心监测多是利用胎心音听诊器、超声多普勒胎音仪、单个传感器来进行胎心监测,它们存在误差大或属于“入侵式”的监测或精度低的问题。 It is to solve existing fetal heart monitor fetal heart tones mostly use a stethoscope, Doppler fetal tone instrument, a single sensor to monitor the fetal heart rate, they are large or errors are "intrusive" monitoring or low accuracy. 它的腹带的两端部上分别设置有魔术贴,压电薄膜传感器阵列设置在腹带的中部;检测电路设置在腹带上;所属检测电路由前置差分放大电路、滤波电路、模/数转换电路、DSP模块、存储器模块、接口模块组成。 Its both ends are provided with Velcro cummerbund, the piezoelectric film sensor array is set in the middle of the cummerbund; detecting circuit is provided on the cummerbund; detecting circuit owned by the front differential amplifier circuit, filter circuit, analog / digital conversion circuitry, DSP modules, memory modules, interface modules. 本发明所采用的压电薄膜传感器具有响应速度快、灵敏度高和线性度好的优点,能够保证检测的准确性;由于压电薄膜传感器质量小,柔软,耐用,其嵌入腹带后能够很好的与人体贴合,人机功效良好。 Piezoelectric film sensor of the present invention is used with fast response, high sensitivity and linearity, good benefits, to ensure the accuracy of detection; the quality of the piezoelectric thin film sensors small, soft, durable, well after its embedded cummerbund and considerate people together, good ergonomics.
Revendications(2)  Langue du texte original : Chinois
1. 一种基于压电薄膜传感器的阵列式胎屯、监测腹带,它是由腹带(1)、多个压电薄膜传感器(2)、检测电路(3)组成; 其特征在于腹带(1)的两端部上分别设置有魔术贴(1-1),多个压电薄膜传感器(2)按阵列排列设置在腹带(1)的中部;检测电路(3)设置在腹带(1)上;所述检测电路(3)由前置差分放大电路(3-1)、滤波电路(3-2)、模/数转换电路(3-3)、DSP模块(3-4)、存储器模块(3- 5)、接口模块(3-6)组成;压电薄膜传感器(2)阵列的信号输出总线连接前置差分放大电路(3-1)的信号输入总线,前置差分放大电路(3-1)的信号输出总线连接滤波电路(3-2)的信号输入总线,滤波电路(3-2)的信号输出总线连接模/数转换电路(3-3)的信号输入总线, 模/数转换电路(3-3)的数据输出总线连接DSP模块(3-4)的数据输入总线,DSP模块(3-4)的数据存储输出输入总线端连接存储器模块(3-5)的数据存储输出输入总线端,DSP模块(3-4)的数据输出总线端与接口模块(3-6)的数据输出总线端连接;所述DSP模块(3-4)对胎儿能量算法为:第一步,利用Teager能量算子突出信号的高能量区域,Teager能量算子的计算采用如下公式: y(n) =x2(nl)-x(nl)*x(n-2) 其中:x(n)为接收到的胎儿屯、跳信号,y(n)为Teager能量信号;第二步,Teager能量信号经过自相关处理实现胎儿屯、率的初步估计;第=步,自相关处理后得到的信号经过峰值估计处理后,得到峰值点所对应的频率和能量;第四步,峰值估计得到的能量信号经过能量比较处理,得到最大能量所对应的频率,将此频率作为胎儿的屯、率;所述DSP模块(3-4)对胎儿屯、脏位置的算法为:在同一平面,假设胎儿屯、脏位置与所述压电薄膜传感器的坐标位置分别为(x,y)和(xi,yi),其中i = 0,l,2……10,r^为声源到第j个所述压电薄膜传感器之间的距离差,用方程可表示为: An array-based tire Tuen piezoelectric film sensors, monitoring cummerbund, cummerbund it is (1), a plurality of piezoelectric film sensors (2), the detection circuit (3) composition; wherein cummerbund are provided with Velcro (1-1) (1) of both ends of the plurality of piezoelectric film sensor (2) arranged in an array disposed cummerbund (1) in the middle; detecting circuit (3) provided cummerbund (1); said detecting circuit (3) by the front differential amplifier circuit (3-1), a filter circuit (3-2), analog / digital conversion circuit (3-3), DSP modules (3-4) , memory modules (3-5), interface module (3-6) composition; piezoelectric film sensor (2) connected to the signal output of the pre-bus matrix differential amplifier circuit (3-1) of the input signal bus, front differential amplifier circuit (3-1) connected to the signal output bus filtering circuit (3-2) bus input signal, a filter circuit (3-2) connected to the output bus signal analog / digital conversion circuit (3-3) of the input signal bus, analog / digital conversion circuit (3-3) data output bus connection DSP module (3-4) of the data input bus, DSP module (3-4) for storing the output data bus input terminal connected memory module (3-5) of data storage input and output bus terminal, DSP module (3-4) data output bus terminal and the interface module (3-6) data output bus terminal is connected; the DSP module (3-4) on the fetus energy algorithm: first step using Teager energy operator prominent signal high energy region, Teager energy operator is calculated using the following equation: y (n) = x2 (nl) -x (nl) * x (n-2) where: x ( n) for the received fetus Tuen jump signal, y (n) is Teager energy signal; a second step, Teager energy signal through auto-correlation processing implementation fetus Tuen preliminary estimate rate; = the first step to obtain since the correlation processing after the peak signal estimate was treated to give the peak point corresponding to the frequency and energy; the fourth step, the peak energy of the signal energy estimate obtained through the comparison process to obtain maximum energy corresponding to the frequency, this frequency as the fetus Tuen rate ; the DSP module (3-4) on the fetus Tun, dirty location algorithm is: in the same plane, assuming fetal Tuen coordinate position dirty position of the piezoelectric thin film sensors were (x, y) and (xi , Yi), where i = 0, l, 2 ...... 10, r ^ is the j-th sound source from the piezoelectric film sensor to the difference between using the equation can be expressed as:
Figure CN103222863BC00021
式中,C为声传播速度,为声源信号到第j个所述压电薄膜传感器与到所述压电薄膜传感器(xo,yo)的时延值,由双曲线的定义可知,每对时延值确定一条双曲线,则两对时延值确定两条双曲线,且运两条双曲线的交点位置即为屯、脏位置。 Wherein, C is the sound propagation velocity, the sound source signals to the j-th to the piezoelectric film sensor and the piezoelectric film sensor (xo, yo) of delay values, seen from the definition of a hyperbola, for each pair delay value is determined by a hyperbola, the two pairs of two hyperbolic delay value is determined, and the transportation position is the intersection of two hyperbolic village, dirty place.
2. 根据权利要求1所述的一种基于压电薄膜传感器的阵列式胎屯、监测腹带,其特征在于所述压电薄膜传感器(2)阵列的中屯、点与所述腹带(1)的中屯、点、妊娠妇女的肚厮对准, 具体位置是在所述腹带(1)的中屯、点放置一个压电薄膜传感器,在水平方向上对称于所述腹带(1)的中屯、点左、右两侧分别放置四个压电薄膜传感器,在肚厮水平的方向上,相邻所述压电薄膜传感器之间的距离为6厘米,在垂直方向上,对称于所述腹带(1)的中屯、点上、下两端分别对称放置一个压电薄膜传感器,垂直方向上的压电薄膜传感器与腹带(1)的中屯、 点之间的距离为6厘米。 2. According to one claim 1, wherein the bead-based array Tuen piezoelectric film sensors, monitoring athletic, wherein said piezoelectric film sensor (2) array Tuen point and the cummerbund ( 1) in Tuen point, pregnant women belly servant aligned, the specific location in the athletic (1) in Tuen point where a piezoelectric film sensor horizontally symmetrical with respect to the cummerbund ( 1) in Tuen, point left and right sides of the piezoelectric thin film sensors were placed four in the belly servant horizontal direction, the distance between adjacent piezoelectric thin film sensors is 6 cm in the vertical direction, symmetrical to the athletic (1) in Tuen point, placed symmetrically at both ends between a piezoelectric thin film sensors, piezoelectric film sensors and athletic (1) in the vertical direction in Tuen point a distance of 6 cm.
Description  Langue du texte original : Chinois
一种基于压电薄膜传感器的阵列式胎心监测腹带 Based on the piezoelectric film sensor array fetal heart monitor cummerbund

技术领域 TECHNICAL FIELD

[0001 ]本发明涉及对胎儿心脏的监测领域。 [0001] The present invention relates to the field of fetal heart monitor.

背景技术 Background technique

[0002] 胎心监护在以往仅用于推测胎儿是否存活,现在则通过胎心监测,可以诊断胎儿能量储备能力和胎儿健康状况。 [0002] In the conventional fetal monitoring is used only speculate whether the survival of the fetus, and now by fetal heart monitor, diagnose fetal energy reserve capacity and fetal health. 胎心监测不仅可以诊断胎儿心脏功能,还可以诊断胎儿中枢神经系统功能,避免妊娠妇女子宫环境恶化对胎儿中枢神经造成不可挽回的损伤。 Not only can diagnose fetal heart monitor fetal heart function, can also diagnose fetal central nervous system function, pregnant women avoid environmental degradation of the uterine fetal central nervous irreparable damage. 胎心率是胎心监测的一个重要指标。 Fetal heart rate is an important indicator of fetal heart monitoring.

[0003] 早期的胎心监测多是利用胎心音听诊器来测量胎心率,存在误差大、抗干扰能力差,需要医生或者妊娠妇女手动操作的缺点。 [0003] Early fetal heart monitor fetal heart tones mostly use a stethoscope to measure fetal heart rate, the presence of error, anti-interference ability is poor, pregnant women need a doctor or a disadvantage manually. 目前在医院中广泛使用超声多普勒胎音仪作为胎心监测手段,这种方法主要原理是借助仪器主动发送超声波作用于胎儿,从胎儿各种组织对超声波的不同反射信号来获取胎心信息。 Now widely used Doppler fetal tone instrument fetal heart monitor in a hospital as a means of this method the main principle is the use of an ultrasonic instrument sends effect on the fetus, fetal heart rate information to obtain fetal tissue for a variety of different ultrasonic waves reflected signal. 显然,这是一种"入侵式"的监测方法。 Obviously, this is a kind of "intrusive" monitoring methods. 采用这种方法对胎儿进行持续监测安全性未知,存在对母体和胎儿的潜在危害。 With this method of continuous monitoring of the safety of the fetus is unknown, there is a potential for maternal and fetal harm. 采用单个传感器的胎心监测设备精度较低,测量结果受母体影响较大,并且不能对胎儿心脏位置做出估计。 Using a single sensor accuracy of lower fetal heart monitoring equipment, measurement results influenced by maternal and fetal heart can not make an estimate of the position.

发明内容 SUMMARY

[0004] 本发明的目的是提供一种基于压电薄膜传感器的阵列式胎心监测腹带,为了解决现有胎心监测多是利用胎心音听诊器、超声多普勒胎音仪、单个传感器来进行胎心监测,它们存在误差大或属于"入侵式"的监测或精度低的问题。 [0004] The object of the present invention is to provide a piezoelectric film based sensor array fetal heart monitor cummerbund, in order to solve existing fetal heart monitoring is the use of multiple fetal heart tone stethoscope, Doppler fetal tone instrument, a single sensor fetal heart rate monitoring, they are large or a low error "intrusive" monitoring or accuracy problems.

[0005] 所述的目的是通过以下方案实现的:所述的一种基于压电薄膜传感器的阵列式胎心监测腹带,是由腹带、多个压电薄膜传感器、检测电路组成; [0005] The purpose is achieved through the following programs: the array based on a fetal heart monitor cummerbund piezoelectric film sensor is athletic, a plurality of piezoelectric film sensors, detection circuit;

[0006] 腹带的两端部上分别设置有魔术贴,多个压电薄膜传感器按阵列排列设置在腹带的中部;检测电路设置在腹带上;所述检测电路由前置差分放大电路、滤波电路、模/数转换电路、DSP模块、存储器模块、接口模块组成;压电薄膜传感器阵列的信号输出总线连接前置差分放大电路的信号输入总线,前置差分放大电路的信号输出总线连接滤波电路的信号输入总线,滤波电路的信号输出总线连接模/数转换电路的信号输入总线,模/数转换电路的数据输出总线连接DSP模块的数据输入总线,DSP模块的数据存储输出输入总线端连接存储器模块的数据存储输出输入总线端,DSP模块的数据输出总线端与接口模块的数据输出总线端连接;所述DSP模块对胎儿能量算法为:第一步,利用Teager能量算子突出信号的高能量区域,Teager能量算子的计算采用如下公式: [0006] Both ends are provided with Velcro cummerbund, a plurality of piezoelectric film sensors arranged in an array is set in the middle of the cummerbund; detecting circuit is provided on the cummerbund; the detection circuit by the front differential amplifier circuit , filter circuit, analog / digital conversion circuit, DSP module, the memory module, the interface module; signal output bus connection of the piezoelectric film sensor array preamble signal of the differential amplifier circuit of the input bus, front differential amplifier circuit connected to the signal output bus signal input bus signal output bus connection mode signal input bus, filter circuit filter circuit / digital conversion circuits, data storage input and output bus terminal analog / digital conversion circuit data output bus connected to DSP module data input bus, DSP module attached storage module stores the output data bus input terminal, a data output bus terminal DSP module is connected to the interface module data output bus terminal; the DSP module to the fetus energy algorithm: first, the use of Teager energy operator prominent signal high energy region, Teager energy operator is calculated using the following formula:

[0007] y(n) =χ2(η_1 )_χ(η_1 )*x(n_2) [0007] y (n) = χ2 (η_1) _χ (η_1) * x (n_2)

[0008] 其中:x(n)为接收到的胎儿心跳信号,y(n)为Teager能量信号;第二步,Teager能量信号经过自相关处理实现胎儿心率的初步估计;第三步,自相关处理后得到的信号经过峰值估计处理后,得到峰值点所对应的频率和能量;第四步,峰值估计得到的能量信号经过能量比较处理,得到最大能量所对应的频率,将此频率作为胎儿的心率;所述DSP模块3-4对胎儿心脏位置的算法为:在同一平面,假设胎儿心脏位置与所述压电薄膜传感器的坐标位置分别为(x,y)和(Xl,yi),其中i=〇,l,2……10,^为声源到第j个所述压电薄膜传感器之间的距离差,用方程可表示为: r〇= (·γ ~ χ〇+ (-^ ~ y〇)" [0008] where: x (n) for the received fetal heartbeats, y (n) is Teager energy signal; a second step, Teager energy signal through the fetal heart rate to achieve self-related processing of preliminary estimates; the third step, the autocorrelation the processed signal obtained through the peak estimate was treated to give the peak point corresponding to the frequency and power; a fourth step, the peak energy of the signal energy estimation obtained through the comparison process, the energy corresponding to the maximum frequency, this frequency as the fetus heart rate; the DSP module 3-4 for fetal cardiac position algorithm is: in the same plane, assuming the position of the fetal heart and the piezoelectric film sensor are coordinate position (x, y) and (Xl, yi), where i = square, l, 2 ...... 10, ^ is the distance to the sound source of the j-th difference between the piezoelectric film sensor, the equation can be expressed by: r〇 = (· γ ~ χ〇 + (- ^ ~ y〇) "

[0009] Γ2=(.χ-λ-;)2 + (ν-ν0)2 Δγ = r. - r0 = ct. [0009] Γ2 = (. Χ-λ -;) 2 + (ν-ν0) 2 Δγ = r - r0 = ct..

[0010] 式中,c为声传播速度,^为声源信号到第j个所述压电薄膜传感器与到所述压电薄膜传感器(xq,y〇)的时延值,由双曲线的定义可知,每对时延值确定一条双曲线,贝>J两对时延值确定两条双曲线,且这两条双曲线的交点位置即为心脏位置。 [0010] wherein, c is the sound propagation speed, the sound source signals to ^ j-th sensor and the piezoelectric film sensor to the piezoelectric film (XQ, y〇) delay value, the hyperbola definition, each of the delay value is determined by a hyperbola, Tony> J two pairs of two hyperbolic delay value is determined, and this is the position of the intersection of two hyperbolic heart position.

[0011] 本发明所采用的压电薄膜传感器具有响应速度快、灵敏度高和线性度好的优点, 能够保证检测的准确性;由于压电薄膜传感器质量小,柔软,耐用,其嵌入腹带后能够很好的与人体贴合,人机功效良好。 [0011] The piezoelectric film sensor of the present invention is used with fast response, high sensitivity and linearity, good benefits, to ensure the accuracy of detection; the quality of the piezoelectric thin film sensors small, soft, durable, embedded after cummerbund It can be very good and thoughtful people together, good ergonomics.

[0012] 本发明只需在妊娠妇女腹部缠绕一条所述腹带,便能够对妊娠妇女胎心率进行实时监测,同时对妊娠妇女体内胎儿心脏位置做出估计,能满足孕妇在家中自我监测的需要, 并且存储的监测数据也能为医生提供参考,保证了妊娠妇女以及胎儿的健康。 [0012] The present invention is simply a wound in the abdomen of the pregnant women cummerbund, pregnant women will be able to perform real-time monitoring fetal heart rate, and make an estimate of the heart of the fetus in pregnant women, pregnant women can meet the self-monitoring at home needed, and monitoring the stored data can also provide a reference for doctors to ensure that pregnant women and fetal health.

附图说明 BRIEF DESCRIPTION

[0013] 图1是本发明的整体结构示意图; [0013] FIG. 1 is a schematic view of the overall structure of the present invention;

[0014] 图2是图1中检测电路3的结构示意图。 [0014] FIG. 2 is a block schematic diagram of a detecting circuit 3.

具体实施方式 detailed description

具体实施方式[0015] 一:如图1、图2所示,它是由腹带1、多个压电薄膜传感器2、检测电路3组成; DETAILED DESCRIPTION [0015] a: FIG. 1, FIG. 2, which is composed of a cummerbund, a plurality of piezoelectric film sensors 2, 3 composed of the detection circuit;

[0016] 腹带1的两端部上分别设置有魔术贴1-1,多个压电薄膜传感器2按阵列排列设置在腹带1的中部;检测电路3设置在腹带1上;所述检测电路3由前置差分放大电路3-1、滤波电路3-2、模/数转换电路3-3、DSP模块3-4、存储器模块3-5、接口模块3-6组成;压电薄膜传感器2阵列的信号输出总线连接前置差分放大电路3-1的信号输入总线,前置差分放大电路3-1的信号输出总线连接滤波电路3-2的信号输入总线,滤波电路3-2的信号输出总线连接模/数转换电路3-3的信号输入总线,模/数转换电路3-3的数据输出总线连接DSP模块3-4的数据输入总线,DSP模块3-4的数据存储输出输入总线端连接存储器模块3-5的数据存储输出输入总线端,DSP模块3-4的数据输出总线端与接口模块3-6的数据输出总线端连接;所述DSP模块3-4对胎儿能量算法为:第一步,利用Teager能量算子突出信号的高能量区域, Teager能量算子的计算采用如下公式: On both ends of the [0016] 1 cummerbund are provided with Velcro 1-1, a plurality of piezoelectric film sensors arranged in an array 2 is set in the middle cummerbund 1; detecting circuit 3 is provided on the cummerbund 1; the detection circuit 3 by the front differential amplifying circuit 3-1, filter circuits 3-2, analog / digital conversion circuits 3-3, DSP modules 3-4, 3-5 memory module, the interface module composed of 3-6; piezoelectric film sensor signal output bus 2 array connect front differential amplifier circuit input bus 3-1 signals, the pre-differential amplifier circuit connected to bus 3-1 signal output of the filter circuit 3-2 bus signal input filter circuit 3-2 output bus signal connection analog / digital conversion circuit input bus 3-3 signals, analog / digital conversion circuit 3-3, data output bus connected to DSP module input data bus 3-4, DSP module outputs the input data storage 3-4 terminal connection memory module stores the output data bus input terminal 3-5, DSP modules 3-4 data output bus terminal and data output bus interface module connected to terminals 3-6; 3-4 of the DSP module to the fetus energy algorithm as follows: First, the use of Teager energy operator prominent signal high energy region, Teager energy operator is calculated using the following formula:

[0017] y(n) =χ2(η_1 )_χ(η_1 )*x(n_2) [0017] y (n) = χ2 (η_1) _χ (η_1) * x (n_2)

[0018]其中:x(n)为接收到的胎儿心跳信号,y(n)为Teager能量信号;第二步,Teager能量信号经过自相关处理实现胎儿心率的初步估计;第三步,自相关处理后得到的信号经过峰值估计处理后,得到峰值点所对应的频率和能量;第四步,峰值估计得到的能量信号经过能量比较处理,得到最大能量所对应的频率,将此频率作为胎儿的心率;所述DSP模块3-4对胎儿心脏位置的算法为:在同一平面,假设胎儿心脏位置与所述压电薄膜传感器的坐标位置分别为(x,y)和(Xl,yi),其中i=〇,l,2……10,^为声源到第j个所述压电薄膜传感器之间的距离差,用方程可表示为: rn2 =(.T-.Yu)2+(j-jn)2 [0018] where: x (n) for the received fetal heartbeats, y (n) is Teager energy signal; a second step, Teager energy signal through the fetal heart rate to achieve self-related processing of preliminary estimates; the third step, the autocorrelation the processed signal obtained through the peak estimate was treated to give the peak point corresponding to the frequency and power; a fourth step, the peak energy of the signal energy estimation obtained through the comparison process, the energy corresponding to the maximum frequency, this frequency as the fetus heart rate; the DSP module 3-4 for fetal cardiac position algorithm is: in the same plane, assuming the position of the fetal heart and the piezoelectric film sensor are coordinate position (x, y) and (Xl, yi), where i = square, l, 2 ...... 10, ^ is the distance to the sound source of the j-th difference between the piezoelectric film sensor, the equation can be expressed by: rn2 = (. T-.Yu) 2+ (j -jn) 2

[0019] r;=(.x-.t;)2 + (vJ〇)2 Αη = η - Γ〇= CTf [0019] r; = (. X-.t;) 2 + (vJ〇) 2 Αη = η - Γ〇 = CTf

[0020] 式中,c为声传播速度,^为声源信号到第j个所述压电薄膜传感器与到所述压电薄膜传感器(xq,y〇)的时延值,由双曲线的定义可知,每对时延值确定一条双曲线,贝两对时延值确定两条双曲线,且这两条双曲线的交点位置即为心脏位置。 [0020] wherein, c is the sound propagation speed, the sound source signals to ^ j-th sensor and the piezoelectric film sensor to the piezoelectric film (XQ, y〇) delay value, the hyperbola definition, each of the delay value is determined by a hyperbola, shellfish two pairs of two hyperbolic delay value is determined, and this is the position of the intersection of two hyperbolic heart position.

[0021] 所述压电薄膜传感器2阵列由多片MEAS公司LDT0-028K构成,前置差分放大电路3-1由多片INA326芯片构成;滤波电路3-2由多片运算放大器芯片LF356构成;模/数转换电路3-3由多片AD7091R构成;DSP模块3-4型号可选用TMS320C674X低功耗浮点DSP;存储器模块3-5型号可选用Micron公司256MB DDR3MT41J256M8芯片;接口模块3-6型号可选用ADI公司AD8376VGA 芯片。 [0021] The piezoelectric film sensor array consisting of more than 2 pieces MEAS company LDT0-028K constituted by a pre-differential amplifier circuit 3-1 INA326 chip multi-chip constitution; filter circuit 3-2 by the multi-chip op-amp chip LF356 constitution; analog / digital conversion circuit 3-3 by a multi-chip AD7091R constitution; DSP module 3-4 models can be used TMS320C674X low-power floating point DSP; 3-5 memory module type can be used Micron's 256MB DDR3MT41J256M8 chip; Interface module 3-6 Model ADI's choice AD8376VGA chip.

[0022] 所述压电薄膜传感器2阵列的中心点与所述腹带1的中心点、妊娠妇女的肚脐对准,具体位置是在所述腹带1的中心点放置一个压电薄膜传感器,在水平方向上对称于所述腹带1的中心点左、右两侧分别放置四个压电薄膜传感器,在肚脐水平的方向上,相邻所述压电薄膜传感器之间的距离为6厘米,在垂直方向上,对称于所述腹带1的中心点上、下两端分别对称放置一个压电薄膜传感器,垂直方向上的压电薄膜传感器与腹带1的中心点之间的距离为6厘米。 [0022] The piezoelectric film sensor array 2 center and the athletic center 1, pregnant women aligned with the navel, the specific location of a piezoelectric film sensor is placed in the center of the cummerbund 1, symmetrical in the horizontal direction of the athletic center at 1 left and right sides of four piezoelectric film sensors were placed in the navel horizontal direction, the distance between adjacent piezoelectric film sensor is 6 cm in the vertical direction, the symmetry in the athletic center on 1 and lower ends, respectively, symmetrically placed a piezoelectric film sensor, proximity sensor and the piezoelectric film cummerbund vertical direction between the center point 1 6 cm.

[0023]工作原理:压电薄膜传感器2阵列对胎儿心脏跳动信号进行监测,压电薄膜传感器2阵列将上述监测到的信号通过前置差分放大电路3-1、滤波电路3-2、模/数转换电路3-3送入DSP模块3-4中,DSP模块3-4将所述胎心信号4分为两路,一路经过非线性滤波器处理得到相应的胎心率监测结果,另一路经过时延估计处理得到胎儿心脏位置,并将胎心率和胎儿心脏位置实时记录在存储器模块3-5中,同时把相应结果送至接口模块6。 [0023] Principle: 2 piezoelectric film sensor array for monitoring fetal heart beat signal, the piezoelectric film sensor array 2 above to monitor the signal through the pre-differential amplifier circuit 3-1, 3-2 filter circuit, analog / digital conversion circuit 3-3 into the DSP module 3-4, 3-4 DSP block the fetal heart signal 4 is divided into two, all the way through to give the corresponding nonlinear filter processing fetal heart rate monitoring results, and the other way after delay estimation process to obtain the position of the fetal heart and fetal heart rate and fetal heart in real time the position is recorded in the memory module 3-5, while the corresponding results to the interface module 6.

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
CN2358833Y *4 sept. 199719 janv. 2000北京中方荣科技有限公司Binder type mornitoring instrument for fetal heart sound
CN2790407Y *10 mai 200528 juin 2006北京奥瑞赛斯传感技术有限公司Digital fetus cardiac sound measuring device
CN102068249A *23 nov. 200925 mai 2011财团法人工业技术研究院Maternal fetus monitoring device and method
CN102370496A *9 sept. 201114 mars 2012北京大学深圳研究生院Fetal heart sound monitoring instrument based on piezoelectric thin-film sensor
US4960118 *1 mai 19892 oct. 1990Pennock Bernard EMethod and apparatus for measuring respiratory flow
Classifications
Classification internationaleA61B5/0245
Événements juridiques
DateCodeÉvénementDescription
31 juil. 2013C06Publication
28 août 2013C10Entry into substantive examination
18 mai 2016C14Grant of patent or utility model