CN108236476B - Method and system for determining optimal position of fetal heart detection - Google Patents

Abstract

The invention discloses a method and a system for determining an optimal position for fetal heart rate detection. , determine and display multiple possible fetal heart positions during this fetal heart detection; then, detect the signal corresponding to each possible fetal heart position; finally, according to the detected signals corresponding to each possible fetal heart position, the maximum intensity The possible fetal heart position corresponding to the signal is determined as the best position for the current fetal heart detection, and the determined best position for the current fetal heart detection is displayed, thereby helping the user to quickly and accurately determine the best position for the fetal heart detection.

Description

A method and system for determining the best position for fetal heart rate detection

technical field

The invention relates to the technical field of medical monitoring, in particular to a method and a system for determining an optimal position for fetal heart rate detection.

Background technique

Fetal heart rate is the heartbeat of the fetus. Fetal heart rate monitoring is to use the principle of ultrasound to monitor the condition of the fetus in the uterus, and it is the main detection method to correctly assess the condition of the fetus in the uterus. The fetal heartbeat is regulated by the sympathetic and parasympathetic nerves. By tracing the curve of the monitoring graph formed by the instantaneous fetal heartbeat change, the response of the fetal heartbeat during fetal movement and uterine contraction can be understood, so as to speculate whether the fetus has hypoxia in the uterus.

Fetal heart rate examination is a necessary procedure for pregnancy examination. At present, there are many portable home fetal heart rate monitors on the market, allowing users to monitor fetal heart rate at any time in the home environment to determine whether the fetal development is normal. As shown in Figure 1, the fetal heart position x varies with pregnancy. Specifically, as shown in a in Figure 1, it is the fetal heart position when the pregnant woman is about four to six months pregnant; as shown in b in Figure 1, it is the fetal heart rate when the pregnant woman is about six to eight months pregnant Position; as shown in c in Figure 1, it is the fetal heart position when the pregnant woman is about eight to ten months pregnant. Even if users who lack professional knowledge and experience spend a lot of time measuring, it is easy to find the position of the fetal heart rate. The fetal heart rate detected at the non-fetal heart position is likely to have abnormal conditions such as weak fetal heart sound and abnormal curve, which may cause the user to mistakenly believe that the fetal development is abnormal, thus causing great mental stress and distress to the user.

Most of the prior art is to improve the structure of the fetal heart rate monitor or the method for detecting the fetal heart rate, and does not involve a method for helping the user to quickly and accurately find the best position for detecting the fetal heart rate. Therefore, how to help the user to quickly and accurately determine the fetal heart rate Detecting the best position is a technical problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and system for determining the optimal position for fetal heart rate detection, which are used to solve the problem of how to help users quickly and accurately determine the optimal position for fetal heart rate detection in the prior art.

An embodiment of the present invention provides a method for determining an optimal position for fetal heart rate detection, including:

Determine and display multiple possible fetal heart positions during this fetal heart detection according to the best position of fetal heart detection determined in any of the previous fetal heart detections and the gestational age and abdominal circumference at the current fetal heart detection;

Detecting the signal corresponding to each of the possible fetal heart positions;

According to the detected signals corresponding to the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the highest intensity is determined as the best position for this fetal heart detection, and the determined fetal heart detection is displayed. Best location.

In a possible implementation manner, in the above-mentioned determination method provided in the embodiment of the present invention, the optimal position for fetal heart rate detection determined according to any one of the previous fetal heart rate detections recorded and the pregnancy rate at the current fetal heart rate detection Week and abdominal circumference to determine multiple possible fetal heart locations during this fetal heart test, including:

According to the best position for fetal heart rate detection determined at any one time in the previous fetal heart rate detection, the gestational age and abdominal circumference corresponding to the best position for fetal heart rate detection determined at any one time, and the gestational age and abdominal circumference during the current fetal heart rate detection , to build a correlation spheroid model that simulates fetal development between two fetal heart tests;

According to the optimal fetal heart detection position determined at any one time, and the constructed correlation spheroid model for simulating fetal development between the two fetal heart detection detections, a plurality of possible fetal heart positions are determined.

In a possible implementation manner, in the above-mentioned determination method provided by the embodiment of the present invention, the optimal position for fetal heart rate detection determined according to any one of previous fetal heart rate detections, the fetal heart rate detection determined at any one time is the most optimal position for fetal heart rate detection. The gestational age and abdominal circumference corresponding to the optimal position, as well as the gestational age and abdominal circumference at the time of the fetal heart rate detection, are used to construct an associated spheroid model that simulates fetal development between the two fetal heart rate detections, including:

According to the gestational age and abdominal circumference during any one fetal heart detection, determine the spherical radius of the spheroid model corresponding to the simulated fetal development during any one fetal heart detection;

According to the gestational age and abdominal circumference during this fetal heart detection, determine the sphere radius of the sphere model corresponding to the simulated fetal development during this fetal heart detection;

According to the gestational age during the two fetal heartbeat detections, determine the distance between the spherical centers of the spherical model simulating fetal development corresponding to the fetal heartbeat detection at any one time and the fetal heart detection at this time;

According to the determined spheroid radius of the spheroid model simulating fetal development corresponding to the two fetal heart detections, and the spheres of the spheroid model simulating fetal development respectively corresponding to any one fetal heart detection and this fetal heart detection The distance between the hearts is used to construct a correlative spheroid model simulating fetal development between the two fetal heart detections with the same section.

In a possible implementation manner, in the above determination method provided by the embodiment of the present invention, the optimal position for fetal heart rate detection determined according to any one time, and the constructed interval between the two fetal heart rate detections A correlative spheroid model that simulates fetal development and determines multiple possible fetal heart locations, including:

According to the determined spheroid radius of the spheroid model for simulating fetal development during any one time of fetal heart detection, the spheroid radius of the spheroid model for simulating fetal development during the current fetal heart detection, and The distance between the spherical centers of the spheroid model that simulates fetal development at the time of the fetal heart rate detection and the fetal heart rate detection time respectively, and the fetal heart rate position during this fetal heart rate detection is determined relative to the optimal position of the fetal heart rate detection determined in any one time. the offset;

Taking the determined optimal position of fetal heart rate detection as the vertex, the determined offset is the radius, and the vertex angle is determined to be a fan-shaped area of 90 degrees, and the midpoint of the arc of the fan-shaped area is located at Right below the best position for fetal heart rate detection determined at any one time;

The sector-shaped area boundary is determined as a plurality of positions where the fetal heart may exist.

In a possible implementation manner, in the above determination method provided by the embodiment of the present invention, the detecting a signal corresponding to each of the possible fetal heart positions specifically includes:

A microphone array is used to simultaneously detect the sound signal corresponding to each of the possible fetal heart positions.

In a possible implementation manner, in the above determination method provided by the embodiment of the present invention, according to the detected signals corresponding to each of the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the highest intensity is determined Before the best position for this fetal heart rate detection, it also includes:

Filter the ambient noise and maternal heartbeat sound in each of the sound signals corresponding to the position of the fetal heart that are detected simultaneously by the microphone array.

In a possible implementation manner, in the above determination method provided by the embodiment of the present invention, the detecting a signal corresponding to each of the possible fetal heart positions specifically includes:

The fetal heart rate signal corresponding to each of the possible fetal heart positions is sequentially detected by the fetal heart rate instrument.

In a possible implementation manner, the above determination method provided by the embodiment of the present invention further includes:

According to the displayed and determined optimal position for the current fetal heart rate detection, a fetal heart rate meter is used to measure the fetal heart rate value of the current fetal heart rate detection optimal position.

In a possible implementation manner, the above determination method provided by the embodiment of the present invention further includes:

Among the sound signals corresponding to each of the possible fetal heart positions detected simultaneously by the microphone array, determine the sound signal with the largest intensity and the sound signal with the smallest intensity;

determining the difference between the sound signal with the highest intensity and the sound signal with the smallest intensity as the fetal heart signal;

The reciprocal of the time difference between two adjacent maximum values determined after the square of the fetal heart rate signal is determined as the fetal heart rate value at the optimal position of the current fetal heart rate detection.

The embodiment of the present invention also provides a system for determining the optimal position of fetal heart rate monitoring, including:

The processor is configured to determine a plurality of possible fetal heart positions during this detection according to the best position for fetal heart detection determined at any one of the recorded previous fetal heart detections and the gestational age and abdominal circumference during the current fetal heart detection; According to the detected signals corresponding to each of the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the highest intensity is determined as the best position for this fetal heart detection;

a detector, used for detecting the signal corresponding to each of the possible fetal heart positions;

The display is used for displaying a plurality of possible fetal heart positions during the current detection, and displaying the determined optimal position for the current fetal heart detection.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the processor is specifically configured to determine the best position for fetal heart rate detection according to any one of previous fetal heart rate detections, and the any one The gestational age and abdominal circumference corresponding to the determined optimal position of fetal heart rate detection, as well as the gestational age and abdominal circumference at the time of this fetal heart rate detection, are used to construct an associated spheroid model for simulating fetal development between two fetal heart rate detections; The best position for fetal heart rate detection determined at any one time, and the constructed correlation spheroid model for simulating fetal development between the two fetal heart rate detections, determine a plurality of possible fetal heart positions.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the processor is specifically configured to determine the fetal heart rate at any one time according to the gestational age and abdominal circumference at any one time of fetal heart rate detection The spheroid radius of the spheroid model corresponding to simulating fetal development during detection; according to the gestational age and abdominal circumference during this fetal heart detection, determine the spheroid radius of the spheroid model corresponding to simulating fetal development during this fetal heart detection; The gestational age when the fetal heart rate is detected, determine the distance between the spherical centers of the spheroid models simulating fetal development that correspond to each of the fetal heart rate detections and the current fetal heart rate detection; The spheroid radius of the spheroid model simulating fetal development corresponding to each time, and the distance between the spheroid centers of the spheroid model simulating fetal development corresponding to any one of the fetal heart detection and this fetal heart detection, respectively. A correlative spheroid model simulating fetal development between the two fetal heart rate measurements of the same slice.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the processor is specifically configured to determine according to the determined spheroid model of fetal development corresponding to any one of the fetal heart detections. Sphere radius, the sphere radius of the sphere model simulating fetal development corresponding to this fetal heart detection, and the difference between the sphere centers of the sphere model simulating fetal development corresponding to any fetal heart detection and this fetal heart detection. The distance between the two, determine the offset of the fetal heart position during the current fetal heart detection relative to the optimal position of the fetal heart detection determined at any time; taking the optimal fetal heart detection position determined at any time as the vertex, The determined offset is a radius, a fan-shaped area with an apex angle of 90 degrees is determined, and the midpoint of the arc of the fan-shaped area is located just below the optimal position for fetal heart rate detection determined at any one time; The sector-shaped area boundary is determined as a plurality of positions where the fetal heart may exist.

In a possible implementation manner, in the above-mentioned determination system provided in the embodiment of the present invention, the detector may be a detector capable of simultaneously detecting fetal heart signals at at least two positions or multiple positions, such as a microphone array , for simultaneously detecting fetal heart signals in at least two positions or multiple positions, for example, each of the possible sound signals corresponding to the fetal heart positions exists.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the processor is further configured to filter the sound signals corresponding to each of the possible fetal heart positions detected simultaneously by using a microphone array of ambient noise and maternal heartbeat sounds.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the detector is a fetal heart rate monitor, which is specifically configured to sequentially detect the fetal heart rate signals corresponding to each of the possible fetal heart positions.

In a possible implementation manner, the above-mentioned determination system provided in the embodiment of the present invention further includes: a fetal heart rate meter, configured to measure the optimal position of the fetal heart rate detection this time according to the displayed determined optimal position. Describe the fetal heart rate value at the best position for this fetal heart rate detection.

In a possible implementation manner, in the above-mentioned determination system provided by the embodiment of the present invention, the processor is further configured to use the microphone array to detect the sound signal corresponding to each of the possible fetal heart positions simultaneously , determine the sound signal with the largest intensity and the sound signal with the smallest intensity; determine the difference between the sound signal with the largest intensity and the sound signal with the smallest intensity as the fetal heart signal; The reciprocal of the time difference between two adjacent maximum values is determined as the fetal heart rate value at the optimal position of the current fetal heart rate detection.

The beneficial effects of the present invention are as follows:

A method and system for determining the best position for fetal heart rate detection provided by the embodiments of the present invention include: the best position for fetal heart rate detection determined according to any one of the previous fetal heart rate detections recorded and the gestational age during the current fetal heart rate detection. and abdominal circumference, determine and display multiple possible fetal heart positions during this fetal heart detection; detect the signal corresponding to each possible fetal heart position; The possible fetal heart position corresponding to the signal is determined as the best position for the current fetal heart detection, and the determined best position for the current fetal heart detection is displayed. Because firstly, based on the best position of fetal heart detection determined in any previous fetal heart detection and the gestational age and abdominal circumference of this fetal heart detection, it is determined that there are multiple possible fetal heart positions in this fetal heart detection, and then The best position of the fetal heart rate detection is determined from multiple possible fetal heart positions, and the determined best position of the fetal heart rate detection is displayed. Therefore, it is realized to help the user to quickly and accurately determine the best fetal heart rate detection position. Location.

Description of drawings

Fig. 1 is the schematic diagram of the fetal heart position corresponding to different gestational age;

2 is a flowchart of a method for determining an optimal position for fetal heart rate detection provided by an embodiment of the present invention;

3 is a schematic diagram of an associated spheroid model for simulating fetal development between two fetal heart rate detections provided by an embodiment of the present invention;

4 is a schematic diagram of a plurality of possible fetal heart positions provided by an embodiment of the present invention;

5 is a schematic diagram of using a microphone array to simultaneously detect sound signals corresponding to each possible fetal heart position according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a system for determining an optimal position for fetal heart rate detection according to an embodiment of the present invention.

Detailed ways

The specific implementations of the method and system for determining the optimal position for fetal heart rate detection provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

A method for determining an optimal position for fetal heart rate detection provided by an embodiment of the present invention, as shown in FIG. 2 , specifically includes the following steps:

S201. Determine and display a plurality of possible fetal heart positions during the current fetal heart detection according to the best position of the fetal heart detection determined at any one of the recorded previous fetal heart detections and the gestational age and abdominal circumference during the current fetal heart detection. ;

S202. Detect signals corresponding to each possible fetal heart position;

S203. According to the detected signals corresponding to each possible fetal heart position, determine the possible fetal heart position corresponding to the signal with the highest intensity as the best position for the current fetal heart detection, and display the determined best fetal heart detection position for this time. Location.

Specifically, in the above determination method provided by the embodiment of the present invention, firstly, based on the optimal position of the fetal heart rate detection determined at any one of the previous fetal heart rate detections and the gestational age and abdominal circumference during the current fetal heart rate detection, the determination is made. In this fetal heart rate detection, there are multiple possible fetal heart positions, and then the best position for this fetal heart rate detection is determined from the multiple possible fetal heart rate positions, and the determined optimal position for this fetal heart rate detection is displayed. Therefore, it is realized to help the user to quickly and accurately determine the best position for fetal heart rate detection.

In specific implementation, in the above determination method provided by the embodiment of the present invention, step S201 is based on the best position for fetal heart rate detection determined at any one of the previous fetal heart rate detections recorded and the gestational age and abdominal circumference during the current fetal heart rate detection. , to determine that there are multiple possible fetal heart positions during this fetal heart rate detection, which can be achieved in the following ways:

According to the best position of fetal heart rate detection determined at any one time in the previous fetal heart rate detection, the gestational age and abdominal circumference corresponding to the best position of fetal heart rate detection determined at any time, and the gestational age and abdominal circumference of this fetal heart rate detection, construct A correlative spheroid model that simulates fetal development between two fetal heart tests;

According to the best position of fetal heart detection determined at any one time, and the constructed correlation spheroid model for simulating fetal development between two fetal heart detections, multiple possible fetal heart positions are determined.

It should be noted that, if there is a corresponding spheroid model for simulating fetal development at the best position for fetal heart rate detection determined at any time, step S201 is based on the best position for fetal heart rate detection determined at any one time in the recorded previous fetal heart rate tests and this time. The gestational age and abdominal circumference at the time of fetal heart rate detection, to determine multiple possible fetal heart positions during this fetal heart rate detection, can also be achieved in the following ways:

According to the best position of fetal heart rate detection determined at any one time in previous fetal heart rate detection, the gestational age corresponding to the best position of fetal heart rate detection and the spheroid model for simulating fetal development, and the gestational age and Abdominal circumference, to construct a correlative spheroid model that simulates fetal development between two fetal heart rates;

According to the best position of fetal heart detection determined at any one time, and the constructed correlation spheroid model for simulating fetal development between two fetal heart detections, multiple possible fetal heart positions are determined.

In specific implementation, in the specific implementation of step S201 of the above determination method provided by the embodiment of the present invention, according to the best position for fetal heart rate detection determined at any time in previous fetal heart rate detections, the best fetal heart rate detection at any time is determined. The gestational age and abdominal circumference corresponding to the position, as well as the gestational age and abdominal circumference at the time of the fetal heart rate detection, construct an associated spheroid model that simulates fetal development between the two fetal heart rate detections, which can be achieved in the following ways:

According to the gestational age and abdominal circumference of any fetal heart detection, determine the sphere radius of the sphere model that simulates fetal development corresponding to any fetal heart detection;

According to the gestational age and abdominal circumference during this fetal heart detection, determine the sphere radius of the sphere model corresponding to the simulated fetal development during this fetal heart detection;

According to the gestational age of the two fetal heartbeat detections, determine the distance between the spherical centers of the spherical model simulating fetal development corresponding to any one fetal heart detection and this fetal heart detection respectively;

According to the determined spheroid radius of the spheroid model simulating fetal development corresponding to the two fetal heart detections, and the difference between the sphere centers of the spheroid model simulating fetal development corresponding to any one fetal heart detection and this fetal heart detection, respectively The distance between the two fetal heart rate detections with the same section was constructed to simulate the fetal development.

计算得到；本次胎心检测时对应的模拟胎儿发育的球体模型的球体半径为r₁可以使用公式

计算得到。其中，

和

是修正因子，该修正因子是在进行大量个体实验之后得到的一个经验值，可以消除利用腹围计算拟胎儿发育的球体模型的球体半径时的误差。Specifically, in the above determination method provided by the embodiment of the present invention, it is assumed that the best position for fetal heartbeat detection determined at any time is p, and the gestational age corresponding to the best position p for fetal heartbeat detection determined at any time is w ₀ , the abdominal circumference is b ₀ , and the sphere radius of the spheroid model corresponding to simulating fetal development in any fetal heart detection is r ₀ ; the gestational age in this fetal heart detection is w ₁ , and the abdominal circumference is b ₁ . The spherical radius of the corresponding spherical model simulating fetal development is r ₁ . Then, as shown in Figure 3, the sphere radius of the sphere model for simulating fetal development during any fetal heart rate detection is r ₀ , the formula can be used

Calculated; the sphere radius of the sphere model corresponding to simulating fetal development in this fetal heart detection is r ₁ , and the formula can be used

Calculated. in,

and

is a correction factor, the correction factor is an empirical value obtained after a large number of individual experiments, which can eliminate the error when calculating the sphere radius of the sphere model of the quasi-fetal development using the abdominal circumference.

那么通过将任一次确定的胎心检测最佳位置p对应的孕周w₀，以及本次胎心检测时的孕周w₁带入公式：

即可计算出球心之间的距离

其中，a为一个常量系数，是大量实验之后得到的一个经验值。Further, it is assumed that the distance between the sphere centers of the sphere models simulating fetal development corresponding to any fetal heart rate detection and the current fetal heart rate detection is as follows:

Then, by bringing the gestational week w ₀ corresponding to the best position p of fetal heart rate detection at any time, and the gestational week w ₁ at the time of this fetal heart rate detection into the formula:

The distance between the centers of the spheres can be calculated

Among them, a is a constant coefficient, which is an empirical value obtained after a large number of experiments.

显然，基于参数r₀、r₁、和

可以构建出多种表征两次胎心检测之间的模拟胎儿发育的关联球体模型。较佳地，为了便于得到本次胎心检测时的可能的胎心位置，如图3所示，可以基于参数r₀、r₁、和

构建出具有相同切面q的两次胎心检测之间的模拟胎儿发育的关联球体模型。Through the above calculation, the sphere radius r ₀ of the sphere model simulating fetal development corresponding to any fetal heart rate detection, the sphere radius r ₁ of the sphere model simulating fetal development corresponding to this fetal heart rate detection, and any fetal heart rate detection are obtained. The distance between the sphere centers of the sphere model simulating fetal development corresponding to the heart detection and this fetal heart detection respectively

Obviously, based on the parameters r ₀ , r ₁ , and

A variety of correlative spheroid models can be constructed that characterize the simulated fetal development between two fetal heart rate measurements. Preferably, in order to facilitate obtaining the possible fetal heart position during this fetal heart rate detection, as shown in FIG. 3 , the parameters r ₀ , r ₁ , and

A correlative spheroid model simulating fetal development was constructed between two fetal heart rate measurements with the same slice q.

Specifically, in the specific implementation of step S201 of the above determination method provided by the embodiment of the present invention, the optimal position of fetal heart rate detection is determined according to any one time, and the simulated fetal development between two fetal heart rate detections is constructed. Associate the sphere model to determine multiple possible fetal heart positions, as shown in Figure 3, which can be achieved in the following ways:

利用公式

确定本次胎心检测时的胎心位置相对于任一次确定的胎心检测最佳位置p的偏移量r_Δ，其中，Δr＝r₁-r₀；According to the determined spheroid radius r ₀ of the spheroid model simulating fetal development during any fetal heart detection, the spheroid radius r ₁ of the spheroid model simulating fetal development during this fetal heart detection, and any fetal heart detection The distance between the sphere centers of the sphere model simulating fetal development corresponding to this time and the fetal heart detection time

Use the formula

Determine the offset r _Δ of the position of the fetal heart during the current fetal heart detection relative to the optimal position p of the fetal heart detection determined at any time, wherein Δr=r ₁ -r ₀ ;

As shown in FIG. 4 , taking the determined optimal position p for fetal heart rate detection as the vertex, the determined offset r _Δ as the radius, and determining the fan-shaped area with the vertex angle of 90 degrees. Preferably, in order to find the position of the fetal heart rate more accurately, the midpoint of the arc of the fan-shaped area is located just below the optimal position p for fetal heart rate detection determined at any time;

The sector-shaped area boundaries are determined as multiple locations where fetal hearts may exist.

Specifically, in the above determination method provided in the embodiment of the present invention, step S202 detects signals corresponding to each possible fetal heart position, which may be implemented in the following but not limited to the following manners, which are not limited here. For example, a microphone array can be used to simultaneously detect sound signals corresponding to each possible fetal heart position. For another example, a fetal heart rate monitor may also be used to sequentially detect fetal heart signals corresponding to each possible fetal heart position.

Preferably, in the above determination method provided by the embodiment of the present invention, when the implementation of step S202 is to use a microphone array to simultaneously detect sound signals corresponding to each possible fetal heart position, in step S203, according to the detected sound signals of each possible presence For the signal corresponding to the fetal heart position, before determining the possible fetal heart position corresponding to the signal with the highest intensity as the best position for the current fetal heart detection, it may also include: filtering the signals corresponding to each possible fetal heart position simultaneously detected by the microphone array. Environmental noise and maternal heartbeat sound in the sound signal to obtain a better quality fetal heartbeat signal.

Further, in S203 in the above-mentioned determination method provided by the embodiment of the present invention, according to the detected signals corresponding to each possible fetal heart position, the possible fetal heart position corresponding to the signal with the greatest intensity is determined as the best fetal heart detection for this time. After displaying the determined optimal position of the fetal heart rate detection, the fetal heart rate value of the optimal position of the fetal heart rate detection can also be obtained by the following but not limited to the following methods, which are not limited here:

For example, according to the displayed and determined best position for the current fetal heart rate detection, the fetal heart rate value of the current best position for the current fetal heart rate detection can be obtained by directly measuring the fetal heart rate instrument. For another example, a microphone array can also be used to indirectly obtain the fetal heart rate value at the best position for the fetal heart rate detection.

Specifically, in the above determination method provided by the embodiment of the present invention, the microphone array is composed of a plurality of high-precision microphones, and the number and precision of the microphones can be set according to the actual situation, which is not limited here. For example, as shown in FIG. 5 , the microphone array 501 is composed of five high-precision microphones s ₁ , s ₂ , . . . , s ₅ . A microphone array 501 composed of high-precision microphones s ₁ , s ₂ , . . . , s ₅ is used to simultaneously detect sound signals corresponding to each possible fetal heart position. At time t, the sound signals received by the microphones s ₁ , s ₂ , ..., s ₅ are respectively s ₁ (t), s ₂ (t), ..., s ₅ (t). The signal strengths of signals s ₁ (t), s ₂ (t), ..., s ₅ (t) are respectively P ₁ (t), P ₂ (t), ..., P ₅ (t). Find the strongest sound signal S _max (t) and the weakest sound signal S _min (t). Since the weakest signal S _min (t) contains fewer fetal heart sounds, most of which are ambient noise and maternal heartbeat sounds, the strongest sound signal S _max (t) and the smallest sound signal S _min can be compared The difference in (t) was determined as the fetal heart rate signal. That is, the strongest signal S _max (t) is purified by the above method, so as to obtain the fetal heart signal S(t) with better quality, and S(t)=S _max (t)-S _min (t). Of course, the strongest sound signal S _max (t) can also be purified directly by filtering the ambient noise and maternal heartbeat sound in the strongest sound signal S _max (t), which is not limited herein. Then, square the fetal heart signal S(t) with better quality, and determine the time difference Δt between the two adjacent maximum values according to the squared fetal heart signal S(t) ² , the reciprocal of the time difference Δt 1/Δt is the fetal heart rate value at the best position for this fetal heart rate detection.

It is worth noting that, in the above determination method provided by the embodiment of the present invention, the sound signal at different positions of the abdomen can also be collected only by using a microphone array, and the environmental noise and maternal heartbeat sound in each sound signal can be filtered out to determine the filter. The position of the microphone corresponding to the final sound signal with the highest intensity is the best position for fetal heart rate detection. The microphone array can be connected with a smart terminal such as a mobile phone wirelessly or by wire, so that the best position for fetal heart detection can be displayed to the user in the abdominal schematic diagram of the mobile phone software (Application, APP).

It can be seen that, in the above determination method provided by the embodiment of the present invention, based on pure software or the method of auxiliary microphone array hardware, the best position, gestational age, and abdominal circumference of historical fetal heart detection are integrated to calculate the optimal fetal heart detection position for this time. The best position is displayed to the user through the mobile APP, so as to help the user find the best position for fetal heart rate detection.

Based on the same inventive concept, the embodiments of the present invention also provide a system for determining the optimal position for fetal heart rate detection. The methods are similar, therefore, for the implementation of the determination system, reference may be made to the implementation of the determination method described above, and repeated descriptions will not be repeated.

The system for determining the optimal position of fetal heart rate detection provided by the embodiment of the present invention, as shown in FIG. 6 , includes:

The processor 601 is configured to determine a plurality of possible fetal heart positions during this detection according to the best position for fetal heart detection determined at any one time in the recorded previous fetal heart detection and the gestational age and abdominal circumference during this fetal heart detection. ; According to the detected signals corresponding to each possible fetal heart position, the possible fetal heart position corresponding to the signal with the greatest intensity is determined as the best position for this fetal heart detection;

a detector 602, configured to detect a signal corresponding to each possible fetal heart position;

The display 603 is configured to display a plurality of possible fetal heart positions during the current detection, and display the determined optimal position for the current fetal heart detection.

Specifically, in the above determination system provided by the embodiment of the present invention, the display 603 may be any product or component with a display function, such as a mobile phone and a computer. When the display 603 is a mobile phone, the schematic diagram of the abdomen of the mobile phone APP can display a plurality of possible fetal heart positions during the current detection, and display the determined optimal position of the fetal heart rate detection, so as to facilitate the user according to the abdomen of the mobile phone APP. The position shown in the schematic diagram was used to detect the fetal heart rate.

During specific implementation, in the above-mentioned determination system provided by the embodiment of the present invention, the processor 601 may be specifically configured to detect the best position of the fetal heart rate according to any one of the previous fetal heart rate detections, and the best position for the fetal heart rate detection determined at any one time. The gestational age and abdominal circumference corresponding to the optimal position, as well as the gestational age and abdominal circumference at the time of the fetal heart rate detection, are used to construct a correlation sphere model that simulates fetal development between the two fetal heart rate detections; The optimal location and the constructed correlative spheroid model simulating fetal development between the two fetal heart detections determine multiple possible fetal heart locations.

During specific implementation, in the above determination system provided by the embodiment of the present invention, the processor 601 may also be specifically configured to determine the simulation corresponding to any fetal heart rate detection according to the gestational age and abdominal circumference of any fetal heart rate detection. The spheroid radius of the spheroid model of fetal development; according to the gestational age and abdominal circumference during this fetal heart detection, determine the spheroid radius of the spheroid model that simulates fetal development during this fetal heart detection; Gestational age, determine the distance between the sphere centers of the spheroid model that simulates fetal development at any fetal heart rate detection and this fetal heart rate detection; The spheroid radius of the spheroid model, and the distance between the spheroids of the spheroid model that simulates fetal development during any fetal heart rate detection and this fetal heart rate detection, respectively, to construct the two fetal heart rate detections with the same section. Correlation spheroid model for simulating fetal development.

During specific implementation, in the above-mentioned determination system provided by the embodiment of the present invention, the processor 601 may also be specifically configured to determine the sphere radius of the sphere model for simulating fetal development corresponding to any fetal heart rate detection. The spheroid radius of the spheroid model simulating fetal development corresponding to the fetal heart detection, and the distance between the spheroid centers of the spheroid model simulating fetal development corresponding to any fetal heart detection and this fetal heart detection respectively, to determine this time The offset of the position of the fetal heart rate during fetal heart rate detection relative to the best position of fetal heart rate detection determined at any time; taking the best position of fetal heart rate detection determined at any time as the vertex, the determined offset is the radius, and the determined offset is the radius. A fan-shaped area with an apex angle of 90 degrees, and the midpoint of the arc of the fan-shaped area is located just below the best position for fetal heart rate detection determined at any time; the boundary of the fan-shaped area is determined as multiple positions where fetal heartbeats may exist.

During specific implementation, in the above determination system provided by the embodiment of the present invention, the detector 602 may be a microphone array, and is used to simultaneously detect sound signals corresponding to each possible fetal heart position. It may also be a fetal heart rate monitor, which is used to sequentially detect fetal heart signals corresponding to each possible fetal heart position. Wherein, the fetal heart rate instrument may be a traditional Doppler effect ultrasound fetal instrument, or may be the latest passive non-ultrasound fetal instrument, which is not limited herein.

Preferably, in the above-mentioned determination system provided by the embodiment of the present invention, the processor 601 can also be used to filter ambient noise and maternal heartbeat sound in the sound signals corresponding to the position of the fetal heart that may exist simultaneously detected by the microphone array. .

During specific implementation, the above-mentioned determination system provided by the embodiment of the present invention may further include: a fetal heart rate monitor 604, configured to measure the current fetal heart rate detection according to the displayed and determined optimal position for the current fetal heart rate detection Fetal heart rate at the best position. The fetal heart rate monitor may be a traditional Doppler effect ultrasound fetal heart rate monitor, or may be the latest passive non-ultrasound fetal heart rate monitor, which is not limited herein.

During specific implementation, in the above-mentioned determination system provided by the embodiment of the present invention, the processor 601 may also be used to determine the sound with the highest intensity among the sound signals corresponding to each possible fetal heart position detected simultaneously by using the microphone array signal and the sound signal with the smallest intensity; determine the difference between the sound signal with the largest intensity and the sound signal with the smallest intensity as the fetal heart signal; the time difference between two adjacent maximum values determined by squaring the fetal heart signal The reciprocal is determined as the fetal heart rate value at the best position for this fetal heart rate detection.

The above-mentioned method and system for determining the best position for fetal heart rate detection provided by the embodiments of the present invention include: the best position for fetal heart rate detection determined according to any one of the previous fetal heart rate detections recorded and the gestational age and Abdominal circumference, determine and display multiple possible fetal heart positions during this fetal heart detection; detect the signal corresponding to each possible fetal heart position; according to the detected signals corresponding to each possible fetal heart position, the highest intensity signal The corresponding possible fetal heart position is determined as the best position for the current fetal heart detection, and the determined best position for the current fetal heart detection is displayed. Because firstly, based on the best position of fetal heart detection determined in any previous fetal heart detection and the gestational age and abdominal circumference of this fetal heart detection, it is determined that there are multiple possible fetal heart positions in this fetal heart detection, and then The best position of the fetal heart rate detection is determined from multiple possible fetal heart positions, and the determined best position of the fetal heart rate detection is displayed. Therefore, it is realized to help the user to quickly and accurately determine the best fetal heart rate detection position. Location.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (16)

1. a determination method of fetal heart detection optimum position, is characterized in that, comprises: According to the best position of fetal heart detection determined in any of the previous fetal heartbeat detections and the gestational age and abdominal circumference of this fetal heartbeat detection, determine and display a number of possible fetal heart positions during this fetal heartbeat detection; include: According to the best position for fetal heart rate detection determined at any one time in the previous fetal heart rate detection, the gestational age and abdominal circumference corresponding to the best position for fetal heart rate detection determined at any one time, and the gestational age and abdominal circumference during the current fetal heart rate detection , to build a correlation spheroid model that simulates fetal development between two fetal heart tests; Determine a plurality of possible fetal heart positions according to the optimal position of fetal heart detection determined at any one time and the constructed correlation spheroid model simulating fetal development between the two fetal heart detections; Detecting the signal corresponding to each of the possible fetal heart positions; According to the detected signals corresponding to the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the highest intensity is determined as the best position for this fetal heart detection, and the determined fetal heart detection is displayed. Best location. 2. The determination method as claimed in claim 1, wherein, according to the best position of fetal heartbeat detection determined at any time in previous fetal heartbeat detections, the pregnancy corresponding to the best position of fetal heartbeat detection determined at any time week and abdominal circumference, as well as the gestational week and abdominal circumference at the time of this fetal heart rate detection, to build a correlation spheroid model that simulates fetal development between the two fetal heart rate detections, including: According to the gestational age and abdominal circumference during any one fetal heart detection, determine the spherical radius of the spheroid model corresponding to the simulated fetal development during any one fetal heart detection; According to the gestational age and abdominal circumference during this fetal heart detection, determine the sphere radius of the sphere model corresponding to the simulated fetal development during this fetal heart detection; According to the gestational age during the two fetal heartbeat detections, determine the distance between the spherical centers of the spherical model simulating fetal development corresponding to the fetal heartbeat detection at any one time and the fetal heart detection at this time; According to the determined sphere radius of the spheroid model simulating fetal development corresponding to the two fetal heart detections, and the spheres of the spheroid model simulating fetal development respectively corresponding to any one fetal heart detection and this fetal heart detection The distance between the hearts is used to construct a correlative spheroid model that simulates fetal development between the two fetal heart detections with the same section. 3. determination method as claimed in claim 2 is characterized in that, described according to described any determination of fetal heart rate detection optimal position, and the simulation fetal development between described two fetal heart rate detections constructed. Correlate the sphere model to determine multiple possible fetal heart locations, including: According to the determined spheroid radius of the spheroid model for simulating fetal development during any one time of fetal heart detection, the spheroid radius of the spheroid model for simulating fetal development during the current fetal heart detection, and The distance between the spherical centers of the spheroid model that simulates fetal development at the time of the fetal heart rate detection and the fetal heart rate detection time respectively, and the fetal heart rate position during this fetal heart rate detection is determined relative to the optimal position of the fetal heart rate detection determined in any one time. the offset of ; Taking the determined optimal position of fetal heart rate detection as the vertex, the determined offset is the radius, and the vertex angle is determined to be a fan-shaped area of 90 degrees, and the midpoint of the arc of the fan-shaped area is located at Right below the best position for fetal heart rate detection determined at any one time; The sector-shaped area boundary is determined as a plurality of positions where the fetal heart may exist. 4. The determination method according to claim 1, wherein the detecting each of the possible signals corresponding to the position of the fetal heart comprises: A microphone array is used to simultaneously detect the sound signal corresponding to each of the possible fetal heart positions. 5. The determination method according to claim 4, wherein, according to the detected signals corresponding to each of the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the greatest intensity is determined as the current fetal heart rate Before detecting the best position, also include: Filter the ambient noise and maternal heartbeat sound in each of the sound signals corresponding to the position of the fetal heart that are detected simultaneously by the microphone array. 6. The determination method according to claim 1, wherein the detecting each of the possible signals corresponding to the position of the fetal heart comprises: The fetal heart rate signal corresponding to each of the possible fetal heart positions is sequentially detected by the fetal heart rate instrument. 7. The determination method according to any one of claims 1-6, characterized in that, further comprising: According to the displayed and determined optimal position of the current fetal heart rate detection, a fetal heart rate instrument is used to measure the fetal heart rate value of the current fetal heart rate detection optimal position. 8. determination method as claimed in claim 4 or 5, is characterized in that, also comprises: Among the sound signals corresponding to each of the possible fetal heart positions detected simultaneously by the microphone array, determine the sound signal with the largest intensity and the sound signal with the smallest intensity; Determining the difference between the sound signal with the highest intensity and the sound signal with the smallest intensity as the fetal heart signal; The reciprocal of the time difference between two adjacent maximum values determined after the square of the fetal heart rate signal is determined as the fetal heart rate value at the optimal position of the current fetal heart rate detection. 9. A determination system for the best position of fetal heart rate detection, characterized in that, comprising: The processor is configured to determine a plurality of possible fetal heart positions during this detection according to the best position for fetal heart detection determined at any one of the recorded previous fetal heart detections and the gestational age and abdominal circumference during the current fetal heart detection; According to the detected signals corresponding to each of the possible fetal heart positions, the possible fetal heart position corresponding to the signal with the highest intensity is determined as the best position for this fetal heart detection; The processor is specifically configured to detect the best position of the fetal heartbeat according to any one of the previous fetal heartbeat detections, the gestational age and abdominal circumference corresponding to the best position of the fetal heartbeat detection determined at any one time, and the fetal heart rate of this time. The gestational age and abdominal circumference at the time of detection, build a correlation spheroid model simulating fetal development between two fetal heartbeat detections; according to the best position of fetal heartbeat detection determined at any one time, and the constructed two fetal heartbeats Detect the correlation between spheroid models that simulate fetal development, and determine multiple possible fetal heart locations; a detector, used for detecting the signal corresponding to each of the possible fetal heart positions; The display is used for displaying a plurality of possible fetal heart positions during the current detection, and displaying the determined optimal position for the current fetal heart detection. 10 . The determination system according to claim 9 , wherein the processor is specifically configured to determine the simulation corresponding to any fetal heart rate detection according to the gestational age and abdominal circumference of any fetal heart rate detection. 11 . The spheroid radius of the spheroid model of fetal development; according to the gestational age and abdominal circumference during this fetal heart detection, determine the spheroid radius of the spheroid model that simulates fetal development during this fetal heart detection; Gestational age, determine the distance between the spherical centers of the spheroid model simulating fetal development corresponding to the fetal heart rate detection at any one time and this fetal heart rate detection; The spheroid radius of the spheroid model of fetal development, and the distance between the spheroid centers of the spheroid model simulating fetal development corresponding to any one of the fetal heart detection and the current fetal heart detection, respectively, to construct the An associative spheroid model simulating fetal development between two fetal heart rate measurements. 11 . The determination system according to claim 10 , wherein the processor is specifically configured to, according to the determined sphere radius of the sphere model simulating fetal development corresponding to any one fetal heart detection, this time. 11 . The spheroid radius of the spheroid model that simulates fetal development corresponding to the fetal heart detection, and the distance between the sphere centers of the spheroid model that simulates fetal development corresponding to any one of the fetal heart detections and the current fetal heart detection, respectively, determine The offset of the position of the fetal heart rate during the current fetal heart rate detection relative to the optimal position of the fetal heart rate detection determined at any time; taking the optimal fetal heart rate detection position determined at any time as the vertex, all determined The offset is the radius, and it is determined that the apex angle is a fan-shaped area of 90 degrees, and the midpoint of the arc of the fan-shaped area is located just below the optimal position of the fetal heartbeat detection determined at any time; the fan-shaped area is The boundaries are identified as multiple locations where the fetal heart may be present. 12 . The determination system according to claim 9 , wherein the detector is a microphone array, which is used to simultaneously detect the sound signals corresponding to the positions where the fetal heart may exist. 13 . 13 . The determination system according to claim 12 , wherein the processor is further configured to filter ambient noise and maternal body in the sound signals corresponding to the possible fetal heart positions detected simultaneously by using a microphone array. 14 . Heartbeat sound. 14 . The determination system according to claim 9 , wherein the detector is a fetal heart rate monitor, which is used to sequentially detect the fetal heart signal corresponding to each of the possible fetal heart positions. 15 . 15. The determination system according to any one of claims 9-14, characterized in that, further comprising: a fetal heart rate meter, used for measuring the optimal position of the current fetal heart rate detection according to the displayed determined optimal position. Describe the fetal heart rate value at the best position for this fetal heart rate detection. 16. The determination system according to claim 12 or 13, wherein the processor is further configured to determine the intensity of the sound signals corresponding to each of the possible fetal heart positions detected simultaneously by using the microphone array The largest sound signal and the sound signal with the smallest intensity; the difference between the sound signal with the largest intensity and the sound signal with the smallest intensity is determined as the fetal heart signal; the two phases determined after the square of the fetal heart signal are determined. The reciprocal of the time difference between adjacent maxima is determined as the fetal heart rate value at the optimal position of the current fetal heart rate detection.

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