CN113679352A - Device and method for acquiring fetal movement of pregnant woman by non-contact micro-motion sensor - Google Patents
Device and method for acquiring fetal movement of pregnant woman by non-contact micro-motion sensor Download PDFInfo
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Abstract
The invention discloses a device and a method for acquiring fetal movement of a pregnant woman by a non-contact micro sensor, which are applied to the technical field of human body physiological signal acquisition. The invention adopts the micro-motion sensing measuring device arranged in the cushion body, thereby avoiding direct contact with the skin of the pregnant woman and improving the comfort level of the pregnant woman in the measuring process; the fetal movement generating position and the fetal movement generating time are calculated and obtained in a multipoint asynchronous mode, so that fetal movement measurement is more accurate, and the obtained data can be used for subsequent medical reference and has higher value.
Description
Technical Field
The invention relates to the technical field of human body physiological signal acquisition, in particular to a device and a method for acquiring fetal movement of a pregnant woman by a non-contact micro-motion sensor.
Background
Fetal movement, uterine contraction and fetal heart rate are important physiological parameters for observing the condition of a fetus in a pregnant period of a woman, wherein the fetal movement refers to the movement of the fetus in the uterus, the uterine contraction refers to the pressure generated by the uterine contraction, and the fetal heart rate refers to the heart rate of the fetus. Fetal movement is the earliest and easiest signal to detect, and is the method most often recommended by clinicians to allow pregnant women to autonomously observe whether the fetus is healthy.
The prior art includes: a self-measuring fetal movement mode of a pregnant woman, a single-channel measuring device and a multi-channel measuring device. Among these, pregnant women have a rather tedious pattern of self-measuring fetal movements, e.g. when the number of days of pregnancy reaches 8, there are at least 1 fetal movement every 13 minutes, an average of about 200 fetal movements every 12 hours at 20 weeks and an average of about 575 fetal movements every 12 hours at 32 weeks. The counting mode is not easy for the pregnant women, is easily influenced by subjectivity, and is difficult to implement every day after long-time calculation; the single-channel measuring device is not designed with multi-point measurement, and an electrode patch is required to be attached to the skin of a pregnant woman to detect an electromyographic signal, so that the pregnant woman is easy to feel uncomfortable when wearing the single-channel measuring device, is easy to interfere, and cannot judge the position of fetal movement every time; the multi-channel measuring device still uses the patch electrode to be attached to the skin of the pregnant woman to detect the electromyographic signal, so that the situation that the pregnant woman is easy to feel uncomfortable and is easy to be interfered and the like still exists in the use process.
Therefore, according to the difficulties in the prior art, the device and the method for acquiring the fetal movement of the pregnant woman by the non-contact micro-motion sensor are provided, so that multi-point measurement and non-contact measurement are realized, the comfort degree of the pregnant woman in the measurement process is improved, and the accuracy of the measurement result is ensured.
Disclosure of Invention
In view of the above, the present invention provides a device and a method for acquiring fetal movement of a pregnant woman by a non-contact micro-motion sensor, which can measure fetal movement in a non-contact manner and obtain the position of the fetal movement by matching with a multi-point asynchronous manner.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for acquiring fetal movement of a pregnant woman with a non-contact micro-motion sensor, comprising:
the system comprises a cushion body, a micro-motion sensing acquisition module, a signal preprocessing module, a signal transmission module, a central processing unit and terminal equipment;
the micro-motion sensing module is arranged in the cushion body;
the micro-motion sensing module is connected with the input end of the signal preprocessing module and is used for collecting a body position change signal of a pregnant woman and sending the body position change signal to the signal preprocessing module;
the signal preprocessing module is connected with the input end of the signal transmission module and used for amplifying and filtering the body position change signal to obtain a preprocessed body position change signal and sending the preprocessed body position change signal to the central processing unit;
the central processing unit receives the preprocessed body position change signal and analyzes and processes the body position change signal to obtain a fetal movement signal of the pregnant woman;
the terminal equipment is connected with the first output end of the central processing unit and used for displaying the information of the fetal movement signal of the pregnant woman.
Optionally, the micro-motion sensing acquisition module comprises a plurality of micro-motion sensing devices, and the micro-motion sensing devices are uniformly distributed on the pad body corresponding to the waist/abdomen of the pregnant woman.
The technical effect realized by the technical scheme is as follows: the local position distribution sets up the measuring point, improves measurement accuracy.
Optionally, the signal preprocessing module includes a signal amplifying unit and a signal filtering unit, which are connected in sequence;
the signal amplification unit is connected with the input port of the signal preprocessing module and is used for amplifying the received body position change signal;
the signal filtering unit is connected with an output port of the signal preprocessing module and is used for filtering the amplified body position change signal to obtain the preprocessed body position change signal.
The technical effect realized by the technical scheme is as follows: the intensity of the collected signals is enhanced, and the purity of the collected signals is improved.
Optionally, the central processing unit includes: the system comprises a correlation rejection unit, a fetal movement signal extraction unit, a fetal movement size calculation unit, a fetal movement position calculation unit and a fetal movement signal counting unit;
the correlation eliminating unit is connected with the input end of the fetal movement signal extracting unit and used for eliminating the correlation among the preprocessed body position change signals by using a principal component analysis method, only the most principal component of CSI change is reserved, and the information principal component of the preprocessed body position change signals is obtained;
the fetal movement signal extraction unit is used for extracting a pregnant fetal movement signal from the received information main component;
the fetal movement size calculating unit is connected with the first output end of the fetal movement signal extracting unit and is used for calculating the fetal movement size according to the pregnant fetal movement signal;
the fetal movement position calculating unit is connected with the second output end of the fetal movement signal extracting unit and is used for calculating the fetal movement position according to the pregnant fetal movement signal;
the fetal movement signal counting unit is connected with the second output end of the fetal movement signal extracting unit and used for calculating the fetal movement times according to the pregnant fetal movement signal.
The technical effect realized by the technical scheme is as follows: obtaining accurate fetal movement signals of the pregnant woman and the size, position and times of the fetal movement.
Optionally, the pregnant woman fetal movement monitoring system further comprises a cloud server connected with the second output end of the central processing unit and used for storing the information of the pregnant woman fetal movement signals and allowing medical monitoring equipment to download the information of the pregnant woman fetal movement signals from the cloud server.
The technical effect realized by the technical scheme is as follows: the fetal movement condition of the pregnant woman can be judged according to the analysis of the long-term trend data.
A method for acquiring fetal movement of a pregnant woman by a non-contact micro-motion sensor comprises the following steps:
a pregnant woman posture change signal acquisition step: the micro-motion sensing acquisition module acquires a body position change signal of the pregnant woman;
signal preprocessing step: the signal preprocessing module amplifies and filters the received body position change signal to obtain a preprocessed body position change signal;
a data transmission step: transmitting the preprocessed body position change signal to the central processing unit;
and (3) data processing: the central processing unit calculates to obtain a fetal movement signal of the pregnant woman according to the received preprocessed body position change signal;
a display step: the terminal equipment is used for displaying the information of the fetal movement signal of the pregnant woman.
Optionally, in the data transmission step, the transmission of the preprocessed body position change signal is a wired or wireless transmission mode.
Optionally, the data processing step further includes calculating a fetal movement size, a fetal movement position, and a number of fetal movements.
Optionally, before the step of acquiring the posture change signal of the pregnant woman, the pregnant woman lies on the pad body, and the waist/abdomen position corresponds to the position of the micro-motion sensing module in the pad body.
According to the technical scheme, compared with the prior art, the device and the method for acquiring the fetal movement of the pregnant woman by the non-contact micro-motion sensor are provided, the micro-motion sensing and measuring device is arranged in the pad body, so that the direct contact with the skin of the pregnant woman is avoided, and the comfort level of the pregnant woman in the measuring process is improved; the fetal movement generating position and the fetal movement generating time are calculated and obtained in a multipoint asynchronous mode, so that fetal movement measurement is more accurate, and the obtained data can be used for subsequent medical reference and has higher value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of the device for collecting fetal movement of a pregnant woman by a non-contact micro-motion sensor according to the present invention;
FIG. 2 is a schematic view of the micro-motion sensing device according to the present invention;
FIG. 3 is a block diagram of a signal preprocessing module according to the present invention;
FIG. 4 is a block diagram of a CPU according to the present invention;
FIG. 5 is a flow chart of a method for acquiring fetal movement of a pregnant woman by a non-contact micro-motion sensor according to the present invention;
wherein, 1-upper shell, 2-lower shell, 3-support, 4-micro sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention discloses a device for acquiring fetal movement of a pregnant woman by a non-contact micro-sensor, which comprises:
the system comprises a cushion body, a micro-motion sensing acquisition module, a signal preprocessing module, a signal transmission module, a central processing unit and terminal equipment;
the micro-motion sensing module is arranged in the cushion body;
the micro-motion sensing module is connected with the input end of the signal preprocessing module and is used for collecting a body position change signal of the pregnant woman and sending the body position change signal to the signal preprocessing module;
the signal preprocessing module is connected with the input end of the signal transmission module and used for amplifying and filtering the body position change signal to obtain a preprocessed body position change signal and sending the preprocessed body position change signal to the central processing unit;
the central processing unit is used for receiving the preprocessed body position change signals and analyzing and processing the body position change signals to obtain fetal movement signals of the pregnant woman;
and the terminal equipment is connected with the first output end of the central processing unit and is used for displaying the information of the fetal movement signal of the pregnant woman.
In one embodiment, the micro-motion sensing acquisition module comprises a plurality of micro-motion sensing devices, and the micro-motion sensing devices are uniformly distributed on the pad body corresponding to the waist/abdomen position of the pregnant woman.
In one embodiment, referring to fig. 2, a micro-motion sensing device is disclosed, comprising an upper housing 1, a lower housing 2, a support body 3 and a micro-motion sensor 4; go up casing 1 and the relative stromatolite setting of casing 2 down, supporter 3 sets up between last casing 1 and casing 2 down, plays the supporting role, and both ends fixed connection of supporter 3 and the ground of last casing 1 and the top surface of casing 2 down set up in a side direction of supporter 3, and lie in between casing 1 and the casing 2 down for gather the wave vibration signal.
In a specific embodiment, referring to fig. 3, the signal preprocessing module includes a signal amplifying unit and a signal filtering unit connected in sequence;
the signal amplification unit is connected with the input port of the signal preprocessing module and used for amplifying the received body position change signal;
and the signal filtering unit is connected with the output port of the signal preprocessing module and is used for filtering the amplified body position change signal to obtain a preprocessed body position change signal.
In a specific embodiment, a Hampel filter is adopted to filter and denoise the amplified posture change signal, so as to obtain the denoised amplified posture change signal.
In one embodiment, referring to fig. 4, the cpu includes: the system comprises a correlation rejection unit, a fetal movement signal extraction unit, a fetal movement size calculation unit, a fetal movement position calculation unit and a fetal movement signal counting unit;
the correlation eliminating unit is connected with the input end of the fetal movement signal extracting unit and used for eliminating the correlation among the preprocessed body position change signals by using a principal component analysis method and only keeping the most principal component of CSI change to obtain the information principal component of the preprocessed body position change signals;
a fetal movement signal extraction unit for extracting fetal movement signals of the pregnant woman from the received information main component;
the fetal movement size calculating unit is connected with the first output end of the fetal movement signal extracting unit and is used for calculating the fetal movement size according to the fetal movement signal of the pregnant woman;
the fetal movement position calculating unit is connected with the second output end of the fetal movement signal extracting unit and is used for calculating the fetal movement position according to the fetal movement signal of the pregnant woman;
and the fetal movement signal counting unit is connected with the second output end of the fetal movement signal extracting unit and is used for calculating the fetal movement times according to the fetal movement signals of the pregnant woman.
In a specific embodiment, the fetal movement signal extraction unit is used for extracting the fetal movement signals of the pregnant women from the information main components according to the fetal movement characteristics of the pregnant women, and the characteristics comprise time domain characteristics, frequency domain characteristics and nonlinear characteristics;
the formula for calculating fetal movement information is as follows:
wherein V is the transmission speed of the vibration wave; t is0The fetal movement occurrence time; t isnThe time of the vibration wave caused by the change of the body position of the pregnant woman received by each micro-motion sensing and collecting device; n is an integer; x0、Y0、Z0Is a fetal movement position; xn、Yn、ZnThe position of the multi-micro sensing acquisition device;
let T0Formula (1) can be simplified if 1 and V if 0,
in one embodiment, the coordinate values of each of the micro-motion sensing devices in three axes X, Y, Z are equal, and the fetal movement position X can be determined according to the following formula0、Y0、Z0The formula is specifically as follows:
in one embodiment, the magnitude of the fetal movement is further calculated from the fetal movement position using the equation,
wherein A is0The fetal movement is; a. thenIs the amplitude of the dynamic physiological signal; k is a correction coefficient.
In a specific embodiment, the pregnant woman fetal movement monitoring system further comprises a cloud server connected with the second output end of the central processing unit and used for storing the information of the pregnant woman fetal movement signals, and the information of the pregnant woman fetal movement signals can be downloaded from the cloud server by the medical monitoring device.
In a specific embodiment, the terminal equipment comprises a mobile terminal and a non-mobile terminal, wherein the mobile terminal comprises a mobile phone, an ipad and the like, and the non-mobile terminal comprises a computer, a workstation and the like.
Referring to fig. 5, the invention also discloses a method for acquiring fetal movement of a pregnant woman by the non-contact micro-motion sensor, which comprises the following steps:
a pregnant woman posture change signal acquisition step: the micro-motion sensing acquisition module acquires a body position change signal of the pregnant woman;
signal preprocessing step: the signal preprocessing module amplifies and filters the received body position change signal to obtain a preprocessed body position change signal;
a data transmission step: transmitting the preprocessed body position change signal to a central processing unit;
and (3) data processing: the central processing unit calculates to obtain a fetal movement signal of the pregnant woman according to the received preprocessed body position change signal;
a display step: the terminal equipment is used for displaying the information of the fetal movement signal of the pregnant woman.
In one embodiment, in the data transmission step, the transmission of the preprocessed posture change signal is a wired or wireless transmission mode.
In one embodiment, the data processing step further comprises calculating the fetal movement size, the fetal movement position and the number of fetal movements.
In a specific embodiment, before the step of acquiring the posture change signal of the pregnant woman, the pregnant woman lies on the pad body, and the waist/abdomen position corresponds to the position of the micro-motion sensing module in the pad body.
In another embodiment, the fetal movement signal information is transmitted to the cloud server, the fetal movement signal information can be downloaded from the cloud server, and the fetal movement condition of the pregnant woman can be judged according to the analysis of the long-term trend data.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention in a progressive manner. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A device for acquiring fetal movement of a pregnant woman by a non-contact micro-motion sensor is characterized by comprising:
the system comprises a cushion body, a micro-motion sensing acquisition module, a signal preprocessing module, a signal transmission module, a central processing unit and terminal equipment;
the micro-motion sensing module is arranged in the cushion body;
the micro-motion sensing module is connected with the input end of the signal preprocessing module and is used for collecting a body position change signal of a pregnant woman and sending the body position change signal to the signal preprocessing module;
the signal preprocessing module is connected with the input end of the signal transmission module and used for amplifying and filtering the body position change signal to obtain a preprocessed body position change signal and sending the preprocessed body position change signal to the central processing unit;
the central processing unit receives the preprocessed body position change signal and analyzes and processes the body position change signal to obtain a fetal movement signal of the pregnant woman;
the terminal equipment is connected with the first output end of the central processing unit and used for displaying the information of the fetal movement signal of the pregnant woman.
2. The device for acquiring fetal movements of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 1,
the micro-motion sensing acquisition module comprises a plurality of micro-motion sensing devices, and the micro-motion sensing devices are uniformly distributed on the pad body corresponding to the waist/abdomen of the pregnant woman.
3. The device for acquiring fetal movements of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 1,
the signal preprocessing module comprises a signal amplifying unit and a signal filtering unit which are sequentially connected;
the signal amplification unit is connected with the input port of the signal preprocessing module and is used for amplifying the received body position change signal;
the signal filtering unit is connected with an output port of the signal preprocessing module and is used for filtering the amplified body position change signal to obtain the preprocessed body position change signal.
4. The device for acquiring fetal movements of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 1,
the central processing unit includes: the system comprises a correlation rejection unit, a fetal movement signal extraction unit, a fetal movement size calculation unit, a fetal movement position calculation unit and a fetal movement signal counting unit;
the correlation eliminating unit is connected with the input end of the fetal movement signal extracting unit and used for eliminating the correlation among the preprocessed body position change signals by using a principal component analysis method, only the most principal component of CSI change is reserved, and the information principal component of the preprocessed body position change signals is obtained;
the fetal movement signal extraction unit is used for extracting a pregnant fetal movement signal from the received information main component;
the fetal movement size calculating unit is connected with the first output end of the fetal movement signal extracting unit and is used for calculating the fetal movement size according to the pregnant fetal movement signal;
the fetal movement position calculating unit is connected with the second output end of the fetal movement signal extracting unit and is used for calculating the fetal movement position according to the pregnant fetal movement signal;
the fetal movement signal counting unit is connected with the second output end of the fetal movement signal extracting unit and used for calculating the fetal movement times according to the pregnant fetal movement signal.
5. The device for acquiring fetal movements of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 1,
the cloud server is connected with the second output end of the central processing unit and used for storing the fetal movement signal information for the medical monitoring equipment to download the fetal movement signal information from the cloud server.
6. A method for acquiring fetal movement of an pregnant woman by using a non-contact micro-motion sensor, which is characterized in that the device for acquiring fetal movement of the pregnant woman by using the non-contact micro-motion sensor as claimed in any one of claims 1-5 comprises the following steps:
a pregnant woman posture change signal acquisition step: the micro-motion sensing acquisition module acquires a body position change signal of the pregnant woman;
signal preprocessing step: the signal preprocessing module amplifies and filters the received body position change signal to obtain a preprocessed body position change signal;
a data transmission step: transmitting the preprocessed body position change signal to the central processing unit;
and (3) data processing: the central processing unit calculates to obtain a fetal movement signal of the pregnant woman according to the received preprocessed body position change signal;
a display step: the terminal equipment is used for displaying the information of the fetal movement signal of the pregnant woman.
7. The method for acquiring fetal movement of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 6,
in the data transmission step, the transmission of the preprocessed body position change signal is in a wired or wireless transmission mode.
8. The method for acquiring fetal movement of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 6,
the data processing step further comprises calculating the size of fetal movement, the position of fetal movement and the number of fetal movements.
9. The method for acquiring fetal movement of a pregnant woman with the non-contact micro-motion sensor as claimed in claim 6,
before the step of acquiring the posture change signal of the pregnant woman, the pregnant woman lies on the pad body, and the waist/abdomen position corresponds to the position of the micro-motion sensing module in the pad body.
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|---|---|---|---|---|
| CN114366082A (en) * | 2021-12-29 | 2022-04-19 | 华南理工大学 | Non-invasive fetal movement signal acquisition and processing method, system, device and medium |
| CN114366082B (en) * | 2021-12-29 | 2024-06-04 | 华南理工大学 | Non-invasive fetal movement signal acquisition and processing method, system, device and medium |
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