CN111466917A - Multi-point type fetal movement monitoring method and device - Google Patents
Multi-point type fetal movement monitoring method and device Download PDFInfo
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- CN111466917A CN111466917A CN202010286358.0A CN202010286358A CN111466917A CN 111466917 A CN111466917 A CN 111466917A CN 202010286358 A CN202010286358 A CN 202010286358A CN 111466917 A CN111466917 A CN 111466917A
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Abstract
The invention relates to a multipoint fetal movement monitoring method and a fetal movement monitoring device, which specifically comprise the following steps: 1) fixing equipment; 2) acquiring a blood oxygen signal by a photoelectric sensor; 3) judging Vmax ' and Vmin ' and Tmax ' and Tmin ' in each change period of each sensor, and calculating T '; 4) in the jth period of the f sensor, if Vjfmax ' > Hf1, or Vjfmin ' < Hf2, or Tjf ' is out of Hf 3-Hf 4, judging that 1-time blood oxygen disorder occurs in the jth change period of the f sensor; 5) the blood oxygen disorder occurs in the jth period of any sensor, the duration time of the blood oxygen disorder is more than 0.3s, and the occurrence of 1 fetal movement is judged; 6) if the interval of the fetal movements of the adjacent 2 times is less than 3min, the effective fetal movement count is 1 time; if the interval of the fetal movements of the adjacent 2 times is more than or equal to 3min, the effective fetal movement count is 2 times; the fetal movement monitoring device is simple in structure, convenient to operate and suitable for pregnant women to monitor fetal movements at home.
Description
Technical Field
The invention belongs to a measuring device, and particularly relates to a multi-point fetal movement monitoring method and a fetal movement monitoring device.
Background
At present, a pregnant woman starts to feel fetal movement at 18-20 weeks, if intrauterine asphyxia exists, fetal movement abnormality can occur in about 3-5 times per hour under normal conditions, the monitoring significance is important in the middle and late gestation, namely, the fetal movement frequency in 28-40 weeks of gestation is more than 30 times in 12 hours, the fetal condition is reflected well, if 30 times are available, the fact that the fetus is lack of oxygen indoors and needs to be treated in time is shown, the fetal movement counting method generally means that the pregnant woman feels the fetal movement frequency, the monitoring is unreliable, a fetal heart fetal movement monitor is generally large equipment in a hospital, needs to be operated by professional medical staff, is difficult to monitor at home, is expensive, and cannot achieve one monitoring for each household.
Therefore, there is a need to develop a fetal movement monitor and a fetal movement monitoring method which have simple structure, convenient operation and low cost and are suitable for monitoring pregnant women at home.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multi-point fetal movement monitoring method and a fetal movement monitoring device, which have simple structure and convenient operation and are suitable for pregnant women to monitor fetal movement at home.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the first technical scheme is as follows:
a multipoint fetal activity monitoring method comprises the following steps:
step one, fixing equipment: the intelligent abdominal belt is bound on the waist, the photoelectric sensors are aligned to the abdomen, and then the Bluetooth functions of the intelligent binding belt and the mobile terminal are started, so that the intelligent binding belt and the mobile terminal are in communication connection after successful searching and pairing;
step two, monitoring the blood oxygen concentration in real time; a user clicks a fetal movement monitoring button on a mobile terminal to start a monitoring mode, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and acquire real-time blood oxygen signals at a sampling frequency set by the monitoring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors acquire the real-time blood oxygen signals at the same sampling time point; then, performing AD conversion on the real-time blood oxygen signals acquired by each optical end sensor to obtain real-time blood oxygen concentration, and sending the real-time blood oxygen concentration to the mobile terminal through Bluetooth;
step three, according to the real-time blood oxygen concentration data, counting the effective fetal movement:
the mobile terminal analyzes and calculates the received real-time blood oxygen concentration of each photoelectric sensor, obtains the change period of the blood oxygen concentration value on each photoelectric sensor, and judges the peak value difference V 'and the change time difference T' of the blood oxygen concentration change in the change period to obtain the maximum value Vmax 'and the minimum value Vmin' of the blood oxygen concentration in the change period, the time Tmax 'when the blood oxygen concentration is maximum and the time Tmin' when the blood oxygen concentration is minimum;
the number of the photo sensors is set to m,
the maximum value Vjfmax 'and the minimum value Vjfmin' of the blood oxygen concentration of the f photoelectric sensor in the j change period, the time Tjfmax 'when the blood oxygen concentration is maximum and the time Tjfmin' when the blood oxygen concentration is minimum,
the variation time difference Tjf ' of the blood oxygen concentration peak value in the jth variation period of the f-th photoelectric sensor is | Tjfmax ' -Tjfmin ' |;
j is a positive integer, f is a positive integer, and f is less than or equal to m;
sequentially judging the real-time blood oxygen concentration collected by all the photoelectric sensors,
when the maximum value Vjfmax ' of the blood oxygen concentration is less than or equal to the upper threshold value H1, the minimum value Vjfmin ' is less than or equal to the lower threshold value Hf2 and the peak change time difference Tj ' is also within the change time threshold range Hf 3-Hf 4 in the time covered by the jth change period on the fth photoelectric sensor, the blood oxygen monitoring is judged to be normal in the time covered by the jth change period by the fth photoelectric sensor,
when the blood oxygen monitoring of all the photoelectric sensors is normal in the time covered by the jth change cycle, judging that fetal movement does not occur in the time range covered by the jth change cycle;
when the maximum value Vjfmax ' > upper threshold value Hf1, or the minimum value Vjfmin ' < lower threshold value Hf2, or the peak value change time difference Tjf ' of the blood oxygen concentration in the time covered by the jth change period on the fth photoelectric sensor is out of the set change time threshold value range Hf 3-Hf 4, judging that the blood oxygen monitoring disturbance occurs on the fth photoelectric sensor in the time covered by the jth change period;
when the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor, but the duration of the blood oxygen monitoring disorder is less than or equal to 0.3s, it is determined that fetal movement does not occur in the time covered by the jth change cycle
When the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor and the duration of the blood oxygen monitoring disorder is more than 0.3s, judging that 1 fetal movement occurs in the time covered by the jth change cycle;
if the time interval of the adjacent 2 fetal movements is less than 3min, the valid fetal movement is generated for 1 time; if the time interval of the adjacent 2 fetal movements is more than or equal to 3min, the valid fetal movements are generated for 2 times;
step four: counting the effective fetal movement according to the method in the third step until the sampling is finished, namely closing a fetal movement monitoring button; and then the mobile terminal stores the result of the fetal movement monitoring.
Furthermore, the upper threshold H1, the lower threshold H2, and the time threshold range H3 of the peak change in blood oxygen concentration of all photosensors are the same, and are fixed values set in advance, i.e., H1 — H11 — H21 — Hf1 — Hm1 — 95%, and H2 — H12 — H22 — Hf2 — Hm2 — 85%; h3 ═ H13 ═ H23 ═ Hf3 ═ Hm3 ═ 0.6 s; h4, H14, H24, Hf4, Hm4, 1 s; f is a positive integer, and f is less than or equal to m.
Furthermore, the upper threshold Hf1, the lower threshold Hf2 and the time threshold range Hf 3-Hf 4 of peak variation of blood oxygen concentration are variables, and the measurement is carried out before each fetal movement monitoring, and the measurement method of the threshold is as follows:
when no fetal movement occurs, a user clicks a threshold value measuring button on the mobile terminal to start a threshold value measuring mode of the intelligent abdominal belt, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and collect blood oxygen signals according to the sampling frequency and the collection time set by the measuring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors collect real-time blood oxygen signals at the same sampling time point; then, carrying out signal amplification and AD conversion on the blood oxygen signals acquired by the photoelectric sensor to obtain an initial blood oxygen concentration value when fetal movement is not carried out, and sending the initial blood oxygen concentration value to the mobile terminal through Bluetooth;
the mobile terminal analyzes and processes the received initial blood oxygen concentration value of each photoelectric sensor when no fetal movement is performed, obtains the initial change period of the blood oxygen concentration value when no fetal movement is performed and the number n of the initial change periods, and respectively judges the peak value difference V and the peak value time difference T of the blood oxygen concentration change in the n initial change periods to obtain the maximum value Vmax and the minimum value Vmin of the blood oxygen concentration in each initial change period, the time Tmax when the blood oxygen concentration is maximum and the time Tmin when the blood oxygen concentration is minimum, and calculates the time Tmin when each initial change period is minimumPeak time difference T in period, arithmetic mean of peak time difference T in n initial change periods
And SDT; and the arithmetic mean of the maximum values Vmax of the blood oxygen concentration in the n initial variation periods
And SDVmaxArithmetic mean of minimum values of blood oxygen concentration Vmin
And SDVmin；
Setting the maximum value Vifmax and the minimum value Vifmin of the blood oxygen concentration, the time Tifmax when the blood oxygen concentration is maximum and the time Tifmin when the blood oxygen concentration is minimum of the f photoelectric sensor in the ith initial change period;
the peak time difference Tif of the blood oxygen concentration of the f-th photoelectric sensor in the i-th initial change period is | Tifmax-Tifmin |;
arithmetic mean of peak time differences Ti of blood oxygen concentration in n initial variation period of the f-th photoelectric sensor
Standard deviation SDTf：
Arithmetic mean of maximum blood oxygen concentration Vfmax over n initial variation periods of the f-th photosensor
Standard deviation SDVfmax：
Arithmetic mean of minimum of blood oxygen concentration Vfmin during n initial variation period of f-th photoelectric sensor
Standard deviation SDVfmin：
Wherein i is a positive integer, and i is not more than n;
then, the upper limit Hf1 of the blood oxygen concentration threshold of the f-th photosensor is
The lower threshold Hf2 of the f-th photosensor is
The peak time threshold range Hf 3-Hf 4 of the variation of blood oxygen concentration is
Finally, the mobile terminal stores the obtained upper threshold Hf1, lower threshold Hf2 and peak time threshold range Hf 3-Hf 4 of blood oxygen concentration change, and updates historical threshold data.
Further, the sampling frequency set in the measurement mode is the same as the sampling frequency set in the monitoring mode.
The second technical scheme is as follows:
a fetal movement monitoring device comprises an intelligent abdominal belt and a mobile terminal connected with the intelligent abdominal belt through Bluetooth;
the intelligent abdominal belt comprises an abdominal belt body, wherein a photoelectric sensor module for monitoring and acquiring blood oxygen signals and a micro control unit connected with the photoelectric sensor module are arranged on the abdominal belt body, the photoelectric sensor module comprises a plurality of photoelectric sensors arranged in an array manner, and the photoelectric sensors are respectively connected with the micro control unit; the micro control unit comprises a belly band MCU, an AD conversion module for converting analog blood oxygen signals monitored by the photoelectric sensor module into digital blood oxygen signals, and a spectrum analysis module for calculating blood oxygen concentration by analyzing the digital blood oxygen signals, wherein the belly band MCU is connected with a Bluetooth module I for realizing communication linkage with the mobile terminal;
the mobile terminal comprises a shell and a fetal movement monitoring button arranged on the shell; set up in the casing and be used for judging whether take place the terminal MCU of fetal movement through the real-time blood oxygen concentration data of analysis, terminal MCU is connected with the display module who is used for display time and monitoring result respectively for the storage module of storage monitoring result, be used for with the bluetooth module II of communication linkage is realized to intelligence binder.
Further, the display module comprises a display screen, and the display screen is arranged on the shell.
The reflection type blood oxygen sensor is SI1171 of Silicon L abs, and 2L ED and PD are integrated on SI1171 of Silicon L abs.
Furthermore, thread gluing is arranged at two ends of the abdominal belt body, and a power switch button is arranged on the shell.
Furthermore, still be provided with a plurality of lights on the binder body, it is a plurality of the light is followed photoelectric sensor circumference evenly distributed.
Further, a threshold value measuring button is further arranged on the shell of the mobile terminal, and the terminal MCU is further used for calculating a change threshold value range of blood oxygen concentration and a change time threshold value range of blood oxygen concentration by analyzing initial real-time blood oxygen concentration data measured during non-fetal movement.
Compared with the prior art, the invention has the following beneficial effects:
1. the method for testing the blood oxygen concentration by sampling is beneficial to fetal movement monitoring on the principle that the blood oxygen concentration is easily interfered by muscle movement and visible light to cause deviation of the measurement result during testing; when fetal movement occurs to a fetus, abdominal muscles jump, gaps are generated between the photoelectric sensors and the skin, and therefore the influence of visible light is received, noise of blood oxygen test is increased, the blood oxygen test is interfered, blood oxygen monitoring is disordered, blood oxygen data are deviated, when the blood oxygen data exceed a set range, fetal movement is generated, when the occurrence of fetal movement reaches a preset condition, effective fetal movement is considered to occur, and effective fetal movement counting is carried out.
2. The invention sets the duration time of blood oxygen monitoring disorder to be more than 0.3s, and considers that 1 fetal movement occurs, thereby effectively eliminating the blood oxygen monitoring disorder caused by the interference of other non-fetal movement factors during the blood oxygen test.
3. The illuminating lamps are arranged around the photoelectric sensor, so that the intensity of visible light is further increased, and the interference of the visible light on blood oxygen monitoring is enhanced.
4. The threshold value setting sampling variable mode of the invention selects the time without fetal movement to carry out normal blood oxygen monitoring before carrying out fetal movement monitoring, measures the characteristic parameters of blood oxygen when fetal movement does not occur, and sets the threshold value of the blood oxygen parameter when fetal movement occurs, thereby ensuring that the judgment result of fetal movement is more accurate.
5. The invention has a plurality of photoelectric sensors, a multi-point monitoring mode is formed by a sampling matrix arrangement mode, and because the position of the fetus is not fixed when the fetus moves, the monitoring missing phenomenon is easy to occur when the fetal movement position is far away from the photoelectric sensors, the multi-point monitoring mode is adopted, the monitoring area is larger, and the result is more accurate.
The fetal movement monitoring device is simple in structure, convenient to operate and suitable for pregnant women to monitor fetal movements at home.
Drawings
FIG. 1 is a flow chart of one embodiment of a fetal activity monitoring method of the present invention;
FIG. 2 is a system block diagram of one embodiment of the fetal activity monitoring apparatus of the present invention;
FIG. 3 is a schematic diagram of an intelligent abdominal belt in an embodiment of the fetal activity monitoring apparatus of the present invention;
fig. 4 is a schematic structural diagram of a mobile terminal in an embodiment of the fetal movement monitoring apparatus of the present invention;
fig. 5 is a schematic structural diagram of a mobile terminal in another embodiment of the fetal movement monitoring apparatus according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
One embodiment of a multi-point fetal activity monitoring method, as shown in FIG. 1, includes the steps of:
step one, fixing equipment: the intelligent abdominal belt is bound on the waist, the photoelectric sensors are aligned to the abdomen, and then the Bluetooth functions of the intelligent binding belt and the mobile terminal are started, so that the intelligent binding belt and the mobile terminal are in communication connection after successful searching and pairing;
step two, monitoring the blood oxygen concentration in real time; a user clicks a fetal movement monitoring button on a mobile terminal to start a monitoring mode, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and acquire real-time blood oxygen signals at a sampling frequency set by the monitoring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors acquire the real-time blood oxygen signals at the same sampling time point; then, performing AD conversion on the real-time blood oxygen signals acquired by each optical end sensor to obtain real-time blood oxygen concentration, and sending the real-time blood oxygen concentration to the mobile terminal through Bluetooth;
step three, according to the real-time blood oxygen concentration data, counting the effective fetal movement:
the mobile terminal analyzes and calculates the received real-time blood oxygen concentration of each photoelectric sensor, obtains the change period of the blood oxygen concentration value on each photoelectric sensor, and judges the peak value difference V 'and the change time difference T' of the blood oxygen concentration change in the change period to obtain the maximum value Vmax 'and the minimum value Vmin' of the blood oxygen concentration in the change period, the time Tmax 'when the blood oxygen concentration is maximum and the time Tmin' when the blood oxygen concentration is minimum;
the number of the photo sensors is set to m,
the maximum value Vjfmax 'and the minimum value Vjfmin' of the blood oxygen concentration of the f photoelectric sensor in the j change period, the time Tjfmax 'when the blood oxygen concentration is maximum and the time Tjfmin' when the blood oxygen concentration is minimum,
the variation time difference Tjf ' of the blood oxygen concentration peak value in the jth variation period of the f-th photoelectric sensor is | Tjfmax ' -Tjfmin ' |;
j is a positive integer, f is a positive integer, and f is less than or equal to m;
sequentially judging the real-time blood oxygen concentration collected by all the photoelectric sensors,
when the maximum value Vjfmax ' of the blood oxygen concentration is less than or equal to the upper threshold value Hf1, the minimum value Vjfmin ' is less than or equal to the lower threshold value Hf2, and the peak change time difference Tjf ' is within the change time threshold range Hf 3-Hf 4 in the time covered by the jth change period on the fth photoelectric sensor, the blood oxygen monitoring is judged to be normal in the time covered by the jth change period by the fth photoelectric sensor,
when the blood oxygen monitoring of all the photoelectric sensors is normal in the time covered by the jth change cycle, judging that fetal movement does not occur in the time range covered by the jth change cycle;
when the maximum value Vjfmax ' > upper threshold value Hf1, or the minimum value Vjfmin ' < lower threshold value Hf2, or the peak value change time difference Tjf ' of the blood oxygen concentration in the time covered by the jth change period on the fth photoelectric sensor is out of the set change time threshold value range Hf 3-Hf 4, judging that the blood oxygen monitoring disturbance occurs on the fth photoelectric sensor in the time covered by the jth change period;
when the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor, but the duration of the blood oxygen monitoring disorder is less than or equal to 0.3s, it is determined that fetal movement does not occur in the time covered by the jth change cycle
When the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor and the duration of the blood oxygen monitoring disorder is more than 0.3s, judging that 1 fetal movement occurs in the time covered by the jth change cycle;
if the time interval of the adjacent 2 fetal movements is less than 3min, the valid fetal movement is generated for 1 time; if the time interval of the adjacent 2 fetal movements is more than or equal to 3min, the valid fetal movements are generated for 2 times;
step four: counting the effective fetal movement according to the method in the third step until the sampling is finished, namely closing a fetal movement monitoring button; and then the mobile terminal stores the result of the fetal movement monitoring.
Furthermore, the upper threshold Hf1 of the blood oxygen concentration of all the photosensors is the same, the lower threshold Hf2 of all the photosensors is the same as the time threshold ranges Hf3 to Hf4 of the peak blood oxygen concentration change, and the ranges Hf1 to Hf4 are fixed values set in advance, and H1 to H11 to H21 to Hf1 to Hm1 to 95% and H2 to H12 to H22 to Hf2 to Hm2 to 85%; h3 ═ H13 ═ H23 ═ Hf3 ═ Hm3 ═ 0.6 s; h4, H14, H24, Hf4, Hm4, 1 s; f is a positive integer, and f is less than or equal to m.
In addition, the upper threshold Hf1, the lower threshold Hf2 and the time threshold range Hf 3-Hf 4 of peak variation of blood oxygen concentration may be variables, and the threshold may be determined before each fetal movement monitoring, and the determination method of the threshold is as follows:
when no fetal movement occurs, a user clicks a threshold value measuring button on the mobile terminal to start a threshold value measuring mode of the intelligent abdominal belt, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and collect blood oxygen signals according to the sampling frequency and the collection time set by the measuring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors collect real-time blood oxygen signals at the same sampling time point; then, carrying out signal amplification and AD conversion on the blood oxygen signals acquired by the photoelectric sensor to obtain an initial blood oxygen concentration value when fetal movement is not carried out, and sending the initial blood oxygen concentration value to the mobile terminal through Bluetooth;
the mobile terminal analyzes the received initial blood oxygen concentration value of each photoelectric sensor when no fetal movement is performed, obtains the initial change period of the blood oxygen concentration value when no fetal movement is performed and the number n of the initial change periods, and respectively judges the peak value difference V and the peak value time difference T of the blood oxygen concentration change in the n initial change periods to obtain the maximum value Vmax and the minimum value Vmin of the blood oxygen concentration in each initial change period, the time Tmax when the blood oxygen concentration is maximum and the time Tmin when the blood oxygen concentration is minimum, and calculates the arithmetic mean value of the peak value time difference T in each initial change period and the peak value time difference T in the n initial change periods
And SDT; and the arithmetic mean of the maximum values Vmax of the blood oxygen concentration in the n initial variation periods
And SDVmaxArithmetic mean of minimum values of blood oxygen concentration Vmin
And SDVmin；
Setting the maximum value Vifmax and the minimum value Vifmin of the blood oxygen concentration, the time Tifmax when the blood oxygen concentration is maximum and the time Tifmin when the blood oxygen concentration is minimum of the f photoelectric sensor in the ith initial change period;
the peak time difference Tif of the blood oxygen concentration of the f-th photoelectric sensor in the i-th initial change period is | Tifmax-Tifmin |;
arithmetic mean of peak time differences Ti of blood oxygen concentration in n initial variation period of the f-th photoelectric sensor
Standard deviationDifference SDTf：
Arithmetic mean of maximum blood oxygen concentration Vfmax over n initial variation periods of the f-th photosensor
Standard deviation SDVfmax：
Arithmetic mean of minimum of blood oxygen concentration Vfmin during n initial variation period of f-th photoelectric sensor
Standard deviation SDVfmin：
Wherein i is a positive integer, and i is not more than n;
then, the upper limit Hf1 of the blood oxygen concentration threshold of the f-th photosensor is
The lower threshold Hf2 of the f-th photosensor is
The peak time threshold range Hf 3-Hf 4 of the variation of blood oxygen concentration is
Finally, the mobile terminal stores the obtained upper threshold Hf1, lower threshold Hf2 and peak time threshold range Hf 3-Hf 4 of blood oxygen concentration change, and updates historical threshold data.
Further, the sampling frequency set in the measurement mode is the same as the sampling frequency set in the monitoring mode, and the sampling frequency is the same as the sampling frequency in the case of measuring the blood oxygen concentration by a usual photoelectric sensor.
In order to implement the multi-point fetal movement monitoring method, fig. 2-4 show a fetal movement monitoring device, which comprises an intelligent abdominal belt 1 and a mobile terminal 2 connected with the intelligent abdominal belt 1 through bluetooth;
the intelligent abdominal belt 1 comprises an abdominal belt body 11, wherein a photoelectric sensor module 12 for monitoring and acquiring blood oxygen signals and a micro control unit connected with the photoelectric sensor module 12 are arranged on the abdominal belt body 11, the photoelectric sensor module 12 comprises a plurality of photoelectric sensors 19 arranged in an array manner, and the photoelectric sensors 19 are respectively connected with the micro control unit; the micro control unit comprises a belly band MCU13, an AD conversion module 14 for converting analog blood oxygen signals monitored by the photoelectric sensor module 12 into digital blood oxygen signals, and a spectrum analysis module 15 for calculating blood oxygen concentration by analyzing the digital blood oxygen signals, wherein a Bluetooth module I16 for realizing communication linkage with the mobile terminal 2 is connected to the belly band MCU 13;
the mobile terminal 2 comprises a shell 21 and a fetal movement monitoring button 22 arranged on the shell 21; set up in casing 21 and be used for judging whether take place terminal MCU23 of fetal movement through the real-time blood oxygen concentration data of analysis, terminal MCU23 is connected with the display module 24 that is used for display time and monitoring result respectively for storage module 25 of storage monitoring result, be used for with intelligent binder 1 realizes the bluetooth module II 26 of communication linkage.
Further, the display module 24 includes a display screen 27, and the display screen 27 is disposed on the housing 21.
Further, the photoelectric sensor 19 is a reflective blood oxygen sensor, the reflective blood oxygen sensor is SI1171 of Silicon L abs, and 2L EDs and PDs are integrated on the SI1171 of the Silicon L abs.
Furthermore, two ends of the abdominal belt body 11 are provided with fasteners 17, and the housing 21 is provided with a power switch button 28.
Further, still be provided with a plurality of light 18 on the binder body 11, a plurality of light 18 is along 19 circumference evenly distributed of photoelectric sensor.
Further, the method for determining whether fetal movement occurs by analyzing the real-time blood oxygen concentration data by the terminal MCU23 is as follows:
the mobile terminal analyzes and calculates the received real-time blood oxygen concentration of each photoelectric sensor, obtains the change period of the blood oxygen concentration value on each photoelectric sensor, and judges the peak value difference V 'and the change time difference T' of the blood oxygen concentration change in the change period to obtain the maximum value Vmax 'and the minimum value Vmin' of the blood oxygen concentration in the change period, the time Tmax 'when the blood oxygen concentration is maximum and the time Tmin' when the blood oxygen concentration is minimum;
the number of the photo sensors is set to m,
the maximum value Vjfmax 'and the minimum value Vjfmin' of the blood oxygen concentration of the f photoelectric sensor in the j change period, the time Tjfmax 'when the blood oxygen concentration is maximum and the time Tjfmin' when the blood oxygen concentration is minimum,
the variation time difference Tjf ' of the blood oxygen concentration peak value in the jth variation period of the f-th photoelectric sensor is | Tjfmax ' -Tjfmin ' |;
j is a positive integer, f is a positive integer, and f is less than or equal to m;
sequentially judging the real-time blood oxygen concentration collected by all the photoelectric sensors,
when the maximum value Vjfmax ' of the blood oxygen concentration is less than or equal to the upper threshold value H1, the minimum value Vjfmin ' is less than or equal to the lower threshold value Hf2, and the peak change time difference Tjf ' is also within the change time threshold range Hf 3-Hf 4 in the time covered by the jth change period on the fth photoelectric sensor, the blood oxygen monitoring is judged to be normal in the time covered by the jth change period by the fth photoelectric sensor,
when the blood oxygen monitoring of all the photoelectric sensors is normal in the time covered by the jth change cycle, judging that fetal movement does not occur in the time range covered by the jth change cycle;
when the maximum value Vjfmax ' > upper threshold value Hf1, or the minimum value Vjfmin ' < lower threshold value Hf2, or the peak value change time difference Tjf ' of the blood oxygen concentration in the time covered by the jth change period on the fth photoelectric sensor is out of the set change time threshold value range Hf 3-Hf 4, judging that the blood oxygen monitoring disturbance occurs on the fth photoelectric sensor in the time covered by the jth change period;
when the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor, but the duration of the blood oxygen monitoring disorder is less than or equal to 0.3s, it is determined that fetal movement does not occur in the time covered by the jth change cycle
When the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor and the duration of the blood oxygen monitoring disorder is more than 0.3s, judging that 1 fetal movement occurs in the time covered by the jth change cycle;
if the time interval of the adjacent 2 fetal movements is less than 3min, the valid fetal movement is generated for 1 time; if the time interval of the adjacent 2 fetal movements is more than or equal to 3min, the valid fetal movements are generated for 2 times;
as another embodiment of the fetal activity monitoring apparatus of the present invention, as shown in fig. 5, the housing 21 of the mobile terminal 2 is further provided with a threshold value determination button 29, and the terminal MCU23 is further configured to calculate a variation threshold range of blood oxygen concentration and a variation time threshold range of blood oxygen concentration by analyzing the initial real-time blood oxygen concentration data measured during the non-fetal activity.
Further, the method for calculating the peak upper limit, the peak lower limit and the peak change time threshold range of the blood oxygen concentration by analyzing the initial real-time blood oxygen concentration data measured during the non-fetal movement by the terminal MCU comprises:
when no fetal movement occurs, a user clicks a threshold value measuring button on the mobile terminal to start a threshold value measuring mode of the intelligent abdominal belt, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and collect blood oxygen signals according to the sampling frequency and the collection time set by the measuring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors collect real-time blood oxygen signals at the same sampling time point; then, carrying out signal amplification and AD conversion on the blood oxygen signals acquired by the photoelectric sensor to obtain an initial blood oxygen concentration value when fetal movement is not carried out, and sending the initial blood oxygen concentration value to the mobile terminal through Bluetooth;
the mobile terminal analyzes the received initial blood oxygen concentration value of each photoelectric sensor when no fetal movement is performed, obtains the initial change period of the blood oxygen concentration value when no fetal movement is performed and the number n of the initial change periods, and respectively judges the peak value difference V and the peak value time difference T of the blood oxygen concentration change in the n initial change periods to obtain the maximum value Vmax and the minimum value Vmin of the blood oxygen concentration in each initial change period, the time Tmax when the blood oxygen concentration is maximum and the time Tmin when the blood oxygen concentration is minimum, and calculates the arithmetic mean value of the peak value time difference T in each initial change period and the peak value time difference T in the n initial change periods
And SDT; and the arithmetic mean of the maximum values Vmax of the blood oxygen concentration in the n initial variation periods
And SDVmaxArithmetic mean of minimum values of blood oxygen concentration Vmin
And SDVmin；
Setting the maximum value Vifmax and the minimum value Vifmin of the blood oxygen concentration, the time Tifmax when the blood oxygen concentration is maximum and the time Tifmin when the blood oxygen concentration is minimum of the f photoelectric sensor in the ith initial change period;
the peak time difference Tif of the blood oxygen concentration of the f-th photoelectric sensor in the i-th initial change period is | Tifmax-Tifmin |;
arithmetic mean of peak time differences Ti of blood oxygen concentration in n initial variation period of the f-th photoelectric sensor
Standard deviation SDTf：
Arithmetic mean of maximum blood oxygen concentration Vfmax over n initial variation periods of the f-th photosensor
Standard deviation SDVfmax：
Arithmetic mean of minimum of blood oxygen concentration Vfmin during n initial variation period of f-th photoelectric sensor
Standard deviation SDVfmin：
Wherein i is a positive integer, and i is not more than n;
then, the upper limit Hf1 of the blood oxygen concentration threshold of the f-th photosensor is
The lower threshold Hf2 of the f-th photosensor is
The peak time threshold range Hf 3-Hf 4 of the variation of blood oxygen concentration is
Finally, the mobile terminal stores the obtained upper threshold Hf1, lower threshold Hf2 and peak time threshold range Hf 3-Hf 4 of blood oxygen concentration change, and updates historical threshold data.
Further, the sampling frequency set in the measurement mode is the same as the sampling frequency set in the monitoring mode.
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (6)
1. A multipoint fetal activity monitoring method comprising the steps of:
step one, fixing equipment: the intelligent abdominal belt is bound on the waist, the photoelectric sensors are aligned to the abdomen, and then the Bluetooth functions of the intelligent binding belt and the mobile terminal are started, so that the intelligent binding belt and the mobile terminal are in communication connection after successful searching and pairing;
step two, monitoring the blood oxygen concentration in real time; a user clicks a fetal movement monitoring button on a mobile terminal to start a monitoring mode, a plurality of photoelectric sensors on the intelligent abdominal belt monitor and acquire real-time blood oxygen signals at a sampling frequency set by the monitoring mode, the mobile terminal controls the plurality of photoelectric sensors to synchronously operate, and the plurality of photoelectric sensors acquire the real-time blood oxygen signals at the same sampling time point; then, performing AD conversion on the real-time blood oxygen signals acquired by each optical end sensor to obtain real-time blood oxygen concentration, and sending the real-time blood oxygen concentration to the mobile terminal through Bluetooth;
step three, according to the real-time blood oxygen concentration data, counting the effective fetal movement:
the mobile terminal analyzes and calculates the received real-time blood oxygen concentration of each photoelectric sensor, obtains the change period of the blood oxygen concentration value on each photoelectric sensor, and judges the peak value difference V 'and the change time difference T' of the blood oxygen concentration change in the change period to obtain the maximum value Vmax 'and the minimum value Vmin' of the blood oxygen concentration in the change period, the time Tmax 'when the blood oxygen concentration is maximum and the time Tmin' when the blood oxygen concentration is minimum;
the number of the photo sensors is set to m,
the maximum value Vjfmax 'and the minimum value Vjfmin' of the blood oxygen concentration of the f photoelectric sensor in the j change period, the time Tjfmax 'when the blood oxygen concentration is maximum and the time Tjfmin' when the blood oxygen concentration is minimum,
the variation time difference Tjf ' = | Tjfmax ' -Tjfmin ' | of the blood oxygen concentration peak value in the jth variation period of the f-th photoelectric sensor;
j is a positive integer, f is a positive integer, and f is less than or equal to m;
sequentially judging the real-time blood oxygen concentration collected by all the photoelectric sensors,
when the maximum value Vjfmax ' of the blood oxygen concentration is less than or equal to the upper threshold value H1, the minimum value Vjfmin ' is less than or equal to the lower threshold value Hf2, and the peak change time difference Tj ' is also within the change time threshold range Hf 3-Hf 4 in the time covered by the jth change period on the fth photoelectric sensor, the blood oxygen monitoring is judged to be normal in the time covered by the jth change period by the fth photoelectric sensor,
when the blood oxygen monitoring of all the photoelectric sensors is normal in the time covered by the jth change cycle, judging that fetal movement does not occur in the time range covered by the jth change cycle;
when the maximum value Vjfmax ' > upper threshold value Hf1, or the minimum value Vjfmin ' < lower threshold value Hf2, or the peak value change time difference Tjf ' of the blood oxygen concentration in the time covered by the jth change period on the fth photoelectric sensor is out of the set change time threshold value range Hf 3-Hf 4, judging that the blood oxygen monitoring disturbance occurs on the fth photoelectric sensor in the time covered by the jth change period;
when the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor, but the duration of the blood oxygen monitoring disorder is less than or equal to 0.3s, it is determined that fetal movement does not occur in the time covered by the jth change cycle
When the blood oxygen monitoring disorder occurs in the time covered by the jth change cycle of any one photoelectric sensor and the duration of the blood oxygen monitoring disorder is more than 0.3s, judging that 1 fetal movement occurs in the time covered by the jth change cycle;
if the time interval of the adjacent 2 fetal movements is less than 3min, the valid fetal movement is generated for 1 time; if the time interval of the adjacent 2 fetal movements is more than or equal to 3min, the valid fetal movements are generated for 2 times;
step four: counting the effective fetal movement according to the method in the third step until the sampling is finished, namely closing a fetal movement monitoring button; and then the mobile terminal stores the result of the fetal movement monitoring.
2. The multipoint fetal movement monitoring method according to claim 1, wherein the upper threshold H1 of the blood oxygen concentration of all the photoelectric sensors is the same, the lower threshold H2 of the blood oxygen concentration is the same, and the time threshold range H3 of the peak variation of the blood oxygen concentration is the same, and is a preset fixed value, H1= H11= H21=. = Hf1=. = Hm1=95%, H2= H12= H22=. = Hf2=. = Hm2= 85%; h3= H13= H23= Hf3= Hm3=0.6 s; h4= H14= H24= Hf4= Hm4=1 s; f is a positive integer, and f is less than or equal to m.
3. The fetal movement monitoring device is characterized by comprising an intelligent abdominal belt and a mobile terminal connected with the intelligent abdominal belt through Bluetooth;
the intelligent abdominal belt comprises an abdominal belt body, wherein a photoelectric sensor module for monitoring and acquiring blood oxygen signals and a micro control unit connected with the photoelectric sensor module are arranged on the abdominal belt body, the photoelectric sensor module comprises a plurality of photoelectric sensors arranged in an array manner, and the photoelectric sensors are respectively connected with the micro control unit; the micro control unit comprises a belly band MCU, an AD conversion module for converting analog blood oxygen signals monitored by the photoelectric sensor module into digital blood oxygen signals, and a spectrum analysis module for calculating blood oxygen concentration by analyzing the digital blood oxygen signals, wherein the belly band MCU is connected with a Bluetooth module I for realizing communication linkage with the mobile terminal;
the mobile terminal comprises a shell and a fetal movement monitoring button arranged on the shell; set up in the casing and be used for judging whether take place the terminal MCU of fetal movement through the real-time blood oxygen concentration data of analysis, terminal MCU is connected with the display module who is used for display time and monitoring result respectively for the storage module of storage monitoring result, be used for with the bluetooth module II of communication linkage is realized to intelligence binder.
4. A fetal activity monitoring apparatus as claimed in claim 3 wherein the photoelectric sensor is a reflective oximetry sensor;
the reflective blood oxygen sensor is SI1171 of Silicon L abs, and 2L ED and PD are integrated on SI1171 of Silicon L abs.
5. The fetal movement monitoring device of claim 3, wherein two ends of the abdominal belt body are provided with adhesive buttons, and the shell is provided with a power switch button.
6. The fetal activity monitoring device of claim 3, wherein the abdominal belt body is further provided with a plurality of illuminating lamps, and the illuminating lamps are uniformly distributed along the circumference of the photoelectric sensor.
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| CN112741627A (en) * | 2021-01-29 | 2021-05-04 | 南开大学 | Wrist blood oxygen saturation monitoring method based on multiple filtering |
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| CN109414207A (en) * | 2016-03-21 | 2019-03-01 | 皇家飞利浦有限公司 | Fetal activity monitoring system and method |
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