Wearable intelligent fetal heart monitoring device

Abstract

The invention relates to the field of medical detection equipment, in particular to a wearable intelligent fetal heart monitoring device which comprises a uterine pressure detection belt, a fetal heart detection belt and two fixing belts, the two ends of the uterine pressure detection belt and the two ends of the fetal heart detection belt are connected to the two fixing belts, and the free ends of the two fixing belts are detachably connected. A piezoelectric film is fixed to the inner side face of the uterine pressure detection belt, a fetal heart probe is arranged on the fetal heart detection belt, the piezoelectric film and the fetal heart probe are sequentially connected with a signal amplifier, a filter and an analog-to-digital converter through electrodes, the analog-to-digital converter is electrically connected with a microcontroller, the microcontroller is electrically connected with a communication module, and a battery is arranged on the uterine pressure detection belt. And the battery is used for supplying power to the signal amplifier, the filter, the digital-to-analog converter and the microcontroller. The device is convenient to use, wide in detection range and accurate in detection, and can solve the problem of limited monitoring range in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of medical detection equipment, and in particular to a wearable intelligent fetal heart monitoring device. Background Art

[0002] In modern obstetrics and gynecology, fetal heart rate monitors are crucial medical devices for safeguarding the health of pregnant women and their fetuses. Existing fetal heart rate monitors typically feature a uterine pressure probe and a fetal heart rate probe. The uterine pressure probe monitors uterine contraction pressure by sensing local pressure changes in the pregnant woman's abdomen, while the fetal heart rate probe uses ultrasound Doppler and other technologies to detect the fetal heart rate in real time. For example, the fetal heart rate monitor, published with publication number CN207125739U, uses the uterine pressure probe and fetal heart rate probe to provide basic data for clinical diagnosis, playing a crucial role in assessing the fetal condition in utero and determining the progress of labor.

[0003] However, these traditional fetal heart rate monitors have significant limitations. On the one hand, the uterine pressure probe can only perform single-point local detection, while pregnant women's uterine contractions originate from the two uterine horns and converge toward the midline of the uterine fundus, with rhythmicity, symmetry, and polarity. That is, contractions occur within a certain range. This makes it difficult for the monitoring results to fully reflect the true situation of uterine contractions, and there are monitoring blind spots. For example, at the beginning of a contraction, if the uterine pressure probe is not in a position where uterine pressure changes significantly, it is very easy to miss or misjudge key data such as the intensity and frequency of uterine contractions, affecting the doctor's accurate judgment of the progress of labor and even delaying the optimal time for intervention. On the other hand, to achieve accurate uterine contraction monitoring, medical staff or pregnant women need to manually adjust the position of the uterine pressure probe multiple times. This operation is cumbersome and time-consuming, not only reducing monitoring efficiency, but frequent adjustments may also introduce additional measurement errors due to factors such as position deviation and changes in probe fit, further weakening the reliability and validity of the monitoring data. Summary of the Invention

[0004] The present invention aims to provide a wearable intelligent fetal heart monitoring device to solve the problem of limited monitoring range in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A wearable intelligent fetal heart monitoring device includes a uterine pressure detection belt, a fetal heart detection belt and two fixing belts. Both ends of the uterine pressure detection belt and the fetal heart detection belt are connected to the two fixing belts. The free ends of the two fixing belts are detachably connected. A piezoelectric film is fixed to the inner side of the uterine pressure detection belt. A fetal heart probe is provided on the fetal heart detection belt. The piezoelectric film and the fetal heart probe are connected to a signal amplifier, a filter and an analog-to-digital converter in sequence through electrodes. The analog-to-digital converter is electrically connected to a microcontroller, and the microcontroller is electrically connected to a communication module. A battery is provided on the uterine pressure detection belt for powering the signal amplifier, the filter, the digital-to-analog converter and the microcontroller.

[0007] Preferably, as an improvement, the microcontroller is further electrically connected to a timing module and a reminder module.

[0008] Preferably, as an improvement, the microcontroller is also electrically connected to a data storage module.

[0009] Preferably, as an improvement, a detection port is opened on the uterine pressure detection belt, and belt rollers are rotatably provided at the four corners of the detection port. The four belt rollers are connected to connecting belts, and the inner ends of the four connecting belts are respectively fixed on the fetal heart probe, and the other ends of the four connecting belts are respectively fixed on the four belt rollers. The four connecting belts can be respectively wound on the four belt rollers, and a locking mechanism for locking the belt rollers is installed on the belt rollers.

[0010] Preferably, as an improvement, the locking mechanism includes a belt roller seat, the belt roller is rotatably connected in the belt roller seat, the rotating shaft of the belt roller is a hollow spline shaft, and the top of the belt roller seat is slidably connected with a solid locking spline shaft. The locking spline shaft is inserted into the hollow spline shaft to lock the belt roller, and the belt roller can rotate after the locking spline shaft is pulled out from the hollow spline shaft.

[0011] Preferably, as an improvement, a smooth rod is connected to the bottom end of the locking spline shaft, the smooth rod is located inside the hollow spline shaft, and the diameter of the smooth rod is smaller than the inner diameter of the hollow spline shaft.

[0012] Preferably, as an improvement, it further comprises a support belt, the top of the support belt is detachably connected to the bottom of the fetal heart detection belt through a zipper, and both ends of the support belt are detachably connected.

[0013] Preferably, as an improvement, the free ends of the two fixing straps and the two ends of the support strap are detachably connected via Velcro.

[0014] Preferably, as an improvement, it further includes a heart rate monitoring bracelet, in which a heart rate monitoring module is provided, and the heart rate monitoring module is electrically connected to the signal amplifier, the filter and the analog-to-digital converter in sequence.

[0015] The principles and beneficial effects of this program are:

[0016] 1. This solution collects signals through the piezoelectric film in the uterine pressure detection belt and the fetal heart probe on the fetal heart detection belt. After processing through the signal amplifier, filter and analog-to-digital converter, it is transmitted to the microcontroller, and finally the data is transmitted remotely through the communication module. The uterine pressure detection belt uses a piezoelectric film, which can detect along the entire circle of the pregnant belly, which is more comprehensive than single-point detection; the fetal heart probe is directly set on the fetal heart detection belt, corresponding to the fetal heart position detection, which is convenient for monitoring. The battery powers each module, making the device portable. This solution can achieve comprehensive and accurate monitoring of uterine pressure and fetal heart rate at the same time, ensure data quality through modular signal processing, and facilitate real-time data transmission to medical staff when pregnant women are monitored at home through the communication module, realizing remote monitoring and improving monitoring efficiency and convenience. At the same time, this solution can also be stored in a bag for easy carrying, and pregnant women can also use it when going out.

[0017] 2. The timing module records the monitoring duration. When the preset time is reached, the reminder module issues a prompt. On the one hand, this helps pregnant women arrange their monitoring time appropriately, avoiding incomplete data due to too short a monitoring time or physical discomfort caused by too long a monitoring time. On the other hand, timely reminders ensure that pregnant women do not miss the monitoring results and subsequent processing, improving the standardization and effectiveness of monitoring.

[0018] 3. Under the control of the microcontroller, the data storage module stores processed monitoring data such as uterine pressure and fetal heart rate. This facilitates the accumulation of monitoring data for pregnant women over a period of time, and facilitates subsequent data review, analysis, and comparison by medical staff, thereby providing a more comprehensive understanding of the conditions of pregnant women and fetuses at different stages, providing richer and more accurate data support for diagnosis and treatment.

[0019] 4. The connecting belt can be retracted and extended by rotating the belt roller, thereby adjusting the position of the fetal heart probe on the uterine pressure monitoring belt. Once adjusted, the belt roller is locked with a locking mechanism. The fetal heart probe position can be flexibly adjusted according to the different positions of the fetus in the pregnant woman's abdomen, ensuring accurate capture of fetal heart signals, improving monitoring accuracy and adaptability, and avoiding monitoring errors or missed detections due to improper probe positioning.

[0020] 5. The hollow spline shaft and solid locking spline shaft of the locking mechanism lock and unlock the belt roller by inserting and removing them. The smooth rod design facilitates the insertion and removal of the locking spline shaft. This structure locks firmly and reliably, and is simple and convenient to operate. Pregnant women can easily adjust and lock the probe position themselves. Compared with other locking methods, the spline shaft structure is more stable and durable, ensuring that the device maintains good locking performance during repeated use.

[0021] 6. The support strap is detachably connected to the bottom of the fetal heart rate monitoring belt via a zipper. Both ends are detachable, allowing you to support the pregnant woman's belly from the bottom. During monitoring, the support strap can effectively reduce the burden on the pregnant woman's abdomen and improve her comfort when wearing the device. It is especially suitable for pregnant women in the late stages of pregnancy, reducing the physical discomfort caused by long-term monitoring. At the same time, the detachable design increases the flexibility of the device.

[0022] 7. The free end of the fixing strap and both ends of the support strap are connected with Velcro for easy donning and removal. The operation is simple and convenient, allowing pregnant women to quickly put on and take off the device. The Velcro connection can be flexibly adjusted according to the size of the pregnant woman's abdomen, ensuring the fit and stability of the device while also making it easy to store and carry.

[0023] 8. The heart rate monitoring module within the heart rate monitoring bracelet collects the pregnant woman's heart rate signal, processes it through a signal amplifier, filter, and analog-to-digital converter, and then transmits it to the microcontroller. This enables real-time monitoring of the pregnant woman's heart rate. Medical staff can combine the pregnant woman's heart rate, uterine pressure, and fetal heart rate data to more comprehensively assess the health of the pregnant woman and fetus, promptly identifying possible heart problems or heart rate abnormalities caused by physical changes during pregnancy, providing richer information for pregnancy health management. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of Example 1 of the present invention.

[0025] Figure 2 This is a schematic structural diagram of the belt roller seat in Example 1 of the present invention.

[0026] Figure 3 This is a schematic structural diagram of the locking spline shaft in Example 2 of the present invention.

[0027] Figure 4 This is a structural diagram of Example 3 of the present invention. DETAILED DESCRIPTION

[0028] The following is further described in detail through specific implementation methods:

[0029] The figure marks in the drawings of the specification include: uterine pressure detection belt 1, piezoelectric film 11, fixing belt 2, Velcro 21, fetal heart detection belt 3, detection port 31, fetal heart probe 32, connecting belt 33, belt roller seat 34, belt roller 35, cross bar 36, locking spline shaft 37, hollow spline shaft 38, guide rod 39, smooth rod 4, support belt 5.

[0030] Example 1:

[0031] like Figure 1As shown, a wearable intelligent fetal heart monitoring device includes a uterine pressure detection belt 1, a fetal heart detection belt 3, and two fixing belts 2. Both ends of the uterine pressure detection belt 1 and the fetal heart detection belt 3 are sewn to the two fixing belts 2. The free ends of the two fixing belts 2 are sewn with Velcro 21 to achieve a detachable connection. A piezoelectric film 11 is glued and fixed to the inner side of the uterine pressure detection belt 1. The piezoelectric film 11 is made of a piezoelectric material such as polyvinylidene fluoride. A fetal heart probe 32 is mounted on the fetal heart detection belt 3. The piezoelectric film 11 and the fetal heart probe 32 are connected to a signal amplifier, a filter, and an analog-to-digital converter via electrodes. The signal amplifier is an operational amplifier, and the filter is a bandpass filter. The analog-to-digital converter is electrically connected to a microcontroller, which is a single-chip microcomputer. The microcontroller is electrically connected to a communication module, a timing module, a reminder module, and a data storage module. The communication module uses a Bluetooth module, the timing module uses a real-time clock chip (RTC), the data storage module uses a flash memory chip or an SD card, and the reminder module uses a piezoelectric ceramic buzzer or an electromagnetic buzzer. The uterine pressure detection belt 1 is equipped with a battery, which is used to power the signal amplifier, filter, digital-to-analog converter and microcontroller. The battery is a rechargeable battery such as a lithium battery.

[0032] The fetal heart probe 32 in this embodiment can adjust its monitoring position. Specifically, Figure 2 As shown, a detection port 31 is opened on the uterine pressure detection belt 1, and belt rollers 35 are rotatably installed at the four corners of the detection port 31. The four belt rollers 35 are connected to connecting belts 33. The inner ends of the four connecting belts 33 are respectively fixed on the fetal heart probe 32, and the other ends of the four connecting belts 33 are respectively fixed on the four belt rollers 35. The four connecting belts 33 can be wound on the four belt rollers 35 respectively. A locking mechanism for locking the belt roller 35 is installed on the belt roller 35, and the locking mechanism includes a belt roller seat 34, and the belt roller 35 is rotatably connected in the belt roller seat 34. The rotating shaft of the belt roller 35 is a hollow spline shaft 38, and the top two sides of the belt roller seat 34 are slidingly connected to guide rods 39. A cross bar 36 is connected between the two guide rods 39, and a solid locking spline shaft 37 is connected to the bottom of the cross bar 36, so that the locking spline shaft 37 can slide in the hollow spline shaft 38. The locking spline shaft 37 is inserted into the hollow spline shaft 38 to lock the belt roller 35. After the locking spline shaft 37 is pulled out from the hollow spline shaft 38, the belt roller 35 can rotate.

[0033] In actual use, the pregnant woman wraps the two fixing straps 2 around her abdomen, adjusting the positions so that the uterine pressure monitoring strap 1 fits around her abdomen and the fetal heart monitoring strap 3 covers the approximate area where the fetus is located. The tightness of the fixing straps 2 can be adjusted using the Velcro 21 to ensure that the device is neither too tight to compress the abdomen nor too loose to cause displacement.

[0034] The pregnant woman or medical staff first removes all locking spline shafts 37 from the hollow spline shaft 38, unlocking the four belt rollers 35. The fetal heart probe 32 is then manually moved according to the fetal position in the abdomen (usually around the pregnant woman's navel, with a limited adjustment range). During this movement, the belt rollers 35 rotate as the connecting belt 33 stretches or contracts. Once the fetal heart probe 32 is properly positioned, the locking spline shaft 37 is pressed downward to insert it into the hollow spline shaft 38, locking the belt rollers 35 and securing the fetal heart probe 32 in place.

[0035] Turn on the device's power switch, and the battery begins powering each module. The piezoelectric film 11 senses pressure changes in the pregnant woman's abdomen caused by uterine contractions in real time and converts the pressure signals into electrical signals. The fetal heart rate probe 32 uses ultrasound Doppler and other techniques to collect fetal heartbeat signals. These two signals are transmitted via electrodes to a signal amplifier, where they are amplified. A filter then filters out interference signals, retaining the valid signal frequency band. Next, an analog-to-digital converter converts the analog signal into a digital signal, which is then transmitted to a microcontroller for processing.

[0036] The microcontroller analyzes and calculates the received digital signals of uterine pressure and fetal heart rate, deriving key parameters such as contraction intensity, contraction frequency, and fetal heart rate. The microcontroller stores the processed data in a data storage module for subsequent review and analysis. Furthermore, the microcontroller wirelessly transmits the data to the pregnant woman's mobile phone or other terminal device via Bluetooth. The pregnant woman or medical staff can view the waveforms and parameter values ​​of the monitored data in real time using a dedicated app installed on the terminal device. The pregnant woman can access the real-time data via the mobile app at any time during the monitoring process, and can also view historical data records after the monitoring period. Medical staff can remotely access the pregnant woman's monitoring data through the terminal device, conduct detailed analysis, assess the health of the mother and fetus, and provide appropriate guidance and advice to the pregnant woman.

[0037] During the monitoring process, the microcontroller controls the timing module according to a preset program. When the preset monitoring duration is reached, the microcontroller sends an electrical signal to the reminder module, which emits a sound to remind the pregnant woman that monitoring is complete. Furthermore, the microcontroller can set alarm rules based on monitoring data. For example, if the fetal heart rate is abnormal or the intensity of uterine contractions is too high, the reminder module will emit a sound of a different frequency or rhythm, prompting the pregnant woman to pay attention and take appropriate measures.

[0038] Example 2:

[0039] Combine Figure 3As shown, the difference between this embodiment and embodiment 1 is that a smooth rod 4 is connected to the bottom end of the locking spline shaft 37. The smooth rod 4 is located inside the hollow spline shaft 38, and the diameter of the smooth rod 4 is smaller than the inner diameter of the hollow spline shaft 38. When the solid spline shaft is pulled out, the smooth rod 4 remains inside the hollow spline shaft 38, which prevents the solid spline shaft from being separated from the hollow spline shaft 38, making it easier to insert the solid spline shaft into the hollow spline shaft 38. At the same time, the small diameter of the smooth rod 4 does not affect the normal rotation of the belt roller 35.

[0040] Example 3:

[0041] Combine Figure 4 As shown, this embodiment differs from the first embodiment in that it further includes a support belt 5. The top of the support belt 5 is detachably connected to the bottom of the fetal heart rate monitoring belt 3 via a zipper, and the ends of the support belt 5 are detachably connected via Velcro 21. The support belt 5 can support the pregnant woman's belly from the bottom during the test, improving her comfort. The support belt 5 can be removed for cleaning when needed.

[0042] Example 4:

[0043] It also includes a heart rate monitoring bracelet (not shown in the figure), which is equipped with a heart rate monitoring module. The heart rate monitoring module adopts the heart rate monitoring module in the heart rate bracelet in the existing technology. The heart rate monitoring module is electrically connected to the signal amplifier, filter and analog-to-digital converter in sequence.

[0044] The heart rate bracelet collects real-time heart rate data for pregnant women, forming a comprehensive monitoring system with the uterine pressure monitoring belt 1 and fetal heart rate monitoring belt 3. A pregnant woman's heart rate reflects her physiological state. Conditions such as infection, fever, anemia, and heart disease can cause abnormal heart rate fluctuations. Fetal heart rate and uterine contraction data directly reflect the safety of the fetus in the womb. For example, when a pregnant woman is infected, the heart rate bracelet can promptly detect an abnormal increase in her heart rate. Combined with fetal heart rate changes detected by the monitoring system, medical staff can more quickly and accurately assess the impact of the infection on the pregnant woman and the fetus, avoiding one-sided judgments based solely on fetal heart rate data, thereby providing more comprehensive and detailed protection for the health of both mother and child.

[0045] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A wearable intelligent fetal heart monitoring device, characterized by: It includes a uterine pressure detection belt, a fetal heart detection belt and two fixing belts. Both ends of the uterine pressure detection belt and the fetal heart detection belt are connected to the two fixing belts. The free ends of the two fixing belts are detachably connected. A piezoelectric film is fixed on the inner side of the uterine pressure detection belt. A fetal heart probe is set on the fetal heart detection belt. The piezoelectric film and the fetal heart probe are connected to a signal amplifier, a filter and an analog-to-digital converter in sequence through electrodes. The analog-to-digital converter is electrically connected to a microcontroller, and the microcontroller is electrically connected to a communication module. A battery is set on the uterine pressure detection belt. The battery is used to power the signal amplifier, the filter, the digital-to-analog converter and the microcontroller.

2. A wearable intelligent fetal heart monitoring device according to claim 1, characterized in that: The microcontroller is also electrically connected to a timing module and a reminder module.

3. A wearable intelligent fetal heart monitoring device according to claim 2, characterized in that: The microcontroller is also electrically connected to a data storage module.

4. The wearable intelligent fetal heart monitoring device according to claim 1, characterized in that: There is a detection port on the uterine pressure detection belt, and belt rollers are rotatably set at the four corners of the detection port. The four belt rollers are connected to connecting belts. The inner ends of the four connecting belts are respectively fixed on the fetal heart probe, and the other ends of the four connecting belts are respectively fixed on the four belt rollers. The four connecting belts can be wound on the four belt rollers respectively, and a locking mechanism for locking the belt rollers is installed on the belt rollers.

5. The wearable intelligent fetal heart monitoring device according to claim 4, characterized in that: The locking mechanism includes a belt roller seat, the belt roller is rotatably connected to the belt roller seat, the rotating shaft of the belt roller is a hollow spline shaft, and the top of the belt roller seat is slidably connected with a solid locking spline shaft. The locking spline shaft can lock the belt roller when inserted into the hollow spline shaft. After the locking spline shaft is pulled out of the hollow spline shaft, the belt roller can rotate.

6. The wearable intelligent fetal heart monitoring device according to claim 5, characterized in that: The bottom end of the locking spline shaft is connected with a smooth rod, which is located in the hollow spline shaft. The diameter of the smooth rod is smaller than the inner diameter of the hollow spline shaft.

7. A wearable intelligent fetal heart monitoring device according to any one of claims 1 to 6, characterized in that: The utility model also includes a support belt, the top of which is detachably connected to the bottom of the fetal heart detection belt through a zipper, and the two ends of the support belt are detachably connected.

8. The wearable intelligent fetal heart monitoring device according to claim 7, characterized in that: The free ends of the two fixing straps and the two ends of the support strap are detachably connected via Velcro.

9. The wearable intelligent fetal heart monitoring device according to claim 1, characterized in that: It also includes a heart rate monitoring bracelet, which is equipped with a heart rate monitoring module. The heart rate monitoring module is electrically connected to the signal amplifier, filter and analog-to-digital converter in sequence.

Images