CN-122004816-A - Monitoring alarm system for home self-testing fetal movement fetal heart

CN122004816ACN 122004816 ACN122004816 ACN 122004816ACN-122004816-A

Abstract

The invention discloses a monitoring and alarming system for home self-testing of fetal movement and fetal heart. In the invention, the system can monitor fetal movement and fetal heart rate in real time, so that the mother can know the condition of the fetus at any time. The system adopts Bluetooth or Wi-Fi technology to wirelessly transmit data to a smart phone or other devices, so that the mother can conveniently check and store the data. The system is internally provided with an intelligent algorithm for analyzing fetal movement and fetal heart data, and if abnormality is detected, the system should prompt the pregnant woman in time and recommend medical treatment. The system can store historical monitoring data, is convenient for doctors to carry out long-term trend analysis, and a user support module in the system provides online or telephone customer support, uses tutorial and health education information, and helps pregnant women to better understand and use the device, so that convenience and rapidness of the whole system in use are improved, the system is a good helper for the pregnant women, anxiety of the pregnant women can be reduced, doctors can see timely when problems are found, and prenatal and postnatal care is promoted.

Inventors

JIANG XIAOYAN
ZHANG LI
WU YAN
HU XINYUE
ZHANG HUA

Assignees

上海市宝山区罗店医院

Dates

Publication Date: 20260512
Application Date: 20240110

Claims (10)

1. The household self-testing fetal heart monitoring alarm system comprises a power supply module (1), an information acquisition module (2), a wireless communication module (3), a data analysis module (4), a historical data tracking module (5), a user support module (6), a fetal heart rate extraction algorithm module (7), fetal heart rate preprocessing (8) and a fetal heart rate calculation module (9), and is characterized in that the output end of the power supply module (1) is connected with the input end of the information acquisition module (2), the output end of the information acquisition module (2) is connected with the input end of the wireless communication module (3), the output end of the wireless communication module (3) is connected with the input end of the data analysis module (4), the output end of the data analysis module (4) is connected with the input end of the historical data tracking module (5), and the output end of the historical data tracking module (5) is connected with the input end of the user support module (6).
2. The monitoring and alarming system for home self-testing fetal heart as claimed in claim 1, wherein a fetal electrocardio extraction algorithm module (7), a fetal electrocardio data preprocessing module (8) and a fetal heart rate calculating module (9) are arranged in the data analyzing module (4), and the integral output ends of the fetal electrocardio extraction algorithm module (7), the fetal electrocardio data preprocessing module (8) and the fetal heart rate calculating module (9) are connected with the input end of the data analyzing module (4).
3. The home self-test fetal heart monitoring alarm system as set forth in claim 1, wherein the information acquisition module (2) comprises a pre-amplifying circuit consisting of an instrument amplifier and used for improving the voltage level of an original signal, a first-order active high-pass filter (HIGHPASSFILTER, HPF) consisting of an MCP6271 operational amplifier and an RC filter configured by Sallen-Key, wherein the part can eliminate direct current offset generated between electrodes, a fifth-order active Bessel low-pass filter (LowPassFilter, LPF) consisting of a first-order low-pass filter and two second-order Sallen-Key filters and used for removing the influence of high-frequency noise, a double-T active notch filter consisting of two T-shaped RC filters and an MCP6271 operational amplifier is used for reducing the interference of 50Hz and harmonic waves, a right-leg driving circuit is added at the front end of the acquisition circuit to eliminate common-mode signal interference generated by a parent body, and a biochip is added to obtain a higher-quality fetal heart of the integrated circuit.
4. The home self-test fetal heart monitoring alarm system as set forth in claim 1, wherein the wireless communication module (3) uses a BLE4.0 Bluetooth module for communicating with devices such as a desktop computer and a smart phone, and timely transmits collected fetal data to an upper computer so as to analyze the health condition of a fetus, the system can modify matching parameters such as roles (master and slave modes) and serial port baud rate, device names and passwords, the use is convenient, the BLE4.0 module is a unique transparent low-power Bluetooth module for an embedded system, and an AT command control or a transparent serial TTL interface is realized based on a module of CC2540 of TI company, so that the device can communicate with any device supporting BLE with minimum consumption, and in addition, the system can be used as a USB-to-TTL conversion module AT the same time, so that the system can have USB ports without additional chips.
5. The monitoring and alarming system for the fetal heart in the home self-testing mode is characterized in that a processor module is arranged in the data analysis module (4), MSP430F5529 is selected as a main control unit by the processor module, the MSP430F5529 micro-control unit mainly aims at practical application requirements, a plurality of analog circuits, digital circuits and microprocessors are integrated on a chip to provide a single-chip solution, the design of the fetal heart monitoring system control circuit in the home environment mainly comprises the steps of configuring a system clock (MCLK), a Subsystem Clock (SCLK) and an Auxiliary Clock (ACLK) of the main control unit, keeping balance of processing speeds at different high and low frequencies respectively, controlling the sampling rate of the ECG and the system clock by a timer, sampling and quantizing signals by an internal 12-bit ADC, and then carrying out digital filtering, waveform displaying and data transmission.
6. A monitoring and alarming system for home self-testing fetal heart as set forth in claim 1, wherein the fetal heart extraction algorithm module (7) uses a Kalman filter to extract fetal heart, the Kalman filter belongs to the category of an adaptive filter and is a very effective method for eliminating parent ECG, only one parent ECG needs to be provided as a reference, then the parent ECG can be filtered out and the amplitude of FECG is improved, from the mathematical point of view, the acquired mixed ECG signal is composed of three parts, namely parent electrocardio (MECG), NOISE (NOISE) and FECG, wherein the NOISE part of the fetal heart is filtered out in a software filtering mode, mainly 50Hz power frequency, myoelectric signal, baseline fluctuation, parent motion and the like, and the NOISE part is removed by using the filter.
7. A home self-test fetal heart monitoring and alarming system as set forth in claim 1 wherein the fetal heart data preprocessing (8) first uses a smoothing filter in digital filtering to construct a 50Hz notch filter to smooth the extracted signal, removes the power frequency interference and the abdomen electrocardiogram after baseline drift, extracts the high quality electrocardiogram obtained by the previous preprocessing by using an adaptive filtering technology, and then can evaluate the extracted FECG heart rate by calculating the main peak value and dividing the counted heart beat by the signal duration.
8. A monitoring alarm system for home self-testing fetal heart is characterized in that an initial threshold value is determined by a fetal heart rate calculation module (9), then R waves are detected, sampling points are detected in a later sampling interval, if X (n) is larger than THD, the peak of the R waves is determined by a maximum value X (max) in X (n), the peak of the R waves which occurs earlier is detected, then a new threshold value is continuously given by combining the data which occur, a new threshold value determination formula is THDnew =0.8xTHD+1.5xX (max) X0.2, the fetal heart rate calculation module (9) adopts a first-order differential threshold value method for detecting fetal movement signals, correct fetal movement data are identified, firstly differential operation is completed on signals in a set time window, each peak value in the signals can be located according to the difference operation, comparison between the peak value and the set threshold value is completed, and in order to improve the accuracy of the detection, and the fetal movement feeling is poor according to the strong and weak interference relation between the fetal movement threshold value and the length of the time window.
9. A monitoring and alarming system for home self-testing fetal movement and fetal heart as set forth in claim 1, wherein the historical data tracking module (5) can store historical monitoring data to facilitate a doctor to conduct long-term trend analysis.
10. A home self-testing fetal heart monitoring alarm system as claimed in claim 1 wherein the user support module (6) provides on-line or telephone customer support and uses tutorial and health education information to assist the pregnant woman in better understanding and using the device.

Description

Monitoring alarm system for home self-testing fetal movement fetal heart Technical Field The invention belongs to the technical field of fetal movement fetal heart monitoring, and particularly relates to a monitoring alarm system for home self-testing fetal movement fetal heart. Background In recent years, with the change of people's living habits and the relaxation of policies, pregnant women are gradually increased in number, and the proportion of high-risk pregnant women cannot be ignored. Fetal safety is an important component of perinatal care, and fetal heart monitoring is currently the main monitoring means for assessing fetal risk. The fetal heart monitoring is applied to clinical work of obstetrics in a common, simple and easy way without wound, and can find fetal heart abnormality early, so that when a fetus is not suffered from irreversible damage, an effective delivery mode and first-aid measures are adopted, and the best neonate can be delivered in time. The method can be used for monitoring the prenatal fetal heart of pregnant and lying-in women, can more accurately evaluate the intrauterine condition of the fetus, and has important effects on preventing neonatal asphyxia and fetal distress. However, the traditional fetal heart monitoring system needs to be completed by a pregnant woman in situ, has the disadvantages of time consumption, complicated steps, low efficiency and the like, and is unfavorable for simply, conveniently and efficiently expanding the perinatal fetal state assessment Disclosure of Invention The invention aims to solve the problems and provide a monitoring and alarming system for home self-testing of fetal movement and fetal heart. The household self-testing fetal heart monitoring and alarming system comprises a power supply module, an information acquisition module, a wireless communication module, a data analysis module, a historical data tracking module, a user support module, a fetal heart electricity extraction algorithm module, a fetal heart rate calculation module, wherein the output end of the power supply module is connected with the input end of the information acquisition module, the output end of the information acquisition module is connected with the input end of the wireless communication module, the output end of the wireless communication module is connected with the input end of the data analysis module, the output end of the data analysis module is connected with the input end of the historical data tracking module, and the output end of the historical data tracking module is connected with the input end of the user support module. In a preferred embodiment, the data analysis module is internally provided with a fetal heart rate extraction algorithm module, a fetal heart rate data preprocessing and a fetal heart rate calculation module, and the integral output end of the fetal heart rate extraction algorithm module, the fetal heart rate data preprocessing and the fetal heart rate calculation module is connected with the input end of the data analysis module. In a preferred embodiment, the information acquisition module comprises a pre-amplifier circuit consisting of an instrumentation amplifier for increasing the voltage level of the original signal, a first-order active high-pass filter consisting of an MCP6271 operational amplifier and an RC filter configured with Sallen-Key, which eliminates DC offset between the electrodes, a fifth-order active Bessel low-pass filter consisting of a first-order low-pass filter and two second-order Sallen-Key filters for removing the effects of high frequency noise, and a double-T active notch filter consisting of two "T" -shaped RC filters in combination with an MCP6271 operational amplifier for reducing the 50Hz power frequency and the harmonic interference thereof. A right leg driving circuit is added at the front end of the acquisition circuit to eliminate common mode signal interference generated by a parent body. In addition, a biological electrocardio integrated chip circuit is added to obtain a higher-quality fetal electrocardio signal. In a preferred embodiment, the wireless communication module uses a BLE4.0 bluetooth module for communication with a desktop computer, a smart phone, etc., and timely transmits the collected fetal data to an upper computer for analyzing the health status of the fetus. The character and serial port baud rate, the equipment name, the password and other matching parameters can be modified, and the use is convenient; the BLE4.0 module is a unique transparent bluetooth low energy module for embedded systems. The TI company CC2540 based module implements an AT command control or transparent serial TTL interface that enables devices to communicate with any BLE-capable device with minimal consumption. In addition, the USB-to-TTL conversion module can be used as a USB-to-TTL conversion module, so that the system can have a USB port without an additional chip. In a preferred embodiment,