Display screen awakening method, display screen, ultrasonic fetal heart measurement posture early warning method and split type ultrasonic fetal heart meter

Abstract

The invention relates to the technical field of medical instruments, and discloses a display screen awakening method, a display screen, an ultrasonic fetal heart measurement posture early warning method and a split type ultrasonic fetus-voice meter. The display screen awakening method comprises the following steps: S100, starting a power supply to supply power; s200, shaking the display screen to enable the vibration sensor to start working; s300, the vibration sensor sends a pulse signal to a first MCU of the display screen circuit, and the first MCU of the display screen circuit is awakened to enter a working state; s400, enabling the display screen to be in a working state after the first MCU of the display screen circuit is started; and S500, the display screen receives the data signal transmitted by the host through the first wireless module and displays the data signal. The signal of the vibration sensor directly awakens the first MCU to enter a working state, intermediate logic judgment is not needed, and awakening reliability is ensured; through a collaborative design method of vibration sensing and wireless split, two inherent defects of physical keys and operation postures are solved.

Description

Technical Field

[0001] The present invention relates to the field of medical device technology, and in particular to a display screen wake-up method. Furthermore, the present invention also relates to a display screen, an ultrasonic fetal heart rate measurement posture warning method, and a split-type ultrasonic fetal heart rate monitor. Background Art

[0002] A fetal Doppler is a medical device that uses ultrasound technology to detect the fetal heartbeat. It is primarily used for fetal heart monitoring during pregnancy to help assess fetal health. Based on the Doppler effect, a fetal Doppler monitor transmits high-frequency ultrasound waves (usually 2-5 MHz) through a probe. These waves hit the fetal heart and reflect back to the probe. The device analyzes the changes in the echo frequency to calculate the fetal heart rate (FHR) and displays it numerically or audibly. Currently, this is the safest and most widely used method for fetal heart monitoring. Compared to traditional stethoscopes, it can detect the fetal heartbeat earlier (around 10 weeks of gestation), greatly improving the convenience and reliability of fetal monitoring during pregnancy.

[0003] Existing ultrasound fetal heart monitors are mainly divided into two categories: large all-in-one medical devices and portable all-in-one home devices. Medical devices are bulky and complex to operate; while home devices are smaller in size, they generally adopt an all-in-one design and have the following inherent defects: (1) During use, the user needs to hold the probe and observe the screen at the same time. The operating posture is limited and the user needs to lower his head to view the screen. Long-term use can easily cause cervical fatigue. In addition, the user cannot view data in real time and often needs to interrupt monitoring when viewing data. (2) Physical buttons are easily damaged due to frequent pressing, and increase the difficulty of waterproof design; (3) The whole device is difficult to disinfect, and the probe and electronic components cannot be separated for cleaning. Especially for pregnant users, the existing button wake-up method responds slowly in emergency situations, and the success rate of wet hand operation is significantly reduced. Summary of the Invention

[0004] The present invention provides a display screen wake-up method, a display screen, an ultrasonic fetal heart measurement posture warning method, and a split ultrasonic fetal heart monitor. Through a collaborative design method of vibration sensing and wireless splitting, the present invention solves the technical problems of existing ultrasonic fetal heart monitors, such as limited operating posture, inconvenient physical button operation, and easy damage.

[0005] According to one aspect of the present invention, a method for waking up a display screen is provided, comprising the following steps: S100, starting power supply; S200, shaking the display screen to start a vibration sensor; S300, the vibration sensor sends a pulse signal to a first MCU of a display screen circuit, waking up the first MCU of the display screen circuit and putting it into operation; S400, after starting the first MCU of the display screen circuit, putting the display screen into operation; S500, the display screen receives a data signal transmitted by a host via a first wireless module and displays the signal.

[0006] Furthermore, a step is added after step S400: S600, the vibration sensor does not send a new pulse signal to the first MCU of the display circuit for more than a preset time, and the first MCU does not receive a data signal transmitted from the host, the first MCU is in low power consumption mode and controls the display screen to be in an inoperative state.

[0007] Furthermore, after the power supply is started in step S100, the first power module and the vibration sensor are both in a working state until the power is turned off and then stop running.

[0008] According to another aspect of the present invention, a display screen is also provided, which is awakened using the above-mentioned display screen awakening method, including: a first power module, used for power supply; a first wireless module, used for wirelessly connecting to a host to receive a test data signal transmitted by the host; a first MCU, used for real-time control, data processing, communication interaction and low-power management; a vibration sensor, used for sending a pulse signal to the first MCU after being vibrated to wake up the first MCU and put it into working state; a display module, used for displaying data information; the first power module is electrically connected to the first wireless module, the first MCU, the vibration sensor and the display module respectively, and the first MCU is electrically connected to the first wireless module, the vibration sensor and the display module respectively.

[0009] Furthermore, the display screen also includes: a first charging module, electrically connected to the first power module, for charging the first power module; and / or a first magnetic module, for magnetically connecting to the host.

[0010] According to another aspect of the present invention, an ultrasonic fetal heart measurement posture warning method is also provided, including the above-mentioned display screen wake-up method, including the following steps: S10, the host is turned on and the power supply is started; S20, the second MCU is started and drives the transducer to work; S30, the transducer returns a test data signal to the second MCU, and the test data is processed by the second MCU and sent to the first wireless module of the display screen via the second wireless module. The current test data is displayed on the display screen, and the audio signal processed by the second MCU is output through the audio module; S40, during the operation of the transducer, the position offset of the transducer in the three directions of X, Y, and Z is simultaneously measured by the three-axis sensor, and an early warning reminder is issued when the three-axis sensor detects data changes.

[0011] Furthermore, the piezoelectric ceramic transducer used in the transducer is based on the mutual conversion between electrical energy and mechanical energy and / or acoustic energy through the piezoelectric effect; the ultrasonic signal receiving circuit amplifies the test data signal received by the transducer through the signal filtering and amplifying circuit and then transmits it back to the second MCU for data processing.

[0012] Furthermore, step S30 also includes: transmitting the test data processed by the second MCU to the mobile terminal via the Bluetooth module, and displaying the current test data via the mobile terminal.

[0013] According to another aspect of the present invention, a split-type ultrasonic fetal heart rate monitor is also provided, which uses the above-mentioned ultrasonic fetal heart rate measurement posture warning method to perform measurement posture warning, including the above-mentioned display screen and a host, the host including: a second power supply module for power supply; a second wireless module for wirelessly connecting to the display screen to transmit a test data signal to the display screen; a second MCU for real-time control, data processing, communication interaction and low-power management; a three-axis sensor for simultaneously measuring the position offset in the three directions of X, Y and Z; a probe with a transducer for measurement; the second power supply module is electrically connected to the second wireless module, the second MCU, the three-axis sensor and the probe, respectively, and the second MCU is electrically connected to the second wireless module, the three-axis sensor and the probe, respectively.

[0014] Furthermore, the three-axis sensor adopts a gyroscope; and / or the first power module and the second power module adopt lithium batteries; and / or the transducer adopts a piezoelectric ceramic transducer.

[0015] Furthermore, the host also includes: a second charging module, which is electrically connected to the second power module and is used to charge the second power module; and / or a second magnetic module, which is magnetically connected to the first magnetic module to achieve a magnetic connection between the display screen and the host.

[0016] The present invention has the following beneficial effects: The display screen wake-up method of the present invention uses a first wireless module to automatically adapt to the host, so that the display screen can realize a separate module design from the host, and the data flow does not rely on physical connection. The physical button is replaced by a vibration sensor to eliminate the mechanical pressing action. The vibration trigger uses a pulse signal to directly wake up the first MCU, avoiding the problems of metal contact oxidation or rubber aging of traditional buttons, significantly extending the hardware life, and eliminating the need for a waterproof and sealed button structure, reducing the design complexity. Shaking to wake up allows the user to simultaneously activate the display screen when operating the probe with one hand, without having to look down or interrupt monitoring; the first wireless module realizes split data transmission to free up the fixed position of the display module. The user can freely adjust the placement position and placement angle of the display screen to avoid cervical fatigue, and the monitoring process of the host does not need to be interrupted. The triggering delay of the vibration sensor is lower than the mechanical response time of the physical button. The first MCU wake-up and wireless data transmission are processed in parallel, shortening the overall response link, which can improve the wake-up speed in emergency situations and reduce operation delays. The link between vibration sensor, first MCU, wireless data transmission, and display module is complete. The vibration sensor signal directly wakes up the first MCU, eliminating the need for intermediate logic and ensuring wake-up reliability. Wireless transmission of measurement data relies on host signals, and the display module is independently powered to ensure data display functionality, ensuring the feasibility of a separate display and host design. This collaborative design approach of vibration sensing and wireless separation addresses the inherent drawbacks of physical buttons and operating posture.

[0017] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 is a flow chart of a display screen wake-up method according to a preferred embodiment of the present invention; Figure 2 is a display screen circuit diagram of a preferred embodiment of the present invention; Figure 3 1 is a circuit diagram of a split-type ultrasonic fetal heart monitor according to a preferred embodiment of the present invention; Figure 4 1. It is a structural diagram of the magnetic connection of the split-type ultrasonic fetal heart monitor according to a preferred embodiment of the present invention; Figure 5 1 is a schematic cross-sectional structural diagram of a magnetic connection portion of a preferred embodiment of the present invention; Figure 6 1 is a schematic cross-sectional view of a split-type ultrasonic fetal heart rate monitor according to a preferred embodiment of the present invention; Figure 7 This is a structural diagram of the host housing connection of a preferred embodiment of the present invention; Figure 8 It is a structural schematic diagram of the host inner cover and the host outer cover of a preferred embodiment of the present invention.

[0019] Legend: 100, display screen; 101, first power module; 102, first wireless module; 103, first MCU; 104, vibration sensor; 105, display module; 106, first charging module; 107, first magnetic module; 108, display screen front shell; 109, display screen back shell; 110, display screen magnet; 111, display screen dust plug; 112, display screen power supply; 113, display screen panel; 114, display screen mainboard; 200, host; 201, second power module; 202, second wireless module; 203, second MCU; 204, three-axis sensor; 205, probe; 2051, transducer; 2052, ultrasonic emission drive circuit; 2053, ultrasonic signal receiving circuit; 2054, signal filtering and amplifying circuit; 206, second charging module; 207, first Second magnetic module; 208, Bluetooth module; 209, audio module; 210, host front shell; 211, host back shell; 212, host dust plug; 213, host inner cover; 214, host outer cover; 215, host power supply; 216, button motherboard; 2161, host button; 2162, cantilever; 217, charging port motherboard; 218, probe motherboard; 219, transducer; 220, host magnet; 300, mosaic structure; 301, first concave surface; 302, second convex surface; 401, card slot; 402, top column; 403, oblique circular buckle; 404, convex rib; 405, first buckle position; 406, first convex rib; 407, second convex rib; 408, first groove. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0021] Figure 1 is a flow chart of a display screen wake-up method according to a preferred embodiment of the present invention; Figure 2 is a display screen circuit diagram of a preferred embodiment of the present invention; Figure 3 1 is a circuit diagram of a split-type ultrasonic fetal heart monitor according to a preferred embodiment of the present invention; Figure 4 1. It is a structural diagram of the magnetic connection of the split-type ultrasonic fetal heart monitor according to a preferred embodiment of the present invention; Figure 5 1 is a schematic cross-sectional structural diagram of a magnetic connection portion of a preferred embodiment of the present invention; Figure 6 1 is a schematic cross-sectional view of a split-type ultrasonic fetal heart rate monitor according to a preferred embodiment of the present invention; Figure 7 This is a structural diagram of the host housing connection of a preferred embodiment of the present invention; Figure 8 It is a structural schematic diagram of the host inner cover and the host outer cover of a preferred embodiment of the present invention.

[0022] like Figure 1 As shown, the display screen wake-up method of this embodiment includes the following steps: S100, start the power supply; S200, shake the display screen to start the vibration sensor 104; S300, the vibration sensor 104 sends a pulse signal to the first MCU 103 of the display screen circuit, waking up the first MCU 103 of the display screen circuit and entering the working state; S400, after the first MCU 103 of the display screen circuit is started, the display screen is in the working state; S500, the display screen receives the data signal transmitted by the host via the first wireless module 102 and displays it. In the display screen wake-up method of the present invention, the display screen 100 uses the first wireless module 102 to automatically adapt to the host 200, so that the display screen 100 and the host 200 can realize a module separation design, and the data flow does not rely on a physical connection. The vibration sensor 104 replaces the physical button, eliminating the mechanical pressing action, and the vibration trigger uses a pulse signal to directly wake up the first MCU 103, avoiding the problems of metal contact oxidation or rubber aging of traditional buttons, significantly extending the hardware life, and eliminating the need for a waterproof and sealed button structure, reducing the design complexity. The shake-to-wake feature allows users to simultaneously activate the display screen 100 while operating the probe 205 with one hand, eliminating the need to look down or interrupt monitoring. The first wireless module 102 implements split data transmission, freeing the display module 105 from being fixed. Users can freely adjust the display screen 100's placement and viewing angle, avoiding cervical strain, without interrupting the host 200's monitoring process. The vibration sensor 104's triggering delay is lower than the mechanical response time of a physical button. The first MCU 103 wakes up and wireless data transmission are processed in parallel, shortening the overall response chain, improving wakeup speed in emergencies and reducing operational delays. The link from vibration sensor 104 to first MCU 103 to wireless data transmission to display on the display module 105 is closed. The signal from the vibration sensor 104 directly wakes up the first MCU 103, entering operational mode without requiring intermediate logic, ensuring wakeup reliability. Wireless transmission of measurement data relies on signals from the host 200, while the display module 105 is independently powered to ensure data display functionality, ensuring the feasibility of a separate design for the display screen 100 and host 200. This collaborative design approach of vibration sensing and wireless separation addresses the inherent drawbacks of physical buttons and gesture control.

[0023] like Figure 1 and Figure 2As shown, in this embodiment, step S600 is added after step S400: if the vibration sensor 104 does not send a new pulse signal to the first MCU 103 of the display screen circuit for more than a preset time, and the first MCU 103 does not receive a data signal transmitted from the host, the first MCU 103 is in low power consumption mode and controls the display screen to be in an inoperative state. Through dual condition judgment, the first condition is that there is no new pulse signal from the vibration sensor 104, and the second condition is that there is no data signal from the host 200. When both conditions are met at the same time and the preset time is reached, the low power consumption mode is triggered, and the power management unit of the first MCU 103 is used to dynamically shut down non-essential circuits, leaving only the first power module 101 and the vibration sensor 104 in an operational state; it can significantly reduce standby power consumption, extend the single charge usage time of the device, solve the pain point of frequent charging of the fetal heart monitor, and avoid waste of resources caused by users forgetting to shut down. Optionally, a preset time threshold of 4s (which can also be set to 10s, 1min, 5min, etc., according to needs and application scenarios) is used as a judgment condition to avoid false triggering of sleep due to the user's brief cessation of operation (such as adjusting posture), and to prevent long-term idle power consumption; to achieve "unconscious energy saving", the user does not need to manually shut down the device, which ensures the convenience of waking up at any time and avoids power waste. The device enters sleep mode only when there is no signal from the vibration sensor 104 (no user operation) and no data transmission from the host 200 (no continuous monitoring requirement), avoiding false sleep during fetal heart monitoring (such as the probe 205 is still working but the user has not shaken the display 100). The coordinated control of the output signal of the hardware-based vibration sensor 104 and the power management of the first MCU 103 does not rely on additional algorithms or peripherals, so as to realize the split design of the display 100 and the host 200 and the demand for low power consumption.

[0024] like Figure 1 and Figure 2 As shown, in this embodiment, after power is initiated in step S100, both the first power module 101 and the vibration sensor 104 are in an operational state until the power is turned off and the system ceases operation. While powered on, the vibration sensor 104 remains operational (non-intermittent), enabling real-time detection of shaking signals and eliminating the sensor's own startup time. The total delay from shaking to waking up the first MCU 103 can be shortened to milliseconds, resulting in a faster response than key-press wakeup in emergency situations. Vibration signals are random events (users may shake at any time), and continuous power supply prevents signal omissions and ensures wakeup reliability. Although the vibration sensor 104 operates continuously, its low power consumption, combined with the dormant state of the first MCU 103 and other functional components of the display screen 100, results in significantly lower overall system power consumption than traditional all-in-one devices. By combining the constant operation of the critical vibration sensor 104 with the dynamic dormancy of the remaining modules, an optimal balance between response speed and power consumption is achieved at the hardware level, without relying on software polling or complex algorithms.

[0025] like Figure 2 As shown, the display screen of this embodiment is awakened using the above-mentioned display screen awakening method and includes: a first power module 101 for power supply; a first wireless module 102 for wirelessly connecting to a host computer to receive test data signals transmitted by the host computer; a first MCU 103 for real-time control, data processing, communication interaction, and low-power management; a vibration sensor 104 for sending a pulse signal to the first MCU 103 after being vibrated to awaken the first MCU 103 and put it into operation; and a display module 105 for displaying data information. The first power module 101 is electrically connected to the first wireless module 102, the first MCU 103, the vibration sensor 104, and the display module 105, respectively. The first MCU 103 is electrically connected to the first wireless module 102, the vibration sensor 104, and the display module 105. The display screen 100 is designed to be independent of the host computer 200, thereby separating fetal heart rate measurement from the viewing of measurement data. Vibration sensor 104 directly detects user action (shaking) and generates a pulse signal to trigger the first MCU 103 to wake up, achieving a buttonless wake-up function. This eliminates the need for physical buttons and addresses the issues of traditional buttons being easily damaged and poorly waterproof. With vibration sensor 104 as the only constantly powered detection unit, the first MCU 103, first wireless module 102, and display module 105 are all in a dormant state. This significantly reduces standby power consumption of the display 100 and extends device battery life. The direct connection architecture, which sequentially connects the vibration signal, MCU wake-up, wireless communication, and display output, achieves a millisecond-level response from vibration detection to display, surpassing traditional button-based wake-up solutions. Each functional module (first power module 101, first wireless module 102, vibration sensor 104, and display module 105) is electrically isolated and controlled by the first MCU 103, improving circuit reliability and ensuring that a single module failure does not affect overall functionality. Direct data exchange between the first wireless module 102 and the first MCU 103 ensures real-time transmission of measurement data from the probe 205 to the display 100, eliminating display delays. Through the collaborative design of vibration sensing and wireless transmission, core performance indicators such as device wake-up speed and real-time data display are maintained while eliminating physical buttons, achieving a unified approach of structural simplification and functional optimization. An MCU (Microcontroller Unit), also known as a single-chip microcomputer, is a microcomputer system that integrates a central processing unit (CPU), memory, counters, and various peripheral interfaces (such as USB, A / D conversion, and UART) on a single chip. Its core features include high integration, low power consumption, and low cost.

[0026] In this embodiment, the vibration sensor 104 is a vibration switch. When used as the vibration sensor 104, the vibration switch is a purely mechanical structure (no quiescent current) and conducts only when vibrating, consuming no additional power. Compared to MEMS sensors (microelectromechanical systems, functional devices that implement microelectromechanical system sensing and signal processing), this achieves true zero-power detection, significantly extending device battery life. When the vibration switch is turned on, it directly outputs high / low level pulses, eliminating the need for signal conditioning circuitry and allowing direct connection to the external interrupt pins of the first MCU 103. The wake-up latency is extremely low, ensuring real-time response from the first MCU 103 from sleep mode. The vibration switch is a mechanical contact switch that is insensitive to microvibrations (it triggers only when a threshold acceleration is reached), preventing false wake-ups. In complex motion scenarios (such as walking), the false trigger rate is significantly lower than that of the analog vibration sensor 104. The vibration switch has a simple structure, requiring no calibration or complex signal processing, reducing costs, and offers superior shock resistance and temperature stability compared to MEMS sensors. The vibration switch only detects the presence or absence of vibration, not the direction or intensity of vibration, making it suitable for binary triggering scenarios (such as wake-up / sleep switching). The vibration switch, with its advantages of low power consumption (even zero power consumption), high reliability and low cost, perfectly meets the basic requirements of "vibration wake-up display 100".

[0027] like Figure 2 As shown, in this embodiment, the display screen also includes: a first charging module 106 electrically connected to the first power module 101 for charging the first power module 101; and / or a first magnetic module 107 for magnetically connecting to the host. The display screen 100 is used to connect to the host 200 via magnetic attraction and to communicate data signals with the host 200 via wireless communication. The display screen 100 adopts a collaborative design of magnetic attraction and wireless communication. The magnetic structure provides physical attraction, eliminating the need for plug-in interfaces, enabling quick and accurate connection and separation with the host 200. This allows for instant installation and removal with one hand, while avoiding issues such as wear and tear on the mechanical interface. The display screen 100 and the host 200 are remotely and automatically connected via a wireless module, allowing the display screen 100 to maintain data display even after being disconnected from the host 200. The display screen 100 can be placed anywhere nearby and can even be magnetically attached to any nearby magnetic metal to facilitate viewing of the data displayed on the display screen 100. The design without physical interfaces (pure magnetic attraction + wireless) combined with the low power consumption of the display screen circuitry can achieve a certain level of waterproof protection, making it suitable for use in wet and disinfected environments. Through the coordinated cooperation of magnetic attraction and wireless communication, device flexibility is achieved while ensuring reliable connection.

[0028] like Figure 3As shown, the ultrasonic fetal heart rate measurement posture warning method of this embodiment includes the above-mentioned display screen wake-up method, including the following steps: S10, the host is turned on and the power supply is activated; S20, the second MCU 203 is activated and drives the transducer 2051 to operate; S30, the transducer 2051 returns a test data signal to the second MCU 203. The test data is processed by the second MCU 203 and sent to the first wireless module 102 of the display screen via the second wireless module 202. The display screen displays the current test data. At the same time, the audio signal processed by the second MCU 203 is output via the audio module; S40, during the operation of the transducer 2051, the position deviation of the transducer 2051 in the X, Y, and Z directions is simultaneously measured by the three-axis sensor 204. When the three-axis sensor 204 detects a change in the data, an early warning is issued. The three-axis sensor 204 monitors the position deviation of the transducer 2051 in real time. When it detects that the probe 205 is tilted (for example, the X / Y / Z directions exceed a preset threshold), an early warning is immediately triggered (such as a speaker sound prompt, a buzzer sound prompt, or a display screen alert). The second MCU 203 synchronously processes test data, ensuring that the fetal heart rate signal is stable before transmitting it to the display screen 100. This prevents data distortion caused by probe 205 deviation, reduces measurement errors due to unstable grip or incorrect angle, improves fetal heart rate data accuracy, avoids signal loss due to poor contact of the probe 205, and ensures monitoring continuity. The triaxial sensor 204 monitors the probe 205's posture. If it detects the user maintaining a fixed posture for a long period of time or frequently shaking for a short period of time, it issues an alert to remind the user to adjust or maintain their posture. Combined with the display screen 100's wake-up method, the user no longer needs to look down frequently to check data, reducing strain on the cervical spine. This reduces muscle fatigue caused by prolonged monitoring and enhances the user experience. Intelligent alerts help users optimize their operating habits and improve monitoring efficiency. The triaxial sensor 204 can detect rapid movement or abnormal jitter (such as when the user urgently adjusts the probe 205 position). Combined with the real-time data processing of the second MCU 203, this ensures stable transmission of the fetal heart rate signal. The audio module 209 synchronously outputs an alert, allowing users to be notified of operational issues even when not viewing the display screen 100. This improves operational tolerance in emergency situations and reduces measurement failures caused by panic. Multimodal feedback (audio + screen) enhances real-time user guidance. Data changes from the triaxial sensor 204 do not interrupt fetal heart signal acquisition. The second MCU 203 independently processes and optimizes the data to ensure measurement stability. The second MCU 203 controls the triaxial sensor 204 to operate only when the transducer 2051 is operating, avoiding additional power consumption and complementing the low-power mode of the display 100. Through real-time monitoring from the triaxial sensor 204, intelligent processing by the second MCU 203, and multimodal early warning, precise posture correction is achieved at the hardware level without relying on complex algorithms, making it suitable for both home and medical scenarios.

[0029] like Figure 3As shown, in this embodiment, transducer 2051 utilizes a piezoelectric ceramic transducer, which converts electrical energy into mechanical energy and / or acoustic energy through the piezoelectric effect. Ultrasonic signal receiving circuit 2053 amplifies the test data signal received by transducer 2051 through signal filtering and amplification circuit 2054 and then transmits it back to second MCU 203 for data processing. The piezoelectric constant of the piezoelectric ceramic enables efficient conversion of electrical and acoustic energy. The mechanical resonance characteristics of the piezoelectric ceramic naturally form a narrow bandpass characteristic of ±5% of the center frequency, effectively suppressing broadband noise scattered by abdominal wall tissue and improving the signal-to-noise ratio (SNR) of the fetal Doppler signal. The piezoelectric ceramic has a transient response time of less than 0.1 μs, supporting short pulse excitation from the ultrasonic transmitter driver circuit 2052, achieving lower axial resolution and accurately distinguishing the various chamber structures of the fetal heart. The piezoelectric ceramic has a high Curie point and minimal sensitivity variation within the body temperature range, preventing sensitivity degradation caused by temperature drift when exposed to the pregnant woman's abdomen for a long time.

[0030] like Figure 3 As shown, in this embodiment, step S30 also includes: transmitting the test data processed by the second MCU 203 to the mobile terminal via the Bluetooth module, and displaying the current test data on the mobile terminal. The Bluetooth module 208 is directly connected to the second MCU 203, supporting the simultaneous transmission of measurement data to the display screen 100 (primary link) and the mobile terminal (auxiliary link). This enables synchronized display of data on the user end (display screen 100) and other ends (family members' mobile phone apps), meeting the dual needs of clinical monitoring and patient self-testing.

[0031] like Figure 3As shown, the split-type ultrasonic fetal heart rate monitor of this embodiment adopts the above-mentioned ultrasonic fetal heart rate measurement posture warning method for measurement posture warning, including the above-mentioned display screen 100 and the host 200, the host 200 including: a second power supply module 201 for power supply; a second wireless module 202 for wirelessly connecting to the display screen 100 to transmit the test data signal to the display screen 100; a second MCU 203 for real-time control, data processing, communication interaction and low power consumption management; a three-axis sensor 204 for simultaneously measuring the position offset in the three directions of X, Y and Z; a probe 205 having a transducer 2051 for measurement; the second power supply module 201 is electrically connected to the second wireless module 202, the second MCU 203, the three-axis sensor 204 and the probe 205, respectively, and the second MCU 203 is electrically connected to the second wireless module 202, the three-axis sensor 204 and the probe 205, respectively. The main circuitry of the split-type ultrasound fetal heart rate monitor utilizes an integrated triaxial sensor 204 for coordinated control with multiple modules. The triaxial sensor 204 monitors the displacement (X / Y / Z acceleration) and tilt of the main unit 200 in real time. The second MCU 203 detects changes in contact pressure between the probe 205 and the measurement site, automatically correcting for ultrasound echo signal attenuation caused by user jitter or maternal breathing, thereby reducing fetal heart rate detection errors. The triaxial sensor 204 data is combined with impedance feedback from the transducer 2051. When the probe 205 is tilted beyond a preset value or pressure is insufficient, the second MCU 203 controls an alarm (buzzer or warning light) to issue a warning signal. Alternatively, the second wireless module 202 can send a real-time alert to the display 100, preventing missed diagnoses. The integration of the triaxial sensor 204 and the second MCU 203 achieves three breakthroughs: optimized fetal heart rate signal quality, user guidance, and motion analysis. This enables the device to maintain medical-grade detection performance even in dynamic environments while meeting the dual clinical requirements of low power consumption and real-time performance. Optionally, the first power module 101 and / or the second power module 201 use lithium batteries. Optionally, the first power module 101 and / or the second power module 201 include a charging module for charging the lithium batteries.

[0032] like Figure 3As shown, in this embodiment, the three-axis sensor 204 uses a gyroscope; and / or the first power module 101 and the second power module 201 use lithium batteries; and / or the transducer 2051 uses a piezoelectric ceramic transducer. The three-axis sensor 204 uses a gyroscope, which directly measures the rate of change of the host unit along the X / Y / Z axes, accurately capturing the displacement changes caused by rotational jitter (such as a slight wrist turn) or other movements when the user holds the probe 205. The angular velocity data output by the gyroscope is used by the second MCU 203 to obtain the instantaneous tilt angle change of the probe 205, providing a time domain motion compensation reference for the ultrasonic echo signal, thereby issuing an early warning to eliminate Doppler signal phase distortion caused by sudden changes in the angle of the probe 205. Transducer 2051 uses a piezoelectric ceramic transducer. The high piezoelectric constant of piezoelectric ceramics enables efficient conversion of electrical energy into acoustic energy. The mechanical resonance characteristics of piezoelectric ceramics naturally form a narrow bandpass characteristic of ±5% of the center frequency, effectively suppressing broadband noise scattered by abdominal wall tissue and improving the signal-to-noise ratio (SNR) of the fetal heart Doppler signal. The transient response time of piezoelectric ceramics is less than 0.1μs, supporting short-pulse excitation of the ultrasonic emission drive circuit 2052, achieving lower axial resolution and accurately distinguishing the structures of various chambers of the fetal heart. The Curie point of piezoelectric ceramics is high, and the sensitivity changes little within the body temperature range, avoiding the attenuation of detection sensitivity due to temperature drift when in contact with the pregnant woman's abdomen for a long time.

[0033] like Figure 3 As shown, in this embodiment, the host 200 also includes: a second charging module 206 for electrically connecting to the second power module 201 to charge the second power module 201; and / or a second magnetic module 207 for magnetically connecting to the first magnetic module 107 to achieve a magnetic connection between the display screen 100 and the host 200. The display screen 100 and the host 200 are connected using a magnetic structure, which enables the host 200 and its probe 205 to be quickly aligned and adsorbed to the display screen 100 with one hand, without the need for plugging, unplugging, or calibration. During use, the display screen 100 can be quickly removed from the host 200, and the viewing angle of the display screen 100 can be quickly switched (such as by adsorbing it on a bed rail, a metal tabletop, a mobile phone holder, or by handheld operation), shortening the time required for a single detection. Wireless communication can still remotely and automatically maintain the data link even when the magnetic connection is disconnected. The coordinated design of magnetic and wireless technology without a physical interface allows the main unit 200 to be completely enclosed in a medical silicone sleeve. The display 100 and main unit 200 can be disinfected separately (e.g., by wiping with alcohol or irradiating with ultraviolet light), reducing the risk of cross-infection. In the event of an unexpected power outage on the main unit 200, the display 100 will continue to display measurement data, providing a buffer for emergency response. Through the coordinated optimization of magnetic and wireless technologies, while maintaining medical-grade reliability, the ease of use, adaptability to multiple scenarios, and hospital infection control capabilities of fetal heart rate monitoring are significantly improved, making it particularly suitable for obstetric clinics, delivery rooms, and emergency transport scenarios.

[0034] like Figure 3 As shown, in this embodiment, the probe 205 includes a transducer 2051, an ultrasonic transmission drive circuit 2052, an ultrasonic signal receiving circuit 2053, and a signal filtering and amplifying circuit 2054. The second MCU 203 is connected to the transducer 2051 via the ultrasonic transmission drive circuit 2052, and the transducer 2051 is connected to the second MCU 203 via the ultrasonic signal receiving circuit 2053 and the signal filtering and amplifying circuit 2054. The second MCU 203 directly drives the ultrasonic transmission drive circuit 2052, achieving precise control of the transmission frequency, pulse width, and power, ensuring that the ultrasonic penetration depth matches the fetal development stage. The direct connection architecture of transducer 2051 → ultrasonic signal receiving circuit 2053 → signal filtering and amplifying circuit 2054 → second MCU 203 avoids signal transmission loss and preserves the weak Doppler frequency shift characteristics in the original echo. The hierarchical processing design of the ultrasonic signal receiving circuit 2053 and the signal filtering and amplifying circuit 2054 first filters out high-frequency interference in the analog domain, reducing the subsequent digital signal processing load. The second MCU 203's direct control of the ultrasonic transmission drive circuit 2052 and its unbuffered connection to the receive signal chain ensure that the end-to-end delay from ultrasonic transmission to echo processing is controlled within a single cycle. The fixed-point connection between the functional circuit modules of the probe 205 (transducer 2051, ultrasonic transmission drive circuit 2052, ultrasonic signal receiving circuit 2053, and signal filtering and amplification circuit 2054) and the second MCU 203 forms a closed-loop control circuit, avoiding the risk of instability in open-loop systems.

[0035] like Figure 3 As shown, in this embodiment, the host circuit further includes a Bluetooth module 208 and an audio module 209. The Bluetooth module 208 and the audio module 209 are each electrically connected to the second power module 201 and the second MCU 203. The Bluetooth module 208 is directly connected to the second MCU 203, enabling simultaneous transmission of measurement data to the display screen 100 (primary link) and the mobile terminal (auxiliary link). This enables synchronized display of data on the user side (display screen 100) and other terminals (family members' mobile phone apps), meeting the dual needs of clinical monitoring and patient self-testing. The audio module 209 receives the Doppler frequency shift signal processed by the second MCU 203, converts it into audible audio pulses based on the fetal heart rate (50-210 bpm), and outputs rhythmic fetal heart sounds through speakers / headphones, providing intuitive auditory feedback in addition to the waveform. The audio module 209 can also be used to output alarm signals.

[0036] like Figure 3As shown, in this embodiment, the first wireless module 102 and / or the second wireless module 202 utilize at least one of a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module, and an ultrasonic transmission module. The first wireless module 102 and / or the second wireless module 202 may utilize a single wireless transmission module design or multiple wireless transmission module designs. A wireless radio frequency module (e.g., 2.4 GHz) is suitable for open-space data transmission. An infrared / optical communication module is suitable for providing an anti-interference link in environments with strong electromagnetic interference (e.g., an operating room). An ultrasonic module is suitable for maintaining communication underwater or in liquid media (e.g., in a birthing pool).

[0037] like Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, in this embodiment, the host 200 includes a host front housing 210, and the display 100 includes a display rear housing 109. A first magnetic module 107 is provided on the inner wall of the display rear housing 109, and a second magnetic module 207 is provided on the inner wall of the host front housing 210. Through magnet-to-magnet attraction, the host 200 and display 100 can be quickly aligned and secured, simplifying the user experience. Pregnant women can easily assemble and detach the device with one hand, making it particularly suitable for those with limited mobility during mid- and late-pregnancy. Compared to traditional snap-on or plug-in connections, the magnetic method eliminates physical friction and prevents the connection from loosening due to wear and tear over time, improving device reliability. With its advantages of fast attachment, secure connection, and no directional restrictions, the magnetic method effectively addresses the issues of cumbersome operation, easy detachment, and wear associated with traditional split fetal heart rate monitors, significantly improving user experience and device durability. Optionally, the magnetic attraction force is optimized to ensure a secure fit (preventing separation when not monitoring) while allowing for easy detachment with minimal force, avoiding damage caused by forceful pulling. Alternatively, if a circular or multi-point symmetrical magnet layout is employed, the display screen 100 can be rotated 360° for attachment, adapting to viewing requirements at different angles (e.g., landscape / portrait display). Alternatively, a first magnetic attraction module 107 is provided on the inner wall of the display screen rear housing 109, enabling the display screen rear housing 109 to be magnetically attached to any magnet or ferromagnetic metal object, allowing for intuitive viewing of the display screen 100 while keeping both hands free.

[0038] like Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, in this embodiment, a chimeric structure 300 is provided between the host 200 and the display screen 100 for achieving a surface-fit connection by embedding. The chimeric structure 300 uses magnetic attraction to achieve a fixed positioning connection between the host 200 and the display screen 100. A chimeric structure 300 is added between the host 200 and the display screen 100 to achieve preliminary surface alignment of the host and the display screen; the magnetic force of the magnetic attraction method is used to enhance the stability of the connection; the concave and convex structure of the chimeric structure 300 can guide users to align quickly, significantly improving assembly efficiency; after being engaged, magnetic adsorption makes the connection tighter, preventing dislocation or falling off due to external forces (such as slight collisions); the pure magnetic attraction structure is prone to sliding when subjected to lateral force, while the chimeric structure can resist torsional force through physical limitation, ensuring that the connection between the host 200 and the display screen 100 is not easy to loosen; the chimeric surface increases the contact area to avoid deformation or damage to the shell caused by concentrated force during magnetic attraction; the "clicking feeling" of the chimeric structure 300 prompts the user that the connection is successful, making up for the defect of pure magnetic attraction without tactile feedback; compared with pure magnetic attraction, which may cause unstable connection due to magnetic attenuation after long-term use, the mechanical limitation of the chimeric structure can provide long-term stability. The interlocking magnetic structure solves the pain points of pure magnetic structures, such as difficult alignment and unstable connection, while retaining the flexibility of wireless split devices through the collaborative design of mechanical limitation and magnetic enhancement. It is particularly suitable for medical monitoring scenarios that require frequent disassembly and assembly and high reliability requirements, and can effectively improve user experience, structural strength and long-term durability.

[0039] like Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, in this embodiment, the interlocking structure 300 includes a first concave surface 301 provided on the outer wall of the display screen rear housing 109 and a second convex surface 302 provided on the outer wall of the main body front housing 210. The first magnetic module 107 on the inner wall of the display screen rear housing 109 is arranged in an inner-outer correspondence with the first concave surface 301, and the second magnetic module 207 on the inner wall of the main body front housing 210 is arranged in an inner-outer correspondence with the second convex surface 302. The concave-convex interlocking structure and the spatially corresponding layout of the magnetic components achieve a synergistic enhancement effect of mechanical positioning and electromagnetic attraction. The first concave surface 301 and the second convex surface 302 cooperate to form a mechanical guide structure, providing physical positioning in the X / Y axis plane. The corresponding arrangement of magnets inside and outside (e.g., the first magnetic module 107 is provided on the inner side of the first concave surface 301, and the second magnetic module 207 is provided on the inner side of the second convex surface 302) generates a magnetic attraction force in the Z-axis direction, forming a three-dimensional positioning network in a spatial rectangular coordinate system. In addition, the concave inner magnet and the convex outer magnet form a closed magnetic circuit.

[0040] like Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, in this embodiment, the magnetic attraction positions between the host 200 and the display screen 100 are respectively located near the bottom of the display screen rear shell 109 and near the top of the host front shell 210. The magnetic component of the display screen 100 is located near the bottom of the display screen rear shell 109, and the magnetic component of the host 200 is located near the top of the host front shell 210. They are asymmetrically arranged above and below, and the magnetic points deviate from their respective geometric centers, forming an upper and lower staggered adsorption; the display screen 100 naturally droops under the action of gravity, so that the magnetic surface and the host 200 fit more closely, and the resistance to accidental detachment when subjected to external force is improved; after adsorption, the display screen 100 automatically tilts, especially when adsorbed on surrounding magnetic objects, in line with the optimal viewing angle of the human eye (top-down angle), reducing the user's neck bending range and reducing the risk of fatigue; one-handed operation is more convenient, and the difficulty of separation operation is reduced, which is in line with the hand strength characteristics of pregnant women; make full use of the top space of the host 200 and the bottom space of the display screen 100, and free up the middle space of the device to accommodate more functional accessories (such as batteries, sensor probes, processors, etc.); heat source components (such as processors) can be arranged in the non-magnetic area to avoid high-temperature demagnetization of the magnet. Through clever magnetic point planning, without adding additional components, the three core goals of improving connection stability, optimizing human-computer interaction, and improving space utilization are simultaneously achieved. It is particularly suitable for health monitoring equipment that needs to balance medical reliability and home convenience.

[0041] like Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, in this embodiment, the mainframe front shell 210 and the mainframe rear shell 211 are fastened and fixed by an oblique-angled U-shaped buckle 403 and a convex rib 404; there are multiple oblique-angled U-shaped buckles 403, and the multiple oblique-angled U-shaped buckles 403 are arranged at intervals; the oblique-angled U-shaped buckles 403 and the convex rib 404 are arranged in a one-to-one correspondence. The closed ring structure and oblique-angle design of the oblique-angled U-shaped buckle 403 form a multi-directional constraint, so that the mainframe front shell 210 and the mainframe rear shell 211 are evenly distributed in force when connected, avoiding the unidirectional stress concentration problem of traditional straight-line buckles; the oblique-angled structure of the oblique-angled U-shaped buckle 403 produces a progressive guiding effect during the fastening process, reducing assembly resistance, while ensuring the precise alignment of the convex rib 404 and the oblique-angled U-shaped buckle 403, improving the success rate of one-time assembly; multiple oblique-angled U-shaped buckles 403 arranged at intervals form a matrix support point, by dispersing external impact loads, the anti-drop and anti-twisting capabilities of the shell joints are significantly enhanced; the closed ring buckle structure of the oblique U-shaped buckle 403 and the corresponding rib 404 continuously bite into each other, forming a continuous closed loop on the joint surface, effectively blocking the dust / liquid penetration path, and having a better sealing effect than discrete buckles; the "one-to-one positioning" design of the oblique U-shaped buckle 403 and the rib 404 eliminates the accumulation of assembly tolerances, prevents the main shell of the host from loosening and making abnormal noises after long-term use, and extends the service life of the overall structure.

[0042] like Figure 6As shown, in this embodiment, the host PCBA includes a button mainboard 216 and a charging port mainboard 217, the probe 205 includes a probe mainboard 218 and a transducer 219, and the snap-fit assembly host unit also includes a speaker and a host magnet 220; the host magnet 220, the speaker, the host power supply 215, the button mainboard 216, the charging port mainboard 217 and the probe 205 are arranged in sequence from top to bottom in the inner cavity of the host shell assembly; the host magnet 220, the speaker, the host power supply 215, the button mainboard 216, the charging port mainboard 217 and the probe mainboard 218 are all assembled in the inner cavity of the host shell assembly by snap-fit assembly. Each functional component (host magnet 220, speaker, host power supply 215, host PCBA, and probe 205) is arranged vertically and spaced apart, with a snap-on fastening method, achieving efficient three-dimensional space utilization and significantly improving the internal space compression ratio of the housing. The host magnet 220 and the electronic mainboards (button mainboard 216, charging port mainboard 217, and probe mainboard 218) are arranged in an isolated top-down manner. This effectively reduces magnetic field interference with sensitive circuits through the dual effects of distance attenuation and physical isolation. The speaker is located on the upper layer, near the sound outlet of the housing. The snap-on fastening ensures consistent vibration coupling between the sound unit and the housing, avoiding the sound energy loss caused by traditional screw fastening. The host power supply 215 is centrally located, forming a convection heat dissipation channel with the upper magnetic structure and the lower electronic mainboard. The snap-on connection maintains the necessary clearance, which is superior to the heat accumulation caused by excessive constraints caused by screw fastening. The independent snap-on positioning of each component layer eliminates the error accumulation caused by traditional serial assembly and ensures the final assembly accuracy of precision components such as the probe 205. The modular layered design allows for the individual removal and replacement of faulty components without disassembly, improving maintenance efficiency.

[0043] like Figure 6 and Figure 8As shown, in this embodiment, the host magnet 220 is assembled and fixed in the corresponding slot 401 on the upper part of the host front shell 210; the speaker is assembled and fixed in the corresponding slot 401 of the host rear shell 211, and the speaker is limited in the slot 401 of the host rear shell 211 by the top column 402 of the host front shell 210; the host power supply 215 is assembled and fixed in the corresponding slot 401 of the host rear shell 211, and the host power supply 215 is limited in the slot 401 of the host rear shell 211 by the top column 402 of the host front shell 210; the button mainboard 216 is also assembled in the host front shell 210. 10 and the corresponding slot 401 of the host rear shell 211; the charging port motherboard 217 is simultaneously assembled in the corresponding slot 401 of the host front shell 210 and the corresponding slot 401 of the host rear shell 211; the probe motherboard 218 is fixed to the host inner cover 213 via a first buckle 405; the measuring end of the probe 205 is arranged toward the host outer cover 214 and sealed within the cavity enclosed by the host outer cover 214 and the host inner cover 213, with the measuring end of the probe 205 located on the side of the host inner cover 213 facing the host outer cover 214. Preferably, the host outer cover 214 is fixed to the outer side of the host inner cover 213 by an interference fit of a first rib 406 on its inner side. The inner cover 213 is provided with a second rib 407 on its inner side, and a first groove 408 is provided on the bottom of the host front shell 210 and the host rear shell 211, which engages with the second rib 407. The speaker and power supply 215 utilize a single housing (rear housing 211) with a slot 401 for fixation and a top post 402 for position limiting, ensuring precise positioning of the core components along the X, Y, and Z axes. The power supply 215's slot 401 and the top post 402 for position limiting are designed to resist mechanical shock. The speaker is secured by a composite structure between the top post 402 of the front housing and the slot 401 of the rear housing 211, creating an acoustic vibration damping structure that reduces resonant distortion. The button board 216 and charging port board 217 utilize a dual housing (front housing 210 and rear housing 211) for coordinated locking, eliminating the risk of board deflection. The charging port board 217 is secured by a dual housing (front housing 210 and rear housing 211), creating a Faraday cage effect through the slot 401. The button board 216 is secured by a dual housing (front housing 210 and rear housing 211) to ensure consistent touch feedback. The rigid fit of the probe mainboard 218 and the main unit inner cover 213 blocks the transmission path of the ultrasonic transducer (transducer plate 219)'s vibrations to the various housings. The dedicated positioning of the main unit magnet 220 within the corresponding slot 401 on the main unit front housing 210 creates a directional magnetic field shielding zone, reducing interference with the underlying electronic boards. The packaging design of the probe 205, with the measuring end facing the main unit outer cover 214, further protects the probe 205.

[0044] like Figure 6 and Figure 8As shown, in this embodiment, the host button 2161 is fixed to the host front shell 210 through the cantilever 2162, and the host button 2161 is connected to the button main board 216; the host dust plug 212 is connected to the host rear shell 211 through a snap, and the host dust plug 212 is used to cover the second charging module 206; the transducer 219 is fixed to the host inner cover 213 by gluing, and the probe main board 218 is connected to the transducer 219. The host button 2161 adopts a cantilever 2162 button design. While maintaining touch sensitivity, the cantilever 2162 structure ensures the pressing life and the key stroke consistency deviation is smaller. The snap connection of the host dust plug 212 can be operated with one hand and ensures that more plug-in and unplug cycles can be completed. The adhesive fixation of the transducer 219 forms an acoustic impedance matching layer, which improves the transmission efficiency of the ultrasonic echo signal. The probe mainboard 218 and the transducer plate 219 are relatively fixed in position by the rigidity of the host inner cover 213 . The probe mainboard 218 and the transducer plate 219 are stably electrically connected to ensure stable impedance of the signal transmission path.

[0045] like Figure 6 As shown, in this embodiment, the display screen 100 includes a front display housing 108 and a rear display housing 109, with the rear display housing 109 connected to the front display housing 108 via a snap-fit connection. The snap-fit connection between the front display housing 108 and the rear display housing 109 forms a unified assembly process with the host 200, shortening the assembly time of the entire device. Optionally, the snap-fit connection between the front display housing 108 and the rear display housing 109 can also be secured by snapping together an angled U-shaped snap 403 and a rib 404. The modular design supports parallel assembly of the display screen 100 and the host 200, improving production line efficiency. The standardized snap-fit interface design of the display screen 100 supports rapid upgrades and replacements of the display screen 100. The snap-fit structure of the display screen 100 complements the host 200 mechanically. The display screen 100 and the host 200 are connected magnetically and communicate with each other wirelessly. The display screen 100 can be removed and replaced independently of the host 200, making it easier to replace, maintain, and use than traditional integrated devices.

[0046] During implementation, a split-type ultrasonic fetal heart monitor is provided, which is equipped with a vibration sensor 104. By shaking the display screen 100, the display screen can be turned on and illuminated, reducing the number of buttons on the display screen 100, lowering production costs, and providing a good user experience. By providing a three-axis sensor 204, the posture of the handheld probe 205 can be monitored when a pregnant woman is performing fetal heart monitoring, and an early warning prompt can be issued if the posture is incorrect, thereby avoiding measurement data errors caused by improper posture. A wireless signal terminal is provided, and when the probe 205 is in operation, it can wirelessly transmit the fetal heart signal to the wireless signal receiving terminal of the display screen 100, thereby receiving the fetal heart value in real time. By setting the display screen 100 to a power-saving mode, power can be saved and the working time of the lithium battery can be increased.

[0047] The split-type ultrasonic fetal heart monitor includes a host circuit and a display circuit.

[0048] Host circuit: 1. The charging module of the host circuit charges the lithium battery (used when the battery is low); 2. After the host 200 is powered on, the second power module 201 activates and supplies power to the second wireless module 202, the Bluetooth module 208, the three-axis sensor 204 (gyroscope), the audio module 209, and the signal transmission and reception module (ultrasonic wave transmission drive circuit 2052 and ultrasonic wave signal receiving circuit 2053). The second wireless module 202 uses radio frequency signals in the 2.4 GHz ISM band. The second wireless module 202 can also use infrared light pulse transmission, optical communication transmission, ultrasonic transmission, and other methods.

[0049] 3. After the host 200 is powered on, the second MCU 203 initiates ultrasonic transmission of a 3MHz PWM signal to the signal transmission module (ultrasonic transmission drive circuit 2052 and ultrasonic signal receiving circuit 2053), driving the transducer 2051. Transducer 2051 utilizes a piezoelectric ceramic transducer with a resonant frequency of 3MHz. Its operating principle is based on the conversion between electrical energy and mechanical energy (or acoustic energy), primarily through the piezoelectric effect. The signal receiving and processing module (ultrasonic signal receiving circuit 2053) receives and amplifies the signal received by transducer 2051 (signal filtering and amplification circuit 2054) and transmits it back to the second MCU 203 for data processing. The processed fetal heart rate data from the second MCU 203 is transmitted to the first wireless module 102 of the display screen 100 via the second wireless module 202. The display module 105 displays the current fetal heart rate data. Simultaneously, the audio signal processed by the second MCU 203 is output through the audio module 209 and the speaker. Alternatively, the data can be transmitted to a mobile app via Bluetooth module 208 for display of the fetal heart rate data.

[0050] The function of the three-axis sensor 204 is that during the fetal heart rate test, new pregnant mothers tend to move the fetal heart monitor frequently, making it difficult to find the fetal heart rate. The three-axis sensor 204 can simultaneously measure the position offset of the object in the X, Y, and Z directions. When the three-axis sensor 204 detects data changes, it reminds the pregnant mother.

[0051] Display screen circuit: 1. The charging module charges the lithium battery (used when the battery is low); 2. After the battery is installed, the first power module 101 is started to supply power to the display module 105, the first wireless module 102, the vibration sensor 104 and the first MCU 103 of the display screen circuit.

[0052] 3. After the display screen 100 is powered on, the first MCU 103 receives data from the host 200 via the first wireless module 102 (the wireless module uses radio frequency signals in the 2.4 GHz ISM band; the first wireless module 102 can also use infrared light pulse transmission, optical communication transmission, ultrasonic transmission, etc.). If the host 200 is not powered on, the display screen 100 enters power saving mode, which turns off the display screen 100 (display module 105), puts the first MCU 103 into shutdown mode, and puts the first wireless module 102 into low-power mode (inoperative). The vibration sensor 104 uses a commercially available vibration switch.

[0053] 4. In order to wake up the display screen 100 from the power saving mode, shake the display screen 100 so that the vibration sensor 104 starts working. The vibration sensor 104 sends a pulse signal to the first MCU 103 of the display screen circuit, waking up the first MCU 103 of the display screen circuit and putting it into working state. After the first MCU 103 of the display screen circuit is started, the entire display screen 100 is in working state.

[0054] A vibration sensor 104 is provided on the display circuit board. When the host 200 is turned on, the display 100 can be turned on and illuminated by shaking it, which reduces the number of buttons on the display 100, reduces production costs, and provides a good user experience. A three-axis sensor 204 is provided on the probe main board 218, which can monitor the posture of the handheld probe 205 when a pregnant woman is performing fetal heart monitoring and issue an early warning prompt when the posture is inappropriate, thereby avoiding measurement data errors caused by improper posture.

[0055] The probe main board 218 is also provided with a wireless signal output terminal, and the display circuit board is provided with a wireless signal receiving terminal. When the probe is working, it can transmit the fetal heart signal to the display wireless signal receiving terminal by wireless means, and receive the fetal heart value in real time; The probe main board 218 is also provided with a Bluetooth output terminal, which can be connected to a mobile terminal via Bluetooth.

[0056] The power saving mode logic of the display screen 100: In normal mode, the display screen 100 is powered by the lithium battery. At this time, the first wireless module 102, display module 105, vibration sensor 104, and first power module 101 are all in normal working mode, and the current of the first wireless module 102 is 27mA. The first MCU 103 continuously receives signals from the second wireless module 202 of the host 200 through the first wireless module 102. If there is no working signal within 4 seconds, the first MCU 103 will control the display screen 100 to enter power saving mode. At this time, the first wireless module 102 of the display screen 100 is in low power consumption mode with a current of 9.5uA. The first MCU 103 is in low power consumption mode, the display screen 100 is not operating, and the first power module 101 and vibration sensor 104 operate normally. If the user accidentally touches and shakes the display screen 100 in power saving mode, the first MCU 103 will wake up and start the first wireless module 102. The first MCU 103 will not receive the working signal from the host 200 and enter power saving mode again. This cycle continues until the host 200 and its probe 205 begin to operate.

[0057] Technical effects of split circuit board design: Separating the display circuit from the host circuit can save host circuit memory and free up more space to develop better algorithms on the host 200, centrally optimize computing power, reduce host circuit heat generation, and improve host 200 performance.

[0058] In practice, a split-type ultrasonic fetal heart monitor is provided. It uses a magnetically attached split structure, magnetically combining a main unit 200 and a display screen 100. The fetal heart signal from the main unit 200 is wirelessly transmitted to the display screen 100 for display. The display screen 100 is completely separate from the probe 205 of the main unit 200 and supports wireless connection. Users can hold the display screen 100 or place it anywhere to view real-time data, avoiding fatigue caused by looking down at data for long periods of time and the inconvenience of operation during mid- and late pregnancy.

[0059] Through the split design of the split host probe and the smart handheld display 100, the data collection and interaction functions are physically separated. Combined with multimodal interaction and efficient energy management, it systematically solves the problems of operating fatigue and low data interaction efficiency of traditional fetal heart monitors, while improving the accuracy and comfort of user self-monitoring, providing an innovative tool for home prenatal monitoring.

[0060] The split-type ultrasonic fetal heart monitor consists of a main unit 200 and a display screen 100, which can be disassembled and assembled magnetically. The display screen 100 comprises a rear housing 109 and a front housing 108 connected by snaps. The rear housing 109 secures a first magnetic module 107 and a display dust plug 111 (a protective cover for the first charging module 106) to the rear housing 109. A first slot 401 is provided on the rear housing 109 for securing the first magnetic module 107. A first environmentally friendly adhesive layer surrounds the first magnetic module 107 and the inner walls of the first slot 401 to secure the magnet. A first concave surface 301 is provided on the outer side of the rear housing 109, corresponding to the position of the first magnetic module 107, which mates with the curved surface of the main housing. The main unit 200 comprises a rear housing 211 and a front housing 210 connected thereto via snap-fits. A second slot 401 for securing the second magnetic module 207 is located within the front housing 210, corresponding to the first concave surface 301. A second environmentally friendly adhesive layer surrounds the second magnetic module 207 and the inner walls of the second slot 401, securing the magnet. A magnetic surface (second convex surface 302) is located within the front housing 210, corresponding to the first concave surface 301, for magnetic attachment to the first concave surface 301.

[0061] During implementation, a split-type ultrasonic fetal heart monitor is provided, which has a snap-on assembly structure. The front shell 108 of the display screen, the rear shell 109 of the display screen, the front shell 210 of the host, the rear shell 211 of the host, the host magnet 220, the display magnet 110, the PCBA, etc. all adopt a snap-on assembly process. The entire machine is fixed without a single screw, and the production efficiency is high.

[0062] The host unit includes a host rear shell 211 and a host front shell 210 whose raised buckle connection belt is introduced into the oblique U-shaped buckle. Three groups of oblique U-shaped buckles 403 are provided on the host front shell 210, and three groups of convex ribs 404 corresponding to the oblique U-shaped buckles 403 are provided on the host rear shell 211. The oblique U-shaped buckles 403 are buckled and fixed with the convex ribs 404. A card slot 401 is provided on the host rear shell 211 to fix the speaker and host lithium battery (host power supply 215) and is limited by the top column 402 on the host front shell 210. A buckle is provided on the host front shell 210 to fix the host magnet 220 and install the host button 2161 by hot melt. The button mainboard 216 and the charging port mainboard 217 are limited and fixed by the card slots 401 on the host front shell 210 and the host rear shell 211. The host button 2161 is fixed to the host front shell 210 by a cantilever 2162. The host dust plug 212 is connected to the host rear shell 211 by a buckle. The probe mainboard 218 is fixed to the host inner cover 213 by a buckle. The transducer 219 connected to the probe mainboard 218 is fixed to the host inner cover 213 by gluing. The host outer cover 214 is connected to the host inner cover 213 by a buckle. The display screen 100 includes a display screen rear shell 109 and a display screen front shell 108 connected by buckles. The display screen rear shell 109 is fixed with a display screen magnet 110 and a display screen dust plug 111 by snaps. The display screen lithium battery (display screen power supply 112) is adhered to the bottom surface of the display screen rear shell 109 by double-sided tape. The display screen panel 113 is fixed to the display screen front shell 108 by 3M double-sided tape. The light guide column is installed in the hole of the display screen front shell 108 by interference fit. The display screen mainboard 114 is fixed to the display screen rear shell 109 by buckles and is connected to the display screen lithium battery (display screen power supply 112) by wires.

[0063] Matters not covered by the present invention are known technologies.

[0064] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0066] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A display screen wake-up method, characterized in that: The following steps are involved: S100, start power supply; S200, shaking the display screen to start the vibration sensor (104); S300, the vibration sensor (104) sends a pulse signal to the first MCU (103) of the display screen circuit, waking up the first MCU (103) of the display screen circuit and entering a working state; S400, after the first MCU (103) of the display screen circuit is started, the display screen is put into an operating state; S500: The display screen receives a data signal transmitted by the host via the first wireless module (102) and displays the signal.

2. The display screen wake-up method according to claim 1, characterized in that: Add the following steps after step S400: S600: The vibration sensor (104) does not send a new pulse signal to the first MCU (103) of the display screen circuit for a predetermined period of time, and the first MCU (103) does not receive a data signal transmitted from the host. The first MCU (103) is in a low power consumption mode and controls the display screen to be in an inoperative state.

3. The display screen wake-up method according to claim 2, characterized in that: After the power supply is started in step S100, the first power module (101) and the vibration sensor (104) are both in a working state until the power is turned off and the operation stops.

4. A display screen awakened by the display screen awakening method according to any one of claims 1 to 3, characterized in that: include: A first power supply module (101), used for supplying power; A first wireless module (102) is used to establish a wireless connection with a host computer to receive a test data signal transmitted by the host computer; A first MCU (103) is used for real-time control, data processing, communication interaction and low power consumption management; A vibration sensor (104) is used to send a pulse signal to the first MCU (103) after being vibrated to wake up the first MCU (103) and put it into a working state; A display module (105), configured to display data information; The first power supply module (101) is electrically connected to the first wireless module (102), the first MCU (103), the vibration sensor (104) and the display module (105), respectively; the first MCU (103) is electrically connected to the first wireless module (102), the vibration sensor (104) and the display module (105), respectively.

5. An ultrasonic fetal heart rate measurement posture warning method, comprising the display screen wake-up method according to any one of claims 1 to 3, characterized in that: The following steps are involved: S10, turn on the host and start the power supply; S20, the second MCU (203) starts and drives the transducer (2051) to work; S30, the transducer (2051) transmits a test data signal back to the second MCU (203), the test data is processed by the second MCU (203), and then sent to the first wireless module (102) of the display screen via the second wireless module (202), the display screen displays the current test data, and at the same time, the audio signal processed by the second MCU (203) is output via the audio module; S40: During the operation of the transducer (2051), the position deviation of the transducer (2051) in the three directions of X, Y, and Z is simultaneously measured by the three-axis sensor (204), and an early warning is issued when the three-axis sensor (204) detects a change in the data.

6. The ultrasonic fetal heart rate measurement posture warning method according to claim 5, characterized in that: The transducer (2051) adopts a piezoelectric ceramic transducer, which is based on the mutual conversion between electrical energy and mechanical energy and / or acoustic energy through the piezoelectric effect; The ultrasonic signal receiving circuit (2053) amplifies the test data signal received by the transducer (2051) through the signal filtering and amplifying circuit (2054) and transmits the amplified signal back to the second MCU (203) for data processing.

7. The ultrasonic fetal heart rate measurement posture warning method according to claim 5, characterized in that: Step S30 also includes: transmitting the test data processed by the second MCU (203) to the mobile terminal via the Bluetooth module, and displaying the current test data via the mobile terminal.

8. A split-type ultrasonic fetal heart rate monitor, which uses the ultrasonic fetal heart rate measurement posture warning method according to any one of claims 5 to 7 to provide a measurement posture warning, characterized in that: The device comprises the display screen (100) according to claim 4 and a host (200), wherein the host (200) comprises: A second power supply module (201), used for supplying power; A second wireless module (202) is used to establish a wireless connection with the display screen (100) to transmit a test data signal to the display screen (100); A second MCU (203) is used for real-time control, data processing, communication interaction and low power consumption management; A three-axis sensor (204) is used to simultaneously measure position deviations in the three directions of X, Y, and Z; A probe (205) having a transducer (2051) for measuring; The second power supply module (201) is electrically connected to the second wireless module (202), the second MCU (203), the three-axis sensor (204), and the probe (205), respectively; the second MCU (203) is electrically connected to the second wireless module (202), the three-axis sensor (204), and the probe (205), respectively.

9. The split-type ultrasonic fetal heart monitor according to claim 8, characterized in that: The three-axis sensor (204) uses a gyroscope; and / or The first power module (101) and the second power module (201) use lithium batteries; and / or the transducer (2051) uses a piezoelectric ceramic transducer.

10. The split-type ultrasonic fetal heart monitor according to claim 8, characterized in that: The display screen (100) further comprises: a first charging module (106) for electrically connecting to the first power module (101) and for charging the first power module (101); and / or a first magnetic module (107) for magnetically connecting to the host; The host (200) further includes: a second charging module (206) for electrically connecting to the second power module (201) for charging the second power module (201); and / or a second magnetic module (207) for magnetically connecting to the first magnetic module (107) to achieve a magnetic connection between the display screen (100) and the host (200).

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