Display screen circuit, display screen unit and split type ultrasonic fetus-voice meter

Abstract

The utility model relates to the technical field of medical instruments, and discloses a display screen circuit, a display screen unit and a split type ultrasonic fetus-voice meter. The display screen circuit comprises a first power supply module, a first wireless module, a vibration sensor, a first MCU and a display module; the first power supply module is electrically connected with the first wireless module, the vibration sensor, the first MCU and the display module, and the first MCU is electrically connected with the first wireless module, the vibration sensor and the display module; after vibration is detected through the vibration sensor, pulse signals are sent to the first MCU, then the first MCU is awakened to enter a working state, and data signals are received through the first wireless module and then displayed through the display module. Through collaborative design of vibration sensing and wireless transmission, core performance indexes such as equipment awakening speed, data display real-time performance and the like are ensured while physical keys are cancelled, and unification of structure simplification and function optimization is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially, relate to a display screen circuit. In addition, the utility model still relates to a display screen unit including the display screen circuit of above, and including the display screen unit of above split type ultrasonic fetal heart instrument. BACKGROUND

[0002] The ultrasonic fetal heart instrument (Fetal Doppler) is a kind of medical equipment using ultrasonic technology to detect fetal heartbeat, mainly used for fetal heart monitoring during pregnancy, to help assess the health status of fetus.The ultrasonic fetal heart instrument is based on Doppler Effect, by probe emitting high-frequency ultrasonic wave (usually 2-5MHz), ultrasonic wave meets fetal heart and reflects back to probe, and the device calculates fetal heart rate (FHR, Fetal Heart Rate) by analyzing the frequency change of echo, and shows in digital or sound form.The ultrasonic fetal heart instrument is the most safe and popular fetal heart monitoring method, compared with traditional stethoscope, can detect fetal heart earlier (about 10 weeks of pregnancy), greatly improves the convenience and reliability of pregnancy monitoring.

[0003] The existing ultrasonic fetal heart instrument is mainly divided into two categories: medical large all-in-one machine and household portable all-in-one machine.The medical device is bulky and complex to operate;Although the household device is reduced in size, it generally adopts integrated design, which has the following inherent defects:

[0004] (1) The probe and the screen need to be held at the same time during use, the operation posture is limited, the user needs to look down to check the screen of the machine body, long-term use can easily cause cervical fatigue, and real-time data cannot be checked, and data checking often needs to interrupt monitoring;

[0005] (2) Physical keys are easy to be damaged due to frequent pressing, and it is difficult to increase waterproof design;

[0006] (3) The whole machine is inconvenient to disinfect, and the probe and electronic components cannot be separated and cleaned.Especially for pregnant women, the existing key wake-up mode is slow in response in emergency, and the success rate of wet hand operation is significantly reduced. INVENTION CONTENTS

[0007] The utility model provides a kind of display screen circuit, display screen unit and split type ultrasonic fetal heart instrument, by the collaborative design of vibration sensing and wireless transmission, while cancelling physical key, guarantee the core performance index such as device wake-up speed, data display real-time, realize the unity of structure simplification and function optimization, to solve the technical problems that the operation posture of existing ultrasonic fetal heart instrument is limited, physical key operation is inconvenient and easy to be damaged.

[0008] According to one aspect of the utility model, provide a display screen circuit, including first power module, first wireless module, vibration sensor, first MCU and display module, first power module is connected with first wireless module, vibration sensor, first MCU and display module respectively, first MCU is connected with first wireless module, vibration sensor and display module respectively, after the pulse signal is sent to first MCU through vibration sensor detection vibration, and then wake up first MCU enters working condition, and after receiving data signal through first wireless module, display through display module.

[0009] Further, the vibration sensor adopts a vibration switch.

[0010] According to another aspect of the utility model, a display screen unit is also provided, which is connected to a host unit by magnetic attraction and connected to the host unit for data signal by wireless communication, comprising the display screen circuit.

[0011] According to another aspect of the utility model, a split type ultrasonic fetal heart monitor is also provided, comprising the display screen unit and the host unit, the display screen unit is connected to the host unit by magnetic attraction and connected to the host unit for data signal by wireless communication.

[0012] Further, the host circuit further comprises a second power module, a second wireless module, a three-axis sensor, a transducer and a second MCU, the second power module is connected with the second wireless module, the three-axis sensor, the probe and the second MCU respectively, the second MCU is connected with the second wireless module, the three-axis sensor and the probe respectively, the position offset of the host unit in X, Y and Z directions in working condition is measured by the three-axis sensor.

[0013] Further, the probe comprises a transducer, an ultrasonic wave emission driving circuit, an ultrasonic wave signal receiving circuit and a signal filtering and amplifying circuit, the second MCU is connected to the transducer through the ultrasonic wave emission driving circuit, the transducer is connected to the second MCU through the ultrasonic wave signal receiving circuit and the signal filtering and amplifying circuit.

[0014] Further, the three-axis sensor adopts at least one of a gyroscope, an accelerometer and a three-axis magnetometer.

[0015] Further, the host circuit further comprises a Bluetooth module and an audio module, the Bluetooth module and the audio module are connected to the second power module respectively, and the Bluetooth module and the audio module are connected to the second MCU respectively.

[0016] Further, the first wireless module and / or the second wireless module adopts at least one of a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module and an ultrasonic wave transmission module.

[0017] Further, the transducer adopts a piezoelectric ceramic transducer.

[0018] The utility model has the following beneficial effects:

[0019] The display screen circuit is specially designed for the display unit of the split type ultrasonic fetal heart instrument, and thus separates the fetal heart measurement from the measurement data viewing. The vibration sensor directly detects the user operation action (shaking) to generate a pulse signal to trigger the first MCU to wake up, realizing the keyless wake-up function, and completely eliminating the physical key structure, solving the problems of easy damage and poor waterproofness of the traditional key. As the only detection unit in normal power state, the first MCU, the first wireless module and the display module are in sleep state, which significantly reduces the standby power consumption of the display screen and prolongs the equipment endurance time. The direct connection architecture of vibration signal, MCU wake-up, wireless communication and display output realizes the millisecond-level fast response from vibration detection to display, which is superior to the traditional key wake-up scheme. The first MCU realizes electrical isolation control of the functional modules (the first power module, the first wireless module, the vibration sensor and the display module), improves the circuit reliability, and the single module failure does not affect the overall function operation. The first wireless module directly interacts with the first MCU, ensuring the real-time transmission of the measurement data from the probe to the display screen without display delay. The display screen circuit of the utility model, through the cooperative design of vibration sensing and wireless transmission, cancels the physical key while ensuring the device wake-up speed, data display real-time performance and other core performance indicators, realizing the unification of structure simplification and function optimization.

[0020] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings that form a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0022] Figure 1 is a structure schematic view of the display screen circuit of the preferred embodiment of the utility model;

[0023] Figure 2 is a circuit structure schematic view of the split type ultrasonic fetal heart instrument of the preferred embodiment of the utility model.

[0024] Legend:

[0025] 100, first power module; 200, first wireless module; 300, vibration sensor; 400, first MCU; 500, display module; 600, second power module; 700, second wireless module; 800, three-axis sensor; 900, probe; 901, transducer; 902, ultrasonic wave emission drive circuit; 903, ultrasonic wave signal receiving circuit; 904, signal filtering and amplifying circuit; 1000, second MCU; 1100, Bluetooth module; 1200, audio module. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered below.

[0027] Figure 1 is a structural schematic view of the display screen circuit of the preferred embodiment of the present application; Figure 2 is a circuit structure schematic view of the split type ultrasonic fetal heart instrument of the preferred embodiment of the present application.

[0028] As Figure 1The display screen circuit of the utility model, special for the display unit of split type ultrasonic fetal heart instrument, is independently designed, and then the fetal heart measurement and the measurement data checking are separated. The vibration sensor 300 directly detects the user operation action (shaking), generates a pulse signal to trigger the first MCU 400 to wake up, realizes the keyless wake-up function, and completely cancels the physical key structure, solves the problems of easy damage and poor waterproofness of the traditional key. The vibration sensor 300 is the only detection unit working with constant electricity, and the first MCU 400, the first wireless module 200 and the display module 500 are in the sleep state, which significantly reduces the standby power consumption of the display screen and prolongs the equipment endurance time. The direct connection architecture of vibration signal, MCU wake-up, wireless communication and display output realizes the millisecond-level fast response from vibration detection to display, which is better than the traditional key wake-up scheme. The function modules (the first power module 100, the first wireless module 200, the vibration sensor 300 and the display module 500) realize electrical isolation control through the first MCU 400, improve the circuit reliability, and the single module fault does not affect the overall function operation. The first wireless module 200 and the first MCU 400 directly interact with data, ensure the real-time transmission of the measurement data from the probe 900 to the display screen, and have no display delay. The display screen circuit of the utility model, through the cooperative design of vibration sensing and wireless transmission, cancels the physical key while ensuring the device wake-up speed, data display real-time performance and other core performance indicators, realizes the unification of structure simplification and function optimization. MCU (Microcontroller Unit) is a microcomputer system integrating CPU, memory, counter and various peripheral interfaces (such as USB, A / D conversion, UART, etc.) on a single chip, and its core features include high integration, low power consumption and low cost.

[0029] As Figure 1As shown, in this embodiment, the vibration sensor 300 uses a vibration switch. When using a vibration switch as the vibration sensor 300, the vibration switch is a purely mechanical structure (without static current), only conducting during vibration, and does not consume additional power. Compared with MEMS sensors (microelectromechanical systems, which are functional devices that realize the sensing and signal processing of microelectromechanical systems), it achieves true zero-power detection, significantly extending the device's battery life. The vibration switch directly outputs high / low level pulses when it is turned on, without the need for signal conditioning circuits, and can be directly connected to the external interrupt pin of the first MCU400. The wake-up delay is extremely low, ensuring the real-time response of the first MCU400 from sleep. The vibration switch is a mechanical contact switch, which is not sensitive to micro-vibrations (it needs to reach a threshold acceleration to trigger), avoiding false wake-ups. In complex motion scenarios (such as carrying and walking), the false trigger rate is significantly lower than that of the analog vibration sensor 300. The structure is simple, requiring no calibration or complex signal processing, reducing costs, and its shock resistance and temperature stability are superior to MEMS sensors. The vibration switch can only detect the presence or absence of vibration, and cannot sense the direction / intensity of vibration, making it suitable for binary triggering scenarios (such as wake-up / sleep switching). Vibration switches, with their advantages of low power consumption (even zero power consumption), high reliability, and low cost, perfectly match the basic requirements of "vibration to wake up the display".

[0030] like Figure 1 As shown, the display unit in this embodiment is used to connect to the host unit via magnetic attraction and to connect to the host unit via wireless communication, including the aforementioned display circuit. The display unit employs a collaborative design of magnetic attraction and wireless communication. The magnetic structure provides physical adsorption force, eliminating the need for plugging and unplugging interfaces, enabling quick and accurate interconnection or separation from the host unit. It allows for immediate installation / removal with one hand, while avoiding problems such as wear and tear on mechanical interfaces. The display unit and host unit are remotely and automatically connected via a wireless module, allowing the display unit to continue displaying data even after being detached from the host. The display unit can be placed in any nearby location, and can even be stably magnetically attached to any nearby magnetic metal for easy observation of the data displayed. The interface-free design (pure magnetic attraction + wireless), combined with the low-power characteristics of the display circuit, achieves a certain level of waterproof protection, making it suitable for humid / disinfection scenarios. Through the collaborative cooperation of magnetic attraction and wireless communication, reliable connection is ensured while achieving device flexibility.

[0031] like Figure 2As shown, the split type ultrasonic fetal heart instrument of the embodiment includes the display screen unit and the host unit, the display screen unit is connected with the host unit in a magnetic suction mode, and is connected with the host unit in a data signal connection through a wireless communication mode. The magnetic suction structure realizes single-hand quick alignment and adsorption of the host unit and the probe and the display screen unit, without plugging or calibration; in use, the display screen unit can be quickly taken off from the host unit, and the display screen visual angle can be quickly switched (such as adsorbed on a bed guardrail, a metal table top, a mobile phone support, or handheld operation), and the single detection time is shortened. The wireless communication can still automatically maintain the data link remotely when the magnetic suction is disconnected. The cooperative design of the magnetic suction without a physical interface and the wireless allows the host unit to be integrally packaged in a medical silica gel sleeve, and the display screen unit and the host unit can be sterilized (such as alcohol wiping / ultraviolet irradiation) respectively, and the cross infection risk is reduced. Through the cooperative optimization of the magnetic suction and the wireless technology, the operation convenience, the multi-scene adaptability and the hospital infection control ability of the fetal heart detection are significantly improved on the premise of maintaining the medical level reliability, and the split type ultrasonic fetal heart instrument is especially suitable for obstetric clinics, delivery rooms and emergency transfer scenes.

[0032] As Figure 2As shown, in the embodiment, the host circuit further includes a second power module 600, a second wireless module 700, a three-axis sensor 800, a transducer 901, and a second MCU 1000; the second power module 600 is electrically connected to the second wireless module 700, the three-axis sensor 800, the probe 900, and the second MCU 1000 respectively, and the second MCU 1000 is electrically connected to the second wireless module 700, the three-axis sensor 800, and the probe 900 respectively; the position offset of the host unit in X, Y, and Z directions in the working state is measured by the three-axis sensor 800. The host circuit of the split type ultrasonic fetal heart instrument is controlled by the integrated three-axis sensor 800 and multiple modules, the three-axis sensor 800 monitors the displacement (X / Y / Z axis acceleration) and the inclination angle of the host unit in real time, the second MCU 1000 acquires the contact pressure change between the probe 900 and the measurement site, automatically corrects the ultrasonic echo signal attenuation caused by the user operation jitter or the breathing movement of the pregnant woman, and reduces the fetal heart rate detection error. The data of the three-axis sensor 800 is combined with the impedance feedback of the transducer 901, when it is detected that the probe 900 is inclined greater than a preset value or the pressure is insufficient, the second MCU 1000 controls the alarm (buzzer or warning light) to send a warning signal, or the second wireless module 700 can also send a real-time alarm prompt to the display screen unit, to avoid missed diagnosis. The host circuit integrates the three-axis sensor 800 and the second MCU 1000, realizes the three major breakthroughs of quality optimization, operation guidance, and motion analysis of fetal heart signals, makes the device still maintain the medical level detection performance in the dynamic environment, and meets the dual needs of low power consumption and real-time performance in the clinical scene. Optionally, the first power module 100 and / or the second power module 600 adopts a lithium battery. Optionally, the first power module 100 and / or the second power module 600 includes a charging module for charging the lithium battery.

[0033] As Figure 2As shown, in this embodiment, the probe 900 includes a transducer 901, an ultrasonic wave transmission drive circuit 902, an ultrasonic wave signal receiving circuit 903, and a signal filtering and amplification circuit 904. The second MCU 1000 is connected to the transducer 901 via the ultrasonic wave transmission drive circuit 902, and the transducer 901 is connected to the second MCU 1000 via the ultrasonic wave signal receiving circuit 903 and the signal filtering and amplification circuit 904. By directly driving the ultrasonic wave transmission drive circuit 902 through the second MCU 1000, precise control of the transmission frequency, pulse width, and power is achieved, ensuring that the ultrasonic wave penetration depth matches the fetal development stage. The direct connection architecture of transducer 901 → ultrasonic wave signal receiving circuit 903 → signal filtering and amplification circuit 904 → second MCU 1000 avoids signal relay loss and preserves the weak Doppler frequency shift characteristics in the original echo. The hierarchical processing design of the ultrasonic wave signal receiving circuit 903 and the signal filtering and amplification circuit 904 filters out high-frequency interference in the analog domain first, reducing the load on subsequent digital signal processing. The second MCU1000 directly controls the ultrasonic transmitting drive circuit 902, and its unbuffered connection to the receiving signal link ensures that the end-to-end delay from ultrasonic transmission to echo processing is controlled within one cycle. The fixed-point connection between the functional circuit modules of the probe 900 (transducer 901, ultrasonic transmitting drive circuit 902, ultrasonic signal receiving circuit 903, and signal filtering and amplification circuit 904) and the second MCU1000 forms a closed-loop control loop, avoiding the instability risks of open-loop systems.

[0034] like Figure 2 As shown, in this embodiment, the triaxial sensor 800 employs at least one of a gyroscope, an accelerometer, and a triaxial magnetometer. The gyroscope directly measures the rate of change of the host unit along the X / Y / Z axes, accurately capturing displacement changes caused by rotational jitter (such as slight wrist rotation) or other movements when the user holds the probe 900. The angular velocity data output by the gyroscope is used by the second MCU 1000 to obtain the instantaneous tilt angle change of the probe 900, providing a time-domain motion compensation reference for the ultrasonic echo signal, thereby issuing early warnings to eliminate Doppler signal phase distortion caused by sudden changes in the probe 900 angle.

[0035] like Figure 2As shown, in the embodiment, the host circuit further comprises a Bluetooth module 1100 and an audio module 1200, the Bluetooth module 1100 and the audio module 1200 are respectively electrically connected to the second power module 600, and the Bluetooth module 1100 and the audio module 1200 are respectively electrically connected to the second MCU 1000. The Bluetooth module 1100 is directly connected to the second MCU 1000, supports simultaneous transmission of measurement data to a display screen unit (main link) and a mobile terminal (auxiliary link), realizes synchronous display of data of a user end (display screen) and other ends (mobile phone APPs of family members, etc.), and meets dual requirements of clinical monitoring and patient self-measurement. The audio module 1200 receives a Doppler shift signal processed by the second MCU 1000, converts the Doppler shift signal into audible audio pulses according to a fetal heart rate (50-210bpm), outputs rhythmic fetal heart sounds through a loudspeaker / earphone, and provides intuitive auditory feedback in addition to a waveform. The audio module 1200 can also be used to output an alarm signal.

[0036] As shown in FIG. 1, in the embodiment, the first wireless module 200 and / or the second wireless module 700 adopt at least one of a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module, and an ultrasonic wave transmission module. Figure 2 As shown in FIG. 1, in the embodiment, the first wireless module 200 and / or the second wireless module 700 adopt at least one of a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module, and an ultrasonic wave transmission module. The first wireless module 200 and / or the second wireless module 700 can select a design of one wireless transmission module, or a design of multiple wireless transmission modules. The wireless radio frequency module (such as 2.4GHz) is suitable for data transmission in an open space. The infrared / optical communication module is suitable for providing an anti-interference link in a strong electromagnetic interference environment (such as an operating room). The ultrasonic wave module is suitable for maintaining communication in water or liquid medium (such as a delivery pool environment).

[0037] As shown in FIG. 1, in the embodiment, the first wireless module 200 and / or the second wireless module 700 adopt at least one of a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module, and an ultrasonic wave transmission module. Figure 2 As shown in FIG. 1, in the embodiment, the transducer 901 adopts a piezoelectric ceramic transducer. The piezoelectric ceramic has a high piezoelectric constant, realizes efficient conversion between electric energy and acoustic energy, has mechanical resonance characteristics, naturally forms a narrow bandpass characteristic of a center frequency ±5%, effectively suppresses wideband noise of abdominal wall tissue scattering, and improves a signal-to-noise ratio (SNR) of a fetal heart Doppler signal. The piezoelectric ceramic has a transient response time <0.1μs, supports short pulse excitation of an ultrasonic wave emission driving circuit 902, realizes lower axial resolution, and accurately distinguishes structures of chambers of a fetal heart. The piezoelectric ceramic has a high Curie point, has small sensitivity change in a body temperature range, and avoids attenuation of detection sensitivity caused by temperature drift when a pregnant woman's abdomen is contacted for a long time.

[0038] When performing fetal heart monitoring, the display screen unit can be separated from the main unit by single-handed operation, and the main unit is opened to start monitoring; when the monitoring is paused, the display screen unit enters the power saving mode, and the display module does not display data; when the display screen unit is shaken, the vibration sensor 300 detects the vibration and sends a pulse signal to the first MCU 400, thereby waking up the first MCU 400 to enter the working state, and displaying the data signal received by the first wireless module 200 through the display module 500.

[0039] In implementation, a display screen circuit, a display screen unit and a split type ultrasonic fetal heart monitor are provided, the vibration sensor 300 is arranged, the display screen unit can be turned on by shaking, the number of keys of the display screen unit is reduced, the production cost is reduced, and the user experience is good; the three-axis sensor 800 is arranged, the posture of the handheld probe 900 during fetal heart monitoring of the pregnant woman is monitored, and a warning prompt is given when the posture is improper, so that measurement data errors caused by improper posture can be avoided; the wireless signal end is arranged, when the probe 900 works, the fetal heart signal can be transmitted to the wireless signal receiving end of the display screen unit in a wireless manner, and the fetal heart value is received in real time. The power saving mode of the display screen unit can save power and increase the working time of the lithium battery.

[0040] The split type ultrasonic fetal heart monitor comprises a main circuit and a display screen circuit.

[0041] The main circuit comprises:

[0042] 1. The charging module of the main circuit charges the lithium battery (used when the battery power is insufficient);

[0043] 2. After the main unit is turned on, the second power module 600 is started to supply power to the second wireless module 700, the Bluetooth module 1100, the three-axis sensor 800 (gyroscope), the audio module 1200, and the signal transmitting and receiving module (ultrasonic wave transmitting driving circuit 902 and ultrasonic wave signal receiving circuit 903). The second wireless module 700 uses a 2.4GHz ISM frequency band radio frequency signal, and the second wireless module 700 can also use infrared light pulse transmission, optical communication transmission, ultrasonic wave transmission, etc.

[0044] 3、The host unit starts up, and the second MCU 1000 starts to send 3MHz PWM signals to the signal emitting module (ultrasonic wave emitting driving circuit 902, ultrasonic wave signal receiving circuit 903), driving the transducer 901 to work. The transducer 901 uses a piezoelectric ceramic transducer, whose resonance frequency is 3MHz. Its working principle is: based on the mutual conversion between electric energy and mechanical energy (or sound energy), mainly realized through piezoelectric effect. The signal receiving & processing module (ultrasonic wave signal receiving circuit 903) sends the signals received by the transducer 901 back to the second MCU 1000 for data processing after receiving amplification (signal filtering and amplification circuit 904). The fetal heart data processed by the second MCU 1000 is sent to the first wireless module 200 of the display screen unit, and the current test data of the fetal heart monitor is displayed through the display module 500. At the same time, the audio signal processed by the second MCU 1000 is output through the loudspeaker through the audio module 1200. In addition, the data can also be transmitted to the small program on the mobile phone end through the Bluetooth module 1100 to display the fetal heart data.

[0045] The role of the three-axis sensor 800 is to remind the pregnant mother when the data changes are monitored during the test of the fetal heart.

[0046] Display screen circuit:

[0047] 1. The charging module charges the lithium battery (used when the battery power is insufficient);

[0048] 2. After the battery is installed, the first power module 100 starts to supply power to the display module 500, the first wireless module 200, the vibration sensor 300, and the first MCU 400 of the display screen circuit.

[0049] 3. After the display screen unit is powered on, the first MCU 400 receives data from the host unit through the first wireless module 200 (wherein the wireless module uses 2.4GHz ISM frequency band radio frequency signals, and the first wireless module 200 can also use infrared light pulse transmission, optical communication transmission, ultrasonic wave transmission, etc.). If the host unit is not powered on, the display screen unit enters the power saving mode, which will turn off the display screen (display module 500), the first MCU 400 enters the shutdown mode, and the first wireless module 200 enters the low-power mode (not working). The vibration sensor 300 uses a market vibration switch.

[0050] 4. In order to wake up the display unit from the power saving mode, shake the display unit to make the vibration sensor 300 start working, the vibration sensor 300 sends a pulse signal to the first MCU 400 of the display circuit, wakes up the first MCU 400 of the display circuit to enter the working state, and the first MCU 400 of the display circuit starts the whole display unit to be in the working state.

[0051] The vibration sensor 300 is arranged on the display circuit board, and when the host unit key is turned on, the display unit can be turned on by shaking the display unit, thereby reducing the keys of the display unit, reducing the production cost, and providing good user experience.

[0052] The three-axis sensor 800 is arranged on the probe mainboard, which can monitor the posture of the handheld probe when the pregnant woman performs fetal heart monitoring, and give a warning prompt when the posture is improper, so as to avoid measurement data errors caused by improper posture.

[0053] The probe mainboard is also provided with a wireless signal output end, and the display circuit board is provided with a wireless signal receiving end, so that the probe can transmit the fetal heart signal to the display screen wireless signal receiving end in a wireless manner when working, and receive the fetal heart value in real time.

[0054] The probe mainboard is also provided with a Bluetooth output end, which can be connected with a mobile terminal Bluetooth.

[0055] The power saving mode logic of the display unit: in the normal mode, the lithium battery of the display unit supplies power, at this time, the first wireless module 200, the display screen (display module 500), the vibration sensor 300 and the first power module 100 are in the normal working mode, the current of the first wireless module 200 is 27mA. The first MCU 400 continuously receives the signal from the second wireless module 700 of the host unit from the first wireless module 200, if there is no working signal within 4s, the first MCU 400 will control the display unit to enter the power saving mode, at this time, the first wireless module 200 of the display unit is in the low power consumption mode, the current is 9.5uA, the first MCU 400 is in the low power consumption mode, the display unit does not work, the first power module 100 and the vibration sensor 300 work normally. If the user accidentally touches and shakes the display unit in the power saving mode, the first MCU 400 will be woken up, the first wireless module 200 will be started, the first MCU 400 does not receive the working signal of the host, and enters the power saving mode again, so as to cycle until the host unit and the probe 900 start working.

[0056] The technical effect of the split circuit board design: the display circuit and the host circuit are arranged separately, which can save the host circuit memory, release more space on the host to do better algorithm, optimize the computing power, reduce the heat of the host circuit, and improve the performance of the host.

[0057] The rest of the details are known technologies.

[0058] The technical features of the above embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0059] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

[0060] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display screen circuit, characterized in that, It includes a first power module (100), a first wireless module (200), a vibration sensor (300), a first MCU (400), and a display module (500); The first power module (100) is electrically connected to the first wireless module (200), the vibration sensor (300), the first MCU (400) and the display module (500), respectively. The first MCU (400) is electrically connected to the first wireless module (200), the vibration sensor (300) and the display module (500), respectively. After the vibration is detected by the vibration sensor (300), a pulse signal is sent to the first MCU (400), which wakes up the first MCU (400) and puts it into working state. After receiving the data signal through the first wireless module (200), the data is displayed through the display module (500).

2. The display circuit according to claim 1, characterized in that, The vibration sensor (300) uses a vibration switch.

3. A display screen unit for connecting to a host unit via magnetic attraction and for transmitting data signals to the host unit via wireless communication, characterized in that... Includes the display circuit as described in claim 1 or 2.

4. A split-type ultrasonic fetal heart monitor, characterized in that, It includes the display unit and the host unit as described in claim 3, wherein the display unit and the host unit are connected by magnetic attraction and are connected by wireless communication for data signal connection.

5. The split-type ultrasonic fetal heart monitor according to claim 4, characterized in that, It also includes a host circuit, which includes a second power module (600), a second wireless module (700), a triaxial sensor (800), a transducer (901), and a second MCU (1000). The second power module (600) is electrically connected to the second wireless module (700), the triaxial sensor (800), the probe (900), and the second MCU (1000), respectively. The second MCU (1000) is electrically connected to the second wireless module (700), the triaxial sensor (800), and the probe (900), respectively. The positional offset of the host unit in the X, Y, and Z directions during operation is measured using a triaxial sensor (800).

6. The split-type ultrasonic fetal heart monitor according to claim 5, characterized in that, The probe (900) includes a transducer (901), an ultrasonic transmitting drive circuit (902), an ultrasonic signal receiving circuit (903), and a signal filtering and amplification circuit (904). The second MCU (1000) is connected to the transducer (901) via the ultrasonic transmitting drive circuit (902), and the transducer (901) is connected to the second MCU (1000) via the ultrasonic signal receiving circuit (903) and the signal filtering and amplification circuit (904).

7. The split-type ultrasonic fetal heart monitor according to claim 5, characterized in that, The triaxial sensor (800) employs at least one of a gyroscope, an accelerometer, and a triaxial magnetometer.

8. The split-type ultrasonic fetal heart monitor according to any one of claims 5 to 7, characterized in that, The host circuit also includes a Bluetooth module (1100) and an audio module (1200), which are electrically connected to the second power module (600) and the second MCU (1000).

9. The split-type ultrasonic fetal heart monitor according to any one of claims 5 to 7, characterized in that, The first wireless module (200) and / or the second wireless module (700) employ at least one of the following: a wireless radio frequency transmission module, an infrared light pulse transmission module, an optical communication transmission module, and an ultrasonic transmission module.

10. The split-type ultrasonic fetal heart monitor according to any one of claims 5 to 7, characterized in that, The transducer (901) adopts a piezoelectric ceramic transducer.

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