An inductive fetal heart monitor

Abstract

The application provides an inductive fetal heart monitor, which comprises a fetal heart monitor body and a probe, wherein the fetal heart monitor body comprises a power module, a main control module, a signal source switching module, a grounding signal module and a fetal heart output module; the main control module is connected with the signal source switching module; the grounding signal module and the fetal heart output module are both connected with the signal source switching module; the probe comprises a probe body, a sensor one and a sensor two; the probe body is connected with the signal source switching module; the sensor one and the sensor two are arranged on the probe body; and the sensor one and the sensor two are both connected with the main control module. The two sensors and the signal source switching circuit are added to the probe, the signal source switching circuit is controlled by an MCU, the two signal sources of the signal source switching circuit, i.e. the fetal heart signal or the grounding signal, are switched and output, and the two sensors are used to solve the problems of reading and loud noise during the fetal heart searching process when the fetal heart monitor is not used correctly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fetal heart monitor, and particularly relates to an inductive fetal heart monitor. BACKGROUND

[0002] The fetal heart monitor is also called fetal heart rate monitor, which obtains the fetal heart movement information from the abdomen of a pregnant woman according to the Doppler principle, and is used to obtain the fetal heart movement condition, and mainly serves as an electronic instrument for monitoring the fetal heart rate, and provides the fetal heart movement information for the obstetrician to check whether the fetal movement is abnormal, and makes corresponding treatment according to the fetal heart movement condition.

[0003] At present, the fetal heart monitor on the market has two defects, one is that the power is turned on to enter the detection state, and when the fetal heart monitor probe is shaken or an object moves in the detection range of the probe, even if the fetal heart monitor probe has not contacted the pregnant woman's belly, the fetal heart rate value display screen of the fetal heart monitor still displays a value, which is easy to give the user the illusion that the fetal heart monitor is damaged, and is easy to make the user doubt the accuracy of the heart rate value measured by the fetal heart monitor. Two, when the fetal heart monitor probe contacts the skin of the pregnant woman, and when the fetal heart is not found, the friction sound is generated in the process of moving the probe to find the fetal heart. The friction sound is a harsh noise, and if the time for finding the fetal heart is long, it means that the pregnant woman has to endure the noise for a long time, which is easy to cause discomfort of the pregnant woman. SUMMARY

[0004] In order to solve the above problems, the present application provides an inductive fetal heart monitor, which is provided with two sensors connected with the MCU, the sensor one is used to identify whether the fetal heart monitor contacts the skin of the pregnant woman, so as to judge whether the fetal heart monitor is used correctly, and the sensor two is used to identify whether the fetal heart monitor is in the process of finding the fetal heart, so as to avoid the harsh noise generated by the friction between the probe and the skin of the pregnant woman, and reduce the burden of the pregnant woman.

[0005] The present application is realized by the following technical solutions:

[0006] The present application provides an inductive fetal heart monitor, which comprises a fetal heart monitor body and a probe, the fetal heart monitor body comprises a power module, a main control module, a signal source switching module, a grounding signal module and a fetal heart output module, the main control module is connected with the signal source switching module, the grounding signal module and the fetal heart output module are both connected with the signal source switching module, the probe comprises a probe body, a sensor one and a sensor two, the probe body is connected with the signal source switching module, the sensor one and the sensor two are arranged on the probe body, the sensor one and the sensor two are both connected with the main control module, and the power module is connected with the main control module, the sensor one and the sensor two respectively.

[0007] Further, the power module comprises a rechargeable battery and a charging terminal, and the rechargeable battery is connected with the charging terminal.

[0008] Further, the master control module comprises an MCU, the MCU comprises an MCU input unit, an MCU output unit and a data processing unit, the MCU input unit is used for receiving a data signal, the MCU output unit is used for outputting a control instruction, and the data processing unit is used for performing algorithm operation on the data signal.

[0009] Further, the source switching module comprises a source switching circuit, and the source switching circuit is connected with the MCU.

[0010] Further, the ground signal module comprises a ground terminal, and the ground terminal is connected with the source switching circuit.

[0011] Further, the fetal heart output module comprises a fetal heart output circuit, and the fetal heart output circuit is used for outputting a fetal heart signal.

[0012] Further, the probe body comprises a probe cover and an ultrasonic wafer, the ultrasonic wafer is connected with the source switching circuit, the ultrasonic wafer is arranged on the probe cover, the sensor one and the sensor two are arranged on the outer side surface of the probe cover, and the outer side surfaces of the sensor one and the sensor two are flush with the outer side surface of the probe cover.

[0013] Further, the sensor one comprises an infrared emitter, an infrared receiver, a comparator one, a reference source one and an output terminal one, the infrared emitter is connected with the charging battery, the infrared receiver is connected with the comparator one, the comparator one is connected with the output terminal one, the output terminal one is connected with the sensor two, the reference source one is used for setting a threshold value for judging the strength of the received infrared signal, and the output terminal one is used for outputting the comparison result value of the comparator one.

[0014] Further, the sensor two comprises a switching circuit, a green light emitter, a green light receiver, a filter amplification circuit, a comparator two and a reference source two, the switching circuit is connected with the charging battery and the output terminal one respectively, the green light receiver is connected with the filter amplification circuit, the filter amplification circuit is connected with the comparator two, the comparator two is connected with the MCU, and the reference source two is used for setting a threshold value for judging the strength of the received green light signal.

[0015] Further, the fetal heart monitor body further comprises a state indication module, the state indication module comprises an indicator light one and an indicator light two, and the indicator light one and the indicator light two are connected with the MCU.

[0016] The beneficial effects of the present application are as follows:

[0017] (1) the present application adds two sensors on the probe, and adds a signal source switching circuit, controls the signal source switching circuit through the MCU, switches the two sources of the signal source switching circuit, fetal heart signal or ground signal, uses sensor one to emit and receive infrared light, identifies and judges whether the fetal heart monitor has contacted the skin of the pregnant woman, if not, outputs 0, and then uses sensor two to emit and receive green light, identifies and judges whether the fetal heart monitor is in the process of finding the fetal heart, if the process of finding is strong, outputs 0, uses the two sensors, and solves the problems that the fetal heart monitor still appears reading when not used correctly and the fetal heart monitor appears harsh noise in the process of finding the fetal heart.

[0018] (2) the present application also includes a state indicating module, through the indication light one and the indication light two of the state indicating module, the current switching state of the signal source switching circuit can be known, and the use condition is convenient for the staff to understand. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 it is a structure schematic view of the probe cover of the present application;

[0020] Figure 2 it is a circuit block schematic view of the present application;

[0021] Figure 3 it is a circuit block schematic view of sensor one of the present application;

[0022] Figure 4 it is a circuit block schematic view of sensor two of the present application.

[0023] The following describes the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] 1, probe cover; 2, sensor one; 3, sensor two. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indications also change accordingly.

[0027] In addition, the description herein involving "first", "second", and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0028] Please refer to Figures 1 to 4 The application provides an inductive fetal heart monitor. The fetal heart monitor comprises a fetal heart monitor body and a probe. The fetal heart monitor body comprises a power module, a main control module, a signal source switching module, a grounding signal module and a fetal heart signal output module. The power module is a rechargeable battery, which increases the convenience and sustainability of the fetal heart monitor and provides stable direct current for each part of the fetal heart monitor. The main control module is an MCU, which is connected with the rechargeable battery. The MCU comprises an MCU input unit, an MCU output unit and a data processing unit. The MCU input unit and the MCU output unit are connected with the data processing unit. The signal source switching module is a two-way signal source switching circuit, which is connected with the probe and the grounding signal module. The grounding signal module is a grounding signal. The fetal heart signal output module is connected with the signal source switching circuit and is a fetal heart signal output circuit, which is used for outputting fetal heart signals and presenting the fetal heart signals to a user. The signal source switching circuit is connected with the MCU, which controls the signal source switching circuit to output signals from the probe signals and the grounding signals in two ways. The probe signal is a monitoring fetal heart signal.

[0029] Please refer to Figure 1 Further, in order to more accurately obtain signals and reduce the burden on pregnant women, in the embodiment, the probe comprises a probe body, a sensor one 2 and a sensor two 3. The probe body comprises a probe cover 1 and an ultrasonic wafer. The ultrasonic wafer is installed on the probe cover 1. The ultrasonic wafer is connected with the signal source switching circuit. The ultrasonic wafer is used for obtaining fetal heart signals and transmitting the fetal heart signals to the signal source switching circuit. The signal source switching circuit transmits the fetal heart signals to the fetal heart signal output module under the control of the MCU. The fetal heart signal output module outputs the fetal heart signals. The probe cover 1 is a structure for contacting the pregnant woman's belly. The sensor one 2 and the sensor two 3 are installed on the probe cover. The sensor one 2 and the sensor two 3 are arranged flush with the outer side of the probe cover 1 so as not to interfere with the contact between the probe cover and the pregnant woman's belly. The sensor one 2 and the sensor two 3 are connected with each other. The sensor one 2 and the sensor two 3 are connected with the MCU. The sensor one 2 and the sensor two 3 are connected with the power module. The power module supplies power to the sensor one 2 and the sensor two 3.

[0030] Please refer toFigure 3 Further, in order to obtain the contact signal and more accurately obtain the signal of whether the fetal heart monitor is in use, in the embodiment, the sensor one comprises an infrared emitter, an infrared receiver, a comparator one, a reference source one and an output unit one. The infrared emitter is used for emitting infrared light. The infrared receiver is used for receiving infrared light. When the infrared emitter emits infrared light, the infrared light will be reflected when encountering an object. The reflected infrared light is received by the infrared receiver, so that the object is identified. The comparator one is used for comparing two kinds of signal data. The infrared receiver is connected with the comparator one. The comparator one receives the infrared signal data of the infrared receiver. The reference source one is a reference data. The reference data is obtained by setting. The reference data is a constant. The infrared signal data received by the comparator one is compared with the reference data, so that a comparison signal is obtained. The output unit one of the comparator one outputs correspondingly. The output unit one is an output terminal one. The output is a high level or a low level. The output terminal one is connected with the sensor two 3. The output result is transmitted to the sensor two 3. When the probe does not contact the human body, the infrared receiver cannot receive the infrared signal. At this time, the comparator one outputs a high level, that is, the output terminal one is a high level. When the probe is far away from the human body, the signal received by the infrared receiver is still weak. The comparator one still outputs a high level, that is, the output terminal one is still a high level. When the probe is close enough to the human body, the signal received by the infrared receiver is strong. The comparator one outputs a low level, that is, the output terminal one is a low level. The reference source one is used for setting the threshold value of judging the strength of the received infrared signal. The output terminal one is used as a kind of control signal to participate in the next stage circuit, that is, the data processing of the sensor two.

[0031] Please refer to Figure 4, further, in order to prevent the occurrence of irritating noise when using the fetal heart instrument to find the fetal heart position, causing the pregnant woman to be uncomfortable, in the embodiment, the sensor two includes a switching unit, a green light emitting unit, a green light receiving unit, a filter amplification unit, a comparison unit two and a reference unit two. The switching unit is a switching circuit, which realizes the conduction or disconnection of the circuit, and the switching circuit is connected with the output end one of the sensor one. The opening or closing of the switching circuit is controlled by the high or low level of the output end one of the sensor one. The green light emitting unit is a green light emitter, which is used for emitting green light. The green light receiving unit is a green light receiver, which is used for receiving the reflected green light emitted by the green light emitter. The filter amplification unit is a filter amplification circuit, which is connected with the green light receiver and filters and amplifies the green light signal through the filter amplification circuit. The comparison unit two is a comparator two, which is connected with the filter amplification circuit. The filter amplifier transmits the filtered and amplified green light signal to the comparator two, and the comparator two receives the green light signal. The reference unit two is a reference source two, which is a reference data. The reference data is obtained by setting, and the reference data is a constant. The comparator two compares the green light signal data with the reference data of the reference source two, outputs high or low level, and transmits the high or low level signal to the MCU. After receiving the signal, the MCU sends a control instruction to control the signal source switching circuit to output. When the output end one is high level, the switching circuit is disconnected, and the green light emitter does not work due to no power supply. At this time, the comparator two outputs low level and transmits to the MCU. When the output end one is low level, the switching circuit is connected, and the green light emitter is connected to the power supply and works. When the probe cover is tightly attached to the skin and basically remains stationary, the comparator two outputs stable high level. When the probe cover is moved on the skin, due to the gap between the probe cover and the skin, the green light signal received by the green light receiver is not constant, and the signal output by the comparator two is constantly switched between high and low levels. The reference source two is used to set the threshold value of the strength of the received green light signal, so as to adjust the sensitivity and frequency of the high and low level switching. Thus, the MCU can obtain three states from the comparator two, which are constant high level, constant low level and high-low level frequent switching. Only when it is in constant high level or the high-low level frequent switching degree is very low and meets the algorithm condition, the MCU controls the signal source switching circuit to switch the input end to the fetal heart signal input, and the fetal heart instrument normally detects the fetal heart; otherwise, the MCU controls the signal source switching unit to switch the input end to the signal ground, so as to filter the unstable signal.

[0032] Please refer to Figure 2Further, in order to make the user more clearly understand the signal switching state, in the embodiment, a state indicating module is further included, which is used for indicating the channel in which the current signal source switching is located. The state indicating module includes indicator light one and indicator light two, which are connected with the MCU. The indicator light one is used for displaying that the signal switching is the fetal heart signal, and the indicator light two is used for displaying that the signal switching is the ground signal.

[0033] The working principle of the present application is as follows: by integrating sensor one 2 and sensor two 3 on the probe cover, connecting sensor one 2 and sensor two 3, and electrically connecting sensor one 2 and sensor two 3 with the MCU, when the fetal heart monitor probe cover does not contact any object, sensor one 2 is effective, after output by the comparator one, sensor two 3 is not worked, the MCU switches the signal source switching circuit to the ground signal, so that the fetal heart signal is stably output as 0; when the fetal heart monitor probe cover contacts an object, sensor one 2 is invalid, after output by the comparator one, sensor two 3 obtains power to work. The signal of sensor two 3 is filtered and amplified, and then is shaped by the comparator two and enters the MCU for algorithm operation. The algorithm is: counting the number of jitter of the output signal of the comparator two in a unit time. When the number of jitter is greater than the reference, the signal source switching circuit is switched to the ground signal to shield the rubbing sound; otherwise, the signal source switching circuit is switched to the fetal heart signal.

[0034] Of course, the present application can have other various embodiments, and based on the embodiment, other embodiments obtained by those skilled in the art without any creative labor fall within the scope of the present application.

Claims

1. An inductive fetal heart monitor comprising a fetal heart monitor body and a probe, characterized in that, The fetal heart monitor body comprises a power module, a main control module, a signal source switching module, a grounding signal module and a fetal heart output module, the main control module is connected with the signal source switching module, the grounding signal module and the fetal heart output module are both connected with the signal source switching module, the probe comprises a probe body, a sensor one and a sensor two, the probe body is connected with the signal source switching module, the sensor one and the sensor two are arranged on the probe body, the sensor one and the sensor two are both connected with the main control module, the power module is connected with the main control module, the sensor one and the sensor two respectively. The sensor one comprises an infrared emitter, an infrared receiver, a comparator one, a reference source one and an output terminal one, the infrared emitter is connected with a charging battery, the infrared receiver is connected with the comparator one, the comparator one is connected with the output terminal one, the output terminal one is connected with the sensor two, the reference source one is used for setting a threshold value for judging the strength of the received infrared signal, and the output terminal one is used for outputting the comparison result value of the comparator one. The sensor two comprises a switching circuit, a green light emitter, a green light receiver, a filter amplification circuit, a comparator two and a reference source two, the switching circuit is connected with the charging battery and the output terminal one respectively, the green light receiver is connected with the filter amplification circuit, the filter amplification circuit is connected with the comparator two, the comparator two is connected with the MCU, and the reference source two is used for setting a threshold value for judging the strength of the received green light signal. When the probe does not contact the human skin, the output terminal one of the sensor one outputs a high level, controls the switching circuit of the sensor two to be disconnected, the sensor two does not work, and the main control module controls the signal source switching module to switch to the grounding signal. When the probe contacts the human skin, the output terminal one of the sensor one outputs a low level, controls the switching circuit of the sensor two to be connected, and the green light emitter works. The main control module judges whether the probe is in a moving state according to the signal output by the comparator two, if it is in a moving state, the signal source switching module is switched to the grounding signal to shield noise. If it is in a stable state, the signal source switching module is switched to the fetal heart signal to perform normal fetal heart detection.

2. The inductive fetal heart monitor according to claim 1, characterized in that The power module comprises a charging battery and a charging terminal, and the charging battery is connected with the charging terminal.

3. The inductive fetal heart monitor of claim 1 wherein, The main control module comprises an MCU, the MCU comprises an MCU input unit, an MCU output unit and a data processing unit, the MCU input unit is used for receiving a data signal, the MCU output unit is used for outputting a control instruction, and the data processing unit is used for performing algorithm operation on the data signal.

4. The inductive fetal heart monitor of claim 3 wherein, The signal source switching module comprises a signal source switching circuit, and the signal source switching circuit is connected with the MCU.

5. The inductive fetal heart monitor of claim 4 wherein, The grounding signal module comprises a grounding terminal, and the grounding terminal is connected with the signal source switching circuit.

6. The inductive fetal heart monitor of claim 1 wherein, The fetal heart output module comprises a fetal heart output circuit, and the fetal heart output circuit is used for outputting a fetal heart signal.

7. The inductive fetal heart monitor of claim 2 wherein, The probe body comprises a probe cover and an ultrasonic wafer, the ultrasonic wafer is connected with a source switching circuit, the ultrasonic wafer is arranged on the probe cover, sensor one and sensor two are arranged on the outer side surface of the probe cover, and the outer side surfaces of sensor one and sensor two are flush with the outer side surface of the probe cover.

8. The inductive fetal heart monitor of claim 1 wherein, The fetal heart instrument body further comprises a state indication module, the state indication module comprises indicator light one and indicator light two, and the indicator light one and the indicator light two are connected with the MCU.

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