Fetus-voice meter capable of automatically eliminating coupling agent smearing noise

Abstract

The utility model discloses a fetus-voice meter capable of automatically eliminating coupling agent smearing noise, which comprises an ultrasonic circuit used for transmitting pulses or continuous ultrasonic waves; the input end of the echo detection circuit is electrically connected with the output end of the ultrasonic circuit, and the echo detection circuit is used for detecting an ultrasonic signal reflected by the ultrasonic circuit; the corresponding output end of the main control circuit is electrically connected with the input end of the ultrasonic circuit, and the corresponding input end of the main control circuit is electrically connected with the output end of the echo detection circuit; and the input end of the sound playing circuit is electrically connected with the corresponding output end of the main control circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to fetal heart instrument technical field, specifically to a fetal heart instrument that can automatically eliminate coupling agent smearing noise. BACKGROUND

[0002] During the use of the traditional fetal heart instrument, if the user does not place the probe on the pregnant woman's belly immediately after smearing coupling agent on the probe's ultrasonic surface for detection, the shaking of the coupling agent in the air will produce strong echo, which is detected by the fetal heart instrument and played through the loudspeaker. This sound will further intensify the shaking of the coupling agent, forming a positive cycle and producing a piercing whistling sound. SUMMARY

[0003] The utility model discloses a fetal heart instrument that can automatically eliminate coupling agent smearing noise. When the probe does not contact the human skin, the sound output is automatically turned off to avoid producing a whistling sound. Thus, the problem of the existing fetal heart instrument producing a piercing whistling sound is solved.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a fetal heart instrument that can automatically eliminate coupling agent smearing noise, comprising:

[0005] An ultrasonic circuit is used to emit pulsed or continuous ultrasonic waves.

[0006] An echo detection circuit is electrically connected to the output end of the ultrasonic circuit and used to detect the ultrasonic signal reflected by the ultrasonic circuit.

[0007] A main control circuit is electrically connected to the input end of the ultrasonic circuit and the output end of the echo detection circuit.

[0008] A sound playing circuit is electrically connected to the output end of the main control circuit.

[0009] A power supply VCC provides working voltage for the ultrasonic circuit, the echo detection circuit, the main control circuit, and the sound playing circuit.

[0010] As a further improvement of the above-mentioned technical scheme, the ultrasonic circuit comprises an ultrasonic wafer used to emit ultrasonic waves and receive reflected ultrasonic waves.

[0011] As a further improvement of the above-mentioned technical scheme, the ultrasonic circuit comprises an ultrasonic emitting wafer and an ultrasonic receiving wafer. The ultrasonic emitting wafer is used to emit ultrasonic waves, and the ultrasonic receiving wafer is used to receive reflected ultrasonic waves.

[0012] As a further improvement of the above technical solution: the main control circuit comprises a GD3230F8P6 chip and a peripheral circuit of the GD3230F8P6 chip.

[0013] As a further improvement of the above technical solution: the ultrasonic wave circuit further comprises an inductor L4, a capacitor C74 and a field effect transistor Q4; one end of the inductor L4 is electrically connected with a power supply VCC, the other end of the inductor L4 is electrically connected with one end of the capacitor C74 and a drain of the field effect transistor Q4 respectively, a source of the field effect transistor Q4 is grounded, a gate of the field effect transistor Q4 is electrically connected with an 8th pin of the GD3230F8P6 chip; one end of the ultrasonic wave chip or the ultrasonic transmitting chip is electrically connected with the other end of the capacitor C74.

[0014] As a further improvement of the above technical solution: the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers.

[0015] As a further improvement of the above technical solution: the echo detection circuit comprises an operational amplifier U15D, an operational amplifier U16D, a resistor R69, a resistor R71, a resistor R70, a resistor R72, a diode D12 and a diode D13; an in-phase terminal of the operational amplifier U15D is electrically connected with the other end of the ultrasonic wave chip or the ultrasonic receiving chip; one end of the resistor R69 is grounded, the other end of the resistor R69 is electrically connected with one end of the resistor R71, a positive electrode of the diode D12 and an inverting terminal of the operational amplifier U15D respectively; the other end of the resistor R71 is electrically connected with an inverting terminal of the operational amplifier U16D and one end of the resistor R70 respectively, the other end of the resistor R70 is electrically connected with a 10th pin of the GD3230F8P6 chip, a negative electrode of the diode D12 is electrically connected with an output terminal of the operational amplifier U15D and a positive electrode of the diode D13 respectively; a negative electrode of the diode D13 is electrically connected with an in-phase terminal of the operational amplifier U16D and one end of the resistor R72 respectively; the other end of the resistor R72 is grounded, the output terminal of the operational amplifier U15D is electrically connected with the 10th pin of the GD3230F8P6 chip.

[0016] As a further improvement of the above technical solution: the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers.

[0017] As a further improvement of the above technical solution: the sound playing circuit comprises a capacitor C76, a resistor R74, a resistor R75, a chip 8002 and a loudspeaker; one end of the capacitor C76 is electrically connected with the 11th pin of the GD3230F8P6 chip, and the other end of the capacitor C76 is electrically connected with the 10th pin of the chip 8002 through the resistor R74; the resistor R75 is electrically connected with the 4th pin and the 5th pin of the chip 8002 respectively; and the loudspeaker is electrically connected with the 5th pin and the 8th pin of the chip 8002.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] (1), the utility model discloses a through emitting pulse or continuous ultrasonic wave to ultrasonic wave receiving wafer through the ultrasonic circuit, and through the echo detection circuit inspection ultrasonic wave received to the ultrasonic wave receiving wafer, and carry out amplification, shaping, and provide for the main control circuit and sample, for identifying the size of echo, and the main control circuit judges whether the probe contacts the human skin surface according to the echo size, and controls the output of the sound playing circuit, thereby avoiding producing the ear-piercing whistling sound;

[0020] (2), the utility model discloses an ultrasonic circuit through ultrasonic wafer can emit pulse ultrasonic wave, and can receive the ultrasonic wave that reflects back;

[0021] (3), the utility model discloses an ultrasonic circuit through ultrasonic wafer emits ultrasonic wave, and through ultrasonic receiving wafer is used for receiving the ultrasonic wave that reflects back. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole circuit working principle diagram of the utility model ultrasonic circuit including ultrasonic wafer;

[0023] Figure 2 It is the whole circuit working principle diagram of the utility model ultrasonic circuit including ultrasonic wafer, ultrasonic receiving wafer;

[0024] Figure 3 It is the circuit working flow chart of the utility model. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1 , Figure 3 As shown, a fetal heart rate monitor capable of automatically eliminating coupling agent application noise according to this embodiment includes:

[0030] An ultrasonic circuit for emitting pulsed or continuous ultrasonic waves;

[0031] An echo detection circuit is provided, wherein the input terminal of the echo detection circuit is electrically connected to the output terminal of the ultrasonic circuit, and is used to detect the ultrasonic signal reflected back by the ultrasonic circuit.

[0032] The main control circuit has its output terminal electrically connected to the input terminal of the ultrasonic circuit, and its input terminal electrically connected to the output terminal of the echo detection circuit.

[0033] A sound playback circuit, wherein the input terminal of the sound playback circuit is electrically connected to the corresponding output terminal of the main control circuit;

[0034] A power supply VCC provides working voltage for ultrasonic circuit, echo detection circuit, main control circuit and sound playing circuit respectively; the ultrasonic circuit comprises an ultrasonic wafer for emitting ultrasonic wave and receiving reflected ultrasonic wave; the main control circuit comprises a GD3230F8P6 chip and peripheral circuit of the GD3230F8P6 chip; the ultrasonic circuit further comprises an inductor L4, a capacitor C74 and a field effect transistor Q4; one end of the inductor L4 is electrically connected with the power supply VCC, and the other end of the inductor L4 is electrically connected with one end of the capacitor C74 and the drain of the field effect transistor Q4 respectively, the source of the field effect transistor Q4 is grounded, and the gate of the field effect transistor Q4 is electrically connected with the 8th pin of the GD3230F8P6 chip; one end of the ultrasonic wafer is electrically connected with the other end of the capacitor C74; the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers; the echo detection circuit comprises the operational amplifier U15D, the operational amplifier U16D, a resistor R69, a resistor R71, a resistor R70, a resistor R72, a diode D12 and a diode D13; the non-inverting terminal of the operational amplifier U15D is electrically connected with the other end of the ultrasonic wafer; one end of the resistor R69 is grounded, and the other end of the resistor R69 is electrically connected with one end of the resistor R71, the anode of the diode D12 and the inverting terminal of the operational amplifier U15D respectively; the other end of the resistor R71 is electrically connected with the inverting terminal of the operational amplifier U16D and one end of the resistor R70 respectively, the other end of the resistor R70 is electrically connected with the 10th pin of the GD3230F8P6 chip, the cathode of the diode D12 is electrically connected with the output terminal of the operational amplifier U15D and the anode of the diode D13 respectively; the cathode of the diode D13 is electrically connected with the non-inverting terminal of the operational amplifier U16D and one end of the resistor R72 respectively; the other end of the resistor R72 is grounded, and the output terminal of the operational amplifier U15D is electrically connected with the 10th pin of the GD3230F8P6 chip; the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers; the sound playing circuit comprises a capacitor C76, a resistor R74, a resistor R75, a chip 8002 and a loudspeaker; one end of the capacitor C76 is electrically connected with the 11th pin of the GD3230F8P6 chip, and the other end of the capacitor C76 is electrically connected with the 10th pin of the chip 8002 through the resistor R74; the resistor R75 is electrically connected with the 4th pin and the 5th pin of the chip 8002 respectively; the loudspeaker is electrically connected with the 5th pin and the 8th pin of the chip 8002;

[0035] Referring to Figure 2 , Figure 3 It is shown that in the embodiment, a fetal heart detector capable of automatically eliminating coupling agent smearing noise comprises:

[0036] ultrasonic wave circuit for emitting pulsed or continuous ultrasonic waves;

[0037] echo detection circuit, an input end of which is electrically connected with an output end of the ultrasonic wave circuit, and which is used for detecting ultrasonic wave signals reflected by the ultrasonic wave circuit;

[0038] main control circuit, a corresponding output end of which is electrically connected with an input end of the ultrasonic wave circuit, and a corresponding input end of which is electrically connected with an output end of the echo detection circuit;

[0039] sound playing circuit, an input end of which is electrically connected with a corresponding output end of the main control circuit;

[0040] A power supply VCC provides working voltage for ultrasonic circuit, echo detection circuit, main control circuit and sound playing circuit respectively; the ultrasonic circuit comprises ultrasonic transmitting chip and ultrasonic receiving chip; the ultrasonic transmitting chip is used for transmitting ultrasonic wave, and the ultrasonic receiving chip is used for receiving reflected ultrasonic wave; the main control circuit comprises GD3230F8P6 chip and peripheral circuit of GD3230F8P6 chip; the ultrasonic circuit further comprises inductor L4, capacitor C74 and field effect transistor Q4; one end of the inductor L4 is electrically connected with the power supply VCC, and the other end of the inductor L4 is electrically connected with one end of the capacitor C74 and the drain of the field effect transistor Q4 respectively, the source of the field effect transistor Q4 is grounded, and the gate of the field effect transistor Q4 is electrically connected with the 8th pin of the GD3230F8P6 chip; the ultrasonic transmitting chip is electrically connected with the other end of the capacitor C74; the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers; the echo detection circuit comprises the operational amplifier U15D, the operational amplifier U16D, resistor R69, resistor R71, resistor R70, resistor R72, diode D12 and diode D13; the non-inverting terminal of the operational amplifier U15D is electrically connected with the ultrasonic receiving chip; one end of the resistor R69 is grounded, and the other end of the resistor R69 is electrically connected with one end of the resistor R71, the anode of the diode D12 and the inverting terminal of the operational amplifier U15D respectively; the other end of the resistor R71 is electrically connected with the inverting terminal of the operational amplifier U16D and one end of the resistor R70 respectively, the other end of the resistor R70 is electrically connected with the 10th pin of the GD3230F8P6 chip, the cathode of the diode D12 is electrically connected with the output terminal of the operational amplifier U15D and the anode of the diode D13 respectively; the cathode of the diode D13 is electrically connected with the non-inverting terminal of the operational amplifier U16D and one end of the resistor R72 respectively; the other end of the resistor R72 is grounded, and the output terminal of the operational amplifier U15D is electrically connected with the 10th pin of the GD3230F8P6 chip; the operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers; the sound playing circuit comprises capacitor C76, resistor R74, resistor R75, chip 8002 and loudspeaker; one end of the capacitor C76 is electrically connected with the 11th pin of the GD3230F8P6 chip, and the other end of the capacitor C76 is electrically connected with the 10th pin of the chip 8002 through the resistor R74; the resistor R75 is electrically connected with the 4th pin and the 5th pin of the chip 8002 respectively; and the loudspeaker is electrically connected with the 5th pin and the 8th pin of the chip 8002.

[0041] Referring to Figures 1 to 3 In the embodiment, the working principle of the fetal heart detector capable of automatically eliminating coupling agent smearing noise is as follows:

[0042] (1), when the operational amplifier U15D and the operational amplifier U16D are responsible for detecting and processing ultrasonic reflection waves; when ultrasonic waves are emitted, they will be reflected back when encountering a surface with different media, and the size difference of the reflection waves of different media will be large. The acoustic medium parameters of the coupling agent and the air differ greatly, and when ultrasonic waves encounter the interface between the coupling agent and the air, a very strong echo will be generated. When the probe contacts the human body, ultrasonic waves will enter the human body, and only when different tissues are encountered will a reflected echo be generated. After the echo passes through the human tissue, it will be very weak. According to the size of the echo, it is determined whether the probe contacts the surface of the human skin;

[0043] (2), and the GD3230F8P6 chip is responsible for receiving the signals output by the operational amplifier U15D and the operational amplifier U16D, and determining whether the probe contacts the surface of the human skin according to the signals. The design of the GD3230F8P6 chip needs to ensure that the signals can be quickly and accurately processed, and the output of the chip 8002 is controlled according to the processing result, so as to control the loudspeaker.

[0044] (4), the sound playing circuit is responsible for playing the fetal heart sound. When the GD3230F8P6 chip determines that the probe has contacted the surface of the human skin, the sound playing circuit will normally play the fetal heart sound. When the GD3230F8P6 chip determines that the probe has not contacted the surface of the human skin, the sound playing circuit will turn off the sound output to avoid producing a howling sound.

[0045] The above-mentioned is only an embodiment of the present application, and the specific structure and characteristics of the scheme known in the art are not described in detail. For those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A fetal heart rate monitor capable of automatically eliminating coupling medium application noise, characterized by, It includes: ultrasonic circuit, which is used to emit pulse or continuous ultrasonic wave; echo detection circuit, the input end of which is electrically connected with the output end of the ultrasonic circuit, and which is used to detect the ultrasonic signal reflected by the ultrasonic circuit; master control circuit, the corresponding output end of which is electrically connected with the input end of the ultrasonic circuit, and the corresponding input end of which is electrically connected with the output end of the echo detection circuit; sound playing circuit, the input end of which is electrically connected with the corresponding output end of the master control circuit; power supply VCC, which provides working voltage for the ultrasonic circuit, the echo detection circuit, the master control circuit and the sound playing circuit.

2. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 1, characterized in that: The ultrasonic circuit includes ultrasonic wafer, which is used to emit ultrasonic wave and receive reflected ultrasonic wave.

3. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 1, characterized in that: The ultrasonic circuit includes ultrasonic emitting wafer and ultrasonic receiving wafer; the ultrasonic emitting wafer is used to emit ultrasonic wave, and the ultrasonic receiving wafer is used to receive reflected ultrasonic wave.

4. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 2, characterized in that: The master control circuit includes GD3230F8P6 chip and the peripheral circuit of the GD3230F8P6 chip.

5. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 4, characterized in that: The ultrasonic circuit further includes inductor L4, capacitor C74 and field effect tube Q4; one end of the inductor L4 is electrically connected with the power supply VCC, and the other end of the inductor L4 is electrically connected with one end of the capacitor C74 and the drain of the field effect tube Q4 respectively, the source of the field effect tube Q4 is grounded, and the gate of the field effect tube Q4 is electrically connected with the 8th pin of the GD3230F8P6 chip; one end of the ultrasonic wafer or the ultrasonic emitting wafer is electrically connected with the other end of the capacitor C74.

6. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 5, characterized in that: The echo detection circuit includes operational amplifier U15D, operational amplifier U16D, resistor R69, resistor R71, resistor R70, resistor R72, diode D12 and diode D13; the non-inverting terminal of the operational amplifier U15D is electrically connected with the other end of the ultrasonic wafer or the ultrasonic receiving wafer; one end of the resistor R69 is grounded, and the other end of the resistor R69 is electrically connected with one end of the resistor R71, the anode of the diode D12 and the inverting terminal of the operational amplifier U15D respectively; the other end of the resistor R71 is electrically connected with the inverting terminal of the operational amplifier U16D and one end of the resistor R70 respectively, the other end of the resistor R70 is electrically connected with the 10th pin of the GD3230F8P6 chip, the cathode of the diode D12 is electrically connected with the output terminal of the operational amplifier U15D and the anode of the diode D13 respectively; the cathode of the diode D13 is electrically connected with the non-inverting terminal of the operational amplifier U16D and one end of the resistor R72 respectively; the other end of the resistor R72 is grounded, and the output terminal of the operational amplifier U15D is electrically connected with the 10th pin of the GD3230F8P6 chip.

7. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 6, characterized in that: The operational amplifier U15D and the operational amplifier U16D are both LM324 operational amplifiers.

8. The fetal heart rate monitor capable of automatically eliminating the noise of the coupling agent smearing according to claim 3, characterized in that: The sound playing circuit comprises a capacitor C76, a resistor R74, a resistor R75, a chip 8002 and a loudspeaker; one end of the capacitor C76 is electrically connected with the 11th pin of the GD3230F8P6 chip, and the other end of the capacitor C76 is electrically connected with the 10th pin of the chip 8002 through the resistor R74; the resistor R75 is electrically connected with the 4th pin and the 5th pin of the chip 8002 respectively; and the loudspeaker is electrically connected with the 5th pin and the 8th pin of the chip 8002.

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