CN113274049A

CN113274049A - Wireless low-noise stethoscope

Info

Publication number: CN113274049A
Application number: CN202110532378.6A
Authority: CN
Inventors: 陈燚; 王晓阳; 刘明; 姜红; 于鹏; 马磊; 孙耀杰
Original assignee: Fudan University; Zhongshan Hospital Fudan University
Current assignee: Fudan University; Zhongshan Hospital Fudan University
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-08-20

Abstract

The invention relates to a wireless low-noise stethoscope, which comprises an auscultation probe, a radio device, a main control board and a terminal control module, wherein the auscultation probe is connected with the radio device through a sound guide pipe, the auscultation probe is detachable from the radio device, the radio device is installed on the main control board and converts sound signals into electric signals to be transmitted into the main control board, the main control board is provided with primary amplification, filtering and secondary amplification to correct the signals so as to restore real signals, the main control board is used for connecting the signals with the terminal control module through Bluetooth, the main control board is provided with an OLED screen, the OLED screen is used for displaying sound waveforms, and the main control board is provided with keys for controlling volume and switching. When the device is used, the probe is placed at a position where sound is heard, the screen synchronously displays liquid crystal, the volume of the earphone can be adjusted through the keys, the earphone end listens to auscultation sound in real time, and the terminal control module completes operations of sound waveform playing, real-time playing, data storage and data playback.

Description

Wireless low-noise stethoscope

Technical Field

The invention relates to the field of medical instruments, in particular to a wireless low-noise stethoscope.

Background

The stethoscope is an indispensable instrument in medical instruments since the invention is discovered, and at present, many different types of stethoscopes have been produced according to different application scenes of auscultation crowds and parts, but the stethoscopes on the market at present still take the lead of a wired in-ear stethoscope, and the existing wireless stethoscopes have rough treatment on auscultation noise, so that the auscultation effect of the traditional in-ear stethoscope cannot be achieved. Based on the wireless low-noise stethoscope, the invention designs a wireless low-noise stethoscope and a wireless low-noise system.

Disclosure of Invention

The invention aims to provide a wireless low-noise stethoscope.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a wireless low-noise stethoscope, which comprises an auscultation probe 1, a radio device 2, a main control board 3 and a terminal control module 18, wherein the auscultation probe 1 is connected with the radio device 2 through a sound guide pipe, the auscultation probe 1 and the radio device 2 are detachable, the radio device 2 is installed on the main control board 3 and converts sound signals into electric signals to be transmitted into the main control board 3, the main control board 3 is wirelessly connected with the terminal control module 18, the main control board performs signal correction through primary amplification, filtering and secondary amplification to restore real signals, the main control board is provided with an OLED screen, the OLED screen 4 performs waveform display, the main control board 3 is also provided with keys, and the number of the keys is two, so that the volume and the switch are respectively controlled; the main control board 3 is composed of a main control MCU4, a type-c charging module 5, a battery power supply module 6, a switch module 7, an audio decoding module 8, an independent power supply module 9, an audio input module 10, an environmental sound compensation module 11, an amplification compensation module 12, an audio conversion module 13, an audio output module 14, a battery voltage measurement module 15, a data display module 16, a Bluetooth communication module 17 and a terminal control module 18, wherein the output end of the type-c charging module 5 is respectively connected with the input ends of the battery power supply module 6 and the switch module 16, the type-c charging module 5 charges the battery power supply module 6, the output end of the battery power supply module 6 is connected with the input end of the switch module 7, the output end of the switch module 7 is connected with the input end of the main control MCU4, and the battery power supply module 6 supplies power to the main control MCU 4; the output end of the main control MCU4 is respectively connected with the independent power supply module 9 and the audio decoding module 8, the output end of the independent power supply module 9 is connected with the input end of the audio decoding module 8, the independent power supply module 9 independently supplies power to the audio decoding module 8, the output end of the audio decoding module 8 is connected with the output end of the audio input module 10, the output ends of the audio input module 10 and the environmental sound compensation module 11 are respectively connected with the input end of the amplification compensation module 12, the output end of the amplification compensation module 12 is respectively connected with the input ends of the audio conversion module 13 and the audio output module 14, and the output end of the audio conversion module 13 is connected with the input end of the main control MCU 4; the master control MCU4 is bidirectionally connected with the battery voltage measuring circuit 15; the battery voltage measuring circuit 15 measures whether a battery is accessed, if so, the battery voltage is measured, a power supply voltage value is returned to the main control MCU4, and if the battery voltage measuring circuit 15 measures that the battery is not accessed, a type-c access mark is returned; the main control module MCU13 is bidirectionally connected with the data display module 16, and the data display module 16 displays an output volume value, a visual audio frequency and a battery voltage value; the output end of the main control module MCU4 is connected with the input end of the Bluetooth communication module 17, and the output end of the Bluetooth communication module 17 is connected with the input end of the terminal control module 18.

In the invention, the auscultation probe 1 adopts an auscultation film with the diameter of 30 mm.

In the invention, the sound receiving device 2 adopts a microphone to receive sound.

In the invention, the primary amplifying circuit arranged on the main control board 3 adopts an operational amplifying chip with high common mode rejection ratio, and the primary amplifying circuit is connected with the filter circuit.

In the invention, the filtering circuit arranged on the main control board 3 adopts an active filtering chip suitable for the application environment of the stethoscope, so as to ensure accurate cut-off frequency, and the filtering circuit is respectively connected with the primary amplifying circuit and the secondary amplifying circuit.

In the invention, the secondary amplifying circuit arranged on the main control board 3 adopts different amplifying times different from the primary amplifying circuit, and the amplifying times are adjustable, and the secondary amplifying circuit is connected with the audio output circuit and the main control circuit.

In the invention, the main control board 3 is provided with a type-c charging module 5 which works stably and can be used for charging.

Compared with the prior art, the invention provides a wireless low-noise stethoscope, which has the following beneficial effects:

the auscultation probe is used for picking up sound, 44mm auscultation films are available on the market, although the auscultation range is large, the auscultation effect is not concentrated, the 30mm auscultation films can be used for intensively listening pathological noise, noise is reduced, sound is collected by the sound collecting device through the sound guide tube, the received signal is subjected to targeted processing of specific environmental noise under an auscultation application scene through the preprocessing circuit, and the sound collected is ensured to achieve high fidelity. Meanwhile, the wireless earphone is adopted to listen to the sound, so that the pain of medical staff caused by wearing the stethoscope in the ear for a long time and the noise influence caused by the friction of clothes are fundamentally solved. And the terminal control module is communicated with the main control board through the Bluetooth module, plays sound waveforms, plays in real time, stores data and plays back the data, and can be used for teaching and remote medical application.

Drawings

FIG. 1 is a main body structure view of the present invention;

FIG. 2 is a flow chart of operational blocks of the present invention;

reference numbers in the figures: the system comprises a stethoscope probe 1, a radio 2, a main control panel 3, a main control MCU4, a type-c charging module 5, a battery power supply module 6, a switch module 7, an audio decoding module 8, an independent power supply module 9, an audio input module 10, an environmental sound compensation module 11, an amplification compensation module 12, an audio conversion module 13, an audio output module 14, a battery voltage measurement module 15, a data display module 16, a Bluetooth communication module 17 and a terminal control module 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the invention provides a technical scheme that: the utility model provides a wireless low noise stethoscope mainly includes auscultation probe 1, radio reception device 2, main control board 3 and terminal control module 18, auscultation probe 1 is connected with radio reception device 2 through the leading note pipe, auscultation probe 1 can be dismantled with radio reception device 2, radio reception device 2 is installed in main control board 3, turns into the signal of telecommunication with sound signal and passes into main control board 3, the main control board carries out signal correction through elementary amplification, filtering, second grade amplification with restore true signal, main control board 3 carries out wireless connection with terminal control module 18, the main control board is equipped with the OLED screen, the OLED screen carries out waveform display, the main control board is provided with the button, controls volume, switch. When the stethoscope is used, the probe is placed at a position where sound can be heard, the screen synchronously displays liquid crystal, the volume of the earphone can be adjusted through keys, the earphone end listens to auscultation sound in real time, and the terminal control module 18 can play sound waveforms, play sound in real time, store data and play back data. The main control board 3 is composed of a main control MCU4, a type-c charging module 5, a battery power supply module 6, a switch module 7, an audio decoding module 8, an independent power supply module 9, an audio input module 10, an environmental sound compensation module 11, an amplification compensation module 12, an audio conversion module 13, an audio output module 14, a battery voltage measurement module 15, a data display module 16, a Bluetooth communication module 17 and a terminal control module 18, wherein the output end of the type-c charging module 5 is respectively connected with the input ends of the battery power supply module 6 and the switch module 16, the type-c charging module 5 charges the battery power supply module 6, the output end of the battery power supply module 6 is connected with the input end of the switch module 7, the output end of the switch module 7 is connected with the input end of the main control MCU4, and the battery power supply module 6 supplies power to the main control MCU 4; the output end of the main control MCU4 is respectively connected with the independent power supply module 9 and the audio decoding module 8, the output end of the independent power supply module 9 is connected with the input end of the audio decoding module 8, the independent power supply module 9 independently supplies power to the audio decoding module 8, the output end of the audio decoding module 8 is connected with the output end of the audio input module 10, the output ends of the audio input module 10 and the environmental sound compensation module 11 are respectively connected with the input end of the amplification compensation module 12, the output end of the amplification compensation module 12 is respectively connected with the input ends of the audio conversion module 13 and the audio output module 14, and the output end of the audio conversion module 13 is connected with the input end of the main control MCU 4; the master control MCU4 is bidirectionally connected with the battery voltage measuring circuit 15; the battery voltage measuring circuit 15 measures whether a battery is accessed, if so, the battery voltage is measured, a power supply voltage value is returned to the main control MCU4, and if the battery voltage measuring circuit 15 measures that the battery is not accessed, a type-c access mark is returned; the main control module MCU13 is bidirectionally connected with the data display module 16, and the data display module 16 displays an output volume value, a visual audio frequency and a battery voltage value; the output end of the main control module MCU4 is connected with the input end of the Bluetooth communication module 17, and the output end of the Bluetooth communication module 17 is connected with the input end of the terminal control module 18.

One specific application of this embodiment is: place auscultation probe in listening position, sound passes through the leading-in sound guide tube of diaphragm, and the radio reception device carries out sound signal and collects to turn into the signal of telecommunication, the signal of telecommunication carries out audio output through noise reduction, the earphone with the main control board carries out the communication and acquires sound, and medical personnel carry out supplementary diagnosis through the sound of listening. Meanwhile, the terminal control module communicates with the main control board to receive signals, analyzes and processes the signals, directly plays high-fidelity sound, and stores audio and analysis results in the background for a doctor to listen to or teach for multiple times.

Another embodiment of the invention: the patient listens to sound with the auscultation probe at home, and terminal control module receives data, carries out the sound by the doctor long-rangely and acquires in order to reach the effect of long-rangely auscultation or acquire the audio file that the patient saved by the doctor and carry out asynchronous auscultation diagnosis.

Claims

1. The wireless low-noise stethoscope is characterized by comprising an auscultation probe (1), a radio receiving device (2), a main control board (3) and a terminal control module (18), wherein the auscultation probe (1) is connected with the radio receiving device (2) through a sound guide tube, the auscultation probe (1) and the radio receiving device (2) are detachable, the radio receiving device (2) is installed on the main control board (3) and converts sound signals into electric signals to be transmitted into the main control board (3), the main control board (3) is wirelessly connected with the terminal control module 18, the main control board performs signal correction through primary amplification, filtering and secondary amplification to restore real signals, the main control board is provided with an OLED screen, the OLED screen (4) performs waveform display, keys are further arranged on the main control board (3), and the keys are two in number and respectively control volume and a switch; the main control board (3) is composed of a main control MCU (4), a type-c charging module (5), a battery power supply module (6), a switch module (7), an audio decoding module (8), an independent power supply module (9), an audio input module (10), an environmental sound compensation module (11), an amplification compensation module (12), an audio conversion module (13), an audio output module (14), a battery voltage measurement module (15), a data display module (16), a Bluetooth communication module (17) and a terminal control module (18), wherein the output end of the type-c charging module (5) is respectively connected with the input ends of the battery power supply module (6) and the switch module (16), the type-c charging module (5) charges the battery power supply module (6), and the output end of the battery power supply module (6) is connected with the input end of the switch module (7), the output end of the switch module (7) is connected with the input end of the main control MCU (4), and the battery power supply module (6) supplies power to the main control MCU (4); the output end of the main control MCU (4) is respectively connected with the independent power supply module (9) and the audio decoding module (8), the output end of the independent power supply module (9) is connected with the input end of the audio decoding module (8), the independent power supply module (9) independently supplies power to the audio decoding module (8), the output end of the audio decoding module (8) is connected with the output end of the audio input module (10), the output ends of the audio input module (10) and the environmental sound compensation module (11) are respectively connected with the input end of the amplification compensation module (12), the output end of the amplification compensation module (12) is respectively connected with the input ends of the audio conversion module (13) and the audio output module (14), and the output end of the audio conversion module (13) is connected with the input end of the main control MCU (4); the master control MCU (4) is in bidirectional connection with the battery voltage measuring circuit (15); the battery voltage measuring circuit (15) measures whether a battery is accessed, if so, the battery voltage is measured, a power supply voltage value is returned to the main control MCU (4), and if the battery voltage measuring circuit (15) measures that the battery is not accessed, a type-c access mark is returned; the main control module MCU (13) is bidirectionally connected with the data display module (16), and the data display module (16) displays an output volume value, a visual audio and a battery voltage value; the output end of the main control module MCU (4) is connected with the input end of the Bluetooth communication module (17), and the output end of the Bluetooth communication module (17) is connected with the input end of the terminal control module (18).

2. An infinite low noise stethoscope according to claim 1, wherein the auscultation probe (1) uses an auscultation membrane with a diameter of 30 mm.

3. The wireless low-noise stethoscope according to claim 1, wherein said sound-collecting device (2) collects sound by means of a microphone.

4. The wireless low-noise stethoscope according to claim 1, wherein the primary amplifying circuit of the main control panel (3) is an operational amplifying chip with high common mode rejection ratio, and the primary amplifying circuit is connected with the filter circuit.

5. The wireless low-noise stethoscope according to claim 1, wherein the filtering circuit of the main control board (3) is an active filtering chip suitable for stethoscope application environment, so as to ensure accurate cut-off frequency, and the filtering circuit is connected to the primary amplifying circuit and the secondary amplifying circuit respectively.

6. The wireless low-noise stethoscope according to claim 1, wherein the main control board (3) is provided with a secondary amplifying circuit with different amplification factor from the primary amplifying circuit and adjustable amplification factor, and the secondary amplifying circuit is connected with the audio output circuit and the main control circuit.

7. The wireless low noise stethoscope according to claim 1, wherein said main control board (3) is provided with a type-c charging module (5) which operates stably and can be charged.