CN110916715B - Heart sound collecting device based on micro acceleration sensor - Google Patents
Heart sound collecting device based on micro acceleration sensor Download PDFInfo
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- CN110916715B CN110916715B CN201911195234.5A CN201911195234A CN110916715B CN 110916715 B CN110916715 B CN 110916715B CN 201911195234 A CN201911195234 A CN 201911195234A CN 110916715 B CN110916715 B CN 110916715B
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- heart sound
- acceleration sensor
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- elastic beam
- micro acceleration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
A heart sound acquisition device based on a micro acceleration sensor belongs to the technical field of medical appliances. The technical scheme of the invention is as follows: a heart sound acquisition device based on a micro acceleration sensor comprises a heart sound acquisition probe, a heart sound signal processing circuit and a PC end display which are electrically connected in sequence; the heart sound collection probe includes: the heart sound probe comprises a heart sound probe shell, a flexible film, a micro acceleration sensor, an elastic beam and an insulating liquid medium; the micro acceleration sensor is electrically connected with the signal input end of the heart sound signal processing circuit through a signal wire, and the signal output end of the heart sound signal processing circuit is electrically connected with the PC end display through a signal wire; the heart sound signal processing circuit comprises a filter circuit, a signal amplifying circuit and an AD conversion device. The heart sound collecting device not only can collect heart sound signals, but also can effectively avoid the interference of environmental factors on the heart sound signals.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a heart sound acquisition device based on a micro acceleration sensor.
Background
The heart sound signal is one of important physiological signals of a human body, and the generation mechanism of the heart sound signal can well reflect heart activity, blood flow and health conditions of the heart. The sound signal detection and analysis can accurately judge the heart sound signal, and can discover cardiovascular diseases in advance, thus being an indispensable means for knowing the states of heart and blood vessels.
The heart sound signal contains a lot of information of cardiovascular lesions, and the heart auscultation is simply relied on to judge whether the cardiovascular disease is healthy or not. The electrocardiographic examination widely used at present is the best detection method for the time-varying property and the conductivity of the heart, but the heart cannot be detected that the alterative congenital heart valve is damaged, and the electrocardiographic examination is easy to be interfered by the outside. The mechanical disturbance of the heart caused by the lesions of the electrocardio-conductive tissue is not first reflected on the Electrocardiosignal (ECG), but is first reflected on the heart sound, which thus has diagnostic information that is not replaced by the electrocardiosignal.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heart sound acquisition device based on a micro acceleration sensor, which can acquire heart sound signals and display the heart sound signals in real time, and effectively avoid the interference of environmental factors on the heart sound signals.
In order to solve the problems, the technical scheme of the invention is as follows: heart sound collection system based on micro acceleration sensor, wherein: comprises a heart sound acquisition probe, a heart sound signal processing circuit and a PC end display which are electrically connected in sequence; the heart sound collection probe includes: the heart sound probe comprises a heart sound probe shell, a flexible film, a micro acceleration sensor, an elastic beam and an insulating liquid medium;
the flexible film is arranged at the opening of the heart sound probe close to one end of the skin of the human body and wraps the inner cavity of the heart sound probe shell;
the elastic beam is arranged in the inner cavity of the heart sound probe shell and vibrates along the axial direction of the heart sound probe shell;
the micro acceleration sensor is arranged on the elastic beam;
the insulating liquid medium is arranged in the inner cavity of the heart sound probe shell, and the elastic beam and the micro acceleration sensor are immersed in the insulating liquid medium;
the micro acceleration sensor is electrically connected with the signal input end of the heart sound signal processing circuit through a signal wire, and the signal output end of the heart sound signal processing circuit is electrically connected with the PC end display through a signal wire;
the heart sound signal processing circuit comprises a filter circuit, a signal amplifying circuit and an AD conversion device; the signal output end of the micro acceleration sensor is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the input end of the signal amplifying circuit, and the output end of the signal amplifying circuit is connected to the input end of the AD conversion device.
Further, the flexible film is made of butyronitrile; the elastic beam is made of latex.
By adopting the technical scheme, the heart sound signals generated when the heart vibrates can be acquired through the vibration of the micro acceleration sensor, and the heart sound signals are displayed on the PC display in real time; the flexible film can be attached to the skin of a human body in a full area, heart sound signals are directly transmitted to the micro acceleration sensor through the insulating liquid medium, and interference of external environment on the heart sound signals can be effectively avoided.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a schematic view of the installation of the present invention after removal of the flexible film;
fig. 3 is an exploded schematic view of the structure of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 to 3, in this embodiment, a heart sound collection device based on a micro acceleration sensor, wherein: comprises a heart sound acquisition probe, a heart sound signal processing circuit and a PC end display which are electrically connected in sequence; the heart sound collection probe includes: the heart sound probe comprises a heart sound probe shell 1, a flexible film 2, a micro acceleration sensor 3, an elastic beam 4 and an insulating liquid medium 5;
the flexible film 2 is arranged at an opening of the heart sound probe 1 near one end of the skin of the human body and wraps the inner cavity of the heart sound probe shell 1;
the elastic beam 4 is arranged in the inner cavity of the heart sound probe shell 1, and the elastic beam 4 vibrates along the axial direction of the heart sound probe shell 1;
the micro acceleration sensor 3 is arranged on the elastic beam 4;
the insulating liquid medium 5 is arranged in the inner cavity of the heart sound probe shell 1, and the elastic beam 4 and the micro acceleration sensor 3 are immersed in the insulating liquid medium 5;
the micro acceleration sensor 3 is electrically connected with the signal input end of the heart sound signal processing circuit through a signal wire, and the signal output end of the heart sound signal processing circuit is electrically connected with the PC end display through a signal wire;
the heart sound signal processing circuit comprises a filter circuit, a signal amplifying circuit and an AD conversion device; the signal output end of the micro acceleration sensor 3 is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the input end of the signal amplifying circuit, and the output end of the signal amplifying circuit is connected to the input end of the AD conversion device.
Further, the flexible film 2 is made of butyronitrile; the elastic beam 4 is made of latex.
When the heart sound collecting device is used, one end of the heart sound collecting probe, which is wrapped by the flexible film 2, is attached to the skin of the heart position of a patient, heart sound signals are transmitted to the elastic beam 4 through the flexible film 2 and the insulating liquid medium 5, the elastic beam 4 drives the micro acceleration sensor 3 to vibrate in one-dimensional direction so as to collect heart sound signals generated when the heart vibrates, the heart sound signals are converted into electric signals, the output electric signals are transmitted to the PC end display through the filter circuit and the signal amplifying circuit and then transmitted to the PC end display through the signal wire by the AD conversion device.
Claims (1)
1. Heart sound collection system based on little acceleration sensor, its characterized in that: comprises a heart sound acquisition probe, a heart sound signal processing circuit and a PC end display which are electrically connected in sequence; the heart sound collection probe includes: the heart sound probe comprises a heart sound probe shell (1), a flexible film (2), a micro acceleration sensor (3), an elastic beam (4) and an insulating liquid medium (5);
the flexible film (2) is arranged at the opening of the heart sound probe shell (1) close to one end of the skin of the human body and wraps the inner cavity of the heart sound probe shell (1);
the elastic beam (4) is arranged in the inner cavity of the heart sound probe shell (1), and the elastic beam (4) vibrates along the axial direction of the heart sound probe shell (1);
the micro acceleration sensor (3) is arranged on the elastic beam (4);
the insulating liquid medium (5) is arranged in the inner cavity of the heart sound probe shell (1), and the elastic beam (4) and the micro acceleration sensor (3) are immersed in the insulating liquid medium (5);
the micro acceleration sensor (3) is electrically connected with the signal input end of the heart sound signal processing circuit through a signal wire, and the signal output end of the heart sound signal processing circuit is electrically connected with the PC end display through a signal wire;
the heart sound signal processing circuit comprises a filter circuit, a signal amplifying circuit and an AD conversion device; the signal output end of the micro acceleration sensor (3) is connected to the input end of the filter circuit, the output end of the filter circuit is connected to the input end of the signal amplifying circuit, and the output end of the signal amplifying circuit is connected to the input end of the AD conversion device;
the flexible film (2) is made of butyronitrile; the elastic beam (4) is made of latex;
the flexible film (2) is attached to the skin of a human body in a full area, heart sound signals are transmitted to the elastic beam (4) through the flexible film (2) and the insulating liquid medium (5), the elastic beam (4) drives the micro acceleration sensor (3) to vibrate in one-dimensional direction so as to collect heart sound signals generated during heart vibration, and the heart sound signals are converted into electric signals, so that interference of external environment on the heart sound signals is effectively avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195234.5A CN110916715B (en) | 2019-11-28 | 2019-11-28 | Heart sound collecting device based on micro acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195234.5A CN110916715B (en) | 2019-11-28 | 2019-11-28 | Heart sound collecting device based on micro acceleration sensor |
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| Publication Number | Publication Date |
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| CN110916715A CN110916715A (en) | 2020-03-27 |
| CN110916715B true CN110916715B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911195234.5A Active CN110916715B (en) | 2019-11-28 | 2019-11-28 | Heart sound collecting device based on micro acceleration sensor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11240579B2 (en) | 2020-05-08 | 2022-02-01 | Level 42 Ai | Sensor systems and methods for characterizing health conditions |
| CN115736938A (en) * | 2022-11-17 | 2023-03-07 | 东南大学 | Multi-mode physiological signal acquisition device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4672977A (en) * | 1986-06-10 | 1987-06-16 | Cherne Industries, Inc. | Lung sound cancellation method and apparatus |
| US4672976A (en) * | 1986-06-10 | 1987-06-16 | Cherne Industries, Inc. | Heart sound sensor |
| US7424321B2 (en) * | 2005-05-24 | 2008-09-09 | Cardiac Pacemakers, Inc. | Systems and methods for multi-axis cardiac vibration measurements |
| US20070197927A1 (en) * | 2005-12-22 | 2007-08-23 | Physical Logic Ag | Method for detecting cardiovascular problems using micro or nano vibrations |
| US9138199B2 (en) * | 2012-12-03 | 2015-09-22 | Cardiac Pacemakers, Inc. | Method and apparatus for detecting subaudible cardiac vibrations |
| CN103738241A (en) * | 2013-12-23 | 2014-04-23 | 青岛润鑫伟业科贸有限公司 | Heartbeat detecting device |
| CN103738240A (en) * | 2013-12-23 | 2014-04-23 | 青岛润鑫伟业科贸有限公司 | Heartbeat detecting method |
| CN105232080B (en) * | 2015-09-17 | 2017-10-31 | 中北大学 | Visualization electronic type stethoscope based on MEMS sonic transducers |
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