CN203898346U - Wireless stethoscope for internal medicine - Google Patents
Wireless stethoscope for internal medicine Download PDFInfo
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- CN203898346U CN203898346U CN201420343834.8U CN201420343834U CN203898346U CN 203898346 U CN203898346 U CN 203898346U CN 201420343834 U CN201420343834 U CN 201420343834U CN 203898346 U CN203898346 U CN 203898346U
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- zigbee module
- microcontroller
- filtering
- mike
- receiver system
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The utility model provides a wireless stethoscope for the internal medicine. The wireless stethoscope comprises a sender system and a receiver system, wherein the sender system comprises a cardiophony head, a microphone, a filtering and power amplifier, a microcontroller with an A/D conversion function and a Zigbee module; the receiver system comprises a Zigbee module, a microcontroller, a D/A converter and a power amplifier; and the Zigbee module in the receiver system receives signals sent by the Zigbee module in the sender system. During an the internal medicine diagnosis and treatment process, heart sound signals can be sent wirelessly by the wireless stethoscope, when more than one receiver exist, more than one doctor can hear the heart sounds of a patient, and the diagnosis accuracy can be increased; and meanwhile, the system can store signal files in a computer for future reference, and the wireless stethoscope has the characteristics of high precision and low power consumption.
Description
Technical field
This utility model relates to medical instruments field, especially a kind of Multifunctional internal medicine wireless stethoscope.
Background technology
In internal medicine diagnosis process, auscultation is the indispensable routine examination means of clinician, and stethoscope is the acoustics medical apparatus and instruments of medically commonly using, and doctor often carrys out the state of evaluate cardiac function and respiratory system by the method for auscultation.At present, the cardiophony of main clinical practice is the stethoscope that a kind of mechanical precision is low, and such stethoscope is carrying out when hear sounds is analyzed having more drawback: a large amount of heart components is low-frequency sound, is not easy it to carry out sound collection; Easily be subject to the impact of entity doctor and measurement environment; Lack quantitative analysis preconditioning technique and combine the technology of diagnosis.
This utility model, in order to overcome above-mentioned defect, has carried out useful improvement.
Utility model content
The purpose of this utility model is to solve above-mentioned deficiency of the prior art, and a kind of Multifunctional internal medicine wireless stethoscope that can integrate the functions such as auscultation and electrocardiosignal monitoring is provided.
To achieve these goals, this utility model is by the following technical solutions:
A kind of internal medicine wireless stethoscope, comprise emission system and receiving system, it is characterized in that: described emission system comprises cardiophony head, mike, microcontroller and Zigbee module with AD conversion, filtering and power amplification circuit, described receiver system comprises Zigbee module, microcontroller, DA transducer and power amplifier, Zigbee module in described receiver system receives the signal of launching from transmitter system Zigbee module, described cardiophony head, mike, filtering and power amplification circuit, microcontroller with AD conversion is connected successively with Zigbee module, in mike and filtering and power amplification circuit, be also connected with phonocandiograph preamplifier, described filtering is also connected with PC with power amplification circuit, described PC is also provided with photographic head, described PC is connected with Wav file server, Zigbee module in described receiver system, microcontroller, DA transducer and power amplifier are linked in sequence successively, described power amplifier is also connected with speaker, microcontroller in described receiver system is PIC16f873 microprocessor, 12 bit pads that described DA transducer is MCP4822, described mike is MEMS mike, described phonocandiograph preamplifier is integrated operational amplifier, amplifier in described filtering and power amplification circuit is LM386 amplifier.
The beneficial effects of the utility model: in internal medicine diagnosis process, use this device not only cardiechema signals can be carried out to wireless transmission, when having the receptor of surpassing, will have more than a doctor can hear patient's hear sounds, it will increase the accuracy of diagnosis.Meanwhile, this system can also be stored in its signal file in computer for future reference to do, and has precision feature high, low in energy consumption.
Accompanying drawing explanation
The transmitter architecture figure of Fig. 1 this utility model embodiment;
The receiver structure figure of Fig. 2 this utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, this utility model is further described.
Embodiment of the present utility model is with reference to shown in Fig. 1-2,
Hear sounds is in cardiac cycle, the sound that the mechanical vibration that the factors such as myocardial contraction, valve switching, blood flow cause produce.Each cardiac cycle can produce four hear sounds.The vibration that first heart sound produces during by ventricular systole causes, is that ventricle starts the sign shrinking; Second heart sound is that the vibration while closing due to arterial valve comes, and is the sign that ventricle starts diastole; In third heart sound Duo adolescence, produce, the vibration while thinking to expand due to ventricle wall causes; Fourth heart sound can be described as atrial heart sound, is that the vibration during due to atrial systole produces.
System design comprises two large divisions: transmitter and receiver.Fig. 1 has shown the system architecture of transmitter.This transmitter system mainly consists of following four parts: microcontroller and (4) the Zigbee module that change with AD (1) cardiophony head and mike, (2) filtering and power amplifier, (3).
Front-end circuit is for collection and the pretreatment of cardiechema signals.Conventionally effectively human body cardiechema signals frequency is 0～600Hz, and cardiophony head and MEMS mike convert an electronic signal to for the sound that heart beating is produced.Signal processing circuit is comprised of three parts, is mainly amplifying circuit, filter circuit and the second amplifying circuit.What from MEMS mike, export is very faint ac small signal, the amplitude of cardiechema signals is about: 30-60mV, the signal of this size can not meet the requirement of filtration module, must carry out the elementary processing and amplifying of signal, and that the elementary amplification of signal adopts is integrated operational amplifier μ A741.Because hear sounds frequency is lower, therefore can the whole filterings of the signal more than 500Hz by frequency when signal amplifies, improve the capacity of resisting disturbance of system.In the design, still adopt integrated transporting discharging μ A741 to form suitable low-pass filter circuit.After processing after filtering, the cardiechema signals that we obtain is purer, but the size of signal still can not meet the requirement of power amplifier, so be necessary filtered cardiechema signals to carry out processing and amplifying, what native system adopted at this moment is LM386 amplifier again.
This signal can be admitted to mould/number conversion mouth of microcontroller chip PIC18f2423, is changed into digital signal, and PIC18f2423 microcontroller has following characteristics here: the operating frequency of 0-40MHz; The sheet internal program memorizer of 16Kb; 768 byte data memorizeies; 12-bit ADC (10 input channel); SSP-USART serial communication.In the design, Zigbee wireless transport module adopts JN5148.This module is a super low-power consumption for JenNetZigBee network application, high-performance surface mount module.This module has the feature of high speed, large capacity and wireless transmission, and its operating frequency is 2.4GHz, and message transmission rate is 250kbps.Cardiechema signals (analogue signal) after front-end circuit is processed, sends to computer by auxiliary input pin by this audio signal and stores and analyze with the form of wav file.
Fig. 2 has shown receiver system.Hardware designs comprises following receiving unit: Zigbee module, microcontroller, DA transducer and power amplifier.Zigbee module receives from the signal of transmitter aloft and is sent to microprocessor.Because the signal directly receiving exists in digital form, so we want to hear physical sound by speaker, just must first convert thereof into corresponding analogue signal.Adopt 12 DA transducers of PIC16f873 microprocessor and MCP4822 herein.This system can utilize the audio-video interface of network and computer that the waveform of its cardiechema signals and sound are objectively reacted to auscultation doctors different on geographical position.
The above embodiment has only been expressed a kind of embodiment of the present utility model, but can not therefore be interpreted as the restriction to this utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (1)
1. an internal medicine wireless stethoscope, comprise transmitter system and receiver system, it is characterized in that: described transmitter system comprises cardiophony head, mike, microcontroller and Zigbee module with AD conversion, filtering and power amplification circuit, described receiver system comprises Zigbee module, microcontroller, DA transducer and power amplifier, Zigbee module in described receiver system receives the signal of launching from transmitter system Zigbee module, described cardiophony head, mike, filtering and power amplification circuit, microcontroller with AD conversion is connected successively with Zigbee module, in mike and filtering and power amplification circuit, be also connected with phonocandiograph preamplifier, described filtering is also connected with PC with power amplification circuit, described PC is also provided with photographic head, described PC is connected with Wav file server, Zigbee module in described receiver system, microcontroller, DA transducer and power amplifier are linked in sequence successively, described power amplifier is also connected with speaker, microcontroller in described receiver system is PIC16f873 microprocessor, 12 bit pads that described DA transducer is MCP4822, described mike is MEMS mike, described phonocandiograph preamplifier is integrated operational amplifier, amplifier in described filtering and power amplification circuit is LM386 amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343834.8U CN203898346U (en) | 2014-06-19 | 2014-06-19 | Wireless stethoscope for internal medicine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420343834.8U CN203898346U (en) | 2014-06-19 | 2014-06-19 | Wireless stethoscope for internal medicine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203898346U true CN203898346U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201420343834.8U Expired - Fee Related CN203898346U (en) | 2014-06-19 | 2014-06-19 | Wireless stethoscope for internal medicine |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105286910A (en) * | 2015-11-27 | 2016-02-03 | 山东中弘信息科技有限公司 | Intelligent stethoscope |
| CN107260204A (en) * | 2017-05-27 | 2017-10-20 | 陈凤萍 | A kind of inexpensive multi-function stethoscope |
| CN109717897A (en) * | 2017-10-27 | 2019-05-07 | 榆林学院 | A kind of radio electron echometer based on Zigbee |
| CN112617885A (en) * | 2020-10-30 | 2021-04-09 | 皖江工学院 | Electronic stethoscope suitable for multi-person simultaneous inquiry, working method and auscultation system |
-
2014
- 2014-06-19 CN CN201420343834.8U patent/CN203898346U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105286910A (en) * | 2015-11-27 | 2016-02-03 | 山东中弘信息科技有限公司 | Intelligent stethoscope |
| CN107260204A (en) * | 2017-05-27 | 2017-10-20 | 陈凤萍 | A kind of inexpensive multi-function stethoscope |
| CN109717897A (en) * | 2017-10-27 | 2019-05-07 | 榆林学院 | A kind of radio electron echometer based on Zigbee |
| CN112617885A (en) * | 2020-10-30 | 2021-04-09 | 皖江工学院 | Electronic stethoscope suitable for multi-person simultaneous inquiry, working method and auscultation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Ding Yingchao Document name: Notification of Acceptance of Patent Application |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Ding Chao Document name: Review of business letter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150619 |
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| EXPY | Termination of patent right or utility model |