CN1332630C - Novel household electrocardiograph - Google Patents
Novel household electrocardiograph Download PDFInfo
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- CN1332630C CN1332630C CNB2004100727192A CN200410072719A CN1332630C CN 1332630 C CN1332630 C CN 1332630C CN B2004100727192 A CNB2004100727192 A CN B2004100727192A CN 200410072719 A CN200410072719 A CN 200410072719A CN 1332630 C CN1332630 C CN 1332630C
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Abstract
The present invention discloses a novel household electrocardiograph. The novel household electrocardiograph uses a microprocessor chip integrated with a sigma-delta type analog-to-digital converter with high resolution and combines a parallel connection differential amplifier provided with a common mode drive and a differential input sigma-delta type analog-to-digital converter with a high common-mode rejection ratio to form a simpl electrocardio signal testing circuit with the high common-mode rejection ratio, high performance and low cost without debugging. A high integration microprocessor integrated with the sigma-delta type analog-to-digital converter with high resolution, a digital-to-analog converter, a communication interface and a plurality of universal I/O ports is used for processing and analyzing a collected electrocardio signal. The peripheral devices integrated by the microprocessor is fully used for forming a multifunctional communication interface which can output and display an electrocardiogram in the modes of a liquid crystal display, a printer, a telephone, a modem, a personal computer, a common electrocardiograph, etc. The novel household electrocardiograph is convenient for a user to measure and observe the electrocardio signal and transmit the electrocardiogram to a doctor or a hospital at any time and anywhere. The present invention has the advantages of simple structure, no need of debugging, good performance, excellent technology, multiple electrocardiogram output modes and low cost.
Description
Technical field
The present invention relates to medical instrument, especially a kind of electrocardiograph that is applied to family.
Background technology
Electrocardiographic examination has important use and is worth in medical research and clinical diagnosis.Because cardiopathic outbreak has sporadic, particularly heart disease is early stage, capturing unusual electrocardiosignal all has very big meaning for diagnosis and treatment, thereby has attracted numerous scholars and engineers and technicians' research to be convenient to the domestic miniature electrocardiograph that people detect voluntarily at home.Utility model patent (portable dynamic heart alarm as the Yu Zhanhe design, the patent No. 94245445.6), utility model patent (the portable cardiac monitor of Shen Jianmin design, the patent No. 03210019.1), the fair and clear utility model patent of design that waits is (based on the portable ecg monitor of digital signal processor, application number 02209381.8), utility model patent (the household electrocardioscanner of Zhu Yunhui design, the patent No. 02239896.1), utility model patent (the domestic electrocardiographicoscilloscope oscilloscope of design such as Li Gang, application number 00120953.1), utility model patent (the household electrocardiogram device of Yang Zhenye design, patent No. 01215394.X), utility model patent (the micro computer electrocardiogram monitor of Zhang Huisheng design, the patent No. 00257745.3), utility model patent (the electrocardiographic recording phone transmission device of design such as Yue Zhonggui, the patent No. 00241611.5), utility model patent (the intelligent miniature electrocardiac monitor of design such as You Jingyu, the patent No. 93216650.4), utility model patent (the electrocardio artificial intelligence monitor device of household PC of design such as Jin Dengnan, application number 02260439.1), utility model patent (the dynamic electrocardioscanner of design such as Zou Fan, application number 93245458.5), utility model patent (the digital electrocardiosignal monitoring device of Wang Xiangsheng design, the patent No. 99242737.1), the utility model patent of Wang Xuesong design (a kind of digital phone transmission health of heart scanning device, application number 02252598.X), utility model patent (a kind of electrocardiogram monitor of Zhan Yiju design, the patent No. 00238037.4), the utility model patent (mobile phone/handset type electrocardio-monitor, application number 03228640.6) of design such as Gu Jukang.The common defects of above-mentioned design is circuit structure complexity, debug difficulties, manufacturability is poor, the way of output is single, cost performance is low.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, need not debug, novel household electrocardiograph.
In order to solve the problems of the technologies described above be, novel household electrocardiograph of the present invention comprises the electrode that is used to gather bioelectrical signals, the input protection circuit with overvoltage protection and simple filter function that connects successively by lead, differential amplifier in parallel, ∑-Δ pattern number converter, microprocessor CPU and the keyboard with common mode driving, and described microprocessor CPU also is connected with liquid crystal display; Be connected with driven-right-leg circuit between described electrode and the described differential amplifier in parallel, driven-right-leg circuit extracts the anti-phase amplification rear drive of common-mode signal public electrode from differential amplifier in parallel; Described ∑-Δ pattern number converter is used for mimic bioelectrical signals is converted to high-resolution digital signal, and described microprocessor CPU control ∑-Δ pattern number converter carries out analog digital conversion, liquid crystal display demonstration ecg wave form and versatile interface output and transmission electrocardiosignal etc. are handled, controlled to electrocardiosignal.
Described driven-right-leg circuit is made of operational amplifier A 4, resistance R 5, R6 and capacitor C 3, is used for the anti-phase driving public electrode of the common-mode signal of described differential amplifier in parallel, with further inhibition common-mode signal.
Described differential amplifier in parallel is made of operational amplifier A 1 and A2, the resistance R 1 of two similar resistance and R2 and operational amplifier A 3 constitute common-mode signal and extract drive circuit, and the output signal that common-mode signal is extracted drive circuit exports described driven-right-leg circuit to.Be connected with high pass filter between described differential amplifier in parallel and described ∑-Δ pattern number converter, high pass filter is made up of capacitor C 1 and C2, resistance R 3 and R4, is used to suppress the interference of polarizing voltage and baseline drift; The output signal of common-mode signal extraction drive circuit exports the resistance R 3 of described high pass filter, the common port of R4 in the described differential amplifier in parallel.
Described microprocessor CPU is connected with mass storage.
Described microprocessor CPU is connected with versatile interface by digital to analog converter, in order to output or transmission electrocardiosignal.
Described microprocessor CPU is connected with speaker by the I/O interface, as prompting, warning and sound coupling phone transmission ECG signal.
Compared with prior art, the present invention has following beneficial effect: (one) the present invention is simple in structure, excellent performance, good manufacturability, and the electrocardiogram way of output is many; (2) owing to adopt and to have differential amplifier in parallel that common mode drives and the differential input ∑-Δ pattern number converter with high cmrr, circuit simply, need not debug does not have high common mode rejection ratio; (3) make full use of the integrated peripheral hardware of microprocessor and form multi-functional communication interface, make things convenient for the user to measure and observe electrocardiosignal whenever and wherever possible and transmit electrocardiogram and give doctor or hospital.
Description of drawings
Fig. 1 is the circuit diagram of novel household electrocardiograph of the present invention.
Reference numeral:
1 is that electrode 2 is differential amplification in parallel for the line 3 that leads for input protection circuit 4
5 is that ∑-Δ pattern number converter 6 is digital to analog converter for liquid crystal display (LCD) 7 for microprocessor (CPU) 8
9 is that versatile interface 10 is keyboard for driven-right-leg circuit 11 for mass storage 12
13 is that I/O interface 14 is speaker
The specific embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
The embodiment one of novel household electrocardiograph of the present invention:
As shown in Figure 1; pick up human ecg signal by electrode 1; to input protection circuit 3, input protection circuit 3 prevents that electrostatic high-pressure and defibrillation high pressure from damaging circuit by the line that leads, and has differential amplifier in parallel 4 that common mode drives and is input to ∑-Δ pattern number converter 5 with signal damping, after amplifying.
Differential amplifier in parallel 4 with common mode driving constitutes differential amplifier in parallel by operational amplifier A 1 and A2, resistance R 1 and R2 and operational amplifier A 3 formation common-mode signals extraction drive circuits that two similar resistance are arranged, take out common-mode signal the common port of differential high pass filter (respectively by C1 and R3, C2 and R4) is driven, can avoid the interference of the asymmetric common mode variation mould that causes that is difficult to avoid between C2 and the R4 being introduced owing to C1 and R3 effectively.
∑-Δ pattern number converter 5 is used for mimic bioelectrical signals is converted to high-resolution digital signal, the work of microprocessor (CPU) 7 control ∑-Δ pattern number converters 5, digital signal to ∑-Δ pattern number converter output carries out frequency compensation simultaneously, to eliminate this unevenness in passband of ∑-Δ pattern number converter.Microprocessor (CPU) 7 is as the operation of control hard core control whole instrument.
Driven-right-leg circuit 10 by operational amplifier A 4, R5 and R6 and C3 constitute with the anti-phase driving public electrode of common-mode signal, can further suppress common-mode signal.
Liquid crystal display (LCD) 6 is connected to microprocessor (CPU) 7, shows ecg wave form and finish human computer conversation's function under the control of microprocessor (CPU) 7.
The versatile interface of formation together 9 of digital to analog converter 8 and I/O interface 13 possesses multiple output modes such as analogue signal output, printer output, compunication output, finishes the output or the transmission of the electrocardiogram (signal) of following form:
1. external printer is printed electrocardiogram;
2. external analog recorder or ordinary electrocardiogram machine are traced electrocardiogram;
3. transmit electrocardiogram by RS232 serial ports or USB to PC or miscellaneous equipment;
4. transmit electrocardiograph by modem and INTERNET network to hospital;
5. directly transmit electrocardiogram (signal) by public telephone network in PWM (pulsewidth modulation) signal of telecommunication mode.
I/O interface 13 also can adopt PWM (pulsewidth modulation) voice mode by the phone transmission electrocardiosignal by speaker 14.
Speaker 14 is simultaneously as the voice suggestion and the usefulness of reporting to the police.
Mass storage 11 adopts FLASH memorizer or other nonvolatile memory, as the AT25F2048 of Atmel company, the SST25VF020 of SST company etc., is used to preserve electrocardiosignal.
Keyboard 12 is used to control and be provided with the work of electrocardiograph.
Microprocessor (CPU) 7 adopts the microprocessor chip of integrated high resolution sigma-Δ pattern number converter, as the ADuC847 of U.S. ADI company, the devices such as MSC1212 of American TI Company.
Claims (7)
1, a kind of novel household electrocardiograph, it is characterized in that, it comprises the electrode that is used to gather bioelectrical signals, the input protection circuit with overvoltage protection and simple filter function that connects successively by lead, differential amplifier in parallel, sigma-delta pattern number converter, microprocessor CPU and the keyboard with common mode driving, and described microprocessor CPU also is connected with liquid crystal display; Be connected with driven-right-leg circuit between described electrode and the described differential amplifier in parallel, driven-right-leg circuit extracts the anti-phase amplification rear drive of common-mode signal public electrode from differential amplifier in parallel; Described sigma-delta pattern number converter is used for mimic bioelectrical signals is converted to high-resolution digital signal.
2, a kind of novel household electrocardiograph according to claim 1, it is characterized in that, described driven-right-leg circuit is made of operational amplifier A 4, resistance R 5, R6 and capacitor C 3, be used for the anti-phase driving public electrode of the common-mode signal of described differential amplifier in parallel, with further inhibition common-mode signal.
3, a kind of novel household electrocardiograph according to claim 1, it is characterized in that, described differential amplifier in parallel is made of operational amplifier A 1 and A2, the resistance R 1 of two similar resistance and R2 and operational amplifier A 3 constitute common-mode signal and extract drive circuit, and the output signal that common-mode signal is extracted drive circuit exports described driven-right-leg circuit to.
4, a kind of novel household electrocardiograph according to claim 2, it is characterized in that, between described differential amplifier in parallel and described sigma-delta pattern number converter, be connected with high pass filter, high pass filter is made up of capacitor C 1 and C2, resistance R 3 and R4, is used to suppress the interference of polarizing voltage and baseline drift; The output signal of common-mode signal extraction drive circuit exports the resistance R 3 of described high pass filter, the common port of R4 in the described differential amplifier in parallel.
5, a kind of novel household electrocardiograph according to claim 1 is characterized in that, described microprocessor CPU is connected with mass storage.
6, a kind of novel household electrocardiograph according to claim 1 is characterized in that, described microprocessor CPU is connected with versatile interface by digital to analog converter, in order to output or transmission electrocardiosignal.
7, a kind of novel household electrocardiograph according to claim 1 is characterized in that, described microprocessor CPU is connected with speaker by the I/O interface, as prompting, warning and sound coupling phone transmission ECG signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100727192A CN1332630C (en) | 2004-11-15 | 2004-11-15 | Novel household electrocardiograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100727192A CN1332630C (en) | 2004-11-15 | 2004-11-15 | Novel household electrocardiograph |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1602802A CN1602802A (en) | 2005-04-06 |
| CN1332630C true CN1332630C (en) | 2007-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100727192A Expired - Fee Related CN1332630C (en) | 2004-11-15 | 2004-11-15 | Novel household electrocardiograph |
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| Country | Link |
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| CN (1) | CN1332630C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363871C (en) * | 2006-02-22 | 2008-01-23 | 天津大学 | Computer keyboard capable of measuring electrocardiogram |
| CN102144922A (en) * | 2011-04-15 | 2011-08-10 | 北京正业德盈科技有限公司 | Physiological signal acquisition electrode and acquisition amplification circuit |
| CN102178521A (en) * | 2011-04-15 | 2011-09-14 | 北京正业德盈科技有限公司 | Physiological signal monitoring device |
| CN115281684A (en) * | 2022-08-04 | 2022-11-04 | 长沙兆兴博拓科技有限公司 | PCBA component for electrocardio intelligent measurement |
Citations (4)
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| CN2193717Y (en) * | 1994-06-10 | 1995-04-05 | 北京市海淀区贝斯特经营公司 | Standard 12-leads instantaneous dynamic electrocardiograph |
| CN2215894Y (en) * | 1994-12-29 | 1995-12-27 | 杨继明 | Notebook type intelligent cardioelectric monitoring ECG machine |
| CN1291465A (en) * | 2000-08-02 | 2001-04-18 | 天津市四通新技术开发公司 | Domestic electrocardiographic oscilloscope |
| US6654631B1 (en) * | 2001-07-12 | 2003-11-25 | Anil Sahai | Method and apparatus for a hand-held computer EKG device |
-
2004
- 2004-11-15 CN CNB2004100727192A patent/CN1332630C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2193717Y (en) * | 1994-06-10 | 1995-04-05 | 北京市海淀区贝斯特经营公司 | Standard 12-leads instantaneous dynamic electrocardiograph |
| CN2215894Y (en) * | 1994-12-29 | 1995-12-27 | 杨继明 | Notebook type intelligent cardioelectric monitoring ECG machine |
| CN1291465A (en) * | 2000-08-02 | 2001-04-18 | 天津市四通新技术开发公司 | Domestic electrocardiographic oscilloscope |
| US6654631B1 (en) * | 2001-07-12 | 2003-11-25 | Anil Sahai | Method and apparatus for a hand-held computer EKG device |
Non-Patent Citations (7)
| Title |
|---|
| 基于USB接口的心电信号数据采集系统 田建君，国外电子元器件 2004 * |
| 心电信号实时数据采集记录系统 李正军 蒋阅峰 杨燕红，电子测量与仪器学报，第10卷第4期 1996 * |
| 新型的高性能生物电放大器 李刚 林凌，电子产品世界 2002 * |
| 新型的高性能生物电放大器 李刚，林凌，电子产品世界 2002 * |
| 高性能多通道生物电放大器 李刚 虞启连 于学敏，天津大学报，第33卷第5期 2000 * |
| 高性能多通道生物电放大器 李刚 虞启连 于学敏，天津大学报，第33卷第5期 2000;高性能多通道生物电放大器 李刚，虞启链，于学敏，天津大学报，第33卷第5期 2000;基于USB接口的心电信号数据采集系统 田建君，国外电子元器件 2004;新型的高性能生物电放大器 李刚 林凌，电子产品世界 2002;新型的高性能生物电放大器 李刚，林凌，电子产品世界 2002;心电信号实时数据采集记录系统 李正军 蒋阅峰 杨燕红，电子测量与仪器学报，第10卷第4期 1996 * |
| 高性能多通道生物电放大器 李刚，虞启链，于学敏，天津大学报，第33卷第5期 2000 * |
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| CN1602802A (en) | 2005-04-06 |
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Granted publication date: 20070822 Termination date: 20091215 |