CN201691917U - A Portable Network Home ECG Monitoring Device Based on USB - Google Patents

Abstract

Translated fromChinese

本实用新型公开一种基于USB的便携网络式家用心电监护装置，包括心电导联电路单元、差动放大电路单元、滤波电路单元、后级放大电路单元、中央处理器、时钟电路单元、液晶显示电路单元、报警电路单元、导联脱落检测电路和U盘存储电路单元，检测人体心电信号的心电导联电路单元通过导联线连接于人体皮肤，差动放大电路单元与心电导联电路单元进行信号连接，滤波电路连接于差动放大电路单元与后级放大电路单元之间，后级放大电路与中央处理器连接，导联脱落检测电路连接于心电导联电路单元与中央处理器之间，本实用新型具有数据大容量存储和自由转存，佩戴方便可靠，装置造价低廉，患者的使用自由度增大的优点。

The utility model discloses a portable network-based household ECG monitoring device based on USB, which comprises an ECG lead circuit unit, a differential amplifier circuit unit, a filter circuit unit, a post-amplifier circuit unit, a central processing unit, a clock circuit unit, a liquid crystal Display circuit unit, alarm circuit unit, lead off detection circuit and U disk storage circuit unit, ECG lead circuit unit for detecting human ECG signals connected to human skin through lead wires, differential amplifier circuit unit and ECG lead circuit The unit is connected to the signal, the filter circuit is connected between the differential amplifier circuit unit and the post-stage amplifier circuit unit, the post-stage amplifier circuit is connected to the central processing unit, and the lead-off detection circuit is connected between the ECG lead circuit unit and the central processing unit. In the meantime, the utility model has the advantages of large-capacity data storage and free transfer, convenient and reliable wearing, low device cost, and increased freedom of use by patients.

Description

Translated fromChinese

一种基于USB的便携网络式家用心电监护装置A Portable Network Home ECG Monitoring Device Based on USB

技术领域technical field

本实用新型属于一种可随身携带的长时间测量心电图形的监控装置，尤其涉及一种与Internet网络结合并在基于USB技术传输的基础上形成心电数据的实时采集和心电数据的网络化存储的智能监控及分析装置。The utility model belongs to a portable long-term monitoring device for measuring electrocardiographic graphs, in particular to a real-time collection of electrocardiographic data and networked electrocardiographic data combined with the Internet and based on USB technology transmission. Storage intelligent monitoring and analysis device.

背景技术Background technique

随着人口老龄化和人民生活的提高，心血管的发病率逐步增高，并且已成为威胁人类健康的主要疾病。心血管疾病具有病情隐蔽、发展缓慢、发病危险性高的特点，它对心脏病患者的危害极大，是威胁人类生命安全的一大杀手。在各类监护参数中，心脏的活动是一个至关重要的生理参数，特别是对患有严重心血管病的病人，心脏病发病时一股具有短暂性、突发性和危险性的特点，为了阻止病人的病情恶化，所以有必要对患者的心电图进行长时间实时监测，实现及时抢救和疾病预报，目前由于我国医疗资源仍然十分紧张，在加速发展合作医疗大政策下，远程医疗和网络医疗无疑是解决患者这一问题的有效办法。因此，可供心脏病人使用的便携式心脏监护装置系统有着广泛的应用前景。With the aging of the population and the improvement of people's lives, the incidence of cardiovascular diseases has gradually increased, and has become a major disease that threatens human health. Cardiovascular disease has the characteristics of hidden disease, slow development, and high risk of onset. It is extremely harmful to heart disease patients and is a major killer that threatens the safety of human life. Among various monitoring parameters, the activity of the heart is a vital physiological parameter, especially for patients with severe cardiovascular diseases, the onset of heart disease is generally characterized by transient, sudden and dangerous, In order to prevent the patient's condition from deteriorating, it is necessary to monitor the patient's electrocardiogram in real time for a long time to achieve timely rescue and disease forecast. At present, due to the shortage of medical resources in our country, under the policy of accelerating the development of cooperative medical care, telemedicine and network medicine It is undoubtedly an effective way to solve this problem of patients. Therefore, the portable cardiac monitoring device system that can be used by heart patients has a wide application prospect.

24小时心电监护和分析系统又称Holter系统，首台磁带记录式的长时间连续心电图记录装置，是1957年美国物理学博士Norman J Holter发明的，它可以记录人体24h或者更长时间的心电动态变化信息在经过计算机系统回放、处理和分析、由打印机打印输出心电图，通过动态心电图能够发现短暂性或一过性的异常心电变化，了解患者的发病机理和发病情况，它的出现对心电信号的监控具有重要的意义。HOLTER系统发展到今天，其已经成为心血管疾病诊断领域中的实用、高效、无创、安全、准确、可重复性强的重要检查方法。The 24-hour ECG monitoring and analysis system, also known as the Holter system, is the first tape-recording long-term continuous ECG recording device, which was invented by Norman J Holter, a doctor of physics in the United States in 1957. The electrodynamic change information is played back, processed and analyzed by the computer system, and the electrocardiogram is printed out by the printer. Through the dynamic electrocardiogram, transient or transient abnormal ECG changes can be found, and the pathogenesis and condition of the patient can be understood. The monitoring of ECG signal is of great significance. Today, the HOLTER system has become a practical, efficient, non-invasive, safe, accurate and repeatable important inspection method in the field of cardiovascular disease diagnosis.

传统式的HOLTER系统包含两部分：一部分是带在病人身上的慢速磁带记录盒；另一部分是回放分析系统。目前的固态HOLTER系统，以美国HP公司为代表，它是把心电信号转换成数字信号后存储在芯片上，可避免之前因为马达变速、定期保养和更换磁带而引起的磁带记录不全的一大难题。但是这类系统仍然存在以下几个方面问题：1、记录盒内内存有限，不能完整记录长时间数据，容易造成丢失大量信息；2、Holter系统仍属昂贵设备，患者每次佩戴需缴纳100～200元费用，而且每佩戴一次和摘掉一次都需要患者去医院，对患者来说，佩戴使用既不方便又不经济；3、医院为Holter系统采集数据的分析和报告站，完成数据的采集存储和分析报告的发放，需要很大的硬盘存储量和专门的负责部门，不仅造成医院此方面工作量大，耗时又耗材，而且病人还不能及时对自己的病情发展有所了解和掌握。The traditional HOLTER system consists of two parts: one part is a slow-speed magnetic tape recorder carried on the patient; the other part is a playback analysis system. The current solid-state HOLTER system, represented by the American HP company, converts the ECG signal into a digital signal and stores it on the chip, which can avoid the incomplete tape recording caused by the motor speed change, regular maintenance and tape replacement. problem. However, this type of system still has the following problems: 1. The memory in the recording box is limited, and it is impossible to completely record long-term data, which is easy to cause a large amount of information loss; 2. The Holter system is still an expensive device, and patients need to pay 100~ It costs 200 yuan, and the patient needs to go to the hospital every time it is worn and removed. For patients, it is inconvenient and uneconomical to wear and use; 3. The hospital is the analysis and reporting station for the Holter system to collect data and complete the data collection The distribution of storage and analysis reports requires a large amount of hard disk storage and a dedicated department in charge, which not only results in a heavy workload, time-consuming and consumable materials for the hospital, but also makes patients unable to understand and grasp the development of their own conditions in a timely manner.

实用新型内容Utility model content

本实用新型的目的在于提供一种基于USB的便携网络式家用心电监护装置，以解决目前现有Holter记录盒存在的内存有限、佩戴使用费用贵以及不能在基于患者需求的基础上实时动态的让患者方便查看自己以往的心电波形数据、分析报告的问题。The purpose of the utility model is to provide a portable network-based household ECG monitoring device based on USB to solve the problems of limited memory, expensive wearing and use, and incapability of real-time dynamics based on the needs of patients in the existing Holter record box. It is convenient for patients to view their past ECG waveform data and analyze the reported problems.

本实用新型的目的是通过以下技术方案予以实现的：一种基于USB的便携网络式家用心电监护装置，包括心电导联电路单元、差动放大电路单元、滤波电路单元、后级放大电路单元、中央处理器、时钟电路单元、液晶显示电路单元、报警电路单元、导联脱落检测电路和U盘存储电路单元，其中检测人体心电信号的心电导联电路单元通过导联线连接于人体皮肤，差动放大电路单元与心电导联电路单元进行信号连接，滤波电路连接于差动放大电路单元与后级放大电路单元之间，后级放大电路与中央处理器连接，中央处理器与时钟电路单元、液晶显示电路单元、报警电路单元相连接，导联脱落检测电路连接于心电导联电路单元与中央处理器之间，中央处理器通过USB芯片电路与U盘存储电路单元连接、通过USB接口电路将信号送至联网的家用电脑。The purpose of this utility model is achieved by the following technical solutions: a portable network-based household ECG monitoring device based on USB, including an ECG lead circuit unit, a differential amplifier circuit unit, a filter circuit unit, and a post-stage amplifier circuit unit , a central processing unit, a clock circuit unit, a liquid crystal display circuit unit, an alarm circuit unit, a lead off detection circuit and a U disk storage circuit unit, wherein the ECG lead circuit unit for detecting human ECG signals is connected to the human skin through a lead wire , the differential amplifier circuit unit is connected to the ECG lead circuit unit for signals, the filter circuit is connected between the differential amplifier circuit unit and the subsequent amplifier circuit unit, the latter amplifier circuit is connected to the central processing unit, and the central processor is connected to the clock circuit The unit, the liquid crystal display circuit unit, and the alarm circuit unit are connected, and the lead off detection circuit is connected between the ECG lead circuit unit and the central processing unit, and the central processing unit is connected to the U disk storage circuit unit through the USB chip circuit, and the The circuit sends the signal to a networked home computer.

所述的心电导联电路单元包括：安置在人体皮肤表面的心电电极和用于连接电极和装置的导联线；导联方式采用模拟胸导联方式，电极线测定胸部三个特定位置与右下肢之间的心电电位差。The electrocardiographic lead circuit unit includes: electrocardiographic electrodes placed on the surface of human skin and lead wires used to connect the electrodes and devices; the lead mode adopts the analog chest lead mode, and the electrode wires measure the relationship between three specific positions of the chest and Electrocardiographic potential difference between the right lower extremities.

所述的差动放大电路单元与心电导联电路单元相连接，是由3个运算放大器以及外围9个电阻组成，设置其增益为20，对心电导联电路单元所采集信号进行第一步放大。The differential amplifier circuit unit is connected with the ECG lead circuit unit, and is composed of 3 operational amplifiers and 9 peripheral resistors. The gain is set to 20, and the signal collected by the ECG lead circuit unit is amplified in the first step. .

所述的滤波电路单元为带通滤波器，与差动放大电路输出的放大信号单元连接，由1个运算放大器以及外围6个电阻和3个电容组成，通带频率范围在0.05Hz-34Hz之间。The filtering circuit unit is a band-pass filter, which is connected to the amplified signal unit output by the differential amplifier circuit, and is composed of 1 operational amplifier, 6 peripheral resistors and 3 capacitors, and the passband frequency range is between 0.05Hz-34Hz between.

所述的后级放大电路单元与滤波电路单元输出的滤波信号相连接，由1个运算放大器以及外围3个电阻组成。The post-amplification circuit unit is connected with the filter signal output by the filter circuit unit, and consists of an operational amplifier and three peripheral resistors.

所述的中央处理器，具有片内AD、片内定时器、片内看门狗及片内PWM发生器，与后级放大电路单元输出信号相连接，对与其相连的时钟电路单元、液晶显示电路单元、报警电路单元以及U盘存储电路单元管理和通信。Described central processing unit has on-chip AD, on-chip timer, on-chip watchdog and on-chip PWM generator, is connected with the post-stage amplifying circuit unit output signal, and is connected to the clock circuit unit, liquid crystal display Circuit unit, alarm circuit unit and U disk storage circuit unit management and communication.

所述的导联脱落检查电路与差动放大电路单元的输出信号相连接，包括2个运算放大器，外围6个固定阻值电阻、2个电位器和2个电解电容，导联脱落检查电路输出信号与中央处理器中断口相连接。The lead-off inspection circuit is connected to the output signal of the differential amplifier circuit unit, including 2 operational amplifiers, 6 peripheral fixed resistance resistors, 2 potentiometers and 2 electrolytic capacitors, and the lead-off inspection circuit outputs The signal is connected to the CPU interrupt port.

所述的时钟电路单元为可设定佩戴时间和观察佩戴时间的电路单元，由时钟电路和段式液晶显示电路组成，其中时钟电路包括1个时钟芯片PCF8563以及由4个电阻、3个独石电容和1个晶振，与中央处理器通过单片机的中断口进行连接，段式液晶包括时分秒显示，与中央处理器通过一组I\O口进行连接。The clock circuit unit is a circuit unit that can set the wearing time and observe the wearing time, and is composed of a clock circuit and a segment liquid crystal display circuit, wherein the clock circuit includes a clock chip PCF8563 and consists of 4 resistors, 3 monolithic Capacitor and a crystal oscillator are connected with the central processing unit through the interrupt port of the single-chip microcomputer. The segment liquid crystal includes hour, minute and second display and is connected with the central processing unit through a group of I\O ports.

所述的液晶显示电路单元为一可用于心电信号显示的电路单元，由1个字符式液晶和其外围电路组成，与中央处理器通过另一组I\O口进行连接。The liquid crystal display circuit unit is a circuit unit that can be used for electrocardiographic signal display, and is composed of a character liquid crystal and its peripheral circuit, and is connected with the central processing unit through another group of I\O ports.

所述的报警电路单元由1个蜂鸣器、1个场效应管以及外围上拉电阻组成或者由1个电阻和1个LED灯组成，其信号输入口与中央处理器中断口连接。The alarm circuit unit is composed of a buzzer, a field effect transistor and a peripheral pull-up resistor or a resistor and an LED light, and its signal input port is connected with the interrupt port of the central processing unit.

所述的家用联网电脑，与心电测试装置通过USB口的连接，通过联网功能将由USB接口转存至电脑硬盘的心电数据上传至医院心电信号分析系统调用和分析；通过以上技术方案可以看出，本实用新型与现有的Holter系统相比具有以下的优点和积极效果：1、数据的大容量存储和自由转存：通过使用U盘数据每日转存至电脑硬盘的方式，可以很好的解决以往记录盒记录数据容量不大，容易丢失数据的问题，在保证测试心电数据这个基本功能的基础上，还可以实现数据的大容量存储。The home networked computer is connected with the ECG testing device through the USB port, and the ECG data transferred to the computer hard disk by the USB interface is uploaded to the hospital ECG signal analysis system for calling and analyzing through the networking function; through the above technical solutions, Find out that the utility model has the following advantages and positive effects compared with the existing Holter system: 1, large-capacity storage and free transfer of data: by using the mode of U disk data transfer to the computer hard disk every day, you can It is a good solution to the problem that the recorded data capacity of the record box is not large and the data is easily lost. On the basis of ensuring the basic function of testing ECG data, it can also realize large-capacity storage of data.

2、佩戴方便可靠：基于USB的便携网络式家用HOLTER系统装置，由于其应用范围可扩充至家庭层面，患者通过使用说明即可自行佩戴；同时，由于其集成导联脱落检查电路、断电、无电等报警电路和液晶显示为一体，使用可靠安全。2. Convenient and reliable to wear: The portable network-based household HOLTER system device based on USB can be extended to the family level because of its application range, and patients can wear it by themselves through the instructions; at the same time, because of its integrated lead off inspection circuit, power failure, No electricity and other alarm circuits and liquid crystal display as a whole, reliable and safe to use.

3、装置造价低廉：基于USB的便携网络式家用心电监护装置的成本低廉，同时，由于免去了以租用或者治疗为手段而使用医院的Holter系统所产生的每次的使用费，因此可以产生长期的经济效益。3. The cost of the device is low: the cost of the portable network-based household ECG monitoring device based on USB is low. produce long-term economic benefits.

4、患者的使用自由度有所增大：患者可以根据装置自带的液晶显示屏随时观察心电信号波形，同时通过按键可以自行设定佩戴时间，而且利用联网对所采的数据通过联网的家用电脑进行分析，不仅患者的使用时间选择上自由度有所增加，同时通过家用联网电脑即可足不出户的及时了解自己的病情，能够在一定程度上实现心脏病的早期预测与发现。4. The degree of freedom of use of the patient has increased: the patient can observe the waveform of the ECG signal at any time according to the LCD screen that comes with the device, and at the same time can set the wearing time by themselves through the buttons, and use the network to monitor the collected data through the network. Home computer analysis not only increases the freedom of time selection for patients, but also allows them to know their own condition in time without leaving home through home networked computers, which can realize early prediction and detection of heart disease to a certain extent.

附图说明Description of drawings

图1是基于USB的便携网络式家用心电监护装置原理图；图2是本实用新型的前级差动放大电路图；图3是本实用新型的滤波电路图；图4是后级放大电路图；图5是USB驱动电路图；图6是本实用新型的导联脱落电路图；图7是本实用新型的时钟电路单元图；图8是本实用新型的LCD显示电路单元图；图9为本实用新型的键盘电路单元图；图10为本实用新型的报警电路单元图。Fig. 1 is a schematic diagram of a portable network type home ECG monitoring device based on USB; Fig. 2 is a front-stage differential amplifier circuit diagram of the present utility model; Fig. 3 is a filter circuit diagram of the present utility model; Fig. 4 is a post-stage amplifier circuit diagram; Fig. 5 is a USB drive circuit diagram; Fig. 6 is a circuit diagram of a lead shedding of the present utility model; Fig. 7 is a clock circuit unit diagram of the present utility model; Fig. 8 is a LCD display circuit unit diagram of the present utility model; Fig. 9 is a circuit diagram of the utility model Keyboard circuit unit diagram; Fig. 10 is the alarm circuit unit diagram of the utility model.

具体实施方式Detailed ways

以下结合附图对本实用新型作进一步的详细说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.

如图1所示，基于USB的便携网络式家用心电监护装置包括心电导联电路单元、差动放大电路单元、滤波电路单元、后级放大电路单元、中央处理器、时钟电路单元、液晶显示电路单元、报警电路单元、以及导联脱落检测电路和U盘存储电路单元，其中检测人体心电信号的导联电路单元通过导联线连接于人体皮肤上，采用模拟胸导联的导联方式，利用电极线测定胸部三个特定位置与右下肢之间的心电电位差，即用胸部的三个点模拟左上肢LA、右上肢RA、左下肢LL，测量其与右下肢(模拟地)之间的心电信号(即V1、V3、V5)来完成心电信号的采集；差动放大电路单元与心电导联电路单元进行信号连接，滤波电路连接于差动放大电路单元与后级放大电路单元之间，后级放大电路与中央处理器连接，其中中央处理器采用3.3V供电低功耗并自带A\D采样的MSP430F449单片机，时钟芯片选用PF8563、USB驱动芯片选用CH375B、各模拟电路中涉及到的运算放大器选用可3.3V供电的低功耗TLV2254放大器；中央处理器与时钟电路单元、液晶显示电路单元、报警电路单元相连接，完成A/D采样、数据的数字滤波处理以及转存至Flash闪存的功能，同时还包括A/D采样频率、中断口中断功能和USB芯片CH375B的间接控制；导联脱落检测电路连接于心电导联电路单元与中央处理器之间，反映导联线与人体的连接状态；中央处理器通过USB芯片电路与U盘存储电路单元连接、并通过USB接口电路将信号送至联网的家用电脑，进而通过联网的家用电脑利用联网使用的医院心电信号分析系统，即可实现心电测试装置所测数据的分析。As shown in Figure 1, the portable network-based household ECG monitoring device based on USB includes an ECG lead circuit unit, a differential amplifier circuit unit, a filter circuit unit, a post-amplifier circuit unit, a central processing unit, a clock circuit unit, a liquid crystal display Circuit unit, alarm circuit unit, lead off detection circuit and U disk storage circuit unit, wherein the lead circuit unit for detecting human ECG signals is connected to human skin through lead wires, and adopts the lead mode of simulating chest leads , use electrode wires to measure the ECG potential difference between three specific positions on the chest and the right lower limb, that is, use three points on the chest to simulate the left upper limb LA, right upper limb RA, and left lower limb LL, and measure the difference between them and the right lower limb (simulated ground) The electrocardiographic signal between (V1, V3, V5) to complete the acquisition of the electrocardiographic signal; the differential amplifier circuit unit is connected to the electrocardiographic lead circuit unit for signal connection, and the filter circuit is connected to the differential amplifier circuit unit and the post-amplifier Between the circuit units, the post-amplification circuit is connected to the central processing unit. The central processing unit uses 3.3V power supply and low power consumption and comes with A/D sampling MSP430F449 single-chip microcomputer. The clock chip is PF8563, the USB driver chip is CH375B, each analog The operational amplifier involved in the circuit is a low-power TLV2254 amplifier that can be powered by 3.3V; the central processing unit is connected with the clock circuit unit, liquid crystal display circuit unit, and alarm circuit unit to complete A/D sampling, digital filter processing of data, and The function of transferring to Flash memory also includes A/D sampling frequency, interrupt function and indirect control of USB chip CH375B; the lead-off detection circuit is connected between the ECG lead circuit unit and the central processing unit, reflecting the lead The connection state of the connection line and the human body; the central processing unit is connected with the U disk storage circuit unit through the USB chip circuit, and sends the signal to the networked home computer through the USB interface circuit, and then uses the networked home computer to use the networked hospital ECG The signal analysis system can realize the analysis of the data measured by the ECG testing device.

如图2所示，前级差动放大电路与心电导联电路单元输出信号相连接，由3个运算放大器以及外围9个电阻R1-R8和R15组成，其中运算放大器采用低功耗放大器TLV2254。此电路有两个输入引脚，分别为RA和LA，分别代表模拟胸导联方式中的右上肢和左下肢，基于心电信号属于微弱信号(幅值一股在0.5mV-5mV，频率范围一股为0.05Hz-100Hz)，设置其增益为20，对心电导联电路单元所采集信号进行第一步放大。As shown in Figure 2, the pre-stage differential amplifier circuit is connected to the output signal of the ECG lead circuit unit, and consists of 3 operational amplifiers and 9 peripheral resistors R1-R8 and R15, among which the operational amplifier is a low-power amplifier TLV2254. This circuit has two input pins, namely RA and LA, which respectively represent the right upper limb and left lower limb in the analog chest lead mode. Based on the ECG signal is a weak signal (the amplitude is generally 0.5mV-5mV, and the frequency range One is 0.05Hz-100Hz), and its gain is set to 20, and the signal collected by the ECG lead circuit unit is amplified in the first step.

如图3所示，滤波电路与差动放大电路输出的放大信号单元连接，由1个运算放大器以及外围6个电阻R9-R14和三个电容C1-C3组成，其中C1为电解电容，运算放大器采用低功耗放大器TLV2254，考虑到输入前级放大器的心电信号频率范围一股为0.05Hz-100Hz，而且主要信号的频谱主要集中在1Hz附近，为了获得理想的心电信号，滤波器的通带范围设计为0.05Hz-34Hz之间。As shown in Figure 3, the filter circuit is connected to the amplified signal unit output by the differential amplifier circuit, and consists of an operational amplifier, 6 peripheral resistors R9-R14 and three capacitors C1-C3, where C1 is an electrolytic capacitor and the operational amplifier The low-power amplifier TLV2254 is used. Considering that the frequency range of the ECG signal input to the pre-amplifier is generally 0.05Hz-100Hz, and the spectrum of the main signal is mainly concentrated around 1Hz, in order to obtain the ideal ECG signal, the filter pass The band range is designed to be between 0.05Hz-34Hz.

如图4所示，后级放大电路与滤波电路单元输出的滤波信号相连接，由1个运算放大器以及外围3个电阻R46-R48组成；原理同于一股的反向运算放大器构建原理，放大器仍然选用可3.3V供电的低功耗TLV2254运算放大器。As shown in Figure 4, the post-amplification circuit is connected to the filter signal output by the filter circuit unit, and is composed of an operational amplifier and three peripheral resistors R46-R48; the principle is the same as that of a common reverse operational amplifier. Still choose the low power consumption TLV2254 operational amplifier that can supply power with 3.3V.

如图5所示，USB驱动电路与中央处理器相连接，主要由USB驱动芯片CH375B及其外围电路组成，它是在存储在Flash中的容量达到设定数值时启动，它的工作不影响系统的数据采集和处理工作，同时心电测试装置通过USB口的连接，通过联网功能将由USB接口转存至电脑硬盘的心电数据上传至医院心电信号分析系统调用和分析。As shown in Figure 5, the USB drive circuit is connected to the central processing unit, and is mainly composed of the USB drive chip CH375B and its peripheral circuits. It starts when the capacity stored in the Flash reaches the set value, and its work does not affect the system. At the same time, the ECG test device is connected through the USB port, and the ECG data transferred from the USB interface to the computer hard disk is uploaded to the hospital's ECG signal analysis system for calling and analysis through the networking function.

如图6所示，导联脱落电路与差动放大电路单元的输出信号相连接，包括2个运算放大器，外围6个固定阻值电阻R67-R72、2个电位器P1、P2和2个电解电容C10、C11，联脱落检查电路单元输出信号与中央处理器中断口相连接，导联脱落电路通过将差动放大输出的心电信号与电阻分压的比较结果进行放大，实现后级三极管的饱和或者截止，通过三极管的输出电压不同即可判断此时装置的工作状态。若为导联线脱落，则单片机产生中断，驱动蜂鸣器警报电路发生警报。As shown in Figure 6, the lead-off circuit is connected to the output signal of the differential amplifier circuit unit, including 2 operational amplifiers, 6 peripheral fixed resistance resistors R67-R72, 2 potentiometers P1, P2 and 2 electrolytic Capacitors C10 and C11 are connected to the output signal of the disconnection inspection circuit unit and the interrupt port of the central processing unit. The lead-off circuit amplifies the electrocardiographic signal output by the differential amplification and the comparison result of the resistance voltage division to realize the output of the subsequent triode. Saturation or cut-off, the working state of the device at this time can be judged by the difference in the output voltage of the triode. If the lead wire falls off, the single-chip microcomputer generates an interruption, and the buzzer alarm circuit is driven to generate an alarm.

如图7所示，时钟电路单元由一时钟电路和一段式液晶显示电路组成，其中时钟电路包括1个时钟芯片PCF8563以及由4个电阻R91-R94、3个独石电容C33-C35和1个晶振，与中央处理器通过单片机的中断口进行连接，段式液晶包括时分秒显示，与中央处理器通的一组I\O口进行连接，时钟电路模块的开启是随着装置的启动而开始的，计时从0开始，这个设计主要是为了让患者清楚地观察佩戴时间，同时患者可自行设定佩戴时间，设定时间到装置自行停止。As shown in Figure 7, the clock circuit unit is composed of a clock circuit and a segment liquid crystal display circuit, wherein the clock circuit includes a clock chip PCF8563 and consists of 4 resistors R91-R94, 3 monolithic capacitors C33-C35 and 1 The crystal oscillator is connected with the central processing unit through the interrupt port of the single-chip microcomputer. The segment liquid crystal includes the display of hours, minutes and seconds, and is connected with a group of I\O ports connected to the central processing unit. The opening of the clock circuit module starts with the startup of the device. Yes, the timing starts from 0. This design is mainly to allow the patient to clearly observe the wearing time. At the same time, the patient can set the wearing time by himself, and the device stops automatically when the time is set.

图8为本实用新型的LCD显示电路单元图，其由1个字符式液晶和其外围电路组成，与中央处理器通的另一组I\O口进行连接，实时动态的显示心电波形，主要是为患者提供一个观察实时波形的一个需要，患者可根据自己情况选择开启或关闭。Fig. 8 is the LCD display circuit unit figure of the present utility model, and it is made up of 1 character type liquid crystal and its peripheral circuit, is connected with another group of I\O mouth that central processing unit communicates, real-time dynamic display ECG waveform, It is mainly to provide patients with a need to observe real-time waveforms, and patients can choose to turn it on or off according to their own conditions.

图9为键盘电路单元图，由1个电阻和1个开关按键组成，与中央处理器中断口连接，完成人机交互的功能，主要完成装置、液晶的开启和关闭以及液晶显示图形的放大和缩小功能。Figure 9 is a diagram of the keyboard circuit unit, which is composed of a resistor and a switch button, which are connected to the interrupt port of the central processing unit to complete the function of human-computer interaction, mainly to complete the opening and closing of the device and liquid crystal, and the enlargement and display of liquid crystal display graphics. Zoom out function.

图10为报警电路单元图，图10(a)为第一种技术方案，它是由1个蜂鸣器、1个场效应管以及外围上拉电阻R82、R83组成，图10(b)为另一种技术方案，它是由1个电阻和1个LED灯组成，其信号输入口与中央处理器中断口连接，通过蜂鸣器的鸣叫和LED灯的亮灭和闪烁，主要完成对装置不正常状态的报警功能，例如可以通过红绿色LED的点亮与熄灭来指示此时装置的工作的进行与关断，同时还可以通过USB写入指示灯的闪烁来表示Flash中的数据写入装置中U盘的过程。Figure 10 is the alarm circuit unit diagram, Figure 10(a) is the first technical solution, it is composed of a buzzer, a field effect transistor and peripheral pull-up resistors R82, R83, Figure 10(b) is Another technical solution, it is composed of 1 resistor and 1 LED light, its signal input port is connected with the interrupt port of the central processing unit, through the sound of the buzzer and the on and off and flickering of the LED light, it mainly completes the control of the device. The alarm function of abnormal state, for example, can indicate the operation and shutdown of the device at this time by turning on and off the red and green LEDs, and can also indicate the data writing in Flash by flashing the USB writing indicator The process of the U disk in the device.

Claims (10)

1. portable network type domestic electrocardio-monitor based on USB, it is characterized in that: comprise the cardiac diagnosis lead circuit unit, the differential amplifier circuit unit, the filter circuit unit, back level amplifier circuit unit, central processing unit, the clock circuit unit, the liquid crystal display circuit unit, the warning circuit unit, testing circuit and the USB flash disk memory circuit cells of coming off of leading, wherein the cardiac diagnosis lead circuit unit of human body electrocardiosignal is connected in human body skin by the line that leads, the differential amplifier circuit unit carries out signal with the cardiac diagnosis lead circuit unit and is connected, filter circuit is connected between differential amplifier circuit unit and the back level amplifier circuit unit, back level amplifying circuit is connected with central processing unit, central processing unit and clock circuit unit, the liquid crystal display circuit unit, the warning circuit unit is connected, the testing circuit that comes off of leading is connected between cardiac diagnosis lead circuit unit and the central processing unit, and central processing unit is connected with the USB flash disk memory circuit cells by the USB chip circuit, signal is delivered to the household PC of networking by usb circuit.

2. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described cardiac diagnosis lead circuit unit comprises the electrocardioelectrode that is placed in the human body skin surface and is used for the line that leads of connection electrode and device, the mode of leading adopts simulation chest lead mode, and electrode wires is measured the electrocardio potential difference between three ad-hoc locations of chest and the right lower extremity.

3. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described differential amplifier circuit unit is connected with the cardiac diagnosis lead circuit unit, form by 3 operational amplifiers and peripheral 9 resistance, it is 20 that its gain is set, and the signal collected first step of carrying out of cardiac diagnosis lead circuit unit is amplified.

4. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described filter circuit unit is a band filter, be connected with the amplifying signal unit of differential amplifier circuit output, be made up of 1 operational amplifier and peripheral 6 resistance and 3 electric capacity, passband frequency range is between 0.05Hz-34Hz.

5. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described back level amplifier circuit unit is connected with the filtering signal of filter circuit unit output, is made up of 1 operational amplifier and peripheral 3 resistance.

6. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described central processing unit, has PWM generator in AD in the sheet, on-chip timer, the interior house dog of sheet and the sheet, be connected with a back level amplifier circuit unit output signal, to coupled clock circuit unit, liquid crystal display circuit unit, warning circuit unit and the management of USB flash disk memory circuit cells with communicate by letter.

7. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: the described check circuit that comes off of leading is connected with the unitary output signal of differential amplifier circuit, comprise 2 operational amplifiers, peripheral 6 fixed resistance value resistance, 2 potentiometers and 2 electrochemical capacitors, the check circuit output signal that comes off of leading is connected with fracture in the central processing unit.

8. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described clock circuit unit is for setting the time of wearing and observing and wear the circuit unit of time, form by clock circuit and segmentation liquid crystal display circuit, wherein clock circuit comprises 1 clock chip PCF8563 and by 4 resistance, 3 leaded multilayer ceramic capacitor and 1 crystal oscillator, be connected with the middle fracture of central processing unit by single-chip microcomputer, the segmentation liquid crystal comprises that Hour Minute Second shows, with central processing unit by one group of I the O mouth be connected.

9. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described liquid crystal display circuit unit is one to can be used for the circuit unit that electrocardiosignal shows, forms by 1 character formula liquid crystal and its peripheral circuit, with central processing unit by another organize I the O mouth be connected.

10. a kind of portable network type domestic electrocardio-monitor according to claim 1 based on USB, it is characterized in that: described warning circuit unit is by 1 buzzer, 1 field effect transistor and peripheral pull-up resistor is formed or be made up of 1 resistance and 1 LED lamp, and its signal input is connected with fracture in the central processing unit.

Images