CN209499724U - A kind of portable mobile wireless ECG monitoring device - Google Patents
A kind of portable mobile wireless ECG monitoring device Download PDFInfo
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- CN209499724U CN209499724U CN201821342829.XU CN201821342829U CN209499724U CN 209499724 U CN209499724 U CN 209499724U CN 201821342829 U CN201821342829 U CN 201821342829U CN 209499724 U CN209499724 U CN 209499724U
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- generator terminal
- host side
- output end
- afe
- transport module
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Abstract
The utility model discloses a kind of portable mobile wireless ECG monitoring device, including from generator terminal and host side.From the output end of the lead of generator terminal patch electrode slice via the input terminal of pre-amplifier connection AFE(analog front end), the output end of AFE(analog front end) connects single-chip microcontroller via converter；Single-chip microcontroller is connected with from generator terminal wireless transport module.The host computer of host side is connected with host side wireless transport module；The output end of host computer connects waveform oscilloscope.It is wirelessly connected from generator terminal wireless transport module and host side wireless transport module.The utility model can improve the convenience of device, be limited by the field it not under the premise of guaranteeing monitoring reliability, while have the characteristics that low in cost, dramatically save the energy and cost of user.
Description
Technical field
The utility model relates to cardioelectric monitor technical fields, and in particular to a kind of portable mobile wireless ECG (electrocardiogram) monitoring
Device.
Background technique
In recent years, with the continuous improvement of living standard, people start gradually to pay close attention to own health.Electrocardiosignal is
The relevant critically important parameter of human health can find out all kinds of hearts of human body appearance by the analysis to electrocardiosignal
Disease.Volume is relatively large for traditional ECG monitor, there is stringent limitation to the place of monitoring, is in fields such as hospitals mostly
Institute.For some patients for needing doctor to observe heart state for a long time, often travels to and fro between hospital and family is not very convenient.
Some urgent rescues the case where, if the doctor that the electrocardiogram of patient is sent to hospital on ambulance is seen can in real time
It examines, can allow the doctor of hospital that must understand the patient's condition of patient earlier, can greatly improve hospital to the rescue efficiency of patient.It is another
Aspect, the price of ECG monitor on the market is very high now, is difficult to be accepted by the public.
Utility model content
To be solved in the utility model is the expensive and not readily portable problem of existing ECG monitor, is provided
A kind of portable mobile wireless ECG monitoring device.
To solve the above problems, the utility model is achieved through the following technical solutions:
A kind of portable mobile wireless ECG monitoring device, including from generator terminal and host side；It is above-mentioned from generator terminal include lead patch electrode
Piece, pre-amplifier, AFE(analog front end), converter, single-chip microcontroller and from generator terminal wireless transport module；The output of lead patch electrode slice
End is via the input terminal of pre-amplifier connection AFE(analog front end), and the output end of AFE(analog front end) is via converter connection single-chip microcontroller；
Single-chip microcontroller is connected with from generator terminal wireless transport module；Above-mentioned host side includes host computer, host side wireless transport module and waveform
Display；Host computer is connected with host side wireless transport module；The output end of host computer connects waveform oscilloscope；From generator terminal from
Generator terminal wireless transport module and the host side wireless transport module of host side are wirelessly connected.
In above scheme, display screen is still further comprised from generator terminal, the output end of single-chip microcontroller connects display screen.
In above scheme, AFE(analog front end) includes instrument amplifier, duopole high-pass filter and low-pass filter composition；Instrument
The input terminal of table amplifier forms the input terminal of AFE(analog front end), the output end connection duopole high-pass filter of instrument amplifier
Input terminal, the input terminal of the output end connection low-pass filter of duopole high-pass filter, the output end of low-pass filter are formed
The output end of AFE(analog front end).
In above scheme, the host side wireless transport module of slave generator terminal wireless transport module and host side from generator terminal is
2.4GHZ wireless transport module.
For the Ecg device traditional compared to hospital, the utility model realizes that portable cardiac is acquired using slave, and
Subsequent ecg analysis processing is realized using host；User can will carry from generator terminal in this way, without by cardiac diagnosis lead
The influence of line and be difficult to activity, can use the waveform oscilloscope of host side when needing to check electrocardiogram to check, can also be with
Resulting electrocardiogram will be handled using host side be sent to from the display screen of generator terminal check；Principal and subordinate, which cooperates, realizes cardioelectric monitor
Mode, can improve the convenience of device under the premise of guaranteeing monitoring reliability, be limited by the field it not, simultaneously
Have the characteristics that low in cost, dramatically saves the energy and cost of user.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of portable mobile wireless ECG monitoring device.
Fig. 2 is AFE(analog front end) functional block diagram in Fig. 1.
Fig. 3 is the circuit diagram of the duopole high-pass filter of AFE(analog front end).
Fig. 4 is the circuit diagram of the low-pass filter of AFE(analog front end).
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific example, and join
According to attached drawing, the utility model is further described.
Referring to Fig. 1, a kind of portable mobile wireless ECG monitoring device, mainly by being formed from generator terminal and host side two large divisions.On
It states and is carried at any time from generator terminal for user, the electrocardiosignal to user that main function is is acquired in real time.From generator terminal for packet
It includes lead patch electrode slice, pre-amplifier, AFE(analog front end), converter, single-chip microcontroller, display screen and is wirelessly transferred mould from generator terminal
Block.Lead pastes the output end of electrode slice via the input terminal of pre-amplifier connection AFE(analog front end), the output end warp of AFE(analog front end)
Single-chip microcontroller is connected by converter.The output end of single-chip microcontroller connects display screen.Single-chip microcontroller is connected with from generator terminal wireless transport module.
Above-mentioned host side is mounted on fixed place, and as in family, in community center or hospital, main function is by ECG's data compression
Electrocardiogram is converted into be shown.Host side includes host computer, host side wireless transport module and waveform oscilloscope.Host computer with
Host side wireless transport module is connected.The output end of host computer connects waveform oscilloscope.Mould is wirelessly transferred from the slave generator terminal of generator terminal
Block and the host side wireless transport module of host side are wirelessly connected.From the master of slave the generator terminal wireless transport module and host side of generator terminal
Generator terminal wireless transport module is 2.4GHZ wireless transport module.The same host side can be connect with 1 from generator terminal, that is, be received
1 electrocardiosignal sent from generator terminal can also be connect with 2 or more slave generator terminals, multiple be sent from generator terminal with receiving simultaneously
Electrocardiosignal.
Lead patch electrode slice mainly realizes the acquisition to electrocardiosignal, and original electrocardiosignal amplitude only has 0 to 4 millis
Volt, belongs to very faint signal.The patch electrode slice of lead used by the utility model is to utilize a silver/silver chlorate conductive sheet
As capacity coupled collection terminal.
Before the small-signal that lead patch electrode slice is coupled to is connected to a voltage follower using LMP7702 composition
The loss so that impedance matching reduction signal is carried out at end, meanwhile, it is filtered out and is mingled in electrocardiosignal using the periphery LMP7702 capacitor
The interference of DC component and the big signal of part low frequency.The rear class of pre-amplifier LMP7702 then serves as voltage amplifier, by voltage
The collected original electro-cardiologic signals of follower are output to AFE(analog front end) after simply amplifying, and are carried out by AFE(analog front end) to electrocardiosignal
Further processing.
There are Hz noise, the myoelectricity noises of skin surface, baseline drift of many interference, such as power supply in electrocardiosignal
Deng needing while effectively extracting faint electrocardio small signal to various noises therefore for ecg signal acquiring front end
Accomplish maximum inhibition.Pervious ECG signal acquisition equipment is typically all to use the discrete devices pair such as resistance, triode, capacitor
Electrocardiosignal is acquired.AFE(analog front end) is realized using such circuit, can inevitably use very more degree of integration
Not high integrated chip and many capacitance resistance wares, be easy to cause that equipment power dissipation is big, the bulky flexibility with circuit design is low
The problems such as.Since common resistance and capacitor have very big otherness, this, which will lead to the parameter of each cardiac diagnosis lead and index, has
Difference, such as impedance magnitude etc. of the inhibition ratio of input ecg signal common mode, input.If capacitor individual and resistance individual difference
It is excessive, it is also easy to cause the change of the filtering performance of signal filter circuit, causes the inconsistency of the ECG bandwidth in each channel
Influence.
The utility model use the mono- lead AFE(analog front end) of AD8232 as ECG filtering and and the chip that is further amplified,
It is a for electrocardiosignal measurement and the electrometric integrated signal conditioning chip of other biological.As shown in Fig. 2, before the simulation
Hold built-in chip type instrument amplifier, duopole high-pass filter and low-pass filter.The input terminal of instrument amplifier forms simulation
The input terminal of front end, the input terminal of the output end connection duopole high-pass filter of instrument amplifier, duopole high-pass filter
Output end connection low-pass filter input terminal, the output end of low-pass filter forms the output end of AFE(analog front end).It should
AD8232 AFE(analog front end) can extract, amplify and filter in the case where having movement or remote electrode places the noise generated faint
Bioelectrical signals, and signal can be amplified to the ADC input voltage range of single-chip microcontroller, so that analog-digital converter (ADC)
Or embedded microcontroller (MCU) can easily acquire output signal.AD8232 chip volume is small, low in energy consumption, and price also compares
It is relatively inexpensive, while being also easy to use battery power supply.It uses also fairly simple, does not need the complicated register of configuration, only need
It simply several resistance capacitances can be achieved with filtering the amplification there are also signal.After the completion of signal condition, be directly connected to from
The ADC input pin of generator terminal single-chip microcontroller carries out signal acquisition.
AD8232 AFE(analog front end) has an instrument amplifier, and fixed gain is 100.
Fig. 3 is the schematic diagram of AD8232 AFE(analog front end) internal bipolar point high-pass filter.Usually there is following calculation formula:
Usually have the R1 of the resistance value of following formula R1=R2 >=100k Ω, C1=C2, RCOMP equal to 0.14 times or
0.14 times of R2.When the value of RCOMP is 0.14 times of other two resistance values, filter has flattest band logical.RCOMP
Resistance value is smaller, and Q is bigger, and the peak value of filter is also bigger.The calculating of cutoff frequency such as formula (2.1), R1 in the design
Should all be with R2 it is equal, the capacitance of resistance value 10M, C1 and C2 should be equal, are worth for 0.33uf, R3=0.14M*R1=
1.4M.Cutoff frequency is Fc=0.48HZ, therefore the filter is the duopole high-pass filter of 0.5HZ.
Fig. 4 is the schematic diagram of low-pass filter amplifier inside AD8232 AFE(analog front end), can be used for additional gain and filter
Wave.The cutoff frequency of low pass is as follows:
Gain is 1+R9/R10.R16=R11=1M, C7=1.5nf, C4=10nf, cutoff frequency in the design
40HZ。
Independent converter can be used from the converter of generator terminal, the AD being integrated in single-chip microcontroller also can be used and turn
Parallel operation.In the present embodiment, STM32F103RET6 single-chip microcontroller is selected from generator terminal single-chip microcontroller, needs to complete from the STM32 of generator terminal
Most data acquisition and procession is sampled including AD, and iir digital filter and data are sent.In order to improve AD number
According to processing and the speed sent, the outer data for being set to memory are carried out using dma mode and are transmitted；Pass through iir digital filter later
The 50HZ power frequency notch filter of production further filters signal, sends out finally by 2.4GHZ wireless transport module NRF24L01
It is sent on host side single-chip microcontroller.
The host computer of host side passes through Wave data after receiving the signal waveform data transmitted by NRF24L01
The form of serial ports is transmitted to serial ports screen, to show the real-time ECG waveform of user on waveform oscilloscope screen.
The course of work of the utility model is as follows: lead patch electrode slice is affixed with user's skin, acquires human ecg signal.
Since electrocardiosignal collected is to mix many interference such as myoelectricity noise, Hz noise, baseline drift and motion artifacts
Small-signal, it is therefore desirable to sent again after being handled to host side, to improve precision.At this point, pre-amplifier is first to acquisition
Signal simply filtered and amplified after be sent to AFE(analog front end).The amplification and conditioning of signal are realized in AFE(analog front end),
It send after most of interference in removal signal to converter.Converter will treated after analog signal is converted to electric signal
It is sent in single-chip microcontroller.Single-chip microcontroller is by signal by being sent to host side from generator terminal wireless transport module.The host side of host side
Wireless transport module receives the signal sent from generator terminal, and is passed in host computer.Host computer is using at existing electrocardio
Reason method obtains electrocardiogram after handling signal, and electrocardiogram is sent and is shown into waveform oscilloscope.At the same time,
Host computer can also be that electrocardiogram is back to from generator terminal for acquired by host side wireless transport module, and by from generator terminal
Display screen is shown.The utility model can effectively detect electrocardiosignal, and be suitable for long term monitoring.
It should be noted that although the above embodiment described in the utility model be it is illustrative, this is not to this
The limitation of utility model, therefore the utility model is not limited in above-mentioned specific embodiment.The utility model is not being departed from
In the case where principle, the other embodiment that all those skilled in the art obtain under the enlightenment of the utility model is accordingly to be regarded as
Within the protection of the utility model.
Claims (4)
1. a kind of portable mobile wireless ECG monitoring device, characterized in that including from generator terminal and host side；
It is above-mentioned from generator terminal include lead patch electrode slice, pre-amplifier, AFE(analog front end), converter, single-chip microcontroller and from generator terminal without
Line transmission module；The output end that lead pastes electrode slice connects the input terminal of AFE(analog front end) via pre-amplifier, AFE(analog front end)
Output end connects single-chip microcontroller via converter；Single-chip microcontroller is connected with from generator terminal wireless transport module；
Above-mentioned host side includes host computer, host side wireless transport module and waveform oscilloscope；Host computer is wirelessly passed with host side
Defeated module is connected；The output end of host computer connects waveform oscilloscope；
The host side wireless transport module of slave generator terminal wireless transport module and host side from generator terminal is wirelessly connected.
2. a kind of portable mobile wireless ECG monitoring device according to claim 1, characterized in that also further wrapped from generator terminal
Display screen is included, the output end of single-chip microcontroller connects display screen.
3. a kind of portable mobile wireless ECG monitoring device according to claim 1 or 2, characterized in that AFE(analog front end) includes instrument
Table amplifier, duopole high-pass filter and low-pass filter composition；The input terminal of instrument amplifier forms the defeated of AFE(analog front end)
Enter end, the input terminal of the output end connection duopole high-pass filter of instrument amplifier, the output end of duopole high-pass filter
The input terminal of low-pass filter is connected, the output end of low-pass filter forms the output end of AFE(analog front end).
4. a kind of portable mobile wireless ECG monitoring device according to claim 1, characterized in that from the slave generator terminal of generator terminal without
The host side wireless transport module of line transmission module and host side is 2.4GHZ wireless transport module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821342829.XU CN209499724U (en) | 2018-08-20 | 2018-08-20 | A kind of portable mobile wireless ECG monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821342829.XU CN209499724U (en) | 2018-08-20 | 2018-08-20 | A kind of portable mobile wireless ECG monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209499724U true CN209499724U (en) | 2019-10-18 |
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ID=68187178
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821342829.XU Expired - Fee Related CN209499724U (en) | 2018-08-20 | 2018-08-20 | A kind of portable mobile wireless ECG monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220071543A1 (en) * | 2020-09-09 | 2022-03-10 | Mediatek Inc. | Direct sampling electrode-tissue impedance system and associated signal processing method |
-
2018
- 2018-08-20 CN CN201821342829.XU patent/CN209499724U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220071543A1 (en) * | 2020-09-09 | 2022-03-10 | Mediatek Inc. | Direct sampling electrode-tissue impedance system and associated signal processing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191018 Termination date: 20210820 |