CN203564234U - Electrocardiosignal acquisition device based on USB (Universal Series Bus) transmission - Google Patents
Electrocardiosignal acquisition device based on USB (Universal Series Bus) transmission Download PDFInfo
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- 210000003141 lower extremity Anatomy 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 4
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- 239000003990 capacitor Substances 0.000 claims description 3
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Abstract
The utility model discloses an electrocardiosignal acquisition device based on USB (Universal Series Bus) transmission. The electrocardiosignal acquisition device comprises an electrocardiosignal acquisition interface, a single-chip microcomputer and a USB interface, and is characterized in that the right arm electrode signal input pin and the left arm electrode signal input pin of the electrocardiosignal acquisition interface are connected to a primary amplifying circuit, signals are conveyed into the single-chip microcomputer after passing through a low-pass filtering circuit, a high-pass filtering circuit, a trap circuit and a post amplifying circuit in sequence; a power lead of the USB interface is further connected with a power supply isolating circuit, a power supply conversion circuit and a reference voltage generating circuit; the primary amplifying circuit is further connected with a right leg driving circuit; a shield driving pin is connected with a shield circuit. The electrocardiosignal acquisition device has the remarkable beneficial effects that hierarchical and modular design of circuits is adopted, and the USB interface is used for supplying power directly, so that the equipment connecting way is simplified, and electrocardiosignal acquisition signals can be accurately output by using the USB interface. By matching with different software modules of a computer, different electrocardiosignal monitoring functions can be realized, and convenience is brought to family guardianship and remote consultation.
Description
Technical field
This utility model relates to a kind of electrocardiogram signal acquisition device, specifically, is a kind of electrocardiogram signal acquisition device based on USB transmission.
Background technology
The cardiac monitoring equipment using now, is used as autonomous device mostly, and itself is integrated ecg signal acquiring, processing and Presentation Function, is mainly used in medical monitoring and uses.
For this type of electrocardiogram monitor, exist following main not enough:
(1) involve great expense, the hardware costs such as the demonstration in equipment, driving, processing are high;
(2) be difficult to upgrading, the software program of equipment has cured in corresponding chip according to predetermined function, so think that upgrading is impossible substantially;
(3) equipment internal processor operational capability, program curing size, the big or small restriction of ram space, make equipment be difficult to the Premium Features that a large amount of calculating of needs just can complete;
(4) due to the ability lacking with computer communication, testing result is difficult to non-volatile recording, is difficult to realize medical record management and remote expert consultation.
Utility model content
For the problems referred to above, this utility model provides a kind of electrocardiogram signal acquisition device based on USB transmission, by designing independently ECG collection device, the electrocardiosignal gathering can be uploaded to computer by USB interface, utilize the powerful calculation function of computer and central processing unit and the LCDs that high resolution display replaces existing electrocardiogram monitor, the processing of electrocardiosignal can realize by the software module in computer, thereby electrocardiogram acquisition equipment and processes and displays equipment is independent, be convenient to domestic monitoring and remote medical consultation with specialists.
For achieving the above object, adopted concrete technical scheme of the present utility model is as follows:
A kind of electrocardiogram signal acquisition device based on USB transmission, comprise electrocardiogram acquisition interface, single-chip microcomputer for AD sampling and data storage, USB interface for transfer of data, its key is: described electrocardiogram acquisition interface is provided with right lower limb and drives foot, right arm electrode signal input pin, left arm electrode signal input pin and shield guard foot, described right arm electrode signal input pin and left arm electrode signal input pin are connected on elementary amplifying circuit, the signal of this elementary amplifying circuit output passes through low-pass filter circuit successively, high-pass filtering circuit, after 50Hz trap circuit and rearmounted amplifying circuit, send in the AD sampling pin of described single-chip microcomputer, the serial communication pin of described single-chip microcomputer is connected in described USB interface through USB modular converter, on the power supply lead wire of described USB interface, be also connected with power isolation circuit, described power isolation circuit is provided with the first outfan, the second outfan and the 3rd outfan, it is described single-chip microcomputer power supply that the first outfan of power isolation circuit is converted to power supply VCC through power-switching circuit, the reference voltage that the second outfan of power isolation circuit also generates 2.5V through reference voltage generating circuit provides reference input for described rearmounted amplifying circuit, described elementary amplifying circuit is also connected with driven-right-leg circuit, the outfan of this driven-right-leg circuit is connected to described right lower limb and drives on foot, on described shield guard foot, be also connected with screened circuit.
By above description, can find out, the ECG collection device of this utility model design does not need external other power supplys, utilizes USB interface can realize transfer of data, can realize the circuit supply in collecting device again, very easy to use.When USB interface is inserted after corresponding computer, the electrocardiosignal that each electrode gathers gained is converted to digital signal accurately through multiple-stage filtering with after amplifying by single-chip microcomputer.According to different demands, in computer, can configure different electrocardio process softwares, realize corresponding cardioelectric monitor.Each power supply processing module in device can effectively utilize the power supply in USB interface, and the modules power supply in equipment, guarantees whole ECG collection device safe and reliable operation.
The electrocardiosignal each electrode being collected for the ease of subsequent conditioning circuit is processed, described elementary amplifying circuit mainly adopts operational amplifier A D620, the 2nd pin of this operational amplifier A D620 connects described right arm electrode signal input pin through current-limiting resistance R101, the 3rd pin connects described left arm electrode signal input pin through current-limiting resistance R102, the 4th pin connects the 3rd outfan of described power isolation circuit, the 6th pin connects the input that connects described low-pass filter circuit after a voltage follower, the 7th pin connects the second outfan of power isolation circuit, the 8th pin and the 1st pin connect described driven-right-leg circuit, the 6th pin is sent in the 5th pin after also connecing an inverting amplifier.
In order to obtain electrocardiosignal accurately, described driven-right-leg circuit comprises an integrated transporting discharging, this integrated transporting discharging just, negative supply input connects respectively the second outfan and the 3rd outfan of described power isolation circuit, the positive input end grounding of this integrated transporting discharging, the inverting input of this integrated transporting discharging is through resistance R 204, resistance R 203 is connected to the 1st pin of described operational amplifier A D620, the inverting input of this integrated transporting discharging is also through resistance R 205, resistance R 206 is connected to the 8th pin of described operational amplifier A D620, between the 1st pin of operational amplifier A D620 and the 8th pin, be also serially connected with resistance R 103, the outfan of integrated transporting discharging connects described right lower limb and drives foot.
In order to realize the AD sampling of single-chip microcomputer, described rearmounted amplifying circuit comprises an integrated transporting discharging, the normal phase input end of this integrated transporting discharging connects the 2.5V reference voltage of described reference voltage generating circuit output through resistance R 510, the normal phase input end of integrated transporting discharging is also through resistance R 511 ground connection, the inverting input of integrated transporting discharging connects the outfan of described 50Hz trap circuit through current-limiting resistance R509, between the outfan of this integrated transporting discharging and inverting input, going back parallel join has resistance R 512 and capacitor C 508.
In order to guarantee that modules accurately powers, described power isolation circuit adopts B0505S DC source isolation module, and described power-switching circuit adopts LM1117 low difference voltage regulator, at the outfan of power isolation circuit, is also connected with power supply indicator.
In order to realize usb signal transmission, the chip model that described USB modular converter adopts is FT232BM, is also connected with data and sends display lamp and data receiver display lamp on this chip.
For the ease of realizing, it is MSP430F149 that described single-chip microcomputer adopts chip model.
Reliable and stable in order to guarantee reference voltage, described reference voltage generating circuit comprises resistance R 601 and a Zener diode, at the negative pole end of Zener diode, generates described 2.5V reference voltage.
Remarkable result of the present utility model is: circuit classification, modularized design, it is convenient to realize, and by two-stage, amplifies and three grades of filtering, removes and disturbs, guaranteed that electrocardiosignal accurately and reliably, by USB interface, directly power, simplified apparatus connected mode, very easy to use, this device can utilize USB interface to export accurately electrocardiogram acquisition signal, by coordinating with computer different software module, can realize different electrocardio mornitoring functions, and be convenient to realize domestic monitoring and remote medical consultation with specialists.
Accompanying drawing explanation
Fig. 1 is this utility model schematic block circuit diagram;
Fig. 2 is the circuit theory diagrams of elementary amplifying circuit 3 in Fig. 1;
Fig. 3 is the circuit theory diagrams of driven-right-leg circuit 2 in Fig. 1;
Fig. 4 is the circuit theory diagrams of low-pass filter circuit 4 in Fig. 1;
Fig. 5 is the circuit theory diagrams of high-pass filtering circuit 5 in Fig. 1;
Fig. 6 is the circuit theory diagrams of trap circuit 6 in Fig. 1;
Fig. 7 is the circuit theory diagrams of rearmounted amplifying circuit 7 in Fig. 1;
Fig. 8 is the circuit theory diagrams of single-chip microcomputer 8 in Fig. 1;
Fig. 9 is the circuit theory diagrams of USB modular converter 9 in Fig. 1;
Figure 10 is the circuit theory diagrams of power isolation circuit 11 in Fig. 1;
Figure 11 is the circuit theory diagrams of power-switching circuit 12 in Fig. 1;
Figure 12 is the circuit theory diagrams of reference voltage generating circuit 13 in Fig. 1;
Figure 13 is the circuit theory diagrams of screened circuit 14 in Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model and operation principle are described in further detail.
As shown in Figure 1, a kind of electrocardiogram signal acquisition device based on USB transmission, comprise electrocardiogram acquisition interface 1, single-chip microcomputer 8 for AD sampling and data storage, usb 10 for transfer of data, described electrocardiogram acquisition interface 1 is provided with right lower limb and drives foot RL, right arm electrode signal input pin RA, left arm electrode signal input pin LA and shield guard foot PINGBI, described right arm electrode signal input pin RA and left arm electrode signal input pin LA are connected on elementary amplifying circuit 3, the signal of these elementary amplifying circuit 3 outputs passes through low-pass filter circuit 4 successively, high-pass filtering circuit 5, after 50Hz trap circuit 6 and rearmounted amplifying circuit 7, send in the AD sampling pin of described single-chip microcomputer 8, the serial communication pin TXD of described single-chip microcomputer 8, RXD is connected on described usb 10 through USB modular converter 9, on the power supply lead wire of described usb 10, be also connected with power isolation circuit 11, described power isolation circuit 11 is provided with the first outfan D+5V, the second outfan E+5V and the 3rd outfan E-5V, it is described single-chip microcomputer 8 power supplies that the first outfan D+5V of power isolation circuit 11 is converted to power supply VCC through power-switching circuit 12, the reference voltage that the second outfan E+5V of power isolation circuit 11 also generates 2.5V through reference voltage generating circuit 13 provides reference input for described rearmounted amplifying circuit 7, described elementary amplifying circuit 3 is also connected with driven-right-leg circuit 2, the outfan of this driven-right-leg circuit 2 is connected to described right lower limb and drives on foot RL, on described shield guard foot PINGBI, be also connected with screened circuit 14.
As shown in Figure 2, in specific implementation process, the main operational amplifier A D620 that adopts of described elementary amplifying circuit 3, the 2nd pin of this operational amplifier A D620 connects described right arm electrode signal input pin RA through current-limiting resistance R101, the 3rd pin connects described left arm electrode signal input pin LA through current-limiting resistance R102, the 4th pin meets the 3rd outfan E-5V of described power isolation circuit 11, the 6th pin connects the input that connects described low-pass filter circuit 4 after a voltage follower U03B, the 7th pin meets the second outfan E+5V of power isolation circuit 11, the 8th pin and the 1st pin connect described driven-right-leg circuit 2, the 6th pin is sent in the 5th pin after also meeting an inverting amplifier U03A.
As seen in Figure 2, voltage follower U03B and inverting amplifier U03A all adopt integrated transporting discharging OP293 to realize, signal by 3 couples of right arm electrode signal input pin RA of elementary amplifying circuit and left arm electrode signal input pin LA carries out processing and amplifying, is convenient to late-class circuit filtering clutter.
By Fig. 2 and Fig. 3, can find out, in order to guarantee that right lower limb drives the driving force of signal, described driven-right-leg circuit 2 comprises an integrated transporting discharging U02A, this integrated transporting discharging U02A just, negative supply input connects respectively the second outfan E+5V and the 3rd outfan E-5V of described power isolation circuit 11, the positive input end grounding of this integrated transporting discharging U02A, the inverting input of this integrated transporting discharging U02A is through resistance R 204, resistance R 203 is connected to the 1st pin of described operational amplifier A D620, the inverting input of this integrated transporting discharging U02A is also through resistance R 205, resistance R 206 is connected to the 8th pin of described operational amplifier A D620, between the 1st pin of operational amplifier A D620 and the 8th pin, be also serially connected with resistance R 103, the outfan of integrated transporting discharging U02A connects described right lower limb and drives foot RL.
As Figure 4-Figure 6, for the interference in filtering electrocardiosignal, utilize integrated transporting discharging OP293 to build respectively the low pass filter shown in Fig. 4,50Hz wave trap shown in high pass filter shown in Fig. 5 and Fig. 6, be connected in turn between elementary amplifying circuit 3 and rearmounted amplifying circuit 7, guaranteed the front electrocardiosignal of rearmounted amplifying circuit 7 accurately and reliably.
As shown in Figure 7, in order to guarantee the accurate of single-chip microcomputer 8AD sampling, described rearmounted amplifying circuit 7 comprises an integrated transporting discharging U05B, the normal phase input end of this integrated transporting discharging U05B connects the 2.5V reference voltage of described reference voltage generating circuit 13 outputs through resistance R 510, the normal phase input end of integrated transporting discharging U05B is also through resistance R 511 ground connection, the inverting input of integrated transporting discharging U05B connects the outfan of described 50Hz trap circuit 6 through current-limiting resistance R509, between the outfan of this integrated transporting discharging U05B and inverting input, going back parallel join has resistance R 512 and capacitor C 508.
As shown in Figure 8, it is MSP430F149 that single-chip microcomputer 8 adopts chip model, and No. 32 pins of this chip and No. 33 pins are as TXD and RXD pin, and No. 59 pins of this chip receive the output signal of described rearmounted amplifying circuit 7 as AD sampling foot.
As shown in Figure 9, in order to realize the USB transmission of data in single-chip microcomputer 8, the chip model that described USB modular converter 9 adopts is FT232BM, is also connected with data and sends display lamp and data receiver display lamp on this chip, and the display lamp here utilizes light emitting diode D3 and the D2 in Fig. 9 to realize.
As shown in Figure 10 and Figure 11, described power isolation circuit 11 adopts B0505S DC source isolation module, described power-switching circuit 12 adopts LM1117 low difference voltage regulator, outfan at power isolation circuit 11 is also connected with power supply indicator, this power supply indicator utilizes light emitting diode D1 in Figure 10 to realize, and B0505S is mainly used in realizing isolated from power, avoids power supply to disturb, LM1117 is mainly used in realizing power supply conversion, and it is various chip power supplies in circuit that power supply VCC is provided.
As shown in figure 12, described reference voltage generating circuit 13 comprises resistance R 601 and a Zener diode, at the negative pole end of Zener diode, generates described 2.5V reference voltage, and the Zener diode here adopts LM385, is mainly used in providing 2.5V reference voltage.
As shown in figure 13, shown in screened circuit 14 adopt integrated transporting discharging OP293 to realize, be mainly used in adding suitable driving current potential on the screen layer of sampling electrode cable line, effectively the coupled interference of shielded cable.
By above description, can find, the present embodiment circuit grading design, modules is realized convenient, and the electrocardiosignal of output is accurately and reliably.
Finally it should be noted that: the present embodiment is only optimal design of the present utility model, assembling and using method, not this utility model is done to any pro forma restriction; All foundations circuit of the present utility model, structure are made any type of simple modification, within all belonging to technical scope of the present utility model.
Claims (8)
1. the electrocardiogram signal acquisition device based on USB transmission, comprise electrocardiogram acquisition interface (1), single-chip microcomputer (8) for AD sampling and data storage, USB interface (10) for transfer of data, it is characterized in that: described electrocardiogram acquisition interface (1) is provided with right lower limb and drives foot (RL), right arm electrode signal input pin (RA), left arm electrode signal input pin (LA) and shield guard foot (PINGBI), described right arm electrode signal input pin (RA) and left arm electrode signal input pin (LA) are connected on elementary amplifying circuit (3), the signal of this elementary amplifying circuit (3) output passes through low-pass filter circuit (4) successively, high-pass filtering circuit (5), after 50Hz trap circuit (6) and rearmounted amplifying circuit (7), send in the AD sampling pin of described single-chip microcomputer (8), serial communication pin (the TXD of described single-chip microcomputer (8), RXD) through USB modular converter (9), be connected in described USB interface (10), on the power supply lead wire of described USB interface (10), be also connected with power isolation circuit (11), described power isolation circuit (11) is provided with the first outfan (D+5V), the second outfan (E+5V) and the 3rd outfan (E-5V), it is described single-chip microcomputer (8) power supply that first outfan (D+5V) of power isolation circuit (11) is converted to power supply VCC through power-switching circuit (12), the reference voltage that second outfan (E+5V) of power isolation circuit (11) also passes through reference voltage generating circuit (13) generation 2.5V is that described rearmounted amplifying circuit (7) provides reference input, described elementary amplifying circuit (3) is also connected with driven-right-leg circuit (2), the outfan of this driven-right-leg circuit (2) is connected to described right lower limb and drives on foot (RL), on described shield guard foot (PINGBI), be also connected with screened circuit (14).
2. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, it is characterized in that: described elementary amplifying circuit (3) mainly adopts operational amplifier A D620, the 2nd pin of this operational amplifier A D620 connects described right arm electrode signal input pin (RA) through current-limiting resistance R101, the 3rd pin connects described left arm electrode signal input pin (LA) through current-limiting resistance R102, the 4th pin connects the 3rd outfan (E-5V) of described power isolation circuit (11), the 6th pin connects the input that connects described low-pass filter circuit (4) after a voltage follower, the 7th pin connects second outfan (E+5V) of power isolation circuit (11), the 8th pin and the 1st pin connect described driven-right-leg circuit (2), the 6th pin is sent in the 5th pin after also connecing an inverting amplifier.
3. the electrocardiogram signal acquisition device based on USB transmission according to claim 2, it is characterized in that: described driven-right-leg circuit (2) comprises an integrated transporting discharging, this integrated transporting discharging just, negative supply input connects respectively the second outfan (E+5V) and the 3rd outfan (E-5V) of described power isolation circuit (11), the positive input end grounding of this integrated transporting discharging, the inverting input of this integrated transporting discharging is through resistance R 204, resistance R 203 is connected to the 1st pin of described operational amplifier A D620, the inverting input of this integrated transporting discharging is also through resistance R 205, resistance R 206 is connected to the 8th pin of described operational amplifier A D620, between the 1st pin of operational amplifier A D620 and the 8th pin, be also serially connected with resistance R 103, the outfan of integrated transporting discharging connects described right lower limb and drives foot (RL).
4. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, it is characterized in that: described rearmounted amplifying circuit (7) comprises an integrated transporting discharging, the normal phase input end of this integrated transporting discharging connects the 2.5V reference voltage of described reference voltage generating circuit (13) output through resistance R 510, the normal phase input end of integrated transporting discharging is also through resistance R 511 ground connection, the inverting input of integrated transporting discharging connects the outfan of described 50Hz trap circuit (6) through current-limiting resistance R509, between the outfan of this integrated transporting discharging and inverting input, go back parallel join and have resistance R 512 and capacitor C 508.
5. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, it is characterized in that: described power isolation circuit (11) adopts B0505S DC source isolation module, described power-switching circuit (12) adopts LM1117 low difference voltage regulator, at the outfan of power isolation circuit (11), is also connected with power supply indicator.
6. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, is characterized in that: the chip model that described USB modular converter (9) adopts is FT232BM, is also connected with data and sends display lamp and data receiver display lamp on this chip.
7. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, is characterized in that: it is MSP430F149 that described single-chip microcomputer (8) adopts chip model.
8. the electrocardiogram signal acquisition device based on USB transmission according to claim 1, is characterized in that: described reference voltage generating circuit (13) comprises resistance R 601 and a Zener diode, at the negative pole end of Zener diode, generates described 2.5V reference voltage.
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| CN201320771630.XU CN203564234U (en) | 2013-11-29 | 2013-11-29 | Electrocardiosignal acquisition device based on USB (Universal Series Bus) transmission |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000575A (en) * | 2014-05-04 | 2014-08-27 | 山东中医药大学 | Electrocardiosignal acquisition device |
| CN104305990A (en) * | 2014-11-06 | 2015-01-28 | 中国人民解放军第三0五医院 | Micro recording instrument for occasional arrhythmia and data processing method thereof |
| CN104398255A (en) * | 2014-11-20 | 2015-03-11 | 广西大学 | Portable electrocardio measurement device |
| CN105286813A (en) * | 2015-09-17 | 2016-02-03 | 维沃移动通信有限公司 | Mobile terminal and pulse measurement method |
| CN108665977A (en) * | 2018-04-24 | 2018-10-16 | 上海市浦东新区周浦医院 | For state of an illness early warning and the human computer cooperation system and method for intervening management |
| CN110840434A (en) * | 2018-08-21 | 2020-02-28 | 中南大学 | Low-power consumption bluetooth electrocardio monitoring system based on discrete component and microprocessor |
| CN113143215A (en) * | 2021-04-27 | 2021-07-23 | 漳州卫生职业学院 | Human health monitoring system |
| CN116869540A (en) * | 2022-04-29 | 2023-10-13 | 武汉联影智融医疗科技有限公司 | Electrocardiosignal acquisition equipment and system |
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2013
- 2013-11-29 CN CN201320771630.XU patent/CN203564234U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000575A (en) * | 2014-05-04 | 2014-08-27 | 山东中医药大学 | Electrocardiosignal acquisition device |
| CN104305990A (en) * | 2014-11-06 | 2015-01-28 | 中国人民解放军第三0五医院 | Micro recording instrument for occasional arrhythmia and data processing method thereof |
| CN104398255A (en) * | 2014-11-20 | 2015-03-11 | 广西大学 | Portable electrocardio measurement device |
| CN105286813A (en) * | 2015-09-17 | 2016-02-03 | 维沃移动通信有限公司 | Mobile terminal and pulse measurement method |
| CN108665977A (en) * | 2018-04-24 | 2018-10-16 | 上海市浦东新区周浦医院 | For state of an illness early warning and the human computer cooperation system and method for intervening management |
| CN110840434A (en) * | 2018-08-21 | 2020-02-28 | 中南大学 | Low-power consumption bluetooth electrocardio monitoring system based on discrete component and microprocessor |
| CN110840434B (en) * | 2018-08-21 | 2022-06-21 | 中南大学 | Low-power-consumption Bluetooth electrocardiogram monitoring system based on discrete component and microprocessor |
| CN113143215A (en) * | 2021-04-27 | 2021-07-23 | 漳州卫生职业学院 | Human health monitoring system |
| CN116869540A (en) * | 2022-04-29 | 2023-10-13 | 武汉联影智融医疗科技有限公司 | Electrocardiosignal acquisition equipment and system |
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