CN203914906U - A kind of electrocardio testing circuit and electronic equipment - Google Patents
A kind of electrocardio testing circuit and electronic equipment Download PDFInfo
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- CN203914906U CN203914906U CN201420261476.6U CN201420261476U CN203914906U CN 203914906 U CN203914906 U CN 203914906U CN 201420261476 U CN201420261476 U CN 201420261476U CN 203914906 U CN203914906 U CN 203914906U
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The utility model discloses a kind of electrocardio testing circuit and electronic equipment, described electrocardio testing circuit comprises bluetooth master chip, electrocardio detection module, output module and is used to described bluetooth master chip and the power module of electrocardio detection module power supply, described electrocardio detection module is sent to bluetooth master chip by the electrocardiosignal of detection and processes, and described output module is connected with described bluetooth master chip.Electrocardio testing circuit of the present utility model, adopts a low-power consumption bluetooth master chip as main process chip, and testing circuit overall power is low, and stand-by time is long, and applicable user carries, easy to use.In addition, adopt high-precision heart rate detection chip, by detecting high-precision pulse signal, the heart rate value degree of accuracy of acquisition is high.
Description
Technical field
This utility model belongs to ECG detection device technical field, specifically, relates to a kind of for guarding user heart
electrocardio testing circuitand be provided with the electronic equipment of this circuit.
Background technology
The principle of electrocardio testing circuit is by being attached to two electrodes on human body surface diverse location, electrocardiosignal is transferred to treatment circuit to be processed and is shown by display unit, more portable for what heartbeat detection device was done, what generally adopt at present is by two potentiometric sensors and measurement circuit design being set in one, the component energy consumption adopting is high, need often to change battery, to use, bring not aspect.In addition, in order to meet portable needs, circuit structure is simplified, therefore, treatment circuit adopts some simple electronic devices and components to build, and measured heart rate precision is lower, little to user's actual reference significance.
In addition, current electrocardio testing circuit does not have warning function, during to suitable wearing not, can not alarm, and to use, bring inconvenience.
Summary of the invention
This utility model, in order to solve the high problem of existing electrocardio testing circuit energy consumption, provides a kind of electrocardio testing circuit and electronic equipment, and this electrocardio testing circuit, by adopting a low-power consumption bluetooth master chip, can effectively reduce circuit power consumption.
In order to solve the problems of the technologies described above, this utility model is achieved by the following technical solutions:
A kind of electrocardio testing circuit, it is characterized in that: comprise bluetooth master chip, electrocardio detection module, output module and be used to described bluetooth master chip and the power module of electrocardio detection module power supply, described electrocardio detection module is sent to bluetooth master chip by the electrocardiosignal of detection, after described electrocardiosignal being processed by bluetooth master chip, by antenna, be sent to reception signal terminal, described output module is connected with described bluetooth master chip.
Further, also comprise the display screen being connected with described bluetooth master chip.
Further, also comprise the photoelectricity volume pulse wave sensor module being connected with described bluetooth master chip.
Also comprise the acceleration transducer being connected with described bluetooth master chip.
Further, described output module comprises LED lamp and/or motor.
Further, described power module comprises battery and low pressure difference linear voltage regulator, and described battery is exported constant unidirectional current by low pressure difference linear voltage regulator.
Further again, described electrocardio detection module comprises a heart rate detection chip, described heart rate detection chip comprises first signal input, two signal input parts of secondary signal input and a driving amplifier outfan, first signal input, secondary signal input connects respectively after a resistance and the first electrode (ECG1), third electrode (ECG3) connects one to one, driving amplifier outfan (RLD) is connected with the second electrode (ECG2) after connecting a resistance, described first signal input, secondary signal input is connected with DC source (VDD) after connecting respectively a pull-up resistor.
Or, described electrocardio detection module comprises a heart rate detection chip, described heart rate detection chip comprises first signal input and two signal input parts of secondary signal input, after this first signal input is connected respectively a resistance with secondary signal input, connects one to one with the first electrode (ECG1), third electrode (ECG3).
The electrocardio testing circuit with two signal input parts and a driving amplifier outfan based on above-mentioned, the present invention provides a kind of electronic equipment simultaneously, comprise belt body, described electrocardio testing circuit is fixed on described belt body, the first electrode (ECG1), the second electrode (ECG2) are fixed on the inner surface of belt body, and third electrode (ECG3) is fixed on band body side surface.
The electrocardio testing circuit with two signal input parts based on above-mentioned, the present invention provides a kind of electronic equipment simultaneously, comprise belt body, described electrocardio testing circuit is fixed on described belt body, the first electrode (ECG1) is fixed on the inner surface of belt body, and third electrode (ECG3) is fixed on band body side surface.
Compared with prior art, advantage of the present utility model and good effect are: electrocardio testing circuit of the present utility model, by adopting a low-power consumption bluetooth master chip as main process chip, the pulse signal that heart rate detection chip is recorded carries out computing and processing, obtain wearer's heart rate, testing circuit overall power is low, and stand-by time is long, applicable user carries, easy to use.In addition, adopt high-precision heart rate detection chip, by detecting high-precision pulse signal, the heart rate value degree of accuracy obtaining is high.
Read by reference to the accompanying drawings after the detailed description of this utility model embodiment, other features of the present utility model and advantage will become clearer.
Accompanying drawing explanation
Fig. 1 is the functional-block diagram of the electrocardio testing circuit that proposes of this utility model;
Fig. 2 is the partial circuit schematic diagram of a kind of embodiment in Fig. 1;
Fig. 3 is the partial circuit schematic diagram of another embodiment in Fig. 2;
Fig. 4 is a kind of example structure figure of the electronic equipment that proposes of this utility model;
Fig. 5 is the lateral plan of Fig. 4;
Fig. 6 is another example structure schematic diagram of the electronic equipment that proposes of this utility model;
Fig. 7 is the schematic diagram of electronic equipment in Fig. 6;
Fig. 8 is PPG sensor module schematic diagram in Fig. 6.
The specific embodiment
This utility model is in order to solve the high problem of existing electrocardio testing circuit energy consumption, a kind of electrocardio testing circuit and electronic equipment are provided, by employing, adopt a low-power consumption bluetooth master chip as main process chip, can effectively reduce circuit power consumption, the function of Bluetooth communication that utilizes bluetooth master chip to carry, by bluetooth low-power consumption 4.0 agreements and reception signal terminal (such as mobile phone), communicate or intuitively show by self display screen, without increasing other hardware circuit, can save circuit cost.
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in more detail.
Embodiment mono-, the present embodiment provides a kind of electrocardio testing circuit, shown in Figure 1, comprise bluetooth master chip, electrocardio detection module, output module and be used to described bluetooth master chip and the power module of electrocardio detection module power supply, described heart rate detection module is sent to bluetooth master chip by the heart rate signal of detection, mode after carrying out analog digital conversion by bluetooth master chip and by Bluetooth communication is sent to reception signal terminal, output module is connected with described bluetooth master chip, receives the control output index signal of bluetooth master chip.
The operation principle of conscience power detection circuit is: the electrocardiosignal that the bluetooth master chip of low-power consumption detects electrocardio detection module is carried out computing and processing (analog digital conversion for example, after the operations such as amplification, can form ecg wave form signal), or further by built-in comparator, enumerators etc. directly obtain wearer's heart rate value now, then by bluetooth low-power consumption 4.0 protocol synchronization, in reception signal terminal (such as mobile phone), show, its displaying contents can be for representing the electrocardiogram of the ecg wave form signal that bluetooth master chip is exported and/or a series of heart rate values that directly drawn by bluetooth master chip.
Motion paces number of times information in order conveniently to detect user movement time, also comprise the acceleration transducer being connected with described bluetooth master chip, the vibration signal that bluetooth master chip degree of will speed up sensor detects is by computing and the processing of the hardware such as built-in operational amplifier, enumerator, calculate wearer's paces information, therefore, the paces information directly related with heart rate in the time of can providing user movement, can provide more fully human body physiological parameter information to wearer, while being applicable to motion, use.Certainly, conscience power detection circuit can also be set up other sensors according to actual needs, such as with various sensors such as GPS, gyroscopes, can measure wearer's the data such as quantity of motion, consumption of calorie, and transfer data to reception signal terminal or high in the clouds etc.As known from the above, conscience power detection circuit has advantages of low-power consumption, volume is little, portable, accuracy of detection is high, can be applied in various heart rate detection equipments, is especially applicable to being applied in wearable product.
For the ease of carrying out wearer to point out having while coming from the incoming call of reception signal terminal or note, output module in conscience power detection circuit can be configured as LED lamp, user is carried out to flash for prompting, can also be configured as motor, user is carried out to vibration prompting, certainly, also can be configured to both combinations, can vibrate and flash for prompting simultaneously, or be respectively used to point out dissimilar information.
For convenient, the ecg information recording is carried out to this locality demonstration intuitively, also comprise the display screen being connected with described bluetooth master chip.The vibration information that bluetooth master chip can degree of will speed up meter detects, electrocardio detection module to the information such as electrocardiosignal carry out computing and processing, be presented on display screen.Described display screen preferably adopts OLED(organic electric exciting light-emitting diode) display screen.
Also comprise photoelectricity volume pulsation wave (PPG) sensor module being connected with described bluetooth master chip, the infrared ray of this module, user also can carry out the measurement of heart rate, compare the metering system of ECG, photoelectricity volume pulse wave sensor module has larger signal amplitude, and photoelectricity volume pulse wave sensor module metering system is not subject to the impact of power frequency interference and electromyographic signal.Photoelectricity volume pulse wave sensor module also has gestures detection function, can detect user's gesture and realize the control to display screen.
Described power module comprises battery and low pressure difference linear voltage regulator, described battery is exported constant unidirectional current by low pressure difference linear voltage regulator, for the ease of environmental protection, this testing circuit preferably adopts rechargeable battery, described power module also comprises charging management chip, described charging management chip connects after external power source for battery charges by USB charging port, charging management chip can connect to be wired on the smart machine with USB interface by USB and charges, and also can be connected to alternating current power supply by a power supply adaptor and charge.
Embodiment bis-, as a preferred embodiment, described heart rate detection module comprises a heart rate detection chip, shown in Figure 2, provided a kind of partial circuit schematic diagram of electrocardio testing circuit, heart rate detection chip U4 in the present embodiment adopts an AD8232 chip to realize, heart rate detection chip U4 comprises first signal input-IN, two signal input parts of secondary signal input+IN, with a driving amplifier outfan RLD, first signal input-IN, secondary signal input+IN is contact resistance R22 respectively, after resistance R 21 with the first electrode ECG1, third electrode ECG3 connects one to one, after driving amplifier outfan RLD contact resistance R34, be connected with the second electrode ECG2, for the ease of connecting, the first electrode ECG1, third electrode ECG3, the second electrode ECG2 is respectively by socket J3, socket J5, socket J4 detection circuit for access, first signal input-IN, secondary signal input+IN is connected with DC source VDD after connecting respectively a pull-up resistor.The operation principle of conscience power detection circuit is: detect when any input voltage and the positive supply rail of first signal input-IN, secondary signal input+IN and differ less than 0.5 V, in this case, first signal input-IN, secondary signal input+IN must be connected to positive supply by a pull-up resistor.Normal work period, user's current potential must the common mode range in bluetooth master chip in, this only when the second electrode ECG2 is connected to driving amplifier outfan RLD just likely, in the mode of operation of this circuit, also be that direct current leads and comes off in pattern, heart rate detection chip U4 independent check first signal input-IN, each input of secondary signal input+IN, therefore can detect which electrode disconnects, heart rate detection chip U4 is by being made as by corresponding LOD-or LOD+ pin the concrete electrode that high level is indicated disconnection, corresponding bluetooth master chip can be pointed out by control output end output alarm, to point out in time user correctly to wear, guarantee to detect valid data.The AD8232 ECG electrode measurement mode of the present embodiment only has the current drain of 170uA, and this has very large help for general battery capacity on wearable device is less.
Embodiment tri-, the present embodiment provides the partial circuit schematic diagram of another electrocardio testing circuit, Circuits System block diagram can be shown in Figure 1, therefore not to repeat here, described heart rate detection module comprises a heart rate detection chip equally, the partial circuit schematic diagram of the present embodiment is participated in shown in Fig. 3, heart rate detection chip U4 comprises first signal input-IN, two signal input parts of secondary signal input+IN, this first signal input-IN, secondary signal input+IN is contact resistance R22 respectively, after resistance R 21 with the first electrode ECG1, third electrode ECG3 connects one to one, the mode of operation of this circuit is for exchanging the detecting pattern that comes off that leads, only draw two detecting electrodes, with comparing of three detecting electrodes, can only define electrode and lose connection, but cannot determine concrete electrode.While only using two electrodes, exchanging the leads detecting pattern very useful (without using drive electrode) that comes off.In this case, between two electrodes, must have conducting path, this path is comprised of two resistance conventionally.These two resistance are also for each input provides biasing feedback path.Each resistance should be connected to REFOUT or RLD, so that input remains in the common mode range of instrument amplifier.Chip provides the little electric current of 100 kHz to come detecting electrode when to disconnect by being forced to input.This electric current is flowed into IN and produces a differential voltage at input from IN+ by non-essential resistance, and then this voltage compares through synchronous detecting and with internal threshold.The recommended value of these two non-essential resistances is 10 M.Compared with low resistance value, can make difference pressure drop too low and cannot detect, input impedance that simultaneously can step-down amplifier.When electrode is connected to object, the impedance on this path should be lower than 3 M, to keep pressure drop all the time lower than comparator threshold.
Embodiment tetra-, the center power detection circuit with two signal input parts and a driving amplifier outfan based in embodiment bis-, the present embodiment provides a kind of electronic equipment, referring to Fig. 4, shown in Fig. 5, this electronic equipment is that a kind of wrist is worn equipment, comprise belt body 1, electrocardio testing circuit is fixed on described belt body 1, the first electrode ECG1, the second electrode ECG2 is fixed on the inner surface of belt body 1, third electrode ECG3 is fixed on belt body 1 side, when the electronic equipment of the present embodiment is worn in wrist, the first electrode ECG1, the second electrode ECG2 contacts with wrist skin surface, wearer need to be with the finger presses third electrode ECG3 of an other hands, when correct contact, LED lamp 2 can glimmer once when a heart beating being detected, if abnormal contact, electrocardio testing circuit can be controlled output alarm prompting.
As shown in Figure 6, in another embodiment of the present utility model, on belt body 1, be also provided with organic electric exciting light-emitting diode (OLED) display screen 5, for showing detected ecg wave form figure or heart rate value, facilitate user intuitively to observe.
The electrocardio testing circuit of the present embodiment also comprises the photoelectricity volume pulse wave sensor module being connected with bluetooth master chip, comprise photoelectricity volume pulsation wave (PPG) sensor 3 and infrared LED 4, organic electric exciting light-emitting diode (OLED) display screen 5 is arranged on belt body 1, PPG sensor 3 and infrared LED 4 are arranged on a side of OLED display screen 5, and PPG sensor 3 is connected with described bluetooth master chip.
Shown in Figure 7, when this electronic equipment uses, finger 6 is placed in to the place ahead of infrared LED 4, infrared LED 4 sends Infrared, through watch face, PPG sensor 3 is returned in skin reflex, and according to the Infrared intensity reflecting, judges position and the type of action of gesture.Owing to adopting Infrared, belong to 840nm black light, avoided the stimulation to eyes of user.In addition infrared ray has following requirement to PPG sensor windows region light transmittance:
550nm: 5% ；
850nm: 70 to 80% ；
In the present embodiment, can utilize the infrared ray of PPG sensor and infrared LED to carry out the measurement of gesture identification control and heart rate, gesture identification is controlled the interactive operation that function can be supported user and OLED screen, has better user and experiences.
And when utilizing the infrared ray of PPG sensor and infrared LED to carry out heart rate detection, the infrared ray radiation of infrared LED is to finger tip skin surface, light beam will be delivered to PPG sensor by reflection mode.While beating due to the arteries in irradiate light region, arterial blood will change to the absorbtivity of light thereupon, and its hetero-organizations such as skin, muscle, skeleton and venous blood are invariable to the absorbtivity of light, so when heart contraction, peripheral blood vessel blood volume is maximum, absorbing amount is also maximum, and the light intensity detecting is minimum; And when diastole, peripheral blood vessel blood volume is minimum, and the light intensity detecting is maximum, and the light intensity that PPG sensor can detect is pulsating nature thereupon and changes, and this intensity variation signal can be converted to the signal of telecommunication, and then can obtain the heart rate information of human body.
Shown in Figure 8, PPG sensor in the present embodiment is a sensor chip U1, can convert the optical signal detecting to the signal of telecommunication, this signal of telecommunication exports a signal input part of bluetooth master chip to by signal output part GESTURE_INT after by processing such as the built-in operational amplification circuit of U1, low-pass filter circuit, high-pass filtering circuit, trap circuits, and the built-in peak detection circuit of bluetooth master chip can be to the signal extraction peak value of PPG sensor output to obtain heart rate value.While measuring heart rate, bluetooth master chip can be controlled PPG sensor to the driving power of infrared LED, pulse width and umber of pulse, thus by the power-dissipation-reduced of PPG sensor to 0.45mW, reduce greatly thus the consumption to battery electric quantity.
Compare the metering system of ECG, PPG has larger signal amplitude, and PPG metering system is not subject to the impact of power frequency interference and electromyographic signal.User only need to invest finger plaster in PPG sensor windows, and system will start to test heart rate.
The ECG heart rate measurement mode of the electronic equipment in above-described embodiment and PPG heart rate measurement mode can be carried out simultaneously.But can detect selection and the switching of selecting circuit (not shown) to realize the electrocardio testing circuit of ECG mode and the electrocardio testing circuit of PPG mode by setting up electrocardio in other embodiments of the invention, to reduce power consumption, improve user and experience, this electrocardio detects and selects circuit can be the on-off circuit being comprised of devices such as metal-oxide-semiconductor and resistance that bluetooth master chip is controlled.
In addition, when electronic equipment based in embodiment tri-there is the center power detection circuit of two signal input parts time, from surface texture, with the structural similarity in Fig. 4, Fig. 5, different from it is, this electronic equipment no longer has the second electrode ECG2, and the first electrode ECG1, the setting position of third electrode ECG3 on belt body 1 are identical with foregoing setting position, and therefore not to repeat here.
Certainly; above-mentioned explanation is not to restriction of the present utility model; this utility model is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (10)
1. an electrocardio testing circuit, it is characterized in that: comprise bluetooth master chip, electrocardio detection module, output module and be used to described bluetooth master chip and the power module of electrocardio detection module power supply, described electrocardio detection module is sent to bluetooth master chip by the electrocardiosignal of detection, after described electrocardiosignal being processed by bluetooth master chip, by antenna, be sent to reception signal terminal, described output module is connected with described bluetooth master chip.
2. electrocardio testing circuit according to claim 1, is characterized in that: also comprise the display screen being connected with described bluetooth master chip.
3. electrocardio testing circuit according to claim 2, is characterized in that: also comprise the photoelectricity volume pulse wave sensor module being connected with described bluetooth master chip.
4. electrocardio testing circuit according to claim 1, is characterized in that: also comprise the acceleration transducer being connected with described bluetooth master chip.
5. electrocardio testing circuit according to claim 1, is characterized in that: described output module comprises LED lamp and/or motor.
6. electrocardio testing circuit according to claim 1, is characterized in that: described power module comprises battery and low pressure difference linear voltage regulator, and described battery is exported constant unidirectional current by low pressure difference linear voltage regulator.
7. according to the electrocardio testing circuit described in claim 1-6 any one claim, it is characterized in that: described electrocardio detection module comprises a heart rate detection chip, described heart rate detection chip comprises first signal input, two signal input parts of secondary signal input and a driving amplifier outfan, first signal input, secondary signal input connects respectively after a resistance and the first electrode (ECG1), third electrode (ECG3) connects one to one, driving amplifier outfan (RLD) is connected with the second electrode (ECG2) after connecting a resistance, described first signal input, secondary signal input is connected with DC source (VDD) after connecting respectively a pull-up resistor.
8. according to the electrocardio testing circuit described in claim 1-6 any one claim, it is characterized in that: described electrocardio detection module comprises a heart rate detection chip, described heart rate detection chip comprises first signal input and two signal input parts of secondary signal input, after this first signal input is connected respectively a resistance with secondary signal input, connects one to one with the first electrode (ECG1), third electrode (ECG3).
9. an electronic equipment, it is characterized in that: comprise the electrocardio testing circuit described in claim 7, also comprise belt body, described electrocardio testing circuit is fixed on described belt body, the first electrode (ECG1), the second electrode (ECG2) are fixed on the inner surface of belt body, and third electrode (ECG3) is fixed on band body side surface.
10. an electronic equipment, it is characterized in that: comprise the electrocardio testing circuit described in claim 8, also comprise belt body, described electrocardio testing circuit is fixed on described belt body, the first electrode (ECG1) is fixed on the inner surface of belt body, and third electrode (ECG3) is fixed on band body side surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420261476.6U CN203914906U (en) | 2014-05-21 | 2014-05-21 | A kind of electrocardio testing circuit and electronic equipment |
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| CN201420261476.6U CN203914906U (en) | 2014-05-21 | 2014-05-21 | A kind of electrocardio testing circuit and electronic equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018502A1 (en) * | 2016-07-28 | 2018-02-01 | 深圳市沃特沃德股份有限公司 | Method, apparatus and system for determining wearing and removal of animal wearable device |
| CN108309282A (en) * | 2018-03-26 | 2018-07-24 | 华南理工大学 | A kind of ECG detecting foot ring and its detection method |
| CN109361982A (en) * | 2018-11-26 | 2019-02-19 | 歌尔股份有限公司 | The driving circuit and heart rate earphone of earphone |
| CN112568906A (en) * | 2019-09-29 | 2021-03-30 | Oppo广东移动通信有限公司 | Detection circuit, wearable device detection method and wearable device |
-
2014
- 2014-05-21 CN CN201420261476.6U patent/CN203914906U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018502A1 (en) * | 2016-07-28 | 2018-02-01 | 深圳市沃特沃德股份有限公司 | Method, apparatus and system for determining wearing and removal of animal wearable device |
| CN108309282A (en) * | 2018-03-26 | 2018-07-24 | 华南理工大学 | A kind of ECG detecting foot ring and its detection method |
| CN109361982A (en) * | 2018-11-26 | 2019-02-19 | 歌尔股份有限公司 | The driving circuit and heart rate earphone of earphone |
| CN109361982B (en) * | 2018-11-26 | 2020-04-10 | 歌尔股份有限公司 | Drive circuit and rhythm of heart earphone of earphone |
| CN112568906A (en) * | 2019-09-29 | 2021-03-30 | Oppo广东移动通信有限公司 | Detection circuit, wearable device detection method and wearable device |
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Granted publication date: 20141105 |