Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an annular belt-shaped wireless portable electrocardiograph monitoring system. The technical problems to be solved by the invention are realized by the following technical scheme:
The invention provides an annular banded wireless portable electrocardiograph monitoring system, which comprises: a signal acquisition device and a signal processing device, wherein,
The signal acquisition device is used for acquiring an electrocardio analog signal, and the signal processing device is used for processing the electrocardio analog signal to obtain an electrocardio digital signal and transmitting the electrocardio digital signal to the terminal equipment;
The signal acquisition device comprises a plurality of coupling circuit electrode patches, and the electrocardio analog signals are acquired by attaching the coupling circuit electrode patches on the trunk and heart positions of a human body;
the signal processing device comprises an annular band-shaped binding band and a signal processing module arranged on the annular band-shaped binding band, wherein a plurality of first connecting pieces are arranged on the annular band-shaped binding band and are correspondingly connected with the coupling circuit electrode patches;
The signal processing module is connected with the signal acquisition device through the first connecting piece and a plurality of wires paved inside the annular band-shaped binding band.
In one embodiment of the present invention, the signal acquisition device includes a right upper limb coupling circuit electrode patch, a left upper limb coupling circuit electrode patch, a right lower limb coupling circuit electrode patch, a left lower limb coupling circuit electrode patch, a first chest coupling circuit electrode patch, a second chest coupling circuit electrode patch, a third chest coupling circuit electrode patch, a fourth chest coupling circuit electrode patch, a fifth chest coupling circuit electrode patch, and a sixth chest coupling circuit electrode patch.
In one embodiment of the invention, the coupling circuit electrode patch comprises a conductive graphene electrode, a filter circuit module and a second connector connected in sequence, wherein,
The conductive graphene electrode is used for collecting original electrocardiosignals;
The filter circuit module is used for carrying out filter processing on the original electrocardiosignal to obtain the electrocardiosignal;
the second connecting piece is correspondingly connected with the first connecting piece arranged on the annular banded binding band.
In one embodiment of the present invention, the filtering circuit module includes a notch filtering unit, a low-pass filtering unit, and a high-pass filtering unit connected in sequence; the notch filter unit, the low-pass filter unit and the high-pass filter unit sequentially carry out filter processing on the original electrocardiosignals, and interference signals are filtered to obtain electrocardiosignals.
In one embodiment of the invention, the signal processing module comprises a main control unit, an electrocardiosignal processing unit, a wireless transmission unit and a power management unit, wherein,
The main control unit is used for controlling the electrocardio signal processing unit to process the electrocardio analog signal, sending the received electrocardio digital signal to the wireless transmission unit and controlling the wireless transmission unit to perform data transmission;
the electrocardiosignal processing unit is used for carrying out differential, amplification and digital-to-analog conversion processing on the electrocardiosignal analog signals according to the first control signals sent by the main control unit to obtain the electrocardiosignal digital signals, and sending the electrocardiosignal digital signals to the main control unit;
the wireless transmission unit is used for wirelessly transmitting the electrocardio digital signals to the terminal equipment according to the second control signals sent by the main control unit;
the power management unit is used for supplying power to the electrocardiosignal processing unit, the main control unit and the wireless transmission unit.
In one embodiment of the invention, the master control unit is an STM32F103 microcontroller.
In one embodiment of the invention, the electrocardiosignal processing unit comprises a first ADS1296 chip and a second ADS1296 chip, wherein,
The DIN pins of the first ADS1296 chip and the second ADS1296 chip receive the control signal;
the DOUT pins of the first ADS1296 chip and the second ADS1296 chip output the electrocardio digital signals;
An IN1P pin of the first ADS1296 chip is connected with the electrode patch of the right upper limb coupling circuit, an IN1N pin is connected with the electrode patch of the left upper limb coupling circuit, an IN2P pin is connected with the electrode patch of the left lower limb coupling circuit, and an IN2N pin multiplexes signals obtained by an IN1N pin lead wire of the first ADS1296 chip;
The RDLOUT pin of the first ADS1296 chip is connected with the electrode patch of the right lower limb coupling circuit;
The IN3P, IN4P, IN5P, IN P, IN7P, IN P pin of the second ADS1296 chip is correspondingly connected with the first chest coupling circuit electrode patch, the second chest coupling circuit electrode patch, the third chest coupling circuit electrode patch, the fourth chest coupling circuit electrode patch, the fifth chest coupling circuit electrode patch and the sixth chest coupling circuit electrode patch respectively;
the IN3N, IN4N, IN5N, IN N, IN7N, IN N pins of the second ADS1296 chip are connected to the WCT pins of the first ADS1296 chip.
In one embodiment of the present invention, the wireless transmission unit is a bluetooth module.
Compared with the prior art, the invention has the beneficial effects that:
the annular banded wireless portable electrocardiograph monitoring system has the advantages of small volume, wireless data transmission, no limitation of walking of a human body in the use process, small total contact area with the human body and no limitation of use under the hot summer condition.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Detailed Description
In order to further explain the technical means and effects adopted by the invention to achieve the preset aim, the following describes in detail an annular belt-shaped wireless portable electrocardiograph monitoring system according to the invention with reference to the attached drawings and the specific embodiments.
The foregoing and other features, aspects, and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments when taken in conjunction with the accompanying drawings. The technical means and effects adopted by the present invention to achieve the intended purpose can be more deeply and specifically understood through the description of the specific embodiments, however, the attached drawings are provided for reference and description only, and are not intended to limit the technical scheme of the present invention.
Example 1
Referring to fig. 1 in combination, fig. 1 is a block diagram of a wireless portable electrocardiograph monitoring system in a ring-shaped band shape according to an embodiment of the present invention, as shown in the drawing, the wireless portable electrocardiograph monitoring system in a ring-shaped band shape of the embodiment includes: the system comprises a signal acquisition device 100 and a signal processing device 200, wherein the signal acquisition device 100 is used for acquiring an electrocardio analog signal, and the signal processing device 200 is used for processing the electrocardio analog signal to obtain an electrocardio digital signal and transmitting the electrocardio digital signal to a terminal device.
In this embodiment, the signal acquisition device 100 includes a plurality of coupling circuit electrode patches 101, and acquires an electrocardiographic analog signal by attaching the coupling circuit electrode patches 101 to the trunk and the heart of a human body.
Further, the signal processing device 200 comprises an annular band-shaped bandage 201 and a signal processing module 202 arranged on the annular band-shaped bandage 201, wherein a plurality of first connecting pieces 203 are arranged on the annular band-shaped bandage 201, and the first connecting pieces 203 are correspondingly connected with the coupling circuit electrode patch 101; the signal processing module 202 is connected to the signal acquisition device 100 by means of a first connection 203, a number of wires laid inside the endless belt-like band.
Specifically, in the present embodiment, the signal acquisition device 100 includes 8 coupling circuit electrode patches 101, which are a right upper limb coupling circuit electrode patch RA, a left upper limb coupling circuit electrode patch LA, a right lower limb coupling circuit electrode patch RL, a left lower limb coupling circuit electrode patch LL, a first chest coupling circuit electrode patch V1, a second chest coupling circuit electrode patch V2, a third chest coupling circuit electrode patch V3, a fourth chest coupling circuit electrode patch V4, a fifth chest coupling circuit electrode patch V5, and a sixth chest coupling circuit electrode patch V6, respectively.
In the working process of the annular belt-shaped wireless portable electrocardiograph monitoring system, a right upper limb coupling circuit electrode patch RA, a left upper limb coupling circuit electrode patch LA, a right lower limb coupling circuit electrode patch RL and a left lower limb coupling circuit electrode patch LL are respectively attached to the positions of the upper right part, the upper left part, the lower right part and the lower left part of the trunk of a human body, and a first chest coupling circuit electrode patch V1, a second chest coupling circuit electrode patch V2, a third chest coupling circuit electrode patch V3, a fourth chest coupling circuit electrode patch V4, a fifth chest coupling circuit electrode patch V5 and a sixth chest coupling circuit electrode patch V6 are sequentially attached to the heart position of the human body.
Further, referring to fig. 2 in combination, fig. 2 is a schematic structural diagram of a coupling circuit electrode patch according to an embodiment of the present invention. As shown in the drawing, the coupling circuit electrode patch 101 of the present embodiment includes a conductive graphene electrode 1011, a filter circuit module 1012, and a second connector 1013 connected in sequence, and in the present embodiment, the conductive graphene electrode 1011, the filter circuit module 1012, and the second connector 1013 are all connected by a lead wire.
Specifically, the conductive graphene electrode 101 is used for collecting an original electrocardiosignal; the filter circuit module is used for performing filter processing on the original electrocardiosignal to obtain an electrocardiosignal analog signal; second connector 1013 is connected to first connector 203 provided on endless belt-like band 201.
In this embodiment, the conductive graphene electrode 1011 is made of a flexible graphene electrode material, and is attached to a human body to collect an original electrocardiographic signal, and the flexible graphene electrode material has good biocompatibility, so that no offence and sense and wearing sense can be achieved, and the conductive graphene electrode is nontoxic and harmless, does not damage the skin after being worn for a long time, and is more suitable for a scene needing long-term monitoring.
Further, the filtering circuit module 1012 includes a notch filtering unit, a low-pass filtering unit and a high-pass filtering unit that are sequentially connected, where the notch filtering unit, the low-pass filtering unit and the high-pass filtering unit sequentially perform filtering processing on the original electrocardiograph signal, and filter the interference signal to obtain an electrocardiograph analog signal.
Optionally, in this embodiment, the notch filter unit is a 50Hz notch filter, the low-pass filter unit is a 100Hz fourth-order butterworth low-pass filter, the high-pass filter unit is a fourth-order 0.05Hz butterworth Wo Sigao-pass filter, a specific circuit structure is shown in fig. 3, fig. 3 is a circuit diagram of a filter circuit module provided in the embodiment of the present invention, and in the design and device selection of the active circuit, an LM6144 amplifier is selected as an operational amplifier component of the design.
Optionally, the second connecting piece 1013 is a button female buckle, and the first connecting piece 203 is a button male buckle.
Further, referring to fig. 5, fig. 5 is a block diagram of a signal processing module according to an embodiment of the present invention, and as shown in the drawing, the signal processing module 202 includes a main control unit 2021, an electrocardiosignal processing unit 2022, a wireless transmission unit 2023 and a power management unit 2024. In this embodiment, the main control unit 2021, the electrocardiosignal processing unit 2022, the wireless transmission unit 2023 and the power management unit 202 are integrated on a hardware PCB, as shown in fig. 4, and fig. 4 is a schematic diagram of a signal processing apparatus according to an embodiment of the invention.
Specifically, the main control unit 2021 is configured to control the electrocardio signal processing unit 2022 to process an electrocardio analog signal, send a received electrocardio digital signal to the wireless transmission 2023 unit, and control the wireless transmission unit 2023 to perform data transmission; the electrocardio signal processing unit 2022 is configured to perform differential, amplification and digital-to-analog conversion processing on an electrocardio analog signal according to the first control signal sent by the main control unit 2021, obtain an electrocardio digital signal, and send the electrocardio digital signal to the main control unit 2021; the wireless transmission unit 2023 is configured to wirelessly transmit the electrocardiographic digital signal to the terminal device according to the second control signal sent by the main control unit 2021; the power management unit 2024 is configured to supply power to the electrocardiograph signal processing unit 2021, the main control unit 2022, and the wireless transmission unit 2023.
In this embodiment, the main control unit 2021 is an STM32F103 microcontroller, the electrocardiosignal processing unit 2022 includes two ADS1296 chips, and the wireless transmission unit 2023 is a bluetooth module, which is bluetooth HC-05.
Referring to fig. 6, fig. 6 is a circuit diagram of a master control unit according to an embodiment of the present invention, in which an STM32F103 microcontroller based on a 32-bit Cortex-M3 central processing unit is selected as the master control unit 2021, specifically, an ADS1296 chip of the electrocardiosignal processing unit 2022 uses SPI (Serial Peripheral Interface) serial peripheral interface buses for data communication. SPI works in master-slave mode, which typically has one master device and one or more slave devices, requiring at least 4 wires: data In (SDI), data out (SDO), bus clock (SCLK), chip Select (CS). In this embodiment, both ADS1296 chips communicate with slave identity, and the MCU (microcontroller) performs chip control command input, register data configuration writing, and data readout after completion of acquisition on the ADS1296 chips with host identity.
Specifically, in the embodiment, a time division multiplexing manner is used, and two ADS1296 chips are respectively controlled through the chip selection signal line 18 pin CS1 and 19 pin CS2 of the STM32F103 microcontroller. The 14-pin READY signal line can send a falling edge signal after the ADS1296 chip finishes data conversion, and is used for prompting the MCU to read converted data into a corresponding memory by controlling a corresponding CS signal and enabling SPI transmission. The RESET signal line of the No. 7 pin of the STM32F103 microcontroller is used for resetting the ADDS1296 chip in the initializing process, and the data acquisition function can be stopped and the ADDS129 chip can be put into a standby mode by controlling the signal line in the running process of the equipment.
Further, the STM32F103 microcontroller inputs and outputs information with the Bluetooth module through RX and TX pins, an EN signal line of Bluetooth HC-05 is a control enabling bit of the Bluetooth module, and an AT signal line is used for identifying whether the AT mode is entered.
Further, the ports corresponding to SWDIO, BOOT0 and SWCLK signal lines of the STM32F103 microcontroller are program writing ports of the design.
Referring to fig. 7 and fig. 8 in combination, fig. 7 is a circuit diagram of an electrocardiograph signal processing unit according to an embodiment of the present invention, and fig. 8 is a schematic diagram of connection between a circuit of the electrocardiograph signal processing unit and a corresponding point of a human body according to an embodiment of the present invention. As shown, in the present embodiment, the electrocardiograph signal processing unit includes a first ADS1296 chip U1 and a second ADS1296 chip U2. Wherein DIN pins of the first ADS1296 chip U1 and the second ADS1296 chip U2 receive control signals; the DOUT pins of the first ADS1296 chip U1 and the second ADS1296 chip U2 output electrocardio digital signals.
It should be noted that, the START1 and START2 signals are used to control the START and stop of sampling of the first ADS1296 chip U1 and the second ADS1296 chip U2, respectively, and in this embodiment, may be used to synchronize sampling moments of the two chips, so as to ensure that data of each channel is collected at the same moment. CS1 and CS2 are used as chip select signal lines for the first ADS1296 chip U1 and the second ADS1296 chip U2, respectively, and when the STM32F103 microcontroller selects which chip select CS, the chip outputs data to the STM32F103 microcontroller through pin DOUT. The CS1 signal wire of the first ADS1296 chip U1 is connected to the No. 18 pin of the STM32F103 microcontroller, and the CS2 signal wire of the second ADS1296 chip U2 is connected to the No. 19 pin of the STM32F103 microcontroller. The signal output DOUT pins of the first ADS1296 chip U1 and the second ADS1296 chip U2 are simultaneously connected to the No. 16 pin of the STM32F103 microcontroller. SCLK is a clock pin for providing a system clock for ADS1296 chip operation, and SCLK pins of the first ADS1296 chip U1 and the second ADS1296 chip U2 are connected to pin 15 of the STM32F103 microcontroller. DIN is a signal input line pin, through which the STM32F103 microcontroller transmits related operation instructions (i.e., first control signals) to the first ADS1296 chip U1 and the second ADS1296 chip U2, and DIN pins of the first ADS1296 chip U1 and the second ADS1296 chip U2 are simultaneously connected to pin 17 of the STM32F103 microcontroller.
Further, an IN1P pin of the first ADS1296 chip U1 is connected to the right upper limb coupling circuit electrode patch RA, an IN1N pin is connected to the left upper limb coupling circuit electrode patch LA, an IN2P pin is connected to the left lower limb coupling circuit electrode patch LL, and an IN2N pin multiplexes signals obtained by the IN1N pin lead wire thereof; the RDLOUT pin of the first ADS1296 chip U1 is connected with the electrode patch RL of the right lower limb coupling circuit, and the RDLOUT pin is used for outputting a right leg driving signal generated in a right leg driving circuit generation channel to the right leg of a human body so as to inhibit common mode interference and improve the accuracy of electrocardiosignals.
Further, pins IN3P, IN4P, IN5P, IN6P, IN7P, IN8P of the second ADS1296 chip U2 are respectively connected to the first chest coupling circuit electrode patch V1, the second chest coupling circuit electrode patch V2, the third chest coupling circuit electrode patch V3, the fourth chest coupling circuit electrode patch V4, the fifth chest coupling circuit electrode patch V5 and the sixth chest coupling circuit electrode patch V6.
IN this embodiment, pins IN3N, IN, 4, N, IN, 5, N, IN, N, IN, 7, N, IN N of the second ADS1296 chip U2 are connected to WCT pins of the first ADS1296 chip U1, and the first ADS1296 chip U1 outputs a WCT signal at the WCT pins, and the signal is used as a reference voltage of the chest lead.
As shown in fig. 8, a simple explanation of the signal processing procedure of the electrocardiograph signal processing unit of the present embodiment is as follows:
The human body electrocardiosignal is obtained by acquiring two paths of limb signals through two electrode plates and then carrying out differential phase subtraction, in the embodiment, the first ADS1296 chip U1 uses two channels, the second ADS1296 chip U2 uses six channels, and each channel is provided with two signal lines INxP and INxN. In the ADS1296, after two signal wires of each channel respectively collect two paths of electric signals, the electric signals are filtered through electromagnetic interference (EMI), then enter the PGA for differential amplification, finally enter the ADC for digital-to-analog conversion, and an electrocardio digital signal is obtained, and the CONTROL is used for controlling the obtained electrocardio digital signal to be sent to an STM32F103 microcontroller. The MUX channel is a multiplexing channel, in which the collected electrocardiosignals of any limb can be multiplexed, in this embodiment, signals of the right upper limb, the left upper limb and the left lower limb are multiplexed, and the wilson center reference voltage is obtained through WCTChl channels. RLDChl generates a channel for the right leg driver circuit in which a right leg driver signal can be generated and output via a pin.
Further, the first ADS1296 chip U1 outputs two additional signals, namely, the WCT signal generated in the WCT channel and the right leg driving signal generated in the RLD channel. The WCT signal provides a reference voltage for the second ADS1296 chip U2 when collecting chest leads, and the right leg driving signal is output to the right leg of the human body through the RLDOUT pin of the first ADS1296 chip U1, so as to inhibit common mode interference and improve the accuracy of the electrocardiosignal.
Thus, in this embodiment, two channels of the first ADS1296 chip U1 may each receive a single cardiac electrical lead. The second ADS1296 chip U2 uses the WCT signal output by the multiplexed first ADS1296 chip U1 as a reference voltage, and performs differential subtraction on the reference voltage and the electrocardiograph signal acquired by IN3P, IN4P, IN5P, IN6P, IN7P, IN P to obtain a corresponding six-path electrocardiograph signal.
Referring to fig. 9, fig. 9 is a circuit diagram of a wireless transmission unit provided in an embodiment of the present invention, as shown in the drawing, in this embodiment, bluetooth HC-05 wirelessly transmits data sent by a master control unit 2021 to a terminal device, which may be a PC terminal or a smart phone terminal.
Specifically, pin 1 TXD and pin 2 RXD of bluetooth HC-05 are respectively connected with pin 12 hc05_tx and pin 13 hc05_rx of the STM32F103 microcontroller, and real-time communication between the two is realized through the pins. The VCC pin of Bluetooth HC-05 is connected with a 3.3V power supply, and the GND pin is grounded. The DS2 pin is a dedicated connection signal lamp, which indicates that the Bluetooth setting has been successful when the DS2 lamp blinks every 500 mS.
Referring to fig. 10, fig. 10 is a circuit diagram of a power management unit according to an embodiment of the present invention, where a CHRG pin and a STDBY pin in the circuit respectively represent a charging state indication output terminal and a charging completion indication output terminal. The charge time pin CHRG outputs a low level indicating that charging is in progress. If the battery voltage is below 2.9v, then the tp4057 will precharge the battery with a small current. When the battery voltage exceeds 2.9V, the battery is charged in a constant current mode, and the charging current is determined by a resistor R38 between the PROG pin and GND. As the battery voltage approaches 4.2V, the charging current gradually decreases, and TP4057 enters a constant voltage charging mode. When the charging current decreases to the end-of-charge threshold, the charging cycle ends and the CHRG pin outputs a high resistance state and the STDBY pin outputs a low potential.
Referring to fig. 11 and fig. 12 in combination, fig. 11 is a schematic view of an application scenario of an annular belt-shaped wireless portable electrocardiograph monitoring system according to an embodiment of the present invention; fig. 12 is a schematic wearing diagram of an annular belt-shaped wireless portable electrocardiograph monitoring system according to an embodiment of the present invention. As shown in the figure, a user attaches the coupling circuit electrode patch 101 to a to-be-measured point of a human body, connects the coupling circuit electrode patch 101 with the annular band-shaped binding band 201 through a button male and female buckle, collects and processes electrocardiosignals, wirelessly transmits the obtained electrocardiosignals to a terminal device, and displays an electrocardiosignal waveform so as to evaluate the health state of the user.
In the embodiment, the volume of the annular belt-shaped wireless portable electrocardiograph monitoring system is smaller, the whole contact area of the annular belt-shaped wireless portable electrocardiograph monitoring system and a human body is only the sum area of patches of points to be detected, the whole contact area of the annular belt-shaped wireless portable electrocardiograph monitoring system and the human body is smaller, the annular belt-shaped wireless portable electrocardiograph monitoring system is not limited in use under the hot summer condition, and the wireless portable electrocardiograph monitoring system is not limited in walking of the human body in the use process by utilizing wireless data transmission.
It should be noted that, this portable electrocardio monitoring system of annular banded wireless is in the use, and the user can be according to own actual need adjustment electrocardio lead quantity.
It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or device comprising the element. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and to simplify the description, and is not indicative or implying that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.