CN110840441B - Multi-lead wireless wearable monitoring system - Google Patents
Multi-lead wireless wearable monitoring system Download PDFInfo
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- CN110840441B CN110840441B CN201911101634.5A CN201911101634A CN110840441B CN 110840441 B CN110840441 B CN 110840441B CN 201911101634 A CN201911101634 A CN 201911101634A CN 110840441 B CN110840441 B CN 110840441B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0006—ECG or EEG signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
- A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4806—Sleep evaluation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2576/00—Medical imaging apparatus involving image processing or analysis
- A61B2576/02—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part
- A61B2576/023—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part for the heart
Abstract
The invention provides a multi-lead wireless wearable monitoring system, and relates to the technical field of health monitoring. The multi-lead wireless wearable monitoring system comprises an upper computer and at least one lower computer, wherein the upper computer comprises a USB module and terminal equipment; the connection between the upper computer and the lower computer comprises a communication layer and a physical layer, wherein the communication layer realizes a basic communication function and is used for reducing communication conflicts and ensuring the integrity of information; the physical layer realizes the basic receiving and sending functions and receives and processes the data to be sent in the physical layer. The operation command given by the upper computer sends a command packet and a feedback signal to the receiver through a serial port protocol, and the receiver is responsible for receiving and distributing the signals of the upper computer and the data acquisition and transmitting terminal. The invention is used for monitoring the wearer and accords with the medical standard.
Description
Technical Field
The invention relates to the technical field of health monitoring, in particular to a multi-lead wireless wearable monitoring system.
Background
Along with the progress of society and the improvement of people's standard of living, people advocate healthy lifestyle more and more, and the demand of health monitoring appearance is also higher and more. The conventional health monitor is mainly an electrocardio monitor, the function of the conventional health monitor is single, and the traditional electrocardio monitor has the defects of heavy body type, poor portability and obvious defect due to technical limitation. Meanwhile, the communication mode selected by the traditional monitor equipment is not defined aiming at the data format applied by the multichannel biological signals, and the existing communication protocol consumes excessive network resources aiming at a retransmission mechanism, has the possibility of frame loss and is not suitable for medical equipment. The common ZigBee communication protocol also has the problems that the allowed bandwidth cannot be effectively utilized, the working state of the equipment cannot be accurately described, and the working condition of the equipment cannot be accurately recorded.
Therefore, in view of the above situation, it is necessary to develop a novel multi-channel monitoring system suitable for the medical industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multi-lead wireless wearable monitoring system capable of realizing real-time signal transmission.
In order to realize the purpose, the invention provides the following technical scheme:
a multi-lead wireless wearable monitoring system comprises an upper computer and at least one lower computer, wherein the upper computer comprises a USB module and terminal equipment;
the connection between the upper computer and the lower computer comprises a communication layer and a physical layer, wherein the communication layer realizes a basic communication function and is used for reducing communication conflicts and ensuring the integrity of information; the physical layer realizes the basic receiving and sending functions and receives and processes the data to be sent in the physical layer.
In the above technical solution, preferably, the operation command given by the upper computer sends a command packet and a feedback signal to the receiver via a serial protocol, and the receiver is responsible for receiving and distributing signals of the upper computer and the data acquisition and transmission terminal.
In the above technical solution, preferably, the specific functions and implementation means of the communication layer are as follows, the upper computer controls the lower computer by giving an operation command through the USB module, the lower computer has a sampling function and a data sending function, and data collected and transmitted by the lower computer is displayed by the USB module and stored in the terminal device; the task mechanism of the data acquisition and transmitting end on the lower computer runs in a polling mode and comprises a system task, a sampling task, an information feedback task and an information sending task;
the data acquisition and transmission end comprises a stack type storage area, starts a sampling task after receiving a sampling task starting command packet given by the upper computer and transmits data to the stack type storage area to wait for transmission;
the data acquisition and transmitting end starts an information sending task and transmits a data packet after receiving a command packet given by the upper computer, and the upper computer sends a data feedback packet after receiving the data packet; the data acquisition and transmitting terminal determines that the upper computer receives the data packet after receiving the data feedback packet, and retransmits the data packet after determining that the data feedback packet is not received;
in the above technical solution, preferably, the information sending task includes a retransmission mechanism, where the retransmission mechanism triggers different tasks according to the sending times of the same data packet, and sends the data packet normally in the first sending, prolongs the sending time in the second sending, changes the sending sequence to send again in the third sending, and starts a sending failure task and gives an alarm in the fourth sending.
In the above technical solution, preferably, the data packet includes a control byte, a short timestamp and a data record, the control byte and the short timestamp include an identification bit, a sequence bit, a time bit, a module bit, a channel number and data precision, and the module bit includes at least one of a electrocardiographic module and an electromyographic module; the data records comprise sampling time and specific data of a used channel;
the feedback packet is a single byte and comprises a control byte, a packet identification bit and a packet sequence number.
In the above technical solution, preferably, after the stacked storage area reaches the storage limit, the data acquisition and transmission end marks a blocking state and performs system state transition, and after the state transition is completed and communication is realized again, the receiver sends alarm information.
In the above technical solution, preferably, when the data acquisition and transmission end changes its own state and returns to a normal communication state, a feedback packet is sent to the upper computer and continues to work, and meanwhile, the problem data is marked.
In the foregoing technical solution, preferably, the basic structure of the physical layer includes: the lower computer comprises a singlechip, a signal acquisition module, a wireless transmission module and a storage module, wherein the signal acquisition module, the wireless transmission module and the storage module are connected with the singlechip; the wireless transmitting module comprises a radio frequency transmitting chip, a power amplifier and an antenna, wherein the radio frequency transmitting chip is connected with the singlechip through a standard SPI, and after the radio frequency transmitting chip receives an acquired signal through the SPI, the signal is accessed to the antenna through the power amplifier to realize wireless signal transmission; the USB module comprises a single chip microcomputer chip, a power amplifier, an antenna, a USB interface chip, a wireless receiving chip and a transformer chip.
In the above technical solution, preferably, the upper computer and the lower computer are wirelessly connected by any one of a Z-MED protocol, a ZigBee bluetooth mesh, thread, or Sub-G.
In the above technical scheme, preferably, the lower computer further comprises a battery module, and the battery module is electrically connected with the single chip microcomputer and used for monitoring the battery voltage so as to display the voltage and give an alarm at a low voltage.
In the above technical solution, preferably, the battery module includes at least two transformers.
Compared with the prior art, the invention has the following advantages and beneficial effects:
on the aspect of communication, the invention optimizes the use efficiency of the system memory; by simplifying the command and data structure and the feedback information, the communication efficiency between the devices is optimized; compared with the traditional communication protocol, the retransmission mechanism is optimized, and the state machine can automatically recover the working state and automatically mark the related problem data after the problem occurs, thereby effectively ensuring the communication quality; meanwhile, the communication protocol has better expansibility and supports the addition of a plurality of signal acquisition devices. On the physical aspect, the invention not only realizes the real-time transmission of signals, but also solves the problems of overlarge volume and inconvenient carrying of the traditional wearable monitoring equipment by carrying out brand new design on a circuit system, and the equipment equipped with the system has the advantages of small volume and light weight and can be better worn on the clothes such as a binding belt, a vest, a corsage, a sportswear and the like; meanwhile, the improved circuit system does not need to independently assemble amplifiers and digital-to-analog converters for all signals acquired by the electrodes, so that the power consumption of the circuit is effectively reduced; the circuit can be further expanded, and besides the electrocardio monitoring, the circuit can also realize various human body signal monitoring such as sleep monitoring and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a first use of the system of the present invention;
FIG. 2 is a front view of a second schematic use of the system of the present invention;
FIG. 3 is a rear view of a second schematic use of the system of the present invention; comprises a second acquisition system (3) capable of expanding leads and a second battery (7).
FIG. 4 is a diagram of the lower level components of the system of the present invention;
FIG. 5 is a diagram of a data receiving interface of an upper computer terminal device in the system of the present invention;
FIG. 6 is a flow chart of the operation of the lower computer of the system of the present invention;
FIG. 7 is a block diagram of a data packet and a command packet in the system of the present invention;
FIG. 8 is a state machine of a lower computer in the system of the present invention.
Wherein, the number in the figure is 1, electrode; 2, binding a belt; 3, a data acquisition and transmitting terminal; 4. a wire; 5. an elastic restraining strip securing zone; 6. a wire; 7. a battery; 8 terminal devices, N, F, C-C6 are all electrodes, and V3R, V4R, V R, V, V8 and V9 are all electrodes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Embodiments of the invention are described in further detail below with reference to figures 1-8:
the invention provides a multi-lead wireless wearable monitoring system which comprises an upper computer and at least one lower computer, wherein the upper computer comprises a USB module and terminal equipment; the connection between the upper computer and the lower computer comprises a communication layer and a physical layer, wherein the communication layer realizes a basic communication function and is used for reducing communication conflict and ensuring the integrity of information; the physical layer realizes the basic receiving and sending functions and receives and processes the data to be sent in the physical layer.
As an optional implementation manner, the specific functions and implementation means of the communication layer are as follows, the upper computer gives an operation command through the USB module to control the lower computer, the lower computer has a sampling function and a data sending function, and data collected and transmitted by the lower computer is displayed through the USB module and stored on the terminal device; and a task mechanism of a data acquisition and transmitting end on the lower computer runs in a zstack polling mode and comprises a system task, a sampling task, an information feedback task and an information sending task.
The data acquisition and transmitting terminal comprises a stack type storage area, the size of the stack type storage area is dynamically adjustable, a sampling task is started and related modules are sampled after a sampling task starting command packet given by an upper computer is received, and the data packet is sent to the stack type storage area to wait for transmission after the size of the data packet reaches the optimized length.
It should be noted that the upper computer is connected to the receiver through a serial port protocol (USB protocol), the upper computer sends a command packet and a feedback signal (data feedback packet) to the receiver through the USB protocol, and the receiver is responsible for receiving and distributing signals of the upper computer and the data acquisition and transmission terminal, where the signals of the data acquisition and transmission terminal are wireless signals.
The data acquisition and transmission end starts an information transmission task and transmits a data packet after receiving a command packet given by the upper computer, and the upper computer sends a data feedback packet after receiving the data packet; and the data acquisition and transmission end determines that the upper computer receives the data packet after receiving the data feedback packet, and retransmits the data packet after determining that the data feedback packet is not received.
The data feedback packet is used as a response mechanism, so that the communication safety is effectively ensured.
As an optional implementation mode, the information transmission task comprises a retransmission mechanism, wherein the retransmission mechanism triggers different tasks according to the transmission times of the same data packet, the information is normally transmitted during the first transmission, the transmission time is prolonged during the second transmission, the transmission sequence is changed and the information is transmitted again during the third transmission, and the transmission failure task is started and an alarm is given during the fourth transmission.
It should be noted that the command packet is retransmitted when the upper computer does not receive the feedback packet of the correct command within a certain time. The certain time can be defined according to the actual requirement.
Particularly, when the data transmission is completed and the receiver successfully receives the data packet, the receiver can transmit a feedback packet according to the command sequence number and the data acquisition and transmission end, and the data acquisition and transmission end can push out the related packet and release the memory after receiving the feedback packet. And automatically prolonging the sending time interval when the sending feedback is correspondingly unable to be sent in time, and under the condition that the sending is continuously correspondingly unable to be sent in time, jumping to the next data packet waiting for sending and re-trying to send the unsuccessfully sent packet after the data packet is successfully sent.
The above process is shown in fig. 6.
It should be noted that, after the above operations may cause a plurality of data packets to be stored in the stacked storage area, and the stacked storage area reaches the storage limit, as an optional implementation, the data acquisition and transmission end may mark a blocking state and perform system state transition, and send alarm information to the receiver after completing the state transition and re-implementing communication.
In order to facilitate effective transmission of data among different devices, the data format coding of the application layer needs to be compatible with the use of byte space, and is suitable for the expansibility of different data acquisition requirements.
The scheme comprises three types of data structure definitions including a data packet, a command packet and a feedback packet. Different packets are distinguished by packet identification bits.
The command packet is sent by the upper computer to control the data acquisition and transmitting terminal. The command packet sent by the upper computer has a variable length and may be one to multiple bytes, as shown in fig. 7, including a single-byte control byte and a multi-byte command parameter, where the command parameter may be null. Common command packets such as initialization, restart, operation, stop and shutdown are single-byte commands, so that the communication efficiency can be improved; the rest of the commands with the unusual use or the multi-parameter commands can be adjusted into multi-byte commands according to actual needs, and the multi-byte commands comprise control bytes and command parameters. The purpose of the above setting is to reduce the data volume and improve the system working efficiency.
The data packet is sent by the data acquisition and transmission end and contains the acquired data, as shown in fig. 7. The data packets are multi-byte and, depending on the particular application, may compress unneeded data bits to reduce the amount of data. The data packet comprises control bytes (used for identifying the type of the packet, identifying a source module and a channel, sequencing the packet and data length information), a short time stamp and data records, wherein the control bytes and the short time stamp comprise an identification bit, a sequence bit, a time bit, a module bit, a channel number and data precision, and the module bit comprises at least one of a cardiac electric module and a myoelectric module; the data record comprises sampling time and specific data of a used channel; the module bit, the channel number and the data precision can ensure that different data samples can share the same data acquisition and transmission system. The data of the module bit can be adjusted according to actual needs.
It should be noted that the data packet may contain multiple times of sampling and specific data.
The feedback packet is a single byte and is divided into a command and state feedback packet and a data feedback packet according to different feedback information. The feedback packet includes a control byte, a packet identification bit, and a packet sequence number.
Compared with the traditional ZigBee state machine, the data acquisition and transmitting end expands the state machine, and as shown in FIG. 4, when the state of the data acquisition and transmitting end changes and returns to a normal communication state, a feedback packet is sent to the upper computer and continues working, and meanwhile, problem data are marked.
The device provided with the data acquisition and transmission end is an independent device and is correspondingly provided with a power supply, so that the data acquisition and transmission end needs to monitor the voltage condition of the power supply at the same time, display warning when the voltage is reduced to a threshold value 1 and inform a receiver of synchronously displaying an alarm on an upper computer; when the voltage continues to drop to a threshold value 2, the lamp is flashed, the buzzer alarms, the receiver is informed, the upper computer finishes the acquisition task, the alarm is displayed, and then the data acquisition and transmitting end is closed to protect the battery.
The working flow of the communication protocol is as follows.
A receiver:
(1) And the receiver starts to monitor wireless and control signals from an upper computer in a polling mode after the system initialization is finished, wherein the polling mode is zstack.
(2) When the receiver receives the wireless data packet, the integrity of the data packet is judged, and if the data packet is complete, a feedback packet is sent to the data acquisition and transmitting terminal wirelessly; if not, the data acquisition and transmission system will not be answered. Meanwhile, the receiver can forward the received data to the upper computer and then turn into a polling state.
(3) When the receiver receives a data packet (namely a command packet) sent by the upper computer, the data packet is directly forwarded to the corresponding data acquisition and transmitting terminals according to the addresses of the data acquisition and transmitting terminals (a plurality of data acquisition and transmitting terminals may be needed during use, and therefore the data packet needs to be sent to the corresponding ports), and at the moment, the data acquisition and transmitting terminals process the command packet and send corresponding feedback packets to the receiver to indicate that the command is successfully received.
The terminal equipment of the upper computer can display the multi-channel data after receiving the multi-channel data, and an interface of the terminal equipment is shown in fig. 5.
The data acquisition and transmission end works in a polling mode:
(1) The data acquisition and transmission end enters a polling state after the system initialization is finished, and besides processing corresponding hardware system feedback, a sampling task, an information feedback task and an information sending task are required to be finished simultaneously.
(2) When a sampling command is received, the data acquisition and transmission end starts sampling and packs data, when the packet length meets the requirement, a new packet is established, the completed data packet is pushed into a stack, a transmission packet is set according to the state of the transmission packet, and an information transmission task is started;
the data acquisition and transmitting end also comprises a state machine which runs in real time, and can send a state feedback packet to inform an upper computer when the state changes.
(3) After the information sending task starts, the data in the stack are sent in sequence, and the receiver feeds back each data packet after receiving the data packet. If the data acquisition and transmission end does not receive the corresponding data feedback packet, the data will be retransmitted, and corresponding processing is performed according to the retransmission times, and the specific processing mode is shown in fig. 2.
(4) The information feedback task is a flow for carrying out corresponding processing on corresponding commands and data feedback results: when receiving initialization, restart, operation, stop and shutdown commands, firstly sending a command receiving success feedback packet and executing corresponding operation; and when a data transmission feedback packet is received, emptying, reordering and alarming the data in the stack according to the feedback state.
(5) The upper computer can send out control commands, receive data of the data acquisition and transmitting terminals, store the data and draw pictures through screen operation.
(6) When the network is reconnected after interruption, the state in the data acquisition and transmitting terminal can be recovered to work according to the previous state and the time mark of the problem data is sent to the receiver, so that the reconnection is not needed to be initialized, and the time is saved; the state machine may display six states and corresponding state transition mechanisms, as shown in FIG. 8.
The basic structure of the multi-lead wireless wearable monitoring system on the physical layer comprises: the lower computer comprises a single chip microcomputer, a signal acquisition module, a wireless transmission module and a storage module, wherein the signal acquisition module is connected with the single chip microcomputer and comprises a plurality of electrodes, a protection circuit and a biological signal acquisition chip; the wireless transmitting module comprises a radio frequency transmitting chip, a power amplifier and an antenna, wherein the radio frequency transmitting chip is connected with the singlechip through a standard SPI, and when the radio frequency transmitting chip receives an acquired signal through the SPI, the signal is accessed to the antenna through the power amplifier to realize wireless signal transmission; the USB module comprises a single chip microcomputer chip, a power amplifier, an antenna, a USB interface chip, a wireless receiving chip and a transformer chip.
The upper computer can identify and control 1-10 lower computers and more than 10 lower computers, namely, the upper computer can identify and control a plurality of signal acquisition modules and wireless transmission modules simultaneously. It should be noted that the terminal device may be a handheld device or a computer terminal, and the receiving, displaying, storing and analyzing of the lower computer signal can be realized only by inserting the corresponding USB module into the terminal device.
In order to facilitate communication, the upper computer and the lower computer can be in wireless connection in any mode of a Z-MED protocol, zigBee Bluetooth mesh, thread or Sub-G, and preferably adopt a ZigBee-based multi-channel communication protocol.
Because the lower computer is used as a wearable mobile device and needs to be fixed on clothes of a wearer, the size is small, the weight is light, and the circuit can be integrated on a very small PCB circuit board, so that after the lower computer is designed according to the content, the projection area of the circuit board is about 8cm 2 According to the particular industrial settingThe meter and battery assembly requirements can be further reduced; or as a single layer circuit board while increasing the area.
As an optional implementation manner, the lower computer further includes a battery module, the battery module is electrically connected to the single chip microcomputer, and the single chip microcomputer monitors the voltage of the power supply through a digital-to-analog conversion interface to display the voltage and alarm the low voltage.
Because the biological signal acquisition circuit needs a noiseless power supply, the battery module (which can be a lithium battery, a common battery or a flexible battery) supplies power to the part of the circuit through an independent transformer (preferably TPS 73230), which is called AVDD, namely a noiseless direct current voltage (which can be constant 3.3V or 2.5V). The other circuit parts have low requirements on power supply noise, and are uniformly supplied with power by another transformer, which is called DVDD, and is also a direct current voltage (for example, the voltage can be constant 3.3V or 2.5V), but the noise is relatively large. Thus, the battery module includes at least two transformers.
As shown in fig. 4, one end of a plurality of electrodes (generally 6 to 10 electrodes) in the lower computer is connected to a circuit board interface, and is connected to a signal acquisition module through an ESD protection circuit (for example, SP724 is preferred here), because the system is used for human body monitoring, the module is a biological signal acquisition chip (ADS 129x is preferred); the acquired signals are transmitted to a wireless transmitting module through a digital communication protocol (preferably an SPI protocol) by a single chip microcomputer (preferably an MSP43 x), the module is a radio frequency transmitting chip (preferably CC2652 or CC 2530), and corresponding data are stored in a storage module in a file format, and the storage module is an onboard memory card. The SPI signal is a standard 4-wire signal, the single chip microcomputer is a master, and the biological acquisition chip and the SD card are slaves respectively.
The clock used by the biological signal acquisition chip is provided by the singlechip, so that a crystal oscillator is saved, and the volume is further reduced.
And the radio frequency transmitting chip (CC 26xx/25 xx) is connected with the singlechip through a standard SPI. And the single chip microcomputer is used as a master, and the radio frequency transmitting chip is used as a slave. And after the radio frequency transmitting chip receives the acquired digital signal through the SPI, the signal is accessed to the antenna through the power amplifier, and wireless signal transmission is realized.
Meanwhile, the single chip microcomputer can monitor the battery voltage in real time through a digital-to-analog conversion interface so as to display the voltage and give an alarm at low voltage.
The USB module in the upper computer preferably adopts a Zigbee protocol to keep communication with the lower computer, and the signal receiving is preferably CC2652 or CC2530. If CC2530 without USB interface is used, an additional USB to serial chip (preferably CP210X or CH 430) is needed to connect the USB module and the terminal device. To improve the communication quality of the transmitted and received radio signals, a power amplifier (preferably CC 2592) may be added in front of the antenna.
The USB module needs power consumption when working, so that the USB module can be directly powered by a computer or handheld equipment through a USB. Because the USB power supply is 5V, an additional voltage stabilizer is required to be added to convert the USB power supply into 3.3V direct current to supply power to the singlechip and the wireless receiving chip (preferably CC26 xx).
The communication between the terminal equipment and the singlechip is directly realized by adopting a USB protocol. The single chip microcomputer and the wireless receiving chip adopt a standard SPI protocol. The wireless receiving chip transmits the radio frequency signal out through the antenna.
The system can be worn on clothes such as vests, straps or sports wear when in use, and the wearing position can be changed according to actual needs, as shown in fig. 1-3, electrodes are placed at a plurality of positions of the straps, the electrodes at each position are provided with a plurality of electrodes, the electrodes at different positions are connected through leads, a power supply and a data acquisition and transmitting terminal (including a signal acquisition module and a wireless transmitting module) connected with the leads are further fixed in the binding belt, and according to the position change of the electrodes, the power supply and the data acquisition and transmitting terminal, a plurality of different implementation modes can be provided for monitoring different data: as shown in fig. 1, the data acquisition and emission end and the battery are respectively located on the chest and waist binding belts, and the electrodes are distributed at two ends of the two crossed binding belts and the part of the chest binding belt except the left side; in fig. 2, the data acquisition and transmission terminal and the battery are integrated in the same cavity to save volume and increase protection, and at this time, the data acquisition and transmission terminal is located on the waist binding band, and at this time, the electrodes are distributed at two ends of two crossed binding bands and the chest binding band, so that biological signals of all marked parts in the right side diagram can be detected; it can be seen from fig. 3 that the back of the human body is also provided with a second data acquisition and emission terminal and a battery, the data acquisition and emission terminal and the battery are both located on the waist binding belt, and the electrodes are distributed on the left side of the chest binding belt at this time, so that the biological signals of the part marked on the right side of the figure can be detected.
Fig. 2-3 illustrate that the system has better expansibility, and can easily realize more leads.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. A multi-lead wireless wearable monitoring system is characterized by comprising an upper computer and at least one lower computer, wherein the upper computer comprises a USB module and terminal equipment;
the connection between the upper computer and the lower computer comprises a communication layer and a physical layer, wherein the communication layer realizes a basic communication function and is used for reducing communication conflicts and ensuring the integrity of information; the physical layer realizes the basic receiving and sending functions and receives and processes the data to be sent in the physical layer;
the specific functions and implementation means of the communication layer are as follows, the upper computer controls the lower computer by giving an operation command through the USB module, the lower computer has a sampling function and a data sending function, and data collected and transmitted by the lower computer is displayed through the USB module and stored on the terminal equipment; the task mechanism of the data acquisition and transmitting end on the lower computer runs in a polling mode and comprises a sampling task, an information feedback task and an information sending task;
the data acquisition and transmission end comprises a stack type storage area, starts a sampling task after receiving a sampling task starting command packet given by the upper computer and transmits data to the stack type storage area to wait for transmission;
the data acquisition and transmission end starts an information transmission task and transmits a data packet after receiving a command packet given by the upper computer, and the upper computer sends a data feedback packet after receiving the data packet; the data acquisition and transmitting terminal determines that the upper computer receives the data packet after receiving the data feedback packet, and retransmits the data packet after determining that the data feedback packet is not received;
the information sending task comprises a retransmission mechanism, wherein the retransmission mechanism triggers different tasks according to the sending times of the same data packet, normal sending is carried out during primary sending, sending time is prolonged during secondary sending, a sending sequence is changed during tertiary sending, sending is carried out again, and a sending failure task is started and an alarm is given out during quaternary sending.
2. The multi-lead wireless wearable monitoring system according to claim 1, wherein the data packet contains control bytes, a short timestamp, and a data record, the control bytes and the short timestamp comprising identification bits, sequence bits, temporal bits, module bits, channel numbers, and data precision, the module bits comprising at least one of a ecg module, an emg module; the data records comprise sampling time and specific data of a used channel;
the feedback packet is a single byte and comprises a control byte, a packet identification bit and a packet sequence number.
3. The multi-lead wireless wearable monitoring system according to claim 1, wherein the data collection and transmission end marks a blocking state and performs a system state transition after the stacked storage area reaches a storage limit, and sends an alarm message to a receiver after the state transition is completed and communication is re-implemented.
4. The multi-lead wireless wearable monitoring system according to claim 1, wherein when the data collection and transmission end changes its state and returns to a normal communication state, a feedback packet is sent to the upper computer and continues to work while problem data is being marked.
5. The multi-lead wireless wearable monitoring system according to claim 1, wherein the upper computer and the lower computer are wirelessly connected by any one of a Z-MED protocol, zigBee Bluetooth mesh, thread or Sub-G.
6. The multi-lead wireless wearable monitoring system according to claim 1, wherein the basic structure of the physical layer comprises: the lower computer comprises a single chip microcomputer, a signal acquisition module, a wireless transmission module and a storage module, wherein the signal acquisition module is connected with the single chip microcomputer and comprises a plurality of electrodes, a protection circuit and a biological signal acquisition chip; the wireless transmitting module comprises a radio frequency transmitting chip, a power amplifier and an antenna, wherein the radio frequency transmitting chip is connected with the singlechip through a standard SPI, and after the radio frequency transmitting chip receives an acquired signal through the SPI, the signal is accessed to the antenna through the power amplifier to realize wireless signal transmission; the USB module comprises a single chip microcomputer chip, a power amplifier, an antenna, a USB interface chip, a wireless receiving chip and a transformer chip.
7. The multi-lead wireless wearable monitoring system according to claim 6, wherein the lower computer further comprises a battery module electrically connected to the single chip for monitoring battery voltage to display voltage and low voltage alarms.
8. The multi-lead wireless wearable monitoring system of claim 7, wherein the battery module comprises at least two transformers.
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