CN111787606B - Body area network sensor synchronization method, body area network sensor synchronization system and wearable biosensor equipment - Google Patents
Body area network sensor synchronization method, body area network sensor synchronization system and wearable biosensor equipment Download PDFInfo
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Abstract
The invention provides a body area network sensor synchronization method, a body area network sensor synchronization system and a wearable biosensor device, wherein the body area network comprises a plurality of wearable biosensor devices and a synchronization service terminal, each wearable biosensor device comprises a main sensor unit and a synchronization signal processing unit, and the method comprises the following steps: the synchronous service terminal sends a wireless synchronous signal in a broadcasting mode; the synchronization signal processing unit of the wearable biosensor device receives the wireless synchronization signal and sends a wired synchronization signal to the connected main sensor unit according to the received wireless synchronization signal; the main sensor unit of the wearable biosensor device adjusts the synchronization mark in the uploaded human vital sign parameters according to the wired synchronization signal received from the synchronization signal processing unit. The invention can reduce the time estimation error caused by the receiving time and the processing mechanism of the wireless synchronous signal, and has smaller dependence on the design of the main sensor unit.
Description
Technical Field
The invention relates to the field of wireless body area networks, in particular to a body area network sensor synchronization method, a body area network sensor synchronization system and wearable biosensor equipment.
Background
With the rapid development of wireless communication technology and wearable biosensor technology, the wearable biosensor is put into practical use from theory. Various vital sign parameters of human body, such as pulse, blood pressure, body temperature, blood oxygen, respiration and the like, can be acquired through the wearable biological sensor so as to be used for diagnosing the health state of the human body.
In wearable human vital sign parameter monitoring, a plurality of sensors are often required to work cooperatively to jointly calculate target parameters required for clinical diagnosis. Continuous blood pressure measurements, e.g. based on PPG (Pulse wave velocity ), often require measurement of multiple PPG and/or ECG (electrocardiogram) parameters, as shown in fig. 1.
The multi-sensor collaborative system often needs different sensors to be worn on different parts of a body, and in order to make a user feel comfortable and beautiful, the sensors are connected through a wireless communication mode to form a body area network (Body Area Network, BAN), and parameters acquired by the sensors are acquired through the body area network to perform collaborative calculation; on the other hand, in order to ensure the reliability of the cooperative calculation of the parameters of the plurality of sensors, it is necessary to refer to the same time coordinates between the respective sensors and to reduce the time error of the samples.
At present, the sensor network time in the body area network is synchronous, and synchronous data packets are transmitted among the sensor nodes mainly through a time synchronization protocol. For example, a reference broadcast synchronization mechanism (RBS) that eliminates errors introduced by the reference node end due to the transmission time and access time by transmitting a synchronization message packet broadcast from the reference clock node to the different sensor nodes; the sensor network time synchronization protocol (TPSN) is to send independent time synchronization packets from the reference node to different sensor nodes, and estimate the clock offset of the sensor nodes according to the response packets. However, the above-mentioned time estimation of the reference broadcast synchronization mechanism is affected by the receiving time and the processing mechanism of the sensor node, and the sensor network time synchronization protocol cannot completely eliminate the influence of the sending time, the access time, the receiving time, etc., and these links are affected by the network environment, the program logic, etc., so as to affect the accuracy of the time estimation. In addition, the above schemes often have high dependence on sensor implementation, and sensor logic needs to implement a relevant synchronization protocol.
Disclosure of Invention
The invention aims to solve the technical problems of insufficient time synchronization precision and high sensor dependence degree of a sensor network in a body area network, and provides a body area network sensor synchronization method, a body area network sensor synchronization system and wearable biosensor equipment.
The technical solution for solving the above technical problems is to provide a body area network sensor synchronization method, where the body area network includes a plurality of wearable biosensor devices and a synchronization service terminal, each of the wearable biosensor devices includes a main sensor unit and a synchronization signal processing unit electrically connected to the main sensor unit through a wire, and the synchronization signal processing units of the plurality of wearable biosensor devices adopt the same hardware and the same protocol stack, and the method includes:
the synchronous service terminal sends a wireless synchronous signal in a broadcasting mode;
the synchronization signal processing unit of the wearable biosensor device receives the wireless synchronization signal and sends a wired synchronization signal to the connected main sensor unit according to the received wireless synchronization signal;
the main sensor unit of the wearable biosensor device adjusts the synchronization mark in the uploaded human vital sign parameters according to the wired synchronization signal received from the synchronization signal processing unit.
Preferably, the method further comprises:
when a main sensor unit of the wearable biosensor device meets preset conditions, sending an enabling signal to a connected synchronous signal processing unit;
the synchronization signal processing unit of the wearable biosensor device enters a working state when receiving the enabling signal, and the synchronization signal processing unit only receives the wireless synchronization signal and transmits a wired synchronization signal in the working state.
Preferably, the method further comprises:
the synchronous signal processing unit of the wearable biosensor device switches the dormant state and the working state according to a preset time interval, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits the wired synchronous signal in the working state.
Preferably, the body area network further comprises a data processing terminal, and the method comprises the following steps:
the data processing terminal receives human vital sign parameters uploaded by main sensor units of a plurality of wearable biological sensor devices;
the data processing terminal judges whether the human body vital sign parameters uploaded by the main sensor units of the wearable biological sensor devices are complete or not, and maps all the human body vital sign parameters into the same time coordinate according to the synchronous marks in the human body vital sign parameters when confirming that the human body vital sign parameters are complete.
The invention also provides a body area network sensor synchronization system, which comprises a synchronization service terminal and a plurality of wearable biological sensor devices, wherein each wearable biological sensor device comprises a main sensor unit and a synchronization signal processing unit electrically connected with the main sensor unit through a wire, and the synchronization signal processing units of the plurality of wearable biological sensor devices adopt the same hardware and the same protocol stack; wherein:
the synchronous service terminal is used for sending a wireless synchronous signal in a broadcasting mode;
the synchronous signal processing unit is used for receiving the wireless synchronous signal and sending a wired synchronous signal to the connected main sensor unit according to the received wireless synchronous signal;
the main sensor unit is used for generating and uploading human vital sign parameters, and the main sensor unit adjusts the synchronous marks in the human vital sign parameters according to the wired synchronous signals received from the synchronous signal processing unit.
Preferably, the main sensor unit includes an enable signal output end, the synchronization signal processing unit includes an enable receiving end, and the enable signal output end of the main sensor unit is connected with the enable receiving end of the synchronization signal processing unit in a wired manner;
when the main sensor unit meets preset conditions, an enabling signal is output through an enabling signal output end, an enabling receiving end of the synchronous signal processing unit enters a working state when receiving the enabling signal, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits a wired synchronous signal in the working state.
Preferably, the synchronization signal processing unit includes a timer, the synchronization signal processing unit switches between a sleep state and an operating state according to a timing time of the timer, and the synchronization signal processing unit receives the wireless synchronization signal and transmits the wired synchronization signal only in the operating state.
The invention also provides wearable biosensor equipment, which comprises a main sensor unit and a synchronous signal processing unit, wherein the synchronous signal processing unit is electrically connected with the main sensor unit through a wire; wherein:
the synchronous signal processing unit is used for receiving a wireless synchronous signal and sending a wired synchronous signal to the connected main sensor unit according to the received wireless synchronous signal;
the main sensor unit is used for generating and uploading human vital sign parameters, and the main sensor unit adjusts the synchronous marks in the human vital sign parameters according to the wired synchronous signals received from the synchronous signal processing unit.
Preferably, the main sensor unit includes an enable signal output end, the synchronization signal processing unit includes an enable receiving end, and the enable signal output end of the main sensor unit is connected with the enable receiving end of the synchronization signal processing unit in a wired manner;
when the main sensor unit meets preset conditions, an enabling signal is output through an enabling signal output end, an enabling receiving end of the synchronous signal processing unit enters a working state when receiving the enabling signal, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits a wired synchronous signal in the working state.
Preferably, the synchronization signal processing unit includes a timer, the synchronization signal processing unit switches between a sleep state and an operating state according to a timing time of the timer, and the synchronization signal processing unit receives the wireless synchronization signal and transmits the wired synchronization signal only in the operating state.
According to the body area network sensor synchronization method, the body area network sensor synchronization system and the wearable biological sensor device, the receiving and processing logic of the time synchronization protocol is integrated into the single module, so that time estimation errors caused by the receiving time and the processing mechanism of the wireless synchronization signal can be reduced, the accuracy requirement of a sampling clock of a main sensor unit in the wearable biological sensor device is reduced, and the design dependence on the main sensor unit is small.
Drawings
FIG. 1 is a schematic diagram of a prior wearable human vital sign parameter monitoring;
fig. 2 is a schematic flow chart of a body area network sensor synchronization method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a wake-up synchronization signal processing unit in a body area network sensor synchronization method according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a data processing terminal processing vital sign parameters of a human body in a body area network sensor synchronization method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a body area network sensor synchronization system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention is applicable to a body area network comprising a plurality of wearable biosensor devices and a synchronization service terminal, wherein the synchronization service terminal may be a separate device with a radio frequency signal emitting unit, e.g. the synchronization service terminal may be integrated into one of the wearable biosensor devices. Each wearable biosensor device is wearable to a human body and comprises a main sensor unit and a synchronization signal processing unit, wherein the main sensor unit is used for detecting vital sign parameters of the human body, such as pulse, blood pressure, body temperature, blood oxygen, respiration and the like, which can specifically comprise an MCU (Micro Control Unit ); the synchronization signal receiving unit is configured to receive a wireless synchronization signal, and may include, for example, an electronic component configured to receive a radio frequency signal.
In the embodiment of the invention, the main sensor unit and the synchronous signal processing unit of the same wearable biological sensor device are electrically connected through a wire, namely the main sensor unit and the synchronous signal processing unit are connected in a wired mode, and the synchronous signal unit can send signals to the main sensor unit in a pulse wave, high-low level mode and the like. And in order to ensure the accuracy of synchronization, the synchronization signal processing units of the wearable biological sensor devices in the body area network adopt the same hardware and the same protocol stack.
Fig. 2 is a schematic diagram of a body area network sensor synchronization method according to an embodiment of the present invention, where the method is used to implement time synchronization of signals between a plurality of wearable biosensor devices in a body area network. Specifically, the method of the present embodiment includes:
step S21: the synchronous service terminal transmits a wireless synchronous signal in a broadcasting mode, and the wireless synchronous signal can be transmitted in a radio frequency mode.
Since the estimation of the time at which each wearable biosensor device acquires (i.e. samples) a human vital sign parameter depends on the accuracy of the sampling rate, which is affected by the sampling clock, the actual sampling frequency of each wearable biosensor device may deviate from the design sampling frequency and the deviation may drift with changes in external environmental factors such as temperature. Thus, for human vital sign parameters from different individual wearable biosensor devices, if the sample time is estimated according to the design frequency, the sample time may be wrong and gradually accumulated due to the sampling rate error, so that even if the synchronization of the multi-sensor signals is achieved at a certain point in time, the synchronization is gradually lost. In a specific implementation, the synchronization service terminal may send the wireless synchronization signal every other time, for example, continuously send the wireless synchronization signal with a preset period, so as to perform timing calibration on each wearable biosensor device.
Step S22: the synchronization signal processing unit of the wearable biosensor device receives the wireless synchronization signal and transmits a wired synchronization signal to the connected main sensor unit according to the received wireless synchronization signal.
In particular the above-mentioned wired synchronization signal may be transmitted to the main sensor unit by means of a pulse signal or a high/low level.
Step S23: the main sensor unit of the wearable biosensor device adjusts the synchronization mark in the uploaded human vital sign parameters according to the wired synchronization signal received from the synchronization signal processing unit. Furthermore, the above mentioned vital sign parameters of the human body may also comprise a position marker of the wearable biosensor device, which, of course, may in practical applications also be realized by the ID of the wearable biosensor device (or the main sensor unit).
According to the characteristics of wireless signal transmission, the delay in the channel can be decomposed into 4 different parts, namely a sending time, an access time, a propagation time and a receiving time, and the traditional RBS scheme basically eliminates the delay caused by the first three parts. However, the delay of the receiving time part is affected by many factors such as the protocol stack, the protocol processing MCU, the workload of the sensor MCU, etc., and the conventional RBS scheme still cannot solve.
According to the body area network sensor synchronization method, the protocol processing part of the wireless synchronization signal is separated into independent hardware, so that each wearable biological sensor device is consistent and exclusive in software and hardware in the wireless synchronization signal receiving processing process (because the synchronization signal processing units of each wearable sensor device adopt the same hardware and the same protocol stack), and errors caused by delay differences of the wireless synchronization signal in the signal receiving stage are eliminated. Meanwhile, the processing logic of the wireless synchronous signal does not need to be added in the main sensor unit, namely, corresponding program codes and error correction logic do not need to be developed and designed for different main sensor units, and the development and design of the main sensor unit are simplified.
Specifically, the synchronization process of the wearable biosensor device may be divided into two periods, the first period being a time (T1) from when the synchronization service terminal transmits a wireless synchronization message to the synchronization signal processing unit of each wearable biosensor device to a time (T2) when the synchronization signal processing unit generates a wired synchronization signal, and the second period being a time (T3) from a time (T2) when the synchronization signal processing unit generates a wired synchronization signal to a time (T3) when the main sensor unit enters the synchronization signal processing process (typically by interrupting a subroutine), the total time Ttotal of which satisfies the following calculation formula:
Ttotal=(T2-T1)+(T3-T2)（1）
for RBS schemes, T1 is the same for all wearable biosensor devices participating in synchronization, thus having no impact on synchronization errors; the difference of T2 values of different synchronous service terminals is us-level (the actual measurement is less than 1 us) for the same broadcast synchronous signal; while T2-T3 generally depends on the time to enter the interrupt process, taking an AT80C51 chip as an example, a maximum of 8 machine cycles are required to enter the external interrupt process, even AT 32K clock frequency, T3-T2 should be less than 300us, for a common single chip application environment for medical continuous signal acquisition, the clock frequency is higher, and can generally respond within a few us, so that T2-T3 is also us-level. The body area network sensor synchronization method of the embodiment can realize high-precision and reliable time synchronization and can support the time synchronization of signals with higher sampling rates.
In order to reduce the response time and response error of the synchronization signal processing unit, the synchronization signal processing unit needs to be in a high response state, thereby causing an increase in power consumption, and in order to reduce the power consumption of the synchronization signal processing unit, in another embodiment of the present invention, each wearable biosensor device further includes a timer (which may be integrated into the main sensor unit), and accordingly, as shown in fig. 3, the body area network sensor synchronization method further includes, in addition to the steps S21 to S23, the steps of:
step S31: the timer of the main sensor unit of the wearable biosensor device counts time.
Step S32: the main sensor unit judges whether the preset condition is met according to the timing duration of the timer, and when the timing duration judges that the preset condition is met, the main sensor unit executes step S33, otherwise, the main sensor unit returns to step S31 to continue timing.
Step S33: the main sensor unit transmits an enable signal (wired mode) to the connected synchronization signal processing unit, clears the timer and restarts the timer, and then performs step S31 and step S34.
Step S34: the synchronization signal processing unit of the wearable biosensor device enters an operating state upon receiving the enabling signal. The synchronization signal processing unit receives the wireless synchronization signal and transmits the wired synchronization signal only in the operating state (in step S22, the synchronization signal processing unit enters the sleep state after transmitting the wired synchronization signal to the main sensor unit).
By the mode, the synchronous signal processing unit can only work in a limited synchronous time window, and the rest time enters a dormant state, so that the energy consumption is reduced, and the requirement of low power consumption of a body area network is met. In particular, the timer may be corrected according to the wired synchronization signal from the synchronization signal processing unit, for example, the timer may be cleared, i.e., cleared twice, when the wired synchronization signal is received. In practical applications, the main sensor unit may also send an enable signal to the connected synchronization signal processing unit when receiving a signal from the host computer.
In addition, the timer may be integrated into the synchronization signal processing unit, and accordingly, the synchronization signal processing unit may switch the sleep state and the operation state at preset time intervals (the time intervals may be set as needed, and the time intervals for switching the sleep state to the operation state are different from the time intervals for switching the operation state to the sleep state), and the synchronization signal processing unit may receive the wireless synchronization signal and transmit the wired synchronization signal only in the operation state.
In still another embodiment of the present invention, the body area network further includes a data processing terminal (the data processing terminal may be an upper computer, for example, a mobile phone with a specific application installed thereon, etc.), and accordingly, as shown in fig. 4, the body area network sensor synchronization method further includes, in addition to the steps S21 to S23:
step S41: the data processing terminal receives the human vital sign parameters uploaded by the main sensor units of all the wearable biosensor devices (by wireless means).
In this step, the data processing terminal also needs to cut the human vital sign parameters into data segments delimited by the synchronization signals according to the synchronization marks and the position marks contained in the human vital sign parameters.
Step S42: the data processing terminal judges whether the human vital sign parameters uploaded by the main sensor units of the wearable biological sensor devices are complete, and when the human vital sign parameters are confirmed to be complete, the step S44 is executed, otherwise, the step S43 is executed.
Since the synchronization signal processing unit of a part of the wearable biosensor device may not receive the wireless synchronization signal for some reason on the synchronization link during the synchronization of the respective wearable biosensor device, the data processing terminal needs to make a judgment about the situation, that is, only when all the wearable biosensor devices participating in the synchronization upload the vital sign parameters of the human body containing the synchronization mark and the health data of the human body are located in one time window (for example, 2s, the time interval required for the synchronization service terminal to transmit the wireless synchronization signal is far smaller). In addition, an increasing sequence number can be added in the wireless synchronization information sent by the synchronization service terminal, the sequence number is simultaneously transmitted to the main sensor unit in the wired synchronization signal sent by the synchronization signal processing module, and the human vital sign parameters are sent to the data processing terminal through the main sensor unit, so that the data processing terminal can determine the synchronization time points of different human vital sign parameters.
Step S43: error handling. Specifically, the data processing terminal may report errors or directly ignore corresponding human vital sign parameters.
Step S44: all the human vital sign parameters are mapped into the same time coordinate according to the synchronous marks in the human vital sign parameters, so that comprehensive judgment of the human health state is convenient to be used as a reference.
Specifically, assuming that there are two main sensor units of the wearable biosensor device, that is, a main sensor unit a and a main sensor unit B, the human vital sign parameters are uploaded, the time coordinates of the main sensor unit a may be selected for reference (generally, the signal of the main sensor unit a with the highest sampling rate or the highest clock precision is selected), and between adjacent synchronization signals, the received human vital sign parameters uploaded by the two main sensor units are na and nb, where na and nb are positive integers respectively.
For na person vital sign parameters sent by the main sensor unit a in the sync mark segment, the estimated time Ta [ i ] of the ith person vital sign parameter with respect to the sync mark satisfies:
Ta[i]=Pa×i（2）
where i=0, …, na, pa is the design sampling period of the main sensor unit a (e.g. the design sampling frequency is 100Hz, pa=0.01 s).
For nb human body vital sign parameters sent by the main sensor unit B in the sync mark segment, the estimated time Tb [ j ] of the jth human body vital sign parameter with respect to the sync mark satisfies:
Tb[j]=Pa×j ×na/nb（3）
where j=0, …, nb, pa is the design sampling period of the main sensor unit a.
As shown in fig. 5, the embodiment of the present invention further provides a body area network sensor synchronization system, which is applicable to a body area network, and includes a synchronization service terminal 51 and a plurality of wearable biological sensor devices 52, and each of the wearable biological sensor devices 52 includes a main sensor unit 521 and a synchronization signal processing unit 522, and in each of the wearable biological sensor devices 52, the main sensor unit 521 and the synchronization signal processing unit 522 are electrically connected through a wire. The synchronization signal processing units 521 of the plurality of wearable biosensor apparatuses 52 described above employ the same hardware and the same protocol stack.
The synchronization service terminal 51 includes a wireless signal transmitting unit, and transmits a wireless synchronization signal in a broadcasting manner through the wireless signal transmitting unit; the synchronization signal processing unit 521 is configured to receive a wireless synchronization signal, and send a wired synchronization signal to the connected main sensor unit according to the received wireless synchronization signal; the main sensor unit 522 is configured to generate and upload a vital sign parameter of a human body, and the main sensor unit 522 adjusts a synchronization mark in the vital sign parameter of the human body according to the wired synchronization signal received from the synchronization signal processing unit 521. The main sensor unit 522 may wirelessly upload the vital sign parameters of the human body to the host computer.
In one embodiment of the present invention, the main sensor unit 522 may include an enable signal output terminal, and accordingly, the synchronization signal processing unit 521 includes an enable receiving terminal, and the enable signal output terminal of the main sensor unit 522 is connected to the enable receiving terminal of the synchronization signal processing unit 521 in a wired manner; when the main sensor unit 522 meets the preset condition, the enable signal is output through the enable signal output terminal, the enable receiving end of the synchronous signal processing unit 521 enters the working state when receiving the enable signal, and the synchronous signal processing unit 521 only receives the wireless synchronous signal and transmits the wired synchronous signal in the working state. By the above way, the energy consumption of the synchronous signal processing unit 521 can be reduced while the response time and the response error of the synchronous signal processing unit 521 are ensured, and the low energy consumption requirement of the wearable biosensor device is met.
Specifically, each of the wearable biological sensor devices 22 includes a timer (which may be integrated into the main sensor unit 222), and the enable signal output terminal of the main sensor unit 222 outputs an enable signal according to the counting time of the timer (i.e., the preset counting time is reached), i.e., the main sensor unit 222 confirms that the preset condition is satisfied when the timer reaches the preset counting time. In particular, the timer may be corrected according to the wired synchronization signal from the synchronization signal processing unit, for example, the timer may be cleared when the wired synchronization signal is received (or cleared after a preset timing time is reached).
In addition, the main sensor unit 222 is integrated with a signal receiving circuit (e.g. a bluetooth signal receiving circuit), and the main sensor unit 222 outputs an enable signal through an enable signal output terminal when the signal receiving circuit receives a wake-up signal of the host computer, that is, the main sensor unit 222 confirms that the preset condition is satisfied when receiving the wake-up signal. In particular, the upper computer may cause the synchronization signal processing unit 221 to transmit the wireless synchronization signal within a preset time after transmitting the wake-up signal.
In practical applications, a timer may be built in the synchronization signal processing unit 521, the synchronization signal processing unit 521 may switch between a sleep state and an operating state according to a timing of the timer, and the synchronization signal processing unit 521 may only receive a wireless synchronization signal and transmit a wired synchronization signal in the operating state. The structure can also meet the requirements of response time, response error and low energy consumption.
The body area network sensor synchronization system in this embodiment belongs to the same concept as the body area network sensor synchronization method in the corresponding embodiments of fig. 1-4, the specific implementation process is detailed in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in the system embodiment, and are not repeated here.
The embodiment of the invention also provides a wearable biosensor device, which comprises a main sensor unit and a synchronous signal processing unit, wherein the synchronous signal processing unit is electrically connected with the main sensor unit through a wire; wherein: the synchronous signal processing unit is used for receiving the wireless synchronous signal and sending a wired synchronous signal to the connected main sensor unit according to the received wireless synchronous signal; the main sensor unit is used for generating and uploading human vital sign parameters, and adjusts synchronous marks in the human vital sign parameters according to the wired synchronous signals received from the synchronous signal processing unit.
In an embodiment of the wearable biosensor device, the main sensor unit includes an enable signal output end, the synchronization signal processing unit includes an enable receiving end, and the enable signal output end of the main sensor unit is connected with the enable receiving end of the synchronization signal processing unit in a wired manner; when the main sensor unit meets the preset condition, the enabling signal output end outputs the enabling signal, the enabling receiving end of the synchronous signal processing unit enters the working state when receiving the enabling signal, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits the wired synchronous signal in the working state.
In another embodiment of the wearable biosensor apparatus, the synchronization signal processing unit includes a timer, the synchronization signal processing unit switches the sleep state and the operating state according to a timing time of the timer, and the synchronization signal processing unit receives the wireless synchronization signal and transmits the wired synchronization signal only in the operating state.
The wearable biosensor apparatus in this embodiment belongs to the same concept as the body area network sensor synchronization method in the corresponding embodiments of fig. 1-4, the specific implementation process is detailed in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in the apparatus embodiment, which is not repeated here.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional units and modules according to needs. The functional units and modules in the embodiment may be integrated in one processor, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed body area network sensor synchronization method, system and wearable biosensor device may be implemented in other manners. For example, the body area network sensor synchronization system embodiments described above are merely illustrative.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A body area network sensor synchronization method, wherein the body area network includes a plurality of wearable biological sensor devices and a synchronization service terminal, each of the wearable biological sensor devices includes a main sensor unit and a synchronization signal processing unit electrically connected to the main sensor unit through a wire, and the synchronization signal processing units of the plurality of wearable biological sensor devices employ the same hardware and the same protocol stack, the method comprising:
the synchronous service terminal sends a wireless synchronous signal in a broadcasting mode;
the synchronization signal processing unit of the wearable biosensor device receives the wireless synchronization signal and sends a wired synchronization signal to the connected main sensor unit according to the received wireless synchronization signal;
the main sensor unit of the wearable biosensor device adjusts the synchronization mark in the uploaded human vital sign parameters according to the wired synchronization signal received from the synchronization signal processing unit.
2. The body area network sensor synchronization method of claim 1, further comprising:
when a main sensor unit of the wearable biosensor device meets preset conditions, sending an enabling signal to a connected synchronous signal processing unit;
the synchronization signal processing unit of the wearable biosensor device enters a working state when receiving the enabling signal, and the synchronization signal processing unit only receives the wireless synchronization signal and transmits a wired synchronization signal in the working state.
3. The body area network sensor synchronization method of claim 1, further comprising:
the synchronous signal processing unit of the wearable biosensor device switches the dormant state and the working state according to a preset time interval, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits the wired synchronous signal in the working state.
4. The body area network sensor synchronization method of claim 1, wherein the body area network further comprises a data processing terminal, the method comprising:
the data processing terminal receives human vital sign parameters uploaded by main sensor units of a plurality of wearable biological sensor devices;
the data processing terminal judges whether the human body vital sign parameters uploaded by the main sensor units of the wearable biological sensor devices are complete or not, and maps all the human body vital sign parameters into the same time coordinate according to the synchronous marks in the human body vital sign parameters when confirming that the human body vital sign parameters are complete.
5. The body area network sensor synchronization system is characterized by comprising a synchronization service terminal and a plurality of wearable biological sensor devices, wherein each wearable biological sensor device comprises a main sensor unit and a synchronization signal processing unit electrically connected with the main sensor unit through a wire, and the synchronization signal processing units of the plurality of wearable biological sensor devices adopt the same hardware and the same protocol stack; wherein:
the synchronous service terminal is used for sending a wireless synchronous signal in a broadcasting mode;
the synchronous signal processing unit is used for receiving the wireless synchronous signal and sending a wired synchronous signal to the connected main sensor unit according to the received wireless synchronous signal;
the main sensor unit is used for generating and uploading human vital sign parameters, and the main sensor unit adjusts the synchronous marks in the human vital sign parameters according to the wired synchronous signals received from the synchronous signal processing unit.
6. The body area network sensor synchronization system of claim 5, wherein the main sensor unit includes an enable signal output end, the synchronization signal processing unit includes an enable receiving end, and the enable signal output end of the main sensor unit is connected with the enable receiving end of the synchronization signal processing unit in a wired manner;
when the main sensor unit meets preset conditions, an enabling signal is output through an enabling signal output end, an enabling receiving end of the synchronous signal processing unit enters a working state when receiving the enabling signal, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits a wired synchronous signal in the working state.
7. The body area network sensor synchronization system of claim 5, wherein the synchronization signal processing unit includes a timer, the synchronization signal processing unit switches a sleep state and an operating state according to a timing time of the timer, and the synchronization signal processing unit receives the wireless synchronization signal and transmits a wired synchronization signal only in the operating state.
8. The body area network sensor synchronization system comprises a synchronization service terminal and a plurality of wearable biological sensor devices, wherein each wearable biological sensor device comprises a main sensor unit and a synchronization signal processing unit, the synchronization signal processing units are electrically connected with the main sensor unit through wires, and the synchronization signal processing units of the plurality of wearable biological sensor devices adopt the same hardware and the same protocol stack; wherein:
the synchronous signal processing unit is used for receiving a wireless synchronous signal sent by the synchronous service terminal in a broadcast mode and sending a wired synchronous signal to the connected main sensor unit according to the received wireless synchronous signal;
the main sensor unit is used for generating and uploading human vital sign parameters, and the main sensor unit adjusts the synchronous marks in the human vital sign parameters according to the wired synchronous signals received from the synchronous signal processing unit.
9. The wearable biosensor device of claim 8, wherein the main sensor unit comprises an enable signal output, the synchronization signal processing unit comprises an enable receiving end, and the enable signal output of the main sensor unit is connected with the enable receiving end of the synchronization signal processing unit in a wired manner;
when the main sensor unit meets preset conditions, an enabling signal is output through an enabling signal output end, an enabling receiving end of the synchronous signal processing unit enters a working state when receiving the enabling signal, and the synchronous signal processing unit only receives the wireless synchronous signal and transmits a wired synchronous signal in the working state.
10. The wearable biosensor apparatus of claim 8, wherein the synchronization signal processing unit comprises a timer, the synchronization signal processing unit switches a sleep state and an operating state according to a timing time of the timer, and the synchronization signal processing unit receives the wireless synchronization signal and transmits a wired synchronization signal only in the operating state.
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| EP4238489A4 (en) * | 2021-01-29 | 2024-06-12 | Samsung Electronics Co., Ltd. | Electronic device and method for synchronizing times of different data records |
| CN115281653A (en) * | 2022-06-29 | 2022-11-04 | 北京航天时代光电科技有限公司 | Wearable gait measurement system |
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