CN108245132A - A kind of medical wearable device intelligent interactive method based on bluetooth - Google Patents
A kind of medical wearable device intelligent interactive method based on bluetooth Download PDFInfo
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- CN108245132A CN108245132A CN201810036961.6A CN201810036961A CN108245132A CN 108245132 A CN108245132 A CN 108245132A CN 201810036961 A CN201810036961 A CN 201810036961A CN 108245132 A CN108245132 A CN 108245132A
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- care facility
- custodial care
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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
- A61B5/002—Monitoring the patient using a local or closed circuit, e.g. in a room or building
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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
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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
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Abstract
The invention discloses a kind of medical wearable device intelligent interactive methods based on bluetooth, and the bluetooth connection logic of intelligent terminal and custodial care facility is improved；Whether connection custodial care facility is needed by the distance of custodial care facility and movement locus automatic discrimination on intelligent terminal.In equipment connection procedure, equipment identities are identified by authentication mechanism, for identifying that successful equipment realizes automatic connection.When equipment connection quantity reaches the upper limit, unwanted equipment connection is disconnected automatically, then connects new equipment automatically.The old connection disconnected, which is placed to, to be hung up in list of devices, and patient can carry out equipment at any time and be switched fast, and reconnect old connection.Whether intelligent terminal can need to connect custodial care facility according to the movement locus automatic decision of custodial care facility in the present invention.The connection of custodial care facility can automatically complete, and user is avoided to carry out complicated operation, improve joint efficiency, optimize user experience.
Description
Technical field
The invention belongs to medical treatment interaction field more particularly to a kind of medical wearable device intelligent interaction sides based on bluetooth
Method.
Background technology
With the continuous improvement of software and level of hardware, more and more portable patient monitor equipment move towards average family.Such as
Portable blood pressure detection device, portable cardiac detection device, motion detection device etc..These portable devices have volume
The characteristics of small, low in energy consumption, and mostly using smart mobile phone or tablet computer etc. as data basestation, pass through these smart machines
On bluetooth module be attached with data sampling sensor.Although carry out data transmission effectively reducing by bluetooth approach
Detection device volume increases the portability of equipment, but as the quantity of custodial care facility that bluetooth is used to communicate constantly carries
Height needs bluetooth connection mode and management mode to custodial care facility to be improved, such as under the scene of more custodial care facilities, Ying
Ensure to simplify the flow that equipment connects as possible under the premise of connection safety, body is interacted so as to improve equipment joint efficiency and patient
It tests.
Need patient that custodial care facility and intelligent terminal are placed in certain distance in existing equipment connection management, then
Bluetooth operation is carried out by intelligent terminal, carries out the pairing and attended operation of bluetooth equipment manually.For there is multiple custodial care facilities
Scene, patient not only needs to connect multiple equipment manually, but also when equipment connection quantity reaches the upper limit, needs patient manual
New equipment is reconnected after disconnecting unwanted equipment connection.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of medical wearable device intelligence based on bluetooth
Energy exchange method, is improved the bluetooth connection logic of intelligent terminal and custodial care facility；It is set on intelligent terminal by monitoring
Whether standby distance and movement locus automatic discrimination needs to connect custodial care facility.In equipment connection procedure, pass through authentication mechanism
Equipment identities are identified, for identifying that successful equipment realizes automatic connection.When equipment connection quantity reaches the upper limit, from
Dynamic circuit breaker opens unwanted equipment connection, then connects new equipment automatically.The old connection disconnected, which is placed to, to be hung up in list of devices,
Patient can carry out equipment at any time and be switched fast, and reconnect old connection.
The purpose of the present invention is achieved through the following technical solutions：A kind of medical wearable device intelligence based on bluetooth
Energy exchange method, this method comprises the following steps：
(1) broadcast oneself state after custodial care facility is ready, guarantee can be scanned by intelligent terminal and be arrived；
(2) intelligent terminal is scanned neighbouring custodial care facility on backstage, when scanning is to custodial care facility, is set according to monitoring
Standby RSSI value calculates the distance of the custodial care facility and intelligent terminal, and the movement locus of the custodial care facility is obtained according to distance value,
So as to judge the custodial care facility whether close to oneself；If intelligent terminal find the custodial care facility close to oneself, actively
Authentication request is sent to the custodial care facility, step (3) is performed, does not otherwise do interaction process；
(3) after custodial care facility receives the authentication request of intelligent terminal transmission, if after being verified, with intelligent end
Connection is established at end, if authentication failed, error message is sent to intelligent terminal.
Further, in the step (2), its distance and movement rail are judged by the bluetooth signal intensity of custodial care facility
Mark, it is specific as follows：
After intelligent terminal is scanned to neighbouring custodial care facility, intelligent terminal can obtain the title of the custodial care facility
Name, device number id and RSSI value information；Distance d of the custodial care facility apart from intelligent terminal, calculating side are calculated according to RSSI value
Method is as follows：
Wherein, RSSI is custodial care facility signal strength；A is custodial care facility when intelligent terminal and custodial care facility are separated by 1 meter
Signal strength；N is the environmental attenuation factor；By continuously recording the distance d of custodial care facility, can obtain one group it is related to time t
Distance D；Fitting a straight line is carried out to D by least square method and obtains movement locus of the custodial care facility relative to intelligent terminal；If
Treat that fitting a straight line is：D=a+bt；Wherein, a represents intercept, and b represents slope；
For the N group data (t obtained by same time interval measurementi, di), i=1,2 ..., N use Least Square Method
During parameter, it is desirable that observation diThe weighted sum of squares of deviation be minimum, i.e. the value of following formula is minimum：
Upper examination asks local derviation to obtain a, b respectively：
Equation group is obtained after arrangement：
The best estimate of parameter a and parameter b are obtained after solving above-mentioned equation：
From the value of parameter b acquire custodial care facility relative to intelligent terminal be far from or close：If b>0, then it supervises
Equipment is protected far from intelligent terminal；If b<0, then custodial care facility is close to intelligent terminal.
Further, in the step (3), intelligent terminal includes use into the authentication request that custodial care facility is sent
The Token values of JWT (JSON Web Tokens) standard, are denoted as Toke_a, which includes three parts：header、
Payload, signature are often split with point between part, are encoded by Base64；Custodial care facility is according to Toke_
A verifies intelligent terminal identity, and after being verified, custodial care facility sends Token_b to intelligent terminal, and intelligent terminal passes through Token_
B verifies custodial care facility identity, and both sides' authentication is established by the way that rear connection is formal.
Further, intelligent terminal can connect any number of custodial care facility, specially：When new custodial care facility connects
When, whether the custodial care facility quantity that intelligent terminal detection currently connects is more than that bluetooth connection limits, if more than limitation, is passed through
Lru algorithm is selected Geju City connection from the list of devices currently connected and is hung up, and then connects new custodial care facility；That selects is old
It connects corresponding custodial care facility to be placed in the list of devices of hang-up, if it is desirable, patient can be at any time from the equipment of hang-up
Restore connection in list.
Further, Geju City connection is selected from the custodial care facility list currently connected by lru algorithm to hang up, specifically
For：Connected device list with chain sheet form is stored, is denoted as chained list L；For each custodial care facility connected, intelligence
Terminal preserves the access time t to the custodial care facility in chained list L；According to the access time t of each custodial care facility to chained list L into
Row sequence；If there is new custodial care facility to need to connect, the information of the custodial care facility is stored in the head of chained list, and according to chain
The custodial care facility information of table tail portion storage hangs up corresponding custodial care facility；If the custodial care facility being present in chained list L is by again
The information corresponding with accessed custodial care facility stored in L is then stored to chained list head, and updates the corresponding time by secondary access
t。
The beneficial effects of the invention are as follows：
1. whether intelligent terminal can need to connect custodial care facility according to the movement locus automatic decision of custodial care facility.Monitoring
The connection of equipment can automatically complete, and user is avoided to carry out complicated operation, improve joint efficiency, and optimization user uses body
It tests.
2. verify equipment identities using Token authentication mechanisms in equipment connection procedure, can effectively prevent pair to set
Standby unauthorized access.
3. for the scene of more custodial care facilities, the present invention passes through lru algorithm when custodial care facility connection quantity is more than limitation
It picks out rarely needed custodial care facility to disconnect, and then reduces the probability that custodial care facility frequently cuts off and reconnects, greatly
The big efficiency for improving equipment management.
Description of the drawings
Fig. 1 is the method for the present invention overall flow schematic diagram；
Fig. 2 is movement locus decision flow chart；
Fig. 3 is authentication flow chart；
Fig. 4 is equipment connection status flow path switch figure；
Fig. 5 is lru algorithm schematic diagram.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Medical wearable device intelligent interactive method provided by the invention based on bluetooth, as shown in Figure 1, including following step
Suddenly：
(1) broadcast oneself state after custodial care facility is ready, guarantee can be scanned by intelligent terminal and be arrived；
(2) intelligent terminal is scanned neighbouring custodial care facility on backstage, when scanning is to custodial care facility, is set according to monitoring
Standby RSSI value calculates the distance of the custodial care facility and intelligent terminal, and the movement locus of the custodial care facility is obtained according to distance value,
So as to judge the custodial care facility whether close to oneself；If intelligent terminal find the custodial care facility close to oneself, actively
Authentication request is sent to the custodial care facility, step (3) is performed, does not otherwise do interaction process；
Its distance and movement locus can be judged by the bluetooth signal intensity of custodial care facility, as shown in Fig. 2, specific as follows：
By taking Cross-border congestion management technology as an example, after intelligent terminal is scanned to neighbouring custodial care facility, intelligent terminal can obtain
Title name, device number id and the RSSI value information of the custodial care facility are obtained, it is as follows：
Distance d of the custodial care facility apart from intelligent terminal is calculated according to RSSI value, computational methods are as follows：
Wherein, RSSI is custodial care facility signal strength；A is custodial care facility when intelligent terminal and custodial care facility are separated by 1 meter
Signal strength；N is the environmental attenuation factor, parameter A values 59 in the present embodiment, parameter n values 2.0；By continuously recording monitoring
The distance d of equipment can obtain one group and the relevant distance D of time t；Fitting a straight line is carried out by least square method to D to obtain
Custodial care facility relative to intelligent terminal movement locus；If treat that fitting a straight line is：D=a+bt；Wherein, a represents intercept, and b is represented
Slope；
For N (can the value 20) group data (t obtained by same time interval measurementi, di), i=1,2 ..., N, with minimum
When square law estimates parameter, it is desirable that observation diThe weighted sum of squares of deviation be minimum, i.e. the value of following formula is minimum：
Upper examination asks local derviation to obtain a, b respectively：
Equation group is obtained after arrangement：
The best estimate of parameter a and parameter b are obtained after solving above-mentioned equation：
From the value of parameter b acquire custodial care facility relative to intelligent terminal be far from or close：If b>0, then it supervises
Equipment is protected far from intelligent terminal；If b<0, then custodial care facility is close to intelligent terminal.
(3) after custodial care facility receives the authentication request of intelligent terminal transmission, if after being verified, with intelligent end
Connection is established at end, if authentication failed, error message is sent to intelligent terminal；
Intelligent terminal is included into the authentication request that custodial care facility is sent and is marked using JWT (JSON Web Tokens)
Accurate Token values, are denoted as Toke_a, which includes three parts：Header, payload, signature, per part
Between with point be split, encoded by Base64；Custodial care facility verifies intelligent terminal identity according to Toke_a, is verified
Afterwards, custodial care facility sends Token_b to intelligent terminal, and intelligent terminal verifies custodial care facility identity, both sides' identity by Token_b
Verification is established by the way that rear connection is formal, and above process flow chart is as shown in Figure 3.One example of Token values is as follows：
Intelligent terminal can connect any number of custodial care facility, when new custodial care facility connection, intelligent terminal detection
Whether the custodial care facility quantity currently connected limits more than bluetooth connection, if more than limitation, is connected by lru algorithm from current
List of devices in select a Geju City connection hang up, then connect new custodial care facility, as shown in Figure 4；The old connection pair selected
The custodial care facility answered is placed in the list of devices of hang-up, if it is desirable, patient can be at any time from the list of devices of hang-up
Restore connection.
Geju City connection is selected by lru algorithm from the custodial care facility list currently connected to hang up, as shown in figure 5, tool
Body is：Connected device list with chain sheet form is stored, is denoted as chained list L, form is as shown below：
Wherein L [i] is a custodial care facility connected.For each custodial care facility connected, intelligent terminal exists
Chained list L
The middle access time t preserved to the custodial care facility, i.e. L [i] store the access time t of custodial care facility；According to every
The access time t of a custodial care facility is ranked up chained list L；I.e.：
| L[0].t>L[1].t>L[2].t>L[3].t>L[4].t>L[5].t>L[6].t |
If there is new custodial care facility to need to connect, the information of the custodial care facility is stored in the head of chained list, and according to
The custodial care facility information of chained list tail portion storage hangs up corresponding custodial care facility；
If the custodial care facility being present in chained list L is accessed again, by being stored in L with accessed custodial care facility
Corresponding information storage updates corresponding time t to chained list head；Such as：In chained list L, L [0]-L [6] corresponds to custodial care facility respectively
Custodial care facility information in L [4] if custodial care facility e is accessed again at this time, is placed on chained list L by { a, b, c, d, e, f, g }
Head, as a result：
Above-described embodiment be used for illustrate the present invention rather than limit the invention, the present invention spirit and
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (5)
1. a kind of medical wearable device intelligent interactive method based on bluetooth, which is characterized in that this method comprises the following steps：
(1) broadcast oneself state after custodial care facility is ready, guarantee can be scanned by intelligent terminal and be arrived；
(2) intelligent terminal is scanned neighbouring custodial care facility on backstage, when scanning is to custodial care facility, according to custodial care facility
RSSI value calculates the distance of the custodial care facility and intelligent terminal, and the movement locus of the custodial care facility is obtained according to distance value, so as to
Judge the custodial care facility whether close to oneself；If intelligent terminal find the custodial care facility close to oneself, actively to this
Custodial care facility sends authentication request, performs step (3), does not otherwise do interaction process；
(3) after custodial care facility receives the authentication request of intelligent terminal transmission, if after being verified, being built with intelligent terminal
If authentication failed, error message is sent to intelligent terminal for vertical connection.
2. a kind of medical wearable device intelligent interactive method based on bluetooth according to claim 1, which is characterized in that
In the step (2), its distance and movement locus are judged by the bluetooth signal intensity of custodial care facility, it is specific as follows：
After intelligent terminal is scanned to neighbouring custodial care facility, intelligent terminal can obtain the title name of the custodial care facility, set
Standby number id and RSSI value information；Distance d of the custodial care facility apart from intelligent terminal is calculated according to RSSI value, computational methods are as follows：
Wherein, RSSI is custodial care facility signal strength；A is the signal of custodial care facility when intelligent terminal and custodial care facility are separated by 1 meter
Intensity；N is the environmental attenuation factor；By continuously recording the distance d of custodial care facility, can obtain one group with time t it is relevant away from
From D；Fitting a straight line is carried out to D by least square method and obtains movement locus of the custodial care facility relative to intelligent terminal；If it waits to intend
Closing straight line is：D=a+bt；Wherein, a represents intercept, and b represents slope；
For the N group data (t obtained by same time interval measurementi, di), i=1,2 ..., N, with Least Square Method parameter
When, it is desirable that observation diThe weighted sum of squares of deviation be minimum, i.e. the value of following formula is minimum：
Upper examination asks local derviation to obtain a, b respectively：
Equation group is obtained after arrangement：
The best estimate of parameter a and parameter b are obtained after solving above-mentioned equation：
From the value of parameter b acquire custodial care facility relative to intelligent terminal be far from or close：If b>0, then monitoring is set
For far from intelligent terminal；If b<0, then custodial care facility is close to intelligent terminal.
3. a kind of medical wearable device intelligent interactive method based on bluetooth according to claim 1, which is characterized in that
In the step (3), intelligent terminal is included into the authentication request that custodial care facility is sent using JWT (JSON Web
Tokens) the Token values of standard, are denoted as Toke_a, which includes three parts：Header, payload, signature,
It is split with point between per part, is encoded by Base64；Custodial care facility verifies intelligent terminal identity according to Toke_a,
After being verified, custodial care facility sends Token_b to intelligent terminal, and intelligent terminal verifies custodial care facility identity by Token_b,
Both sides' authentication is established by the way that rear connection is formal.
4. a kind of medical wearable device intelligent interactive method based on bluetooth according to claim 1, which is characterized in that
Intelligent terminal can connect any number of custodial care facility, specially：When new custodial care facility connection, intelligent terminal detection is worked as
Whether the custodial care facility quantity of preceding connection is more than that bluetooth connection limits, if more than limitation, by lru algorithm from currently connecting
Geju City connection is selected in list of devices to hang up, and then connects new custodial care facility；The corresponding custodial care facility of old connection selected
It is placed in the list of devices of hang-up, if it is desirable, patient can restore connection from the list of devices of hang-up at any time.
5. a kind of medical wearable device intelligent interactive method based on bluetooth according to claim 4, which is characterized in that
Geju City connection is selected by lru algorithm from the custodial care facility list currently connected to hang up, specially：Connected device is arranged
Table is stored with chain sheet form, is denoted as chained list L；For each custodial care facility connected, intelligent terminal preserves in chained list L
To the access time t of the custodial care facility；Chained list L is ranked up according to the access time t of each custodial care facility；If there is new prison
Shield equipment needs to connect, then the information of the custodial care facility is stored in the head of chained list, and the monitoring stored according to chained list tail portion
Facility information hangs up corresponding custodial care facility；If the custodial care facility being present in chained list L is accessed again, will be deposited in L
The information corresponding with accessed custodial care facility of storage is stored to chained list head, and updates corresponding time t.
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| CN201810036961.6A CN108245132B (en) | 2018-01-15 | 2018-01-15 | Bluetooth-based intelligent interaction method for medical wearable equipment |
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| CN111371942A (en) * | 2018-12-06 | 2020-07-03 | 深圳Tcl新技术有限公司 | Method and system for realizing motion sensing based on iBeacon |
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| CN108245132B (en) | 2020-07-14 |
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