CN107396438A - Communication port construction method, method for synchronizing time and structure health monitoring method based on smart mobile phone WLAN - Google Patents

Communication port construction method, method for synchronizing time and structure health monitoring method based on smart mobile phone WLAN Download PDF

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Publication number
CN107396438A
CN107396438A CN201710742702.0A CN201710742702A CN107396438A CN 107396438 A CN107396438 A CN 107396438A CN 201710742702 A CN201710742702 A CN 201710742702A CN 107396438 A CN107396438 A CN 107396438A
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control terminal
mobile phone
collection
terminal
wlan
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CN107396438B (en
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张东昱
田家栋
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Harbin Institute of Technology Institute of artificial intelligence Co.,Ltd.
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Harbin Institute of Technology
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to monitoring structural health conditions field, and in particular to communication port construction method, method for synchronizing time and structure health monitoring method based on smart mobile phone WLAN.The present invention can only realize that single-site data acquisition is analyzed to solve existing smart mobile phone structure detection method, the time synchronized being not carried out between mobile phone, and then the analysis result reliability that causes obtained Modal detection and non-destructive tests it is not high the shortcomings that, and a kind of communication port construction method based on smart mobile phone WLAN is proposed, including：Prepare some smart mobile phones, select one to be used as control terminal, build WLAN, other connect WLAN as collection terminal；Collection terminal opens particular port, waits Socket Client to be attached；The IP address for being connected to all collection terminals of control terminal WLAN is obtained, and builds the Socket Client of corresponding number, is connected respectively with the Socket Server in each collection terminal, builds complete Socket communication ports.The present invention is applied to structural health detection device.

Description

Communication port construction method, time synchronized side based on smart mobile phone WLAN Method and structure health monitoring method
Technical field
The present invention relates to monitoring structural health conditions field, and in particular to the communication port structure based on smart mobile phone WLAN Construction method, method for synchronizing time and structure health monitoring method.
Background technology
Skyscraper and bridge are the important infrastructure of modern society, and the normal operation to entire society plays important Supporting role.The structure safe condition of these buildings is not only directly connected to the security of the lives and property of people, also contributes to its people Economic normal operation.During long-term use, due to environmental attack, material aging, load long-term effect and component defect Etc. factor collective effect, structure inevitably will gradually produce damage accumulation, cause its depression of bearing force, or even jeopardize structure Safe handling.In the last few years, great personnel were caused there occurs the major accident of a lot of engineering structure unstabilitys all over the world Injures and deaths and property loss, and ill effect is generated to society.These tragedies remind people, by efficient configuration health monitoring Technology, monitoring of structures state, identified in time after damage occurs in structure, to ensureing that service structure is most important safely.
Traditional structural healthy monitoring system uses sensor special, because sensor special cost is high, causes to install number Measure it is limited, for construction is complicated, the free degree is numerous actual building structure itself, it is difficult to obtain lesion size and portion exactly Position.In the last few years, powerful smart mobile phone was widely available.Smart mobile phone is not only integrated with acceleration transducer, gyroscope Etc. a variety of high-performance sensors and GPS module, powerful data sampling and processing, storage and transmittability are also equipped with, for using intelligence Energy mobile phone carries out monitoring structural health conditions and provides possibility.What is used in smart mobile phone is typically all piezoelectric transducer, has pressure The advantages that accuracy that electric-type sensor has is high, linear behavior is good, and wherein it is integrated with the module of a large amount of advanced technology System, in that context it may be convenient to be called so as to serve every field, facility is provided for people.At present its application aspect compared with To be extensive, such as the health monitoring of human body, car crass, home wiring control, library management, motion identification etc..Meanwhile intelligent hand Application study of the machine in terms of monitoring structural health conditions also starts to walk gradually, and Dalian University of Technology's Zhao's snowy peak et al. have developed Orion cloud Cell (Orion CC) smart mobile phone structural health cloud monitoring system.The program realizes adopts to intelligent mobile phone sensor data Collection, analysis and the function such as upload, and bridge cable Suo Li test has been carried out by Han Ruicong et al. with this program, demonstrate data Availability.
And research and application of the current smart mobile phone in terms of structure monitoring, the data acquisition of single-point can only be realized and divided Analysis, does not realize the collaborative work between mobile phone, and the result that this obtains Analysis on monitoring data is relatively limited, obtained mode inspection Survey and the analysis result reliability of non-destructive tests is not high.
The content of the invention
It can only realize that the data of single-point are adopted in terms of the invention aims to solve existing smart mobile phone structure detection Collection and analysis, do not realize the time synchronized between mobile phone, and then cause Monitoring Data to carry out Cooperative Analysis, obtained knot The shortcomings that fruit is relatively limited, and obtained Modal detection and the analysis result reliability of non-destructive tests be not high, and propose one kind and be based on Communication port construction method, method for synchronizing time and the structure health monitoring method of smart mobile phone WLAN.
A kind of communication port construction method based on smart mobile phone WLAN, including：
Step 1: preparing the smart mobile phone of predetermined quantity, select wherein one to be used as control terminal, build WLAN Network, other connect the WLAN as collection terminal；
Step 2: collection terminal opens particular port, Socket Client are waited to be connected with Socket Server identity Connect；
Step 3: reading linux kernel/proc/net/arp catalogues, acquisition, which is connected to control terminal WLAN, owns The IP address of collection terminal, and build the Socket Client of corresponding number, respectively with the Socket in each collection terminal Server connections, build complete Socket communication ports.
A kind of method for synchronizing time based on smart mobile phone WLAN, including：
Step 1: using foregoing communication port construction method, the communication built between control terminal and each collection terminal is led to Road；
Step 2: control terminal receive start synchronizing signal after, by communication channel to all collection terminals send itself when Between label t1[1]；
Step 3: all collection terminals receive the time tag t of control terminal1When [1], an its temporal label t is produced2 [1], and to control terminal t is returned1[1], t2[1]；
Step 4: control terminal records t1[1] and t2[1], control terminal when and record receives collection terminal turn around time label Time tag t3[1]；
Step 5: repeat step two to four n times, obtains array t1[n], t2[n], t3[n]；
Step 6: to array t1[n]、t2[n]、t3[n] carries out data cleansing, rejecting abnormalities value；
Step 7: seek the average t of each array after cleaning1, t2, t3；
Step 8: the difference DELTA t=(t of each collection terminal and control terminal time shaft are tried to achieve respectively2-t1)-(t3-t1)/2；
Step 9: each collection terminal according to difference DELTA t by local system time-triggered protocol into the time synchronous with control terminal.
A kind of structure health monitoring method based on smart mobile phone, including：
Step 1: using foregoing method for synchronizing time using as the mobile phone of control terminal and several as collection terminal Mobile phone carries out time synchronized；
Step 2: the mobile phone as collection terminal is positioned on civil structure to be measured；
Step 3: control terminal sends data acquisition signal to collection terminal, makes collection according to the start recording order received End gathers the acceleration transducer data of itself, and on the basis of control terminal time shaft, is passed every unit interval record acceleration Sensor data, form data file；
Step 4: after default timing terminates or stopped manually, terminate collection；
Step 5: after terminating collection, respective data file is sent to control terminal by all collection terminals.
Beneficial effects of the present invention are：1st, the IP that itself wireless local area network (WLAN) system distributes to collection terminal is read by control terminal Location, the Socket Server of the corresponding multiple Socket Client active call collection terminals of structure, establishes Socket connections, changes One multiple Socket Client of Socket Server connections of tradition AD HOC；2nd, non-real time operating system is being carried Smart mobile phone between realize high-precision time synchronized so that the obtained result of monitoring analysis is more accurate, obtained mode inspection Survey and the analysis result reliability of non-destructive tests is higher；3rd, transmitted between control terminal and collection terminal by Socket connections mutual Time tag, obtain each equipment time shaft, this process is carried out it is multiple, and time tag is carried out normal approach, data cleansing, The specific algorithm process such as error concealment, makes whole network possess high-precision unified time.
Brief description of the drawings
Fig. 1 is the flow chart of the method for synchronizing time based on smart mobile phone of the present invention；
Fig. 2 is the time tag t of the present invention1、t2Collection and delay Analysis schematic diagram；
Fig. 3 is the time tag t of the present invention3Collection and delay Analysis schematic diagram；
Fig. 4 is the flow chart of the structure health monitoring method based on smart mobile phone of the present invention；
Fig. 5 is the surface chart of the one embodiment for the data file that control terminal receives.
Embodiment
Embodiment one：The communication port construction method based on smart mobile phone WLAN of present embodiment, Including：
If Step 1: preparing cadre's smart mobile phone, one builds WLAN, other are used as and adopted as control terminal Collect end, connect the WLAN；
Step 2: collection terminal opens particular port, Socket Client are waited to be connected with Socket Server identity Connect；
Step 3: reading linux kernel/proc/net/arp catalogues, acquisition, which is connected to control terminal WLAN, owns The IP address of collection terminal, and build the Socket Client of corresponding number, respectively with the Socket in each collection terminal Server connections, build complete Socket communication ports.
Embodiment two：Present embodiment is unlike embodiment one：In step 3, if control terminal All-network connection is actively disconnected, then repeats step 3 and re-establishes connection；If collection terminal loses the company with control terminal Connect, repeat step two and step 3 re-establish the connection with control terminal.
Other steps and parameter are identical with embodiment one.
Embodiment three：The method for synchronizing time based on smart mobile phone WLAN of present embodiment, such as Fig. 1 It is shown, including：
Step 1: built using the method as described in embodiment one or two between control terminal and each collection terminal Communication port；
Step 2: control terminal receive start synchronizing signal after, by communication channel to all collection terminals send itself when Between label t1[1]。
Step 3: collection terminal receives the time tag t of control terminal1When [1], an its temporal label t is produced2[1]。
Step 4: control terminal records t1[1] and t2[1], control terminal when and record receives collection terminal turn around time label Time tag t3[1]。
Step 5: repeat step two to four n times, obtains array t1[n], t2[n], t3[n]。
Step 6: to array t1[n]、t2[n]、t3[n] carries out data cleansing, rejecting abnormalities value.
Step 7: seek the average t of each array after cleaning1, t2, t3。
Step 8: the difference DELTA t=(t of each collection terminal and control terminal time shaft are tried to achieve respectively2-t1)-(t3-t1)/2。
Step 9: each collection terminal according to difference DELTA t by local system time-triggered protocol into the time synchronous with control terminal.
The Computing Principle of client and service end time shaft difference is specifically described below：
Time tag is sent to the process of collection terminal as illustrated in fig. 2, it is assumed that when control terminal is with a certain collection terminal from control terminal The true difference of countershaft is Δ t, and it sends its temporal label t to this collection terminal after receiving lock in time order1, in time tag In transmission process, the delay of control terminal signal from handling to sending is Δ t1, network delay is Δ t2, collection terminal is from receiving signal It is Δ t to the delay handled3, then collection terminal is by its temporal t at that moment after processing2The time sent with control terminal Label relatively obtains Δ t ' afterwards, has
Δ t '=t2-t1 (2-1)
Δ t '=Δ t1+Δt2+Δt3+Δt (2-2)
After the completion of collection terminal processing, to control terminal turnaround time label information, in time tag information Recovery Process, adopt Integrate the delay of end signal from handling to sending as Δ t4, network delay is Δ t5, control terminal prolongs from signal is received to what is handled When be Δ t6, then control terminal is by its temporal t at that moment after processing3With t1Δ t " can be obtained by comparing, and be had
Δ t "=t3-t1 (2-3)
Δ t "=Δ t1+Δt2+Δt3+Δt4+Δt5+Δt6 (2-4)
Information two-way process, path is identical, therefore can consider
Δt1+Δt2+Δt3=Δ t4+Δt5+Δt6 (2-5)
It can be obtained by formula 2-4 and formula 2-5
(the Δ t of Δ t "=21+Δt2+Δt3) (2-6)
Δ t can be eliminated by formula 2-1,2-2,2-3,2-61+Δt2+Δt3, Δ t ', Δ t ", obtain
Δ t=(t2-t1)-(t3-t1)/2 (2-7)
Embodiment four：Present embodiment is unlike embodiment three：Step 6 is specially：
Step 6 one, seek array t1The average value of [n]Wherein N is array t1The time marks in [n] The number of label；t1iRepresent array t1I-th of time tag in [n].
Step 6 two, seek array t1The standard deviation sigma of [n]：
Step 6 three, judged, ifThen retain t1i；Otherwise by t1iFrom array t1 Rejected in [n].
Step 6 four, to array t1Each time tag in [n] performs step 6 three, the array t after being cleaned1 [n]。
Step 6 five, to array t2[n]、t3[n] performs step 6 one to step 6 four, the array t after being cleaned2[n] With array t3[n]。
Other steps and parameter are identical with embodiment three.
Embodiment five：Present embodiment provides a kind of structure health monitoring method based on smart mobile phone, such as Fig. 4 It is shown, including：
Step 1: method as described in any one in embodiment three or four is used using as the mobile phone of control terminal And several carry out time synchronized as the mobile phone of collection terminal；
Step 2: the mobile phone as collection terminal is positioned on civil structure to be monitored；
Step 3: control terminal sends data acquisition signal to collection terminal, makes collection according to the start recording order received End gathers the acceleration transducer data of itself, and on the basis of control terminal time shaft, is passed every unit interval record acceleration Sensor data, form data file；
Step 4: after default timing terminates or stopped manually, terminate collection；
Step 5: after terminating collection, respective data file is sent to control terminal by all collection terminals.
For example, operating personnel first synchronize the time of each mobile phone, i.e., on the basis of control terminal mobile phone, remaining is made Synchronized for the mobile phone of collection terminal.Then the mobile phone as collection terminal is positioned in structure to be monitored, and operational control End, makes control terminal send signal to collection terminal, and collection terminal sets collection acceleration sensing according to control terminal upon receipt of the signals Device data.Data acquisition is terminated using timer timing or terminates to be used as end point manually.After collection terminates, collection terminal will be adopted The data collected are sent to control terminal.After control terminal receives data, data are arranged and shown, specific interface is as schemed Shown in 5.Wherein data file shares 4 row, and A is classified as the time-histories information on the basis of control terminal time shaft, and B, C, D row are respectively this Acceleration information on this each axial direction of collection terminal acceleration transducer of moment.
The present invention can also have other various embodiments, in the case of without departing substantially from spirit of the invention and its essence, this area Technical staff works as can make various corresponding changes and deformation according to the present invention, but these corresponding changes and deformation should all belong to The protection domain of appended claims of the invention.

Claims (5)

  1. A kind of 1. communication port construction method based on smart mobile phone WLAN, it is characterised in that including：
    Step 1: preparing the smart mobile phone of predetermined quantity, select wherein one to be used as control terminal, build WLAN, its He connects the WLAN as collection terminal；
    Step 2: collection terminal opens particular port, Socket Client are waited to be attached with Socket Server identity；
    Step 3: reading linux kernel/proc/net/arp catalogues, acquisition is connected to all collections of control terminal WLAN The IP address at end, and the Socket Client of corresponding number are built, connect respectively with the Socket Server in each collection terminal Connect, build complete Socket communication ports.
  2. 2. the communication port construction method according to claim 1 based on smart mobile phone WLAN, it is characterised in that In step 3, if control terminal actively disconnects all-network connection, repeat step 3 and re-establish connection；If collection terminal The connection with control terminal is lost, repeat step two and step 3 re-establish the connection with control terminal.
  3. A kind of 3. method for synchronizing time based on smart mobile phone WLAN, it is characterised in that including：
    Step 1: using such as leading between any one methods described structure control terminal and each collection terminal in claim 1 or 2 Believe passage；
    Step 2: control terminal is received after starting synchronizing signal, its temporal mark is sent to all collection terminals by communication channel Sign t1[1]。
    Step 3: collection terminal receives the time tag t of control terminal1When [1], an its temporal label t is produced2[1]。
    Step 4: control terminal records t1[1] and t2[1], and record control terminal when receiving collection terminal turn around time label when Between label t3[1]。
    Step 5: repeat step two to four n times, obtains array t1[n], t2[n], t3[n]。
    Step 6: to array t1[n]、t2[n]、t3[n] carries out data cleansing, rejecting abnormalities value.
    Step 7: seek the average t of each array after cleaning1, t2, t3。
    Step 8: the difference DELTA t=(t of each collection terminal and control terminal time shaft are tried to achieve respectively2-t1)-(t3-t1)/2。
    Step 9: each collection terminal according to difference DELTA t by local system time-triggered protocol into the time synchronous with control terminal.
  4. 4. the time tag synchronous method according to claim 3 based on smart mobile phone, it is characterised in that step 6 is specific For：
    Step 6 one, seek array t1The average value of [n] Wherein N is array t1Of time tag in [n] Number；t1iRepresent array t1I-th of time tag in [n].
    Step 6 two, seek array t1The standard deviation sigma of [n]：
    Step 6 three, judged, ifThen retain t1i；Otherwise by t1iFrom array t1 [n] Reject.
    Step 6 four, to array t1Each time tag in [n] performs step 6 three, the array t after being cleaned1[n]。
    Step 6 five, to array t2[n]、t3[n] performs step 6 one to step 6 four, the array t after being cleaned2[n] sum Group t3[n]。
  5. A kind of 5. structure health monitoring method based on smart mobile phone, it is characterised in that including：
    Step 1: use method as described in any one in claim 3 or 4 using as the mobile phone of control terminal and several Mobile phone as collection terminal carries out time synchronized；
    Step 2: the mobile phone as collection terminal is positioned on civil structure to be monitored；
    Step 3: control terminal sends data acquisition signal to collection terminal, adopts collection terminal according to the start recording order received Collect the acceleration transducer data of itself, and on the basis of control terminal time shaft, acceleration transducer is recorded every the unit interval Data, form data file；
    Step 4: after default timing terminates or stopped manually, terminate collection；
    Step 5: after terminating collection, respective data file is sent to control terminal by all collection terminals.
CN201710742702.0A 2017-08-25 2017-08-25 Channel construction, time synchronization and structure health monitoring method based on smart phone Active CN107396438B (en)

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CN109752642A (en) * 2018-12-20 2019-05-14 深圳市科陆电子科技股份有限公司 A kind of clock module calibration method and its system, equipment, storage medium
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