CN102230782A - Portable low-power wireless bridge health status monitoring system and monitoring method thereof - Google Patents
Portable low-power wireless bridge health status monitoring system and monitoring method thereof Download PDFInfo
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- CN102230782A CN102230782A CN2011100608051A CN201110060805A CN102230782A CN 102230782 A CN102230782 A CN 102230782A CN 2011100608051 A CN2011100608051 A CN 2011100608051A CN 201110060805 A CN201110060805 A CN 201110060805A CN 102230782 A CN102230782 A CN 102230782A
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Abstract
The invention relates to a portable low-power wireless bridge health status monitoring system and a monitoring method thereof. The system comprises a front acquisition apparatus and a receiving apparatus. The front acquisition apparatus comprises an ARM9 processor 1 which is connected with a Zigbee module 1, a dynamic resistance instrument, a memory 1 and a clock circuit in the front acquisition apparatus, and a power supply 1 used for supplying power. The receiving apparatus comprises an ARM9 processor 2 which is connected with a Zigbee module 2, a memory 2 and a clock circuit 2 in the receiving apparatus, and a power supply 2 used for supplying power. During monitoring the front acquisition apparatus is fixed on a bridge stress control cross section to collect bridge strain parameter information, pack the information data, and send the information data to a wireless network. The receiving apparatus receives the information data for displaying and storing. According to the system in the invention, real-time and long-term monitoring of the bridge health status is realized. The system has the advantages of safety and high efficiency in data acquisition, low power dissipation and portability.
Description
Technical field
The present invention relates to monitoring system, be specifically related to a kind of portable low power-consumption wireless bridge health status monitoring system and monitoring method thereof.
Background technology
" 512 " Wenchuan special violent earthquake causes serious harm for Sichuan Province's domestic some areas traffic, and facilities such as the whole province's highway, bridge all are subjected to havoc, removes these peripheral provinces and cities and suffers earthquake effect, and impaired bridge also reaches thousands of seats.Bridge is that investment is huge, the important foundation facility that life cycle is long, so the security that bridge uses has very important influence to national economy.Health monitoring to the calamity axle casing is significant.The bridge health status detects the sensing and the communication technology that is meant that utilization is modern, in time (termly or after the accident) gather the running parameter of bridge, by computing machine running parameter is discerned, processed and analyzes, provide the health status or the damage status of bridge, for bridge inspection and maintenance, maintenance and management decision provide foundation and guidance, and provide the long-term design verification of full size cun true member, true environment for the development of Bridge Design theory.
The bridge health monitoring system that begins various scales abroad starts from the middle and later periods eighties 20th century, domestic bridge monitoring and evaluating system is started late, and has how tame unit and colleges and universities to carry out the theoretical research in early stage.Also set up the structure monitoring system of different scales in recent years on some large-scale important bridge, the existing bridge security monitoring means of China is difficult to realize long-term real-time monitoring to the health parameters of bridge; At the bridge state after the calamity, need monitor at any time, prior art can't satisfy this requirement fully.The most traditional mode is to adopt the survey record and the experience of manually carrying out data to judge in the existing bridge monitoring system, this mode information gathering speed is slow, an image data finishing bridge structure is consuming time longer, is difficult to guarantee the consistance of each Monitoring Data duty.In addition, data are being measured, record, artificial error even the mistake of unavoidable introducing in the processing procedure.Because the bridge region disperses, the remote districts, many places mostly are work high above the ground, and manual measurement datamation difficulty is big during bridge construction and the operation.Also have optical cable wired bridge monitoring mode in addition, utilize special optical cable to set up being connected of front-end collection and monitoring equipment data, this method shortcoming is the cost height, and maintenance difficulties is big, and monitoring equipment need be fixed.Existing wireless monitor system uses GSM or cdma network to be connected to the Internet, be connected to monitoring equipment by route again, this method major defect is that most of bridge present position does not have public wireless (CDMA, GSM and 3G network) or cable network to cover, simultaneity factor is complicated, monitoring node is difficult to form network on the bridge, remote-wireless transmitter power is bigger, is difficult to realize the long term monitoring of bridge health status.
Summary of the invention
Technical matters to be solved by this invention is at deficiency of the prior art, a kind of employing wireless technology is provided, to bridge health status carry out in real time, long term monitoring, by wireless network realize the single bridge collection of fixed point and move in the portable low power-consumption wireless bridge health status monitoring system and the monitoring method thereof that receive fast continuously of a plurality of bridge datas.
The scheme that the present invention solves the problems of the technologies described above is: bridge health status monitoring system that a kind of portable low power-consumption is wireless is characterized in that this system is made up of front-end collection device and receiving trap:
Described front-end collection device comprises ARM9 processor one, the Zigbee module one, dynamic resistance instrument, storer one and the clock circuit one that link to each other with described ARM9 processor one; And be the power supply one of described ARM9 processor one, storer one and one power supply of Zigbee module;
Described ARM9 processor one is converted to the information that described dynamic resistance instrument is gathered in real time by A/D, and the package information data are controlled the information data after described Zigbee module one wireless transmission is packed; Described ARM9 processor one is connected with described Zigbee module one by serial ports;
Described storer one comprises SDRAM and FLASH, and described SDRAM and FLASH storer are realized the buffer memory of described ARM9 processor one data;
Described clock circuit one provides system clock for described ARM9 processor one;
Described Zigbee module one is used for information data is sent by wireless network;
Described dynamic resistance instrument is used to carry out the detection of the coefficient of strain;
Described receiving trap comprises ARM9 processor two, the Zigbee module two that links to each other with described ARM9 processor two, LCD screen, storer two and clock circuit two; And be the power supply two of described ARM9 processor two, storer two and two power supplies of Zigbee module;
Described ARM9 processor two is responsible for receiving information datas, and information data is shown and preserves;
Described storer two comprises SDRAM and FLASH storer, and described SDRAM and FLASH storer are realized the buffer memory of described ARM9 processor two data;
Described clock circuit two provides system clock for described ARM9 processor two;
Described ARM9 processor two is used to control described Zigbee module two and sets up radio communication with the front-end collection device, receives information data, controls described LCD on-screen-display message data and information data is stored in the described storer two;
Described Zigbee module two is used for receiving the information data that wireless network transmits;
Described LCD screen is used to show the information data of collecting.
Described dynamic resistance instrument is the dynamic strain indicator that is used to measure the bridge strain parameter.
Described ARM9 processor one and ARM9 processor two all adopt the S3C2410 processor.
What described Zigbee module 1 adopted is the IP-Link1221-2163 module.
Utilize the wireless bridge health status of described portable low power-consumption monitoring system to carry out the method for bridge health status monitoring, it is characterized in that this method may further comprise the steps:
A) described front-end collection device is fixed in bridge Stress Control section, and makes described dynamic resistance instrument be close to this control cross section;
B) described front-end collection device is gathered the bridge strain parameter information by described dynamic resistance instrument, and the package information data, and the information data of controlling after described Zigbee module one will be packed sends in the wireless network;
C) described receiving trap receives the bridge strain information datas by described Zigbee module two, the bridge strain information data is shown and is stored in the described storer two by described LCD screen.
The present invention compared with prior art has the following advantages: can carry out in real time bridge health status, long term monitoring, by wireless network receive fast, accurately convenient, by wireless network realize the single bridge collection of fixed point and move in the receiving fast continuously of a plurality of bridge datas; And use this equipment to carry out safe and efficient, the low in energy consumption and portable advantage of equipment of information acquisition.
Below by accompanying drawing and case study on implementation, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 uses synoptic diagram for the wireless bridge health status of the present invention monitoring system;
Fig. 2 is the structural representation of the wireless bridge health status of the present invention monitoring system front-end collection device and receiving trap;
Fig. 3 is the structural representation of a kind of embodiment of the present invention's wireless bridge health status monitoring system;
Fig. 4 is front-end collection device flow chart of data processing figure of the present invention;
Fig. 5 is front-end collection device data transmission flow process figure of the present invention;
Fig. 6 is a receiving trap workflow diagram of the present invention;
Description of reference numerals:
| The 1-receiving trap; | 2-front-end collection device; | The 3-wireless network; |
| 6-Zigbee module one; | 7-dynamic resistance instrument; | 8-Zigbee module two; |
| The 9-LCD screen; | 11-ARM9 processor one; | 12-power supply one; |
| 13-storer one; | 14-clock circuit one; | 15-ARM9 processor two; |
| 16-power supply two; | 17-storer two; | 18-clock circuit two; |
Embodiment
The wireless bridge health status of a kind of portable low power-consumption monitoring system as shown in Figure 1, form by front-end collection device 2 and receiving trap 1:
Front-end collection device 2 is fixed in bridge Stress Control cross section (as main span spaning middle section, end bay spaning middle section) to be located, and at set intervals, front-end collection device 2 is measured the compliance voltage of a bridge deformation, obtains corresponding strain parameter and storage.After the monitoring personnel were near the hand-held receiving trap 1 of bridge unlatching, front-end collection device 2 was set up the transmission that image data is then carried out in wireless connections with receiving trap 1, storage and analysis after the receiving trap 1 reception data.
Front-end collection device 2 as shown in Figure 2 comprises ARM9 processor 1, the Zigbee module 1 that links to each other with ARM9 processor 1, dynamic resistance instrument 7, storer 1 and clock circuit 1; Power supply 1 is ARM9 processor 1, storer 1 and one 6 power supplies of Zigbee module.
ARM9 processor 1 is converted to the information that dynamic resistance instrument 7 is gathered in real time by A/D, package information data, the information data after the packing of control Zigbee module one 6 wireless transmissions.ARM9 processor 1 is connected with Zigbee module 1 by serial ports.
Zigbee module 1: be used for information data is sent by wireless network 3;
Dynamic resistance instrument 7: be used to carry out the detection of the coefficient of strain.
Receiving trap 1 comprises ARM9 processor 2 15, the Zigbee module 28 that links to each other with ARM9 processor 2 15, LCD screen 9, storer 2 17 and clock circuit 2 18;
ARM9 processor 2 15 processors are responsible for receiving information data, and information data is shown and preserves;
ARM9 processor 2 15 is used to control the radio communication of 28 foundation of Zigbee module and front-end collection device 2, receives information data, and control LCD shields 9 display message data and information data is stored in the storer 2 17;
Zigbee module 28: be used for receiving the information data that wireless network 3 transmits;
LCD screen 9: be used to show the information data of collecting.
ARM9 processor 1 in the front-end collection device 2 as shown in Figure 3, what specifically adopt is the S3C2410 processor of Samsung company.Dynamic resistance instrument 7 uses dynamic resistance strain instrument.What Zigbee module 1 adopted is the IP-Link1221-2163 module.
The S3C2410 processor is 16/32 RISC architecture that Samsung company releases, and uses the powerful instruction set of ARM920T CPU nuclear; The advanced person's of ARM band MMU architecture is supported WINCE, EPOC32, LINUX; 0.25um the CMOS standard macroelement and the memory compiler of technology.S3C2410 provides abundant build-in components, has reduced the cost of system, for receiving equipment and general type application provide high performance-price ratio and high performance microcontroller solution.S3C2410 is the core of system, and system is handled and controls.
Storer comprises SDRAM and FLASH storer two parts, and SDRAM is a kind of volatile memory, and the data of its storage can be lost after the power down, with its running space as program; The Flash storer is a nonvolatile memory, and data are not lost after the power down, with its storage space as program and data.
That ARM9 processor 2 15 adopts in the receiving trap 1 is the S3C2410 of Samsung company.What Zigbee module 28 specifically adopted is the IP-Link1221-2163 module.LCD screen 9 is selected the 3.5 cun TFT screens LTV350QV-F04 of Samsung for use.Receive by Zigbee module 28 after the information data of front-end collection device 2, be presented at LCD screen 9 and be stored in the storer 2 17.What storer 2 17 adopted is the Flash storer.
Bridge health status monitoring system that portable low power-consumption is wireless is carried out the method for bridge health status monitoring, it is characterized in that this method may further comprise the steps:
(1) front-end collection device 2 is fixed in bridge Stress Control section, and makes dynamic resistance instrument 7 be close to this control cross section;
(2) front-end collection device 2 is gathered the bridge strain supplemental characteristic by dynamic resistance instrument 7, by Zigbee module 1 the bridge strain supplemental characteristic is sent in the wireless network 3;
(3) receiving trap 1 receives bridge strain parameter data in the wireless networks 3 by Zigbee module 28, shows and is stored in the storer 2 17 by 9 pairs of bridge strain supplemental characteristics of LCD screen.
Receiving trap 1 can carry fixed point collection by personnel, also can carry by mobile device (train, automobile), realizes the fast concentrated wireless collection of a large amount of bridge datas in the motion.
Principle of work: in the monitoring of bridge strain coefficient, the Vibration Parameter of care is mainly the strain of structure, and native system is a target with measurement structure strain and pontic outward appearance.Can directly measure the time-domain curve of the stress-strain of bridge structure by sensor and analyze kinetic parameters such as to obtain its coefficient of impact afterwards, observe the pontic surface condition, judge the bridge security situation by empirical value by image capture module.
Dynamic resistance instrument 7 is to form with superfine metallic resistance filament winding one-tenth or with tinsel printing corrosion, be attached to strainometer on the test specimen securely with alite paste, when test specimen is subjected under the external force effect, relative changes delta e/e takes place in length, stick on the also respective change of strain ga(u)ge on the test specimen, changes delta R/R has also taken place in the resistance value of strainometer, so just the resistance apparatus-electric bridge of the variation of mechanical quantity-distortion conversion electric weight-resistance value with sensitivity, measure the changes delta R/R of flat resistance, just can converse the phase strain stress, if this electric bridge comes scale with strain, just can directly read strain, finish the electrical measurement of non electrical quantity, strainmeter is calibrated according to this principle, " strain effect " of strain ga(u)ge is meant that above-mentioned mechanical quantity converts the relation of electric weight to, characterizes with " sensitivity coefficient " K of strain ga(u)ge:
When the test specimen stress deformation, cause brachium pontis change in resistance Δ R/R by " strain effect ", destroyed the balance of electric bridge, output terminal has the voltage output of a Δ U.
Wherein E is electric bridge supply voltage (2V).Can draw the phase strain stress of bridge by the magnitude of voltage that records.
The layout of dynamic resistance instrument 7 will be decided according to version, generally will be according to the theoretical analysis result of kinematic behavior, the vibration shape general shape that draws according to Theoretical Calculation, in the bigger position placement sensor of displacement, be advisable can record the maximum reaction of bridge structure (as main span spaning middle section, end bay spaning middle section amplitude).
Front-end collection device 2 has intelligent wireless networking function, it not only has its position regional environment parameter and transfer function, simultaneously can with adjacent area in lay other gather front ends and realize wireless self-networking automatically, realize the relay transmission of remote area information, realize the darker network degree of depth, break through the covering of short-distance wireless communication technology, realize the network coverage.Receiving trap 1 can be accepted the strain information of whole nodes at the arbitrary node of self-organizing network.
Front-end collection device 2 possesses the wireless awakening function, is in the dormancy node state under the non-collection situation, to save energy consumption.
Two modules all adopt built-in Linux operating system in the native system, select arm-libc-gcc as development platform.The linux system advantage is powerful, as supports multiple architecture, supports ICP/IP protocol, supports multifile system etc., and at the micro control system design, it is widely used in built-in field at present specially.Arm-libc-gcc be under the linux system at the cross compilation environment of ARM9, mainly high-level programming language is converted to the set of machine language instruction.Whole translation and compiling environment comprises compiler, assembler, connector, loading bin, pretreater, debugger etc.
Front-end collection device 2 software main programs comprise two threads, data processing thread as shown in Figure 4 and data transmission line journey shown in Figure 5.After powering on, system at first finishes initialization, creates data processing thread and data transmission line journey then.The data processing thread comprises data processing task and data storage task, at first enter data processing task, after entering this task, system wait fixed point Time Triggered, the strain signal that reception immediately and processes sensor obtain in case the fixed point time arrives, the voltage signal that is about to receive converts stress numerical to.After stress numerical is finished dealing with, log-on data store tasks, the data storage area that data storage is pre-set in the Flash storer.After the data storage, the return data Processing tasks continues to wait for the arrival of timing.Promptly when system received the transmission order, log-on data sent task to the data transmission line journey, sent data to receiving trap 1.After data all were sent completely, return data sent task, orders to be sent such as continuation.
As shown in Figure 6, the software of receiving trap 1 comprises 4 tasks: Data Receiving task, data processing task, data storage task and demonstration task.Behind the system initialization, at first start Zigbee module 28 and set up wireless communication link with front-end collection device 2, be that log-on data receives the 2 transmission data transmission orders of task forward end harvester, log-on data store tasks after the link establishment reception data, promptly start embedded bridge stress parameters analysis software data are carried out Treatment Analysis, log-on data store tasks after obtaining a result, the data storage area that data storage is pre-set in the storer 2 17, start the demonstration task at last, data message is presented on the LCD screen 9.
Claims (5)
1. the wireless bridge health status of portable low power-consumption monitoring system is characterized in that this system is made up of front-end collection device and receiving trap:
Described front-end collection device comprises ARM9 processor one, the Zigbee module one, dynamic resistance instrument, storer one and the clock circuit one that link to each other with described ARM9 processor one; And be the power supply one of described ARM9 processor one, storer one and one power supply of Zigbee module;
Described ARM9 processor one is converted to the information that described dynamic resistance instrument is gathered in real time by A/D, and the package information data are controlled the information data after described Zigbee module one wireless transmission is packed; Described ARM9 processor one is connected with described Zigbee module one by serial ports;
Described storer one comprises SDRAM and FLASH, and described SDRAM and FLASH storer are realized the buffer memory of described ARM9 processor one data;
Described clock circuit one provides system clock for described ARM9 processor one;
Described Zigbee module one is used for information data is sent by wireless network;
Described dynamic resistance instrument is used to carry out the detection of the coefficient of strain;
Described receiving trap comprises ARM9 processor two, the Zigbee module two that links to each other with described ARM9 processor two, LCD screen, storer two and clock circuit two; And be the power supply two of described ARM9 processor two, storer two and two power supplies of Zigbee module;
Described ARM9 processor two is responsible for receiving information datas, and information data is shown and preserves;
Described storer two comprises SDRAM and FLASH storer, and described SDRAM and FLASH storer are realized the buffer memory of described ARM9 processor two data;
Described clock circuit two provides system clock for described ARM9 processor two;
Described ARM9 processor two is used to control described Zigbee module two and sets up radio communication with the front-end collection device, receives information data, controls described LCD on-screen-display message data and information data is stored in the described storer two;
Described Zigbee module two is used for receiving the information data that wireless network transmits;
Described LCD screen is used to show the information data of collecting.
2. the wireless bridge health status of portable low power-consumption according to claim 1 monitoring system is characterized in that described dynamic resistance instrument is the dynamic strain indicator that is used to measure the bridge strain parameter.
3. according to claim 1 or the wireless bridge health status of the described portable low power-consumption of claim 2 monitoring system, it is characterized in that described ARM9 processor one and ARM9 processor two all adopt the S3C2410 processor.
4. according to claim 1 or the wireless bridge health status of the described portable low power-consumption of claim 2 monitoring system, what it is characterized in that described Zigbee module one 6 employings is the IP-Link1221-2163 module.
5. utilize the wireless bridge health status of the described portable low power-consumption of claim 1 monitoring system to carry out the method for bridge health status monitoring, it is characterized in that this method may further comprise the steps:
A) described front-end collection device is fixed in bridge Stress Control section, and makes described dynamic resistance instrument be close to this control cross section;
B) described front-end collection device is gathered the bridge strain parameter information by described dynamic resistance instrument, and the package information data, and the information data of controlling after described Zigbee module one will be packed sends in the wireless network;
C) described receiving trap receives the bridge strain information datas by described Zigbee module two, the bridge strain information data is shown and is stored in the described storer two by described LCD screen.
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Application publication date: 20111102 |