CN101251433B - System and method for measuring wireless remote control type deflection for bridge load experiment - Google Patents
System and method for measuring wireless remote control type deflection for bridge load experiment Download PDFInfo
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- CN101251433B CN101251433B CN2008100695293A CN200810069529A CN101251433B CN 101251433 B CN101251433 B CN 101251433B CN 2008100695293 A CN2008100695293 A CN 2008100695293A CN 200810069529 A CN200810069529 A CN 200810069529A CN 101251433 B CN101251433 B CN 101251433B
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Abstract
The invention discloses a wireless remote control type deflection measuring system and a method for a bridge load experiment, the measuring system comprises laser projecting devices, an image collecting device, a control and data processing device, a remote controller and a wireless communication controller. The remote controller and the wireless communication controller can transmit and receive communication signals to and from each other; the control and data processing device integrally controls the laser projecting devices arranged on measuring points through the remote controller and the wireless communication controller, thereby completing the quick switchover of the measurement at the measuring points; the control and data processing device processes the image information collected by the image collecting device and finally generates the deflection variables of the measuring points at the bridge. The wireless remote control type deflection measuring system and the method greatly reduce the manpower and material cost of the deflection measurement in the bridge load experiment with reasonable configuration and convenient execution. In addition, the wireless remote control type deflection measuring system and the method can complete measurement at a plurality of points in a short time during the deflection measurement in the bridge load experiment, thereby improving the efficiency and accuracy of the bridge load experiment.
Description
Technical field
The present invention relates to the bridge monitoring apparatus field, especially a kind of wireless remote control type deflection measuring system and measuring method thereof that is used for bridge load experiment.
Background technology
Bridge construction has a far reaching influence for social and economic development.In links such as Bridge Design, construction, operations, any small carelessness all may lead to heavy losses even catastrophic failure, gently then influence traffic, consume a large amount of maintenance costs, heavy then bridge is ruined the people and is died, causes huge casualties and property loss, says that from this point the requirement of the security of the middle-size and small-size bridge that huge large bridge of investment and investment are less is of equal importance.Therefore guaranteeing the security of most bridge operation phase, is a severe problem of whole world science of bridge building circle and governability authorities, also is simultaneously the general common problem in a management and the decision-making, has great society, economy, scientific meaning.Influence owing to factors such as being subjected to environment, use, wear out, bridge is certain to occur the distortion (usually said amount of deflection) of vertical direction, the distortion of the vertical direction of bridge is the important behaviour of bridge health status, if be deformed to a certain degree is that the deflection of bridge span variation surpasses to a certain degree, and bridge just occurs the danger of collapsing.Carry out bridge load experiment, collect the deflection of bridge span change information, thereby the health status that can judge the bridge that has come into operation guarantees the operation that bridge can safety and Health, also help to verify Bridge Design rationality, condition of construction, guarantee bridge when throwing in operation security and can accumulate design experiences, the design, construction and the safe operation that therefore carry out bridge load experiment and be bridge have significant meaning.At present, bridge load test deflection test method mainly adopts mechanical type displacement meter method, electronic type displacement meter method and precision level method.
1 mechanical type displacement meter method
Mechanical type displacement meter method is used Meter Test amounts of deflection such as dial gauge, clock gauge always, and this method is installed with easy to use, reliable reading, not affected by environment, measuring accuracy is high but this method need be set up work trestle and observation framing scaffold, and the observation personnel are many, automatically record, observed reading is time-consuming.Be only applicable to set up under the bridge science of bridge building of support.
2 electronic type displacement meter methods
Electronic type displacement meter method resistance-type displacement meter commonly used and this method of strain-type displacement meter test amount of deflection need not set up the observation framing scaffold, can adopt testing recorder, reading is simple, convenient, and required personnel are few, data are acquisition and recording automatically, handling safety, the resolution height, reaction velocity is fast, higher but the Installation and Debugging of its measuring accuracy comparatively bother, the influence of measuring accuracy and strained sticking Quality of stability and environment, and still need set up work trestle, be only applicable to can set up under the bridge science of bridge building of support.
3 precision level methods
Precision level method s type spirit-leveling instrument test commonly used amount of deflection.This method need not set up work trestle and observation framing scaffold, and measuring accuracy is higher, but generally needs to change station observation, and observation time is longer.For the large span bridge, observation time is long, and observation is trouble quite, and measuring accuracy stability is subject to observe the influence of factors such as personnel's level.
This shows that for the long-span bridge beam, adopt said method test bridge load amount of deflection, required test back work is many, the test duration is long, and often is subjected to various objective factor influences, causes the deflection test precision to descend to some extent.What is more important will comprehensively be estimated the security of a bridge block structure, it is far from being enough only depending on the amount of deflection situation of change of measuring at one or two, also should measure the amount of deflection of a plurality of key positions on the bridge structure, can predict the health status of bridge by the variation tendency of bridge linearity, therefore, load experiment need be measured simultaneously to a plurality of measuring point amounts of deflection of bridge usually, usually need 8 points or more, yet, the bridge load test loads the axle casing state and is difficult to keep for a long time, need in about 30 seconds, survey have a few, therefore must measure the accuracy of measuring to improve fast.The deflection data that uses existing laser deflection test device to measure multi-measuring point simultaneously has a lot of defectives to be left to be desired; For example, when adopting existing laser deflection test instrument, there is the bridge of water to finish quick measurement under the long and bridge of, longitudinal gradient big very big difficulty is arranged for span, if artificial switch laser grenade instrumentation, between two measuring points tens meters distance is arranged, survey crew is covered two distances between the measuring point and is all wanted time a few minutes, and long-span bridge is very long, four or five hundred meters of having are long even longer, and elapsed time can be longer; If adopt the start and stop of common remote control thereof remote control laser projection device also still need spend long time, for example adopt intercom or common key-press formula telepilot to open or close laser projection device, cost on not only having increased manually, and manually-operated speed still can not satisfy the quick Testing requirement of multi-measuring point; If the laser projection device of each measuring point to different acceptance screens, then certainly will increase the manpower and materials cost with laser projections; The laser projection device of each measuring point is during with laser projections to receiving screen, must handle the overlapping problem of different measuring points hot spot well, at this moment, then number of spots quantity is many more if fruit is measured simultaneously, the easy more overlapping of hot spot, and the image acquisition and processing program is big more to the difficulty of discerning different hot spots, therefore amount of deflection measuring point quantity is restricted, if point-to-point measurement will guarantee that not only the quick switching of each measuring point laser projection device is to satisfy the requirement of Measuring Time, and will get hold of each measuring point laser projection device switching time and just can carry out the hot spot data acquisition of corresponding measuring point, otherwise can cause the laser facula data of different measuring points to obscure mutually; Existing technical scheme can't address the above problem fully.Therefore, aspect the bridge load experiment test, lack a kind of reasonably and easily, can in very short time, finish multiple spot deflection metrology technical scheme rapidly.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of wireless remote control type deflection measuring system that is used for bridge load experiment, this system configuration is reasonable, implement simple, easy to operate, the amount of deflection that greatly reduces the bridge load test detects the manpower and materials cost, can be implemented in and finish the multiple spot deflection metrology in very short time rapidly, improve the efficient and the accuracy of load experiment deflection metrology.
Be to arrive above-mentioned purpose, the present invention by the following technical solutions:
The wireless remote control type deflection measuring system that is used for bridge load experiment of the present invention, comprise laser projection device, image collecting device, control and data processing equipment, telepilot and wireless communication controller, telepilot and wireless communication controller can send and receive communication signal mutually; Described wireless communication controller links to each other with laser projection device, and described telepilot links to each other with data processing equipment with described control; Described control and data processing equipment send command signal, this command signal is launched by telepilot, wireless communication controller receives described telecommand and controls the start and stop of laser projection device, wireless communication controller feeds back to telepilot with the start and stop status information of described laser projection device, and telepilot is passed to described control and data processing equipment with this start and stop status information; Described image collecting device comprises camera and laser target, and described laser projection device projected spot is to laser target; Described camera aligning laser target is shot with video-corder the light spot image on the laser target, and light spot image information is passed to described control and data processing equipment; Default control and data processor in described control and the data processing equipment, the treatment step of this program comprises control and treatment is carried out in the signal transmission between telepilot and control and the data processing equipment that the treatment step of this program comprises that also camera is transmitted light spot image information to carry out acquisition process and generate the amount of deflection variable quantity.
Further, described wireless communication controller comprises radio communication Transmit-Receive Unit, control module, electric-controlled switch and umbering device; Control module links to each other respectively with radio communication Transmit-Receive Unit, electric-controlled switch and umbering device, and electric-controlled switch links to each other with described laser projection device; The radio communication Transmit-Receive Unit receives the telecommand of described telepilot, then command signal is passed to control module, thereby control module recognition instruction signal is controlled the start and stop that electric-controlled switch is controlled described laser projection device then; The radio communication Transmit-Receive Unit also feeds back to telepilot with the start and stop status information of described laser projection device; Described umbering device is provided with numbering in order to give described laser projection device;
Further, also comprise the A-frame of movable adjusting, described laser projection device removably is fixed on the A-frame top, also is provided with regulator is regulated described laser projection device in order to trace laser emitting direction on the three-legged support;
Further, described camera adopts the wide-angle imaging head;
Further, adopt the RS-232 serial line interface between described telepilot and control and the data processing equipment, adopt the usb data interface between described camera and control and the data processing equipment.
Another object of the present invention is to provide a kind of and adopts the described wireless remote control type deflection measuring system that is used for bridge load experiment to carry out the method that deflection of bridge span is measured, and may further comprise the steps:
A., the wireless communication controller of a laser projection device and a correspondence is set respectively at a plurality of amount of deflection measuring points of bridge to be measured, a laser target is set, adjust the laser emitting direction of each laser projection device and aim at this laser target at permanent datum; Give each laser projection device numbering, and the numbering correctness of testing authentication laser;
B. the laser projection device of one of them measuring point is opened in remote control;
C. confirm that the laser projection device of the described measuring point of b step opens, gather representation of laser facula information then;
D. carry out pattern distortion and recover to handle, determine the location of pixels of laser facula, the pixel location data of this laser facula is carried out record as the initial measurement data of the described measuring point of b step;
E. close the laser projection device of the described measuring point of b step, and confirm that this shutoff operation enters into force;
F. repeating step b to e writes down all measuring point initial measurement data;
G. the load that the bridge loading experiment is required repeats the operation of b to f step, and difference is, when repeating the d step, determine the location of pixels of laser facula after, the pixel location data of this laser facula is carried out record as the measurement data once more of corresponding measuring point;
H. the first measurement data of each measuring point is compared with measurement data once more, the location of pixels that draws twice laser facula changes, thereby draws the relative variation of corresponding measuring point amount of deflection.
The invention has the beneficial effects as follows: the present invention adopts the start and stop of the method for radio communication remote control by telepilot remote control laser projection device, the wireless communication controller of a laser projection device and a correspondence is set respectively at a plurality of measuring points of bridge during enforcement, a plurality of laser projection device laser projections directions are aimed at same laser target, telepilot carries out the radio communication contact with the wireless communication controller of different measuring point, each wireless communication controller receives the instruction unlatching of telepilot or closes corresponding laser projection device and also the start and stop status signal of this laser projection device fed back to telepilot, telepilot further is passed to control and data processing equipment with this start and stop status signal, control and carry out of data processing equipment according to the status signal centralized control measurement step that transmits of telepilot, thereby that realizes the different measuring points laser projection device has an order quick switching in steps, avoid the interference between the different hot spots and obscured, improved measuring accuracy and accuracy; Because adopt rational technical scheme to make the present invention realize full-automatic multiple spot deflection metrology, measuring speed improves greatly, has satisfied the time requirement of bridge load experiment multiple spot deflection metrology; Because system configuration of the present invention is reasonable, enforcement is simple and convenient, the amount of deflection that can greatly reduce the bridge load test detects the manpower and materials cost, has improved work efficiency, and is especially more obvious for long-span bridge Liangqi beneficial effect.Advantage of the present invention, target and feature will embody in the following description to a certain extent to be set forth, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.Target of the present invention and other advantages can be passed through instructions, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a theory diagram of the present invention;
Use synoptic diagram when Fig. 2 is of the present invention enforcement;
Fig. 3 is the video data acquiring calculation flow chart of the present invention to each tested point.
Embodiment
As shown in Figure 1, the wireless remote control type deflection measuring system that is used for bridge load experiment of present embodiment comprises laser projection device 1, image collecting device, control and data processing equipment 4, telepilot 5, identification number device 10 and wireless communication controller 9; Described image collecting device comprises camera 3 and laser target 2; Described wireless communication controller 9 comprises radio communication Transmit-Receive Unit 6, control module 7 and electric-controlled switch 8.The electric-controlled switch 8 of described wireless communication controller 9 links to each other with laser projection device 1; Telepilot 5 has the function of receiving and transmitting signal, and telepilot 5 can send and receive wireless communication signal mutually with radio communication Transmit-Receive Unit 6; Telepilot 5 emission telecommands, the radio communication Transmit-Receive Unit 6 of wireless communication controller 9 receive described telecommand and control the start and stop of laser projection device 1; The radio communication Transmit-Receive Unit 6 of wireless communication controller 9 also can feed back to telepilot 5 by wireless mode with the start and stop status signal of laser projection device 1; Described telepilot 5 links to each other with data processing equipment 4 with control, telepilot 5 emission telecommands are given described wireless communication controller 9, the start and stop of wireless communication controller 9 control laser projection devices 1 also are transmitted to telepilot 5 with the start and stop status signal feedback of laser projection device 1, telepilot 5 passes to described control and data processing equipment 4 with the start and stop status signal of the laser projection device 1 of wireless communication controller 9 feedback, and the status signal that described control and data processing equipment 4 feed back according to telepilot determines to begin to gather laser projection device 1 and projects light spot image information on the laser target 2; Described laser projection device 1 projected spot is to laser target 2; Described camera 3 aligning laser targets 2 are shot with video-corder the light spot image on the laser target, and light spot image information is passed to described control and data processing equipment 4, this control and data processing equipment 4 interior preset data handling procedures are handled generation amount of deflection variable quantity to light spot image information.The control module 7 of wireless communication controller 9 links to each other with electric-controlled switch 8 with radio communication Transmit-Receive Unit 6 respectively, and electric-controlled switch 8 links to each other with described laser projection device 1; Radio communication Transmit-Receive Unit 6 receives the telecommand of described telepilot 5, then command signal is passed to control module 7, thereby control module 7 recognition instruction signals is controlled the start and stop that electric-controlled switch 8 is controlled described laser projection device 1 then.Wireless communication controller 9 also comprises a umbering device 10, and umbering device 10 links to each other with control module 7, in order to give laser projection device 1 corresponding numbering is set.
During concrete enforcement, laser projection device 1 adopts the some laser projecting apparatus, point laser projecting apparatus quantity can be determined according to the actual conditions of bridge to be measured, each point laser projecting apparatus correspondence respectively is provided with a wireless communication controller 9, promptly is provided with a some laser projecting apparatus and a wireless communication controller 9 in each bridge test point; Laser target 2 adopts and partly throws receiving screen; Camera 3 adopts wide-angle CCD/COMS video camera; Control is adopted common notebook computer with data processing equipment 4; Telepilot 5 adopts infrared and radio communication telepilot, and this telepilot has the function that receives wireless communication signals, adopts the RS-232 serial line interface between infrared remote controller and the notebook computer, adopts the usb data interface between video camera and the notebook computer; Control module 7 adopts singlechip controller AT89C51; Umbering device 10 has the numbering display.The A-frame of the movable adjusting of wireless remote control type deflection measuring system that is used for bridge load experiment of present embodiment, described some laser projecting apparatus is detachably fixed to the top of A-frame, also be provided with regulator on the three-legged support in order to regulate the laser emitting direction of described some laser projecting apparatus, regulator is the adjustment disk that can regulate up and down, this regulator mainly is the fine setting to the laser emitting direction, coarse adjustment is the telescopic adjustment level by A-frame self, and the project organization of laser projection device 1 self can be finished the coarse adjustment up and down of laser emitting direction.
General loading test need be surveyed the deflection data of a plurality of points simultaneously, and conventional device is difficult to measure simultaneously a plurality of points, loading test loading axle casing state is difficult to keep for a long time in addition, need in about 30 seconds, survey have a few, if artificial switch laser grenade instrumentation has tens meters distance between two measuring points, survey crew is covered two distances between the measuring point and is all wanted time a few minutes, and long-span bridge is very long, and four or five hundred meters of having are long even longer, and elapsed time can be longer; If adopt the start and stop of common remote control thereof remote control laser projection device also still need spend long time, for example adopt intercom or common key-press formula telepilot to open or close laser projection device, cost on not only having increased manually, and manually-operated speed still can not satisfy the quick Testing requirement of multi-measuring point; If the laser projection device of each measuring point to different acceptance screens, then certainly will increase the manpower and materials cost with laser projections; The laser projection device of each measuring point is during with laser projections to receiving screen, must handle the overlapping problem of different measuring points hot spot well, at this moment, then number of spots quantity is many more if fruit is measured simultaneously, the easy more overlapping of hot spot, and the image acquisition and processing program is big more to the difficulty of discerning different hot spots, therefore amount of deflection measuring point quantity is restricted, if point-to-point measurement will guarantee that not only the quick switching of each measuring point laser projection device is to satisfy the requirement of Measuring Time, and will get hold of each measuring point laser projection device switching time and just can carry out the hot spot data acquisition of corresponding measuring point, otherwise can cause the laser facula data of different measuring points to obscure mutually; Existing technical scheme can't address the above problem fully.
Implementation process when further introducing measuring system of the present invention and be used to measure 5 measuring point deflection metrologies below in conjunction with Fig. 2.
With system of the present invention bridge to be measured is carried out load experiment when collecting 5 measuring point deflection datas simultaneously, the system of present embodiment comprises 5 some laser projecting apparatuss (11,12,13,14,15), each point laser projecting apparatus correspondence respectively is provided with a wireless communication controller, promptly is provided with the wireless communication controller of a some laser projecting apparatus and a correspondence at each measuring point.Each some laser projecting apparatus is separately positioned on the A-frame, each A-frame is arranged on 5 amount of deflection measuring points of bridge to be measured, and the regulator on the A-frame of adjustment each point laser projecting apparatus correspondence can project on the half transmitting receiving screen 16 each point laser projecting apparatus emitting laser; Ccd video camera 17 is located at the rear of half transmitting receiving screen 16 over against half transmitting receiving screen 16; Infrared and radio communication telepilot 19 links to each other by the RS-232 serial line interface with notebook computer 18, links to each other by the usb data interface between ccd video camera 17 and the notebook computer 18.Default control and data processor in the notebook computer 18, this program has operation interface, the measurement button at clicking operation interface just can be realized the full automatic measurement one by one of each measuring point, when using systematic survey of the present invention, beating on target of a point of a point of laser, each only the need surveyed a point, and the laser projections of different measuring points is switched rapidly accurately, therefore, can improve the accuracy of efficiency of measurement and measurement.Infrared and radio communication telepilot 19 sends the start and stop of the some laser projecting apparatus of telecommand control different measuring points under notebook computer 18 controls, the different measuring points pointwise is carried out the measurement of primary data, after bridge loads, the measurement data once more after same pointwise obtains to load.When measuring each data of each measuring point, notebook computer 18 by infrared and radio communication telepilot 19 at first the wireless communication controller of this measuring point of remote control open the some laser projecting apparatus of this measuring point, after the some laser projecting apparatus is opened, the start and stop status signal that wireless communication controller will be put laser projecting apparatus is transmitted to infrared and radio communication telepilot 19 by the wireless mode feedback, infrared and radio communication telepilot 19 passes to described notebook computer 18 with the start and stop status signal of the some laser projecting apparatus of wireless communication controller feedback, described notebook computer 18 begins to gather this laser projecting apparatus according to the status signal decision of telepilot feedback and projects light spot image information on the half transmitting receiving screen 16, after the light spot image collection finishes, notebook computer 18 sends the instruction of cutting out this laser projecting apparatus by infrared and radio communication telepilot 19, the wireless communication controller of this measuring point receives this command information the point laser projecting apparatus of correspondence is closed, after this laser projecting apparatus is closed, the wireless communication controller of this measuring point feeds back to infrared and radio communication telepilot 19 with the start and stop status signal of the some laser projecting apparatus of correspondence, the start and stop status signal of the some laser projecting apparatus that infrared and radio communication telepilot 19 will be received passes to described notebook computer 18, and notebook computer 18 determines just to begin to instruct after this laser projecting apparatus is closed the some laser projecting apparatus of opening next measuring point.Whole measuring process is as follows:
(1) when bridge does not load, carry out following a to h step,
A. the some laser projecting apparatus 11 of one of them measuring point is opened in remote control;
B. an affirmation point laser projecting apparatus 11 has been opened, and gathers representation of laser facula information then;
C. carry out pattern distortion and recover to handle, determine the location of pixels of laser facula, the pixel location data of this laser facula is carried out record as the initial measurement data of a laser projecting apparatus 11 place measuring points;
D. close close point laser projecting apparatus 11, and confirm that this shutoff operation enters into force;
E. adopt the method identical, the initial measurement data of acquisition point laser projecting apparatus 12 place measuring points with step a to d;
F. adopt the method identical, the initial measurement data of acquisition point laser projecting apparatus 13 place measuring points with step a to d;
G. adopt the method identical, the initial measurement data of acquisition point laser projecting apparatus 14 place measuring points with step a to d;
H. adopt the method identical, the initial measurement data of acquisition point laser projecting apparatus 15 place measuring points with step a to d;
(2) after bridge loads, carry out following i to p step,
I. the some laser projecting apparatus 11 of one of them measuring point is opened in remote control;
J. an affirmation point laser projecting apparatus 11 has been opened, and gathers representation of laser facula information then;
K. carry out pattern distortion and recover to handle, determine the location of pixels of laser facula, the pixel location data of this laser facula is carried out record as the measurement data once more of a laser projecting apparatus 11 place measuring points;
L. close close point laser projecting apparatus 11, and confirm that this shutoff operation enters into force;
M. adopt the method identical, the measurement data once more of acquisition point laser projecting apparatus 12 place measuring points with step I to 1;
N. adopt the method identical, the measurement data once more of acquisition point laser projecting apparatus 13 place measuring points with step I to 1;
O. adopt the method identical, the measurement data once more of acquisition point laser projecting apparatus 14 place measuring points with step I to 1;
P. adopt the method identical, the measurement data once more of acquisition point laser projecting apparatus 15 place measuring points with step I to 1;
(3) bridge is loaded before and load the initial measurement data of each measuring point of back and once more measurement data compare, draw the location of pixels variation of twice laser facula, thereby draw the relative variation of corresponding measuring point amount of deflection.
Fig. 3 is the video data acquiring calculation flow chart of the present invention to each tested point, as shown in Figure 3, default control and data processor in the control of the embodiment of the invention and the data processing equipment, the data processing section of this program is handled light spot image information and is generated the amount of deflection variable quantity, at each amount of deflection measuring point, control and the data processing step of data processing equipment include initial data acquisition step 20 and data acquisition step 30 once more, initial data acquisition step 20 and once more data acquisition step 30 include following steps: at first carry out the collection of camera data, carry out pattern distortion then and recover to handle, determine that at last the location of pixels of laser facula is as the initial measurement data; At each amount of deflection measuring point, with initial data acquisition step 20 and once more data acquisition step 30 rapid data compare, the location of pixels that draws twice laser facula changes, thereby draws the relative variation of this measuring point amount of deflection.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, the modification that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. the wireless remote control type deflection measuring system that is used for bridge load experiment is carried out the method that deflection of bridge span is measured, the described wireless remote control type deflection measuring system that is used for bridge load experiment comprises laser projection device, image collecting device, control and data processing equipment, it is characterized in that: also comprise telepilot and wireless communication controller, telepilot and wireless communication controller can send and receive communication signal mutually; Described wireless communication controller links to each other with laser projection device, and described telepilot links to each other with data processing equipment with described control; Described control and data processing equipment send command signal, this command signal is launched by telepilot, wireless communication controller receives described command signal and controls the start and stop of laser projection device, wireless communication controller feeds back to telepilot with the start and stop status information of described laser projection device, and telepilot is passed to described control and data processing equipment with this start and stop status information; Described image collecting device comprises camera and laser target, and described laser projection device projected spot is to laser target; Described camera aligning laser target is shot with video-corder the light spot image on the laser target, and light spot image information is passed to described control and data processing equipment; Default control and data processor in described control and the data processing equipment, the treatment step of this program comprises control and treatment is carried out in the signal transmission between telepilot and control and the data processing equipment that the treatment step of this program comprises that also camera is transmitted light spot image information to carry out acquisition process and generate the amount of deflection variable quantity;
Described wireless communication controller comprises radio communication Transmit-Receive Unit, control module, electric-controlled switch and umbering device; Control module links to each other respectively with radio communication Transmit-Receive Unit, electric-controlled switch and umbering device, and electric-controlled switch links to each other with described laser projection device; The radio communication Transmit-Receive Unit receives the telecommand of described telepilot, then command signal is passed to control module, thereby control module recognition instruction signal is controlled the start and stop that electric-controlled switch is controlled described laser projection device then; The radio communication Transmit-Receive Unit also feeds back to telepilot with the start and stop status information of described laser projection device; Described umbering device is provided with numbering in order to give described laser projection device;
It is characterized in that: the method that the described wireless remote control type deflection measuring system that is used for bridge load experiment is carried out the deflection of bridge span measurement may further comprise the steps:
A., the wireless communication controller of a laser projection device and a correspondence is set respectively at a plurality of amount of deflection measuring points of bridge to be measured, a laser target is set, adjust the laser emitting direction of each laser projection device and aim at this laser target at permanent datum; Give each laser projection device numbering, and the numbering correctness of testing authentication laser;
B. the laser projection device of one of them measuring point is opened in remote control;
C. confirm that the laser projection device of the described measuring point of b step opens, gather representation of laser facula information then;
D. carry out pattern distortion and recover to handle, determine the location of pixels of laser facula, the pixel location data of this laser facula is carried out record as the initial measurement data of the described measuring point of b step;
E. close the laser projection device of the described measuring point of b step, and confirm that this shutoff operation enters into force;
F. repeating step b to e writes down all measuring point initial measurement data;
G. the load that the bridge loading experiment is required repeats the operation of b to f step, and difference is, when repeating the d step, determine the location of pixels of laser facula after, the pixel location data of this laser facula is carried out record as the measurement data once more of corresponding measuring point;
H. each measuring point initial measurement data is compared with measurement data once more, the location of pixels that draws twice laser facula changes, thereby draws the relative variation of corresponding measuring point amount of deflection.
2. the wireless remote control type deflection measuring system that is used for bridge load experiment according to claim 1 is carried out the method that deflection of bridge span is measured, it is characterized in that: the three-legged support that also comprises movable adjusting, described laser projection device removably is fixed on the three-legged support top, also is provided with regulator is regulated described laser projection device in order to trace laser emitting direction on the three-legged support.
3. the wireless remote control type deflection measuring system that is used for bridge load experiment according to claim 1 is carried out the method that deflection of bridge span is measured, and it is characterized in that: described camera adopts the wide-angle imaging head.
4. carry out the method that deflection of bridge span is measured according to each described wireless remote control type deflection measuring system that is used for bridge load experiment in the claim 1 to 3, it is characterized in that: adopt the RS-232 serial line interface between described telepilot and control and the data processing equipment, adopt the usb data interface between described camera and control and the data processing equipment.
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| CN101915650A (en) * | 2010-07-27 | 2010-12-15 | 大连理工大学 | System and method for measuring deflection of bridge structure based on wireless tilt |
| CN103344185A (en) * | 2013-07-08 | 2013-10-09 | 刘晓宇 | Non-contact automatic displacement monitoring device |
| CN103344396B (en) * | 2013-07-16 | 2016-01-20 | 吉林大学 | Based on the bridge deflection measurement system and method for close-range photogrammetry |
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| CN201173847Y (en) * | 2008-04-01 | 2008-12-31 | 重庆交通大学 | Wireless remote control type deflection measuring systems for bridge loading experiment |
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| CN201173847Y (en) * | 2008-04-01 | 2008-12-31 | 重庆交通大学 | Wireless remote control type deflection measuring systems for bridge loading experiment |
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