CN100483279C - Bridge load limit automatic monitoring system - Google Patents
Bridge load limit automatic monitoring system Download PDFInfo
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- CN100483279C CN100483279C CNB2007100473984A CN200710047398A CN100483279C CN 100483279 C CN100483279 C CN 100483279C CN B2007100473984 A CNB2007100473984 A CN B2007100473984A CN 200710047398 A CN200710047398 A CN 200710047398A CN 100483279 C CN100483279 C CN 100483279C
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Abstract
The present invention relates to a bridge load-limiting automatic monitoring system, and comprises a WIM device, two CCD cameras, a data collecting module, a signal processor, a GPRS module, a GPRS communication body, a terminal control drive and a terminal electrical transmission mechanism, a vehicle blocker, a terminal voice player and a terminal screen; the pressure electric signal and image and video signal collected by the CCD cameras are output by the WIM device and sent to the signal processor to process and judge; the signal processor works out the axle spacing of wheels and identifies the number of wheel axles according to the side images of the vehicle; and according to the axle-loading of the vehicle gained by the WIM device, the signal processor also can work out the gross weight of the current vehicle by using the equation of the gross weight of vehicle; so that according to the standard, the current vehicle can be judged to be permitted or not to pass the front bridge and finally, the control instruction can be sent; and thereby, the automation and intelligent of the security monitoring technology in bridge passing can be achieved by a follow-up operational mechanism and the GPRS communications system.
Description
Technical field
What the present invention relates to is the supervisory system in a kind of automatic control technology field, specifically is a kind of a kind of bridge load limit automatic monitoring system that is provided with in order to ensure bridge security.
Background technology
The overload of vehicle problem has caused that the public more and more pays close attention to, under the ordering about of economic interests the phenomenon of the serious overload of numerous cargo trucks everywhere as seen, severe patient the most, its extreme overload is up to more than 114%, according to incompletely statistics, on average overload more than 60%.As everyone knows, not only there is very big potential safety hazard in overload of vehicle to vehicle self, and very easily leads to pernicious traffic hazard, and even more serious is badly damaged road surface and the bridges and culverts structure on the way of meeting.Theoretical analysis as can be known, for the concrete bridge girder construction, the harm of overload is huge, causes steel bar corrosion by concrete cracking thereby can cause excessive amount of deflection to make; Bridge deck concrete breakage, retractor device damage; Cause abutment banket sedimentation, bumping at bridge-head; Diseases such as structure fatigue damage, the permanance of serious harm bridge.Serious overload also can cause bridge structure to destroy, collapse, and causes the heavy losses of life, property.Administering overload is a problem demanding prompt solution, needs the cooperation of a lot of departments.Except highway bridge being provided with the limit for tonnage sign, be to have outside the important practical sense to administering overload problems, the safety problem that relies on advanced technological means fundamentally to solve highway bridge of still needing waits the generation of tragedy to avoid bridge to collapse, and can ensure the sustainable growth of economy to greatest extent.
Find by prior art documents, the Chinese patent name is called: " the full-automatic road of fluid pressure type; bridge load limit device ", application (patent) number: 200420091925.3, this patent is introduced the full-automatic road of a kind of fluid pressure type, the bridge load limit device, it is characterized in that, overload induction oil cylinder group is arranged with respect to ground, each responds to oil cylinder with the interconnected UNICOM of oil pipe, and with the jacking cylinder of oil pressure pipe loop UNICOM car stop, the stop of overload induction oil cylinder depression bar is set in the overload induction oil cylinder group, overload induction oil cylinder depression bar upper end in the overload induction oil cylinder group is provided with overload induction pressing plate, and each overload induction pressing plate is formed separate grating type and arranged.Whether the overload that this device is distinguished big or small vehicle with pressure is installed in each one group on the left and right sides ground of main roads or bridge, and retrograde car blocking device is set.
Above-mentioned " the full-automatic road of fluid pressure type, bridge load limit device " can solve the discriminating and the current problem of prevention by the bridge overloaded vehicle to a certain extent, but, its disadvantage is: 1, " overload induction oil cylinder group is arranged with respect to ground ", this type of pure physical construction, form is very complicated, undoubtedly to all very inconvenience of on-the-spot mounting, commissioning and maintenance; 2, can't adjust " overload induction " standard according to the variation of bridge actual carrying capacity in good time; 3, described " overload induction " in fact only can carry by inductive axis and real sense vehicle gross weight; 4, described " car blocking device drives in the wrong direction ", when vehicle " was overloaded and respond to " the discriminating overload, as long as after vehicle rollback being left " overload and respond to ", " retrograde car blocking device " just is " unpacked " voluntarily, vehicle can reversely easily detour in violation of rules and regulations.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, a kind of bridge load limit automatic monitoring system is provided, make it can under unmanned situation about participating in, realize the full-automatic and Intellectualized monitoring technical functionality of the current limit for tonnage of bridge.
The present invention is achieved by the following technical solutions, and bridge load limit automatic monitoring system of the present invention comprises: automobile dynamically weighing device, two CCD cameras, data acquisition module, signal processor, GPRS module, GPRS communication main body, terminal Control Driver, terminal electric transmission, vehicle pass-through obstruction device, terminal speech player, terminal display screen.The automobile dynamically weighing device under the effect that is subjected to automobile weight with the pressure signal sensing, be converted to the output of electric simulation signal, its output port is connected with the input end of analog signal mouth of data acquisition module, the CCD camera is used for images acquired, its output port is connected to the picture signal input port of data acquisition module through vision cable, the output slot of data acquisition module is connected with the input slot of signal processor, the RS232 interface of signal processor is connected with the RS232 interface of GPRS module, the control output end mouth of signal processor is connected with the input port of terminal Control Driver, the output port of terminal Control Driver is connected with the driving signal input mouth of terminal electric transmission, and the output arm of force of terminal electric transmission is connected with the arm of force of vehicle pass-through obstruction device; The digital speech output interface of signal processor is connected with the input interface of terminal speech player, the demonstration output interface of signal processor is connected with the terminal display screen input interface, the radio frequency of the GPRS module output wireless transmit port main body radio frequency receiving antenna of communicating by letter with GPRS docks, GPRS communication main body radio-frequency transmissions antenna docks with the radio frequency input wireless receiving port of GPRS module, GPRS communication main body radio frequency receives and emitting antenna is same device, can receive and launch the digital modulation signals of different frequency range simultaneously.
Described automobile dynamically weighing device is specifically designed to the pressure (be called for short automobile wheel load) of sensing automotive wheel to ground, and the detected wheel load electric simulation of sensing signal is output the input end of analog signal mouth to data acquisition module; The one CCD camera is used for the collection to automobile side angle wheel and wheel shaft pitch image, the 2nd CCD camera is used to monitor that overloaded vehicle dredges the situation of giving way, two CCD cameras export the image that collects to the picture signal input port of data acquisition module, data acquisition module by with the output/input slot of signal processor with the wheel load digital signal and the parallel signal processor that is delivered to of data image signal that collect, signal processor accurately obtains current automobile after operation image identification and numerical evaluation module axle carries and two important assessment parameters of gross weight, therefore can judge whether current vehicle exceeds the bridge load limit standard.When overloading did not appear in automobile, automobile is normally current not to be affected; When automobile overload, export steering order by the control output end mouth of signal processor to the terminal Control Driver immediately, the terminal Control Driver converts the digital controlled signal that receives to analog drive signal, after power amplification, export electric transmission to as its electric driving power signal enabling terminal electric transmission, under the mechanical force moment effect of terminal electric transmission, the current obstruction device of unlocking vehicle is to stop the overload automobile current; Simultaneously, signal processor is informed overload condition by the terminal speech player to current vehicle, and is forbidden that it passes through the place ahead bridge to terminal speech player output audio digital signals; Simultaneously, signal processor is to terminal display screen output character display message, to current Warning for vehicle overload data message, and monitor that the overloaded vehicle situation that gives way sends the reset instruction of vehicle pass-through obstruction device so that determine whether to the terminal Control Driver by terminal display screen.Signal processor transmits through RS232 interface input GPRS module monitor message to the GPRS communication system, make the GPRS communication system grasp the master data data of bridge load limit monitoring in real time; The radio frequency input wireless receiving port that the GPRS communication system sends to corrected bridge load limit standard monitor terminal GPRS module in real time according to the evaluation and the test result of bridge actual bearer ability, through RS232 interface entering signal processor, therefore realize of the remote monitoring of GPRS communication system again to all monitor terminals.
Described automobile dynamically weighing device, comprise: compression resistance spherical rubber air bag, pressure transducer, signal-transmitting cable, valve cock, the pressure support body, carry the compressed steel plate, each compression resistance spherical rubber air bag respectively glueds joint a pressure support body with equal sectional area up and down, be called upward pressure supporter and downforce supporter, upward pressure supporter and downforce supporter are fastening with year compressed steel plate welding respectively again, be called and upload the compressed steel plate and download the compressed steel plate, upload the compressed steel plate and download between the compressed steel plate and have two physical appearance and parameter identical compression resistance spherical rubber air bag and upward pressure supporter and downforce supporter, a upper section pressure transducer of encapsulation and a valve cock of each compression resistance spherical rubber air bag.When vehicle rolls when uploading the compressed steel plate, the gravity of self is delivered to two compression resistance spherical rubber air bags by uploading compressed steel plate and upward pressure supporter, the pressure that compression resistance spherical rubber air bag is experienced in time is delivered to pressure transducer in airtight cavity volume, pressure transducer is handled by the input port that signal-transmitting cable exports data acquisition module to the wheel load electric simulation signal of sensing for follow-up signal.Wherein, compression resistance spherical rubber air bag is a kind of sealing inflating rubber spheroid of parallel cut up and down that has, and the spheroid external radius is 250mm, and the disk radius of parallel cut is 248mm up and down, and the spheroid wall thickness is 10mm, and the withstand voltage ultimate value of the elastomeric material that adopts reaches
, the sealing gas set pressure is 0.1MPa, it is 1MPa that maximum allows to bear pressure; Pressure transducer, its pressure sensitive range is 0～1.5MPa, transducing signal is exported by signal-transmitting cable.Signal-transmitting cable is extended the periphery until the signal Processing input port of follow-up system by the wire casing in the upward pressure supporter, and cable is the twin-core shielding line.Valve cock in the automobile dynamically weighing device is in order to regulate and to demarcate the gaseous tension in the compression resistance spherical rubber air bag.When the pressure in the compression resistance spherical rubber air bag is lower than set pressure 0.1MPa, make it reach set pressure 0.1MPa by the inside tonifying Qi of valve cock; Otherwise, make it reach set pressure 0.1Mpa by the outside venting of valve cock.Upward pressure supporter and downforce supporter are cylindrical structural, the disk homalographic of the parallel cut up and down of its xsect and compression resistance spherical rubber air bag, and glued joint respectively closely and bonding, upward pressure supporter and downforce supporter again respectively with upload the compressed steel plate and download the welding of compressed steel plate fastening, therefore, compression resistance spherical rubber air bag and upward pressure supporter, downforce supporter, upload the compressed steel plate and download the compressed steel plate and form integral structure up and down each other.Face pressure transducer and valve cock and have two open cylinder grooves on the parallel direction of upward pressure supporter axis, the cylinder groove side direction that faces pressure transducer communicates with the horizontal cylinder groove of uploading the compressed steel plate and is connected with the signal Processing input port of follow-up system in order to the signal-transmitting cable of extending.The open cylinder grooves of in the upward pressure supporter two arrive that the ground port of uploading on the compressed steel plate has the plug of sealing in case be in operation dust and foreign material fall into, and open to seal plug and can conveniently overhaul and debugging work.
When automobile enters the mouth by the bridge monitoring, compression resistance spherical rubber air bag in time is delivered to pressure transducer with the pressure of experiencing in the cavity volume of sealing, conversion of signals through sensor, the output port of pressure transducer have one with the output of the linear wheel load electric simulation signal of pressure, the wheel load electric simulation signal of two pressure transducers is by parallel two input ports that export data acquisition module to of two signal-transmitting cables.
To the dynamic weighing process of automobile, need not the travel speed and the attitude thereof of vehicle are limited.No matter two coaxial (group) wheels roll or asynchronous rolling synchronously, all can utilize two compression resistance spherical rubber air bags to record the force value of tested wheel center of effort i respectively and accurately calculate axletree by mathematical model carries, and then utilize each axle to carry, accurately ask for gross combination weight by the gross combination weight mathematical model again.
Described CCD camera, it is electric charge coupling image acquisition camera, it be a kind of can be under low-light (level) to the image collecting device of subject image sensing and outputting standard video analog signal, wherein, the one CCD camera collection automobile side angle wheel and wheel shaft pitch image, the 2nd CCD camera collection vehicle is dredged the situation map picture that gives way.
Described data acquisition module, be a kind of pressure simulation signal and picture signal collection and pretreated advance signal processing module of being used for, comprise: the first input end of analog signal mouth, the second input end of analog signal mouth, the first picture signal input port, the second picture signal input port, A/D converter, image pretreater are formed with output slot five parts.Wherein, two input end of analog signal mouths are respectively in order to receive two automotive wheels piezoelectricity gas simulating signals that pressure transducer is exported through two signal-transmitting cables in the automobile dynamically weighing device; The output terminal of analog input interface is connected to the input end of A/D converter, and A/D converter is responsible for analog signal conversion is become digital signal and inputs to the input end of signal processor through the output slot; The picture signal input port is in order to accept the picture signal from the output of CCD camera, and wherein, the first picture signal input port receives a CCD camera collection image, and the second picture signal input port receives the 2nd CCD camera collection image; The output terminal of image input port is connected to the input end of image pretreater; The image pretreater is to being decoded and analog to digital conversion by the images acquired signal, and the output signal of image pretreater inputs to the input end of signal processor through the output slot.
Described signal processor comprises: image processing module, numerical evaluation module and control module.Described image processing module, the automobile side angle image is carried out outline line to be extracted, the identification vehicle wheel number of axle, wheel diameter and wheel shaft pixel coordinates from the image of a CCD camera collection, the identification overloaded vehicle situation that gives way from the image of the 2nd CCD camera collection.Described numerical evaluation module, the automobile dynamically weighing device is transmitted, and carry out addition through digitized two the automobile wheel load signals of data acquisition module and obtain axial pressure (abbreviation axial compression) u
iValue, because upward pressure supporter in the automobile dynamically weighing device and the contact area between the high pressure resistant spherical rubber air bag are fixed, according to the relation between gravity and the pressure (pressure), only need to be multiplied by active area by measuring pressure and can obtain the pairing gravity of tested wheel load, therefore utilize axle to carry formula
Calculating can obtain the automobile axle and carry, wherein, and i=1,2,3 ..., i is tested wheel shaft numbering, P
I1, P
I2Be respectively the pressure of first high pressure resistant spherical rubber air bag and second high pressure resistant spherical rubber two wheel/set of wheels of i wheel shaft that air bag bears, S is the contact area between upward pressure supporter and the high pressure resistant spherical rubber air bag, G
I1=P
I1S, G
I2=P
I2S, G
I1, G
I2Two wheel/set of wheels that are respectively the i wheel shaft are respectively to first high pressure resistant spherical rubber air bag and second gravity that high pressure resistant spherical rubber air bag is applied, u
I1, u
I2Be the wheel load electric simulation signal of two pressure transducer outputs, K=P
I1/ u
I1=P
I2/ u
I2Be the scale-up factor between the wheel load electric simulation signal of wheel load and pressure transducer output, u
I1, u
I2After the numerical evaluation through the pre-service of data acquisition module and signal processor, at first obtain the i wheel shaft to the automobile dynamically weighing device axial compression signal u that the result produced that exerts pressure
i=u
I1+ u
I2Value, that is, axial compression equals the addition that two pressure transducers are responded to the wheel load signal, with axial compression u
i, the above-mentioned axle of contact area S and scale-up factor K substitution carries a formula and finally asks for axle and carry; Calculate wheel distance between axles by the wheel shaft pixel coordinates, carry, take turns the number of axle and spacing is calculated gross combination weight, registration of vehicle overload information according to axle again; In signal processor, set up bridge actual bearer capability standard, and reception road network Surveillance center monitors standard by the bridge actual bearer capability standard modified value that the GPRS communication system transmits with the real-time update bridge load limit; Tested vehicle gross weight and axle carried with bridge is maximum allow gross combination weight and maximumly allow axle to carry to compare respectively, the normally current number of record vehicle on the same day, found overloaded vehicle number, the normally current number of accumulative total vehicle and overloaded vehicle number.Described control module, the information translation that will overload is that steering order sends to the terminal Control Driver, steering order comprises instruction of Don't Exceed Weight Limit vehicle pass-through and the reset instruction of vehicle pass-through obstruction device, and described reset instruction is that the access bridge inlet recovers the monitored instruction under the normally current state of vehicle; To terminal speech player output audio digital signals, to terminal display screen output display message; Through the GPRS module to the GPRS communication system and move and to patrol and examine mutual monitor message; When recognition result confirms that overloaded vehicle is from dredging after the track gives way, send the reset instruction of vehicle pass-through obstruction device to the terminal Control Driver, otherwise, continue to send information warning by terminal speech player and terminal display screen to overloaded vehicle, and ask to move and patrol and examine assistance.
Described GPRS module comprises single-chip microcomputer, GPRS chip, SIM card, external interface and growth data storer.Wherein, single-chip microcomputer is supported ICP/IP protocol, is used to control the message pick-up and the transmission of GPRS chip, and carries out data communication by standard RS232 serial ports and peripheral control unit (such as signal processor of the present invention), realize interrupting with software simultaneously, to finish data forwarding; GPRS is the abbreviation of GPRS (General Packet Radio Service), is a kind of communication technology between the second generation and the third generation.GPRS adopts and the logical identical frequency range of cordless communication network GSM of numeral, frequency span, burst structure, the wireless-modulated standard, frequency modulation rule and identical TD-MA frame structure, therefore, when on the basis of gsm system, making up gprs system, most parts of gsm system do not need to do hardware and change, only need do software upgrading, GPRS has been arranged, user's call set-up time shortens greatly, almost can accomplish " always online ", in addition, GPRS is to be that benchmark charges with operator's data quantity transmitted rather than tie-time, thereby makes each user's cost of serving lower; SIM card is called " Subscriber Identity Module ", it is actually an intelligent cards that includes large scale integrated circuit, be used for registered user's significant data and information, have the legal identity that SIM card promptly shows owned gsm communication, the most important function of SIM card is to carry out authentication and encryption.New zone is dialed or when receiving calls, switch all will carry out authentication to the user, to determine whether being validated user when the user moves to.At this moment, SIM card and switch utilize authentication arithmetic simultaneously, and KI and 8 random digits are calculated, and result of calculation is identical, and SIM card admitted, otherwise SIM card is rejected, and the user can't call out.SIM card also can be utilized cryptographic algorithm, and speech is encrypted, and prevents eavesdropping.
Described GPRS communication main body, comprise: transmit/receive antenna, the GPRS serving GPRS support node, the GPRS backbone network, gateway support node, the Internet, the road network monitoring central server, on the logical cordless communication network GSM basis of original numeral, introduce two new network nodes: GPRS serving GPRS support node and gateway support node, GPRS serving GPRS support node and single-chip microcomputer are in same hierarchy level, and the storage unit of following the tracks of single-chip microcomputer realizes security function and Access Control, and be connected to base station system by frame relay, gateway support node is supported the intercommunication with external packet-switched networks, and is communicated with via GPRS backbone network and GPRS serving GPRS support node.The GPRS terminal by interface from client (such as, signal processor of the present invention) obtains data, GPRS integrated data after the processing sends to the GSM base station, integrated data is after the encapsulation of GPRS serving GPRS support node, support that by GPRS backbone network and gateway contact communicates, gateway support node is handled accordingly to integrated data, re-sends to the purpose network, as Internet or network X.25.If integrated data is to send to another GPRS terminal, then generally data are sent to the GPRS serving GPRS support node by the GPRS backbone network, send to the GPRS terminal through transmit/receive antenna again, GPRS communication main body and each GPRS terminal constitute complete GPRS communication system.
Road network monitoring central server in the described GPRS communication main body, its system hardware is not less than working standard configuration (as: PIV1.8G PC-610L/PCA-6006V/PIV2.8G/CPU/256DDR/80GBHDD/50XCDDROM/K B+MOUSE/USB), comprising: to three operational modules of telecommand transmission under the data statistics of determining of bridge load limit standard and correction, overloaded vehicle and analysis, the special circumstances (comprising war preparedness, fire-fighting, bridge maintaining etc.).Wherein, first operational module, determine the bridge load limit standard value according to the data that bridge actual bearer ability rating method (comprising: based on empirical method, loading test method, the design theory method of real bridge investigation) is obtained, and be sent to the signal processor of bridge monitor terminal by the GPRS communication system, so that signal processor is provided with or revises renewal to the bridge load limit standard; Second operational module, receive the vehicle dynamic information that each monitor terminal takes place and carry out data statistics of bridge road traffic and analysis, so that management and decision-making level promote the bridge design level and road and bridge the monitoring technique level, comprise the terminal data image signal in the multidate information that is received; The 3rd operational module, in case special circumstances take place, the road network monitoring central server can directly be assigned telecommand to the monitoring terminal by signal processor, carries out the mandatory control of bridge traffic.
Described terminal Control Driver, the steering order of received signal processor output, the terminal Control Driver converts the digital controlled signal that receives to simulating signal, exports electric transmission to as its electric driving power signal after power amplification.
Described terminal electric transmission is converted into mechanical force moment with the electric power signal of input, starts the vehicle pass-through obstruction device and stops overloaded vehicle current, and perhaps, the vehicle pass-through obstruction device resets, and recovers the monitoring under the normally current state of vehicle.
Described vehicle pass-through obstruction device is a kind of crossbar type mechanical rotating mechanism, is subjected to Don't Exceed Weight Limit vehicle pass-through instruction control, and the vehicle pass-through obstruction device is under the promotion of the terminal electric transmission arm of force, and smooth rotation falls, and is horizontally placed in the middle of the track; Controlled by the reset instruction of vehicle pass-through obstruction device, the vehicle pass-through obstruction device is under the pulling of the terminal electric transmission arm of force, and smooth rotation rises, perpendicular placing by the track.
Described terminal speech player, comprise: digital input interface, D/A converter, audio amplifier circuit and loudspeaker, the digital speech output signal of digital input interface received signal processor, its outlet is connected to the input end of D/A converter again, the output terminal of D/A converter is connected to the input end of note amplifier, and the output terminal of note amplifier is connected to the input end of loudspeaker.Signal processor is delivered to audio digital signals according to data processed result the digital input interface of terminal speech player, after the terminal speech player is received audio digital signals, convert thereof into analog voice signal through D/A converter, through the power amplification of audio amplifier circuit, finally export the complete semanteme of loudspeaker plays to again.
Described terminal display screen, under normal current state, display screen shows the bridge load limit standard, when signal processor judges that current overload of vehicle is limited to pass through, to the input interface input characters shows signal of terminal display screen, promptly on terminal display screen, increase current overload of vehicle data message.
Compared with prior art, the present invention has following beneficial effect: to axle for vehicle carry with the detection of dynamic of gross weight and result of calculation relative error less than 2%, under the prerequisite of permissible error 2%, detection to overloaded vehicle reaches 100% with the discriminating accuracy, the remarkable function that combines with road network Surveillance center remote control is independently monitored in final intellectuality that the present invention has a bridge load limit monitoring and robotization and the control point of confirming, therefore from truly improving the current security of bridge, and alleviated bridge supervisor's labour intensity to greatest extent, simultaneously, road network Surveillance center can obtain the normally current number of vehicle on the same day from each monitor terminal by the GPRS communication system, found the overloaded vehicle number, important dynamic master datas such as normally current number of accumulative total vehicle and overloaded vehicle number provide important evidence for further improving technology such as Bridge Design and railway network planning and management decision.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention
Fig. 1 illustrates, and automobile dynamically weighing device 1, a CCD camera 2, the 2nd CCD camera 3, data acquisition module 4, signal processor 5, GPRS module 6, GPRS communication main body 7, terminal Control Driver 8, terminal electric transmission 9, vehicle pass-through obstruction device 10, terminal speech player 11, terminal display screen 12, bridge monitor terminal 35, GPRS move and patrol and examine 36.
Fig. 2 is an automobile dynamically weighing apparatus structure front elevation of the present invention
Fig. 3 is an automobile dynamically weighing apparatus structure top plan view of the present invention
Fig. 2 and Fig. 3 illustrate, and the first compression resistance spherical rubber air bag 13, the second compression resistance spherical rubber air bag 14, first pressure transducer 15, second pressure transducer 16, first signal-transmitting cable 17, secondary signal transmission cable 18, valve cock 19, upward pressure supporter 20, downforce supporter 21, upload compressed steel plate 22, download compressed steel plate 23.
Fig. 4 is a GPRS inside modules structural drawing of the present invention
Fig. 4 illustrates, GPRS chip 24, SIM card 25, single-chip microcomputer 26, growth data storer 27, RS232 interface 28, signal processor 5.
Fig. 5 is GPRS communication main structure chart of the present invention
Fig. 5 illustrates, transmit/receive antenna 29, GPRS serving GPRS support node 30, GPRS backbone network 31, gateway support node 32, the Internet 33, road network monitoring central server 34.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed embodiment and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: automobile dynamically weighing device 1, a CCD camera 2, the 2nd CCD camera 3, data acquisition module 4, signal processor 5, GPRS module 6, GPRS communication main body 7, terminal Control Driver 8, terminal electric transmission 9, vehicle pass-through obstruction device 10, terminal speech player 11, terminal display screen 12.Go out automotive wheels piezoelectricity gas simulating signal by the automobile dynamically weighing device 1 that is embedded on the access bridge inlet road surface along with the sensing of advancing of automobile, and it is delivered to the input end of analog signal mouth of data acquisition module 4 in real time, the automobile side angle image that the one CCD camera 2 is gathered is connected to the first picture signal input port of data acquisition module 4 through vision cable by its output port, the overload automobile that the 2nd CCD camera 3 is gathered is dredged the situation map picture that gives way is connected to data acquisition module 4 through vision cable by its output port the second picture signal input port, data acquisition module 4 inputs to each automotive wheels piezoelectricity gas simulating signal after the digitizing and pretreated picture signal the input end of signal processor 5 through its output slot, the control output end mouth of signal processor 5 is connected with the input port of terminal Control Driver 8, the output port of terminal Control Driver 8 is connected with terminal electric transmission 9, the output arm of force of terminal electric transmission 9 is connected with the arm of force of vehicle pass-through obstruction device 10, the digital speech output interface of signal processor 5 is connected with the digital input interface of terminal speech player 11, the demonstration output interface of signal processor 5 is connected with terminal display screen 12 input interfaces, and the standard serial RS232 interface of signal processor 5 is connected with the RS232 interface 28 of GPRS module 6.
Working mechanism of the present invention is divided into three subsystems, specifically: form image recognition first subsystem by a CCD camera 2, the 2nd CCD camera 3, data acquisition module 4, signal processor 5; Form numerical evaluation second subsystem by automobile dynamically weighing device 1, data acquisition module 4, signal processor 5; Form control the 3rd subsystem by signal processor 5, GPRS module 6, GPRS communication main body 7, terminal Control Driver 8, terminal electric transmission 9, vehicle pass-through obstruction device 10, terminal speech player 11, terminal display screen 12.First subsystem is being born automobile side angle image outline line drawing, the vehicle wheel number of axle, wheel diameter and the identification of wheel shaft pixel coordinates, and to the give way identification of situation of overloaded vehicle; Second subsystem, asking for each axle of tested automobile according to automobile dynamically weighing device 1 output signal carries, follow again according to the vehicle wheel number of axle, wheel diameter and wheel shaft pixel coordinates, use gross combination weight Equation for Calculating tested vehicle gross weight, and whether overload according to the current current load-carrying vehicle of standard determination of regulation of limit for tonnage bridge; The 3rd subsystem, when vehicle exceeds the limit for tonnage standard, signal processor 5 output steering orders are to terminal Control Driver 8, power signal after terminal Control Driver 8 is amplified drives the arm of force of terminal electric transmission 9 drive vehicle pass-through obstruction devices 10 and closes porte-cochere, simultaneously, signal processor 4 is realized the voice and the literal of current overload of vehicle information are warned to terminal speech player 11 and terminal display screen 10 input corresponding digital signal, and monitor that the overloaded vehicle situation that gives way sends the reset instruction of vehicle pass-through obstruction device so that determine whether to the terminal Control Driver, also move to GPRS communication system and GPRS thereof and patrol and examine 36 and transmit current overloaded vehicle multidate information, be convenient to the management and the monitoring of whole road network by GPRS module 6.
Described automobile dynamically weighing device 1, as Fig. 2 and shown in Figure 3, comprising: the first compression resistance spherical rubber air bag 13, the second compression resistance spherical rubber air bag 14, first pressure transducer 15, second pressure transducer 16, first signal-transmitting cable 17, secondary signal transmission cable 18, valve cock 19, upward pressure supporter 20, downforce supporter 21, upload compressed steel plate 22, download compressed steel plate 23.The first compression resistance spherical rubber air bag 13, the second compression resistance spherical rubber air bag 14 respectively glueds joint a pressure support body with equal sectional area up and down, be called upward pressure supporter 20 and downforce supporter 21, upward pressure supporter 20 and downforce supporter 21 again respectively with upload compressed steel plate 22, it is fastening to download 23 welding of compressed steel plate, the first compression resistance spherical rubber air bag 13, the upper section of the second compression resistance spherical rubber air bag 14 respectively encapsulates first pressure transducer 15 and second pressure transducer 16 and valve cock 19 thereof, first pressure transducer 15 is connected to the first input end of analog signal mouth of data acquisition module by first signal-transmitting cable 17, and second pressure transducer 16 is connected to the second input end of analog signal mouth of data acquisition module by secondary signal transmission cable 18.Because the contact area between upward pressure supporter and the compression resistance spherical rubber air bag is fixed, therefore the automotive wheels piezoelectricity gas simulating signal of pressure transducer output is multiplied by the gravity that can directly obtain tested wheel behind lifting surface area and the coefficient, and then carries formula according to axle and calculate current axletree and carry.To the dynamic weighing process of automobile, need not the travel speed and the attitude thereof of vehicle are proposed any requirement, according to axle carry, wheelbase and the wheel number of axle, utilize the complete vehicle weight mathematical model can accurately obtain gross combination weight again.
A described CCD camera 2 and the 2nd CCD camera 3 have disposed electronics and have regulated the aperture optical lens automatically, have therefore guaranteed under varying environment illumination, and the image of CCD output all has good brightness and resolution.
Described data acquisition module 3, comprise: the first input end of analog signal mouth, the second input end of analog signal mouth, the first picture signal input port, the second picture signal input port, A/D converter, image pretreater and output slot, wherein, two input end of analog signal mouths are respectively in order to receive two automotive wheels piezoelectricity gas simulating signals that pressure transducer is exported through two signal-transmitting cables in the automobile dynamically weighing device, the output terminal of analog input interface is connected to the input end of A/D converter, A/D converter is responsible for analog signal conversion is become digital signal and inputs to the input end of signal processor through the output slot, the picture signal input port is in order to accept the picture signal from the output of CCD camera, the first picture signal input port receives a CCD camera collection image, the second picture signal input port receives the 2nd CCD camera collection image, the output terminal of image input port is connected to the input end of image pretreater, the image pretreater is to being decoded and analog to digital conversion by the images acquired signal, and the output signal of image pretreater inputs to the input end of signal processor through the output slot.
Described signal processor 5 comprises: image processing module, numerical evaluation module and control module.Described image processing module, the automobile side angle image is carried out outline line to be extracted, the identification vehicle wheel number of axle, wheel diameter and wheel shaft pixel coordinates from the image that a CCD camera 2 is gathered, the identification overloaded vehicle situation that gives way from the image that the 2nd CCD camera 3 is gathered.Described numerical evaluation module, also carry out the digital value that addition obtains ui with what automobile dynamically weighing device 1 transmitted through data acquisition module 4 digitized two automobile wheel load signals, carrying formula according to axle then calculates current axletree and carries, calculate wheel distance between axles by the wheel shaft pixel coordinates, carry, take turns the number of axle and spacing is calculated gross combination weight according to axle again, registration of vehicle overload information; In signal processor 5, set up bridge actual bearer capability standard, and reception road network Surveillance center monitors standard by the bridge actual bearer capability standard modified value that the GPRS communication system transmits with the real-time update bridge load limit, tested vehicle gross weight and axle carried with bridge is maximum allow gross combination weight and maximumly allow axle to carry to compare respectively, the normally current number of record vehicle on the same day, found overloaded vehicle number, the normally current number of accumulative total vehicle and overloaded vehicle number.Described control module, the information translation that will overload is that steering order sends to terminal Control Driver 8, steering order comprises instruction of Don't Exceed Weight Limit vehicle pass-through and the reset instruction of vehicle pass-through obstruction device, and described reset instruction is that the access bridge inlet recovers the monitored instruction under the normally current state of vehicle; To terminal speech player 11 output audio digital signals, to terminal display screen 12 output display message, through the GPRS module to the GPRS communication system and move and to patrol and examine mutual monitor message, when recognition result confirms that overloaded vehicle is from dredging after the track gives way, send the reset instruction of vehicle pass-through obstruction device to terminal Control Driver 8, otherwise, continue to send information warning by terminal speech player 11 and terminal display screen 12 to overloaded vehicle, and ask to move and patrol and examine assistance.
Described GPRS module 6, as shown in Figure 4, comprise: GPRS chip 24, SIM card 25, single-chip microcomputer 26, growth data storer 27, RS232 interface 28, single-chip microcomputer 26 adopts MSC1210, be mainly used in the message pick-up and the transmission of control GPRS chip 24, and carry out data communication by standard RS232 serial ports 28 and signal processor 5, realize interrupting with software simultaneously, to finish data forwarding.
Described GPRS communication main body 7, as shown in Figure 5, comprise: transmit/receive antenna 29, GPRS serving GPRS support node 30, GPRS backbone network 31, gateway support node 32, the Internet 33, road network monitoring central server 34, on the logical cordless communication network GSM basis of original numeral, introduce two new network nodes: GPRS serving GPRS support node 30 and gateway support node 32, GPRS serving GPRS support node 30 and single-chip microcomputer 26 are in same hierarchy level, and the storage unit of following the tracks of single-chip microcomputer 26 realizes security function and Access Control, and be connected to base station system by frame relay, gateway support node 32 is supported the intercommunication with external packet-switched networks, and is communicated with via GPRS backbone network 31 and GPRS serving GPRS support node 30.The GPRS terminal obtains data by interface from signal processor 5, GPRS integrated data after the processing sends to the GSM base station, integrated data is after 30 encapsulation of GPRS serving GPRS support node, support that by GPRS backbone network 31 and gateway contact 32 communicates, 33 pairs of integrated datas of gateway support node are handled accordingly, re-send to the purpose network, as Internet or network X.25.If integrated data is to send to another GPRS terminal, then generally data are sent to GPRS serving GPRS support node 30 by GPRS backbone network 31, send to the GPRS terminal through transmit/receive antenna 29 again, GPRS communication main body 7 constitutes complete gprs system with each GPRS terminal.
Described road network monitoring central server 34 comprises: the telecommand under definite and correction, overloaded vehicle data statistics and analysis, the special circumstances (comprising war preparedness, fire-fighting, bridge maintaining etc.) of monitored bridge load limit standard sends three big modules.First module is determined the bridge load limit standard value according to bridge actual bearer ability, and is sent to the signal processor of monitor terminal by the GPRS communication system, and the bridge load limit standard is revised, upgraded; Second module, by receiving the overloaded vehicle Data Dynamic information that each monitor terminal takes place, carry out data statistics and analysis for the management decision layer, so as to promote the bridge design level and road and bridge the monitoring technique level, comprise the terminal data image signal in the multidate information that is received; Three module, in case special circumstances take place, road network monitoring central server 34 is directly assigned telecommand to the monitoring terminal by signal processor, the hard closing bridge.
Described terminal Control Driver 8, when signal processor 5 is judged current overload of vehicle, promptly to the input port of terminal Control Driver 8 is exported digital control instruction, terminal Control Driver 8 becomes simulating signal with digital control instruction transformation and after power amplification, drive terminal electric transmission 9, and then drive vehicle pass-through obstruction device 10 stops vehicle pass-throughs, confirm overloaded vehicle from dredging after the track gives way when signal processor, the terminal Control Driver accurately receives the vehicle pass-through obstruction device reset instruction of signal processor output.
Described terminal speech player 11, comprise: digital input interface, D/A converter, audio amplifier circuit and loudspeaker, the output digital signal of digital input interface received signal processor 5, its outlet is connected to the input end of D/A converter, the output terminal of D/A converter is connected to the input end of note amplifier, and the output terminal of note amplifier is connected to the input end of loudspeaker.Terminal speech player 11 with terminal display screen 12 all at signal processor 5 when terminal Control Driver 8 is sent steering order, receive digital signal corresponding, at this moment, the former promptly to current vehicle with voice suggestion clearly: " current vehicle surpassed the place ahead bridge allow current dead weight capacity * * %, please give way for other vehicle by dredging the track! " latter then expresses on screen: the place ahead bridge allows current axle to carry with the actual axle of gross weight and current vehicle to carry and data message such as gross weight.
When vehicle enters bridge access bridge inlet:
(1) by be embedded in the automobile dynamically weighing device of inlet on the road surface along with automobile advance one by one that sensing goes out automotive wheels piezoelectricity gas simulating signal, and in real time it is delivered to the input end of analog signal mouth of data acquisition module;
(2) the one CCD camera collection automobile side angle images, the 2nd CCD camera collection vehicle is dredged the situation map picture that gives way, and image analoging signal is exported to first, second picture signal input port of data acquisition module respectively through the vision cable line;
(3) data acquisition module is a digital signal with each automotive wheels piezoelectricity gas analog signal conversion, to being decoded and analog to digital conversion, above-mentioned pretreated digital signal is walked abreast through the output slot input to the input end of signal processor subsequently by the images acquired signal;
(4) signal processor runs image processing, numerical evaluation and control output three big operational modules, finish automobile side angle image outline line drawing, the identification of the vehicle wheel number of axle, the wheel shaft distance computation, the automobile axle carries with gross combination weight and calculates, at last whether current truck is allowed current decisioing making, and determine whether to export steering order;
(5) when tested automobile overload, export steering order by the control output end mouth of signal processor to the terminal Control Driver immediately, the terminal Control Driver converts the digital controlled signal that receives to simulating signal, through power amplification rear drive terminal electric transmission, under the mechanical force moment effect of terminal electric transmission, the current obstruction device of unlocking vehicle stops the overload automobile to pass through, and to terminal speech player and terminal display screen output signal, show to inform current overloaded vehicle by voice and literal, simultaneously, monitor whether overloaded vehicle gives way from dredging the track, otherwise, continue to send information warning by terminal speech player and terminal display screen to overloaded vehicle, and request priming inspector assists, when confirming overloaded vehicle from dredging after the track gives way, signal processor sends the reset instruction of vehicle pass-through obstruction device to the terminal Control Driver;
(6) meanwhile, signal processor is through the GPRS module, moved to road network monitoring central server and GPRS by the GPRS communication system and patrols and examines 36 to carry out monitor message mutual.
Under the automatic monitoring of the technology of the present invention, can accurately detect the vehicle actual axle in the access bridge porch carries and gross weight, surpassed the vehicle that 120kN or gross weight exceed 300kN in every year, system clearly informs overload information, forbids its current the place ahead bridge it, and guide it to enter to dredge the track, by the GPRS communication system overloaded vehicle information delivery road network Surveillance center and GPRS are moved simultaneously and patrol and examine 36, the discriminating accuracy of whole monitor procedure reaches 100%, has therefore effectively ensured the current safety and the The coast is clear of bridge.
Claims (10)
1, a kind of bridge load limit automatic monitoring system, it is characterized in that, comprise: the automobile dynamically weighing device, two CCD cameras, data acquisition module, signal processor, the GPRS module, the GPRS main body of communicating by letter, the terminal Control Driver, the terminal electric transmission, the vehicle pass-through obstruction device, the terminal speech player, terminal display screen, wherein: described automobile dynamically weighing device is used for the pressure of sensing automotive wheel to ground, the detected wheel load electric simulation of sensing signal is output the input end of analog signal mouth to data acquisition module, the one CCD camera is used for the collection to automobile side angle wheel and wheel shaft pitch image, the 2nd CCD camera is used to monitor that overloaded vehicle dredges the situation of giving way, two CCD cameras export the image that collects to the picture signal input port of data acquisition module, data acquisition module by with the output/input slot of signal processor with the pressure on the number signal and the parallel signal processor that is delivered to of data image signal that collect, signal processor accurately obtains current automobile after operation image identification and numerical evaluation module axle carries and two important assessment parameters of gross weight, and judge in view of the above whether current vehicle exceeds the bridge load limit standard, when overloading does not appear in automobile, automobile is normally current not to be affected, when automobile overload, export steering order by the control output end mouth of signal processor to the terminal Control Driver immediately, the terminal Control Driver converts the digital controlled signal that receives to analog drive signal, after power amplification, export electric transmission to as its electric driving power signal enabling terminal electric transmission, under the mechanical force moment effect of terminal electric transmission, the current obstruction device of unlocking vehicle passes through to stop the overload automobile, simultaneously, signal processor is to terminal speech player output audio digital signals, by the terminal speech player to current vehicle voice bulletin overload condition, forbid that it passes through the place ahead bridge, signal processor is to terminal display screen output character shows signal, by terminal display screen to current Warning for vehicle overload data message, and monitor that the overloaded vehicle situation that gives way sends the reset instruction of vehicle pass-through obstruction device so that determine whether to the terminal Control Driver, signal processor transmits through RS232 interface input GPRS module monitor message to the GPRS communication system, make the GPRS communication system grasp the master data data of bridge load limit monitoring in real time, the GPRS module that the GPRS communication system sends to corrected bridge load limit standard monitor terminal in real time according to the evaluation and the test result of bridge actual bearer ability, through RS232 interface entering signal processor, realize of the remote monitoring of GPRS communication system again to all monitor terminals.
2, bridge load limit automatic monitoring system according to claim 1, it is characterized in that, described automobile dynamically weighing device, comprise: the first compression resistance spherical rubber air bag, the second compression resistance spherical rubber air bag, first pressure transducer, second pressure transducer, first signal-transmitting cable, the secondary signal transmission cable, valve cock, the upward pressure supporter, the downforce supporter, upload the compressed steel plate, download the compressed steel plate, the first compression resistance spherical rubber air bag, the second compression resistance spherical rubber air bag respectively glueds joint a pressure support body with equal sectional area up and down, be called upward pressure supporter and downforce supporter, upward pressure supporter and downforce supporter again respectively with upload the compressed steel plate, it is fastening to download the welding of compressed steel plate, the first compression resistance spherical rubber air bag, the upper section of the second compression resistance spherical rubber air bag respectively encapsulates first pressure transducer and second pressure transducer and valve cock thereof, first pressure transducer is connected to the first input end of analog signal mouth of data acquisition module by first signal-transmitting cable, and second pressure transducer is connected to the second input end of analog signal mouth of data acquisition module by the secondary signal transmission cable.
3, bridge load limit automatic monitoring system according to claim 2, it is characterized in that, pressure when the compression resistance spherical rubber air bag in the described automobile dynamically weighing device is experienced automobile by bridge monitoring inlet, and the pressure experienced in time is delivered to pressure transducer in the cavity volume of sealing, conversion of signals through sensor, the output port of pressure transducer have one with the output of the linear wheel load electric simulation signal of pressure, the wheel load electric simulation signal of two pressure transducers is by parallel two input ports that export data acquisition module to of two signal-transmitting cables, contact area between upward pressure supporter in the automobile dynamically weighing device and the compression resistance spherical rubber air bag is fixed, according to the relation between gravity and the pressure, pressure is multiplied by the gravity that active area promptly obtains tested wheel.
4, bridge load limit automatic monitoring system according to claim 1 is characterized in that, described signal processor comprises: image processing module, numerical evaluation module and control module, wherein:
Described image processing module, the automobile side angle image is carried out outline line to be extracted, the identification vehicle wheel number of axle, wheel diameter and wheel shaft pixel coordinates from the image of a CCD camera collection, the identification overloaded vehicle situation that gives way from the image of the 2nd CCD camera collection;
Described control module, the information translation that will overload is that steering order sends to the terminal Control Driver, steering order comprises instruction of Don't Exceed Weight Limit vehicle pass-through and the reset instruction of vehicle pass-through obstruction device, and described reset instruction is that the access bridge inlet recovers the monitored instruction under the normally current state of vehicle; Control module is to terminal speech player output audio digital signals, to terminal display screen output display message, through the GPRS module to the GPRS communication system and move and to patrol and examine mutual monitor message, when recognition result confirms that overloaded vehicle is from dredging after the track gives way, send the reset instruction of vehicle pass-through obstruction device to the terminal Control Driver, otherwise, continue to send information warning by terminal speech player and terminal display screen to overloaded vehicle, and ask to move and patrol and examine assistance.
5, according to claim 1 or 4 described bridge load limit automatic monitoring systems, it is characterized in that, described terminal speech player, comprise: input interface, D/A converter, audio amplifier circuit and loudspeaker, the output digital signal of input interface received signal processor, its outlet is connected to the input end of D/A converter, the output terminal of D/A converter is connected to the input end of note amplifier, the output terminal of note amplifier is connected to the input end of loudspeaker, after the terminal speech player is received audio digital signals, convert thereof into analog voice signal through D/A converter, through the power amplification of audio amplifier circuit, finally export the complete semanteme of loudspeaker plays to, when tested carload lot transfinites again, be subjected to Don't Exceed Weight Limit vehicle pass-through instruction control, the terminal speech player is to the voice suggestion clearly of current vehicle.
6, according to claim 1 or 3 described bridge load limit automatic monitoring systems, it is characterized in that, described terminal display screen, under normal current state, show the bridge load limit standard, when signal processor judges that current overload of vehicle is limited to pass through,, promptly on terminal display screen, increase current overload of vehicle data message to the input interface input characters shows signal of terminal display screen.
7, bridge load limit automatic monitoring system according to claim 1, it is characterized in that, described data acquisition module, comprise: the first input end of analog signal mouth, the second input end of analog signal mouth, the first picture signal input port, the second picture signal input port, A/D converter, seven parts of image pretreater and output slot are formed, wherein, two input end of analog signal mouths are respectively in order to receive two automotive wheels piezoelectricity gas simulating signals that pressure transducer is exported through two signal-transmitting cables in the automobile dynamically weighing device, the output terminal of analog input interface is connected to the input end of A/D converter, and A/D converter is responsible for analog signal conversion is become digital signal and inputs to the input end of signal processor through the output slot; The picture signal input port is in order to accept the picture signal from the output of CCD camera, wherein, the first picture signal input port receives a CCD camera collection image, the second picture signal input port receives the 2nd CCD camera collection image, the output terminal of image input port is connected to the input end of image pretreater, the image pretreater is to being decoded and analog to digital conversion by the images acquired signal, and the output signal of image pretreater inputs to the input end of signal processor through the output slot.
8, bridge load limit automatic monitoring system according to claim 1, it is characterized in that, described GPRS communication main body, comprise: transmit/receive antenna, the GPRS serving GPRS support node, the GPRS backbone network, gateway support node, the Internet, the road network monitoring central server, on the logical cordless communication network GSM basis of original numeral, introduce two new network nodes: GPRS serving GPRS support node and gateway support node, GPRS serving GPRS support node and single-chip microcomputer are in same hierarchy level, and the storage unit of following the tracks of single-chip microcomputer realizes security function and Access Control, and be connected to base station system by frame relay, gateway support node is supported the intercommunication with external packet-switched networks, and via GPRS backbone network and the connection of GPRS serving GPRS support node, the GPRS terminal obtains data by interface from signal processor, GPRS integrated data after the processing sends to the GSM base station, integrated data is after the encapsulation of GPRS serving GPRS support node, support that by GPRS backbone network and gateway contact communicates, gateway support node is handled accordingly to integrated data, re-send to the purpose network, if integrated data is to send to another GPRS terminal, then generally data are sent to the GPRS serving GPRS support node by the GPRS backbone network, send to the GPRS terminal through transmit/receive antenna again, GPRS communication main body and each GPRS terminal constitute complete gprs system.
9, bridge load limit automatic monitoring system according to claim 8, it is characterized in that, described road network monitoring central server, comprise: the determining with correction, overloaded vehicle data statistics and analysis and comprise telecommand transmission three big modules under war preparedness, fire-fighting, the bridge maintaining situation of monitored bridge load limit standard, wherein:
Determine and the correcting module of described monitored bridge load limit standard are determined monitored bridge load limit standard value according to the data that bridge actual bearer ability rating method is obtained, and be sent to the signal processor of bridge monitor terminal 35 by the GPRS communication system, the bridge load limit standard is provided with or revises renewal, and bridge actual bearer ability rating method comprises: based on empirical method, loading test method, the design theory method of real bridge investigation;
Described overloaded vehicle data statistics and analysis module receive the overloaded vehicle Data Dynamic information that each monitor terminal takes place, carry out data statistics and analysis for the management decision layer, so that promote the bridge design level and road and bridge the monitoring technique level, comprise the terminal data image signal in the multidate information that is received;
Described telecommand sending module, in case war preparedness, fire-fighting, bridge maintaining special circumstances take place, the GPRS communication system can directly be assigned telecommand to the monitoring terminal by signal processor, carries out the mandatory control of bridge traffic.
10, bridge load limit automatic monitoring system according to claim 1, it is characterized in that, described terminal Control Driver becomes simulating signal with digital control instruction transformation and after power amplification, drive the terminal electric transmission, and then drive vehicle pass-through obstruction device stops vehicle pass-through, confirm overloaded vehicle from dredging after the track gives way when signal processor, the terminal Control Driver accurately receives the vehicle pass-through obstruction device reset instruction of signal processor output;
The electric power signal that described terminal electric transmission will be imported is converted into mechanical force moment, starts the vehicle pass-through obstruction device and stops overloaded vehicle current, and perhaps, the vehicle pass-through obstruction device resets, and recovers the monitoring under the normally current state of vehicle;
Described vehicle pass-through obstruction device is a kind of crossbar type mechanical rotating mechanism, is subjected to Don't Exceed Weight Limit vehicle pass-through instruction control, and the vehicle pass-through obstruction device is under the promotion of the terminal electric transmission arm of force, and smooth rotation falls, and is horizontally placed in the middle of the track; Controlled by the reset instruction of vehicle pass-through obstruction device, the vehicle pass-through obstruction device is under the pulling of the terminal electric transmission arm of force, and smooth rotation rises, perpendicular placing by the track.
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| CNB2007100473984A CN100483279C (en) | 2007-10-25 | 2007-10-25 | Bridge load limit automatic monitoring system |
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| CN101532917B (en) * | 2009-04-15 | 2011-08-03 | 江苏省交通科学研究院股份有限公司 | Quick load test method for bridge carrying capacity |
| CN104501930B (en) * | 2014-12-24 | 2017-01-25 | 北京万集科技股份有限公司 | Integrated anti-cheating dynamic weighing method and system |
| CN106908129B (en) * | 2017-03-29 | 2023-04-21 | 华南理工大学 | Intelligent regional vehicle overweight detection and early warning system and method |
| SE541394C8 (en) * | 2017-12-22 | 2019-12-03 | Scania Cv Ab | Method and a control arrangement for controlling vehicle operation comprising axle load control of at least one vehicle during vehicle operation |
| CN108257391A (en) * | 2018-01-17 | 2018-07-06 | 成都上甲光电科技有限公司 | Current indicator based on bridge |
| CN108360400B (en) * | 2018-03-06 | 2020-11-10 | 义乌市凡特塑料制品有限公司 | Intelligent repair system based on sea-crossing bridge |
| CN109325064B (en) * | 2018-10-11 | 2021-08-20 | 广东赛诺科技股份有限公司 | Method and device for judging abnormal conditions of vehicle axle data |
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