CN103850241A - Earth and rockfill dam milling excitation frequency and excitation force real-time monitoring system and monitoring method - Google Patents
Earth and rockfill dam milling excitation frequency and excitation force real-time monitoring system and monitoring method Download PDFInfo
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Abstract
The invention belongs to the field of earth and rockfill dam construction quality control, and belongs to a method for carrying out remote real-time monitoring and subsequent quality assessment on the milling machine excitation frequency and the excitation force. Therefore the method adopts the technical scheme that an earth and rockfill dam milling excitation frequency and excitation force real-time monitoring system and monitoring method comprises he following steps that vibration acceleration signals in the vertical direction of a milling wheel are collected in real time in the process of milling earth and rockfill dam materials by using a milling machine excitation frequency testing module arranged on a part which is arranged on a milling machine vibration wheel and does not rotate along with the vibration wheel, the frequency spectrum data of the vibration acceleration of the milling wheel is obtained through signal analog-to-digital conversion and fast Fourier transformation (FFT), a corresponding relationship among the excitation frequency, the excitation force and the milling machine position coordinates is built according to the same sampling moment, whether the excitation frequency and the excitation force of a milling machine at the current moment conform to the design standard or not is judged, and if the excitation frequency and the excitation force do not reach the standard, warning is sent. The method provided by the invention is mainly applied to the earth and rockfill dam construction quality control.
Description
Technical field
The invention belongs to rock fill dam construction field of quality control, particularly relate to a kind of earth and rockfill dam and roll rolling machine excited frequency and exciting force real-time monitoring system and method for supervising thereof in process.
Background technology
In rock fill dam construction process, effectively controlling and rolling parameter is the consolidation effect that reaches good, guarantees the key of dam construction quality.Excited frequency and exciting force, as the important parameter that rolls, not only directly affect the operating efficiency of rolling machine, and affect by the motion state of firming masonry dam material particle, and then affect consolidation effect.(DL/T5129-2001) stipulate according to " rolling earth-rock dam job specfication ", should make regular check on the service behaviour of rolling machine, the excited frequency of assurance rolling machine and exciting force are within acceptability limit.But in actual applications; the reason such as lubrication oil is too much or very few because rolling machine hydraulic pump efficiency is low, in starting of oscillation defective valve, engine speed shakiness and vibrating wheels; rolling machine excited frequency and exciting force usually there will be anomaly, do not reach design and code requirement.Therefore, be necessary rolling machine excited frequency and exciting force in the process of rolling to carry out on-line monitoring, the consolidation effect of face dam, the storehouse material of guaranteeing to construct, this is for guaranteeing that dam construction quality tool is of great significance.
At present, aspect rock fill dam construction Real-time quality monitoring, the placement grinding Real-time quality monitoring system of the development such as Zhong Denghua
[1-3](2 of the patents that is authorized: ZL200910069245.9, ZL200910069167.2), realize the real-time monitoring that road speed, number of rolling, exciting force state, compacted depth etc. is rolled to parameter, for guaranteeing that earth and rockfill dam compaction quality has played important function.But the rolling machine vibration parameters that this system is monitored is exciting force state, it is the output state of rolling machine vibration, generally have that high frequency lowly shakes, low frequency Gao Zhen, depressed etc. three kinds, and unrealized excited frequency to rolling machine reality and exciting force output monitors in real time, thereby cannot objectively respond the mechanical efficiency of rolling compaction machine to dam material compacting.
At present, both at home and abroad for the more existing correlative studys of rolling machine excited frequency monitoring device.As Technique of BOMAG Company Germany-based, Geodynamik company of Switzerland and Caterpillar company of the U.S. etc.
[4-6]the rolling machine of producing is all provided with vibration frequency gauge table, can show the vibration frequency of current rolling machine in real time rolling machine operator; Zhang Runli
[7]deng having developed Continuous Tester for Compactness of Vibratory Compactors, can be in monitoring soil body relative compaction, for the mensuration of rolling machine vibration frequency; Xu Guanghui
[8]deng by CPMC system monitoring vibration frequency; Yang Jian
[9]the vehicle loaded densification degree detector of exploitation can show the vibration frequency of rolling machine on indication dial plate; Ning Jialin
[10]deng to actual measurement acceleration carry out computing, analyze after, can obtain degree of compaction, the road roller speed of service, vibration frequency etc.; Si Chuan lookout industrial automatic control technology Co., Ltd
[11]deng research and development intelligent detector for compaction quality---ICCC detector has been realized the detection continuous to compaction quality, vibration frequency and rolling speed.Although above-mentioned these devices can be realized rolling machine vibration frequency Real-Time Monitoring, but can not monitor the exciting force of the actual output of rolling compaction machine, and its main service object operator that is rolling machine, and domestic main person responsible for rock fill dam construction quality control is management, construction manager and owner.Obviously, owing to the data of Real-Time Monitoring cannot being carried out to teletransmission and subsequent applications, therefore existing these technology or device cannot be realized owner, management and the construction party administrative staff on-line synchronous control to rolling machine excited frequency and exciting force.In addition, these technology of domestic-developed or the excited frequency that device is surveyed are not corresponding with the earth absolute coordinate, so be difficult for obtaining excited frequency particular location not up to standard in practice of construction, be not easy to related management personnel construction quality is carried out to FEEDBACK CONTROL.
List of references:
[1] Zhong Denghua, Liu Donghai, Cui Bo. high core wall rockfill dam rolls Real-time quality monitoring application [J]. Chinese science: science and technology, 2011,41(8): 1028-1034
[2] Zhong Denghua, Liu Donghai, Zhang Sherong etc. real-time monitoring method for construction quality of core rockfill dam [P], patent of invention ZL200910069245.9,2010
[3] Zhong Denghua, Liu Lei, Liu Donghai etc. automatic information collecting device during rolling process of corewall rock-fill dam [P], patent of invention ZL200910069167.2,2010
[4] BOMAG.BOMAG training on maintenance handbook: BW216 219 226DH/PDH-4[EB/OL] .http: //www.doc88.com/p-90522898830.html, 2005-08
[5]Briaud?J?L,Seo?J.Intelligent?compaction:overview?and?research?needs[J].Report?to?the?Federal?Highway?Administration,2003
[6]Caterpillar.CS44Vibratory?Soil?Compactors:VIBRATIONS?PER?MINUTE(VPM)GAUGE[EB/OL].http://xml.catmms.com/servlet/ImageServlet?imageId=C731175
[7] Zhang Runli, a person of outstanding talent, Li Xishan etc. Continuous Tester for Compactness of Vibratory Compactors [J]. engineering machinery, 2000,32(8): 4-6
[8] Xu Guanghui, Gao Hui, king sage. Continuous Dynamic Monitor Technology on Subgrade Compaction Quality [J]. Chinese Highway journal, 2007,3(20): 17-22
[9] Yang Jian. vehicle loaded densification degree detector [P]. China, utility model patent, 01249239.6.2002-10-23
[10] Ning Jialin, Cao Yuanwen. a kind of novel Compaction Degree Continuous Measure [J]. Traffic Institutes Of Chongqing's journal, 2007,26(1): 74-77
[11] four river lookout industrial automatic control technology Co., Ltds. roadbed compactedness detecting instrument [P]. Chinese patent: ZL201020584464.9,2010
[12] Liu Donghai, Wang Aiguo. a kind of Earth and Rockfill Dam material compaction quality real-time monitoring device [P]. Chinese patent: application number 201310036698.8,2013
Summary of the invention
For overcoming the deficiencies in the prior art, in earth and rockfill dam roller compaction construction process, rolling machine excited frequency and exciting force are carried out to remote real-time monitoring, can realize rolling machine excited frequency and exciting force alarm time not up to standard, construct in order to guide field; And the rolling machine excited frequency of Real-Time Monitoring and exciting force data can be sent to database storage, for subsequent quality evaluate application, realize rolling machine operator, owner, management and construction party administrative staff to rolling overall process management by synchronization and the real-time feedback control of quality.For this reason, the technical solution used in the present invention is, earth and rockfill dam rolls excited frequency and exciting force method for real-time monitoring, comprise the steps: to utilize the rolling machine excited frequency being arranged in rolling machine vibrating wheels and on the position of not rotating with vibrating wheels to measure module, earth and rockfill dam material is rolled in process, the vibration acceleration signal of Real-time Collection muller vertical direction, process signal mode number conversion and Fast Fourier Transform (FFT) FFT obtain the frequency spectrum data of muller vibration acceleration, wherein, fundamental frequency is the excited frequency of the actual output of rolling machine; Determine the position coordinates of current time rolling machine; By rolling machine excited frequency, and this rolling machine eccentric block quality and eccentricity, calculate the actual exciting force of rolling machine output, and identical according to sampling instant, excited frequency, exciting force and rolling machine position coordinates are mapped; Whether the excited frequency and the exciting force that judge current time rolling machine meet design standard, if not up to standard, send warning message.
The design formulas of exciting force F is as follows:
F＝Meω
2=Me4π
2f
0 2
In formula, M is eccentric block quality, and e is eccentric throw, generally given in rolling machine device parameter manual; f
0for the excited frequency monitoring, ω is angular frequency.
Utilize rolling machine excited frequency to measure acceleration transducer in module by the time domain simulation signal of enough little time interval continuous acquisition muller acceleration, by signal mode number conversion, be converted into time-domain digital signal, sampling time interval T meet under requirement of engineering precision, take fully enough little, at this moment analog signal f
a(t) just can represent by data signal, that is:
f（n）＝f
a（n·T）；
In formula, f(n) be n discrete digital signal; f
a(nT) be the continuous analog signal in nT moment; f
sit is sample frequency;
And then the rolling machine time-domain digital signal obtaining through analog-to-digital conversion is carried out to Fourier transformation, nonperiodic signal f(t) adopt Fourier transformation form to be expressed as:
In formula, f(ω) be called f(t) Fourier transformation, and
Through Fast Fourier Transform (FFT), rolling machine acceleration signal is decomposed into countless harmonic waves
stack, obtain thus the frequency spectrum data of muller vibration acceleration, comprise the various frequencies and the corresponding amplitude thereof that form vibration acceleration signal, wherein, fundamental frequency is the actual excited frequency f of rolling machine output
0.
Also comprise the following steps:
(1) utilize GPS locating module by being arranged on rolling machine driver's cabin top as far as possible near the gps satellite antenna of muller center position and the differential signal of difference wireless aerial reception gps satellite signal and GPS datum station, determine the position coordinates of current time rolling machine;
(2) utilize the integrated processing module of single-chip microcomputer being arranged in rolling machine driver's cabin by the rolling machine excited frequency receiving, and eccentric block quality and the eccentricity of this rolling machine calling from database and application server, calculate the actual exciting force of rolling machine output;
(3) data wireless transport module sends to database and application server system by current sampling instant and corresponding rolling machine position coordinates, excited frequency and exciting force data by GPRS network;
(4) database and application server system judge whether the actual excited frequency of rolling machine and exciting force meet design standard, if so, and execution step (6); If not, execution step (5);
(5) monitor in real time IE client transmission warning message by Internet network to excited frequency and exciting force; Or by GPRS(General Packet Radio Service, packet radio service technology) network sends warning message to quality control officer's hand-held PDA or mobile phone, vehicle carried mobile phone;
(6) excited frequency and exciting force are monitored IE client regular statistical summaries rolling machine excited frequency and exciting force situation in real time, and form form, as the foundation of relevant departments' quality examination and machine management.
Excited frequency and exciting force monitor in real time IE client start monitoring before, polarization quality and the eccentricity of the rolling machine work excited frequency of input standard and exciting force, rolling machine, and the attribute information (comprising numbering, unit in charge of construction, rolling machine configuring condition and the numbering thereof etc. of storehouse face) that will monitor working bin face is in database and application server.In monitor procedure, can show in real time the current location of rolling machine, and actual excited frequency and the exciting force of output, receive excited frequency or exciting force warning message not up to standard that PDA or mobile phone alarm module send; Simultaneously, can realize and roll the rolling machine excited frequency of any time optional position, region and the inquiry of exciting force, and can statistical summaries rolling machine excited frequency and the monitoring situation of exciting force, form form and report relevant departments, the auxiliary material that check as subsequent quality.
Earth and rockfill dam rolls excited frequency and exciting force real-time monitoring system, comprises rolling machine excited frequency mensuration module, the integrated processing module of single-chip microcomputer, car-mounted display module;
Rolling machine excited frequency is measured module and is arranged in rolling machine vibrating wheels and the position of not rotating with vibrating wheels, for the process of at rolling machine, earth and rockfill dam being carried out compacting, the vibration acceleration signal of Real-time Collection muller vertical direction, process signal mode number conversion and Fast Fourier Transform (FFT) FFT obtain the frequency spectrum data of muller vibration acceleration, then current demand signal acquisition time and rolling machine excited frequency transfer of data are arrived to the integrated processing module of single-chip microcomputer; The rolling machine excited frequency that the integrated processing module utilization of single-chip microcomputer receives, and this rolling machine eccentric block quality and eccentricity of from database and application server, calling, calculate the actual exciting force of rolling machine output; Send data wireless transport module DTU and car-mounted display module to; Car-mounted display module is arranged in rolling machine driver's cabin, shows in real time current sampling time, rolling machine position coordinates, excited frequency and exciting force, according to demonstration information, adjusts in time the running parameter of rolling machine for operator.
Also comprise: GPS locating module, data wireless transport module DTU, database and application server system;
GPS locating module comprises GPS receiver, gps satellite antenna and difference wireless aerial; Gps satellite antenna and difference wireless aerial are arranged on to rolling machine driver's cabin top as far as possible near the position of muller central point, by receiving the differential signal of gps satellite signal and GPS datum station, determine the position coordinates of sampling instant rolling machine, and send sampling instant and corresponding rolling machine position coordinate data thereof to single-chip microcomputer integrated processing module;
Data wireless transport module (DTU), sends to remote data base application server in real time for the data that integrated single-chip microcomputer processing module is sent;
The current sampling time that database and application server system receive and storage data wireless transport module sends, and corresponding rolling machine position coordinates, excited frequency and exciting force data, and judge rolling machine excited frequency and exciting force whether up to standard, if not up to standard, send warning message by Internet, GPRS.
Technical characterstic of the present invention and beneficial effect:
(1) can avoid defective because of the decline excited frequency or the exciting force that cause of operator misoperation or rolling machine mechanical performance, and then affect the situation of earth and rockfill dam consolidation effect and compacting operation efficiency.
(2) can show in real time current sampling time, rolling machine position coordinates, excited frequency and exciting force, guiding operator is adjusted rolling machine excited frequency and is compacted the suitable of material situation and mates with current, guarantees that compacting operation carries out all the time under the requirement of setting.
(3) can carry out remote alarms to excited frequency not up to standard or exciting force, what realization " driver-contractor-management-owner " overall process was synchronous, online, long-range rolls quality managemant, prevent that the one-sided quality in interference from human factor or job site from concealing, for guaranteeing that rock fill dam construction quality provides strong technical guarantee.
Accompanying drawing explanation
Fig. 1 earth and rockfill dam rolls the flow chart of excited frequency and exciting force method for real-time monitoring;
Fig. 2 earth and rockfill dam rolls excited frequency and exciting force real-time monitoring system composition diagram;
Fig. 3 earth and rockfill dam rolls the integration principle figure of excited frequency and exciting force real-time monitoring system.
The specific embodiment
The present invention further develops on patent " a kind of Earth and Rockfill Dam material compaction quality real-time monitoring device (the application number 201310036698.8) " basis in earlier application, and wherein the GPS locating module in the present invention, data wireless transport module (DTU) and rolling machine power module and earlier application (application number 201310036698.8) patent are similar, difference is, the patent of earlier application is mainly to utilize the muller acceleration process real-time monitoring to carry out the degree of compaction monitor value (CV) of computational representation earth and rockfill dam material compaction quality, and the present invention utilizes the muller acceleration process real-time monitoring to calculate the operating frequency of muller vibration, and then the exciting force of the actual output of calculating rolling machine, and then pass through wireless communication technique, Internet technology etc., realize overall process management by synchronization and the remote real_time control of the rolling machine operator-construction manager-management-owner to rolling machine excited frequency and these two parameters of exciting force.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
With reference to Fig. 1, in the present invention, earth and rockfill dam rolls excited frequency and exciting force method for real-time monitoring, comprises the following steps:
(1) according to design standard, engineering staff determines standard operation excited frequency and the exciting force of various model rolling machines, and all rolling machines are numbered, determine polarization quality and eccentricity that rolling machine is corresponding, then above-mentioned data are monitored to IE client in real time by excited frequency and exciting force and be input in database and application server;
(2) utilize the rolling machine excited frequency being arranged in rolling machine vibrating wheels and on the position of not rotating with vibrating wheels to measure module, earth and rockfill dam material is rolled in process, the vibration acceleration signal of Real-time Collection muller vertical direction, process signal mode number conversion and Fast Fourier Transform (FFT) (FFT) obtain the frequency spectrum data of muller vibration acceleration, wherein, fundamental frequency is the excited frequency of the actual output of rolling machine;
Acceleration transducer in rolling machine excited frequency mensuration module is by the time domain simulation signal of enough little time interval continuous acquisition muller acceleration, by signal mode number conversion, be converted into time-domain digital signal, sampling time interval T meet under requirement of engineering precision, take fully enough little, at this moment analog signal f
a(t) just can represent by data signal, that is:
f（n）＝f
a（n·T）；
In formula, f(n) be n discrete digital signal; f
a(nT) be the continuous analog signal in nT moment; f
sit is sample frequency;
And then the rolling machine time-domain digital signal obtaining through analog-to-digital conversion is carried out to Fourier transformation, nonperiodic signal f(t) adopt Fourier transformation form to be expressed as:
In formula, f(ω) be called f(t) Fourier transformation, and
Through Fast Fourier Transform (FFT), rolling machine acceleration signal is decomposed into countless harmonic waves
stack, obtain thus the frequency spectrum data of muller vibration acceleration, comprise the various frequencies and the corresponding amplitude thereof that form vibration acceleration signal, wherein, fundamental frequency is the actual excited frequency (f of rolling machine output
0);
(3) utilize GPS locating module by being arranged on rolling machine driver's cabin top as far as possible near the gps satellite antenna of muller center position and the differential signal of difference wireless aerial reception gps satellite signal and GPS datum station, determine the position coordinates of current time rolling machine;
(4) utilize the integrated processing module of single-chip microcomputer being arranged in rolling machine driver's cabin by the rolling machine excited frequency receiving, and eccentric block quality and the eccentricity of this rolling machine calling from database and application server, calculate the actual exciting force of rolling machine output;
The design formulas of exciting force F is as follows:
F＝Meω
2=Me4π
2f
0 2
In formula, M is eccentric block quality, and e is eccentric throw, generally given in rolling machine device parameter manual; f
0for the excited frequency monitoring, ω is angular frequency;
Then identical according to sampling instant, excited frequency, exciting force and rolling machine position coordinates are mapped;
(5) data wireless transport module sends to database and application server system by current sampling instant and corresponding rolling machine position coordinates, excited frequency and exciting force data by GPRS network;
(6) database and application server system judge whether the actual excited frequency of rolling machine and exciting force meet design standard, if so, and execution step (8); If not, execution step (7);
(7) monitor in real time IE client transmission warning message by Internet network to excited frequency and exciting force; Or by GPRS(General Packet Radio Service, packet radio service technology) network sends warning message to quality control officer's hand-held PDA or mobile phone, vehicle carried mobile phone;
(8) excited frequency and exciting force are monitored IE client regular statistical summaries rolling machine excited frequency and exciting force situation in real time, and form form, as the foundation of relevant departments' quality examination and machine management.
In sum, the embodiment of the present invention provides a kind of earth and rockfill dam to roll excited frequency and exciting force method for real-time monitoring, has realized the meticulous control to rolling machine excited frequency and exciting force, guarantees that excited frequency and exciting force meet design standard; Excited frequency not up to standard and exciting force situation are carried out to Realtime Alerts prompting, and form statistical report form, carry out the foundation of quality examination and machine management as relevant departments.
With reference to Fig. 2 and Fig. 3, in the present invention, earth and rockfill dam rolls excited frequency and exciting force real-time monitoring system, mainly comprise that rolling machine excited frequency measures module, GPS locating module, the integrated processing module of single-chip microcomputer, data wireless transport module (DTU), car-mounted display module, rolling machine power module, database and application server system, PDA or mobile phone alarm module (comprise the hand-held PDA of administrative staff or mobile phone alarm module, and vehicle carried mobile phone alarm module), excited frequency and exciting force and monitor in real time IE client;
Rolling machine excited frequency measure module to Real-time Collection to muller vertical direction vibration acceleration signal carry out signal mode number conversion and Fast Fourier Transform (FFT), the current collection moment obtaining and the excited frequency of the actual output of rolling machine are sent to the integrated processing module of single-chip microcomputer; GPS locating module utilizes real time dynamic differential technology to obtain the position coordinates of rolling machine, and sends current sampling instant and corresponding rolling machine position coordinates to single-chip microcomputer integrated treating device; The rolling machine excited frequency that the integrated processing module utilization of single-chip microcomputer receives, and the eccentric block quality of this rolling machine and eccentricity, calculate the actual exciting force of rolling machine output, identical according to sampling instant again, excited frequency, exciting force and rolling machine position coordinates are mapped, obtain excited frequency and the exciting force of any time optional position rolling machine, and send these data to data wireless transport module (DTU) and car-mounted display module; The integrated processing module of single-chip microcomputer is powered by rolling machine power module, and measures module, GPS locating module, data wireless transport module (DTU) and car-mounted display module for power supply to respectively rolling machine excited frequency by corresponding power interface; The current sampling instant that data wireless transport module (DTU) gets integrated single-chip microcomputer processing module by GPRS network and corresponding rolling machine position coordinates, excited frequency and exciting force data send to database and application server system, database and application server system judge whether the excited frequency of rolling machine and exciting force meet design standard, if not, monitor in real time IE client transmission warning message by Internet network to excited frequency and exciting force, and send warning message by GPRS network to PDA or mobile phone alarm module; Excited frequency and exciting force are monitored IE client in real time for receiving the rolling machine excited frequency of excited frequency or exciting force warning message not up to standard, any time optional position and the inquiry of exciting force, and the statistics of rolling machine excited frequency and exciting force monitoring situation, form form, the auxiliary material that check as subsequent quality.
One, rolling machine excited frequency is measured module
The present invention adopts U.S. ADI(Analog Device Instrument) company produce ADIS16227 acceleration transducer, its the highest sample frequency is 100.2KHZ, be applicable to the earth and rockfill dam material rolling machine that excited frequency is generally 20～60HZ, and meet requirement of engineering precision.Meanwhile, adopt the metal encapsulation of 15mm × 15mm × 15mm, be furnished with the screwed hole for installing.
Rolling machine excited frequency is measured module and is arranged on muller and the position (being generally without vibration damping wheel shaft place) of not rotating with muller, by the integrated processing module power supply of single-chip microcomputer (in the present invention, supply voltage is 3.3V).Acceleration transducer in this module, by the time domain simulation signal of enough little time interval continuous acquisition muller acceleration, by signal mode number conversion, is converted into the time-domain digital signal of being convenient to storage, transmission and analyzing and processing.Usually, sampling time interval T takes fully enough little (the present invention gets 2s), at this moment analog signal f meeting under requirement of engineering precision
a(t) just can represent by data signal, that is:
f（n）＝f
a（n·T）；
In formula, f(n) be n discrete digital signal; f
a(nT) be the analog signal in nT moment; f
sit is sample frequency.
Then, the rolling machine time-domain digital signal obtaining through analog-to-digital conversion is carried out to Fourier transformation.The acceleration signal of rolling machine vibrating wheels belongs to the nonperiodic signal of deterministic signal the inside, and the acceleration signal of rolling machine vibrating wheels can be regarded as to the cycle is infinitely-great periodic signal.Nonperiodic signal f(t) adopt Fourier transformation form to be expressed as:
In formula, f(ω) be called f(t) Fourier transformation, and
Fast Fourier Transform (FFT) (FFT) is constantly the DFT(Discrete Fourier Transform of long sequence, discrete Fourier transform) resolve into the DFT of several short sequences, and utilize the periodicity of twiddle factor and symmetry to reduce a kind of fast algorithm of the operation times of DFT.
Through Fast Fourier Transform (FFT), rolling machine acceleration signal is decomposed into countless harmonic waves
stack, obtain thus the frequency spectrum data (comprising the various frequencies and the corresponding amplitude thereof that form vibration acceleration signal) of muller vibration acceleration, wherein, fundamental frequency is the actual excited frequency (f of rolling machine output
0).Then, by SPI interface, by current sampling time and rolling machine excited frequency transfer of data to the integrated processing module of single-chip microcomputer.
Two, GPS locating module
GPS locating module comprises GPS receiver, gps satellite antenna and difference wireless aerial, gps satellite antenna and difference wireless aerial are arranged on to rolling machine driver's cabin top and as far as possible near the position of muller central point, can indicate as far as possible exactly muller position; GPS receiver is arranged in driver's cabin.In the present invention, GPS receiver adopts the R5 receiver that Tian Bao company of the U.S. produces.Gps satellite antenna reception gps signal, difference wireless aerial receives the differential signal of GPS datum station simultaneously, makes real time dynamic differential calculate (Real-time Kinematic, RTK) for GPS receiver.GPS receiver is by the enough little time interval (getting 1s in the present invention), the three-dimensional location coordinates of dynamic calculation rolling machine.Adopt this method, positioning precision can be brought up to Centimeter Level.This module is connected with the integrated processing module of single-chip microcomputer by RS-232 serial line interface, and current positioning time and corresponding rolling machine position coordinates thereof are transferred to the integrated processing module of single-chip microcomputer in real time.Meanwhile, this module is powered by the integrated processing module of single-chip microcomputer by power interface, and in the present invention, supply voltage is 16.8V.
Three, the integrated processing module of single-chip microcomputer
The present invention adopts the C8051F340 single-chip microcomputer of 51 kernels, mainly comprises central processing unit (CPU), FLASH memory, RAM memory, power interface, power transfer module and various data-interfaces etc.
The integrated processing module of single-chip microcomputer is the core component of native system power supply and data processing, integrated with hardware device by programming.This module is arranged in rolling machine driver's cabin, by rolling machine power module power supply (in the present invention, supply voltage is 16.8V).Then, after power transfer module transformation, respectively to CPU(Central Processing Unit, central processing unit), the unit power supply such as FLASH memory, RAM memory.Meanwhile, power transfer module changes into rolling machine excited frequency by input voltage and measures module, GPS locating module, data wireless transport module (DTU) and car-mounted display module required voltage separately, and the power interface by is separately to each module for power supply.
The integrated processing module of single-chip microcomputer receives rolling machine excited frequency by SPI interface and measures current sampling time and the rolling machine excited frequency that module transmits, and receive by RS-232 interface positioning time and the corresponding rolling machine position coordinates thereof that GPS locating module sends in real time, then these data are put into FLASH memory and carry out buffer memory, RAM memory is used for interim storage data.After buffer memory, these data send to CPU(Central Processing Unit, central processing unit by the mode of " stack "), according to the rolling machine excited frequency obtaining, calculate in real time exciting force F by CPU, design formulas is as follows:
F＝Meω
2=Me4π
2f
0 2
In formula, M is eccentric block quality, and e is eccentric throw, generally given in rolling machine device parameter manual; f
0for the excited frequency monitoring.
Then,, according to the current time of rolling machine excited frequency sampling, determine the rolling machine position coordinates in the corresponding moment of being measured by GPS locating module, and itself and excited frequency, exciting force are mapped one by one.Finally, the current sampling time after correspondence, rolling machine position coordinates, excited frequency and exciting force are transferred to car-mounted display module and data wireless transport module (DTU) by RS-232 interface respectively.
Four, data wireless transport module
Data wireless transport module (DTU) is arranged in rolling machine driver's cabin, by the integrated processing module power supply of single-chip microcomputer (in the present invention, supply voltage is 12V), again by the power transfer module transformation in this module, respectively to the CPU(Central Processing Unit in this module, central processing unit), the unit power supply such as FLASH memory, RAM memory.
Data wireless transport module is put into FLASH memory after receiving by RS-232 interface the data that the integrated processing module of single-chip microcomputer transmits, then by buffer memory, data is sent to CPU in the mode of " stack ".Wherein, RAM memory is used for interim stored data.Then, CPU carries out IP(Internet Protocol to data, the agreement interconnecting between network) change, and give GSM(Global System of Mobile communication, global system for mobile communications IP packet) communication module.GSM communication module is according to the ICP/IP protocol of customization, by certain time interval (as 2s), by current sampling time, rolling machine position coordinates, excited frequency and exciting force data by GPRS(General Packet Radio Service, packet radio service technology) network sends to remote data base and application server.Wherein, gsm module can adopt Siemens MC 39i or the GTM900b of Huawei.In order to guarantee the stability of transmission, GSM communication module carries out following improvement to the control program of general gsm module:
(1) increase device data caching function, in the situation that GPRS breaks, data are stored, buffer size can be made as 50K;
(2) for guaranteeing the real-time of transfer of data, increase broken string redialing function;
(3) increase house dog chronograph mechanism (watchdog timer, WDT), can equipment deadlock situation be processed and be recovered.House dog is a timer circuit, generally has an input, and one outputs to the reset terminal (RST) of CPU.When the normal work of CPU, export at set intervals a signal to input, give WDT zero clearing, if exceed not zero clearing of official hour (generally in the time of program fleet), WDT timing exceedes, and will provide a reset signal to CPU, so cpu reset, prevents from crashing.The effect of WDT, prevents program generation endless loop, program fleet in other words exactly.
Five, car-mounted display module
Car-mounted display module is arranged on the position that in rolling machine driver's cabin, handled easily hand is seen, adopts Windows Mobile6.0 operating system, the corresponding software of operation exploitation.Hardware components comprises color LCD screen, CPU(Central Processing Unit, central processing unit), FLASH memory, RAM memory, RS-232 interface, power transfer module etc.Car-mounted display module, by the integrated processing module power supply of single-chip microcomputer (in the present invention, supply voltage is 12V), by power transfer module transformation, then is powered to units such as CPU, FLASH memory, RAM memory and color LCD screens respectively.
Car-mounted display module is connected by the integrated processing module of RS-232 interface and single-chip microcomputer, shows in real time the current sampling time being transmitted by the integrated processing module of single-chip microcomputer, position coordinates, excited frequency and the exciting force of rolling machine on liquid crystal display.Rolling machine operator can, according to the information showing, be adjusted the running parameter of rolling machine to setting requirement in time.
Six, rolling machine power module
Rolling machine power module is arranged in rolling machine driver's cabin, adopts adaptive regulation voltage mode, and the supply voltage of rolling machine self is changed into the needed voltage of the integrated processing module of single-chip microcomputer (adopting 16.8V in the present invention).Specific works process is as follows:
First, self power supply of access rolling machine.Consider that the power supply in actual rolling machine work exports unstable situation, adopt electric source filter circuit to suppress the peaking voltage that may input, within the scope that input voltage allows in this module time, by DC-DC voltage changing module, input voltage is converted to required voltage.Then, pass through power filter and go ripple voltage circuit to guarantee the stable of output voltage.Finally, to the voltage (getting 16.8V in the present invention) of the integrated processing module stable output of single-chip microcomputer.GND is earth terminal, serves as power cathode.
Seven, database and application server system
Earth and rockfill dam rolls the monitoring in real time of excited frequency and exciting force and relates to mass data, considers the safety of data, high handling property and high availability, and provides Function Extension required high flexibility for application service layer.Adopt the database (as SQL Server2008) of enterprise-level version to be used for supported data application.
Database and application server system comprise DBM, analysis module and information feedback module.DBM receives the packet (comprising current sampling instant and corresponding rolling machine position coordinates, excited frequency and exciting force) being sent by data wireless transport module (DTU), then carry out data storage, and can monitor in real time IE client with excited frequency and exciting force and carry out data interaction and access.The rolling machine excited frequency of analysis module to the current time obtaining and the standard of exciting force and setting compare, and judge whether the excited frequency of current time rolling machine or exciting force meet design standard.Information feedback module is responsible for sending warning message, if rolling machine excited frequency or exciting force are not up to standard, application server end can automatically be monitored the PC (PC) of IE client in real time to excited frequency and exciting force by Internet network, and send warning message through GPRS network to quality control officer's (management, construction manager, owner etc.) hand-held PDA or mobile phone, vehicle carried mobile phone by GSM communication module (adopting Siemens MC 39i in the present invention).
Eight, PDA or mobile phone alarm module
PDA or mobile phone alarm module comprise the hand-held PDA of quality control officer or mobile phone alarm module, and vehicle carried mobile phone alarm module.Administrative staff are by having hand-held PDA or the mobile phone (in the present invention, PDA or mobile phone adopt Samsung Galaxy Note II mobile phone) of GPRS communication function, and it receives rolling machine excited frequency and the exciting force warning message not up to standard of database and application server system transmission by GPRS network.
Vehicle carried mobile phone alarm module is one and has GPRS communication function, programmable giant-screen mobile phone (emerging U817 mobile phone in adopting in the present invention), is arranged on the place of the interior convenient operation hand observation of driver's cabin of rolling machine.This module can receive the excited frequency and the exciting force alarming short message not up to standard (in the time that message volume exceedes internal memory, automatically deleting alarming short message in early stage) that are sended over by server application quantity-unlimitingly.Meanwhile, this module adopts solar cell automatic power, can guarantee for a long time mobile phone power-on, the drawback of avoiding artificial charging to bring.
Nine, excited frequency and exciting force are monitored IE client in real time
Adopt JAVA network programming language, exploitation excited frequency and exciting force are monitored IE client in real time, and user can access by Internet.Excited frequency and exciting force monitor in real time IE client start monitoring before, need rolling machine work excited frequency and the exciting force of established standards, polarization quality and the eccentricity of machinery, and the attribute information that will monitor working bin face (comprises the numbering of storehouse face, unit in charge of construction, rolling machine configuring condition and numbering thereof etc.).In monitor procedure, can show in real time the current location of rolling machine, and actual excited frequency and the exciting force of output, receive excited frequency or exciting force warning message not up to standard that PDA or mobile phone alarm module send; Simultaneously, can realize and roll the rolling machine excited frequency of any time optional position, region and the inquiry of exciting force, and can statistical summaries rolling machine excited frequency and the monitoring situation of exciting force, form form, carry out the foundation of quality examination and machine management as relevant departments.
Claims (6)
1. an earth and rockfill dam rolls excited frequency and exciting force method for real-time monitoring, it is characterized in that, comprise the steps: to utilize the rolling machine excited frequency being arranged in rolling machine vibrating wheels and on the position of not rotating with vibrating wheels to measure module, earth and rockfill dam material is rolled in process, the vibration acceleration signal of Real-time Collection muller vertical direction, process signal mode number conversion and Fast Fourier Transform (FFT) FFT obtain the frequency spectrum data of muller vibration acceleration, wherein, fundamental frequency is the excited frequency of the actual output of rolling machine; Determine the position coordinates of current time rolling machine; By rolling machine excited frequency, and the eccentric block quality of this rolling machine and eccentricity, calculate the actual exciting force of rolling machine output, and identical according to sampling instant, excited frequency, exciting force and rolling machine position coordinates are mapped; Whether the excited frequency and the exciting force that judge current time rolling machine meet design standard, if not up to standard, send warning message.
2. earth and rockfill dam as claimed in claim 1 rolls excited frequency and exciting force method for real-time monitoring, it is characterized in that, the design formulas of exciting force F is as follows:
F＝Meω
2=Me4π
2f
0 2
In formula, M is eccentric block quality, and e is eccentric throw, generally given in rolling machine device parameter manual; f
0for the excited frequency monitoring, ω is angular frequency.
Utilize rolling machine excited frequency to measure acceleration transducer in module by the time domain simulation signal of enough little time interval continuous acquisition muller acceleration, by signal mode number conversion, be converted into time-domain digital signal, sampling time interval T meet under requirement of engineering precision, take fully enough little, at this moment analog signal f
a(t) just can represent by data signal, that is:
f（n）＝f
a（n·T）；
In formula, f(n) be n discrete digital signal; f
a(nT) be the continuous analog signal in nT moment; f
sit is sample frequency;
And then the rolling machine time-domain digital signal obtaining through analog-to-digital conversion is carried out to Fourier transformation, nonperiodic signal f(t) adopt Fourier transformation form to be expressed as:
In formula, f(ω) be called f(t) Fourier transformation, and
Through Fast Fourier Transform (FFT), rolling machine acceleration signal is decomposed into countless harmonic waves
stack, obtain thus the frequency spectrum data of muller vibration acceleration, comprise the various frequencies and the corresponding amplitude thereof that form vibration acceleration signal, wherein, fundamental frequency is the actual excited frequency f of rolling machine output
0.
3. earth and rockfill dam as claimed in claim 1 rolls excited frequency and exciting force method for real-time monitoring, it is characterized in that, also comprises the following steps:
(1) utilize GPS locating module by being arranged on rolling machine driver's cabin top as far as possible near the gps satellite antenna of muller center position and the differential signal of difference wireless aerial reception gps satellite signal and GPS datum station, determine the position coordinates of current time rolling machine;
(2) utilize the integrated processing module of single-chip microcomputer being arranged in rolling machine driver's cabin by the rolling machine excited frequency receiving, and eccentric block quality and the eccentricity of this rolling machine calling from database and application server, calculate the actual exciting force of rolling machine output;
(3) data wireless transport module sends to database and application server system by current sampling instant and corresponding rolling machine position coordinates, excited frequency and exciting force data by GPRS network;
(4) database and application server system judge whether the actual excited frequency of rolling machine and exciting force meet design standard, if so, and execution step (6); If not, execution step (5);
(5) monitor in real time IE client transmission warning message by Internet network to excited frequency and exciting force; Or by GPRS(General Packet Radio Service, packet radio service technology) network sends warning message to quality control officer's hand-held PDA or mobile phone, vehicle carried mobile phone;
(6) excited frequency and exciting force are monitored IE client regular statistical summaries rolling machine excited frequency and exciting force situation in real time, and form form, as the foundation of relevant departments' quality examination and machine management.
4. earth and rockfill dam as claimed in claim 3 rolls excited frequency and exciting force method for real-time monitoring, it is characterized in that, excited frequency and exciting force monitor in real time IE client start monitoring before, rolling machine work excited frequency and the exciting force of input standard, polarization quality and the eccentricity of rolling machine, and the attribute information that will monitor working bin face comprises the numbering of storehouse face, unit in charge of construction, rolling machine configuring condition and numbering thereof, in database and application server, in monitor procedure, show in real time the current location of rolling machine, and actual excited frequency and the exciting force of output, receive excited frequency or exciting force warning message not up to standard that PDA or mobile phone alarm module send, meanwhile, realize and rolled the rolling machine excited frequency of any time optional position, region and the inquiry of exciting force, and the monitoring situation of statistical summaries rolling machine excited frequency and exciting force, form form and report relevant departments, the auxiliary material that check as subsequent quality.
5. earth and rockfill dam rolls excited frequency and an exciting force real-time monitoring system, it is characterized in that, comprises rolling machine excited frequency mensuration module, the integrated processing module of single-chip microcomputer, car-mounted display module;
Rolling machine excited frequency is measured module and is arranged in rolling machine vibrating wheels and the position of not rotating with vibrating wheels, for the process of at rolling machine, earth and rockfill dam being carried out compacting, the vibration acceleration signal of Real-time Collection muller vertical direction, process signal mode number conversion and Fast Fourier Transform (FFT) FFT obtain the frequency spectrum data of muller vibration acceleration, then current demand signal acquisition time and rolling machine excited frequency transfer of data are arrived to the integrated processing module of single-chip microcomputer; The rolling machine excited frequency that the integrated processing module utilization of single-chip microcomputer receives, and eccentric block quality and the eccentricity of this rolling machine calling from database and application server, calculate the actual exciting force of rolling machine output; Send data wireless transport module DTU and car-mounted display module to; Car-mounted display module is arranged in rolling machine driver's cabin, shows in real time current sampling time, rolling machine position coordinates, excited frequency and exciting force, according to demonstration information, adjusts in time the running parameter of rolling machine for operator.
6. earth and rockfill dam as claimed in claim 5 rolls excited frequency and exciting force real-time monitoring system, it is characterized in that, also comprises: GPS locating module, data wireless transport module DTU, database and application server system;
GPS locating module comprises GPS receiver, gps satellite antenna and difference wireless aerial; Gps satellite antenna and difference wireless aerial are arranged on to rolling machine driver's cabin top as far as possible near the position of muller central point, by receiving the differential signal of gps satellite signal and GPS datum station, determine the position coordinates of sampling instant rolling machine, and send sampling instant and corresponding rolling machine position coordinate data thereof to single-chip microcomputer integrated processing module;
Data wireless transport module DTU, sends to remote data base application server in real time for the data that integrated single-chip microcomputer processing module is sent;
The current sampling time that database and application server system receive and storage data wireless transport module sends, and corresponding rolling machine position coordinates, excited frequency and exciting force data, and judge rolling machine excited frequency and exciting force whether up to standard, if not up to standard, send warning message by Internet, GPRS.
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