CN103616064A - Long-table-face dynamic rail weighbridge weighing system - Google Patents
Long-table-face dynamic rail weighbridge weighing system Download PDFInfo
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Abstract
The invention provides a long-table-face dynamic rail weighbridge weighing system which comprises a weighing table, a signal processing device and a plurality of pressure sensors. A bearing steel rail is arranged on the weighing table, and the pressure sensors are arranged in the weighing table and used for obtaining wheel weight information of a detected train and for converting the wheel weight information to analog signals; the signal processing device is connected with the pressure sensors and used for converting the analog signals of the wheel weight information to digital signals, the type of the detected train and the average speed of the detected train passing through the weighing table are obtained according to the digital signals, the period that all wheels of the detected train are located on the weighing table at the same time is obtained according to the type of the train and the getting-on-weighbridge and getting-off-weighbridge signal changing of the detected train, and the weight and the unbalance loading information of the detected train are calculated according to the digital signals in the period. The system can be used for calculating the weight information and other information of a train in the dynamic running process, and can improve the train weighing accuracy.
Description
Technical field
The present invention relates to automatic field, relate in particular to a kind of long-flat dynamic raidroad track scale weighing system.
Background technology
Along with national economy and scientific and technical development, trade flows both domestic and external are more frequent, all trades and professions are also more and more higher to the requirement of weighing technology, not only require the electronic track scale of realizing means as metering should possess accurate measurement, use the basic characteristics such as stable, work efficiency, the metering speed of its metering implementation procedure are also had higher requirement.
At present, domestic track scale weighing system, draws weight thereby mostly all use short table top to carry out dynamic measurement to the lorry in travelling by bogie, and still, the accuracy that this structure weighs is also not high.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is to provide a kind of long-flat dynamic raidroad track scale weighing system, can calculate the weight information of train in dynamic driving process and improve the weighing accuracy of the weight of train.
(2) technical scheme
For solving the problems of the technologies described above, technical scheme of the present invention provides a kind of long-flat dynamic raidroad track scale weighing system, comprises weighing unit, signal processing apparatus and a plurality of pressure transducer;
On described weighing unit, be provided with carrying rails;
It is inner that described a plurality of pressure transducer is arranged on described weighing unit, for obtaining the wheel load information of detected vehicle, and described wheel load information is converted to simulating signal;
Described signal processing apparatus, be connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is converted to digital signal, and obtain the vehicle of described detected vehicle and described detected vehicle by the average velocity of described weighing unit according to described digital signal, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.
Further, described signal processing apparatus comprises signal condition module, data acquisition module, bus module and processing module;
Described signal condition module, is connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is carried out to filtering processing;
Described data acquisition module, is connected with described signal condition module, for the simulating signal after described filtering is processed, is converted to digital signal;
Described processing module is connected with described data acquisition module by described bus module, vehicle and described detected vehicle that described processing module obtains described detected vehicle according to described digital signal pass through the average velocity of described weighing unit, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.
Further, described data acquisition module comprises multichannel selected cell, channel selecting control module, logic control element, clock generation unit, AD conversion unit and storage unit;
The input end of described multichannel selected cell is connected with the output terminal of described signal condition module;
Described channel selecting control module is according to the pressure transducer number of described a plurality of pressure transducers, the channel range of setting data acquisition channel, and export an address signal corresponding to pressure transducer in described a plurality of pressure transducers to described multichannel selected cell;
Described multichannel selected cell selects according to the address signal receiving the pressure transducer that described address signal is corresponding, and the analog signal output that the pressure transducer of described selection is gathered is to described AD conversion unit;
Described AD conversion unit, is connected with described multichannel selected cell, for the simulating signal that will receive from described multichannel selected cell, is converted to digital signal, and transfers to described storage unit and store;
Described clock generation unit produces a plurality of clock signals by described logic control element;
Described logic control element provides described multichannel selected cell, described channel selecting control module, described AD conversion unit and the needed various states of described storage unit and controls sequential logic, control described multichannel selected cell and described AD conversion unit and carry out data acquisition, and the interface sequence to described storage unit is provided, so that the digital signal after described AD conversion unit conversion is stored to described storage unit.
Further, described bus module is a kind of in PC104 bus, pci bus, CAN bus, RS232 bus.
Further, described signal processing apparatus also comprises power module, for providing operating voltage to described signal processing apparatus.
(3) beneficial effect
The present invention is by the wheel load information of the detected vehicle of a plurality of pressure transducer collections, and by signal processing apparatus, this wheel load information analyzed, thereby can calculate the information such as weight of train in dynamic driving process and improve the weighing accuracy of the weight of train.
Accompanying drawing explanation
Fig. 1 is the structural drawing of a kind of long-flat dynamic raidroad track scale weighing system of providing of embodiment of the present invention;
Fig. 2 is the structural drawing of the another kind of long-flat dynamic raidroad track scale weighing system that provides of embodiment of the present invention;
Fig. 3 is the structural drawing of a kind of data acquisition module of providing of embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the structural drawing of a kind of long-flat dynamic raidroad track scale weighing system of providing of embodiment of the present invention, comprise weighing unit 3, signal processing apparatus 2 and a plurality of pressure transducer, the plurality of pressure transducer comprises the first pressure transducer 11, the second pressure transducer 12, the 3rd pressure transducer 13, the 4th pressure transducer 14, the five pressure transducer 15, the six pressure transducers 16;
Wherein, on described weighing unit 3, be provided with carrying rails 1; The first pressure transducer 11, the second pressure transducer 12, the 3rd pressure transducer 13, the 4th pressure transducer 14, the 5th pressure transducer 15, it is inner that the 6th pressure transducer 16 is arranged on described weighing unit, for obtaining the wheel load information of detected vehicle, and described wheel load information is converted to simulating signal;
Described signal processing apparatus 2, be connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is converted to digital signal, and obtain the vehicle of described detected vehicle and described detected vehicle by the average velocity of described weighing unit according to described digital signal, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.
In embodiment of the present invention, the number of pressure transducer does not limit the scope of the invention.Described many pressure transducers can be the pressure transducer of spaced set, and for example, two groups of adjacent pressure transducer centre distances are 650cm, and same pressure transducer is also installed in the relevant position on an other one steel rail.
Referring to Fig. 2, Fig. 2 is the structural drawing of the another kind of long-flat dynamic raidroad track scale weighing system that provides of embodiment of the present invention, comprise weighing unit 3, signal processing apparatus 2 and a plurality of pressure transducer, wherein, described signal processing apparatus 2 comprises signal condition module 21, data acquisition module 22, bus module 23 and processing module 24;
Described signal condition module 21, is connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is carried out to filtering processing;
Described data acquisition module 22, is connected with described signal condition module 21, for the simulating signal after described filtering is processed, is converted to digital signal;
Described processing module 24 is connected with described data acquisition module 22 by described bus module 23, vehicle and described detected vehicle that described processing module 24 obtains described detected vehicle according to described digital signal pass through the average velocity of described weighing unit, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.Wherein, this unbalance loading information comprises that the detected front and back unbalance loading of vehicle is, the result of left and right unbalance loading.
Preferably, described signal processing apparatus also comprises power module 25, for providing operating voltage to described signal processing apparatus, thereby is signal condition module 21, data acquisition module 22, and bus module 23 and processing module 24 provide electric power.
Wherein, described bus module is a kind of in PC104 bus, pci bus, CAN bus, RS232 bus
Particularly, a plurality of simulating signals that the plurality of pressure transducer collects are connected respectively to a plurality of input ends of signal condition module 21, respectively input signal conditioning module 21 amplify separately, filtering, use the high-frequency interferencing signal in low-pass filter filtered signal, the AD chip of the Low Drift Temperature of the import that the filtering of signal condition module 21 and amplifying circuit can be selected, low noise, high reliability, high integration, has advantages of that common-mode rejection ratio is high, precision is high.Wave filter adopts active low-pass filter circuit to add three grades of filtering such as port element low-pass filtering, for eliminating the high frequency interference composition that many pressure transducer output signals comprise, therefore, antijamming capability is extremely strong, solve single group of signal and transmitted susceptible problem, add the potentiometer that adjust zero point and gain is adjusted, to guarantee the consistance of every group of signal performance simultaneously.
The multi-channel output of input signal conditioning module 21 is connected with the multi-channel input of data acquisition module 22 respectively.Data acquisition module 22 is converted into digital signal by the simulating signal of input, and stores.Data acquisition module 22 is connected with processing module 24 by bus module 23.
In addition, also a human-computer interaction interface can be set, for supervisory control system running situation, the data of display system operational factor and collection.
For signal acquiring system 2, RS232 data-interface is set, be connected with host computer, processing module 24 is carried out communication with host computer.Processing module 24 adopts long table face dynamic weighing algorithm, by digital signal being analyzed to the result that generates sequence number, gross weight, the speed of a motor vehicle, front and back unbalance loading, left and right unbalance loading.Long table face weighing algorithm can gather pressure sensor signal in real time and judge, when pressure sensor signal is greater than initial threshold, is judged as and sends a car, constantly successively according to the upper title of each axle under the frequency record of sampling simultaneously, algorithm can calculate the wheelbase between every two axles automatically, wheelbase information is as the standard of sentencing car foundation, record respectively the weight of each wheel simultaneously, after four axles of a joint lorry are all gone up title, complete vehicle weight is calculated, then record respectively by that analogy the weight of each car.Particularly, analyze the signal of pressure transducer, therefrom accurately extract each wheel by the moment of each pressure transducer.According to the relative position between pressure transducer, analyze each wheel by the average velocity of weighing unit again; According to the relative position between pressure transducer and pressure transducer, calculate each wheel by the accurate moment of each pressure transducer; According to wheel velocity and each wheel, by the moment of every pressure transducer, calculate each wheel by the interval of 1 meter of every pressure transducer front and back, calculating pressure signal averaging in this is interval, this mean value is directly proportional to pressure; The interval mean value in pressure transducer top of same wheel process is averaging again, obtains the force value that this takes turns.Mistiming according to wheel speed and front and back two-wheeled by same pressure transducer can calculate wheelbase, according to wheelbase judgement vehicle.When four axles of judgement one joint lorry are simultaneously on weighing unit, thereby all pressure signal data are calculated to the weight that draws car load.
Particularly, referring to Fig. 3, described data acquisition module 22 comprises multichannel selected cell 221, channel selecting control module 222, logic control element 223, clock generation unit 224, AD conversion unit 225 and storage unit 226;
The input end of described multichannel selected cell 221 is connected with the output terminal of described signal condition module 21;
Described channel selecting control module 222 is according to the pressure transducer number of described a plurality of pressure transducers, the channel range of setting data acquisition channel, and export an address signal corresponding to pressure transducer in described a plurality of pressure transducers to described multichannel selected cell 221;
Described multichannel selected cell 221 selects according to the address signal receiving the pressure transducer that described address signal is corresponding, and the analog signal output that the pressure transducer of described selection is gathered is to described AD conversion unit 225;
Described AD conversion unit 225, is connected with described multichannel selected cell 221, for the simulating signal that will receive from described multichannel selected cell 221, is converted to digital signal, and transfers to described storage unit 226 and store;
Described clock generation unit 224 produces a plurality of clock signals by described logic control element 223; Thereby for AD conversion unit 225, channel selecting control module 222, storage unit 226 provide reference clock signal, guarantee the clock synchronous of unit.
Described logic control element 223 provides described multichannel selected cell 221, described channel selecting control module 222, the needed various states of described AD conversion unit 225 and described storage unit 226 and control sequential logic, comprise sampling rate, the use of memory module distributes, start and stop sampling, transmission data, unlatching/disabled interrupt etc., control described multichannel selected cell 221 and described AD conversion unit 225 is carried out data acquisition, and provide the interface sequence to described storage unit, so that the digital signal after described AD conversion unit 225 conversions is stored to described storage unit 226, thereby realize the storage of translation data.Particularly, logic control element 223 comprises that subelement 2231 is controlled in sampled data storage and subelement 2232 is controlled in interruption.Wherein, sampled data storage control subelement 2231 carries out data-switching and storage for controlling AD conversion unit 225; Interrupt to control subelement 2232 for processing module 24 is produced to look-at-mes, by the digital information transmission of storage unit 226 interior storages in processing module 24.
In embodiment of the present invention, channel selecting control module 222 is according to the pressure transducer number of actual installation, the channel range of setting data acquisition channel, the corresponding pressure transducer of each data acquisition channel, for example, data acquisition channel can Wei12 road, preferred, corresponding to the setting of pressure transducer, data acquisition channel can be 16 tunnels.
Channel selecting control module 222 is under the control of logic control element 223, and OPADD signal is to multichannel selected cell 221, for selecting the information from certain pressure transducer of corresponding address signal.Channel selecting control module 222 is also respectively organized the corresponding address signal of pressure transducer for storage unit 226 provides, so that storage analog to digital conversion result makes every group of data-signal in storage unit 226 corresponding one by one with each group pressure transducer.Particularly, multichannel selected cell 221 is selected a certain road in outputting multiplex signals according to the binary address signal of channel selecting control module 222 inputs.AD conversion unit 225 completes the sampling to input simulating signal, is quantified as digital signal, and transmission converts sign to logic control element 223.Sampled data storage is controlled subelement 2231 and is sent read signal to AD conversion unit 225, and the digital signal converting is stored in storage unit 226.So far, in storage unit 226, storage comes from the digital signal of a certain group of pressure transducer, and address signal corresponding to this group pressure transducer.
Wherein, when the digital signal in gathering and be stored in storage unit 226 reaches some, for avoiding storage unit 226, overflow, processing module 24 is by the digital signal in reading cells 226, and storage unit 226 is emptied, particularly, there are two kinds of modes to realize: to interrupt control mode and inquiry mode.
Wherein, interruption control mode is as follows:
Wherein, inquiry mode is as follows:
Processing module 24 sends querying command by bus module 23 to logic control element 223, by query State position 1.Logic control element 223 is according to the numerical information in querying command reading cells 226, by bus module 23, send processing module 24 to, processing module 24 completes processing and the analysis of data in down-stream, calculate car weight, judgement vehicle, judgement direction to the car, and judge whether train overloads, unbalance loading.
When long-flat dynamic raidroad track scale weighing system that vehicle provides by embodiment of the present invention, too much pressure transducer of wheel load (bogie) information exchange of detected vehicle is converted to proportional analog voltage signal, be sent to the respective channel of signal condition module 21, to signal amplification, filtering.By data acquisition module 22, complete A/D and change, data acquisition and storage, and data upload, the reception of uploading data and the host computer (server) of preserving by system outside complete.
In embodiment of the present invention, AD conversion unit 225 can be 12 of precision, and sampling rate is 100KHz, and clock generation unit 224 is 40MHz crystal oscillator, and bus module 23 can be PC104 bus.Storage unit 226 can be used FIFO(First In First Out first in first out) storer realizes.Utilize the Status Flag signal of FIFO storer to carry out Data Transmission Controlling.When the data of storing are half-full state, to logic control element 223, send read requests signal in FIFO storer.
Preferably, logic control element 223 can be by FPGA(Field Programmable Gate Array, field programmable gate array) realize, FPGA is as independent control execution module, by frequency division, provide clock for other operational modules, also control the normal operation of the each several part hardware circuit that other modules connect simultaneously.By writing corresponding VHDL(VHSIC Hardware Description Language, hypervelocity integrated circuit hardware description language) code, generate corresponding function circuit, realize latching, judging and processing and control to the execution of various command signals and output signal signal.
The long-flat dynamic raidroad track scale weighing system that embodiment of the present invention provides, multichannel analog signals is after signal condition module 21 and multichannel selected cell 221, input AD conversion unit 225, AD conversion unit 225 is under the control of FPGA, complete A/D(mould/number) conversion, and the result of conversion is sent into FIFO(First In First Out first in first out) storer.Processing module is used for carrying out system control and data processing, and FPGA is used for controlling data acquisition and data buffer storage.By AD conversion unit 225, the simulating signal of input is converted to digital signal, the FIFO storer of controlling through FPGA carries out buffer memory, by processing module, in the mode of interrupting or inquiring about, receive the data that collect by PC104 bus, processing module is processed and is analyzed the data that gather again.Signal Real-time Collection, processing section is separated with man-machine interface part with the data base administration of host computer, improve the reliability of sampling, processing section program, and do not increase the burden of host computer.
The long-flat dynamic raidroad track scale weighing system that embodiment of the present invention provides, by the wheel load information of the detected vehicle of a plurality of pressure transducer collections, and by signal processing apparatus, this wheel load information is analyzed, thereby can calculate the information such as weight of train in dynamic driving process and improve the weighing accuracy of the weight of train, improved the work efficiency of long-flat dynamic raidroad track scale weighing system, in addition, by using PC104 system, having the signals collecting work of requirement of real-time by data acquisition module complete independently, guarantee reliable continuous sampling, requirement of real time, and this long-flat dynamic raidroad track scale weighing system can be worked by independent processing data operation, can improve controllability and the reliability of data acquisition and processing (DAP) process.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (5)
1. a long-flat dynamic raidroad track scale weighing system, is characterized in that, comprises weighing unit, signal processing apparatus and a plurality of pressure transducer;
On described weighing unit, be provided with carrying rails;
It is inner that described a plurality of pressure transducer is arranged on described weighing unit, for obtaining the wheel load information of detected vehicle, and described wheel load information is converted to simulating signal;
Described signal processing apparatus, be connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is converted to digital signal, and obtain the vehicle of described detected vehicle and described detected vehicle by the average velocity of described weighing unit according to described digital signal, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.
2. long-flat dynamic raidroad track scale weighing system according to claim 1, is characterized in that, described signal processing apparatus comprises signal condition module, data acquisition module, bus module and processing module;
Described signal condition module, is connected with described a plurality of pressure transducers respectively, for the simulating signal of described wheel load information is carried out to filtering processing;
Described data acquisition module, is connected with described signal condition module, for the simulating signal after described filtering is processed, is converted to digital signal;
Described processing module is connected with described data acquisition module by described bus module, vehicle and described detected vehicle that described processing module obtains described detected vehicle according to described digital signal pass through the average velocity of described weighing unit, according to the upper title of detected vehicle described in described vehicle and described digital signal with call in the following text the time period that all wheels that signal intensity obtains described detected vehicle are positioned at described weighing unit simultaneously, according to the digital signal in the described time period, calculate car weight and the unbalance loading information of described detected vehicle.
3. long-flat dynamic raidroad track scale weighing system according to claim 2, it is characterized in that, described data acquisition module comprises multichannel selected cell, channel selecting control module, logic control element, clock generation unit, AD conversion unit and storage unit;
The input end of described multichannel selected cell is connected with the output terminal of described signal condition module;
Described channel selecting control module is according to the pressure transducer number of described a plurality of pressure transducers, the channel range of setting data acquisition channel, and export an address signal corresponding to pressure transducer in described a plurality of pressure transducers to described multichannel selected cell;
Described multichannel selected cell selects according to the address signal receiving the pressure transducer that described address signal is corresponding, and the analog signal output that the pressure transducer of described selection is gathered is to described AD conversion unit;
Described AD conversion unit, is connected with described multichannel selected cell, for the simulating signal that will receive from described multichannel selected cell, is converted to digital signal, and transfers to described storage unit and store;
Described clock generation unit produces a plurality of clock signals by described logic control element;
Described logic control element provides described multichannel selected cell, described channel selecting control module, described AD conversion unit and the needed various states of described storage unit and controls sequential logic, control described multichannel selected cell and described AD conversion unit and carry out data acquisition, and the interface sequence to described storage unit is provided, so that the digital signal after described AD conversion unit conversion is stored to described storage unit.
4. long-flat dynamic raidroad track scale weighing system according to claim 2, is characterized in that, described bus module is a kind of in PC104 bus, pci bus, CAN bus, RS232 bus.
5. long-flat dynamic raidroad track scale weighing system according to claim 2, is characterized in that, described signal processing apparatus also comprises power module, for providing operating voltage to described signal processing apparatus.
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| CN201310629679.6A CN103616064A (en) | 2013-11-29 | 2013-11-29 | Long-table-face dynamic rail weighbridge weighing system |
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| CN104729642A (en) * | 2015-04-13 | 2015-06-24 | 杭州钱江称重技术有限公司 | Rail weighbridge measuring system based on CAN (controller area network) bus |
| CN106706100A (en) * | 2017-03-08 | 2017-05-24 | 成都货安计量技术中心有限公司 | Rail weighbridge system based on Ethernet |
| CN112697249A (en) * | 2020-12-30 | 2021-04-23 | 北京万集科技股份有限公司 | Dynamic vehicle overrun determination method and determination system |
| CN113654635A (en) * | 2021-08-13 | 2021-11-16 | 中车青岛四方机车车辆股份有限公司 | Weighing system and device for magnetic levitation vehicle |
| CN115406514A (en) * | 2022-11-02 | 2022-11-29 | 云南昆船电子设备有限公司 | Load measurement system and method for unmanned vehicle |
| CN117125109A (en) * | 2023-10-26 | 2023-11-28 | 北京东方瑞威科技发展股份有限公司 | Dedicated multichannel high-speed digital sensor system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112697249A (en) * | 2020-12-30 | 2021-04-23 | 北京万集科技股份有限公司 | Dynamic vehicle overrun determination method and determination system |
| CN113654635A (en) * | 2021-08-13 | 2021-11-16 | 中车青岛四方机车车辆股份有限公司 | Weighing system and device for magnetic levitation vehicle |
| CN115406514A (en) * | 2022-11-02 | 2022-11-29 | 云南昆船电子设备有限公司 | Load measurement system and method for unmanned vehicle |
| CN115406514B (en) * | 2022-11-02 | 2023-02-14 | 云南昆船电子设备有限公司 | Load measurement system and method for unmanned vehicle |
| CN117125109A (en) * | 2023-10-26 | 2023-11-28 | 北京东方瑞威科技发展股份有限公司 | Dedicated multichannel high-speed digital sensor system |
| CN117125109B (en) * | 2023-10-26 | 2024-01-30 | 北京东方瑞威科技发展股份有限公司 | Dedicated multichannel high-speed digital sensor system |
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Application publication date: 20140305 |