CN101269665B - Axle counting system by using strain detection and implementing method thereof - Google Patents
Axle counting system by using strain detection and implementing method thereof Download PDFInfo
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- CN101269665B CN101269665B CN200810105951XA CN200810105951A CN101269665B CN 101269665 B CN101269665 B CN 101269665B CN 200810105951X A CN200810105951X A CN 200810105951XA CN 200810105951 A CN200810105951 A CN 200810105951A CN 101269665 B CN101269665 B CN 101269665B
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Abstract
The invention relates to a calculation shaft system which adopts deformation inspection to enhance the anti-jamming effect and has the technical proposal that a calculation shaft comprises a magnetic head sensor, an electric inspection box, an inspection main machine and a deformation sensor. The calculation shaft system is characterized in that the deformation sensor is connected with the electric inspection box, the electric inspection box is connected with the inspection main machine to give calculation shaft signals for the inspection main machine, wherein, the electric inspection box is composed of a power supply part, a measure electric bridge part, a difference magnifying part, a CPU, a calculation shaft signal input part, a calculation shaft signal output part and an adjustment and measure interface. The difference magnifying can be carried out after the electric bridge measure, resistant signals measured by a crosswise deformation piece and a lengthwise deformation piece are exchanged into pressure signals which can be exchanged into digital signals via the AD of the CPU. The calculation shaft system also discloses an implement method of the deformation machine inspectioncalculation shaft system.
Description
Technical field
The invention belongs to railway axle counting system field, especially a kind of axle counting system and using method thereof that adopts strain detecting.Axle counting system is the signal that utilizes magnetic head sensor sensing train wheel process, judges the interval check system whether section has car to take.
Background technology
At present, the general-duty axle counting system adopts magnetic head sensor sensing train wheel signal, as shown in Figure 1, the signal of detection of electrons box EAK detecting sensor magnetic head 1 and magnetic head 2, then the signal that detects is transferred to the main frame of control center by meter shaft cable 3, software is judged the current car process that whether has by signal waveform in the main frame.Magnetic head 1 and magnetic head 2 sensor signal waveforms when train process transducer magnetic head 1 and magnetic head 2, will produce a low level waveform as shown in Figure 2.
The problem that existing axle counting system exists is: when the construction of railways personnel hold spade and slip over the magnetic head sensor, easily magnetic head is differentiated whether car is arranged through causing interference, the interference problem of this metal object never is well solved.
Summary of the invention
The purpose of this invention is to provide a kind of whether auxiliary judgment has the car process by increase strain sensor near the magnetic head sensor, thereby improve the axle counting system and the using method thereof of the employing strain detecting of disturbance rejection effect.
Technical scheme of the present invention is: the axle counting system that adopts strain detecting, comprise magnetic head sensor, detection of electrons box, monitoring main frame, it is characterized in that also being provided with strain sensor, described strain sensor is connected with the detection of electrons box, the detection of electrons box is connected with the monitoring main frame, sends axle-counting signal to the monitoring main frame; Wherein, described detection of electrons box is surveyed serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal mouth, accent and is formed, measuring bridge part, difference are amplified and CPU is linked in sequence, the axle-counting signal mouth is surveyed serial ports with accent and is connected with CPU respectively, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
The circuit parallel that described power unit is made up of resistance R 4 and electric capacity E11, diode D3 and capacitor C 4 is in series, the measuring bridge part is formed in parallel by the circuit series of resistance R 5, resistance R 8 and the circuit series of resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
Described strain sensor is SMD sensor.
Adopt the implementation method of strain detecting axle counting system, it is characterized in that strain sensor is installed in below the opposite side rail with magnetic head sensor parallel position, the use jig is installed, then strain sensor is connected with the detection of electrons box respectively with the magnetic head sensor, again the detection of electrons box is connected with the monitoring main frame.
Jig have draw-in groove along rail bearing of trend symmetrical laying is provided with the draw-in groove base plate between the draw-in groove of both sides, the bottom of rail is installed in the draw-in groove of jig, between draw-in groove base plate and rail lower surface strain sensor is installed.
Effect of the present invention is: wheel is through slipping over spade, it all is metal object, but its weight difference is apart from very big, adopt strain sensor, whether the current wave form varies of threshold value auxiliary judgment by strain is set is the wheel process, the interference that little metal objects such as spade cause the magnetic head sensor can be reduced to minimumly, improve the antijamming capability of axle counting system greatly.
The present invention is described further below in conjunction with drawings and Examples.
The drawing explanation
Fig. 1 is the structural representation of prior art axle counting system;
Fig. 2 is a prior art axle counting system waveform sensor scheme drawing;
Fig. 3 is an axle counting system structural representation of the present invention;
Fig. 4 is the circuit block diagram of axle counting system detection of electrons box of the present invention;
Fig. 5 is the schematic circuit diagram of axle counting system detection of electrons box of the present invention;
Fig. 6 is a detection of electrons box CPU program flow chart of the present invention
Fig. 7 is an axle counting system embodiment block diagram of the present invention;
Fig. 8 is an axle counting system strain sensor scheme of installation of the present invention.
The specific embodiment
Among Fig. 3, adopt the axle counting system of strain detecting, comprise magnetic head sensor 1 and magnetic head sensor 2, detection of electrons box, monitoring main frame, also be provided with strain sensor 4, strain sensor 4 is SMD sensor.Strain sensor 4 is connected with the detection of electrons box, and the detection of electrons box is connected by meter shaft cable 3 with the monitoring main frame, sends axle-counting signal to the monitoring main frame; Wherein, the detection of electrons box is surveyed serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal output, accent and is formed, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal (referring to Fig. 4).
Among Fig. 5, the power unit of detection of electrons box is made up of resistance R 4, electric capacity E11, diode D3 and capacitor C 4, the measuring bridge part is made up of resistance R 5, resistance R 6, resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
Among Fig. 6, when wheel sensor receives wave form varies, not directly to enter meter axle program, but at first judged whether strain, to guarantee at first before judging strain whether strain sensor itself is normal, if strain sensor itself is fault then peel off the auxiliary judgment module, directly meter axle, and prompting watch keeper keeps in repair strain module, if strain sensor is normal, and detected strain at this moment, then enter a meter axle program, otherwise judge that this wave form varies is for disturbing.
Among Fig. 7, adopt the implementation method of strain detecting axle counting system, strain sensor is installed in below the opposite side rail with magnetic head sensor parallel position, the use jig is installed, then strain sensor is connected with the detection of electrons box respectively with the magnetic head sensor, again the detection of electrons box is connected with the monitoring main frame.
Jig 7 have draw-in groove along rail 6 bearing of trend symmetrical layings is provided with draw-in groove base plate 8 between the draw-in groove of both sides, the bottom of rail 6 is installed in the draw-in groove of jig 7, and strain sensor 4 (referring to Fig. 8) is installed between draw-in groove base plate 8 and rail lower surface.
Near principle of work of the present invention: the magnetic head sensor of existing axle counting system, strain sensor is installed, adopt the mode auxiliary detection of strain whether the car process is arranged, when train process strain sensor, strain sensor sends a signal to the detection of electrons box, and this signal is as the auxiliary judgment condition judgment meter axle condition that the car process is arranged.The strain sensing module itself has self-checking function, and when the strain sensor fault, system is peeled off the condition of strain sensor auxiliary judgment automatically, system still can normally count axle, do not influence the use of axle counting system, simultaneously, the failure message of strain sensing is gone up alarm in the street in monitoring.
Strain detecting box principle of work: the sensor processing unit circuit block diagram is surveyed serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal output, accent and is formed as shown in Figure 5.Power unit is that input 24V is changed into 5V, this circuit is in order to satisfy on the communication board of in the future this circuit being installed, need to be applicable to single 24V power supply, and to be+the 5V power supply with the 24V power source conversion, be the power supply of CPU numerical portion, the simulation part still adopts the power supply of 24V power supply.
Carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
In order to measure the big or small instant playback of strain, adopt and transfer the survey serial ports to carry out the upper computer demonstration.
The axle-counting signal input is that when axle-counting signal changed, whether CPU finds by interruption was axle-counting signal with the digital signal input of axle-counting signal,
Because the signal and the axle-counting signal of sensor may not be synchronous, leave input sensor signal in the circuit, meter axle input logic signal is handled by the GPIO mouth of CPU, obtain whether this meter axle is effective axle-counting signal, if have stress signal to produce so within a certain period of time, can axle-counting signal be exported axle-counting signal by the pressure sensor pic chip like this.
The strain sensor principle of work: strain sensor is installed in below the opposite side rail with magnetic head sensor parallel position, uses jig to install.When deformation takes place downwards in rail, by jig and rail, masterpiece is used for post dress thing, deformation (forming Hui Shi electric bridge half arm) by measurement column dress thing both direction, the longitudinal deformation of measurement column, thereby by the EAK amplifying circuit, conversion enters CPU and judges (for adaptive temperature or other factors change, adopting CPU to handle) through AD again.
Claims (5)
1. adopt the axle counting system of strain detecting, comprise magnetic head sensor, detection of electrons box, monitoring main frame, it is characterized in that also being provided with strain sensor, described strain sensor is connected with the detection of electrons box, the detection of electrons box is connected with the monitoring main frame, sends axle-counting signal to the monitoring main frame; Wherein, described detection of electrons box is surveyed serial ports by power unit, measuring bridge part, difference amplification, CPU and axle-counting signal input with axle-counting signal mouth, accent and is formed, measuring bridge part, difference are amplified and CPU is linked in sequence, the axle-counting signal mouth is surveyed serial ports with accent and is connected with CPU respectively, carry out difference after the bridge measurement and amplify, transfer mould the AD of voltage signal by CPU to the resistance signal of the measurement of resistance of strain-gauge and vertical strain-gauge and be converted to digital signal.
2. axle counting system strain-Sensing device according to claim 1, it is characterized in that the circuit parallel that described power unit is made up of resistance R 4 and electric capacity E11, diode D3 and capacitor C 4 is in series, the measuring bridge part is formed in parallel by the circuit series of resistance R 5, resistance R 8 and the circuit series of resistance R 7 and resistance R 8, the difference amplifier section is made of chip LM158 and peripheral circuit thereof, CPU adopts chip DSPIC30F3012, and axle-counting signal input, axle-counting signal output and accent are surveyed serial ports and realized by chip MAX232A.
3. the axle counting system of employing strain detecting according to claim 1 and 2 is characterized in that described strain sensor is SMD sensor.
4. as the using method of the described employing strain detecting axle counting system of one of above-mentioned each claim, it is characterized in that strain sensor is installed in below the opposite side rail with magnetic head sensor parallel position, the use jig is installed, then strain sensor is connected with the detection of electrons box respectively with the magnetic head sensor, again the detection of electrons box is connected with the monitoring main frame.
5. the using method of employing strain detecting axle counting system according to claim 4, it is characterized in that at the jig that has draw-in groove along rail bearing of trend symmetrical laying, be provided with the draw-in groove base plate between the draw-in groove of both sides, the bottom of rail is installed in the draw-in groove of jig, between draw-in groove base plate and rail lower surface strain sensor is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810105951XA CN101269665B (en) | 2008-05-06 | 2008-05-06 | Axle counting system by using strain detection and implementing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810105951XA CN101269665B (en) | 2008-05-06 | 2008-05-06 | Axle counting system by using strain detection and implementing method thereof |
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| Publication Number | Publication Date |
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| CN101269665A CN101269665A (en) | 2008-09-24 |
| CN101269665B true CN101269665B (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810105951XA Expired - Fee Related CN101269665B (en) | 2008-05-06 | 2008-05-06 | Axle counting system by using strain detection and implementing method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085842B (en) * | 2013-01-23 | 2015-06-03 | 成都铁路通信设备有限责任公司 | Detection system and detection method of straddle type light rail movable crossover line track sections |
| CN103552581B (en) * | 2013-11-12 | 2016-01-13 | 哈尔滨理工大学 | Wheel sensor |
| CN109572750A (en) * | 2018-12-25 | 2019-04-05 | 深圳科安达电子科技股份有限公司 | Adaptive axis-counting device and adaptometer axle system |
| CN109720376A (en) * | 2018-12-28 | 2019-05-07 | 上海亨钧科技股份有限公司 | A method of vehicle forward direction is judged by axle-counting points |
| CN113581247B (en) * | 2020-04-30 | 2022-10-18 | 比亚迪股份有限公司 | Axle counting device and system of railway vehicle |
| CN112389500B (en) * | 2020-11-30 | 2022-10-25 | 中国铁道科学研究院集团有限公司 | Track axle counting device, system and data processing method |
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