CN85200373U - Dynamic switchless electronic track scale - Google Patents
Dynamic switchless electronic track scale Download PDFInfo
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- CN85200373U CN85200373U CN 85200373 CN85200373U CN85200373U CN 85200373 U CN85200373 U CN 85200373U CN 85200373 CN85200373 CN 85200373 CN 85200373 U CN85200373 U CN 85200373U CN 85200373 U CN85200373 U CN 85200373U
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Abstract
The utility model discloses a dynamic electronic track scale for weighing running trains. The dynamic electronic track scale uses wave characteristics of weighing signals to identify running direction, running speed and running clock, automatically pick out the weights of a train head and a coal water train and cancel additional identification devices, such as a switching value signal device, a logic control unit circuit, an automotive vehicle identifier (ACI), a scanner, etc., traditionally used in the prior art, so that the dynamic switchless electronic track scale is formed. The utility model has the advantages of low cost, low failure rate and high reliability.
Description
The present invention is a kind of dynamic electronic rail balance, can weigh up the weight of train in the train traveling process, comprises automatic identification car type rejecting headstock and tender weight, and can reject guard's van weight.
Existing known dynamic electronic rail balance can be divided into single table surface and many table tops track scale, and it is several that the weighing mode can be divided into axle metering, bogie metering and car load metering, and the Dynamic Weighting precision that is used for the dynamic electronic rail balance of commercial metering is better than 0.5% equivalent.Steel table top (3) level is installed under the rail, and the weighing rail (2) on the table top is what to separate with two ends approach rail (1), makes table top not be subjected to the vibration effect of two ends approach rail and roadbed.Four jiaos of upper ends that are pressed in LOAD CELLS (5) of table top, LOAD CELLS then is placed on the steel pedestal (4).Table top few in number is to be subjected to the LOAD CELLS supporting with the method that hangs, and adopts seldom again because of its structure is huge recently.During train experience table top, weight is supported by LOAD CELLS, and produces the electric signal of weighing by LOAD CELLS, and after the serial or parallel connection combination, row amplifies again.The electrical signal conversion of weighing after analog to digital converter will amplify is the weighing-up wave of digital form, delivers to robot calculator (8).Amplifier (6), analog to digital converter (7) and robot calculator (8) pattern specification are different with different system, and the weighing-up wave of sending into robot calculator can obtain the value of weighing after data processing.Known Processing Algorithm has mathematical mean method, weighted mean method, multiple integration method, average Shanghai ripple method etc., and these algorithm foots can guarantee that the Dynamic Weighting precision of commercial track scale is better than 0.3%.
In order to discern headstock, tender, guard's van and the common four-axle vehicle (railway carriage) in advancing, need the additional recognition device of judging difference between them, this additional recognition device also should energy
Judge which wheel or bogie are to belong to the same railway carriage that should weigh, these weigh that could to obtain correct joint heavy appropriate combination.The additional recognition device of known dynamic electronic rail balance can be the switching value telltale (9) that is contained on approach rail (1) and the weighing rail (2), and may also comprise so-called logic control element circuit (10), perhaps also have automatic vehicle identification device (ACI), scanner etc.
The above-mentioned prior art of contrast that provides all is collected in the 21st phase of railway standardization supplementary issue that railway standardization editorial office publishes in October, 1981, promptly in " track scale metering special edition (two) ".
The objective of the invention is to cancel aforesaid additional recognition device in the prior art, waveform characteristic with weighing-up wave is discerned car type, reject the weight of headstock, tender and guard's van, the weighing-up wave of common four railway carriages is identified, can also discern the direction of traffic and the speed of a motor vehicle simultaneously.Adopt the weighing apparatus of this no switching value telltale technology to can be described as no switch dynamic electronic rail balance, new technology also can abbreviate no switching technique as.
New technology still adopts known table top and LOAD CELLS, installation and prior art indifference.Single table surface dynamic electronic rail balance with the bogie metering as Fig. 1, shown in Figure 3, becomes two groups with the LOAD CELLS serial or parallel connection, and every group of same planimetric position that is positioned at perpendicular to track is called A group and B group.When train passed through table top (3), two groups of LOAD CELLS of A, B produced the electric signal of independently weighing, and are input to analog input channel (7) simultaneously.In the same sampling period, sampling successively to A, the B twice electric signal of weighing in the analog input channel, and converts the weighing-up wave of digital form to, delivers to robot calculator (8).The present invention adopts 14 programmable analog amount input channels (7) at a high speed, and the sampling period gets between 1 millisecond to 20 milliseconds
Suit.To finish the sampling of one analog quantity input signal and analog to digital conversion only need the time of 100 microseconds, so the sampling time difference of A, B twice can not surpass 100 microseconds, can be considered synchronization and adopt.Thus, the analog input channel export two roads independently can be considered synchronization adopt digitized weighing-up wave, correspond respectively to two groups of LOAD CELLS of A, B.
When table top (3) left from left to right by train, the 1st wheel of train constantly earlier arrived A group LOAD CELLS at t0, the weighing-up wave that A, B are two groups at t0 as shown in Figure 4 constantly, only A group weighing-up wave produces sudden change (11).Otherwise when opening table top (3) as if the train right-to-left, as shown in Figure 5, t0 is only B group weighing-up wave generation sudden change (11) constantly.In a word, the train direct of travel is discerned in first sudden change (11) of available weighing-up wave, produces the pairing LOAD CELLS in weighing-up wave road of sudden change (11) at first, is exactly the train LOAD CELLS of process at first.
Generally all do not allow train to quicken when weighing or deceleration, so the identification in a single day of train direct of travel, a train is weighed and is never needed to discern for the second time direct of travel together.The identification direct of travel is indispensable for the directional compensation of dynamic electronic rail balance.
The weighing-up wave of respectively organizing LOAD CELLS of same table top will become a step weighing-up wave squiggle (12) with horizontal bench at different levels through robot calculator (8) superposition.Different train marshalling list will produce different step weighing-up wave squiggles, for example Fig. 6, Fig. 7, and shown in Figure 8.The variation of wheel number on the table top is all represented in the jump (13) of each horizontal bench of weighing-up wave squiggle (12).Wheel of every increase can make curve (12) rising one-level horizontal bench on the table top, and wheel of every minimizing can make curve (12) reduce the one-level horizontal bench.In other words, have only a wheel on one-level horizontal bench (14) the expression table top, on secondary horizontal bench (15) the expression table top two wheels are arranged, three grades of horizontal bench (16) expression platform
Three wheels are arranged, by that analogy on the face.0 grade of horizontal bench (17) is a zero line, and expression does not have wheel to be on the table top.0 grade of horizontal bench between two one-level horizontal bench is defined as " neutral gear ", does not have the gap of wheel during " neutral gear " expression train is advanced on the table top." level " of horizontal bench described here be meant through level and smooth or ignored the vibration of weighing-up wave, in fact only for explanation technical essential face and nonessentially make the weighing-up wave squiggle.
Can discern the variation of wheel on the table top fully by the step characteristic of the above weighing-up wave squiggle; Can identify by the wheel number of table top and the wheel number on the table top general designation wheel number in this explanation.In addition,, remove the length of table top weighing rail (2), promptly obtain the average velocity of this wheel experience table top with the mistiming that same wheel is appeared on the stage and left office.When train was at the uniform velocity advanced, this speed was average speed.In fact the speed of train can change, and the speed of a motor vehicle of therefore trying to achieve each wheel is necessary.The mean value of the several wheel velocities of desirable this railway carriage of speed of one joint railway carriage.According to the velocity variations of adjacent wheel, promptly velocity contrast divided by the mistiming of adjacent wheel, is the average acceleration between this two-wheeled.Described here and mistiming described below, by the real-time clock of robot calculator (8), also can be by the PTM(programmable timer in analog input channel (7)) demarcate metering.
With appearing on the stage mistiming or leave from office mistiming of two wheels, multiply by the average speed of railway carriage or wheel.Promptly obtain the wheelspan of this two-wheeled.Wherein the wheelspan with adjacent wheels is most important, because the wheelspan of adjacent wheels is the main foundation of identification car type.In all car types, for the longest, can discern four railway carriages with the wheelspan length of difference neutral gear (17) with wheelspan between the dish of common four-axle vehicle (skin).For example getting " discriminant value " R is 4.4 meters, and when neutral gear wheelspan length is identified as common four-axle vehicle (skin) during greater than R, this moment, discernible railway carriage accounted for the rolling stock sum
More than 99.99%.Though tender and guard's van also are four, wheelspan can not surpass 3.9 meters between dish, and the guard's van wheelspan of two-wheeled is no more than 4 meters, so tender and guard's van all can identify.In addition, the wheelspan of steam headstock is never above 4 meters.But the trailing wheel of the steam headstock of minority model to " machine-made egg-shaped or honey-comb coal briquets is adjacent " wheelspan " neutral gear " of tender wheel is slightly larger than 4.4 meters.In order to distinguish these headstocks, have two approach available: the first is increased to 4.6 meters or bigger with " discriminant value " R, and when R equaled 4.6 meters, discrimination was more than 99.5% of rolling stock sum (P only
16Type and G
14The type vehicle can not be discerned); When R equaled 4.7 meters, discrimination was more than 99% of rolling stock sum (vehicle that can not discern will increase the G3 type); When R equaled 5 meters, discrimination was that (vehicle that can not discern this moment is P to more than 98.9% of rolling stock number
16, C
17, M
2, K
1, G
3, G
14).When the use scene can not above-mentioned vehicle occur, might as well increase R.It two is that to utilize table top wheel number be that " level " of step discerned the steam headstock, " machine-made egg-shaped or honey-comb coal briquets is adjacent " is greater than 4.4 meters steam headstock, because the driving wheel wheelspan is less, will cause three driving wheels entirely on platform, making the squiggle of weighing three grades of steps (16) occur need only reject three grades of steps (16) together with " neutral gear " greater than 4.4 meters, promptly being unlikely this headstock erroneous judgement is four railway carriages.The both sides, " neutral gear " (17) of four railway carriages are one-level step (14), must be two stage steps (15) more outward, this also is the key character of four railway carriages of identification, the moving of the type that for example advances (QJ type) steam engine headstock is 3.05 meters from wheelspan, machine-made egg-shaped or honey-comb coal briquets is adjacent to be 4.46 meters, both sides, 4.46 meters " neutral gear " (17) in the squiggle, one end is the adjacent two stage steps of an one-level step (14) (15), the other end is the adjacent zero level step of an one-level step (14) (17), supposes that herein table top length is 2.9 meters.
For the dynamic electronic rail balance that uses diesel locomotive and electric locomotive, because the core distance is very big,
So it is not enough only discerning with the neutral gear size.Can increase the bogie fixed wheelbase of differentiating the neutral gear both sides this moment and discern headstock, this be because the wheelspan of internal combustion headstock and electric headstock all greater than 1.8 meters, and the inflexible wheel base overwhelming majority of common four railway carriages is less than 1.8 meters.Bogie fixed wheelbase is more than or equal to 1.32% of 1.8 meters Accounting rolling stock, greater than 0.2% of 1.85 meters Accounting rolling stocks.Can stipulate " wheelspan discriminant value " Q in a word, discern the internal combustion headstock or the electric headstock of big wheelspan.For example, make Q equal 1.85 meters, then every neutral gear makes R equal 4.6 meters greater than R() and the neutral gear both sides two stage steps is respectively arranged, and the pairing adjacent vehicle wheel of this two stage steps is apart from greater than Q, can determine that then this " neutral gear " produced by internal combustion headstock or electric headstock, can be identified as headstock.
Always the above can determine different " discriminant value " R and " wheelspan discriminant value " Q at different scenes, presses following algorithm flow extracts four railway carriages from weighing-up wave effective weighing-up wave, rejects the weighing-up wave of various headstocks and tender, guard's van:
1. calculate wheelspan by step weighing-up wave squiggle (12), the wheelspan that wherein comes across zero level step (17) two ends promptly is " neutral gear ", from the beginning seeks " neutral gear " (17).
2. what " neutral gear " was less than or equal to R can not be four railway carriages, abandons this " neutral gear ", seeks next " neutral gear ".
3. whether when " neutral gear " (17) during greater than R, differentiating both sides, " neutral gear " (17) all has a secondary platform level (15) near one-level step (14).If not like this, illustrate to have run into specific steam headstock, still abandon this " neutral gear ", continue to seek and differentiation next " neutral gear ".If like this, then when this two stage steps
Pairing wheelspan is during greater than Q, as internal combustion headstock or electric headstock and will abandon this " neutral gear ", seeks and differentiates next " neutral gear ".
4. have only when " neutral gear " (17) and the adjacent two stage steps (15) that is close proximity to one-level step (14) is arranged, and be " neutral gear " of both sides wheelspan, just be identified as common four railway carriages " neutral gear " smaller or equal to Q greater than R, both sides.
5. the signal extraction of the adjacent two stage steps near one-level step (14) in four railway carriages " neutral gear " (17) both sides (15) is come out, as effective weighing-up wave of this railway carriage trailing or leading bogie.Remaining signal is all rejected, is abandoned.
Effective weighing-up wave of four railway carriage trailing or leading bogies that extract is handled through known data processing method, obtains bogie weight and save weighing, and also can obtain the weight of train (having rejected headstock, tender and guard's van) after adding up.
Dynamic electronic rail balance for axle metering and car load metering uses technology of the present invention also can constitute no switch dynamic electronic rail balance.The obtained weighing-up wave squiggle of weighing apparatus of axle metering will be made of zero level and one-level horizontal bench entirely, and the speed of a motor vehicle, wheelspan can be discerned equally, and the identification of car type is wheelspan and inflexible wheel base between the dependence dish all.Seek " neutral gear " of wheelspan earlier greater than R, if the wheelspan of such neutral gear both sides is greater than Q, neutral gear is abandoned as internal combustion headstock and electric headstock, in order to distinguish easily mixed mutually steam headstock with four railway carriages, because axle computation weigh signal waveform curve does not have two stage steps, so R must be obtained greatlyyer, for example to get R and equal 5 meters, can sacrifice 1.1% discrimination this moment.Though be subjected to some restriction, still can be used for most on-the-spot.As for the weighing apparatus of car load metering, the step rank of weighing-up wave squiggle will be more some more, and identification problem is than the easier solution of axle metering weighing apparatus, and method is still obtained the speed of a motor vehicle, wheelspan, and is still sharp
, discern greater than R with wheelspan between four railway carriage dishes and inflexible wheel base is not more than these characteristics of Q.
For two table top track scales, the identification of train direct of travel is to differentiate wheel and goes up which table top earlier, four LOAD CELLS serial or parallel connections of same table top can be become one group for this reason, total system is still used the twice amplifier, and the electric signal itself of weighing that LOAD CELLS is delivered to the analog input channel has been exactly the step electric signal of weighing.As for the identification of the speed of a motor vehicle, wheelspan and car type, can take from the weighing-up wave squiggle that wherein any table top produced.
Compared with the prior art, the advantage of technology provided by the present invention is to have cancelled any additional recognition device that is used to discern the speed of a motor vehicle, car type, has cancelled the switching value telltale of traditional use.Cost is not only saved in this improvement, and convenient for maintaining, and improved the reliability of system is because be in the switching value telltale major failure source of dynamic electronic rail balance system just under the open-air rugged surroundings.The present invention makes the no switch dynamic electronic rail balance except being applicable to, also be applicable to the existing transformation that has the dynamic electronic rail balance of additional recognition device, because the present invention increases any equipment hardly, can utilize original table top, sensor, amplifier and robot calculator fully, the system that has need change the analog input channel, and the system that has does not then need to change
In the accompanying drawing: Fig. 1. no switch dynamic electronic rail balance synoptic diagram;
Fig. 2. have the dynamic electronic rail balance synoptic diagram of additional recognition device;
Fig. 3. the signal transmission diagram of no switch dynamic electronic rail balance;
Fig. 4. when train leaves from left to right, the output signal of A, two groups of LOAD CELLS of B;
Fig. 5. when the train right-to-left leaves, A, two groups of LOAD CELLS of B defeated
Go out signal;
Fig. 6. be organized as the weighing-up wave squiggle of advance (QJ type) steam headstock, C50 and C1; Table top length is 3.8 meters.
Fig. 7. be organized as the weighing-up wave squiggle of east wind 1 internal combustion headstock, P3 and C13; Table top length is 3.8 meters.
Fig. 8. be organized as the weighing-up wave squiggle of the electric headstock of 6Y2, M11 and N16; Table top length is 3.8 meters.
Fig. 9. the two table tops of embodiment do not have switch dynamic electronic rail balance synoptic diagram;
Figure 10. the two table tops of embodiment do not have switch dynamic electronic rail balance sensor wiring diagram.
One embodiment of the present of invention as shown in Figure 9.The shallow foundation that adopts sky and water Red Hill testing machine factory to produce is cheated, the weighing table (3) of low table structure, and the weighing mode is two table tops, bogie metering.The high precision spoke type LOAD CELLS (5) of using this factory to produce.The used bridge power supply of LOAD CELLS (5) is high precision that Suzhou Meter's Component Factory the produces formula constant-current supply of floating.Amplifier (6) also is Suzhou Meter's Component Factory's product, and input end zooms into 0-30 millivolt (reaching the 0-120 millivolt after the series connection) electric signal of weighing of LOAD CELLS (5) signal of 0-10 volt for differential type both-end input, this amplifier.The master chip that robot calculator (8) is chosen the manufacturing of U.S. HEATHKIT company is the micromachine system of M6809, and this system is at China called after DJK-100 micromachine system, main memory 64KRAM, is furnished with real-time clock, be with two 5 " floppy disk, one 12 " black and white CRT, one 7 needle printer.Analog input channel (7) is selected from the GTZ-100 process subsystem of Chongqing Industrial Automation Instrumentation Inst.'s exploitation,
The combination of this subsystem different templates can adaptive various computer systems.Analog input channel in the present embodiment (7) is made of three templates, is selected from GTM-160-02, GTM-170-01 and GTM-990-01 in the above-mentioned subsystem series mask.Wherein GTM-160-02 is 14 A/D analogue input templates of high precision, and 16 differential inputs or 32 single-ended input channels can be provided the analog quantity input signal of 0-± 10V, and sample rate is 40 microseconds, and A/D switching time is 25 microseconds.GTM-170-01 is multi-functional A/D programmable interface template; it is multiple that the A/D Starting mode is programmed for the startup of program single-point, automatic continuous startup, interior timing startup, timing startup outward etc.; the passage addressing mode is programmed for that program is given, fixed point continuous coverage, order continuous coverage etc. are multiple; data transfer mode is programmed for program mode (PM) (having comprised Cheng Biao Chi mode, halt mode and interrupt mode) and dma mode; also has programmable timer PTM on the plate as interior timer clock; with 1 microsecond is unit, and the longest fixed time interval can reach 35 minutes.GTM-990-01 is SS-50---EXORCISOR bus converter template, to adopt the DJK-100 mainframe box of SS-50 bus to couple together with the analog input channel cabinet that adopts the EXORCISOR bus, realize the conversion of SS-50 bus to the EXORCISOR bus, this conversion is transparent to the programmer.
The output of four of each table top LOAD CELLS series connection is one analog signals in the present embodiment, and the total twice of total system are weighing-up wave independently, corresponds respectively to two table tops.Sampling period should for example be decided to be 2 milliseconds between 1 millisecond to 20 milliseconds; The weighing-up wave Accounting twice input channel of analog input channel (7), 0-10 lies prostrate single-ended input; The A/D Starting mode should be elected the startup of program single-point as and do interior regularly startup by internal clock; The selection of channel address
Mode should be decided to be the program given way; Data transfer mode should be decided to be Cheng Biao Chi mode or interrupt.Above-mentioned selection is programmed by the programmer, finishes automatically after the start.When weighing, data acquisition is finished automatically by analog input channel (7), and main frame is only looked after analog input channel when start.Analog input channel (7) proposes interrupt request to main frame after sample conversion is finished, partly the time extracts data and discerns in the only change of having no progeny in the response of host.Promptly differentiate effective weighing-up wave that " neutral gear " extracts four railway carriages, withdraw from interruption then, continue to finish work such as the data processing of effective weighing-up wave and necessary printing, demonstration.Therefore, data acquisition, identification, data processing and demonstration are printed and are finished simultaneously.
The wiring that the two table tops of present embodiment do not have 8 LOAD CELLS of switch dynamic electronic rail balance as shown in figure 10.The two table top length of present embodiment are 3.8 meters.
Software programming can divide two partly in the present embodiment, and one is identification module, and the establishment flow process of this program module has been that the foregoing algorithm flow 1-5 of this instructions is illustrated; It two is service modules such as the data processing of effective weighing-up wave and demonstration, printing, warning." average Shanghai ripple method " that present embodiment adopts teacher Fang Dingfei of Hunan University to provide carries out data processing, and this method is published in " railway standardization " supplementary issue the 20 first phase (in October, 1981 publication)---track scale metering special edition (two).The desired programmatics of present embodiment is common, accounts for to deposit about 10K, can be finished by the trainee or the higher grade pupil of general software major.
Claims (1)
1, be used for the advance dynamic electronic rail balance of the weight of train of weighing, can discern and reject the weight of headstock and tender, it is had at least one steel table top (3) of the weighing rail (2) that separates with approach rail (1) and is placed in (4) four jiaos of trains that support weighing rail on the process table top in order to the LOAD CELLS (5) of withstanding four jiaos of table tops of pedestal by the plane, upper end of horizontal setting, obtain to weigh electric signal from LOAD CELLS, send into robot calculator (8) through amplification and analog to digital conversion, with known data processing method can calculate the weight that respectively saves railway carriage and weight and, it is characterized in that: be positioned at that to connect with the LOAD CELLS of the vertical same planimetric position of track be one group, all the LOAD CELLS serial or parallel connection becomes at least two groups, one weighing-up wave of every group of independent formation, through amplifier (6), analog to digital converter (7) is sent into robot calculator (8), constitutes a kind of no switch dynamic electronic rail balance that does not have switching value telltale (9) or other additional recognition device with the weighing-up wave waveform characteristic identification train directions and the car type speed of a motor vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85200373 CN85200373U (en) | 1985-04-01 | 1985-04-01 | Dynamic switchless electronic track scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85200373 CN85200373U (en) | 1985-04-01 | 1985-04-01 | Dynamic switchless electronic track scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85200373U true CN85200373U (en) | 1985-12-20 |
Family
ID=4796736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85200373 Ceased CN85200373U (en) | 1985-04-01 | 1985-04-01 | Dynamic switchless electronic track scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85200373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616064A (en) * | 2013-11-29 | 2014-03-05 | 北京东方瑞威科技发展股份有限公司 | Long-table-face dynamic rail weighbridge weighing system |
| CN104142173A (en) * | 2013-05-08 | 2014-11-12 | 宁波博达电气有限公司 | Digital weighing sensor and wiring method thereof |
-
1985
- 1985-04-01 CN CN 85200373 patent/CN85200373U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142173A (en) * | 2013-05-08 | 2014-11-12 | 宁波博达电气有限公司 | Digital weighing sensor and wiring method thereof |
| CN103616064A (en) * | 2013-11-29 | 2014-03-05 | 北京东方瑞威科技发展股份有限公司 | Long-table-face dynamic rail weighbridge weighing system |
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