CN1061093A - Dynamic weighing device for goods train - Google Patents
Dynamic weighing device for goods train Download PDFInfo
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- CN1061093A CN1061093A CN 90108731 CN90108731A CN1061093A CN 1061093 A CN1061093 A CN 1061093A CN 90108731 CN90108731 CN 90108731 CN 90108731 A CN90108731 A CN 90108731A CN 1061093 A CN1061093 A CN 1061093A
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- sensor
- goods train
- locomotive
- weighing device
- rail
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Abstract
A kind of dynamic weighing device for goods train, employing is installed in the bolt-type LOAD CELLS of rail waist taper hole inside and outside shell band boss, can be 60km/h automatic weighing goods train weight when following at train running speed, can discern the traffic direction and the speed of a motor vehicle, car type automatically, and can get rid of locomotive and tender, automatically differentiate overloading wagon and unbalance loading situation, constitute the higher no foundation ditch wheel metering-type goods train dynamic weigher of a kind of weighing precision, cost is low, failure factor is few, reliability is high.
Description
The present invention relates to the weighing device in a kind of rolling stock motion process.It comprises following architectural feature: LOAD CELLS and direction identificating sensor are installed on rail; Signal by LOAD CELLS output is imported robot calculator behind the amplifier input analog-to-digital converter; Signal by direction identificating sensor output is imported computing machine behind direction identification and control module, weighing results is revised.Net result is got by printer and is shown by display.
1989 the 7th phases of Japan's " republicanism skill newspaper " magazine the 1st～8 page of this dynamic weigher of having reported the employing of present Japan.Its objective is is in operation measures each wheel load of vehicle, and vehicle is super, the unbalance loading situation thereby hold, prevent because super, unbalance loading causes off-axis, cut spool, climb the generation of rail and train overturning accident.Its formation is that several bolt-type LOAD CELLS are installed in rail web of the rail portion taper hole, convert wheel load to voltage signal in turn by each LOAD CELLS, after amplifier amplifies by low pass filter filters out high frequency interference component, then by data control unit to two measuring point wheel load samples of signal and carry out mould/number conversion, then undertaken depositing data in storer after moving average is handled, print in case of necessity, show by robot calculator; On the other hand, by a number detector according to the family curve of wheel load signal differentiate a number and each car the number of axle and with data send into high speed processing portion to each wheel load of each car overload, the calculation process of unbalance loading, when unusual vehicle, by printer data are printed, send warning simultaneously.
This no foundation ditch wheel metering-type goods train dynamic weigher is to detecting truck wheel load automatically under higher travelling speed, hold overload, unbalance loading situation, guarantee traffic safety, play a positive role, having solved goods train has degree of precision in the fair speed operational process the problem of weighing, is a technical much progress.But also exist the some shortcomings part, at first, this device is for carrying out two-way weighing, need two covers to be installed in the identical LOAD CELLS of rail different parts, make the device structure complexity, failure factor increases, cost up, secondly, do not relate to the means of getting rid of locomotive (containing tender) and lorry type identification in the above-mentioned prior art, therefore be not suitable for locomotive, lorry is of a great variety, accurately weighing under the different situation of structure, moreover LOAD CELLS is to cooperate the significant shear stress that bears the wheel weight generation by its conical surface and web of the rail taper hole closely connected in the above-mentioned prior art, therefore, the processing technology of the sensor conical surface and web of the rail taper hole requires too high, and small processing and alignment error will impair both contact position and rail neutral axis positioning requirements at 45, measures the precision reduction thereby make.
The objective of the invention is to avoid above-mentioned weak point of the prior art and provide a kind of and can take by weighing wheel load with the LOAD CELLS of negligible amounts, can discern vehicle and get rid of locomotive, the more rational dynamic weighing device for goods train of the higher structure of measuring accuracy from two different directions goods train.
Purpose of the present invention can reach by following measure: the switching device shifter that is made of a plurality of change-over switches that links to each other with direction identification and control module is set between amplifier and analog to digital converter; Between switching device shifter and robot calculator, locomotive rejected unit and the vehicle recognition unit that links to each other with switching device shifter is set side by side with analog to digital converter and counting shaft with axle counter unit; Locomotive is set in the rail side gets rid of sensor and vehicle identification sensor.
Purpose of the present invention can also reach by following measure: two groups of switches of switching device shifter are controlled its sequence of movement by current of traffic; The locomotive rejected unit is made of two above counters, an above XOR gate and an above phase inverter; Locomotive is got rid of sensor and is made of two sensors.Between two sensors distance is set must not be less than the maximum axle spacing of all adjacent shafts of locomotive, sensor is induction type or photo-electric; The vehicle recognition unit is by three above triggers and constitute with door more than one; The vehicle identification sensor constitutes with upper sensor by two, and the distance that is provided with between the sensor must not be greater than the minimum wheelbase of roller bearing adapter stabilizer bar; Be installed on the bolt-type LOAD CELLS in the rail waist neutral axis taper hole, four symmetrical rib shape conical surface boss that are mutually 90 ° are arranged on its shell; It is 45 ° that the installation of LOAD CELLS should make its conical surface boss and rail neutral axis angle.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a general layout block diagram of the present invention;
Fig. 2 is a locomotive rejected unit wiring diagram;
Fig. 3 is lorry type identification unit line figure;
Fig. 3 A is the voltage oscillogram that I is ordered;
Fig. 3 B is the voltage oscillogram that J is ordered;
Fig. 3 C is the voltage oscillogram that M is ordered;
Fig. 3 D is the voltage oscillogram that N is ordered;
Fig. 4 is the line graph of LOAD CELLS (1) and switching device shifter (6);
Fig. 5 gets rid of the line graph of sensor (2) and switching device shifter (6) for locomotive;
Fig. 6 is the line graph of vehicle identification sensor (3) and switching device shifter (6);
Fig. 7 is LOAD CELLS (a 1) shell mechanism synoptic diagram;
The invention will be further described below in conjunction with (accompanying drawing) embodiment:
The principle of work of each several part is as follows among Fig. 1.When the train of being weighed from a certain direction when weighing section, direction identificating sensor (4) at first produces traffic direction sign signal, the one group switch of this signal in direction identification and control module (7) control switch device (6) given robot calculator (12) one Directional Sign voltage signals simultaneously the value of weighing revised; Produce a weight voltage signal during wheel process LOAD CELLS (1), after amplifier (5) amplifies,, after analog to digital converter (8) carries out the digitizing conversion, send into robot calculator (12) by switching device shifter (6) transposing order; The signal of locomotive eliminating sensor (2) and vehicle identification sensor (3) output sends into earlier locomotive deliverying unit (9) behind switching device shifter (6) conversion sequence respectively and vehicle recognition unit (10) carries out the logical combination processing to signal, the signal of locomotive and the waveform with vehicle feature have been got rid of in output respectively, robot calculator (12) is gathered the wheel load signal, be to adopt known digital averaging method or weighted mean method or integral method to carry out data processing, obtain each the wheel load value of train and the gross weight of each vehicle; Robot calculator (12) is also gathered the vehicle signature waveform and is carried out computing, obtain representing that the eigenwert of type of vehicle also compares all types of lorry eigenwerts of this eigenwert and robot calculator (12) internal memory, find out the deadweight that belongs to a vehicle in the internal memory together and the nominal load-carrying judgement that overloads, carry out the unbalance loading amount with known unbalance loading formula thereafter and calculate.Show by display (14) at last and print weighing results and super unbalance loading is calculated, result of determination by printer (13).
When train from other direction when weighing section, the principle of work of each several part and order are same as described above, difference only to be switching device shifter (6) recipient to identification and control module (7) control make its another group switch motion remains unchanged thereby make by the wheel load signal of the relative current of traffic of switching device shifter (6) output, the order that locomotive is discharged signal, vehicle identification signal three.
Locomotive among Fig. 1 is got rid of sensor (2) and is made of two known induction types or electro-optical pickoff, and the distance between them must not be less than the maximum axle spacing of all adjacent shafts of locomotive; The purpose of Bu Zhiing is first bogie during by these two sensors (2) that makes lorry behind locomotive and the machine like this, and the potential pulse number that two sensors (2) produces equates.
Vehicle identification sensor (3) among Fig. 1 also is made of two known induction types or electro-optical pickoff, and the distance between them must not be greater than the minimum wheelbase of roller bearing adapter stabilizer bar; The purpose of Bu Zhiing is the signal that the signal that produces when making first wheel shaft that the sequential relationship of the wheel signal that produces along first sensor of traffic direction and second sensor remains the lorry forecarriage through second sensor produces when being ahead of second wheel shaft through first sensor like this; The signal sequence relation was as the same when the trailing bogie wheel shaft passed through sensor (3).
Locomotive deliverying unit circuit as shown in Figure 2, it comprises two counter A and B, XOR gate C, a phase inverter D, input end F and H are connected on the output terminal of switching device shifter (6).The logic function of XOR gate C is the input signal when its input end when identical, and output terminal is a low level, otherwise is high level.In order to improve the quiescent voltage of two counter A and B input end, at supply voltage V
CcAnd be provided with two between the ground wire respectively by resistance R
1And R
2, capacitor C
1And resistance R
3And R
4, capacitor C
2Form every straight minute hydraulic circuit.Like this, when locomotive and first bogie of lorry were got rid of sensor (2) by locomotive, the accumulative total of two counter A and B was identical, makes XOR gate C output low level, and through phase inverter D output high level, signal is sent into computing machine, can be judged as locomotive and pass through.
Lorry type identification unit line as shown in Figure 3, it includes three trigger A, B, C and one two input end and a door D, the input end of the positive logic output terminal of trigger A and trigger C with link to each other with the input end of door D, the negative logic output terminal of trigger B with link to each other with another input end of door D, the input end I and the J of this unit are connected on the output terminal of switching device shifter (6).In order to improve the quiescent voltage of trigger A and B input end, at supply voltage V
CcAnd also be provided with two between the ground wire respectively by resistance R
1And R
2, capacitor C
1And resistance R
3And R
4, capacitor C
2Form every straight minute hydraulic circuit.Like this, when lorry when two vehicle identification sensors (3), along the sequential relationship of the output pulse signal of first and second sensors of lorry traffic direction promptly shown in Fig. 3 A and Fig. 3 B.The input end of trigger A, B, C whenever receives the rising edge of a pulse waveform, and the output terminal logic level promptly produces saltus step.Wheel is through before the sensor, and the positive logic output terminal of trigger A and C is a low level voltage, and the negative logic output terminal of trigger B is a high level voltage; Therefore, by above-mentioned trigger theory work, can obtain the positive logic output terminal waveform of trigger C from Fig. 3 A and Fig. 3 B pulsating wave sequential relationship, shown in Fig. 3 C and with the output terminal waveform of door D, shown in Fig. 3 D.
Each square width among Fig. 3 C is represented first wheel shaft of each lorry and the time t that the third round beam warp is crossed first vehicle identification sensor
2According to known vehicle structure, first and third round axle base roller bearing adapter stabilizer bar centre distance L just.
Per two square widths among Fig. 3 D represent that first of each lorry crosses the time t of two vehicle identification sensors (3) to the third round beam warp
1
Because the distance of two vehicle identification sensors (3) can be given first setting, can think that speed V was constant when same lorry was by sensor (3) simultaneously, so:
V= (L)/(t
2) = (S)/(t
1) ……（1）
Can draw by formula (1):
L = (t
2)/(t
1) · s ……（2）
Can find out significantly by formula (2), if with computer acquisition to signature waveform in t
2And t
1The merchant and internal memory in give the sensor (3) that deposits in earlier actual distance value S multiply each other, just can obtain representing the eigenwert of all kinds of vehicles, i.e. bogie pivot center L; To compare according to the eigenwert of all kinds of vehicles in eigenwert that calculates and the internal memory, obtain the nominal load-carrying of corresponding vehicle and deadweight thereof, just can carry out unbalance loading and judge.
Present embodiment computer determination t
1And t
2Method be, the positive logic output terminal of trigger C with link to each other with a PIO interface of computing machine with the output terminal of door D, will collect t by computing machine accumulation
1And t
2For the sampling number and the sampling period of high level multiply each other, can obtain time t
1And t
2
The line graph of LOAD CELLS (1) and switching device shifter (6) as shown in Figure 4.It comprises four LOAD CELLS T
1, T
2, T
3, T
4, four amplifier A
1, A
2, A
3, A
4, also comprise four K in the switching device shifter
2Group switch and four K
2The group switch, the output terminal of these two groups of switches links to each other with the input end of analog to digital converter.When train from V
1(V
1＜when 60Km/h) direction is through LOAD CELLS, K
1The group switch closure makes the wheel load signal that enters analog to digital converter B, D end corresponding to the truck wheel load signal along the current of traffic left side; The wheel load signal that enters analog to digital converter C and E end is corresponding to the wheel load signal on lorry right side, and the B end signal is ahead of the D end signal, and the C end signal is ahead of the E end signal.When train from V
2(V
2＜when 60Km/h) direction is through LOAD CELLS (1), the K of switching device shifter (6)
2The group switch motion makes the truck wheel load signal of B, D end output along the working direction left side, the wheel load signal on C, E end output lorry right side.And sequential relationship remains unchanged.Like this, computing machine just can correctly be gathered each wheel load value of each vehicle.
The line graph of locomotive eliminating sensor (2) and switching device shifter (6) as shown in Figure 5.It comprises two sensor S
1And S
2K in the switching device shifter (6)
1Group switch and K
2Output terminal F, the H of group switch link to each other with locomotive rejected unit (9).Its principle of work is, when train from V
1(V
1＜60 kilometers/time) direction process sensor S
1And S
2The time, K
1The group switch motion makes the signal of output terminal F be ahead of the signal of output terminal H; When train from V
2(V
2＜60 kilometers/time) direction process sensor S
2And S
1The time, K
2The group switch closure, the signal sequence that output terminal F and H are sent remains unchanged, and promptly the F end signal is ahead of the H end signal.
The line graph of vehicle identification sensor (3) and switching device shifter (6) as shown in Figure 6.It comprises two vehicle identification sensor X
1And X
2K in the switching device shifter (6)
1Group switch and K
2The group switch, its output terminal I links to each other with the vehicle recognition unit with J, and principle of work is same as described above.
Fig. 7 is LOAD CELLS of the present invention (a 1) shell mechanism cut-open view.LOAD CELLS of the present invention (1) adopts web of the rail shear strain method to measure wheel load.According to mechanics principle, two sleepers of track and top rail thereof are equivalent to a free beam, sleeper is equivalent to fulcrum, when vehicle wheel reloads on the rail, the xsect of rail produces shearing force, on the neutral axis of rail be pure shear two to strain regime, the direction of two principle stresses and the angle of neutral axis are 45 °.Bolt-type LOAD CELLS (1) shell of the present invention design is provided with four rib shape conical surface boss that are mutually 90 °, relies on the principle stress that bears rail that contacts of the endoporus conical surface on these four boss and the rail neutral axis.This shell mechanism has overcome LOAD CELLS that profile is the conical surface because the error of self or rail taper hole out-of-roundness causes both to depart from principal direction of stress by surface of contact, thus the shortcoming that precision is reduced.
The best orientation that LOAD CELLS of the present invention is installed is that to make the angle of four rib shapes of sensor conical surface boss and rail neutral axis be 45 °.
The present invention compared with prior art has following advantage:
1, can automatically get rid of locomotive wheel weight;
2, can automatically identify the vehicle of lorry, automatically differentiate the overload condition of lorry;
3, can carry out two-way weighing with less LOAD CELLS, simplify apparatus structure, improve the reliability of equipment, reduce investment.
4, the shell mechanism of LOAD CELLS helps improving the precision of sensor.Thereby improved system accuracy.
Claims (8)
1, a kind of dynamic weighing device for goods train, it is by the bolt-type LOAD CELLS (1), direction identificating sensor (4), the amplifier (5) that are installed in the rail waist neutral axis taper hole, direction identification and control module (7), analog to digital converter (8), robot calculator (12), printer (13), display (14) are formed, and it is characterized in that: (A) be provided with between amplifier (5) and analog to digital converter (8) and discern with direction and switching device shifter (6) that control module (7) links to each other is made of a plurality of change-over switches; (B) between switching device shifter (6) and robot calculator (12), locomotive and tender rejected unit (9) and the vehicle recognition unit (10) that links to each other with switching device shifter (6) is set side by side with analog to digital converter (8) and counting shaft with axle counter unit (11); (C) locomotive is set in the rail side and gets rid of sensor (2) and vehicle identification sensor (3).
2,, it is characterized in that two groups of switches of switching device shifter (6) are controlled its sequence of movement by current of traffic according to the described dynamic weighing device for goods train of claim 1.
3,, it is characterized in that locomotive and tender rejected unit (9) are made of two above counters, an above XOR gate and an above phase inverter according to the described dynamic weighing device for goods train of claim 1.
4, according to claim 1 or 3 described dynamic weighing device for goods train, it is characterized in that locomotive and tender get rid of sensor (2) and be made of two sensors, between two sensors distance is set must not be less than the maximum axle spacing of all adjacent shafts of locomotive; Sensor is induction type or photo-electric.
5,, it is characterized in that vehicle recognition unit (10) is by three above triggers with constitute with door more than one according to the described dynamic weighing device for goods train of claim 1.
6, according to claim 1 or 5 described dynamic weighing device for goods train, it is characterized in that the vehicle identification sensor constitutes with upper sensor by two, the distance that is provided with between the sensor must not be greater than the minimum wheelbase of roller bearing adapter stabilizer bar.
7, according to the described goods train dynamic weigher of claim 1, it is characterized in that being installed on the bolt-type LOAD CELLS (1) in the rail waist neutral axis taper hole, four symmetrical rib shape conical surface boss that are mutually 90 ° are arranged on its shell.
8, according to claim 1 or 7 described goods train weighing devices, it is characterized in that the installation of LOAD CELLS should be on the neutral axis of rail waist, its conical surface boss and rail neutral axis angle are 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108731 CN1061093A (en) | 1990-10-31 | 1990-10-31 | Dynamic weighing device for goods train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108731 CN1061093A (en) | 1990-10-31 | 1990-10-31 | Dynamic weighing device for goods train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1061093A true CN1061093A (en) | 1992-05-13 |
Family
ID=4881102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90108731 Pending CN1061093A (en) | 1990-10-31 | 1990-10-31 | Dynamic weighing device for goods train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1061093A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460256C (en) * | 2006-11-22 | 2009-02-11 | 北京东方瑞威科技发展有限公司 | Optical fibre unbalance loading apparatus |
| WO2012051937A1 (en) * | 2010-10-21 | 2012-04-26 | 北京东方瑞威科技发展有限公司 | Embedded railroad track scale weighing system capable of weighing unbalanced load |
| CN113375777A (en) * | 2021-08-16 | 2021-09-10 | 山东矩阵软件工程股份有限公司 | Overload detection method and overload detection system for train |
-
1990
- 1990-10-31 CN CN 90108731 patent/CN1061093A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460256C (en) * | 2006-11-22 | 2009-02-11 | 北京东方瑞威科技发展有限公司 | Optical fibre unbalance loading apparatus |
| WO2012051937A1 (en) * | 2010-10-21 | 2012-04-26 | 北京东方瑞威科技发展有限公司 | Embedded railroad track scale weighing system capable of weighing unbalanced load |
| CN113375777A (en) * | 2021-08-16 | 2021-09-10 | 山东矩阵软件工程股份有限公司 | Overload detection method and overload detection system for train |
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