CN2378258Y - Railway wheel flat scar signal collecting device - Google Patents
Railway wheel flat scar signal collecting device Download PDFInfo
- Publication number
- CN2378258Y CN2378258Y CN 99217058 CN99217058U CN2378258Y CN 2378258 Y CN2378258 Y CN 2378258Y CN 99217058 CN99217058 CN 99217058 CN 99217058 U CN99217058 U CN 99217058U CN 2378258 Y CN2378258 Y CN 2378258Y
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- rail
- flat scar
- wheel
- railway wheel
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Abstract
The utility model provides a railway wheel flat scar signal collecting device, which comprises a steel rail which is used as a force receiving element of a force transducer. The neutral axis of the steel rail is fixed with strain gauge pieces which can be affixed or welded. The strain gauge pieces are symmetrically installed on both sides of the rail web of the steel rail to form survey areas, and the strain gauge pieces of the survey areas are connected to form a wheatstone bridge. The railway wheel flat scar signal collecting device of the utility model has simple circuits, reduces the equipment cost, and can detect the size of a flat scar in nemberical quantities.
Description
The utility model relates to a kind of signal pickup assembly, the flat scar signal pickup assembly of especially a kind of railway wheel.
In the railroad track transportation, wheel tread the part usually occurs and abrades, peels off, falls defectives such as piece, and people's system is referred to as flat scar.At present, known wheel flat device for dynamically detecting has the electric signal of employing formula detecting device, vibration acceleration formula detecting device, friction stress formula detecting device etc.
Wherein, the shortcoming of electric signal formula detecting device is that train speed is required harshness, workstation must be AT STATION several kilometers with place far away, communication line is long, the cost height, personal management is very inconvenient.In addition, adopting this detecting device need cut off rail, is that 1.5 meters insulation rail seals in the operating line with several length, has in use had a strong impact on traffic safety and permanent way maintenance.
It is very big that vibration acceleration formula detecting device is influenced by adjacent wheel, and measuring accuracy is not high, and can not quantitatively detect the size of flat scar, can only be qualitatively flat scar be divided into little, in, big three ranks.
Friction stress formula detecting device needs amplification channel too many, the equipment complexity, and the cost height, maintenance load is big.
The purpose of this utility model is that a kind of above-mentioned defective that overcomes will be provided, and is simple in structure, and test is accurate, and equipment cost is low, and maintenance load is little, at the flat scar signal pickup assembly of railway wheel that dynamically can detect flat scar size down quantitatively.
The purpose of this utility model is achieved in that the flat scar signal pickup assembly of described railway wheel comprises: as the rail of the force-summing element of force transducer, but on the neutral axis of rail, be fixed with Pasting or welding strain sheet, described strain-gauge symmetry is installed in rail web of the rail both sides and forms the survey district, and each strain-gauge of surveying the district is connected into electric balance.
The flat scar signal pickup assembly of a kind of railway wheel circuit that the utility model proposes is simple, and test has accurately reduced the cost of equipment, and can detect the size of flat scar quantitatively.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Figure 1A is provided with two structural representations of surveying the district according to the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes;
Figure 1B is provided with four structural representations of surveying the district according to the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes;
Fig. 2 is the front view according to the bridge circuit strain-gauge of the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes;
Fig. 3 is the lateral plan according to the bridge circuit strain-gauge of the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes;
Fig. 4 is the bridge circuit figure according to the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes;
Fig. 5 is the rail stress signal graph according to the no flat scar wheel of the flat scar signal pickup assembly actual measurement of a kind of railway wheel that the utility model proposes;
Fig. 6 is the rail stress signal graph that flat scar wheel is arranged according to the flat scar signal pickup assembly actual measurement of a kind of railway wheel that the utility model proposes.
Below in conjunction with accompanying drawing and most preferred embodiment thereof the concrete structure that the utility model proposes is further described.
As shown in Figures 1 to 4, the flat scar signal pickup assembly of a kind of railway wheel that the utility model proposes comprises: as the rail 1 of the force-summing element of force transducer, but on the neutral axis of rail 1, be fixed with Pasting or welding strain sheet 2,2 ', described strain-gauge 2,2 ' symmetry are installed in rail web of the rail both sides and form the survey district, and each strain-gauge 2,2 ' of surveying the district is connected into electric balance.
Shown in Figure 1A, on every side rail of circuit, be provided with two and survey district A, B, form two bridge circuits respectively, each surveys the length of distinguishing is not less than wheel circumference half, but must be less than 1.8 meters, each is surveyed in the district 12-14 measuring point is set, and each measuring point spacing is 12 ± 4cm.When wheel circumference is about 3 meters, wheel-base bogie is about 1.8 meters, so in order to distinguish the signal of same former and later two wheels of bogie truck, must avoid two wheels to fall into one simultaneously surveys in the scope of distinguishing, therefore, each surveys the length in district must be less than 1.8 meters, but should be greater than half of wheel circumference, promptly 1.5 meters, then two timing lengths are about 3 meters.
Shown in Figure 1B, in order to improve measuring accuracy, can on every side rail, be provided with four and survey district C, D, E, F, form four bridge circuits respectively, can obviously improve the amplitude of test signal, help the identification of flat scar signal.Like this, each length of surveying the district is 1/4th of wheel circumference, and each is surveyed the district 6-7 measuring point is set, and the spacing of each measuring point is 12 ± 4cm.
But each measuring point can adopt two rectangular rosette type welding strain sheets, with point welder they are fixed on the neutral axis of rail web of the rail both sides, a strain-gauge in the rectangular rosette is vertical with neutral axis, be active gage, be responsible for gathering the signal of the suffered vertical power of rail, the another strain-gauge is parallel with neutral axis, is compensating plate, plays the effect of temperature compensating.
Fig. 2 surveys the strain-gauge that the district is provided with 4 shown in Figure 1B, if adopt 2 to survey the district, strain-gauge quantity wherein should double.R1 and R7 among Fig. 2 (R1 ' and R7 '), R2 and R8 (R2 ' and R8 '), R3 and R9 (R3 ' and R9 '), R4 and R10 (R4 ' and R10 '), R5 and R11 (R5 ' and R11 '), R6 and R12 (R6 ' and R12 ') are respectively same rectangular rosette.Wherein the direction of strain-gauge R1 to R6 (R1 ' to R6 ') wire grid is vertical with the rail neutral axis, is called active gage.When wheel runs over the rail at measuring point place, rail generation compressive deformation, active gage deforms with rail, and its resistance value is corresponding to change, and provides and the proportional strain signal of wheel impacts load.The direction of strain-gauge R7 to R12 (R7 ' to R12 ') wire grid is parallel with the rail neutral axis, be the temperature compensating sheet, when wheel runs over the rail at measuring point place, the rail neutral axis does not deform, and its resistance value does not change, still, when ambient temperature changes, it will change with active gage, reduce the zero creep of electric bridge, play the effect of temperature compensating.
The test error that causes for fear of the wheel unbalance loading, as shown in Figure 3, at rail both sides paster.
When the rail at train passes through tested points place, include the signal of quasistatic vertical power of wheel and the impact signal of wheel flat in the bridge circuit output signal, stress signal when wheel does not have flat scar as shown in Figure 5, the impact signal of the wheel flat when wheel has flat scar is as shown in Figure 6.
After above-mentioned signal made amplification, analogue to digital conversion and Computer Processing, can calculate the size of impulsive force and the size of flat scar.
When wheel diameter is 915 millimeters, when girth is about 2.88 meters, in every strain-gauge spacing is 12 centimetres, need 24 measuring points, can suitably increase or reduce measuring point as the case may be, for fear of the influence of neighbour's wheel, it is formed 2 or 4 electric bridges respectively, so only can in whole wheel circumference scope, carry out flat scar test with 2 or 4 amplification channels.
On the rail of circuit both sides, all carry out flat scar test as need, then strain-gauge can be arranged on two strands of rail simultaneously and realize.
Described device not only can be tested the flat scar of locomotive wheel, also can be used for the detection to the super unbalance loading of train.
Claims (3)
1. flat scar signal pickup assembly of railway wheel, it is characterized in that: this device comprises: as the rail of the force-summing element of force transducer, but on the neutral axis of rail, be fixed with Pasting or welding strain sheet, described strain-gauge symmetry is installed in rail web of the rail both sides and forms the survey district, and each strain-gauge of surveying the district is connected into electric balance.
2. the flat scar signal pickup assembly of a kind of railway wheel according to claim 1 is characterized in that: can be provided with two or four and survey the district in the rail length range of whole wheel circumference.
3. the flat scar signal pickup assembly of a kind of railway wheel according to claim 1 is characterized in that: be provided with two and survey when distinguishing in the rail length range of whole wheel circumference, each surveys the length of distinguishing is not less than wheel circumference half, but less than 1.8 meters; When four survey districts were set, each length of surveying the district was 1/4th of wheel circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99217058 CN2378258Y (en) | 1999-07-22 | 1999-07-22 | Railway wheel flat scar signal collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99217058 CN2378258Y (en) | 1999-07-22 | 1999-07-22 | Railway wheel flat scar signal collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2378258Y true CN2378258Y (en) | 2000-05-17 |
Family
ID=34008572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99217058 Expired - Fee Related CN2378258Y (en) | 1999-07-22 | 1999-07-22 | Railway wheel flat scar signal collecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2378258Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014162270A3 (en) * | 2013-04-01 | 2014-12-18 | Universidad Eafit | System for detecting defects in the roundness of railway vehicle wheels |
| CN106428110A (en) * | 2016-11-10 | 2017-02-22 | 湖南工业大学 | Real-time locomotive wheelset fault monitoring device |
| CN107406090A (en) * | 2015-01-16 | 2017-11-28 | 国际电子机械公司 | abnormal vehicle dynamic detection |
| CN108944998A (en) * | 2018-07-23 | 2018-12-07 | 清华大学天津高端装备研究院 | A kind of detection of train wheel and maintenance system |
| CN113280747A (en) * | 2021-04-22 | 2021-08-20 | 杭州申昊科技股份有限公司 | System and method for judging rail safety based on fiber grating sensor |
| RU2784392C1 (en) * | 2021-12-24 | 2022-11-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет путей сообщения" (СГУПС) г. Новосибирск | Method for testing the rolling surface of railway wheels in motion |
-
1999
- 1999-07-22 CN CN 99217058 patent/CN2378258Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014162270A3 (en) * | 2013-04-01 | 2014-12-18 | Universidad Eafit | System for detecting defects in the roundness of railway vehicle wheels |
| CN107406090A (en) * | 2015-01-16 | 2017-11-28 | 国际电子机械公司 | abnormal vehicle dynamic detection |
| CN107406090B (en) * | 2015-01-16 | 2020-11-20 | 国际电子机械公司 | Abnormal vehicle dynamics detection |
| CN106428110A (en) * | 2016-11-10 | 2017-02-22 | 湖南工业大学 | Real-time locomotive wheelset fault monitoring device |
| CN108944998A (en) * | 2018-07-23 | 2018-12-07 | 清华大学天津高端装备研究院 | A kind of detection of train wheel and maintenance system |
| CN113280747A (en) * | 2021-04-22 | 2021-08-20 | 杭州申昊科技股份有限公司 | System and method for judging rail safety based on fiber grating sensor |
| RU2784392C1 (en) * | 2021-12-24 | 2022-11-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет путей сообщения" (СГУПС) г. Новосибирск | Method for testing the rolling surface of railway wheels in motion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |