CN105292178A - On-line wheel diameter measurement method for tramcars - Google Patents
On-line wheel diameter measurement method for tramcars Download PDFInfo
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- CN105292178A CN105292178A CN201510657099.7A CN201510657099A CN105292178A CN 105292178 A CN105292178 A CN 105292178A CN 201510657099 A CN201510657099 A CN 201510657099A CN 105292178 A CN105292178 A CN 105292178A
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- 238000000691 measurement method Methods 0.000 title abstract 4
- 238000003384 imaging method Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 20
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
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Abstract
An on-line wheel diameter measurement method for tramcars comprises the steps of (1), obtaining images and providing a set of imaging modules, wherein the imaging modules comprise a first high-speed camera, a second high-speed camera, a first laser light source, a second laser light source and a locating sensor, and the distance between the view field center of the first high-speed camera and the view field center of the second high-speed camera is L in the track direction; (2), detecting the offset distance and triggering the first high-speed camera and the second high-speed camera to take pictures of a wheel when the locating sensor senses that the lowest point of the wheel presses a track corresponding to the locating sensor; (3), calculating the diameter D of the wheel according to the offset distance of the view field centers corresponding to end points P1 and P2 in the pictures and the distance L between the view field center of the first high-speed camera and the view field center of the second high-speed camera. According to the on-line wheel diameter measurement method, the diameter of the wheel of the tramcars can be directly measured, measurement is accurate, the error is small, and accumulated errors caused by indirect measurement are avoided. The on-line wheel diameter measurement method is simple and fast.
Description
Technical field
The present invention relates to a kind of wheel diameter method of measurement, particularly relate to a kind of online tramway train wheel diameter method of measurement.
Background technology
Wheel is the critical component of railcar train running gear, is the part that train contacts with rail, be also industry said take turns right.And the important parameter that wheel diameter runs as train wheel, be related to train traffic safety, wheel diameter deviation value will cause the accidents such as train off-axis, rollover, derailing too greatly, therefore, for guaranteeing the safety of train driving, wheel diameter is measured accurately very necessary.
Owing to having the shelters such as pilot, blast tube, magnetic rail brake device near tramway train wheel, common diameter detection method is inapplicable.At present, domestic train wheel examine of diameter is mainly divided into Static Detection and detection of dynamic two parts, and when adopting Static Detection, real-time is poor, at substantial manpower, and efficiency is low.And car inspection and maintenance acts out one's plan maintenance, the wheel parameter changing condition of operational vehicle and catastrophic failure not easily Timeliness coverage, and hand inspection work capacity is large, easily occurs undetected.
Adopt the mode of detection of dynamic can make up the deficiency of Static Detection to a certain extent, reduce the work capacity detected, current detection of dynamic mostly in the industry is employing indirect measure, the system complex of this kind of amount of there not being mode, poor stability, installation and maintenance amount are comparatively large and measured error is difficult to arrival requirement, reliability is not high, thus make train in the process of moving, there is potential safety hazard.
Summary of the invention
Based on this, be necessary for deficiency of the prior art, the online tramway train wheel diameter method of measurement that a kind of direct measurement diameter, accuracy rate are high is provided.
A kind of online tramway train wheel diameter method of measurement, this wheel diameter method of measurement comprises the steps:
Step (1): obtain image, one group of imaging modules is provided, this imaging modules comprises the first high speed camera, the second high speed camera, the first LASER Light Source, the second LASER Light Source and alignment sensor, described imaging modules is installed on the inner side of track, described first LASER Light Source, the first high speed camera, alignment sensor, the second high speed camera, the second LASER Light Source are arranged in order from left to right, and described alignment sensor is arranged between the first high speed camera and the second high speed camera between two parties; The distance of the relative position of the field of view center of described first high speed camera and the field of view center direction along ng a path of the second high speed camera is L;
When the wheel of train is through the top of imaging modules, described alignment sensor senses that the nadir of wheel is pressed in the position of track corresponding to orientation sensing, and described alignment sensor triggers the first high speed camera and take pictures in the side of the second high speed camera to wheel; Now the first high speed camera and the second high speed camera photographed the photo that wheel is parallel to the piece wheel wheel rim at end points P1, P2 place at the two ends of the diameter line of track respectively, and described end points P1 is positioned at the high order end that the first high speed camera is taken a picture, end points P2 is positioned at the right-hand member that the second high speed camera is taken a picture;
Step (2): detect offset distance, photographed photo is back in a central process unit and measures by described imaging modules; And the position of the end points P2 of the rightmost side at wheel edge in the photo clapped of end points P1 on the leftmost side at wheel edge in detecting the photo that described first high speed camera is taken and the second high speed camera, in photo, set the position of the first high speed camera and the second high speed camera field of view center respectively; Take track as X-axis coordinate line, the field of view center of the field of view center of the first high speed camera that the end points P1 of central process unit comparison film is relatively corresponding, the second high speed camera that end points P2 is relatively corresponding is measured at the offset distance of X-direction;
Step (3): calculate wheel diameter, calculates the diameter D of wheel at the offset distance of X-direction according to the relatively corresponding field of view center of the first high speed camera of end points P1, end points P2 in photo, the field of view center of the second high speed camera; The offset distance of the field of view center of the first high speed camera that end points P1 is relatively corresponding is in the X-axis direction L1, and the offset distance of the field of view center of the second high speed camera that end points P2 is relatively corresponding is in the X-axis direction L2, then D=L+L1+L2.
Further, in described step (1), the visual field width of described first high speed camera and the second high speed camera is less than or equal to 140mm.
Further, in described step (3), described end points P1 is positioned at the left side of the field of view center of the first high speed camera, then offset distance L1 is positive, otherwise on the right side of being positioned at, then offset distance L1 is negative value; Described some P2 is positioned at the right side of the field of view center of the second high speed camera, then offset distance L2 is positive, otherwise on the left of being positioned at, then offset distance L2 is negative value.
Compared with prior art, the laser that the present invention is sent by the first LASER Light Source and the second LASER Light Source is to the irradiation of wheel, first high speed camera and the second high speed camera carry out taking pictures and read the position that wheel is parallel to the two-end-point on the same diameter line of track, and detect the offset distance of this two-end-point relative to the first high speed camera of correspondence, the field of view center of the second high speed camera, add the spacing L of the field of view center direction along ng a path of the first high speed camera and the second high speed camera, thus the diameter of wheel can be obtained, measure precisely, error is little, simple and fast.And the present invention directly can measure wheel diameter, avoid the cumulative errors that indirect inspection brings.
Accompanying drawing explanation
The front view of the imaging modules that Fig. 1 uses for online tramway train wheel diameter method of measurement of the present invention and wheel.
Two kinds of schematic diagrams when Fig. 2 to Fig. 3 is different deviation position relative to viewing field of camera center of end points P1, P2.
Detailed description of the invention
In order to make technical scheme of the present invention more clearly show, below in conjunction with accompanying drawing, the invention will be further described.
Shown in composition graphs 1, one provided by the invention online tramway train wheel diameter method of measurement, the diameter for the wheel to process on track is measured, and comprises the following steps:
Step (1): obtain image, one group of imaging modules is provided, this imaging modules comprises the first high speed camera 21, second high speed camera 22, first LASER Light Source 31, second LASER Light Source 32 and alignment sensor 10, described imaging modules is installed on the inner side of track, described first LASER Light Source 31, first high speed camera 21, alignment sensor 10, second high speed camera 22, second LASER Light Source 32 is arranged in order from left to right, described first LASER Light Source 31 is arranged at the left side of the first high speed camera 21, for the first high speed camera 21 provides light source, make the first high speed camera 21 can photograph wheel more clearly, described second LASER Light Source 32 is arranged at the right side of the second high speed camera 22, and for the second high speed camera 22 provides light source, described alignment sensor 10 is arranged between the first high speed camera 21 and the second high speed camera 22 between two parties,
The distance of the relative position of the field of view center of described first high speed camera 21 and the field of view center direction along ng a path of the second high speed camera 22 is L; The visual field width of the first high speed camera 21 and the second high speed camera 22 is less than or equal to 140mm, and wheel diameter is between 540-620mm, by large diameter measurement is converted into undersized measurement, the first high speed camera 21 and the second high speed camera 22 is made to carry out high-precision measurement;
When the wheel of train is on the track that described imaging modules is corresponding, described alignment sensor 10 senses that the nadir of wheel is pressed in the position of the track of orientation sensing 10 correspondence, takes pictures in the side that described alignment sensor 10 triggers the first high speed camera 21 and the second high speed camera 22 pairs of wheels; Now, first high speed camera 21 and the second high speed camera 22 photographed the photo that wheel is parallel to the piece wheel wheel rim at two-end-point P1, P2 place of the diameter line of track respectively, particularly, the left photo A that first high speed camera 21 photographed is the left part edge of wheel, the right photograph B that second high speed camera 22 photographed is the right part edge of wheel, and described end points P1 be positioned at the first high speed camera 21 clap the leftmost side of left photo A, end points P2 be positioned at the second high speed camera 22 clap the rightmost side of right photograph B;
Step (2): detect offset distance, photographed photo is back in a central process unit and measures by described imaging modules; And the end points P1 of the leftmost side in detecting the left photo A that described first high speed camera 21 is clapped and the second high speed camera clap the location information of the end points P2 of the rightmost side in the 22 right photograph B clapped, and set the position of the first high speed camera 21 and the second high speed camera 22 field of view center respectively in left photo 30 and right photograph 40; Take track as X-axis coordinate line, the field of view center of central process unit to the field of view center of relatively corresponding the first high speed camera 21 of end points P1, the second high speed camera 22 that end points P2 is relatively corresponding is measured at the offset distance of X-direction;
Step (3): calculate wheel diameter, calculates the diameter D of wheel at the offset distance of X-direction according to the relatively corresponding field of view center of the first high speed camera 21 of end points P1, end points P2 in photo, the field of view center of the second high speed camera 22; The offset distance of the field of view center of the first high speed camera 21 that end points P1 is relatively corresponding is in the X-axis direction L1, and the offset distance of the field of view center of the second high speed camera 22 that end points P2 is relatively corresponding is in the X-axis direction L2, then D=L+L1+L2; If end points P1 is positioned at the left side of the first high speed camera 21 field of view center, then L1 is positive; If some P1 is positioned at the right side of the first high speed camera 21 field of view center, then L1 is negative value; If some P2 is positioned at the right side of the second high speed camera 22 field of view center, then L2 is positive, if some P2 is positioned at the left side of the second high speed camera 22 field of view center, then L2 is negative value; As shown in Figure 2, in described left photo A, end points P1 departs from field of view center to the right, then P1 is negative value to the offset distance L1 of field of view center point; In described right photograph B, end points P2 departs from field of view center left, then the offset distance L2 of the relative field of view center of P2 is negative value.As shown in Figure 3, in described left photo A, end points P1 departs from field of view center left, then P1 is positive to the offset distance L3 of field of view center point; In described right photograph B, end points P2 departs from field of view center to the right, then the offset distance L4 of the relative field of view center of P2 is positive.
In the present embodiment, the principle of work of described alignment sensor 10, after filling high-intensity magnetic field with by the magnet steel of inside, puts the coil of high strength enamelled wire coiling, cover aluminium cover again by epoxy packages; When train passes through through out-of-date, the wheel rim of wheel passes through from the magnetic head end face be stuck in inside track, cutting magnetic line, coil produces the induced electric motive force of a sinusoidal waveform, namely the line of centres of wheel and magnetic head becomes that moment of vertical line with track, this moment induced voltage changes, and the first high speed camera 21 and the second high speed camera 22 in this time trigger, thus photograph the left side edge of wheel and the photo of right side edge.
The laser that the present invention is sent by the first LASER Light Source 31 and the second LASER Light Source 32 is to the irradiation of wheel, first high speed camera 21 and the second high speed camera 22 carry out taking pictures and read the position that wheel is parallel to the two-end-point on the same diameter line of track, and detect the offset distance of this two-end-point relative to the field of view center of the first high speed camera 21, second high speed camera 22 of correspondence, add the spacing L of the field of view center direction along ng a path of the first high speed camera 21 and the second high speed camera 22, thus the diameter of wheel can be obtained, measure precisely, error is little, simple and fast.And the present invention directly can measure wheel diameter, avoid the cumulative errors that indirect inspection brings.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (3)
1. an online tramway train wheel diameter method of measurement, is characterized in that: this wheel diameter method of measurement comprises the steps:
Step (1): obtain image, one group of imaging modules is provided, this imaging modules comprises the first high speed camera, the second high speed camera, the first LASER Light Source, the second LASER Light Source and alignment sensor, described imaging modules is installed on the inner side of track, described first LASER Light Source, the first high speed camera, alignment sensor, the second high speed camera, the second LASER Light Source are arranged in order from left to right, and described alignment sensor is arranged between the first high speed camera and the second high speed camera between two parties; The distance of the relative position of the field of view center of described first high speed camera and the field of view center direction along ng a path of the second high speed camera is L;
When the wheel of train is through the top of imaging modules, described alignment sensor senses that the nadir of wheel is pressed in the position of track corresponding to orientation sensing, and described alignment sensor triggers the first high speed camera and take pictures in the side of the second high speed camera to wheel; Now the first high speed camera and the second high speed camera photographed the photo that wheel is parallel to the piece wheel wheel rim at end points P1, P2 place at the two ends of the diameter line of track respectively, and described end points P1 is positioned at the high order end that the first high speed camera is taken a picture, end points P2 is positioned at the right-hand member that the second high speed camera is taken a picture;
Step (2): detect offset distance, photographed photo is back in a central process unit and measures by described imaging modules; And the position of the end points P2 of the rightmost side at wheel edge in the photo clapped of end points P1 on the leftmost side at wheel edge in detecting the photo that described first high speed camera is taken and the second high speed camera, in photo, set the position of the first high speed camera and the second high speed camera field of view center respectively; Take track as X-axis coordinate line, the field of view center of the field of view center of the first high speed camera that the end points P1 of central process unit comparison film is relatively corresponding, the second high speed camera that end points P2 is relatively corresponding is measured at the offset distance of X-direction;
Step (3): calculate wheel diameter, calculates the diameter D of wheel at the offset distance of X-direction according to the relatively corresponding field of view center of the first high speed camera of end points P1, end points P2 in photo, the field of view center of the second high speed camera; The offset distance of the field of view center of the first high speed camera that end points P1 is relatively corresponding is in the X-axis direction L1, and the offset distance of the field of view center of the second high speed camera that end points P2 is relatively corresponding is in the X-axis direction L2, then D=L+L1+L2.
2. online tramway train wheel diameter method of measurement as claimed in claim 1, it is characterized in that: in described step (1), the visual field width of described first high speed camera and the second high speed camera is less than or equal to 140mm.
3. online tramway train wheel diameter method of measurement as claimed in claim 1, it is characterized in that: in described step (3), described end points P1 is positioned at the left side of the field of view center of the first high speed camera, then offset distance L1 is positive, otherwise then offset distance L1 is negative value on the right side of being positioned at; Described some P2 is positioned at the right side of the field of view center of the second high speed camera, then offset distance L2 is positive, otherwise on the left of being positioned at, then offset distance L2 is negative value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510657099.7A CN105292178B (en) | 2015-10-13 | 2015-10-13 | Online tramcar wheel diameter measuring method |
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| CN201510657099.7A CN105292178B (en) | 2015-10-13 | 2015-10-13 | Online tramcar wheel diameter measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415985A (en) * | 2017-03-24 | 2017-12-01 | 东莞市诺丽电子科技有限公司 | Train wheel diameter detection method |
| JP2020197473A (en) * | 2019-06-04 | 2020-12-10 | 株式会社ダイフク | Wheel diameter measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4749870A (en) * | 1985-06-26 | 1988-06-07 | Wilhelm Hegenscheidt Gesellschaft Mbh | Method and apparatus for measuring data for calculating the diameter of wheels, especially railroad wheel sets |
| CN101219672A (en) * | 2008-01-16 | 2008-07-16 | 北京交通大学 | Device and method for non-contact dynamic measurement of wheel diameter based on laser |
| CN102221331A (en) * | 2011-04-11 | 2011-10-19 | 浙江大学 | Measuring method based on asymmetric binocular stereovision technology |
| CN104520162A (en) * | 2012-08-28 | 2015-04-15 | 西门子公司 | Method and device for determining wheel diameter of vehicle, in particular of rail vehicle |
| CN104848795A (en) * | 2015-03-16 | 2015-08-19 | 东莞市诺丽电子科技有限公司 | On-line Wheel Diameter Measurement Method |
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2015
- 2015-10-13 CN CN201510657099.7A patent/CN105292178B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4749870A (en) * | 1985-06-26 | 1988-06-07 | Wilhelm Hegenscheidt Gesellschaft Mbh | Method and apparatus for measuring data for calculating the diameter of wheels, especially railroad wheel sets |
| CN101219672A (en) * | 2008-01-16 | 2008-07-16 | 北京交通大学 | Device and method for non-contact dynamic measurement of wheel diameter based on laser |
| CN102221331A (en) * | 2011-04-11 | 2011-10-19 | 浙江大学 | Measuring method based on asymmetric binocular stereovision technology |
| CN104520162A (en) * | 2012-08-28 | 2015-04-15 | 西门子公司 | Method and device for determining wheel diameter of vehicle, in particular of rail vehicle |
| CN104848795A (en) * | 2015-03-16 | 2015-08-19 | 东莞市诺丽电子科技有限公司 | On-line Wheel Diameter Measurement Method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415985A (en) * | 2017-03-24 | 2017-12-01 | 东莞市诺丽电子科技有限公司 | Train wheel diameter detection method |
| JP2020197473A (en) * | 2019-06-04 | 2020-12-10 | 株式会社ダイフク | Wheel diameter measuring device |
| JP7014204B2 (en) | 2019-06-04 | 2022-02-01 | 株式会社ダイフク | Wheel diameter measuring device |
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