CN103661485A - Laser detection device for measuring diameter of wheel of railway vehicle - Google Patents
Laser detection device for measuring diameter of wheel of railway vehicle Download PDFInfo
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- CN103661485A CN103661485A CN201310720069.7A CN201310720069A CN103661485A CN 103661485 A CN103661485 A CN 103661485A CN 201310720069 A CN201310720069 A CN 201310720069A CN 103661485 A CN103661485 A CN 103661485A
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Abstract
The invention discloses a laser detection device for measuring the diameter of a wheel of a railway vehicle. The laser detection device for measuring the diameter of the wheel of the railway vehicle comprises a laser transmitter, a CCD camera, a laser distance measuring sensor and a central processing control system. A detection window is cut in a main rail on which a locomotive travels; the laser transmitter and the CCD camera are installed below the detection window of the main rail, the laser distance measuring sensor is installed at the position, exactly facing the rim of the wheel, of the inner side of the main rail, the laser transmitter irradiates the tread of the wheel to form a light section shape curve representing the overall dimensions, the CCD camera obtains the light section shape curve, and transmits data to the central processing control system, the laser distance measuring sensor obtains data of the distance of the rim of the wheel through measurement, and sends the data to the central processing control system, and the central processing control system carries out calculation to obtain the diameter of the wheel. According to the laser detection device for measuring the diameter of the wheel of the railway vehicle, the laser distance measuring sensor is used for carrying out auxiliary measurement, the position of the rolling circle of the tread of the wheel is accurately located, the accurate measurement of the diameter of the wheel is achieved, the structure is simple, applicability is good, and traveling safety of trains is ensured.
Description
Technical field
The present invention relates to a kind of detecting device of locomotive car wheel, relate in particular to a kind of laser detector of measuring locomotive car wheel diameter.
Background technology
Wheel is the critical component of motor supply shop's walking system, and wheel is the parts that contact with rail on rolling stock, and the effect of wheel is guarantee the operation of rolling stock on rail and turn to, and wheel profile critical size is directly connected to traffic safety.The great development of railway speed increase and the high density of rolling stock are moved, and have accelerated the rate of wear of wheel.Therefore for avoiding occurring that wheel that oad transfinites, also in the situation that continues place in operation, guarantees the safety of train driving, need to carry out detection of dynamic to wheel profile size.
Laser image measurement technology has been widely used in exact measurement at present, laser measurement is a kind of non-contact measurement, do not affect the motion of testee, precision is high, measurement range is large, detection time is short, there is very high spatial resolution, a large amount of check implements arise at the historic moment, the apomecometer based on a laser for example, and the light based on line laser cuts method measuring equipment etc.
Utilize pick up camera in measurement mechanism to take the outside drawing picture of the middle wheel of advancing, from image, directly obtain the profilograph of reflection wheel of vehicle profile and carry out the measurement of relevant wheel profile dimensional parameters and appearance curve.What at present the method for measurement of wheel diameter is adopted is three spot diameter mensurations: wherein first, second point adopts the laser of laser transmitting and the intersection point of wheel tread, thirdly adopt the intersection point of wheel tread and rail, and in practice, when train from existing measurement mechanism through out-of-date, deformation will occur rail and wheel can swing, this is thirdly difficult to orient accurately, therefore, precision and the accuracy of the wheel diameter obtaining based on three point measurement modes cannot be guaranteed, and the real effectiveness of data is poor.
Summary of the invention
The technical assignment of technical matters to be solved by this invention and proposition is that prior art is improved, a kind of laser detector of measuring locomotive car wheel diameter is provided, solve in current technology when train is advanced, deformation can occur rail and wheel can swing, the intersection point of wheel tread and rail is difficult to accurately location, thereby causes survey precision and the poor problem of accuracy of wheel diameter.
For solving above technical matters, technical scheme of the present invention is:
A kind of laser detector of measuring locomotive car wheel diameter, comprise laser transimitter, ccd video camera, laser range sensor and central process control system, it is characterized in that, on the backbone passing through at locomotive driving, cut out detection window, laser transimitter and ccd video camera device are below the detection window of backbone, laser range sensor device in backbone inner side over against wheel rim place, when the wheel of vehicle passes through detection window, laser transimitter sends along the light belt of wheel narrower in width radially and is radiated on wheel tread and forms and represent that the light of oad cuts appearance curve, by ccd video camera, obtaining light cuts appearance curve and gives central process control system by image data transmission, the distance that laser range sensor records wheel rim sends data to central process control system, by central process control system, calculate wheel diameter.The light belt that laser transimitter sends be radiated at Train Dynamic by time wheel on, utilize light to cut the circular curve that method obtains wheel tread, by ccd video camera, obtained again the graphicinformation of circular curve, in original technology, adopt three point measurement methods to measure wheel diameter, on the wheel tread circular curve that the method applied in the present invention obtains, there is N the point relevant to diameter, greatly improved the precision that wheel diameter is measured, and circular curve has certain length, the integral status of measuring wheel that can be more clear and intuitive, understand wheel and whether have the situations such as local dent projection.And the range information S1 of wheel rim inner distance sensor when also obtaining Train Dynamic and pass through by laser range sensor when measuring, the circular arc line that requires surveyed tread rolling circle place during due to actual measurement is 70mm apart from the distance of wheel rim inner side, and S1+70mm is mixed moving circle place circular arc line apart from the distance of laser range sensor.And the wheel rim of wheel is in unsettled state all the time, can not be worn, so its size can guarantee long-term stability, and then whether the wearing and tearing of judging wheel transfinite, avoid occurring that wheel that oad transfinites, also in the situation that continues place in operation, guarantees the safety of train driving.
Further, described laser transimitter is by two laser heads axially forming side by side perpendicular to backbone.Two laser heads form two circular curves on the tread of wheel, the precision of improve measuring, and the tread of wheel itself is constant slope simultaneously, utilizes the degree of wear that two circular curves can clearer grasp wheel.
Further, the guard rail that the described restricted wheel of the other returning apparatus of backbone significantly swings, guard rail guarantees that wheel travels according to very little left and right side-play amount, guarantees that wheel can not derail, and improves the precision of measuring.
Further, described laser transimitter, ccd video camera and laser range sensor device have two parallel covers, measure two wheels simultaneously, improve and measure efficiency.
Further, outside the track bed district, backbone both sides in described detection window the place ahead, in the altitude range of compartment envelope, be provided with sentencing of being connected with central process control system to and counting shaft with axle counter sensor, and returning apparatus has wheel detector on backbone, wheel detector is connected with central process control system.Sentence to and counting shaft with axle counter sensor can judge rolling stock travel direction, and can realize vehicle count according to pulse number, provide the signal of vehicle arrival to central process control system simultaneously, central authorities' process control system is controlled laser transimitter, the parts such as ccd video camera and laser range sensor start in readiness for action, when vehicle continues to move ahead, when wheel passes through wheel detector, wheel detector sends wheel arriving signal and wheel velocity signal to central process control system, central authorities' process control system calculates time-lapse shooting constantly, control laser transimitter, ccd video camera and laser range sensor are accurately constantly recording surveying work, realize round-the-clock automatic detection, automatic data logging, do not need manual intervention.
Further, described laser detector returning apparatus has the system equipments such as cover plate protection laser range sensor and central process control system, and the safety in utilization of protection equipment, avoids the corrosion of rainwater dust storm, improves the service life of equipment.
Compared with prior art, the invention has the advantages that:
The laser detector of measurement locomotive car wheel diameter of the present invention utilizes laser transimitter to irradiate on the wheel tread of train under steam and forms and represent that the light of wheel circular arc curvature cuts appearance curve, then by ccd video camera, light being cut to appearance curve shooting obtains, and adopt laser range sensor subsidiary, locate accurately the position of wheel tread tread rolling circle, realized the accurate measurement of wheel diameter;
The present invention at the other device of the backbone of track guard rail, guarantee that wheel travels according to very little left and right side-play amount, guarantee to improve when wheel can not derail the precision of measuring;
The laser detector of measurement locomotive car wheel diameter of the present invention is little to the speed restriction of train, allow train Negotiation speed to reach 30km/h, realize detection of dynamic, and utilize to and counting shaft with axle counter sensor and wheel detector carry out full automatic control, can realize round-the-clock automatic detection, automatic data logging, do not need artificial intervention completely, use manpower and material resources sparingly, reduce use cost;
The laser detector of measurement locomotive car wheel diameter of the present invention is simple in structure, low cost of manufacture, and applicability is strong, simple to operate, and economic benefit is high, ensures the safety of train driving.
Accompanying drawing explanation
Fig. 1 is principle of work schematic diagram of the present invention;
Fig. 2 is track local structure schematic diagram of the present invention;
Fig. 3 is integral structure schematic diagram of the present invention.
The specific embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention discloses a kind of laser detector of measuring locomotive car wheel diameter, original two point measurement methods are extended to the diameter measuring method that N is ordered, adopt laser range sensor subsidiary simultaneously, the position of positioning car wheel tread tread rolling circle, realizes the accurate measurement of wheel diameter accurately.
As depicted in figs. 1 and 2, a kind of laser detector of measuring locomotive car wheel diameter, comprise laser transimitter 1, ccd video camera 2, laser range sensor 3 and central process control system 4, on the backbone 5 that locomotive driving passes through, cut out detection window 6, laser transimitter 1 and ccd video camera 2 devices are below the detection window 6 of backbone 5, laser range sensor 3 installs in backbone 5 inner sides over against wheel rim place, the other returning apparatus of backbone 5 has the guard rail 7 near wheel rim inner side, limiting wheel significantly swings, and prevents wheel hanging, oversteps the limit.Laser transimitter 1 is by two laser heads axially forming side by side perpendicular to backbone 5, when the wheel of vehicle passes through detection window 6, laser transimitter 1 sends two light belts along wheel narrower in width radially and is radiated on wheel tread to form and represents that the light of oad cuts appearance curve, by ccd video camera 2, obtaining light cuts appearance curve and gives central process control system 4 by image data transmission, the distance that laser range sensor 3 records wheel rim sends data to central process control system 4, by central process control system 4, calculates wheel diameter.
By 2 laser heads side by side and ccd video camera 2 obtain Train Dynamic by time wheel tread circular curve, by laser range sensor 3, obtain the range information S1 of the wheel rim inner distance distance measuring sensor of the dynamic process of car simultaneously, during due to actual measurement, the circular arc line at the tread rolling circle place that requirement is surveyed is 70mm apart from the distance of wheel rim inner side, therefore, S1+70mm is the circular arc line at tread rolling circle place apart from the distance of laser range sensor 3, can utilize simple triangle relation to calculate the diameter information of wheel.
As shown in Figure 3, laser transimitter 1, ccd video camera 2 and laser range sensor 3 devices have two parallel covers, measure two wheels simultaneously.Laser detector returning apparatus has the system equipments such as cover plate 10 protection laser range sensors 3 and central process control system 4.
As shown in Figure 3, outside the backbone 5 track bed districts, both sides in detection window 6 the place aheads, in the altitude range of compartment envelope, be provided with sentencing of being connected with central process control system 4 to and counting shaft with axle counter sensor 8, and returning apparatus has wheel detector 9 on backbone 5, wheel detector 9 is connected with central process control system 4.Sentence to and counting shaft with axle counter sensor 8 adopt before after two pairs of correlation photoelectric switchs of installation, when having locomotive vehicle passing detection region, disconnected two the correlation photoelectric switchs of first backstop, central authorities' process control system obtains one group of impulse singla with sequential, can judge rolling stock service direction accordingly; According to pulse number, can realize vehicle count, the wheel that can realize every joint compartment in conjunction with the impulse singla of wheel detector is meter shaft to the counting of axle simultaneously.When wheel passes through wheel detector, wheel detector sends wheel arriving signal and wheel velocity signal to central process control system, central authorities' process control system calculates time-lapse shooting constantly, control laser transimitter, ccd video camera and laser range sensor and accurately constantly recording surveying work, realize round-the-clock automatic detection, automatic data logging, does not need manual intervention.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a laser detector of measuring locomotive car wheel diameter, comprise laser transimitter (1), ccd video camera (2), laser range sensor (3) and central process control system (4), it is characterized in that, on the backbone passing through at locomotive driving (5), cut out detection window (6), laser transimitter (1) and ccd video camera (2) device are in detection window (6) below of backbone (5), laser range sensor (3) installs in backbone (5) inner side over against wheel rim place, when the wheel of vehicle passes through detection window (6), laser transimitter (1) sends along the light belt of wheel narrower in width radially and is radiated on wheel tread and forms and represent that the light of oad cuts appearance curve, by ccd video camera (2), obtaining light cuts appearance curve and gives central process control system (4) by image data transmission, the distance that laser range sensor (3) records wheel rim sends data to central process control system (4), by central process control system (4), calculate wheel diameter.
2. the laser detector of measurement locomotive car wheel diameter according to claim 1, is characterized in that, described laser transimitter (1) is by two laser heads axially forming side by side perpendicular to backbone (5).
3. the laser detector of measurement locomotive car wheel diameter according to claim 1, is characterized in that, the guard rail (7) that the restricted wheel of the other returning apparatus of described backbone (5) significantly swings.
4. the laser detector of measurement locomotive car wheel diameter according to claim 3, it is characterized in that, described laser transimitter (1), ccd video camera (2) and laser range sensor (3) device have two parallel covers, measure two wheels simultaneously.
5. the laser detector of measurement locomotive car wheel diameter according to claim 4, it is characterized in that, outside the track bed district, backbone (5) both sides in described detection window (6) the place ahead, in the altitude range of compartment envelope, be provided with sentencing of being connected with central process control system (4) to and counting shaft with axle counter sensor (8), and at the upper returning apparatus of backbone (5), have wheel detector (9), wheel detector (9) is connected with central process control system (4).
6. the laser detector of measurement locomotive car wheel diameter according to claim 5; it is characterized in that, described laser detector returning apparatus has the system equipments such as cover plate (10) protection laser range sensor (3) and central process control system (4).
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| CN201310720069.7A CN103661485A (en) | 2013-12-23 | 2013-12-23 | Laser detection device for measuring diameter of wheel of railway vehicle |
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| CN201310720069.7A CN103661485A (en) | 2013-12-23 | 2013-12-23 | Laser detection device for measuring diameter of wheel of railway vehicle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527723A (en) * | 2014-12-18 | 2015-04-22 | 西南交通大学 | Detection system and integrated detection device thereof |
| CN104764405A (en) * | 2014-12-18 | 2015-07-08 | 成都铁安科技有限责任公司 | System for detecting the installation height of key part of train |
| CN106114553A (en) * | 2016-06-28 | 2016-11-16 | 中国人民解放军国防科学技术大学 | The photoelectricity dynamic measurement method that a kind of railway detection car platform rocks |
| CN106828538A (en) * | 2016-12-15 | 2017-06-13 | 浙江大学 | Using the highly reliable multi-functional wheel counting apparatus system and method for laser-correlation instrument |
| CN110030936A (en) * | 2019-03-28 | 2019-07-19 | 唐山百川智能机器股份有限公司 | Non-contact type locomotive wheel diameter measuring device |
| CN110729669A (en) * | 2019-08-27 | 2020-01-24 | 东莞理工学院 | Cable axial cutting system and method based on phase type laser ranging |
| CN111089547A (en) * | 2020-01-20 | 2020-05-01 | 成都主导科技有限责任公司 | Train wheel set overall dimension measuring system, measuring device and measuring method |
| CN112429033A (en) * | 2019-08-25 | 2021-03-02 | 赵若群 | Online measuring device and method for wheel cake parameters of railway vehicle |
| CN115432032A (en) * | 2022-09-30 | 2022-12-06 | 哈尔滨市科佳通用机电股份有限公司 | Subway rail geometric form and position parameter dynamic detection method based on light interception method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4798964A (en) * | 1985-08-12 | 1989-01-17 | Wilhelm Hegenscheidt Gesellschaft Mbh | Method and apparatus for the contactless measuring of the tread quality of railroad |
| CN1149126A (en) * | 1995-06-29 | 1997-05-07 | 塔尔格，S·A· | Installation and process for measuring rolling parameters by means of artificial vision on wheels of railway |
| US5936737A (en) * | 1996-02-07 | 1999-08-10 | Simmons Machine Tool Corporation | Wheelset sensing system |
| FR2805038A1 (en) * | 2000-02-14 | 2001-08-17 | Mitsubishi Electric Corp | Optical photographic unit for measuring the dimensions of railway wheels using two laser light sources and two cameras |
| US20040095585A1 (en) * | 2002-11-18 | 2004-05-20 | Kambiz Nayebi | Wheel profile inspection apparatus and method |
| CN2910707Y (en) * | 2006-06-23 | 2007-06-13 | 西南交通大学 | On-line dynamic testing equipment for shape and size of rolling stock wheel set |
| CN100999220A (en) * | 2006-12-18 | 2007-07-18 | 杭州电子科技大学 | On-line detection method and device for vehicle wheel set diameter |
| CN101219672A (en) * | 2008-01-16 | 2008-07-16 | 北京交通大学 | Non-contact type dynamic measuring device and method for wheel diameter based on laser and method thereof |
| ES2325389A1 (en) * | 2006-11-07 | 2009-09-02 | Dano Rail, S. Coop | Geometry meter of the railway rolling. (Machine-translation by Google Translate, not legally binding) |
| JP2010181216A (en) * | 2009-02-04 | 2010-08-19 | Hankyu Corp | Apparatus for measuring shape of wheel |
| CN203739913U (en) * | 2013-12-23 | 2014-07-30 | 成都铁安科技有限责任公司 | Laser detection device measuring diameter of wheel of rail vehicle |
-
2013
- 2013-12-23 CN CN201310720069.7A patent/CN103661485A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4798964A (en) * | 1985-08-12 | 1989-01-17 | Wilhelm Hegenscheidt Gesellschaft Mbh | Method and apparatus for the contactless measuring of the tread quality of railroad |
| CN1149126A (en) * | 1995-06-29 | 1997-05-07 | 塔尔格，S·A· | Installation and process for measuring rolling parameters by means of artificial vision on wheels of railway |
| US5936737A (en) * | 1996-02-07 | 1999-08-10 | Simmons Machine Tool Corporation | Wheelset sensing system |
| FR2805038A1 (en) * | 2000-02-14 | 2001-08-17 | Mitsubishi Electric Corp | Optical photographic unit for measuring the dimensions of railway wheels using two laser light sources and two cameras |
| US20040095585A1 (en) * | 2002-11-18 | 2004-05-20 | Kambiz Nayebi | Wheel profile inspection apparatus and method |
| CN2910707Y (en) * | 2006-06-23 | 2007-06-13 | 西南交通大学 | On-line dynamic testing equipment for shape and size of rolling stock wheel set |
| ES2325389A1 (en) * | 2006-11-07 | 2009-09-02 | Dano Rail, S. Coop | Geometry meter of the railway rolling. (Machine-translation by Google Translate, not legally binding) |
| CN100999220A (en) * | 2006-12-18 | 2007-07-18 | 杭州电子科技大学 | On-line detection method and device for vehicle wheel set diameter |
| CN101219672A (en) * | 2008-01-16 | 2008-07-16 | 北京交通大学 | Non-contact type dynamic measuring device and method for wheel diameter based on laser and method thereof |
| JP2010181216A (en) * | 2009-02-04 | 2010-08-19 | Hankyu Corp | Apparatus for measuring shape of wheel |
| CN203739913U (en) * | 2013-12-23 | 2014-07-30 | 成都铁安科技有限责任公司 | Laser detection device measuring diameter of wheel of rail vehicle |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104527723A (en) * | 2014-12-18 | 2015-04-22 | 西南交通大学 | Detection system and integrated detection device thereof |
| CN104764405A (en) * | 2014-12-18 | 2015-07-08 | 成都铁安科技有限责任公司 | System for detecting the installation height of key part of train |
| CN106114553A (en) * | 2016-06-28 | 2016-11-16 | 中国人民解放军国防科学技术大学 | The photoelectricity dynamic measurement method that a kind of railway detection car platform rocks |
| CN106828538A (en) * | 2016-12-15 | 2017-06-13 | 浙江大学 | Using the highly reliable multi-functional wheel counting apparatus system and method for laser-correlation instrument |
| CN110030936A (en) * | 2019-03-28 | 2019-07-19 | 唐山百川智能机器股份有限公司 | Non-contact type locomotive wheel diameter measuring device |
| CN112429033A (en) * | 2019-08-25 | 2021-03-02 | 赵若群 | Online measuring device and method for wheel cake parameters of railway vehicle |
| CN112429033B (en) * | 2019-08-25 | 2023-09-29 | 北京镭格之光测量技术有限公司 | Online measuring device and method for wheel cake parameters of railway vehicle |
| CN110729669A (en) * | 2019-08-27 | 2020-01-24 | 东莞理工学院 | Cable axial cutting system and method based on phase type laser ranging |
| CN111089547A (en) * | 2020-01-20 | 2020-05-01 | 成都主导科技有限责任公司 | Train wheel set overall dimension measuring system, measuring device and measuring method |
| CN115432032A (en) * | 2022-09-30 | 2022-12-06 | 哈尔滨市科佳通用机电股份有限公司 | Subway rail geometric form and position parameter dynamic detection method based on light interception method |
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