CN111791916A - Online dynamic detection method and system for wheel tread temperature - Google Patents
Online dynamic detection method and system for wheel tread temperature Download PDFInfo
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- CN111791916A CN111791916A CN202010693116.3A CN202010693116A CN111791916A CN 111791916 A CN111791916 A CN 111791916A CN 202010693116 A CN202010693116 A CN 202010693116A CN 111791916 A CN111791916 A CN 111791916A
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 46
- 239000000523 sample Substances 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 24
- 230000001960 triggered effect Effects 0.000 claims description 8
- 238000013178 mathematical model Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 5
- 230000010259 detection of temperature stimulus Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/12—Measuring or surveying wheel-rims
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J2005/0033—Wheel
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
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Abstract
The invention discloses an online dynamic detection system for the tread temperature of a wheel, which comprises a temperature acquisition module and a host, wherein the temperature acquisition module comprises an infrared temperature measurement probe which is arranged beside a track and used for measuring the rim side surface temperature of the wheel in the process of travelling, and the host receives the actually measured rim side surface temperature obtained by the infrared temperature measurement probe and calculates to obtain the tread temperature of the wheel. The invention adopts a non-contact infrared temperature measurement mode, obtains the tread temperature of the wheel by indirectly calculating by measuring the side surface temperature of the rim of the wheel, is not influenced by the surface condition of the tread of the wheel, has high measurement accuracy, does not hinder the normal running of the railway vehicle, realizes on-line dynamic measurement, accurately grasps the temperature value of the tread when the railway vehicle works, provides a basis for further researching the influence of the temperature rise of the tread of the wheel on the tread state of the wheel, avoids train running accidents caused by overhigh temperature of the tread of the wheel, and ensures the running safety of the railway vehicle.
Description
Technical Field
The invention relates to the technical field of rail vehicle wheel tread temperature measurement, in particular to a wheel tread temperature online dynamic detection method and system.
Background
The wheel tread is the contact part of the wheel and the top surface of the steel rail, when the temperature of the wheel tread rises to a certain temperature, the wheel tread is likely to cause the acceleration of the abrasion of the wheel, the surface peeling or the crack, and the service life of the wheel is greatly influenced, so that the temperature of the wheel in the advancing process is monitored, and the wheel tread has a very positive effect on prolonging the service life of the wheel. The tread temperature measurement needs to be carried out in the running process of a train, the traditional temperature measurement mode adopts contact measurement, the heat conduction needs time, the instantaneous measurement requirement cannot be met, the real-time temperature of the tread of the wheel cannot be measured, the infrared temperature measurement in a non-contact mode is needed for the measurement of the tread temperature of the wheel, the infrared temperature measurement has certain limitations such as the material quality of a measured object, rough surface and the like, for metal materials, the surface roughness has great influence on the emissivity, the accuracy of the infrared temperature measurement is directly influenced, the rail vehicle runs for a long time, the surface of the tread of the wheel is very bright due to the braking, the friction with a steel rail and the like, and the infrared thermometer cannot directly and accurately measure the temperature.
Disclosure of Invention
The invention aims to solve the technical problems and provide a technical task for improving the prior art, and provides an online dynamic detection system for the tread temperature of a wheel, which solves the problems that the online dynamic measurement of the tread temperature of the wheel is difficult to carry out in the prior art and the measurement is accurate and low.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the online dynamic detection method for the tread temperature of the wheel comprises the steps of measuring the rim side surface temperature of a running wheel in real time by adopting an infrared temperature measuring probe, and calculating the tread temperature of the wheel through a temperature relation mathematical model of the rim side surface and the tread of the wheel. The online dynamic detection method of the wheel tread temperature adopts a non-contact infrared temperature measurement mode, the wheel tread temperature is obtained through indirect calculation by measuring the side surface temperature of the rim of the wheel, the surface of the side surface of the rim of the wheel is not bright, so that the side surface temperature of the rim can be accurately measured through the infrared temperature measurement mode, the material of the wheel is a stable and internally heat-source-free isotropic material, the heat generated by the wheel tread is diffused to the periphery of the wheel tread according to a fixed rule, a mathematical model of the temperature relation between the side surface of the rim and the wheel tread can be established through calculation, the wheel tread temperature can be obtained through calculation after the side surface temperature of the rim is obtained through actual measurement, the measurement accuracy is high, the normal operation of a railway vehicle is not hindered, the online dynamic measurement is realized, and the operation safety of.
Furthermore, a plurality of infrared temperature measuring probes are arranged beside the track and distributed at intervals along the track direction, and the length covered by the infrared temperature measuring probes along the track direction is more than or equal to the circumferential length of the wheel. The rim side surface temperature of different positions on the wheel circumferential direction can be measured through a plurality of infrared temperature measuring probes distributed at intervals, so that the wheel tread temperature of different positions on the wheel circumferential direction can be calculated, for example, the wheel tread temperature of different positions on the wheel circumferential direction can be caused to be different under the brake or other special conditions, the whole circumference of the wheel is covered by the infrared temperature measuring probes arranged at intervals, and the detection comprehensiveness is improved.
Further, the mathematical model of the temperature relationship between the side surface of the rim and the tread of the wheel is f (x)0＝a×e(b×x)+c×e(d×x)Wherein x is the measured rim side temperature, f (x)0The temperature of the wheel tread is obtained, a, b, c and d are coefficients obtained by solving simulation data, the material of the wheel is a stable isotropic material without a heat source inside, heat generated by the wheel tread is diffused to the periphery of the wheel tread according to a fixed rule, the heat is propagated in a uniform medium in a three-dimensional direction and can be calculated through a formula, the temperature relation between the side surface of the rim and the wheel tread can be obtained by deduction, a numerical solution of the obtained temperature can be obtained through simulation, and then a temperature change curve is obtained by performing curve fitting on the numerical solution.
The utility model provides an online dynamic detection system of wheel tread temperature, includes temperature acquisition module and host computer, the temperature acquisition module including set up the infrared temperature probe that is used for measuring the rim side temperature of the wheel of marcing beside the track, the host computer receives the actual measurement rim side temperature that infrared temperature probe obtained and calculates and obtain wheel tread temperature. According to the invention, the rim side surface temperature is accurately measured in an infrared temperature measurement mode, and then the wheel tread temperature is calculated through the rim side surface temperature obtained through actual measurement, so that the measurement accuracy is high, the normal operation of the railway vehicle is not influenced, the online dynamic measurement is realized, and the operation safety of the railway vehicle is ensured.
Further, the temperature acquisition module still includes the wheel sensor who is connected with the host computer and is triggered by the wheel through the setting beside the track, and wheel sensor and infrared temperature probe cooperation work ensure that the accurate measurement of infrared temperature probe ability obtains rim side temperature, utilize wheel sensor to count the wheel moreover, ensure that infrared temperature probe measures and obtain rim side temperature and wheel one-to-one.
Furthermore, the infrared temperature measurement probe continuously works to obtain a temperature measurement curve, the wheel sensor sends triggering time information to the host after being triggered by the wheel, the temperature corresponding to the triggering time on the temperature measurement curve is the actually measured rim side temperature, the infrared temperature measurement probe continuously works to measure the temperature, when the rail vehicle runs along a rail, the wheel can pass through the temperature measurement area of the infrared temperature measurement probe, the temperature measurement curve obtained by the infrared temperature measurement probe contains the temperature value measured by the wheel rim, the actually measured temperature of the rim side is further obtained from the temperature measurement curve in combination with the accurate time when the wheel triggered by the wheel sensor passes through, the system is high in measurement precision, the infrared temperature measurement probe does not need to be frequently opened and closed, and high-speed and accurate temperature measurement is ensured.
Furthermore, the temperature acquisition module is provided with a plurality of along the track direction interval, but the wheel rim side temperature of the different positions department on the measurable quantity wheel circumferencial direction to can calculate the wheel tread temperature of obtaining different positions department on the wheel circumferencial direction.
Furthermore, the length that a plurality of temperature acquisition modules covered along the track direction is more than or equal to the circumference length of wheel, adopts the whole circumference that a plurality of infrared temperature probe that the interval set up covered the wheel, improves and detects the comprehensiveness.
Furthermore, the temperature acquisition module contains a plurality of infrared temperature probe that measures the wheel rim side different position temperature, measures the wheel rim side different position and obtains a plurality of actual measurement rim side temperature, and the rethread is backward derived and is obtained the wheel tread temperature with track contact department, improves the degree of accuracy of the wheel tread temperature that the backstepping obtained.
Furthermore, the host computer still be connected with alarm module, report to the police when wheel tread temperature surpasss the default, avoid leading to rail vehicle to appear the operation accident because of wheel tread temperature is too high.
Compared with the prior art, the invention has the advantages that:
the online dynamic detection method and the online dynamic detection system for the tread temperature of the wheel adopt a non-contact infrared temperature measurement mode, the tread temperature of the wheel is obtained through indirect calculation by measuring the side surface temperature of the rim of the wheel, the online dynamic detection method and the system are not influenced by the surface condition of the tread of the wheel, the measurement accuracy is high, the normal running of the railway vehicle is not influenced, the online dynamic measurement is realized, the temperature value of the tread of the railway vehicle during working is accurately mastered, a basis is provided for further researching the influence of the temperature rise of the tread of the wheel on the tread state of the wheel, the running accident of the train caused by overhigh tread temperature of the wheel is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an online dynamic detection system for the tread temperature of a wheel;
FIG. 2 is a schematic view of an installation structure of a temperature acquisition module;
FIG. 3 is a schematic view of the arrangement structure of the temperature acquisition modules along the track direction;
FIG. 4 is a schematic diagram showing comparison between a temperature measurement curve obtained by an infrared temperature measurement probe and a triggering time sequence of a wheel sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The online dynamic detection system for the tread temperature of the wheel, disclosed by the embodiment of the invention, can dynamically measure the tread temperature of the wheel of the rail vehicle in real time, does not influence the normal running of the rail vehicle, has high measurement accuracy, and can give an alarm when the temperature is too high, so that the running accident of the rail vehicle caused by the overhigh tread temperature is avoided.
Because the material of the wheel is a steady-state isotropic material without an internal heat source, the heat generated by the wheel tread is diffused to the periphery of the wheel tread according to a fixed rule, and the propagation of the heat in a uniform medium in the three-dimensional direction can be expressed by the following equation:
where u is the temperature, which is a function of the time variable t and the spatial coordinates (x, y, z);
is the rate of change of temperature at a point in space over time; u. ofxx，uyyAnd uzzIs temperatureSecond derivatives of three spatial axes; k is the thermal diffusivity, which is determined by the thermal conductivity, density and heat capacity of the material. For a wheel, it can be considered that the wheel tread is a heating point, heat is uniformly spread from the wheel tread along a three-dimensional direction, the temperature of a certain point on the wheel has a regular relation with the temperature of the wheel tread, and therefore the actual temperature of the wheel tread can be reversely deduced by measuring the temperatures of other positions of the wheel.
The surface of the outer side surface of the wheel rim is rougher compared with the tread, the method is suitable for acquiring the temperature of the outer side of the wheel rim by an infrared temperature measurement method, and then the actual temperature of a heat source, namely the tread temperature of the wheel, is reversely deduced. In this embodiment, the online dynamic detection method of the wheel tread temperature is to measure the rim side surface temperature of the running wheel in real time by using an infrared temperature measuring probe, and then calculate the wheel tread temperature by using a mathematical model of the temperature relationship between the rim side surface and the wheel tread.
The numerical solution of the temperature can be obtained through simulation, and then curve fitting is carried out on the numerical solution to obtain a temperature change curve. The mathematical model of the temperature relationship between the side surface of the wheel rim and the tread is f (x)0＝a×e(b×x)+c×e(d×x)Wherein x is the measured rim side temperature, f (x)0And a, b, c and d are undetermined coefficients, specific values of a, b, c and d are obtained by solving through simulation data according to parameters such as thermal conductivity, density and heat capacity of the material, and the tread temperature of the wheel can be calculated after the side surface temperature of the rim is actually measured.
As shown in fig. 1 to 3, the system based on the online dynamic detection method for the tread temperature of the wheel mainly comprises a temperature acquisition module and a host, wherein the temperature acquisition module comprises an infrared temperature measurement probe 11 which is arranged beside a track and used for measuring the rim side temperature of the running wheel, and the host receives the measured rim side temperature obtained by the infrared temperature measurement probe 11 and calculates to obtain the tread temperature of the wheel.
And the temperature acquisition module also comprises a wheel sensor 12 which is connected with the host and is arranged beside the track and is triggered by passing wheels, the infrared temperature measurement probe 11 continuously works to obtain a temperature measurement curve, the wheel sensor 12 sends triggering time information to the host after being triggered by the wheels, and the temperature on the temperature measurement curve corresponding to the triggering time is the actually measured rim side surface temperature. As shown in fig. 4, the infrared temperature probe works uninterruptedly to obtain a temperature measurement curve, when the rail vehicle runs along the rail, the wheel passes through a temperature measurement area of the infrared temperature probe, so that the temperature measurement curve obtained by the infrared temperature probe changes, specifically, the temperature measurement curve is in a wave-shaped structure, a peak area is a time period when the wheel passes through the temperature measurement area of the infrared temperature probe, and because the speed of the rail vehicle is inconsistent, it is difficult to accurately position the wheel from the temperature measurement curve to an accurate rim side temperature, in this embodiment, a time node when the wheel passes through the infrared temperature probe is accurately obtained by using the wheel sensor, a trigger time sequence of the wheel sensor is compared with the temperature measurement curve obtained by the infrared temperature probe, a moment when the wheel sensor is triggered is a moment when the infrared temperature probe faces the rim side, and a temperature at the moment on the temperature measurement curve is a required actually measured, the measurement precision is effectively guaranteed, the infrared temperature measurement probe continuously works without being frequently opened and closed, and high-speed and accurate temperature measurement is guaranteed.
The temperature acquisition module contains the infrared temperature probe 11 of the different position temperature of a plurality of measurement wheel rim side, in this embodiment, is provided with 3 infrared temperature probe 11 in the temperature acquisition module, and the interval of adjacent infrared temperature probe 11 is 200mm, measures the different positions of wheel rim side and obtains a plurality of actual measurement rim side temperatures, and the rethread reverse derivation obtains the wheel tread temperature with track contact department, improves the degree of accuracy of the wheel tread temperature that the back-push obtained.
And, the temperature acquisition module is provided with a plurality of along the track direction interval, the interval of adjacent temperature acquisition module is less than the circumference length of wheel, and the length that a plurality of temperature acquisition module covered along the track direction is more than or equal to the circumference length of wheel, rim side temperature of different positions department on the wheel circumferencial direction can be measured through a plurality of infrared temperature probes of interval distribution, thereby can calculate the wheel tread temperature of obtaining different positions department on the wheel circumferencial direction, and can effectively cover the whole circumference of wheel, improve the comprehensive nature of wheel tread temperature detection, provide the basis for further studying the influence of wheel tread temperature rise to wheel tread state. The host computer still be connected with alarm module, report to the police when wheel tread temperature surpasss the default, avoid because of the too high running accident that leads to rail vehicle of wheel tread temperature, improve rail vehicle operation security.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The online dynamic detection method for the tread temperature of the wheel is characterized in that the rim side surface temperature of a running wheel is measured in real time by adopting an infrared temperature measuring probe, and the tread temperature of the wheel is calculated by a mathematical model of the temperature relationship between the rim side surface and the tread of the wheel.
2. The on-line dynamic detection method for the temperature of the tread of the wheel as claimed in claim 1, wherein a plurality of infrared temperature probes are arranged beside the track and distributed at intervals along the track direction, and the length covered by the plurality of infrared temperature probes along the track direction is greater than or equal to the circumferential length of the wheel.
3. The on-line dynamic detection method for the temperature of the wheel tread of claim 1, wherein the mathematical model of the temperature relationship between the rim side surface and the wheel tread is f (x)0＝a×e(b×x)+c×e(d×x)Wherein x is the measured rim side temperature, f (x)0For the wheel tread temperature, a, b, c, d are coefficients obtained by solving the simulation data.
4. The utility model provides an online dynamic detection system of wheel tread temperature, its characterized in that includes temperature acquisition module and host computer, the temperature acquisition module including set up in the track side be used for measuring rim side temperature's of the wheel of marcing infrared temperature probe (11), the host computer receives the actual measurement rim side temperature that infrared temperature probe (11) obtained and calculates and obtain wheel tread temperature.
5. The online dynamic detection system for wheel tread temperature according to claim 4, characterized in that the temperature acquisition module further comprises a wheel sensor (12) connected with the host computer and arranged beside the track and triggered by passing wheels.
6. The online dynamic detection system for the tread temperature of the wheel as claimed in claim 5, wherein the infrared temperature measurement probe (11) works continuously to obtain a temperature measurement curve, the wheel sensor (12) is triggered by the wheel and then sends triggering time information to the host, and the temperature on the temperature measurement curve corresponding to the triggering time is the measured rim side temperature.
7. The system for on-line dynamic detection of temperature of wheel tread according to any one of claims 4 to 6, wherein the temperature acquisition module is provided with a plurality of temperature acquisition modules at intervals along the rail direction.
8. The system for on-line dynamic detection of wheel tread temperature according to claim 7, wherein the length covered by the plurality of temperature acquisition modules along the track direction is greater than or equal to the circumferential length of the wheel.
9. The system for the on-line dynamic detection of the temperature of the tread of the wheel as claimed in any one of claims 4 to 6, wherein the temperature acquisition module comprises a plurality of infrared temperature measurement probes (11) for measuring the temperature of different positions on the side surface of the rim of the wheel.
10. The system for the on-line dynamic detection of the temperature of the tread of the wheel as claimed in any one of claims 4 to 6, wherein the host computer is further connected with an alarm module.
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| CN202010693116.3A CN111791916A (en) | 2020-07-17 | 2020-07-17 | Online dynamic detection method and system for wheel tread temperature |
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| CN202010693116.3A CN111791916A (en) | 2020-07-17 | 2020-07-17 | Online dynamic detection method and system for wheel tread temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022089880A1 (en) * | 2020-10-27 | 2022-05-05 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | System and method for monitoring the state of a wheel of a rail vehicle |
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| CN208568113U (en) * | 2018-07-27 | 2019-03-01 | 一汽解放汽车有限公司 | It is a kind of to measure the monitoring of formula break drum temperature and alarm device indirectly |
| CN109591783A (en) * | 2018-12-04 | 2019-04-09 | 清华大学 | Vehicle brake temperature control device |
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2020
- 2020-07-17 CN CN202010693116.3A patent/CN111791916A/en active Pending
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|---|---|---|---|---|
| US20130342341A1 (en) * | 2012-06-25 | 2013-12-26 | Gm Global Technology Operations Llc. | Tire monitoring system and method |
| CN105423934A (en) * | 2015-12-23 | 2016-03-23 | 东莞市诺丽电子科技有限公司 | Train wheel diameter detection method |
| CN106314414A (en) * | 2016-08-26 | 2017-01-11 | 蔡景洋 | Cargo carrying vehicle as well as vehicle brake system temperature monitoring system and vehicle brake system temperature monitoring method |
| CN207649913U (en) * | 2017-12-11 | 2018-07-24 | 中车青岛四方机车车辆股份有限公司 | A kind of brake shoe wheel temperature rise detecting device |
| CN208568113U (en) * | 2018-07-27 | 2019-03-01 | 一汽解放汽车有限公司 | It is a kind of to measure the monitoring of formula break drum temperature and alarm device indirectly |
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