CN104236720A - Operating train axle temperature imaging monitor - Google Patents
Operating train axle temperature imaging monitor Download PDFInfo
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- CN104236720A CN104236720A CN201410370030.1A CN201410370030A CN104236720A CN 104236720 A CN104236720 A CN 104236720A CN 201410370030 A CN201410370030 A CN 201410370030A CN 104236720 A CN104236720 A CN 104236720A
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- temperature
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- wheel shaft
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- array detector
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Abstract
The invention discloses an operating train axle temperature imaging monitor and belongs to the field of temperature monitoring of high-speed moving objects. The monitor solves the problems of the prior art that axle temperature and distribution of the axle temperature can not be judged accurately and diagnosis of an axle failure is difficult. The monitor comprises a main control circuit, a high-brightness LED lamp, a visible light linear array camera, a medium-wave infrared linear array detector, an infrared lens, a baffle, a temperature sensor and a motor, wherein the infrared lens is arranged in front of the medium-wave infrared linear array detector, the baffle provided with the temperature sensor is arranged between the infrared lens and an axle, the temperature sensor is arranged on the baffle, the main control circuit controls the baffle to move through the motor, the main control circuit irradiates the operating train axle by controlling the high-brightness LED lamp and collects axle position and temperature information by controlling the visible light linear array camera and the medium-wave infrared linear array detector, and the main control circuit transmits the collected axle position and temperature information to an external computer to be imaged through a Camera link interface.
Description
Technical field
The invention belongs to high-speed moving object temperature monitoring field, be specifically related to a kind of running train wheel shaft temperature imaging monitor.
Background technology
The speed of train operation is higher, and the speed of usual lorry is at about 70km/h, and passenger vehicle is usually at about 120km/h, and the speed of motor-car and high ferro can reach more than 300km/h.In traveling at a high speed, the bearing in the wheel of train can produce certain heat due to friction, and these heats that the measured bearing of matter produces are safe from harm.But due to the existence of manufacturing defect, easily there is various inefficacy at a high speed and under fully loaded transportation condition in bearing, produces hot box and even fire axle, the security of operation of harm train.
In the equipment of domestic existing monitoring train hot box, be all adopt single point temperature detector usually, gather through the out-of-date temperature to axletree at train.Owing to only employing a detector in gatherer process, be easily subject to the interference from environment, as the spark that brake produces, toppling over of hot water.These interference make monitoring equipment produce erroneous judgement, and result makes no problem train be blocked, and have impact on normal operation and the scheduling of train.
Abroad, the product of German SST company adopts the axle temperature of Multi-point detection train, effectively raises the correctness of monitoring.But what the program adopted is that the different lateral location of multiple point to axle are monitored, and can not carry out imaging to the Temperature Distribution of wheel shaft, can not react the profiling temperatures of wheel shaft intuitively, the diagnosis of Troubles in Wheel-sets exists certain difficulty.And in existing thermal infrared imager, as the Ying Fu Tyke thermal imaging system of Germany, frame frequency during shooting can reach 100Hz under full frame pattern, the axletree for the train of high-speed cruising cannot blur-free imaging.Therefore a kind of monitor that can carry out imaging to the temperature of running train wheel shaft is needed.
Summary of the invention
The object of the invention is to propose a kind of running train wheel shaft temperature imaging monitor, what solve prior art existence can not accurately judge wheel shaft temperature and distribution situation thereof, and the diagnosis of Troubles in Wheel-sets exists the problem of certain difficulty; Realize the imaging to running train wheel shaft Temperature Distribution, and intuitively reflect the profiling temperatures of wheel shaft.
For achieving the above object, running train wheel shaft temperature imaging monitor of the present invention comprises governor circuit, high-brightness LED lamp, luminous ray array camera, medium-wave infrared linear array detector, infrared lens, baffle plate, temperature sensor, motor, data acquisition array, temperature control circuit, the driving of constant current source driving array, temperature measurement circuit and motor;
Described medium-wave infrared linear array detector is furnished with infrared lens, baffle plate is provided with between described infrared lens and described running train wheel shaft, described baffle plate is provided with temperature sensor, governor circuit drives drive motor to control baffle plate action by motor, and gathers the temperature of baffle plate by temperature sensor;
Described governor circuit obtains the data of medium-wave infrared linear array detector collection by data acquisition array, governor circuit controls the temperature of medium-wave infrared linear array detector by temperature control circuit, described medium-wave infrared linear array detector drives array to drive by constant current source, and governor circuit obtains the temperature of baffle plate by temperature measurement circuit;
Described governor circuit irradiates running train wheel shaft by controlling high-brightness LED lamp, by controlling luminous ray array camera and medium-wave infrared linear array detector collection wheel shaft position and temperature information, the wheel shaft positional information of collection and temperature information are passed to outer computer by Camera link interface and are carried out imaging by governor circuit.
Described medium-wave infrared linear array detector is spliced by multiple single-point infrared eye.
Described multiple single-point infrared eye at least 20, each single-point infrared eye has independently driving and signal data acquisition array.
Described each single-point infrared eye is provided with independently temperature control circuit, and described temperature control circuit adopts three level semiconductor refrigerators.
The uniform blackwash of described baffle plate oiling.
Described luminous ray array camera is parallel with the visual field of medium-wave infrared linear array detector not to be overlapped.
Beneficial effect of the present invention is: running train wheel shaft temperature imaging monitor of the present invention adopts the medium-wave infrared linear array detector be spliced into by single-point infrared eye to carry out the collection of temperature data, and each single-point infrared eye uses independently driving circuit and data acquisition circuit, the bandwidth of system is greatly improved, temperature imaging can be carried out to swiftly passing object; Use the less infrared eye of pixel number and the more visible-light detector of pixel number to take the image obtained to do and merge, improve image quality and the sharpness of temperature pattern, intuitively reflect the profiling temperatures of wheel shaft, accurately can judge the wheel shaft temperature of running train, effectively Troubles in Wheel-sets be diagnosed.
Accompanying drawing explanation
Fig. 1 is running train wheel shaft temperature imaging monitor system block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
See accompanying drawing 1, a kind of running train wheel shaft temperature imaging monitor of the present invention comprise governor circuit, high-brightness LED lamp, luminous ray array camera, medium-wave infrared linear array detector, infrared lens, baffle plate, temperature sensor and, motor, data acquisition array, temperature control circuit, constant current source drive array, temperature measurement circuit and motor drive;
Described medium-wave infrared linear array detector front is provided with infrared lens, and the design of infrared lens can make the image position of wheel shaft in the image planes of infrared eye; Baffle plate is provided with between described infrared lens and described running train wheel shaft, described baffle plate is provided with temperature sensor, governor circuit is by the action of Electric Machine Control baffle plate, and the temperature of baffle plate is gathered by temperature sensor, described governor circuit and luminous ray array camera adopt Camera link interface to be connected, and governor circuit is by the action of Camera link Interface Controller Visible Light Camera;
Described governor circuit obtains the data of medium-wave infrared linear array detector collection by data acquisition array, governor circuit controls the temperature of medium-wave infrared linear array detector by temperature control circuit, described medium-wave infrared linear array detector drives array to drive by constant current source, governor circuit obtains the temperature of baffle plate by temperature measurement circuit, and governor circuit is by controlling drive and control of electric machine motor action;
Described governor circuit irradiates running train wheel shaft by controlling high-brightness LED lamp, by controlling luminous ray array camera and medium-wave infrared linear array detector collection wheel shaft position and temperature information, the wheel shaft positional information of collection and temperature information are passed to outer computer by Camera link interface and are carried out imaging by governor circuit.
Described medium-wave infrared linear array detector is spliced by multiple single-point infrared eye.
Described multiple single-point infrared eye at least 20, each single-point infrared eye has independently driving and signal data acquisition array.Governor circuit controls all data acquisition arrays, according to the signal of each single-point infrared eye of line frequency Real-time Collection.
Described each single-point infrared eye is provided with independently temperature control circuit, and described temperature control circuit adopts three level semiconductor refrigerators.
The uniform blackwash of described baffle plate oiling, use black is the radiant emissivity in order to improve baffle plate.
Described luminous ray array camera is parallel with the visual field of medium-wave infrared linear array detector not to be overlapped.
The workflow of running train wheel shaft temperature imaging monitor of the present invention is: before train enters the visual field of monitor, first heterogeneity rectification is carried out to MID INFRARED array detector, after train enters visual field, governor circuit control high-brightness LED is opened and is carried out visible ray light filling, control motor rotated down baffle plate, luminous ray array camera and infrared part synchronous acquisition view data.Infrared data and visible data are packed and send to outer computer by Camera Link interface by governor circuit.What the temperature of medium wave linear array infrared eye controlled to adopt is 3 level semiconductor refrigerators, and each pixel detecting device uses independently constant current source to drive, and uses independently signal acquisition circuit.20 pixels adopt 20 road electric currents to drive and signals collecting.
Governor circuit realizes baffle plate action by drive and control of electric machine motor, and when equipment does not take image, correct baffle plate and block infrared lens, infrared part carries out heterogeneity rectification and temperature compensation, when taking image, correcting baffle plate and withdrawing from field range.
The data that infrared part collects are corresponding with the temperature of vehicle, and corresponding relation adopts the curve demarcated, and use baffle plate do heterogeneity correct and temperature sensor do temperature data compensate; The acquisition pattern of described curve is: the data that infrared part collects are directly corresponding with temperature, and the relation of data and temperature demarcates out by standard blackbody.Timing signal, standard surface source blackbody temperature T is progressively warmed up to 150 ° from room temperature, the data Y that collect of every 5 ° of records infrared part, is then horizontal ordinate by data Y, take T as ordinate, use least square fitting to go out curve.
Infrared part uses 20 pixels, and visible ray uses 512 pixels, is superimposed, and is transferred to the host computer of equipment by Camera Link interface, i.e. outer computer after image pixel coupling.
The visual field of visible ray is parallel with infrared visual field not to be overlapped, and makes the image pixel accurate match after fusion by arranging infrared and line displacement amount that is visible ray in software.
Embodiment one:
Be that the axletree of the train of 300km/h is imaging shooting to speed, the diameter 400mm of axletree, if require that the resolution of image is 20mm, valid pixel is 20, the frame frequency so taken is not less than 208Hz, if adopt scan method scanning shoot frequency to be not less than 4167Hz.
The present invention adopts the method that the infrared image of the visible images of high frame rate and high frame rate splices to carry out imaging to train axle.Here visible images carries out image acquisition by linear array detector, and its pixel resolution is more than 512, and line frequency sweep rate is at more than 30Khz, and the axletree of corresponding 300km/h speed, effective pixel reaches 144.And the medium-wave infrared detector that infrared image is made up of 20 pixels collects.Infrared eye adopts the photoconductive detector of mercury cadmium telluride, and its bandwidth is enough high, and the response time is at Microsecond grade.
Luminous ray array camera selects industrial linear array scanning camera, and line frequency is at more than 30Khz, and pixel is more than 512.As selected the Spyder2 camera of DALSA company, resolution is 512, and line frequency is 65KHz.Its control interface uses 26 core Camera Link interfaces; Governor circuit uses DS90CR288A and DS90CR287A to carry out serioparallel exchange to data; DS90LV047ATMTC and DS90LV048ATMTC is used to change differential signal and single-ended signal;
The rotation of baffle plate is by driven by motor, and motor is controlled by master control, and motor drives and uses existing motor driver, and governor circuit sends position command to motor driver and makes motor action.As selected stepper motor, then select a stepper motor driver, governor circuit sends pulse and direction signal to stepper motor driver, as selected direct current generator, then selects a DC motor driver, has master control to send position command by serial ports to driver;
The temperature of baffle plate is monitored by temperature detecting resistance, can use platinum resistor temperature measuring, mixes MAX31865 and carries out temperature survey; Also can use thermistor to measure, mix electric bridge and digital to analog converter.
Claims (6)
1. running train wheel shaft temperature imaging monitor, it is characterized in that, comprise governor circuit, high-brightness LED lamp, luminous ray array camera, medium-wave infrared linear array detector, infrared lens, baffle plate, temperature sensor, motor, data acquisition array, temperature control circuit, the driving of constant current source driving array, temperature measurement circuit and motor;
Described medium-wave infrared linear array detector is furnished with infrared lens, baffle plate is provided with between described infrared lens and described running train wheel shaft, described baffle plate is provided with temperature sensor, governor circuit drives drive motor to control baffle plate action by motor, and gathers the temperature of baffle plate by temperature sensor;
Described governor circuit obtains the data of medium-wave infrared linear array detector collection by data acquisition array, governor circuit controls the temperature of medium-wave infrared linear array detector by temperature control circuit, described medium-wave infrared linear array detector drives array to drive by constant current source, and governor circuit obtains the temperature of baffle plate by temperature measurement circuit;
Described governor circuit irradiates running train wheel shaft by controlling high-brightness LED lamp, by controlling luminous ray array camera and medium-wave infrared linear array detector collection wheel shaft position and temperature information, the wheel shaft positional information of collection and temperature information are passed to outer computer by Camera link interface and are carried out imaging by governor circuit.
2. running train wheel shaft temperature imaging monitor according to claim 1, it is characterized in that, described medium-wave infrared linear array detector is spliced by multiple single-point infrared eye.
3. running train wheel shaft temperature imaging monitor according to claim 2, is characterized in that, each single-point infrared eye has independently driving and signal data acquisition array.
4. running train wheel shaft temperature imaging monitor according to claim 3, is characterized in that, described each single-point infrared eye is provided with independently temperature control circuit, and described temperature control circuit adopts three level semiconductor refrigerators.
5. running train wheel shaft temperature imaging monitor according to claim 1, is characterized in that, the uniform blackwash of described baffle plate oiling.
6. running train wheel shaft temperature imaging monitor according to claim 1, is characterized in that, described luminous ray array camera is parallel with the visual field of medium-wave infrared linear array detector not to be overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370030.1A CN104236720A (en) | 2014-07-30 | 2014-07-30 | Operating train axle temperature imaging monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370030.1A CN104236720A (en) | 2014-07-30 | 2014-07-30 | Operating train axle temperature imaging monitor |
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| CN104236720A true CN104236720A (en) | 2014-12-24 |
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| CN201410370030.1A Pending CN104236720A (en) | 2014-07-30 | 2014-07-30 | Operating train axle temperature imaging monitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560737A (en) * | 2017-09-28 | 2018-01-09 | 清华大学 | A kind of vehicle axles multiple point temperature measurement device and method based on infrared multispectral |
| CN107782453A (en) * | 2017-09-28 | 2018-03-09 | 清华大学 | Vehicle axles multiple point temperature measurement device and method based on visible ray and infrared multispectral |
| CN107907223A (en) * | 2017-11-14 | 2018-04-13 | 电子科技大学 | A kind of image processing method for removing sunlight and disturbing train wheel thermography |
| CN109341861A (en) * | 2018-08-31 | 2019-02-15 | 南京理工大学 | A kind of municipal rail train axle box temperature monitoring device and method |
| CN112284546A (en) * | 2020-10-16 | 2021-01-29 | 中国航发四川燃气涡轮研究院 | Tail nozzle temperature field visualization device based on binocular vision and identification method thereof |
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| CN2576558Y (en) * | 2002-11-11 | 2003-10-01 | 广汉科峰电子有限责任公司 | Protection device of infrared shaft-temp. detector |
| JP2005283298A (en) * | 2004-03-29 | 2005-10-13 | Central Japan Railway Co | Temperature detection device for object of temperature measurement and temperature detection device for underfloor equipment of vehicle |
| CN101716945A (en) * | 2010-01-14 | 2010-06-02 | 广州科易光电技术有限公司 | Railway locomotive axle infrared thermal image monitoring method and system |
| CN101762327A (en) * | 2010-01-14 | 2010-06-30 | 广州科易光电技术有限公司 | Infrared temperature monitoring method and system of electrified railway contact network |
| CN203332149U (en) * | 2013-07-15 | 2013-12-11 | 成都欧莱特自动化控制工程有限公司 | Running-train train bogie and chassis imaging and temperature measurement device |
| CN103507831A (en) * | 2012-06-15 | 2014-01-15 | 北京工业大学 | Digital multipoint infrared detecting device of railway axle temperature monitoring system |
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Patent Citations (6)
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| CN2576558Y (en) * | 2002-11-11 | 2003-10-01 | 广汉科峰电子有限责任公司 | Protection device of infrared shaft-temp. detector |
| JP2005283298A (en) * | 2004-03-29 | 2005-10-13 | Central Japan Railway Co | Temperature detection device for object of temperature measurement and temperature detection device for underfloor equipment of vehicle |
| CN101716945A (en) * | 2010-01-14 | 2010-06-02 | 广州科易光电技术有限公司 | Railway locomotive axle infrared thermal image monitoring method and system |
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| CN203332149U (en) * | 2013-07-15 | 2013-12-11 | 成都欧莱特自动化控制工程有限公司 | Running-train train bogie and chassis imaging and temperature measurement device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560737A (en) * | 2017-09-28 | 2018-01-09 | 清华大学 | A kind of vehicle axles multiple point temperature measurement device and method based on infrared multispectral |
| CN107782453A (en) * | 2017-09-28 | 2018-03-09 | 清华大学 | Vehicle axles multiple point temperature measurement device and method based on visible ray and infrared multispectral |
| CN107907223A (en) * | 2017-11-14 | 2018-04-13 | 电子科技大学 | A kind of image processing method for removing sunlight and disturbing train wheel thermography |
| CN107907223B (en) * | 2017-11-14 | 2019-08-02 | 电子科技大学 | A kind of image processing method that removal sunlight interferes train wheel thermography |
| CN109341861A (en) * | 2018-08-31 | 2019-02-15 | 南京理工大学 | A kind of municipal rail train axle box temperature monitoring device and method |
| CN112284546A (en) * | 2020-10-16 | 2021-01-29 | 中国航发四川燃气涡轮研究院 | Tail nozzle temperature field visualization device based on binocular vision and identification method thereof |
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Application publication date: 20141224 |