CN110001709B - Following type subway train axle box temperature detection system and method - Google Patents

Following type subway train axle box temperature detection system and method Download PDF

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Publication number
CN110001709B
CN110001709B CN201910351562.3A CN201910351562A CN110001709B CN 110001709 B CN110001709 B CN 110001709B CN 201910351562 A CN201910351562 A CN 201910351562A CN 110001709 B CN110001709 B CN 110001709B
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China
Prior art keywords
intersection
intersection point
magnetic steel
train
speed
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CN201910351562.3A
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CN110001709A (en
Inventor
孟琳山
王丰东
王勇
王明海
王子晗
张兴田
丁辉
吴金麟
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Shanghai Rail Transit Maintenance Support Co ltd
CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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Shanghai Rail Transit Maintenance Support Co ltd
CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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Priority to CN201910351562.3A priority Critical patent/CN110001709B/en
Publication of CN110001709A publication Critical patent/CN110001709A/en
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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
    • B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
    • B61K9/06—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault by detecting or indicating heat radiation from overheated axles
    • 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
    • G01J5/02—Constructional details
    • G01J5/0205—Mechanical elements; Supports for optical elements
    • 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
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • G01J5/047—Mobile mounting; Scanning arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a temperature detection system and a temperature detection method for an axle box of a following type subway train, which are characterized in that a main controller, a speed measuring device and a follow-up imaging device which are sequentially arranged along the running direction of a train are arranged to detect the temperature of the axle box, and the temperature detection system for the axle box of the following type subway train is arranged on a train running line.

Description

Following type subway train axle box temperature detection system and method
Technical Field
The invention belongs to the technical field of rail vehicles, and particularly relates to a temperature detection system and method for an axle box of a following subway train.
Background
In operation, when the interior of the axle box is abnormal, friction force resistance between wheels and the axle box is increased, the temperature of the axle box is increased, and potential safety hazards can be brought to train operation if the temperature of the axle box is not treated in time. The method is to paste temperature test paper on the axle box of the train to show different temperatures, when the temperature of the test point is higher than the temperature of the point, the color of the square or the round point becomes irreversible black or other colors, and the highest temperature experienced by the object can be judged according to the color of the square.
The temperature test paper method needs to paste the temperature test paper on the axle box manually, after the train runs each time, the color of the test paper is observed by the human body one by one.
In view of the foregoing, it is desirable to provide a trailing subway train axlebox temperature detection system and method that is capable of automatically detecting the axlebox temperature of a running train.
Disclosure of Invention
The invention provides a following subway train axle box temperature detection system and method capable of automatically detecting the axle box temperature of a running train aiming at the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the following type subway train axle box temperature detection system is used for detecting the axle box temperature of a bogie and comprises a main controller, a speed measuring device and a follow-up imaging device, wherein the speed measuring device and the follow-up imaging device are sequentially arranged along the running direction of a train and are used for detecting the running speed of the train, and the main controller is respectively and electrically connected with the speed measuring device and the follow-up imaging device;
the four follow-up imaging devices are arranged on two sides of the double-track in pairs and are symmetrically arranged along the double-track, wherein the distance between the two follow-up imaging devices arranged on the same side along the direction of the double-track is equal to the distance between two wheel axles of the bogie, and the intersection points of the four follow-up imaging devices making vertical lines to the double-track are respectively an intersection point A, an intersection point B, an intersection point C and an intersection point D; the follow-up imaging device comprises an infrared camera and a driving piece for driving the infrared camera to rotate along the vertical direction;
the main controller comprises a logic operation module and an execution module, and the logic operation module and the execution module are electrically connected; the logic operation module is used for receiving the speed information sent by the speed measuring device, calculating the running speed of the train, the time when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D and the angular speed when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D, wherein the driving piece drives the infrared camera to rotate, and sending the calculation result to the execution module;
the execution module is used for controlling the angular speed of the driving piece to drive the infrared camera to rotate according to the calculation result, and controlling the four infrared cameras to shoot the axle boxes positioned on the same bogie respectively according to the time when the axle boxes positioned on the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D.
Preferably, the follow-up imaging device further comprises a rotating shaft and a mounting seat assembly which are arranged vertically to the ground, and the rotating shaft is rotationally connected with the mounting seat assembly; the driving piece drives the infrared camera to rotate through the rotating shaft; the outer side of the rotating shaft is sleeved with an electric conduction slip ring, the electric conduction slip ring comprises a rotor and a stator, the rotor is rotationally connected with the stator, the rotor is fixedly connected with the rotating shaft, and the stator is fixedly connected with the mounting seat assembly; the rotor is electrically connected with the infrared camera, and the stator is electrically connected with the main controller.
Preferably, the speed measuring device comprises a first magnetic steel, a second magnetic steel and a magnetic steel mounting seat, wherein the first magnetic steel and the second magnetic steel are electrically connected with the main controller, the first magnetic steel and the second magnetic steel are mounted on the magnetic steel mounting seat, and the magnetic steel mounting seat is mounted on one of the double-track tracks and is on the same side as a wheel rim advancing on the track; the first magnetic steel and the second magnetic steel are sequentially arranged along the advancing direction of the train.
Preferably, the following subway train axle box temperature detection system further comprises a counter, wherein the counter is electrically connected with the second magnetic steel of the speed measuring device and the logic operation module of the main controller;
the counter is used for counting the triggering times of the second magnetic steel;
the logic operation module is used for calculating the running speed of the train, the time of the axle boxes of the same bogie reaching the intersection A, the intersection B, the intersection C and the intersection D and the angular speed of the driving piece driving the infrared camera to rotate when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D according to the speed information when the numerical value output by the counter is even, and sending the calculation result to the execution module.
Preferably, the driving member is a servo motor.
The following subway train axle box temperature detection method adopts the following subway train axle box temperature detection system, and the method comprises the following steps:
step S1: the speed measuring device detects the speed information of the train and sends the speed information to the logic operation module of the main controller;
step S2: the logic operation module receives the speed information sent by the speed measuring device, calculates the running speed of the train, the time of the axle boxes of the same bogie reaching the intersection A, the intersection B, the intersection C and the intersection D and the angular speed of the driving piece driving the infrared camera to rotate when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D according to the speed information, and sends a calculation result to the execution module;
step S3: and the execution module controls the angular speed of the driving piece to drive the infrared camera to rotate according to the calculation result, and controls the four infrared cameras to shoot the axle boxes positioned on the same bogie respectively according to the time when the axle boxes positioned on the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D.
Preferably, the specific process of the step S2 is as follows:
step S21: the counter counts the triggering times of the second magnetic steel;
step S22: and when the numerical value output by the counter is even, the logic operation module calculates the running speed of the train, the time for the axle boxes of the same bogie to reach the intersection point A, the intersection point B, the intersection point C and the intersection point D, and the angular speed for the driving piece to drive the infrared camera to rotate when the axle boxes of the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D, and sends a calculation result to the execution module.
Preferably, the step S22 is a step of driving the vehicle at a speed V Row of lines The specific calculation method of (a) is as follows:
V row of lines ＝L/t；
In the above formula, L is the distance between the first magnetic steel and the second magnetic steel; t is the time interval that the wheel rim of the train passes over the first magnetic steel and the second magnetic steel.
Preferably, in the step S22, a time t is set at which the axle boxes located in the same bogie reach the intersection a, the intersection B, the intersection C, and the intersection D from the velocimeter 1 The specific calculation method of (a) is as follows:
t 1 ＝L 1 /V row of lines ＝L 1 ·t/L；
In the above, L 1 The distance between the intersection point B and the intersection point C along the double-track direction and the second magnetic steel of the speed measuring device is smaller than the distance between the intersection point A and the intersection point D along the double-track direction and the second magnetic steel;
in the step S22, when the axle boxes located in the same bogie reach the intersection point a, the intersection point B, the intersection point C and the intersection point D, the angular speed ω at which the driving element drives the infrared camera to rotate should be:
ω＝L/(t·L 0 )；
in the above, L 0 The distance from the four follow-up imaging devices to the intersection point A, the intersection point B, the intersection point C and the intersection point D is set.
Preferably, the adjusting process of the angular velocity in the step S3 is as follows:
the servo motor drives the infrared camera to rotate at a certain angular acceleration a (t), and the infrared camera rotates at an elapsed time t 1 The back angular velocity is omega, and the rotation of N- (theta/2 pi) circles is just completed; wherein the angular acceleration a (t) satisfies the following formula:
t 0 ＝t 1 -2π·(N-(θ/2π)-n)/ω；
in the above, ω 0 And theta is the angular velocity of the infrared camera and the included angle between the lens of the infrared camera and the perpendicular line of the double-track when the axle boxes positioned on the same bogie pass through the speed measuring device, namely when the numerical value output by the counter is even; n is an integer, where N < N- (θ/2π).
The invention has the advantages and positive effects that:
1. according to the following type subway train axle box temperature detection system and method, the main controller, the speed measuring device and the follow-up imaging device which are sequentially arranged along the running direction of the train and used for detecting the running speed of the train are arranged to detect the temperature of the axle box, and the following type subway train axle box temperature detection system is arranged on a train running line and can automatically detect the temperature of the train axle box when the train passes through, so that manpower is liberated, and the working efficiency is improved;
2. according to the temperature detection system and method for the axle box of the following subway train, infrared shooting is carried out when the detected axle box of the train and the infrared camera are relatively static, so that the smear phenomenon of an infrared thermal image can be effectively avoided, and the reaction result is more accurate;
3. according to the following type subway train axle box temperature detection system and method, the four follow-up imaging devices are arranged, so that the axle box temperature on the same bogie can be detected at the same time, and the working efficiency is improved.
4. The following subway train axle box temperature detection system can detect the whole section temperature condition of the detected axle box, and has a large measurement range.
Drawings
FIG. 1 is a schematic diagram of a temperature detection system of an axle box of a following subway train;
FIG. 2 is a schematic diagram of a follow-up imaging device according to the present invention
FIG. 3 is a schematic diagram of a speed measuring device according to the present invention;
FIG. 4 is a schematic diagram of the installation of the speed measuring device according to the present invention;
FIG. 5 is a second schematic diagram of the installation of the speed measuring device of the present invention;
fig. 6 is a schematic diagram of a part of a temperature detection system of a following subway train axle box according to the invention.
In the figure: 1. a main controller; 11. a logic operation module; 12. an execution module; 2. a follow-up imaging device; 21. an infrared camera; 22. a rotating shaft; 23. a driving member; 24. a mounting base assembly; 241. a base; 242. a rotating shaft bracket; 243. a conductive slip ring positioning frame; 25. a conductive slip ring; 26. a first flange bearing; 27. a second flange bearing; 3. a speed measuring device; 31. a first magnetic steel; 32. a second magnetic steel; 33. a magnetic steel mounting seat; 331. a magnetic steel mounting plate; 332. a magnetic steel bracket; 333. a briquetting assembly; 3331. a first briquette; 3332. a second briquetting; 3333. an insulating plate; 4. a double track rail; 5. a train; 51. a wheel rim; 52. axle box 6, counter.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "inner", "outer", "upper", "lower", "front", "rear", etc. are based on the positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the temperature detection system of the axle box of the following subway train is used for detecting the temperature of the axle box 52 of the bogie, and comprises a main controller 1, a speed measuring device 3 and a follow-up imaging device 2, wherein the speed measuring device 3 and the follow-up imaging device 2 are sequentially arranged along the travelling direction of the train 5 and are used for detecting the travelling speed of the train 5, and the main controller 1 is respectively and electrically connected with the speed measuring device 3 and the follow-up imaging device 2;
the four follow-up imaging devices 2 are arranged on two sides of the double-track 4 in pairs and are symmetrically arranged along the double-track 4, wherein the distance between the two follow-up imaging devices 2 arranged on the same side along the direction of the double-track 4 is equal to the distance between two wheel axles of the bogie, and the intersection points of the perpendicular lines drawn by the four follow-up imaging devices 2 to the double-track 4 are respectively an intersection point A, an intersection point B, an intersection point C and an intersection point D; the follow-up imaging device 2 comprises an infrared camera 21 and a driving piece 23 for driving the infrared camera 21 to rotate along the vertical direction; preferably, the driving member 23 is a servo motor.
As shown in fig. 6, the main controller 1 includes a logic operation module 11 and an execution module 12, and the logic operation module 11 and the execution module 12 are electrically connected; the logic operation module 11 is configured to receive the speed information sent by the speed measuring device 3, calculate, according to the speed information, a traveling speed of the train 5, a time when the axle boxes 52 located on the same bogie reach the intersection a, the intersection B, the intersection C, and the intersection D, and an angular speed at which the driving element 23 drives the infrared camera 21 to rotate when reaching the intersection a, the intersection B, the intersection C, and the intersection D, and send a calculation result to the execution module 12;
the execution module 12 is configured to control, according to a calculation result, an angular speed at which the driving element 23 drives the infrared camera 21 to rotate, and control four infrared cameras 21 to respectively shoot the axle boxes 52 located on the same bogie according to a time when the axle boxes 52 located on the same bogie reach the intersection point a, the intersection point B, the intersection point C and the intersection point D.
As shown in fig. 2, the follow-up imaging device 2 further includes a rotating shaft 22 and a mounting seat assembly 24, which are disposed perpendicular to the ground, and the rotating shaft 22 is rotatably connected with the mounting seat assembly 24; the driving piece 23 drives the infrared camera 21 to rotate through the rotating shaft 22; the outer side of the rotating shaft 22 is sleeved with a conductive slip ring 25, the conductive slip ring 25 comprises a rotor and a stator, the rotor is rotationally connected with the stator, the rotor is fixedly connected with the rotating shaft 22, and the stator is fixedly connected with the mounting seat assembly 24; wherein, the rotor is electrically connected with the infrared camera 21, and the stator is electrically connected with the execution unit of the main controller 1.
Further, the mounting base assembly 24 includes a base 241, a rotating shaft support 242, and a conductive slip ring positioning frame 243, wherein the base 241, the rotating shaft support 242, and the conductive slip ring positioning frame 243 are sequentially connected, through holes are formed in the base 241, the rotating shaft support 242, and the conductive slip ring positioning frame 243, and the rotating shaft 22 is rotatably connected with the through holes in the base 241, the rotating shaft support 242, and the conductive slip ring positioning frame 243; the driving piece 23 is mounted on the base 241, and the stator is fixedly connected with the conductive slip ring positioning frame 243; preferably, the following imaging device 2 is further provided with a first flange bearing 26 and a second flange bearing 27, the first flange bearing 26 is installed between the through hole of the base 241 and the rotating shaft 22, and the second flange bearing 27 is installed between the through hole of the rotating shaft bracket 242 and the rotating shaft 22, so as to avoid rigid contact between the rotating shaft 22 and the mounting seat assembly 24; the base 241 is also provided with a motor bracket, and the servo motor is installed on the base 241 through the motor bracket.
As shown in fig. 3 to 5, the speed measuring device 3 includes a first magnetic steel 31, a second magnetic steel 32 and a magnetic steel mounting seat 33, the first magnetic steel 31 and the second magnetic steel 32 are electrically connected with the main controller 1, the first magnetic steel 31 and the second magnetic steel 32 are mounted on the magnetic steel mounting seat 33, and the magnetic steel mounting seat 33 is mounted on one of the two rails 4 and is on the same side as a wheel rim 51 running on the rail; wherein the first magnetic steel 31 and the second magnetic steel 32 are sequentially arranged along the travelling direction of the train 5; preferably, the magnetic steel mounting seat 33 includes a magnetic steel mounting plate 331, a magnetic steel bracket 332 and a pressing block assembly 333, the pressing block assembly 333 includes a first pressing block 3331 and a second pressing block 3332, and the first pressing block 3331 is fixedly connected with the second pressing block 3332; the magnetic steel mounting plate 331 is mounted on the magnetic steel support 332, the magnetic steel support 332 is fixed on the double-rail track 4 through the first pressing block 3331 and the second pressing block 3332, the first pressing block 3331 and the second pressing block 3332 are fixedly connected with the bottom of the double-rail track 4, and an insulating plate 3333 is arranged between the first pressing block 3331 and the second pressing block 3332 and the double-rail track 4.
With continued reference to fig. 6, the temperature detection system of the axle box of the following subway train further includes a counter 6, where the counter 6 is electrically connected with the second magnetic steel 32 of the speed measuring device 3 and the logic operation module 11 of the main controller 1;
the counter 6 is configured to count the number of triggering times of the second magnetic steel 32;
the logic operation module 11 is configured to calculate, based on the speed information, the traveling speed of the train 5, the time when the axle boxes 52 located on the same bogie reach the intersection a, the intersection B, the intersection C, and the intersection D, and the angular speed when the axle boxes reach the intersection a, the intersection B, the intersection C, and the intersection D when the numerical value output by the counter 6 is even, and send the calculation result to the execution module 12.
The following subway train 5 axle box 52 temperature detection method adopts the following subway train axle box temperature detection system, and the method comprises the following steps:
step S1: the speed measuring device 3 detects the speed information of the train 5 and sends the speed information to the logic operation module 11 of the main controller 1;
step S2: the logic operation module 11 receives the speed information sent by the speed measuring device 3, calculates the travelling speed of the train 5, the time when the axle boxes 52 positioned on the same bogie reach the intersection points A, B, C and D, and the angular speed when the axle boxes reach the intersection points A, B, C and D, wherein the driving piece 23 drives the infrared camera 21 to rotate, and sends the calculation result to the execution module 12;
step S3: the execution module 12 controls the angular speed of the driving member 23 to drive the infrared camera 21 to rotate according to the calculation result, and controls the four infrared cameras 21 to respectively shoot the axle boxes 52 positioned on the same bogie according to the time when the axle boxes 52 positioned on the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D.
Further, the specific process of step S2 is as follows:
step S21: the counter 6 counts the triggering times of the second magnetic steel 32;
step S22: the logic operation module 11 calculates the traveling speed of the train 5, the time when the axle boxes 52 of the same bogie reach the intersection a, the intersection B, the intersection C and the intersection D, and the angular speed when the axle boxes reach the intersection a, the intersection B, the intersection C and the intersection D, according to the speed information when the value output by the counter 6 is even, the driving element 23 drives the infrared camera 21 to rotate, and sends the calculation result to the execution module 12.
Further, the traveling speed V of the train 5 in the step S22 Row of lines The specific calculation method of (a) is as follows:
V row of lines ＝L/t；
In the above formula, L is the distance between the first magnetic steel 31 and the second magnetic steel 32; t is the time interval when the wheel rim 51 of the wheel of the train 5 passes over the first magnetic steel 31 and the second magnetic steel 32.
Further, in the step S22, the time t from the axle boxes 52 located in the same bogie to the intersection a, the intersection B, the intersection C, and the intersection D of the velocimeter 3 1 Is provided with (1)The volume calculation method comprises the following steps:
t 1 ＝L 1 /V row of lines ＝L 1 ·t/L；
In the above, L 1 The distance between the intersection point B and the intersection point C along the direction of the double-track 4 and the second magnetic steel 32 of the speed measuring device 3 is smaller than the distance between the intersection point A and the intersection point D along the direction of the double-track 4 and the second magnetic steel 32;
when the axle boxes 52 located in the same bogie reach the intersection a, the intersection B, the intersection C and the intersection D in the step S22, the angular speed ω at which the driving member 23 drives the infrared camera 21 to rotate should be:
ω＝L/(t·L 0 )；
in the above, L 0 The distances from the four follow-up imaging devices 2 to the intersection point A, the intersection point B, the intersection point C and the intersection point D are set.
Further, the adjusting process of the angular velocity in the step S3 is as follows:
the servo motor drives the infrared camera 21 to rotate at a certain angular acceleration a (t), and the time t is elapsed 1 The back angular velocity is omega, and the rotation of N- (theta/2 pi) circles is just completed; wherein the angular acceleration a (t) satisfies the following formula:
t 0 ＝t 1 -2π·(N-(θ/2π)-n)/ω；
in the above, ω 0 And θ is the angular velocity of the infrared camera 21 and the angle between the lens of the infrared camera 21 and the perpendicular of the double track 4 when the axle boxes 52 located on the same bogie pass through the speed measuring device 3, i.e. when the number output by the counter 6 is even; n is an integer, where N < N- (θ/2π).
The specific detection process is as follows:
when the train 5 passes through the speed measuring device 3, and when the second wheel rims 51 positioned on the two wheel axles of the same bogie trigger the first magnetic steel 31 and the second magnetic steel 32 in turn in the travelling process, the main controller 1 obtains the travelling speed of the train 5, the time when the axle box 52 positioned on the same bogie reaches the intersection point A, the intersection point B, the intersection point C and the intersection point D from the speed measuring device 3 and the angular speed when the driving piece 23 drives the infrared camera 21 to rotate when reaching the intersection point A, the intersection point B, the intersection point C and the intersection point D according to the distance between the first magnetic steel 31 and the second magnetic steel 32 and the triggering time interval;
after the train 5 passes through the speed measuring device 3, the main controller 1 controls the servo motors of the four follow-up imaging devices 2 to drive the infrared cameras 21 to rotate according to the calculation result, so that when the axle boxes 52 positioned on the same bogie reach the intersection points A, B, C and D, the lenses of the infrared cameras 21 just face the intersection points A, B, C and D, the linear speeds of the focal lengths of the four infrared cameras 21 at the intersection points A, B, C and D are the same as the travelling speed of the train 5, namely, the two are relatively static, at the moment, the main controller 1 controls the four follow-up imaging devices 2 to shoot the axle boxes 52 positioned on the same bogie, the infrared cameras 21 can shoot infrared thermal image patterns of the axle boxes 52, the thermal image patterns correspond to the thermal distribution fields on the surfaces of the axle boxes 52, different colors on the thermal image patterns can represent different temperatures of the detected axle boxes 52, and the darker colors represent that the temperature of the region is higher.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; it will be appreciated by those skilled in the art that changes may be made to the embodiments described above, or equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The temperature detection method is characterized in that a temperature detection system of the axle box of the following type subway train is adopted to detect the temperature of the axle box of the bogie, and comprises a main controller, a speed measuring device and a follow-up imaging device, wherein the speed measuring device and the follow-up imaging device are sequentially arranged along the running direction of the train and are used for detecting the running speed of the train, and the main controller is respectively and electrically connected with the speed measuring device and the follow-up imaging device;
the four follow-up imaging devices are arranged on two sides of the double-track in pairs and are symmetrically arranged along the double-track, wherein the distance between the two follow-up imaging devices arranged on the same side along the direction of the double-track is equal to the distance between two wheel axles of the bogie, and the intersection points of the four follow-up imaging devices making vertical lines to the double-track are respectively an intersection point A, an intersection point B, an intersection point C and an intersection point D; the follow-up imaging device comprises an infrared camera and a driving piece for driving the infrared camera to rotate along the vertical direction;
the main controller comprises a logic operation module and an execution module, and the logic operation module and the execution module are electrically connected; the logic operation module is used for receiving the speed information sent by the speed measuring device, calculating the running speed of the train, the time when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D and the angular speed when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D, wherein the driving piece drives the infrared camera to rotate, and sending the calculation result to the execution module;
the execution module is used for controlling the angular speed of the driving piece to drive the infrared cameras to rotate according to a calculation result, and controlling four infrared cameras to shoot the axle boxes positioned on the same bogie respectively according to the time when the axle boxes positioned on the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D;
the following subway train axle box temperature detection method comprises the following steps:
step S1: the speed measuring device detects the speed information of the train and sends the speed information to the logic operation module of the main controller;
step S2: the logic operation module receives the speed information sent by the speed measuring device, calculates the running speed of the train, the time of the axle boxes of the same bogie reaching the intersection A, the intersection B, the intersection C and the intersection D and the angular speed of the driving piece driving the infrared camera to rotate when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D according to the speed information, and sends a calculation result to the execution module;
step S3: and the execution module controls the angular speed of the driving piece to drive the infrared camera to rotate according to the calculation result, and controls the four infrared cameras to shoot the axle boxes positioned on the same bogie respectively according to the time when the axle boxes positioned on the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D.
2. The following subway train axle box temperature detection method according to claim 1, wherein: the follow-up imaging device further comprises a rotating shaft and a mounting seat assembly which are arranged perpendicular to the ground, and the rotating shaft is rotationally connected with the mounting seat assembly; the driving piece drives the infrared camera to rotate through the rotating shaft; the outer side of the rotating shaft is sleeved with an electric conduction slip ring, the electric conduction slip ring comprises a rotor and a stator, the rotor is rotationally connected with the stator, the rotor is fixedly connected with the rotating shaft, and the stator is fixedly connected with the mounting seat assembly; the rotor is electrically connected with the infrared camera, and the stator is electrically connected with the main controller.
3. The following subway train axle box temperature detection method according to claim 1, wherein: the speed measuring device comprises first magnetic steel, second magnetic steel and a magnetic steel mounting seat, wherein the first magnetic steel and the second magnetic steel are electrically connected with the main controller, the first magnetic steel and the second magnetic steel are mounted on the magnetic steel mounting seat, and the magnetic steel mounting seat is mounted on one of the double-track tracks and is on the same side as a wheel rim advancing on the track; the first magnetic steel and the second magnetic steel are sequentially arranged along the advancing direction of the train.
4. The following subway train axle box temperature detection method according to claim 3, wherein: the following subway train axle box temperature detection system further comprises a counter, wherein the counter is electrically connected with the second magnetic steel of the speed measuring device and the logic operation module of the main controller;
the counter is used for counting the triggering times of the second magnetic steel;
the logic operation module is used for calculating the running speed of the train, the time of the axle boxes of the same bogie reaching the intersection A, the intersection B, the intersection C and the intersection D and the angular speed of the driving piece driving the infrared camera to rotate when the axle boxes of the same bogie reach the intersection A, the intersection B, the intersection C and the intersection D according to the speed information when the numerical value output by the counter is even, and sending the calculation result to the execution module.
5. The following subway train axle box temperature detection method according to claim 1, wherein: the driving piece is a servo motor.
6. The following subway train axle box temperature detection method according to claim 4, wherein:
the specific process of the step S2 is as follows:
step S21: the counter counts the triggering times of the second magnetic steel;
step S22: and when the numerical value output by the counter is even, the logic operation module calculates the running speed of the train, the time for the axle boxes of the same bogie to reach the intersection point A, the intersection point B, the intersection point C and the intersection point D, and the angular speed for the driving piece to drive the infrared camera to rotate when the axle boxes of the same bogie reach the intersection point A, the intersection point B, the intersection point C and the intersection point D, and sends a calculation result to the execution module.
7. The following subway train axle box temperature detection method according to claim 6, wherein: the train running speed in the step S22The specific calculation method of (a) is as follows:
；
in the above formula, L is the distance between the first magnetic steel and the second magnetic steel; t is the time interval that the wheel rim of the train passes over the first magnetic steel and the second magnetic steel.
8. The following subway train axle box temperature detection method according to claim 7, wherein: the specific calculation method for the time for the axle boxes located in the same bogie in the step S22 to reach the intersection a, the intersection B, the intersection C and the intersection D from the speed measuring device is as follows:
；
in the above-mentioned method, the step of,the distance between the intersection point B and the intersection point C along the double-track direction and the second magnetic steel of the speed measuring device is smaller than the distance between the intersection point A and the intersection point D along the double-track direction and the second magnetic steel;
in the step S22, when the axle boxes located in the same bogie reach the intersection point a, the intersection point B, the intersection point C and the intersection point D, the angular speed at which the driving element drives the infrared camera to rotate should be:
；
in the above-mentioned method, the step of,four follow-up imaging devices are arranged at the intersection point A and the intersection pointB. The distance between the intersection point C and the intersection point D.
9. The following subway train axle box temperature detection method according to claim 8, wherein: the adjusting process of the angular velocity in the step S3 is as follows:
the servo motor drives the infrared camera to rotate at a certain angular acceleration a (t), and the infrared camera rotates at the timeThe back angular velocity isAnd just complete N- (-)>) Rotation of the ring; wherein the angular acceleration->The following formula is satisfied:
;
;
；
in the above-mentioned method, the step of,is->When the axle boxes positioned on the same bogie pass through the speed measuring device, namely when the number output by the counter is even, the angular speed of the infrared camera, the lens of the infrared camera and the double-trackAn included angle between the vertical lines; n is an integer, whereinn＜ N-(/>)。
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