CN104237381A - Steel rail flaw-detection method based on laser ultrasonic and high-speed photography image fusion - Google Patents
Steel rail flaw-detection method based on laser ultrasonic and high-speed photography image fusion Download PDFInfo
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- CN104237381A CN104237381A CN201410546492.4A CN201410546492A CN104237381A CN 104237381 A CN104237381 A CN 104237381A CN 201410546492 A CN201410546492 A CN 201410546492A CN 104237381 A CN104237381 A CN 104237381A
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Abstract
The invention relates to the field of steel rail flaw-detection, in particular to a steel rail flaw-detection method based on laser ultrasonic and high-speed photography image fusion. The steel rail flaw-detection method comprises the following steps that: step 1, a laser ultrasonic excitation module and a high-speed photography module are installed on a steel rail flaw-detection car; step 2, the steel rail flaw-detection car moves along a steel rail to be detected, meanwhile, the laser ultrasonic excitation module transmits a pulse laser to the surface of the steel rail to be detected, so as to obtain laser ultrasonic detection data; moreover, the high-speed photography module photographs the surface of the steel rail to be detected to obtain digital image signal data; step 3, the laser ultrasonic detection data and the digital image signal data are fused together, and the flaw conditions of the steel rail to be detected are judged. The invention provides a flaw-detection method for obtaining the state of the actually-flawed surface of the steel rail and position information while carrying out flaw-detection on the steel rail, thus realizing the effective fusion of the laser ultrasonic detection data and the digital image signal data.
Description
Technical field
The present invention relates to rail examination field, particularly relate to the rail examination method of the image co-registration of a kind of laser-ultrasound and high-speed camera.
Background technology
Rail examination belongs to the one of section bar flaw detection, and UT (Ultrasonic Testing) is a kind of method conventional in rail examination.UT (Ultrasonic Testing) in defect interface, produces reflection according to directed radiation ultrasonic beam or makes through degradation principle under acoustic energy, by measuring echo information and changing a kind of method indicating damage through intensity of acoustic wave.The advantage such as UT (Ultrasonic Testing) has directive property is good, penetration capacity is strong, detection sensitivity is high, can detect various orientation defect, detection speed is fast, expense is low, but current method of detection can't obtain situation and the positional information of the Rail Surface occurring hurt while carrying out rail examination.
Summary of the invention
For above-mentioned technical matters, the present invention has designed and developed the rail examination method of the image co-registration of a kind of laser-ultrasound and high-speed camera, object is to provide a kind of while detecting a flaw to rail, obtain the rail actual generation surface state of hurt and the method for detection of positional information, realize the effective integration of laser ultrasonic detection data and data image signal data.
Technical scheme provided by the invention is:
A rail examination method for the image co-registration of laser-ultrasound and high-speed camera, comprises the following steps:
Step one, laser-ultrasound excitation module and high-speed camera module are installed on rail-defect detector car;
Step 2, described rail-defect detector car move along rail to be detected, and meanwhile, described laser-ultrasound excitation module emission pulse laser, to the surface of described rail to be detected, obtains laser ultrasonic detection data; And the described surface of high-speed camera module to rail to be detected is taken, and obtains data image signal data;
Step 3, by described laser ultrasonic detection data together with described data image signal data fusion, judge the hurt situation of rail to be detected.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
The transmission frequency of described laser-ultrasound excitation module emission pulse laser is directly proportional to the road speed of described rail-defect detector car on rail to be detected.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
The pulse laser that described laser-ultrasound excitation module is launched melts erosion effect in Rail Surface generation to be detected and inspires ultrasound wave, described ultrasonic permeability is inner to rail material to be detected, run into hurt defect and produce ultrasound echo signal, described ultrasound echo signal is by air receive MUT, described air transducer is connected to ultrasonic electronic processing module, the laser ultrasonic detection Data Concurrent that described ultrasound echo signal is converted to digital form by described ultrasonic electronic processing module delivers to data fusion module, described high-speed camera module acquires to data image signal data be also sent to data fusion module, to make both data fusion.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
The picture-taken frequency of described high-speed camera module is directly proportional to the road speed of described rail-defect detector car on rail to be detected.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
Described laser ultrasonic detection data and described data image signal data fusion synthetic image form, for flaw detection personal identification.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
Described image format comprise rail to be detected shape and on hurt defect.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
Described image format is passed to remote terminal, carries out analysis judge for Remote.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
When the described surface of high-speed camera module to rail to be detected is taken, the position of described rail-defect detector car on rail to be detected is recorded simultaneously, obtains the location information data of rail-defect detector car.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
The location information data of described laser ultrasonic detection data, described data image signal data and described rail-defect detector car is all sent to described data fusion module, obtains fused data.
Preferably, in the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera,
Described rail-defect detector car is provided with GPS locating module, described GPS locating module is according to the positional information of picture-taken frequency record rail-defect detector car on rail to be detected of described high-speed camera module.
In the rail examination method of the image co-registration of laser-ultrasound of the present invention and high-speed camera, the pulse laser that described laser-ultrasound excitation module is launched melts erosion effect in Rail Surface generation to be detected and inspires ultrasound wave, described ultrasonic permeability is inner to rail material to be detected, run into hurt defect and produce ultrasound echo signal, described ultrasound echo signal transfers to ultrasonic electronic processing module, the laser ultrasonic detection Data Concurrent that described ultrasound echo signal is converted to digital form by described ultrasonic electronic processing module delivers to data fusion module, described high-speed camera module acquires to data image signal data and described GPS locating module be also sent simultaneously to data fusion module according to the positional information of the rail-defect detector car of the picture-taken frequency record of described high-speed camera module on rail to be detected, to make three's data fusion synthetic image form, for flaw detection personal identification, thus achieve while rail is detected a flaw, obtain surface state and the positional information of rail actual generation hurt, make rail examination data more complete, later stage repair process is also more convenient.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the rail examination method of the image co-registration of laser-ultrasound of the present invention and high-speed camera.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to instructions word to make those skilled in the art.
As shown in Figure 1, the invention provides the rail examination method of the image co-registration of a kind of laser-ultrasound and high-speed camera, comprise the following steps:
Step one, rail-defect detector car is installed laser-ultrasound excitation module and high-speed camera module, when the Voice segment of laser is irradiated to elastomeric material surfaces, part can be transferred to material itself and show with the form of heat energy and stress wave kinetic energy, energy distribution in the material and the impact on material can be controlled by the geometric configuration changing excitation laser, laser-ultrasound is exactly the transient heat effect utilizing High Power Laser Pulses and material surface, strain and stress field is produced at solid surface by thermoelastic effect (a few cases is heat etching effect), particle is made to produce fluctuation, and then produce ultrasound wave at interior of articles,
Step 2, described rail-defect detector car move along rail to be detected, the road speed of rail-defect detector car presets according to actual needs, meanwhile, described laser-ultrasound excitation module emission pulse laser, to the surface of described rail to be detected, obtains laser ultrasonic detection data; And the described surface of high-speed camera module to rail to be detected is taken, obtain data image signal data, the frequency that transmission frequency and the surface of high-speed camera module to rail to be detected of laser-ultrasound excitation module emission pulse laser are taken is consistent, namely laser-ultrasound excitation module often launches pulsatile once laser, and the surface of high-speed camera module to the rail to be detected of current location is once taken;
Step 3, by described laser ultrasonic detection data together with described data image signal data fusion, and send to flaw detection main frame, flaw detection main frame judges the hurt situation of rail to be detected.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, the transmission frequency of described laser-ultrasound excitation module emission pulse laser is directly proportional to the road speed of described rail-defect detector car on rail to be detected, when the road speed of rail-defect detector car on rail to be detected is fast, the transmission frequency of laser-ultrasound excitation module emission pulse laser is high, and the different parts that pulse laser acts on rail to be detected with the shorter time interval detects; When the road speed of rail-defect detector car on rail to be detected is slow, the transmission frequency of laser-ultrasound excitation module emission pulse laser is low, and the different parts that pulse laser acts on rail to be detected with the longer time interval detects.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, the pulse laser that described laser-ultrasound excitation module is launched melts erosion effect in Rail Surface generation to be detected and inspires ultrasound wave, described ultrasonic permeability is inner to rail material to be detected, run into hurt defect and produce ultrasound echo signal, described ultrasound echo signal is by air receive MUT, described air transducer is connected to ultrasonic electronic processing module, the laser ultrasonic detection Data Concurrent that described ultrasound echo signal is converted to digital form by described ultrasonic electronic processing module delivers to data fusion module, described high-speed camera module acquires to data image signal data be also sent to data fusion module, both data fusion of the rail current location obtained to make synchronization.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, the picture-taken frequency of described high-speed camera module is directly proportional to the road speed of described rail-defect detector car on rail to be detected, when the road speed of rail-defect detector car on rail to be detected is fast, the frequency of high-speed camera module acquires rail image is high, and the camera of high-speed camera module is taken pictures with the different parts of the shorter time interval to rail to be detected; When the road speed of rail-defect detector car on rail to be detected is slow, the frequency of high-speed camera module acquires rail image is low, and the camera of high-speed camera module is taken pictures with the different parts of the longer time interval to rail to be detected.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, described laser ultrasonic detection data and described data image signal data fusion synthetic image form, for flaw detection personal identification, flaw detection personnel, while rail defects and failures being detected, also can obtain the surface appearance of the rail occurring hurt.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, described image format comprise rail to be detected shape and on hurt defect, when often detecting that hurt appears in a certain position of rail, the image information of the surface appearance of the rail of this position also appears in the image format after fusion simultaneously.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, described image format is passed to remote terminal, carry out analysis for Remote to judge, the duty that such Remote need not follow rail-defect detector car on the spot just can the result of grasp rail examination promptly and accurately, achieves remote monitoring.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, when the described surface of high-speed camera module to rail to be detected is taken, the position of described rail-defect detector car on rail to be detected is recorded simultaneously, obtain the location information data of rail-defect detector car, namely high-speed camera module often gathers the state of a Rail Surface, and the current location of rail-defect detector car will by synchronous recording.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, the location information data of described laser ultrasonic detection data, described data image signal data and described rail-defect detector car is all sent to described data fusion module, obtains fused data.
In the rail examination method of described laser-ultrasound and the image co-registration of high-speed camera, described rail-defect detector car is provided with GPS locating module, described GPS locating module is according to the positional information of picture-taken frequency record rail-defect detector car on rail to be detected of described high-speed camera module, namely there is the more specific location information of the rail of hurt, hurt situation, occur the rail of hurt surface appearance and occur that the location of rail of hurt is recorded simultaneously and be fused into detailed image format, as the reference that follow-up flaw detection process is repaired.
Although embodiment of the present invention are open as above, but it is not restricted to listed in instructions and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (10)
1. a rail examination method for the image co-registration of laser-ultrasound and high-speed camera, is characterized in that, comprise the following steps:
Step one, laser-ultrasound excitation module and high-speed camera module are installed on rail-defect detector car;
Step 2, described rail-defect detector car move along rail to be detected, and meanwhile, described laser-ultrasound excitation module emission pulse laser, to the surface of described rail to be detected, obtains laser ultrasonic detection data; And the described surface of high-speed camera module to rail to be detected is taken, and obtains data image signal data;
Step 3, by described laser ultrasonic detection data together with described data image signal data fusion, judge the hurt situation of rail to be detected.
2. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 1 and high-speed camera, is characterized in that,
The transmission frequency of described laser-ultrasound excitation module emission pulse laser is directly proportional to the road speed of described rail-defect detector car on rail to be detected.
3. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 2 and high-speed camera, is characterized in that,
The pulse laser that described laser-ultrasound excitation module is launched melts erosion effect in Rail Surface generation to be detected and inspires ultrasound wave, described ultrasonic permeability is inner to rail material to be detected, run into hurt defect and produce ultrasound echo signal, described ultrasound echo signal is by air receive MUT, described air transducer is connected to ultrasonic electronic processing module, the laser ultrasonic detection Data Concurrent that described ultrasound echo signal is converted to digital form by described ultrasonic electronic processing module delivers to data fusion module, described high-speed camera module acquires to data image signal data be also sent to data fusion module, to make both data fusion.
4. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 3 and high-speed camera, is characterized in that,
The picture-taken frequency of described high-speed camera module is directly proportional to the road speed of described rail-defect detector car on rail to be detected.
5. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 4 and high-speed camera, is characterized in that,
Described laser ultrasonic detection data and described data image signal data fusion synthetic image form, for flaw detection personal identification.
6. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 5 and high-speed camera, is characterized in that,
Described image format comprise rail to be detected shape and on hurt defect.
7. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 6 and high-speed camera, is characterized in that,
Described image format is passed to remote terminal, carries out analysis judge for Remote.
8. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 4 and high-speed camera, is characterized in that,
When the described surface of high-speed camera module to rail to be detected is taken, the position of described rail-defect detector car on rail to be detected is recorded simultaneously, obtains the location information data of rail-defect detector car.
9. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 8 and high-speed camera, is characterized in that,
The location information data of described laser ultrasonic detection data, described data image signal data and described rail-defect detector car is all sent to described data fusion module, obtains fused data.
10. the rail examination method of the image co-registration of laser-ultrasound as claimed in claim 9 and high-speed camera, is characterized in that,
Described rail-defect detector car is provided with GPS locating module, described GPS locating module is according to the positional information of picture-taken frequency record rail-defect detector car on rail to be detected of described high-speed camera module.
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