CN204287066U - A kind of fastener disappearance pick-up unit of structure based light - Google Patents
A kind of fastener disappearance pick-up unit of structure based light Download PDFInfo
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- CN204287066U CN204287066U CN201420701416.1U CN201420701416U CN204287066U CN 204287066 U CN204287066 U CN 204287066U CN 201420701416 U CN201420701416 U CN 201420701416U CN 204287066 U CN204287066 U CN 204287066U
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Abstract
A kind of fastener disappearance pick-up unit of structure based light, comprise structure infrared light supply system and image capturing system, the described infraluminescence source of structure infrared light supply system and the image acquisition device of image capturing system are all placed in the top of vehicle bottom sleeper, described infraluminescence source is placed in directly over rail clip and infraluminescence source vertical ground and irradiates the light belt being formed and be parallel to rail to rail clip, described image acquisition device aims at the shooting of described rail clip and the position that described image acquisition device is arranged makes image acquisition device and the infrared light be radiated on rail clip form the shooting angle of 30 ~ 45 degree.The recognition speed that the utility model improves prior art is slow, the shortcoming that error rate is large, and it is strong that environment is suitable for ability, can meet the automatic detection at a high speed.
Description
Technical field
The utility model relates to field of railway track accurate measurement, is a kind of fastener disappearance pick-up unit of structure based light.
Background technology
Fastener is the parts that connection rail and sleeper make it to be formed the section of track, at guarantee orbital stability, reliability important role.On railway infrastructure detects, China is for a long time based on artificial and Static Detection, and China Express Railway fast development in recent years, has higher requirement to the robotization of railway detection, real-time.Existing fastener detection technique is visual pattern detection technique both at home and abroad, as the VIS system of ENSCO company of the U.S., the photo-electric rail detection system of German company exploitation and Beijing good fortune Sida Company high speed vehicular orbital image recognition system etc.This method is all take to gather fastener full picture with high-speed camera, then carries out image procossing, judges whether fastener exists.High-speed camera picture collection speed, up to hundreds of frame, is easy to although gather, and gathers the image that expands of data, and process judgement is got up but very spended time.Reason is that picture information quantity is very large, and Railway Site environment is very complicated, requires very high to the difficulty of image procossing.Therefore, under the environment that road speed is so high, should use very difficult.
Through the retrieval of existing detection technique, find that " the rail fastener high-speed inspection System and method for of structure based light " of Shanghai Communications University also refer to structured light and reduce application in identification at railway.Adopt 4 ~ 8 road structure light sources to throw light on, the image then obtained, according to the quantity of continuous striation, uses statistical rule to carry out contacting piece and carries out Discern and judge.
Utility model content
The utility model object be solve the deficiencies in the prior art and provide a kind of make take after image recognition rate high, improve image recognition rate, can to the off-line of railway fastener or online Real time identification, simultaneously to the preservation of the ill collection of fastener image and the numbering in geographic position, be convenient to the fastener disappearance pick-up unit of the structure based light of the maintenance of staff under line.
The utility model is achieved through the following technical solutions:
A kind of fastener disappearance pick-up unit of structure based light, comprise structure infrared light supply system and image capturing system, the described infraluminescence source of structure infrared light supply system and the image acquisition device of image capturing system are all placed in the top of vehicle bottom sleeper, described infraluminescence source is placed in directly over rail clip and infraluminescence source vertical ground and irradiates the light belt being formed and be parallel to rail to rail clip, described image acquisition device aims at the shooting of described rail clip and its position makes image acquisition device and the infrared light path be radiated on rail clip form the shooting angle of 30 ~ 45 degree.
The straight line that described infraluminescence source and image acquisition device are formed is parallel with sleeper, every root rail is provided with the fastener that two cover described structure infrared light supply systems and image capturing system detect both sides inside and outside this rail respectively.
Described infraluminescence source comprises three road linear lightings, wherein be radiated at together on the sleeper apart from this detection fastener edge 3 ~ 7cm and form location structure light, all the other twice are radiated at above fastener, and on the screw rod being wherein radiated at fastener together and spring, another road is only radiated on spring.
Also comprise with computer control system, gps system or/and be arranged on the photoelectric encoder on train axle, described gps system is or/and the photoelectric encoder be arranged on train axle is connected with image capturing system and computer control system, described image capturing system according to gps system or/and be arranged on the velocity information that the photoelectric encoder on train axle provides to carry out triggering shooting via computer control system to image acquisition device, and by the preservation that the storer of computer control system is real-time, by GPS record position information on image while storage.
Owing to adopting said structure, the shooting angle of 30 ~ 45 degree is formed by image acquisition device and rail clip, thus when Ballast track, the light source be radiated at above sleeper presents long and straight lines in the picture, present in disorder spot how above stone; When non-fragment orbit, be radiated at the light source of sleeper, because sleeper and track plates are all smooth, image is all present with straight line, but because video camera and vertical direction exist inclination angle, sleeper and track plates will present disjoint parallel lines in the picture, the same like this position that can navigate to sleeper very soon, thus find fastener position (as long as revising the parameter of coupling in actual application according to different tracks) by sleeper.The object of sleeper is found to be easilier on photo, find fastener area, the calculating of full figure inside conventional images identification can be greatly reduced, and then Characteristic Contrast can be carried out for comparatively zonule, can detection speed be accelerated like this, judge the disease of fastener faster.
Described infraluminescence source adopts three road linear lightings, wherein be radiated at together range image collector projection 3 ~ 7cm sleeper on form location structure light, all the other twice are radiated at above fastener, on the screw rod being wherein radiated at fastener together and spring, another road is only radiated on spring, the location structure be radiated on sleeper is only located for the identification of image, and in addition whether twice light wherein detect the existence of railway spike together, and whether other one auxiliary detection fastening elastic rod defect.
At the image of fastener area, due to the height change of the spring of fastener own and screw rod, by the independent contrast of image fastener area, present the change in light image in the picture.Having fastener and rupturing without fastener and fastener, have screw rod and without in the various situations of screw rod, have obvious characteristics of image, by corresponding stencil matching, thus the deletion condition realizing contacting piece does identification judgement.
By gps system or/and the velocity information that photoelectric encoder provides carries out triggering shooting via control system to camera, and the image that real-time preservation is filmed, by the kilometer post information on GPS and train, picture is numbered, the positional information of records photographing in the picture, so that to the correspondence in geographic position during later stage picture, thus this deletion sites can be found after convenient detection disappearance, contacting piece is safeguarded.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model.
Fig. 2 is the schematic diagram that infraluminescence source is radiated on sleeper and fastener.
Embodiment
Below in conjunction with accompanying drawing, the utility model patent is described further.
As shown in Figure 1, a kind of fastener of structure based light disappearance pick-up unit, comprises structure infrared light supply system, image capturing system, gps system or/and the photoelectric encoder that is arranged on train axle and computer control system four macrostructure.Wherein the infraluminescence source 5 in structure infrared light supply system and the image acquisition device 6 in image capturing system are placed in above the outer sleeper of car body, wherein infraluminescence source 5 is positioned at directly over fastener, infraluminescence source 5 sends the light belt being parallel to rail, and the position that image acquisition device 6 is arranged makes image acquisition device 6 and rail clip form the shooting angle of 30 ~ 45 degree; Gps system is or/and the photoelectric encoder that is arranged on train axle and computer control system are positioned at the control enclosure of whole system, trigger pip is provided to image acquisition device 6, real-time collection infraluminescence source 5 is radiated at the image that after on fastener, infrared ray is formed, and its image is stored, then processed by image recognition simultaneously.
Above-mentioned photoelectric encoder is be arranged on being used on train axle to measure the device of axletree rotating speed (dynamic inspection car is provided with this photoelectric encoder in advance usually, there is the interface of increasing income), axletree often rotates one week, photoelectric encoder produces N number of pulse, rotating can be judged simultaneously, according to the girth of wheel, accurately can obtain the speed of vehicle, can judge that vehicle is in forward and back state simultaneously, trigger pip is provided for triggering to take pictures, guarantee to photograph all fasteners, that reduces fastener repeats shooting simultaneously.Photoelectric encoder is compared with gps system, and it is high that the defect of gps system is that precision is not so good as photoelectric encoder, is also subject to the impact of external condition simultaneously, such as tunnel, mountain area signal are weak, impact triggers the accuracy of shooting, therefore when selecting rate signal, preferentially uses photoelectric encoder.The gps system location adopted obtains geographic signal, realizes the corresponding of picture and geographic position.
Light source uses infrared light, and wavelength is the structured light of 850NM to 950NM.Described infraluminescence source 5 comprises three road linear lightings, wherein one light source irradiation forms location structure light 2 on the sleeper apart from this fastener edge 3 ~ 7cm, all the other twice light sources 1 are radiated at above fastener, on the screw rod 41 being wherein radiated at fastener together and spring 42, another road is only radiated on spring 42.
Described image acquisition device adopts infrared high-speed camera.Be provided with optical filter before described infrared high-speed camera, optical filter is the high pass filter disc being greater than 800nm, can be good at mating with infrared light supply used.
Infrared high-speed camera and light source present 30 ~ miter angle degree with the line of fastener respectively.The line of camera and fastener is perpendicular to the light be radiated on fastener.
This device is worked by following step:
The first step: the power supply opening system, start-up simulation machine control system, opens gps system and infrared light supply, realizes the Initialize installation of system, completes preliminary work;
Second step: the velocity information provided by gps system carries out triggering shooting via control system to camera, and the image that real-time preservation is filmed, by the kilometer post information on GPS and train, preservation is numbered to picture, correspondence to geographic position when realizing picture, can find position on the line after test problems fastener, contacting piece is safeguarded.Usually dynamic inspection car is mounted with wheel to photoelectric encoder, and the interface of increasing income can be provided, thus the real-time speed of vehicle can be provided more accurately, be mounted with the vehicle of photoelectric encoder, using this encoder pulse rate signal to control shooting.
3rd step: image processing system is by the pre-service of image, first extract and be radiated at length on sleeper and level and smooth location structure light 2 (no matter having the tiny fragments of stone, coal, etc. without the tiny fragments of stone, coal, etc.), then the center of sleeper is located in the picture, find fastener area again, contacting piece regional carries out crucial feature extraction, reaches the target of the situation analyzing fastener fast and effectively.
Test the image of the normal sleeper collected: by converting normal binary map after pre-service to, in binary map, white portion is the radiation response of three infrared structure light sources.In image processing process, intercept sleeper domain of the existence, first locate the center of sleeper, then according to the position positioning screw of sleeper and the position of spring, more each part is contrasted separately.
The sleeper part intercepted is schemed separately, and (location of sleeper is exactly find the straight line connected domain that reaches requirement length in binary map, calculate the barycenter of this straight line connected domain) simultaneously, determine center, then in binary map, find the relative position of spring position and screw rod.Form the first figure respectively, the second figure, the 3rd figure.
Again to the first figure, the second figure, compares in the image of the 3rd figure.Various ways can be taked in comparison process.In this example, in the following way, if 2 enough large white connected domains appear in spring region, show that the spring of this survey fastener is normal.Whether the position of middle screw rod is mated with standard masterplate, normal according to matching degree determination fastener screw.(because the fastener type that different circuit adopts is different, we can carry out different segmentations and characteristic matching to image targetedly).
In process of the test, the pathological situation of the fastener of our simulation, by the new binary map changed after pre-service, by new binary map compared with normal binary map, difference is huge, thus can be clear and definite analyze fastening elastic rod and screw rod does not exist, fastener screw still exists, spring lacks, and in like manner image reflection is also clearly.
Obviously we can find very large difference in ill fastener and normal fastener image, and the calculated amount of image procossing is little, thus realize fastener identification fast and accurately.
Claims (4)
1. the fastener disappearance pick-up unit of a structure based light, it is characterized in that: comprise structure infrared light supply system and image capturing system, the described infraluminescence source of structure infrared light supply system and the image acquisition device of image capturing system are all placed in the top of vehicle bottom sleeper, described infraluminescence source is placed in directly over rail clip and infraluminescence source vertical ground and irradiates the light belt being formed and be parallel to rail to rail clip, described image acquisition device aims at the shooting of described rail clip and its position makes image acquisition device and the infrared light path be radiated on rail clip form the shooting angle of 30 ~ 45 degree.
2. the fastener disappearance pick-up unit of structure based light according to claim 1, it is characterized in that: the straight line that described infraluminescence source and image acquisition device are formed is parallel with sleeper, every root rail is provided with the fastener that two cover described structure infrared light supply systems and image capturing system detect both sides inside and outside this rail respectively.
3. the fastener disappearance pick-up unit of structure based light according to claim 2, it is characterized in that: described infraluminescence source comprises three road linear lightings, wherein be radiated at together on the sleeper apart from this detection fastener edge 3 ~ 7cm and form location structure light, all the other twice are radiated at above fastener, on the screw rod being wherein radiated at fastener together and spring, another road is only radiated on spring.
4. according to the fastener disappearance pick-up unit of the structure based light one of claims 1 to 3 Suo Shu, it is characterized in that: also comprise and computer control system, gps system is or/and be arranged on the photoelectric encoder on train axle, described gps system is or/and the photoelectric encoder be arranged on train axle is connected with image capturing system and computer control system, described image capturing system according to gps system or/and be arranged on the velocity information that the photoelectric encoder on train axle provides to carry out triggering shooting via computer control system to image acquisition device, and by the preservation that the storer of computer control system is real-time, by GPS record position information on image while storage.
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| CN201420701416.1U CN204287066U (en) | 2014-11-20 | 2014-11-20 | A kind of fastener disappearance pick-up unit of structure based light |
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| CN201420701416.1U CN204287066U (en) | 2014-11-20 | 2014-11-20 | A kind of fastener disappearance pick-up unit of structure based light |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802305A (en) * | 2016-11-21 | 2017-06-06 | 河南辉煌科技股份有限公司 | A kind of method that tunnel inspection is carried out using train |
| CN109916751A (en) * | 2019-03-18 | 2019-06-21 | 中铁二院工程集团有限责任公司 | A kind of steep gradient ballast track bed long-term stable experiment device and test method |
| CN110161043A (en) * | 2019-05-10 | 2019-08-23 | 同济大学 | A kind of subway tunnel structure synthetic detection vehicle |
-
2014
- 2014-11-20 CN CN201420701416.1U patent/CN204287066U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802305A (en) * | 2016-11-21 | 2017-06-06 | 河南辉煌科技股份有限公司 | A kind of method that tunnel inspection is carried out using train |
| CN109916751A (en) * | 2019-03-18 | 2019-06-21 | 中铁二院工程集团有限责任公司 | A kind of steep gradient ballast track bed long-term stable experiment device and test method |
| CN109916751B (en) * | 2019-03-18 | 2023-11-17 | 中铁二院工程集团有限责任公司 | Long-term stability test device and test method for ballast bed of large ramp |
| CN110161043A (en) * | 2019-05-10 | 2019-08-23 | 同济大学 | A kind of subway tunnel structure synthetic detection vehicle |
| CN110161043B (en) * | 2019-05-10 | 2021-03-26 | 同济大学 | Subway tunnel structure comprehensive detection vehicle |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150422 Termination date: 20171120 |