CN102556119B - Method for directly collecting gap data measured by indication lever gap image of railway point switch - Google Patents
Method for directly collecting gap data measured by indication lever gap image of railway point switch Download PDFInfo
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- CN102556119B CN102556119B CN201110425828.8A CN201110425828A CN102556119B CN 102556119 B CN102556119 B CN 102556119B CN 201110425828 A CN201110425828 A CN 201110425828A CN 102556119 B CN102556119 B CN 102556119B
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Abstract
The invention relates to a method for directly collecting gap data measured by an indication lever gap image of a railway point switch, which is characterized by comprising the following steps: storing the collected indication lever gap image; reading the indication lever gap image to be processed; limiting an indication lever gap into a preset area; obtaining an edge coordinate of an L-shaped gap indicator in the indication lever gap image; extracting the edge information of a gap by using an SOBEL edge searching method; filtering the edge information morphology of the gap into a gap analysis image; carrying out histogram statistic on the gap analysis image to obtain two edges of the gap; accurately searching the two edges of the gap to obtain an edge coordinate of the gap; obtaining notch data according to the image resolution ratio and the coordinate; and outputting the coordinate and the gap data, newly collecting the said rod gap image and repeating all the steps. The method has the beneficial effects that a mark is not required to be set, the point switch is not required to be improved, and the results are not influenced by the mark setting precision and are more accurate.
Description
Technical field
The present invention relates to goat indication rod Gap monitoring technical field, specifically a kind ofly gather the method that goat indication rod gap image draws gap data.
Background technology
Along with developing rapidly of China railways modernization construction, train running speed and train operation density also improve thereupon greatly, are the quality state making railway signals equipment keep good, have higher requirement to efficient, the science of handling labor.
Switch machine is that railway switch control system obtains main signalling set, and except for except the conversion of track switch and locking, the size of switch machine indication rod notch side-play amount reflects point tongue (and core rail) present position and state.
Switch machine is provided with L-type breach indicateing arm (the mainly vertical component of indicateing arm, horizontal component is only used for fixing), indication rod upper boom, indication rod lower beam.
Indication rod upper boom is provided with breach (gap width 6mm ~ 7mm), and indication rod lower beam is also provided with breach (gap width 6mm ~ 7mm).The breach of indication rod upper boom and the breach of indication rod lower beam are referred to as indication rod breach.L-type breach indicateing arm immobilizes, and indication rod upper boom and indication rod lower beam all may sway, the namely breach of indication rod upper boom and breach all possibility sway of indication rod lower beam.
During normal work, switch machine has 2 positions, is location and antiposition respectively, namely determines antiposition location information.
Switch machine in location, the breach of indication rod upper boom just to the center of L-type breach indicateing arm, now, the left margin of L-type breach indicateing arm to rod notch on indication rod left margin between distance, claim locating notch, the size of its distance, is called locating notch data.
Switch machine in antiposition, the breach of indication rod lower beam just to the center of L-type breach indicateing arm, now, the left margin of L-type breach indicateing arm to rod notch under indication rod left margin between distance, claim antiposition breach, the size of its distance, is called antiposition gap data.
Locating notch data and antiposition gap data are referred to as gap data.
Due to switch machine working environment very severe, act frequently, rail temperature change in addition, track circuit is rebuild, and the abrasion of track switch rod member are spacious to be moved, and indication rod state can be changed, when breach side-play amount exceeds standard, have a strong impact on traffic safety.
Switch machine indication rod notch monitoring product mainly contains switching value formula, digital, video type.
Switching value formula Gap monitoring product, cheap, easy for installation and have nothing to do with the environment such as humiture, but it can only qualitative detection switch machine indication notch state, the variable condition of breach can not be quantized completely, slowly by market.
Digital Gap monitoring product, achieve the quantification of breach variable condition, but due to directly perceived not, operating personnel need learn and remember the implication of the different digital of monitoring on Transmission, then according to the state of numerical analysis breach, higher to the requirement of operating personnel.
Video type Gap monitoring product, can check switch machine indication rod notch image intuitively at any time, improve work efficiency, decrease the working strength of operating personnel, not by environmental restraint.
But current its resolution ratio of camera head of video surveillance formula notch monitor is low, and use on-the-spot nearly up to a hundred switch machines, compression of images is JPG digital image by the picture pick-up device in switch machine, upload to equipment machine room respectively, concentrate and calculate breach side-play amount by monitoring of software, picture quality has loss, and processing speed is slow, real-time is not strong, does not have car video, vibration video, humiture, vibration intensity monitoring function.
In addition, current video surveillance mode is all the size of indirect calculation breach, its method is: in switch machine, breach is other determines a fixed position, do a mark, as drawn a straight line, in switch machine, indentation, there fixes a sheetmetal, sheetmetal moves with breach, sheetmetal is drawn a straight line, with the straight line parallel of mark, camera is adopted to take pictures to breach, obtain gap image, gap image is analyzed, calculate mark straight line and with breach movement straight line between position coordinate poor, according to the corresponding relation determined, the size of indirect calculation breach.Due to mark will be arranged on indication rod, need transform switch machine, construct more difficult, mark arrange precision also compare be difficult to control.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists, the object of this invention is to provide a kind of method of direct collection gap data measured by indication lever gap image of railway point switch, the method comprises the following steps:
1), the indication rod gap image that arrives of storage of collected;
2), indication rod gap image to be processed is read;
3), on indication rod gap image, be limited to by indication rod breach in a region of presetting, the restriction parameter in this region is preset according to the indication rod gap image collected; The marginal vertical coordinate vertical coordinate axle set between indication rod upper boom and indication rod lower beam is designated as y0;
4) the indication rod gap image in image in localized area is comprised to the process of binaryzation and shape filtering, then carry out feature extraction, obtain the edge figure of L-type breach indicateing arm in indication rod gap image; Carry out statistics with histogram to the edge figure of L-type breach indicateing arm, the left margin coordinate that horizontal axis obtains L-type breach indicateing arm is designated as x1, right edge coordinate is designated as x2;
5), SOBEL edge lookup method extraction step 3 is adopted) side information of indication rod breach in the localized area that obtains in image;
6), for the side information of the indication rod breach extracted carry out morphologic filtering, obtain gap analysis image, and regular process is carried out to gap analysis image;
7), for gap analysis image carry out statistics with histogram, secondary conversion is carried out to the histogram counted on, obtain two edges of indication rod breach;
8), accurate edge is carried out for two edges of the indication rod breach obtained search, horizontal axis show breach two edge coordinate and breach left margin coordinate are designated as x3, the right edge coordinate of breach is designated as x4; Get and breach left margin is a bit designated as x3, y3; Or get on the right of breach and be a bit designated as x4, y4 along upper;
Carry out accurate edge when searching:
First, utilize the method for matching to carry out accurate edge and search: after finding two edge lines, find two edge lines are extended, accurate locating notch two edge, draw breach left margin coordinate, draw the right edge coordinate of breach;
If the method for matching lost efficacy, then utilize rectangle sample characteristics extracting method to carry out accurate edge to search: the difference between about detection rectangle computed image, the maximum point of image left-right difference is the point on image, final accurately locating notch two edge, draws breach left margin coordinate, draws the right edge coordinate of breach;
If the method for matching, rectangle sample characteristics extracting method all lost efficacy, then two edges by obtaining histogram carried out statistics and carry out accurate edge and search, and drew breach left margin coordinate, drew the right edge coordinate of breach;
9) draw along upper a bit vertical coordinate y4 on the right of the demarcation line vertical coordinate y0 between the indication rod upper boom that, basis is default and indication rod lower beam, the vertical coordinate y3 of any on breach left margin or breach and determine antiposition location information;
According to resolution and the left margin coordinate of L-type breach indicateing arm obtained, the right edge coordinate of L-type breach indicateing arm of the indication rod gap image gathered, breach left margin coordinate, the right edge coordinate of breach draw gap data;
10), export described in determine antiposition location information, the left margin coordinate of L-type breach indicateing arm, the right edge coordinate of L-type breach indicateing arm, breach left margin coordinate, the right edge coordinate of breach and described gap data;
11), Resurvey indication rod gap image repeat above step again.
As further technical scheme of the present invention:
This goat indication rod breach video monitoring method, step 10) in, export by the right edge coordinate of the left margin coordinate of L-type breach indicateing arm, L-type breach indicateing arm, described marginal vertical coordinate, breach left margin coordinate, the right edge coordinate of breach and described gap data are marked on described indication rod gap image.
The invention has the beneficial effects as follows: the method does not need to arrange mark at switch machine in advance, thus do not need to carry out any transformation to switch machine, but directly directly draw gap data according to the switch machine indication rod notch image collected; The system that during specific implementation, the method relies on does not need new cabling, can according to field condition flexible networking; Arrange easier, namely the method is conducive to the difficulty of the realization reducing Gap monitoring system.And can avoid arranging the impact of precision on the accuracy rate of monitoring result because of what indicate itself, make monitoring result more accurate, error is less, and the error meeting breach is not more than the requirement of 0.1mm.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described further:
Fig. 1 is the diagram of circuit of the embodiment of the present invention;
Detailed description of the invention
As shown in Figure 1, this directly gathers the method for gap data measured by indication lever gap image of railway point switch, comprises the following steps:
1), the described indication rod gap image collected is stored into the designated area of memory device;
2), indication rod gap image to be processed is read;
3), on indication rod gap image, be limited to by indication rod breach in a region of presetting, the restriction parameter in this region is preset according to the indication rod gap image collected; The marginal vertical coordinate vertical coordinate axle set between indication rod upper boom and indication rod lower beam is designated as y0;
4) the indication rod gap image in image in localized area is comprised to the process of binaryzation and shape filtering, then carry out feature extraction, obtain the edge figure of L-type breach indicateing arm in indication rod gap image; Statistics with histogram is carried out to the edge figure of L-type breach indicateing arm, horizontal axis obtains the left margin coordinate of L-type breach indicateing arm, right edge coordinate; The left margin coordinate of L-type breach indicateing arm is designated as x1, right edge coordinate is designated as x2;
5), SOBEL edge lookup method extraction step 3 is adopted) side information of indication rod breach in the localized area that obtains in image; Searching effect to pursue moderate edge, can limit parameter, the information for the pixel of image care carries out trimming edge;
6), for the side information of the indication rod breach extracted carry out morphologic filtering, i.e. the opening and closing operation of image, form gap analysis image, and regular process is carried out to gap analysis image, after regular process, obtain image; During regular process, if the interfere information in the middle of image is many, regular process can be realized by carrying out erosion operation, if the information of image is not obvious, regular process can be realized by carrying out dilation operation;
7), for gap analysis image carry out statistics with histogram, because the not of uniform size up and down of image causes, therefore secondary conversion is carried out to the histogram counted on, obtain two edges of breach; The ratio transformed can be adjusted by setup parameter;
8), accurate edge is carried out for two edges of the indication rod breach obtained search, horizontal axis show breach two edge coordinate and breach left margin coordinate are designated as x3, the right edge coordinate of breach is designated as x4; Get and breach left margin is a bit designated as x3, y3; Or get on the right of breach and be a bit designated as x4, y4 along upper;
Carry out accurate edge when searching:
First, utilize the method for matching to carry out accurate edge and search: after finding two edge lines, find two edge lines are extended, accurate locating notch two edge, draw breach left margin coordinate, draw the right edge coordinate of breach;
If the method for matching lost efficacy, then utilize rectangle sample characteristics extracting method to carry out accurate edge to search: the difference between about detection rectangle computed image, the maximum point of image left-right difference is the point on image, final accurately locating notch two edge, draws breach left margin coordinate, draws the right edge coordinate of breach;
If the method for matching, rectangle sample characteristics extracting method all lost efficacy, then two edges by obtaining histogram carried out statistics and carry out accurate edge and search, and drew breach left margin coordinate, drew the right edge coordinate of breach;
9) draw along upper a bit vertical coordinate y4 on the right of the demarcation line vertical coordinate y0 between the indication rod upper boom that, basis is default and indication rod lower beam, the vertical coordinate y3 of any on breach left margin or breach and determine antiposition location information;
Because when switch machine is in a position, the breach of indication rod upper boom, both breach of indication rod lower beam can only have one, if switch machine is in location, it is the breach of indication rod upper boom, then breach is higher than demarcation line, marginal vertical coordinate y0 described in the vertical coordinate of point y3 or y4> namely on breach edge; If switch machine is in antiposition, be the breach of indication rod lower beam, then breach is lower than demarcation line, marginal vertical coordinate y0 described in the vertical coordinate of point y3 or y4< namely on breach edge;
The method utilizes the vertical coordinate y3 of any on breach left margin to carry out judging to determine antiposition location information.If y3>y0, then switch machine is in location; If y3<y0, then switch machine is in antiposition;
According to resolution and the left margin coordinate of L-type breach indicateing arm obtained, the right edge coordinate of L-type breach indicateing arm of the indication rod gap image gathered, breach left margin coordinate, the right edge coordinate of breach draw gap data;
The method collection be S700K switch machine indication rod notch image, S700K switch machine indication rod notch width is 6mm, calculate through coordinate, if breach the right and left is 302 along the difference between coordinate on horizontal shaft and X-axis, then image resolution ratio=6mm/302=0.0198mm;
Focal length due to camera in this application is fixed, so image resolution ratio is also fixing;
Calculate the left margin coordinate x1 of L-type breach indicateing arm and the difference of breach left margin coordinate x3, then gap data=0.0198 × | x1-x3|mm;
10), export described in determine antiposition location information, the left margin coordinate of L-type breach indicateing arm, the right edge coordinate of L-type breach indicateing arm, breach left margin coordinate, the right edge coordinate of breach and described gap data; That above-mentioned coordinate and gap data are marked with marking line on indication rod gap image in the method;
11), Resurvey indication rod gap image repeat above step again.
Gap image is directly adopted to carry out calculating breach size and calculating gap data by said method, need not mark be set, thus can avoid arranging the impact of precision on the accuracy rate of monitoring result because of what indicate itself, make monitoring result more accurate, error is less, and the error meeting breach is not more than the requirement of 0.1mm.
In addition, need not do again and indicate, thus not need when realizing to carry out scrap build to existing switch machine, make monitoring system installation realize easier.
The present invention is not limited only to above-described embodiment.
Claims (2)
1. directly gather the method for gap data measured by indication lever gap image of railway point switch, it is characterized in that, the method comprises the following steps:
1), the indication rod gap image that arrives of storage of collected;
2), indication rod gap image to be processed is read;
3), on indication rod gap image, be limited to by indication rod breach in a region of presetting, the restriction parameter in this region is preset according to the indication rod gap image collected; The marginal vertical coordinate vertical coordinate axle set between indication rod upper boom and indication rod lower beam is designated as y0;
4) the indication rod gap image in image in localized area is comprised to the process of binaryzation and shape filtering, then carry out feature extraction, obtain the edge figure of L-type breach indicateing arm in indication rod gap image; Carry out statistics with histogram to the edge figure of L-type breach indicateing arm, the left margin coordinate that horizontal axis obtains L-type breach indicateing arm is designated as x1, right edge coordinate is designated as x2;
5), SOBEL edge lookup method extraction step 3 is adopted) side information of indication rod breach in the localized area that obtains in image;
6), for the side information of the indication rod breach extracted carry out morphologic filtering, obtain gap analysis image, and regular process is carried out to gap analysis image;
7), for gap analysis image carry out statistics with histogram, secondary conversion is carried out to the histogram counted on, obtain two edges of indication rod breach;
8), accurate edge is carried out for two edges of the indication rod breach obtained search, horizontal axis show breach two edge coordinate and breach left margin coordinate are designated as x3, the right edge coordinate of breach is designated as x4; Get and breach left margin is a bit designated as x3, y3; Or get on the right of breach and be a bit designated as x4, y4 along upper;
Carry out accurate edge when searching:
First, utilize the method for matching to carry out accurate edge and search: after finding two edge lines, find two edge lines are extended, accurate locating notch two edge, draw breach left margin coordinate, draw the right edge coordinate of breach;
If the method for matching lost efficacy, then utilize rectangle sample characteristics extracting method to carry out accurate edge to search: the difference between about detection rectangle computed image, rest on the maximum point of image left-right difference, final accurately locating notch two edge, draws breach left margin coordinate, draws the right edge coordinate of breach;
If the method for matching, rectangle sample characteristics extracting method all lost efficacy, then two edges by obtaining histogram carried out statistics and carry out accurate edge and search, and drew breach left margin coordinate, drew the right edge coordinate of breach;
9) draw along upper a bit vertical coordinate y4 on the right of the demarcation line vertical coordinate y0 between the indication rod upper boom that, basis is default and indication rod lower beam, the vertical coordinate y3 of any on breach left margin or breach and determine antiposition location information;
According to resolution and the left margin coordinate of L-type breach indicateing arm obtained, the right edge coordinate of L-type breach indicateing arm of the indication rod gap image gathered, breach left margin coordinate, the right edge coordinate of breach draw gap data;
10), export described in determine antiposition location information, the left margin coordinate of L-type breach indicateing arm, the right edge coordinate of L-type breach indicateing arm, breach left margin coordinate, the right edge coordinate of breach and described gap data;
11), Resurvey indication rod gap image repeat above step again.
2. a kind of goat indication rod breach video monitoring method according to claim 1, it is characterized in that: step 10) in, export by the right edge coordinate of the left margin coordinate of L-type breach indicateing arm, L-type breach indicateing arm, described marginal vertical coordinate, breach left margin coordinate, the right edge coordinate of breach and described gap data are marked on described indication rod gap image.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105472355A (en) * | 2016-01-13 | 2016-04-06 | 江苏金晓电子信息股份有限公司 | Switch machine notch monitoring system and method based on binocular visual processing identification |
| CN110310255B (en) * | 2019-05-24 | 2023-01-10 | 同济大学 | Point switch notch detection method based on target detection and image processing |
| CN111161294B (en) * | 2019-12-10 | 2021-12-03 | 电子科技大学 | Turnout switch machine gap detection method based on histogram and straight line fitting |
| CN111145197B (en) * | 2019-12-10 | 2022-05-03 | 电子科技大学 | Accurate turnout switch machine notch edge positioning method based on histogram and local gradient |
| CN111127496B (en) * | 2019-12-10 | 2022-07-29 | 电子科技大学 | Turnout switch machine notch edge positioning method based on two-dimensional histogram and adaptive classification |
| CN111645721A (en) * | 2020-04-30 | 2020-09-11 | 浙江大学 | Switch machine point rail position monitoring system with redundant configuration and switch machine |
| CN113401168B (en) * | 2021-08-19 | 2021-11-02 | 齐鲁工业大学 | Track transfer device of inspection robot |
| CN115359449B (en) * | 2022-10-18 | 2023-01-24 | 济南铁路天龙高新技术开发有限公司 | Automatic identification method and system for turnout notch image of point switch |
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