CN102438356B - Light source regulating device and method - Google Patents

Light source regulating device and method Download PDF

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Publication number
CN102438356B
CN102438356B CN2011102778292A CN201110277829A CN102438356B CN 102438356 B CN102438356 B CN 102438356B CN 2011102778292 A CN2011102778292 A CN 2011102778292A CN 201110277829 A CN201110277829 A CN 201110277829A CN 102438356 B CN102438356 B CN 102438356B
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light source
module
counter
modular converter
host computer
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CN102438356A (en
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付家伟
龚军
季育文
颜琼
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Zhuzhou CSR Times Electric Co Ltd
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Zhuzhou CSR Times Electric Co Ltd
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Abstract

The invention provides a light source regulating device and a method. The light source regulating device comprises an upper computer and a regulator connected with the upper computer, and also comprises a power driving module and a light source connected with the power driving module; the regulator comprises a control panel, the control panel comprises an A/D (Analog/Digital) conversion module, a judgement module, a counting module, a photoelectrical coupling module and a D/A (Digital/Analog) conversion module, and the A/D conversion module is connected with the upper computer; the judgement module is provided with number ranges of a plurality of areas; the counting module comprises a plurality of counters, each counter is respectively connected with the judgement module, and each number range corresponds to each counter; the photoelectrical coupling module comprises a plurality of photoelectrical couplers which are respectively correspondingly connected with the counters, and each photoelectrical coupler is respectively connected with the D/A conversion module; and the power driving module is connected with the D/A conversion module, and controls the brightness regulation of the light source according to the signal of the D/A conversion module. By the invention, the light source can change according to the change of the natural environmental light.

Description

Light source adjustment device and method
Technical field
The present invention relates to railway territory, especially, relate to a kind of light source adjustment device.In addition, the invention still further relates to a kind of method that above-mentioned light source adjustment device carries out the light source adjusting of applying.
Background technology
Current Perambulated inspection system is in the process of measuring, and the light source that Perambulated inspection system is used system itself to carry irradiates object, so that the camera of Perambulated inspection system carries out image taking to object.
But object, can be through different periods and different locations in the process of operation.Like this, object the natural environment light in the external world of process always changing.Yet the light source that Perambulated inspection system itself carries can not change because of the variation of extraneous light, this has a great impact the high-quality target image of camera picked-up.
Summary of the invention
The object of the invention is to provide a kind of light source adjustment device and method, the technical problem that can not change because of the variation of extraneous natural environment light with the light source that solves Perambulated inspection system.
For achieving the above object, according to an aspect of the present invention, a kind of light source adjustment device is provided, this light source adjustment device comprises the host computer of a receiving target image and the adjuster be connected with host computer, and light source adjustment device also comprises electric power driving module and the light source be connected with electric power driving module; Adjuster comprises a control board, and control board comprises A/D modular converter, judge module, counting module, photoelectric coupling module and the D/A modular converter connected successively, and wherein, the A/D modular converter is connected with host computer; Judge module is provided with the number range in a plurality of zones, counting module comprises a plurality of counters, each counter is connected with judge module respectively, and corresponding each counter of each number range, the photoelectric coupling module comprises a plurality of photoelectrical couplers that are connected with each counter respectively, and each photoelectrical coupler all connects the D/A modular converter; Electric power driving module is connected in the D/A modular converter, and electric power driving module is controlled the brightness regulation of light source according to the signal of D/A modular converter.
Further, the initial value of each counter of counting module is zero, and each counter is provided with set point.
According to another aspect of the present invention, a kind of light source control method is provided, the method provides above-mentioned light source adjustment device, this light source control method in turn includes the following steps: step S01, the host computer of light source adjustment device is processed the target image of reception, thereby obtain the analog image strength signal, and the analog image strength signal is sent to the A/D modular converter of light source adjustment device; Step S02, the A/D modular converter converts the analog image strength signal to the digital picture strength signal, and then obtains the A/D value, and the A/D modular converter sends to judge module by the A/D value; Step S03, judge module judge that the A/D value whether in any one regional corresponding number range of the number range in a plurality of zones of judge module, if so, carries out step S04, if not, do not do any processing, proceed step S01; Step S04, the initial value of the counter corresponding with the number range in the zone at A/D value place adds 1 automatically, thereby obtains end value; Step S05, whether the counter judged result value of the correspondence of judge module equals the set point of corresponding counter, if not, turns back to step S01, if so, carries out step S06; Step S06, the photoelectrical coupler conducting connected with corresponding counter in the photoelectric coupling module of light source adjustment device, the counter automatic clear that while is corresponding, this photoelectrical coupler generating digital level signal, and digital signal level is sent to the D/A modular converter; Step S07, the digital signal level that the D/A modular converter will receive convert analog voltage signal to and analog voltage signal are directly sent to the electric power driving module of light source adjustment device; Step S08, the brightness that electric power driving module is controlled light source according to analog voltage signal changes.
Further, in step S01, host computer obtains the analog image strength signal and comprises the steps: step S011, host computer receiving target image; Step S013, the intensity of light source analytical system in host computer detects analysis to the intensity of target image, thereby obtains the analog image strength signal.
The present invention has following beneficial effect:
By the present invention, can reach the effect that the light source of Perambulated inspection system can change because of the variation of extraneous natural environment light.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
The accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the structural representation of the Perambulated inspection system of the preferred embodiment of the present invention;
Fig. 2 is the structural representation of the light source adjustment device of the preferred embodiment of the present invention;
Fig. 3 is the method flow diagram that the light source of the using light source adjusting device realization of the preferred embodiment of the present invention is regulated; And
Fig. 4 is the structural representation of the external trigger module of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, Perambulated inspection system comprises installing rack 8, and a plurality of light sources 1 and a plurality of camera 3 that are positioned at object 9 tops are installed on installing rack 8 symmetrically.Light source 1 and camera 3 all are connected with host computer 7.In the process that installing rack 8 moves along object 9 with certain speed, the luminous irradiation object 9 of light source 1; 3 pairs of objects of camera 9 carry out the shooting of image, thereby obtain target image.Afterwards, camera 3 sends to host computer 7 by target image, and by the image processing system in host computer 7, the target image of receiving is carried out to analyzing and processing.
In other embodiments, do not need installing rack 8, but light source 1 and camera 3 are installed on to the bottom of locomotive symmetrically, and make locomotive along object 9 operations.
Preferably, in the present embodiment, the target image that camera 3 absorbs can first be stored in data collecting card 5, and data collecting card 5 is delivered to target image host computer 7 again and carries out analyzing and processing.
Perambulated inspection system is in the process of operation, and extraneous natural environment light is always changing.For avoiding the impact of natural environment light on object 9 testings, require light source 1 brightness high, good uniformity, good stability.In order to improve the whole Perambulated inspection system adaptability of natural environment light to external world, for different measurement period (as day or night) and different measurement location (as tunnel, the complex conditions such as Plain), the brightness of light source 1 is to regulate in the whole service process.The brightness of light source 1 has affected the accuracy of image processing system to target image identification in the shooting quality of target image and host computer 7.Therefore, in present embodiment, utilize light source adjustment device to regulate light source 1.
Light source adjustment device comprises host computer 7, the electric power driving module 4 of above-mentioned receiving target image and the adjuster 2 be connected with host computer 7.
Please in conjunction with reference Fig. 2, adjuster 2 comprises a control board 21, and control board 21 comprises A/D modular converter 211, judge module 213, counting module 215, photoelectric coupling module 217 and the D/A modular converter 219 connected successively.A/D modular converter 211 is connected with judge module 213 with host computer 7 respectively, A/D modular converter 211 is be used to accepting host computer 7 signals, and the signal that host computer 7 passes over converted to after the signal of judge module 213 identifications and be delivered to judge module 213 and judge.Judge module 213 is provided with the number range in a plurality of zones.Counting module 215 comprises a plurality of counters.Each counter all is connected with judge module 213, and makes the corresponding counter of each regional number range in judge module 213.The initial value of each counter is zero, and each counter is provided with set point.Photoelectric coupling module 217 comprises a plurality of photoelectrical couplers that connect with corresponding counter respectively, and each photoelectrical coupler all connects D/A modular converter 219.D/A modular converter 219 is connected with electric power driving module 4, and electric power driving module 4 is controlled the brightness regulation of light source 1 according to the signal of D/A modular converter.
Please in conjunction with reference Fig. 3, light source adjustment device of the present invention is as follows to the detailed process that light source 1 carries out brightness regulation:
Step S01, host computer 7 receives the target image that camera 3 is taken, and the intensity of light source analytical system in host computer 7 detects analysis to the intensity of target image, thereby obtains the analog image strength signal.Host computer 7 sends to the analog image strength signal A/D modular converter 211 of light source adjustment device.
Step S02, A/D modular converter 211 converts the analog image strength signal to the digital picture strength signal, and then obtains the A/D value, and A/D modular converter 211 sends to judge module 213 by the A/D value.
Step S03, judge module 213 judge that the A/D value whether in arbitrary regional number range of the number range in a plurality of zones of judge module 213, if so, carries out step S04, if not, do not do any processing.
Step S04, the initial value of the counter corresponding with the regional number range at A/D value place adds 1 automatically, thereby obtains end value.
Step S05, whether the counter judged result value of the above-mentioned correspondence of judge module 213 equals the set point of this correspondence counter, if not, turns back to step S01, if so, carries out step S06.
Step S06, the photoelectrical coupler conducting that in the photoelectric coupling module 217 of light source adjustment device, counter corresponding to this connects, simultaneously should correspondence counter automatic clear, this photoelectrical coupler generating digital level signal, and digital signal level is sent to D/A modular converter 219.
Step S07, the digital signal level that D/A modular converter 219 will receive convert analog voltage signal to and analog voltage signal are directly sent to the electric power driving module 4 of light source adjustment device.
Step S08, the brightness that electric power driving module 4 is controlled light source 1 according to analog voltage signal changes.
Preferably, in present embodiment, the present invention has carried out brightness regulation by light source adjustment device three times to light source 1, and after regulating each time, that controls light source 1 correspondence sends first order intensity light, second level intensity light and third level intensity light.The concise and to the point process that light source adjustment device adjusting light source 1 successively sends first order intensity light, second level intensity light and third level intensity light is asked for an interview as follows:
In the process of Perambulated inspection system operation, light source adjustment device adopts above-mentioned steps S01 to step S08, to carry out the adjusting of first order intensity light to light source 1, after this, if the ambient light of extraneous nature is still changing, light source adjustment device is further regulated light source 1, be that light source adjustment device repeats the step of above-mentioned steps S01 to step S08 again, regulate light source 1 and send second level intensity light.In light source adjustment device adjusting light source 1 sent the process of second level intensity light, light source 1 was still by first order intensity target illuminated thing 9.Light source adjustment device is after the adjusting that completes second level intensity light, if the ambient light of extraneous nature is still changing, light source adjustment device repeats the step of above-mentioned steps S01 to step S08 again, regulates light source 1 and sends third level intensity light.In light source adjustment device adjusting light source 1 sent the process of third level intensity light, light source 1 was still by second level intensity target illuminated thing 9.
In other embodiments of the invention, can increase or reduce according to different natural environment light and geographical environment the number of the number range of judge module 213.Simultaneously, the number of the counter that increase or minimizing are corresponding with number range, and the number of the photoelectric coupling module 217 that is connected with counter of increase or minimizing.Therefore, light source adjustment device is not limited in three grades of adjustings of above-described embodiment to the adjusting rank of the intensity of light source 1, but can carry out according to different external condition the setting of different brackets.
In order to obtain further high-quality target image, need to carry out Synchronization Control to the line scan rate of camera 3 and the speed of service of installing rack 8.Because in the process of object 9 operations, its speed is non-homogeneous constant at installing rack 8.Installing rack 8 speeds of service inhomogeneous gathers target images to camera 3 and brings impact, will cause the difference of detection resolution on the two-dimensional directional of each machine machine 3, finally can have influence on the accuracy of detection of Perambulated inspection system.Therefore, for the line scan rate that can regulate camera 3 according to the change information of the movement velocity of installing rack 8, can control by external trigger module 6 line scan rate of camera 3.
Please in conjunction with referring to Fig. 4, external trigger module 6 comprises a tachogenerator 61, photoelectric encoder 63 and synchronous trigger circuit plate 65.The input of photoelectric encoder 63 is connected on tachogenerator 61.The output of photoelectric encoder 63 is connected on synchronous trigger circuit plate 65.Each camera 3 all is connected to the synchronous trigger circuit plate 65 of external trigger module 6.In the process of object 9 operations, tachogenerator 61 gathers the speed of service of installing rack 8, and the speed of service that will collect sends to photoelectric encoder 63 at installing rack 8.Photoelectric encoder 63 produces the different TTL square wave of frequency according to the different speeds of service, and the TTL square wave is sent to synchronous trigger circuit plate 65.Synchronous trigger circuit plate 65 is converted to LVDS or the RS232 signal triggering signal as camera 3 using the TTL square wave, and then regulates camera 3 and gather target image with the line scan rate corresponding with triggering signal.External trigger module 6, according to the movement velocity of installing rack 8, is regulated the line scan rate of camera 3, camera 3 can be taken and obtain high-quality target image.
In the present invention, camera 3 preferably adopts the CCD camera, more preferably adopts the linear CCD camera.Object 9 can be track, can be also other any object detected that needs.Target image can be orbital elements image (as: rail, railway ballast, the images such as fastener and sleeper).
While utilizing Perambulated inspection system of the present invention to detect object 9, comprise following several step:
The first step: Perambulated inspection system and object 9 produce relative motion, and the light source 1 of Perambulated inspection system irradiates object 9, the image of camera 3 picked-up objects 9, thus obtain target image.Preferably, when carrying out this first step, the light source adjustment device of Perambulated inspection system is regulated the brightness of light source 1 simultaneously, and process that light source adjustment device is regulated light source 1 as above step S01 is set forth to step S08, does not repeat them here.More preferably, when carrying out this first step, the external trigger module 6 of Perambulated inspection system sends triggering signal simultaneously to camera 3, and camera 3 gathers target image with the line scan rate corresponding with triggering signal.
In other execution mode of the present invention, when carrying out the first step, light source adjustment device can be regulated the brightness of light source 1 simultaneously, and still, external trigger module 6 can trigger camera 3 with the line scan rate collection target image corresponding with triggering signal during difference.In like manner, when carrying out the first step, external trigger module 6 can trigger simultaneously camera 3 and gather target image with the line scan rate corresponding with triggering signal, still, when light source adjustment device can be different, regulates the brightness of light source 1.
Second step: camera 3 sends to target image the host computer 7 of Perambulated inspection system, and the image processing system of host computer 7 carries out analyzing and processing to target image, and the output analysis result.
In above-mentioned second step, namely the image processing system in host computer 7 in turn includes the following steps to the concrete process that target image carries out analyzing and processing:
The first step, image preliminary treatment: target image is smoothly reached to Denoising disposal, thereby obtain muting target image.
Second step, zone identification: target image is all by rail is regional, sleeper is regional and non-rail zone forms.After the various zones of 7 pairs of muting target images of host computer are identified, by target image be divided into above-mentioned rail zone, sleeper is regional and non-rail zone, and the input picture using each zone as follow-up defects detection.
The 3rd step, defects detection: image processing system detects, analyzes input picture, thereby judges, obtains the concrete zone at defect place and the kind of defect.Preferably, there is different defects in the different target area image, uses different algorithms to detect different area images.To determine which defect each zone specifically exists.Be namely: defect is positioned at the rail zone, the sleeper zone is also non-rail zone; Concrete defect is the scratch of Rail Surface, or crackle.
The 4th step, defect location: the real-time speed that obtains the Perambulated inspection system operation according to the tachogenerator 61 of external trigger module 6, can obtain the range ability of Perambulated inspection system, the information of range ability is one to one with the sequence number of the target image gathered, according to the corresponding relation of range ability and detected defect, can in motion process, appear at the accurate location on object 9 by recording defect.
The 5th step, defect are described and classification: from rail is regional, sleeper is regional and geometric properties corresponding to the detected defect in non-rail zone, utilize different geometric properties defect is described and classifies.Preferably, in the 5th step ground, the defect of the image in different target zone usually shows as various geometric properties.The normal geometric properties used has girth, major axis, minor axis and area etc.As: steel rail defect can be by eccentricity, and the input informations such as density and length-width ratio are to the vectorial input of learning vector quantization (LVQ) neural network recognization.As, tread falls piece according to the LVQ neural network recognization, the key element that adopts area to describe as defect; Crackle returns to the key element that length information is described as defect.As: various abrasive features are carried out to as much as possible, preferably separate, mutual ind description, in order to reflect the characteristics of various defect different aspects, facilitate follow-up identification.
The 6th step, report output: the defect be described in the 5th step and classify is exported as analysis result.Preferably, in the 6th step, the size of the defective locations of the image in different target zone, every width image, each defect and grade and relevant information thereof are printed and gathered by the form of form, can be output as the forms such as Excel form, html web page file or TXT document.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (4)

1. light source adjustment device, it is characterized in that, comprise the host computer (7) of a receiving target image and the adjuster (2) be connected with described host computer (7), described light source adjustment device also comprises electric power driving module (4) and the light source (1) be connected with described electric power driving module (4);
Described adjuster (2) comprises a control board (21), described control board (21) comprises A/D modular converter (211), judge module (213), counting module (215), photoelectric coupling module (217) and the D/A modular converter (219) connected successively, wherein, A/D modular converter (211) is connected with described host computer (7);
Described judge module (213) is provided with the number range in a plurality of zones, described counting module (215) comprises a plurality of counters, each described counter is connected with described judge module (213) respectively, and corresponding each described counter of each described number range, described photoelectric coupling module (217) comprises a plurality of photoelectrical couplers that are connected with each described counter respectively, and each described photoelectrical coupler all connects described D/A modular converter (219);
Described electric power driving module (4) is connected in described D/A modular converter (219), and described electric power driving module (4) is controlled the brightness regulation of described light source (1) according to the signal of described D/A modular converter (219).
2. light source adjustment device according to claim 1, is characterized in that, the initial value of each counter of described counting module (215) is zero, and each described counter is provided with set point.
3. a light source control method, is characterized in that, described light source control method application rights requires the described light source adjustment device of any one in 1 to 2, in turn includes the following steps:
Step S01, the host computer of described light source adjustment device (7) is processed the target image of reception, thereby obtains the analog image strength signal, and the analog image strength signal is sent to the A/D modular converter (211) of described light source adjustment device;
Step S02, described A/D modular converter (211) converts described analog image strength signal to the digital picture strength signal, and then obtains the A/D value, and described A/D modular converter (211) sends to described judge module (213) by described A/D value;
Step S03, described judge module (213) judges that described A/D value is whether in any one regional corresponding number range of the number range in a plurality of zones of described judge module (213), if, carry out step S04, if not, do not do any processing, proceed described step S01;
Step S04, the initial value of the counter corresponding with the number range in the zone at described A/D value place adds 1 automatically, thereby obtains end value;
Step S05, the counter of the described correspondence of described judge module (213) judge whether described end value equals the set point of the counter of described correspondence, if not, turn back to step S01, if so, carry out step S06;
Step S06, the photoelectrical coupler conducting connected with described corresponding counter in the photoelectric coupling module (217) of described light source adjustment device, the counter automatic clear of described correspondence of while, this photoelectrical coupler generating digital level signal, and described digital signal level is sent to D/A modular converter (219);
Step S07, the described digital signal level that described D/A modular converter (219) will receive convert analog voltage signal to and described analog voltage signal are directly sent to the electric power driving module (4) of described light source adjustment device;
Step S08, the brightness that described electric power driving module (4) is controlled described light source (1) according to described analog voltage signal changes.
4. light source control method according to claim 3, is characterized in that, in described step S01, described host computer (7) obtains described analog image strength signal and comprises the steps:
Step S011, described host computer (7) receives described target image;
Step S013, the intensity of light source analytical system in described host computer (7) detects analysis to the intensity of described target image, thereby obtains described analog image strength signal.
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CN108802064A (en) * 2018-07-16 2018-11-13 安徽世林照明股份有限公司 A kind of LED lamp IC design debugging circuit board system and adjustment method
CN112986787A (en) * 2021-05-20 2021-06-18 江西省兆驰光电有限公司 Light-emitting diode testing device

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CN202276507U (en) * 2011-09-20 2012-06-13 株洲时代电子技术有限公司 Light source adjustment device

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