CN101709968A - Adaptive scanning subgrade settlement remote monitoring device and method - Google Patents
Adaptive scanning subgrade settlement remote monitoring device and method Download PDFInfo
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- CN101709968A CN101709968A CN200910243313A CN200910243313A CN101709968A CN 101709968 A CN101709968 A CN 101709968A CN 200910243313 A CN200910243313 A CN 200910243313A CN 200910243313 A CN200910243313 A CN 200910243313A CN 101709968 A CN101709968 A CN 101709968A
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Abstract
The invention relates to an adaptive scanning subgrade settlement remote monitoring device and an adaptive scanning subgrade settlement remote monitoring method, which belong to the field of optical and geometrical position measurement. The device comprises a settlement monitoring pile, light sources (1), a fixed observation pile (5), a position measurement unit (2) and an electric rotating stage (3). In the method, a plurality of light sources comprising a first point light source (103) and a second point light source (104) are adopted; and the method comprises the following steps: imaging the first and second point light sources at the position measurement unit; calculating imaging magnification according to a distance between image points; calculating subgrade settlement according to the imaging magnification and the displacement of the image points; and measuring the subgrade settlement of a plurality of points to be measured in a way that the electric rotating stage 3 drives the light source position measurement unit to rotate and be orderly aligned with the light sources. The device and the method accurately measure the imaging magnification, improve measurement accuracy, can perform measurement for 24 hours per day because the light intensity of the light sources is adjustable, and reduce equipment cost because one detector can measure a plurality of targets and a uniform reference is established.
Description
Technical field
The invention belongs to optical measurement and geometric position field of measuring technique, relate to a kind of adaptive scanning subgrade settlement remote monitoring device and method.
Background technology
Subgrade settlement is measured in rail safety detects and monitors and is played an important role.Be used for measurement road subgrade settlement observation device at present and mainly contain water tumbler sedimentometer, settlement plate measurement mechanism, section sedimentometer, pvc pipe sedimentometer, magnet ring sedimentometer.Following three major defects of above prior art ubiquity: first relies on manual measurement or record, and efficiency of measurement is low, and accuracy of detection is low; During the second selection reference point, stability and low cost can not get both; The 3rd measure can not remote monitoring, can not measure automatically.
" a kind of apparatus and method of utilizing the laser remotely measuring subgrade settlement " (see application number: 200810222753.1).The sedimentation that this invention uses laser to measure roadbed automatically, and will measure numerical value and be sent to CPU (central processing unit) by cordless communication network, thereby realization is to the remote monitoring of observation point subgrade settlement.But still there are following three problems in these apparatus and method:
Based on image-forming principle, need before the measurement manually to demarcate the imaging multiplying power, and in the practice of construction process, accurately measure the imaging object distance to acquire a certain degree of difficulty, there are certain deviation in imaging multiplying power that obtains and actual imaging multiplying power, influence measurement result;
Target and measurement mechanism are measured one to one, and it is higher to measure cost;
The intensity of light source is non-adjustable, the dynamic range of photoelectric device is less, is difficult to eliminate parasitic light, is restricting the scope of application of this device.
Summary of the invention
The objective of the invention is, the defective at existing in present existing subgrade settlement measurement mechanism and the method proposes a kind of adaptive scanning subgrade settlement remote monitoring device and method.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of adaptive scanning subgrade settlement remote monitoring device comprises: light source, location measurement unit, sedimentation detect stake and fixing observation stake.
Location measurement unit and fixing the observation between the stake are established electric rotary table; Described electric rotary table comprises turntable face, support, rotation axis, worm gearing, shaft coupling, stepper motor; Described support is installed in fixing the observation in the stake, and described stepper motor is installed on the described support; Described worm gearing is connected with stepper motor by shaft coupling; Described turntable face is fixedlyed connected with described rotation axis; Worm gearing and rotation axis engagement; Described rotation axis drives the rotation of turntable face, and the described light source position measuring unit that is installed on the turntable face is followed the rotation of turntable face;
Described light source comprises light source cell and control module, and described control module is used to regulate the light intensity of described light source cell;
Described light source cell comprises first pointolite, second pointolite, and described first pointolite, second pointolite are separately fixed on the fixed head in first hole and second hole of space apart from d;
First hole and second hole apart from d between the resolution L1 and measurement range L2 of described subgrade settlement measuring unit; L1=l1*s1/s2; L2=l2*s1/s2; L1, l2 are respectively described photoelectric position detector resolution and measurement range; S1 is a system imaging light path object distance; S2 is a system imaging light path image distance; S1, s2 are accurate to the mm magnitude;
Described light source cell comprises following four kinds of composition modes:
One, in described first hole and second hole, respectively places and fixes first single color LED, second single color LED; Described two single color LEDs all are connected with control module; Two single color LEDs form first pointolite and second pointolite;
Two, be the base at the line with described first hole and position, second hole, the isosceles triangle drift angle place of formation is provided with a super bright single color LED; Described super bright single color LED is connected with control module; The light that described super bright single color LED sends passes from two holes on the fixed head, forms described first pointolite, second pointolite;
Three, comprise fixed head, the semiconductor laser of the first magnetic tape trailer fibre, fiber optic splitter; Fiber optic splitter comprises an output terminal and two input ends; The control end of the semiconductor laser of the described first magnetic tape trailer fibre is connected with described control module, the first output tail optical fiber of the semiconductor laser of the described first magnetic tape trailer fibre is connected with the input end of described fiber optic splitter, two output terminals of described fiber optic splitter are connected with an end of first output optical fibre, second output optical fibre respectively, the other end of described first output optical fibre, second output optical fibre is separately fixed in described first hole and second hole, forms described first pointolite, second pointolite;
Four, comprise the semiconductor laser of fixed head, the second magnetic tape trailer fibre, the semiconductor laser of the 3rd magnetic tape trailer fibre; The control end of the semiconductor laser of the described second magnetic tape trailer fibre and the semiconductor laser of the 3rd magnetic tape trailer fibre is connected with control module, the output tail optical fiber of the semiconductor laser of the semiconductor laser of the described second magnetic tape trailer fibre and the 3rd magnetic tape trailer fibre is separately fixed in described first hole and second hole, forms described first pointolite, second pointolite.
Described photoelectric position detector adopts linear charge-coupled array or Position-Sensitive Detector.
Described control and signal processing circuit are controlled described photoelectric position detector and described electric rotary table simultaneously.
Based on a kind of adaptive scanning subgrade settlement remote monitoring method of linear charge-coupled array, it is characterized in that described method comprises the following steps: as above-mentioned a kind of adaptive scanning subgrade settlement remote monitoring device of photoelectric position detector
Step 4 according to the integral time of background stray light image adjustment photoelectric position detector, makes background stray light light intensity average gray value be not more than 1/2nd of photoelectric position detector maximum gradation value, the background stray light image after integral time regulated in record;
Step 8, electric rotary table rotates to first initial angle, second initial angle, the 3rd initial angle, the 4th initial angle successively, because detecting stake, sedimentation occurs simultaneously laterally moving with subgrade settlement, cause that the light source levels direction that is fixed in the sedimentation detection stake produces micrometric displacement, so electric rotary table is finely tuned near first to fourth initial angle, aim at first light source, secondary light source, the 3rd light source, the 4th light source of lighting successively, measure in real time, during measurement, repeating step three obtains the real time position of each pointolite picture point of first to fourth light source to step 6; Subtract each other with corresponding initial position by real time position, obtain picture side's sedimentation value, calculate the imaging multiplying power by the distance between the first pointolite picture point and the second pointolite picture point with apart from d, will multiply each other as square sedimentation value and imaging multiplying power obtains the subgrade settlement measured value at place, measured point.
The position-based sensing detector is characterized in that as a kind of adaptive scanning subgrade settlement remote monitoring method of above-mentioned a kind of adaptive scanning subgrade settlement remote monitoring device of photoelectric position detector described method comprises the following steps:
Step 4 is lighted another pointolite in first light source, and repeating step three obtains corresponding picture point initial position;
Effect of the present invention is, adopts the certain point light source groups of distance as measured target, obtains accurate imaging multiplying power during measurement easily, is reduced to the influence of picture multiplying power measuring error to the final settlement measurement result; Adopt the light intensity tunable light source as measured target, but the Position-Sensitive Detector that adopts the linear charge-coupled array of adjustable integral time or demodulation modulated light source signal is as photoelectric position detector, avoid the interference of extraneous background stray light, can realize round-the-clock measurement; By scan mode, realize the measurement of a plurality of targets of detectors, be easy to set up unified measuring basis, the reduction equipment cost.
Description of drawings
Fig. 1 is a kind of composition synoptic diagram of adaptive scanning subgrade settlement remote monitoring device.
Fig. 2 is that the light source cell master looks synoptic diagram.
Fig. 3 (a) is that synoptic diagram is looked on the right side that four kinds of light source cells are formed to Fig. 3 (d).
Fig. 4 is a kind of adaptive scanning subgrade settlement remote monitoring method scanning synoptic diagram.
Among the figure:
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Embodiment one:
As shown in Figure 1, a kind of adaptive scanning subgrade settlement remote monitoring device comprises: light source, location measurement unit, sedimentation detect stake and fixing observation stake.
The subgrade settlement measuring unit comprises: light source 1, location measurement unit 2, electric rotary table 3, sedimentation detect stake and fixing observation stake 5.
Electric rotary table 3 comprises turntable face 301, support 302, rotation axis 303, worm gearing 304, shaft coupling 305, stepper motor 306.Support 302 is installed in fixing the observation in the stake 5, and stepper motor 306 is installed on the support 302; Worm gearing 304 is connected with stepper motor 302 by shaft coupling 305; Turntable face 301 is fixedlyed connected with rotation axis 303; Worm gearing 304 and rotation axis 303 engagements; Rotation axis 303 drives 301 rotations of turntable face, and the light source position measuring unit 2 that is installed on the turntable face is followed 301 rotations of turntable face.
Control is controlled photoelectric position detector 203 and electric rotary table 3 simultaneously with signal processing circuit 204.
Sedimentation detects stake and detects a stake measuring staff 401, sedimentation by sedimentation and detect a stake base plate 402 and forms, sedimentation detect a stake base plate 402 bury underground with roadbed in, drive sedimentation and detect stake measuring staff 401 and light source 1 and the synchronous sedimentation of roadbed fixed thereon.
Next introduce and utilize above-mentioned steel rail parameter automatic measurement device, realize rail length travel method for automatic measurement, photoelectric position detector adopts linear charge-coupled array, and its step is as follows:
Step 3: electric rotary table 3 rotates to first initial angle, aims at first light source 11, location measurement unit 2 record background stray light images;
Step 4: according to the integral time of background stray light image adjustment photoelectric position detector 203, make background stray light light intensity average gray value be not more than 1/2nd of photoelectric position detector 203 maximum gradation value, the background stray light image after integral time regulated in record;
Step 8, electric rotary table 3 rotates to first initial angle successively, second initial angle, the 3rd initial angle, the 4th initial angle, finely tune, aim at first light source of lighting 11 successively, secondary light source 12, the 3rd light source 13, the 4th light source 14, measure in real time, during measurement, repeating step three is to step 6, obtain the real time position of first to fourth light source, first pointolite 103 and second pointolite, 104 picture points, subtract each other with corresponding initial position by real time position, obtain picture side's sedimentation value, calculate the imaging multiplying power by the distance between first pointolite, 103 picture points and second pointolite, 104 picture points with apart from d, will multiply each other as square sedimentation value and imaging multiplying power obtains the subgrade settlement measured value at place, measured point.
Embodiment two:
The difference of the composition of a kind of adaptive scanning subgrade settlement remote monitoring device of present embodiment and embodiment one is, the light source cell 102 of present embodiment is made up of with fixed head 105 a super bright single color LED 121, shown in Fig. 3 (b), the hole of two aperture 1mm is arranged on the fixed head; It is that 20mm, height are the isosceles triangle of 40mm that super bright single color LED and two holes constitute the base.
The rail length travel method for automatic measurement of present embodiment is identical with embodiment one.
Embodiment three:
The difference of the composition of a kind of adaptive scanning subgrade settlement remote monitoring device of present embodiment and embodiment one is, the light source cell 102 of present embodiment comprises semiconductor laser 131, fiber optic splitter 133, the fixed head 105 of the first magnetic tape trailer fibre, shown in Fig. 3 (c); The control end of the semiconductor laser 131 of the first magnetic tape trailer fibre is connected with control module 102, the output tail optical fiber 132 of the semiconductor laser 131 of the first magnetic tape trailer fibre is connected with the input end of fiber optic splitter 133, two output terminals of fiber optic splitter 133 are connected with an end of first output optical fibre 134, second output optical fibre 135 respectively, and the other end of first output optical fibre 134, second output optical fibre 135 is separately fixed on the fixed head 105 in two holes of 20mm.
The rail length travel method for automatic measurement of present embodiment is identical with embodiment one.
Embodiment four:
The difference of the composition of a kind of adaptive scanning subgrade settlement remote monitoring device of present embodiment and embodiment one is, the light source cell 102 of present embodiment comprises the semiconductor laser 141 of fixed head 105, the second magnetic tape trailer fibre, the semiconductor laser 142 of the 3rd magnetic tape trailer fibre, shown in Fig. 3 (d); The control end of the semiconductor laser 141 of the second magnetic tape trailer fibre and the semiconductor laser 142 of the 3rd magnetic tape trailer fibre is connected with control module 101, and second, third output tail optical fiber 143,144 of the semiconductor laser 141 of the first magnetic tape trailer fibre and the semiconductor laser 142 of the second magnetic tape trailer fibre is separately fixed in two holes of 20mm.
The rail length travel method for automatic measurement of present embodiment is identical with embodiment one.
Embodiment five
The difference of the composition of a kind of adaptive scanning subgrade settlement remote monitoring device of present embodiment and embodiment one is, the photoelectric position detector 203 of present embodiment adopts Position-Sensitive Detector, and control module 101 makes first, second pointolite 103,104 add modulation signal.
Rail length travel method for automatic measurement based on above-mentioned steel rail parameter automatic measurement device comprises the following steps:
Step 4 to second pointolite, 104 repeating steps three in the light source, obtains corresponding picture point initial position;
Embodiment six:
The difference of the composition of a kind of adaptive scanning subgrade settlement remote monitoring device of present embodiment and embodiment five is, the composition mode that the light source cell 102 of present embodiment adopts among the embodiment four.
The rail length travel method for automatic measurement of present embodiment is identical with embodiment five.
Claims (9)
1. an adaptive scanning subgrade settlement remote monitoring device comprises: light source, location measurement unit, sedimentation detection stake and fixing observation stake;
It is characterized in that: location measurement unit (2) and fixing the observation between the stake (5) are established electric rotary table (3);
Electric rotary table (3) comprises turntable face (301), support (302), rotation axis (303), worm gearing (304), shaft coupling (305), stepper motor (306); Support (302) is installed in fixing the observation in the stake (5); Stepper motor (306) is installed on the support (302); Worm gearing (304) is connected with stepper motor (306) by shaft coupling (305); Turntable face (301) is fixedlyed connected with rotation axis (303); Worm gearing (304) and rotation axis (303) engagement; Rotation axis (303) drives turntable face (301) rotation, and the location measurement unit (2) that is installed on the turntable face (301) is followed turntable face (301) rotation;
Light source (1) comprises light source cell (102) and control module (101);
Light source cell (102) comprises first pointolite (103), second pointolite (104), and first pointolite (103), second pointolite (104) are separately fixed at fixed head (105) and go up in first hole (106) and second hole (107) of space apart from d;
In first hole (106) and second hole (107) apart from d between the resolution L1 and measurement range L2 of described subgrade settlement measuring unit; L1=l1*s1/s2; L2=l2*s1/s2; L1 is the resolution of photoelectric position detector (203); L2 is the measurement range of photoelectric position detector (203); S1 is a system imaging light path object distance; S2 is a system imaging light path image distance; S1, s2 are accurate to the mm magnitude.
2. a kind of adaptive scanning subgrade settlement remote monitoring device according to claim 1 is characterized in that: light source cell (102) is to place and fix first single color LED (111), second single color LED (112) in first hole (106) and second hole (107) respectively; First, second single color LED (111), (112) all are connected with control module (101); First single color LED (111), second single color LED (112) form first pointolite (103) and second pointolite (104).
3. adaptive scanning subgrade settlement remote monitoring device according to claim 1, it is characterized in that: light source cell (102) is to be the base at the line with first hole (106) and position, second hole (107), and the isosceles triangle drift angle place of formation is provided with a super bright single color LED (121); Super bright single color LED (121) is connected with control module (101); The light that super bright single color LED (121) sends passes from first hole (106) and second hole (107) on the fixed head (105), forms first pointolite (103), second pointolite (104).
4. adaptive scanning subgrade settlement remote monitoring device according to claim 1 is characterized in that: light source cell (102) comprises semiconductor laser (131), the fiber optic splitter (133) of fixed head (105), the first magnetic tape trailer fibre; The control end of the semiconductor laser of the first magnetic tape trailer fibre (131) is connected with control module (101), the first output tail optical fiber (132) of the semiconductor laser of the first magnetic tape trailer fibre (131) is connected with the input end of fiber optic splitter (133), two output terminals of fiber optic splitter (133) respectively with first output optical fibre (134), one end of second output optical fibre (135) connects, first output optical fibre (134), the other end of second output optical fibre (135) is separately fixed in first hole (106) and second hole (107), forms first pointolite (103), second pointolite (104).
5. a kind of adaptive scanning subgrade settlement remote monitoring device according to claim 1 is characterized in that: light source cell (102) comprises the semiconductor laser (141) of fixed head (105), the second magnetic tape trailer fibre, the semiconductor laser (142) of the 3rd magnetic tape trailer fibre; The control end of the semiconductor laser of the second magnetic tape trailer fibre (141) is connected with control module (101), and the control end of the semiconductor laser of the 3rd magnetic tape trailer fibre (142) is connected with control module (101); The semiconductor laser of the second magnetic tape trailer fibre (141) output terminal is connected with an end of the second output tail optical fiber (143), and the semiconductor laser of the 3rd magnetic tape trailer fibre (142) output terminal is connected with an end of the 3rd output tail optical fiber (144); The other end of the second output tail optical fiber (143) and the 3rd output tail optical fiber (144) is separately fixed in first hole (106) and second hole (107), forms first pointolite (103), second pointolite (104).
6. adaptive scanning subgrade settlement remote monitoring device according to claim 1 is characterized in that: photoelectric position detector (203) adopts linear charge-coupled array.
7. adaptive scanning subgrade settlement remote monitoring device according to claim 1 is characterized in that: photoelectric position detector (203) adopts Position-Sensitive Detector.
8. based on the method for a kind of adaptive scanning subgrade settlement remote monitoring of the described a kind of adaptive scanning subgrade settlement remote monitoring device of claim 6, it is characterized in that said method comprising the steps of:
Step 1 is provided with location measurement unit (2) and first light source (11), secondary light source (12), three light source (13), four light source (14) identical with light source (1) in subgrade settlement observation highway section;
Step 2, light first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source (14), electric rotary table (3) is turned clockwise, make location measurement unit (2) aim at first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source (14) successively, the angle of electric rotary table (3) rotation is designated as first initial angle, second initial angle, the 3rd initial angle, the 4th initial angle respectively, close above four light sources, make electric rotary table (3) get back to initial position;
Step 3, electric rotary table (3) rotates to first initial angle, aims at first light source (11), location measurement unit (2) record background stray light image;
Step 4, according to the integral time of background stray light image adjustment photoelectric position detector (203), make background stray light light intensity average gray value be not more than 1/2nd of photoelectric position detector (203) maximum gradation value, the background stray light image after integral time regulated in record;
Step 5, light first light source (11), the image of location measurement unit (2) recording strip target, image adjustment first light source (11) light intensity according to the band target, make target light intensity maximum gradation value greater than 1/2nd of photoelectric position detector (203) maximum gradation value, the image of band target is closed first light source (11) after location measurement unit (2) the record adjusting light intensity;
Step 6, with the background stray light image subtraction after being with the image of target after the adjusting light intensity and regulating integral time, obtain the background stray light target image, handle removing the background stray light target image, obtain the initial position of (11) two pointolite picture points of first light source with the sub-pix algorithm;
Step 7, electric rotary table (3) rotates to second initial angle, the 3rd initial angle, the 4th initial angle successively, aim at secondary light source (12), the 3rd light source (13), the 4th light source of lighting (14) successively, second to the 4th light source repeating step three is arrived step 6, carry out initial measurement, after finishing second to the 4th light source initial measurement, make electric rotary table (3) get back to initial position, close second to the 4th light source;
Step 8, electric rotary table (3) rotates to first initial angle, second initial angle, the 3rd initial angle, the 4th initial angle successively, finely tune, aim at first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source of lighting (14) successively, measure in real time, during measurement, repeating step three obtains the real time position of first to fourth light source, first pointolite (103) and second pointolite (104) picture point to step 6; Subtract each other with corresponding initial position by real time position, obtain picture side's sedimentation value; Calculate the imaging multiplying power by the distance between first pointolite (103) picture point and second pointolite (104) picture point with apart from d, will multiply each other as square sedimentation value and imaging multiplying power obtains the subgrade settlement measured value at place, measured point.
9. based on the method for a kind of adaptive scanning subgrade settlement remote monitoring of the described a kind of adaptive scanning subgrade settlement remote monitoring device of claim 7, it is characterized in that said method comprising the steps of:
Step 1 is provided with location measurement unit (2) and first light source (11), secondary light source (12), three light source (13), four light source (14) identical with light source (1) in subgrade settlement observation highway section;
Step 2, light first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source (14), electric rotary table (3) is turned clockwise, make location measurement unit (2) aim at first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source (14) successively, the angle of electric rotary table (3) rotation is designated as first initial angle, second initial angle, the 3rd initial angle, the 4th initial angle, close above four light sources, make electric rotary table (3) get back to initial position;
Step 3, electric rotary table (3) rotates to first initial angle, aim at first light source (11), light pointolite (103) or second pointolite (104) in first light source (11), it is modulated, location sensitive detector gained information is carried out demodulation, obtains this pointolite picture point initial position;
Step 4 is lighted another pointolite in first light source (11), and repeating step three obtains corresponding picture point initial position;
Step 5, electric rotary table (3) rotates to second initial angle, the 3rd initial angle, the 4th initial angle successively, aim at secondary light source (12), the 3rd light source (13), the 4th light source of lighting (14) successively respectively, second to the 4th light source repeating step three is arrived step 6, carry out initial measurement, after finishing second to the 4th light source initial measurement, make electric rotary table (3) get back to initial position, close second to the 4th light source;
Step 6, electric rotary table (3) rotates to first initial angle, second initial angle, the 3rd initial angle, the 4th initial angle successively, finely tune, standard first light source (11), secondary light source (12), the 3rd light source (13), the 4th light source (14) to lighting measured in real time successively; During measurement, repeating step three, step 4 obtain the real time position of first to fourth light source, first pointolite (103) and second pointolite (104) picture point; For each light source, selected this light source picture point wherein one or more, subtract each other with the initial position of corresponding point, obtain picture side's sedimentation value; Calculate the imaging multiplying power by the distance between first pointolite (103) picture point and second pointolite (104) picture point with apart from d, will multiply each other as square sedimentation value and imaging multiplying power obtains the subgrade settlement measured value at place, measured point.
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CN101885340A (en) * | 2010-06-28 | 2010-11-17 | 山东申普汽车控制技术有限公司 | Image template matching technology based method and device for measuring railway track displacement |
CN101975566A (en) * | 2010-09-29 | 2011-02-16 | 北京交通大学 | Remote multi-point monitoring system and method for subgrade surface settlement |
CN102519965A (en) * | 2011-12-15 | 2012-06-27 | 南京工程学院 | Online roadbed compactness detection method based on machine vision |
CN107228651A (en) * | 2017-06-12 | 2017-10-03 | 河海大学 | A kind of imbedded fiber the Settlement Observation device and observation procedure |
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CN100588897C (en) * | 2008-09-24 | 2010-02-10 | 北京交通大学 | Apparatus and method for measuring road bed sedimentation from long distance by laser |
CN101476337B (en) * | 2009-01-15 | 2011-01-19 | 北京交通大学 | Automatic monitoring apparatus and method for layered vertical sedimentation and lateral displacement of roadbed |
CN101574973B (en) * | 2009-06-10 | 2011-06-29 | 北京交通大学 | Device, system and method for steel rail parameter automatic measurement |
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CN101885340A (en) * | 2010-06-28 | 2010-11-17 | 山东申普汽车控制技术有限公司 | Image template matching technology based method and device for measuring railway track displacement |
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CN101975566A (en) * | 2010-09-29 | 2011-02-16 | 北京交通大学 | Remote multi-point monitoring system and method for subgrade surface settlement |
CN101975566B (en) * | 2010-09-29 | 2013-06-12 | 北京交通大学 | Remote multi-point monitoring system and method for subgrade surface settlement |
CN102519965A (en) * | 2011-12-15 | 2012-06-27 | 南京工程学院 | Online roadbed compactness detection method based on machine vision |
CN102519965B (en) * | 2011-12-15 | 2014-10-15 | 南京工程学院 | Online roadbed compactness detection method based on machine vision |
CN107228651A (en) * | 2017-06-12 | 2017-10-03 | 河海大学 | A kind of imbedded fiber the Settlement Observation device and observation procedure |
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