CN210530832U - Shield tail clearance measuring device for shield tunneling machine - Google Patents
Shield tail clearance measuring device for shield tunneling machine Download PDFInfo
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- CN210530832U CN210530832U CN201822230526.5U CN201822230526U CN210530832U CN 210530832 U CN210530832 U CN 210530832U CN 201822230526 U CN201822230526 U CN 201822230526U CN 210530832 U CN210530832 U CN 210530832U
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Abstract
本实用新型公开了一种针对盾构机进行盾尾间隙测量装置,所述装置包括摄像机，环形补光机构，防护箱、显示器及图像处理系统；所述防护箱前端底部设置有补光机构，所述补光机构上设置有摄像机，所述防护箱底部连接有千斤顶；所述图像处理系统包括图像采集模块、由图像划分单元、图像过滤单元和间隙计算单元构成的图像数据分析模块和图像输出模块；该装置可以准确地捕捉盾尾间隙的模拟数据，并能精准输出盾尾间隙数据信息，为快速、高效的施工提供有力保障。
The utility model discloses a shield tail clearance measuring device for a shield machine. The device comprises a camera, a ring-shaped supplementary light mechanism, a protective box, a display and an image processing system; the front bottom of the protective box is provided with a supplementary light mechanism, The light-filling mechanism is provided with a camera, and the bottom of the protective box is connected with a jack; the image processing system includes an image acquisition module, an image data analysis module composed of an image division unit, an image filtering unit and a gap calculation unit, and an image output. Module; the device can accurately capture the simulation data of the shield tail gap, and can accurately output the shield tail gap data information, providing a strong guarantee for fast and efficient construction.
Description
Technical Field
The utility model is suitable for a shield constructs method construction field, especially relates to a carry out shield tail clearance measuring device to shield constructs machine.
Background
With the development of urban construction in China, many large and medium-sized cities in China are basically built or subway facilities are built, and the shield tunneling machine plays an important role in the construction of urban subways. In the shield construction process, due to the reason that the curvature change of the tunneling route of the shield machine and the extension length of the thrust cylinder cannot be kept consistent constantly, the space between the inner wall of the shield tail of the shield machine and the outer diameter of the duct piece is changed, and the space is the gap of the shield tail. In the construction, when the size of the shield tail clearance exceeds the allowable change value, the negative influence on the construction can be generated: on one hand, the shield tail structure of the shield machine can be damaged due to the fact that the duct piece extrudes the shield tail, and on the other hand, the whole project can be irreparably damaged due to deviation of the construction tunneling axis. In the current shield construction process, the most used method is manual measurement of the shield tail clearance, namely, field workers use tools such as a ruler and the like to manually measure the shield tail clearance. The manual measurement method is low in efficiency and large in error, and certain potential safety hazards are caused to workers under severe construction conditions.
Researchers have proposed a method for obtaining the shield tail clearance by utilizing a CCD camera to shoot a shield tail clearance picture and then carrying out related image processing, and the method has the defects that the shield tail clearance picture with good quality is not easy to shoot, because field workers are required to manually adjust the focal length of the camera in specific construction, and the workers do not have a unified standard for high-quality pictures; in addition, the method has more calibration points, increases the calibration difficulty and errors, and lacks a stable and simple calibration reference.
SUMMERY OF THE UTILITY MODEL
Technical problem to prior art exists, the utility model provides a carry out shield tail clearance measuring device to shield constructs machine, the device can accurately catch the analog data in shield tail clearance to can accurate output shield tail clearance data information, provide the powerful guarantee for quick, efficient construction.
In order to solve the problems existing in the prior art, the utility model provides a technical scheme is:
a shield tail clearance measuring device for a shield tunneling machine is composed of a device body, wherein the device body comprises a camera, an annular light supplementing mechanism, a protective box, a display and an image processing system; a light supplementing mechanism is arranged at the bottom of the front end of the protective box, a camera is arranged on the light supplementing mechanism, and a jack is connected to the bottom of the protective box; the image processing system comprises an image acquisition module, an image data analysis module and an image output module, wherein the image data analysis module consists of an image dividing unit, an image filtering unit and a gap calculation unit;
the image acquisition module converts an analog signal in the camera into a binary data signal;
the image data analysis module receives a binary data signal and inputs the binary data signal into the image dividing unit;
the image dividing unit distinguishes binary data signals into a segment data signal and a shield tail data signal;
the image filtering unit is used for respectively carrying out data processing on the segment data signal and the shield tail data signal;
the gap calculation unit determines a correlation coefficient value K according to the segment data signal by the following formula (1):
K＝H/N
wherein H represents the numerical value of the thickness of the pipe piece; n represents the number N of pixels between the upper edge and the lower edge of the duct piece;
the clearance calculation unit determines a shield tail clearance value L according to the shield tail data signal through the following formula (2):
L＝K*M
wherein M represents the number M of pixels between the upper edge and the lower edge of the shield tail gap;
and the image output module outputs a shield tail clearance value L signal to a display.
The light supplementing mechanism is composed of an annular bracket, and lamp sources are arranged on the bracket at equal intervals.
The camera is provided with a zoom lens.
Compared with the prior art, the utility model has the advantages of:
1. the utility model discloses an annular light filling mechanism carries out wide field of vision light filling for the camera for even if the camera also can shoot the image between shield tail and the section of jurisdiction under abominable environment, establish the basis for obtaining shield tail clearance data accurately.
2. The utility model discloses an adopt jack and CCD to zoom camera ingenious combination and can realize that different distances zooms automatically and catch shield tail interval image.
3. The utility model discloses with the software environment cooperation of complete hardware equipment and independent research and development, and then to the accurate value that provides the tail clearance of job site, realize the real-time supervision in shield tail clearance, guarantee the high-quality completion of construction task.
Drawings
Fig. 1 is a schematic view of the working state of the present invention.
Fig. 2 is a schematic structural view of the middle light supplement mechanism of the present invention.
Fig. 3 is a schematic diagram of the image processing system of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to fig. 1.
As shown in fig. 1, the utility model relates to a shield tail clearance measuring device for a shield machine, which comprises a device body, wherein the device body comprises a camera 101, an annular light supplementing mechanism 102, a protective box 103, a display 104 and an image processing system 201; the bottom of the front end of the protective box 103 is provided with a light supplementing mechanism 102, a camera 101 is arranged on the light supplementing mechanism 102, and the bottom of the protective box 103 is connected with a jack 105. As shown in fig. 2, the light supplement mechanism 102 is formed by an annular bracket, and the bracket is provided with light sources 106 at equal intervals, and the light sources can be LEDs. The camera 101 is provided with a zoom lens 107. The utility model discloses a middle and middle protective box is a communication distribution box for controlling communication and power supply by 103, a computer 201 for image processing and data display, an annular light source 102 and a CCD zoom camera 101 for illumination; the annular light supplementing light source 102 is fixed at the bottom of the front end of the protective box 103, the CCD zoom camera 101 is fixed in the middle of the annular light supplementing light source 102, power supply wires of the CCD zoom camera 101 and the computer 201 and communication wires between the power supply wires are connected to the communication distribution box 103, the protective box 103 is fixed at the position of a bottom plate (boot plate) of the pushing jack 105, and when the protective box 103 is fixed, no shielding object exists between the CCD zoom camera 101 and the annular light source 103 and between the shield tail 301. The utility model discloses CCD zooms camera 101 and designs annular light filling lamp design around, can make the field of vision illumination even, and the effect of shooing is more clear. In the traditional method, a fluorescent lamp on a construction site is used or two illumination light sources are additionally arranged near a camera, so that the illumination effect is poor, the illumination is uneven, and the visual field is influenced. The identification of the shield tail gap can be influenced by the shadow of other devices of the shield tunneling machine irradiated by non-uniform light.
As shown in fig. 3, the image processing system 201 includes an image acquisition module 202, an image data analysis module 203, which is composed of an image dividing unit 204, an image filtering unit 205, and a gap calculation unit 206; the image acquisition module 202 converts the analog signal in the camera 101 into a binary data signal; the image data analysis module 203 receives a binary data signal and inputs the binary data signal into the image dividing unit 204; the image dividing unit 204 distinguishes the binary data signals into a segment data signal and a shield tail data signal; the image filtering unit 205 performs data processing on the slice data signal and the shield tail data signal respectively; the gap calculation unit 206 determines a correlation coefficient value K from the segment data signal by the following formula (1):
K＝H/N
wherein H represents the numerical value of the thickness of the pipe piece; n represents the number N of pixels between the upper edge and the lower edge of the duct piece;
the clearance calculation unit 206 determines a shield tail clearance value L according to the shield tail data signal by the following formula (2):
L＝K*M
wherein M represents the number M of pixels between the upper edge and the lower edge of the shield tail gap;
the image output module 207 outputs the shield tail clearance value L signal to the display 104.
The image processing system 201 of the shield tail photo and the specific calculation method of the shield tail clearance are as follows:
(1) a CCD zoom camera 101 in a protective box 102 shoots a shield tail photo;
(2) the image data analysis module 203 performs binarization processing on the original image, and image binarization (ImageBinarization) is to perform binarization on the imagePixelOf dotsGrey scale valueSet to 0 or 255, i.e. the process of rendering the whole image in a noticeable black and white effect.
(3) The image dividing unit 204 distinguishes a segment region of interest (ROI) and a shield tail gap region of interest (ROI) by using an image segmentation algorithm and a counter; roi (region of interest). In machine vision and image processing, a region to be processed is outlined from a processed image in the form of a box, a circle, an ellipse, an irregular polygon, or the like, and is called a region of interest.
The image filtering unit 204 respectively performs Blob analysis on the two regions after performing morphological processing such as corrosion and expansion on the two ROIs, wherein the Blob analysis mainly comprises the steps of separating the segments and gaps from the photo background, drying, analyzing connectivity and the like; blob Analysis (Blob Analysis) is an Analysis of the connected components of the same pixel in an image, called Blob. The main application of morphological processing is to extract image components meaningful for expressing and describing the shape of a region from an image, so that the subsequent recognition work can grasp the most essential shape features (most distinguishing capability), such as boundaries, connected regions and the like, of a target object. The most basic morphological operations are: expansion (dilation) and corrosion (erosion), the main uses of expansion and corrosion: noise is eliminated; segmenting independent image elements and connecting adjacent elements in the image; searching for an obvious maximum value or minimum value area in the image; solving the gradient of the image; the erosion and swelling are for portions where the pixel value is large, i.e., highlight white portions instead of black portions; the expansion is that the high-brightness part in the image is expanded, the field is expanded, and the effect image has a high-brightness area larger than that of the original image; the corrosion is that the highlight part in the image is corroded, the field is reduced, and the effect image has a highlight area smaller than that of the original image;
(4) the gap calculating unit 206 calculates the number N of pixels between the upper and lower edges of the segment (i.e., the segment thickness value) by using the edge detection algorithm, using the segment thickness value as a calibration reference, and the segment thickness H is known, so that the relation coefficient between the actual length and the pixel point is obtained: k is H/N, and the K is used as a set scale; and obtaining the number M of pixels between the upper edge and the lower edge of the shield tail clearance collected by the camera by using an edge detection algorithm again, and calculating an actual shield tail clearance value L (K) M by using a set scale.
In the actual shield construction process, the control room operator judges whether the construction deviates from the established construction route according to the shield tail clearance value fed back by the display 20 in real time, and makes real-time adjustment to achieve the best construction effect.
The utility model discloses implementation process:
in the shield construction process, a shield tail clearance value can be detected at any time, the annular light sources 102 distributed around the CCD zoom camera 101 can provide illumination for the shield tail of the shield machine, and the CCD zoom camera 101 shoots a picture containing the shield tail 301 and the duct piece 302; because the thickness of the duct piece 302 used in one shield construction is uniform, the duct piece thickness value is adopted as a calibration to be used as a basis for calculating the shield tail clearance; after shooting a shield tail photo by the CCD zoom camera 101, transmitting the shield tail photo to the image processing system 201 through a communication data cable, and processing the photo by the image processing system 201 through related modules of the image processing system to obtain a value of a shield tail clearance; communications box 102 may control the powering and communications of the system.
It is only above that the utility model discloses a concrete implementation mode, the technical type talent in the field of belong to can all make corresponding more this and transform. Modifications and changes based on the present invention shall fall into the protection scope of the claims of the present invention.
It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (3)
1. The utility model provides a shield tail clearance measuring device carries out to shield constructs machine comprises the device body, its characterized in that: the device body comprises a camera, an annular light supplementing mechanism, a protective box, a display and an image processing system; a light supplementing mechanism is arranged at the bottom of the front end of the protective box, a camera is arranged on the light supplementing mechanism, and a jack is connected to the bottom of the protective box; the image processing system comprises an image acquisition module, an image data analysis module and an image output module, wherein the image data analysis module consists of an image dividing unit, an image filtering unit and a gap calculation unit;
the image acquisition module converts an analog signal in the camera into a binary data signal;
the image data analysis module receives a binary data signal and inputs the binary data signal into the image dividing unit;
the image dividing unit distinguishes binary data signals into a segment data signal and a shield tail data signal;
the image filtering unit is used for respectively carrying out data processing on the segment data signal and the shield tail data signal;
the gap calculation unit determines a correlation coefficient value K according to the segment data signal by the following formula (1):
K＝H/N
wherein H represents the numerical value of the thickness of the pipe piece; n represents the number N of pixels between the upper edge and the lower edge of the duct piece;
the clearance calculation unit determines a shield tail clearance value L according to the shield tail data signal through the following formula (2):
L＝K*M
wherein M represents the number M of pixels between the upper edge and the lower edge of the shield tail gap;
and the image output module outputs a shield tail clearance value L signal to a display.
2. The shield tail clearance measuring device for the shield tunneling machine according to claim 1, wherein the light supplementing mechanism is composed of an annular bracket, and the bracket is provided with the lamp sources at equal intervals.
3. The shield tail clearance measuring device for the shield tunneling machine according to claim 1 or 2, wherein the camera is provided with a zoom lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822230526.5U CN210530832U (en) | 2018-12-28 | 2018-12-28 | Shield tail clearance measuring device for shield tunneling machine |
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| CN201822230526.5U CN210530832U (en) | 2018-12-28 | 2018-12-28 | Shield tail clearance measuring device for shield tunneling machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081827A (en) * | 2019-05-30 | 2019-08-02 | 上海隧道工程有限公司 | Gap of the shield tail automatic testing method of the machine vision without object of reference |
| CN114413775A (en) * | 2022-03-28 | 2022-04-29 | 天津恒度量子精密仪器技术有限公司 | Shield tail gap measuring method and system of shield machine based on double-line laser vision |
-
2018
- 2018-12-28 CN CN201822230526.5U patent/CN210530832U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081827A (en) * | 2019-05-30 | 2019-08-02 | 上海隧道工程有限公司 | Gap of the shield tail automatic testing method of the machine vision without object of reference |
| CN114413775A (en) * | 2022-03-28 | 2022-04-29 | 天津恒度量子精密仪器技术有限公司 | Shield tail gap measuring method and system of shield machine based on double-line laser vision |
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