CN114166178A - Real-time deformation monitoring method and system for frame section of tunnel shield machine under construction - Google Patents
Real-time deformation monitoring method and system for frame section of tunnel shield machine under construction Download PDFInfo
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- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a real-time deformation monitoring method and a real-time deformation monitoring system for a frame section of a tunnel shield tunneling machine, which solve the problems that the acquisition of segment deformation monitoring data is not timely in the tunneling process of the shield tunnel at present, the installation difficulty of conventional equipment is high, and the expansibility is poor; the wireless module remotely controls the camera and the lamp targets to synchronously start up to work, images of all target lamp targets are obtained, pixel coordinates of the central point of the light emitting surface are obtained through a calculation system, the coordinate variation of all measuring points is calculated through a corresponding algorithm to obtain the accumulated deformation and the current deformation of all measuring points, the accumulated deformation and the current deformation are compared with a preset threshold value, the states of the measuring points are judged and returned to the lamp targets for monitoring and feedback.
Description
Technical Field
The invention relates to a tunnel deformation monitoring technology, in particular to a real-time deformation monitoring method and a real-time deformation monitoring system for a frame section of a tunnel construction shield machine.
Background
With the rapid development of urban economy, urban rail transit construction is carried out in all cities, and a shield method is mainly adopted for construction. The disturbance of surrounding underground water and soil can be caused in the tunneling process of the shield tunneling machine, so that the differential deformation of the tunnel structure is caused due to uneven stress, particularly, a lining ring which is just installed near the shield tunneling machine is easy to generate uneven settlement and horizontal lateral movement, the deformation is relatively large, and a construction accident can be caused in case of serious conditions, so that the deformation monitoring of the tunnel structure under construction of the frame section of the shield tunneling machine is particularly important.
The existing monitoring means mainly comprise manual monitoring, total station automatic monitoring and static level settlement monitoring. The total station automatically monitors that due to the influence of a frame and other construction equipment in a construction range, the instrument is difficult to erect, and the deformation of the duct piece in a period of time after the duct piece is installed cannot be monitored; and the installation degree of difficulty of hydrostatic level is big, along with shield structure construction process constantly impels, needs increase the level measurement station, then installs the whole set of monitoring system of debugging again, leads to the deflection can't be continuous, and hydrostatic level can only monitor the subside deformation of tunnel segment, can't acquire the horizontal displacement of tunnel segment.
Disclosure of Invention
The invention aims to provide a real-time deformation monitoring method and a real-time deformation monitoring system for a frame section of a tunnel shield machine, which are simple and convenient to construct and use, high in precision and strong in expansibility.
The technical purpose of the invention is realized by the following technical scheme:
a real-time deformation monitoring method for a frame section of a tunnel shield machine comprises the following steps:
carrying out site survey on the newly-built tunnel, selecting a testing camera set with a proper focal length according to a site testing range and testing precision requirements, laying a lamp target and the camera set at the waist position on one side of the site lining ring, and installing to form a deformation monitoring network;
after the layout and installation are finished, calibrating the deformation monitoring network, determining the initial position relation between the test camera set and the lamp target, and establishing a local coordinate system and a tunnel global coordinate system which are independent of each camera;
the method comprises the steps that a test camera set shoots, coordinate calculation is sequentially carried out along the advancing direction of a shield machine to obtain pixel coordinates of light spots of each lamp target, and the accumulated displacement variation and the current displacement variation of each monitoring lamp target are obtained on the basis of a deformation calculation module;
acquiring the accumulated displacement variation and the current displacement variation of each measuring point according to monitoring, comparing the accumulated displacement variation and the current displacement variation with a preset threshold value, and performing corresponding real-time pre-alarming;
with the advance of the tunnel, a testing camera set and a lamp target are additionally arranged at the corresponding positions of the newly-built lining ring, and form a new monitoring network with the existing monitoring network to perform real-time monitoring of all monitoring areas.
A real-time deformation monitoring system for a frame section of a tunnel shield machine comprises
The lamp target is provided with a light-emitting surface and is divided into a reference lamp target and a monitoring lamp target; the reference lamp target is arranged at the end of the tunnel, and the reference position is determined; a plurality of monitoring lamp targets are arranged along the advancing direction of the shield tunneling machine and fixedly installed on the shield tunnel lining pipe sheet according to a set distance;
the test camera set is horizontally and fixedly arranged on a lining pipe sheet of the shield tunnel, a plurality of test points are arranged at intervals along the advancing direction of the shield machine and located between the test points, and shooting and collecting target lamps of the test camera set respectively;
the wireless module is arranged in the test camera set and the lamp target, performs wireless communication, transmits control instructions to the test camera set and the lamp target and wirelessly transmits data acquired by the test camera;
the calculating system comprises a coordinate calculating module for calculating the center pixel coordinates of the shot light target light spot and a deformation calculating module for calculating deformation based on the coordinate calculating data. In conclusion, the invention has the following beneficial effects:
by adopting the machine vision measurement of the test camera set and the lamp target, the measurement precision is high, and the interference of external factors such as temperature, humidity, dust emission and the like in the tunnel is avoided; by adopting free combined networking of multiple testing camera sets and lamp targets, the continuity of early-stage deformation monitoring results can be ensured while the monitoring range is continuously enlarged only by continuously adding the testing cameras and the lamp targets in the shield tunneling process, pre-alarming can be carried out in real time, more visual prompt is given to field constructors, corresponding emergency measures are reminded to be taken on site, and the use is safer and more convenient.
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FIG. 1 is a schematic diagram of the present system;
FIG. 2 is a schematic view of a lamp target;
FIG. 3 is a schematic structural diagram of a test camera set;
FIG. 4 is a schematic flow chart of the method.
In the figure: 1. a lamp target; 2. a light emitting face; 3. testing the camera set; 4. an industrial camera; 5. leveling bubble.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
According to one or more embodiments, the real-time deformation monitoring system for the frame section of the shield tunneling machine under construction comprises a lamp target and a test camera set, wherein the reference lamp target, the test camera set and the monitor camera set are sequentially and alternately arranged along the advancing direction of the shield tunneling machine in a tunnel, and the lamp target and the test camera are fixedly arranged on a lining pipe sheet of the shield tunneling machine and are arranged at intervals along the advancing direction of the shield tunneling machine. The system also comprises a wireless module which is arranged on the test camera set and the lamp target for wireless communication, and a calculating system which receives data transmitted by the wireless module for calculation.
As shown in fig. 2, for the structural schematic diagram of monitoring lamp target, it is provided with two luminous surfaces, and is concrete, the luminous surface is a circular device, can send white light and supply the test camera group to gather the image, and then can obtain the pixel coordinate at light emitting device center through lamp target facula center pixel coordinate solution system, all be provided with the luminous surface at the front and the back and give out light, supply adjacent test camera group to shoot the collection, two-sided luminous lamp target is favorable to monitoring system to constantly expand along with the propulsion of shield structure. The reference lamp target is fixedly installed at the end of the tunnel and used as a reference point, the specific position of the reference lamp target is known, the reference lamp target is set to be a single light emitting surface, and the light emitting surface faces the advancing direction of the tunnel shield machine and is used for shooting by an adjacent test camera set to obtain an image of the reference lamp target. The wireless device is arranged in the lamp target, and the lamp target receives and transmits wireless signals through the top signal antenna.
As shown in fig. 3, the test camera set comprises two industrial cameras which are arranged in the internal horizontal position and are arranged in opposite shooting directions, the two industrial cameras are respectively shot and collected on target lamps of the two industrial cameras, and leveling air bubbles are arranged on the test camera set and used for leveling when the test camera set is installed and conducting horizontal calibration judgment, so that the installation level of the test camera set is enabled. Similarly, a wireless module is arranged in the test camera set, and signals are transmitted and received through a signal antenna arranged on the test camera set. The focal length of an industrial camera in the test camera set can be selected preferentially according to the distance between the measuring points, so that the target light spot of the target lamp can be imaged clearly, and the resolving precision of the pixel coordinate of the central point of the light spot is improved.
The reference lamp targets are at least two, and the reference lamp targets are kept in sight with an industrial camera which is close to the first testing camera set at the end of the tunnel and shoots the reference lamp targets, so that the reference lamp targets can be shot by the adjacent testing camera sets to acquire reference images after being luminous. The monitoring lamp targets arranged between the adjacent test camera sets are at least provided with two monitoring lamp targets, the monitoring lamp targets are respectively kept in sight with the industrial cameras shot on two sides, the cameras on two sides can be ensured to aim at the lamp targets at the same time, redundant observation quantity between the test adjacent camera sets is increased, the improvement of the resolving precision of the model is facilitated, meanwhile, the monitoring lamp targets between the two adjacent test camera sets are kept in sight, and therefore mutual shooting and checking are carried out. The test camera set and the lamp targets can be continuously expanded along with the pushing of the shield tunneling machine to form a continuous deformation monitoring network, the lamp targets far away from the position of the shield tunneling machine frame section serve as datum points in the deformation monitoring network, the communication between the test camera set and the target lamp targets is required to be kept in the networking observation process, and the overlapping of pictures on the light emitting surfaces of different lamp targets can not be caused when the test camera set shoots the lamp targets to form images.
The calculating system comprises a coordinate calculating module for calculating the center pixel coordinates of the shot light target light spot and a deformation calculating module for calculating the deformation of the transmitted coordinate calculating data. The deformation calculation module is used for monitoring and calculating each measuring point, the accumulated displacement variation of the measuring point can be obtained after the deformation calculation module is compared with the initial position and calculated, and the displacement variation of the time can be obtained after the deformation calculation module is compared with the last data. The calculation system is preset with measuring point deformation thresholds which comprise a current early warning threshold, a current alarm threshold, an accumulated early warning threshold and an accumulated alarm threshold, and judges the current displacement variation and the accumulated displacement variation of each measuring point obtained by calculation according to the measuring point deformation thresholds, and whether the current displacement variation and the accumulated displacement variation exceed the corresponding thresholds or not and sends corresponding light-emitting control instructions through the wireless module. The light emitting surface of each monitoring lamp target is provided with a plurality of light emitting colors, and the monitoring lamp targets correspondingly emit light through control instructions transmitted by the wireless module. The method specifically comprises the following steps:
when the accumulated displacement variation of the measuring point and the current displacement variation do not reach the early warning threshold value, the measuring point is in a dormant state and waits for the next acquisition and shooting;
when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, or the displacement variation reaches the early warning threshold and does not reach the alarm threshold, the measuring point lamp target emits yellow light to prompt;
when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, and the displacement variation reaches the alarm threshold, the measuring point lamp target sends out orange light for prompting;
when the accumulated displacement variation of the measuring point reaches an accumulated alarm threshold value, and the displacement variation reaches the early warning threshold value but does not reach the alarm threshold value, the measuring point lamp target sends out orange light for prompting;
when the accumulated displacement variation of the measuring point and the current displacement variation reach the alarm threshold, the lamp target of the measuring point emits red light for prompting.
After the deformation result of the lining segment at each lamp target measuring point is resolved, the color of the lamp target is set to be dormant and four different conditions of emitting yellow, orange or red light are set according to whether the early warning or warning value is reached, so that field operators are reminded to take corresponding measures in time.
The wireless module adopts Lora or zigBee to communicate, because signal communication conditions in the construction tunnel are limited, and 4G network signal transmission cannot be adopted, the wireless module (Lora or zigBee) can be adopted to communicate, and remote acquisition control and data transmission are achieved. The wireless module controls the on and off of the lamp targets and the light emitting colors of the lamp targets, and controls the camera groups to shoot synchronously after the lamp targets are turned on.
The power supply condition in the construction tunnel is relatively poor, so that a rechargeable lithium battery can be adopted for supplying power, a quick battery replacing switch is arranged on the testing camera set and the lamp target, the built-in battery is replaced through button opening and closing, the operation is simple, and meanwhile, the instability of a measuring point caused by the movement of the lamp target and the camera in the process of replacing the battery can be avoided.
The device comprises a camera unit, a lamp target, a fixing device and a clamping device, wherein the camera unit is arranged on the lamp target; the buckling device is used for fixing the mounting base with the camera and the lamp target on the tunnel lining pipe sheet. For the tunnel lining segment with the embedded groove, a T-shaped screw can be used as a buckling device; for the duct piece without the embedded groove, the duct piece can be drilled firstly, and an expansion screw is installed to serve as a buckling device. The buckling device is easy to operate in the installation process, and the requirement of rapid operation in the tunnel is met. The stability of the whole monitoring system is ensured by the fixing device.
The method comprises the steps of fixedly installing a test camera set and a lamp target in a tunnel, controlling the lamp target to emit light and shooting and collecting the test camera set by sending a control instruction, carrying out coordinate and displacement calculation on a shot and collected image by a calculation system to obtain the displacement variation of each measuring point, controlling the corresponding test lamp target to carry out corresponding light-emitting indication by comparing threshold values, and correspondingly installing the test camera set and the lamp target of each measuring point along with the shield advance of the tunnel to carry out deformation real-time monitoring. And comparing the measured value with an early warning value and an alarm value preset by the system, judging the state of the measured point, simultaneously returning the measured point state result to the lamp target, controlling the light-emitting color of the lamp target and realizing the real-time monitoring and feedback of the monitored data.
According to one or more embodiments, a real-time deformation monitoring method for a frame section of a shield tunneling machine under construction is disclosed, as shown in fig. 4, the method comprises the following steps:
s1, performing site survey of the newly-built tunnel, selecting a testing camera set with a proper focal length according to the site testing range and the testing precision requirement, arranging a lamp target and the camera set at the waist position on one side of the site lining ring, and installing to form a deformation monitoring network. The method specifically comprises the following steps:
installing a reference lamp target at the end of the tunnel, wherein the light emitting surface of the reference lamp target faces the advancing direction of the shield tunneling machine; along the advancing direction of shield structure machine, install test camera group and monitoring lamp target on the lining cutting section of jurisdiction in proper order, the test camera group carries out horizontal installation through the judgement of level bubble, and the monitoring lamp target is shot the formation of image through two-sided luminous its adjacent both sides test camera group of confession, and the test camera group shoots the formation of image respectively to its target monitoring lamp target through built-in two industrial cameras that shoot opposite direction.
And adjusting the test camera set and the monitoring lamp target to ensure that the test camera set and the lamp target for shooting and imaging are kept in sight. In the arrangement and installation of the deformation monitoring net, the opposite industrial cameras in the two adjacent test camera groups also keep through-view mutual shooting imaging.
As shown in fig. 1, the test camera set and the lamp target at each position are installed according to a pre-designed deformation monitoring network, wherein M1 and M2 in fig. 1 are reference points in a test range and are single-sided light-emitting lamp targets; m3, M6 and M9 are test camera sets and deformation monitoring points; m4, M5, M7, M8, M10 and M11 are deformation monitoring points between the two-phase machine set and are double-sided light-emitting lamp targets; the perspective needs to be kept between each testing camera set and the target lamp, so that the phenomenon that the pixel coordinates of the central point of the light emitting surface cannot be resolved due to the overlapping of the light emitting surfaces of a plurality of lamp targets when the cameras shoot and image is avoided; the focal length of the camera is also selected to avoid acquiring images of non-target targets.
And S2, calibrating the deformation monitoring net after the layout and installation are finished, determining the initial position relation between the test camera set and the lamp target, and establishing the independent local coordinate system and the tunnel global coordinate system of each camera. Specifically, the method comprises the following steps:
the initial position relation between the test camera group and the lamp target is determined in sequence from the test camera group adjacent to the reference lamp target.
Each industrial camera takes the optical center of the camera as an origin, the shooting direction of the industrial camera is taken as a Y axis, the vertical direction of the industrial camera is taken as a Z axis, and the direction which passes through the origin in the horizontal plane and is vertical to the Y axis is taken as an X axis to establish a local coordinate system of the camera.
And establishing a tunnel global coordinate system by taking the tunnel end reference lamp target as an origin, the shield tunneling machine advancing direction as a Y axis, the vertical direction as a Z axis and the direction perpendicular to the Y axis through the origin in a horizontal plane as an X axis.
S3, shooting by the testing camera set, sequentially carrying out coordinate calculation along the advancing direction of the shield machine to obtain pixel coordinates of light spots of each lamp target, converting the pixel coordinates into displacement coordinates by the deformation calculation module, and comparing the last displacement coordinates of each monitoring lamp target to obtain the displacement variable quantity of the time. The method specifically comprises the following steps:
the industrial cameras in each test camera set shoot and image the target lamp targets of the industrial cameras simultaneously, coordinates and displacement of the test camera sets shooting the reference lamp targets are calculated based on known positions of the reference lamp targets, accumulated displacement variation is obtained by comparing initial positions, and the displacement variation is obtained by comparing the initial positions with the previous monitored coordinates.
And calculating the coordinate position of the test camera set based on the shooting reference lamp target, and shooting and calculating the monitoring lamp target on the other side of the shot by the test camera set to obtain the corresponding coordinate and displacement of the monitoring lamp target.
And analogizing in turn, and calculating and obtaining the coordinates and the displacements of each test camera set and each monitoring lamp target along the Y-axis direction of the tunnel coordinate system.
And S4, acquiring the accumulated displacement variation and the current displacement variation of each measuring point according to monitoring, comparing the accumulated displacement variation and the current displacement variation with a preset threshold value, and performing corresponding real-time pre-alarming.
And presetting an accumulated early warning threshold, an accumulated alarm threshold, a current early warning threshold and a current alarm threshold for each measuring point according to the accumulated displacement variation and the current displacement variation. The emission of the corresponding test light target is controlled through the corresponding threshold value to set color light for prompting:
when the accumulated displacement variation of the measuring point and the current displacement variation do not reach the early warning threshold value, the measuring point is in a dormant state and waits for the next acquisition and shooting; when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, or the displacement variation reaches the early warning threshold and does not reach the alarm threshold, the measuring point lamp target emits yellow light to prompt; when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, and the displacement variation reaches the alarm threshold, the measuring point lamp target sends out orange light for prompting; when the accumulated displacement variation of the measuring point reaches an accumulated alarm threshold value, and the displacement variation reaches the early warning threshold value but does not reach the alarm threshold value, the measuring point lamp target sends out orange light for prompting; when the accumulated displacement variation of the measuring point and the current displacement variation reach the alarm threshold, the lamp target of the measuring point emits red light for prompting.
The displacement coordinate variation of each measuring point is caused by three factors, namely the actual displacement of the measuring point, the movement of the camera and the rotation of the camera. Because the horizontal displacement and the vertical displacement of each measuring point are independent, the method can be used for solving a single equation, and the solving of the vertical displacement is taken as an example to introduce a solving process:
the displacement of each measurement point along the local coordinate axis of each camera is assumed to be positive, and positive rotation around the local coordinate axis of each camera is assumed to be positive. Regardless of the rotation of the camera around the optical axis Y, the rotation of the camera around the X axis and the displacement of the camera along the Z axis can generate the vertical displacement coordinate change of the shot measuring point
Taking fig. 1 as an example, first, using the reference point M1, the coordinate variation of M2 is always zero or known, and the displacement of the camera M3 is calculated
In the formula (1), the reaction mixture is,
displacement coordinates of the reference points M1 and M2 in the initial image;
for monitoring the displacement coordinates of the reference point M1 and M2 in the image during the process; Δ z1，Δz2For the vertical displacement of the reference point M1, M2, which is known, for example, as the stationary point, Δ z1＝Δz2＝0；Δz3，α3Vertical displacement and rotation angle around a local coordinate axis X of a left camera in the camera group M3 are respectively;
the distances between M1 and M3, M2 and M3, respectively, along the Y-axis, and are assumed to remain constant at all times.
The vertical displacement delta z of the left camera in the camera group M3 can be calculated by the formula (1)3And an angle of rotation alpha about its local coordinate axis X3Then the vertical displacement of the right camera in the camera group M3 is Δ z3The angle of rotation about its local coordinate axis X being-alpha3。
The right camera in the camera group M3 can shoot the measuring points M4 and M5 and the left camera in the camera group M6; the left camera in camera group M6 may capture the side points M4, M5 and the right camera in camera group M6.
The right camera in the camera group M3 shoots measuring points M4 and M5;
from the equation (2), the vertical displacement Δ z of the measuring points M4 and M5 can be calculated4And Δ z5。
The left camera in the camera group M6 shoots measuring points M4 and M5;
the vertical displacement Delta z of the left camera in the camera group M6 can be calculated by the formula (3)6And an angle of rotation alpha about its local coordinate axis X6。
Inter-capture between the right camera in camera group M3 and the left camera in camera group M6:
equation (4) can be used as a redundancy equation to reduce the solution error to the camera shift.
Obviously, a measuring point can be additionally arranged between M3 and M6, and as redundant observation, the solution error can be further reduced through least square adjustment.
By utilizing the method of the steps, the vertical displacement delta z of the measuring points M7 and M8 can be further calculated8And Δ z9Vertical displacement of two cameras in the camera group M9 and rotation angle around local coordinate axis X of each camera, and vertical displacement delta z of measuring points M10 and M11 are calculated10And Δ z11。
Because the directions of the local coordinate axis Z of each camera are consistent with the direction of the overall coordinate axis Z, the vertical displacement of each measuring point calculated in the steps is the vertical displacement of each measuring point in the overall coordinate system, the positive value is uplift, and the negative value is settlement.
The calculated accumulated variation delta z of the vertical displacement of each measuring point as a settlement valueiThe current variation of each measuring point can be obtained by carrying out difference on the current accumulated variation and the last accumulated variationChemical quantity delta zi. Similarly, the accumulated variation quantity Deltax of horizontal lateral movement of each measuring point can be obtainediAnd the current variation delta xi。
And comparing the accumulated change and the current change result of each measuring point with the accumulated early warning, accumulated alarm, current early warning and current alarm values preset by the system, so that the light emitting indication control of the measuring point target can be realized.
S5, along with the advance of the tunnel, a testing camera set and a lamp target are additionally arranged at the corresponding position of the newly-built lining ring, and form a new monitoring network with the existing monitoring network to perform real-time monitoring of all monitoring areas.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A real-time deformation monitoring method for a frame section of a tunnel shield machine is built, and is characterized by comprising the following steps:
carrying out site survey on the newly-built tunnel, selecting a testing camera set with a proper focal length according to a site testing range and testing precision requirements, laying a lamp target and the camera set at the waist position on one side of the site lining ring, and installing to form a deformation monitoring network;
after the layout and installation are finished, calibrating the deformation monitoring network, determining the initial position relation between the test camera set and the lamp target, and establishing a local coordinate system and a tunnel global coordinate system which are independent of each camera;
the test camera set shoots, coordinate calculation is sequentially carried out along the advancing direction of the shield tunneling machine to obtain pixel coordinates of light spots of each lamp target, the pixel coordinates are converted into displacement coordinates based on a calculation system, and the last displacement coordinates of each lamp target are compared to obtain the displacement variable quantity;
acquiring the accumulated displacement variation and the current displacement variation of each measuring point according to monitoring, comparing the accumulated displacement variation and the current displacement variation with a preset threshold value, and performing corresponding real-time pre-alarming;
with the advance of the tunnel, a testing camera set and a lamp target are additionally arranged at the corresponding positions of the newly-built lining ring, and form a new monitoring network with the existing monitoring network to perform real-time monitoring of all monitoring areas.
2. The method for monitoring the real-time deformation of the frame section of the tunnel shield tunneling machine according to claim 1, wherein the installation and the layout of the deformation monitoring net are as follows:
installing a reference lamp target at the end of the tunnel, wherein the light emitting surface of the reference lamp target faces the advancing direction of the shield tunneling machine;
sequentially installing a test camera set and a monitoring lamp target on a lining segment along the advancing direction of a shield machine, leveling the test camera set through leveling bubbles, shooting and imaging the monitoring lamp target by the adjacent two-side test camera set through double-sided light emission, and respectively shooting and imaging the target lamp target by the test camera set through two built-in industrial cameras with opposite shooting directions;
and adjusting the test camera set and the monitoring lamp target to ensure that the test camera set and the lamp target for shooting and imaging are kept in sight.
3. The method for monitoring the real-time deformation of the frame section of the shield tunneling machine under construction according to claim 2, wherein the method comprises the following steps: in the arrangement and installation of the deformation monitoring net, the opposite industrial cameras in the two adjacent test camera groups also keep through-view mutual shooting imaging.
4. The method for monitoring the real-time deformation of the frame section of the shield tunneling machine under construction according to claim 2, wherein the method comprises the following steps: determining the initial position relation between the test camera set and the lamp target in sequence from the test camera set adjacent to the reference lamp target;
each industrial camera takes the center of the camera as an origin, the shooting direction of the industrial camera is taken as a Y axis, the vertical direction of the industrial camera is taken as a Z axis, and the direction which passes through the origin in the horizontal plane and is vertical to the Y axis is taken as an X axis to establish a local coordinate system of the camera;
establishing a tunnel global coordinate system by taking a tunnel end reference lamp target as an origin, taking the traveling direction of a shield tunneling machine as a Y axis, taking the traveling direction of the shield tunneling machine as a Z axis vertically upwards and taking the direction which is vertical to the Y axis through the origin in a horizontal plane as an X axis;
shooting and resolving, and determining the distance position relation between the test camera group and the target of the target lamp and the coordinates corresponding to the tunnel coordinate system.
5. The method for monitoring the real-time deformation of the frame section of the in-building tunnel shield machine according to claim 4, wherein the monitoring and resolving specifically comprises the following steps:
the industrial cameras in each test camera set shoot and image the target lamp targets of the industrial cameras simultaneously, coordinates and displacement of the test camera sets for shooting the reference lamp targets are calculated based on known positions of the reference lamp targets, accumulated displacement variation is obtained by comparing initial positions, and the displacement variation is obtained by comparing the initial positions with the previous monitored coordinates;
calculating the coordinate position of a test camera set based on the shooting reference lamp target, and shooting and calculating the monitoring lamp target on the other side of the shot by the test camera set to obtain the corresponding coordinate and displacement of the monitoring lamp target;
and analogizing in turn, and calculating and obtaining the coordinates and the displacements of each test camera set and each monitoring lamp target along the Y-axis direction of the tunnel coordinate system.
6. The method for monitoring the real-time deformation of the frame section of the in-building tunnel shield machine according to claim 5, wherein the real-time pre-alarm specifically comprises:
presetting an accumulated early warning threshold, an accumulated alarm threshold, a current early warning threshold and a current alarm threshold for each measuring point according to the accumulated displacement variation and the current displacement variation;
controlling the corresponding test light target to emit light with a set color for prompting through the corresponding threshold value;
when the accumulated displacement variation of the measuring point and the current displacement variation do not reach the early warning threshold value, the measuring point is in a dormant state and waits for the next acquisition and shooting;
when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, or the displacement variation reaches the early warning threshold and does not reach the alarm threshold, the measuring point lamp target emits yellow light to prompt;
when the accumulated displacement variation of the measuring point reaches the accumulated early warning threshold and does not reach the accumulated alarm threshold, and the displacement variation reaches the alarm threshold, the measuring point lamp target sends out orange light for prompting;
when the accumulated displacement variation of the measuring point reaches an accumulated alarm threshold value, and the displacement variation reaches the early warning threshold value but does not reach the alarm threshold value, the measuring point lamp target sends out orange light for prompting;
when the accumulated displacement variation of the measuring point and the current displacement variation reach the alarm threshold, the lamp target of the measuring point emits red light for prompting.
7. The utility model provides a real-time deformation monitoring system at construction tunnel shield constructs quick-witted frame section which characterized by: comprises that
The lamp target is provided with a light-emitting surface and is divided into a reference lamp target and a monitoring lamp target; the reference lamp target is arranged at the end of the tunnel, and the reference position is determined; a plurality of measuring points are arranged on the monitoring lamp target along the advancing direction of the shield tunneling machine and fixedly arranged on a shield tunnel lining segment according to a set distance;
the test camera set is horizontally and fixedly arranged on a lining pipe sheet of the shield tunnel, a plurality of test points are arranged at intervals along the advancing direction of the shield machine and located between the test points, and shooting and collecting target lamps of the test camera set respectively;
the wireless module is arranged in the test camera set and the lamp target, performs wireless communication, transmits control instructions to the test camera set and the lamp target and wirelessly transmits data acquired by shooting of the test camera;
the calculating system comprises a coordinate calculating module for calculating the center pixel coordinates of the shot light target light spot and a deformation calculating module for calculating the deformation of the transmitted coordinate calculating data.
8. The system for monitoring the deformation of the frame section of the in-building tunnel shield machine according to claim 7, which is characterized in that: the test camera set comprises two industrial cameras which are horizontally arranged and have opposite shooting directions; at least two reference lamp targets and at least two monitoring lamp targets between every two testing camera sets are arranged;
the industrial cameras of the test camera groups are kept in sight with the target of the target lamp, and the opposite industrial cameras in the two adjacent test camera groups are kept in sight.
9. The system for monitoring the deformation of the frame section of the in-building tunnel shield machine according to claim 7, which is characterized in that: the system is preset with measuring point deformation thresholds including a current early warning threshold, a current warning threshold, an accumulated early warning threshold and an accumulated warning threshold;
the calculating system calculates and obtains the current displacement variation and the accumulated displacement variation of each measuring point; the system correspondingly outputs a light-emitting control instruction through the wireless module according to the relation between the variable quantity and the threshold value;
the benchmark lamp target is single luminous surface, the monitoring lamp target is double luminous surface lamp target, and the light emitting surface of each monitoring lamp target all is provided with a plurality of luminous colours, the monitoring lamp target responds to the control command of wireless module output and corresponds luminous instruction.
10. The method and the system for monitoring the real-time deformation of the frame section of the in-building tunnel shield machine according to claim 7, wherein the method comprises the following steps: the wireless module adopts Lora or zigBee to carry out communication.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115205369A (en) * | 2022-08-03 | 2022-10-18 | 江苏科技大学 | Atmospheric turbulence resistant lamp target image displacement extraction algorithm |
| CN117704967A (en) * | 2024-02-05 | 2024-03-15 | 中铁西南科学研究院有限公司 | Machine vision-based blast hole position dynamic measurement method, target and measurement system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449393A (en) * | 2017-09-18 | 2017-12-08 | 机械工业勘察设计研究院有限公司 | A kind of urban track traffic tunnel deformation monitoring system and method |
| CN110411408A (en) * | 2019-07-11 | 2019-11-05 | 浙江大学 | A kind of surface subsidence monitoring method based on computer vision |
| CN111608731A (en) * | 2020-05-25 | 2020-09-01 | 北京市地铁运营有限公司 | Shield tunnel safety state monitoring and early warning device and monitoring and early warning method thereof |
-
2021
- 2021-12-09 CN CN202111502081.1A patent/CN114166178B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449393A (en) * | 2017-09-18 | 2017-12-08 | 机械工业勘察设计研究院有限公司 | A kind of urban track traffic tunnel deformation monitoring system and method |
| CN110411408A (en) * | 2019-07-11 | 2019-11-05 | 浙江大学 | A kind of surface subsidence monitoring method based on computer vision |
| CN111608731A (en) * | 2020-05-25 | 2020-09-01 | 北京市地铁运营有限公司 | Shield tunnel safety state monitoring and early warning device and monitoring and early warning method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115205369A (en) * | 2022-08-03 | 2022-10-18 | 江苏科技大学 | Atmospheric turbulence resistant lamp target image displacement extraction algorithm |
| CN115205369B (en) * | 2022-08-03 | 2024-04-02 | 江苏科技大学 | Anti-atmospheric turbulence lamp target image displacement extraction algorithm |
| CN117704967A (en) * | 2024-02-05 | 2024-03-15 | 中铁西南科学研究院有限公司 | Machine vision-based blast hole position dynamic measurement method, target and measurement system |
| CN117704967B (en) * | 2024-02-05 | 2024-05-07 | 中铁西南科学研究院有限公司 | Machine vision-based blast hole position dynamic measurement method, target and measurement system |
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