CN112344905A - Roadbed settlement detection device and method for prolonging battery replacement period of roadbed settlement detection device - Google Patents
Roadbed settlement detection device and method for prolonging battery replacement period of roadbed settlement detection device Download PDFInfo
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Abstract
The invention discloses a roadbed settlement detection device and a method for prolonging the battery replacement period of the roadbed settlement detection device, wherein the roadbed settlement detection device comprises a remote control terminal and a plurality of monitoring machines arranged on sleepers; each monitoring machine comprises a transmission module, an image sensing module, a laser emission module, a control assembly and a battery assembly; the transmission module receives a starting-up instruction issued by the remote control terminal and controls the battery assembly to supply power to the monitoring machine according to the starting-up instruction; after the equipment is powered on, the control assembly feeds back a starting signal to the transmission module, and the transmission module collects a target plate image captured by the image sensing module and uploads the target plate image to the remote control terminal; the remote control terminal issues a shutdown instruction after receiving the target plate image, and the transmission module responds to the shutdown instruction to control the battery assembly to stop supplying power to the equipment; according to the invention, the transmission module in the monitoring machine is controlled to turn on or turn off the working power supply through network communication, so that the monitoring machine keeps intermittent work, and the electric quantity loss caused by long-term standby work of the monitoring machine is reduced.
Description
Technical Field
The invention belongs to the technical field of railway roadbed monitoring, and particularly relates to a roadbed settlement detection device and a method for prolonging the battery replacement period of the roadbed settlement detection device.
Background
With the high-speed development of the railway traffic construction industry in China, the wide construction of high-speed railways becomes a necessary trend for the development of the railway traffic industry in China. The roadbed is a key part in the rail traffic engineering, is a basic bearing system of a rail structure and train load, and if structural deformation exists, the rail is deformed, so that the train is seriously vibrated, and even safety accidents occur. Therefore, effective measures are taken to accurately control the post-construction settlement deformation problem of the railway ballastless track offline engineering in order to ensure the safe operation of the train.
The traditional monitoring methods include an observation pile method, a settlement plate method, a settlement cup method, a sensor monitoring method and the like, and although the methods are convenient to install, the methods need manual point-by-point measurement, cannot realize automatic monitoring and have higher cost. At present, a method for relay measurement of deformation based on laser is provided, which is a novel non-contact instant settlement measurement method. Clear and high-quality laser spot images are obtained by utilizing the collimation characteristics of the spot laser and an image detection technology, and roadbed settlement deformation relative to a reference point is reflected by accurately positioning the center of the spot images. Because the monitoring to the railway roadbed settlement deformation is long-term and automatic, but present monitoring system all adopts the battery to supply power, and power consumption is very fast when monitoring system long-term operation is in operating condition, needs frequent change battery, brings a large amount of wasting of resources and artifical consumption.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a roadbed settlement detection device and a method for prolonging the battery replacement period of the roadbed settlement detection device.A remote control terminal controls a transmission module in a monitoring machine to turn on or turn off a working power supply of the monitoring machine in a network communication mode, and intermittently acquires the change data information of a railway roadbed; the transmission module sends the acquired image data information to the remote control terminal in a network mode, and the remote control terminal fuses and analyzes relative displacement data of all roadbed sections to finally obtain the absolute displacement of a certain section in the whole railway roadbed interval.
To achieve the above object, according to one aspect of the present invention, there is provided a roadbed settlement detecting apparatus, including a remote control terminal and a plurality of monitoring machines installed on sleepers; each monitoring machine comprises a transmission module, an image sensing module, a laser emission module, a control assembly and a battery assembly;
the transmission module is used for receiving a starting-up instruction issued by the remote control terminal and controlling the battery assembly to supply power to the image sensing module, the laser emission module and the control assembly according to the starting-up instruction;
after the image sensing module, the laser emission module and the control assembly are powered on, the control assembly generates a power-on signal and sends the power-on signal to the transmission module, and the transmission module collects the target plate image captured by the image sensing module and transmits the target plate image to the remote control terminal;
and the remote control terminal issues a shutdown instruction after receiving the target plate image uploaded by the transmission module, and the transmission module responds to the shutdown instruction to control the battery assembly to stop supplying power to the image sensing module, the laser emission module and the control assembly.
Preferably, in the roadbed settlement detection device, the image sensing module in each monitoring machine comprises a laser target plate and a camera aligned with the laser target plate;
the camera intermittently captures a target plate image formed on the laser target plate by laser irradiation emitted by a laser emitting module in the previous monitoring machine under the triggering of the transmission module.
Preferably, the roadbed settlement detecting device is characterized in that the remote control terminal processes the received target plate image to obtain a coordinate of a laser spot center, and compares the coordinate with a reference coordinate or a coordinate of the laser spot center acquired by the same monitoring machine at the previous time to obtain an offset of the laser spot center, which is used as a relative displacement between adjacent roadbed sections.
Preferably, the roadbed settlement detecting device is characterized in that the method for the remote control terminal to acquire the coordinates of the laser spot center is as follows:
determining a target surface image of a laser irradiation area from the target plate image, and determining edge position information of a laser spot according to the target surface image by adopting a contour retrieval method; and determining the relative coordinate value of the center of the laser spot by adopting a method of solving the coordinate by fitting according to the edge position information of the laser spot.
Preferably, the roadbed subsidence detection device is characterized in that the remote control terminal is further configured to, before determining the target surface image of the laser irradiation region from the target plate image:
and performing image preprocessing on the target plate image, wherein the image preprocessing comprises at least one or more of denoising processing, histogram equalization and thresholding processing.
Preferably, the roadbed settlement detection device is characterized in that the remote control terminal further sums the offset of the laser spot center measured by a single monitoring machine and the offsets of the laser spot centers corresponding to other monitoring machines to obtain the actual settlement data of the roadbed end face corresponding to each monitoring machine.
Preferably, the roadbed settlement detection device is characterized in that the transmission module is a 4G network relay and has a command instruction function and a data transmission function.
Preferably, the roadbed settlement detection device is characterized in that the 4G network relay interacts with a remote control terminal through a 4G-LTE network TCP/IP protocol.
According to another aspect of the present invention, there is also provided a method of extending a battery replacement cycle of a roadbed settlement detection device, including the steps of:
s1: when the detection condition is met, the remote control terminal issues a starting-up instruction to a transmission module in the monitoring machine, and the transmission module responds to the starting-up instruction to control the output terminal of a battery assembly in the monitoring machine to be closed so as to supply power to the monitoring machine;
s2: after the power is received and started, a control assembly in the monitoring machine feeds back a starting signal to a transmission module, and the transmission module acquires a target plate image captured by an image sensing module in the monitoring machine and transmits the target plate image to a remote control terminal;
s3: the remote control terminal sends a shutdown instruction after receiving the target plate image uploaded by the transmission module, and the transmission module responds to the shutdown instruction to control the output terminal of the battery assembly to be disconnected and stops supplying power to the image sensing module, the laser emission module and the control assembly;
s4: the monitoring machine stops working.
Preferably, in the method for prolonging the battery replacement period of the subgrade settlement detection device, the transmission module is a 4G network relay, and has a command instruction function and a data transmission function; the 4G network relay interacts with the remote control terminal through a 4G-LTE network TCP/IP protocol.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
according to the roadbed settlement detection device and the method for prolonging the battery replacement period of the roadbed settlement detection device, the remote control terminal issues the opening or closing instruction to the transmission module, and the transmission module controls the power supply of the monitoring machine to be opened or closed, so that the monitoring machine keeps intermittent work, and the electric quantity loss caused by long-term standby work of the monitoring machine and the manual consumption required by frequent battery replacement are reduced. Through the intermittent power supply starting working mode, the battery load power consumption of the monitoring machine in idle time is greatly reduced, the service life of the battery is prolonged, and the working period of manually replacing the battery of the monitoring machine is prolonged.
Drawings
Fig. 1 is a schematic diagram of the general structure of a roadbed settlement detection device provided by the embodiment of the invention;
FIG. 2 is a schematic diagram of a component structure of a monitoring machine according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an operating principle of a transmission module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an image data processing flow provided by an embodiment of the invention;
FIG. 5 is a schematic diagram of contour retrieval provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of the offset of the monitoring point according to an embodiment of the present invention;
fig. 7 is a schematic layout diagram of a plurality of monitoring machines according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic diagram of an overall structure of a roadbed settlement detection device provided in this embodiment, and referring to fig. 1, the device includes a remote control terminal and a plurality of monitoring machines, the monitoring machines are installed on sleepers along a railway line direction, the remote control terminal communicates with each of the monitoring machines through a network to control on/off of a working power supply in the monitoring machine, so that the monitoring machines intermittently acquire change data of a railway roadbed and send the data information to the remote control terminal through the network; and the remote control terminal finally obtains the absolute displacement of a certain section in the whole railway roadbed interval by fusing and analyzing the relative displacement data of all the roadbed sections.
Fig. 2 is a schematic structural diagram of the monitoring machines provided in this embodiment, and as shown in fig. 2, each monitoring machine includes a 4G transmission module, an image sensor, a laser emitter, a control assembly, and a battery assembly;
the transmission module is used for receiving a starting-up instruction issued by the remote control terminal and controlling the battery assembly to supply power to the image sensing module, the laser emission module and the control assembly according to the starting-up instruction;
after the image sensing module, the laser emission module and the control assembly are powered on, the control assembly generates a power-on signal and sends the power-on signal to the transmission module, and the transmission module collects a target plate image captured by the image sensing module and transmits the target plate image to the remote control terminal;
and the remote control terminal issues a shutdown instruction after receiving the target plate image uploaded by the transmission module, and the transmission module responds to the shutdown instruction to control the battery assembly to stop supplying power to the image sensing module, the laser emission module and the control assembly.
Referring to fig. 3, the remote control terminal issues a power-on instruction to the 4G transmission module, the 4G transmission module controls the laser transmitter, the image sensor and the control assembly to be powered on and powered on, and the control assembly feeds back a power-on signal to the 4G transmission module;
the image sensor in each monitoring machine comprises a laser target plate and a camera aligned with the laser target plate; the camera intermittently captures target plate images formed on the laser target plate by the laser emitted by the laser emitting module in the previous monitoring machine under the trigger of the 4G transmission module. The 4G transmission module transmits the target plate image acquired by the camera to the remote control terminal; after the remote control terminal receives the collected data, a shutdown control instruction is issued, the 4G transmission module controls the laser transmitter, the image sensor, the control assembly and other equipment to be powered off, and the feedback signal of the control assembly is interrupted. And the remote control terminal processes and analyzes the acquired target plate image.
In this embodiment, the camera includes a lens set, a CMOS, and a map transmission module, the laser target plate is a circular target plate and is installed on the image sensor of the previous monitor, the laser light source emits laser light to the laser target plate of the next monitor, the laser light is imaged on the CMOS component through the lens, and the CMOS on each monitor acquires an image on the current laser target plate.
The 4G transmission module has networking switching control capability and has an instruction command function and a data transmission function. The data transmission function is that the image sensor sends image data to the 4G transmission module through a serial port, and the 4G transmission module forwards the image data to the remote control terminal through a 4G-LTE network TCP/IP protocol by utilizing the data transmission function of the 4G transmission module to process and analyze the image data; the instruction control function is that the remote control terminal issues a power-on/off instruction to the 4G transmission module through a 4G-LTE network TCP/IP protocol, and the 4G transmission module turns on or off a power switch in the monitoring machine. In this embodiment, the 4G transmission module is a 4G network relay, and includes a data transmission unit and a serial port modbus protocol relay; the data transmission unit is used for sending networking data in an uplink mode, and the address and the port of the remote server are configured in the data transmission unit; the remote control terminal issues a starting-up instruction remotely to electrify the serial port modbus protocol relay, the data transmission unit issues a starting-up signal to the relay to connect the battery assembly and the 4G transmission module, after the battery assembly is connected, current passes through the electromagnetic coil, the electromagnet generates magnetism, the spring switch is attracted, and the working circuit is connected; the battery pack supplies power to the image sensor, the laser transmitter and the control assembly through the 4G transmission module, so that the monitoring machine is powered on for use, and the effect of remote control is achieved. The 4G network relay easily realizes the networking function of the serial equipment through the SIM card, and has the expansion function that one path of relay and one path of switching value are selectable.
After the CMOS assembly shoots the target plate, the 4G transmission module uploads the shot image data to the remote control terminal, the remote control terminal compares and analyzes the positions of laser points on the images collected twice in the front and at the back, and the subgrade settlement condition is calculated from the center coordinates of laser spots. Specifically, the remote control terminal processes the received target plate image to obtain the coordinates of the laser spot center, and compares the coordinates with the reference coordinates or the coordinates of the laser spot center collected by the same monitoring machine at the previous time to obtain the offset of the laser spot center, which is used as the relative displacement between adjacent roadbed sections.
In this embodiment, the method for the remote control terminal to obtain the coordinates of the laser spot center includes:
determining a target surface image of a laser irradiation area from the target plate image, and determining edge position information of a laser spot according to the target surface image by adopting a contour retrieval method; and determining the relative coordinate value of the center of the laser spot by adopting a method of solving the coordinate by fitting according to the edge position information of the laser spot.
Before determining a target surface image of a laser irradiation area from the target plate image, the remote control terminal also performs image preprocessing on the target plate image, wherein the image preprocessing comprises at least one or more of denoising processing, histogram equalization and thresholding processing.
Fig. 4 is a schematic diagram of an image data processing flow provided in this embodiment, and referring to fig. 4, the method specifically includes the following steps:
(1) image filtering process
In the image acquisition process, noise is introduced into the imaging device and the transmission channel, and the original target plate image is polluted to a certain extent under the influence of illumination, so that the measurement precision is influenced to a certain extent. The embodiment firstly adopts a median filtering method to effectively filter noise in the image and preserve the sharpness of the edge. The specific algorithm of the median filtering is to select a rectangular window with the size of M x N to traverse and slide on the image, and replace the grey value of the pixel at the center of the window with the median grey in the pixel value set in the operation window.
(2) Histogram equalization
In order to enhance the contrast and make the laser spots in the gray-scale image of the target plate image more prominent, the embodiment performs histogram equalization operation on the target plate image. Specifically, the method comprises the following steps: the first step scans all pixels in the gray scale map of the target plate image, calculates the normalized histogram H of the image,
wherein n is the total number of image pixels, nkIs the kth gray in the imageTotal number of pixels of degree scale, rkIs the kth gray level (k-0, 1, 2.. 255).
The second step is to calculate the histogram integral, and the calculation formula is as follows:
and finally, performing image transformation by taking H' as a lookup table:
dst(x，y)＝H′(src(x，y))
(3) thresholding
After contrast is enhanced, a threshold function threshold in OpenCV is selected to select a proper range (determined according to actual conditions) from gray level, and threshold segmentation is realized through the following formula.
In the embodiment, the threshold range is selected from 180-.
After simple thresholding, the image is segmented into a binarized image containing the object (white region) and the background (black region). However, there will be some small black holes in the white area of the image, and in addition, there will be some small white lumps in the black area, and in order to ensure the uniqueness of the following contour identification result, it is also necessary to divide the image to be processed into two independent and complete areas through morphological operations (erosion, dilation).
(4) Contour retrieval
In the obtained binary image, the laser spot corresponds to a white area, the background corresponds to black pixels, and the contour is retrieved. Contour retrieval selects a polygon approximation that becomes accurate for a closed boundary when the number of edges of the polygon equals the number of points on the boundary, where each pair of adjacent points defines an edge of the polygon. The found contours are marked with green lines.
After the contour is found, in order to calculate the pixel distance conveniently, a boundary box needs to be drawn on the contour, the extraction of the rectangular boundary box is based on a Douglas-Peucker algorithm, and the principle is shown in FIG. 5;
(a) a straight line AB is connected between the head point A and the tail point B of the curve, and the straight line is a chord of the curve;
(b) obtaining a point C with the maximum distance from the straight line segment on the curve, and calculating the distance d between the point C and the AB;
(c) the distance is compared with a predetermined threshold value threshold, and if the distance is less than the threshold value threshold, the straight line segment is used as an approximation of a curve, and the curve segment is processed.
(d) If the distance is larger than the threshold value, C is used for dividing the curve into two sections of AC and BC, and 1-3 processing is carried out on the two sections of chords respectively.
(e) When all the curves are processed, the broken lines formed by all the dividing points are connected in sequence, and the broken lines can be used as the approximation of the curves.
(5) Coordinate determination by fitting
Through the steps, the minimum fitting rectangle containing the light spots can be obtained, and the minimum fitting rectangle is output as a Rect variable, which is a data type in Opencv and contains member variables (x, y) (the vertex at the upper left corner of the rectangle), width (the width of the rectangle) and height (the height of the rectangle), wherein the coordinate of the center point of the rectangle is the specific position information in the laser light spots.
And the remote control terminal preliminarily processes the image data to calculate the coordinates of the laser spot center, compares the coordinates with the calculation data of the adjacent monitoring points and the datum points, and calculates the absolute position of the laser spot center.
The central position of the laser spot is displaced in the direction X, Y, and because the monitoring machine is rigidly connected with the roadbed surface, the current monitoring machine takes the center of a circle of laser emitted by the previous monitoring machine as a relative reference, so that the condition of deformation of the roadbed of the railway can be deduced from the position change of the center of the monitoring laser spot. Referring to fig. 6, Δ x represents a deformation in a horizontal direction, i.e., a landslide displacement of the railroad bed, and Δ y represents a deformation in a vertical direction, i.e., a settlement displacement of the railroad bed.
The geometric configuration of the monitoring machine grids is established on the railway sleepers, the target light sources of adjacent sections are monitored, and the monitoring points are distributed as shown in fig. 7. And measuring the relative displacement of the monitoring target among the 2 sections, and obtaining the absolute displacement of a certain monitoring point, namely the deformation information of the monitoring section in the railway roadbed through coordinate transformation and reference transmission. The intervals set by the monitoring points on the two sides of the line are as consistent as possible, so that the section deformation information can be correctly reflected.
The coordinates of the laser spot measured at each monitoring point are stored in the database in real time, and in one example, the data storage format is as shown in table 1 below:
TABLE 1 data monitoring table
| Monitoring point 1 | Monitoring point 2 | Monitoring point 3 | …… | Monitoring point n | |
| Current coordinate | (x1,y1) | (x2,y2) | (x3,y3) | …… | (xn,yn) |
| Reference coordinates | (X1,Y1) | (X2,Y2) | (X3,Y3) | …… | (Xn,Yn) |
The actual position information and the relative position information are converted as follows:
monitoring point 1: since the laser light source of the monitoring point 1 is directly obtained from the reference point, its actual position information is equal to the relative position information, i.e.:
Δx1＝ΔX1＝x1-X1
Δy1＝ΔY1＝y1-Y1
monitoring points i: relative position to actual position relationship:
Δx1＝xi-Xi
Δyi＝yi-Yi
wherein, Δ X1Actual horizontal offset (landslide displacement), Δ Y, for the ith monitoring point1The actual vertical offset (settlement displacement) of the ith monitoring point; Δ x1Is the relative horizontal offset, Δ y, of the ith monitoring point1Is the relative vertical offset of the ith monitor point.
After the conversion, the actual displacement of each monitoring point can be calculated, and several sets of current laser coordinates can be measured in order to reduce errors, and then the arithmetic mean is performed.
The remote control terminal also calculates the delta X1And Δ Y1Comparing with a set threshold value, if it exceedsAnd sending alarm information when the threshold value is exceeded, and informing related personnel to carry out field detection.
The obtained various data are stored in a database, and the remote control terminal calls the data in the database in real time to realize the real-time monitoring of the settlement of the rail subgrade.
The remote control terminal adopts terminal management methods such as track management, section management, rail management, terminal tree management, SIM card management, data management and the like, and performs management such as addition, modification, deletion, inquiry and the like on information such as lines, stations, sections, engineering geology, positioned rail numbers and the like of the rails in the system monitoring area. Meanwhile, an alarm management method is adopted, visual statistical analysis is carried out on alarm information generated after data preprocessing by the system, and real-time alarm information can be inquired and checked; meanwhile, the method is used for checking historical alarm information.
In this embodiment, the laser target plate is a circular or square target plate, or may have another shape. The CMOS adopts WAT-902H3 produced by VIEW corporation, has high reliability, stability and sensitivity, has automatic gain and noise reduction technology, and can obtain high-quality gray level images. The image transmission module is a module with stable signal, low power consumption and small volume. The image transmission module is worn with a radiating fin, so that the imaging performance of the lens is prevented from being changed due to the heat conduction problem.
The laser emitter adopts a semiconductor laser emitter with a very small divergence angle, and the small and round size of a light spot irradiated on the target plate is ensured.
The 4G transmission module selects relay equipment with a 4G data transmission function and a control function, supports various networks such as mobile/Unicom/telecom and the like, and supports network protocols such as TCP/UPD/DNS and the like.
The battery pack selects a high-capacity rechargeable lithium ion storage battery, the remote control terminal controls the working time interval of the monitoring machine through the network, so that the monitoring machine can obtain one image at intervals, or the monitoring machine is started to work when the detection is carried out every time, and the monitoring machine is closed in a normal state, so that the electric quantity consumption of the battery can be greatly reduced, and the replacement period of the battery is guaranteed to be about 3 months at least.
Furthermore, the remote control terminal is mainly responsible for image display and processing, and a portable industrial personal computer can be selected. The quality is reliable and stable, and the interface is abundant, possesses mobility and portability.
The implementation also provides a method for prolonging the battery replacement period of the roadbed settlement detection device, which specifically comprises the following steps:
s1: when the detection condition is met, the remote control terminal issues a starting-up instruction to a transmission module in the monitoring machine, and the transmission module responds to the starting-up instruction to control the output terminal of a battery assembly in the monitoring machine to be closed so as to supply power to the monitoring machine;
the detection condition is a condition or basis for triggering detection of deformation of the roadbed, and specifically may be that the remote control terminal receives a request instruction for detecting deformation of the roadbed sent by the user terminal, or that a preset time period has elapsed since the detection of deformation of the roadbed was triggered last time, which is not specifically limited herein. And the remote control terminal generates a starting instruction based on the request instruction according to the request instruction of the roadbed deformation detection of the user and sends the starting instruction to the monitoring machine. The preset time period can be customized, such as 1 day.
S2: after the power is received and started, a control assembly in the monitoring machine feeds back a starting signal to a transmission module, and the transmission module acquires a target plate image captured by an image sensing module in the monitoring machine and transmits the target plate image to a remote control terminal;
s3: the remote control terminal issues a shutdown instruction after receiving the target plate image uploaded by the transmission module, the transmission module responds to the shutdown instruction to control the output terminal of the battery assembly to be disconnected, and power supply for the image sensing module, the laser emission module and the control assembly is stopped;
s4: the monitoring machine stops working.
As a preferred example, the transmission module adopts a 4G network relay, and the 4G network relay has a command instruction function and a data transmission function; the 4G network relay interacts with the remote control terminal through a 4G-LTE network TCP/IP protocol. The data transmission function is that the monitoring machine sends the target plate image to the 4G network relay through the serial port, the 4G network relay forwards the target plate image to the remote control terminal through the network TCP/IP protocol by utilizing the data transmission function of the 4G network relay, and the remote control terminal is convenient to process and analyze the image data of the deformation condition of the railway roadbed; the instruction control function is that the remote control terminal issues a power-on/off instruction to the 4G network relay through a network TCP/IP protocol, and the 4G network relay utilizes the relay function to turn on or turn off the switch of the battery component, so that the effect of remote control is achieved.
The power output of the 4G network relay is set through the remote control terminal, so that the time interval of the monitoring machine for acquiring the images of the deformation condition of the railway roadbed is controlled, data sampling of the monitoring machine is specified to be carried out at intervals according to actual detection requirements, and the power supply of the monitoring machine is turned on/off according to the detection requirements. Under the condition that detection is not needed, the monitoring machine is closed, the electric quantity consumption of the battery is greatly reduced by reducing the working time and the standby time of the monitoring machine, the mode of replacing the primary battery manually for several days in the prior art can be changed into the mode of replacing the primary battery only for 3 months or even longer, and the labor consumption is greatly reduced.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A subgrade settlement detection device is characterized by comprising a remote control terminal and a plurality of monitoring machines arranged on sleepers; each monitoring machine comprises a transmission module, an image sensing module, a laser emission module, a control assembly and a battery assembly;
the transmission module is used for receiving a starting-up instruction issued by the remote control terminal and controlling the battery assembly to supply power to the image sensing module, the laser emission module and the control assembly according to the starting-up instruction;
after the image sensing module, the laser emission module and the control assembly are powered on, the control assembly feeds back a starting signal to the transmission module, and the transmission module collects a target plate image captured by the image sensing module and transmits the target plate image to the remote control terminal;
and the remote control terminal issues a shutdown instruction after receiving the target plate image uploaded by the transmission module, and the transmission module responds to the shutdown instruction to control the battery assembly to stop supplying power to the image sensing module, the laser emission module and the control assembly.
2. The subgrade settlement detection device of claim 1, wherein the image sensing module in each monitoring machine comprises a laser target plate and a camera aligned with the laser target plate;
the camera intermittently captures a target plate image formed on the laser target plate by laser irradiation emitted by a laser emitting module in the previous monitoring machine under the triggering of the transmission module.
3. The subgrade settlement detection device of claim 1, wherein the remote control terminal processes the received target plate image to obtain the coordinates of the laser spot center and compares the coordinates with the reference coordinates or the coordinates of the laser spot center previously collected by the same monitoring machine to obtain the offset of the laser spot center as the relative displacement between adjacent subgrade sections.
4. The subgrade settlement detection device of claim 3, wherein the method for the remote control terminal to obtain the coordinates of the laser spot center is as follows:
determining a target surface image of a laser irradiation area from the target plate image, and determining edge position information of a laser spot according to the target surface image by adopting a contour retrieval method; and determining the relative coordinate value of the center of the laser spot by adopting a method of solving the coordinate by fitting according to the edge position information of the laser spot.
5. The subgrade settlement detection device of claim 4, wherein the remote control terminal is further configured to, before determining the target surface image of the laser irradiation area from the target plate image:
and performing image preprocessing on the target plate image, wherein the image preprocessing comprises at least one or more of denoising processing, histogram equalization and thresholding processing.
6. The subgrade settlement detection device of claim 1, wherein the remote control terminal further obtains the actual settlement data of the subgrade end face corresponding to each monitoring machine by summing the offset of the laser spot center measured by a single monitoring machine and the offsets of the laser spot centers corresponding to other monitoring machines.
7. The subgrade settlement detection device of claim 1, wherein the transmission module is a 4G network relay having a command function and a data transmission function.
8. The subgrade settlement detection device of claim 7, wherein the 4G network relay interacts with a remote control terminal through a 4G-LTE network TCP/IP protocol.
9. A method for prolonging the battery replacement period of a roadbed settlement detection device is characterized by comprising the following steps:
s1: when the detection condition is met, the remote control terminal issues a starting-up instruction to a transmission module in the monitoring machine, and the transmission module responds to the starting-up instruction to control the output terminal of a battery assembly in the monitoring machine to be closed so as to supply power to the monitoring machine;
s2: after the power is received and started, a control assembly in the monitoring machine feeds back a starting signal to a transmission module, and the transmission module acquires a target plate image captured by an image sensing module in the monitoring machine and transmits the target plate image to a remote control terminal;
s3: the remote control terminal sends a shutdown instruction after receiving the target plate image uploaded by the transmission module, and the transmission module responds to the shutdown instruction to control the output terminal of the battery assembly to be disconnected and stops supplying power to the image sensing module, the laser emission module and the control assembly;
s4: the monitoring machine stops working.
10. The method of claim 9, wherein the transmission module is a 4G network relay having a command function and a data transmission function; the 4G network relay interacts with the remote control terminal through a 4G-LTE network TCP/IP protocol.
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