CN212340314U - Highway subgrade disease monitoring devices based on OFDR - Google Patents
Highway subgrade disease monitoring devices based on OFDR Download PDFInfo
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Abstract
The utility model discloses a highway subgrade disease monitoring devices based on OFDR, this system includes that the road bed subsides optical fiber sensing device, road bed level deformation optical fiber sensing device, bridge foundation pile warp optical fiber sensing device, water level variation and precipitation optical fiber sensing device, OFDR optical fiber data acquisition and transmission device, on-the-spot road conditions monitoring devices, solar energy power supply and data transmission device, OFDR optical fiber data processing and analysis device, wavelet processing and noise reduction device, monitoring results display device, cloud platform data management and early warning device and remote receiving device; the utility model discloses carry out real-time acquisition and transmission to OFDR optical fiber data, rethread optical fiber data processing system obtains the road bed settlement difference, horizontal displacement, foundation pile developments response of meeting an emergency, precipitation, ground water level and river water level information to the chart display compares with the early warning value after cloud platform data management and early warning device, in time seeks the disease processing scheme, has realized remote monitoring and in time handles in the monitoring result display device.
Description
Technical Field
The utility model relates to a monitoring devices especially relates to a highway subgrade disease monitoring devices based on OFDR.
Background
Roadbed deformation such as settlement and horizontal displacement of roadbed slopes are one of the most common diseases of the expressway with traffic, driving safety accidents are caused under severe conditions, and the annual maintenance and treatment cost is high.
Traditional road bed deformation monitoring system adopts to bury underground subsides sign, deviational survey pipe, axle power meter mode more, monitors to road bed subsides, horizontal displacement and embankment or bridge foundation pile deformation, has that work load is big, need personnel's cooperation, easily receives weather factor influence, the low shortcoming of monitoring precision, can not acquire the deformation characteristic of road bed comprehensively.
How to conveniently and effectively adopt a special monitoring device to carry out deformation on the highway under the action of dynamic load, especially how to realize cooperative deformation of monitoring equipment and a roadbed and accurately monitor displacement change becomes a hotspot and difficulty of research in the engineering field.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model provides a highway subgrade disease monitoring devices based on OFDR to the monitoring facilities who solves among the prior art can not be out of shape with the road bed together in coordination, is difficult to the parameter that accurate monitoring includes that the road bed subsides, the displacement change that horizontal deformation, bridge foundation pile warp, water level information lead to the subgrade disease, and carries out the technical problem of early warning.
The technical scheme is as follows: the utility model discloses highway subgrade disease monitoring devices based on OFDR, including subgrade settlement fiber sensing device, subgrade horizontal deformation fiber sensing device, bridge foundation pile deformation fiber sensing device, water level variation and precipitation fiber sensing device, OFDR fiber data acquisition and transmission device, on-the-spot road conditions monitoring devices, solar energy power supply and data transmission device, OFDR fiber data processing and analytical equipment, wavelet processing and noise reduction device, monitoring result display device, cloud platform data management and early warning device and remote receiving device;
the roadbed settlement optical fiber sensing device comprises a geogrid, and a strain optical fiber and a temperature compensation optical fiber which are arranged on the geogrid;
the roadbed horizontal deformation optical fiber sensing device comprises a soil body inclinometer pipe, and a strain optical fiber, a temperature compensation optical fiber and a self-heating optical fiber temperature sensor which are arranged in the inclinometer pipe;
the bridge foundation pile deformation optical fiber sensing device comprises a cast-in-place pile, and a strain optical fiber and a temperature compensation optical fiber which are arranged on the cast-in-place pile;
the water level change and precipitation optical fiber sensing device comprises a water level monitoring device and a precipitation monitoring device which are provided with self-heating optical fiber temperature sensors;
the solar power supply and data transmission device wirelessly transmits live monitoring of the on-site road condition monitoring device to the cloud platform data management and early warning device, and transmits data acquired by the OFDR optical fiber data acquisition and transmission device to the OFDR optical fiber data processing and analysis device; the OFDR optical fiber data processing and analyzing device analyzes and converts the optical fiber wavelength into strain and temperature information, and transmits the data after temperature compensation to the wavelet processing and noise reduction device for noise reduction; the monitoring result display device obtains information causing roadbed diseases and transmits the information to the cloud platform data management and early warning device in a chart form; the cloud platform data management and early warning device compares the data with a preset value for early warning, and transmits the optical fiber monitoring result and the road condition monitoring information to the corresponding remote receiving device.
The OFDR optical fiber data acquisition and transmission device comprises a dynamic data acquisition module, a data classification and packaging module and a remote parameter setting module.
The on-site road condition monitoring device comprises a camera module, a camera module and a speed measuring module.
The precipitation monitoring device comprises a rainwater collection module and a precipitation monitoring module.
The solar power supply and data transmission device comprises a solar power generation module, a voltage stabilization and transformation module and a wireless data transmission module.
The OFDR optical fiber data processing and analyzing device comprises a computer processing core module, a wireless data receiving module, a data export module and a power supply module; the computer processing core module comprises a temperature compensation processing module, a settlement data processing module, a horizontal displacement data processing module, a pile foundation vertical deformation processing module, a pile foundation horizontal deformation processing module and a pile foundation axial force processing module.
The cloud platform data management and early warning device comprises a data receiving module, a wireless data transmission module, a chart display module, an information base module, an early warning module and a power supply module; the information base module comprises a monitoring data storage and updating module, a road section responsible person information storage and calling module, a processing scheme storage and calling module, an information storage and calling module and a cooperation department information storage and calling module.
The remote receiving device comprises a worker receiving device and an police receiving device, wherein the worker receiving device and the police receiving device respectively comprise a data receiving module, a chart display module, an early warning module and a power supply module;
wherein, the graph display module of the worker receiving device displays road condition information, and the early warning module carries out early warning on deformation of a roadbed and rapid change of a water level; the method comprises the following steps that a chart display module of an police receiving device displays vehicle illegal information, and an early warning module carries out early warning on water level rapid change, road surface collapse and landslide disasters; the early warning module comprises an early warning value setting module, a monitoring data and early warning value comparison module and an alarm module.
The working principle is as follows: the OFDR (optical frequency Domain reflection) optical fiber sensing technology has the characteristics of high precision and interference resistance, and is widely applied to the fields of civil engineering, water conservancy and traffic, geological engineering and aerospace engineering.
The utility model discloses a monitoring devices monitors pile foundation under pier, pile foundation highway subgrade pile foundation under the embankment, specifically does, and the optical frequency domain reflection OFDR technique that unites two into one with transmission and sensing medium is applied to the subgrade and warp the monitoring in, makes its and the subgrade warp in coordination and the accurate monitoring if the subgrade subsides, the horizontal deformation, the displacement change of bridge foundation pile deformation class, water level information leads to the parameter of subgrade disease. The technology is based on a frequency modulation continuous wave technology of a pulse radar, two beams of coherent light are incident into an optical fiber, then the detection light and the intrinsic light interfere at a receiving end, if the phase of an optical signal is changed or modulated due to the change of test environment parameters, the detection signal of the signal detection end is changed, and the interference light is demodulated to obtain the specific information of the optical fiber to be detected. The strain resolution reaches 1.0 mu epsilon, the temperature resolution reaches 0.12 ℃, and the measurement range reaches +/-30000 mu epsilon and minus 270-900 ℃. In the monitoring system, optical fiber sensors are arranged on geogrids, soil body inclinometer pipes and foundation pile reinforcement cage main reinforcements, the geogrids are arranged in a roadbed surface layer, a base layer and a foundation soil layer according to the standard requirement, and the soil body inclinometer pipes are symmetrically arranged on two sides of a roadbed; the dynamic load of the automobile causes the settlement and horizontal deformation of the roadbed, correspondingly drives the deformation of the geogrid, the inclinometer pipe and the foundation pile, and further drives the deformation of the optical fiber sensor, so that the monitoring of the deformation of the roadbed is realized; the heating wire in the self-heating optical fiber temperature sensor generates heat under the action of constant current at rated power, the temperature of the optical fiber changes, and the rate of the temperature change of the optical fiber in the air is far greater than that of the water in a certain period of time, so that the rate of the temperature change of the optical fiber at different depths after the optical fiber is heated by the self-heating optical fiber temperature sensor can be used for judging the water level, and the water level can be monitored; the on-site road condition monitoring device carries out real-time road condition monitoring and vehicle information monitoring; meanwhile, the dynamic monitoring and the remote monitoring of the road surface deformation are realized by utilizing an automatic acquisition device and a remote data transmission technology.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
(1) the OFDR is combined with an automatic acquisition system and a remote data transmission technology, and the OFDR and a roadbed cooperatively deform and accurately monitor displacement change and water level change, so that dynamic automatic remote monitoring and early warning are realized;
(2) the utility model discloses an automatic data is handled in the collection and shows in the cell-phone with the chart form and remove the end, and carries out the early warning to the deformation disease, in time seeks the disease processing scheme, reaches remote monitoring and the purpose of in time handling.
(3) The utility model discloses a scene road conditions monitoring devices and traffic police department's cooperation record vehicle illegal information prevent the road damage that the traffic accident caused.
(4) The utility model discloses data collection is comprehensive, human error is little, anti-electromagnetic interference, sensitivity are high, has realized that the highway subgrade under the dynamic loading effect warp remote monitoring, early warning and timely disease treatment in advance.
Drawings
Fig. 1 is a schematic view of the monitoring device of the present invention;
fig. 2 is a cross-sectional view of the arrangement of the geogrids and inclinometer pipes on the longitudinal section of the roadbed of the utility model;
fig. 3 is a plan view of the geogrid layout of the present invention;
FIG. 4 is a schematic view of the fiber arrangement on the longitudinal section of the bridge foundation pile of the present invention;
FIG. 5 is a schematic view of the fiber arrangement on the cross section of the bridge foundation pile of the present invention;
FIG. 6 is a schematic view of the optical fiber layout of the river water level monitoring device of the present invention;
fig. 7 is the utility model discloses precipitation monitoring devices optic fibre lays the sketch map.
Detailed Description
As shown in fig. 1, the utility model discloses highway subgrade disease monitoring devices based on OFDR includes that the road bed subsides optical fiber sensing device, road bed level deformation optical fiber sensing device, bridge foundation pile warp optical fiber sensing device, level variation and precipitation optical fiber sensing device, OFDR optical fiber data acquisition and transmission device 7, on-the-spot road conditions monitoring devices 8, solar energy power supply and data transmission device 11, OFDR optical fiber data processing and analytical equipment 12, wavelet processing and noise reduction device 13, monitoring result display device 14, cloud platform data management and early warning device 15 and remote receiving device 16.
The roadbed settlement optical fiber sensing device comprises a geogrid 2, and a strain optical fiber 1a and a temperature compensation optical fiber 1b which are arranged on the geogrid.
The roadbed horizontal deformation optical fiber sensing device comprises a soil body inclination measuring pipe 4, a strain optical fiber 1a, a temperature compensation optical fiber 1b and a self-heating optical fiber temperature sensor 1d, wherein the strain optical fiber 1a, the temperature compensation optical fiber 1b and the self-heating optical fiber temperature sensor are arranged in the inclination measuring pipe.
The bridge foundation pile deformation optical fiber sensing device comprises a cast-in-place pile, and a strain optical fiber 1a and a temperature compensation optical fiber 1b which are arranged on the cast-in-place pile.
The water level change and precipitation optical fiber sensing device comprises a water level monitoring device 10 and a precipitation monitoring device 9 which are provided with self-heating optical fiber temperature sensors 1 d.
The OFDR optical fiber data acquisition and transmission device 7 comprises a dynamic data acquisition module, a data classification and packaging module and a remote parameter setting module; the on-site road condition monitoring device 8 comprises a camera module, a camera module and a speed measuring module; the precipitation monitoring device 9 comprises a rainwater collection module and a precipitation monitoring module; the solar power supply and data transmission device 11 comprises a solar power generation module 11a, a voltage stabilization and transformation module 11b and a wireless data transmission module 11c, wherein a solar power generation panel is connected with the voltage stabilization and transformation device and continuously supplies power for the wireless data transmission module, the OFDR optical fiber data acquisition and transmission device and the on-site road condition monitoring device for a long time after voltage stabilization and transformation.
The OFDR optical fiber data acquisition and transmission device is characterized in that a jumper wire of the OFDR optical fiber data acquisition and transmission device is connected with a strain optical fiber and a temperature compensation optical fiber, related parameters are set remotely, and after the original data are acquired, the data are packaged according to the settlement, horizontal displacement and pile foundation deformation parameters of a monitoring system to which the original data belong and are transmitted to the OFDR optical fiber data processing and analysis device in a wireless mode; the OFDR optical fiber data processing and analyzing device receives data sent by the OFDR optical fiber data acquisition and transmission device, analyzes the wavelength of the distributed optical fiber and converts the wavelength into strain information and temperature information, performs temperature compensation on optical fiber monitoring data corresponding to the temperature compensation optical fiber monitoring data, and then transmits the signal to the wavelet processing and noise reduction device; the wavelet processing and denoising device receives data sent by the OFDR optical fiber data processing and analyzing device, performs wavelet processing to achieve the purpose of denoising, and transmits the data to the monitoring result display device; the monitoring result display device obtains information of roadbed diseases caused by settlement, horizontal displacement, underground water level and precipitation of the roadbed through processing, displays the information in a chart and transmits the information to the cloud platform data management and early warning device; the cloud platform data management and early warning device compares data with a preset value to realize early warning, and transmits information to the worker side remote receiving device and the police side remote receiving device according to different alarm types: when the road condition has a problem, wirelessly transmitting the monitoring result, whether the processing is needed and the processing scheme information to a remote receiving device; the remote receiving device receives the results sent by the monitoring result display device, displays the results in a chart form, alarms in a sound and image form when the early warning standard is reached, displays the processing scheme and the information of the contact way of the construction unit related to the scheme, monitors the deformation condition of the roadbed of the active expressway and processes the deformation condition in time; when the on-site road condition monitoring device monitors illegal information of the overspeed vehicle or road surface collapse and landslide disasters, the corresponding traffic police cooperation department in the information base module is called, and the illegal information of the vehicle is sent to the traffic police cooperation department.
The OFDR optical fiber data processing and analyzing device 12 comprises a computer processing core module, a wireless data receiving module, a data exporting module and a power supply module; the computer processing core module comprises a temperature compensation processing module, a settlement data processing module, a horizontal displacement data processing module, a pile foundation vertical deformation processing module, a pile foundation horizontal deformation processing module and a pile foundation axial force processing module. The wavelet processing and denoising apparatus 13 includes a computer processing module, a data receiving module, and a power supply module, wherein the computer processing module includes a wavelet processing module, a denoising module, an image generating module, and a power supply module. The monitoring result display device 14 comprises a data receiving module, a data chart processing module, a wireless data transmission module and a power supply module. The cloud platform data management and early warning device 15 comprises a data receiving module, a wireless data transmission module, a chart display module, an information base module, an early warning module and a power supply module; the information base module comprises a monitoring data storage and updating module, a road section principal information storage and calling module, a processing scheme storage and calling module, a related construction unit information storage and calling module and a cooperative traffic police department information storage and calling module. The remote receiving device 16 comprises a worker receiving device and an police receiving device, and both comprise a data receiving module, a chart display module, an early warning module and a power supply module. Wherein, the graph display module of the worker receiving device displays road condition information, and the early warning module carries out early warning on deformation of a roadbed and rapid change of a water level; the chart display module of the police receiving device displays vehicle illegal information, and the early warning module carries out early warning on water level rapid change, road surface collapse and landslide disasters. The early warning module comprises an early warning value setting module, a monitoring data and early warning value comparison module and an alarm module.
As shown in fig. 2, 3, 4, 5, 6 and 7, a plurality of U-shaped grooves are symmetrically formed in the side wall of the soil body inclinometer pipe, a plurality of honeycomb-shaped holes are formed in the bottom of the inclinometer pipe to monitor the change of the ground water level, the strain optical fibers 1a and the temperature compensation optical fibers 1b are arranged on the geogrid 2 along the geogrid grid, the strain optical fibers and the temperature compensation optical fibers are arranged on the soil body inclinometer pipe 4 along the grooves in the inner wall of the inclinometer pipe, and the strain optical fibers and the temperature compensation optical fibers are arranged on the side faces of the main ribs along the main ribs of the reinforcement cage 6; the self-heating optical fiber temperature sensor 1d is arranged on the surfaces of the soil body inclinometer pipe 4, the inner wall of the precipitation monitoring device 9 and the river water level monitoring device 10 along the groove of the inner wall of the inclinometer pipe.
The strain optical fiber, the temperature compensation optical fiber and the self-heating optical fiber temperature sensor are connected with an OFDR optical fiber data acquisition and transmission device 7 through an optical fiber lead 1 c; the OFDR optical fiber data acquisition and transmission device 7 and the field road condition monitoring device 8 are powered by a solar power supply and data transmission device 11; the solar power supply and data transmission device 11 wirelessly transmits the live monitoring of the on-site road condition monitoring device 8 to the cloud platform data management and early warning device 15; the OFDR optical fiber data acquisition and transmission device 7 automatically acquires monitoring data and transmits the monitoring data to the solar power supply and data transmission device 11 in a classified and packaged manner according to different test objects such as settlement, horizontal displacement and pile foundation, and the solar power supply and data transmission device 11 wirelessly transmits the data acquired by the OFDR optical fiber data acquisition and transmission device 7 to the OFDR optical fiber data processing and analysis device 12; the OFDR optical fiber data processing and analyzing device 12 receives data sent by the solar power supply and data transmission device 11; the output end of the OFDR optical fiber data processing and analyzing device 12 is connected with a wavelet processing and noise reducing device 13; the wavelet processing and denoising device 13 is connected with a monitoring result display device 14; the monitoring result display device 14 remotely transmits the processed result to the cloud platform data management and early warning device; the cloud platform data management and early warning device 15 remotely transmits the optical fiber monitoring result and road condition live monitoring to the corresponding remote receiving device 16; the remote receiving device 16 displays the monitoring result and the processing scheme information in a graph form.
Wherein the strain optical fiber 1a, the temperature compensation optical fiber 1b and the self-heating optical fiber temperature sensor 1d are all PE optical fibers, lc is an optical fiber exposed above the road surface, and a protective sleeve 17 is required to be added for protection; the geogrid 2 is arranged in a surface layer 3a, a base layer 3b and a soil layer 3c of a roadbed to realize omnibearing monitoring and early warning, soil body inclinometer pipes 4 are symmetrically arranged on two sides of the roadbed to monitor horizontal displacement of the roadbed, a reinforcement cage 6 is poured into foundation piles 5 through concrete, a precipitation monitoring device 9 is horizontally fixed beside a road, and a river water level monitoring device 10 is fixed on a central river bed; the solar power generation panel 11a is connected with the voltage stabilizing and transforming device 11b, and is connected with the wireless data transmission module 11c, the OFDR optical fiber data acquisition and transmission device 7 and the on-site road condition monitoring device 8 for long-term stable power supply after voltage stabilization and transformation.
The OFDR optical fiber data acquisition and transmission device 7 adopts an optical fiber dynamic data acquisition instrument based on an OFDR technology and is provided with an automatic data acquisition function, a remote parameter setting function and a data classification and packaging function; the OFDR optical fiber data acquisition and transmission device 7 acquires optical fiber monitoring data, and the field road condition monitoring device 8 acquires road condition and vehicle information; the wireless data transmission module 11c wirelessly transmits the acquired optical fiber monitoring data to the OFDR optical fiber data processing and analyzing device 12, and wirelessly transmits road condition and vehicle information to the cloud platform data management and early warning device 15; the OFDR optical fiber data processing and analyzing device 12 automatically judges the position of the monitored object according to the characteristics of the optical fiber data, extracts related data, converts the data into strain information and temperature information, performs temperature compensation on strain, performs different processing according to the difference of the monitored object, and converts the strain information and the temperature information into required data; a wavelet processing and denoising device 13 for smoothing and denoising the data; a monitoring result display device 14 for displaying the processed optical fiber data in a visual form such as a graph; the cloud platform data management and early warning device 15 compares the monitoring data with an early warning value and sends the monitoring data to a remote receiving device 16 of a road segment responsible person or a cooperative traffic police department; the remote receiving device 16 displays the data recorded by the monitoring result display device 14 on the mobile phone in a form of a chart, so as to achieve the monitoring effect.
The utility model discloses highway subgrade disease monitoring devices's monitoring method based on OFDR is as follows:
(1) arranging a strain optical fiber 1a and a temperature compensation optical fiber 1b on the front surface of the grid of the geogrid 2; and binding the grid by using a binding tape, straightening the strain optical fiber 1a during binding, and applying no acting force on the temperature compensation optical fiber 1 b. Arranging a strain optical fiber 1a and a temperature compensation optical fiber 1b in a groove on the inner wall of the inclinometer 4; the optical fiber is fixed on the inner wall of the inclinometer tube 4 by using an epoxy resin adhesive, and the strain optical fiber 1a is stretched straight during fixing, so that no acting force is applied to the temperature compensation optical fiber 1 b. The strain optical fiber 1a and the temperature compensation optical fiber 1b are respectively arranged on the side surfaces of two main bars of a reinforcement cage 6 in a cast-in-place pile 5 in a U-shaped manner, adjacently and symmetrically, so that the damage of grouting to the sensing optical fiber is reduced; and binding the stirrup of the reinforcement cage by using a binding tape, straightening the strain sensing optical fiber 1a during binding, and applying no acting force on the temperature compensation optical fiber 1 b.
(2) Fixing the self-heating optical fiber temperature sensor 1d into the rigid protective sleeve 17 to prevent the damage caused by external factors, and then fixedly bonding the self-heating optical fiber temperature sensor on the inner wall groove of the inclinometer 4, the inner wall of the precipitation monitoring device 9 and the surface of the river water level monitoring device 10 by using epoxy resin, and keeping the self-heating optical fiber temperature sensor vertical to the horizontal ground during fixing; a honeycomb-shaped hole is punched at the lower part of the inclinometer pipe, so that underground water can enter the hole conveniently and the self-heating optical fiber temperature sensor 1d can be monitored conveniently, and the optical fiber arrangement position is avoided during punching, so that the strength of the inclinometer pipe is prevented from being damaged, and the inclinometer pipe is convenient to use for a long time.
(3) Leveling a foundation soil layer, and laying the geogrid 2 provided with the strain optical fibers 1a and the temperature compensation optical fibers 1b on a leveled field to enable the geogrid 2 to be tightly attached to the field, so that the geogrid and a soil body are ensured to be deformed in a coordinated manner; and after paving, filling, leveling and rolling are carried out in time. And selecting the layout point positions of the inclinometer pipes on two sides of the roadbed, symmetrically arranging the inclinometer pipes with a gap, vertically driving the inclinometer pipes 4 into the roadbed, wherein one side provided with the optical fiber sensor faces the road. And (5) putting the reinforcement cage 6 into the drill hole, pouring concrete after protecting the optical fiber sensor, and curing to form the cast-in-place pile 5. The rainfall monitoring device 9 is horizontally fixed beside a road, the river water level monitoring device 10 is fixed on a central river bed, and the two devices are both arranged in the camera shooting range of the on-site road condition monitoring device 8 so as to be convenient for comparison and inspection with on-site images and monitoring data. The three optical fibers are respectively reserved with set lengths so as to be connected with the optical fiber data automatic acquisition device 7 in the later period. In the construction process, the reserved optical fiber is protected by a protective sleeve, and the optical fiber is prevented from being damaged in the soil filling, leveling and grouting processes.
(4) Connecting an OFDR optical fiber data acquisition and transmission device 7 and a field road condition monitoring device 8 with a solar power supply and data transmission device 11, and testing the timeliness and effectiveness of monitoring by the field road condition monitoring device 8; after roadbed filling and pile foundation maintenance are finished, the strain optical fiber 1a, the temperature compensation optical fiber 1b and the self-heating optical fiber temperature sensor 1d extending out of the roadbed are respectively welded with a jumper wire, a thermal expansion pipe is added at the optical fiber welding position to increase rigidity and durability, the optical fiber is connected into different channels of an OFDR optical fiber data acquisition and transmission device 7 according to the settlement of a monitoring system, horizontal displacement, pile foundation deformation and water level distribution after welding, the connectivity of a circuit is tested, relevant parameters are set, and data are subjected to trial acquisition to determine the validity of the data.
(5) The field road condition monitoring device 8 transmits monitored real-time road conditions and vehicle information to the solar power supply and data transmission device 11, the solar power supply and data transmission device 11 wirelessly transmits the real-time road conditions and the vehicle information to the cloud platform data management and early warning device 15, and the cloud platform data management and early warning device 15 judges and early warns existing landslide road conditions and vehicle illegal information;
(6) the optical fiber data automatic acquisition device 7 acquires data, packages the data according to categories and transmits the data to the solar power supply and data transmission device 11, the solar power supply and data transmission device 11 sends the data to the OFDR optical fiber data processing and analyzing device 12, the system carries out automatic extraction processing on the optical fiber data and transmits the optical fiber data to the wavelet processing and noise reduction device 13, the wavelet processing and noise reduction device 13 carries out smoothing and noise reduction on the data and displays the data in the monitoring result display device 14, and after strain data are obtained, the strain data are converted into soil body settlement difference, roadbed horizontal displacement and water level related information according to a formula.
(7) The monitoring result display device transmits data to the cloud platform data management and early warning device 15, the cloud platform data management and early warning device 15 compares the data with a preset early warning value, and transmits the monitoring result, the real-time road condition and the vehicle information to different remote receiving devices 16 of a worker, a police and a disaster emergency processing department according to the contact way of a road section person in charge or a cooperative traffic police department recorded in a database;
(8) the remote receiving device 16 receives the result remotely transmitted by the cloud platform data management and early warning device 15, and displays the result on the screen in a graph form.
Claims (8)
1. The utility model provides a highway subgrade disease monitoring devices based on OFDR which characterized in that: the system comprises a roadbed settlement optical fiber sensing device, a roadbed horizontal deformation optical fiber sensing device, a bridge foundation pile deformation optical fiber sensing device, a water level change and precipitation optical fiber sensing device, an OFDR optical fiber data acquisition and transmission device (7), an on-site road condition monitoring device (8), a solar power supply and data transmission device (11), an OFDR optical fiber data processing and analysis device (12), a wavelet processing and noise reduction device (13), a monitoring result display device (14), a cloud platform data management and early warning device (15) and a remote receiving device (16);
the roadbed settlement optical fiber sensing device comprises a geogrid (2), and a strain optical fiber and a temperature compensation optical fiber which are arranged on the geogrid;
the roadbed horizontal deformation optical fiber sensing device comprises a soil body inclinometer pipe (4), and a strain optical fiber, a temperature compensation optical fiber and a self-heating optical fiber temperature sensor which are arranged in the inclinometer pipe;
the bridge foundation pile deformation optical fiber sensing device comprises a cast-in-place pile, and a strain optical fiber and a temperature compensation optical fiber which are arranged on the cast-in-place pile;
the water level change and precipitation optical fiber sensing device comprises a water level monitoring device (10) and a precipitation monitoring device (9), wherein the water level monitoring device is provided with a self-heating optical fiber temperature sensor;
the solar power supply and data transmission device wirelessly transmits live monitoring of the on-site road condition monitoring device to the cloud platform data management and early warning device, and transmits data acquired by the OFDR optical fiber data acquisition and transmission device to the OFDR optical fiber data processing and analysis device; the OFDR optical fiber data processing and analyzing device analyzes and converts optical fiber wavelength into strain and temperature information, transmits the data after temperature compensation to the wavelet processing and noise reduction device for noise reduction, the monitoring result display device obtains information causing roadbed damage and transmits the information to the cloud platform data management and early warning device in a chart form, the cloud platform data management and early warning device compares the data with a preset value for early warning, and transmits the optical fiber monitoring result and road condition monitoring information to the corresponding remote receiving device (16).
2. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the OFDR optical fiber data acquisition and transmission device comprises a dynamic data acquisition module, a data classification and packaging module and a remote parameter setting module.
3. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the on-site road condition monitoring device comprises a camera module, a camera module and a speed measuring module.
4. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the precipitation monitoring device comprises a rainwater collection module and a precipitation monitoring module.
5. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the solar power supply and data transmission device comprises a solar power generation module (11a), a voltage stabilization and transformation module (11b) and a wireless data transmission module (11 c).
6. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the OFDR optical fiber data processing and analyzing device comprises a computer processing core module, a wireless data receiving module, a data export module and a power supply module; the computer processing core module comprises a temperature compensation processing module, a settlement data processing module, a horizontal displacement data processing module, a pile foundation vertical deformation processing module, a pile foundation horizontal deformation processing module and a pile foundation axial force processing module.
7. The OFDR-based highway subgrade disease monitoring device according to claim 1, wherein: the cloud platform data management and early warning device comprises a data receiving module, a wireless data transmission module, a chart display module, an information base module, an early warning module and a power supply module; the information base module comprises a monitoring data storage and updating module, a road section responsible person information storage and calling module, a processing scheme storage and calling module, an information storage and calling module and a cooperation department information storage and calling module.
8. The OFDR-based highway subgrade disease monitoring device according to any one of claims 1-7, wherein: the remote receiving device comprises a worker receiving device and an police receiving device, wherein the worker receiving device and the police receiving device respectively comprise a data receiving module, a chart display module, an early warning module and a power supply module;
wherein, the graph display module of the worker receiving device displays road condition information, and the early warning module carries out early warning on deformation of a roadbed and rapid change of a water level; the method comprises the following steps that a chart display module of an police receiving device displays vehicle illegal information, and an early warning module carries out early warning on water level rapid change, road surface collapse and landslide disasters;
the early warning module comprises an early warning value setting module, a monitoring data and early warning value comparison module and an alarm module.
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| CN202021308488.1U CN212340314U (en) | 2020-07-07 | 2020-07-07 | Highway subgrade disease monitoring devices based on OFDR |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023009889A1 (en) * | 2021-07-30 | 2023-02-02 | Tensar International Corporation | System and method for detecting subgrade deformation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023009889A1 (en) * | 2021-07-30 | 2023-02-02 | Tensar International Corporation | System and method for detecting subgrade deformation |
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