CN210110029U - Distributed online monitoring device for frozen soil layer temperature field - Google Patents
Distributed online monitoring device for frozen soil layer temperature field Download PDFInfo
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- CN210110029U CN210110029U CN201922373591.8U CN201922373591U CN210110029U CN 210110029 U CN210110029 U CN 210110029U CN 201922373591 U CN201922373591 U CN 201922373591U CN 210110029 U CN210110029 U CN 210110029U
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Abstract
The utility model relates to a distributing type frozen soil layer temperature field on-line monitoring device, including temperature field temperature measurement cable, temperature acquisition module, system low power consumption management module and data transmission module, temperature field temperature measurement cable includes temperature measurement cable and oil pipeline, temperature acquisition module and temperature measurement cable junction, data transmission module includes DTU module, DTU network basic station, surveillance center and integration monitoring base station, and integration monitoring base station is connected with DTU network basic station, and DTU network basic station is connected with the surveillance center, system low power consumption management module includes power supply management subassembly and lithium cell, and the lithium cell is connected with the power supply management subassembly. The utility model discloses a temperature measurement cable through adopting the field bus type carries out real-time temperature on-line monitoring to the different degree of depth of frozen soil layer and surveyed the structure like oil pipeline, railway foundation etc. obtains the peripheral frozen soil layer temperature field of being surveyed the structure.
Description
Technical Field
The utility model relates to a building technical field, more specifically say, relate to a distributing type frozen soil layer temperature field on-line monitoring device.
Background
Frozen soil refers to various rocks and soils that are below zero degrees centigrade and contain ice. Frozen earth has rheological properties and its long-term strength is much lower than the transient strength characteristics. Due to these characteristics, the construction of engineering structures in frozen soil areas must face two major risks: frost heaving and thaw sinking. Therefore, engineering construction in frozen soil areas, such as railways, petroleum pipelines, etc., requires monitoring of the state of frozen soil, especially the temperature of frozen soil layers. For example, due to seasonal changes or the temperature of the pipeline, a melting ring is formed around the railway or oil pipeline, so that water is discharged when the frozen soil is melted and collapsed, the supporting force of the frozen soil on the roadbed or the pipeline is reduced, the pipeline is settled, and once the frozen soil is seriously thawed and collapsed, the recovery is difficult, the operation safety of the railway or the pipeline is greatly influenced, because the frozen soil is a medium which is very sensitive to temperature changes, and the phenomena of the frozen soil, the frozen soil and the thawing and the like are mostly generated from the temperature. The most problems of the existing frozen soil layer temperature measurement are high cost, large-scale popularization cannot be realized, especially, the fiber grating type thermometer measurement is adopted, the system cost is not only a sensor and equipment, but also the light path protection of the whole fiber grating needs to be considered, after the damage occurs, the replacement is very inconvenient, finally, the power consumption of the whole system is higher, the requirement of the whole system on power supply is higher, RTU valve chambers need to be configured at equal intervals in a monitoring interval for providing energy and system control, under the condition that the valve chamber is powered off, the equipment and accessories such as a fiber demodulator, a liquid crystal screen, a communication port and the like in the valve chamber can be frequently frozen, the maintenance cost is high, and the influence on the data of the whole monitored object cannot be estimated, the utility model discloses a new solution is proposed to above problem.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a distributing type frozen soil layer temperature field on-line monitoring device to solve the technical problem who mentions in the background art.
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides a distributing type frozen soil layer temperature field on-line monitoring device, includes temperature field temperature measurement cable, temperature acquisition module, system low power consumption management module and data transmission module, temperature field temperature measurement cable includes temperature measurement cable and oil pipeline, temperature acquisition module and temperature measurement cable junction, data transmission module includes DTU module, DTU network basic station, surveillance center and integration monitoring base station, and integration monitoring base station is connected with DTU network basic station, and DTU network basic station is connected with the surveillance center, system low power consumption management module includes power supply management subassembly and lithium cell, and the lithium cell is connected with the power supply management subassembly.
Preferably, the temperature measuring cable is installed in the frozen soil layer through a cable duct.
In any of the above schemes, preferably, the integrated monitoring base station is connected with a support assembly, the support assembly includes an anti-freezing pulling-out ground foundation and an above-ground foundation, and the anti-freezing pulling-out ground foundation and the above-ground foundation are connected with the integrated monitoring base station.
In any of the above schemes, preferably, the temperature acquisition module includes a temperature sensor, a temperature switch, a power driving module, a resistive power heating element, a 1-wire driver, a microcontroller, an RS485 driver, and a Nandflash, which are connected in sequence.
In any of the above schemes, preferably, the power supply management assembly includes a solar panel and a power management module, and the solar panel is connected to the lithium battery through the power management module.
In any of the above solutions, it is preferable that the microcontroller redundantly backs up data into the Nandflash.
In any of the above schemes, preferably, the temperature acquisition module reads the data of the frozen soil layer temperature through the temperature measuring cable in real time and sends the data to the monitoring center through the DTU module and the DTU network base station.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a temperature measurement cable through adopting the field bus type to the different degree of depth of frozen soil layer and surveyed the structure like oil pipeline, real-time temperature on-line monitoring is carried out to railway foundation etc, obtain the peripheral frozen soil layer temperature value of being surveyed the structure, can judge in advance according to frozen soil layer's temperature field variation tendency and be surveyed the melting circle or melt the heavy condition of frozen soil layer cross-section, send the early warning in advance, and the pertinence harm inspection and get rid of, the control to the risk source has reached real time, unmanned on duty's effect, the cost of artifical inspection has also been reduced indirectly.
Drawings
FIG. 1 is a schematic view of the structure of the buried oil pipeline and the monitoring device;
FIG. 2 is a schematic structural diagram of a block diagram of a middle temperature acquisition module of the present invention;
fig. 3 is a network topology structure diagram of the distributed system of the present invention.
The reference numbers in the figures illustrate:
1. the system comprises a temperature measuring cable, 2, a temperature sensor, 3, an oil pipeline, 4, a cable pipeline, 5, an anti-freezing underground foundation, 6, an above-ground foundation, 7, a temperature acquisition module, 8, a DTU module, 9, a solar cell panel, 10, a power management module, 11, a temperature switch, 12, a power driving module, 13, a resistive power heating element, 14, a lithium battery, 15, a 1-wire driver, 16, a microcontroller, 17, an RS485 driver, 18, a Nandflash, 19, an integrated monitoring base station, 20, a DTU network base station, 21 and a monitoring center.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
Example 1:
referring to fig. 1-3, a distributed frozen soil layer temperature field online monitoring device comprises a temperature measuring cable 1, a temperature sensor 2, an oil pipeline 3, a cable pipeline 4, an anti-freezing underground foundation 5, an above-ground foundation 6, a temperature acquisition module 7, a DTU module 8, a solar cell panel 9, a power management module 10, a temperature switch 11, a power driving module 12, a resistive power heating element 13, a lithium battery 14, a 1-wire driver 15, a microcontroller 16, an RS485 driver 17, a Nandflash18, an integrated monitoring base station bus 19, a DTU network base station 20 and a monitoring center 21, wherein the temperature measuring cable 1 composed of digital temperature sensors is installed in a frozen soil layer through the cable pipeline 4, and temperature data of a monitored section is sent to the monitoring center 21 through the DTU module 8 through the temperature acquisition module 7; the integrated monitoring base station 19 is supported by the ground foundation 6 and the anti-freezing pulling-out ground foundation 5 to ensure the stability of the integrated monitoring base station; when the ambient temperature is lower than-10 ℃, the temperature switch 11 inside the temperature acquisition module 7 is turned on to start the power driving module 12 to provide energy for the resistive power heating element 13, so that the temperature acquisition module 7 can work normally.
The temperature acquisition module 7 reads the temperature data of the frozen soil layer through the temperature measuring cable 1 in real time and sends the data to the monitoring center 21 through the DTU module 8 and the DTU network base station 20; the integrated monitoring base station 19 is arranged above the anti-freezing underground foundation 5 and the ground foundation 6; the solar cell panel 9 supplies power to the lithium battery 14 through the power management module 10; the microcontroller 16 redundantly backs up the data into the Nandflash 18.
Example 2:
on the basis of example 1:
(1) the realization of the temperature acquisition module: the temperature acquisition module mainly comprises a microcontroller 16, a 1-wire driver 15, an RS485 driver 17, a NandFlash18, a lithium battery 14, a power management module 10, a temperature switch 11, a power driving module 12 and a resistive power heating element 13. The 1-wire driver 15 is a 1-wire type digital temperature sensor used in a dedicated drive temperature measuring cable, such as DS18B20 by meisshin corporation. The RS485 driver 17 is mainly responsible for communication with the monitoring center through the DTU module 8. The Nandflash18 is used as a data redundancy backup of the temperature acquisition module 7, when the wireless communication network fails, the microcontroller 16 can locally store the data which is not uploaded and stamp the data with a time stamp, and after the network is recovered, the data which is not uploaded before is retransmitted. Microcontroller 16 may be implemented as a low power type single chip microcomputer from TI corporation, such as MSP430F1xx series. The power management module 10 may employ MAX1555 by meixin corporation, which supports an external 5V solar panel to charge a 3.7V lithium battery. Because the temperature acquisition module 7 is internally provided with the lithium battery 14, and the lithium battery 14 generally cannot work in an environment lower than-10 ℃, a thermal feedback system consisting of the temperature switch 11, the power driving module 12 and the resistive power heating element 13 is required to ensure the local working environment temperature of the temperature acquisition module, and the working flow is as follows: when the ambient temperature of the temperature switch 11 is higher than a set temperature value, for example, -10 ℃, the temperature switch 11 is in a normally open state, and the power driving module 12 and the resistive power heating element 13 do not work. When the ambient temperature is lower than a set temperature value, such as minus 10 ℃, the temperature switch 11 is communicated with the power supply and the power driving module at the moment, the power driving module 12 drives the resistive power heating element 13 to output heat, and the ambient temperature is guaranteed to be not lower than minus 10 ℃, so that the lithium battery 14 and related elements can work normally.
(2) The technical requirements of the integrated monitoring base station are that when the ground surface is frozen and swelled, objects buried in the soil layer can be driven to move upwards, when the ground surface is melted, the soil layer is settled, and the objects buried in the soil layer cannot return to the original position because the original position is filled with surrounding soil bodies, but stay at a position higher than the original position, and the process is called a freeze-drawing effect. Under the effect of periodic frozen-out, the buried line of sensor, the basis of equipment basic station all have the risk of damage, so the basis of integration monitoring basic station 19 should have the design of anti-frozen-out, and quick-witted case rack should have waterproof, dampproofing, low temperature resistant design. The two anti-freeze measures of the system aiming at the basis of the integrated monitoring base station 19 are as follows: a. and replacing the frost heaving soil in a certain range around the underground foundation with non-frost heaving sand, pebbles, broken stones, asphalt slag, oil sand and the like. Generally, the diameter of the underground foundation is 50cm, the soil replacement and filling range is 200cm, and the depth is 50cm below the underground foundation. b. Then various heat insulating materials such as slag, glass wool products, rigid foam plastics and the like are adopted to cover the side surface of the underground foundation.
(3) The technical requirements of the temperature measuring cable are as follows: the packaging and installation of the temperature measuring element has a direct influence on the accuracy and effectiveness of system monitoring. The PUR type polyurethane flexible steel wire pipe is also the most critical and basic part of the system, the temperature measuring cable is required to have the characteristics of high strength, sealing, water resistance, aging resistance and low temperature resistance, the PUR type polyurethane flexible steel wire pipe is actually selected, the physical performance and the chemical performance of the PUR type polyurethane flexible steel wire pipe completely meet the environmental requirements, and meanwhile, the PUR software is subjected to secondary protection in an electric hard buried pipeline.
The temperature measuring cable installation process flow is as follows: the method comprises the steps of pretreatment of a structure to be detected (such as rust removal and corrosion prevention and heat preservation of a pipeline), installation of temperature measuring cables of the structure to be detected (such as a temperature sensor 2 shown in the attached drawing 1), comprehensive wiring protection in a monitoring unit (1-wire bus is buried in the ground through a special cable pipeline), installation of temperature measuring cables on the periphery of a temperature field, and construction and installation of an integrated field monitoring base station.
(4) Estimating the energy consumption of the system: the average power consumption of the system is 20mA (considering the average value of dormancy and work), the working voltage is 3.7V, and the energy loss Pa =1.776Wh is per day. The specification of 5V/1W is selected for the solar panel, and the energy which can be provided for charging the system every day is Pb =3Wh according to the effective illumination of 3 hours every day. Since Pb is greater than Pa, the energy provided by the solar panel per day completely meets the requirements of the system, but besides the normal sunshine condition, the influence of continuous rainy, snowy and rainy weather needs to be considered, so that the system is provided with a 3.7V/5Ah lithium battery, and the time that the system can run under the condition of no solar battery power supply can be calculated according to the capacity of the lithium battery 14 to be T =10 days, so that the requirements are met.
(5) The integrated monitoring base station 19 can report the temperature data set in a specified time according to the collection granularity set by the monitoring center 21, the temperature data set is stored in a database of the monitoring center 21, a temperature field real-time monitoring trend graph is drawn through special analysis software, and the risk trend of the monitored frozen soil layer is analyzed.
The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (7)
1. A distributed frozen soil layer temperature field on-line monitoring device comprises a temperature field temperature measuring cable, a temperature acquisition module (7), a system low power consumption management module and a data transmission module, it is characterized in that the temperature field temperature measuring cable comprises a temperature measuring cable (1) and an oil pipeline (3), the temperature measuring cable (1) is connected with the oil pipeline (3), the temperature acquisition module (7) is connected with the temperature measuring cable (1), the data transmission module comprises a DTU module (8), a DTU network base station (20), a monitoring center (21) and an integrated monitoring base station (19), the integrated monitoring base station (19) is connected with the DTU network base station (20), the DTU network base station (20) is connected with the monitoring center (21), the system low-power consumption management module comprises a power supply management assembly and a lithium battery (14), and the lithium battery (14) is connected with the power supply management assembly.
2. The distributed permafrost layer temperature field online monitoring device according to claim 1, characterized in that: the temperature measuring cable (1) is installed in the frozen soil layer through a cable pipeline (4).
3. The distributed permafrost layer temperature field online monitoring device according to claim 1, characterized in that: the integrated monitoring base station (19) is connected with a supporting assembly, the supporting assembly comprises an anti-freezing underground foundation (5) and an above-ground foundation (6), and the anti-freezing underground foundation (5) and the above-ground foundation (6) are connected with the integrated monitoring base station (19).
4. The distributed permafrost layer temperature field online monitoring device according to claim 1, characterized in that: the temperature acquisition module (7) comprises a temperature sensor (2), a temperature switch (11), a power driving module (12), a resistive power heating element (13), a 1-wire driver (15), a microcontroller (16), an RS485 driver (17) and a Nandflash (18) which are connected in sequence.
5. The distributed permafrost layer temperature field online monitoring device according to claim 4, characterized in that: the power supply management assembly comprises a solar cell panel (9) and a power supply management module (10), and the solar cell panel (9) is connected with a lithium battery (14) through the power supply management module (10).
6. The distributed permafrost layer temperature field online monitoring device according to claim 4, characterized in that: the microcontroller (16) redundantly backs up data into the Nandflash (18).
7. The distributed permafrost layer temperature field online monitoring device according to claim 6, characterized in that: the temperature acquisition module (7) reads the temperature data of the frozen soil layer through the temperature measuring cable (1) in real time and sends the data to the monitoring center (21) through the DTU module (8) and the DTU network base station (20).
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| CN201922373591.8U CN210110029U (en) | 2019-12-26 | 2019-12-26 | Distributed online monitoring device for frozen soil layer temperature field |
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| CN201922373591.8U CN210110029U (en) | 2019-12-26 | 2019-12-26 | Distributed online monitoring device for frozen soil layer temperature field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183903A (en) * | 2022-07-25 | 2022-10-14 | 中国科学院西北生态环境资源研究院 | Miniature single channel temperature acquisition device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183903A (en) * | 2022-07-25 | 2022-10-14 | 中国科学院西北生态环境资源研究院 | Miniature single channel temperature acquisition device |
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