CN203502585U - Wireless monitoring system for mountain landslide monitoring - Google Patents
Wireless monitoring system for mountain landslide monitoring Download PDFInfo
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- CN203502585U CN203502585U CN201320653731.7U CN201320653731U CN203502585U CN 203502585 U CN203502585 U CN 203502585U CN 201320653731 U CN201320653731 U CN 201320653731U CN 203502585 U CN203502585 U CN 203502585U
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Abstract
The utility model relates to a wireless monitoring system for mountain landslide monitoring. The wireless monitoring system consists of a transmitting device, a relay device, and a receiving device. The transmitting device is arranged at a near-end stable slope; the relay device is arranged at a middle sliding slope; and the receiving device is arranged at a far-end stable slope. After the relay device receives a signal from the transmitting device, the signal is forwarded to the receiving device by a fixed phase difference. Electromagnetic waves emitted by the relay device and the transmitting device have the same polarization directions; and the receiving device is connected with a terminal device by a wireless network. The provided wireless monitoring system has the advantages of simple structure, low cost, low power consumption, a few deployment points, and high ranging precision and the like and is suitable for long-term deployment monitoring at remote areas. Moreover, the provided wireless monitoring system with the good reliability is not influenced by weather factors like raining and heavy fog and the like; and all-weather automatic measurement and easy maintenance can be realized.
Description
Technical field
A kind of wireless monitor system for mountain landslide supervision of the utility model, relates to mountain landslide supervision field.
Background technology
Landslide refer to Rock And Soil on slope due to a variety of causes under the effect of gravity along certain weak face (or weak band) phenomenon of down sliding integrally.In recent years, along with the deterioration of environment, landslide disaster is day by day frequent, to country, has caused huge economic loss, becomes one of the most serious geologic hazard of China.The complex genesis of landslide, comprises that earthquake, earth movement, precipitation, river wash away, groundwater activities, human factor etc., prediction difficulty.Landslide is monitored, can understand and grasp the evolution process of sliding mass, catch in time the characteristic information of landslide disaster, for pre-landslide-proofing provides scientific basis.At present, for the technical method of landslide monitoring, manual measurement technology not only automaticity is low, and labor capacity is large, and can not realize Real-Time Monitoring.Although GPS measuring system has solved real-time dynamic monitoring problem, precision is not high, adopts static difference monitoring, and system cost is expensive.
Radio landslide monitoring technology can realize unattended robotization Real-Time Monitoring, and monitoring device is simple, has very high cost performance.The principle of radio landslide monitoring is based on wireless interfeerometry ranging.Traditional method is by two close high_frequency sine wave signals of emitter A, B while transmission frequency, at receiving trap C, D place, produce interference, receiving trap C, D will take out the low frequency envelope of interference signal and calculate envelope phase Φ c, Φ d after high frequency signals, obtain the phase differential Φ cd=Φ c-Φ d of two acceptance point envelopes, calculate interference distance corresponding to quaternary combination ABCD.The rank that its distance accuracy can reach centimetre, in this, precision can not meet the requirement of landslide monitoring.Existing patent " mountain landslide supervision system based on radio interference technology " (patent No. 201110091416.5) be optimized said method, by M interferometry in N frequency, in conjunction with deviation, receives the variation that rope function calculates interference distance.This method has been improved measuring accuracy to a certain extent, but still there are the following problems:
1), need to adopt a plurality of receiving traps to receive coherent signals to eliminate phase error, the configuration quantity of monitoring device is large, operating cost is high; Between each receiving trap, need to carry out Network Synchronization time service, agreement is calibrated, and has increased the complexity of receiving trap hardware design.
2), adopt four-tuple to add up to calculate interference distance, algorithm is complicated, to software and hardware configuration, requires high.
Summary of the invention
The technical problems to be solved in the utility model is: for cannot accurately measuring online the defect of landslide and software and hardware configuration complexity in prior art, provide a kind of and can accurately measure landslide, the wireless monitor system for mountain landslide supervision simple in structure.
The technical scheme that the utility model is taked is: a kind of wireless monitor system for mountain landslide supervision, comprise emitter, relay, receiving trap, described emitter is positioned at near-end and stablizes domatic, in the middle of being positioned at, described relay slides domatic, described receiving trap is positioned at far-end and stablizes domatic, described relay receives after the signal of described emitter, with the phase differential forward signal fixed to receiving trap, the electromagnetic wave of described relay and emitter transmitting has identical polarised direction, and receiving trap connects end device by wireless network.
Air line distance between described receiving trap and relay is much larger than the maximum displacement of the domatic permission of sliding.
A kind of wireless monitor system for mountain landslide supervision of the utility model, beneficial effect is as follows:
The utility model utilizes radio interference technology, the displacement of landslide Regional Landslide face is monitored in real time, for monitoring and the early warning of landslide provides a kind of novel effective ways.In monitoring device in monitoring system, only use 1 emitter, guarantee the stable of signal frequency and initial phase; Adopt relay forward signal, avoid the stationary problem between a plurality of emitters, improve measuring accuracy.That this monitoring device has is simple in structure, cost is low, energy consumption is low, deployment point is few, distance accuracy advantages of higher, is applicable to that remote districts are long-term disposes monitoring.This monitoring device good reliability, is not subject to the impact of the weather conditions such as rainfall, dense fog, can realize round-the-clock automatic measurement, is easy to safeguard.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is the structural representation of a kind of wireless monitor system for mountain landslide supervision of the utility model.
Fig. 2 is the typical layout of a kind of wireless monitor system for mountain landslide supervision of the utility model.
Embodiment
Core of the present utility model is the principle from interfeerometry ranging, simplifies distance measuring equipment and layout thereof, improves interfeerometry ranging precision, avoid multipath effect and weather etc. the impact of factor.According to the feature of mountain landslide supervision, the arrangement of design monitoring means, realizes high-acruracy survey.
As shown in Figure 1 and Figure 2: a kind of wireless monitor system for mountain landslide supervision, comprise emitter 1, relay 2, receiving trap 3, described emitter 1 is positioned at near-end and stablizes domatic 4, in the middle of being positioned at, described relay 2 slides domatic 5, described receiving trap 3 is positioned at far-end and stablizes domatic 6, described relay 2 receives after the signal of described emitter 1, with the phase differential forward signal fixed to receiving trap 3, the variation that receiving trap 3 detected phase are poor, calculates slide displacement amount, and result of calculation is sent to end device 8 by wireless network 7.The electromagnetic wave of described relay 2 and emitter 1 transmitting has identical polarised direction, and the air line distance L2 between described receiving trap 3 and relay 2 is much larger than the maximum displacement of the domatic permission of sliding.Emitter 1 is L1 with the air line distance of receiving trap 3.
The emitter 1 adopting in the utility model, relay 2 and receiving trap 3 are not point-blank arranged, form one and measure combination.
A method for mountain landslide supervision, comprises the following steps:
1): emitter 1 is to the sine wave signal of relay 2 and receiving trap 3 transmitting 2.4GHz;
2): after the signal of relay 2 receiving and transmitting units 1, with the directed signal receiving that forwards that differs of fixing;
3): the signal of receiving trap 3 receiving and transmitting units 1, relay 2 also carries out demodulation, the initial phase difference Φ 0 of tracer signal;
4): within measuring period, baseband signal is carried out to M=10 time and measure, the phase differential Φ n being averaged, and initial phase difference Φ 0 is relatively, calculates the variable quantity △ Φ n=Φ n-Φ 0 of phase differential;
5): according to the variation of the change calculations interference distance of phase differential, the domatic variation of sliding of deriving, concrete steps are as follows:
According to interfeerometry ranging principle, there is following relation in the variable quantity of interference distance and phase differential, the wavelength of baseband signal:
When the slide position of domatic 5 emitter 2, centre changes, interference distance will change, thereby phase differential also will change.Because glide direction may be inconsistent with the line direction of relay 2 and receiving trap 3, if there is angle q, so measured slippage L=△ d
12/ cosq.
The angle of the polarization of ele direction from emitter 1 and relay 2 being received by receiving trap 3 and relay 2 and receiving trap 3 line directions and all measuring accuracy is had a direct impact with the formed angle q of glide direction etc.When these two angles more hour, measuring accuracy is higher.
When selecting the frequency of baseband signal to be 2.4GHz, electromagnetic wavelength is 0.125m.When the detection accuracy of phase place variation reaches 1 °, the monitoring accuracy of slippage is 0.35mm, by multiple averaging, is measured and can be effectively reduced stochastic error.Landslide is 5 ~ 10mm accelerating deformation stage daily variation, and large can reach 80mm, is only facing slidingly more than sharply the daily variation of deformation stage just can reach 100mm, and this is all within the monitoring range allowing (being less than a wavelength).
Claims (2)
1. the wireless monitor system for mountain landslide supervision, comprise emitter (1), relay (2), receiving trap (3), it is characterized in that, described emitter (1) is positioned at near-end and stablizes domatic (4), in the middle of being positioned at, described relay (2) slides domatic (5), described receiving trap (3) is positioned at far-end and stablizes domatic (6), described relay (2) receives after the signal of described emitter (1), with the phase differential forward signal fixed to receiving trap (3), the electromagnetic wave of described relay (2) and emitter (1) transmitting has identical polarised direction, receiving trap (3) connects end device (8) by wireless network (7).
2. a kind of wireless monitor system for mountain landslide supervision according to claim 1, is characterized in that, the air line distance (L2) between described receiving trap (3) and relay (2) is much larger than the maximum displacement of the domatic permission of sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653731.7U CN203502585U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring system for mountain landslide monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653731.7U CN203502585U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring system for mountain landslide monitoring |
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| CN203502585U true CN203502585U (en) | 2014-03-26 |
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| CN201320653731.7U Expired - Fee Related CN203502585U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring system for mountain landslide monitoring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513242A (en) * | 2013-10-23 | 2014-01-15 | 三峡大学 | Wireless monitoring system for landslide monitoring |
| CN110082498A (en) * | 2019-04-08 | 2019-08-02 | 三峡大学 | A kind of landslide monitoring data unmanned plane acquisition system based on wireless sensor Internet of Things |
-
2013
- 2013-10-23 CN CN201320653731.7U patent/CN203502585U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513242A (en) * | 2013-10-23 | 2014-01-15 | 三峡大学 | Wireless monitoring system for landslide monitoring |
| CN103513242B (en) * | 2013-10-23 | 2016-01-20 | 三峡大学 | A kind of wireless monitor system for mountain landslide supervision |
| CN110082498A (en) * | 2019-04-08 | 2019-08-02 | 三峡大学 | A kind of landslide monitoring data unmanned plane acquisition system based on wireless sensor Internet of Things |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141023 |
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| EXPY | Termination of patent right or utility model |