CN203501991U - Wireless monitoring apparatus for mountain landslide - Google Patents
Wireless monitoring apparatus for mountain landslide Download PDFInfo
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- CN203501991U CN203501991U CN201320654047.0U CN201320654047U CN203501991U CN 203501991 U CN203501991 U CN 203501991U CN 201320654047 U CN201320654047 U CN 201320654047U CN 203501991 U CN203501991 U CN 203501991U
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Abstract
The utility model is a wireless monitoring apparatus for mountain landslide. The wireless monitoring apparatus consists of a first transmitting device, a second transmitting device, a receiving device, a baseband signal generator. The first transmitting device is arranged at a lower-portion stable slope; the second transmitting device is arranged at a middle-portion sliding slope; and the receiving device is arranged at an upper-portion stable slope. The first transmitting device and the second transmitting device are connected with the baseband signal generator; and the receiving device is connected with a terminal device by a wireless network. The provided wireless monitoring apparatus has the advantages of simple structure, low cost, low energy consumption, less deployment point, high ranging accuracy and the like and is suitable for long-term deployment monitoring at remote areas. Moreover, the provided apparatus 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 landslide of the utility model wireless monitoring device, relates to mountain landslide supervision field.
Background technology
Landslide serious threat the people's lives and property safety, destroys the facilities such as building, highway, railway, to country, has caused huge economic loss, is 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.Therefore, Real-Time Monitoring is carried out in landslide necessary.
Conventional landslide displacement monitoring method can be divided into following 2 classes: interior sight method and outward appearance method.Interior sight fado adopts the deep deformation of the monitoring sliding masses such as tiltmeter, but needs the engineerings such as match-drill excavation, great in constructing amount, Real-Time Monitoring difficulty, and it is less to measure range, and the failure rate of monitoring device is high; The direct means of testing of outward appearance method mainly contains routine monitoring displacement transducer and GPS GPS.Routine monitoring displacement transducer is by being arranged on mobile domatic traction steel wire, adopt various direct or indirect displacement transducers, as movable domatic with respect to stablizing domatic displacement in angular transducer, telescopic displacement sensor sensing, but there is the problem of installation inconvenience in such sensor; Common GPS technical monitoring landslide, measuring accuracy is not high, if adopt static Differential GPS Technology, the price of its equipment is higher.The Landslide Monitoring device that high precision, low cost, energy robotization are measured in real time still have wide market outlook.
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 variable quantity of derivation landslide displacement.The rank that its distance accuracy can reach centimetre, but 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 the variation of deviation receipts rope function calculating 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, monitoring system deployment cost is high; Between each receiving trap, need to carry out Network Synchronization time service, increased the complexity of receiving trap hardware design.
2), improved algorithm can not be eliminated the impact of multipath effect completely.Frequency electromagnetic waves is a kind of spherical wave, the sine wave signal of emitter transmitting can be propagated and be arrived receiving trap by the shortest path of straight line, also can pass through to arrive receiving trap after the reflection of the object such as ground, mountain forest, the interference signal of reception is the result after the stack of these signals.There is larger error in the phase place recording in this case, adopts repeatedly and measure and can improve phase error, but can not eliminate error, still can cause larger range error.
3), 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, provides a kind of and can accurately measure landslide, landslide wireless monitoring device and monitoring method simple in structure.
The technical scheme that the utility model is taked is: a kind of landslide wireless monitoring device, comprise the first emitter, the second emitter, receiving trap, baseband signal generator, described the first emitter is positioned at bottom and stablizes domatic, the second emitter is positioned at middle part and slides domatic, receiving trap is positioned at top and stablizes domaticly, and baseband signal generator connects the first emitter and the second emitter, and receiving trap connects end device by wireless network.
Described baseband signal generator is connected with the first emitter, the second emitter respectively by high frequency wire, described baseband signal generator produces the sine wave signal of two-way homology, described the first emitter, the second emitter offset of sinusoidal signal carry out high frequency modulated, and directional transmissions high-frequency carrier signal.
Air line distance between described receiving trap and the second emitter is much larger than the maximum displacement of the domatic permission of sliding.
A landslide wireless monitor monitoring method, is characterized in that comprising the following steps:
1), baseband signal generator produces the sine wave signal of two-way homology, by high frequency wire transmission to the first emitter, the second emitter;
2), the first emitter, the second emitter adopt GHz sine wave to modulate baseband signal, and directional transmissions;
3), receiving trap receives the signal of the first emitter, the second emitter and receives and demodulation, the range signal such as zooms into, then obtains phase differential by coherent detection, records the initial phase difference of baseband signal;
4), within measuring period, measure the phase differential of baseband signal, and initial phase difference comparison, calculates the variable quantity of phase differential;
5), according to the variation of the change calculations interference distance of phase differential, the slippage size of derive sliding domatic.
Within a measuring period, carry out the measurement of M phase differential, take the method for multiple averaging, obtain final phase differential and changing value thereof in this cycle.
There is corresponding relation with the domatic displacement L that slides in the variation of described final phase differential △ Φ: △ Φ=2pLcosq/l, wherein: l is base band wavelength of radio wave, q is the second emitter and receiving trap line direction and the formed angle of glide direction.
A kind of landslide of the utility model wireless monitoring device, 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.
Two emitter shared signal sources in monitoring device of the present utility model, guarantee that baseband signal differs stable; After adopting baseband signal modulation, launch, in receiving end demodulation, extract baseband signal, can effectively suppress the impact that the factors such as multipath effect and weather differ baseband signal, improve measuring accuracy.That monitoring device of the present utility model 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.Monitoring device good reliability of the present utility model, 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
Principle of work:
The utility model is from the principle of 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 landslide wireless monitoring device, comprise the first emitter 1, the second emitter 2, receiving trap 3, baseband signal generator 4, described the first emitter 1 is positioned at bottom and stablizes domatic 5, the second emitters 2 and be positioned at middle part and slide domatic 6, receiving trap 3 is positioned at top and stablizes domaticly 7, and baseband signal generator 4 connects the first emitter 1 and the second emitters 2.
Described baseband signal generator 4 is connected with the first emitter 1, the second emitter 2 respectively by high frequency wire, described baseband signal generator 4 produces the sine wave signal of two-way homology, described the first emitter 1, the second emitter 2 offset of sinusoidal signals carry out high frequency modulated, and directional transmissions high-frequency carrier signal.
Air line distance L2 between described receiving trap 3 and the second emitter 2 is much larger than the maximum displacement of the domatic permission of sliding.The first emitter 1 is L1 with the air line distance of receiving trap 3.
The utility model is stablized in the bottom of near-end on domatic 5 the first emitter 1 is set, and slides domatic 6 the second emitter 2 to be set at middle part; On the top of far-end, stablize domatic 7 receiving trap 3 is set, the variation that receiving trap 3 detected phase are poor, calculates slide displacement amount, and result of calculation is sent to end device 9 by wireless network 8.The second emitter 2 is apart from more than receiving trap 1000m.The first emitter 1, the second emitter 2 and the receiving trap 3 adopting in the utility model point-blank do not arranged, forms one and measures combination.
A landslide wireless monitor monitoring method, comprises the following steps:
1): baseband signal generator 4 produces the sinusoidal wave baseband signal of 600MHz of two-way homology, and baseband signal is by high frequency wire transmission to the first emitter 1, the second emitter 2.
2): the first emitter 1, the second emitter 2 adopt the baseband signal of the sinusoidal wave reciprocity amplitude of 2.4GHz to modulate, and directional transmissions.
3): the signal that receiving trap 3 receives the first emitters 1, the second emitter 2 also receives also demodulation, the range signal such as zoom into, then obtain phase differential by coherent detection, record the initial phase difference Φ 0 of baseband 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 position of the second domatic emitter 2 that slides changes, interference distance will change, thereby phase differential also will change.Because glide direction may be inconsistent with the line direction of the second emitter 2 and receiving trap 3, if there is angle q, measured slippage L=△ d12/cosq.
The baseband signal amplitude and the second emitter 2 that due to receiving trap 3, demodulate all have a direct impact measuring accuracy with receiving trap 3 line directions and the formed angle q of glide direction etc.Baseband amplitude equates, angle is less, and measuring accuracy is higher.When the line direction of glide direction and the second emitter 2 and receiving trap 3 is consistent, slippage equals interference distance.
When selecting the frequency of baseband signal to be 600MHz, electromagnetic wavelength is 0.5m.When the detection accuracy of phase place variation reaches 1 °, the monitoring accuracy of slippage is 1.4mm, 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 (3)
1. a landslide wireless monitoring device, comprise the first emitter (1), the second emitter (2), receiving trap (3), baseband signal generator (4), it is characterized in that, described the first emitter (1) is positioned at bottom and stablizes domatic (5), the second emitter (2) is positioned at middle part slip domatic (6), receiving trap (3) is positioned at top and stablizes domatic (7), baseband signal generator (4) connects the first emitter (1) and the second emitter (2), and receiving trap (3) connects end device (9) by wireless network (8).
2. a kind of landslide wireless monitoring device according to claim 1, it is characterized in that, described baseband signal generator (4) is connected with the first emitter (1), the second emitter (2) respectively by high frequency wire, described baseband signal generator (4) produces the sine wave signal of two-way homology, described the first emitter (1), the second emitter (2) offset of sinusoidal signal carry out high frequency modulated, and directional transmissions high-frequency carrier signal.
3. a kind of landslide wireless monitoring device according to claim 1, is characterized in that, the air line distance (L2) between described receiving trap (3) and the second emitter (2) is much larger than the maximum displacement of the domatic permission of sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654047.0U CN203501991U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring apparatus for mountain landslide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320654047.0U CN203501991U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring apparatus for mountain landslide |
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| CN203501991U true CN203501991U (en) | 2014-03-26 |
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| CN201320654047.0U Expired - Fee Related CN203501991U (en) | 2013-10-23 | 2013-10-23 | Wireless monitoring apparatus for mountain landslide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528548A (en) * | 2013-10-23 | 2014-01-22 | 三峡大学 | Wireless landslide monitoring device and monitoring method |
| CN104930991A (en) * | 2015-07-08 | 2015-09-23 | 陈静 | Displacement monitoring method based on carrier wave phase and displacement monitoring system |
| CN112013803A (en) * | 2020-09-22 | 2020-12-01 | 中铁二十四局集团安徽工程有限公司 | Landslide displacement measuring device and measuring method thereof |
-
2013
- 2013-10-23 CN CN201320654047.0U patent/CN203501991U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528548A (en) * | 2013-10-23 | 2014-01-22 | 三峡大学 | Wireless landslide monitoring device and monitoring method |
| CN104930991A (en) * | 2015-07-08 | 2015-09-23 | 陈静 | Displacement monitoring method based on carrier wave phase and displacement monitoring system |
| CN112013803A (en) * | 2020-09-22 | 2020-12-01 | 中铁二十四局集团安徽工程有限公司 | Landslide displacement measuring device and measuring method thereof |
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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 |