CN106408821A - Buried perimeter intrusion detection system and method - Google Patents
Buried perimeter intrusion detection system and method Download PDFInfo
- Publication number
- CN106408821A CN106408821A CN201611130945.0A CN201611130945A CN106408821A CN 106408821 A CN106408821 A CN 106408821A CN 201611130945 A CN201611130945 A CN 201611130945A CN 106408821 A CN106408821 A CN 106408821A
- Authority
- CN
- China
- Prior art keywords
- tube
- perimeter intrusion
- float
- hollow hoses
- buried
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/10—Mechanical actuation by pressure on floors, floor coverings, stair treads, counters, or tills
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a buried perimeter intrusion detector. The buried perimeter intrusion detector includes a closed structure body, the closed structure body includes a U-shaped tube with liquid seal at the bottom, at least one end of the U-shaped tube is connected with a first hollow hose, the first hollow hose is not connected with the other end of the U-shaped tube and is closed, a small hole for ventilation with the other side of the liquid seal is reserved in any position of the closed structure body, a floater is arranged in the liquid seal, one side of the floater is located in an induction region of a mobile photoelectric sensor, and the mobile photoelectric sensor is connected with a microprocessor. According to the buried perimeter intrusion detector, since air chambers of two sides of the liquid seal communicate with each other, a system can adapt to changes of various environments (changes of temperature and earth's surface substances) and keeps liquid levels of two sides flush, the floater stands still, and the system does not need to be recalibrated. The buried perimeter intrusion detector provided by the invention adopts a pressure detection mode to detect whether the perimeter has someone who intrudes, is not affected by lightning strokes, metal objects or complex environment, interference to hydrops and green plants on the earth's surface is remarkably reduced, and misinformation brought due to external environment interference is effectively eliminated.
Description
Technical field
The present invention relates to perimeter security protection technology field is and in particular to a kind of buried perimeter intrusion detecting system and side
Method, is mainly used in the circumference intrusion defense of architecture enclosing.
Background technology
Circumference security protection refers in important area, such as national defence border, military base, key departments of government, oil depot coalfield, nuclear energy
Power station, solar power station, transformer station of power plant, bank, prison, museum, airport, harbour, villa community, data center, Shui Chu
Reason factory, chemical plant, school and other great infrastructure etc., for stoping illegal invasion destructive activity, along place circumference shape
Become safety precaution, invader is blocked in week out-of-bounds.Especially in public places such as museum, cultural centers and open
There is very strong demand at the scene such as cell and private villa house to circumference intrusion alarm, and single requirement to landscape for these places is relatively
Height, common infrared emission or fence are all improper, therefore often adopt buried hidden detection system.
Intrusion detection apparatus buried at present mainly have two classes：Reveal cable and vibration optical cable.Reveal cable and rely on electromagnetism
Field, to detect the movement of human body, is installed and is needed to avoid metal object, and thunderbolt weather is also easily disturbed, and is easily subject to rainy day
Hydrops and the interference of earth's surface green plants, produce wrong report.Vibration optical cable due to sensitiveer to the vibrations of high frequency, and to low frequency
Vibrations or bending are less sensitive, need in earth's surface laying sandstone to improve detection width, otherwise optical cable in therefore buried application
Need intensive snakelike laying (typically not greater than 20 centimetres of optical cable spacing) with obtain can feel wider search coverage (1 meter with
On), otherwise invader easily steps on sky or crosses.And optical cable needs geotechnique's lattice are fixed, and optical cable otherwise easily and are absorbed in
Soil and make the risk of thrashing.
To sum up, complexity installed by existing buried intruder detection system, and detectivity is low, and is easily subject to the severe gas such as thunderbolt weather
Waiting interference, also easily being invaded and harassed by puddle and ground flora, thus producing wrong report.
Content of the invention
For the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of install simply, it is not subject to environmental disturbances
Buried perimeter intrusion detecting device, the existing buried intrusion detection apparatus of effectively solving easily cause the problem of wrong report, have report
Alert accuracy is high, environmental suitability is strong it is easy to install, easy to use, the features such as with low cost.
To achieve these goals, the invention provides a kind of buried perimeter intrusion detecting device, including enclosed structure,
Described enclosed structure includes the U-tube that a bottom carries fluid-tight, and described U-tube at least one end connects one first hollow hoses,
Described first hollow hoses are not connected to the other end closing of U-tube, and any one place position on described enclosed structure is left
With the aperture of fluid-tight opposite side ventilation, it is provided with a float in described fluid-tight, described float one side is in moving photoconductor sensor
Induction zone, described moving photoconductor sensor is connected with a microprocessor.
One end waterproof and breathable valve closure of U-tube, described first hollow hoses are not connected on described first hollow hoses
On be not connected at the closing of U-tube one end, leave the aperture with the ventilation of fluid-tight opposite side.
Described U-tube two ends connect the first hollow hoses and the second hollow hoses, described first hollow hoses and respectively
Pass through between two hollow hoses to carry foraminate adapter to connect.
Described moving photoconductor sensor is mouse photoelectric sensing module.
Described first hollow hoses material is silica gel tube or butyl rubber pipe.
Described second hollow hoses material is silica gel tube or butyl rubber pipe.
The described U-tube of institute is transparent glass tube or hard transparent plastic pipe.
Described fluid-tight is following any one or more：Water, aqueous solution or organic liquid.
It is long slice plastic above described float.
An outer sheathed annular ring above described float, for limiting float shifted laterally.
Described microprocessor, specifically for the float mobile data detecting according to moving photoconductor sensor, calculates float
Total displacement and acceleration, and then judge the hard pressed size in ground and persistent period, if exceeding given threshold, that is, determine and send out
Raw invasion, provides alarm signal.
The present invention carrys out detection perimeter by the way of pressure detecting, and whether someone invades, and is not struck by lightning, and metal object is complicated
The impact of environment, the interference to hydrops and earth's surface green plants is significantly reduced, and effectively eliminates and is brought due to external environmental interference
Wrong report.The present invention is communicated due to fluid-tight both sides air chamber, and system adapts to change (temperature, the change of surface geology of various environment
Change) and keep both sides liquid level concordant, float is static, therefore system need not be recalibrated.The present invention is highly sensitive due to employing
The moving photoconductor sensor of mouse, can accurately detect the small movements of float, that is, in flexible pipe, less pressure change all may be used
To sense.Present invention test finds to be embedded in the flexible pipe of soil underground 20cm, you can to detect 1 meter of outer ordinary people in earth's surface
Walking.Therefore the present invention includes the detecting area of single flexible pipe apparently higher than the detecting area of unit cable in prior art so that peace
Dress is more convenient.
Technique effect below with reference to design, concrete structure and generation to the present invention for the accompanying drawing is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description
Fig. 1：Perimeter intrusion detecting device structural representation one of the present invention；
Fig. 2：Perimeter intrusion detecting device structural representation two of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
With reference to Figure of description, the present invention is described in further detail.
A kind of buried perimeter intrusion detecting device that the present invention provides, including：One bottom carries the U-tube 3 of fluid-tight 2, institute
State U-tube 3 at least one end and connect one first hollow hoses 1, described first hollow hoses 1 are not connected to another end seal of U-tube 3
Close, and at this closing, leave the aperture with the ventilation of fluid-tight opposite side, in described fluid-tight 2, be provided with a float 5, described float 5 one side
It is in the induction zone of moving photoconductor sensor 6, described moving photoconductor sensor 6 is connected with a microprocessor 7.
Embodiment one
As shown in figure 1, a kind of buried perimeter intrusion detecting device that the present invention provides, including：One bottom carries fluid-tight 2
U-tube 3, described U-tube 3 at least one end connects one first hollow hoses 1, and described first hollow hoses 1 are not connected to U-tube 3
The other end is closed with narrow meshed waterproof vent valve 4, is provided with a float 5 in described fluid-tight 2, and described float 5 one side is in movement
The induction zone of photoelectric sensor 6, described moving photoconductor sensor 6 is connected with a microprocessor 7.
The embodiment of the present invention one, the first hollow hoses 1 other end is connected with waterproof vent valve 4, communicates with air, carries
The U-tube 3 of fluid-tight 2 is having the one end open of float 5 also and atmosphere.The present invention is communicated due to fluid-tight both sides air chamber, system
Adapt to the change (temperature, the change of surface geology) of various environment and keep both sides liquid level concordant, float is static, therefore need not
System is recalibrated.
The present invention buried perimeter intrusion detecting device operation principle is as follows：Described first hollow hoses 1 are specifically for sensing
The change of pressure.Specifically, when the first hollow hoses 1 being embedded in underground, no external interference, two liquid levels of fluid-tight are contour, float
Transfixion.
When someone passes by from ground, the pressure on ground is delivered on the first hollow hoses 1 through soil or sandstone, and first is empty
The extrusion of soft-hearted pipe 1, the pressure of the inside air changes.Because the first hollow hoses are air-tight state (waterproof and breathable
Valve Air permenbility is minimum) it is impossible to realize balance with the air chamber moment of fluid-tight opposite side, therefore this pressure reduction will promote the shifting of fluid-tight 2
Dynamic, thus taking the motion of float 5 to, the motion of float 5 can be caught by moving photoconductor sensor 6 immediately, and output mobile data
To microprocessor 7, these data simply include the displacement of float, and microprocessor 7 provides alarm signal after being analyzed.
Moving photoconductor sensor 6 of the present invention is mouse photoelectric sensing module.In order to improve detectivity, this
Mingguang City's electric transducer is the photoelectricity engine modules used in mouse for induction mouse movement, and mouse common at present is just permissible
Realize the resolution of 1000CPI, be equivalent to the movement of 0.0254mm, photoelectric sensor of the present invention can accurately detect float
The small movements of 0.0254mm, are calculated with fluid-tight for water, the change of liquid level 0.1mm is equivalent to the pressure differential of 1Pa, that is, in flexible pipe
The pressure change of 0.254Pa can be sensed.
In being embodied as, the embodiment of the present invention the first hollow hoses 1 material is silica gel tube or butyl rubber pipe.U-tube 3
It is metal tube, or plastic tube, or glass tubing, or plastic conduit.In the embodiment of the present invention one, U-tube 3 also can be empty by first
The bending of soft-hearted pipe one end forms.
In the present embodiment, vent valve employs waterproof vent valve it is therefore intended that being conveniently embedded in underground.Those of ordinary skill should
Recognize, if flexible pipe is not embedded in underground when using, the common stopper with micropore is to meet requirement.And note also
, aperture can also stay the place near U-tube, only need to increase a threeway and can be achieved with.
Embodiment of the present invention fluid-tight 2 is following any one or more：Water, aqueous solution, organic liquid.Specifically, fluid-tight
Can be water, but in order to prevent from freezing under too fast evaporation or low temperature, chemical addition agent can be added, such as Polyethylene Glycol, fluid-tight
May also include little but not sticky from volatility, nonflammable explosive organic liquid, such as：Silicone oil.
Specifically, embodiment of the present invention float 5 top is long slice plastic, and it is close to moving photoconductor sensor 6 so that moving
Dynamic photoelectric sensor 6 accurately captures the motion of float 5.Preferably, an outer sheathed annular above embodiment of the present invention float
Circle, makes the top of float suitably fix so as to can freely move up and down, but must not have larger shifted laterally, thus can protect
Demonstrate,prove in the working range be in all the time when this float moves up and down moving photoconductor sensor (induction zone), that is, ensure the upper and lower of float
Movement can be detected.
Microprocessor 7 of the present invention, specifically for the float mobile data being detected according to moving photoconductor sensor, calculates floating
The total displacement of son and acceleration, and then judge the hard pressed size in ground and persistent period, if exceeding given threshold, that is, determine
Invade, provide alarm signal.Specifically, exceed when the hard pressed size in described microprocessor judges ground and persistent period
During the threshold value setting, that is, determine and invade, provide alarm signal；When the hard pressed size in described microprocessor judges ground and
When persistent period is not above the threshold value setting, that is, determines and do not invade, detector of the present invention will continue the spy of next step
Survey work.
The embodiment of the present invention is found by test, is embedded in the flexible pipe of soil underground 20cm, can detect 1 meter of outer ordinary people
Walking in earth's surface.Therefore, the present invention includes the detecting area of single hollow flexible pipe apparently higher than unit cable in prior art
Detecting area is so that installation is more convenient.
The present invention carrys out detection perimeter by the way of pressure detecting, and whether someone invades, and is not struck by lightning, and metal object is complicated
The impact of environment, the interference to hydrops and earth's surface green plants is significantly reduced, and effectively eliminates and is brought due to external environmental interference
Wrong report.
Embodiment two
As shown in Fig. 2 the another kind buried perimeter intrusion detecting device that the present invention provides, including：One bottom carries fluid-tight 2
U-tube 3, described U-tube 3 two ends connect the first hollow hoses 1 and the second hollow hoses 10, described first hollow hoses respectively
1 and second is connected by carrying foraminate adapter 8 between hollow hoses 10, and fluid-tight both sides air chamber communicates, and is provided with described fluid-tight 2
One float 5, described float 5 one side is in the induction zone of moving photoconductor sensor 6, described moving photoconductor sensor 6 and a micro- place
Reason device 7 connects.
The embodiment of the present invention two respectively installs hollow hoses at U-tube 3 two ends, and that is, the first hollow hoses 1 and second are empty
Soft-hearted pipe 10, the end of two hollow hoses is passed through to carry foraminate adapter 8 to connect, therefore can not be by two hollow hoses
Gas is completely separated, and fluid-tight two can keep pressure balance.The present invention is communicated due to fluid-tight both sides air chamber, and system adapts to respectively
Plant the change (temperature, the change of surface geology) of environment and keep both sides liquid level concordant, float is static, therefore need not be to system weight
New calibration.
In enforcement, when described first hollow hoses 1 and the second hollow hoses 10 are embedded in underground, no external interference, fluid-tight
Two liquid levels are contour, float transfixion.When someone passes by from ground, the pressure on ground is delivered to the first sky through soil or sandstone
On soft-hearted pipe 1 and the second hollow hoses 10, in the first hollow hoses 1 and the second hollow hoses 10, air is squeezed and promotes fluid-tight 2
Concussion, in fluid-tight, float 5 then moves up and down, and this motion is caught by moving photoconductor sensor 6 and sends the signal to microprocessor
7, microprocessor 7 provides alarm signal after being analyzed.
Moving photoconductor sensor 6 of the present invention is mouse photoelectric sensing module.In order to improve detectivity, this
Bright moving photoconductor sensor is the photoelectricity engine modules used in mouse for induction mouse movement, and mouse common at present is just
The resolution of 1000CPI can be realized, be equivalent to the movement of 0.0254mm, photoelectric sensor of the present invention can accurately detect float
The small movements of 0.0254mm, are calculated with fluid-tight for water, the change of liquid level 0.1mm is equivalent to the pressure differential of 1Pa, that is, in flexible pipe
The pressure change of 0.254Pa can be sensed.
In being embodied as, the first hollow hoses 1 described in the embodiment of the present invention and the second hollow hoses 10 material are silica gel tube
Or butyl rubber pipe.Fluid-tight 2 is following any one or more：Water, aqueous solution, organic liquid.Specifically, fluid-tight can be
Water, but in order to prevent too fast evaporation or sharp freezing, some chemical addition agents can be added, fluid-tight may also include from volatilization
Property is little but not sticky, nonflammable explosive organic liquid, such as：Silicone oil.
Preferably, the outer sheathed annular ring in embodiment of the present invention float 5 top, the top making float suitably fixing so as to
Can freely move up and down, but must not have larger shifted laterally, so it is ensured that being in light when this float moves up and down all the time
In the working range of electric transducer, that is, ensure that moving up and down of float can be detected.
It is long slice plastic above embodiment of the present invention float.In being embodied as, float 5 in U-tube 3, in order to ensure
The motion of float 5 is accurately detected by moving photoconductor sensor 6, except need by float 5 top plus collar-shaped circle stably in addition to, also need
Consider the distance between float 5 top and moving photoconductor sensor 6.Because mouse photoelectric sensor generally only has 1-3mm's
Operating distance, the therefore present invention need to ensure to be close to U-tube above float, and U-tube wall is thin and transparent.Described U-tube
Glass tubing or plastic conduit can be selected (such as：Acrylic).
Microprocessor 7 of the present invention, specifically for the float mobile data being detected according to moving photoconductor sensor, calculates floating
The total displacement of son and acceleration, and then judge the hard pressed size in ground and persistent period, if exceeding given threshold, that is, determine
Invade, provide alarm signal.Specifically, exceed when the hard pressed size in described microprocessor judges ground and persistent period
During the threshold value setting, that is, determine and invade, provide alarm signal；When the hard pressed size in described microprocessor judges ground and
When persistent period is not above the threshold value setting, that is, determines and do not invade, detector of the present invention will continue the spy of next step
Survey work.
The embodiment of the present invention, two hollow hoses can be separated by 1 meter about parallel laid below earth's surface, therefore can be real
Existing broader search coverage (2-4 rice), improves perimeter protection ability.
The present invention carrys out detection perimeter by the way of pressure detecting, and whether someone invades, and is not struck by lightning, and metal object is complicated
The impact of environment, the interference to hydrops and earth's surface green plants is significantly reduced, and effectively eliminates and is brought due to external environmental interference
Wrong report.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. it is characterised in that including enclosed structure, described enclosed structure includes one to a kind of buried perimeter intrusion detecting device
Bottom carries the U-tube (3) of fluid-tight (2), described U-tube (3) at least one end connection one first hollow hoses (1), and described first
Hollow hoses (1) be not connected to U-tube (3) the other end closing, any one place position on described enclosed structure is left with
The aperture of fluid-tight opposite side ventilation, is provided with a float (5) in described fluid-tight (2), described float (5) is simultaneously in moving photoconductor and passes
The induction zone of sensor (6), described moving photoconductor sensor (6) is connected with a microprocessor (7).
2. buried perimeter intrusion detecting device according to claim 1 is it is characterised in that described first hollow hoses (1)
On be not connected at the closing of U-tube (3) one end, leave the aperture with the ventilation of fluid-tight opposite side.
3. buried perimeter intrusion detecting device according to claim 1 is it is characterised in that described first hollow hoses (1)
On be not connected to one end of U-tube (3) waterproof vent valve (4) and close.
4. buried perimeter intrusion detecting device according to claim 1 is it is characterised in that described U-tube (3) two ends are distinguished
Connect the first hollow hoses (1) and the second hollow hoses (10), between described first hollow hoses (1) and the second hollow hoses (10)
Connected by carrying foraminate adapter (8).
5. the buried perimeter intrusion detecting device according to any one of claim 1-4 is it is characterised in that described mobile light
Electric transducer (6) is mouse photoelectric sensing module.
6. buried perimeter intrusion detecting device according to claim 5 is it is characterised in that described first hollow hoses (1)
Material is silica gel tube or butyl rubber pipe, and described second hollow hoses (10) material is silica gel tube or butyl rubber pipe.
7. buried perimeter intrusion detecting device according to claim 5 is it is characterised in that described U-tube (3) is transparent glass
Glass pipe or hard transparent plastic pipe.
8. buried perimeter intrusion detecting device according to claim 5 is it is characterised in that described fluid-tight (2) is following
Any one or more：Water, aqueous solution, organic liquid.
9. buried perimeter intrusion detecting device according to claim 5 is it is characterised in that be length above described float (5)
Slice plastic, and a sheathed annular ring outward, for limiting float shifted laterally.
10. buried perimeter intrusion detecting device according to claim 5, it is characterised in that described microprocessor (7), has
Body is used for the float mobile data detecting according to moving photoconductor sensor, calculates the total displacement of float and acceleration, and then
Judge the hard pressed size in ground and persistent period, if exceeding given threshold, that is, determine and invade, provide alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611130945.0A CN106408821A (en) | 2016-12-09 | 2016-12-09 | Buried perimeter intrusion detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611130945.0A CN106408821A (en) | 2016-12-09 | 2016-12-09 | Buried perimeter intrusion detection system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106408821A true CN106408821A (en) | 2017-02-15 |
Family
ID=58084643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611130945.0A Pending CN106408821A (en) | 2016-12-09 | 2016-12-09 | Buried perimeter intrusion detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106408821A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88203958U (en) * | 1988-04-16 | 1988-12-21 | 中国科学院声学研究所 | Photoelectric air pressure sensor |
| CN2135777Y (en) * | 1992-08-03 | 1993-06-09 | 颜正 | Float type micro pressure different measurer |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
| CN202928569U (en) * | 2012-10-19 | 2013-05-08 | 桂林机床股份有限公司 | U-shaped floater pointer type levelling device |
| CN104101450A (en) * | 2014-08-01 | 2014-10-15 | 武汉理工光科股份有限公司 | Buried fiber grating type perimeter intrusion detector |
| CN206400718U (en) * | 2016-12-09 | 2017-08-11 | 上海锂居信息科技有限公司 | A kind of buried perimeter intrusion detecting system |
-
2016
- 2016-12-09 CN CN201611130945.0A patent/CN106408821A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88203958U (en) * | 1988-04-16 | 1988-12-21 | 中国科学院声学研究所 | Photoelectric air pressure sensor |
| CN2135777Y (en) * | 1992-08-03 | 1993-06-09 | 颜正 | Float type micro pressure different measurer |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
| CN202928569U (en) * | 2012-10-19 | 2013-05-08 | 桂林机床股份有限公司 | U-shaped floater pointer type levelling device |
| CN104101450A (en) * | 2014-08-01 | 2014-10-15 | 武汉理工光科股份有限公司 | Buried fiber grating type perimeter intrusion detector |
| CN206400718U (en) * | 2016-12-09 | 2017-08-11 | 上海锂居信息科技有限公司 | A kind of buried perimeter intrusion detecting system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hürlimann et al. | Debris-flow monitoring and warning: Review and examples | |
| Angeli et al. | A critical review of landslide monitoring experiences | |
| Trnkoczy et al. | Site selection, preparation and installation of seismic stations | |
| US8459096B2 (en) | Radon monitoring system for earthquake prediction | |
| CN106382971B (en) | Multi-functional low-light groundwater level monitoring device and its system | |
| CN101363918B (en) | Method for positioning and identifying objects by solar blind UV | |
| US20210109248A1 (en) | System, method, and device for real-time sinkhole detection | |
| CN101916492A (en) | Optical fiber intelligent sensor used in security system | |
| CN205713184U (en) | A kind of safety protection device of municipal road foundation pit | |
| CN206400718U (en) | A kind of buried perimeter intrusion detecting system | |
| CN106408821A (en) | Buried perimeter intrusion detection system and method | |
| Hare et al. | Water‐level fluctuations due to barometric pressure changes in an isolated portion of an unconfined aquifer | |
| CN105137487A (en) | Underground water flow field description method based on manual water discharging interference field | |
| CN107248264A (en) | A kind of debris flow early-warning device and method for early warning | |
| CN206210032U (en) | A kind of perimeter intrusion detecting system | |
| Zeng et al. | Sinkhole remedial alternative analysis on karst lands | |
| CN206348045U (en) | Multi-functional low-light groundwater level monitoring device and its system | |
| CN206907199U (en) | A kind of debris flow early-warning device | |
| CN110438934A (en) | A kind of hydraulic engineering construction method based on ecological protection technology | |
| Zhao et al. | Analysis of safety early warning technology for the myanmar-china oil and gas pipeline (myanmar section) | |
| Hussain et al. | Towards safer mining: scientific measurement approaches that could be applied for imaging and locating the buried container lamp-room at Lily mine | |
| Hammack et al. | Methods for finding legacy Wells in residential and commercial areas | |
| KR101605615B1 (en) | Ground Balance Sensor | |
| RU2003136481A (en) | METHOD OF CONTINUOUS MONITORING THE DIRECTION OF ACTION OF THE DEFLECTOR, MEASUREMENT OF ZENIT AND AZIMUTAL ANGLES OF WELLS AND A DEVICE FOR ITS IMPLEMENTATION | |
| Bansal et al. | Earthquake precursory studies in India: an integrated approach |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170215 |