CN104236475A - Disaster-prevention snow depth monitoring system and snow depth sensor angle remote correction method - Google Patents
Disaster-prevention snow depth monitoring system and snow depth sensor angle remote correction method Download PDFInfo
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- CN104236475A CN104236475A CN201410459186.7A CN201410459186A CN104236475A CN 104236475 A CN104236475 A CN 104236475A CN 201410459186 A CN201410459186 A CN 201410459186A CN 104236475 A CN104236475 A CN 104236475A
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Abstract
The invention discloses a disaster-prevention snow depth monitoring system and a snow depth sensor angle remote correction method in the field of disaster-prevention monitoring technology of snow depth sensors. The disaster-prevention snow depth monitoring system comprises a longitudinal rod, a transverse rod, a camera and a snow depth sensor. According to the snow depth sensor angle remote correction method, the reduction scale of a picture photographed by the camera and an actual site range is calculated, so that the change value of the inclined angle of the snow depth sensor is calculated, and precise accumulated snow depth is obtained through the change value.
Description
Technical field
The invention belongs to the anti-disaster monitoring technical field of snow depth sensor, particularly relate to take precautions against natural calamities snow depth monitoring system and the long-range antidote of snow depth sensor angles.
Background technology
At present, the meteorological monitoring sensor of snow depth sensor is widely used in railway anti-disaster monitoring technique field, by reporting to the police to snow depth, ensures traffic safety.Snow depth sensor can have an angle tilted with vertical direction when mounted, this angle is input in snow depth sensor, because snow depth value=snow depth sensor is to the distance-snow depth sensor on ground to the distance on accumulated snow surface, wherein, snow depth sensor can shift to an earlier date to the distance on ground to be measured at the scene, the length of the infrared ray that snow depth sensor penetrates to the distance=snow depth sensor on accumulated snow surface and the cosine value * snow depth sensor at vertical direction pitch angle.But when earth shock frequently occurs, the mounting clamp that time has grown snow depth sensor easily loosens, and due to gravity factor, the angle of the inclination of snow depth sensor and vertical direction can diminish, if and also according to original angle calculation snow depth value, measurement result will produce error.Traditional method re-starts measurement to scene to sensor angles.
Summary of the invention
The object of the invention is to, provide one to take precautions against natural calamities snow depth monitoring system and the long-range antidote of snow depth sensor angles, cannot the problem of long-range rectification for solve after existing take precautions against natural calamities snow depth monitoring system and the change of snow depth sensor angles.
To achieve these goals, the technical scheme that the present invention proposes is that one is taken precautions against natural calamities snow depth monitoring system, vertical pole 1 vertical ground in system is arranged bottom it to be fixed by backing and ground, horizontal cross bar 2 left end is fixed on vertical pole 1 top, video camera 3 vertical ground is fixed on cross bar right-hand member, makes camera lens vertical plane earthward; Install snow depth sensor 4 in water balance bar 2 vertical ground direction, the end place α angle that is tilted to the right that keeps left, the point on the infrared ray arrival ground that snow depth sensor 4 penetrate overlaps with the point that video camera 3 optical center is mapped to ground; Be mapped to ground place in the mounting points of snow depth sensor 4 and marking rod 5 is set; When described snow depth sensor 4 will ensure inclined angle alpha=0 °, direction, snow depth sensor vertical ground with the mounting distance of video camera 3, the point on the infrared ray arrival ground of injection is still included in video camera coverage.
Described 0 ° of < α <90 °.
Described snow depth sensor can measure the distance between point that the launching site of infrared ray and infrared ray arrive accumulated snow surface automatically.
The highest snow depth of described marking rod height >.
Based on the long-range antidote of snow depth sensor angles of described snow depth monitoring system of taking precautions against natural calamities, it is characterized in that, described method comprises the steps:
Step 1: measure the snow depth sensor vertical distance to ground, measurement camera lens centralizing mapping to the point on ground and snow depth sensor maps to the point on ground between distance;
Step 2: the scale down calculating shot by camera photo and actual place scope;
Step 3: the pitch angle after changing according to scale down calculating snow depth sensor and Vertical Square plane inclination;
Step 4: be input at the pitch angle after the change of calculating in step 3 in snow depth sensor, calculates snow depth value.
Accompanying drawing explanation
Fig. 1 is snow depth monitoring system of taking precautions against natural calamities, wherein 1.-vertical pole, 2.-cross bar, 3.-shooting
Machine, 4.-snow depth sensor, 5.-marking rod;
Fig. 2 is the long-range antidote of application snow depth sensor angles and the comparison diagram not using the method and actual snow depth measured value; Not with the snow depth value curve that forwarding method of the present invention is measured when the inclination angle beta of wherein 1.-actual snow depth sensor and vertical direction changes; The snow depth value curve having used forwarding method of the present invention to measure when the inclination angle beta of 2.-actual snow depth sensor and vertical direction changes.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
Embodiment 1:
Composition graphs 1 can be found out, snow depth sensing system of taking precautions against natural calamities comprises the vertical pole 1 that vertical ground is arranged, and the bottom of vertical pole is fixed by backing and ground, and vertical pole top arranges a horizontal cross bar 2, and the left end of cross bar is horizontally fixed on vertical pole top, and cross bar is d apart from floor level; At the right-hand member vertical ground fixed cameras 3 of cross bar, make camera lens vertical plane earthward.When not snowing, the central region of video camera is ground D point.The rectangle that the field range of video camera is is summit with ACBE point on ground, snow depth sensor 4 is installed at the P point place of water balance bar and the vertical ground α angle that is tilted to the right, the Infrared that snow depth sensor emission is gone out just in time is penetrated at ground D point, if P point is vertically mapped to N point on ground.And marking rod 5 is set at N point place, the highest snow depth h of marking rod height >; Field survey d and ND.
After snowing, if snow depth is h, the Infrared that snow depth sensor emission goes out should penetrate the μ point on accumulated snow surface, and the central region of video camera is the x point on accumulated snow surface, and namely the central region of video camera and x point also have D point on same perpendicular line.Marking rod 5 passes from accumulated snow surface n point.
But when there being vibrations to occur, such as train passes through, the mounting clamp of snow depth sensor easily loosens, due to gravitational effect, inclined angle alpha can reduce, after vibrations stop, if P point place and tilt alpha angle, vertical ground direction are reduced to β angle, the Infrared that so now snow depth sensor emission goes out is penetrated and is moved to the left to m point in the position on accumulated snow surface by original μ point level, p point is vertically mapped to the n point on accumulated snow surface, in the same horizontal line, p, n and N are on same perpendicular line for μ, m, n and x 4.
Now video camera is taken pictures, obtaining with A ' C ' B ' E ' (respectively corresponding ground ABCE) is the rectangle photo on the accumulated snow surface on summit, can see that the top n' point (corresponding actual field area snow surface position n) of marking rod and infrared ray are mapped to the red some m' point (corresponding actual field area snow surface position m) on accumulated snow surface from photo.If point corresponding with actual place x, m and n on photo is respectively x', m' and n', due to the symcenter point that x' point is exactly photo, therefore distance x'n' can be obtained by measuring photo, because accumulated snow surface x point is to the distance=actual ground D point of n point to the distance of N point, namely xn=DN can obtain the scaling in photo and actual place
owing to can obtain the distance of m' point and x' point by measuring photo, then can be obtained the distance mx of corresponding actual field area snow surface by scaling k, then have nm=nx-mx, wherein nx=ND, ND measure.Due to Pm be exactly the launching site of infrared ray of snow depth sensor injection and infrared ray be mapped to accumulated snow surface point between distance, can be obtained by snow depth sensor, sensor is set to 0 apart from floor level d, angle of inclination beta is set to 0 °, now pm=h, i.e. the infrared ray of snow depth sensor injection equals the snow depth value of sensor measurement to the length Pm on accumulated snow surface.Therefore then pitch angle
β is input in snow depth sensor, by drawing snow depth degree.Snow depth degree of depth h=d-cos β × Pm;
Fig. 2 is the long-range antidote of application snow depth sensor angles and the comparison diagram not using the method and actual snow depth measured value;
Wherein, not with the snow depth value curve that forwarding method of the present invention is measured when the inclination angle beta of actual snow depth sensor and vertical direction changes; The snow depth value curve that forwarding method of the present invention is measured has been used when the inclination angle beta of actual snow depth sensor and vertical direction changes; Horizontal ordinate is the inclination angle beta of actual snow depth sensor and vertical direction, and ordinate measures snow depth value h', and actual snow depth value is h.Can find out, when not calculating snow depth by the inventive method, along with the inclination angle beta of snow depth sensor and vertical direction becomes large gradually, rate of curve is increasing, namely the snow depth value measured and actual snow depth value error increasing, and used the inventive method, along with the inclination angle beta of snow depth sensor and vertical direction becomes large gradually, curve is almost straight line, and the snow depth value namely measured is substantially equal with actual snow depth value.
Claims (5)
1. a snow depth monitoring system of taking precautions against natural calamities, it is characterized in that, vertical pole (1) vertical ground in system is arranged bottom it to be fixed by backing and ground, horizontal cross bar (2) left end is fixed on vertical pole (1) top, video camera (3) vertical ground is fixed on cross bar right-hand member, makes camera lens vertical plane earthward; Install snow depth sensor (4) in water balance bar (2) vertical ground direction, the end place α angle that is tilted to the right that keeps left, the infrared ray that snow depth sensor (4) is penetrated arrives the point on ground and overlaps with the point that video camera (3) optical center is mapped to ground; Be mapped to ground place in the mounting points of snow depth sensor (4) and marking rod (5) is set; When described snow depth sensor (4) will ensure inclined angle alpha=0 °, direction, snow depth sensor vertical ground with the mounting distance of video camera (3), the point on the infrared ray arrival ground of injection is still included in video camera coverage.
2. one according to claim 1 is taken precautions against natural calamities snow depth monitoring system, it is characterized in that described 0 ° of < α <90 °.
3. one according to claim 1 is taken precautions against natural calamities snow depth monitoring system, it is characterized in that, described snow depth sensor can measure the distance between point that the launching site of infrared ray and infrared ray arrive accumulated snow surface automatically.
4. one according to claim 1 is taken precautions against natural calamities snow depth monitoring system, it is characterized in that, the highest snow depth of described marking rod height >.
5., based on the long-range antidote of snow depth sensor angles of described snow depth monitoring system of taking precautions against natural calamities, it is characterized in that, described method comprises the steps:
Step 1: measure the snow depth sensor vertical range to ground, measurement camera lens centralizing mapping to the point on ground and snow depth sensor maps to the point on ground, the distance between these 2;
Step 2: the scale down calculating shot by camera photo and actual place scope;
Step 3: the pitch angle after changing according to scale down calculating snow depth sensor and Vertical Square plane inclination;
Step 4: be input at the pitch angle after the change of calculating in step 3 in snow depth sensor, calculates snow depth value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410459186.7A CN104236475B (en) | 2014-09-10 | 2014-09-10 | One is taken precautions against natural calamities snow depth monitoring system and the long-range antidote of snow depth sensor angles |
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| CN201410459186.7A CN104236475B (en) | 2014-09-10 | 2014-09-10 | One is taken precautions against natural calamities snow depth monitoring system and the long-range antidote of snow depth sensor angles |
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| CN104236475A true CN104236475A (en) | 2014-12-24 |
| CN104236475B CN104236475B (en) | 2016-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084679A (en) * | 2017-03-28 | 2017-08-22 | 无锡信大气象传感网科技有限公司 | The method of measurement snow depth based on laser imaging |
| CN113534297A (en) * | 2021-07-16 | 2021-10-22 | 新疆林科院森林生态研究所 | Device and method capable of accurately monitoring accumulated snow depth of forest in real time |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001083262A (en) * | 1999-09-13 | 2001-03-30 | Yokogawa Electric Corp | Snowfall measuring system |
| CN202562445U (en) * | 2012-03-29 | 2012-11-28 | 中国气象局气象探测中心 | Snow depth multipoint self-operated measuring device based on laser range-finding principle |
| CN103438822A (en) * | 2013-09-11 | 2013-12-11 | 无锡信大气象传感网科技有限公司 | Accumulated snow depth monitoring system based on controllable light source |
-
2014
- 2014-09-10 CN CN201410459186.7A patent/CN104236475B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001083262A (en) * | 1999-09-13 | 2001-03-30 | Yokogawa Electric Corp | Snowfall measuring system |
| CN202562445U (en) * | 2012-03-29 | 2012-11-28 | 中国气象局气象探测中心 | Snow depth multipoint self-operated measuring device based on laser range-finding principle |
| CN103438822A (en) * | 2013-09-11 | 2013-12-11 | 无锡信大气象传感网科技有限公司 | Accumulated snow depth monitoring system based on controllable light source |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084679A (en) * | 2017-03-28 | 2017-08-22 | 无锡信大气象传感网科技有限公司 | The method of measurement snow depth based on laser imaging |
| CN113534297A (en) * | 2021-07-16 | 2021-10-22 | 新疆林科院森林生态研究所 | Device and method capable of accurately monitoring accumulated snow depth of forest in real time |
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| CN104236475B (en) | 2016-09-14 |
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