CN102095944A - Precise prewarning system of direct stroke in protection range - Google Patents
Precise prewarning system of direct stroke in protection range Download PDFInfo
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- CN102095944A CN102095944A CN2010105779038A CN201010577903A CN102095944A CN 102095944 A CN102095944 A CN 102095944A CN 2010105779038 A CN2010105779038 A CN 2010105779038A CN 201010577903 A CN201010577903 A CN 201010577903A CN 102095944 A CN102095944 A CN 102095944A
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Abstract
The invention provides a precise prewarning system of direct stroke in a protection range and relates to a technology for prewarning great natural catastrophes such as direct stroke. The precise prewarning system solves the problems of insufficient effective area where the conventional lightening arresting body is opposite to a thundercloud electric field, and poor prewarning effect. The precise prewarning system mainly comprises the lightening arresting body, a current transformer, a control emitting component, an insulation bracket, a thunder consuming body, an energy supply system, a stand column and a plurality of prewarning receivers; the lightening arresting body, the insulation bracket, the thunder consuming body and the stand column are vertically and fixedly connected with one another sequentially; the stand column is fixed on the ground; the current transformer is connected in series between the lightening arresting body and the thunder consuming body; the inductive output end of the current transformer is connected with the signal input end of the control emitting component; the current transformer and the control emitting component are fixed on the insulation bracket; the energy supply system is connected with the emitting component; and the lightening arresting body is a metal cone. The precise prewarning system has wide application range and is safe and reliable; and the prewarning time has high reliability.
Description
Technical field
The present invention relates to the technology of a kind of major natural disasters direct stroke early warning; can provide accurate early warning at phase of sensitization to forward in the scope of protection zone and side direction direct stroke hazard level; in early warning; can eliminate the direct stroke in the protection domain; specifically, be a kind of thunderbolt early warning system.
Background technology
Directly thunder and lightning is a kind of paroxysmal disaster, and this disaster can cause casualties, property loss.Predict the generation of this disaster in advance, we just can take corresponding workaround, reduce and stop the generation of disaster accident, and accurate early warning of direct stroke and protection are the effective means that reduces lightning hazards in the regional extent.
Direct stroke is as a kind of spontaneous phenomenon; do not go general protection our ability of big scope; also there is no need general protection; concerning us; direct stroke seldom is a disaster also; the thunder and lightning at spacious place; can produce negative aeroion; bring pure and fresh for our environment; this is the positive one side of thunderbolt; to one on a large scale in specific small area; specific building is here arranged; electronic information is arranged; movable personnel are arranged; in this scope, be struck by lightning; will cause damage to us; moreover occurring in this scope of direct stroke is again a small probability event that specified conditions are arranged; in order to prevent the generation of this small probability event; if allow electronic system quit work; allow personnel stop action; can cause the unnecessary protection loss; therefore; to these optimal measures of small area (including the zone of certain limit) with direct stroke protection requirement is that we can predict the time that direct stroke takes place in advance, gives reliably protecting in this time period, reduces unnecessary blindness prevention costs.
Therefore the technology that the direct stroke of a regional extent is carried out accurate early warning and protection is researched and developed and is had crucial social effect and economic benefit.
In earlier stage investigate according to our market, at the technical requirement wide apart of early warning technology method accurate early warning of direct stroke in the scope of the territory, means abscission zone of the disaster effective information of Timing Advance and collection of several direct strokes of present stage marketing at home and abroad:
Conventional weather forecast, it is method with the radar detection thundercloud, judge the possibility of thunderstorm weather, the usable results of this technical method is a probability forecast to large-scale thunderstorm weather, accurate early warning does not have reference value to the direct stroke in the regional extent, and the representative application technology of this technology is a Doppler Lidar System;
A kind of with surveying the technical method that thunderbolt ground dodges radiated electromagnetic wave, the result that this method obtains is that observing and predicting of direct stroke taken place in the somewhere, the usable results of this technical method is the forecast of the indirect lightning strike of detection place, the accurate early warning of direct stroke hazard level in the regional extent of detection place is not had reference value, and the representative application technology of this technology is that the earth ground dodges monitoring system;
A kind of with the technical method that detects Franklin lightning rod discharge current, the usable results of this method only is that the direct stroke that this place has taken place is is observed and predicted, the Timing Advance that does not have early warning to require to the direct stroke of detection place, this technical method does not have reference value to the direct stroke early warning in the regional extent, and the representative application technology essence of this technology is the direct ceraunograph number system of Franklin lightning rod;
Some use the mode of field intensity meter, survey the intensity of space thundercloud electric field in the protection domain, come the degree of risk of the direct stroke in the prewarning area scope with the intensity of space electric field.The proportion that resembles object can not replace the weight of object; the weight of object also will depend on the volume of object; certain any electric field intensity is represented the relative intensity between this point and the thundercloud charge distance in the space; at the regional level; the possibility that direct stroke takes place; not the intensity that singly depends on space thundercloud electric field; also to depend on the ability of being hit subject-induced thundercloud electric field in the protection domain; this ability refers to be hit the ability of subject-induced thundercloud electric field electric flux; general two pacing itemss of interior jobbie generation direct stroke at the regional level: sensing capability and height, the basic meaning of this condition is:
In a regional extent, the position of jobbie is the highest (with thundercloud nearest), but the sensing capability to the thundercloud electric field is very little, the leakage path impedance is very big, as insulator, direct stroke can not take place in this object, direct stroke just may shielding on the stronger object of lower sensing capability, the generation of our usually said shielding accident just.
In a regional extent; the position of jobbie is the highest; sensing capability to the thundercloud electric field is stronger; the leakage path impedance is minimum; direct stroke will hit sudden strain of a muscle with this object, dodges moment hitting, and the surrounding space electric field is hit the short circuit of lightning arc; form the zone that an electric field reduces, thereby direct stroke can not take place in other objects in the protection zone.
And the position that the field intensity meter probe that is used for space exploration thundercloud electric field in these methods is installed considers that the security of itself is not the highest position, the ability of probe induction thundercloud electric field is not the strongest, direct stroke information in this regional extent that collects, can not represent the most dangerous or safest, provide the Timing Advance of alarm to be forbidden by its default numerical value, therefore it can not carry out accurate early warning to the direct stroke in the regional extent, and the representative application technology myopia of this technology is the telluric electricity field monitoring system;
These early warning technologies commonly used all can not reach the technical requirement of the accurate early warning of direct stroke and protection in the regional extent, and the deficiency that this early warning project exists according to these early warning products is as the invention foundation.
Summary of the invention
Technical matters to be solved by this invention: it is not enough over against the useful area of thundercloud electric field that body is dodged in traditional connecing; the problem of early warning weak effect; the accurate early warning system of direct stroke in a kind of protection domain is provided, and it connects the sudden strain of a muscle body and has a kind of forward of maximum and the structure and the early warning precision height of side direction effective surface area.
The technical solution used in the present invention is: the accurate early warning system of direct stroke in a kind of protection domain, and mainly dodge body, current transformer, control emitting module, insulating support, consumption thunder body, the energy system, column and a plurality of early warning receiver are provided by connecing; Described connecing dodged body, insulating support, consumption thunder body and vertically fixedlyed connected successively with column, and column is fixed on the ground, described current transformer is serially connected with to connect and dodges between body and the consumption thunder body, the output terminal of current transformer is connected with the input end of control emitting module, current transformer and control emitting module are fixed on the insulating support, the energy provides system to be connected on the emitting module, describedly connects that to dodge body be the round metal cone.
This early warning system; the powerful consumption thunder body assembly of serial connection after connecing sudden strain of a muscle body summation current transformer; dodge the thunder and lightning potential energy that body is responded to from connecing; mode with high potential, little electric current consumes; this consumption ways has been eliminated the sudden strain of a muscle condition of hitting that produces the big electric current of direct stroke on the early warning system; because this early warning system is installed in the highest point of protection early warning system; if to other common induction type prevention eliminating needle of reasonable Arrangement in the whole regional extent that needs protection; just can eliminate the direct stroke in the protection domain, play the desirable thunder protective effect that disappears.
Connecing the sudden strain of a muscle body is the round metal cone, have a kind of forward of maximum and the structure of side direction effective surface area, connect and dodge body under the effect of thundercloud perpendicular to the vector field electric flux on surface, produce maximum induced charge on the surface, this induced charge produces the induced field strength perpendicular to the surface on the surface, dodge body and have maximum induced field strength thereby make to connect, take into account the effective surface area of forward and side direction simultaneously, dodge body and have the maximum induction forward and the ability of side direction thundercloud electric flux thereby make to connect.
As preferably, it is the solar DC electric power system that the described energy provides system, comprises solar powered plate and the solar power supply circuit that is attached thereto, and described solar DC electric power system is rack-mount.
As preferably, described control emitting module comprises preset value circuit and the testing circuit that is connected successively, amplifying circuit, comparator circuit, radiating circuit; The signal input part of testing circuit is connected with the output terminal of current transformer, and the output terminal of preset value circuit is connected with an input end of comparator circuit.
It is the highest in the regional extent of protection that pyramid type connects the position of dodging the body installation; the direct thunder and lightning danger signal of its induction is the strongest in the regional extent of protection early warning; can have the reference value of early warning as the early warning comparison signal of direct stroke danger with this strongest real-time signal; the inductive energy that this produces at phase of sensitization; connect the corresponding induced voltage of current transformer induction output that dodges behind the body by being set directly at; this induced voltage is after processing of circuit and amplifying circuit amplify after testing; early warning preset value with the early warning signal emitting module compares again; when reaching, signal reports to the police when requiring; assembly sends warning initial wireless signal; this signal is received by alarm assemblies; system requires to report to the police according to the environment type of alarm; reminds people in the dangerous time, is not left the safe range of protection at direct stroke.
The beneficial effect that the present invention obtains is:
The present invention connects the sudden strain of a muscle body and has the effective surface area of side direction and forward; produce maximum induced charge from the teeth outwards; the induced field strength that this induced charge produces has the maximum thunder ability of drawing; and the installation site is the highest; the thunder and lightning danger signal that assurance is obtained is maximum in the regional extent of protection; the requirement of the Timing Advance that realizing accurately reports to the police needs; utilize the way of the high-power consumption thunder body of serial connection; eliminated the direct stroke in the protection domain, the direct stroke hazard level early warning in the regional extent under this reliably protecting prerequisite can come interim at direct stroke; prior notice people;, arrive in the regional extent of safety in the dangerous time at direct stroke, or in the safe range of the protection that do not make off; it is low to have the cost of evading; wide accommodation, system itself is safe and reliable, the pre-warning time high reliability features.
Description of drawings
Fig. 1 is a system construction drawing of the present invention;
Fig. 2 is a signal transfer principle block diagram of the present invention;
Among the figure: 1, connect the sudden strain of a muscle body, 2, current transformer, 3, the control emitting module, 4, insulating support, 5, consumption thunder body, 6, the solar DC electric power system, 7, column, 8, the early warning receiver, 9, ground.
Embodiment
Below in conjunction with accompanying drawing be that the present invention is further illustrated specifically.
Embodiment: the accurate early warning system of direct stroke (referring to accompanying drawing 1,2) in a kind of protection domain, mainly dodge body 1, current transformer 2, control emitting module 3, insulating support 4, consumption thunder body 5, the energy system, column 7 and a plurality of early warning receiver 8 are provided by connecing; Described connecing dodged body 1, insulating support 4, consumption thunder body 5 and vertically fixedlyed connected successively with column 7, and column 7 is fixed on the ground 9, described current transformer 2 is serially connected with to connect and dodges between body 1 and the consumption thunder body 5, the output terminal of current transformer 2 is connected with the input end of control emitting module 3, current transformer 2 and control emitting module 3 are fixed on the insulating support 4, the energy provides system to be connected on the emitting module, and the described sudden strain of a muscle body 1 that connects is the round metal cone.
Wherein system is provided is solar DC electric power system 6 to the energy, comprises solar powered plate and the solar power supply circuit that is attached thereto, and solar DC electric power system 6 is installed on the insulating support.
Described control emitting module 3 comprises preset value circuit and the testing circuit that is connected successively, amplifying circuit, comparator circuit, radiating circuit; The signal input part of testing circuit is connected with the output terminal of current transformer, and the output terminal of preset value circuit is connected with an input end of comparator circuit.
With reference to Fig. 1; described a kind of early warning system with forward and side direction sensing capability connects sudden strain of a muscle body 1 and is cone; this connects sudden strain of a muscle body 1 installation site in the early warning range of protection is the highest; its induction takes into account the effective surface area of side direction (four sides) and forward simultaneously; the thundercloud vector field acts on to connect perpendicular to the component of surface area dodges body 1; make directed the moving of free electron in the surface area; produce induced charge on the surface; by the energy of position of thundercloud electric field action in the charges of different polarity that connect the generation of sudden strain of a muscle body 1 lower surface; directly act on connecing and dodge the current transformer 2 that body 1 lower surface links to each other; induction output terminal at current transformer 2 has induced signal output; these induced signal Be Controlled emitting module 3 signals amplify; and and default warning numerical value contrast; when reaching the warning required value; induced signal is through wireless the transmitting of control emitting module 3 outputs; early warning signal receiving unit 8 independent installations; the early warning signal receiving unit receives the wireless command signals of control emitting module 3 with wireless mode; alarm unit is in time reported to the police; remind protection domain personnel on every side to take care; in the safe range of protection, evade the danger of direct stroke; the insulating support 4 that current transformer 2 is installed in consumption thunder body 5 that summation current transformer 2 other ends link to each other and support joins; consumption thunder body 5 adopts high potential; the mode of little electric current consumes induction lightening potential energy; the direct stroke that the mode of this little electric current can be eliminated in the protection domain may; solar energy system 6 is installed on the insulating support on consumption thunder body 5 tops; for control emitting module 3 provides electric energy separately; the insulation of 5 bottoms is connected the early warning system support with consumption thunder body; native system itself is safe and reliable; the hidden danger that does not have direct stroke; the time of fire alarming lead can be before the hazard level of direct stroke somewhat and between tens seconds in advance; this pre-warning time is the best pre-warning time that people make corresponding reflection; owing to direct stroke does not take place on early warning system, can not exert an influence to environment on every side.
The scope interior accurate early warning system of direct stroke hazard level in one's respective area is adapted at personnel such as school, station, square, parking lot, scenic spot and concentrates the occasion that flows to apply.
Claims (3)
1. the accurate early warning system of direct stroke in the protection domain is characterized in that: it mainly dodges body, current transformer, control emitting module, insulating support, consumption thunder body, the energy and provides system, column and a plurality of early warning receiver to form by connecing; Described connecing dodged body, insulating support, consumption thunder body and vertically fixedlyed connected successively with column, and column is fixed on the ground, described current transformer is serially connected with to connect and dodges between body and the consumption thunder body, the output terminal of current transformer is connected with the input end of control emitting module, current transformer and control emitting module are fixed on the insulating support, the energy provides system to be connected on the emitting module, describedly connects that to dodge body be the round metal cone.
2. the accurate early warning system of direct stroke in a kind of protection domain according to claim 1; it is characterized in that: it is the solar DC electric power system that the described energy provides system; comprise solar powered plate and the solar power supply circuit that is attached thereto, described solar DC electric power system is rack-mount.
3. the accurate early warning system of direct stroke in a kind of protection domain according to claim 1, it is characterized in that: described control emitting module comprises preset value circuit and the testing circuit that is connected successively, amplifying circuit, comparator circuit, radiating circuit; The signal input part of testing circuit is connected with the output terminal of current transformer, and the output terminal of preset value circuit is connected with an input end of comparator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010577903 CN102095944B (en) | 2010-12-08 | 2010-12-08 | Precise prewarning system of direct stroke in protection range |
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| CN 201010577903 CN102095944B (en) | 2010-12-08 | 2010-12-08 | Precise prewarning system of direct stroke in protection range |
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| CN102095944A true CN102095944A (en) | 2011-06-15 |
| CN102095944B CN102095944B (en) | 2013-04-03 |
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| CN 201010577903 Active CN102095944B (en) | 2010-12-08 | 2010-12-08 | Precise prewarning system of direct stroke in protection range |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594931A (en) * | 2013-07-05 | 2014-02-19 | 山东科技大学 | Active type microwave induction lightning protection system |
| CN103682989A (en) * | 2013-12-27 | 2014-03-26 | 银川锦天乐防雷技术有限公司 | Lightning-protection device and lightning-protection method |
| CN106501623A (en) * | 2016-11-03 | 2017-03-15 | 山东农业大学 | Multi-rotor unmanned aerial vehicle Lightning disservice measurement apparatus and multi-rotor unmanned aerial vehicle |
| CN108629493A (en) * | 2018-04-17 | 2018-10-09 | 广州中国科学院工业技术研究院 | Storage tank lightning strike accident risk analysis method, system and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU625891B1 (en) * | 1990-04-27 | 1992-07-16 | Central Lightning Protection Co. Ltd. | Thunder alarm device |
| JP2003149349A (en) * | 2001-11-07 | 2003-05-21 | Aitesu:Kk | Lightning alarm device and lightning alarm method |
| CN1811477A (en) * | 2006-02-15 | 2006-08-02 | 上海涌能电力科技发展有限公司 | Lightning arrester leakage current and action frequency real-time monitoring system |
| CN101136544A (en) * | 2007-08-23 | 2008-03-05 | 叶林 | Lightning arrester |
| KR100931704B1 (en) * | 2009-03-27 | 2009-12-14 | 주은전기산업(주) | System for lightning strike alarm |
| CN201368897Y (en) * | 2009-02-10 | 2009-12-23 | 中国科学院空间科学与应用研究中心 | Thunder alarm instrument based on time-varying electromagnetic field effect |
| CN201387990Y (en) * | 2008-07-23 | 2010-01-20 | 叶林 | Lightning rod arrester with forward-direction and side-direction lightning striking capacity |
| CN201926717U (en) * | 2010-12-08 | 2011-08-10 | 桐庐科瑞电子科技有限公司 | Accurate warning system for direct lightning stroke within protection scope |
| CN102354910A (en) * | 2011-09-20 | 2012-02-15 | 桐庐峰云科技有限公司 | Induced lightning conductor |
-
2010
- 2010-12-08 CN CN 201010577903 patent/CN102095944B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU625891B1 (en) * | 1990-04-27 | 1992-07-16 | Central Lightning Protection Co. Ltd. | Thunder alarm device |
| JP2003149349A (en) * | 2001-11-07 | 2003-05-21 | Aitesu:Kk | Lightning alarm device and lightning alarm method |
| CN1811477A (en) * | 2006-02-15 | 2006-08-02 | 上海涌能电力科技发展有限公司 | Lightning arrester leakage current and action frequency real-time monitoring system |
| CN101136544A (en) * | 2007-08-23 | 2008-03-05 | 叶林 | Lightning arrester |
| CN201387990Y (en) * | 2008-07-23 | 2010-01-20 | 叶林 | Lightning rod arrester with forward-direction and side-direction lightning striking capacity |
| CN201368897Y (en) * | 2009-02-10 | 2009-12-23 | 中国科学院空间科学与应用研究中心 | Thunder alarm instrument based on time-varying electromagnetic field effect |
| KR100931704B1 (en) * | 2009-03-27 | 2009-12-14 | 주은전기산업(주) | System for lightning strike alarm |
| CN201926717U (en) * | 2010-12-08 | 2011-08-10 | 桐庐科瑞电子科技有限公司 | Accurate warning system for direct lightning stroke within protection scope |
| CN102354910A (en) * | 2011-09-20 | 2012-02-15 | 桐庐峰云科技有限公司 | Induced lightning conductor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594931A (en) * | 2013-07-05 | 2014-02-19 | 山东科技大学 | Active type microwave induction lightning protection system |
| CN103682989A (en) * | 2013-12-27 | 2014-03-26 | 银川锦天乐防雷技术有限公司 | Lightning-protection device and lightning-protection method |
| CN103682989B (en) * | 2013-12-27 | 2015-09-30 | 银川锦天乐防雷技术有限公司 | Lightning proof device and lightning proof method |
| CN106501623A (en) * | 2016-11-03 | 2017-03-15 | 山东农业大学 | Multi-rotor unmanned aerial vehicle Lightning disservice measurement apparatus and multi-rotor unmanned aerial vehicle |
| CN108629493A (en) * | 2018-04-17 | 2018-10-09 | 广州中国科学院工业技术研究院 | Storage tank lightning strike accident risk analysis method, system and storage medium |
| CN108629493B (en) * | 2018-04-17 | 2021-02-26 | 广州中国科学院工业技术研究院 | Storage tank lightning stroke accident risk analysis method and system and storage medium |
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| CN102095944B (en) | 2013-04-03 |
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Effective date of registration: 20171013 Address after: 311500 B, Tonglu science and Technology Incubation Park, No. 199, Nan Zhou Nan Road, Tonglu Economic Development Zone, Tonglu, Zhejiang, Hangzhou, 202-040 Patentee after: Hangzhou Wan Jing Lightning Protection Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 311500 street Tonglu Tongjun Ocean State Road No. 28 Patentee before: Tonglu Kerui Electronic Technology Co., Ltd. |