CN104483519A - Trigger-based thunder and lightning signal triggering system and method - Google Patents
Trigger-based thunder and lightning signal triggering system and method Download PDFInfo
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Abstract
The invention discloses a trigger-based thunder and lightning signal triggering system and a trigger-based lightning signal thunder and triggering method. The system comprises a broadband antenna module, a signal conditioning module and a signal triggering module, wherein the broadband antenna module is used for receiving a photo-electro-magnetic signal generated by thunder and lightning, converting the photo-electro-magnetic signal into an electric signal, and inputting the electric signal to the signal conditioning module; the signal conditioning module is used for receiving the electric signal transmitted by the broadband antenna module, processing the electric signal, and inputting the processed electric signal to a window comparator module and an A/D (Analogue/Digital) conversion module; the signal triggering module comprises a waveform characteristic extraction unit, a triggering process judgment unit, a multi-logic operation unit and a function setting unit, and is used for receiving the electric signal processed by the window comparator module and the A/D conversion module, extracting waveform characteristics of the electric signal, and outputting a triggering signal to a square wave generator according to the waveform characteristics when a triggering condition is met. The system is high in selectivity and extensibility, stable, convenient, easy to carry, and can further be used in the fields of thunder and lightning counting, return stroke positioning and the like, disk resources are saved, and the thunder and lightning detection efficiency is improved.
Description
Technical field
The present invention relates to meteorological observation field, be specifically related to a kind of thunder and lightning signal trigger triggering system and method.
Background technology
Thunder and lightning is a kind of superpower electric discharge phenomena in air, has the feature of big current, strong electromagnetic radiation, can produce strong disaster, usually causes the accidents such as forest fire, oil depot blast, power failure, communication failure, damage of facilities.Lightning Electromagnetic Fields feature can react the inherent mechanism of lightning discharge, is to illustrate Lightning electromagnetic radiation to the mechanism of action of electronic equipment, the important foundation evaluating protective benefits, research Lightning Electromagnetic Pulse safeguard procedures.Lightning electromagnetic signal detection is the important tool of lightning intrusion always.
The detection of thunder and lightning signal generally comprises acquisition sensor and signal acquisition and control device, and main application data capture card realizes analog to digital conversion and the triggering collection preservation of simulating signal.Although most capture card all has certain hardware trigger function, this function is fairly simple, mainly based on the mode such as edging trigger, level triggers.Although the Trigger Function of complexity can trigger with software and realize, software triggers general based on computer platform, can take larger processor computing power simultaneously, thus affect the real-time of sampling and processing.In addition, consider the collection demand of signal specific in the complicacy of lightning signal and research work, hardware based complicated triggering mode implementation method and technology particularly necessary.
Summary of the invention
For defect of the prior art, the invention provides a kind of thunder and lightning signal trigger triggering system and method, this system achieve to the complexity of input, thunder discharge signal at a high speed carries out the triggering of many processes.
First aspect, the invention provides a kind of thunder and lightning signal trigger triggering system, comprising:
Wideband antenna module, for receiving the photoelectromagnetic signal that thunder and lightning produces, and is input to Signal-regulated kinase after described photoelectromagnetic signal is converted into electric signal;
Described Signal-regulated kinase, for receiving the electric signal of described wideband antenna module transmission, is input to window comparator module and A/D modular converter to described electric signal after processing;
Signal trigger module, comprise waveshape feature abstraction unit, trigger process judging unit, many arithmetic logic unit and function setting unit, for receiving the electric signal after described window comparator and described A/D module processing, extract the ripple feature of described electric signal, and export trigger pip when meeting trigger condition to square-wave generator according to described ripple feature;
Square-wave generator, for the trigger pip that Received signal strength trigger module exports, and produces controlled criteria triggers signal output.
Optionally, described system also comprises the reset circuit, electric source filter circuit, download circuit, outer clock circuit and the sopc sheet external expansion circuit that are connected with described signal trigger module.
Optionally, described system also comprises the matrix keyboard circuit module and liquid crystal display circuit module that are connected with described signal trigger module.
Optionally, described waveshape feature abstraction unit in described signal trigger module is connected with A/D modular converter with described window comparator module, described trigger process judging unit is connected with described waveshape feature abstraction unit, described many arithmetic logic unit are connected with described trigger process judging unit, and described function setting unit is connected with described trigger process judging unit;
Described trigger process judge module, parameter also for the parameter of described ripple feature and function setting unit being set compares, comparative result is sent to many arithmetic logic unit, to make described many arithmetic logic unit analyze according to described comparative result, judge whether to meet trigger condition.
Optionally, described waveshape feature abstraction unit comprise rise time judgment sub-unit, peak-seeking algorithm subelement, fall time judgment sub-unit and full width at half maximum computation subunit, extract rising time, negative edge time and full width at half maximum respectively;
Described peak-seeking algorithm subelement is connected with described rise time judgment sub-unit, and described fall time, judgment sub-unit was connected with described peak-seeking algorithm subelement, and described full width at half maximum computation subunit is connected with judgment sub-unit described fall time;
Described rise time judgment sub-unit, for judging whether described electric signal rises, calculates lifting height Δ h in Δ t simultaneously;
Described peak-seeking algorithm subelement, for continuing the value according to Δ h/ Δ t, judging whether Δ h/ Δ t polarity changes, thus judging whether peaking;
Described fall time, judgment sub-unit, for judging whether described electric signal declines, calculated falling head Δ h in Δ t simultaneously;
Described full width at half maximum computation subunit, after peak value being detected, find out rising edge and arrive half peak value moment t0, find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously.
Optionally, described trigger process judging unit comprises counterattack triggers unit, initial breakdown electric discharge triggers unit, continuous current triggers unit, K discharge process triggers unit, M component triggers unit and NBE triggers unit.
Optionally, described square-wave generator is connected with the many arithmetic logic unit in described signal trigger module, when many arithmetic logic unit logic is true time, outputs signal to square-wave generator, produces the trigger pip of standard.
Second aspect, present invention also offers a kind of thunder and lightning signal trigger triggering method, comprising:
Wideband antenna module receives the photoelectromagnetic signal that thunder and lightning produces, and described photoelectromagnetic signal is converted into input signal conditioning module after electric signal;
Described Signal-regulated kinase receives the described electric signal of described wideband antenna module transmission, is input to window comparator module and A/D modular converter to described electric signal after processing;
Signal trigger module receives the electric signal after described window comparator and described A/D module processing, extracts the ripple feature of described electric signal, and exports trigger pip when meeting trigger condition to square-wave generator according to described ripple feature;
The trigger pip that square-wave generator Received signal strength trigger module exports, and produce controlled criteria triggers signal output.
Optionally, the ripple feature of described extraction electric signal, comprising:
Judge whether described photoelectromagnetic electric signal rises, calculate lifting height Δ h in Δ t simultaneously, if when Δ h/ Δ t is greater than setting threshold value, be decided to be beginning rising time;
According to the value of Δ h/ Δ t, judge whether the change in polarity of Δ h/ Δ t arrives peaking; Judge whether described photoelectromagnetic electric signal declines, calculate falling head Δ h in Δ t simultaneously, if when Δ h is greater than setting threshold value divided by Δ t, is decided to be and starts the moment that declines;
After peak value being detected, find out rising edge and arrive half peak value moment t0, find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously;
Rise time of described photoelectromagnetic electric signal, fall time and full width at half maximum are the ripple feature of the described electric signal of extraction.
Optionally, described method also comprises: judge whether trigger condition according to described ripple feature:
The parameter that the parameter of described ripple feature and function setting unit set compares by described trigger process judge module, comparative result is sent to many arithmetic logic unit, to make described many arithmetic logic unit analyze described comparative result, judge whether to meet trigger condition.
As shown from the above technical solution, a kind of thunder and lightning signal trigger triggering system provided by the invention and method, this system is to the quick of input and the thunder and lightning trigger pip of complexity realizes many processes Trigger Function, as window triggers, fight back and trigger, initial breakdown electric discharge triggers, Continuous current process triggers, K discharge process triggers, M component triggers, NBE triggers, and then can for specific thunder and lightning signal waveform as whole thunder and lightning waveform, fight back waveform, initial breakdown discharge process waveform, Continuous current process waveform, K discharge process waveform, M component waveform, NBE waveform optionally triggers output, this systems allow selective is strong, saved disk resource and equipment stable, easy, should take, this system expandability is strong, can also be used for thunder and lightning counting, fight back the fields such as location, improve the detection efficiency of thunder and lightning.
In instructions of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme, it all should be encompassed in the middle of the scope of claim of the present invention and instructions.
Accompanying drawing explanation
The structural representation of a kind of thunder and lightning signal trigger triggering system that Fig. 1 provides for one embodiment of the invention;
The structural representation of the signal trigger module triggering thunder and lightning signal that Fig. 2 provides for one embodiment of the invention;
The structural representation of the signal trigger module extraction signal waveform characteristic parameter that Fig. 3 provides for one embodiment of the invention;
The schematic flow sheet of a kind of thunder and lightning signal trigger triggering method that Fig. 4 provides for one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Lightning mainly comprises normal incidence sudden strain of a muscle and negative ground dodges and cloud dodges, and lightning discharge process is very complicated, comprises a lot of muon physics discharge process: initial breakdown process, fights back process, Continuous current process, K discharge process, M component processes etc.The pulse of initial breakdown process is identical with Return stroke of ground flash electric field change polarity subsequently, and totally for bipolarity is feature, the time rising to peak value is 10us, it is superimposed with the pulse that width is 2 ~ 3us, second half then changes gently, and pulsewidth is 41.0us, and the time interval between pulse is 130us; Counterattack comprise fight back first and continue after hit, fight back first and continue after fight back initial spike (V/m) mean value normalizing to 100km and be respectively 5.8-10.2,3.6-6.0; Zero-crossing timing (us) mean value is respectively 2.4-7.0,1.2-2.8; Slow forward position duration (us) mean value is respectively 2.9-9.4,0.6-4.3; Slow forward position and peak percentage mean value are respectively 20-60,10-30; Fast conversion (10-90) % time (ns) mean value is respectively 90-200,150-200; (10-90) % time (us) mean value is respectively 2.6,1.5; Continuous current process be in thunder cloud local charged centers after launch aing surprise attack along lightning channel continuous discharge process over the ground, be divided into the short Continuous current process being greater than the long Continuous current process of 40ms, the medium continuous current of 10-40ms and 1-10ms.Continuous current size is between 50-580A, and continuous current is maximum in beginning, and reduces gradually in time; K process be to occur between Return stroke of ground flash or last fight back after and cloud dodge later stage relatively little fast electric field change, the geometrical mean of duration is the time interval geometrical mean between 0.7ms, K change is 13ms, and discharge current is 1 ~ 4kA; The unexpected increase of M component adjoint passage Weak-luminescence stage channel luminance after counterattack process, and be attended by the fast change of electric field.M component with duration shorter U-shaped (or hook-shaped) electric field change for principal character, namely start with negative electric field change in the M component electrical field change closely observed, and then be a bigger positive electric field change, the 1/15-1/100 of electric field change is normally fought back in the change of its electrostatic field.Whole U-shaped process lasts 200-800us, can produce one or more M component after once counterattack process.The geometrical mean of M change duration is the time interval geometrical mean that 2.1us, M change is 2.1ms; NBE (Narrow Bipolar) has positive and negative polarity, and NBE basic characteristics are: extremely narrow width, greatly peak value and isolatism.The Average pulse width of positive and negative polarity NBE is respectively 6.42 μ s and 5.46 μ s, and the pulse width of positive polarity NBE more easily occurs maximum value, and its maximal value is 19.76 μ s.The isolatism of NBE is obvious, has respectively in the 1s of the NBE of 73.5% and 78.5% after it occurs and before occurring and does not have other any trigger events.From the concrete discharge characteristic of the electron discharge process above-mentioned lightning discharge process, its complicacy of discharging can being found out, in order to obtain the data of specific lightning discharge subprocess, needing more targetedly, more complicated trigger means.
System of the present invention carries out triggering the thunder and lightning signal detection system exported for thunder discharge signal at a kind of being applicable to.This system can carry out the output of many triggering modes to thunder and lightning signal waveform, and then extracts counterattack waveform, initial breakdown discharge waveform, continuous current waveform, K discharge process waveform, M component waveform, NBE waveform etc.Also can be used for thunder and lightning counting, fight back the fields such as location.
The structural representation of a kind of thunder and lightning signal trigger triggering system that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, this system comprises:
Wideband antenna module 11, for receiving the photoelectromagnetic signal that thunder and lightning produces, and is input to Signal-regulated kinase after described photoelectromagnetic signal is converted into electric signal;
Concrete, wideband antenna module is connected with Signal-regulated kinase, comprises exploring antenna and photoelectromagnetic receiver, and exploring antenna is for detecting photoelectromagnetic variable signal when lightning occurs; Photoelectromagnetic receiver, for receiving the process photoelectromagnetic variable signal that records of antenna and being converted into electric signal.
Described Signal-regulated kinase 12, for receiving the electric signal of described wideband antenna module transmission, is input to window comparator module 21 and A/D modular converter 22 to described electric signal after processing;
Concrete, Signal-regulated kinase input is connected with wideband antenna module, and export and be connected with A/D modular converter and window comparator, the effect of this module is nursed one's health the electric signal that broad-band antenna transmits, to reduce the noise of the input signal source of A/D modular converter.
Above-mentioned to electric signal process specifically comprise to wideband antenna module transmission original analog carry out the computings such as filtering, decay, amplification, make it meet the input requirements of A/D modular converter and carry out the requirement of window comparator module.
Wherein, the input of A/D modular converter is connected with Signal-regulated kinase, exports and is connected with signal trigger module, and the effect of this module carries out analog to digital conversion to the analog electrical signal of input, and output digit signals processes to signal trigger module.Wherein, this module comprises two-way sampling channel; The one thick sampling channel in road, for being converted into rough digital signal by simulating signal; One tunnel essence sampling channel, for being converted into meticulous digital signal by simulating signal.
The input of window comparator module is connected with Signal-regulated kinase, exports and is connected with signal trigger module, and this module effect carries out window triggering to the signal satisfied condition of input.
Signal trigger module 13, comprise waveshape feature abstraction unit, trigger process judging unit, many arithmetic logic unit and function setting unit, for receiving the electric signal after described window comparator and described A/D module processing, extract the ripple feature of described electric signal, and export trigger pip when meeting trigger condition to square-wave generator 23 according to described ripple feature.
Concrete, the signal trigger module in the embodiment of the present invention adopts FPGA to be main control chip.FPGA main control chip is used for the real-time operation and the process that the digital waveform signal received are realized lightning sophisticated signal, extracts waveform character and carries out differentiating whether this waveform belongs to specific discharge process, meets criterion, outputs signal to waveform generating module.
Square-wave generator 23, for the trigger pip that Received signal strength trigger module exports, and produces controlled criteria triggers signal output.
Described square-wave generator 23 is connected with the many arithmetic logic unit 133 in described signal trigger module 13, for exporting trigger pip.
Said system achieves broadband lightning signal and inputs and have the dedicated trigger modes such as window triggers, lightning counterattack triggering, lightning initial breakdown trigger action, and there is the thunder and lightning special signal trigger that standard Transistor-Transistor Logic level exports, to the complexity of input, thunder discharge signal at a high speed carries out the triggering of many processes, improves the detection efficiency of thunder and lightning.
In specific implementation process, wideband antenna module comprises further: exploring antenna, for detecting various signals when lightning occurs; Photoelectricity electro-magnetic receiver, for the various signals that receiving antenna records, and is translated into electric signal.The signal wherein received can be electromagnetic field or optical radiation signal, and broad-band antenna can be plate aerial, biconical antenna, whip antenna, discone antenna and photodetection sensor.
Window comparator module comprises further: hypervelocity two-way comparer, triggers for realizing window; Trigger, for adjusting the output pulse width of hypervelocity two-way comparer, making it meet and triggering needs;
Described system also comprises the reset circuit 14, electric source filter circuit 15, download circuit 16, outer clock circuit 17 and the sopc sheet external expansion circuit 18 that are connected with described signal trigger module.
In a particular application, described system also comprises the matrix keyboard circuit module 19 and liquid crystal display circuit module 20 that are connected with described signal trigger module 13.
Signal trigger module is as core main control unit, and with A/D modular converter, window comparator module, LCD MODULE, matrix keyboard module, reset circuit module, electric source filter circuit module, download circuit module, outer clock circuit module is connected.The effect of this module mainly carries out logic identification process to the complicated thunder and lightning signal of input.By comparing the various parameters of pulse waveform characteristic parameter and the setting recorded, thus carry out triggering output, as Fields of Lightning Return Stroke waveform, initial breakdown waveform, NBE event waveforms etc. for specific thunder and lightning signal waveform process.
Reset circuit module is connected with signal trigger module, and the effect of this module adopts hand-reset to avoid program fleet, occurs endless loop problem.This reset circuit drags down level by spring button ground connection and realizes resetting.
Electric source filter circuit module is connected with power supply and signal trigger module, and the effect of this module is that the unidirectional pulsating volage come from ac voltage rectifier is become DC voltage with a small amount of ripple, is supplied to the mu balanced circuit of back as operating voltage.
Download circuit module is connected with signal trigger module, the effect of this module by download program good for software programming in fpga chip, executive routine function.Comprise the in-circuit emulation download circuit of JTAG mode and the download circuit of AS mode.
Outer clock circuit module is connected with signal trigger module, and the effect of this module provides clock signal by active crystal oscillator to signal trigger module.
Square-wave generator module is connected with signal trigger module, for the modulated output of trigger instants TTL signal;
Sopc sheet external expansion circuit module is connected with signal trigger module, comprises the peripheral circuits such as EEPROM, FLASH, SDRAM, and the effect of this module carries out real-time computing and process for buffer memory and to the thunder and lightning complicated digital signal waveform received.
Matrix keyboard module is connected with signal trigger module, and the effect of this module carries out correlation parameter as window activation threshold value, initial breakdown activation threshold value, and fight back activation threshold value, logical operation condition, the parameters such as square wave generation width set.This parameter judges to compare with the parameter of pulse waveform feature extraction by trigger process, and comparative result gives the computing of many Trigger Logic; By the mode of mechanical key, the digital electric signal of parameters is passed to signal trigger module.
LCD MODULE is connected with signal trigger module, effect for this module of parameter of display matrix Keysheet module adjustment shows the related setting parameter of system, as window activation threshold value, initial breakdown activation threshold value, fight back activation threshold value, logical operation condition, the parameters such as square wave generation width.
The structural representation of the signal trigger module triggering thunder and lightning signal that Fig. 2 provides for one embodiment of the invention, as shown in Figure 2, described signal trigger module 13 comprises waveshape feature abstraction unit 131, trigger process judging unit 132, many arithmetic logic unit 133 and function setting unit 134;
Described waveshape feature abstraction unit 131 is connected with A/D modular converter 22 with described window comparator module 21, described trigger process judging unit 132 is connected with described waveshape feature abstraction unit 131, described many arithmetic logic unit 133 are connected with described trigger process judging unit 132, and described function setting unit 134 is connected with described trigger process judging unit 132.
Thunder and lightning signal is through the signal after signal condition, and it is the signal source of carrying out subsequent treatment, and the effect of A/D modular converter is that simulating signal is converted to digital signal, processes for signal trigger module; The signal that satisfy condition of window comparator module to input triggers first, and signal trigger module carries out subsequent treatment after trigger pip having been detected.
The effect of pulse waveform feature extraction extracts the parameters such as signal elevating time, fall time, full width at half maximum.
Trigger process judging unit is used for the parameter of the characteristic parameter recorded and setting to compare, to differentiate class of procedure;
Function setting unit transmits signalization for receiving process matrix keyboard, preserved and passed to correlation module to export, also for setting the parameter of correlated process, this parameter is compared by the parameter of trigger process judging unit and waveshape feature abstraction unit, and comparative result gives many arithmetic logic unit;
The comparative result of many arithmetic logic unit to input is comprehensively analyzed, and according to the logical relation pre-set, carries out the triggering of many processes, exports trigger pip.
In a particular application, described trigger process judging unit 132 comprises not shown counterattack triggers unit 1321, initial breakdown electric discharge triggers unit 1322, continuous current triggers unit 1323, K discharge process triggers unit 1324, M component triggers unit 1325 and NBE triggers unit 1326.
The structural representation of the signal trigger module extraction signal waveform characteristic parameter that Fig. 3 provides for one embodiment of the invention, as shown in Figure 3, waveshape feature abstraction unit 131 comprise rise time judgment sub-unit 1311, peak-seeking algorithm subelement 1312, fall time judgment sub-unit 1313 and full width at half maximum computation subunit 1314;
Described peak-seeking algorithm subelement 1312 is connected with described rise time judgment sub-unit 1311, described fall time, judgment sub-unit 1313 was connected with described peak-seeking algorithm subelement 1312, and described full width at half maximum computation subunit 1,314 1313 to be connected with judgment sub-unit described fall time.
In a particular application, window comparator: the waveform in window is triggered.
Open threshold values judgment sub-unit: trigger higher than during noise signal thresholding amplitude, in order to filtered noise, control to start rise time judgement simultaneously.
Rise time judgment sub-unit: inputted by digital signal, is done to judge whether thunder and lightning signal rises after piecewise interpolation calculates, calculates lifting height Δ h in Δ t simultaneously, if when Δ h is greater than setting threshold value divided by Δ t, be decided to be beginning rising time.
Peak-seeking algorithm subelement: adopt and judge that the change in polarity of Δ h/ Δ t judges whether peaking.When Δ h/ Δ t arrives positive peak by illustrating when just becoming negative, when Δ h/ Δ t becomes timing explanation arrival negative peak by bearing.
Fall time judgment sub-unit: inputted by digital signal, do piecewise interpolation calculate after judge whether thunder and lightning signal descends falling-rising, calculate falling head Δ h in Δ t simultaneously, if Δ h divided by Δ t be greater than set threshold value time, be decided to be and start the moment that declines.
Full width at half maximum computation subunit: after peak value being detected, finds out rising edge and arrives half peak value moment t0, and find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously.
The cardinal principle of said system is: after wideband antenna module receives signal, through Signal-regulated kinase, hypervelocity window comparator module is given on one tunnel, A/D modular converter is given on another road, if window comparator module has signal to export, then the FPGA main control chip of signal trigger module controls the thick sampling channel opening A/D modular converter immediately, adopts to obtain data, judge whether it is false triggering according to thick sampling channel.If triggered as normal, then close thick sampling channel, open smart sampling channel simultaneously, do to judge whether thunder and lightning signal rises after piecewise interpolation calculates to smart sample channel data, calculate lifting height Δ h in Δ t, if when Δ h is greater than setting threshold value divided by Δ t, be decided to be beginning rising time simultaneously.Start sopc simultaneously and data are sent into buffer memory.Then judge whether the polarity of Δ h/ Δ t changes, and adopts that time changed data are peak value, records peak value and peak value moment.After peak value has judged, continue to detect Δ h/ Δ t, judge whether negative edge terminates.At the end of negative edge, stop data sending into buffer memory, find rising edge to equal data t1 that the data of half peak value moment t0 and negative edge equal half peak value moment, full width at half maximum can be calculated for (t1-t0).After waveform rise time, fall time, half peak width obtain, in trigger process judge module, these parameters compare with the counterattack parameter set, initial breakdown procedure parameter, Continuous current process parameter, K discharge process parameter, M component processes parameter, NBE procedure parameter, determine the thunder and lightning signal waveform whether triggering respective process.
Fig. 4 shows a kind of thunder and lightning signal trigger triggering method that the embodiment of the present invention provides, and as shown in Figure 4, the method comprises the following steps:
401, wideband antenna module receives the photoelectromagnetic signal that thunder and lightning produces, and described photoelectromagnetic signal is converted into input signal conditioning module after electric signal;
402, described Signal-regulated kinase receives the described electric signal of described wideband antenna module transmission, is input to window comparator module and A/D modular converter to described electric signal after processing;
403, signal trigger module receives the electric signal after described window comparator and described A/D module processing, extracts the ripple feature of described electric signal, and exports trigger pip when meeting trigger condition to square-wave generator according to described ripple feature.
404, the trigger pip of square-wave generator Received signal strength trigger module output, and produce controlled criteria triggers signal output.
Concrete, extract the ripple feature of described photoelectromagnetic signal in above-mentioned steps 403, comprising:
Judge whether described electric signal rises, calculate lifting height Δ h in Δ t simultaneously, if when Δ h/ Δ t is greater than setting threshold value, be decided to be beginning rising time;
According to the value of Δ h/ Δ t, judge whether the change in polarity of Δ h/ Δ t arrives peaking;
Judge whether described electric signal declines, calculate falling head Δ h in Δ t simultaneously, if when Δ h is greater than setting threshold value divided by Δ t, is decided to be and starts the moment that declines;
After peak value being detected, find out rising edge and arrive half peak value moment t0, find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously;
Rise time of described electric signal, fall time and full width at half maximum are the ripple feature of the described electric signal of extraction.
In above-mentioned steps 403, judge whether according to described ripple feature the thunder and lightning signal waveform triggering respective process, comprising:
The parameter that the parameter of described ripple feature and function setting unit set compares by trigger process judge module, comparative result is sent to many arithmetic logic unit, to make described many arithmetic logic unit, described comparative result is analyzed, and according to the logical relation pre-set, trigger the thunder and lightning signal waveform of respective process.
System and method for of the present invention is one to one, and the computation process because of some parameters in the method is also applicable to the process calculated in this system, will no longer be described in detail in systems in which.
Claims (10)
1. a thunder and lightning signal trigger triggering system, is characterized in that, comprising:
Wideband antenna module, for receiving the photoelectromagnetic signal that thunder and lightning produces, and is input to Signal-regulated kinase after described photoelectromagnetic signal is converted into electric signal;
Described Signal-regulated kinase, for receiving the electric signal of described wideband antenna module transmission, is input to window comparator module and A/D modular converter to described electric signal after processing;
Signal trigger module, comprise waveshape feature abstraction unit, trigger process judging unit, many arithmetic logic unit and function setting unit, for receiving the electric signal after described window comparator and described A/D module processing, extract the ripple feature of described electric signal, and export trigger pip when meeting trigger condition to square-wave generator according to described ripple feature;
Square-wave generator, for the trigger pip that Received signal strength trigger module exports, and produces controlled criteria triggers signal output.
2. system according to claim 1, is characterized in that, described system also comprises the reset circuit, electric source filter circuit, download circuit, outer clock circuit and the sopc sheet external expansion circuit that are connected with described signal trigger module.
3. system according to claim 2, is characterized in that, described system also comprises the matrix keyboard circuit module and liquid crystal display circuit module that are connected with described signal trigger module.
4. system according to claim 1, it is characterized in that, described waveshape feature abstraction unit in described signal trigger module is connected with A/D modular converter with described window comparator module, described trigger process judging unit is connected with described waveshape feature abstraction unit, described many arithmetic logic unit are connected with described trigger process judging unit, and described function setting unit is connected with described trigger process judging unit;
Described trigger process judge module, parameter also for the parameter of described ripple feature and function setting unit being set compares, comparative result is sent to many arithmetic logic unit, to make described many arithmetic logic unit analyze according to described comparative result, judge whether to meet trigger condition.
5. system according to claim 4, it is characterized in that, described waveshape feature abstraction unit comprise rise time judgment sub-unit, peak-seeking algorithm subelement, fall time judgment sub-unit and full width at half maximum computation subunit, extract rising time, negative edge time and full width at half maximum respectively;
Described peak-seeking algorithm subelement is connected with described rise time judgment sub-unit, and described fall time, judgment sub-unit was connected with described peak-seeking algorithm subelement, and described full width at half maximum computation subunit is connected with judgment sub-unit described fall time;
Described rise time judgment sub-unit, for judging whether described electric signal rises, calculates lifting height Δ h in Δ t simultaneously;
Described peak-seeking algorithm subelement, for continuing the value according to Δ h/ Δ t, judging whether Δ h/ Δ t polarity changes, thus judging whether peaking;
Described fall time, judgment sub-unit, for judging whether described electric signal declines, calculated falling head Δ h in Δ t simultaneously;
Described full width at half maximum computation subunit, after peak value being detected, find out rising edge and arrive half peak value moment t0, find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously.
6. system according to claim 4, it is characterized in that, described trigger process judging unit comprises fights back triggers unit, initial breakdown electric discharge triggers unit, continuous current triggers unit, K discharge process triggers unit, M component triggers unit and NBE triggers unit.
7. system according to claim 1, it is characterized in that, described square-wave generator is connected with the many arithmetic logic unit in described signal trigger module, when many arithmetic logic unit logic is true time, output signal to square-wave generator, produce the trigger pip of standard.
8. a thunder and lightning signal trigger triggering method, is characterized in that, comprising:
Wideband antenna module receives the photoelectromagnetic signal that thunder and lightning produces, and described photoelectromagnetic signal is converted into input signal conditioning module after electric signal;
Described Signal-regulated kinase receives the described electric signal of described wideband antenna module transmission, is input to window comparator module and A/D modular converter to described electric signal after processing;
Signal trigger module receives the electric signal after described window comparator and described A/D module processing, extracts the ripple feature of described electric signal, and exports trigger pip when meeting trigger condition to square-wave generator according to described ripple feature;
The trigger pip that square-wave generator Received signal strength trigger module exports, and produce controlled criteria triggers signal output.
9. method according to claim 8, is characterized in that, the ripple feature of described extraction electric signal, comprising:
Judge whether described photoelectromagnetic electric signal rises, calculate lifting height Δ h in Δ t simultaneously, if when Δ h/ Δ t is greater than setting threshold value, be decided to be beginning rising time;
According to the value of Δ h/ Δ t, judge whether the change in polarity of Δ h/ Δ t arrives peaking; Judge whether described photoelectromagnetic electric signal declines, calculate falling head Δ h in Δ t simultaneously, if when Δ h is greater than setting threshold value divided by Δ t, is decided to be and starts the moment that declines;
After peak value being detected, find out rising edge and arrive half peak value moment t0, find negative edge to arrive half peak value moment t1, (t1-t0) is full width at half maximum simultaneously;
Rise time of described photoelectromagnetic electric signal, fall time and full width at half maximum are the ripple feature of the described electric signal of extraction.
10. method according to claim 9, is characterized in that, described method also comprises: judge whether trigger condition according to described ripple feature:
The parameter that the parameter of described ripple feature and function setting unit set compares by trigger process judge module, comparative result is sent to many arithmetic logic unit, to make described many arithmetic logic unit analyze described comparative result, judge whether to meet trigger condition.
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