CN204832355U - Digital lightning electric field changes signal measurement system - Google Patents
Digital lightning electric field changes signal measurement system Download PDFInfo
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- CN204832355U CN204832355U CN201520546933.0U CN201520546933U CN204832355U CN 204832355 U CN204832355 U CN 204832355U CN 201520546933 U CN201520546933 U CN 201520546933U CN 204832355 U CN204832355 U CN 204832355U
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Abstract
The utility model discloses a digital lightning electric field changes signal measurement system, system include plate aerial, electric field analog -to -digital conversion module, digital signal processing module at least, electric field analog -to -digital conversion module's input and dull and stereotyped antenna connection, and electric field analog -to -digital conversion module's output and digital signal processing module are connected, the electric field that the plate aerial is used for surveying the lightning production changes the signal and transmits to electric field analog -to -digital conversion module, electric field analog -to -digital conversion module is used for handling and changes electric field change signal, obtains digital lightning electric field and changes the signal and transmit to digital signal processing module, digital signal processing module is used for triggering the collection and the digital lightning electric field change signal of processing changes the signal in order to obtain the lightning electric field soon, the lightning electric field changes signal and lightning electric field original information slowly to save above -mentioned signal, the combination becomes the data frame and the external world communicates. The utility model discloses the realization lightning electric field of low -cost high efficiency soon, the measurement that changes slowly.
Description
Technical field
The utility model relates to weather monitoring technical field, particularly a kind of digitizing lightning electric field change Signal Measurement System.
Background technology
Lightning is one of the most serious disaster of China, has the characteristic such as big current, strong electromagnetic radiation, once be hit, very easily causes the ground object such as buildings, equipment fire, threaten the people's lives and property safety.The generation of lightning has certain rule, and its development is in earlier stage often with a large amount of cumulonimbus.Meteorology adopt weather radar and weather satellite often can predict and monitor the lightning activity situation in a region.But this monitoring belongs to wide area monitoring, can not accurately locate, practical significance is also little.Current high-precision lightning is measured and positioning system generally all adopts the electromagnetic wave capturing lightning production process to be means, accurately measures and locates lightning, and this has great importance to research THE PHYSICS OF LIGHTNING essence and lightning Protection.
At present, the equipment being used for measuring lightning electric field change both at home and abroad comprises two kinds: lightning electric field fast change detection instrument (being usually called fast antenna) and lightning electric field slow change detection instrument (being usually called slow antenna).Both are used for the electric discharge event of the different scale observed in Lightning Process respectively.Under normal circumstances, lightning electric field fast change detection instrument is used for observing the fast discharge process of Lightning Process, such as Preliminary breakdown process, counterattack process, leader process, K process etc., and electric field slow-changing signals detection instrument is mainly used to observe the slow discharge process in Lightning Process, as continuous current (duration is hundreds of millisecond) etc.Its detection principle is as follows: the change of external electrical field can be converted into the electric current of change by antenna, and the electric current of change, by integrating circuit, exports the voltage linear with electric field change after integration conditioning.The difference of lightning electric field fast change detection instrument and the slow change detection instrument of lightning electric field is the difference of integration time constant, and the time constant of the fast change detection instrument of general lightning electric field is millisecond magnitude, and the time constant of the slow change detection instrument of lightning electric field is second-time.
Although above-mentioned detection method and means are widely used, but in actual observation test, particularly when closely lightning is observed, the observation of such as artificially channel braided, find traditional electric field change sniffer, especially the slow change detection device of lightning electric field, the electric field intensity scope that can measure is large not, stronger closely lightning is often occurred to the problem of response saturation.In order to address this problem, scientific research personnel also takes some corresponding measures, Main Means is started with for regulating the value of R (resistance) and C (electric capacity) in integrating circuit, but due to the limitation of current device technology level, some corresponding measures are also difficult to reach closely lightning and fight back the requirement of intensity.Application number be 201220206637.2 patent discloses a kind of device being changed fast sniffer reduction lightning slow-changing signals by lightning.But this device still adopts analog integrator circuit process, need the value of R and C in regulating circuit to mate, such degree of integration is not high yet, and does not fundamentally solve the unified problem of lightning electric field speed electric field antenna.
Summary of the invention
The technical problems to be solved in the utility model is, for prior art above shortcomings part, provides a kind of digitizing lightning electric field change Signal Measurement System, the measurement realizing fast, the slow change of lightning electric field of low cost high effect.
The utility model for solving the problems of the technologies described above adopted technical scheme is:
A kind of digitizing lightning electric field change Signal Measurement System, at least comprise plate aerial, electric field analog-to-digital conversion module, digital signal processing module, the input end of described electric field analog-to-digital conversion module is connected with plate aerial, and the output terminal of electric field analog-to-digital conversion module is connected with digital signal processing module;
Described plate aerial is used for the electric field change signal of detection (induction) lightning generation and transfers to electric field analog-to-digital conversion module;
Described electric field analog-to-digital conversion module for the treatment of with conversion field variable signal, obtain digitized lightning electric field change signal, and by digitized lightning electric field change Signal transmissions to digital signal processing module;
Described digital signal processing module is used for triggering collection and processes described digitized lightning electric field change signal to obtain the fast variable signal of lightning electric field, lightning electric field slow-changing signals and lightning electric field original signal, and above-mentioned signal is stored, be combined into Frame and communicate with the external world.
By such scheme, described electric field analog-to-digital conversion module is analog to digital conversion circuit, comprise the linear amplifier, voltage follower, difference chip and the AD modulus conversion chip that are connected successively, wherein, the input end of linear amplifier is connected with plate aerial, for input signal is carried out Linear Amplifer, voltage follower is used for carrying out voltage follow, difference chip is used for signal differential and sends into AD modulus conversion chip, and AD modulus conversion chip is used for simulating signal being converted into digital signal and sending into digital signal processing module.
By such scheme, described digital signal processing module comprises signal and adopts into module, Fifio cache module, to dispel DC Module, cumulative integration module, Electric Field Characteristics criterion module, floating-point modular converter, fast integration module, slow integration module and clock alignment module, wherein, signal adopts the digital signal that module is sent into for gathering AD modulus conversion chip according to the sampling rate of the AD modulus conversion chip in electric field analog-to-digital conversion module, Fifo cache module is used for the digital signal that buffer memory is sent into, to determine to dispel the precision of direct current, dispel DC Module for dispelling the direct current of signal, floating-point modular converter is used for the double-precision floating points set point signal of input being converted to 64, described cumulative integration module, fast integration module and slow integration module are the digital integrator of different integration constant, be respectively used to obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, wherein, secondly, soon the integration constant of integration module is the most minimum for the integration constant of maximum, the slow integration module of integration constant of cumulative integration module, Electric Field Characteristics criterion module is for contrasting lightning electric field original signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals, judge current adopt into electric field change signal whether meet the electric field change signal characteristic of lightning, if met, then aimed at by time alignment module.
By such scheme, system also comprises memory module, described digital signal processing module also comprises storing driver module, the storing driver model calling of described memory module and digital signal processing module, comprise the fast variable signal of lightning electric field, lightning electric field slow-changing signals, lightning electric field original signal (data being write in memory module by storing driver module) for storing, and buffer memory (buffer memory when transmitting these signals) is done to above-mentioned signal communication.
By such scheme, system also comprises communications interface, described digital signal processing module also comprises communication drivers module, described communications interface is connected with digital signal processing module, for physically the fast variable signal of lightning electric field of crawl, lightning electric field slow-changing signals being carried out communicate (data being spread out of by communication drivers module) with host computer or network with lightning electric field original signal.
By such scheme, system also comprises GPS module, and GPS module is made up of a GPS chip and respective antenna, for receiving satellite clock signal and by clock signal transmission to digital signal processing module, making clock to the lightning electric field change signal of process and demarcate.
By such scheme, described plate aerial is the circular plate aerial of hollow shape, and described electric field analog-to-digital conversion module, digital signal processing module are all on dedicated processes platform, and it is indoor that described dedicated processes platform is positioned at outdoor shielding.
By such scheme, also comprise insulator sleeve pipe and base bracing frame, described insulator sleeve pipe connects described plate aerial, and described base bracing frame is used for supporting insulator sleeve pipe and plate aerial.
The utility model also based on the measuring method of above-mentioned digitizing lightning electric field change Signal Measurement System, comprising:
Step S1, the electric field change signal produced by plate aerial induction lightning, electric field analog-to-digital conversion module is nursed one's health and analog to digital conversion the electric field change signal sensed, obtains digitized lightning electric field change signal;
Step S2, digital signal processing module carries out integration to the digitized lightning electric field change signal that electric field analog-to-digital conversion module imports into, comprise: buffer memory and format conversion are carried out to the data of input, data after conversion are carried out to the digital integration of different integration constant, obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, and to lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals judges, if have lightning Characteristics, then undertaken storing or being communicated with the external world by communications interface by memory module.
Measuring method idiographic flow is as follows: after system starts, the i.e. signal of continuous collecting AD modulus conversion chip feeding, according to clock module, the signal that AD modulus conversion chip is sent into is carried out floating-point conversion by floating-point modular converter, then three Data-Link paths are divided into, enter fast integration module respectively, slow integration module and by entering cumulative integration module after DC Module of dispelling, carry out the integration that integration constant is different, added up by dispel make an uproar direct current of dispelling of dispel DC Module and the lightning electric field change signal of cumulative integration module to antenna induction, obtain lightning electric field original signal, by fast integration module, the lightning electric field change signal of slow integration module to antenna induction carries out integration, restore the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively, and by Electric Field Characteristics criterion module to lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals (integral result) carries out discriminatory analysis, if meet lightning Characteristics, then data are valid data, by clock alignment module, time calibrating is carried out to valid data, by storing driver module, calibrated for elapsed time valid data are exported in memory module or by communication drivers module and will export communications interface to through the calibrated valid data of oversampling clock, data are spread out of.
Principle of work of the present utility model: electric field analog-to-digital conversion module input signal is carried out rough handling and conversion also directly sends into digital signal processing module, digital signal processing module receives the digitized lightning electric field change signal that electric field analog-to-digital conversion module imports into, by the integrator design of different integration constant, integration is carried out by the lightning electric field change signal of integrator to antenna induction of different speed integration constants, restore the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively, by the lightning electric field change signal to antenna induction dispel make an uproar dispel direct current add up, obtain lightning electric field original signal, by read-write external memory storage, above-mentioned signal is stored, and when needs, data framing is communicated with the external world.
The beneficial effects of the utility model are:
1, the lightning electric field change signal of antenna induction is obtained by electric field analog-to-digital conversion module, obtain the fast variable signal of lightning electric field, lightning electric field slow-changing signals and lightning electric field change original signal by the lightning electric field change signal of digital processing chip process antenna induction, achieve integrated measurement that is fast to lightning electric field, slow-changing signals; Can facilitate simultaneously and adjust integration constant dynamically, be applicable to the measurement under various varying environment;
2, be the lightning electric field change signal of antenna induction due to what gather, be the differential signal of the original signal of lightning electric field change, therefore can adopt the dynamic range of original signal more greatly for identical AD, namely digitizing lightning electric field change test macro of the present utility model can measure the lightning variable signal of wider scope;
3, owing to adopting digital signal processing module to realize integrating circuit, digital signal processing module adopts double-precision floating point algorithm, and therefore result precision is high, and more integrated;
4, owing to adopting the lightning electric field change signal of digital signal processing module process antenna induction, therefore signal processing algorithm can be revised at any time, compared with the more convenient environmental protection of mimic channel;
5, by communications Interface realization Long-distance Control, adjustment digital circuit parameters, makes system more flexible;
6, adopt outdoor screened room, the outdoor lightning electric field measurement under various environment can be adapted to, and can range observation antenna nearer, avoid the decay that simulating signal causes because of transmission.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment digitizing lightning electric field change Signal Measurement System;
Fig. 2 is the circuit structure block diagram of electric field analog-to-digital conversion module in Fig. 1;
Fig. 3 is the digital circuit structure block diagram of digital signal processing module in Fig. 1;
Fig. 4 is the process flow diagram of the utility model embodiment digitizing lightning electric field change signal measurement method;
Fig. 5 is the concrete schematic diagram of workflow of the system shown in Fig. 1.
Embodiment
Below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
With reference to shown in Fig. 1 ~ Fig. 3, digitizing lightning electric field change measuring system described in the utility model comprises: for detecting the plate aerial 1 of electric field change signal, electric field analog-to-digital conversion module 4 and digital signal processing module 5 that lightning produces, electric field analog-to-digital conversion module 4 connects plate aerial 1 and digital signal processing module 5 respectively, electric field analog-to-digital conversion module 4, digital signal processing module 5 are all on dedicated processes platform 11, dedicated processes platform 11 also comprises: power module 7, for giving the electronics on dedicated processes platform 11; Clock module 8, provides clock, communications interface 6, for the result of digital signal processing module being transmitted for giving digital signal processing module 5; Memory module 9, for storing gentle data of depositing digital signal processing module; GPS module 10, for receiving satellite clock signal, being supplied to digital signal processing module and carrying out waveform time demarcation.Dedicated processes platform 11 is positioned at outdoor screened room 12.The electric field change Signal transmissions that the lightning sensed produces by plate aerial 1 is to electric field analog-to-digital conversion module 4, electric field analog-to-digital conversion module 4 carries out analog-to-digital conversion process to the electric field change signal that the lightning sensed produces, and by the lightning electric field change Signal transmissions of digitized induction to digital signal processing module 5; The lightning electric field change signal of the digitized induction of digital signal processing module 5 continuous collecting, also by the process of different digital integrator, obtains former lightning electric field change signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively.
Electric field analog-to-digital conversion module 4 is analog to digital conversion circuit, Main Function is that input signal is carried out rough handling and conversion, its schematic diagram as shown in Figure 2, comprise linear amplifier 41, voltage follower 42, difference chip 43 and AD modulus conversion chip 44, wherein, especially by linear amplifier 41, input signal is carried out Linear Amplifer, AD modulus conversion chip 44 is sent into by difference chip 43 difference after carrying out voltage follow by voltage follower 42, by AD modulus conversion chip 44, simulating signal is converted into digital signal, digital signal is the numeral performance of the electric field change signal of induction.Difference chip 43 datum 1V, AD modulus conversion chip 44 works as two's complement pattern, datum 1V, dynamic range 2Vpp.The input signal received is the induced signal of plate aerial 1, and induced signal is converted to digital signal after treatment, directly sends into digital signal processing module 5.
In the present embodiment, digital signal processing module 5 is a digital signal processing chip (as FPGA): digital signal processing module 5 receives the signal of electric field analog-to-digital conversion module 4, then signal is processed, obtain the lightning electric field change signal, the fast variable signal of lightning electric field and the lightning electric field slow-changing signals that reduce, determine whether useful signal by circuit criterion simultaneously, if useful signal, then store or communication.Its schematic diagram as shown in Figure 3, comprises signal and adopts into module 51, Fifio cache module 52, DC Module 53 of dispelling, cumulative integration module 54, Electric Field Characteristics criterion module 55, storing driver module 56, floating-point modular converter 57, fast integration module 58, communication drivers module 59, slow integration module 510, clock alignment module 511.Wherein, signal adopts the digital signal that module 51 is sent into for gathering AD modulus conversion chip 44 according to the sampling rate of the AD modulus conversion chip 44 in electric field analog-to-digital conversion module 4, and samples to data under suitable conditions.The digital signal that Fifo cache module 52 buffer memory is sent into, according to the degree of depth of the Fifo of Fifo cache module 52, the precision of direct current of determining to dispel.Dispel DC Module 53 for dispelling the direct current of signal, mainly the signal of input is deducted a mean value, specific practice is added up by present input data according to the data clock of input data, deduct the readout of the Fifo of assigned address simultaneously, the original state that cumulative sum Fifo due to DC Module 53 of dispelling inputs data is synchronous, the degree of depth of the read-out position of the Fifo therefore specified is the length of direct current cumulative data of dispelling, and this length determines the precision of the direct current mean value of estimation.The double-precision floating points of floating-point modular converter 57 for the set point signal of input being converted to 64, turning floating-point IP by the fixed point called in FPGA can realize.The digital integrator that cumulative integration module 54, fast integration module 58 and slow integration module 510 are all is standard design with the model of analogue integrator, its difference is that cumulative integration module 54, fast integration module 58 are different with the integration constant of the digital integrator of slow integration module 510.Wherein the integration constant of cumulative integration module 54 is maximum, and theoretical value is infinitely great, and the actual totalizer that adopts realizes, and the integration constant of fast integration module 58 is 1ms, and the integration constant of slow integration module 510 is 1s.Known by traditional analog integrator circuit, for active integrator, plate aerial 1 ground capacitance is set to C1, current i so on plate aerial 1 is identical with the backfeed loop electric current of operational amplifier, if the output voltage of amplifier is U, atmospheric electric field intensity is E, plate aerial 1 be d to ground level, the resistance of amplifier backfeed loop is R, and electric capacity is C, then list voltage equation and obtain:
therefore the expression formula of digital integrator is: (u [n]-u [n-1])/T+u [n]/RC=e [n] * K/T, e [n] is E [n]-E [n-1] here, is also the input of digital signal processing module 5.In reality, K value can be adjusted by the signal needed, and T is the sampling rate of AD, also the data processing clock of corresponding digital signals processing module 5, and the expression formula of the u about current output drawn thus [n] is:
The integration constant RC value of cumulative integration module 54, fast integration module 58 and slow integration module 510 is brought into, corresponding coefficient can be obtained.Electric Field Characteristics criterion module 55 is used for contrasting lightning electric field original signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals, be used for judging current adopt into electric field change signal whether meet the electric field change signal characteristic of lightning, if met, then aimed at by time alignment module 511, by storing driver module 56, data are write in memory module 9 afterwards, or data are spread out of by communication drivers module 59.
Further, also comprise insulator sleeve pipe 2, base bracing frame 3, outdoor screened room 12, base bracing frame 3 is for supporting insulator sleeve pipe 2 and plate aerial 1, insulator sleeve pipe 2 is the high-tension insulator (nominal insulation voltage 50kV) of compound substance, its geometrical construction is hollow structure, be used for insulating between antenna integrated and ground, play simultaneously and support antenna integrated effect, its hollow space is used for by antenna integrated coaxial signal transmission line; Insulator sleeve pipe about 2 two ends are connected with electric field analog-to-digital conversion module 4 with plate aerial 1 respectively.Described outdoor screened room 12 adopts metal material to make, and is used for placing dedicated processes platform 11, can the interference of effective shielding space electromagnetic field, plays the effect of shielding and support simultaneously.
Described electric field analog-to-digital conversion module 4, digital signal processing module 5, communications interface 6, power module 7, clock module 8, memory module 9, GPS module 10 are all integrated on dedicated processes platform 11, dedicated processes platform 11 is as the common hardware working environment of each module, and communications interface 6 adopts Ethernet interface; Power module 7 adopts a power supply chip, and the voltage transitions of input being become can for the voltage on dedicated processes platform 10 required for each circuit; Clock module 8 is crystal oscillator clocks, provides original clock for giving digital signal processing module 5; Memory module 9 is several SDRAM and CF cards, and wherein SDRAM is used for doing buffer memory use when communicating, and CF card is for storing data; GPS module 10 is made up of a GPS chip and respective antenna, for receiving gps satellite time signal, is supplied to the demarcation that digital signal processing module 5 does waveform time.
Measure the method for lightning electric field change based on above-mentioned digitizing lightning electric field change measuring system, as shown in Figure 4, comprising:
Step S1, responded to the electric field change signal of lightning generation by plate aerial 1, electric field analog-to-digital conversion module 4 is nursed one's health and analog to digital conversion the electric field change signal sensed, obtains digitized lightning electric field change signal; Plate aerial 1 has large bandwidth, can detect the fast slow-changing signals of lightning electric field;
Step S2, the digitized lightning electric field change signal that digital signal processing module 5 pairs of electric field analog-to-digital conversion modules 4 import into carries out integration, specifically comprise: buffer memory and format conversion are carried out to the data of input, data after conversion are carried out to the digital integration of different integration constant, obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, and to lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals judges, if have lightning Characteristics, then undertaken storing or being communicated with the external world by communications interface 6 by memory module 9.
The concrete control flow of one of above-mentioned lightning electric field change Signal Measurement System as shown in Figure 5, after system starts, the i.e. signal of continuous collecting AD modulus conversion chip 44 feeding, according to clock module 8, the signal sent into by AD modulus conversion chip 44 carries out floating-point conversion by floating-point modular converter 57, then three Data-Link paths are divided into, enter fast integration module 58 respectively, slow integration module 510 and by entering cumulative integration module 54 after DC Module 53 of dispelling, carry out the integration that integration constant is different, by the lightning electric field change signal of dispel DC Module 53 and cumulative integration module 54 pairs of antenna inductions dispel make an uproar dispel direct current add up, obtain lightning electric field original signal, by fast integration module 58, the lightning electric field change signal of slow integration module 510 pairs of antenna inductions carries out integration, restore the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively, and by Electric Field Characteristics criterion module 55 pairs of lightning electric field original signals, the fast variable signal of lightning electric field, lightning electric field slow-changing signals (integral result) carries out discriminatory analysis, if meet lightning Characteristics, then data are valid data, time calibrating is carried out by clock alignment module 511 pairs of valid data, by storing driver module 56, calibrated for elapsed time valid data are exported in memory module 9 or by communication drivers module 59 and will export communications interface 6 to through the calibrated valid data of oversampling clock, data are spread out of.
Above-described embodiment is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of extending out of the present utility model or change and are still among protection domain of the present utility model.
Claims (8)
1. a digitizing lightning electric field change Signal Measurement System, it is characterized in that, at least comprise plate aerial, electric field analog-to-digital conversion module, digital signal processing module, the input end of described electric field analog-to-digital conversion module is connected with plate aerial, and the output terminal of electric field analog-to-digital conversion module is connected with digital signal processing module;
Described plate aerial is for detecting the electric field change signal of lightning generation and transferring to electric field analog-to-digital conversion module;
Described electric field analog-to-digital conversion module for the treatment of with conversion field variable signal, obtain digitized lightning electric field change signal, and by digitized lightning electric field change Signal transmissions to digital signal processing module;
Described digital signal processing module is used for triggering collection and processes described digitized lightning electric field change signal to obtain the fast variable signal of lightning electric field, lightning electric field slow-changing signals and lightning electric field original signal, and above-mentioned signal is stored, be combined into Frame and communicate with the external world.
2. digitizing lightning electric field change Signal Measurement System as claimed in claim 1, it is characterized in that, described electric field analog-to-digital conversion module is analog to digital conversion circuit, comprise the linear amplifier be connected successively, voltage follower, difference chip and AD modulus conversion chip, wherein, the input end of linear amplifier is connected with plate aerial, for input signal is carried out Linear Amplifer, voltage follower is used for carrying out voltage follow, difference chip is used for signal differential and sends into AD modulus conversion chip, AD modulus conversion chip is used for simulating signal being converted into digital signal and sending into digital signal processing module.
3. digitizing lightning electric field change Signal Measurement System as claimed in claim 2, it is characterized in that, described digital signal processing module comprises signal and adopts into module, Fifio cache module, to dispel DC Module, cumulative integration module, Electric Field Characteristics criterion module, floating-point modular converter, fast integration module, slow integration module and clock alignment module, wherein, signal adopts the digital signal that module is sent into for gathering AD modulus conversion chip according to the sampling rate of the AD modulus conversion chip in electric field analog-to-digital conversion module, Fifo cache module is used for the digital signal that buffer memory is sent into, to determine to dispel the precision of direct current, dispel DC Module for dispelling the direct current of signal, floating-point modular converter is used for the double-precision floating points set point signal of input being converted to 64, described cumulative integration module, fast integration module and slow integration module are the digital integrator of different integration constant, be respectively used to obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, wherein, secondly, soon the integration constant of integration module is the most minimum for the integration constant of maximum, the slow integration module of integration constant of cumulative integration module, Electric Field Characteristics criterion module is for contrasting lightning electric field original signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals, judge current adopt into electric field change signal whether meet the electric field change signal characteristic of lightning, if met, then aimed at by time alignment module.
4. digitizing lightning electric field change Signal Measurement System as claimed in claim 3, it is characterized in that, system also comprises memory module, described digital signal processing module also comprises storing driver module, the storing driver model calling of described memory module and digital signal processing module, comprise the fast variable signal of lightning electric field, lightning electric field slow-changing signals, lightning electric field original signal for storing, and buffer memory is done to above-mentioned signal communication.
5. digitizing lightning electric field change Signal Measurement System as claimed in claim 3, it is characterized in that, system also comprises communications interface, described digital signal processing module also comprises communication drivers module, described communications interface is connected with digital signal processing module, for physically the fast variable signal of lightning electric field of crawl, lightning electric field slow-changing signals being communicated with host computer or network with lightning electric field original signal.
6. digitizing lightning electric field change Signal Measurement System as claimed in claim 1, it is characterized in that, system also comprises GPS module, GPS module is made up of a GPS chip and respective antenna, for receiving satellite clock signal and by clock signal transmission to digital signal processing module, making clock to the lightning electric field change signal of process and demarcate.
7. digitizing lightning electric field change Signal Measurement System as claimed in claim 1, it is characterized in that, described plate aerial is the circular plate aerial of hollow shape, described electric field analog-to-digital conversion module, digital signal processing module are all on dedicated processes platform, and it is indoor that described dedicated processes platform is positioned at outdoor shielding.
8. digitizing lightning electric field change Signal Measurement System as claimed in claim 1, it is characterized in that, also comprise insulator sleeve pipe and base bracing frame, described insulator sleeve pipe connects described plate aerial, and described base bracing frame is used for supporting insulator sleeve pipe and plate aerial.
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| CN201520546933.0U CN204832355U (en) | 2015-07-24 | 2015-07-24 | Digital lightning electric field changes signal measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977478A (en) * | 2015-07-24 | 2015-10-14 | 国网电力科学研究院武汉南瑞有限责任公司 | Measurement system for digital lightning electric field changing signal and measurement method thereof |
| CN106872795A (en) * | 2017-01-20 | 2017-06-20 | 中国电力科学研究院 | A kind of system and method for being measured to transient state space electric field |
-
2015
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977478A (en) * | 2015-07-24 | 2015-10-14 | 国网电力科学研究院武汉南瑞有限责任公司 | Measurement system for digital lightning electric field changing signal and measurement method thereof |
| WO2017016140A1 (en) * | 2015-07-24 | 2017-02-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Digital measurement system for measuring lightning electric field change signal, and measurement method thereof |
| CN104977478B (en) * | 2015-07-24 | 2018-04-27 | 国网电力科学研究院武汉南瑞有限责任公司 | One kind digitlization lightning electric field change Signal Measurement System and its measuring method |
| CN106872795A (en) * | 2017-01-20 | 2017-06-20 | 中国电力科学研究院 | A kind of system and method for being measured to transient state space electric field |
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