CN104977478B - One kind digitlization lightning electric field change Signal Measurement System and its measuring method - Google Patents
One kind digitlization lightning electric field change Signal Measurement System and its measuring method Download PDFInfo
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Abstract
The invention discloses one kind digitlization lightning electric field change Signal Measurement System and its measuring method, system includes at least plate aerial, electric field analog-to-digital conversion module, digital signal processing module, the input terminal of 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；Plate aerial is used to detect the electric field change signal of lightning generation and is transmitted to electric field analog-to-digital conversion module；Electric field analog-to-digital conversion module is used to handle and conversion field variable signal, obtains digitized lightning electric field change signal and is transmitted to digital signal processing module；Digital signal processing module is used for triggering collection and handles 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 stored above-mentioned signal, it is combined into data frame and the external world communicates.The measurement realized that lightning electric field is fast, changed slowly of low cost high effect of the invention.
Description
Technical field
The present invention relates to weather monitoring technical field, more particularly to a kind of digitlization lightning electric field change Signal Measurement System
And its measuring method.
Background technology
Lightning is one of natural calamity of China's most serious, has the characteristics such as high current, strong electromagnetic radiation, once hit
In, easily trigger the ground object fire such as building, equipment, threaten the people's lives and property safety.Lightning has one
Fixed rule, it develops early period often with substantial amounts of cumulonimbus.Use weather radar and meteorological satellite often can be with meteorology
The lightning activity situation in one region of prediction and monitoring.But this monitoring belongs to wide area monitoring, it is impossible to is accurately positioned, actual meaning
Justice is simultaneously little.High-precision lightning measurement and alignment system generally all use crawl lightning to produce the electromagnetic wave of process as hand at present
Section, accurately measures and positions lightning, this has great importance research THE PHYSICS OF LIGHTNING essence and lightning Protection.
At present, being used for measuring the equipment of lightning electric field change both at home and abroad includes two kinds：The fast change detection instrument of lightning electric field is (often
Frequently referred to fast antenna) and the slow change detection instrument of lightning electric field (being usually referred to as slow antenna).Both are respectively intended to observation Lightning Process
In different scale electric discharge event.Under normal conditions, the fast change detection instrument of lightning electric field is used for observing putting soon for Lightning Process
Electric process, such as Preliminary breakdown process, counterattack process, leader process, K processes etc., and electric field slow-changing signals survey meter is mainly used
To observe the slow play electric process in Lightning Process, such as continuous current (duration is hundreds of milliseconds).Its detection principle
It 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 is integrated by integrating circuit
Output and the linear voltage of electric field change after conditioning.The fast change detection instrument of lightning electric field and lightning electric field change spy slowly
Instrument is surveyed difference lies in the difference of integration time constant, the time constant of the general fast change detection instrument of lightning electric field is millisecond amount
Level, the time constant of the slow change detection instrument of lightning electric field is second-time.
Although above-mentioned detection method and means have been widely used, in actual observation experiment, particularly near
When being observed apart from lightning, such as the observation of artificially channel braided, find traditional electric field change detection device, especially lightning electricity
The slow change detection device in field, the electric field strength scope that can be measured is not big enough, is often rung for stronger closely lightning
The problem of answering saturation.In order to solve this problem, scientific research personnel also takes some corresponding measures, and main means accumulate to adjust
The value of R (resistance) and C (capacitance) are started with parallel circuit, but due to the limitation of current device technology level, some are corresponding
Measure also is difficult to reach the requirement that closely lightning fights back intensity.The patent of Application No. 201220206637.2 discloses one kind
Change the device of fast detection device reduction lightning slow-changing signals by lightning.But the device still uses analog integrator circuit
Processing, it is also desirable to which the value for adjusting R and C in circuit is matched, and such degree of integration is not high, and does not solve fundamentally to dodge
The problem of electric field speed electric field antenna is unified.
The content of the invention
The technical problem to be solved in the present invention is in place of deficiencies of the prior art, there is provided a kind of numeral
Change lightning electric field change Signal Measurement System and its measuring method, inexpensive high effect realizes that lightning electric field is fast, changes slowly
Measurement.
The present invention is that technical solution is used by solving above-mentioned technical problem：
One kind digitlization lightning electric field change Signal Measurement System, including at least plate aerial, electric field analog-to-digital conversion module,
Digital signal processing module, the input terminal of the electric field analog-to-digital conversion module are connected with plate aerial, electric field analog-to-digital conversion module
Output terminal be connected with digital signal processing module；
The plate aerial is used to detect the electric field change signal of (sensing) lightning generation and is transmitted to electric field analog-to-digital conversion
Module；
The electric field analog-to-digital conversion module is used to handle and conversion field variable signal, obtains digitized lightning electric field and becomes
Change signal, and by digitized lightning electric field change signal transmission to digital signal processing module；
The digital signal processing module be used for triggering collection and handle the digitized lightning electric field change signal with
The fast variable signal of lightning electric field, lightning electric field slow-changing signals and lightning electric field original signal are obtained, and above-mentioned signal is carried out
Storage, is combined into data frame and the external world communicates.
By such scheme, the electric field analog-to-digital conversion module is analog to digital conversion circuit, including the Linear Amplifer being sequentially connected
Device, voltage follower, difference chip and AD modulus conversion chips, wherein, input terminal and the plate aerial of linear amplifier connect
Connect, for input signal to be carried out Linear Amplifer, voltage follower is used to carry out voltage follow, and difference chip is used for signal difference
Divide and be sent into AD modulus conversion chips, AD modulus conversion chips are used to convert analog signals into as digital signal and be sent into numeral
Signal processing module.
By such scheme, the digital signal processing module is adopted into module, Fifio cache modules, direct current of dispelling including signal
Module, cumulative integration module, Electric Field Characteristics criterion module, floating-point modular converter, fast integration module, slow integration module and clock
Alignment modules, wherein, signal adopts module for the sampling speed according to the AD modulus conversion chips in electric field analog-to-digital conversion module
The digital signal that rate collection AD modulus conversion chips are sent into, Fifo cache modules are used to cache the digital signal being sent into, determine to dispel
The precision of direct current, DC Module of dispelling are used for the direct current for dispelling signal, and floating-point modular converter is used to turn the set point signal of input
It is changed to the double-precision floating points of 64；The cumulative integration module, fast integration module and slow integration module are different integral constants
Digital integrator, be respectively used to obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field and change letter slowly
Number, wherein, add up integration module maximum, the slow integration module of integral constant integral constant secondly, the integration of fast integration module
Constant is minimum；Electric Field Characteristics criterion module is used to contrast lightning electric field original signal, the fast variable signal of lightning electric field and lightning
Electric field slow-changing signals, judge it is current adopt into electric field change signal whether meet the electric field change signal characteristic of lightning, if
Meet, then passage time alignment modules are aligned.
By such scheme, system further includes memory module, and the digital signal processing module further includes storage driving module,
The memory module and the storage driving module of digital signal processing module connect, and include lightning electric field for storage changes letter soon
Number, lightning electric field slow-changing signals, lightning electric field original signal (being write data into by storage driving module in memory module),
And (caching when transmitting these signals) is cached to above-mentioned signal communication.
By such scheme, system further includes communications interface, and the digital signal processing module further includes communication driving
Module, the communications interface are connected with digital signal processing module, for physically changing the lightning electric field of crawl soon
Signal, lightning electric field slow-changing signals and lightning electric field original signal and host computer or network are communicated and (are passed through data
The drive module that communicates outflow).
By such scheme, system further includes GPS module, and GPS module is made of a GPS chip and respective antenna, is used for
Receive satellite clock signal and by clock signal transmission to digital signal processing module, the lightning electric field change signal to processing is done
Clock is demarcated.
By such scheme, the plate aerial be hollow shape circular plate aerial, the electric field analog-to-digital conversion module,
Digital signal processing module is on dedicated processes platform, and it is indoor that the dedicated processes platform is located at outdoor shielding.
By such scheme, insulator casing and base supporting rack are further included, the insulator casing connects the tablet day
Line, the base supporting rack are used to support insulator casing and plate aerial.
Present invention also offers a kind of measuring method based on above-mentioned digitlization lightning electric field change Signal Measurement System, bag
Include：
Step S1, the electric field change signal of lightning generation is sensed by plate aerial, electric field analog-to-digital conversion module is to sensing
To electric field change signal nursed one's health and analog-to-digital conversion, obtain digitized lightning electric field change signal；
Step S2, the digitized lightning electric field change letter that digital signal processing module is passed to electric field analog-to-digital conversion module
Number integrated, including：The data of input are cached and format conversion, different integral constants are carried out to transformed data
Digital integration, obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, and to dodging
Electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals are judged, if special with lightning
Sign, then stored or by communications interface communication with the outside world by memory module.
By such scheme, measuring method idiographic flow is as follows：After system starts, i.e. continuous collecting AD analog-to-digital conversions core
The signal that piece is sent into, according to clock module, floating-point is carried out by the signal that AD modulus conversion chips are sent into by floating-point modular converter
Conversion, is then divided into three data chain paths, respectively enters fast integration module, slow integration module and laggard by DC Module of dispelling
Enter cumulative integration module, carry out the different integration of integral constant, by dispel DC Module and cumulative integration module to antenna induction
Dispel make an uproar direct current of dispelling of lightning electric field change signal add up, obtain lightning electric field original signal, pass through fast integration module, slow product
Sub-module integrates the lightning electric field change signal of antenna induction, restores the fast variable signal of lightning electric field and lightning respectively
Electric field slow-changing signals, and by Electric Field Characteristics criterion module to lightning electric field original signal, the fast variable signal of lightning electric field, sudden strain of a muscle
Electric field slow-changing signals (integral result) carry out discriminatory analysis, if meeting lightning Characteristics, data are valid data, are passed through
Clock alignment module carries out time calibrating to valid data, by storage driving module by elapsed time calibrated valid data
Export into memory module or will be exported by the drive module that communicates through the calibrated valid data of oversampling clock to communications and connect
Mouthful, data are spread out of.
The operation principle of the present invention：Input signal is carried out preliminary treatment and conversion and directly sent by electric field analog-to-digital conversion module
Enter digital signal processing module；Digital signal processing module receives the digitized lightning electric field that electric field analog-to-digital conversion module is passed to
Variable signal, by the integrator design of different integral constants, by the integrator of different speed integral constants to antenna sense
The lightning electric field change signal answered is integrated, and restores the fast variable signal of lightning electric field respectively and lightning electric field changes letter slowly
Number, added up by the make an uproar direct current of dispelling of dispelling of the lightning electric field change signal to antenna induction, obtain lightning electric field original signal, pass through
External memory storage is read and write, above-mentioned signal is stored, and by data framing and extraneous communication when needing.
The beneficial effects of the present invention are：
1st, the lightning electric field change signal of antenna induction is obtained by electric field analog-to-digital conversion module, passes through digital processing chip
The lightning electric field change signal of processing antenna induction obtains the fast variable signal of lightning electric field, lightning electric field slow-changing signals and lightning
Electric field change original signal, realizes fast to lightning electric field, slow-changing signals integrated measurements；Conveniently can dynamically it adjust at the same time
Whole integral constant, suitable for the measurement under various varying environments；
2nd, due to collection be antenna induction lightning electric field change signal, be lightning electric field change original signal it is micro-
Sub-signal, therefore the dynamic range bigger of original signal can be adopted for identical AD, i.e. digitlization lightning electric field of the invention
Change the lightning variable signal of the measurable wider scope of test system；
3rd, due to realizing integrating circuit using digital signal processing module, digital signal processing module uses double-precision floating point
Algorithm, therefore handling result precision is high, and it is more integrated；
4th, due to the lightning electric field change signal using digital signal processing module processing antenna induction, can repair at any time
Change signal processing algorithm, environmental protection is more convenient compared with analog circuit；
5th, remote control is realized by communications interface, adjusts digital circuit parameters so that system is more flexible；
6th, using outdoor screened room, the outdoor lightning electric field measurement being suitable under various environment, and can range measurement antenna
Closer to avoiding analog signal and decay caused by transmission.
Brief description of the drawings
Fig. 1 is the structure diagram of digitlization lightning electric field change Signal Measurement System of the embodiment of the present invention；
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 flow chart of digitlization lightning electric field change signal measurement method of the embodiment of the present invention；
Fig. 5 is the specific schematic diagram of workflow of the system shown in Fig. 1.
Embodiment
Below according to specific embodiment and with reference to attached drawing, the present invention is described in further detail.
With reference to shown in Fig. 1~Fig. 3, digitlization lightning electric field change measuring system of the present invention includes：For detecting
Plate aerial 1, electric field analog-to-digital conversion module 4 and the digital signal processing module 5 for the electric field change signal that lightning produces, electric field mould
Number modular converters 4 connect plate aerial 1 and digital signal processing module 5 respectively, at electric field analog-to-digital conversion module 4, digital signal
Reason module 5 is on dedicated processes platform 11, is further included on dedicated processes platform 11：Power module 7, for dedicated processes
Electronics on platform 11；Clock module 8, for providing clock, communications interface to digital signal processing module 5
6, for the handling result of digital signal processing module to be transmitted；Memory module 9, for storing and caching at digital signal
Manage the data of module；GPS module 10, for receiving satellite clock signal, there is provided when carrying out waveform to digital signal processing module
Between demarcate.Dedicated processes platform 11 is located in outdoor screened room 12.The electric field change that plate aerial 1 produces the lightning sensed
The electric field change signal that signal transmission produces the lightning sensed to electric field analog-to-digital conversion module 4, electric field analog-to-digital conversion module 4
Analog-to-digital conversion process is carried out, and by the lightning electric field change signal transmission of digitized sensing to digital signal processing module 5；Number
The lightning electric field change signal of the digitized sensing of 5 continuous collecting of word signal processing module and by different digital integrator at
Reason, respectively obtains former lightning electric field change signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals.
Electric field analog-to-digital conversion module 4 is analog to digital conversion circuit, and main function is that input signal is carried out preliminary treatment and is turned
Change, its schematic diagram is as shown in Fig. 2, including linear amplifier 41, voltage follower 42, difference chip 43 and AD analog-to-digital conversion cores
Piece 44, wherein, input signal is subjected to Linear Amplifer especially by linear amplifier 41, voltage is carried out by voltage follower 42
AD modulus conversion chips 44 are sent into by 43 difference of difference chip after following, by AD modulus conversion chips 44 by analog signal
Digital signal is converted into, digital signal is the numeral performance of the electric field change signal sensed.43 datum of difference chip
The work of 1V, AD modulus conversion chip 44 is complement of two's two's complement pattern, datum 1V, dynamic range 2Vpp.The input received
Signal is the inductive signal of plate aerial 1, and inductive signal is converted to digital signal, is sent directly at digital signal after treatment
Manage module 5.
Digital signal processing module 5 is a digital signal processing chip (such as FPGA) in the present embodiment：Digital signal
Processing module 5 receives the signal of electric field analog-to-digital conversion module 4, and then signal is handled, the lightning electric field reduced
Variable signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals, while determine whether have by circuit criterion
Signal is imitated, if useful signal, then stores or communicates.Its schematic diagram including signal as shown in figure 3, adopt into module 51, Fifio
Cache module 52, DC Module 53 of dispelling, cumulative integration module 54, Electric Field Characteristics criterion module 55, storage driving module 56, floating-point
Modular converter 57, fast integration module 58, communication drive module 59, slow integration module 510, clock alignment module 511.Wherein, believe
Module 51 number is adopted to be used to gather AD moduluses according to the sampling rate of the AD modulus conversion chips 44 in electric field analog-to-digital conversion module 4
The digital signal that conversion chip 44 is sent into, and data are sampled under suitable conditions.The caching of Fifo cache modules 52 is sent
The digital signal entered, according to the depth of the Fifo of Fifo cache modules 52, the precision for the direct current that determines to dispel.DC Module 53 of dispelling is used
In the direct current for dispelling signal, the signal of input is mainly subtracted into an average value, specific practice is the number according to input data
Present input data is added up according to clock, while subtracts the readout of the Fifo of designated position, due to DC Module 53 of dispelling
Cumulative and Fifo input datas original state be synchronous, therefore the depth of the read-out position of the Fifo specified be dispel it is straight
The length of cumulative data is flowed, this length determines the precision of the direct current average value of estimation.Floating-point modular converter 57 is used for will
The set point signal of input is converted to the double-precision floating points of 64, can be achieved by calling the fixed point in FPGA to turn floating-point IP.
Cumulative integration module 54, fast integration module 58 and slow integration module 510 are all to be designed using the model of analogue integrator as standard
Digital integrator, its digital integrator difference lies in cumulative integration module 54, fast integration module 58 and slow integration module 510
Integral constant is different.The integral constant of wherein cumulative integration module 54 is maximum, and theoretical value is infinitely great, actual real using accumulator
Existing, the integral constant of fast integration module 58 is 1ms, and the integral constant of slow integration module 510 is 1s.By traditional analog integration electricity
Road is known, by taking active integrator as an example, 1 direct-to-ground capacitance of plate aerial is set to C1, then electric current i and computing on plate aerial 1
The backfeed loop electric current of amplifier is identical, if the output voltage of amplifier is U, atmospheric electric field intensity is E, and plate aerial 1 is over the ground
Highly it is d, the resistance of amplifier backfeed loop is R, capacitance C, then lists 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 here
[n]-E [n-1], and the input of digital signal processing module 5.In practice, K values are can be adjusted by the signal of needs
, T is the sample rate of AD, also the data processing clock of corresponding digital signals processing module 5, it follows that on current defeated
The expression formula of the u [n] gone out is：
The integral constant RC values of cumulative integration module 54, fast integration module 58 and slow integration module 510 are brought into, you can
To corresponding coefficient.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, for judge currently to adopt into electric field change signal whether meet that the electric field change signal of lightning is special
Sign, if it is satisfied, then passage time alignment modules 511 are aligned, are write data into by storage driving module 56 deposit afterwards
Store up in module 9, or data are spread out of by the drive module 59 that communicates.
Further, insulator casing 2, base supporting rack 3, outdoor screened room 12 are further included, base supporting rack 3 is used for branch
Insulator casing 2 and plate aerial 1 are supportted, insulator casing 2 is the high-tension insulator (nominal insulation voltage 50kV) of composite material,
Its geometrical construction is hollow structure, for insulating antenna integrated between ground, while plays and supports antenna integrated effect, its
Hollow space is used for passing through antenna integrated coaxial signal transmission line；2 upper and lower ends of insulator casing respectively with 1 He of plate aerial
Electric field analog-to-digital conversion module 4 is connected.The open air screened room 12 is made of metal material, for placing dedicated processes platform
11, it is capable of the interference of effective shielding space electromagnetic field, while play the role of shielding and support.
The 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 integrated on dedicated processes platform 11, and dedicated processes platform 11 is as each module
Common hardware working environment, communications interface 6 use Ethernet interface；Power module 7 uses a power supply chip, will input
Voltage conversion become for each required voltage of circuit on dedicated processes platform 10；When clock module 8 is a crystal oscillator
Clock, for providing original clock to digital signal processing module 5；Memory module 9 is several SDRAM and CF cards, and wherein SDRAM is used
Caching is done when in communication to use, CF cards are used to store data；GPS module 10 is made of a GPS chip and respective antenna, is used
In reception gps satellite time signal, there is provided do the calibration of waveform time to digital signal processing module 5.
The method of lightning electric field change is measured based on above-mentioned digitlization lightning electric field change measuring system, as shown in figure 4,
Including：
Step S1, the electric field change signal of lightning generation is sensed by plate aerial 1, electric field analog-to-digital conversion module 4 is to sense
The electric field change signal that should be arrived is nursed one's health and analog-to-digital conversion, obtains digitized lightning electric field change signal；Plate aerial 1 has
There is big bandwidth, the fast slow-changing signals of lightning electric field can be detected；
Step S2, the digitized lightning electric field change that digital signal processing module 5 is passed to electric field analog-to-digital conversion module 4
Signal is integrated, and is specifically included：The data of input are cached and format conversion, transformed data are not equally had
Divide the digital integration of constant, obtain lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals,
And lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals are judged, if with sudden strain of a muscle
Electrical feature, then stored or by 6 communication with the outside world of communications interface by memory module 9.
A kind of specific control flow of above-mentioned lightning electric field change Signal Measurement System is as shown in figure 5, system starts
Afterwards, i.e., the signal that continuous collecting AD modulus conversion chips 44 are sent into, according to clock module 8, AD modulus conversion chips 44 are sent into
Signal floating-point conversion is carried out by floating-point modular converter 57, be then divided into three data chain paths, respectively enter fast integration mould
Block 58, slow integration module 510 and by entering cumulative integration module 54 after DC Module 53 of dispelling, carry out the different product of integral constant
Point, by dispelling DC Module 53 and cumulative integration module 54 carries out direct current of dispelling of making an uproar of dispelling to the lightning electric field change signal of antenna induction
It is cumulative, lightning electric field original signal is obtained, by fast integration module 58, slow integration module 510 to the lightning electric field of antenna induction
Variable signal is integrated, and restores the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively, and pass through electric field
Performance criteria module 55 to lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, (tie by integration
Fruit) discriminatory analysis is carried out, if meeting lightning Characteristics, data are valid data, by clock alignment module 511 to significant figure
According to time calibrating is carried out, elapsed time calibrated valid data are exported into memory module 9 by storage driving module 56
Or will be exported by the drive module 59 that communicates through the calibrated valid data of oversampling clock to communications interface 6, data are spread out of.
Above-described embodiment is only intended to clearly illustrate example of the present invention, and is not the embodiment party to the present invention
The restriction of formula.For those of ordinary skill in the field, other differences can also be made on the basis of the above description
The change or variation of form.There is no necessity and possibility to exhaust all the enbodiments.And these belong to the essence of the present invention
Among the obvious changes or variations that god extends out is still in protection scope of the present invention.
Claims (8)
1. one kind digitlization lightning electric field change Signal Measurement System, it is characterised in that including at least plate aerial, electric field modulus
Modular converter, digital signal processing module, the input terminal of the electric field analog-to-digital conversion module are connected with plate aerial, electric field modulus
The output terminal of modular converter is connected with digital signal processing module；
The plate aerial is used to detect the electric field change signal of lightning generation and is transmitted to electric field analog-to-digital conversion module；
The electric field analog-to-digital conversion module is used to handle and conversion field variable signal, obtains digitized lightning electric field change letter
Number, and by digitized lightning electric field change signal transmission to digital signal processing module；
The digital signal processing module is used for triggering collection and handles the 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,
It is combined into data frame and the external world communicates；
The electric field analog-to-digital conversion module is analog to digital conversion circuit, including be sequentially connected linear amplifier, voltage follower, difference
Point chip and AD modulus conversion chips, wherein, the input terminal of linear amplifier is connected with plate aerial, for by input signal
Linear Amplifer is carried out, voltage follower is used to carry out voltage follow, and difference chip is used for signal differential and is sent into AD moduluses turn
Chip is changed, AD modulus conversion chips are used to convert analog signals into as digital signal and be sent into digital signal processing module；
The digital signal processing module is adopted into module, Fifio cache modules, DC Module of dispelling, cumulative integration mould including signal
Block, Electric Field Characteristics criterion module, floating-point modular converter, fast integration module, slow integration module and clock alignment module, wherein,
Signal adopts module and is used to turn according to the sampling rate collection AD moduluses of the AD modulus conversion chips in electric field analog-to-digital conversion module
The digital signal of chip feeding is changed, Fifo cache modules are used to cache the digital signal being sent into, the precision for the direct current that determines to dispel, dispel
DC Module is used for the direct current for dispelling signal, and floating-point modular converter is used to be converted to the set point signal of input the double precision of 64
Floating number；The cumulative integration module, fast integration module and slow integration module are the digital integrator of different integral constants, respectively
For obtaining lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, wherein, add up integration
The integral constant of maximum, the slow integration module of integral constant of module secondly, the integral constant of fast integration module it is minimum；Electric field is special
Property criterion module be used to contrast lightning electric field original signal, the fast variable signal of lightning electric field and lightning electric field slow-changing signals, sentence
Adopted before settled into electric field change signal whether meet the electric field change signal characteristic of lightning, if it is satisfied, then passage time pair
Quasi-mode block is aligned.
2. digitlization lightning electric field change Signal Measurement System as claimed in claim 1, it is characterised in that system, which further includes, deposits
Module is stored up, the digital signal processing module further includes storage driving module, the memory module and digital signal processing module
Storage driving module connection, for store include the fast variable signal of lightning electric field, lightning electric field slow-changing signals, lightning electric field
Original signal, and above-mentioned signal communication is cached.
3. digitlization lightning electric field change Signal Measurement System as claimed in claim 1, it is characterised in that system further includes logical
Believe coffret, the digital signal processing module further includes communication drive module, the communications interface and digital signal
Processing module connects, for physically by the fast variable signal of lightning electric field, lightning electric field slow-changing signals and the lightning electricity of crawl
Field original signal and host computer or network communicate.
4. digitlization lightning electric field change Signal Measurement System as claimed in claim 1, it is characterised in that system further includes
GPS module, GPS module are made of a GPS chip and respective antenna, for receiving satellite clock signal and passing clock signal
Digital signal processing module is defeated by, the lightning electric field change signal to processing does clock calibration.
5. digitlization lightning electric field change Signal Measurement System as claimed in claim 1, it is characterised in that the plate aerial
For the circular plate aerial of hollow shape, the electric field analog-to-digital conversion module, digital signal processing module are in dedicated processes
On platform, it is indoor that the dedicated processes platform is located at outdoor shielding.
6. digitlization lightning electric field change Signal Measurement System as claimed in claim 1, it is characterised in that further include insulator
Casing and base supporting rack, the insulator casing connect the plate aerial, and the base supporting rack is used to support insulator
Casing and plate aerial.
A kind of 7. measurement side for digitizing lightning electric field change Signal Measurement System as described in claim 1 ~ 6 is one of any
Method, it is characterised in that including：
Step S1, senses the electric field change signal that lightning produces, electric field analog-to-digital conversion module is to sensing by plate aerial
Electric field change signal is nursed one's health and analog-to-digital conversion, obtains digitized lightning electric field change signal；
Step S2, the digitized lightning electric field change signal that digital signal processing module is passed to electric field analog-to-digital conversion module into
Row integration, including：The data of input are cached and format conversion, transformed data are carried out with the number of different integral constants
Word integrates, and obtains lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals, and to lightning electricity
Field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals are judged, if having lightning Characteristics,
Stored by memory module or by communications interface communication with the outside world.
8. the measuring method of digitlization lightning electric field change Signal Measurement System as claimed in claim 7, it is characterised in that survey
Amount method idiographic flow is as follows：After system starts, i.e., continuous collecting AD modulus conversion chips be sent into signal, according to clock
Module, carries out floating-point conversion by floating-point modular converter by the signal that AD modulus conversion chips are sent into, is then divided into three datas
Chain path, respectively enters fast integration module, slow integration module and by entering cumulative integration module after DC Module of dispelling, is accumulated
Divide constant different integrations, pass through the lightning electric field change signal progress of DC Module and cumulative integration module to antenna induction of dispelling
The make an uproar direct current of dispelling of dispelling adds up, and obtains lightning electric field original signal, by fast integration module, slow integration module to the lightning of antenna induction
Electric field change signal is integrated, and restores the fast variable signal of lightning electric field and lightning electric field slow-changing signals respectively, and pass through
Electric Field Characteristics criterion module carries out lightning electric field original signal, the fast variable signal of lightning electric field, lightning electric field slow-changing signals
Discriminatory analysis, if meeting lightning Characteristics, data are valid data, and the time is carried out to valid data by clock alignment module
Calibration, elapsed time calibrated valid data are exported into memory module or driven by communicating by storage driving module
Module will be exported to communications interface through the calibrated valid data of oversampling clock, and data are spread out of.
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| CN201510441972.9A CN104977478B (en) | 2015-07-24 | 2015-07-24 | One kind digitlization lightning electric field change Signal Measurement System and its measuring method |
| PCT/CN2015/097426 WO2017016140A1 (en) | 2015-07-24 | 2015-12-15 | Digital measurement system for measuring lightning electric field change signal, and measurement method thereof |
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| 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 |
| CN105137205A (en) * | 2015-10-20 | 2015-12-09 | 西华大学 | Electromagnetic pulse electric field measurement system |
| CN106707038A (en) * | 2017-02-17 | 2017-05-24 | 北京中自控创新科技发展有限公司 | Local and remote detection combined integrated lightening early waning composite probe and detection method thereof |
| CN107525974A (en) * | 2017-09-06 | 2017-12-29 | 武汉旗云高科工程技术有限公司 | A kind of Lightning Warning method and speed antenna integral type electric field change measuring instrument |
| CN107918062B (en) * | 2017-12-20 | 2021-02-05 | 中国电力科学研究院有限公司 | Wide-frequency-domain transient space electric field measurement system and method |
| CN109795725B (en) * | 2019-01-31 | 2020-11-24 | 上海微小卫星工程中心 | Simulator for simulating space conductive slip ring and corresponding simulation method |
| CN113866515A (en) * | 2021-08-27 | 2021-12-31 | 国网电力科学研究院武汉南瑞有限责任公司 | Thunder and lightning fusion detector |
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