CN108872824A - Soil electric discharge imaging device and more impulse current generator synchronization systems and method - Google Patents
Soil electric discharge imaging device and more impulse current generator synchronization systems and method Download PDFInfo
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- CN108872824A CN108872824A CN201811026145.3A CN201811026145A CN108872824A CN 108872824 A CN108872824 A CN 108872824A CN 201811026145 A CN201811026145 A CN 201811026145A CN 108872824 A CN108872824 A CN 108872824A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention discloses a kind of soil electric discharge imaging device systems synchronous with more impulse current generators, including：It is delayed high voltage system (3), for generating the first trigger signal, the second trigger signal for triggering the second electronic discharge ball gap group and the third trigger signal for triggering imaging device that are used to trigger the first electronic discharge ball gap group and discharge；There is time interval T1 between first trigger signal and second trigger signal, there is time interval T2, wherein 0 between second trigger signal and the third trigger signal<T2<T1 and T2 are greater than the time for exposure of the imaging device.The imaging device of soil discharge channel of the present invention and the synchronization system and method for more impulse current generators, the synchronous triggering of two systems may be implemented, the image information of of short duration discharge process intermediate time is obtained, provides important data supporting for the analysis of soil multiple-pulse discharge mechanism.
Description
Technical field
The present invention relates to a kind of envelopes to monitor field, and in particular to a kind of soil electric discharge imaging device and more dash currents occur
Device synchronization system and method.
Background technique
In the lightning Protection Design of transmission line of electricity, the transient characterisitics of tower grounding device will affect the lightning protection effect of route,
And the discharge process of soil directly influences the transient characterisitics of earthing or grounding means, but tower grounding device transient characterisitics are ground at present
There are also very big differences for actual conditions when studying carefully condition and lightning stroke generation.
Lightning current have first breakdown multiple discharge characteristic, a thunder and lighting process usually contain for the first time electric discharge and repeatedly after
After fight back, average return stroke times are 3~5 times, fight back twice between average time interval be 60ms.Existing result of study table
It is bright, when the discharge process for the first time of lightning current is in earthing pole surrounding soil, strong spark can be generated in earthing pole surrounding soil
Electric discharge phenomena will form an irregular region of discharge, at this time the subsequent thunder of the dielectric of region of discharge near earthing pole
Electric current not yet restores completely before fighting back, and will form second breakdown under the action of subsequent counterattack thunder.
Research to Spark Discharges in soil, most intuitive way are exactly the image for shooting spark discharge in soil.
But the shooting research for soil spark discharge channel existing at present is generally using photographic film shooting and conductive paper method, sense
Ray film is laid with the development that can influence discharge channel to a certain extent in the soil, and the complexity of soil also will affect photoresists
The light sensitivity of piece；Conductive paper is the scatter plot that discharge channel in soil is recorded by its breakdown aperture, above-mentioned shooting side
The major defect of method is exactly shooting process complexity, and imaging effect is poor, low efficiency, and imaging results utilization rate is low.
The research of soil electric discharge phenomena is in blank under current more dash currents, and existing earthed system impact characteristics are ground
Study carefully using one impulse electric current as driving source, one impulse electric current can only simulate the electric discharge for the first time of thunder and lightning, but it is to earthing or grounding means
It can not consider the function and effect after rear counterattack.Soil discharge process is an of short duration and complicated process, only obtains discharge process
In voltage and current waveform cannot comprehensively reflect the essential mechanism of discharge process.Therefore, exist to obtain soil discharge channel
The image at difference lightning stroke moment studies time delay control by more impulse current generators simulation electric discharge for the first time and back discharge phenomenon
Device processed realize more impulse current generators and soil discharge channel imaging device synchronize be of great significance.
Summary of the invention
In view of this, to solve the above-mentioned problems, the present invention provides a kind of soil electric discharge imaging device and more dash currents
Generator synchronization system and method, the method to obtain soil inside spark discharge channel image.
To achieve the above object and other purposes, the present invention provide a kind of soil electric discharge imaging device and more dash currents hair
Raw device synchronization system, soil electric discharge imaging device include with more impulse current generator synchronization systems：
Be delayed high voltage system 3, believes for generating to be used to trigger the first of the first electronic discharge ball gap group electric discharge and trigger
Number, the second trigger signal for triggering the second electronic discharge ball gap group and the third trigger signal for triggering imaging device；
Between first trigger signal and second trigger signal have time interval T1, second trigger signal with
There is time interval T2 between the third trigger signal,
Wherein, 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
Optionally, the delay high voltage system includes the first delay controller 11, the second delay controller 12, first
Pulse amplifier 13, the second pulse amplifier 14 and photoelectric converter 15；
First delay controller 11 exports two ways of optical signals, wherein optical signal is input to first pulse and puts all the way
Big device 13, another way optical signal are input to the second pulse amplifier 14；The output end of first pulse amplifier and the first electricity
Dynamic discharge ball gap group connection is discharged for triggering the described first electronic discharge ball gap group 5；
Second delay controller 12 exports two ways of optical signals, wherein optical signal is input to first pulse and puts all the way
Big device 13, another way optical signal transport to the photoelectric converter 15, and the photoelectric converter is connected to x-ray imaging system；Institute
The output end for stating the second pulse amplifier is connect with the second electronic discharge ball gap group 6, for triggering the described second electronic discharge ball
Gap electric discharge.
Optionally, which further includes main controller, for snooze interval T1 to be written to first delay controller,
To second delay controller be written snooze interval T2, described 0<T2<T1 and T2 are greater than the exposure of the imaging device
Time.
Optionally, the main controller is also used to control the described second electronic discharge ball gap group 6 and second delays time to control
The synchronous triggering of device, is also used to control that first delay controller is synchronous with the first electronic discharge ball gap group 5 triggers.
To achieve the above object and other purposes, the present invention also provides a kind of soil electric discharge imaging device and more dash currents
Generator synchronous method, this approach includes the following steps：
Second delay controller 12 send the first trigger signal into the second pulse amplifier 14, is put by second pulse
The electronic discharge ball gap group 5 of big device triggering first is discharged；
After the described first electronic discharge ball gap group electric discharge T1 time interval, second is triggered by the first delay controller 11
Signal is sent into the first pulse amplifier 13, is triggered the second electronic discharge ball gap group 6 by first pulse amplifier and is discharged；
After the described first electronic discharge ball gap group electric discharge T2 time interval, second delay controller 12 touches third
Signalling is sent to imaging device, is triggered the imaging device and is detected to the discharge scenario inside soil；
Described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
Optionally, the time interval T1 is written from the main controller to first delay controller, between the time
It is written every T2 from the main controller to second delay controller.
Optionally, the described second electronic discharge ball gap group 6 is synchronous with second delay controller triggers, and described first prolongs
When controller triggering synchronous with the first electronic discharge ball gap group 5.
To achieve the above object and other purposes, the present invention also provides a kind of soil electric discharge imaging device and more dash currents
Generator synchronous method, this approach includes the following steps：
Make the first electronic discharge ball gap group electric discharge；
After the described first electronic discharge ball gap group electric discharge T1 time interval, make the second electronic discharge ball gap group electric discharge；
Triggering imaging device puts soil inside after the described second electronic discharge ball gap group electric discharge T2 time interval
Electric situation is detected；Wherein, described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
By adopting the above-described technical solution, the present invention has the advantage that：
The imaging device of soil discharge channel of the present invention and the synchronization system and method for more impulse current generators,
The synchronous triggering that two systems may be implemented, obtains the image information of of short duration discharge process intermediate time, puts for soil multiple-pulse
Electric Analysis on Mechanism provides important data supporting.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
The detailed description of one step：
Fig. 1 is the schematic illustration of apparatus of the present invention；
Fig. 2 is the logic time chart of more dash current electric discharge devices and x-ray imaging system synchronous method；
In figure, more than 1 first dash current generating device, more than 2 second dash current generating devices, 3 delay high voltage control systems
System, 4X radiation imaging system, 5 first electronic discharge ball gap groups, 6 first electronic discharge ball gap groups, 7 first harmonic inductance, 8 second
Harmonic inductance, 9 first wave regulating resistors, 10 second wave regulating resistors, 11 first time delay controllers, 12 second time delay controllers, 13
One pulse amplifier, 14 second pulse amplifiers, 15 photoelectric converters, 16X X-ray machine X, 17 sandboxs, 18 test soil, 19 metals
Electrode, 20 digital imagery plates, 21 image processing systems.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be noted that the basic conception that only the invention is illustrated in a schematic way is illustrated provided in the present embodiment,
Then only shown in schema with it is of the invention in related component rather than component count, shape and size when according to actual implementation draw
System, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel can also
It can be increasingly complex.
As shown in Figure 1, a kind of imaging device of soil discharge channel of the present invention and more impulse current generators into
The synchronous system of row, wherein the imaging device includes X-ray production apparatus 16, sandbox 17, test soil 18, metal electrode 19, number
Word imaging plate 20 and image processing system 21, more impulse current generators include first electronic the 5, first electricity of discharge ball gap group
Dynamic discharge ball gap group 6, the first harmonic inductance 7, the second harmonic inductance 8, the first wave regulating resistor 9 and the second wave regulating resistor 10, wherein
First electronic discharge ball gap group 5, the first harmonic inductance 7, the first wave regulating resistor 9 are sequentially connected in series more than first dash current of composition
Generating device 1, the second electronic discharge ball gap group 6, the second harmonic inductance 8, the second wave regulating resistor 10 are sequentially connected in series composition
More than two dash current generating devices 2, (wherein, the size dimension of the sandbox is 300* for the X-ray production apparatus light source 16, sandbox 17
200*200mm is made with insulating materials.Sandbox inner bottom surface and side are covered with copper sheet and are grounded.The metal electrode water of a length of 100mm
Lay flat and be placed in sandbox center), test soil 18, metal electrode 19, digital imagery plate 20 and image processing system 21 composition imaging
Device；Wherein, the X-ray production apparatus light source 16 connects the image processing system 21, and image processing system 21 connects digital imagery
Plate 20, test soil are encased in sandbox, and metal electrode is inserted into test soil.Metal electrode respectively with state the first harmonic
Resistance and the connection of the second wave regulating resistor.
The imaging device of soil discharge channel synchronizes system with more impulse current generators：
Be delayed high voltage system 3, believes for generating to be used to trigger the first of the first electronic discharge ball gap group electric discharge and trigger
Number, the second trigger signal for triggering the second electronic discharge ball gap group and the third trigger signal for triggering imaging device；
Between first trigger signal and second trigger signal have time interval T1, second trigger signal with
There is time interval T2 between the third trigger signal,
Wherein, 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
The X-ray production apparatus is commercially available module, rated output voltage 100-400kV, output-current rating 100-
800mA, maximum output voltage 100-300kV, maximum output current 80-500mA, maximum photography electric current is 200-
1000mA.The chief component of X-ray production apparatus includes X-ray bulb, X-ray machine power supply and control circuit, and X-ray penetrates energy
Power is mainly controlled by the tube voltage of X-ray machine, and the dosage of X-ray mainly has tube current control.When X-ray production apparatus receives delay high pressure
When the exposure signal of triggering system, X-ray production apparatus starts to expose, and the time for exposure is adjustable in 10ms.The digital imagery plate
It is commercially available module with image processing system, digital imagery plate is one piece of whole plate of 384mm × 460mm × 15mm, mainly by dodging
Bright body or fluorescent material, amorphous silicon layer and thin film semiconductor's array are constituted.Digital imagery plate can by the X-ray optical signal of absorption
Electric signal final output image is converted into image processing system.Digital imagery plate has the function of active probe X-ray, nothing
Need actively to trigger, can real-time reception optical signal and image output, imaging time 0-3s.
In this present embodiment, the rated output voltage 120kV of the X-ray production apparatus, output-current rating 400mA, most
Big output voltage is 150kV, maximum output current 500mA, and maximum photography electric current is 600mA.
The delay high voltage triggering system is customed product, and resolution ratio is 0.1 μ s.The delay high voltage triggering system packet
The first delay controller 11, the second delay controller 12, the first pulse amplifier 13, the second pulse amplifier 14 and photoelectricity is included to turn
Parallel operation 15；
First delay controller 11 exports two ways of optical signals, wherein optical signal is input to first pulse and puts all the way
Big device 13, another way optical signal are input to the second pulse amplifier 14；The output end of first pulse amplifier and the first electricity
Dynamic discharge ball gap group connection is discharged for triggering the described first electronic discharge ball gap group 5；
Second delay controller 12 exports two ways of optical signals, wherein optical signal is input to first pulse and puts all the way
Big device 13, another way optical signal transport to the photoelectric converter 15, and the photoelectric converter is connected to x-ray imaging system；Institute
The output end for stating the second pulse amplifier is connect with the second electronic discharge ball gap group 6, for triggering the described second electronic discharge ball
Gap electric discharge.
The controlled range of first delay controller is 0~500ms, and control precision is Microsecond grade, is mainly used for two sets of impacts
The control of current feedback circuit triggering time delay.Second delay controller controlled range is 0~600ms, is mainly used for more dash currents
The synchronously control of generating device and X-ray apparatus.First/second delay controller mainly by Time-delayed trigger controller, put by pulse
Big device, optic/electro converter box composition.First delay controller is used as trigger signal by two ways of optical signals output, all the way optical signal OP1
Input exports OP2 relative to OP1 for detecting external discharge, the output-controlled triggering phase angle in setting, another way optical signal
It is delayed or relative to optical signal input time delay.
First/second pulse amplifier is for triggering electronic discharge ball gap group igniting, when pulse amplifier input terminal receives
When to trigger pulse, output end can generate the high-voltage pulse greater than 10kV in a very short period of time, trigger discharge ball gap.
Photoelectric converter is the equipment that optical signal is reduced into electric signal, and input terminal is light input, and output end is electricity output.
In this present embodiment, from main controller to the first delay controller time-write interval T1, to the second delay controller
Time-write interval T2.The main controller is also used to control the touching synchronous with the first delay controller of the first electronic discharge ball gap group
Hair, is also used to control that the second electronic discharge ball gap group is synchronous with the second delay controller triggers.
In another embodiment, the present invention also provides a kind of soil discharge channel imaging devices and more impulse current generators
Synchronous method, this approach includes the following steps：
Second delay controller 12 send the first trigger signal into the second pulse amplifier 14, is put by second pulse
The electronic discharge ball gap group 5 of big device triggering first is discharged；
After the described first electronic discharge ball gap group electric discharge T1 time interval, second is triggered by the first delay controller 11
Signal is sent into the first pulse amplifier 13, is triggered the second electronic discharge ball gap group 6 by first pulse amplifier and is discharged；
After the described first electronic discharge ball gap group electric discharge T2 time interval, second delay controller 12 touches third
Signalling is sent to imaging device, is triggered the imaging device and is detected to the discharge scenario inside soil；
Described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
In this present embodiment, the first delay controller is embedded among charge-discharge control system, and through optical fiber respectively with two
The electric spark trigger for covering electronic discharge ball gap group is connected.First delay controller has autonomous triggering and detection triggering two
Kind operating mode.When work is in independently triggering mode, trigger signal is delivered to the first delays time to control by charge-discharge control system
Device is handled by the first delay controller and exports two paths of signals and sent respectively to two sets of electronic discharge ball gap groups,
Two paths of signals has set time delay, thus when the triggering electric discharge of two sets of electronic discharge ball gap groups of control
Between, being allowed to electric discharge has the time difference, realizes the output of more dash currents.When work when detecting triggering mode, charge and discharge control
Trigger signal is delivered to the first delay controller by system, and the first delay controller is fed directly to the first electronic discharge ball gap triggering
It discharges and discharge scenario is detected, when the first impulsive discharge success, the first delay controller will receive feedback signal, and
It is to start with this moment, is set after time delay to the second electronic discharge ball gap group conveying trigger signal, realizes the second impulsive discharge.
Specific delay time can be written among the first delay controller by computer software before discharge, and time delay controlled range is
0~500ms, control precision is Microsecond grade, to realize the output of more dash currents of different time intervals.
A set of independent second delay controller is connected with the second electronic discharge ball gap group and X-ray production apparatus triggering system,
So that when the second delay controller adjustable second electronic discharge ball gap group and X-ray production apparatus Startup time.Second electronic puts
Triggering logical relation and moment relationship between electric ball gap group and X-ray production apparatus are specific such as Fig. 2.The operation of more dash current devices
Control system is connected to the signal input part of the second delay controller through optical fiber, and the second delay controller can work defeated with 14
Outlet selects two of them output end to be respectively connected to spark trigger device and the X-ray production apparatus triggering of the first electronic discharge ball gap group
Device.
Reasonable decay time is set and is respectively written into time delay controller, such as the decay time of the first delay controller is
T1, the decay time of the second delay controller are T2.After more dash current device charging completes, clicks start on the operational platform
Button, input terminal of the charge-discharge control system through optical fiber conveying the first trigger signal to the second delay controller, the second delay
Controller can through optical fiber convey a trigger signal to the first electronic discharge ball gap group spark trigger and record this moment be 0
Moment.If the first delay controller works in detection triggering mode, when the first electronic discharge ball gap group triggering electric discharge, first prolongs
When controller detect that power generation starts, and convey after time delay T1 the second trigger signal to the first electronic discharge ball gap group triggering and put
Electricity realizes that the second dash current discharges at the 0+T1 moment.Second delay controller is after 0 moment exported the first trigger signal, warp
The trigger device that third trigger signal to x-ray imaging system is conveyed after time delay T2 makes its triggering shooting 0+T2 moment soil
Soil internal discharge situation picture.It, can be real as long as meeting 0 < T2 < T1 of relationship and the X-ray production apparatus time for exposure being much smaller than T2
Now more dash current electric discharge devices triggering synchronous with x-ray imaging system, and take more impulsive discharge process intermediate times
Soil internal discharge situation picture.
The method of the imaging of soil discharge channel and synchronous experiment under more dash currents, utilizes time delay device of the invention, warp
Determine under test parameters and pedotheque parameter, joint test circuit, more dash currents the pre-debug of X-ray production apparatus imaging experiment and
The imaging of soil discharge channel and synchronous experiment under more dash currents are carried out, steps are as follows for concrete scheme and pre-debug：
(1) test parameters and pedotheque parameter are determined
Test parameters and pedotheque parameter are determined according to test requirements document and planning first.Wherein experiment parameter mainly wraps
It includes：The first delay controller and the second delay controller and write-in delay T1, T2 of delay high voltage system；Pedotheque
Parameter mainly includes soil type, soil resistivity, sandbox and electrode size.
1. the time interval and first that determining first electronic discharge ball gap group and the first electronic discharge ball gap group trigger are electronic
The time interval of discharge ball gap group and X-ray production apparatus triggering.Before charging starts, pass through into control system with time delay respectively
Time delay needed for one delay controller and the second delay controller are written sets T1, T2.
2. determining soil parameters.The type of soil and the size of sandbox, electrode are determined according to test requirements document.Pass through adjusting
The water content and salt content of soil adjust soil resistivity.Cleaning removal admissible salt ingredient is carried out to pedotheque first, it is more
It is secondary clearly to cleaning solution salinity close to 0；Then drying removal soil moisture is carried out to pedotheque；Most followed by needed for test add
Add the water and salt of preset quality, wherein salt with NaCl crystal it is soluble in water after be added in soil.Then soil resistivity is measured
And it records.
(2) joint test circuit
After the completion of (1) step, test loop wiring is carried out according to apparatus of the present invention.By the interface of the first delay controller point
It is not connected with the ball gap of the ball gap of the first electronic discharge ball gap group and the second electronic discharge ball gap group, by the second delay controller
Interface is connected respectively at the first electronic discharge ball gap group with X-ray production apparatus.The output end of two sets of electronic discharge ball gap groups is woven
Copper strips connection is met on cable, is connected to the high-voltage end on metal electrode as soil discharge test, and is embedded to sandbox soil
Copper sheet connection ground line is covered among earth, in sandbox as ground terminal.
(3) X-ray production apparatus imaging experiment pre-debug under more dash currents
After the completion of (2) step, needs to carry out pre-debug to invention equipment, guarantee that the imaging effect of X-ray production apparatus is good
And it after the synchronization and triggered as normal between each equipment of high pressure linked system, can just be tested.
1., will first by X-ray production apparatus light source and sandbox and digital imaging plate is placed in same level and center line is aligned
Camera lens adjusts light source and opens, and sandbox is wrapped and is incident upon number by the part that the position up and down for adjusting camera lens irradiates light source
The centre of word imaging plate；
2. being discharged with the first electronic discharge ball gap group soil, dosage and the time for exposure of X-ray are then adjusted, is made
Time for exposure is less than T2, until the image definition that shooting obtains is effective, and saves the raw video before a soil electric discharge；
(4) more impulsive discharge tests are carried out
After the completion of (3) step, time interval T1, T2 of setting is respectively written into the first delay controller and second and is prolonged
When controller in, " charging " button for pressing main controller charges to electronic discharge ball gap group, after charging complete, click main controller
" triggering " button, the first pulse amplifier and the second pulse amplifier will trigger respectively two sets according to setting time delay T1 and electronic put
Electric ball gap group is discharged, and X-ray production apparatus is in T2 reception trigger signal and issues exposure signal.After the completion of test, " 0 " is obtained
Before moment, three different images at T1 moment and T2 moment, will be to complete primary more impulsive discharges after Image preservation and processing
Lower soil discharge channel imaging test.
The present invention also has following advantageous effects：
(1) high inside the soil of different moments under the available more dash currents of x-ray imaging device in the present invention
Precision discharge channel image overcomes previous shooting process complexity, and imaging effect is poor, the low difficulty of imaging results utilization rate, at
Picture speed is fast, and effect is intuitive.
(2) the aqueous sand in apparatus of the present invention test flume can simulate the soil at practical earthing or grounding means place, will be former
This needs becomes indoor progress in the test of outdoor progress, has not only saved experimentation cost, but also makes test by weather and environment
Effect substantially reduces.
(3) the control system with time delay control precision in the present invention is high, and controlled range is big.Can guarantee to pulsed discharge this
Of short duration process carries out effective time control, generates the multiple-pulse current waveform for meeting test demand.
(4) two sets of systems may be implemented in the synchronous method of the imaging device of soil discharge channel and more impulse current generators
The synchronous triggering of system, obtains the image information of of short duration discharge process intermediate time, provides for the analysis of soil multiple-pulse discharge mechanism
Important data supporting.
(5) the advantages that the method for the present invention has simple, easy to operate, and controllability is high.In addition, simulation test is at low cost,
Safety is good, can repeat the experimental study for simulating practical lightning stroke situation indoors, the accuracy of analog reslt and
High reliablity.
It the composite can be widely applied to the imaging work that pulse high current acts on the soil spark discharge channel of lower earthing or grounding means
Make, suitable for studying the pulse diffusing rule and soil discharge mechanism of the earthing or grounding means under lightning current effect.
In another embodiment, the present invention also provides a kind of soil electric discharge imaging device is synchronous with more impulse current generators
Method, this approach includes the following steps：
Make the first electronic discharge ball gap group electric discharge；
After the described first electronic discharge ball gap group electric discharge T1 time interval, make the second electronic discharge ball gap group electric discharge；
Triggering imaging device puts soil inside after the described second electronic discharge ball gap group electric discharge T2 time interval
Electric situation is detected；Wherein, described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Protection scope in.
Claims (8)
1. a kind of soil electric discharge imaging device and more impulse current generator synchronization systems, which is characterized in that including：
Be delayed high voltage system (3), for generates the first trigger signal for being used to trigger the first electronic discharge ball gap group and discharging,
Third trigger signal for triggering the second trigger signal of the second electronic discharge ball gap group and for triggering imaging device；
Between first trigger signal and second trigger signal have time interval T1, second trigger signal with it is described
There is time interval T2 between third trigger signal,
Wherein, 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
2. a kind of soil electric discharge imaging device according to claim 1 and more impulse current generator synchronization systems, special
Sign is that the delay high voltage system includes the first delay controller (11), the second delay controller (12), the first pulse
Amplifier (13), the second pulse amplifier (14) and photoelectric converter (15)；
First delay controller (11) exports two ways of optical signals, wherein optical signal is input to first pulse amplifying all the way
Device (13), another way optical signal are input to the second pulse amplifier (14)；The output end and first of first pulse amplifier
Electronic discharge ball gap group connection, for triggering the described first electronic discharge ball gap group (5) electric discharge；
Second delay controller (12) exports two ways of optical signals, wherein optical signal is input to first pulse amplifying all the way
Device (13), another way optical signal transport to the photoelectric converter (15), and the photoelectric converter is connected to x-ray imaging system；
The output end of second pulse amplifier is connect with the second electronic discharge ball gap group (6), electronic is put for triggering described second
Electric ball-gap discharge.
3. a kind of soil electric discharge imaging device according to claim 2 and more impulse current generator synchronization systems, this is
System further includes main controller, for snooze interval T1 to be written to first delay controller, to second delays time to control
Snooze interval T2 is written in device.
4. a kind of soil electric discharge imaging device according to claim 3 and more impulse current generator synchronization systems, described
Main controller is also used to control the triggering synchronous with second delay controller of the described second electronic discharge ball gap group (6), is also used to
Control first delay controller triggering synchronous with first electronic discharge ball gap group (5).
5. a kind of method that soil electric discharge imaging device and more impulse current generator synchronization systems synchronize, feature exist
In this approach includes the following steps：
Second delay controller (12) send the first trigger signal into the second pulse amplifier (14), is put by second pulse
Electronic discharge ball gap group (5) electric discharge of big device triggering first；
After the described first electronic discharge ball gap group electric discharge T1 time interval, the second triggering is believed by the first delay controller (11)
It number send into the first pulse amplifier (13), is discharged by the electronic discharge ball gap group (6) of first pulse amplifier triggering second；
After the described first electronic discharge ball gap group electric discharge T2 time interval, second delay controller (12) triggers third
Signal is sent to imaging device, is triggered the imaging device and is detected to the discharge scenario inside soil；
Described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
6. a kind of soil electric discharge imaging device according to claim 5 and more impulse current generator synchronous method, special
Sign is that the time interval T1 is written from the main controller to first delay controller, and the time interval T2 is by institute
Main controller is stated to be written to second delay controller.
7. a kind of soil electric discharge imaging device according to claim 6 and more impulse current generator synchronous method, special
Sign is that the second electronic discharge ball gap group (6) is synchronous with second delay controller to trigger, first delays time to control
Device triggering synchronous with first electronic discharge ball gap group (5).
8. a kind of soil electric discharge imaging device and more impulse current generator synchronous method, which is characterized in that this method include with
Lower step：
Make the first electronic discharge ball gap group electric discharge；
After the described first electronic discharge ball gap group electric discharge T1 time interval, make the second electronic discharge ball gap group electric discharge；
Triggering imaging device is to the electric discharge feelings inside soil after the described second electronic discharge ball gap group electric discharge T2 time interval
Condition is detected；Wherein, described 0<T2<T1 and T2 are greater than the time for exposure of the imaging device.
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| CN110045164A (en) * | 2019-05-14 | 2019-07-23 | 云南电网有限责任公司电力科学研究院 | The impulse voltage generator trigger device of more measuring device precise synchronizations |
| CN112394268A (en) * | 2019-08-16 | 2021-02-23 | 许继集团有限公司 | Impulse voltage wave chopping device |
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| CN107422239A (en) * | 2017-09-27 | 2017-12-01 | 重庆大学 | The more dash current discharge test device and methods of soil |
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