CN109557490A - The caliberating device and method of fast pulse measuring probe are used for based on pulse current source - Google Patents
The caliberating device and method of fast pulse measuring probe are used for based on pulse current source Download PDFInfo
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- CN109557490A CN109557490A CN201811367236.3A CN201811367236A CN109557490A CN 109557490 A CN109557490 A CN 109557490A CN 201811367236 A CN201811367236 A CN 201811367236A CN 109557490 A CN109557490 A CN 109557490A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
The present invention provides a kind of caliberating device and method that fast pulse measuring probe is used for based on pulse current source, calibrates the sensitivity and frequency response of impulsive measurement probe, which has very important significance to the stabilization of pulse power device and safe operation.The caliberating device includes sequentially connected primary pulse source, pulse-forming line, pulse shaping main switch, pulse transmission line, calibration chamber and matched load；Matched load includes high-tension resistive, low resistance and the matched load inner ring coaxially set gradually from inside to outside, matched load centre ring, matched load outer ring；High-tension resistive setting is among matched load inner ring, the matched load between ring, and it is electrically connected respectively with ring among matched load inner ring, matched load, low resistance is arranged among matched load between ring, matched load outer ring, and it is electrically connected respectively with ring, matched load outer ring among matched load, matched load outer ring ground connection, matched load inner ring are electrically connected with pulse transmission line.
Description
Technical field
The present invention relates to technical field of pulse power, and in particular to one kind is visited based on pulse current source for fast pulse measurement
The caliberating device and method of head.
Background technique
The simulation different spaces environment such as high-current pulsed electron beam, the hard X of pulse and gamma-rays is generated using pulse power device
Under radiation environment, be one of basic means of irradiation effects.In pulse power device, the various measurements on device are visited
Head be for device for monitoring and analyzing whether the critical component of safety and stability, if these measuring probes measurement result owe
Failure accurately or unreliable, that greatly covering device is likely to occur, or even cause device operation failure, it causes to radiate
Environment is difficult to reach research requirement.
Impulse current measurement probe is one of most common measuring probe in pulse power device, and what is generallyd use is
Rogowski coil and small divertor etc..Calibration is carried out to impulse current measurement probe to have very important significance, and is marked
Fixed mainly to account in terms of two, one is amplitude calibration, secondly for response calibration.Amplitude is demarcated mainly to the spirit of probe
Sensitivity is demarcated, that is, provides the ratio of size of current and size of current to be measured that probe measurement arrives；Response calibration is mainly to spy
The frequency characteristic of head is demarcated, that is, examines the high frequency response and low frequency response ability of probe.
Currently, due to the pulse current calibrating platform for lacking uncertainty tractability, in numerous pulse power devices
Impulse current measurement probe cannot all provide the higher measurement result of confidence level and its uncertainty.
Summary of the invention
The present invention provides a kind of caliberating device and method that fast pulse measuring probe is used for based on pulse current source, to pulse
The sensitivity and frequency response of measuring probe are demarcated, which has the stabilization of pulse power device and safe operation non-
Often important meaning.
The technical scheme is that
A kind of caliberating device being used for fast pulse measuring probe based on pulse current source, including sequentially connected primary pulse
Source, pulse-forming line, pulse shaping main switch, pulse transmission line, calibration chamber and matched load；The matched load includes more
A high-tension resistive, multiple low resistances and the matched load inner ring coaxially set gradually from inside to outside, ring among matched load,
Matched load outer ring；The setting of multiple high-tension resistives is born with match respectively among matched load inner ring, the matched load between ring
Carry inner ring, ring electrical connection among matched load, multiple low resistances be arranged among matched load ring, matched load outer ring it
Between, and be electrically connected respectively with ring, matched load outer ring among matched load, the matched load outer ring ground connection, the matching is negative
Inner ring is carried to be electrically connected with pulse transmission line.
Further, the pulse-forming line include pulse-forming line inner cylinder, pulse-forming line outer cylinder, sealed connecting component and
Sealing plate；The pulse-forming line outer cylinder is co-axially located at the outside of pulse-forming line inner cylinder, and is provided with feed liquor on its barrel
Mouth, liquid outlet and gas vent；Through-hole is set on the barrel of the pulse-forming line inner cylinder；The sealed connecting component is arranged in pulse
The two sides for forming line inner cylinder, for being electrically connected with primary pulse source, pulse shaping main switch；The sealing plate is arranged in pulse form
At the two sides of line inner cylinder, pulse-forming line outer cylinder, pulse-forming line outer cylinder is sealed；
The pulse transmission line is identical as pulse shaping cable architecture, the sealed connecting component and pulse form of the pulse transmission line
At main switch, calibration chamber electrical connection.
Further, the pulse shaping main switch includes insulation crust, switch upper electrode and switchs lower electrode, described exhausted
Edge shell is sleeve-like configuration, and the switch upper electrode is linner ball tip electrode, and electrode is ball tip electrode under the switch, described
Switch upper electrode and the lower electrode of switch are separately positioned on the both ends of insulation crust.
Further, the electrode edge chamfering of the switch upper electrode is R2.5mm, the bulb of electrode half under the switch
Diameter is 7.5mm, and the switch upper electrode and the gap switched between lower electrode are 1~7mm, and material is brass, the insulation
The material of shell is organic glass, and the working gas medium in insulation crust is nitrogen.
Further, the primary pulse source is composed in series by impulse capacitor, gas spark switch and charging inductance, is filled
Inductance is solenoid structure.
Further, the section of the matched load inner ring, matched load centre ring and matched load outer ring is positive polygon
Shape, one end of the matched load inner ring are equipped with bottom cover, and bottom cover center is equipped with connection through-hole.
Further, the matched load further includes cable connector, and the cable connector insulation set is outside matched load
On ring or matched load inner ring, and be electrically connected by ring among conducting wire and matched load or cable connector directly and matched load
Intermediate ring electrical connection.
Further, the calibration chamber includes calibration chamber outer cylinder and calibration chamber inner cylinder, the calibration chamber outer cylinder
It being sleeved on the outside of calibration chamber inner cylinder, the calibration chamber outer cylinder is arranged between pulse transmission line and matched load outer ring, and
By flanged joint, the calibration chamber inner cylinder is arranged between pulse transmission line and matched load inner ring, and passes through crimping side
Formula realizes electrical connection.
Further, the characteristic impedance of the calibration chamber is 98 Ω, electrical length 0.1ns；The pulse-forming line
Characteristic impedance be 5 Ω, electrical length 100ns；The characteristic impedance of the pulse transmission line is 5 Ω, and electrical length is
100ns。
Further, the matched load includes ten high-tension resistives and ten low resistances, ten high-tension resistive circumference
It is uniformly distributed and radially fixed between matched load inner ring and the intermediate ring of load；Ten low resistance circumference uniform distributions and it is radially fixed
Among matched load between ring and matched load outer ring, the resistance value of high-tension resistive is 50 ohm, and the resistance value of low resistance is 0.5 Europe
Nurse.
Meanwhile the present invention also provides a kind of using the above-mentioned calibration dress based on pulse current source for fast pulse measuring probe
The scaling method set, comprising the following steps:
1) it will be mounted on to test coil in calibration chamber；
2) DC charging is carried out to primary pulse source, after charging voltage reaches setting value, primary pulse source exports microsecond
The pulse voltage of magnitude；
3) pulse voltage for exporting primary pulse source loads on pulse-forming line, and by pulse-forming line to pulse
It forms main switch and carries out pulse charge, after reaching the self-breakdown voltage of pulse shaping main switch, the conducting of pulse shaping main switch,
And generate a pulse square wave electric current；
4) the pulse square wave electric current that step 3) obtains is transmitted on calibration chamber and matched load by pulse transmission line,
With the pulse square wave calibration with current signal waveform is obtained in load, the response wave shape to pulse square wave electric current is obtained to test coil；
5) using the pulse square wave calibration with current signal waveform obtained on matched load, the pulse square wave electricity that test coil obtains is treated
It flows response wave shape and carries out Sensitivity Calibration and uncertainty transmission analysis, obtain the response parameter to test coil.
Compared with prior art, the present invention having following technical effect that
1. a kind of caliberating device for fast pulse measuring probe is provided the present invention is based on coaxial line pulse shaping principle,
The reference current that uncertainty tractability is generated using the caliberating device marks common impulse current measurement probe
It is fixed, can sensitivity to probe and frequency response calibrate, and its uncertainty can be provided simultaneously, to pulse power
The stabilization of device and safe operation have very important significance.
2. compared to other impulse current measurements probe caliberating device, caliberating device of the present invention can reduce current measurement
The extrapolation range of probe calibration result, improves the signal-to-noise ratio of nominal data, is conducive to carry out the calibration of pulse high current measuring probe
Technical research.
3. the of the invention caliberating device uses modular design method, i.e., by each of the caliberating device at unit all
Design is independent module, and modules, which are carried out assembling, can be completed the integral installation of calibrating platform, and can have needle
Some unit module is repaired and is safeguarded to property.
4. matched load of the present invention uses coaxial radiation shape structure, the structure inductance of matched load is reduced, matching is negative
High-tension resistive and low resistance in load constitute a resitstance voltage divider again, can measure the pulse square wave of pulse coaxial line inner cylinder
Voltage waveform, and low resistance also constitutes a small divertor, can measure the pulse square wave electricity by pulse coaxial line
Flow waveform；Radial structure, which is also facilitated, to be connect with the inner cylinder of pulse coaxial line with outer cylinder.
5. primary pulse source of the invention is composed in series by impulse capacitor, gas spark switch and charging inductance, realize
To the pulse charge of pulse-forming line, further realizes and obtain the pulse side of higher magnitude under lower charging voltage
Wave.
6. pulse shaping main switch in the present invention is short air gap high gas pressure switch, which reduce the structure inductance of switch,
Realize the pulse square wave that more fast rise time is obtained on matched load.
7. matched load of the invention is made of ten resistance branch, each branch routes high-tension resistive and low resistance group
At the resistance value of high-tension resistive is 50 ohm, and the resistance value of low resistance is 0.5 ohm, effectively reduces the structure electricity of matched load
Sense.
Detailed description of the invention
Fig. 1 is caliberating device structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of pulse shaping main switch of the present invention；
Fig. 3 is the structural schematic diagram of pulse-forming line of the present invention；
Fig. 4 is the structural schematic diagram of coaxial radiation shape matched load of the present invention；
Fig. 5 is the structural schematic diagram that present invention calibration chamber is connected with matched load；
Fig. 6 is the pulse square wave waveform diagram in nanosecond pulse square wave current source of the present invention；
Fig. 7 is resitstance voltage divider operation principle schematic diagram in matched load of the present invention.
Appended drawing reference: 1- primary pulse source, 2- pulse-forming line, 3- pulse shaping main switch, 4- pulse transmission line, 5- mark
Determine chamber, 6- matched load, 21- pulse-forming line inner cylinder, 22- pulse-forming line outer cylinder, 23- sealed connecting component, 24- sealing
Plate, 25- inlet, 26- liquid outlet, 27- gas vent, 28- through-hole, 31- insulation crust, 32- switch upper electrode, under 33- is switched
Electrode, 51- calibration chamber outer cylinder, 52- calibration chamber inner cylinder, 61- matched load inner ring, 62- matched load centre ring, 63-
With load outer ring, 64- high-tension resistive, 65- low resistance, 66- cable connector.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
It is popped one's head in and is carried out to impulse current measurement by the square-wave pulse with the nanosecond rise time and with certain amplitude
Calibration is a kind of reliable implementation method, key problem first is that how to obtain the uncertainty of measurement of pulse calibration electric current.
The present invention provides a kind of caliberating device that fast pulse measuring probe is used for based on pulse current source, can sensitivity to probe and
Frequency response is calibrated, and can provide its uncertainty simultaneously, is had to the stabilization and safe operation of pulse power device
Very important meaning.
The principle of caliberating device of the present invention is: firstly, carrying out DC charging to primary pulse source 1, charge voltage range is
10~50kV, after charging voltage reaches setting value, primary pulse source 1 exports the pulse voltage of musec order, the pulse voltage
Load carries out pulse charge to pulse shaping main switch 3 on pulse-forming line 2, and through pulse-forming line 2, when reaching pulse
After forming the self-breakdown voltage of main switch 3, pulse shaping main switch 3 is connected, and generates a pulse square wave, finally, passing through arteries and veins
It rushes transmission line 4 pulse square wave is transmitted on calibration chamber 5 and matched load 6, the calibration for probe header to be measured.
It is as shown in Figure 1 the structural representation the present invention is based on pulse current source for the caliberating device of fast pulse measuring probe
Figure, including sequentially connected primary pulse source 1, pulse-forming line 2, pulse shaping main switch 3, pulse transmission line 4, calibration chamber
5 and matched load 6；Specifically, primary pulse source 1 is connected with pulse-forming line 2 by fastening screw, pulse shaping main switch
3 are connected across between pulse-forming line 2 and pulse transmission line 4, and calibration chamber 5 passes sequentially through fastening screw with matched load 6 and connects
In 4 end of pulse transmission line.
Primary pulse source 1 is composed in series by impulse capacitor, gas spark switch and charging inductance, and charging inductance is helical
Pipe structure.Primary pulse source 1 realizes the pulse charge to pulse-forming line 2, further realizes in lower charging electricity
Pressure obtains the pulse square wave of higher magnitude.
Fig. 3 is the structural schematic diagram of pulse-forming line 2, and pulse-forming line 2 includes pulse-forming line inner cylinder 21, pulse shaping
Line outer cylinder 22, sealed connecting component 23 and sealing plate 24；Pulse-forming line inner cylinder 21 is located at the axle center position of pulse-forming line outer cylinder 22
It sets, inlet 25, liquid outlet 26 and gas vent 27 is provided on the barrel of pulse-forming line outer cylinder 22；Pulse-forming line inner cylinder 21
Barrel on be arranged through-hole 28 (22 liquid of pulse-forming line outer cylinder is entered into pulse-forming line inner cylinder 21)；Sealed connecting component 23 is set
It sets in the two sides of pulse-forming line inner cylinder 21, for being electrically connected with primary pulse source 1, pulse shaping main switch 3, while to pulse
21 both ends of line inner cylinder are formed to be sealed；Sealing plate 24 be arranged in pulse-forming line inner cylinder 21, pulse-forming line outer cylinder 22 two
Side, concretely poly (methyl methacrylate) plate, the sealing of pulse-forming line outer cylinder 22 carry out water-stop by poly (methyl methacrylate) plate, have sealing plate 24
Another effect of machine glass plate is played a supporting role to pulse-forming line inner cylinder 21, and 21 He of pulse-forming line inner cylinder is also used for
High voltage pulse insulation between pulse-forming line outer cylinder 22.
Pulse-forming line 2 in the present invention is identical with 4 structure of pulse transmission line, and the outer cylinder of pulse transmission line 4 passes through respectively
Flange and bolt and pulse shaping main switch, calibration chamber, sealed connecting component and pulse shaping main switch, the mark of pulse transmission line
Determine chamber electrical connection.
Fig. 2 is the structural schematic diagram of pulse shaping main switch 3 in the present invention, and pulse shaping main switch 3 can be high for short air gap
Baroswitch, including insulation crust 31, switch upper electrode 32 and the lower electrode 33 of switch, insulation crust 31 is sleeve-like configuration, is opened
It shuts electrode 32 and switchs the both ends that lower electrode 33 is separately positioned on insulation crust 31.The work of pulse shaping main switch 3 is being hit certainly
It wears under mode, working gas medium is nitrogen (N2), and switch upper electrode 32 is linner ball tip electrode, and electrode edge chamfering is
R2.5mm, switching lower electrode 33 is ball tip electrode, and Probe-radius 7.5mm, switch electrode is brass (H62), switch insulation
The material of shell 31 is organic glass.The discharging gap of pulse shaping main switch 3 is designed as that 1~7mm is adjustable, and clearance distance passes through
The gasket at linner ball tip electrode end is adjusted.When the discharging gap of main switch is 4mm, the inner gas pressure of switch reaches 0.6MPa
When, self-breakdown voltage can achieve 100kV, and switch gap 5mm, designed switch tolerance air pressure is up to 1MPa.
Fig. 4 be 6 structural schematic diagram of coaxial radiation shape matched load of the present invention, matched load 6 including multiple high-tension resistives 64,
Ring 62 among multiple low resistances 65 and from inside to outside the matched load inner ring 61 of coaxial successively nested setting, matched load,
Matched load outer ring 63；Ten high-tension resistives 64 are evenly distributed with and radially fixed setting is among matched load inner ring 61, matched load
It between ring 62, and is electrically connected respectively with ring 62 among matched load inner ring 61, matched load, ten low resistances 65 are evenly distributed with and diameter
To being fixed between ring 62 among matched load, matched load outer ring 63, and respectively with ring 62 among matched load, match
It loads outer ring 63 to be electrically connected, the Bottom ground of matched load outer ring 63, matched load inner ring 61 is electrically connected with pulse transmission line 4.
Matched load inner ring 61 is decagon structure, and circular hole is opened at the center on every one side, in the bottom of matched load inner ring 61
The heart is provided with through-hole 28, connects convenient for the inner cylinder of same pulse-forming line 2；One end of high-tension resistive 64 by fastening screw with match
Load inner ring 61 is connected on one side, and the other end of high-tension resistive 64 passes through ring 62, low pressure among straight-through screw rod and matched load
One end of resistance 65 is connected；The other end of low resistance 65 is connected on one side by fastening screw and matched load outer ring 63
It connects, the cable connector 66 of matched load outer ring 63 being wherein provided on one side for pulse measure, cable connector 66 passes through
The junction of ring 62 is connected among conducting wire and low resistance 65 and matched load.Or 66 insulation set of cable connector is matching
It loads in outer ring 63 or matched load inner ring 61, and passes through the electrical connection of ring 62 or cable connector 66 among conducting wire and matched load
Directly it is electrically connected with ring 62 among matched load.The resistance value of high-tension resistive 64 can be 50 ohm；The resistance value of low resistance 65 can be
0.5 ohm.
It is coaxial that matched load 6 of the invention realizes pulse-forming line 2 and pulse transmission line 4 in Pulse Power Techniques etc.
The terminal impedance of line matches, and can measure on pulse coaxial line nanosecond high voltage pulse waveform and coaxial by pulse simultaneously
The pulse current waveform of line.From figure 7 it can be seen that high voltage pulse Ui (the i.e. arteries and veins of the transmission of pulse transmission line 4 of matched load 6
Rush square wave) it is sequentially connected in series with high-tension resistive 64 and low resistance 65, one end of low resistance 65 is connect with high-tension resistive 64, another
End ground connection；Also it is connected with measurement cable Z while one end of high-tension resistive 64 is connect with low resistance 65, R0 is measurement matching electricity
Resistance.High voltage pulse Ui is loaded on high-tension resistive 64, and high-tension resistive 64 and low resistance 65 form bleeder circuit, then in low pressure
Action of low-voltage pulse identical with high voltage pulse waveform to be measured will be obtained on resistance 65, proportionate relationship between the two is resistance
The sensitivity of divider, value are the resistance value ratio of high-tension resistive 64 and low resistance 65.In electric current, the electricity of measurement matched load 6
When the data such as pressure, measuring device is connected with cable connector 66, surveyed waveform is defeated by coax signal cable Z on low resistance 65
Enter onto oscillograph, and final impulse waveform is presented.
Fig. 5 is the structural schematic diagram demarcating chamber 5 and matched load 6 in the present invention and connecting, and calibration chamber 5 includes calibration chamber
Outdoor cylinder 51 and calibration chamber inner cylinder 52, calibration chamber outer cylinder 51 are sleeved on 52 outside of calibration chamber inner cylinder, demarcate chamber outer cylinder
51 are arranged between the pulse-forming line outer cylinder of pulse transmission line 4 and matched load outer ring 63, and by flanged joint, demarcate chamber
Indoor cylinder 52 is arranged between the sealed connecting component of pulse transmission line 4 and matched load inner ring 61, and is realized by crimping mode
Electrical connection.
Specific application example is given below: in a typical pulse power supply, the impedance of pulse-forming line is 5 ohm,
Electrical length is 100ns, and pulse-forming line terminal carries out impedance matching using the coaxial radiation shape matched load in the present invention, when
When charging voltage on pulse coaxial line is 50kV, then it is 50kV, pulse that pulse voltage amplitude can be measured on matched load
Current amplitude is the square wave of 10.3kA, and the forward position of pulse square wave is 8.3ns, as shown in Figure 6.Pulse current amplitude is not known
Degree is analyzed, and it is 3.5% (expanded uncertainty factor k=2) that its uncertainty of measurement, which can be obtained,.
The present invention, which is realized, carries out traceability and standardization calibration to fast pulse measuring probe, accurate, reliable to obtain
Measuring probe amplitude response and frequency response.
Meanwhile the present invention also provides a kind of using the above-mentioned calibration dress based on pulse current source for fast pulse measuring probe
The scaling method set, comprising the following steps:
1, it will be mounted on to test coil in calibration chamber 5；
2, DC charging is carried out to primary pulse source 1, gas after charging voltage reaches setting value, in primary pulse source
Spark switch conducting, primary pulse source export the pulse voltage of musec order；
3, the pulse voltage load on pulse-forming line 2, and by pulse-forming line 2 to pulse shaping main switch 3 into
Row pulse charge, after reaching the self-breakdown voltage of pulse shaping main switch 3, pulse shaping main switch 3 is connected, and generates one
Pulse square wave electric current；
4, pulse square wave electric current is transmitted on calibration chamber 5 and matched load 6 by pulse transmission line 4, on matched load
The pulse square wave current waveform will be obtained, and the response wave shape to pulse square wave electric current will be obtained to test coil；
5, using the pulse square wave calibration with current signal waveform obtained on matched load, the pulse square wave electricity that test coil obtains is treated
It flows response wave shape and carries out Sensitivity Calibration and uncertainty transmission analysis, obtain the response parameter to test coil.Especially by mark
The ratio of the pulse voltage amplitude of standing wave shape and response wave shape obtains the sensitivity to test coil, by the pulse of response wave shape
The liter time obtains the time response parameter to test coil.The two parameters are the response parameter to test coil.
Claims (10)
1. a kind of caliberating device for being used for fast pulse measuring probe based on pulse current source, it is characterised in that: including being sequentially connected
Primary pulse source (1), pulse-forming line (2), pulse shaping main switch (3), pulse transmission line (4), calibration chamber (5) and
With load (6)；
The matched load (6) include multiple high-tension resistives (64), multiple low resistances (65) and from inside to outside it is coaxial successively
The matched load inner ring (61) of setting, matched load centre ring (62), matched load outer ring (63)；
The setting of multiple high-tension resistives (64) among matched load inner ring (61), the matched load between ring (62), and respectively with
It is electrically connected with ring (62) among load inner ring (61), matched load, ring is arranged among matched load in multiple low resistances (65)
(62), it between matched load outer ring (63), and is electrically connected respectively with ring (62), matched load outer ring (63) among matched load,
Matched load outer ring (63) ground connection, the matched load inner ring (61) are electrically connected with pulse transmission line (4).
2. the caliberating device according to claim 1 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the pulse-forming line (2) includes pulse-forming line inner cylinder (21), pulse-forming line outer cylinder (22), sealed connecting component (23)
With sealing plate (24)；
The pulse-forming line outer cylinder (22) is co-axially located at the outside of pulse-forming line inner cylinder (21), and is provided on its barrel
Inlet (25), liquid outlet (26) and gas vent (27)；Through-hole (28) are set on the barrel of the pulse-forming line inner cylinder (21)；
Sealed connecting component (23) setting is used for and primary pulse source (1), pulse in the two sides of pulse-forming line inner cylinder (21)
Form main switch (3) electrical connection；The sealing plate (24) is arranged in pulse-forming line inner cylinder (21), pulse-forming line outer cylinder (22)
Two sides, by pulse-forming line outer cylinder (22) seal；
The pulse transmission line (4) is identical as pulse-forming line (2) structure, the sealed connecting component of the pulse transmission line (4) with
Pulse shaping main switch (3), calibration chamber (5) electrical connection.
3. the caliberating device according to claim 1 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the pulse shaping main switch (3) includes insulation crust (31), switch upper electrode (32) and switchs lower electrode (33), described
Insulation crust (31) is sleeve-like configuration, and the switch upper electrode (32) is linner ball tip electrode, and electrode (33) is under the switch
Ball tip electrode, the switch upper electrode (32) and switch lower electrode (33) are separately positioned on the both ends of insulation crust (31).
4. the caliberating device according to claim 3 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the electrode edge chamfering of the switch upper electrode (32) is R2.5mm, and the Probe-radius of electrode (33) is under the switch
7.5mm, the switch upper electrode (32) and the gap switched between lower electrode (33) are 1~7mm, and material is brass, described
The material of insulation crust (31) is organic glass, and the working gas medium in insulation crust (31) is nitrogen.
5. the caliberating device according to claim 1 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the primary pulse source (1) is composed in series by impulse capacitor, gas spark switch and charging inductance, and charging inductance is spiral shell
Wire tube structure.
6. the caliberating device according to any one of claims 1 to 5 that fast pulse measuring probe is used for based on pulse current source,
Be characterized in that: the section of ring (62) and matched load outer ring (63) is positive among the matched load inner ring (61), matched load
Polygon, one end of the matched load inner ring (61) are equipped with bottom cover, and bottom cover center is equipped with connection through-hole.
7. the caliberating device according to claim 6 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the matched load (6) further includes having for measuring pulse signal cable connector (66), and the cable connector (66) is by leading
The junction of ring (62) is electrically connected among line and low resistance (65) and matched load.
8. the caliberating device according to claim 7 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the calibration chamber (5) includes calibration chamber outer cylinder (51) and calibration chamber inner cylinder (52), the calibration chamber outer cylinder (51)
It is sleeved on the outside of calibration chamber inner cylinder (52), the calibration chamber outer cylinder (51) is arranged in pulse transmission line (4) and matched load
Between outer ring (63), and by flanged joint, the calibration chamber inner cylinder (52) is arranged in pulse transmission line (4) and matched load
Between inner ring (61), and electrical connection is realized by crimping mode.
9. the caliberating device according to claim 8 for being used for fast pulse measuring probe based on pulse current source, feature are existed
In: the matched load (6) includes ten high-tension resistives (64) and ten low resistances (65), ten high-tension resistive (64) circumference
It is uniformly distributed and radially fixed between matched load inner ring (61) and matched load centre ring (62)；Ten low resistance (65) circumference
Between the uniformly distributed and radially fixed ring among matched load (62) and matched load outer ring (63), the resistance value of high-tension resistive (64) is
50 ohm, the resistance value of low resistance (65) is 0.5 ohm, and the characteristic impedance of calibration chamber (5) is 98 Ω, and electrical length is
0.1ns；The characteristic impedance of the pulse-forming line (2) is 5 Ω, electrical length 100ns；The spy of the pulse transmission line (4)
Sign impedance is 5 Ω, electrical length 100ns.
10. using the mark of any caliberating device based on pulse current source for fast pulse measuring probe of claim 1 to 9
Determine method, which comprises the following steps:
1) it will be mounted on to test coil in calibration chamber；
2) DC charging is carried out to primary pulse source, after charging voltage reaches setting value, primary pulse source exports musec order
Pulse voltage；
3) pulse voltage for exporting primary pulse source loads on pulse-forming line, and by pulse-forming line to pulse shaping
Main switch carries out pulse charge, after reaching the self-breakdown voltage of pulse shaping main switch, the conducting of pulse shaping main switch, and produce
A raw pulse square wave electric current；
4) the pulse square wave electric current that step 3) obtains is transmitted on calibration chamber and matched load by pulse transmission line, and matching is negative
The pulse square wave calibration with current signal waveform is obtained in load, obtains the response wave shape to pulse square wave electric current to test coil；
5) it using the pulse square wave calibration with current signal waveform obtained on matched load, treats the pulse square wave electric current that test coil obtains and rings
It answers waveform to carry out Sensitivity Calibration and uncertainty transmission analysis, obtains the response parameter to test coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367236.3A CN109557490B (en) | 2018-11-16 | 2018-11-16 | Calibration device and method for fast pulse measurement probe based on pulse current source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367236.3A CN109557490B (en) | 2018-11-16 | 2018-11-16 | Calibration device and method for fast pulse measurement probe based on pulse current source |
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| CN109557490A true CN109557490A (en) | 2019-04-02 |
| CN109557490B CN109557490B (en) | 2020-11-17 |
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| CN201811367236.3A Expired - Fee Related CN109557490B (en) | 2018-11-16 | 2018-11-16 | Calibration device and method for fast pulse measurement probe based on pulse current source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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