CN202075322U - Fast-response passive resistance differentiator with two matched ends - Google Patents
Fast-response passive resistance differentiator with two matched ends Download PDFInfo
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- CN202075322U CN202075322U CN201120011022XU CN201120011022U CN202075322U CN 202075322 U CN202075322 U CN 202075322U CN 201120011022X U CN201120011022X U CN 201120011022XU CN 201120011022 U CN201120011022 U CN 201120011022U CN 202075322 U CN202075322 U CN 202075322U
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Abstract
The utility model relates to a fast-response passive resistance differentiator with two matched ends for realizing pulse signal infinitesimal calculus, which is matched with a differential prove for use and is applicable to high-voltage large-current fast-pulse measurement. The fast-response passive resistance differentiator comprises an input end matched resistor, an integrating resistor, an integrating capacitor, an output end matched resistor, an input cable base, an input end cover plate, a differentiator outer shell, an integrating capacitor connecting disc, an output end cover plate, an output cable base and an outer shell. The differentiator takes full consideration of the problems that the two ends are matched when a measurement cable is connected, selects a through capacitor in thread connection and increases the length of the integrating resistor, so as to reduce the stray inductance of the integrating capacitor and distributed capacitance at the two ends of the integrating capacitor, reduce the unfavorable influence of the differentiator on wave form measurement and expand the upper response frequency limit of the differentiator, thereby being suitable for high-voltage large-current pulse measurement in nanosecond to microsecond time order.
Description
Technical field
The utility model relates to a kind of passive capacitance-resistance integrator of fast-response that can realize the both-end coupling of pulse signal integration computing, is used with differential probe, is applied to the measurement of high-voltage large current fast pulse.
Technical background
In the Pulse Power Techniques field, for the measurement of high-voltage large current fast pulse, adopt differential probe through regular meeting, such as derivative-type capacitive divider, Luo-coil etc., and differential signal need obtain former tested waveform by integral operation.Integral operation both can adopt numerical integration also can adopt the device integration.When adopting numerical integration, need carry out pre-service to the signal before the integration, such as removing drift, choosing the period of integration etc., otherwise the waveform behind the integration may have than big-difference with original waveform, and adopting numerical integration can not show the waveform of measured signal in real time, above-mentioned just reason has limited the application of numerical integration.
The time range of high-voltage large current fast pulse usually nanosecond to the microsecond time frame, the device integration often adopts passive capacitance-resistance integrator.Because the spectral range of measuring-signal is wide, so the match condition at the distribution parameter of integrator self and two ends can cause that waveform distorts, in the time of seriously even can't obtain correct measured signal.For reducing the influence of integrator, need to optimize the parameter of integration device and the structure of the integrator especially connected mode between the device is designed measured waveform.Wait the utility model patent " the passive capacitance-resistance integrator of coaxial type " of application as gongwu research institute soldier, integrator is a coaxial configuration, integrating capacitor is special thin slice circular ring structure, and integrating capacitor has adopted the electric connecting mode of crimping, reduce the stray inductance of integrator, improved the frequency response upper limit of integrator.
The utility model has been considered integrator output input two ends and the coupling of measuring cable, adopted the integrating capacitor of punching structure, further reduced the distributed inductance of integrating capacitor, improved the frequency response upper limit of integrator, by increasing the length of integrating resistor, reduced the influence of distributed capacitance simultaneously to measuring.
Summary of the invention
Do not consider the problem of both-end coupling in order to overcome existing passive capacitance-resistance integrator, simultaneously in order to improve the response frequency of integrator, reduce integrator adverse effect to waveform when measuring fast signal, the utility model provides a kind of passive capacitance-resistance integrator of fast-response of both-end coupling.This integrator has considered to connect the problem of two ends coupling when measuring cable, and the stray inductance of integrating capacitor and the two ends distributed capacitance of integrating resistor have been reduced, reduced the adverse effect of integrator to measured waveform, expanded the response frequency upper limit of integrator, be applicable to the measurement of nanosecond to the pulse of microsecond time frame high-voltage large current.
The passive capacitance-resistance integrator of fast-response of both-end coupling of the present utility model, comprise the input end build-out resistor, integrating resistor, integrating capacitor, the output terminal build-out resistor, the input end cable block, the input end cover plate, the integrator shell, the integrating capacitor terminal pad, the output terminal cover plate, the output terminal cable block, it is characterized in that: the input end cable block is the standard cable seat, in integrator inside, the heart yearn of cable block is parallel to the shell of integrator by some low inductance film resistances, the resistance of back in parallel resistance is 50 Ω, consistent with the impedance of measuring cable, integrator input end build-out resistor adopts the screw crimping to connect, the output terminal cable block is the standard cable seat, between the heart yearn of integrator internal integral electric capacity and output terminal cable block by the 49 Ω resistance of connecting, realize output terminal and the impedance matching of measuring cable, integrator is a coaxial configuration.
The shell of above-mentioned integrator is that two semicircular ring butt joints form, and the feed-through capacitor that integrating capacitor adopts thread connecting mode does not have line between integrating capacitor and the integrator shell, has reduced the stray inductance of integrating capacitor.
Above-mentioned integrator, its input end build-out resistor is that 6 resistances are the low inductance film resistance formation in parallel of 300 Ω, integrating resistor is that 2～3 resistances are the low inductance film resistance series connection formation of hundreds of Ω, integrating capacitor is the punching structure, capacitance is 4～10nF, and specifically the integration constant by integrator determines.One utmost point of electric capacity is the heart yearn of integrating capacitor, and another is the set bolt of electric capacity very, and the output terminal build-out resistor is that resistance is the low inductance film resistance of 49 Ω.
The passive capacitance-resistance integrator of fast-response of both-end coupling of the present utility model, be characterized in: the input end of (1) integrator is the standard cable seat, in integrator inside, the heart yearn of cable block is parallel to the shell of integrator by some low inductance film resistances, the resistance of back in parallel resistance is consistent with the impedance of measuring cable, has avoided the catadioptric of measuring-signal at the integrator input end; (2) integrator input end build-out resistor adopts the connected mode of screw crimping, when having avoided welding temperature too high to resistance infringement and simplified operation; (3) output terminal of integrator also is the standard cable seat, realizes output terminal and the impedance matching of measuring cable by resistance in series between integrator internal integral electric capacity and cable block heart yearn, has avoided the catadioptric of measuring-signal at integrator output terminal; (4) integrator is a coaxial configuration, and shell is that two semicircular ring butt joints form, and integrating capacitor has adopted the feed-through capacitor of thread connecting mode.Present integrating capacitor is generally several ceramic disks electric capacity parallel connections and is welded on the integrating resistor, or adopts screw to be crimped onto on the integrating resistor, and is therefore bigger with the stray inductance of connecting of integrating capacitor, can draw measured waveform and distort.Do not have line between integrating resistor of the present utility model and the integrating capacitor, farthest reduced the series connection stray inductance, improved the response frequency upper limit of integrator; (5) reduce the distributed capacitance at resistance two ends by the length that increases integrating resistor, reduced the distortion of distributed capacitance measured waveform.Show by the data investigation, existing integrator is not considered the influence of integrating resistor distributed capacitance to measuring, but utilize the equivalent electrical circuit simulation to show, the distributed capacitance at integrating resistor two ends is obvious to the measured waveform influence, and its importance is only second to the influence of integrating capacitor stray inductance.
Integrator of the present utility model two ends have all been considered and the coupling of measuring cable, and by the stray inductance of reduction integration device and the distributed capacitance at integrating resistor two ends, improved the response frequency upper limit of integrator, overcome wave form distortion problems such as the overshoot that when measuring ns magnitude Fast-Pulse Measuring, can occur, concussion, can be used for the measurement of high-voltage large current fast pulse.
Description of drawings
Fig. 1 is an equivalent circuit diagram of the present utility model.
Fig. 2 is the vertical section structure figure of first embodiment of the utility model.
Fig. 3 is the cut-open view of I-I direction among Fig. 2.
Fig. 4 is the view of II-II direction among Fig. 2.
Among the figure, 1. input end build-out resistor, 2. integrating resistor, 3. integrating capacitor, 4. output terminal build-out resistor, 5. input end cable block, 6. input end cover plate, 7. integrator shell, 8. integrating capacitor terminal pad, 9. output terminal cover plate, 10. output terminal cable block.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present utility model.
The resistance of input end build-out resistor 1 is consistent with the measurement cable resistance, is 50 Ω; To between tens of k Ω, determined by the integration time constant of measurement requirement for number nF, concrete numerical value by the value of integrating capacitor 3 at hundreds of Ω for the value of integrating resistor 2; The resistance of output terminal build-out resistor 4 is 49 Ω a little less than the impedance of measuring cable, and the main effect of output terminal build-out resistor 4 is to absorb from oscillograph to return the voltage wave of integrator along measuring the cable reverse transfer.
The physical dimension of the utility model embodiment is Φ 26 * 140mm (comprising the two ends cable block), compact conformation, and critical piece is axially symmetric structure.
Among Fig. 2～Fig. 4, the shell 7 of integrator is that the butt joint of two semicircular ring forms, and interface is a nested structure, can effectively shield the external electromagnetic radiation.
Input end build-out resistor 1 is that 6 resistances are the low inductance film resistance formation in parallel of 300 Ω, can effectively reduce the inductance of input end build-out resistor 1.
Integrating capacitor 3 is the punching structure, and capacitance is 6nF, and a utmost point of electric capacity is the heart yearn of integrating capacitor, and another is the set bolt of electric capacity very.The structure of integrating capacitor 3 and connected mode can effectively reduce the stray inductance of integrating capacitor.
Output terminal build-out resistor 4 is that resistance is the low inductance film resistance of 49 Ω.
The main installation process of the utility model embodiment is: (1) welds together an end of input end build-out resistor 1, the heart yearn of input end cable block 5 and an end of integrating resistor 2; (2) after the input end cable block after will welding 5 fixed with input end cover plate 6, the other end with input end build-out resistor 1 was screwed on input end cover plate 6 again; (3) integrating capacitor 3 is tightened be fixed on the integrating capacitor terminal pad 8, realized that integrating capacitor 3 connects over the ground; (4) 3 integrating resistors 2 are joined end to end weld together, the heart yearn of the other end of integrating resistor 2 and integrating capacitor 3 welds together; (5) with output terminal cable block 10 and output terminal cover plate 9 by screw retention good after, an end of output terminal build-out resistor 4 is welded to the heart yearn of output terminal cable block 10, the other end of resistance and integrating capacitor 3 another pole piece lines weld; (6) utilize screw that integrator shell 7 and input end cover plate 6, integrating capacitor terminal pad 8, output terminal cover plate 9 are fixed.The utility model embodiment installation.
Claims (3)
1. the passive capacitance-resistance integrator of fast-response of both-end coupling, comprise the input end build-out resistor, integrating resistor, integrating capacitor, the output terminal build-out resistor, the input end cable block, the input end cover plate, the integrator shell, the integrating capacitor terminal pad, the output terminal cover plate, the output terminal cable block, it is characterized in that: the input end cable block is the standard cable seat, in integrator inside, the heart yearn of cable block is parallel to the shell of integrator by some low inductance film resistances, the resistance of back in parallel resistance is 50 Ω, consistent with the impedance of measuring cable, integrator input end build-out resistor adopts the screw crimping to connect, the output terminal cable block is the standard cable seat, between the heart yearn of integrator internal integral electric capacity and output terminal cable block by the 49 Ω resistance of connecting, realize output terminal and the impedance matching of measuring cable, integrator is a coaxial configuration.
2. the passive capacitance-resistance integrator of fast-response of both-end coupling as claimed in claim 1 is characterized in that shell is that two semicircular ring butt joints form, and integrating capacitor adopts the feed-through capacitor of thread connecting mode.
3. the passive capacitance-resistance integrator of fast-response of both-end coupling as claimed in claim 1 or 2, it is characterized in that the input end build-out resistor is that 6 resistances are the low inductance film resistance formation in parallel of 300 Ω, integrating resistor is that 2～3 resistances are the low inductance film resistance series connection formation of hundreds of Ω, integrating capacitor is the punching structure, capacitance is 4～10nF, one utmost point of electric capacity is the heart yearn of integrating capacitor, and another is the set bolt of electric capacity very, and the output terminal build-out resistor is that resistance is the low inductance film resistance of 49 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120011022XU CN202075322U (en) | 2011-01-14 | 2011-01-14 | Fast-response passive resistance differentiator with two matched ends |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120011022XU CN202075322U (en) | 2011-01-14 | 2011-01-14 | Fast-response passive resistance differentiator with two matched ends |
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| Publication Number | Publication Date |
|---|---|
| CN202075322U true CN202075322U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120011022XU Expired - Fee Related CN202075322U (en) | 2011-01-14 | 2011-01-14 | Fast-response passive resistance differentiator with two matched ends |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743926A (en) * | 2013-12-24 | 2014-04-23 | 浙江大学 | Independent differential-integral high-voltage probe |
| CN106154013A (en) * | 2016-06-17 | 2016-11-23 | 西安交通大学 | A kind of compound Luo-coil integrating resistor and manufacture method thereof |
-
2011
- 2011-01-14 CN CN201120011022XU patent/CN202075322U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743926A (en) * | 2013-12-24 | 2014-04-23 | 浙江大学 | Independent differential-integral high-voltage probe |
| CN103743926B (en) * | 2013-12-24 | 2016-04-06 | 浙江大学 | A kind of independent differential-integrahigh-voltage high-voltage probe |
| CN106154013A (en) * | 2016-06-17 | 2016-11-23 | 西安交通大学 | A kind of compound Luo-coil integrating resistor and manufacture method thereof |
| CN106154013B (en) * | 2016-06-17 | 2018-12-04 | 西安交通大学 | A kind of compound Rogowski coil integrating resistor and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20130114 |