CN201725026U - Capacitive voltage divider below-the-line square-wave response experiment device - Google Patents
Capacitive voltage divider below-the-line square-wave response experiment device Download PDFInfo
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- CN201725026U CN201725026U CN2010202519852U CN201020251985U CN201725026U CN 201725026 U CN201725026 U CN 201725026U CN 2010202519852 U CN2010202519852 U CN 2010202519852U CN 201020251985 U CN201020251985 U CN 201020251985U CN 201725026 U CN201725026 U CN 201725026U
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Abstract
The utility model provides a capacitive voltage divider below-the-line square-wave response experiment device. The output of a square-wave signal source is connected to one end of an input signal cable, the other end of the input signal cable is connected with a tee connector, other two ends of the tee connector are respectively connected with one end of a source output signal cable and a short cable, the other end of the source output signal cable is connected with a source output signal connector, the other end of the short cable is connected with an electrode which is isolated from a capacitive voltage divider through an insulating material, an output terminal of the capacitive voltage divider is connected with one end of an output signal cable of the capacitive voltage divider, and the other end of the output signal cable of the capacitive voltage divider is connected with an output signal connector of the capacitive voltage divider. The capacitive voltage divider below-the-line square-wave response experiment device can realize the matching of the signal source, the radio frequency cable and the calibrated capacitive voltage divider, so as to measure input and output voltage of the calibrated capacitive voltage divider, and realize the analysis of square-wave response characteristics of the capacitive voltage divider.
Description
Technical field
The utility model belongs to the pulse high-voltage field of measuring technique, is specifically related to square-wave response experimental provision under a kind of capacitive divider line, is applied to the detection of the frequency response ability of the capacitive divider that uses on the pulse power device.
Background technology
Capacitive divider is a pulse high-voltage measuring sonde commonly used on the pulse power device.Voltage divider need be demarcated to determine performance parameters such as scale factor and frequency response ability.It is on-line proving that relevant regulations among the national military standard GJB6367-2008 " the square wave calibration method of nanosecond voltage divider and current coil " provides the capacitive divider scaling method, be that capacitive divider is installed on the measured device, realize for measured device feed-in pulse signal.Online calibration method need design corresponding signal feedthrough for measured device, for the insulation heap and the transmission line of some large-scale plants, realizes that there is certain difficulty in the feed-in of the fast forward position of nanosecond order square-wave signal.And because it is bigger to measure high-tension capacitive divider intrinsic standoff ratio, it is little to produce timing signal voltage divider output signal, the problem of waveform serious interference.In calibration process, also need to realize the impedance matching of signal source and measured device, may exist the voltage on the measured device to be lower than the output voltage of signal source and to mate the bad problem that causes wave form distortion.
The capacitive divider high-voltage arm that uses on the pulse power device is structure capacitive, so the scale factor should use on-line proving to determine.Demarcate if the use forward position is the signal of tens to hundred nanosecond orders, solve problem ratios such as feed-in and coupling and be easier to, but can not check the fast signal responding ability of capacitive divider the nanosecond order forward position.
Summary of the invention
Be the responding ability of check capacitive divider to the fast signal in nanosecond order forward position, the utility model provides square-wave response experimental provision under a kind of capacitive divider line.The utility model can be realized signal source, radio-frequency cable and the coupling of being demarcated voltage divider, measures the input and output voltage of being demarcated voltage divider, can realize the square-wave response characteristic analysis of capacitive divider.
Square-wave response experimental provision under the capacitive divider line of the present utility model is characterized in, the output of the square-wave signal source in the described device is connected to an end of input signal cable, and the other end of input signal cable is connected with three-way connector.The two ends in addition of three-way connector connect an end of source output signal cable and transit cable respectively, and the other end of source output signal cable is connected with source output signal connector, and the other end of transit cable is connected with electrode.Isolate by insulating material between electrode and the capacitive divider; The output terminal of capacitive divider is connected with an end of voltage divider output signal cable, and the other end of voltage divider output signal cable is connected with voltage divider output signal connector.
Electrode, capacitive divider and insulating material under the capacitive divider line of the present utility model in the circuit of square-wave response experimental provision form a structure capacitive.
The pulse voltage of the square-wave signal source in the utility model by input signal cable and build-out resistor by oscillograph test channel record, the three-way connector that is connected with the input signal cable is coupled to capacitive divider with square-wave signal source voltage by electrode and insulation, and electrode and capacitive divider form the high-voltage arm electric capacity of timing signal under the line.The voltage divider output signal cable is connected to the oscillograph test channel, the output signal of record capacitive divider.The length of transit cable is 0.5cm ~ 1.5cm between three-way connector and the electrode, corresponding electrical length 0.025 ~ 0.075 ns, and therefore the square-wave pulse to ns magnitude forward position does not influence.Owing to during calibration experiment, do not change the structure of capacitive divider under the line, so the distribution parameter of voltage divider and frequency response ability do not change.Design suitable electrode area and insulation thickness, the capacitive reactance that can make high-voltage arm electric capacity can be considered high resistant much larger than 50 Ω, therefore for not influence of the 50 Ω loops that constitute by source output signal cable, build-out resistor and oscillograph test channel.Simultaneously, suitable electrode and insulation also can make the capacitive divider output voltage amplitude suitable, have satisfied the demand of the square wave demarcation of capacitive divider.
The utility model can solve FD feed that capacitive divider the occurs during on-line proving problem that distorts on some large-scale plants insulation heap and transmission line, check the responding ability of capacitive divider to the fast signal in nanosecond order forward position surely by the line subscript of capacitive divider.Timing signal, because the reactance of the capacitive divider in parallel with the pull-up resistor loop is very high, the equivalent load of square-wave signal source is 50 Ω, has directly realized impedance matching and need not to use impedance transformer, and is simple in structure and avoided because the signal distortion problem that impedance mismatching causes.Because the output voltage of line subscript timing capacitor voltage divider is by electrode area and insulation thickness decision, the design suitable dimensions can obtain the output voltage of hundred millivolts of magnitudes, has therefore improved signal to noise ratio (S/N ratio), can solve the interference problem of timing signal.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the circuit theory diagrams of the utility model embodiment.
The waveform effect figure that Fig. 3 obtains for the utility model embodiment.
Among the figure, 1. square-wave signal source 2. input signal cables 3. three-way connectors 4. source output signal cable 5. source output signal connectors 6. transit cables 7. electrodes 8. insulating material 9. capacitive dividers 10. voltage divider output signal cable 11. voltage divider output signal connectors 21. high-voltage arm electric capacity 22. ground capacitance 31. build-out resistors 32. integrating circuit 33. oscillograph test channel I 34. oscillograph test channel II.
Embodiment
Below in conjunction with the accompanying drawing detailed description the utility model is described in further detail.
Embodiment
Fig. 1 is a structural representation of the present utility model, and as can be seen from Figure 1, in the square-wave response experimental provision, the output of square-wave signal source 1 is connected to an end of input signal cable 2 under the capacitive divider line of the present utility model.The other end of input signal cable 2 is connected with three-way connector 3.The two ends in addition of three-way connector 3 are connected with an end of an end that is connected source output signal cable 4 and transit cable 6 respectively.The other end of source output signal cable 4 is connected with source output signal connector 5, and the other end of transit cable 6 is connected with electrode 7.Isolate by insulating material 8 between electrode 7 and the capacitive divider 9, the output terminal of capacitive divider 9 is connected with an end of voltage divider output signal cable 10, and the other end of voltage divider output signal cable 10 is connected with voltage divider output signal connector 11.Transit cable 6 length are 1 centimetre in the present embodiment.
Fig. 2 is the circuit theory diagrams in the utility model.As can be seen from Figure 2, the pulse output voltage of square-wave signal source 1 is connected to the loop of two parallel connections after by input signal cable 2 in the utility model.A loop is to be the source output signal cable 4 of 50 Ω by wave impedance, and resistance value is build-out resistor 31 and the oscillograph test channel I33 composition of 50 Ω.Because this loop is 50 a Ω coupling, so the waveform that oscillograph test channel I33 is write down is the pulse output voltage of square-wave signal source 1, i.e. the input voltage of capacitive divider.Another loop is capacitive divider 9 and output loop thereof, comprises voltage divider output signal cable 10, integrating circuit 32 and oscillograph test channel II34, and oscillograph test channel II34 obtains the output voltage of capacitive divider.In Fig. 2, capacitive divider 9 usefulness high-voltage arm electric capacity 21 and ground capacitance 22 replacing representations.High-voltage arm electric capacity 21 is structure capacitives of capacitive divider 9 and insulating material 8 and electrode 7 formation.When the thickness of area that electrode 7 is set and insulating material 8 is desired value, make the capacitive reactance of high-voltage arm electric capacity 21 be far longer than 1 k Ω, then this loop is to the not influence of another shunt circuit by source output signal cable 4.According to the intrinsic standoff ratio of high-voltage arm electric capacity 21, can obtain the suitable output voltage of amplitude and signal to noise ratio (S/N ratio) with the numerical evaluation capacitive divider 9 of integrating circuit 32.The input and output voltage of contrast capacitive divider 9 can be realized the square-wave response analysis of capacitive divider 9.
The waveform effect figure that Fig. 3 obtains for the utility model embodiment.The model that square-wave signal source adopts Hewlett-Packard to produce in the present embodiment is the product of HP8114A.Upper waveform is the source signal output waveform among Fig. 3; Middle and the waveform of below are the voltage divider output waveform that the utility model obtains when being connected different capacitive dividers, and the horizontal ordinate of oscillogram is 20 ns/ lattice.Middle output waveform is consistent with the source signal output waveform, shows that the capacitive divider square-wave response is qualified; The output waveform and the source signal output waveform of below are inconsistent, show that the capacitive divider square-wave response is defective.Can check the responding ability of capacitive divider by the utility model to the fast signal in nanosecond order forward position.
More than be to be outer integration type to detailed description of the present utility model according to capacitive divider 9, and connect that the mode of integrating circuit 32 carries out.Can expect; if it is build-out resistor that voltage divider output signal connector 11 connects; the mode of use numerical integration obtains the output voltage of capacitive divider behind the wave recording; perhaps capacitive divider 9 is from the integration type capacitive divider; voltage divider output signal connector 11 connects the modes such as output voltage that directly obtain capacitive divider of build-out resistor, also within protection domain of the present utility model.
Claims (2)
1. square-wave response experimental provision under the capacitive divider line, it is characterized in that: the output of the square-wave signal source in the described device (1) is connected to an end of input signal cable (2), and the other end of input signal cable (2) is connected with three-way connector (3); The two ends in addition of three-way connector (3) connect an end of source output signal cable (4) and transit cable (6) respectively, the other end of source output signal cable (4) is connected with source output signal connector (5), and the other end of transit cable (6) is connected with electrode (7); Isolate by insulating material (8) between electrode (7) and the capacitive divider (9); The output terminal of capacitive divider (9) is connected with an end of voltage divider output signal cable (10), and the other end of voltage divider output signal cable (10) is connected with voltage divider output signal connector (11).
2. square-wave response experimental provision under the capacitive divider line according to claim 1 is characterized in that: the length of described transit cable (6) is 0.5 cm～1.5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202519852U CN201725026U (en) | 2010-07-09 | 2010-07-09 | Capacitive voltage divider below-the-line square-wave response experiment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202519852U CN201725026U (en) | 2010-07-09 | 2010-07-09 | Capacitive voltage divider below-the-line square-wave response experiment device |
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| CN201725026U true CN201725026U (en) | 2011-01-26 |
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| CN2010202519852U Expired - Lifetime CN201725026U (en) | 2010-07-09 | 2010-07-09 | Capacitive voltage divider below-the-line square-wave response experiment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548752A (en) * | 2015-12-09 | 2016-05-04 | 上海华岭集成电路技术股份有限公司 | Testing system capable of improving signal to noise ratio of excitation signal |
| CN107422203A (en) * | 2017-07-03 | 2017-12-01 | 中国电力科学研究院 | A kind of system and method for checking impulse current shunt |
| CN113109614A (en) * | 2021-04-16 | 2021-07-13 | 中国工程物理研究院流体物理研究所 | Capacitive voltage divider and transmission line device with electronic interference protection function |
| CN113589014A (en) * | 2021-03-30 | 2021-11-02 | 中国电力科学研究院有限公司 | Square wave response device of resistance-capacitance voltage divider, square wave response optimization method and system |
-
2010
- 2010-07-09 CN CN2010202519852U patent/CN201725026U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548752A (en) * | 2015-12-09 | 2016-05-04 | 上海华岭集成电路技术股份有限公司 | Testing system capable of improving signal to noise ratio of excitation signal |
| CN107422203A (en) * | 2017-07-03 | 2017-12-01 | 中国电力科学研究院 | A kind of system and method for checking impulse current shunt |
| CN113589014A (en) * | 2021-03-30 | 2021-11-02 | 中国电力科学研究院有限公司 | Square wave response device of resistance-capacitance voltage divider, square wave response optimization method and system |
| CN113589014B (en) * | 2021-03-30 | 2024-02-13 | 中国电力科学研究院有限公司 | Square wave response device of resistance-capacitance voltage divider, square wave response optimization method and system |
| CN113109614A (en) * | 2021-04-16 | 2021-07-13 | 中国工程物理研究院流体物理研究所 | Capacitive voltage divider and transmission line device with electronic interference protection function |
| CN113109614B (en) * | 2021-04-16 | 2023-08-08 | 中国工程物理研究院流体物理研究所 | Capacitive voltage divider with electronic interference protection function and transmission line device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20110126 |