CN206460704U - A kind of Schering bridge reverse wiring presentation device of theory - Google Patents
A kind of Schering bridge reverse wiring presentation device of theory Download PDFInfo
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- CN206460704U CN206460704U CN201720123719.3U CN201720123719U CN206460704U CN 206460704 U CN206460704 U CN 206460704U CN 201720123719 U CN201720123719 U CN 201720123719U CN 206460704 U CN206460704 U CN 206460704U
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- bridge
- reverse wiring
- schering
- presentation device
- display screen
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- 238000012360 testing method Methods 0.000 claims abstract description 68
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000003028 elevating effect Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model relates generally to a kind of Schering bridge reverse wiring presentation device of theory, including support and the demonstration board being fixed on support, the demonstration board is made up of Schering bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and the part of control area four, and the Schering bridge reverse wiring area of display includes the first bridge arm being made up of adjustable resistance, the second bridge arm composed in parallel by noninductive fixed resistance and tunable capacitor, the 3rd bridge arm composed in parallel by test item resistance and test item electric capacity, the four bridge legs being made up of standard capacitance；The back side of the demonstration board is provided with dsp chip, and the Schering bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and control area are connected with dsp chip；The support includes two elevating levers and is arranged on the supporting plate of elevating lever bottom.Trainee by apparatus for demonstrating, have to the balance adjustment principle and adjusting method of Schering bridge reverse wiring it is more vivid, profoundly understand.
Description
Technical field
The utility model is related to a kind of Schering bridge reverse wiring presentation device of theory.
Background technology
The dielectric dissipation factor and capacitance that dielectric is surveyed using Schering bridge principle are a kind of very typical methods,
Schering bridge is divided into two kinds of modes of connection of positive wiring and reverse wiring, and the circuit structure of both modes of connection is different, the scope of application
Also it is different.During wiring measurement positive using Schering bridge, pontic is in low potential, easy-to-operate, and because is not tested
The influence of product parasitic capacitance over the ground, measurement is accurate.But when using positive wiring measurement, it is desirable to test item two ends can be exhausted over the ground
Edge, such as condenser-type terminal, coupled capacitor device.However, in substation field, device housings are nearly all dead earths, therefore
The measuring method of positive wiring is subject to certain restrictions.Schering bridge reverse wiring is used in the situation of the pole of test item one ground connection, for example：
Dielectric dissipation factor and capacitance, the dielectric dissipation factor of measurement current transform er end shield of measuring transformer winding and sleeve
And capacitance etc., at the scene using relatively broad.
The dielectric loss tester made is encapsulated in tool housing, on the one hand, can not directly observe inside
Structure, understands its operation principle；On the other hand, instrument is automatically performed test, it is impossible to understand its specific test process.If directly
With circuit, each component builds the circuit, then, then carries out circuit balancing regulation, on the one hand not directly perceived enough, image；The opposing party
Face is lost time more and demonstrating effect is poor.For the student or trainee of first contacts dielectric loss testing experiment,
It is difficult to quickly grasp the adjusting method of Schering bridge；For teacher or trainer, be also not easy to explanation knowwhy or
Person instructs practical operation, and this has become one of key issue of restriction teaching or training.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of Schering bridge reverse wiring principle demonstration
Device, dexterously solves the key issue in the presence of above-mentioned teaching, training, passes through the observation to the apparatus for demonstrating and actual behaviour
Make, trainee can have to the mode of connection of Schering bridge reverse wiring clearly, intuitively to be recognized, to its balance adjustment principle with
That adjusting method has is more vivid, profoundly understand.
The technical scheme that the utility model is used is：
A kind of Schering bridge reverse wiring presentation device of theory, including support and the demonstration board being fixedly mounted on support, institute
Demonstration board is stated by Schering bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and control area
Four parts constitute, the Schering bridge reverse wiring area of display include be made up of adjustable resistance the first bridge arm, by noninductive fixation
The second bridge arm that resistance and tunable capacitor are composed in parallel, the 3rd bridge arm composed in parallel by test item resistance and test item electric capacity,
The four bridge legs being made up of standard capacitance, the first bridge arm, the second bridge arm, the 3rd bridge arm and four bridge legs are constituted as four articles of branch roads
Schering bridge reverse wiring illustrative circuitry, four bridge arms are set by light emitting diode assembling form respectively；The standard capacitance with it is in parallel
Noninductive fixed resistance and tunable capacitor public connecting end ground connection；The back side of the demonstration board is provided with dsp chip, the west
Woods electric bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and control area with dsp chip phase
Even；The support includes two elevating levers and is arranged on the supporting plate of elevating lever bottom, and demonstration board is adjusted by elevating lever
Highly, the bottom of the supporting plate is provided with 4 universal wheels, is easy to shift position as needed.
Further, the adjustable resistance display screen and tunable capacitor that the regulation parameter viewing area includes setting gradually are aobvious
Display screen, the adjustable resistance display screen and tunable capacitor display screen are connected with dsp chip.
Further, the test result viewing area includes display test result button, the test item electricity set gradually
Capacity display screen, dielectric dissipation factor display screen；The display test result button, test item capacitance display screen and medium are damaged
Consumption factor display screen is connected with dsp chip.
Further, the control area is including the supply hub of spaced set, power switch and test item are pressed successively
Button；The supply hub, power switch and test item button are connected with dsp chip.
Further, the public connecting end of first bridge arm and the 3rd bridge arm and second bridge arm and four bridge legs
Alternating-current galvanometer is connected between public connecting end.
Further, the public connecting end of first bridge arm and the second bridge arm and the 3rd bridge arm and four bridge legs
Can external power supply between public connecting end.
Further, the top of the adjustable resistance is provided with the first adjusting knob being connected with adjustable resistance, described first
Adjusting knob is connected with dsp chip.
Further, the top of the tunable capacitor is provided with the second adjusting knob being connected with tunable capacitor, described second
Adjusting knob is connected with dsp chip.
Further, the support is made up of rubber-plastics material, plays fixed, supporting role.
Compared with prior art, the beneficial effects of the utility model are：
(1) the utility model reduces the quantity of component, adds demo function, and XiLin electricity is constituted using four bridge arms
Bridge reverse wiring circuit carries out lecture experiment by external power supply and exchange inspection stream instrument；In Schering bridge reverse wiring circuit, subject
One end ground connection of 3rd bridge arm where product, therefore reverse wiring mode is applied to the dielectric loss of measurement tested device one end grounding apparatus
Factor and capacitance；Trainee can be by the demonstration teaching aid, clear, directly perceived, deep, rapidly grasp Schering bridge reversal connection
The circuit theory and balance adjusting method of line；By pressing test item button, connect by test item resistance and test item electric capacity simultaneously
Joint group into the 3rd bridge arm, and the numerical value of test item occurs at random, is easy to student repeatedly to repeat operation；
(2) trainee can adjust the first adjusting knob and the second adjusting knob manually, can pass through during regulation
The throw of pointer situation of alternating-current galvanometer is observed, to judge whether electric bridge reaches poised state；Student can be practiced by the process
The method for practising regulation Schering bridge balance；
(3) after bridge balance, the numerical value of adjustable resistance can be shown in adjustable resistance display screen automatically, automatically adjustable
Electric capacity display screen shows the numerical value of tunable capacitor；Trainee can be gone out according to the numerical computations of adjustable resistance and tunable capacitor by
Test product capacitance and dielectric dissipation factor, then press display test result button, with test item capacitance display screen and medium
The numerical value shown in loss factor display screen is compareed, and checks whether oneself is calculated correct.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Wherein, the 1, first bridge arm, the 2, second bridge arm, the 3, the 3rd bridge arm, 4, four bridge legs, 5, alternating-current galvanometer, 6, first
Adjusting knob, the 7, second adjusting knob, 8, adjustable resistance display screen, 9, tunable capacitor display screen, 10, test item capacitance shows
Screen, 11, dielectric dissipation factor display screen, 12, display test result button, 13, test item button, 14, power switch, 15, electricity
Source jack, 16, elevating lever, 17, universal wheel, 18, demonstration board, 19, the positive wiring area of display of Schering bridge, 20, regulation parameter shows
Show region, 21, test result viewing area, 22, control area, 23, supporting plate.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of Schering bridge reverse wiring presentation device of theory, including support and it is fixedly mounted on support
Demonstration board 18, the support is made up of rubber-plastics material, plays fixed, supporting role；The support includes two elevating levers 16 and set
The supporting plate 23 in elevating lever bottom is put, the height of demonstration board, the bottom of the supporting plate 23 are adjusted by two elevating levers 16
Portion is provided with 4 universal wheels 17, is easy to shift position as needed.The demonstration board 18 is by Schering bridge reverse wiring area of display
19th, regulation parameter viewing area 20, test result viewing area 21 and the part of control area 21 4 composition；The demonstration board 18
The back side is provided with dsp chip.
The Schering bridge reverse wiring area of display 19 is included by adjustable resistance R3Composition the first bridge arm 1, by noninductive solid
Determine resistance R4With tunable capacitor C4The second bridge arm 2 for composing in parallel, by test item resistance RxWith test item electric capacity CxCompose in parallel
3rd bridge arm 3, by standard capacitance CnThe four bridge legs 4 of composition, the first bridge arm 1, the second bridge arm 2, the 3rd bridge arm 3 and four bridge legs
4 constitute Schering bridge reverse wiring illustrative circuitry as four branch roads, and four bridge arms are set by light emitting diode assembling form respectively.Institute
State the public connecting end A of the first bridge arm 1 and the 3rd bridge arm 3 and second bridge arm 2 and four bridge legs 4 public connecting end B it
Between be connected with alternating-current galvanometer 5, the alternating-current galvanometer 5 is used for detecting whether current potential balances between A and B, when electric between A and B
When position is uneven, the pointer of alternating-current galvanometer 5 can deflect；When potential balance between A and B, the pointer of alternating-current galvanometer 5
Positioned at meter middle, do not deflect.The public connecting end C of first bridge arm and the second bridge arm and the 3rd bridge arm and
Can external power supply between the public connecting end D of four bridge legs.The standard capacitance CnWith noninductive fixed resistance R in parallel4With it is adjustable
Electric capacity C4Public connecting end ground connection.The adjustable resistance R3Top be provided with the first adjusting knob 6 for being connected with adjustable resistance；
The tunable capacitor C4Top be provided with the second adjusting knob 7 for being connected with tunable capacitor.The adjustable resistance of first bridge arm 1
R3, the second bridge arm 2 noninductive fixed resistance R4With tunable capacitor C4, the 3rd bridge arm 3 test item resistance RxWith test item electric capacity Cx、
The standard capacitance C of four bridge legs 4n, alternating-current galvanometer 5, the first adjusting knob 6, the second adjusting knob equal 7 with dsp chip phase
Connection.
The regulation parameter viewing area 20 includes the adjustable resistance display screen 8 and tunable capacitor display screen 9 set gradually,
The adjustable resistance display screen 8, tunable capacitor display screen 9 are connected with dsp chip.After bridge balance, the adjustable resistance
Display screen 8 is used for adjustable resistance R after automatic display bridge balance3Value, the tunable capacitor display screen 9 is used for automatic display
Tunable capacitor C after bridge balance4Value.
The test result viewing area 21 include set gradually display test result button 12, dielectric dissipation factor show
Display screen 11 and test item capacitance display screen 10, the display test result button 12, dielectric dissipation factor display screen 11 and by
Test product capacitance display screen 10 is connected with dsp chip.After test terminates, display test result button 12, test knot are pressed
Fruit can show in test item capacitance display screen 10 and dielectric dissipation factor display screen 11.Test item capacitance display screen 10 is used
Come show test terminate after test item capacitance CxValue；Dielectric dissipation factor display screen 11 is used for after showing that test terminates
The dielectric dissipation factor tan δ of test item.
The control area 22 includes the supply hub 15 of spaced set, power switch 14 and test item button successively
13, the supply hub 15, power switch 14 are connected with the power pins of dsp chip, for being powered to the dsp chip；Institute
State test item button 13 with dsp chip to be connected, after test item button 13 is pressed, by test item electric capacity CxWith test item electricity
Hinder RxThe 3rd bridge arm 3 composed in parallel is lit, and shows that test item has accessed circuit, and the numerical value of the test item is random
Occur, the numerical value provided every time is different, is easy to student or student repeatedly to repeat operation.
It is not new to this practicality although above-mentioned embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deform still in protection model of the present utility model
Within enclosing.
Claims (9)
1. a kind of Schering bridge reverse wiring presentation device of theory, including support and the demonstration board being fixedly mounted on support, it is special
Levy and be, the demonstration board by Schering bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and
The part of control area four constitute, the Schering bridge reverse wiring area of display include be made up of adjustable resistance the first bridge arm, by
The second bridge arm that noninductive fixed resistance and tunable capacitor are composed in parallel, composed in parallel by test item resistance and test item electric capacity
Three bridge arms, the four bridge legs being made up of standard capacitance, the first bridge arm, the second bridge arm, the 3rd bridge arm and four bridge legs are used as four articles
Branch road constitutes Schering bridge reverse wiring illustrative circuitry, and four bridge arms are set by light emitting diode assembling form respectively；The standard electric
Hold and be grounded with the public connecting end of noninductive fixed resistance and tunable capacitor in parallel；The back side of the demonstration board is provided with DSP cores
Piece, the Schering bridge reverse wiring area of display, regulation parameter viewing area, test result viewing area and control area with
Dsp chip is connected；The support includes two elevating levers and is arranged on the supporting plate of elevating lever bottom, the bottom of the supporting plate
It is provided with 4 universal wheels.
2. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the regulation ginseng
Number viewing areas include the adjustable resistance display screen and tunable capacitor display screen that set gradually, the adjustable resistance display screen and can
Electric capacity display screen is adjusted to be connected with dsp chip.
3. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the test knot
Display test result button, dielectric dissipation factor display screen and the test item capacitance that fruit viewing area includes setting gradually are shown
Screen；The display test result button, test item capacitance display screen and dielectric dissipation factor display screen with dsp chip phase
Even.
4. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the control zone
Domain includes the supply hub of spaced set, power switch and test item button successively；The supply hub, power switch and by
Test product button is connected with dsp chip.
5. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that first bridge
It is connected between the public connecting end of arm and the 3rd bridge arm and second bridge arm and the public connecting end of four bridge legs and exchanges inspection
Flowmeter.
6. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that first bridge
Can external power supply between arm and the public connecting end and the 3rd bridge arm and the public connecting end of four bridge legs of the second bridge arm.
7. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the adjustable electric
The top of resistance is provided with the first adjusting knob being connected with adjustable resistance, and first adjusting knob is connected with dsp chip.
8. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the adjustable electric
The top of appearance is provided with the second adjusting knob being connected with tunable capacitor, and second adjusting knob is connected with dsp chip.
9. a kind of Schering bridge reverse wiring presentation device of theory according to claim 1, it is characterised in that the support by
Rubber-plastics material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123719.3U CN206460704U (en) | 2017-02-10 | 2017-02-10 | A kind of Schering bridge reverse wiring presentation device of theory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123719.3U CN206460704U (en) | 2017-02-10 | 2017-02-10 | A kind of Schering bridge reverse wiring presentation device of theory |
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| Publication Number | Publication Date |
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| CN206460704U true CN206460704U (en) | 2017-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720123719.3U Expired - Fee Related CN206460704U (en) | 2017-02-10 | 2017-02-10 | A kind of Schering bridge reverse wiring presentation device of theory |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303607A (en) * | 2018-01-09 | 2018-07-20 | 广东电网有限责任公司电力科学研究院 | A kind of transformer combination operation capacitance matching detection method and system |
| CN111381106A (en) * | 2018-12-28 | 2020-07-07 | 上海国缆检测中心有限公司 | Cable testing circuit, method, terminal and medium based on penicillin bridge |
| CN111736018A (en) * | 2020-06-29 | 2020-10-02 | 广东电网有限责任公司 | Multi-channel dielectric loss measuring device and method |
-
2017
- 2017-02-10 CN CN201720123719.3U patent/CN206460704U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303607A (en) * | 2018-01-09 | 2018-07-20 | 广东电网有限责任公司电力科学研究院 | A kind of transformer combination operation capacitance matching detection method and system |
| CN108303607B (en) * | 2018-01-09 | 2020-07-03 | 广东电网有限责任公司电力科学研究院 | Transformer combination operation capacitance matching detection method and system |
| CN111381106A (en) * | 2018-12-28 | 2020-07-07 | 上海国缆检测中心有限公司 | Cable testing circuit, method, terminal and medium based on penicillin bridge |
| CN111736018A (en) * | 2020-06-29 | 2020-10-02 | 广东电网有限责任公司 | Multi-channel dielectric loss measuring device and method |
| CN111736018B (en) * | 2020-06-29 | 2022-05-13 | 广东电网有限责任公司 | Multi-channel dielectric loss measuring device and method |
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| GR01 | Patent grant | ||
| 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: 20170901 Termination date: 20180210 |