CN207541206U - Transient state based on capacitive coupling principle ground radio wave sensor - Google Patents
Transient state based on capacitive coupling principle ground radio wave sensor Download PDFInfo
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- CN207541206U CN207541206U CN201721762307.0U CN201721762307U CN207541206U CN 207541206 U CN207541206 U CN 207541206U CN 201721762307 U CN201721762307 U CN 201721762307U CN 207541206 U CN207541206 U CN 207541206U
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- derided capacitors
- transient state
- radio wave
- capacitive coupling
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Abstract
The utility model discloses the transient state based on capacitive coupling principle radio wave sensor, shield shell, BNC connector, dielectric, level-one derided capacitors, two level derided capacitors, build-out resistor, signal cable, the level-one derided capacitors are arranged on shielding enclosure bottom surface, the dielectric is arranged between level-one derided capacitors and shielding enclosure bottom, the level-one derided capacitors are connect by conducting wire with one end of two level derided capacitors, the other end of the two level derided capacitors is connected by the input terminal of signal cable and BNC connector, one end of the two level derided capacitors is connect with one end of the build-out resistor, the other end of the two level derided capacitors and the other end of build-out resistor connect.The adjustment of the size of level-one derided capacitors and two level derided capacitors is more convenient, by adjusting the size of two level derided capacitors value, to reach best sensitivity, ideal resonant frequency point and bandwidth.
Description
Technical field
The utility model is related to transient state radio wave sensor, and in particular to the transient state based on capacitive coupling principle electric wave pass
Sensor.
Background technology
Partial discharge phenomenon generally refers to high voltage electric equipment.Electric Power Equipment Insulation is under sufficiently strong electric field action
The electric discharge occurred in subrange.It is this electric discharge using only cause the insulation part short circuit between conductor without formed conductive channel as
Limit.Shelf depreciation can all have dielectric some influences, influence of the slight shelf depreciation to Electric Power Equipment Insulation each time
Smaller, the decline of dielectric strength is slower；And strong shelf depreciation, then dielectric strength can be made to decline quickly.This is to make high-voltage electricity
One key factor of the apparatus insulated damage of power.Therefore, when design high-tension electricity is apparatus insulated, to consider in long-term work voltage
Under the action of, do not allow stronger shelf depreciation occurs in insulation system.Running equipment will be strengthened monitoring, work as part
, should be out of service by equipment when being discharged beyond to a certain degree, it is overhauled or is replaced.
Shelf depreciation can generate electromagnetic wave signal, can be generated when the metal shell of the signal transmission to high voltage alive equipment
The voltage-to-ground signal of one transient state, the signal are named as ground electric wave signal ((transient earth voltage, TEV
Wave), which can be coupled by dedicated capacitance sensor, live detection of the method particularly suitable for Medium Voltage Switchgear.
In the prior art, there is common transient state ground radio wave sensor currently on the market, generally existing poor sensitivity, resonance
The problem of Frequency point is relatively low.
Utility model content
The utility model with solving transient state common currently on the market of the existing technology radio wave sensor, is generally deposited
Poor sensitivity, resonant frequency point is relatively low the problem of, the transient state based on capacitive coupling principle is provided radio wave sensor, application
When by adjusting level-one derided capacitors value, two level derided capacitors value and build-out resistor value size, ensure transient state electric wave sensing
Device reaches best sensitivity, ideal resonant frequency point and bandwidth.
The utility model is achieved through the following technical solutions：
Transient state based on capacitive coupling principle ground radio wave sensor, shielding shell, BNC connector, dielectric, level-one partial pressure
Capacitance, two level derided capacitors, build-out resistor, signal cable, the level-one derided capacitors are arranged on shielding enclosure bottom surface,
The dielectric is arranged between level-one derided capacitors and shielding enclosure bottom, and the level-one derided capacitors pass through conducting wire and two
One end connection of grade derided capacitors, the other end of the two level derided capacitors are connected by the input terminal of signal cable and BNC connector
Connect, one end of the two level derided capacitors is connect with one end of the build-out resistor, the other end of the two level derided capacitors with
The other end connection of build-out resistor.The utility model dielectric is arranged between shell and level-one derided capacitors, avoids shielding
Shell influences the capacitance of level-one derided capacitors.By adjusting the size for the level-one derided capacitors for being arranged on shell inner bottom surface, reach
To optimal coupling electric wave signal.Pole plate is connect by conducting wire with one end of two level derided capacitors, is divided by adjusting two level
The size of capacitance carries out signal output to obtain ground electric wave signal by conducting wire, and build-out resistor is in parallel with two level derided capacitors,
High-frequency signal is inhibited by the size for adjusting build-out resistor.The other end of two level derided capacitors by signal cable and BNC connector,
Convenient for passing through BNC connector joint connection in site.The adjustment of the size of level-one derided capacitors and two level derided capacitors is more convenient, by adjusting
The size of two level derided capacitors value, to reach best sensitivity, ideal resonant frequency point and bandwidth.
Further, transient state based on capacitive coupling principle ground radio wave sensor, the level-one derided capacitors are pole plate, pole
Plate spacing is 2mm, a diameter of 25mm of the pole plate.As a kind of preferred embodiment, pole plate spacing is 2mm, the diameter of pole plate
It is ideal level-one derided capacitors value in order to obtain for 25mm.
Further, transient state based on capacitive coupling principle ground radio wave sensor, the length of the signal cable is 6cm.
As a kind of preferred embodiment, signal cable length is 6cm convenient in high frequency by resonant frequency control in optimal value.
Further, transient state based on capacitive coupling principle ground radio wave sensor, the resistance value of the build-out resistor is 50
Ohm.As a kind of preferred embodiment, the resistance value of build-out resistor is in order to by high-frequency signal electric wave signal over the ground for 50 ohm
Influence is reduced to minimum.
Further, transient state based on capacitive coupling principle ground radio wave sensor, the capacitance of the two level derided capacitors
For 25pf.As a kind of more preferable mode, avoid improving resonant frequency as far as possible on the basis of by stray capacitance influences
Point.
The utility model compared with prior art, has the following advantages and advantages：
1st, transient state of the utility model based on capacitive coupling principle ground radio wave sensor, level-one derided capacitors and two level partial pressure
The size adjustment of capacitance is more convenient, by adjusting the size of two level derided capacitors value, to reach best sensitivity, ideal
Resonant frequency point and bandwidth.
2nd, transient state of the utility model based on capacitive coupling principle ground radio wave sensor, as a kind of preferred embodiment, pole plate
Spacing is 2mm, and a diameter of 25mm of pole plate is ideal level-one derided capacitors value in order to obtain.
3rd, transient state of the utility model based on capacitive coupling principle radio wave sensor, the capacitance of two level derided capacitors be
25pf as a kind of more preferable mode, avoids improving resonant frequency point as far as possible on the basis of by stray capacitance influences.
Description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part does not form the restriction to the utility model embodiment.In the accompanying drawings：
FIG. 1 is a schematic structural view of the utility model.
Label and corresponding parts title in attached drawing：
1- shieldings shell, 2-BNC connectors, 3- dielectrics, 4- level-ones derided capacitors, 5- two levels derided capacitors, 6- matchings
Resistance, 7- signal cables.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment
As shown in Figure 1, the ground of the transient state based on capacitive coupling principle radio wave sensor, shielding shell 1, BNC connector 2, insulation
Medium 3, level-one derided capacitors 4, two level derided capacitors 5, build-out resistor 6, signal cable 7, the level-one derided capacitors 4 are pole
Plate, pole plate spacing are 2mm, a diameter of 25mm of the pole plate, and the level-one derided capacitors 4, which are arranged on, to be shielded inside shell 1
On bottom surface, the dielectric 3 is arranged between 1 bottom surface of level-one derided capacitors 4 and shielding shell, the two level derided capacitors 5
Capacitance for 25pf, the level-one derided capacitors 4 are connect by conducting wire with one end of two level derided capacitors 5, two fraction
The other end of voltage capacitance 5 is connect by signal cable 7 with the input terminal of BNC connector 2, and the length of the signal cable 7 is 6cm,
One end of the two level derided capacitors 5 is connect with one end of the build-out resistor 6, the other end of the two level derided capacitors 5 with
The other end connection of build-out resistor 6, the resistance value of the build-out resistor 6 is 50 ohm.The dielectric 3 of the utility model uses
Glass is made, and dielectric 3 is arranged between shell and level-one derided capacitors 4, and shielding shell 1 is avoided to influence level-one derided capacitors
4 capacitance.Level-one derided capacitors use pole plate, and pole plate spacing is 2mm, a diameter of 25mm.By adjusting pole plate area and
Spacing come adjust be arranged on shielding 1 inner bottom surface of shell level-one derided capacitors 4 size, the coupling being optimal electric wave letter
Number.Pole plate is connect by conducting wire with one end of two level derided capacitors 5, obtains ground by adjusting the size of two level derided capacitors value
Electric wave signal carries out signal output by conducting wire, and two level derided capacitors value is 25pf.Build-out resistor 6 is 50 ohm, build-out resistor 6
It is in parallel with two level derided capacitors 5, high-frequency signal is inhibited by the size for adjusting build-out resistor 6.The length of signal cable 7 is 6cm,
The other end of two level derided capacitors 5 is by signal cable 7 and BNC connector 2, convenient for passing through 2 joint connection in site of BNC connector.One fraction
Voltage capacitance 4 and the adjustment of the size of two level derided capacitors 5 are more convenient, by adjusting the size of two level derided capacitors value, to reach
Best sensitivity, ideal resonant frequency point and bandwidth.
Above-described specific embodiment, the purpose of this utility model, technical solution and advantageous effect have been carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (5)
1. the ground of the transient state based on capacitive coupling principle radio wave sensor, which is characterized in that shielding shell (1), BNC connector (2), absolutely
Edge medium (3), level-one derided capacitors (4), two level derided capacitors (5), build-out resistor (6), signal cable (7), a fraction
Voltage capacitance (4) is arranged in shielding shell (1) inner bottom surface, and the dielectric (3) is arranged on level-one derided capacitors (4) and screen
Between covering shell (1) bottom surface, the level-one derided capacitors (4) are connect by conducting wire with one end of two level derided capacitors (5), described
The other end of two level derided capacitors (5) is connect by signal cable (7) with the input terminal of BNC connector (2), the two level partial pressure electricity
The one end for holding (5) is connect with one end of the build-out resistor (6), the other end and build-out resistor of the two level derided capacitors (5)
(6) other end connection.
2. the transient state according to claim 1 based on capacitive coupling principle ground radio wave sensor, which is characterized in that described one
Grade derided capacitors (4) are pole plate, and pole plate spacing is 2mm, a diameter of 25mm of the pole plate.
3. the transient state according to claim 1 based on capacitive coupling principle ground radio wave sensor, which is characterized in that the letter
The length of number cable (7) is 6cm.
4. the transient state according to claim 1 based on capacitive coupling principle ground radio wave sensor, which is characterized in that described
Resistance value with resistance (6) is 50 ohm.
5. the transient state according to claim 1 based on capacitive coupling principle ground radio wave sensor, which is characterized in that described two
The capacitance of grade derided capacitors (5) is 25pf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762307.0U CN207541206U (en) | 2017-12-15 | 2017-12-15 | Transient state based on capacitive coupling principle ground radio wave sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762307.0U CN207541206U (en) | 2017-12-15 | 2017-12-15 | Transient state based on capacitive coupling principle ground radio wave sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207541206U true CN207541206U (en) | 2018-06-26 |
Family
ID=62618717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721762307.0U Active CN207541206U (en) | 2017-12-15 | 2017-12-15 | Transient state based on capacitive coupling principle ground radio wave sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207541206U (en) |
-
2017
- 2017-12-15 CN CN201721762307.0U patent/CN207541206U/en active Active
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