CN206178089U - Separable capacitive sensor device - Google Patents
Separable capacitive sensor device Download PDFInfo
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- CN206178089U CN206178089U CN201621232059.4U CN201621232059U CN206178089U CN 206178089 U CN206178089 U CN 206178089U CN 201621232059 U CN201621232059 U CN 201621232059U CN 206178089 U CN206178089 U CN 206178089U
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- sensor
- separable
- cable
- sensor device
- connecting line
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- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a separable capacitive sensor device, include: sensor module, transition joint, data connecting line, be connected through transition joint between sensor module and the data connecting line, sensor module is flexible equipment, can settle and treat that the detection streamer is outside, the arrangement mode for the mode compact winding in order to encircle in the cable outside of awaiting measuring. Sensor module regards as main magnetoconductivity material with the metal forming, can become the ring type by the compact winding on the cable.
Description
Technical field
This utility model is related to power system power cable shelf depreciation live detection field, more particularly to a kind of separable
Capacitive sensor device.
Background technology
Shelf depreciation always occurs in small range, and with the breakdown characteristics being exceedingly fast, this office put steep-sided pulse include from
Frequency content of the high frequency to hyperfrequency.By the sensor being installed on cable, Partial discharge signal is coupled, it is possible to effectively monitor
Cable insulation situation, and built-in electrical insulation defect is found in time.Because local discharge signal is faint, and equivalent frequency is high, because
And require that sensor has very high sensitivity and good frequency response characteristic.At present, as the use proportion of power cable increases
Plus, the increasing number of cable and lays that environment is various and complexity at the type of cable.Therefore, the form and arrangement of sensor
It is to pay close attention to object, and the space that its sensitivity and capacity of resisting disturbance are all also improved.
Being presently used for the sensor of Partial discharge signal collection has various, and such as built-in sensors, outer sensor, electromagnetic type are passed
Sensor, capacitance type sensor etc..Built-in sensors are arranged on inside cable, can obtain higher detection sensitivity, but to sensing
The reliability of device also has higher requirements, while having non-dismountable property, is substantially reduced using motility.For setting for having put into operation
Standby, great majority are fitted without built-in sensors, now then need to take outer sensor.Electromagnetic sensor generally adopts band
The broadband Luo-coil of FERRITE CORE, at the metallic shield earth lead of cable intermediate joint or terminal, by sense
The office that cable shield should be flow through puts pulse current and puts come the office of detection, due between high tension cable and measuring loop without direct
Electrical connection, so as to suppress noise well.But, the signal frequency of electromagnetic sensor collection is limited, and sensor
Heavier-weight, many inconvenience are brought in carrying and using on.Capacitance type sensor is come real by the Parameters variation in capacitor
Existing signal conversion, its dependable performance, sensitivity is high, and light and flexible is conducive to the measurement of shelf depreciation.
In order to be able to well adapt to the detection requirement of local discharge signal, and it is adapted to various cables, sensor should have
Compact, it is easy to mobile and the characteristics of arrange, and it should also have higher detection sensitivity simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of separable capacitive sensor device, and the capacitance type sensor will be passed
The metal forming of sensor module is wrapped on cable cover(ing), or wrapped in gas-insulating and fully-enclosed combined electrical apparatus (GIS) asphalt mixtures modified by epoxy resin
Into annular shape on fat flange, as an electrode of electric capacity, the protective metal shell of cable as electric capacity another electrode, using shape
Into electric capacity carry out the local discharge signal of coupling cable joint, data connecting line is connected simultaneously by transit joint with sensor assembly
Carry out signal transmission.The separable capacitance type sensor uses flexible material, and sensor can flexibly be deformed, therefore be easy to
Mobile and arrangement, and with higher detection sensitivity.
This utility model is using technical scheme：
A kind of separable capacitive sensor device, including：Sensor assembly, transit joint, data connecting line；Data
Connecting line；Connected by transit joint between the sensor assembly and data connecting line, the sensor assembly sets for flexibility
It is standby, Exterior cable to be detected can be placed in, setting is to wind around in an orbiting manner outside cable under test；
Wherein, the sensor assembly is used for induction cable local discharge signal；The transit joint is used to connect described
Sensor assembly and the data connecting line；The data connecting line is used for transmission signal.
Further, the sensor assembly material therefor is metal forming, belongs to flexible material, it is easy to deform.
Further, the sensor assembly is arranged in outside cable body to be detected or its cable accessory, or gas is exhausted
On edge fully closed combined electric unit (GIS) epoxy resin flange, arrangement forms annular shape for compact winding.
Further, the sensor assembly is capacitance type sensor, can detect 1.5GHz signals below.
Further, the sensor assembly can be separated with the data connecting line, described when needing to carry out data transmission
Sensor assembly can be connected with the data connecting line by transit joint.
Further, the transit joint is made up of joint shell and BNC connector, joint shell inside ensuring data wire with electricity
Hold the connection angle between sensor more than 135 ° to reduce high frequency signal attenuation, BNC connector one end and the data connecting line
Connection.
Further, the data connecting line is radio frequency coaxial-cable.
Separable capacitance type sensor described in the utility model has following advantages：
(1) traditional sensors normally shape is fixed, and volume is larger with weight, described in the utility model outer using inconvenience
The formula sensor of putting adopts flexible material, and light weight, small volume, shape is variable, can surround cable, can be applicable to different cables and
In small space；And transit joint can be separated with data wire, therefore there is compact, be easy to mobile and arrangement；
(2) external sensor described in the utility model is capacitance type sensor, and detectable bandwidth reaches 1.5GHz, right
High-frequency signal capture ability is strong, therefore described external sensor has higher detection sensitivity, plays a game so as to ensure that
The effective detection of portion's electric discharge；
(3) external sensor described in the utility model in transit joint interior optimization data wire and capacitance sensor
Between connection angle, reduce high frequency signal attenuation, therefore have the advantages that decay is little, transmission high bandwidth, it is ensured that signal
Effective transmission.
Description of the drawings
Fig. 1 is the structural representation of separable capacitance type sensor described in the utility model.
Fig. 2 is the use state under a kind of embodiment of separable capacitance type sensor described in the utility model
Figure.
Fig. 3 is the Cleaning Principle equivalent circuit diagram of separable capacitance type sensor described in the utility model.
Specific embodiment
This utility model is elaborated below in conjunction with the accompanying drawings.
Accompanying drawing 1 shows the structural representation of described separable capacitance type sensor.As shown in Figure 1, it is described
Separable capacitance type sensor includes sensor assembly 1, transit joint 2, data connecting line 3, and the sensor assembly can be around
Be wrapped on cable or gas-insulating and fully-enclosed combined electrical apparatus (GIS) on form circular；The transit joint, by including shell and
BNC connector, when using, BNC connector can connect data connecting line carries out signal transmission.
Accompanying drawing 2 is this utility model use state figure.Accompanying drawing 2 illustrates one section of cable 4, and sensor assembly 1 is surrounded on cable 4
The outside of oversheath 5, is close to cable surface, and, used as an electrode of electric capacity, the protective metal shell 6 of cable is used as electricity for sensor assembly 1
Another electrode for holding, using the electric capacity for being formed come the local discharge signal inside coupling cable.Therefore, the transducer arrangements side
Flexibly, operation normal to cable has no effect formula, is easy to mobile and dismounting.Cable also include outer semiconducting layer 7, insulating barrier 8,
Conductor thread core 9, interior semiconductive layer 10.
Accompanying drawing 3 is this utility model test using capacitance sensor principle equivalent circuit diagram.As shown in Figure 3, C is condenser type
The coupled capacitor of sensor, its value is relevant with two factors, and one is that unit between cable metal sheath 6 and oversheath 5 is long
The electric capacity C of degree0, one be sensor assembly 1 width L；Rs is the impedance between capacitance sensor and protective metal shell 6；RLIt is to survey
The input impedance in amount loop.Cs is the stray capacitance between capacitance sensor and sheath：
Wherein：DiFor the external diameter of external sheath layer 5；DcFor the external diameter of metal sheath layer 6；ετFor the relative dielectric constant of restrictive coating；ε0
For permittivity of vacuum.
The electric capacity of capacitance type sensor is mainly C and Cs, material, processing technology and electrode width by cable itself and
Away from impact.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure made using this utility model description and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in
Other related technical fields, are included in the same manner in scope of patent protection of the present utility model.
Claims (7)
1. a kind of separable capacitive sensor device, it is characterised in that include：Sensor assembly, transit joint, data connect
Wiring；Connected by transit joint between the sensor assembly and data connecting line, the sensor assembly is flexible apparatus,
Exterior cable to be detected can be placed in, setting is to wind around in an orbiting manner outside cable under test.
2. a kind of separable capacitive sensor device according to claim 1, it is characterised in that：The sensor die
Block can be separated with the data connecting line, when needing to carry out data transmission, the sensor assembly and the data connecting line
Can be connected by transit joint.
3. a kind of separable capacitive sensor device according to claim 1, it is characterised in that the sensor die
When block is placed on cable under test, as an electrode detection cable local discharge signal of electric capacity.
4. a kind of separable capacitive sensor device according to claim 1, it is characterised in that the sensor die
Block is capacitance type sensor, and the sensor assembly material therefor is metal forming.
5. a kind of separable capacitive sensor device according to claim 1, it is characterised in that the transit joint
Including joint shell and BNC connector, the connection angle between data wire and capacitance type sensor inside joint shell is more than
135 °, BNC connector one end is connected with the data connecting line.
6. a kind of separable capacitive sensor device according to claim 1, it is characterised in that the data cube computation
Line is radio frequency coaxial-cable.
7. a kind of separable capacitive sensor device according to claim 1, it is characterised in that the sensor die
Block material therefor is metal forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621232059.4U CN206178089U (en) | 2016-11-18 | 2016-11-18 | Separable capacitive sensor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621232059.4U CN206178089U (en) | 2016-11-18 | 2016-11-18 | Separable capacitive sensor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206178089U true CN206178089U (en) | 2017-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621232059.4U Active CN206178089U (en) | 2016-11-18 | 2016-11-18 | Separable capacitive sensor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206178089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618351A (en) * | 2019-09-27 | 2019-12-27 | 湖南大学 | Capacitance sensor and detection device |
-
2016
- 2016-11-18 CN CN201621232059.4U patent/CN206178089U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618351A (en) * | 2019-09-27 | 2019-12-27 | 湖南大学 | Capacitance sensor and detection device |
| CN110618351B (en) * | 2019-09-27 | 2021-11-16 | 湖南大学 | Capacitance sensor and detection device |
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