CN109164344A - A kind of power cable earth detector, preparation method and electrical leakage detecting method - Google Patents
A kind of power cable earth detector, preparation method and electrical leakage detecting method Download PDFInfo
- Publication number
- CN109164344A CN109164344A CN201811118131.4A CN201811118131A CN109164344A CN 109164344 A CN109164344 A CN 109164344A CN 201811118131 A CN201811118131 A CN 201811118131A CN 109164344 A CN109164344 A CN 109164344A
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- power cable
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- 238000000034 method Methods 0.000 title claims description 20
- 238000002360 preparation method Methods 0.000 title description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 59
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 229920000260 silastic Polymers 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 9
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 8
- 229910000846 In alloy Inorganic materials 0.000 claims description 8
- 229910052733 gallium Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- MPZNMEBSWMRGFG-UHFFFAOYSA-N bismuth indium Chemical compound [In].[Bi] MPZNMEBSWMRGFG-UHFFFAOYSA-N 0.000 claims description 7
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 229920005573 silicon-containing polymer Polymers 0.000 claims description 7
- 230000010412 perfusion Effects 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- YTCQFLFGFXZUSN-BAQGIRSFSA-N microline Chemical compound OC12OC3(C)COC2(O)C(C(/Cl)=C/C)=CC(=O)C21C3C2 YTCQFLFGFXZUSN-BAQGIRSFSA-N 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000010147 laser engraving Methods 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 230000000875 corresponding effect Effects 0.000 description 6
- 230000008676 import Effects 0.000 description 4
- 230000037452 priming Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention provides one kind to be used for power cable earth detector, is set near tested cable, comprising: liquid metal micro-coil, conducting wire and voltage measuring apparatus；Liquid metal micro-coil is connected by conducting wire with voltage measuring apparatus.A kind of device for power cable detection of electrical leakage provided by the invention can it is online, in real time, fixed point detection power cable leakage current situation, can measure faint electric leakage, and solve the problems, such as to be unable to measure faint leakage point of electricity.
Description
Technical field
The present invention relates to field of power systems, and in particular to a kind of power cable earth detector, preparation method and leakage
Electric detection method.
Background technique
Cable is the most widely used a kind of equipment in electric system, the power transmission and distribution for various voltage class.
In the power system, in all kinds of electrical equipment malfunctions or accident, cable accounts for more than half, and is caused by leakage current
Cable fault or accident account for 90% or more.Cable leakage will lead to the end that powers in electric system and raise voltage, influence electrical
Equipment normal use increases power supply energy loss.Contactless capacitor, inductance, Current Mutual Inductance detection method are presently the most
The technology conveniently, safely operated has obtained paying close attention in the industry, but majority does induction coil using solid deposition film electrode, and
Measurement accuracy is relatively low, in small space or high-density arrangement cable machinery detection can not have been adapted to, in addition to faint electric leakage
Point is unable to measure.
Therefore, advanced detection of electrical leakage technology and device are developed, detection of electrical leakage, in advance precautionary measures is carried out to power cable
It is very necessary and urgent.
Summary of the invention
In order to solve the above-mentioned deficiency in the presence of the prior art, the present invention provides a kind of for power cable detection of electrical leakage
Device.
Present invention provide the technical scheme that
One kind being used for power cable earth detector, is set near tested cable, comprising:
Liquid metal micro-coil, conducting wire and voltage measuring apparatus；
Liquid metal micro-coil is connected by conducting wire with voltage measuring apparatus.
Preferably, the quantity of the liquid metal micro-coil is one or more, when the liquid metal micro-coil quantity
When being multiple, after the connection type of the multiple liquid metal micro-coil includes: serial or parallel connection or connects after in parallel or parallel connection
Series connection.
Preferably, the liquid metal micro-coil includes micro-coil runner and liquid metal；
Preferably, the micro-coil runner is using flexible high voltage bearing silastic material；
The liquid metal uses metal alloy of the fusing point within the scope of 10~60 DEG C.
The preferred liquid metal micro-coil, comprising:
Spiral line type and straight channel bend square.
The preferred high voltage bearing silastic material of flexibility is dimethyl silicone polymer.
Preferably, the liquid metal, comprising:
Gallium or gallium-indium alloy or gallium-indium-tin alloy or gallium indium red brass or bismuth or bismuth indium alloy or bismuth indium stannum alloy.
Preferably, the production method of the liquid metal coil, comprising:
Micro-coil runner mold is produced using MEMS micro-processing method；
Liquid silastic is cast on the micro-coil runner mold, is peeled from mold after solidification；
Micro-coil runner is sealed using MEMS package technique；
Liquid metal forms complete micro-coil full of micro-coil runner by injection system perfusion.
Preferably, the high voltage bearing silastic material of flexibility is dimethyl silicone polymer.
Preferably, the MEMS micro-processing method, comprising:
Soft lithograph and laser engraving.
Preferably, the MEMS package technique is plasma bonding.
A kind of power cable electrical leakage detecting method, comprising:
Based on power cable earth detector:
By state metal micro-line circle parallel and near to tested cable, and the spacing set is kept with the tested cable, along described
Cable direction moves in parallel micro-coil by the spacing；
In moving process, if the voltage that the voltage check device in the power cable earth detector detects
When value is higher than predetermined maximum voltage value, shows that the cable position leakage current is more than maximum leakage current value, need to repair.
Preferably, further includes:
Permitted maximum leakage current value is worked normally according to cable, to the sensor of power cable earth detector
It is calibrated, corresponding maximum voltage value under the conditions of setting maximum leakage current on voltage measuring apparatus.
A kind of power cable current leakage detection system, comprising:
Calibration module is used to work normally permitted maximum leakage current value according to cable, calibrates to sensor,
Corresponding maximum voltage value under the conditions of setting maximum leakage current on voltage measuring apparatus；
Induction module is more than maximum leakage current value for the induction cable position leakage current；
Display module is used to show that measurement voltage value is higher than predetermined maximum voltage value in cable a part voltage measuring apparatus.
Compared with prior art, the invention has the benefit that
1, the present invention provides one kind to be used for power cable earth detector, is set near tested cable, comprising: liquid
State metal micro-line circle, conducting wire and voltage measuring apparatus；Liquid metal micro-coil is connected by conducting wire with voltage measuring apparatus.This hair
A kind of device for power cable detection of electrical leakage of bright offer can online, real-time, fixed point detection power cable leakage current feelings
Condition can measure faint electric leakage, overcome the difficulty of in small space and high-density arrangement cable machinery detection, and solve
Problem that faint leakage point of electricity is unable to measure.
2, a kind of device for power cable detection of electrical leakage provided by the invention can be in electric system without having a power failure
Detection can be achieved, and sensor production is simple, low in cost, flexible deformable, high reliablity, strong antijamming capability, sensitive
Degree is high.
3, a kind of device for power cable detection of electrical leakage provided by the invention is using liquid flexible micro-coil to cable
Short distance detection is carried out, so as to which external interference to be preferably minimized.
Detailed description of the invention
Fig. 1, which is that the present invention is a kind of, is used for power cable earth detector schematic diagram；
Fig. 2 is that form is connected in series in a kind of liquid metal micro-coil for power cable earth detector of the present invention；
Fig. 3 is that a kind of liquid metal micro-coil for power cable earth detector of the present invention is connected in parallel form；
Fig. 4 be after a kind of liquid metal micro-coil runner series connection for power cable earth detector of the present invention again simultaneously
Connection；
1 be liquid metal micro-coil, 21 be end perfusion import, 22 be priming outlet, 3 be insertion conducting wire, 4 be measurement dress
It sets.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
Embodiment one:
One kind being used for power cable earth detector, is set near tested cable, comprising:
Liquid metal micro-coil, conducting wire and voltage measuring apparatus；
Liquid metal micro-coil is connected by conducting wire with voltage measuring apparatus.
The quantity of the liquid metal micro-coil is one or more, when the liquid metal micro-coil quantity is multiple
When, the connection type of the multiple liquid metal micro-coil includes: parallel connection after series, parallel or series connection.
The liquid metal micro-coil includes micro-coil runner and liquid metal；
The micro-coil runner is using flexible high voltage bearing silastic material；
The liquid metal uses metal alloy of the fusing point within the scope of 10~60 DEG C.
The liquid metal micro-coil, comprising:
Spiral line type and straight channel bend square.
The high voltage bearing silastic material of flexibility is dimethyl silicone polymer.
The liquid metal, comprising: gallium, gallium-indium alloy, gallium-indium-tin alloy, gallium indium red brass, bismuth, bismuth indium alloy or bismuth
Indium stannum alloy.
Embodiment two
The production method of liquid metal coil, comprising:
Micro-coil runner mold is produced using MEMS micro-processing method；
Liquid silastic is cast on the micro-coil runner mold, is peeled from mold after solidification；
Micro-coil runner is sealed using MEMS package technique；
Liquid metal forms complete micro-coil full of micro-coil runner by injection system perfusion.
The high voltage bearing silastic material of flexibility is dimethyl silicone polymer.
The MEMS micro-processing method, comprising:
Soft lithograph and laser engraving.
The MEMS package technique is plasma bonding.
Embodiment three
A kind of power cable electrical leakage detecting method, comprising:
By state metal micro-line circle parallel and near to tested cable, and the spacing set is kept with the tested cable, along described
Cable direction moves in parallel micro-coil by the spacing；
In moving process, if the voltage that the voltage check device in the power cable earth detector detects
When value is higher than predetermined maximum voltage value, shows that the cable position leakage current is more than maximum leakage current value, need to repair.
Permitted maximum leakage current value is worked normally according to cable, to the sensor of power cable earth detector
It is calibrated, corresponding maximum voltage value under the conditions of setting maximum leakage current on voltage measuring apparatus.
Example IV
A kind of power cable current leakage detection system, comprising:
Calibration module is used to work normally permitted maximum leakage current value according to cable, calibrates to sensor,
Corresponding maximum voltage value under the conditions of setting maximum leakage current on voltage measuring apparatus；
Induction module is more than maximum leakage current value for the induction cable position leakage current；
Display module is used to show that measurement voltage value is higher than predetermined maximum voltage value in cable a part voltage measuring apparatus.
Embodiment five:
The present invention takes following technical scheme: it is a kind of based on liquid metal micro-coil for power cable detection of electrical leakage
Flexible sensor.Flexible sensor is by one or M × N (M, N are more than or equal to 2 integer) a liquid metal micro-coil array string
Parallel connection is constituted, and voltage measuring apparatus is accessed at coil the two poles of the earth.The alternating magnetic field meeting that cable leakage point alternating current generates in its vicinity
Induced current is generated in liquid metal micro-coil, voltage measuring apparatus is just capable of measuring electric leakage inducement voltage at this time.Work as liquid
It when metal micro-line coil sensor is close to cable, is moved in parallel along cable direction, if being measured in cable a part voltage measuring apparatus
When voltage value out exceeds setting value, show that cable exceeds the leakage current of corresponding voltage setting value in the position leakage current
Value, and then determine cable leakage position and degree.
Liquid metal micro-coil is made using MEMS micro-processing method, external by flexible high voltage bearing silastic material
(such as dimethyl silicone polymer) encapsulation.The specific manufacturing process of coil fluid channel: MEMS micro-processing method (such as soft quarter is used first
Erosion, laser engraving etc.) produce micro-coil runner mold；Then liquid silastic is cast on micro-coil runner mold, Gu
It is peeled from mold after change；Finally micro-coil runner is sealed using MEMS package technique (such as plasma bonding).Liquid
Metal forms complete micro-coil, the access of liquid metal perfusing hole extraction wire full of micro-coil runner by injection system perfusion
Voltage measuring apparatus.Gallium, gallium-indium alloy, gallium-indium-tin alloy, gallium indium red brass, bismuth, bismuth indium alloy, bismuth can be selected in liquid metal
Metal alloy of the indium stannum alloy fusing point within the scope of 10~60 DEG C.
Embodiment six:
Flexible sensor detection schematic diagram as shown in Figure 1.Import 21 and priming outlet is perfused in 1 end of liquid metal micro-coil
22 insertion conducting wires 3, junction is encapsulated by silicon rubber and is fixed.Import 21 and priming outlet 22 is perfused in 1 end of liquid metal micro-coil
Measuring device 4, examinations function are accessed through conducting wire 3.Liquid metal is injected from perfusion import 21, after being full of runner, liquid
Metal will be flowed out from priming outlet 22.It is that form, several micro-coil runners are connected in series in liquid metal micro-coil as shown in Figure 2
It joins end to end to be formed；It is that liquid metal micro-coil is connected in parallel form as shown in Figure 3, several micro-coil runner parallel connections are formed.
It is, of course, also possible to improve measurement in parallel again as shown in figure 4, to increase the measured value that leaks electricity after the series connection of several micro-coil runners
Precision.
It senses implement body detection method and process is as follows: permitted maximum leakage current being worked normally according to cable first
Value, calibrates sensor, and corresponding maximum voltage value under the conditions of setting maximum leakage current on voltage measuring apparatus；
Micro-coil is then kept into the position for being not more than 5mm spacing parallel and near to and with cable；It is finally moved in parallel along cable direction micro-
Coil, when cable a part voltage measuring apparatus shows that measurement voltage value is higher than predetermined maximum voltage value and warning note,
Show that the cable position leakage current is more than maximum leakage current value, needs to repair.Cable leakage size of current and voltage
Measuring device measurement voltage value is directly positively correlated, and can be worth by measurement voltage.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (13)
1. one kind is used for power cable earth detector, it is set near tested cable characterized by comprising
Liquid metal micro-coil, conducting wire and voltage measuring apparatus；
Liquid metal micro-coil is connected by conducting wire with voltage measuring apparatus.
2. being used for power cable earth detector as described in claim 1, which is characterized in that the liquid metal micro-coil
Quantity be one or more, when the liquid metal micro-coil quantity be it is multiple when, the multiple liquid metal micro-coil
It connects again after in parallel or parallel connection after connection type includes: serial or parallel connection or connects.
3. as described in claim 1 a kind of for power cable earth detector, which is characterized in that the liquid metal is micro-
Coil includes micro-coil runner and liquid metal；
The micro-coil runner is using flexible high voltage bearing silastic material；
The liquid metal uses metal alloy of the fusing point within the scope of 10~60 DEG C.
4. as described in claim 1 a kind of for power cable earth detector, which is characterized in that the liquid metal is micro-
Coil, comprising:
Spiral line type and straight channel bend square.
5. as claimed in claim 3 a kind of for power cable earth detector, which is characterized in that the flexibility is high pressure resistant
Silastic material be dimethyl silicone polymer.
6. as claimed in claim 3 a kind of for power cable earth detector, which is characterized in that the liquid metal,
Include:
Gallium or gallium-indium alloy or gallium-indium-tin alloy or gallium indium red brass or bismuth or bismuth indium alloy or bismuth indium stannum alloy.
7. the production method of liquid metal coil as claimed in any one of claims 1 to 6 characterized by comprising
Micro-coil runner mold is produced using MEMS micro-processing method；
Liquid silastic is cast on the micro-coil runner mold, is peeled from mold after solidification；
Micro-coil runner is sealed using MEMS package technique；
Liquid metal forms complete micro-coil full of micro-coil runner by injection system perfusion.
8. a kind of production method of liquid metal micro-coil as claimed in claim 7, which is characterized in that the flexibility is high pressure resistant
Silastic material be dimethyl silicone polymer.
9. a kind of production method of liquid metal micro-coil as claimed in claim 7, which is characterized in that the MEMS micro Process
Method, comprising:
Soft lithograph and laser engraving.
10. a kind of production method of liquid metal micro-coil as claimed in claim 7, which is characterized in that the MEMS package
Technique is plasma bonding.
11. a kind of power cable electrical leakage detecting method characterized by comprising
Based on power cable earth detector as claimed in any one of claims 1 to 6:
By state metal micro-line circle parallel and near to tested cable, and the spacing set is kept with the tested cable, along the cable
Direction moves in parallel micro-coil by the spacing；
In moving process, if the voltage value that the voltage check device in the power cable earth detector detects is high
When predetermined maximum voltage value, shows that the cable position leakage current is more than maximum leakage current value, need to repair.
12. a kind of power cable electrical leakage detecting method as claimed in claim 11, which is characterized in that further include:
Permitted maximum leakage current value is worked normally according to cable, to electric power electricity as claimed in any one of claims 1 to 6
The sensor of cable earth detector is calibrated, under the conditions of setting maximum leakage current on voltage measuring apparatus it is corresponding most
Big voltage value.
13. a kind of power cable current leakage detection system characterized by comprising
Calibration module is used to work normally permitted maximum leakage current value according to cable, calibrates to sensor, in electricity
Corresponding maximum voltage value under the conditions of the maximum leakage current of setting on pressure measuring device；
Induction module is more than maximum leakage current value for the induction cable position leakage current；
Display module is used to show that measurement voltage value is higher than predetermined maximum voltage value in cable a part voltage measuring apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118131.4A CN109164344A (en) | 2018-09-25 | 2018-09-25 | A kind of power cable earth detector, preparation method and electrical leakage detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118131.4A CN109164344A (en) | 2018-09-25 | 2018-09-25 | A kind of power cable earth detector, preparation method and electrical leakage detecting method |
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| Publication Number | Publication Date |
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| CN109164344A true CN109164344A (en) | 2019-01-08 |
Family
ID=64880415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811118131.4A Pending CN109164344A (en) | 2018-09-25 | 2018-09-25 | A kind of power cable earth detector, preparation method and electrical leakage detecting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115524639A (en) * | 2022-10-31 | 2022-12-27 | 硕能(上海)自动化科技有限公司 | Hollow coil cable fault detection system based on MEMS sensor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614976U (en) * | 1992-07-22 | 1994-02-25 | 株式会社ゼクセル | Leakage detector |
| JPH11111552A (en) * | 1997-10-01 | 1999-04-23 | Ind Technol Res Inst | Manufacture of thin film type detection microcoil and equipment |
| JP2006242725A (en) * | 2005-03-03 | 2006-09-14 | Chuzaburo Ichiyoshi | Leakage current detector and continuous monitoring system |
| CN101650412A (en) * | 2009-08-28 | 2010-02-17 | 中国科学院电工研究所 | Nuclear magnetic resonance radio-frequency micro-coil and manufacturing method thereof |
| US20130187635A1 (en) * | 2012-01-19 | 2013-07-25 | Industrial Technology Research Institute | Electrical sensor for a two-wire power cable |
| CN105479463A (en) * | 2016-01-26 | 2016-04-13 | 清华大学 | Deformable and flexible robot based on liquid metal electromagnetic actuation |
| CN106876087A (en) * | 2017-03-17 | 2017-06-20 | 云南靖创液态金属热控技术研发有限公司 | A kind of close-coupled high-intensity magnetic field generating means |
| CN107887100A (en) * | 2017-10-31 | 2018-04-06 | 深圳大学 | A kind of flexible liquid metal inductance coil and preparation method and application |
| CN108417363A (en) * | 2018-02-10 | 2018-08-17 | 深圳大学 | A kind of liquid metal Wireless charging coil and preparation method thereof |
-
2018
- 2018-09-25 CN CN201811118131.4A patent/CN109164344A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614976U (en) * | 1992-07-22 | 1994-02-25 | 株式会社ゼクセル | Leakage detector |
| JPH11111552A (en) * | 1997-10-01 | 1999-04-23 | Ind Technol Res Inst | Manufacture of thin film type detection microcoil and equipment |
| JP2006242725A (en) * | 2005-03-03 | 2006-09-14 | Chuzaburo Ichiyoshi | Leakage current detector and continuous monitoring system |
| CN101650412A (en) * | 2009-08-28 | 2010-02-17 | 中国科学院电工研究所 | Nuclear magnetic resonance radio-frequency micro-coil and manufacturing method thereof |
| US20130187635A1 (en) * | 2012-01-19 | 2013-07-25 | Industrial Technology Research Institute | Electrical sensor for a two-wire power cable |
| CN105479463A (en) * | 2016-01-26 | 2016-04-13 | 清华大学 | Deformable and flexible robot based on liquid metal electromagnetic actuation |
| CN106876087A (en) * | 2017-03-17 | 2017-06-20 | 云南靖创液态金属热控技术研发有限公司 | A kind of close-coupled high-intensity magnetic field generating means |
| CN107887100A (en) * | 2017-10-31 | 2018-04-06 | 深圳大学 | A kind of flexible liquid metal inductance coil and preparation method and application |
| CN108417363A (en) * | 2018-02-10 | 2018-08-17 | 深圳大学 | A kind of liquid metal Wireless charging coil and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115524639A (en) * | 2022-10-31 | 2022-12-27 | 硕能(上海)自动化科技有限公司 | Hollow coil cable fault detection system based on MEMS sensor |
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Application publication date: 20190108 |
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