CN111863334B - High-safety communication cable and using method thereof - Google Patents
High-safety communication cable and using method thereof Download PDFInfo
- Publication number
- CN111863334B CN111863334B CN202010763939.9A CN202010763939A CN111863334B CN 111863334 B CN111863334 B CN 111863334B CN 202010763939 A CN202010763939 A CN 202010763939A CN 111863334 B CN111863334 B CN 111863334B
- Authority
- CN
- China
- Prior art keywords
- layer
- outward
- cable
- conducting layer
- conducting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/328—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising violation sensing means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
- H01B7/361—Insulated conductors or cables characterised by their form with distinguishing or length marks being the colour of the insulation or conductor
Landscapes
- Woven Fabrics (AREA)
Abstract
The utility model provides a high security communication cable and application method thereof, cable structure includes the cable core, the cable core is equipped with the high strength nylon cloth layer outward, the high strength nylon cloth layer is equipped with the polytetrafluoroethylene film layer outward, the polytetrafluoroethylene film layer is equipped with the yarn layer that blocks water outward, the yarn layer that blocks water is equipped with the deliquescent layer outward, deliquescent in situ is equipped with conducting layer A and conducting layer B, conducting layer A is the copper weaving layer, conducting layer B comprises a plurality of copper weaving layers and a plurality of resistance ring interval links to each other, and conducting layer A and conducting layer B surface all coat have the water-soluble insulating layer, deliquescent in situ is equipped with the dyeing layer outward, the dyeing layer is equipped with the medium density polyethylene layer outward, the medium density polyethylene layer is equipped with polyurethane restrictive coating outward. The invention adopts double positioning, can accurately position the damage on any point of the cable, obtains a communication cable with high safety, enables the maintainer to quickly maintain and reduces the loss to the minimum.
Description
Technical Field
The invention belongs to the technical field of cables, and particularly relates to a high-safety communication cable easy for finding a damage point.
Background
A communications cable is a cable that transmits telephone, telegraph, facsimile documents, television and radio programs, data and other electrical signals. Is formed by twisting more than one pair of mutually insulated wires.
Because of the reasons such as worm damage (such as termite gnawing), natural aging of materials, artificial damage, the communication cable can be damaged, the communication cable is often very long and many are buried in underground pipelines, and the damage is difficult to find in time only by daily inspection and tour.
The damage of the cable generally slowly appears, and the following benefits can be found in time at the early stage of the damage of the cable: the problems are found in time, and larger loss is avoided, especially for communication cables used in special fields such as national defense and medical treatment.
Therefore, the communication cable capable of accurately positioning the damage point is promising in the market.
Disclosure of Invention
In order to meet the requirements, the invention provides a high-safety communication cable and a using method thereof, wherein the high-safety communication cable has a breakage alarm function, and can quickly and accurately locate a breakage position, so that a maintainer can prepare in advance and repair quickly, and the loss is reduced to the minimum.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-safety communication cable comprises a cable core, wherein the cable core comprises a plurality of twisted pairs and glass wool fibers, each twisted pair is formed by twisting two wires in pairs, and all the twisted pairs are arranged in the glass wool fibers;
the cable core is equipped with the high strength nylon cloth layer outward, the high strength nylon cloth layer is equipped with the polytetrafluoroethylene thin film layer outward, the polytetrafluoroethylene thin film layer is equipped with the yarn layer that blocks water outward, the yarn layer that blocks water is equipped with the deliquescent layer outward, deliquescent in situ is equipped with conducting layer A and conducting layer B, conducting layer A is the copper weaving layer, conducting layer B links to each other by a plurality of copper weaving layers and a plurality of resistance ring interval and forms, and conducting layer A and conducting layer B surface all coat have the water-soluble insulating layer, deliquescent layer is equipped with the dyeing layer outward, the dyeing layer is equipped with the medium density polyethylene layer outward, the medium density polyethylene layer is equipped with the polyurethane restrictive coating outward.
Preferably, the structure of the wire is as follows: the innermost layer is the copper core, the copper core is equipped with the high density polyethylene layer outward, the high density polyethylene layer is equipped with the aluminium foil layer outward.
Preferably, the dyeing layer comprises the following components by mass: 10-20 parts of dyeing powder and 1-2 parts of water-absorbing expansion resin.
More preferably, the coloring powder is any one of fruit green, indigo and carmine.
Preferably, conductive layer a and conductive layer B are spaced apart by a distance of between 2mm and 10 mm.
Preferably, the deliquescent substance is: anhydrous calcium chloride or magnesium chloride.
Preferably, the water-soluble insulating layer is made of: low temperature water soluble polyvinyl alcohol.
The using method comprises the following steps: the conducting layer A and the conducting layer B are respectively connected to one end of a power supply, a safety resistor and a current converter are connected in series in a circuit, the current converter is connected with a single chip microcomputer, the single chip microcomputer is connected with a display, and the single chip microcomputer calculates the distance between the damage points according to current in a loop.
Preferably, the single chip microcomputer is further connected with a plurality of temperature sensors, the temperature sensors are used for measuring the temperature of the environment where the cable is located, and the single chip microcomputer can calculate the distance between the damage points according to the temperature and the current in the loop.
Preferably, the power supply voltage is not higher than 36V.
Deliquescence refers to the phenomenon in which some substance absorbs or adsorbs water from the air, causing the surface to become increasingly moist and lubricious, and eventually the substance changes from a solid to a solution of the substance.
When the cable is destroyed, the deliquescent substance is not in a closed state, and can absorb moisture in the air to deliquesce, at the moment, the water-soluble insulating layers outside the conducting layer A and the conducting layer B can be dissolved, the water-blocking yarns can also absorb water to expand, the conducting layer A is extruded, the conducting layer A and the conducting layer B are in touch electrification, a small amount of water-absorbing expansion resin is mixed in the dyeing layer, dyeing powder is extruded, the wound is better colored, and the wound cannot be completely blocked, so that the deliquescent substance is influenced in water absorption and deliquescence.
The single chip is an integrated circuit chip, which integrates the functions of CPU, RAM, ROM, I/O ports and interrupt system, timer/counter, etc. with data processing capacity into a small and perfect microcomputer system on a silicon chip by using very large scale integrated circuit technology.
The longer the distance of the damaged point is, the smaller the current in a loop formed by the conducting layer A and the conducting layer B is, the equal and known resistance of the unit distance is in an ideal state, and according to I = U/R, the single chip microcomputer can calculate the position of the damaged point according to the current and the environmental temperature of the reference cable, and displays the position of the damaged point to the maintainer.
In practice, because uncertain impurities may exist between the conductive layer A and the conductive layer B and the influence of the actual production process of the resistance ring cannot ensure that the resistance values of unit distances are completely consistent, the singlechip obtains only an approximate distance numerical value, and a maintainer inspects after arriving at a site and can quickly determine a specific damage point according to a cable surface coloring agent.
If not be equipped with the resistance ring, conducting layer A and conducting layer B only adopt the minimum copper weaving layer of self resistance, if there is impurity between conducting layer A and the conducting layer B, can produce very big influence to the determination of distance, are equipped with the resistance ring on conducting layer B, make conducting layer B have certain resistance value, reduce the interference of impurity to measuring the distance between conducting layer A and the conducting layer B.
The structural design of the invention enables minor injuries, such as needle stick injuries, to be easily discovered, and the maintenance personnel do not need to spend a great deal of time searching for a damage point after arriving at the site.
The deliquescent substance enables the conductive layer A and the conductive layer B to be quickly conducted and alarm in a dry place, and the application range of the communication cable is greatly enlarged.
Conducting layer A and conducting layer B are whole cable core of netted parcel, make the damage on the arbitrary point can both be detected, still play the effect of shielding external interference signal and reinforcing cable structural strength simultaneously.
When the cable is complete, the conducting layer A and the conducting layer B are mutually separated and are not electrified, and the conducting layer A and the conducting layer B are covered with water-soluble insulating layers, so that the conducting layer A and the conducting layer B can be prevented from being mutually contacted and communicated by external compression to cause false alarm, and the low-temperature water-soluble polyvinyl alcohol also has high solubility at extremely low temperature.
The invention has the beneficial effects that: through inner structure's design and utilization material characteristic, adopt dual location, the location that can be very accurate goes out the damage on the cable random point, obtains the communication cable of a high security, makes the maintainer can overhaul fast, falls to the loss to minimumly.
Drawings
The invention is further illustrated with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the lead.
Fig. 3 is a schematic structural diagram of the conductive layer B.
In the figure: 1. the cable comprises a twisted pair, 2 glass wool fibers, 3 high-strength nylon cloth layers, 4 polytetrafluoroethylene film layers, 5 water-blocking yarn layers, 6 deliquescent layers, 7 conductive layers A, 8 conductive layers B, 8.1 resistance rings, 8.2 copper woven layers, 9 medium-density polyethylene layers, 10 dyeing layers and 11 polyurethane sheath layers.
Detailed Description
Example 1
In fig. 1 to 3 are: a high security communications cable, comprising: 1. the cable comprises a twisted pair, 2 parts of glass wool fibers, 3 parts of a high-strength nylon cloth layer, 4 parts of a polytetrafluoroethylene film layer, 5 parts of a water blocking yarn layer, 6 parts of a deliquescent layer, 7 parts of a conductive layer A, 8 parts of a conductive layer B, 8.1 parts of a high-resistance net, 8.2 parts of a low-resistance net, 9 parts of a medium-density polyethylene layer, 10 parts of a dyeing layer and 11 parts of a polyurethane sheath layer.
The cable comprises a cable core, wherein the cable core comprises a plurality of twisted pairs and glass wool fibers, each twisted pair is formed by twisting two wires in pairs, and all the twisted pairs are arranged in the glass wool fibers;
the cable core is equipped with the high strength nylon cloth layer outward, the high strength nylon cloth layer is equipped with the polytetrafluoroethylene thin film layer outward, the polytetrafluoroethylene thin film layer is equipped with the yarn layer that blocks water outward, the yarn layer that blocks water is equipped with the deliquescent layer outward, deliquescent in situ is equipped with conducting layer A and conducting layer B, conducting layer A is the copper weaving layer, conducting layer B links to each other by a plurality of copper weaving layers and a plurality of resistance ring interval and forms, and conducting layer A and conducting layer B surface all coat have the water-soluble insulating layer, deliquescent layer is equipped with the dyeing layer outward, the dyeing layer is equipped with the medium density polyethylene layer outward, the medium density polyethylene layer is equipped with the polyurethane restrictive coating outward.
In this example, the structure of the wire is: the innermost layer is the copper core, the copper core is equipped with the high density polyethylene layer outward, the high density polyethylene layer is equipped with the aluminium foil layer outward.
In this example, the dyeing layer comprises the following components by mass: 15 parts of fruit green powder and 1 part of water-swelling resin.
In this example, conductive layer a and conductive layer B are spaced apart by 3 mm.
In this example, the deliquescent substance is: anhydrous calcium chloride.
In this embodiment, the water-soluble insulating layer is made of: low temperature water soluble polyvinyl alcohol.
The cable using method comprises the following steps: the conducting layer A and the conducting layer B are respectively connected to one end of a power supply, the power supply voltage is 36V, a safety resistor and a current converter are connected in series in a circuit, the current converter is connected with a single chip microcomputer, the single chip microcomputer is connected with a display, and the single chip microcomputer calculates the distance between the damage points according to the current in a loop.
Preferably, the single chip microcomputer is further connected with a plurality of temperature sensors, the temperature sensors are used for measuring the temperature of the environment where the cable is located, and the single chip microcomputer can calculate the distance between the damage points according to the temperature and the current in the loop.
Example 2
In fig. 1 to 3 are: a high security communications cable, comprising: 1. the cable comprises a twisted pair, 2 parts of glass wool fibers, 3 parts of a high-strength nylon cloth layer, 4 parts of a polytetrafluoroethylene film layer, 5 parts of a water blocking yarn layer, 6 parts of a deliquescent layer, 7 parts of a conductive layer A, 8 parts of a conductive layer B, 8.1 parts of a high-resistance net, 8.2 parts of a low-resistance net, 9 parts of a medium-density polyethylene layer, 10 parts of a dyeing layer and 11 parts of a polyurethane sheath layer.
The cable comprises a cable core, wherein the cable core comprises a plurality of twisted pairs and glass wool fibers, each twisted pair is formed by twisting two wires in pairs, and all the twisted pairs are arranged in the glass wool fibers;
the cable core is equipped with the high strength nylon cloth layer outward, the high strength nylon cloth layer is equipped with the polytetrafluoroethylene thin film layer outward, the polytetrafluoroethylene thin film layer is equipped with the yarn layer that blocks water outward, the yarn layer that blocks water is equipped with the deliquescent layer outward, deliquescent in situ is equipped with conducting layer A and conducting layer B, conducting layer A is the copper weaving layer, conducting layer B links to each other by a plurality of copper weaving layers and a plurality of resistance ring interval and forms, and conducting layer A and conducting layer B surface all coat have the water-soluble insulating layer, deliquescent layer is equipped with the dyeing layer outward, the dyeing layer is equipped with the medium density polyethylene layer outward, the medium density polyethylene layer is equipped with the polyurethane restrictive coating outward.
In this example, the structure of the wire is: the innermost layer is the copper core, the copper core is equipped with the high density polyethylene layer outward, the high density polyethylene layer is equipped with the aluminium foil layer outward.
In this example, the dyeing layer comprises the following components by mass: 16 parts of carmine and 1.5 parts of water-swellable resin.
In this example, conductive layer a and conductive layer B are separated by a distance of 5 mm.
In this example, the deliquescent substance is: anhydrous calcium chloride.
In this embodiment, the water-soluble insulating layer is made of: low temperature water soluble polyvinyl alcohol.
The cable using method comprises the following steps: the conducting layer A and the conducting layer B are respectively connected to one end of a power supply, the power supply voltage is 36V, a safety resistor and a current converter are connected in series in a circuit, the current converter is connected with a single chip microcomputer, the single chip microcomputer is connected with a display, and the single chip microcomputer calculates the distance between the damage points according to the current in a loop.
Preferably, the single chip microcomputer is further connected with a plurality of temperature sensors, the temperature sensors are used for measuring the temperature of the environment where the cable is located, and the single chip microcomputer can calculate the distance between the damage points according to the temperature and the current in the loop.
Claims (9)
1. The utility model provides a high security communication cable, includes the cable core, characterized by: the cable core comprises a plurality of twisted pairs and glass wool fibers, each twisted pair is formed by twisting two wires in pairs, and all the twisted pairs are arranged in the glass wool fibers;
the cable core is equipped with the high strength nylon cloth layer outward, the high strength nylon cloth layer is equipped with the polytetrafluoroethylene thin film layer outward, the polytetrafluoroethylene thin film layer is equipped with the yarn layer that blocks water outward, the yarn layer that blocks water is equipped with the deliquescent layer outward, deliquescent in situ is equipped with conducting layer A and conducting layer B, conducting layer A is the copper weaving layer, conducting layer B links to each other by a plurality of copper weaving layers and a plurality of resistance ring interval and forms, and conducting layer A and conducting layer B surface all coat have the water-soluble insulating layer, deliquescent layer is equipped with the dyeing layer outward, the dyeing layer is equipped with the medium density polyethylene layer outward, the medium density polyethylene layer is equipped with the polyurethane restrictive coating outward.
2. A high security communications cable as claimed in claim 1: the method is characterized in that: the structure of the wire is as follows: the innermost layer is the copper core, the copper core is equipped with the high density polyethylene layer outward, the high density polyethylene layer is equipped with the aluminium foil layer outward.
3. A high security communication cable as defined in claim 1, wherein: the deliquescent substance is: anhydrous calcium chloride or magnesium chloride.
4. A high security communication cable as defined in claim 1, wherein: the water-soluble insulating layer is made of the following materials: low temperature water soluble polyvinyl alcohol.
5. A high security communication cable as defined in claim 1, wherein: the dyeing layer comprises the following components in parts by mass: 10-20 parts of dyeing powder and 1-2 parts of water-absorbing expansion resin.
6. A high security communication cable according to claim 5, wherein: the dyeing powder is any one of fruit green, indigo and carmine.
7. A high security communication cable as defined in claim 1, wherein: conductive layer a and conductive layer B are spaced apart by a distance of between 2mm and 10 mm.
8. A method of using a high security communications cable as claimed in claim 1, wherein: the conducting layer A and the conducting layer B are respectively connected to one end of a power supply, a safety resistor and a current converter are connected in series in a circuit, the current converter is connected with a single chip microcomputer, the single chip microcomputer is connected with a display, and the single chip microcomputer calculates the distance between the damage points according to current in a loop.
9. The method of claim 8, wherein the communication cable is used in a high security mode, comprising: the single chip microcomputer is further connected with a plurality of temperature sensors, the temperature sensors are used for measuring the temperature of the environment where the cable is located, and the single chip microcomputer can calculate the distance between the damage points according to the temperature and the current in the loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010763939.9A CN111863334B (en) | 2020-08-01 | 2020-08-01 | High-safety communication cable and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010763939.9A CN111863334B (en) | 2020-08-01 | 2020-08-01 | High-safety communication cable and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111863334A CN111863334A (en) | 2020-10-30 |
| CN111863334B true CN111863334B (en) | 2021-08-27 |
Family
ID=72952519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010763939.9A Active CN111863334B (en) | 2020-08-01 | 2020-08-01 | High-safety communication cable and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111863334B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112820457A (en) * | 2020-12-23 | 2021-05-18 | 喜天奇(江苏)电子有限公司 | Cold-resistant anti-freezing polyurethane sheath communication cable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859989A (en) * | 1987-12-01 | 1989-08-22 | W. L. Gore & Associates, Inc. | Security system and signal carrying member thereof |
| GB2212644B (en) * | 1987-11-19 | 1991-10-09 | Gore & Ass | A signal-carrying member for a security system |
| JPH06187843A (en) * | 1992-12-18 | 1994-07-08 | Showa Electric Wire & Cable Co Ltd | Cable with water penetration detecting function and combined tape for holding roll for use with cable |
| CN110993172A (en) * | 2019-12-31 | 2020-04-10 | 江苏江扬特种电缆有限公司 | Control cable for ships and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0202056D0 (en) * | 2002-01-30 | 2002-03-13 | Reckitt Benckiser Uk Ltd | Device |
| CN111029002B (en) * | 2019-12-26 | 2020-08-18 | 江苏江扬特种电缆有限公司 | Cable for ocean platform and production process thereof |
-
2020
- 2020-08-01 CN CN202010763939.9A patent/CN111863334B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212644B (en) * | 1987-11-19 | 1991-10-09 | Gore & Ass | A signal-carrying member for a security system |
| US4859989A (en) * | 1987-12-01 | 1989-08-22 | W. L. Gore & Associates, Inc. | Security system and signal carrying member thereof |
| JPH06187843A (en) * | 1992-12-18 | 1994-07-08 | Showa Electric Wire & Cable Co Ltd | Cable with water penetration detecting function and combined tape for holding roll for use with cable |
| CN110993172A (en) * | 2019-12-31 | 2020-04-10 | 江苏江扬特种电缆有限公司 | Control cable for ships and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111863334A (en) | 2020-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111863334B (en) | High-safety communication cable and using method thereof | |
| CN204855025U (en) | Be used for cable intermediate head temperature field measuring temperature measurement testing system | |
| CN206379209U (en) | Power cable, power cable monitoring device and system | |
| CN207765547U (en) | A kind of conducting liquid battery and its leak detecting device | |
| JPS63255652A (en) | Detector | |
| CN203616029U (en) | Friction pressure sensing cable | |
| CN110069088A (en) | A kind of reading intelligent agriculture control monitoring system based on NB-IOT | |
| CN102740506A (en) | Termite detection system based on wireless sensing network | |
| CN110320248B (en) | Soil water potential distribution detection device and detection method | |
| CN111029002B (en) | Cable for ocean platform and production process thereof | |
| CN209114963U (en) | A kind of thorn netting and circumference monitoring protection net | |
| CN107462777A (en) | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions | |
| CN207910824U (en) | A kind of equipment state Internet of Things monitoring system based on NB-IOT technologies | |
| CN207820034U (en) | A kind of transmission line of electricity blocking multifunctional monitoring device | |
| CN205753656U (en) | A kind of leakage current Check System | |
| CN111863335B (en) | Power cable | |
| CN211740434U (en) | Three-dimensional temperature measurement wireless sensor for power cable connector | |
| CN205644178U (en) | Wireless monitoring devices of granary | |
| CN102354440A (en) | Information acquisition device and online monitoring system for electric connection part | |
| CN204667985U (en) | Intelligent cable | |
| CN202511897U (en) | Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables | |
| CN208140281U (en) | A kind of soil moisture monitoring system | |
| CN207424114U (en) | A kind of system for progress multichannel power frequency electric field measurement under high humidity conditions | |
| CN203965049U (en) | A kind of distributed wireless temperature monitoring system | |
| CN208257971U (en) | A kind of visual image wireless sensing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |