CN211061587U - Voltage sensor capable of being operated in electrified mode - Google Patents
Voltage sensor capable of being operated in electrified mode Download PDFInfo
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- CN211061587U CN211061587U CN201921498838.2U CN201921498838U CN211061587U CN 211061587 U CN211061587 U CN 211061587U CN 201921498838 U CN201921498838 U CN 201921498838U CN 211061587 U CN211061587 U CN 211061587U
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Abstract
The utility model provides a but live working's voltage sensor belongs to intelligent electrical equipment technical field. The current-limiting resistor box comprises a U-shaped structure, a conductor frame, an S-shaped electricity-taking pin, a voltage transformer, a current-limiting resistor box, a pressing plate, an insulating gasket and the like. The voltage transformer, the current-limiting resistor box and the conductor frame are integrally packaged, so that the field operation is simplified, and the rapid live-line loading and unloading are realized. The design of the S-shaped electricity taking needle improves the electricity taking efficiency by peeling, the stepped or wolf tooth design can well fix the lead when peeling and taking electricity, and the design of the insulating gasket protects the peeling opening of the lead. The current limiting resistor box enables the voltage transformer to adapt to wires of different voltage classes. The integration, miniaturization, compatibility, convenience, flexibility, reliability, safety and the like of the sensors required by intelligent electricity are realized. The whole sensor has simple structure, low cost and small volume, and can be widely applied to intelligent monitoring of voltage parameters of various wires.
Description
Technical Field
The utility model relates to a voltage sensor, especially a voltage sensor for realizing that intelligence is electric, ready-package can live working. Belongs to the technical field of intelligent electrical equipment.
Background
With the development of information technology and the recent introduction of intelligent manufacturing, the intellectualization of electrical equipment is the mainstream trend of future development, and the sensor part for carrying out intellectualized online monitoring of electrical equipment plays more and more important roles. In the operation of electrical equipment, the monitoring of the quality of electric energy, the intelligent operation fault diagnosis of the equipment, the intelligent control of the electrical equipment and the like are all based on the online real-time acquisition of the operation parameters of the electrical equipment and the accumulation of large operation data, and the current mainstream technology adopts a discrete sensor and adopts independent sensors in different systems, so that the defects of large volume, high cost, difficult loading and unloading, poor compatibility, power failure installation and the like exist, and the implementation and the development of the intelligent manufacturing in the electrical field are greatly restricted.
At present, a voltage transformer applied to electrical equipment monitoring needs to lead measured voltage to a measuring instrument through a wire, a wiring terminal is connected after power failure, and a voltage signal is taken out through the voltage transformer. No matter short-time or long-time power failure, the influence is caused to production and operation, and due to the fact that the requirement on power supply reliability is higher and higher, power failure construction is more and more difficult, and the requirement on live loading and unloading of the sensor is very urgent. In addition, the current-limiting resistor of the voltage transformer is generally arranged at the end of the measuring equipment, and the resistance value is constant, so that the current-limiting resistor cannot adapt to the change of the measured object, and the flexibility of the measuring equipment is poor, thereby bringing higher cost.
In the prior art, there are many patents for directly obtaining the voltage of a wire by adopting a puncturing manner, such as a chinese patent "a low-voltage power distribution cabinet power data acquisition module" (application No. 201610782346.0), a chinese patent "a feedthrough current transformer for obtaining the voltage of a sheathed wire by using a puncturing method" (application No. 2008100742561), a chinese patent "an open-close type current-voltage transformer" (application No. 201110237882X), a chinese patent "an electric energy metering device (application No. 2015106804237) capable of being installed on a cable", a chinese patent "a puncturing type integrated current transformer for obtaining the voltage (application No. 2016109645928), and the like, and the common characteristics of the current transformers are that an electricity-obtaining needle or a sawtooth is punctured into the wire in an external force pressing manner and an open-close type structure is adopted. Although the Chinese patent 'a multifunctional sensor' (application number: 2018211415312) adopts a mode of rotating to pierce a lead, the used spiral electricity taking pin is still of a common needle-shaped structure and is not different from the technology essentially.
In the prior art, a plurality of problems still exist:
1) the conductive metal pricks and the inner core of the lead are easy to knock against each other by adopting an external force compression mode, the contact effect is poor, and the tips of the lead and the conductive metal pricks are easy to damage; if the sheath of the wire is hard, a plurality of metal thorns or saw teeth are adopted to ensure the communication effect, a large external force is required to be applied, the sheath breaking effect is poor, the sheath breaking efficiency is low, and the whole electricity taking mechanism can be damaged;
2) the operation is relatively complex by adopting an open-close type structure, the wire is easy to damage, and the adaptability to wires with different diameters is poor;
3) the conductor skin-breaking position is not protected, particularly under the condition that the skin-breaking area is large by adopting a plurality of metal thorns or sawtooth modes, when the conductor runs for a long time, the conductor at the skin-breaking position is easily oxidized or corroded by the influence of the environment, so that the data acquisition error is large, and even the heating of the conductor causes the fault of connected equipment to influence the production;
4) the resistance of the voltage transformer is fixed, the measuring range is small, if the voltage transformer is required to be reselected when voltages of different grades are measured, the cost is increased by changing the phase, and the economical efficiency is poor;
5) the device has no conducting wire centering and fixing structure, and the object to be measured is easy to shift or roll, easy to be pricked and deflected, difficult to operate and poor in electric contact stability.
As an improvement technology, the Chinese patent 'an automatic power-taking type flexible mutual inductor and a using method thereof', wherein a tooth and a tooth-meshing belt '(application number: 2016111037297) are arranged at the longitudinal middle part of the inner wall of a lower body, and a plurality of tooth-meshing belts are arranged at the bottom surface of an arc-shaped pressing sheet'. The function of the toothed belt and the rodent is not described in the patent, but from the structural analysis, a puncture needle is fixedly arranged in the middle of the inner ring of the lower body, and the puncture needle is higher than the rodent belt for reliably puncturing the lead, so that the toothed belt cannot play a role in preventing the lead from rolling or deflecting. The tooth belt and the tooth teeth can only ensure that the wire is not easy to move after being completely compressed.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a voltage sensor capable of being operated in a live-line manner, so as to realize the quick assembly and disassembly of the intelligent electric sensor under the live-line condition, and ensure the integration, miniaturization, compatibility, convenience, flexibility, reliability, safety and the like; the intelligent monitoring system lays a foundation for realizing the intellectualization of the sensor and the on-line monitoring of the electrical equipment and the big data acquisition, and has the advantages of simple structure, live-line operation, convenient assembly and disassembly, low cost, safety, stability and the like.
The utility model provides a technical scheme that its technical problem adopted is:
the voltage sensor capable of being operated in a charged mode comprises a U-shaped structure (1), a conductor frame (2), an S-shaped electricity taking pin (3), a voltage transformer (4), a first input end (5) of the voltage transformer, a second input end (6) of the voltage transformer, an output end (7) of the voltage transformer, a lead (8) and a rotary wrench (9).
The U-shaped structure (1) is internally provided with a conductor frame (2), the outside is insulated, the conductor frame (2) is provided with a screw hole, and the S-shaped electricity taking needle (3) penetrates through the conductor frame (2) through the screw hole and is electrically connected with the conductor frame. The opening U-shaped structure (1) simultaneously plays a role of supporting and fixing the lead when screwing in and plays a role of the sensor, and the conductor frame (2) plays a role of conducting electricity.
The lead (8) is placed in the U-shaped structure (1), and the S-shaped electricity taking needle (3) is screwed into the insulation layer of the broken lead (8), so that the S-shaped electricity taking needle (3) is electrically connected with the inner conductor of the lead (8).
The S-shaped electricity taking needle (3) is structurally divided into three parts, the head part is of an S-shaped spiral structure, the top part is of a needle shape, the middle part is of a standard thread matched with a screw hole of the conductor frame (2), and the tail part is of a screw cap or a rotary wrench (9) with insulation. The head structure of the S-shaped electricity taking needle (3) is used for better breaking the skin, labor is saved during use, the S-shaped electricity taking needle (3) is easier to drill into the lead (8), and the phenomenon of jacking is avoided between the S-shaped electricity taking needle and the metal conductor due to rotary motion, so that the damage to the metal conductor is reduced; this structure acts like a drill, especially when the wire sheath is hard. When the tail part is a screw cap, a screwdriver with insulation can be used for assembling and disassembling the lead (8) in an electrified state; the insulated rotary wrench (9) is used for safely carrying out live loading and unloading without any other tools by field workers.
The U-shaped structure (1) is fixed with the voltage transformer (4), and the conductor frame (2) is directly led out through a cable or is connected with the first input end (5) of the voltage transformer through a current-limiting resistor. In a low-voltage distribution system, the voltage obtained by the conductor frame (2) is generally 220V or 380V, and the voltage can be used as a voltage signal or a power supply after being directly led out.
The second input end (6) of the voltage transformer is a wiring terminal or a flexible wire and is used for connecting a neutral line (phase voltage), a ground line (phase voltage) or another phase (line voltage). The output end (7) of the voltage transformer is a double-wire terminal or a twisted pair, and the twisted pair is a shielding wire. The twisted pair with the shielding layer has strong anti-interference capability, and the twisted pair directly outputs weak current signals of voltage which can be sampled. Terminals or cords are provided for ease of connection.
Furthermore, the S-shaped electricity taking needle (3) is positioned on one arm of the U-shaped structure (1), the other arm of the U-shaped structure (1) opposite to the S-shaped electricity taking needle is provided with a step-shaped structure (10) with a symmetrical contact surface with the conducting wire (8), and the symmetrical center point is aligned with the central axis of the S-shaped spiral structure of the S-shaped electricity taking needle (3). The U-shaped structure (1) can be an arc-shaped structure, the applicable wire diameter range is larger, and the lead (8) is convenient to put in and take out; can also prevent slight deformation after screwing and has better mechanical strength. The symmetrical stepped structures (10) can ensure that the lead (8) is stably placed, so that the lead is automatically centered, the S-shaped electricity taking needle (3) is convenient to screw into the lead (8), the lead (8) is prevented from sliding or moving back and forth during screwing, and stable and reliable electrical connection is realized; moreover, the effect of fixing the conducting wire (8) under different wire diameter ranges is much better than that of a common groove. The symmetrical stepped structure (10) can also be replaced by a symmetrical wolf tooth-shaped structure.
Furthermore, the voltage sensor capable of being operated in a charged mode comprises a pressing plate (11) and an insulating gasket (12), through holes are formed in the pressing plate, an S-shaped electricity taking needle (3) penetrates through the pressing plate (11) and the insulating gasket (12) through the through holes to be extruded into a lead (8), and the insulating gasket (12) is pressed on an insulating sheath of the lead (8) through the pressing plate (11).
The pressing plate (11) is made of arc-shaped hard materials, and the insulating gasket (12) is made of flexible insulating materials. The pressing plate (11) plays a role in supporting the insulating gasket (12), the insulating gasket (12) is made of flexible insulating materials, the place where the wire (8) is broken is sealed after the wire (8) is broken and powered, and when the wire is used for a long time, moisture and dust are prevented from entering the place where the wire is broken and influencing the wire (8). When in use, the pressing plate (11) and the insulating gasket (12) are sleeved on the S-shaped electricity taking needle (3), and then the S-shaped electricity taking needle (3) is screwed into the lead (8).
Further, the voltage sensor capable of being operated under the condition of electrification comprises a current limiting resistance box (13) and a protective cover (14), wherein the current limiting resistance box (13) is connected between the conductor frame (2) and the first input end (5) of the voltage transformer in series, and the current limiting resistance box (13) is installed on the sensor. The current-limiting resistor box (13) enables the current-limiting resistor to be placed in or taken out at any time, so that the current-limiting resistor can be conveniently replaced, namely the resistance value of the current-limiting resistor can be adjusted according to the voltage grade of a target to be measured or the requirement of an external instrument on an output signal, the accuracy of a measured value is ensured, and the whole voltage sensor does not need to be dismounted and replaced again. The current-limiting resistance box (13) is made of insulating materials, and after the current-limiting resistance box is installed, the protective cover (14) is covered on the current-limiting resistance box, and meanwhile, the waterproof and dustproof effects are achieved. The protective cover (14) can be transparent, so that the current-limiting resistance value can be directly observed, and a rubber plug can be used for replacing the protective cover. The U-shaped structure (1), the voltage transformer (4), the current limiting resistor box (13) and other components can be cast and packaged into a whole by adopting insulating materials.
Furthermore, the head of the S-shaped electricity taking needle (3) is of an S-shaped conical spiral structure, and the top of the S-shaped electricity taking needle is in a drill bit shape. It is more favorable to drill into the conducting wire (8) with harder insulating sheath.
Compared with the prior art, the utility model has the advantages of as follows:
1) the power taking structure combining the open U-shaped structure and the S-shaped power taking pin is adopted, and the integrated design with the voltage transformer is adopted, so that the intelligent and electrical sensor can be quickly assembled and disassembled under the electrified condition, and the integration, miniaturization, compatibility, convenience, flexibility, reliability, safety and the like are ensured; the field operation is simplified, the cost is reduced, the electrical connection is converted into the internal packaging wiring, the reliability is high, the anti-interference capability is strong, the service life is long, and the influence on the original electrical connection is small; the live loading and unloading are realized, the influence on production caused by power failure is avoided, and the device can be used immediately after loading and unloading and is convenient to measure.
2) By adopting the special structural design of the S-shaped electricity taking needle and the screw-in type working mode, the external force is very small, the skin breaking efficiency is high, the whole structure cannot be damaged by the external force, and the full contact with a conductor is favorably realized; the insulation gasket can well protect the skin breaking port of the lead, dust and moisture are prevented from entering the lead conductor from the skin breaking port during working to influence the service life of the conductor, faults caused by heating of the conductor at the skin breaking position are effectively avoided, and equipment and economic losses are caused.
3) Adopt symmetry stairstepping structural design, when taking electricity when breaking the skin, can fix the wire well, the horizontal drunkenness of wire when effectively preventing to break the skin is convenient for bore the screw into from the wire center, makes the screw fully contact with the conductor, and the sample is more accurate and stable. Moreover, the adaptability to the wires with different diameters is strong.
4) The current-limiting resistor box mode is adopted, the resistance value of the current-limiting resistor can be adjusted at any time according to the voltage grade of a target to be measured or the requirement of an external instrument on an output signal, and the whole voltage sensor does not need to be assembled and disassembled again and replaced while the measurement precision is ensured.
Drawings
FIG. 1: and the voltage sensor is in a structural schematic view.
FIG. 2: the structure and connection relation of the current-limiting resistance box are shown schematically.
In the figure: the transformer comprises a 1-U-shaped structure, a 2-conductor frame, a 3-S-shaped electricity taking pin, a 4-voltage transformer, a 5-voltage transformer first input end, a 6-voltage transformer second input end, a 7-voltage transformer output end, an 8-lead, a 9-rotary wrench, a 10-step structure, an 11-pressing plate, a 12-insulating gasket, a 13-current limiting resistor box and a 14-protective cover.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings:
fig. 1 is a schematic diagram of a voltage sensor. In fig. 1, the voltage sensor capable of being operated in a live manner comprises a U-shaped structure (1), a conductor frame (2), an S-shaped electricity taking pin (3), a voltage transformer (4), a first input end (5) of the voltage transformer, a second input end (6) of the voltage transformer, an output end (7) of the voltage transformer, a wire (8), a rotary wrench (9), a stepped structure (10), a pressing plate (11), an insulating gasket (12), a current limiting resistor box (13) and a protective cover (14).
In fig. 1, the U-shaped structure (1), the voltage transformer (4) and the current limiting resistor box (13) are packaged as a whole. The U-shaped structure (1) is internally provided with a conductor frame (2), the outside is insulated, the conductor frame (2) is provided with a through hole, and the S-shaped electricity taking needle (3) penetrates through the conductor frame (2) through the through hole and is electrically connected with the conductor frame. The open U-shaped structure (1) simultaneously plays a role in conducting electricity, supporting and fixing the conducting wire and the sensor during screwing. The conductor frame (2) can also be fixed on the voltage transformer (4) by screws, and has stable strength and is not easy to damage.
In fig. 1, the S-shaped electricity-taking needle (3) is located on one arm of the U-shaped structure (1), the other arm of the U-shaped structure (1) opposite to the S-shaped electricity-taking needle is provided with a step-shaped structure (10) with a symmetrical contact surface with the conducting wire (8), and the symmetrical center point is aligned with the central axis of the S-shaped spiral structure of the S-shaped electricity-taking needle (3).
In fig. 1, the conductor frame (2) is connected to one end of a current-limiting resistor box (13), the other end of the current-limiting resistor box (13) is connected to a first input end (5) of a voltage transformer, and a second input end (6) of the voltage transformer is a connection terminal or a flexible wire for connecting a neutral line (phase voltage), a ground line (phase voltage), or another phase (line voltage). The output end (7) of the voltage transformer is a double-wire terminal. The voltage transformer (4) and the current-limiting resistor box (13) are arranged at the bottom of the U-shaped structure (1), so that the size of the device can be reduced, and the device is convenient to install.
Fig. 2 is a schematic diagram showing the structure and connection relationship of the current limiting resistor box. In fig. 2, the protective cover (14) is installed outside the current limiting resistor box (13), the current limiting resistor box (13) is connected in series between the conductor frame (2) and the first input end (5) of the voltage transformer, the current limiting resistor is installed in the current limiting resistor box (13) in a buckling mode or a terminal mode, can be placed in or taken out at any time and is convenient to replace, and the protective cover (14) is made of insulating materials, so that the live replacement can be realized, and the safety and convenience are realized. The current-limiting resistor box (13) can also adjust the resistance value of the current-limiting resistor according to the voltage grade of the target to be measured, so that the accuracy of the measured value is ensured. The current limiting resistor box (13) is made of insulating materials, after the current limiting resistor is installed, a protective cover (14) is covered, the protective cover (14) is transparent, and specific resistance values can be seen. The protective cover (14) also has the functions of water resistance and dust resistance.
In fig. 1, the S-shaped electricity-collecting needle (3) is structurally divided into three parts, the head part is in an S-shaped spiral structure, the top part is in a needle shape, the whole body is in a conical spiral structure, the contact part of the middle part and the conductor frame (2) is in a standard thread shape, and the tail part is provided with an insulated rotating wrench (9). The head structure of the S-shaped electricity taking needle (3) is used for better breaking the skin, labor is saved during use, the S-shaped electricity taking needle (3) is easier to drill into the lead (8), and the top ox phenomenon is avoided between the S-shaped electricity taking needle and the metal conductor due to rotary motion, so that the damage to the metal conductor is reduced; this structure acts like a drill, especially when the wire sheath is hard. And the S-shaped spiral structure at the head of the S-shaped electricity taking needle (3) is more beneficial to fully contacting with the conductor part in the lead (8), so that the measurement is more accurate.
In the figure 1, when the device is installed in a charged state, a lead (8) is firstly put into the U-shaped structure (1) from an opening on the side face and is clamped into the stepped structure (10), so that automatic centering is realized; and then the S-shaped electricity taking needle (3) is screwed into the insulation layer of the broken lead (8) by using an insulated rotary wrench (9), so that the electrical connection between the S-shaped electricity taking needle (3) and the inner conductor of the lead (8) is realized, and the live-line operation of the sensor is realized.
In fig. 1, the voltage sensor capable of being operated in a charged mode comprises a pressure plate (11) and an insulating gasket (12), wherein a through hole is formed in the pressure plate, and the diameter of the through hole is smaller than that of a standard thread in the middle of an S-shaped electricity taking needle (3); the S-shaped electricity taking needle (3) penetrates through the pressing plate (11) and the insulating gasket (12) through the through hole and is extruded into the lead (8), and the insulating gasket (12) is pressed on the insulating sheath of the lead (8) through the pressing plate (11).
The pressing plate (11) is made of arc-shaped hard materials, and the insulating gasket (12) is made of flexible insulating materials. The pressing plate (11) plays a role in supporting the insulating gasket (12), the insulating gasket (12) is made of flexible insulating materials, the place where the wire (8) is broken is sealed after the wire (8) is broken and powered, and when the wire is used for a long time, moisture and dust are prevented from entering the place where the wire is broken, and the wire (8) is affected. When in use, the pressing plate (11) and the insulating gasket (12) are firstly sleeved on the S-shaped electricity taking needle (3), and then the S-shaped electricity taking needle (3) is screwed into the lead (8).
In fig. 1, the U-shaped structure (1) can be designed into an arc shape, i.e. a C-shaped structure, the range of the accommodated wire diameter is larger, and the wires (8) can be conveniently put in and taken out; adopt the arc structure, still can prevent to take place slight deformation after screwing up, mechanical strength is better, and stairstepping structure (10) guarantee that wire (8) are put stably, make its automatic centering, and the S-shaped electricity of being convenient for gets in needle (3) screw in wire (8), prevents that wire (8) from making a round trip to slide or drunkenness during screw in, realizes reliable and stable electrical connection.
The top of the S-shaped electricity taking needle (3) is provided with an insulated rotating wrench (9). The insulated rotary wrench (9) is used for safely carrying out live loading and unloading without any other tools by field workers.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A voltage sensor operable with electricity, characterized in that: the power supply comprises a U-shaped structure (1), a conductor frame (2), an S-shaped electricity taking pin (3), a voltage transformer (4), a first input end (5) of the voltage transformer, a second input end (6) of the voltage transformer, an output end (7) of the voltage transformer, a lead (8) and a rotary wrench (9);
the U-shaped structure (1) is internally provided with a conductor frame (2), the outside is insulated, the conductor frame (2) is provided with a screw hole, and the S-shaped electricity taking needle (3) penetrates through the conductor frame (2) through the screw hole and is electrically connected with the conductor frame;
the lead (8) is placed in the U-shaped structure (1), and the S-shaped electricity taking needle (3) is screwed into the insulating sheath of the broken lead (8) to realize the electrical connection between the S-shaped electricity taking needle (3) and the conductor inside the lead (8);
the S-shaped electricity taking needle (3) is structurally divided into three parts, the head part is of an S-shaped spiral structure, the top part is of a needle shape, the middle part is of standard threads matched with a screw hole of the conductor frame (2), and the tail part is provided with a screw cap or an insulated rotary wrench (9);
the U-shaped structure (1) is fixed with the voltage transformer (4), and the conductor frame (2) is directly led out through a cable or is connected with a first input end (5) of the voltage transformer through a current-limiting resistor;
the second input end (6) of the voltage transformer is a wiring terminal or a flexible wire, the output end (7) of the voltage transformer is a double-wire terminal or a twisted pair, and the twisted pair is a shielding wire.
2. A live-wire operable voltage sensor according to claim 1, wherein: the S-shaped electricity taking needle (3) is positioned on one arm of the U-shaped structure (1), the contact surface of the other arm of the U-shaped structure (1) opposite to the S-shaped electricity taking needle and the conducting wire (8) is of a symmetrical stepped structure (10), and the symmetrical center point is aligned with the central axis of the S-shaped spiral structure of the S-shaped electricity taking needle (3).
3. A live-wire operable voltage sensor according to claim 1, wherein: the voltage sensor comprises a pressing plate (11) and an insulating gasket (12), a through hole is formed in the pressing plate, an S-shaped electricity taking needle (3) penetrates through the pressing plate (11) and the insulating gasket (12) through the through hole and is extruded into the lead (8), and the insulating gasket (12) is pressed on an insulating sheath of the lead (8) by the pressing plate (11); the pressing plate (11) is made of arc-shaped hard materials, and the insulating gasket (12) is made of flexible insulating materials.
4. A live-wire operable voltage sensor according to claim 1, wherein: the current limiting device comprises a current limiting resistance box (13) and a protective cover (14), wherein the current limiting resistance box (13) is connected between a conductor frame (2) and a first input end (5) of a voltage transformer in series, and the current limiting resistance box (13) is installed on the sensor.
5. A live-wire operable voltage sensor according to claim 1, wherein: the head of the S-shaped electricity taking needle (3) is of an S-shaped conical spiral structure, and the top of the S-shaped electricity taking needle is in a drill bit shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921498838.2U CN211061587U (en) | 2019-09-09 | 2019-09-09 | Voltage sensor capable of being operated in electrified mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921498838.2U CN211061587U (en) | 2019-09-09 | 2019-09-09 | Voltage sensor capable of being operated in electrified mode |
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| CN211061587U true CN211061587U (en) | 2020-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456117A (en) * | 2019-09-09 | 2019-11-15 | 周封 | Intelligent electric ready-package can hot line job voltage sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456117A (en) * | 2019-09-09 | 2019-11-15 | 周封 | Intelligent electric ready-package can hot line job voltage sensor |
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Granted publication date: 20200721 Termination date: 20210909 |