CN115541976A - Detection tool for current loop live detection and detection method thereof - Google Patents
Detection tool for current loop live detection and detection method thereof Download PDFInfo
- Publication number
- CN115541976A CN115541976A CN202211345038.3A CN202211345038A CN115541976A CN 115541976 A CN115541976 A CN 115541976A CN 202211345038 A CN202211345038 A CN 202211345038A CN 115541976 A CN115541976 A CN 115541976A
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- current
- measuring
- current loop
- detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
Abstract
The invention discloses a detection tool for detecting the live of a current loop and a detection method thereof, relates to the technical field of circuit detection, and solves the problems that a pincer-shaped ammeter is difficult to operate when the current loop is verified to have or not to have current and the accurate detection cannot be realized when a plurality of leads are crimped at the terminal of the same current loop in the prior art, and the technical scheme is characterized in that: through supporting the first measurement foot and the second measurement foot that are connected with the current measurement branch simultaneously on same current terminal connection piece after, observe instruction module instruction state, reach the purpose that whether has the electric current to pass through of measuring binding post and the current loop that awaits measuring conveniently, accurately, and solved the inconvenient problem of current loop connection piece detection that is in narrow and small space. Meanwhile, in the detection process, the current measurement branch is connected with the tested current terminal connecting piece in parallel, the size and the direction of the current flowing into and out of the current terminal can not be influenced, and the influence of the detection tool for the live detection of the current loop on the tested current loop and related equipment is reduced.
Description
Technical Field
The invention relates to the technical field of circuit detection, in particular to a detection tool for live detection of a current loop and a detection method thereof.
Background
The secondary equipment of the transformer substation and the power plant realizes the protection of the power grid and the primary equipment by monitoring the changes of electric quantities such as current, voltage and the like of the power system. Generally, before primary and secondary equipment is overhauled, safety measures need to be arranged on a current loop of the secondary equipment. Before the current loop is arranged with safety measures, whether the current loop is electrified or not needs to be determined, then the operation of short-circuiting or disconnecting the current loop connecting sheet can be carried out, otherwise, the operation of short circuiting or disconnecting the current loop by mistake can be caused, personnel and equipment damage can be caused, and the power grid does not have fault tripping and load loss can be caused.
At present, the mainstream method for verifying whether a current loop has or not is to measure and judge by means of a pincer-shaped ammeter, but because the space in a secondary equipment screen cabinet is narrow and the wiring is dense, the jaw of the pincer-shaped ammeter is larger, the measurement operation is difficult, and the risk of open circuit of the running current loop caused by inaccurate measurement or lead falling due to improper use exists; when the secondary circuit is complex in wiring and a plurality of wires are crimped on the same current circuit terminal, the electrification condition of the current circuit connecting sheet cannot be judged by respectively measuring the current of a single wire, and the judgment can be carried out only by depending on human experience, so that a greater risk exists; meanwhile, as the current loop of the secondary equipment is provided with the grounding point, when the contact type test pencil is used for measuring the current loop, the current cannot flow through the test pencil and a human body, so that the contact type test pencil cannot judge whether the current loop connecting sheet is electrified, and other non-contact measuring tools can only judge whether a certain area is electrified or not and cannot accurately judge whether a certain current loop connecting sheet is electrified or not.
Disclosure of Invention
The invention aims to provide a detection tool for detecting the live of a current loop and a detection method thereof. Meanwhile, in the detection process, the current measurement branch is connected with the tested current terminal connecting piece in parallel, the size and the direction of the current flowing into and out of the current terminal can not be influenced, and the influence of the detection tool for the live detection of the current loop on the tested current loop and related equipment is reduced.
The technical purpose of the invention is realized by the following technical scheme:
a detection tool for live detection of a current loop, comprising:
a housing, said housing being insulated; the measuring pins are arranged at the end part of the shell and comprise first measuring pins and second measuring pins close to the first measuring pins; the current measuring branch is arranged in the shell, and two ends of the current measuring branch are respectively connected with the first measuring pin and the second measuring pin, so that the current measuring branch is connected with a current loop to be measured through the first measuring pin and the second measuring pin to form a branch circuit; the Hall sensor is sleeved in the middle of the current measuring branch and used for outputting voltage when current flows through the current measuring branch; the indicating module is arranged on the shell and is connected with the output end of the Hall sensor; the power supply is arranged in the shell, and the power output end is connected with the Hall sensor.
Furthermore, the device also comprises a voltage stabilizing module arranged in the shell; the voltage stabilizing module is connected with the output end of the power supply; and the indicating module is connected with the Hall sensor through the voltage stabilizing module.
Further, the device also comprises a button switch arranged on the shell; the power supply is connected with the voltage stabilizing module and the Hall sensor through the button switch respectively.
Further, the device also comprises a sheath with one open end; the sheath is arranged at the end part of the shell and used for buckling the measuring foot cover in the sheath.
Furthermore, a gap is arranged between the sheath and the end part of the measuring foot.
Furthermore, the distance between the first measuring pin and the second measuring pin is greater than the sum of the length of the first measuring pin and the length of the second measuring pin.
Further, a battery compartment with an opening at one end is arranged on the shell; the power supply is arranged in the battery bin; and the detection tool for the live detection of the current loop further comprises a cover plate matched with the opening of the battery compartment.
Further, the current measuring branch is provided with an insulating outer layer.
Further, the indication module is embedded in the shell; and a light outlet cover corresponding to the indicating module is arranged on the shell.
A detection method for current loop live detection, which adopts the detection tool for current loop live detection to perform current loop live detection, comprises the following steps:
connecting the first measuring pin and the second measuring pin to the same current terminal connecting piece;
acquiring the current state of the indicating module, and if the indicating module is in a first state, enabling current to flow through the current terminal connecting piece; and if the indicating module is in the second state, no current flows through the current terminal connecting sheet.
Compared with the prior art, the invention has the following beneficial effects:
a first measuring pin and a second measuring pin which are connected with a current measuring branch are simultaneously abutted on the same current terminal connecting piece, and then the indicating state of an indicating module is observed, so that the purpose of conveniently and rapidly measuring whether current passes through a connecting terminal and a current loop to be measured is achieved, and the problem that the current loop connecting piece in a narrow space is inconvenient to detect is solved. Meanwhile, in the detection process, the current measurement branch is connected with the tested current terminal connecting piece in parallel, the size and the direction of the current flowing into and out of the current terminal can not be influenced, and the influence of the detection tool for the live detection of the current loop on the tested current loop and related equipment is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a detection tool for detecting a current loop in this embodiment;
FIG. 2 is a schematic structural diagram of a Hall sensor for a detection tool for detecting the live line of a current loop according to the present embodiment;
FIG. 3 is a schematic diagram of a current measurement branch structure for a detection tool for detecting the live line of a current loop in the present embodiment;
fig. 4 is a schematic structural diagram of a hall sensor sleeved in a middle portion of a current measurement branch in the detection tool for detecting a current loop in a live line manner in this embodiment.
Reference numbers and corresponding part names in the drawings:
1-a gap; 2-a sheath; 3-cover plate; 4-a shell; 5-current measurement branch; 6-Hall sensor; 7-a voltage stabilizing module; 8-an indication module; 9-a power supply; 10-a push-button switch; 11-a measurement loop; 12-a conversion section; 13-a first measurement leg; 14-a second measurement leg; 15-a battery compartment; 16-out of the mask.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The embodiment is as follows: as shown in fig. 1-4, a detection tool for detecting live current loop and a detection method thereof.
A detection tool for live detection of a current loop, comprising:
a housing 4, the housing 4 being insulated; the measuring feet are arranged at the end part of the shell 4 and comprise a first measuring foot 13 and a second measuring foot 14 close to the first measuring foot 13; the current measuring branch 5 is arranged in the shell 4, and two ends of the current measuring branch 5 are respectively connected with the first measuring pin 13 and the second measuring pin 14, so that the current measuring branch 5 is connected with a current loop to be measured through the first measuring pin 13 and the second measuring pin 14 to form a branch circuit; the Hall sensor 6 is sleeved in the middle of the current measuring branch 5 and used for outputting voltage when current flows through the current measuring branch 5; the indicating module 8 is arranged on the shell 4, and the indicating module 8 is connected with the output end of the Hall sensor 6; and the power supply 9 is arranged in the shell 4, and the output end of the power supply 9 is connected with the Hall sensor 6. The device also comprises a voltage stabilizing module 7 arranged in the shell 4; the voltage stabilizing module 7 is connected with the output end of the power supply 9; and the indicating module 8 is connected with the Hall sensor 6 through the voltage stabilizing module 7. A button switch 10 disposed on the housing 4; and the power supply 9 is respectively connected with the voltage stabilizing module 7 and the Hall sensor 6 through a button switch 10. The sheath 2 with one open end is also included; the sheath 2 is arranged at the end of the housing 4 for covering the measuring foot inside the sheath 2. A gap 1 is arranged between the sheath 2 and the end part of the measuring foot. The distance between the first measuring pin 13 and the second measuring pin 14 is greater than the sum of the length of the first measuring pin 13 and the length of the second measuring pin 14. A battery bin 15 with one open end is arranged on the shell 4; the power supply 9 is arranged in the battery bin 15; and the detection tool for detecting the electrification of the current loop further comprises a cover plate 3 which is matched with the opening of the battery compartment 15. The current measuring branch 5 is provided with an insulating outer layer. The indicating module 8 is embedded in the shell 4; the shell 4 is provided with a light-emitting cover 16 corresponding to the indicating module 8.
Specifically, the method comprises the following steps: as shown in fig. 1, the current measuring branch 5, the hall sensor 6, the voltage stabilizing module 7, the indicating module 8, the power supply 9 and the push switch 10 are embedded inside the housing 4, and the housing 4 is insulated. The current measuring branch 5 is connected with the Hall sensor 6, the Hall sensor 6 is connected with the voltage stabilizing module 7, the voltage stabilizing module 7 is connected with the indicating module 8, the power supply 9 is connected with the button switch 10, and the button switch 10 is respectively connected with the Hall sensor 6 and the voltage stabilizing module 7. As shown in fig. 2, the hall sensor 6 comprises two parts, a measuring ring 11 and a converting part 12. As shown in fig. 3, two ends of the current measurement branch 5 are respectively connected with the first measurement pin 13 and the second measurement pin 14, the first measurement pin 13 and the second measurement pin 14 are made of bare metal, the current measurement branch 5 is provided with an insulating outer layer to prevent the current measurement branch 5 from short-circuiting, and the part of the current measurement branch 5 close to the first measurement pin 13 and the second measurement pin 14 is tightly embedded into the tool housing 4 to support the current measurement branch 5, the first measurement pin 13 and the second measurement pin 14 and prevent the first measurement pin 13 and the second measurement pin 14 from short-circuiting after being deviated. As shown in fig. 4, the current measuring branch 5 is connected to the hall sensor 6 in such a way that the current measuring branch 5 is suspended through a measuring loop 11 of the hall sensor 6. When the measuring ring 11 of the hall sensor 6 senses the magnetic field, the voltage is output from the converting part 12 to the voltage stabilizing module 7, the voltage stabilizing module 7 converts the received voltage and outputs a fixed voltage to the indicating module 8, and the indicating module 8 adopts an LED lamp and is lighted. On the contrary, if the LED lamp is not on, it is proved that the measuring ring 11 of the hall sensor 6 has no magnetic field. Sheath 2 can be when the instrument does not use, the cover is at first measurement foot 13 and the 14 front ends of second measurement foot, play the effect of the first measurement foot 13 of protection and the 14 of second measurement foot, prevent that first measurement foot 13 and second measurement foot 14 from being damaged by external force, and be provided with clearance 1 between the front end of first measurement foot 13, the front end of second measurement foot 14 and sheath 2, avoid sheath 2 to extrude first measurement foot 13, second measurement foot 14. The cover plate 3 is detachably connected to the opening of the battery bin 15, so that the power supply 9 can be replaced conveniently. The button switch 10 is used for controlling the connection of the power supply 9 with the Hall sensor 6 and the voltage stabilizing module 7, and when the detection tool is not used, the connection of the power supply 9 with the Hall sensor 6 and the voltage stabilizing module 7 is disconnected, so that the power consumption of the power supply 9 is reduced. And a light-emitting cover 16 corresponding to the indicating module 8 is arranged on the outer wall of the shell 4 and used for observing whether a detection tool for detecting the electrification of the current loop emits light or not. Sheath 2 is stereoplasm PVC sheath 2, apron 3 adopts ABS engineering plastics, casing 4 adopts silicon nitride porcelain material, current measurement branch 5 is outer insulating layer of taking, inside is the wire of copper silver alloy sinle silk, first measurement foot 13 and second measurement foot 14's length is 0.5mm, the diameter is 1mm, the interval is 1.1mm, can effectively prevent in the use, first measurement foot 13 and second measurement foot 14 bend the back short circuit and support different current terminal respectively and link the piece to cause the current circuit short circuit. The measuring range of the hall sensor 6 is 0-50mA, the output voltage value is not negative all the time, the range of the input voltage Vin of the voltage stabilizing module 7 is 0.7-5V, the output voltage Vout =5V, and the indicating module 8 is a 3mm round-head white red light emitting diode. The power supply 9 is a single cobalt-nickel battery with 5V output voltage, and the button switch 10 is a 5mm self-resetting button switch 10.
The present embodiment further provides a detection method for detecting live line of a current loop, where the detection tool for detecting live line of a current loop is used to detect live line of a current loop, and the detection method includes the following steps: connecting a first measuring pin 13 and a second measuring pin 14 to the same current terminal connecting piece; acquiring the current state of the indicating module 8, and if the indicating module 8 is in the first state, enabling current to flow through the current terminal connecting piece; if the indicator module 8 is in the second state, no current flows on the current terminal connection pad.
When the portable current loop live detection tool is used, the button switch 10 is pressed to enable the Hall sensor 6 and the voltage stabilizing module 7 to be connected with the power supply 9, after the working voltage VDD is connected, the first measuring pin 13 and the second measuring pin 14 which are connected with the current measuring branch 5 are simultaneously abutted to the same current terminal connecting piece, if the current I passes through the terminal connecting piece, the resistance of the current measuring branch 5 is smaller than that of the current connecting piece, the branch current I1 also necessarily passes through the current measuring branch 5, the branch current I1 flows through the current measuring branch 5 to generate a magnetic field B, the magnetic field B is detected by the measuring ring 11 of the Hall sensor 6, the Hall sensor 6 outputs a voltage signal Vout, the voltage signal Vout is converted by the voltage stabilizing module 7 and then outputs a fixed voltage VDC, the output voltage VDC drives the LED lamp, the LED lamp (indicating module 8) is lightened (in a first state), and the detected current connecting piece has current; on the contrary, if the LED lamp (indicating module 8) is not on (second state), it is proved that the detected current link has no current. Whether the current passes through the wiring terminal and the current loop to be measured is conveniently measured, the problem that the current loop connecting sheet in a narrow space is inconvenient to detect is solved, the tool is simple and convenient to use, the detection efficiency is high, the detection is accurate, the condition that whether the current terminal connecting sheet is electrified or not cannot be judged can be effectively avoided, the current connecting sheet is operated blindly, personnel and equipment damage is caused, fault-free tripping of a power grid is avoided, load is lost, meanwhile, because the current measurement branch 5 and the measured current terminal connecting sheet are in a parallel connection relation, the size and the direction of the current flowing in and out of the current terminal cannot be influenced during measurement operation, any influence cannot be caused on the measured current loop and relevant equipment, the safety is very high, and the tool has great significance for guaranteeing personal safety, transformer substation equipment and power grid safety.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A detection tool for live detection of a current loop, comprising:
a housing (4), said housing (4) being insulated;
the measuring foot is arranged at the end part of the shell (4) and comprises a first measuring foot (13) and a second measuring foot (14) close to the first measuring foot (13);
the current measuring branch (5) is arranged in the shell (4), and two ends of the current measuring branch (5) are respectively connected with the first measuring pin (13) and the second measuring pin (14) and used for connecting the current measuring branch (5) with a current loop to be measured through the first measuring pin (13) and the second measuring pin (14) to form a branch circuit;
the Hall sensor (6) is sleeved in the middle of the current measuring branch (5) and used for outputting voltage when current flows through the current measuring branch (5);
the indicating module (8) is arranged on the shell (4), and the indicating module (8) is connected with the output end of the Hall sensor (6);
the power supply (9), the power supply (9) is arranged in the shell (4), and the output end of the power supply (9) is connected with the Hall sensor (6).
2. A testing tool for live testing of a current loop according to claim 1, wherein:
the device also comprises a voltage stabilizing module (7) arranged in the shell (4);
the voltage stabilizing module (7) is connected with the output end of the power supply (9);
and the indicating module (8) is connected with the Hall sensor (6) through the voltage stabilizing module (7).
3. A testing tool for live testing of a current loop according to claim 2, wherein:
the button switch (10) is arranged on the shell (4);
and the power supply (9) is respectively connected with the voltage stabilizing module (7) and the Hall sensor (6) through a button switch (10).
4. A testing tool for live testing of a current loop according to claim 1, wherein:
the sheath (2) with one open end is also included;
the sheath (2) is arranged at the end part of the shell (4) and is used for buckling the measuring foot cover in the sheath (2).
5. A testing tool for live testing of a current loop according to claim 4, wherein:
a gap (1) is arranged between the sheath (2) and the end part of the measuring foot.
6. A testing tool for live testing of a current loop according to claim 1, wherein:
the distance between the first measuring pin (13) and the second measuring pin (14) is larger than the sum of the length of the first measuring pin (13) and the length of the second measuring pin (14).
7. A testing tool for live testing of a current loop according to claim 1, wherein:
a battery bin (15) with one open end is arranged on the shell (4);
the power supply (9) is arranged in the battery bin (15);
and the detection tool for detecting the electrification of the current loop further comprises a cover plate (3) matched with the opening of the battery compartment (15).
8. A testing tool for live testing of a current loop according to claim 1, wherein:
the current measuring branch (5) is provided with an insulating outer layer.
9. A testing tool for live testing of a current loop according to claim 1, wherein:
the indicating module (8) is embedded in the shell (4);
and a light emitting cover (16) corresponding to the indicating module (8) is arranged on the shell (4).
10. A detection method for current loop electrification detection, which is characterized in that the detection tool for current loop electrification detection according to any one of claims 1-9 is adopted for current loop electrification detection, and comprises the following steps:
connecting a first measuring pin (13) and a second measuring pin (14) to the same current terminal connecting piece;
acquiring the current state of the indicating module (8), and if the indicating module (8) is in the first state, enabling current to flow through the current terminal connecting piece; if the indicating module (8) is in the second state, no current flows on the current terminal connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345038.3A CN115541976A (en) | 2022-10-31 | 2022-10-31 | Detection tool for current loop live detection and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345038.3A CN115541976A (en) | 2022-10-31 | 2022-10-31 | Detection tool for current loop live detection and detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115541976A true CN115541976A (en) | 2022-12-30 |
Family
ID=84719497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211345038.3A Pending CN115541976A (en) | 2022-10-31 | 2022-10-31 | Detection tool for current loop live detection and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115541976A (en) |
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2022
- 2022-10-31 CN CN202211345038.3A patent/CN115541976A/en active Pending
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