CN215894682U

CN215894682U - Current detection caliper and current detection device

Info

Publication number: CN215894682U
Application number: CN202121447861.6U
Authority: CN
Inventors: 杨婉; 张骁; 孙晋栋; 郭晋伟
Original assignee: Beijing Taipaist Technology Development Co ltd
Current assignee: Beijing Taipaist Technology Development Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-02-22
Anticipated expiration: 2031-06-28

Abstract

The present invention relates to a current detection caliper and a current detection apparatus, the current detection caliper including: the device comprises an annular shell, a magnetic ring, a lead, a coaxial connector, a grounding card and a fixing hasp; the coaxial connector is arranged on the external cambered surface of the annular shell; the magnetic ring is arranged in the annular cavity of the annular shell; the wire is surrounded on the magnetic ring, the first end of the wire is arranged on the inner wall of the annular shell, and the second end of the wire is connected with the inner core at the first end of the coaxial connector; the second end of the coaxial connector is connected with the measuring receiver through a connecting wire; the grounding card is arranged on the inner wall of the annular shell; the fixed hasp is arranged on the outer cambered surface of the annular shell, so that the annular shell can be opened and closed, and a cable can be clamped. By adopting the technical scheme of the utility model, the current detection calipers can be directly clamped and sleeved on the cable for detection, so that the detection convenience and the detection efficiency are improved.

Description

Current detection caliper and current detection device

Technical Field

The utility model relates to the technical field of current detection, in particular to a current detection caliper and a current detection device.

Background

Electronic systems are typically comprised of multiple devices, power lines, signal lines, and control cables, which may be equivalent to loop antennas or dipole antennas, that radiate interfering signals. Both conducted and radiated interference are caused by interfering signal currents present in the cable or wire.

In order to measure the interference signal of the cable or line, it is necessary to detect the current in the cable or line, so that the measurement of the interference signal is determined to be completed according to the detected interference current. In the prior art, a current transformer is generally used, and after a large current is used for testing, the large current is analyzed by a power meter, so that the test is complex, and the current detection efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a current detection caliper and a current detection device, and aims to overcome the problems that the current detection efficiency is reduced due to complicated test caused by analysis by a power meter after a large current test in a current transformer mode commonly used in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a current sensing caliper, comprising: the device comprises an annular shell, a magnetic ring, a lead, a coaxial connector, a grounding card and a fixing hasp;

the coaxial connector is arranged on the external cambered surface of the annular shell;

the magnetic ring is arranged in the annular cavity of the annular shell;

the wire is surrounded on the magnetic ring, the first end of the wire is arranged on the inner wall of the annular shell, and the second end of the wire is connected with the inner core at the first end of the coaxial connector;

the second end of the coaxial connector is connected with the measuring receiver through a connecting wire;

the grounding card is arranged on the inner wall of the annular shell;

the fixing hasp is arranged on the outer arc surface of the annular shell, so that the annular shell can be opened and closed, and a cable can be clamped.

Further, in the above current detection caliper, the annular housing includes: the connecting assembly is connected with two symmetrical semi-annular metal cylinders with openings at two ends;

a semi-annular cavity is arranged in each semi-annular metal cylinder, and the two semi-annular cavities form an annular cavity;

the first ends of the two semi-annular metal cylinders are connected through the connecting component;

and the second ends of the two semi-annular metal cylinders are connected through the fixing hasp.

Further, in the above current detection caliper, the semi-annular metal cylinder includes: the screw and the two symmetrical semi-annular grooves;

the two semi-annular grooves are connected through the screws, so that the semi-annular cavity is formed in the semi-annular metal cylinder;

and a semi-annular open slot is formed between the inner walls of the two semi-annular grooves after the connection.

Further, in the above current detection caliper, an opening width of the semicircular open groove is 2 mm.

Further, in the above current detection caliper, the magnetic ring includes: two symmetrical half magnetic rings; the number of the leads is two;

each semi-magnetic ring is correspondingly provided with the semi-annular cavity and the lead;

the semi-magnetic ring is arranged in the semi-annular cavity;

the wires surround the corresponding semi-magnetic rings, the surrounding directions of the two wires are symmetrical, and the number of the surrounding turns of the two wires is the same.

Further, in the above current detection caliper, the number of winding turns of each of the wires is 7.

Further, in the current detection caliper, the annular shell is subjected to twice glue filling in a vacuum glue filling mode so as to fix the magnetic ring and realize insulation of the current detection caliper.

Further, in the current detection calipers, the magnetic ring is made of manganese zinc ferrite with the magnetic conductivity of 2300; the annular shell adopts a Faraday shielding shell; the coaxial connector is an N-type coaxial connector.

The present invention also provides a current detection apparatus, comprising: the connecting wire, the measuring receiver and the current detection calipers;

the current detection calipers are connected with the measurement receiver through the connecting lines;

the current detection caliper detects the current of a cable clamped in the current detection caliper and sends the current to the measurement receiver through the connecting line, so that the measurement receiver analyzes an interference signal of the cable through the current.

The current detection caliper and the current detection apparatus of the present invention, the current detection caliper includes: the device comprises an annular shell, a magnetic ring, a lead, a coaxial connector, a grounding card and a fixing hasp; the coaxial connector is arranged on the external cambered surface of the annular shell; the magnetic ring is arranged in the annular cavity of the annular shell; the wire is surrounded on the magnetic ring, the first end of the wire is arranged on the inner wall of the annular shell, and the second end of the wire is connected with the inner core at the first end of the coaxial connector; the second end of the coaxial connector is connected with the measuring receiver through a connecting wire; the grounding card is arranged on the inner wall of the annular shell; the fixed hasp is arranged on the external cambered surface of the annular shell so that the annular shell can be opened and closed, and the cable can be clamped. By adopting the technical scheme of the utility model, the current detection calipers can be directly clamped and sleeved on the cable for detection, so that the detection convenience and the detection efficiency are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model, as claimed.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a current sensing caliper according to the present invention;

FIG. 2 is another schematic structural view of the current sensing caliper of the present invention;

FIG. 3 is a schematic view of the structure of the magnetic ring and the conductive wire in the current sensing caliper of the present invention;

FIG. 4 is a schematic view of a partial internal structure of the current sensing caliper of the present invention;

fig. 5 is a block diagram showing a structure of the current detection device of the present invention.

Detailed Description

To make the objects, aspects and advantages of the present invention clearer, exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model, as detailed in the appended claims.

FIG. 1 is a schematic view of a current sensing caliper according to the present invention; FIG. 2 is another schematic structural view of the current sensing caliper of the present invention; FIG. 3 is a schematic view of the structure of the magnetic ring and the conductive wire in the current sensing caliper of the present invention; FIG. 4 is a schematic view of a partial internal structure of the current sensing caliper of the present invention. As shown in fig. 1 to 4, the current detection caliper of the present embodiment includes: annular housing 101, magnetic ring 102, wire 103, coaxial connector 104, ground clip 105 and retaining buckle 106.

The coaxial connector 104 is arranged on the outer arc surface of the annular shell 101, and the magnetic ring 102 is arranged in the annular cavity of the annular shell 101. A first end of the wire 103 is disposed on the inner wall of the annular housing 101, and then the wire 103 is wound on the magnetic ring 102 for a certain number of turns to connect a second end of the wire 103 with the inner core a of the first end of the coaxial connector 104. The second end of the coaxial connector 104 is connected to the measurement receiver by a connection line. The ground clip 105 is disposed on the inner wall of the annular housing 101. The fixing buckle 106 is arranged on the outer arc surface of the annular shell 101, and the annular shell 101 can be opened and closed by opening and fastening the fixing buckle 106. The user can clamp the cable 201 to be detected by opening the fixing buckle 106 to open the annular housing 101, closing the annular housing 101 after clamping, and then fastening the fixing buckle 106.

In this embodiment, after the current detecting caliper is clamped on the cable 201, the current detecting caliper and the cable 201 may form a transformer, the cable is used as a primary coil of the RF toroidal transformer, and a coil of the wire 103 looped around the magnetic ring 102 in the current detecting caliper is used as a secondary coil of the RF toroidal transformer, so that the coupling between the coil looped around the cable 201 and the wire 103 in the magnetic ring 102 is equivalent to the coupling between the primary coil of the RF toroidal transformer and the secondary coil of the RF toroidal transformer. In this way, the current detection caliper can detect the current in the cable 201, and then the detected current is transmitted to the measurement receiver through the connection line by the coaxial connector 104 in the current detection caliper, so that the measurement receiver can analyze the strength of the interference signal in the cable 201 according to the detected current.

The ground card 105 in this embodiment is the ground terminal that adopts card formula connected mode and annular housing 101 wall connection, adopts the ground card can increase the ground connection area to improve the sensitivity of whole test stability and current detection calliper, and the ground card is integral erection, and the installation convenience is higher.

The current detection calliper of this embodiment can direct cartridge detect on cable 201, and it is lower to compare prior art's operation complexity, has improved detection convenience and detection efficiency.

Further, the annular housing 101 of the present embodiment includes a connecting assembly 1012 and two symmetrical semi-annular metal cylinders 1011 with two open ends. Wherein, all be provided with semi-annular cavity in every semi-annular metal section of thick bamboo 1011, two semi-annular cavities have constituteed annular cavity. First ends of the two half loop metal cylinders 1011 are connected to each other by a connecting member 1012, and second ends of the two half loop metal cylinders 1011 are connected to each other by a fixing buckle 106. In this embodiment, the connecting assembly 104 is preferably a pin.

Each semi-annular metal cylinder 1011 in this embodiment includes a screw 10112 and two symmetrical semi-annular grooves 10111. The two semi-annular grooves 10111 are connected by a screw 10112, so that a semi-annular metal cylinder 1011 formed by the two semi-annular grooves 10111 forms a semi-annular cavity. The semi-annular open groove 107 is formed between the inner walls of the two semi-annular grooves 10111 after connection, therefore, each semi-annular metal cylinder 1011 can be provided with one semi-annular open groove 107, and because the two semi-annular metal cylinders 1011 are symmetrically arranged, the two semi-annular open grooves 107 are also mutually symmetrical, so that the two mutually symmetrical semi-annular open grooves 107 form an annular open groove. In this embodiment, the coupling between the cable 201 and the coil wound around the wire 103 in the magnetic ring 102 is a required path, and the annular opening slot in this embodiment is a coupling path. In this embodiment, if the opening width of the half-ring-shaped opening slot 107 is too wide, cable interference is coupled to the current detection caliper too much, and when the cable interference is conducted to the measurement receiver, the instrument is easily burnt. If the opening width of the semi-annular open slot 107 is too narrow, the coil wound by the wire 103 in the magnetic ring 102 is difficult to couple to the signal, good field effect isolation is formed due to the shielding of the annular shell 101, and the signal cannot be coupled by the current detection caliper, so that the test is difficult. Therefore, the opening width of each semi-annular open groove 107 is preferably 2 mm.

In this embodiment, the magnetic ring 102 includes two symmetrical half magnetic rings 1021, and the number of the wires 103 is two. Each semi-magnetic ring 1021 has a corresponding semi-annular cavity and a conducting wire 103, and thus each semi-magnetic ring 1021 is arranged in the corresponding semi-annular cavity. Each wire 103 encircles the corresponding semi-magnetic ring, the first end of each wire 103 is connected with the inner wall of the corresponding semi-annular metal cylinder 1011, and the second end of each wire 103 is connected with the inner core a at the first end of the coaxial connector 104, so that the parallel winding of the two wires 103 can be realized. In this embodiment, the winding directions of the two wires 103 are symmetrical, and the number of winding turns is the same, so that the magnetic reversal directions of the two coils formed by the two wires 103 are the same. In this embodiment, the same number of turns of the two wires 103 are symmetrically wound and wound in parallel to increase the magnetic flux density of the magnetic ring 102, thereby improving the sensitivity of the current detection caliper. In this embodiment, the number of winding turns of each of the two wires 103 is preferably 7. Fig. 3 shows only one conducting wire 103 wound around the semi-magnetic ring 1021 for one turn.

Further, carry out the encapsulating through the mode of vacuum encapsulating to annular casing 101 in this embodiment to this embodiment preferably adopts twice encapsulating, and the first time encapsulating adopts fixed encapsulating, can be fixed with the magnetic ring, and the second time encapsulating can increase insulating properties, improves the insulating ability of current detection calliper. The two-time glue pouring can reduce the retention of air to the maximum extent, so that the integral smoothness of the surface can be increased, and the generation of bubbles on the surface can be reduced.

Further, in this embodiment, the magnetic ring 102 is preferably made of manganese zinc ferrite with a magnetic permeability of 2300, the annular housing 101 is preferably made of a faraday shield housing, and the coaxial connector 104 is preferably made of an N-type coaxial connector.

The utility model also provides a current detection device, and fig. 5 is a structural block diagram of the current detection device of the utility model. As shown in fig. 5, the current detection apparatus of the present embodiment includes: a connecting line 32, a measurement receiver 33 and a current detection caliper 31 as described in the above embodiments. Wherein the current detection caliper 31 is connected to the measurement receiver 33 by a connection line 32.

The current detection caliper 31 detects the current of the cable clamped by the current detection caliper 31 and sends the current to the measurement receiver 33 through the connecting line 32, so that the measurement receiver 33 analyzes the interference signal of the cable through the current.

The current detection equipment of this embodiment can directly detect current detection calliper 31 card cover on the cable, has improved detection convenience and detection efficiency.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A current sensing caliper, comprising: the device comprises an annular shell, a magnetic ring, a lead, a coaxial connector, a grounding card and a fixing hasp;

the magnetic ring is arranged in the annular cavity of the annular shell;

the grounding card is arranged on the inner wall of the annular shell;

2. The current sensing caliper of claim 1, wherein the annular housing comprises: the connecting assembly is connected with two symmetrical semi-annular metal cylinders with openings at two ends;

3. The current sensing caliper according to claim 2, wherein the semi-annular metal cylinder comprises: the screw and the two symmetrical semi-annular grooves;

4. The current sensing caliper according to claim 3, wherein the opening width of the semi-annular open groove is 2 mm.

5. The current sensing caliper of claim 2, wherein the magnetic ring comprises: two symmetrical half magnetic rings; the number of the leads is two;

the semi-magnetic ring is arranged in the semi-annular cavity;

6. The current sensing caliper of claim 5, wherein each of said wires has 7 turns around.

7. The current sensing caliper of claim 1, wherein the annular housing is twice filled with vacuum to secure the magnetic ring and to provide insulation for the current sensing caliper.

8. The current sensing caliper of claim 1, wherein said magnetic ring is comprised of manganese-zinc ferrite having a permeability of 2300; the annular shell adopts a Faraday shielding shell; the coaxial connector is an N-type coaxial connector.

9. A current detection apparatus, comprising: a connecting wire, a measurement receiver and a current sensing caliper according to any one of claims 1 to 8;