CN102944701A

CN102944701A - Wide-frequency-band current testing calipers

Info

Publication number: CN102944701A
Application number: CN2012104373933A
Authority: CN
Inventors: 宋博
Original assignee: Xi'an Kairong Electronic Technologies Co Ltd
Current assignee: Xi'an Kairong Electronic Technologies Co Ltd
Priority date: 2012-11-06
Filing date: 2012-11-06
Publication date: 2013-02-27

Abstract

The invention discloses the technical field of electronic testing and measurement and relates to a pair of wide-frequency-band current testing calipers, which at least comprise a radio-frequency connector, a caliper shell, a wound magnet core and lock catches. The wide-frequency-band current testing calipers are characterized in that the caliper shell is a circular ring structure and consists of four parts, i.e. a caliper left lower shell, a caliper left upper cover, a caliper right upper cover and a caliper right lower shell, and each part is semicircular-ring-shaped; the caliper left lower shell, the caliper left upper cover, the caliper right upper cover and the caliper right lower shell are fixedly connected through the lock catches; the wound magnet core is arranged in the caliper shell and the magnetic conductivity range is 50000 to 90000; and the radio-frequency connector is embedded in the external surface of the caliper shell. The wide-frequency-band current testing calipers have the advantages that the testing is convenient and rapid to conduct, the cable conducted emission characteristic of normal working equipment can be tested and a characteristic template for the equipment in a typical working state is generated; and the conducted transmission of the cable at typical positions can be tested and conduction source faults can be rapidly found.

Description

A kind of broadband testing current clamp

Technical field

The present invention relates to Electronic Testing and field of measuring technique, is a kind of broadband testing current clamp.

Background technology

In the electromagnetic compatibility field, the conduction emission characteristics of system plays vital effect to the Electro Magnetic Compatibility of entire system.Development along with electronic information technology; the equipment that is operated in different frequent points integrated in the system is more and more; the frequency range of the conduction emission that need to test accordingly is also more and more wider; in order to conduct transmission test to system rapidly and accurately, need a kind of broadband testing current clamp on the engineering, be bandwidth, convenient test, measuring accuracy high, can accurately test characteristics such as going out respectively common mode or differential mode Conduction Interference.

Summary of the invention

The purpose of this invention is to provide a kind of broadband testing current clamp, can in electromagnetic interference (EMI) is tested fast, in the situation that the equipment normal operation is tested fast to cable conduction emission, generate the feature templates under the equipment exemplary operation state; At the scene in the real-time working situation, cable conduction emission is tested fast, generated the test data under the real-time working state and compare the conduction emission characteristics of Preliminary detection cable with the standard masterplate; In the EMC analysis diagnosis, utilize clamp that the exemplary position of cable is carried out conduction test and realize the conduction source troubleshooting.

Technical scheme of the present invention is a kind of broadband testing current clamp, which comprises at least radio frequency connector, clamp shell, coiling magnetic core and snap close, it is characterized in that: the clamp shell is cirque structure, formed by four parts, be respectively clamp lower-left shell, clamp left upper cover, the upper right lid of clamp and clamp bottom right shell, every part all is the semicircular ring shape; Clamp lower-left shell, clamp left upper cover, the upper right lid of clamp and clamp bottom right shell are fixedly connected with by snap close; The coiling magnetic core is placed at the inside of clamp shell, and the magnetic permeability scope is 50000 to 90000; Radio frequency connector is embedded in the outside surface of clamp shell.

Described clamp shell is to be spliced to form by clamp lower-left shell, clamp left upper cover, the upper right lid of clamp and clamp bottom right shell, the material of clamp lower-left shell, clamp left upper cover, the upper right lid of clamp and clamp bottom right shell is aluminium, and the external diameter of spliced clamp shell is 80 millimeters to 105 millimeters.

Described coiling magnetic core is comprised of two semi-circular magnetic material splicings, and enameled wire is twined in the annulus magnetic core outside that is spliced to form uniformly, and its thickness is 30 millimeters to 40 millimeters, and via diameter is 30 millimeters to 40 millimeters in the spliced annulus.

The type of described radio frequency connector 1 is SMA type, N-type, BNC type or TNC type, and through coaxial cable and testing tool conducting, it is the output port of this broadband electric current clamp by radio frequency adapter for it, and the impedance operator of 50 Ω is arranged.

The test frequency range of this broadband testing current clamp is 1Hz to 300MHz.

It is quick that characteristics of the present invention are that this broadband testing current clamp have convenient test, can test normal operation equipment cable conduction emission characteristics, and the feature templates under the equipment of the generation exemplary operation state, and fast finding has the conduction source fault; Its test frequency range is 1Hz to 400MHz, and the test band limits is wide.

Description of drawings

The present invention is described further below in conjunction with specific embodiment:

Fig. 1 is a kind of external structure schematic diagram of broadband electric current clamp;

Fig. 2 is a kind of inner structure schematic diagram of broadband electric current clamp.

Among the figure: 1, radio frequency connector; 2, clamp lower-left shell; 3, clamp left upper cover; 4, snap close; 5, the upper right lid of clamp; 6, clamp bottom right shell; 7, coiling magnetic core; 8, clamp shell.

Embodiment

As depicted in figs. 1 and 2, clamp lower-left shell 2, clamp left upper cover 3, the upper right lid 5 of clamp and clamp bottom right shell 6 are hemi-toroidal shell material of aluminum, dock up and down respectively with clamp bottom right shell 6 with clamp left upper cover 3 and the upper right lid 5 of clamp by clamp lower-left shell 2, then by snap close 4 with about two semicircular ring be fixedly connected with the annular clamp shell 8 of complete.

Clamp shell 8 plays the protection inner structure, the effect that the shielding external electrical field disturbs.

Be embedded with radio frequency connector 1 on the clamp lower-left shell 2, after the splicing, radio frequency connector 1 is embedded in the outside surface of clamp shell 8.

The external diameter of spliced clamp shell 8 is 80 millimeters to 105 millimeters.

Here adopt SMA type radio frequency connector, through coaxial cable and testing tool conducting, it is the output port of broadband electric current clamp by radio frequency adapter for it, and the impedance operator of 50 Ω is arranged.

Coiling magnetic core 7 is core components of this broadband electric current clamp, it is comprised of two semi-circular magnetic material splicings, enameled wire is twined in the annulus magnetic core outside that is spliced to form uniformly, and its thickness is 30 millimeters to 40 millimeters, and via diameter is 30 millimeters to 40 millimeters in the spliced annulus.

The magnetic permeability scope of coiling magnetic core 7 is 50000 to 90000.

Coiling magnetic core 7 is arranged in the inside of annular clamp shell 8, and coiling magnetic core 7 is used for receiving the magnetic field around the variable-current on the tested cable.

During test, use snap close 4 that clamp shell 8 is fixed and clamped, located simultaneously the position of coiling magnetic core 7, reduced the air gap of coiling magnetic core 7.Then radio frequency connector 1 is received the instrument conducting by radio frequency adapter through coaxial cable and test, the signal that this broadband electric current clamp are detected transfers on the test reception instrument.

The test frequency range of this broadband test electric current clamp is 1Hz to 300MHz.

This broadband test electric current clamp can in electromagnetic interference (EMI) is tested fast, in the situation that the equipment normal operation is tested fast to cable conduction emission, generate the feature templates under the equipment exemplary operation state; At the scene in the real-time working situation, cable conduction emission is tested fast, generated the test data under the real-time working state and compare the conduction emission characteristics of Preliminary detection cable with the standard masterplate; In the EMC analysis diagnosis, utilize clamp that the exemplary position of cable is carried out conduction test and realize the conduction source troubleshooting.

The parts that the present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.

Claims

1. broadband testing current clamp, which comprises at least radio frequency connector (1), clamp shell (8), coiling magnetic core (7) and snap close (4), it is characterized in that: clamp shell (8) is cirque structure, formed by four parts, be respectively clamp lower-left shell (2), clamp left upper cover (3), the upper right lid of clamp (5) and clamp bottom right shell (6), every part all is the semicircular ring shape; Clamp lower-left shell (2), clamp left upper cover (3), the upper right lid of clamp (5) and clamp bottom right shell (6) are fixedly connected with by snap close (4); Coiling magnetic core (7) is placed at the inside of clamp shell (8), and the magnetic permeability scope is 50000 to 90000; Radio frequency connector (1) is embedded in the outside surface of clamp shell (8).

2. a kind of broadband testing current clamp described in according to claim 1, it is characterized in that: described clamp shell (8) is to be spliced to form by clamp lower-left shell (2), clamp left upper cover (3), the upper right lid of clamp (5) and clamp bottom right shell (6), the material of clamp lower-left shell (2), clamp left upper cover (3), the upper right lid of clamp (5) and clamp bottom right shell (6) is aluminium, and the external diameter of spliced clamp shell (8) is 80 millimeters to 105 millimeters.

3. a kind of broadband testing current clamp described in according to claim 1, it is characterized in that: described coiling magnetic core (7) is comprised of two semi-circular magnetic material splicings, enameled wire is twined in the annulus magnetic core outside that is spliced to form uniformly, its thickness is 30 millimeters to 40 millimeters, and via diameter is 30 millimeters to 40 millimeters in the spliced annulus.

4. a kind of broadband testing current clamp described in according to claim 1, it is characterized in that: the type of described radio frequency connector (1) is SMA type, N-type, BNC type or TNC type, it by radio frequency adapter through coaxial cable and testing tool conducting, it is the output port of this broadband electric current clamp, and the impedance operator of 50 Ω is arranged.

5. a kind of broadband testing current clamp described in according to claim 1, it is characterized in that: the test frequency range of this broadband testing current clamp is 1Hz to 400MHz.