CN102944781A

CN102944781A - Miniaturized current test caliper

Info

Publication number: CN102944781A
Application number: CN2012104376984A
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 relates to the technical fields of electronic test and measurement, in particular to a miniaturized current test caliper. The miniaturized current test caliper at least comprises a radio frequency connector, a caliper casing, a winding magnetic core and lock catches. The miniaturized current test caliper is characterized in that the caliper casing is in a circular structure and consists of four parts, namely a caliper lower-left casing, a caliper upper-left cover, a caliper upper-right cover and a caliper lower-right casing; each part is semicircular; the caliper lower-left casing, the caliper upper-left cover, the caliper upper-right cover and the caliper lower-right casing are fixedly connected by the lock catches; the winding magnetic core is arranged inside the caliper casing; the magnetic conductivity ranges from 20,000 to 40,000; and the radio frequency connector is internally embedded in the outer surface of the caliper casing. The miniaturized current test caliper is convenient and quick in test and can be used for testing the conducting and transmitting characteristics of equipment cables which normally work and generating a feature template of the equipment in a typical work state; and the conduction and the transmitting of the cables at typical positions are tested and faults of a conduction source are quickly found out.

Description

A kind of miniaturization testing current clamp

Technical field

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

Background technology

In the electromagnetic compatibility field, anti-electromagnetic interference performance for product requires more and more higher, the radiation-emitting of electric room is no doubt important for the impact of system performance, but the conduction of equipment room emission also should not be underestimated on the impact of system, in order to determine rapidly and accurately the conduction emission between the equipment, need a kind of miniaturization testing current clamp on the engineering, namely volume is little, convenient test, the measuring accuracy high.

Summary of the invention

The purpose of this invention is to provide a kind of miniaturization testing current clamp, can in electromagnetic interference (EMI) is tested fast, in the situation of equipment normal operation, cable conduction emission be tested fast, 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 miniaturization 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 20000 to 40000; 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 70 millimeters to 80 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 15 millimeters to 20 millimeters, and via diameter is 25 millimeters to 30 millimeters in the spliced annulus.

The type of described radio frequency connector 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 miniaturization testing current clamp is 1Hz to 200MHz.

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 200MHz, although the test band limits is wide not, the clamp integral diameter is less than 10 centimetres, and thin thickness is lightweight, is easy to carry.

Description of drawings

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

Fig. 1 is a kind of external structure synoptic diagram of miniaturization testing current clamp.

Fig. 2 is a kind of inner structure synoptic diagram of miniaturization testing 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 70 millimeters to 80 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 15 millimeters to 20 millimeters, and via diameter is 25 millimeters to 30 millimeters in the spliced annulus.

The magnetic permeability scope of coiling magnetic core 7 is 20000 to 40000.

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 miniaturization testing current clamp are detected transfers on the test reception instrument.

This miniaturization testing current clamp can in the situation of equipment normal operation, be tested cable conduction emission in electromagnetic interference (EMI) is tested fast fast, 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 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. miniaturization 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 20000 to 40000; Radio frequency connector (1) is embedded in the outside surface of clamp shell (8).

2. a kind of miniaturization 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 70 millimeters to 80 millimeters.

3. a kind of miniaturization 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 15 millimeters to 20 millimeters, and via diameter is 25 millimeters to 30 millimeters in the spliced annulus.

4. a kind of miniaturization 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 miniaturization testing current clamp described in according to claim 1, it is characterized in that: the test frequency range of this miniaturization testing current clamp is 1Hz to 200MHz.