CN214953858U

CN214953858U - Near field probe suitable for PCB walks line

Info

Publication number: CN214953858U
Application number: CN202121319031.5U
Authority: CN
Inventors: 练国辉; 张安明
Original assignee: Guangzhou Shuntai Quality Technical Service Co ltd
Current assignee: Guangzhou Shuntai Quality Technical Service Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-11-30
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses a near field probe suitable for PCB walks line, the electric iron comprises a handle, the front end of handle is connected with the detection portion, and the rear end is connected with output joint, be equipped with the detection cable in the handle, the one end and the output joint of detection cable are connected, and the other end extends to the detection portion and extends again after coiling in the detection portion and be connected with output joint in extending the handle. The utility model provides a near field probe suitable for PCB walks line has solved the contradiction between probe size and the sensitivity of receiving among the prior art, under the prerequisite that does not use any external signal amplifier, through the structure that changes the detection portion to reduce the physical dimension of detection portion, improve and survey the resolution ratio, increased sensitivity of receiving simultaneously, and be certain contained angle between detection portion and the handle, accord with human engineering and use custom more.

Description

Near field probe suitable for PCB walks line

Technical Field

The utility model relates to an electromagnetic compatibility technical field specifically is a near field probe suitable for PCB walks line.

Background

The EMI near-field probe for electromagnetic compatibility rectification and debugging has the functions of an antenna for near-field receiving, is used for receiving electromagnetic field signals of a near field, and when a field propagation line is vertical to the ring surface of the probe, the field induced by the probe is the maximum value, and then the electromagnetic field signals are transmitted to a frequency spectrograph through a coaxial cable for analyzing the frequency spectrum distribution or qualitative measurement of the signals. The near field probes in the market are various in types and models, and are generally divided into two categories, namely a magnetic field and an electric field according to the use frequency, and the electric field is designed into a loop antenna or a rod antenna with one size according to different frequencies.

In the positioning and debugging process of the electromagnetic interference noise of the PCB level, the size, the resolution and the sensitivity of the existing antenna can not meet the actual use requirement. At present of high integration of electronic circuits, the number of laminated PCBs of electronic products is more and more, the size is smaller and smaller, the wiring is more and more dense, and the size of a near-field probe suitable for the PCBs is smaller and smaller. The larger the diameter of the annular near-field probe is, the lower the detection resolution of the probe to an electromagnetic field is, and the lower the discrimination of EMI noise interference generated by complex wiring is, so that the probe cannot accurately position the direction and energy distribution of the electromagnetic field. The rod-shaped near-field probe has small probe size, but is not favorable for small-signal detection due to small antenna induction area, poor receiving sensitivity, poor directivity, poor low-frequency performance and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that above-mentioned prior art exists, provide a near field probe suitable for PCB walks the line. In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a near field probe suitable for PCB walks line, includes the handle, the front end of handle is connected with the detection portion, and the rear end is connected with the output and connects, be equipped with the detection cable in the handle, the one end and the output of detection cable connect, and the other end extends to the detection portion and extends again after coiling in the detection portion and be connected with the output after the handle.

Further, the ends of the probe cable are coiled in the probe section along a plurality of concentric rings to form a plurality of probe receiving loops.

Furthermore, the number of the probe receiving rings is 4-6.

Further, the number of the probe receiving rings is 4.

Further, the detection cable is a coaxial cable, and an inner conductor of the coaxial cable is coiled in the detection part and extends to form a probe receiving ring and then extends into the handle to be connected with the output connector.

Further, the maximum diameter of the probe receiving ring is 10-12 mm.

Furthermore, the inner conductor is made of silver-plated copper wires and has a diameter of 0.6-0.8 mm.

Furthermore, the included angle alpha between the handle and the detection part is more than or equal to 125 degrees and less than or equal to 135 degrees.

Further, an insulating material layer is arranged between the adjacent probe receiving rings.

The utility model has the advantages that:

the utility model provides a near field probe suitable for PCB walks line has solved the contradiction between probe size and the sensitivity of receiving among the prior art, under the prerequisite that does not use any external signal amplifier, through the structure that changes the detection portion to reduce the physical dimension of detection portion, improve and survey the resolution ratio, increased sensitivity of receiving simultaneously, and be certain contained angle between detection portion and the handle, accord with human engineering and use custom more.

Drawings

Fig. 1 is a schematic structural view of a near field probe suitable for PCB routing of the present invention;

figure 2 is the utility model discloses a near field probe's perspective of PCB line.

In the figure: 1-handle, 2-detecting part, 3-output connector, 4-detecting cable, 5-probe receiving ring and 6-insulating material layer.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of 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 thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Please refer to fig. 1-2, which is a schematic diagram of the present invention, the near field probe suitable for PCB trace comprises a handle 1, the front end of the handle 1 is connected with a detection part 2, the rear end is connected with an output connector 3, a detection cable 4 is arranged in the handle 1, one end of the detection cable 4 is connected with the output connector 3, and the other end extends to the detection part 2 and extends to the handle 1 again after coiling in the detection part 2 to be connected with the output connector 3.

Specifically, the handle 1 is connected with the detecting part 2, both of which are made of insulating materials, and the included angle alpha between the handle and the detecting part 2 is more than or equal to 125 degrees and less than or equal to 135 degrees, preferably 135 degrees. Because the two form a certain included angle, the use is more convenient and comfortable.

The detection cable 4 is a coaxial cable, the coaxial cable is arranged in the handle 1, one end of an inner conductor of the coaxial cable is connected with the output connector 3, and the other end of the inner conductor extends into the detection part 2, is coiled and extends to form a probe receiving ring 5, and then extends into the handle 1 again to be connected with the output connector 3.

It should be noted that when the other end extends into the handle 1 again, the insulation layer inside the detection cable 4 can isolate the overlapped part of the inner conductors, so as to realize mutual shielding and avoid electromagnetic interference. An insulating material layer 6 is arranged between the adjacent probe receiving rings 5, and the insulating material layer 6 isolates the adjacent probe receiving rings 5, so that the electromagnetic interference is avoided.

The inner conductor of the detection cable 4 is made of silver-plated copper wires, the diameter of the silver-plated copper wires is 0.6-0.8mm, the preferred diameter of the silver-plated copper wires is 0.6mm, and the detection effect is better.

The ends of the probe cable 4 are coiled in the probe portion 2 along a plurality of concentric ring extensions to form a plurality of probe receiving loops 5. That is, the inner conductor is coiled into a plurality of concentric probe receiving rings 5 which are sequentially communicated, so that the sensitivity of detection is improved, and the size of the detection part 2 is reduced.

The number of the probe receiving rings 5 is 4-6, the preferred number is 4, the size is smaller, the use is convenient, and the detection requirement can be met. The maximum diameter of the probe receiving ring 5 is 10-12mm, preferably 10 mm.

The working principle is as follows:

during the use, at first connect output connector 3 and the spectrometer, be close to the PCB board that awaits measuring with detecting part 2 after that, the electromagnetic signal of detecting part 2 response PCB board to with this signal transmission for the frequency spectrograph, the frequency spectrograph carries out the analysis to the signal, can obtain the spectral distribution or the qualitative measurement of signal.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a near field probe suitable for PCB walks line which characterized in that: including handle (1), the front end of handle (1) is connected with detection portion (2), and the rear end is connected with output joint (3), be equipped with in handle (1) and survey cable (4), the one end and the output joint (3) of surveying cable (4) are connected, and the other end extends to detection portion (2) and extends to again extend to handle (1) after the dish is bent in detection portion (2) and be connected with output joint (3).

2. The near field probe suitable for PCB routing of claim 1, wherein: the ends of the probe cable (4) are coiled in the probe section (2) along a plurality of concentric ring extensions to form a plurality of probe receiving rings (5).

3. The near field probe suitable for PCB routing of claim 2, wherein: the number of the probe receiving rings (5) is 4-6.

4. The near field probe suitable for PCB routing of claim 3, wherein: the number of the probe receiving rings (5) is 4.

5. A near field probe suitable for PCB routing according to any one of claims 1 to 4, wherein: the detection cable (4) is a coaxial cable, and an inner conductor of the coaxial cable is coiled and extended in the detection part (2) to form a probe receiving ring (5) and then extends into the handle (1) to be connected with the output connector (3).

6. The near field probe suitable for PCB routing of claim 5, wherein: the maximum diameter of the probe receiving ring (5) is 10-12 mm.

7. The near field probe suitable for PCB routing of claim 6, wherein: the inner conductor is made of silver-plated copper wires and has a diameter of 0.6-0.8 mm.

8. The near field probe for PCB routing of claim 7, wherein: the included angle alpha between the handle (1) and the detection part (2) is more than or equal to 125 degrees and less than or equal to 135 degrees.

9. The near field probe for PCB routing of claim 8, wherein: and an insulating material layer (6) is arranged between every two adjacent probe receiving rings (5).