Novel electromagnetic radiation near-field probe

Abstract

The utility model discloses a novel electromagnetic radiation near-field probe, and belongs to the technical field of electromagnetic radiation testing. Comprising an insulating rod; the radio frequency wire harness comprises a winding part, and the winding part is wound on the outer side of the insulating rod in the length direction of the insulating rod; the first end of the connecting part is connected with the winding part to form a winding rod body; and the insulating layer is coated on the outer side of the winding rod body. The beneficial effects of the above technical scheme are that by adopting the above technical scheme, the cost of the electromagnetic radiation test is reduced, the adjustment is easy, and the finding of the source of the failure frequency point is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic radiation testing, in particular to a novel electromagnetic radiation near-field probe. Background Art

[0002] With the development of society, the health problems caused by electromagnetic radiation to people have gradually received more attention, and the electromagnetic radiation standards for different regions have become more and more stringent. Therefore, the electromagnetic radiation requirements for different products are also getting higher and higher. Engineers are also paying more and more attention to the problem of excessive electromagnetic radiation during product development.

[0003] At present, the commonly used test methods mainly include making an appointment with a third-party laboratory, using a 3m field dark wave laboratory to conduct electromagnetic radiation testing, or using a near-field probe test provided by a professional test manufacturer. Among them, the former is mainly based on space and antennas to achieve the measurement of electromagnetic radiation, which is suitable for the basic test of the project and the certification test of the project delivery. This method requires a high-cost dark wave laboratory and professional antenna equipment. The test results are accurate and can be quantitatively tested, but the cost is too high; the latter mainly uses the mutual cancellation of antenna gain and space attenuation, using a smaller antenna and a closer distance to compensate for each other. The energy radiated by the product can also be observed on the spectrum analyzer, which can be used for qualitative testing to facilitate finding the source of radiation, and compared with the previous method, the cost is slightly lower, but it is not suitable for long-term radiation interference testing.

[0004] In the existing technology, the solutions of using a 3m field dark wave laboratory for electromagnetic radiation testing and using near-field probe testing provided by professional testing manufacturers both have the problem of high cost, which is not conducive to engineers adjusting electromagnetic radiation and it is difficult to find the source of the failure frequency. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of electromagnetic radiation near-field probe to solve the above technical problems;

[0006] A novel electromagnetic radiation near-field probe, comprising:

[0007] Insulating rod;

[0008] A radio frequency harness, the radio frequency harness comprising:

[0009] A winding portion, the winding portion being wound around the outer side of the insulating rod along the length direction of the insulating rod;

[0010] A connecting portion, a first end of which is connected to the winding portion to form a winding rod body;

[0011] An insulating layer is coated on the outer side of the winding rod body.

[0012] Preferably, a shielding layer is provided on the outer side of the connecting portion.

[0013] Preferably, the insulating rod is in the shape of a hollow column.

[0014] Preferably, the insulating rod is a plastic rod.

[0015] Preferably, the second end of the winding portion is connected to a BNC interface for connecting to an electromagnetic radiation spectrum analyzer.

[0016] Preferably, the insulating layer is hot melt adhesive.

[0017] Preferably, the thickness of the insulating layer is 2 mm to 3 mm.

[0018] Preferably, the number of turns of the coil on the insulating rod is 10 to 20 turns.

[0019] Preferably, the length of the insulating rod is 20 mm to 30 mm.

[0020] Preferably, the diameter of the insulating rod is 5 mm to 10 mm.

[0021] The beneficial effects of the utility model are as follows: due to the adoption of the above technical solution, the cost of electromagnetic radiation testing is reduced, adjustment is easy, and it is helpful to find the source of the failure frequency point. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the electromagnetic radiation near-field probe of the utility model;

[0023] Figure 2 It is a side view of the electromagnetic radiation near-field probe of the utility model.

[0024] In the attached figure: 1. insulating rod; 2. radio frequency harness; 21. winding part; 22. connecting part; 3. insulating layer; 4. BNC interface. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0028] A new type of electromagnetic radiation near-field probe, such as Figure 1 , Figure 2 As shown, including,

[0029] Insulating rod 1;

[0030] Radio frequency harness 2, the radio frequency harness 2 comprises:

[0031] A winding portion 21, the winding portion 21 is wound around the outer side of the insulating rod 1 along the length direction of the insulating rod 1;

[0032] A connecting portion 22, a first end of the connecting portion 22 is connected to the winding portion 21 to form a winding rod body;

[0033] The insulating layer 3 is coated on the outer side of the winding rod body.

[0034] Specifically, the utility model provides a new type of electromagnetic radiation near-field probe for electromagnetic radiation testing, which is formed by combining an insulating rod 1, a radio frequency harness 2 and an insulating layer 3. It can greatly reduce the testing cost of electromagnetic radiation, help find the source of the failed frequency point, and facilitate engineers to debug.

[0035] In a preferred embodiment, a shielding layer is provided on the outer side of the connecting portion 22 .

[0036] Specifically, a shielding layer is provided on the outside of the connecting portion 22 , but there is no shielding layer on the outside of the wiring harness of the winding portion 21 , which can enhance the received radiation energy.

[0037] In a preferred embodiment, the insulating rod 1 is in the shape of a hollow column.

[0038] Specifically, the hollow structure can reduce the interference of the detection rod itself to the electromagnetic field, making the detection result more accurate, reducing the mass of the detection rod, improving its sensitivity, and making the detection rod more sensitive to the electromagnetic field.

[0039] More specifically, the hollow insulating rod is lighter and easier to carry and operate.

[0040] In a preferred embodiment, the insulating rod 1 is a plastic rod.

[0041] Specifically, it can effectively isolate the electromagnetic interference between the circuits and components inside the electromagnetic radiation detector and the external environment, ensuring the normal operation of the detector. Plastic materials are light and have certain toughness and wear resistance, which can effectively reduce the weight of the probe, improve the convenience of carrying and operation, and also increase the service life of the probe. In addition, the cost of plastic materials is relatively low, which can reduce the manufacturing cost of electromagnetic radiation probes and make them more competitive.

[0042] In a preferred embodiment, the second end of the winding portion 21 is connected to the BNC interface 4 for connecting to an electromagnetic radiation spectrum analyzer.

[0043] Specifically, the BNC interface 4 (radio frequency coaxial connector) can establish a stable signal transmission channel between the probe and the electromagnetic radiation spectrum analyzer, thereby achieving accurate monitoring and analysis of the near field of electromagnetic radiation.

[0044] In a preferred embodiment, the insulating layer 3 is hot melt adhesive; the thickness of the insulating layer 3 is 2 mm to 3 mm.

[0045] Specifically, the detection accuracy and stability can be improved, the durability and anti-interference ability of the probe can be improved, and the service life can be extended.

[0046] In a preferred embodiment, the number of turns of the coil on the insulating rod 1 is 10 to 20 turns.

[0047] Specifically, the length of the radio frequency wire harness 2 on the insulating rod 1 can be freely selected according to the use, and can be wound several times to increase the number of coil turns, so that the generated induced electromotive force becomes larger.

[0048] In a preferred embodiment, the length of the insulating rod 1 is 20 mm to 30 mm; the diameter of the insulating rod 1 is 5 mm to 10 mm.

[0049] Specifically, it can better adapt to electromagnetic radiation signals of different frequencies and wavelengths, thereby improving detection accuracy, improving the stability and durability of the probe, extending its service life, reducing maintenance costs, making it more lightweight and portable, convenient to operate and use, and improving work efficiency.

[0050] Specifically, the present invention uses the principle of electromagnetic induction and the changing electromagnetic field to generate current in the coil to detect the changing magnetic field. The theoretical basis is that the changing magnetic field or the change in relative position will generate an induced current; in addition, since the electromagnetic radiation emitted by the product itself is relatively low, in order to increase the induced energy, the present invention adopts the method of enhancing the magnetic flux to enhance the induced radiation energy.

[0051] Therefore, it is necessary to introduce the concept of magnetic flux. The product of the area of ​​a closed circuit and the magnetic induction intensity passing through it vertically is called magnetic flux, that is, Φ, and θ is the angle between the magnetic flux lines and the plane of the coil.

[0052] Explanation of magnetic flux Φ:

[0053] Although the product of the area of ​​a closed circuit and the magnetic induction intensity passing through it perpendicularly is called magnetic flux, when the magnetic field is not perpendicular to the area of ​​the closed circuit, the magnetic induction intensity also has a component perpendicular to the closed circuit and a component of the magnetic induction intensity perpendicular to the area of ​​the closed circuit.

[0054] According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the magnetic flux passing through the circuit. The magnitude of the induced electromotive force is proportional to the rate of change of the magnetic flux. Therefore, in order to enhance the rate of change of the magnetic flux, the magnetic flux can be increased to increase the amount of change of the magnetic flux per unit time. Since the area is relatively fixed, the utility model adopts the method of increasing the number of coil turns to achieve the purpose.

[0055] More specifically, the method for finding the failure frequency is as follows:

[0056] Place the electromagnetic radiation near-field probe close to the device circuit board, adjust the angle between the probe and the circuit board, and scan back and forth on the circuit board to find the place with the largest failure frequency. This will determine the source of the failure frequency and help engineers reduce the energy of the failure frequency at the source or propagation path.

[0057] In summary, the present application provides a new type of electromagnetic radiation near-field probe for electromagnetic radiation testing. Through the electromagnetic radiation near-field probe, the cost is further reduced. Starting from the basic principle of space radiation, lower-cost testing is achieved, which is easy to adjust and helps to find the source of the failed frequency.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel electromagnetic radiation near-field probe, characterized in that: include, Insulating rod (1); A radio frequency harness (2), the radio frequency harness (2) comprising: A winding portion (21), the winding portion (21) being wound around the outer side of the insulating rod (1) along the length direction of the insulating rod (1); A connecting portion (22), wherein a first end of the connecting portion (22) is connected to the winding portion (21) to form a winding rod body; An insulating layer (3), the insulating layer (3) covering the outer side of the winding rod body.

2. The novel electromagnetic radiation near-field probe according to claim 1 is characterized in that: A shielding layer is provided on the outer side of the connecting portion (22).

3. The novel electromagnetic radiation near-field probe according to claim 1 is characterized in that: The insulating rod (1) is in the shape of a hollow column.

4. The novel electromagnetic radiation near-field probe according to claim 3 is characterized in that: The insulating rod (1) is a plastic rod.

5. The novel electromagnetic radiation near-field probe according to claim 1 is characterized in that: The second end of the winding portion (21) is connected to a BNC interface (4) for connecting to an electromagnetic radiation spectrum analyzer.

6. The novel electromagnetic radiation near-field probe according to claim 1 is characterized in that: The insulating layer (3) is hot melt adhesive.

7. The novel electromagnetic radiation near-field probe according to claim 6 is characterized in that: The thickness of the insulating layer (3) is 2 mm to 3 mm.

8. The novel electromagnetic radiation near-field probe according to claim 4 is characterized in that: The number of turns of the coil on the insulating rod (1) is 10 to 20 turns.

9. The novel electromagnetic radiation near-field probe according to claim 8, characterized in that: The length of the insulating rod (1) is 20 mm to 30 mm.

10. The novel electromagnetic radiation near-field probe according to claim 9, characterized in that: The diameter of the insulating rod (1) is 5 mm to 10 mm.

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