CN216054201U - Low-pass filter based on anti-interference performance - Google Patents

Abstract

The utility model discloses an anti-interference low-pass filter, which aims at the problems that EMI can cause signals generated by a low-frequency filter in the working process to be coupled with signals of other electronic products around the low-frequency filter, and the generated mixed signals can cause the low-frequency filter to be misjudged during interception, so that the intercepted frequency signal range is widened; the utility model has the advantages of anti-interference and improving the signal interception accuracy.

Description

Low-pass filter based on anti-interference performance

Technical Field

The present invention relates to the field of electronic devices, and more particularly, to an anti-interference low pass filter.

Background

In an electronic circuit, the frequency band and frequency of a circuit signal directly affect the signal transmission effect in remote control, and a low-frequency filter is usually installed on a circuit PCB board, and the low-frequency filter is an electronic filtering device for intercepting a signal higher than a cut-off frequency, which allows a signal lower than the cut-off frequency to pass through, but is affected by EMI in use;

EMI is an abbreviation of electromagnetic interference, which means that an electronic product may cause interference to other electronic products around the electronic product when operating, and is a problem often encountered by electronic and electrical products, and EMI may cause signals generated by a low-frequency filter during operation to be coupled with signals of other electronic products around the low-frequency filter, and the generated mixed signals may cause the low-frequency filter to be misjudged when intercepting, thereby widening the range of intercepted frequency signals, and greatly affecting the function of the low-frequency filter, thus having an improved space.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the anti-interference low-pass filter which has the advantages of resisting interference and improving the signal interception accuracy.

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

the utility model provides a low pass filter based on interference immunity, is including the insulating bottom plate that is provided with analysis circuit, the insulating bottom plate passes through the welded connection core, the core is made by magnetic powder core material, the core is the ring shape structure and a plurality of wire of having arranged, the axial spiral cross arrangement of wire along the ring, the wire connection analysis circuit, the closed department of wire connection all is wrapped up by insulating colloid, install on the insulating bottom plate and connect analysis circuit's metal pin.

By adopting the technical scheme, in the using process of an electronic product, the insulating base plate has the advantage of not influencing the transmission of electromagnetic signals in a circuit, the insulating base plate is connected with the core body by welding, the insulating base plate and the core body form a rigid body structure in structural mechanics, the core body is of a circular ring-shaped structure and has very stable structural characteristics by the fixing mode, the magnetic powder core material is a particle-shaped material, the core body has the characteristics of low magnetic permeability and constant magnetic permeability due to the gap effect among particles, the anti-interference neutral performance is extremely excellent, the magnetic powder core material does not generate the phenomenon of gathering surface, interference signals can be better resisted, metal wires distributed on the core body are in a spiral cross arrangement mode and are wound on the core body of the circular ring-shaped structure, the generated magnetic field can be homogenized to form a stable closed magnetic field, the connecting part of the metal wires cannot form a fixed shape, and the magnetic field generated by the mode of coating insulating colloid is shielded, increase magnetic field stability, this device passes through metal pin and external circuit connection, and above-mentioned technical scheme has the advantage of anti-jamming, improvement signal interception accuracy.

Further, the metal wire includes a copper wire and a triple-layered wire.

By adopting the technical scheme, the copper wire has the conductivity second to that of silver in metal and is used as a conducting medium in electrical equipment, the three-layer wire is also called a three-layer insulated wire which is a high-performance insulated wire, can bear extremely large voltage through the specific structural shape of the insulated wire, has more stable current density flowing through the insulated wire, can form an electromagnetic field with constant regional load through the cross arrangement mode of the copper wire and the three-layer wire, has the charge distribution in the electromagnetic field which is not easily disturbed by strong external interference, and can meet the technical effect of improving the anti-interference capability of a filter.

Furthermore, the copper wire and the three layers of wires are arranged on the core body, the turns of the copper wire and the three layers of wires are consistent, and the outer part of the copper wire and the three layers of wires is coated with insulating paint.

Adopt above-mentioned technical scheme, the unanimous structure of arranging of the magnetic field homogenization with copper line and three-layer line production of the number of turns of arranging makes the electromagnetic force field that produces the same become the annular shape with the shape of core, and the insulating varnish of outside application has on the one hand to prevent that other components and parts from influencing it and can be dustproof, makes the electrified dust in the air can not be because of the magnetism adhesion on the metal wire, reaches improvement components and parts working life, promotes the stable advantage of signal.

Furthermore, be provided with the wiring piece of connecting the metal wire on the analysis circuit, the wiring piece is including connecting the nut terminal of copper line and the spring terminal of connecting the triplex line.

Adopt above-mentioned technical scheme, copper line structure because of its single material can through common nut terminal, have the advantage of practicing thrift the cost under the stable circumstances of assurance connection, the three-layer line is complicated because of its structure, and the spring terminal has the advantage of stable fixed metal wire and keep the structure indeformable of metal wire simultaneously, connects it through the spring terminal, keeps its stable with analysis circuit's being connected, has the advantage that improves connection stability.

Further, the distance that the metal pin stretches out of the analysis circuit is 5 mm.

Adopt above-mentioned technical scheme, 5mm that metal pin set up is installation distance, and the circuit board when taking place the electric current surge phenomenon, can effectual reduction electric current to the influence of wave filter, has the advantage that improves wave filter durability and life.

Further, the analysis circuit and the insulating base plate are covered with an insulating gel.

By adopting the technical scheme, the analysis circuit is provided with various small electronic components, the components are easily interfered by electromagnetic signals of other electronic components in the working process of the circuit, the filtering accuracy is influenced to a certain extent, the analysis circuit is covered by the insulating colloid to reduce the electromagnetic interference received by the analysis circuit, and the analysis circuit has the advantage of improving the filtering accuracy.

In conclusion, the utility model has the following beneficial effects:

1. the core body is made of the magnetic powder core material with better magnetic permeability, the copper wires with excellent performance and the three layers of wires are arranged on the core body to improve the anti-interference capability of the core body, the generated electromagnetic field is very stable due to the spiral cross arrangement mode of the metal wires, the electromagnetic influence on the device caused by other components in use can be effectively prevented, and the magnetic powder core has the advantages of resisting interference and improving the signal interception accuracy;

2. insulating substances are coated on the end part of the metal wire and the analysis circuit, electromagnetic fields generated by the structures of the two parts are not easy to neutralize, the electromagnetic fields generated by the parts are avoided in an insulating mode, and the influence is reduced, so that the advantage of further improving the signal interception precision is achieved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

fig. 2 is a schematic structural view of the present embodiment with the insulating colloid removed.

In the figure: 1. an insulating base plate; 11. an analysis circuit; 12. a nut terminal; 13. a spring terminal; 14. connecting blocks; 2. a metal wire; 21. three layers of wires; 22. a copper wire; 3. a core body; 4. insulating colloid; 5. and a metal pin.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

The low-pass filter based on the anti-interference performance is a device which resists electromagnetic interference generated by other electrical elements in work by making a core body from a magnetic powder core material and forming a protective magnetic field by arranging metal wires on the core body in a crossed manner so as to improve the accuracy of filtering detection.

Referring to fig. 1 and 2, the present invention provides an embodiment, which includes an insulating base plate 1 made of a silicon dioxide material, wherein the insulating base plate 1 has a rectangular structure, the thickness of the insulating base plate 1 is between 5mm and 10mm, an analyzing circuit 11 is mounted on the insulating base plate 1, a plurality of electrical components are disposed in the analyzing circuit 11, the analyzing circuit 11 has a rectangular structure, the size of the analyzing circuit 11 is smaller than that of the insulating base plate 1, a slot is formed in the middle of the analyzing circuit 11, a connecting block 14 is integrally formed in the slot and connected to the insulating base plate 1, the core 3 is connected to the connecting block 14 by welding, and the connecting block 14 separates the core 3 from the analyzing circuit 11 by a certain distance, so that the electrical components mounted in the analyzing circuit 11 can have a sufficient assembly space.

The core body 3 is made of magnetic powder core material, the magnetic powder core material is a particle type material, the size of the magnetic powder core material is between 0.5 and 5 micrometers, the material is suitable for occasions with higher frequency, because of the gap effect existing between particles, the magnetic powder core material has the characteristics of low magnetic permeability and constant magnetic permeability, the magnetic permeability of the core body 3 for receiving electromagnetic frequency is very stable, and stable filtering accuracy can be kept, the core body 3 is in a circular structure, a plurality of metal wires 2 are distributed on the core body 3, the metal wires 2 are spirally and crossly distributed along the axial direction of the circular core body 3, the metal wires 2 are connected with an analysis circuit 11, the metal wires 2 can generate an annular electromagnetic field along the periphery of the core body 3 under the condition of electric conduction due to the distribution mode, the metal wires 2 which are crossly distributed can enable all parts of the magnetic field to have uniform magnetism, the generated electromagnetic receiving frequency band is more stable, and the generated magnetic field protects the core body 3 inside, on the other hand, the filter strength of the core body 3 in a specific frequency band is increased, the magnetic field generated at the connection closed part of the metal wire 2 has the property of interfering the whole magnetic field, and the connection closed part is wrapped in the insulating colloid 4 to shield the magnetic field generated by the connection closed part, so that the influence of the part on the whole electromagnetic field is reduced. The insulating base plate 1 is provided with a metal pin 5 connected with the analysis circuit 11 on the back of the analysis circuit 11, the metal pin 5 extends along the direction vertical to the insulating base plate 1, the length of the metal pin is 5mm, and the length is set to be the length which prevents the phenomenon that the current of the connected circuit board is increased sharply and damages the core body 3 or the analysis circuit 11.

The metal wire 2 comprises a copper wire 22 and a three-layer wire 21, the copper wire 22 has good conductivity, so the copper wire 22 also has good magnetic interference resistance, the three-layer wire 21 is also called a three-layer insulated wire, the structure of the three-layer wire comprises three insulating layers and a core wire positioned in the center, the three-layer wire 21 has high insulation and large current density capable of being loaded, the three-layer wire can be matched with the copper wire 22 to be arranged to form a stacking effect of an electromagnetic field, and the formed electromagnetic field can also be matched with the core body 3 to form a detection magnetic field for improving the accuracy of filtering.

The copper wire 22 and the three-layer wire 21 are arranged on the core body 3 in the same number of turns, so that the formed magnetic field structures are consistent and can be superposed, and the exterior of the gold brush wire is coated with insulating paint to improve the anti-interference performance of the gold brush wire, so that the gold brush wire has good magnetic stability in an electronic circuit, and the anti-interference capability of the device is further improved.

The analysis circuit 11 is provided with a wiring piece for connecting the metal wire 2, the required wiring piece is different due to the property of the metal wire 2, wherein the wiring piece used for connecting the copper wire 22 is a nut terminal 12, the nut terminal 12 is a wiring piece for fixing the copper wire 22 in a mode of screwing and extruding the nut, the wiring piece has the advantages of stability, good contact and easy adjustment, the spring terminal 13 is a wiring piece for fixing the three layers of wires 21 in a mode of clamping and connecting the built-in metal sheet, the three layers of wires 21 and the copper wire 22 are fastened in the analysis circuit 11 through the wiring piece, the stability of the structure and the winding pretightening force are kept, and the analysis circuit has the advantages of simple assembly and stable structure compared with welding.

The analysis circuit 11 is also provided with a plurality of other electronic components, which also receive electromagnetic interference generated by other electronic components when in use, and as a part of the functional structure of the filter, the part reduces the influence caused by the electromagnetic interference by the mode of covering the part with the insulating colloid 4, and in order to enable the insulating colloid 4 to have a stable connection form, the coverage area of the insulating colloid 4 is increased to achieve the effect of firmer connection by the mode of covering the analysis circuit 11 and the insulating base plate 1 with the insulating colloid 4.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (6)

1. An anti-interference based low pass filter, comprising: including insulating bottom plate (1) that is provided with analytical circuit (11), welding connection core (3) are passed through in insulating bottom plate (1), core (3) are made by magnetic powder core material, core (3) are the loop configuration and a plurality of metal wires (2) have arranged, axial spiral alternately arranging of ring is followed in metal wire (2), metal wire (2) are connected analytical circuit (11), closed department is all wrapped up by insulating colloid (4) in metal wire (2) connection, install on insulating bottom plate (1) and connect metal pin (5) of analytical circuit (11).

2. The interference immunity based low pass filter of claim 1, wherein: the metal wire (2) comprises a copper wire (22) and a three-layer wire (21).

3. The interference immunity based low pass filter of claim 2, wherein: the copper wire (22) and the three-layer wire (21) are arranged on the core body (3) and are consistent in turns, and the exterior of the copper wire and the three-layer wire is coated with insulating paint.

4. The interference immunity based low pass filter of claim 2, wherein: the analysis circuit (11) is provided with a wiring piece for connecting the metal wire (2), and the wiring piece comprises a nut terminal (12) for connecting the copper wire (22) and a spring terminal (13) for connecting the three-layer wire (21).

5. The interference immunity based low pass filter of any of claims 1 to 4, wherein: the distance that metal pin (5) stretches out analysis circuit (11) is 5 mm.

6. The interference immunity based low pass filter of any of claims 1 to 4, wherein: the analysis circuit (11) and the insulating base plate (1) are covered by an insulating colloid (4).

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