CN214585934U - Weak magnetic detection equipment with shielding device - Google Patents
Weak magnetic detection equipment with shielding device Download PDFInfo
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- CN214585934U CN214585934U CN202120302322.7U CN202120302322U CN214585934U CN 214585934 U CN214585934 U CN 214585934U CN 202120302322 U CN202120302322 U CN 202120302322U CN 214585934 U CN214585934 U CN 214585934U
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Abstract
The utility model provides a weak magnetism check out test set with shield assembly for solve around ground metal interferent and make weak magnetism check out test set detect the magnetic field data emergence distortion of directly burying the pipeline to the magnetic field disturbance of directly burying the pipeline, and then influence the problem of measured data's accuracy. A non-metal material bracket is arranged in a ferromagnetic material shielding cover of the weak magnetic detection equipment provided with the shielding device, and the damping foam is arranged on the non-metal material bracket; the weak magnetic sensor is arranged in the damping foam, and the lower surface of a probe of the weak magnetic sensor is flush with the lower surface of the damping foam; the weak magnetic sensor is connected with the aviation plug, the aviation plug is arranged on the ferromagnetic material shielding cover, and an aviation plug opening is formed in the top of the ferromagnetic material shielding cover. The utility model discloses simple structure is ingenious, can shield the magnetic field disturbance of ground metal interferent alignment pipeline on every side when making the weak magnetic sensor ground detect the underground direct-burried pipeline, improves the accuracy of the magnetic field data of direct-burried pipeline.
Description
Technical Field
The utility model belongs to the technical field of the weak magnetism detects, in particular to weak magnetism check out test set with shield assembly.
Background
The static magnetic field is a steady current or a magnetic field generated by a permanent magnet. The static magnetic shield is a shield made of ferromagnetic material with high magnetic permeability mu to shield the external magnetic field. It acts similarly and differently to electrostatic shielding. The principle of magnetostatic shielding can be explained by the concept of a magnetic circuit. Since the permeability of ferromagnetic material is several thousand times greater than that of air, the reluctance of the cavity is much greater than that of ferromagnetic material, and the vast majority of the lines of magnetic induction of the external magnetic field will pass along the inside of the ferromagnetic material walls with very little magnetic flux entering the cavity. Thus, the cavity shielded by the ferromagnetic material is substantially free of an external magnetic field, thereby achieving the purpose of magnetostatic shielding. The higher the magnetic conductivity of the material is, the thicker the cylinder wall is, the more remarkable the shielding effect is. Because the shielding layer is made of ferromagnetic material with high magnetic conductivity, such as soft iron, silicon steel, permalloy, the magnetostatic shield is also called ferromagnetic shield.
When the weak magnetic detection equipment is used for detecting the underground directly-buried pipeline on the ground, the interference of ferromagnetic metal substances such as vehicles, lamp posts, fences and the like parked on the ground near a pipeline route often occurs, and the interference of the metal substances on the ground around can distort the magnetic field data of the directly-buried pipeline so as to influence the accuracy of the measured data.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the magnetic field disturbance of the ground metal interferent on the periphery to the buried pipeline makes the magnetic field data of the weak magnetic detection equipment detection buried pipeline distorted, and then influences the accuracy of the measured data, the utility model provides a weak magnetic detection equipment with shielding device, can shield the magnetic field interference of the ground metal interferent on the periphery when making the weak magnetic sensor ground detect the buried pipeline, only keep the magnetic field of perpendicular ground in the ferromagnetic material shield cover is not shielded, thereby makes the weak magnetic sensor in the ferromagnetic shield cover avoids receiving the magnetic field interference of the ferromagnetic interferent on the ground on the periphery when detecting the magnetic field of the perpendicular ground direction of the buried pipeline, and the magnetic field data of detection is more close to the magnetic field data of the real buried pipeline, improves the accuracy of the magnetic field data of the buried pipeline.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the utility model provides a weak magnetic detection device with a shielding device, which comprises a ferromagnetic material shielding cover, a non-metallic material bracket, a shock absorption foam, a weak magnetic sensor and an aviation plug; the non-metallic material bracket is arranged in the ferromagnetic material shielding cover and is fixedly connected with the ferromagnetic material shielding cover; the shock absorption foam is arranged on the non-metal material bracket; the weak magnetic sensor is arranged in the damping foam, and the lower surface of a probe of the weak magnetic sensor is flush with the lower surface of the damping foam; the weak magnetic sensor is connected with the aviation plug, the aviation plug is arranged on the ferromagnetic material shielding cover, and an aviation plug opening is formed in the top of the ferromagnetic material shielding cover.
Preferably, the ferromagnetic material shielding case is made of permalloy.
Preferably, the ferromagnetic material shielding case is hemispherical.
Preferably, the shock absorption foam is polyester foam.
Preferably, the weak magnetic sensor is a single-component weak magnetic sensor.
Preferably, the non-metallic material bracket consists of four bracket legs.
Preferably, the non-metallic material support is a plastic support.
Preferably, the non-metallic material bracket is an ABS plastic bracket.
The utility model discloses following beneficial effect has:
the utility model provides a weak magnetic check out test set with shield assembly, this embodiment provide a weak magnetic check out test set with shield assembly, shield assembly adopts hemisphere ferromagnetic material shield cover, and ferromagnetic material's magnetic permeability is several thousand times more than the magnetic permeability of air, so the magnetic resistance of cavity is much greater than ferromagnetic material's magnetic resistance, and the magnetic induction line's of outer magnetic field most will pass through along in the ferromagnetic material wall, and the magnetic flux that gets into the cavity is minimum. The cavity shielded by the ferromagnetic material is substantially free of an external magnetic field, thereby achieving the purpose of magnetostatic shielding. Therefore, the surrounding stray magnetic field is concentrated on the shell of the ferromagnetic material shielding cover, so that an ultra-low magnetic space is formed in the ferromagnetic material shielding cover, and the magnetic field interference in all directions outside the hemispherical ferromagnetic material shielding cover is shielded, so that the weak magnetic sensor in the ferromagnetic material shielding cover is prevented from being interfered by the magnetic field of ferromagnetic interferents on the surrounding ground when detecting the magnetic field of the buried pipeline in the direction vertical to the ground, the detected magnetic field data is closer to the real magnetic field data of the buried pipeline, and the accuracy of the magnetic field data of the buried pipeline is improved; the weak magnetic sensor is arranged in the damping sponge, so that the influence of vibration on the weak magnetic sensor can be eliminated; the damping sponge is arranged on the non-metal material support, and the non-metal material support is adopted to avoid magnetic field disturbance of the metal support to the buried pipeline and influence on the accuracy of the weak magnetic sensor to the magnetic field measurement of the buried pipeline; the single-component weak magnetic sensor is adopted, only the magnetic field data vertical to the ground are measured, and the accuracy of the magnetic field data of the buried pipeline is further ensured; the weak magnetic sensor is connected with the aviation plug, so that magnetic field data of the directly buried pipeline detected by the weak magnetic sensor can be uploaded to the data processing center conveniently. The utility model discloses simple structure is ingenious, can shield the magnetic field interference of ground metal interferent on every side when making weak magnetic sensor ground detect underground direct-burried pipeline magnetic field data, improves the accuracy of the magnetic field data of direct-burried pipeline.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an internal structure of a weak magnetic detection device provided with a shielding device according to an embodiment of the present invention;
fig. 2 is the embodiment of the present invention provides a schematic diagram of an external structure of a weak magnetic detection device with a shielding device.
Description of reference numerals:
1. a shield of ferromagnetic material; 2. a non-metallic material support; 3. damping foam; 4. a weak magnetic sensor; 5. an aviation plug.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment provides a weak magnetic detection device provided with a shielding device, as shown in fig. 1 and fig. 2, the weak magnetic detection device comprises a ferromagnetic material shielding cover 1, a non-metallic material bracket 2, a damping foam 3, a weak magnetic sensor 4 and an aviation plug 5; the non-metallic material bracket 2 is arranged in the ferromagnetic material shielding case 1, and the non-metallic material bracket 2 is fixedly connected with the ferromagnetic material shielding case 1; the shock absorption foam 3 is arranged on the non-metal material bracket 2; the weak magnetic sensor 4 is arranged in the damping foam 3, and the lower surface of a probe of the weak magnetic sensor 4 is flush with the lower surface of the damping foam 3; the weak magnetic sensor 4 is connected with the aviation plug 5, the aviation plug 5 is arranged on the ferromagnetic material shielding case 1, and an aviation plug opening is arranged at the top of the ferromagnetic material shielding case 1. Since the weak magnetic sensor 4 is disposed inside the shock absorbing foam 3, the portion of the weak magnetic sensor 4 disposed inside the shock absorbing foam 3 is indicated by a dotted line in fig. 1.
The ferromagnetic material shielding case 1 is made of permalloy; the ferromagnetic material shielding cover 1 is hemispherical; the shock absorption foam 3 is polyester foam; the weak magnetic sensor 4 is a single-component weak magnetic sensor; the non-metallic material bracket 2 consists of four bracket legs; the non-metal material 2 support is a plastic support, in this embodiment, an ABS plastic support.
It can be seen from the above technical solutions that, this embodiment provides a weak magnetic detection apparatus with a shielding device, where the shielding device adopts a hemispherical ferromagnetic material shielding cover, and the magnetic permeability of the ferromagnetic material is several thousand times greater than that of air, so that the magnetic resistance of the cavity is much greater than that of the ferromagnetic material, and most of the magnetic induction lines of the external magnetic field will pass through the wall of the ferromagnetic material, and the magnetic flux entering the cavity is very small. The cavity shielded by the ferromagnetic material is substantially free of an external magnetic field, thereby achieving the purpose of magnetostatic shielding. Therefore, the surrounding stray magnetic field is concentrated on the shell of the ferromagnetic material shielding case 1, so that an ultralow magnetic space is formed in the ferromagnetic material shielding case 1, and the magnetic field interference in all directions outside the hemispherical ferromagnetic material shielding case is shielded, so that the weak magnetic sensor 4 in the ferromagnetic shielding case 1 is prevented from being interfered by the magnetic field of the ferromagnetic interference objects on the surrounding ground when detecting the magnetic field of the buried pipeline in the direction vertical to the ground, the detected magnetic field data is closer to the real buried pipeline magnetic field data, and the accuracy of the buried pipeline magnetic field data is improved; the weak magnetic sensor 4 is arranged in the damping sponge 3, so that the influence of vibration on the weak magnetic sensor 4 can be eliminated; the damping sponge 3 is arranged on the non-metal material support 2, and the non-metal material support 2 is adopted to avoid magnetic field disturbance of the metal support to the buried pipeline and influence on the accuracy of the weak magnetic sensor 4 to the magnetic field measurement of the buried pipeline; the single-component weak magnetic sensor is adopted, only the magnetic field data vertical to the ground are measured, and the accuracy of the magnetic field data of the buried pipeline is further ensured; the weak magnetic sensor 4 is connected with the aviation plug 5, so that magnetic field data of the directly buried pipeline detected by the weak magnetic sensor 4 can be uploaded to the data processing center conveniently. The embodiment has simple and ingenious structure, can shield the magnetic field interference of surrounding ground metal interferents when the weak magnetic sensor detects the magnetic field data of the underground direct-buried pipeline on the ground, and improves the accuracy of the magnetic field data of the direct-buried pipeline.
The embodiments of the present invention have been described in detail through the embodiments, but the description is only exemplary of the embodiments of the present invention and should not be considered as limiting the scope of the embodiments of the present invention. The scope of protection of the embodiments of the present invention is defined by the claims. All utilize technical scheme of the embodiment of the utility model, or technical staff in the field is in the utility model discloses under embodiment technical scheme's the inspiration the utility model discloses in the essence and the protection scope of the embodiment, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change and improvement etc. that the application scope was made, all should still belong to within the protection scope is covered to the patent of the embodiment of the utility model.
Claims (8)
1. A weak magnetic detection device with a shielding device is characterized by comprising a ferromagnetic material shielding cover, a non-metallic material bracket, a damping foam, a weak magnetic sensor and an aviation plug; the non-metallic material bracket is arranged in the ferromagnetic material shielding cover and is fixedly connected with the ferromagnetic material shielding cover; the shock absorption foam is arranged on the non-metal material bracket; the weak magnetic sensor is arranged in the damping foam, and the lower surface of a probe of the weak magnetic sensor is flush with the lower surface of the damping foam; the weak magnetic sensor is connected with the aviation plug, the aviation plug is arranged on the ferromagnetic material shielding cover, and an aviation plug opening is formed in the top of the ferromagnetic material shielding cover.
2. The weak magnetic detection device provided with the shielding device according to claim 1, wherein the shielding case made of ferromagnetic material is made of permalloy.
3. The weak magnetic detection device provided with the shielding device according to claim 1, wherein the shield case of ferromagnetic material is hemispherical.
4. The weak magnetic detection device provided with the shielding device according to claim 1, wherein the shock absorbing foam is polyester foam.
5. The apparatus for detecting weak magnetism provided with shielding device according to claim 1, wherein the weak magnetic sensor is a one-component weak magnetic sensor.
6. The apparatus for detecting weak magnetism with shielding device according to claim 1, wherein said non-metallic material support is composed of four support legs.
7. The apparatus for detecting weak magnetism provided with shielding device according to claim 1, wherein the non-metallic material support is a plastic support.
8. The weak magnetic detection device provided with the shielding device according to claim 7, wherein the non-metallic material support is an ABS plastic support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120302322.7U CN214585934U (en) | 2021-02-03 | 2021-02-03 | Weak magnetic detection equipment with shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120302322.7U CN214585934U (en) | 2021-02-03 | 2021-02-03 | Weak magnetic detection equipment with shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214585934U true CN214585934U (en) | 2021-11-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120302322.7U Active CN214585934U (en) | 2021-02-03 | 2021-02-03 | Weak magnetic detection equipment with shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214585934U (en) |
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2021
- 2021-02-03 CN CN202120302322.7U patent/CN214585934U/en active Active
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