Portable magnetic field intensity tester

Abstract

The utility model belongs to the technical field of magnetic field testing, and discloses a portable magnetic field intensity tester which comprises a testing box, the testing box comprises an upper cover and a lower cover, the upper cover and the lower cover are connected through a snap fastener structure, a circuit board is arranged in the lower cover, a plurality of first Hall sensors are arranged on the periphery of the circuit board, and a plurality of second Hall sensors are arranged on the periphery of the circuit board. The first Hall sensor is used for collecting magnetic field signals, and a display screen is embedded in the upper cover. The device has the advantages of high test convenience, high practicability, good man-machine interaction and the like.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic field testing technology, specifically relating to a portable magnetic field strength tester. Background Technology

[0002] Strong magnetic fields can be used to completely destroy data stored on magnetic storage media such as hard disks, magnetic tapes, and magnetic cards. The working principle is to generate a strong instantaneous magnetic field to completely remove the directional marking signals on the magnetic storage media, causing it to lose its data representation ability, thereby destroying the recorded data.

[0003] A magnetic field strength testing instrument for strong magnetic fields is used to measure the intensity of the demagnetizing field at six fixed points within the effective demagnetizing region of a strong magnetic field. Currently, the main instrument for magnetic field strength testing is a fluxmeter, consisting of a main body and a separate probe. The main body is placed outside the magnetic field, while the separate probe extends into the field. To determine the demagnetizing intensity within a strong magnetic field, it is necessary to test the magnetic field strength at six fixed points within the effective demagnetizing region.

[0004] The demagnetizing area of ​​a strong magnetic field is usually sealed, requiring the disassembly of some structural components to insert the split probe into the effective demagnetizing area. Furthermore, multiple tests are required to complete the testing of the magnetic field strength at six fixed points. Therefore, existing strong magnetic field testing instruments suffer from drawbacks such as poor convenience and cumbersome testing procedures. Utility Model Content

[0005] The purpose of this invention is to provide a portable magnetic field strength tester to solve the problems of poor convenience and cumbersome testing of existing strong magnetic field testing instruments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a portable magnetic field strength tester, including a test box. The test box includes an upper cover and a lower cover, which are connected by a snap-fit ​​structure. A circuit board is provided inside the lower cover, and several first Hall sensors are deployed around the circuit board. The first Hall sensors are used to collect magnetic field signals. A display screen is embedded on the upper cover.

[0008] Preferably, the display screen is a touch screen.

[0009] Preferably, the test box is 3.5 inches in size.

[0010] Preferably, a second Hall sensor is deployed in the middle of the circuit board, and the second Hall sensor is arranged at an angle.

[0011] Preferably, the tilt angle of the second Hall sensor is 45°.

[0012] Preferably, the inner side of the top cover is provided with a battery pack and a battery clamping plate, the two ends of the battery clamping plate are detachably connected to the inner side of the top cover, and the battery pack is pressed tightly onto the inner side of the top cover by the battery clamping plate.

[0013] Preferably, a charging interface is provided on one side wall of the top cover.

[0014] Preferably, a toggle switch is provided on the side wall of the top cover located on the same side as the charging interface, and the two switch contacts of the toggle switch are connected in series in the power supply circuit on the output side of the battery pack.

[0015] Preferably, a boost module is connected in series in the power supply circuit of the battery pack, and the boost module is fixed on the inner side of the top cover.

[0016] Beneficial effects:

[0017] 1. The circuit board inside the test box of this utility model is equipped with multiple first Hall sensors, which can test the magnetic field strength at multiple fixed points without having to test each point sequentially, thus simplifying the test operation and improving the convenience of magnetic field strength testing.

[0018] 2. This utility model integrates the display screen, circuit board and first Hall sensor into the test box. The test box is compact and can be directly placed in a strong magnetic field environment, which further improves the convenience of testing.

[0019] 3. The display screen of this utility model can display the tested magnetic field strength in real time, giving the tester good human-computer interaction.

[0020] 4. The upper and lower covers of the test box of this utility model are connected by a snap-fit ​​structure, which facilitates the disassembly and assembly of the upper and lower covers and is beneficial for the maintenance of the internal components of the test box in the future. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall appearance of a portable magnetic field strength tester provided in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the assembly of the first Hall sensor and circuit board inside the lower cover according to one embodiment of the present invention;

[0024] Figure 3This is an assembly diagram of the components inside the top cover provided in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the deployment of the second Hall sensor on a circuit board according to one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Top cover; 2. Bottom cover; 3. Circuit board; 4. First Hall sensor; 5. Display screen; 6. Second Hall sensor; 7. Battery pack; 8. Battery clamp; 9. Charging interface; 10. Toggle switch; 11. Boost module. Detailed Implementation

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0029] Figure 1 This is a schematic diagram of the overall appearance of a portable magnetic field strength tester provided in one embodiment of this utility model. Figure 1 As shown, this embodiment provides a portable magnetic field strength tester, including a test box. The test box includes an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 are connected by a snap-fit ​​structure, wherein the snap-fit ​​structure includes a male snap and a female snap. The male snap is installed on the upper cover 1 and the female snap is installed on the lower cover 2; or the male snap is installed on the lower cover 2 and the female snap is installed on the upper cover 1. The male snap and the female snap are connected by an interference fit, thereby realizing the installation connection between the upper cover 1 and the lower cover 2. The snap-fit ​​structure facilitates the disassembly and assembly of the upper cover 1 and the lower cover 2, which is beneficial for the maintenance of the internal components of the test box.

[0030] The lower cover 2 contains a circuit board 3, which is installed inside the lower cover 2 by screws. Several first Hall sensors 4 are deployed around the circuit board 3. These first Hall sensors 4 are used to collect magnetic field signals, such as... Figure 2As shown, there are 12 first Hall sensors 4, with 3 arranged on each side horizontally and 3 arranged on each side vertically. Among the 12 first Hall sensors 4, 2 are deployed at each of the four corners of the circuit board 3, and the angles at which the 2 Hall sensors at each corner receive the magnetic field signal are perpendicular to each other. The 3 first Hall sensors 4 on each side of the circuit board 3 are used to receive signals from different magnetic field directions. The arrangement of 12 first Hall sensors 4 can simultaneously test the magnetic field strength at 6 fixed points without having to test each point sequentially, simplifying the testing operation and improving the convenience of magnetic field strength testing.

[0031] The upper cover 1 is equipped with a display screen 5, which can display the tested magnetic field strength in real time, giving the tester good human-computer interaction.

[0032] This invention integrates the display screen 5, circuit board 3, and first Hall sensor 4 into a test box. The test box is compact and can be directly placed in a strong magnetic field environment, further improving the convenience of testing.

[0033] As a further optimization of this embodiment, the display screen 5 is a touch screen, and the circuit board 3 integrates a memory that can store relevant data during the test. The display screen 5 has a touch function and can be set to view historical data. Therefore, after the test is completed, the relevant historical data of the entire test process can be viewed through touch operation without exporting the data, which improves the practicality and convenience of the tester.

[0034] As a further optimization of this embodiment, the test box is 3.5 inches in size. Since the demagnetizing target of the strong magnetic field is mainly the hard disk, and the through-hole size of the hard disk is 3.5 inches, that is, 147mm×102mm×26mm; at this time, the size of the test box is the same as the size of the hard disk, with an error of no more than 1mm. The test box can be directly placed into the strong magnetic field without disassembling part of the strong magnetic field structure, which improves the convenience of the test operation; at the same time, it is convenient to carry the magnetic field strength tester.

[0035] As a further optimization of this embodiment, such as Figure 4 As shown, a second Hall sensor 6 is deployed in the middle of the circuit board 3. The second Hall sensor 6 is arranged at an angle. In this embodiment, the tilt angle of the second Hall sensor 6 is 45°. Since any first Hall sensor 4 is parallel to the side of the circuit board 3, and the acute angle between the second Hall sensor 6 and the side of the circuit board 3 is 45°, the second Hall sensor 6 can capture negative pulses and indicate whether the magnetic field strength tester is placed in the wrong direction.

[0036] As a further optimization of this embodiment, such as Figure 3 As shown, the inner side of the upper cover 1 is provided with a battery pack 7 and a battery clamping plate 8. The two ends of the battery clamping plate 8 are detachably connected to the inner side of the upper cover 1. The battery pack 7 is pressed against the inner side of the upper cover 1 by the battery clamping plate 8. In this embodiment, the battery pack 7 can provide working power to the circuit board 3. The battery pack 7 is a soft pack, while the battery clamping plate 8 is made of nylon material, which has a certain elasticity and toughness and can protect the battery pack 7. The two ends of the battery clamping plate 8 are connected to the upper cover 1 by screws.

[0037] As a further optimization of this embodiment, such as Figure 3 As shown, a charging interface 9 is provided on one side wall of the upper cover 1. The charging interface 9 adopts a Type-C interface and is electrically connected to the battery pack 7, which can charge the battery pack 7 and replenish its power.

[0038] As a further optimization of this embodiment, a toggle switch 10 is provided on the side wall of the top cover 1 on the same side as the charging interface 9. The two switch contacts of the toggle switch 10 are connected in series in the power supply circuit on the output side of the battery pack 7. The power supply circuit on the output side of the battery pack 7 is the circuit between the battery pack 7 and the circuit board 3. The toggle switch 10 can cut off the power supply from the battery pack 7 to the circuit board 3 or enable the battery pack 7 to supply power to the circuit board 3. That is, the toggle switch is used to control the start and stop of the magnetic field strength tester.

[0039] As a further optimization of this embodiment, a boost module 11 is connected in series in the power supply circuit of the battery pack 7. The boost module 11 is fixed on the inner side of the upper cover 1. The boost module 11 includes various voltage conversion chips. For example, if the voltage of the battery pack 7 is 5V, the voltage conversion chips include 5V-3.3V conversion chips, 5V-12V conversion chips, and 5V-3V conversion chips. At this time, the boost module 11 can output various voltage levels, such as 5V, 3.3V, 3V, and 12V, which can provide working power for different electronic devices.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A portable magnetic field strength tester, characterized in that, The test box includes an upper cover (1) and a lower cover (2). The upper cover (1) and the lower cover (2) are connected by a snap fastener structure. A circuit board (3) is provided inside the lower cover (2). Several first Hall sensors (4) are deployed around the circuit board (3). The first Hall sensors (4) are used to collect magnetic field signals. A display screen (5) is embedded on the upper cover (1).

2. The portable magnetic field strength tester according to claim 1, characterized in that, The display screen (5) is a touch screen.

3. The portable magnetic field strength tester according to claim 1, characterized in that, The test box measures 3.5 inches.

4. The portable magnetic field strength tester according to claim 1, characterized in that, A second Hall sensor (6) is deployed in the middle of the circuit board (3), and the second Hall sensor (6) is arranged at an angle.

5. The portable magnetic field strength tester according to claim 4, characterized in that, The tilt angle of the second Hall sensor (6) is 45°.

6. The portable magnetic field strength tester according to claim 1, characterized in that, The inner side of the top cover (1) is provided with a battery pack (7) and a battery pressure plate (8). The two ends of the battery pressure plate (8) are detachably connected to the inner side of the top cover (1). The battery pack (7) is pressed onto the inner side of the top cover (1) by the battery pressure plate (8).

7. The portable magnetic field strength tester according to claim 6, characterized in that, A charging port (9) is provided on one side wall of the top cover (1).

8. The portable magnetic field strength tester according to claim 7, characterized in that, A toggle switch (10) is provided on the side wall of the top cover (1) on the same side as the charging interface (9). The two switch contacts of the toggle switch (10) are connected in series in the power supply circuit on the output side of the battery pack (7).

9. The portable magnetic field strength tester according to claim 8, characterized in that, A boost module (11) is connected in series in the power supply circuit of the battery pack (7), and the boost module (11) is fixed on the inner side of the top cover (1).

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