Intelligent direct current voltmeter based on single-chip microcomputer

Abstract

The utility model belongs to the technical field of intelligent direct current voltmeters, and particularly relates to an intelligent direct current voltmeter based on a single-chip microcomputer, which comprises an intelligent direct current voltmeter main body, a circuit board is assembled in the intelligent direct current voltmeter main body, the circuit board is electrically connected with a single-chip microcomputer unit, and the single-chip microcomputer unit is electrically connected with a wiring harness group. The circuit board is fixedly connected with a shielding case covering the outer side of the single-chip microcomputer unit, a wiring harness groove is formed in one side of the shielding case, the wiring harness set extends to the outer side of the shielding case through the wiring harness groove, a deformable shielding strip is arranged on the outer side of the shielding case and located on the front side of the wiring harness groove, and a pressing strip set is assembled on the outer side of the shielding case and located on the outer side of the deformable shielding strip. The deformable shielding strip comprises a latex sleeve, and the latex sleeve is filled with shielding powder. According to the utility model, the gaps of the shielding case can be effectively reduced, the shielding performance of the shielding case is improved, and the electromagnetic interference on the single-chip microcomputer of the intelligent direct current voltmeter during use is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of intelligent DC voltmeters, and specifically relates to an intelligent DC voltmeter based on a single-chip microcomputer. Background Technique

[0002] In modern electronic devices, intelligent DC voltmeters based on single-chip microcomputers have a wide range of applications. They combine single-chip microcomputer technology and circuit design to provide high-precision and intelligent solutions for voltage measurement. The intelligent DC voltmeter can achieve functions such as accurate voltage measurement, data processing, display, and communication through single-chip microcomputer control.

[0003] Although intelligent DC voltmeters based on single-chip microcomputers have many advantages in voltage measurement, in actual use, the single-chip microcomputer is often affected by electromagnetic interference, which may lead to problems such as inaccurate measurement data and unstable operation of the device. To protect the single-chip microcomputer from electromagnetic interference, an electromagnetic shielding cover is usually used for protection.

[0004] However, when the existing electromagnetic shielding cover encloses the single-chip microcomputer, in order to extend the wire harness of the single-chip microcomputer, gaps are often generated. These gaps may lead to a decrease in the shielding performance of the shielding cover. Content of the Utility Model

[0005] The purpose of this utility model is to provide an intelligent DC voltmeter based on a single-chip microcomputer, which can effectively reduce the gaps in the shielding cover, improve the shielding performance of the shielding cover, and reduce the electromagnetic interference received by the single-chip microcomputer of the intelligent DC voltmeter during use.

[0006] The technical solutions adopted by this utility model are specifically as follows:

[0007] An intelligent DC voltmeter based on a single-chip microcomputer, including the main body of the intelligent DC voltmeter. A circuit board is assembled inside the main body of the intelligent DC voltmeter. A single-chip microcomputer unit is electrically connected to the circuit board. A wire harness group is electrically connected to the single-chip microcomputer unit. A shielding cover covering the outside of the single-chip microcomputer unit is fixedly connected to the circuit board. A wire harness groove is opened on one side of the shielding cover. The wire harness group extends to the outside of the shielding cover through the wire harness groove. A deformable shielding strip is arranged on the outside of the shielding cover and in front of the wire harness groove. A pressing strip group is assembled on the outside of the shielding cover and outside the deformable shielding strip.

[0008] Further, the deformable shielding strip includes a latex sleeve, and shielding powder is filled inside the latex sleeve.

[0009] Further, the material of the shielding powder is any one of copper, iron, and aluminum.

[0010] Further, the pressing strip group includes two edge pressing plates with adjustable spacing. At one end of each of the two edge pressing plates away from each other, a side pressing plate is fixedly connected. The edge pressing plates and the side pressing plates are arranged in an L shape.

[0011] Further, a center pressing plate is arranged below the two edge pressing plates.

[0012] Further, a center connecting plate is fixedly connected to the middle position on the upper side of the center pressing plate. A rotating rod is rotatably connected to the center connecting plate. At one end of each of the two edge pressing plates close to each other, a side connecting plate is fixedly connected. Two threaded rods are fixedly connected to the rotating rod. The two threaded rods are symmetrically arranged. The two threaded rods are respectively threadedly connected to the two side connecting plates.

[0013] The technical effects obtained by the present utility are as follows:

[0014] An intelligent DC voltmeter based on a single-chip microcomputer of the present utility can effectively reduce the gap of the shielding cover, improve the shielding performance of the shielding cover, and reduce the electromagnetic interference received by the single-chip microcomputer of the intelligent DC voltmeter during use by arranging a deformable shielding strip to block the gap between the wire harness groove and the wire harness group. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present utility;

[0016] Figure 2 is an internal structural schematic diagram of the present utility;

[0017] Figure 3 is the present utility Figure 2 partial explosion diagram in;

[0018] Figure 4 is a structural schematic diagram of the pressing strip group of the present utility.

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Intelligent DC voltmeter main body; 2. Circuit board; 3. Single-chip microcomputer unit; 4. Wire harness group; 5. Shielding cover; 6. Wire harness groove; 7. Deformable shielding strip; 8. Pressing strip group; 9. Center pressing plate; 10. Edge pressing plate; 11. Side pressing plate; 12. Center connecting plate; 13. Side connecting plate; 14. Rotating rod; 15. Threaded rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the purpose and advantages of the present utility clearer, the present utility will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of the present utility, and does not strictly limit the specific protection scope claimed by the present utility.

[0022] like Figures 1-3 As shown, an intelligent DC voltmeter based on a single-chip microcomputer includes an intelligent DC voltmeter body 1, which is composed of a casing, a touch screen and buttons. A circuit board 2 is assembled inside the intelligent DC voltmeter body 1, a single-chip microcomputer unit 3 is electrically connected to the circuit board 2, and a wiring harness group 4 is electrically connected to the single-chip microcomputer unit 3. In order to reduce the electromagnetic interference to the single-chip microcomputer unit 3, a shielding cover 5 covering the outside of the single-chip microcomputer unit 3 is fixedly connected to the circuit board 2, a wiring harness groove 6 is opened on one side of the shielding cover 5, and the wiring harness group 4 extends to the outside of the shielding cover 5 through the wiring harness groove 6. At the same time, a plurality of heat dissipation fins can also be fixedly connected to the outside of the shielding cover 5 to improve the heat dissipation performance of the shielding cover 5.

[0023] In order to further improve the shielding performance of the shielding cover 5, a deformable shielding strip 7 is arranged on the outside of the shielding cover 5 and in front of the wiring harness groove 6. A pressure strip group 8 is installed on the outside of the shielding cover 5 and on the outside of the deformable shielding strip 7. The pressure strip group 8 can squeeze the deformable shielding strip 7 toward the direction close to the wiring harness group 4. At this time, when the shielding cover 5 is installed, the deformable shielding strip 7 is squeezed by the pressure strip group 8, so that the deformable shielding strip 7 can block the gap between the wiring harness groove 6 and the wiring harness group 4, which can effectively reduce the gap of the shielding cover 5 and improve the shielding performance of the shielding cover 5.

[0024] The deformable shielding strip 7 may include a latex sleeve, the interior of which is filled with shielding powder, and the material of the shielding powder may be any one of copper, iron and aluminum.

[0025] Among them, the deformable shielding strip 7 can also be an elastic conductive rubber, which is based on rubber and has conductive fillers (such as carbon black or metal powder) added thereto; the conductive rubber has soft elasticity and can be molded into different shapes, and has good conductive properties and can effectively shield electromagnetic radiation.

[0026] Among them, Figures 2-4 As shown, the pressure strip group 8 includes two edge pressure plates 10 with adjustable spacing, and the ends of the two edge pressure plates 10 that are away from each other are fixedly connected to side pressure plates 11. The edge pressure plates 10 and the side pressure plates 11 are arranged in an L shape. When the two edge pressure plates 10 move toward each other, the deformable shielding strip 7 can be squeezed by the two side pressure plates 11.

[0027] A central pressing plate 9 is provided at the lower side of the two edge pressing plates 10 . The central pressing plate 9 can effectively reduce the amount of the middle position of the deformable shielding strip 7 extending outward through the gap between the two edge pressing plates 10 .

[0028] A central connecting plate 12 is fixedly connected to the middle position on the upper side of the central pressing plate 9. A rotating rod 14 is rotatably connected to the central connecting plate 12. Fixedly connected to one end of each of the two side pressing plates 10 close to each other are side connecting plates 13. Fixedly connected to the rotating rod 14 are two threaded rods 15. The thread directions of the two threaded rods 15 are opposite, that is, the two threaded rods 15 are symmetrically arranged. The two threaded rods 15 are respectively threadedly connected to the two side connecting plates 13. When the rotating rod 14 rotates, it can drive the two threaded rods 15 to rotate. When the two threaded rods 15 rotate, they will drive the two side connecting plates 13 to move in opposite directions, thereby adjusting the distance between the two side pressing plates 10.

[0029] The working principle of this utility model is as follows: The shielding cover 5 is fixedly connected to the upper side of the intelligent DC voltmeter main body 1, and the shielding cover 5 covers the outside of the single-chip microcomputer unit 3. The wire harness group 4 extends to the outside of the shielding cover 5 through the wire harness slot 6;

[0030] Then rotate the rotating rod 14 to drive the two side connecting plates 13 to move towards each other, so that the side pressing plates 10 and the side pressing plates 11 squeeze the deformable shielding strip 7, and the deformable shielding strip 7 seals the gap between the wire harness slot 6 and the wire harness group 4.

[0031] In summary, this technical solution seals the gap between the wire harness slot 6 and the wire harness group 4 by setting the deformable shielding strip 7, which can effectively reduce the gap of the shielding cover 5, improve the shielding performance of the shielding cover 5, and reduce the electromagnetic interference received by the single-chip microcomputer of the intelligent DC voltmeter during use.

[0032] The above is only the preferred implementation mode of this utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of this utility model. The structures, devices, and operation methods not specifically described and explained in this utility model, unless otherwise specifically stated and defined, are implemented according to the conventional means in this field.

Claims

1. An intelligent DC voltmeter based on a single-chip microcomputer, comprising an intelligent DC voltmeter body (1), wherein a circuit board (2) is mounted inside the intelligent DC voltmeter body (1), a single-chip microcomputer unit (3) is electrically connected to the circuit board (2), and a wiring harness group (4) is electrically connected to the single-chip microcomputer unit (3), wherein: The circuit board (2) is fixedly connected with a shielding cover (5) covering the outside of the single-chip unit (3); a harness groove (6) is provided on one side of the shielding cover (5); the harness group (4) extends to the outside of the shielding cover (5) through the harness groove (6); a deformable shielding strip (7) is provided on the outside of the shielding cover (5) and located in front of the harness groove (6); and a pressure strip group (8) is installed on the outside of the shielding cover (5) and located on the outside of the deformable shielding strip (7).

2. The intelligent DC voltmeter based on a single chip microcomputer according to claim 1, characterized in that: The deformable shielding strip (7) comprises a latex sleeve, the interior of which is filled with shielding powder.

3. The intelligent DC voltmeter based on a single chip microcomputer according to claim 2, characterized in that: The shielding powder is made of any one of copper, iron and aluminum.

4. The intelligent DC voltmeter based on a single chip microcomputer according to claim 1, characterized in that: The pressure strip group (8) comprises two edge pressure plates (10) with adjustable spacing, and the ends of the two edge pressure plates (10) that are away from each other are fixedly connected to a side pressure plate (11), and the edge pressure plates (10) and the side pressure plates (11) are arranged in an L shape.

5. The intelligent DC voltmeter based on a single chip microcomputer according to claim 4, characterized in that: A central pressing plate (9) is arranged on the lower sides of the two edge pressing plates (10).

6. The intelligent DC voltmeter based on a single chip microcomputer according to claim 5, characterized in that: A center connecting plate (12) is fixedly connected to the middle position on the upper side of the center pressure plate (9), and a rotating rod (14) is rotatably connected to the center connecting plate (12). The ends of the two side pressure plates (10) close to each other are fixedly connected to side connecting plates (13), and two threaded rods (15) are fixedly connected to the rotating rod (14). The two threaded rods (15) are symmetrically arranged and are respectively threadedly connected to the two side connecting plates (13).

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