Anti-electromagnetic interference power electronic test oscilloscope

Abstract

The utility model relates to the technical field of electronic test oscilloscopes, in particular to an anti-electromagnetic interference power electronic test oscilloscope, which comprises an oscilloscope main body, a U-shaped groove is arranged on one side of the oscilloscope main body, and a first L-shaped cover plate and a second L-shaped cover plate which are symmetrically arranged are in sliding connection with the inner wall of the U-shaped groove. The oscilloscope has the advantages that the first L-shaped cover plate and the second L-shaped cover plate are inserted into the U-shaped grooves, the first L-shaped cover plate and the second L-shaped cover plate are locked through the locking bolts, electronic components in the oscilloscope body can be cooled by starting the draught fan, external air can flow into the shell through the air inlet channel at the moment, and therefore heat dissipation of the electronic components in the oscilloscope body can be achieved. The arrangement of the dustproof net can prevent external dust from entering the oscilloscope, and the design of the bent air inlet channel and the exhaust channel indirectly improves the shielding effectiveness of the housing through increasing the path length and complexity of electromagnetic wave propagation, and does not affect the heat dissipation performance of the oscilloscope at the same time.

Description

Technical Field

[0001] This utility model relates to the field of electronic test oscilloscope technology, and in particular to a power electronic test oscilloscope that is resistant to electromagnetic interference. Background Technology

[0002] An electronic test oscilloscope is a multifunctional electronic measuring instrument primarily used to observe and analyze the waveforms of electrical signals as they change over time. It can convert invisible electrical signals into visible images, facilitating researchers and technicians in studying the changing processes of various electrical phenomena. The main purpose of an oscilloscope is to display repeating or single waveforms on a screen and then analyze their properties such as amplitude, frequency, rise time, time interval, and distortion.

[0003] When using an electronic test oscilloscope, its casing plays a crucial role in preventing electromagnetic interference. The casing is typically made of metal, such as steel or aluminum alloy. These materials have good conductivity and shielding properties, effectively blocking external electromagnetic interference and protecting the internal electronic components and measurement circuits from impact. However, to facilitate heat dissipation, ventilation holes are usually provided on the casing. While these ventilation holes help reduce the internal temperature of the oscilloscope, improving stability and lifespan, they also reduce the casing's effectiveness in preventing interference. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide an electromagnetic interference oscilloscope for testing power electronics, in order to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides an electromagnetic interference-resistant power electronic testing oscilloscope, comprising an oscilloscope body, a U-shaped groove on one side of the oscilloscope body, a first L-shaped cover plate and a second L-shaped cover plate slidably connected to the inner wall of the U-shaped groove, a frame fixedly connected to the top surface of the oscilloscope body, a dustproof mesh fixedly connected to the inside of the frame by bolts, and locking plates fixedly connected to both sides of the frame, the first L-shaped cover plate and the second L-shaped cover plate being slidably connected to two locking plates respectively, and two symmetrically arranged locking plates being rotatably connected to the top of each locking plate. The locking bolts are used to fix the first L-shaped cover plate and the second L-shaped cover plate to the locking plate. The fan mounting plate is fixedly installed on the inner side of the first L-shaped cover plate by bolts. Several linear array fans are embedded on one side of the fan mounting plate. Several linear array exhaust channels are opened inside the second L-shaped cover plate. The output end of the fan corresponds to the bottom end of the exhaust channel. Several linear array air inlet channels are opened inside the first L-shaped cover plate. The input end of the fan corresponds to the bottom end of the air inlet channel. The top ends of the air inlet channel and the exhaust channel are connected to the frame.

[0007] Preferably, in any of the above embodiments, the inner wall of the frame is fixedly connected with a plurality of linear array pads, the top surface of the pads being in contact with the bottom surface of the dustproof net.

[0008] Preferably, in any of the above embodiments, both the first L-shaped cover plate and the second L-shaped cover plate are provided with threaded holes, and the screw portions of the plurality of locking bolts are threadedly connected to the first L-shaped cover plate and the second L-shaped cover plate respectively through the threaded holes.

[0009] Preferably, in any of the above solutions, the inner walls of the first L-shaped cover plate and the second L-shaped cover plate are provided with T-shaped sliding grooves, and the inner wall of the U-shaped groove is fixedly connected with a T-shaped sliding plate. The first L-shaped cover plate and the second L-shaped cover plate are slidably connected to the T-shaped sliding grooves and the T-shaped sliding plate.

[0010] Preferably, in any of the above solutions, the inner walls of the first L-shaped cover plate and the second L-shaped cover plate are fixedly connected with a retaining plate, and the inner wall of the U-shaped groove is provided with a plurality of symmetrically arranged retaining slots, and the retaining plate is slidably connected to the oscilloscope body through the retaining slots.

[0011] Preferably, in any of the above schemes, the inner wall of the first L-shaped cover plate is fixedly connected with a number of symmetrically arranged positioning pins, and the ends of the positioning pins away from the first L-shaped cover plate are engaged with the fan mounting plate.

[0012] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0013] When assembling the oscilloscope, insert the first L-shaped cover and the second L-shaped cover into the U-shaped slot. Once the card is fully inserted into the slot, use the locking screws to lock the first L-shaped cover and the second L-shaped cover. Turning on the fan will dissipate heat from the electronic components inside the oscilloscope. At this time, outside air can flow into the casing through the air intake channel and be exhausted through the exhaust channel. The dust filter can prevent outside dust from entering the oscilloscope. The curved air intake and exhaust channel design indirectly improves the shielding effectiveness of the casing by increasing the path length and complexity of electromagnetic wave propagation, without affecting the heat dissipation performance of the oscilloscope. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the assembly of this utility model;

[0015] Figure 2 This is an exploded structural diagram of the assembly of this utility model;

[0016] Figure 3 This is a schematic diagram of the main body of the oscilloscope of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the second L-shaped cover plate of this utility model;

[0018] Figure 5 This is an exploded structural diagram of the first L-shaped cover plate of this utility model.

[0019] In the diagram: 1-Oscilloscope body, 2-U-shaped groove, 3-First L-shaped cover plate, 4-Second L-shaped cover plate, 5-Frame, 6-Dustproof net, 7-Locking plate, 8-Locking bolt, 9-Fan mounting plate, 10-Fan, 11-Exhaust duct, 12-Inlet duct, 13-Pad plate, 14-Threaded hole, 15-T-shaped slide, 16-T-shaped slide plate, 17-Clamping plate, 18-Clamping slot, 19-Positioning pin. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0021] like Figures 1 to 5As shown, an electromagnetic interference-resistant power electronic testing oscilloscope includes an oscilloscope body 1. A U-shaped groove 2 is formed on one side of the oscilloscope body 1. A first L-shaped cover plate 3 and a second L-shaped cover plate 4 are slidably connected to the inner wall of the U-shaped groove 2. A frame 5 is fixedly connected to the top surface of the oscilloscope body 1. A dustproof mesh 6 is fixedly connected to the inside of the frame 5 by bolts. Locking plates 7 are fixedly connected to both sides of the frame 5. The first L-shaped cover plate 3 and the second L-shaped cover plate 4 are slidably connected to the two locking plates 7 respectively. Two symmetrically arranged locking bolts 8 are rotatably connected to the top of each locking plate 7. The second L-shaped cover plate 4 is fixedly connected to the locking plate 7 by locking bolts 8. The fan mounting plate 9 is fixedly installed on the inner side of the first L-shaped cover plate 3 by bolts. Several linear array fans 10 are embedded on one side of the fan mounting plate 9. Several linear array exhaust channels 11 are opened inside the second L-shaped cover plate 4. The output end of the fan 10 corresponds to the bottom end of the exhaust channel 11. Several linear array air inlet channels 12 are opened inside the first L-shaped cover plate 3. The input end of the fan 10 corresponds to the bottom end of the air inlet channel 12. The top ends of the air inlet channel 12 and the exhaust channel 11 are connected to the frame 5.

[0022] As an optional technical solution of this utility model, a plurality of linear array pads 13 are fixedly connected to the inner wall of the frame 5. The top surface of the pads 13 is in contact with the bottom surface of the dustproof mesh 6. By having the top surface of the pads 13 in contact with the bottom surface of the dustproof mesh 6, dust and other impurities can be effectively prevented from entering the oscilloscope, thereby protecting the electronic components of the oscilloscope from contamination and extending its service life. At the same time, the design of the dustproof mesh 6 allows air circulation, which helps with heat dissipation.

[0023] As an optional technical solution of this utility model, both the first L-shaped cover plate 3 and the second L-shaped cover plate 4 are provided with threaded holes 14. The screw portions of several locking bolts 8 are threadedly connected to the first L-shaped cover plate 3 and the second L-shaped cover plate 4 respectively through the threaded holes 14. The threaded holes 14 on the first L-shaped cover plate 3 and the second L-shaped cover plate 4 allow the screw portions of the locking bolts 8 to pass through and be threadedly connected to the cover plates. This design allows the L-shaped cover plates to be firmly fixed to the oscilloscope body, enhancing the structural stability of the oscilloscope, while also facilitating disassembly and maintenance.

[0024] As an optional technical solution of this utility model, both the inner walls of the first L-shaped cover plate 3 and the second L-shaped cover plate 4 are provided with T-shaped sliding grooves 15, and a T-shaped sliding plate 16 is fixedly connected to the inner wall of the U-shaped groove 2. The first L-shaped cover plate 3 and the second L-shaped cover plate 4 are slidably connected to the T-shaped sliding plate 16 through the T-shaped sliding grooves 15. The T-shaped sliding grooves 15 on the inner walls of the first L-shaped cover plate 3 and the second L-shaped cover plate 4 are slidably connected to the T-shaped sliding plate 16 fixed to the inner wall of the U-shaped groove 2. This sliding connection method allows the L-shaped cover plates to be easily opened or closed, facilitating internal inspection and maintenance of the oscilloscope.

[0025] As an optional technical solution of this utility model, the inner walls of the first L-shaped cover plate 3 and the second L-shaped cover plate 4 are both fixedly connected with retaining plates 17. The inner wall of the U-shaped groove 2 has several symmetrically arranged retaining slots 18. The retaining plates 17 are slidably connected to the oscilloscope body 1 through the retaining slots 18. The retaining plates 17 fixed to the inner walls of the first L-shaped cover plate 3 and the second L-shaped cover plate 4 are slidably connected to the oscilloscope body 1 through the retaining slots 18 on the inner wall of the U-shaped groove 2. This retaining method further enhances the connection stability between the L-shaped cover plate and the oscilloscope body, preventing the L-shaped cover plate from accidentally falling off or loosening.

[0026] As an optional technical solution of this utility model, a plurality of symmetrically arranged positioning pins 19 are fixedly connected to the inner wall of the first L-shaped cover plate 3. The ends of the positioning pins 19 away from the first L-shaped cover plate 3 are engaged with the fan mounting plate 9. The positioning pins 19 fixed to the inner wall of the first L-shaped cover plate 3 are engaged with the fan mounting plate 9. This design ensures the accurate position of the fan mounting plate and prevents it from shifting or loosening during operation, thereby ensuring the heat dissipation performance of the oscilloscope.

[0027] An electromagnetic interference-resistant power electronic testing oscilloscope, the working principle of which is as follows:

[0028] 1): When assembling an oscilloscope, the first L-shaped cover plate 3 and the second L-shaped cover plate 4 can be inserted into the U-shaped groove 2. At this time, the card plate 17 can be fully inserted into the card slot 18.

[0029] 2): Use locking bolts 8 to lock the first L-shaped cover plate 3 and the second L-shaped cover plate 4, and turn on the fan 10 to dissipate heat from the electronic components inside the oscilloscope body 1.

[0030] 3) Outside air can flow into the housing through the air intake channel 12 and be discharged from the exhaust channel 11. The dust filter 6 can prevent outside dust from entering the oscilloscope. The curved air intake channel 12 and exhaust channel 11 design indirectly improves the shielding effectiveness of the housing by increasing the path length and complexity of electromagnetic wave propagation.

[0031] In summary, when assembling this electromagnetic interference-resistant power electronic test oscilloscope, the first L-shaped cover plate 3 and the second L-shaped cover plate 4 can be inserted into the U-shaped groove 2. At this time, the retaining plate 17 can be fully inserted into the retaining groove 18. Then, the first L-shaped cover plate 3 and the second L-shaped cover plate 4 can be locked with the locking bolt 8. Turning on the fan 10 can dissipate heat from the electronic components inside the oscilloscope body 1. At this time, outside air can flow into the casing through the air inlet channel 12 and be discharged from the exhaust channel 11. Moreover, the dustproof mesh 6 can prevent outside dust from entering the oscilloscope. The curved air inlet channel 12 and exhaust channel 11 design indirectly improves the shielding effectiveness of the casing by increasing the path length and complexity of electromagnetic wave propagation, without affecting the heat dissipation performance of the oscilloscope.

Claims

1. A power electronic testing oscilloscope with electromagnetic interference immunity, characterized in that: The oscilloscope includes a main body (1), a U-shaped groove (2) on one side of the main body (1), a first L-shaped cover plate (3) and a second L-shaped cover plate (4) symmetrically arranged slidingly connected to the inner wall of the U-shaped groove (2), a frame (5) fixedly connected to the top surface of the main body (1), a dustproof mesh (6) fixedly connected to the inside of the frame (5) by bolts, and locking plates (7) fixedly connected to both the left and right sides of the frame (5). The first L-shaped cover plate (3) and the second L-shaped cover plate (4) are slidably connected to the two locking plates (7) respectively, and the top of each locking plate (7) is rotatably connected to two symmetrically arranged locking bolts (8). The first L-shaped cover plate (3) and the second L-shaped cover plate (4) are connected by... The first L-shaped cover plate (3) is fixedly connected to the locking plate (7) by locking bolts (8). The fan mounting plate (9) is fixedly installed on the inner side of the first L-shaped cover plate (3) by bolts. Several linear array fans (10) are embedded on one side of the fan mounting plate (9). Several linear array exhaust channels (11) are opened inside the second L-shaped cover plate (4). The output end of the fan (10) corresponds to the bottom end of the exhaust channel (11). Several linear array air inlet channels (12) are opened inside the first L-shaped cover plate (3). The input end of the fan (10) corresponds to the bottom end of the air inlet channel (12). The top ends of the air inlet channel (12) and the exhaust channel (11) are connected to the frame (5).

2. The electromagnetic interference-resistant power electronic test oscilloscope according to claim 1, characterized in that: The inner wall of the frame (5) is fixedly connected with several linear arrays of pads (13), and the top surface of the pads (13) is in contact with the bottom surface of the dustproof net (6).

3. The electromagnetic interference-resistant power electronic test oscilloscope according to claim 2, characterized in that: Both the first L-shaped cover plate (3) and the second L-shaped cover plate (4) are provided with threaded holes (14), and the screws of several locking bolts (8) are threadedly connected to the first L-shaped cover plate (3) and the second L-shaped cover plate (4) through the threaded holes (14).

4. The electromagnetic interference-resistant power electronic test oscilloscope according to claim 3, characterized in that: The inner walls of the first L-shaped cover plate (3) and the second L-shaped cover plate (4) are provided with T-shaped sliding grooves (15), and the inner wall of the U-shaped groove (2) is fixedly connected with a T-shaped sliding plate (16). The first L-shaped cover plate (3) and the second L-shaped cover plate (4) are slidably connected to the T-shaped sliding plate (16) through the T-shaped sliding grooves (15).

5. The electromagnetic interference-resistant power electronic test oscilloscope according to claim 4, characterized in that: The inner walls of the first L-shaped cover plate (3) and the second L-shaped cover plate (4) are fixedly connected with a card plate (17). The inner wall of the U-shaped groove (2) is provided with several symmetrically arranged card slots (18). The card plate (17) is slidably connected to the oscilloscope body (1) through the card slots (18).

6. The electromagnetic interference-resistant power electronic test oscilloscope according to claim 5, characterized in that: The inner wall of the first L-shaped cover plate (3) is fixedly connected with a number of symmetrically arranged positioning pins (19), and the ends of the positioning pins (19) away from the first L-shaped cover plate (3) are engaged with the fan mounting plate (9).

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