Stripline lifting device and EMC test system

Abstract

The utility model provides a stripline lifting device and an EMC test system, including: a stripline, an outgoing waveguide, a lifting motor, a fixed pulley device, and an incoming waveguide; the stripline is arranged in a darkroom, the outgoing waveguide and the incoming waveguide are arranged on the wall of the darkroom, and the fixed pulley device is arranged outside the darkroom; the hanging rope for hanging the stripline passes through the outgoing waveguide and out of the darkroom, and the hanging rope passing through the darkroom is wound around the fixed pulley device and then enters the darkroom from the incoming waveguide and is connected to the lifting motor. The present application adopts the structure of the outgoing waveguide and the incoming waveguide to pass through the hanging rope, which can effectively cut off or attenuate multi-band electromagnetic waves, and prevent electromagnetic waves outside the darkroom from entering the darkroom and affecting the test results.

Description

Technical Field

[0001] The utility model relates to the field of EMC testing devices, in particular to a strip line lifting device and an EMC testing system. Background Art

[0002] Due to the size and volume of the strip line, it is the most reasonable design to hang it on the top of the darkroom. When there is a need to test the immunity of the whole vehicle, the strip line will be lowered to a suitable position. When there is no test requirement, the strip line will be raised to the top to avoid affecting other test items. Usually, a manual device is used to adjust the height of the strip line. The process is cumbersome, and the height position of the strip line cannot be observed in real time, and the adjustment efficiency is too low. For example, the darkroom reconfigurable strip line for electromagnetic compatibility testing involved in patent CN113253036B fails to solve the problem of cumbersome strip line lifting and lowering. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a strip line lifting device and an EMC testing system.

[0004] According to the utility model, a strip line lifting device is provided, comprising: a strip line, an outlet waveguide, a lifting motor, a fixed pulley device and an inlet waveguide;

[0005] A strip line is arranged in the darkroom, an outgoing waveguide and an incoming waveguide are arranged on the wall of the darkroom, and a fixed pulley device is arranged outside the darkroom;

[0006] The hanging rope for hanging the strip line passes through the darkroom from the outgoing waveguide, and the hanging rope passing through the darkroom is wound around the fixed pulley device, enters the darkroom from the incoming waveguide and is connected to the lifting motor.

[0007] Preferably, the outgoing waveguide and the incoming waveguide are fixed on a shielding steel plate on the top of the darkroom, and the fixed pulley device is installed outside the darkroom near the outgoing waveguide and the incoming waveguide.

[0008] Preferably, the outgoing waveguide is fixed to the shielding steel plate by screws in combination with nuts with flanges.

[0009] Preferably, a relay and a PLC module are arranged in the darkroom, the relay is arranged between the lifting motor and the PLC module, the PLC module is connected to the relay, and the relay is connected to the lifting motor.

[0010] Preferably, a controller is arranged outside the darkroom, and the controller is connected to the PLC module.

[0011] Preferably, a filter is provided between the controller and the PLC module, and the filter is installed outside the darkroom.

[0012] Preferably, the outlet waveguide is provided with a plurality of outer frames covering the strip line.

[0013] Preferably, a radio frequency cable bundling device is provided around the strip line, and the radio frequency cables are bundled by the radio frequency cable bundling device.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. This application adopts the structure of outgoing waveguide and incoming waveguide to pass through the hanging rope, which can effectively cut off or attenuate multi-band electromagnetic waves, and prevent electromagnetic waves outside the darkroom from entering the darkroom and affecting the test results;

[0016] 2. This application adopts the structure of a lifting motor to realize the electrical lifting of the strip line without manual adjustment, which can greatly improve the test efficiency;

[0017] 3. This application uses a relay and PLC module in conjunction with a controller structure to avoid the need to enter a darkroom before powering on and off the lifting motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is the schematic diagram of the lifting device;

[0020] Figure 2 This is a schematic diagram of the installation position of the fixed pulley device;

[0021] As shown in the figure:

[0022] DETAILED DESCRIPTION

[0023] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0024] Example 1

[0025] like Figure 1-2As shown, this embodiment provides a stripline lifting device for EMC testing in a darkroom environment, including: a stripline 1, an outgoing waveguide 2, a lifting motor 3, a relay 4, a PLC module 5, a filter 6, a controller 7, a fixed pulley device 8, a radio frequency cable bundling device 9 and an incoming waveguide 10.

[0026] Among them, a strip line 1, an outgoing waveguide 2, a lifting motor 3, a relay 4, a PLC module 5, a radio frequency cable bundling device 9 and an incoming waveguide 10 are arranged in the darkroom, and a filter 6, a controller 7 and a fixed pulley device 8 are arranged outside the darkroom.

[0027] The outgoing waveguide 2 and the incoming waveguide 10 are fixed on the shielding steel plate at the top of the darkroom, and the fixed pulley device 8 is installed outside the darkroom near the outgoing waveguide 2 and the incoming waveguide 10. The relay 4 is arranged between the lifting motor 3 and the PLC module 5, the PLC module 5 is connected to the relay 4, the relay 4 is connected to the lifting motor 3, the controller 7 is connected to the filter 6, and the filter 6 is connected to the PLC module 5. The RF cable bundling device 9 is arranged on the side of the strip line 1, and the RF cable is bundled by the RF cable bundling device 9.

[0028] The hanging rope for hanging the strip line 1 passes through the darkroom from the outgoing waveguide 2 , and then enters the darkroom from the incoming waveguide 10 after being wound around the fixed pulley device 8 and connected and gathered on the lifting motor 3 .

[0029] In one embodiment, the outgoing waveguide 2 is fixed to the shielding steel plate by screws and nuts with flanges.

[0030] Example 2

[0031] Example 2 is a preferred example of Example 1.

[0032] like Figure 1-2 As shown, this embodiment includes: a stripline 1, an outlet waveguide 2, a lifting motor 3, a relay 4, a PLC module 5, a filter 6, a controller 7, a fixed pulley device 8, a radio frequency cable bundling device 9, and an incoming waveguide 10, wherein the hanging rope for hanging the stripline 1 passes through the outlet waveguide 2 at the top of the darkroom, and enters the darkroom from the incoming waveguide 10 on the other side, and is connected to the lifting motor 3 inside the darkroom, so that the height of the stripline 1 can be adjusted using the controller 7. For example, in the radiation immunity test of the whole vehicle in the 9KHz-30MHz frequency band, the stripline 1 needs to be lowered to a suitable height from the car. The device can be used in the control room to use the controller 7 to adjust the height of the stripline, which greatly improves the efficiency of the immunity test.

[0033] Specifically, the outgoing waveguide 2 and the incoming waveguide 10 are arranged at the place where the hanging rope enters and exits the darkroom to ensure the shielding of the entire darkroom shell. The outgoing waveguide 2 and the incoming waveguide 10 are equivalent to a high-pass filter. When the frequency of the electromagnetic wave is lower than the cut-off frequency of the waveguide, the electromagnetic wave is cut off or attenuated and cannot enter the darkroom; the outgoing waveguide 2 and the incoming waveguide 10 are both fixed on the top shielding steel plate, and a fixed pulley device 8 is installed next to the outgoing waveguide 2 and the incoming waveguide 10. The hanging rope for hanging the strip line 1 is from the outgoing waveguide 2 to the incoming waveguide 10. The line waveguide 2 passes through the darkroom, passes through the fixed pulley device 8, and then enters the darkroom from the incoming waveguide 10, and is connected to the lifting motor 3; the number and position of the outgoing waveguide 2 are determined according to the size and position of the entire strip line 1. The number of the outgoing waveguides 2 must be able to completely cover the outer frame of the strip line 1, so as to ensure that the force on each hanging rope is minimal and uniform; the outgoing waveguide 2 is fixed to the steel plate by 4 M10 screws and nuts with flanges, and the use of nuts with flanges is used to maximize the shielding performance of the entire darkroom.

[0034] The hanging rope is gathered on the lifting motor 3 to realize the raising and lowering of the strip line 1. The surrounding RF cables also need to be raised and lowered along with the strip line 1. This requires the installation of an RF cable gathering device 9. When the strip line 1 is raised, the RF cable gathering device 9 needs to work to release longer RF cables to meet the rising height; when the strip line 1 is lowered, the RF cable gathering device 9 will shrink the RF cables to prevent the stacking of RF cables from affecting the test results.

[0035] A relay 4 is installed between the lifting motor 3 and the PLC module 5, so that the lifting motor 3 can be powered on by controlling the attraction of the relay 4 through the PLC module 5. The controller 7 that controls the PLC module 5 is located in the control room, and the PLC module 5 is located in the darkroom. The cable connection in the middle needs to pass through the filter 6, so that it can ensure that the electrical signals inside the darkroom are filtered and will not affect the test results; the power supply of the controller 7 is a weak current supply, and the power supply of the lifting motor 3 is a strong current supply. Using weak current to control strong current greatly improves the safety of the strong current system in operation.

[0036] When using the strip line lifting device, all operations can be completed through the controller 7 in the control room. When the start button is pressed, the relay 4 is controlled by the PLC module 5 to work, the lifting motor 3 is powered on, and the entire device can start running; when the up button is pressed, the lifting motor 3 is rotated forward through the PLC module 5, and the lifting motor 3 pulls the strip line 1 up through the lifting rope; when the down button is pressed, the lifting motor 3 is rotated reversely through the PLC module 5, and the lifting motor 3 pulls the strip line 1 down through the lifting rope; during operation, the emergency stop button is pressed, and the lifting motor 3 is braked through the PLC module 5, and the strip line 1 stops the lifting operation and completes the emergency stop.

[0037] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A strip line lifting device, characterized in that: include: Strip line (1), outgoing waveguide (2), lifting motor (3), fixed pulley device (8) and incoming waveguide (10); A strip line (1) is arranged in a darkroom, an outgoing waveguide (2) and an incoming waveguide (10) are arranged on a wall surface of the darkroom, and a fixed pulley device (8) is arranged outside the darkroom; A hanging rope for hanging the strip line (1) passes through the darkroom from the outgoing waveguide (2), and the hanging rope passing through the darkroom is wound around the fixed pulley device (8), enters the darkroom from the incoming waveguide (10), and is connected to the lifting motor (3).

2. The strip line lifting device according to claim 1, characterized in that: The outgoing waveguide (2) and the incoming waveguide (10) are fixed on a shielding steel plate on the top of the darkroom, and the fixed pulley device (8) is installed on the outer side of the darkroom near the outgoing waveguide (2) and the incoming waveguide (10).

3. The strip line lifting device according to claim 2, characterized in that: The outgoing waveguide (2) is fixed on the shielding steel plate by means of screws and nuts with flanges.

4. The strip line lifting device according to claim 1, characterized in that: A relay (4) and a PLC module (5) are arranged in the darkroom, wherein the relay (4) is arranged between the lifting motor (3) and the PLC module (5), the PLC module (5) is connected to the relay (4), and the relay (4) is connected to the lifting motor (3).

5. The strip line lifting device according to claim 4, characterized in that: A controller (7) is arranged outside the darkroom, and the controller (7) is connected to the PLC module (5).

6. The strip line lifting device according to claim 5, characterized in that: A filter (6) is arranged between the controller (7) and the PLC module (5), and the filter (6) is installed outside the darkroom.

7. The stripline lifting device according to claim 1, characterized in that: A radio frequency cable bundling device (9) is arranged around the strip line (1), and the radio frequency cable is bundled by the radio frequency cable bundling device (9).

8. The stripline lifting device according to claim 1, characterized in that: The outgoing waveguide (2) is provided with a plurality of outer frames covering the strip line (1).

9. An EMC test system, characterized in that: A strip line lifting device as described in any one of claims 1 to 8 is used.

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