Shielding effectiveness test system and method

Abstract

The application provides a shielding effectiveness test system and method, a shielding partition is additionally arranged in a shielding chamber to distinguish a signal transmitting space and a signal receiving space, a signal transmitting device is placed in the signal transmitting space, during testing, external non-test electromagnetic wave signals are isolated by the shielding chamber, a window for placing a to-be-tested sample is arranged on the shielding partition, only electromagnetic wave signals passing through the to-be-tested sample are received by a signal receiving device, interference of non-test signals is isolated, and therefore the testing accuracy is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic compatibility, in particular to a shielding effectiveness test system and method. BACKGROUND

[0002] With the development of electronic technology, the electromagnetic environment in space environment is becoming more and more complex. The complex electromagnetic environment can interfere with or even damage the electronic equipment in the environment. Electromagnetic shielding can cut off the propagation path of electromagnetic waves, thereby eliminating interference.

[0003] The electromagnetic shielding effectiveness test method can effectively test the shielding effectiveness of electromagnetic shielding materials. The prior art such as the active light-transmitting shielding film shielding effectiveness test method, device and system (publication number: CN109406899A, publication date: 2019.03.01) generates a preset intensity electromagnetic wave signal through an electromagnetic wave signal generating device, and irradiates the electromagnetic wave signal to the window of the metal box body installed with the optical glass. The optical glass is provided with a to-be-tested light-transmitting shielding film. An electromagnetic shielding effectiveness calculation device collects the electromagnetic wave signal intensity in the metal box body after being shielded by the to-be-tested light-transmitting shielding film, and calculates the ratio of the electromagnetic wave signal intensity in the metal box body without the to-be-tested light-transmitting shielding film as the shielding effectiveness value of the to-be-tested light-transmitting shielding film. Thus, the shielding effectiveness of the light-transmitting shielding film is accurately tested.

[0004] However, the method has the following problems: during the test, in addition to the electromagnetic wave generated by the electromagnetic wave signal generating device, there are also electromagnetic wave interferences of non-test signals, which leads to inaccurate shielding effectiveness of the shielding material measured. SUMMARY

[0005] The purpose of the present application is to provide a shielding effectiveness test system and method, which can solve the problem of interference of external electromagnetic waves on the test results in the existing shielding material shielding effectiveness test technology, and the problem of large electromagnetic wave signal fluctuation in the metal box, which affects the accuracy of the collected data and leads to inaccurate shielding effectiveness test.

[0006] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical scheme:

[0007] In a first aspect, a shielding effectiveness test system is provided, comprising:

[0008] A shielding chamber is provided with a shielding partition layer, which divides the shielding chamber into a signal emitting space and a signal receiving space. A window for installing a sample is provided on the shielding partition layer. The inner surfaces of the signal emitting space and the signal receiving space are all provided with wave-absorbing materials.

[0009] A signal emitting device is provided in the signal emitting space for emitting a test electromagnetic wave signal.

[0010] The signal receiving device is arranged in the signal receiving space and is configured to receive the test electromagnetic wave signal.

[0011] In a possible implementation of the first aspect, the system further includes a sample frame which is detachably arranged on the window and configured to support the sample.

[0012] In a possible implementation of the first aspect, the system further includes a shielding assembly which includes a shielding layer configured to close a gap between the sample frame and the sample.

[0013] In a possible implementation of the first aspect, the system further includes a shielding assembly which includes a shielding layer and a pasting layer, the pasting layer is configured to be pasted at a joint between the sample frame and the sample to close a gap between the sample frame and the sample, and the shielding layer is arranged on a surface of the pasting layer.

[0014] In a possible implementation of the first aspect, the system further includes a shielding assembly which includes a shielding layer, a pasting layer and a conductive wire mesh, the conductive wire mesh is configured to fill a gap between the sample frame and the sample, the pasting layer is configured to fix the conductive wire mesh, and the shielding layer is arranged on a surface of the pasting layer.

[0015] In a possible implementation of the first aspect, a sliding rail is fixed on a ground of the signal receiving space, an extension direction of the sliding rail is perpendicular to a plane where the shielding layer is arranged, and the signal receiving device is fixed on the sliding rail through a sliding block.

[0016] In a possible implementation of the first aspect, the system further includes a driving mechanism configured to drive the sliding block to slide the signal receiving device along the sliding rail.

[0017] In a possible implementation of the first aspect, the system further includes a moving mechanism, a plurality of signal emitting device points are arranged in the signal emitting space, and the moving mechanism is configured to move the signal emitting device to any signal emitting device point.

[0018] In a second aspect, a shielding effectiveness testing method is provided, which is applied to a shielding effectiveness testing system and includes the following steps.

[0019] The signal emitting step: the signal receiving device receives a signal emitting instruction and emits a test electromagnetic wave signal.

[0020] The signal receiving step: the signal receiving device collects the test electromagnetic wave signal and sends a reading value of the test electromagnetic wave signal to the control device.

[0021] Driving step: the driving mechanism receives the first control signal sent by the control device, drives the slider to move the signal receiving device to the predetermined position, and repeats the signal emitting step to the driving step until the shielding effectiveness test is completed.

[0022] In a third aspect, a shielding effectiveness test method is provided, which is applied to a shielding effectiveness test system, and includes the following steps:

[0023] Signal emitting step: the signal receiving device receives the signal emitting instruction and emits the test electromagnetic wave signal;

[0024] Signal receiving step: the signal receiving device collects the test electromagnetic wave signal and sends the reading value of the test electromagnetic wave signal to the control device;

[0025] Moving step: the moving mechanism receives the second control signal sent by the control device, moves the signal emitting device to the predetermined signal emitting device point, and repeats the signal emitting step to the moving step until the shielding effectiveness test is completed.

[0026] The shielding effectiveness test system and method have the following advantages. First, compared with the prior art, the signal emitting device is arranged outside the shielding chamber, the signal receiving device is arranged inside the shielding chamber, and the shielding effectiveness is tested. However, the electromagnetic wave signal in the outside environment also enters the shielding chamber through the shielding material to be tested, which affects the test result. In the present application, a shielding partition is arranged in the shielding chamber, and the space in the shielding chamber is divided into a signal emitting space and a signal receiving space. The signal emitting space and the signal receiving space can both isolate the electromagnetic wave signal in the outside environment, thereby avoiding interference with the test result. The shielding partition can prevent the electromagnetic wave signal emitted by the signal emitting device from penetrating the wall and directly entering the signal receiving space without passing through the shielding material, thereby affecting the test of the shielding effectiveness of the shielding material.

[0027] Secondly, the inner surfaces of the signal emitting space and the signal receiving space are all provided with wave-absorbing materials. The wave-absorbing materials can absorb the electromagnetic wave signal reflected by the floor, the ceiling and the wall in the shielding chamber, reduce the electromagnetic wave signal fluctuation caused by the reflection of the inner surfaces of the shielding chamber, and keep the electromagnetic signal energy density in the shielding chamber stable. Furthermore, the electromagnetic wave emitted by the signal emitting device in the signal emitting space can enter the signal receiving space in a direction perpendicular to the shielding material to be tested, thereby preventing the test result from being inaccurate due to the angle of the electromagnetic wave signal. At the same time, the signal receiving device can collect accurate electromagnetic wave data, and therefore, the shielding effectiveness calculated by the present application is more accurate than the shielding effectiveness calculated without the wave-absorbing materials. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor should be within the scope of the present application.

[0029] In the formula, R represents a C1-C6 alkyl group, and n represents an integer of 1-3.

[0030] Figure 1 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0031] Figure 2 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0032] Figure 3 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0033] Figure 4 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0034] Figure 5 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0035] Figure 6 It is a schematic diagram of the structure of a shielding effectiveness test system in an embodiment.

[0036] Figure 7 It is a flow chart of a shielding effectiveness test method in an embodiment.

[0037] Figure 8 It is a flow chart of a shielding effectiveness test method in an embodiment.

[0038] In the formula, 1 represents a shielding chamber; 11 represents a shielding partition; 12 represents a wave-absorbing material; 13 represents a window; 14 represents a sample frame; 2 represents a signal transmitting device; 3 represents a signal receiving device; 4 represents a sample; 5 represents a shielding assembly; 6 represents a sliding rail; 7 represents a sliding block; and 8 represents a driving mechanism. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are merely used to explain the present application, and are not used to limit the present application.

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor should be within the scope of the present application.

[0041] It should be noted that the terms "comprises", "comprising", "includes", "including", and "has", "having" and any variations thereof in the specification and in the claims are intended to cover both the singular and the plural, and are intended to cover both the exclusive and the non-exclusive. For example, a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to only those steps or elements but can include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Similarly, the terms "first", "second", and the like, do not necessarily imply a physical or chronological order, but are merely used to distinguish one element from another.

[0042] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate. It is also expressly understood that the terms "an embodiment", "one embodiment", "some embodiments", and "another embodiment" as used herein, and in the claims, mean "at least one embodiment".

[0043] In the prior art, the shielding effectiveness of a test sample is generally tested by placing a signal receiving device in a shielding chamber, placing a signal emitting device outside the shielding chamber, opening a window in the shielding chamber, and placing the test sample at the window. However, there are many non-test electromagnetic wave signals in the outside world, which can easily pass through the test sample and enter the shielding chamber. When the signal receiving device receives the test signal and the non-test signal at the same time, the accuracy of the test result is affected. Therefore, the present application adds a shielding layer in the shielding chamber to distinguish a signal emitting space and a signal receiving space. The signal emitting device is placed in the signal emitting space. When testing, the non-test electromagnetic wave signals in the outside world are isolated by the shielding chamber. The window for placing the test sample is opened in the shielding layer. The signal receiving device only receives the electromagnetic wave signal passing through the test sample. The interference of the non-test signal is isolated. Therefore, the accuracy of the test is greatly improved.

[0044] As shown in Figure 1 and Figure 2 , a shielding effectiveness test system is provided, the system comprising:

[0045] a shielding chamber 1, a shielding layer 11 is arranged in the shielding chamber 1, the shielding chamber 1 is divided into a signal emitting space and a signal receiving space, a window 13 for installing a sample 4 is opened in the shielding layer 11, and the inner surfaces of the signal emitting space and the signal receiving space are all provided with wave-absorbing materials 12;

[0046] The signal transmitting device 2 is arranged in the signal transmitting space and is used for transmitting the test electromagnetic wave signal.

[0047] The signal receiving device 3 is arranged in the signal receiving space and is used for receiving the test electromagnetic wave signal.

[0048] Wherein, Figure 1 Fig. 1 is a structure diagram of a shielding effectiveness test system at a top view angle. The shielding chamber 1 is a closed full-metal box structure, which can also be a closed space composed of other shielding materials. The shielding partition 11 is made of shielding material, which can be metal or other shielding material that can meet the shielding requirements, and is preferably metal material. The shielding partition 11 can be an integral type, that is, made of a whole piece of metal, or can be spliced or welded by multiple metal pieces, and the splicing or welding part is shielded, such as sealing with conductive tape and the like, so that the connection part does not leak electromagnetic wave signals. Preferably, the shielding partition 11 is made of a whole piece of metal material, and the connection part between the shielding partition 11 and the shielding chamber 1 is shielded, or the shielding partition 11 and the shielding chamber 1 are integrated, and the test electromagnetic wave signals will not be leaked. The wave-absorbing material 12 is preferably wave-absorbing sponge, which is fixed on the inner surface of the signal transmitting space and the signal receiving space by glue or other fixing methods. In some scenarios, people want the shielding performance of the material to be weaker, for example, the shielding performance of the automobile glass is weaker, and the better the shielding performance, the better the mobile phone signal received in the car. When testing the shielding performance of these materials, a large amount of electromagnetic wave signals penetrates the sample 4 into the signal receiving space due to the weak shielding performance, causing multipath effect. Therefore, the wave-absorbing material 12 is arranged on the inner surface of the signal transmitting space and the signal receiving space. The purpose of arranging the wave-absorbing material 12 is to weaken or even eliminate the multipath effect in the process of electromagnetic wave propagation, to avoid the reflection of electromagnetic wave by the inner surface of the shielding chamber 1 such as the floor, wall and ceiling, to cause the inconsistency of the energy density in the shielding chamber 1, to randomly polarize, and to further cause the inaccuracy of the electromagnetic wave signal received by the signal receiving device 3. Therefore, by arranging the wave-absorbing material 12 on the inner surface of the signal transmitting space and the signal receiving space, the wave-absorbing material 12 can absorb the electromagnetic wave signals reflected by the floor, ceiling and wall in the shielding chamber 1, reduce the fluctuation of the electromagnetic wave signals caused by the reflection of the inner surface of the shielding chamber 1, and keep the electromagnetic signal energy density in the shielding chamber 1 stable. Further, the electromagnetic wave emitted by the signal transmitting device 2 in the signal transmitting space can enter the signal receiving space in a direction perpendicular to the shielding material to be tested, preventing the inaccuracy of the test results caused by the angle of the electromagnetic wave signal. At the same time, the signal receiving device 3 can also collect accurate electromagnetic wave data, so that the calculated shielding effectiveness is more accurate than the shielding effectiveness calculated without arranging the wave-absorbing material 12.

[0049] The signal transmitting device 2 comprises a signal transmitter and a transmitting antenna. The signal transmitting device 2 can be arranged at different positions in the signal transmitting space to measure the influence of signals transmitted at different distances and angles on the shielding performance of the sample 4 to be tested. The signal receiving device 3 comprises a receiving antenna and a spectrum analyzer. Similarly, the signal receiving device 3 can be arranged at different positions in the signal receiving space to measure the influence of signals received at different distances on the shielding performance of the sample 4 to be tested.

[0050] In another implementation, the signal transmitting device 2 can be placed in one of the two adjacent shielding rooms 1, and the signal receiving device 3 can be placed in the other shielding room 1. The wall shared by the two shielding rooms 1 serves as the shielding partition 11. A window 13 is formed in the shared wall, and the sample 4 to be tested is placed in the window 13. In this way, the shielding performance of the sample 4 to be tested can also be accurately tested.

[0051] In another implementation, when the sample 4 to be tested is a material with strong shielding performance such as metal, no wave-absorbing material 12 is arranged on the inner surface of the signal transmitting space and the signal receiving space. Because the material with strong shielding performance such as metal can shield most electromagnetic wave signals, the electromagnetic wave signals passing through the sample 4 to be tested are insufficient to cause multipath effect or have little impact on the test results.

[0052] The shielding performance test system has the following advantages. First, compared with the prior art, the signal transmitting device 2 is arranged outside the shielding room 1, and the signal receiving device 3 is arranged inside the shielding room 1 to test the shielding performance. However, the electromagnetic wave signals from the outside also enter the shielding room 1 through the shielding material to be tested, which affects the test results. In the present application, the shielding partition 11 is arranged in the shielding room 1 to divide the space in the shielding room 1 into a signal transmitting space and a signal receiving space. The signal transmitting space and the signal receiving space can both isolate the electromagnetic wave signals from the outside to avoid interference with the test results. The shielding partition 11 can prevent the electromagnetic wave signals transmitted by the signal transmitting device 2 from penetrating the wall and directly entering the signal receiving space without passing through the shielding material, which affects the test of the shielding performance of the shielding material.

[0053] Second, the wave-absorbing material 12 is arranged on the inner surface of the signal transmitting space and the signal receiving space. The wave-absorbing material 12 can absorb the electromagnetic wave signals reflected by the floor, ceiling and walls in the shielding room 1, reduce the fluctuation of the electromagnetic wave signals caused by the reflection of the inner surface of the shielding room 1, and keep the energy density of the electromagnetic signals in the shielding room 1 stable. Furthermore, the electromagnetic wave signals transmitted by the signal transmitting device 2 in the signal transmitting space can enter the signal receiving space in a direction perpendicular to the shielding material to be tested, which prevents the test results from being inaccurate due to the angle of the electromagnetic wave signals. At the same time, the signal receiving device 3 can collect accurate electromagnetic wave data, so that the shielding performance calculated based on the accurate electromagnetic wave data is more accurate than the shielding performance calculated based on the electromagnetic wave data without the wave-absorbing material 12.

[0054] As Figure 3 shown in one embodiment, the system further comprises: a sample frame 14, which is detachably arranged on the window 13, for supporting the sample 4.

[0055] Wherein, during testing, it is often necessary to test a large number of different materials, and directly placing the sample 4 on the window 13 of the shielding partition 11 is time-consuming and inefficient, and it is not convenient to shield between the sample 4 and the window 13. Therefore, the embodiment is provided with a sample frame 14, which is detachably mounted on the window 13, and the sample 4 to be tested is placed in the sample frame 14. The frame of the sample frame 14 is made of metal material, commonly galvanized steel and copper, which can effectively prevent electromagnetic wave signals from passing through the frame. By taking and placing the sample 4 to be tested through the sample frame 14, the taking and placing speed can be improved, and the testing efficiency can be improved.

[0056] As Figure 4 shown in one embodiment, the system further comprises: a shielding assembly 5, which comprises a shielding layer for closing the gap between the sample frame 14 and the sample 4.

[0057] Wherein, when the sample 4 to be tested is installed in the sample frame 14 for testing, due to the gap between the sample 4 and the sample frame 14, electromagnetic wave signals can enter the signal receiving space through these gaps, resulting in that the electromagnetic wave signals received by the signal receiving device 3 are not all electromagnetic wave signals transmitted through the sample 4 to be tested, which will affect the accuracy of the test results. Therefore, the embodiment is further provided with a shielding assembly 5, which comprises a shielding layer made of shielding material such as metal, for example, tin paper. Covering the shielding layer on the gap between the sample frame 14 and the sample 4 can prevent electromagnetic wave signals from entering the signal receiving space through the gap and interfering with the test.

[0058] In one embodiment, the system further comprises: a shielding assembly 5, which comprises a shielding layer for closing the gap between the sample frame 14 and the sample 4.

[0059] The shielding assembly 5 is provided in the embodiment, which comprises a shielding layer, a sticking layer and a conductive wire mesh. The conductive wire mesh is used to fill the gap between the sample frame 14 and the sample 4, the sticking layer is used to fix the conductive wire mesh, and the shielding layer covers the surface of the sticking layer.

[0060] In one embodiment, the system further comprises a shielding assembly 5, which comprises a shielding layer, a sticking layer and a conductive wire mesh. The conductive wire mesh is used to fill the gap between the sample frame 14 and the sample 4, the sticking layer is used to fix the conductive wire mesh, and the shielding layer covers the surface of the sticking layer.

[0061] The shielding assembly 5 is provided in the embodiment, which comprises a shielding layer, a sticking layer and a conductive wire mesh. The conductive wire mesh is used to fill the gap between the sample frame 14 and the sample 4, the sticking layer is used to fix the conductive wire mesh, and the shielding layer covers the surface of the sticking layer.

[0062] As shown in FIG. 6, in one embodiment, the signal receiving space is fixed with a slide rail 6 on the ground, the extension direction of the slide rail 6 is perpendicular to the plane where the shielding layer 11 is located, and the signal receiving device 3 is fixed on the slide rail 6 through a sliding block 7. Figure 5

[0063] The shielding assembly 5 is provided in the embodiment, which comprises a shielding layer, a sticking layer and a conductive wire mesh. The conductive wire mesh is used to fill the gap between the sample frame 14 and the sample 4, the sticking layer is used to fix the conductive wire mesh, and the shielding layer covers the surface of the sticking layer. Figure 5 ​This is a partial structural diagram of the shielding effectiveness testing system from a side view. When testing the effect of the distance between sample 4 and signal receiving device 3 on the shielding performance of sample 4, the position of signal receiving device 3 needs to be adjusted. Manual adjustment can easily lead to inaccurate positioning. Therefore, in this embodiment, a slide rail 6 is fixed on the ground in the signal receiving space, and the extension direction of the slide rail 6 is perpendicular to the plane of the shielding layer 11. This ensures that the line connecting the signal receiving device 3 fixed on the slide rail 6 and sample 4 is perpendicular to the plane of sample 4, meeting the testing requirements. Furthermore, adjusting the position of the signal receiving device 3 using the slide rail 6 is more accurate than manually moving the signal receiving device 3.

[0064] like Figure 6 As shown, in one embodiment, the system further includes a drive mechanism 8 for driving the slider 7 to move the signal receiving device 3 along the slide rail 6.

[0065] in, Figure 6 This is a partial structural diagram of the shielding effectiveness testing system from a side view. When testing the effect of the distance between sample 4 and signal receiving device 3 on the shielding performance of sample 4, the position of signal receiving device 3 needs to be adjusted. However, when the signal receiving position is manually adjusted, the movement of the person causes disturbances in the energy of electromagnetic waves at the same location indoors, resulting in large fluctuations in the signal received by signal receiving device 3, affecting the accuracy of the test. Therefore, this embodiment sets up a driving mechanism 8. When a control signal is received, the driving mechanism 8 drives the slide rail 6, causing the signal receiving device 3 to slide along the slide rail 6. This achieves automatic adjustment of the position of signal receiving device 3, avoiding electromagnetic wave signal fluctuations caused by manual adjustment, which would affect the accuracy of the test results.

[0066] In one embodiment, the system further includes a moving mechanism, wherein a plurality of signal transmitting device positions are provided in the signal transmitting space, and the moving mechanism is used to move the signal transmitting device 2 to any of the signal transmitting device positions.

[0067] Wherein, in the test sample 4 and the influence of the distance and angle of the signal emitting device 2 on the shielding performance of the sample 4, the position of the signal emitting device 2 needs to be adjusted, and when the test position is more, the efficiency of manual adjustment is low. Therefore, the embodiment sets a moving mechanism, which can be a motor driving the signal emitting device 2 to move on the slide rail 6, or a robot grabbing the signal emitting device 2 to move to different positions. A plurality of signal emitting device points are arranged in the signal emitting space, and the number of signal emitting device points is different in different tests, which is determined according to the actual situation. The influence of signals with different distances and angles on the shielding performance of the sample 4 is tested at different points. The moving mechanism is used to move the signal emitting device 2 to any signal emitting device point. The position of the signal emitting device 2 is automatically adjusted, which is more efficient and more accurate than manual movement.

[0068] As shown in Figure 7 , a shielding effectiveness test method is proposed, which is applied to a shielding effectiveness test system, and the method comprises the following steps:

[0069] The signal emitting step 101: the signal emitting device receives the signal emitting instruction and emits the test electromagnetic wave signal;

[0070] The signal receiving step 102: the signal receiving device collects the test electromagnetic wave signal and sends the reading value of the test electromagnetic wave signal to the control device;

[0071] The driving step 103: the driving mechanism receives the first control signal sent by the control device, drives the slide block to move the signal receiving device to the predetermined position, and repeats the signal emitting step to the driving step until the shielding effectiveness test is completed.

[0072] Wherein, the signal emitting device, the signal receiving device and the driving mechanism are electrically connected with the control device outside. After the control device emits the signal emitting instruction to the signal emitting device, the signal emitting device emits the test electromagnetic wave signal. The signal receiving device automatically collects the test electromagnetic wave signal transmitted through the sample and reads the value, and sends the reading value to the control device. When the test result of the signal receiving device at a certain position is measured, the position of the signal receiving device needs to be changed, the control device sends the first control signal to the driving mechanism, controls the driving device to drive the slide block to move the signal receiving device to the predetermined position, and repeats the signal emitting step 101 to the driving step 103 until all positions are measured and the shielding effectiveness test is completed.

[0073] As shown in Figure 8 , a shielding effectiveness test method is proposed, which is applied to a shielding effectiveness test system, and the method comprises the following steps:

[0074] Signal transmitting step 201: the signal transmitting device receives a signal transmitting instruction and transmits a test electromagnetic wave signal;

[0075] Signal receiving step 202: the signal receiving device collects the test electromagnetic wave signal and sends a reading value of the test electromagnetic wave signal to the control device;

[0076] Moving step 203: the moving mechanism receives a second control signal sent by the control device, moves the signal transmitting device to a predetermined signal transmitting device point, and repeats the signal transmitting step 201 to the moving step 203 until the shielding effectiveness test is completed.

[0077] Wherein, the signal transmitting device, the signal receiving device and the moving mechanism are electrically connected with the control device outside, after the control device sends a signal transmitting instruction to the signal receiving device, the signal transmitting device transmits a test electromagnetic wave signal; the signal receiving device automatically collects the test electromagnetic wave signal through the sample and reads the value, and sends the reading value to the control device. When the test result of the signal transmitting device at a certain position is measured, the position of the signal transmitting device needs to be changed, the control device sends a first control signal to the moving mechanism to control the moving device to move the signal transmitting device to a predetermined position, and the signal transmitting step 201 to the moving step 203 are repeated until all positions are measured and the shielding effectiveness test is completed.

[0078] The technical features of the above embodiments can be combined in any way. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0079] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A shielding effectiveness testing system, characterized in that, The system includes: A shielded room is provided, wherein a shielding partition is provided inside the shielded room, dividing the shielded room into a signal transmission space and a signal receiving space. A window for installing a sample is provided on the shielding partition. The inner surfaces of the signal transmission space and the signal receiving space are all covered with wave-absorbing material. A signal transmitting device is installed within the signal transmitting space for transmitting test electromagnetic wave signals; A signal receiving device is disposed within the signal receiving space for receiving the test electromagnetic wave signal; The system also includes: A sample frame, which is detachably mounted on the window, is used to support the sample; The system further includes a shielding component, the shielding component including a shielding layer, the shielding layer being used to seal the gap between the sample frame and the sample; A slide rail is fixed on the ground of the signal receiving space. The extension direction of the slide rail is perpendicular to the plane where the shielding layer is located. The signal receiving device is fixed on the slide rail by a slider.

2. The shielding effectiveness testing system as described in claim 1, characterized in that, The shielding component of the system may also be: the shielding component includes a shielding layer and an adhesive layer, the adhesive layer is used to stick to the connection between the sample frame and the sample to seal the gap between the sample frame and the sample, and the shielding layer covers the surface of the adhesive layer.

3. The shielding effectiveness testing system as described in claim 1, characterized in that, The shielding component of the system may also be: the shielding component includes a shielding layer, an adhesive layer and a conductive mesh, the conductive mesh is used to fill the gap between the sample frame and the sample, the adhesive layer is used to fix the conductive mesh, and the shielding layer covers the surface of the adhesive layer.

4. The shielding effectiveness testing system as described in claim 1, characterized in that, The system further includes a drive mechanism for driving the slider to move the signal receiving device along the slide rail.

5. The shielding effectiveness testing system as described in claim 1, characterized in that, The system also includes a moving mechanism. Several signal transmitting device locations are set in the signal transmitting space. The moving mechanism is used to move the signal transmitting device to any of the signal transmitting device locations.

6. A shielding effectiveness testing method, applied to the shielding effectiveness testing system as described in claim 5, characterized in that, The method includes the following steps: Signal transmission steps: The signal transmitting device receives the signal transmission command and transmits the test electromagnetic wave signal; Signal receiving steps: The signal receiving device acquires the test electromagnetic wave signal and sends the reading of the test electromagnetic wave signal to the control device; Driving steps: The driving mechanism receives the first control signal sent by the control device, drives the slider to move the signal receiving device to a predetermined position, and repeats the signal transmission step to the driving step until the shielding effectiveness test is completed.

7. A shielding effectiveness testing method, applied to the shielding effectiveness testing system as described in claim 6, characterized in that, The method includes the following steps: Signal transmission steps: The signal transmitting device receives the signal transmission command and transmits the test electromagnetic wave signal; Signal receiving steps: The signal receiving device acquires the test electromagnetic wave signal and sends the reading of the test electromagnetic wave signal to the control device; Movement step: The moving mechanism receives the second control signal sent by the control device, moves the signal transmitting device to the predetermined signal transmitting device position, and repeats the signal transmitting step to the movement step until the shielding effectiveness test is completed.

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