CN215835462U - Electromagnetic compatibility monitoring system - Google Patents
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- CN215835462U CN215835462U CN202122082457.XU CN202122082457U CN215835462U CN 215835462 U CN215835462 U CN 215835462U CN 202122082457 U CN202122082457 U CN 202122082457U CN 215835462 U CN215835462 U CN 215835462U
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Abstract
The utility model relates to an electromagnetic compatibility monitoring system. The electromagnetic compatibility monitoring system includes: an EMC darkroom; the test antenna is arranged in the EMC darkroom and used for sending out electromagnetic signals; the first to-be-tested piece is positioned in the EMC darkroom; the auxiliary component is positioned outside the EMC darkroom; the video optical conversion system is positioned between the first to-be-detected piece and the auxiliary piece, is electrically connected with the first to-be-detected piece and the auxiliary piece, and is used for mutual conversion between electric signals and optical signals; the first piece to be tested comprises an image acquisition device, and the auxiliary piece comprises a display device; or the first part to be measured comprises a display device and the auxiliary part comprises an image acquisition device. Because the auxiliary part is not interfered by the electromagnetic signal sent by the testing antenna, the auxiliary part can be considered to be normal, and when the auxiliary part is connected with the first to-be-tested part through the video optical switching system, the display device can display the abnormity only when the first to-be-tested part is abnormal, so that whether the electromagnetic compatibility test of the first to-be-tested part is qualified or not is judged through the display condition of the display device.
Description
Technical Field
The utility model relates to the technical field of electromagnetic compatibility tests, in particular to an electromagnetic compatibility monitoring system.
Background
At present, the proportion of electronic equipment on an automobile is getting larger and larger, so the problem of electromagnetic compatibility of the electronic equipment needs to be paid more attention. Therefore, the vehicle needs to be subjected to an electromagnetic Compatibility (EMC) test before being shipped out of the factory.
At present, when an image system of an automobile is subjected to an electromagnetic compatibility test, the whole image system is often required to be placed in an EMC (electro magnetic compatibility) darkroom for the electromagnetic compatibility test, and then a display screen of the image system is monitored through a monitoring camera arranged in the EMC darkroom.
However, in the testing process, the electronic devices constituting the image system are associated with each other, and any electronic device that is not qualified in the electromagnetic compatibility test will cause the electromagnetic compatibility test of the whole system to be unqualified, so that the unqualified electronic device cannot be determined specifically. The reversing image system comprises a reversing camera and a vehicle-mounted display screen, and when the reversing image system performs an anti-interference test in an EMC darkroom, the reversing camera and/or the vehicle-mounted display screen are abnormal, so that the reversing image system is unqualified in test, but the reversing camera or the vehicle-mounted display screen is difficult to determine to be abnormal according to a test result.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to provide an electromagnetic compatibility monitoring system, which includes:
an EMC darkroom;
the test antenna is arranged in the EMC darkroom and used for sending out electromagnetic signals;
the first to-be-tested piece is positioned in the EMC darkroom;
the auxiliary part is positioned outside the EMC darkroom;
the video optical conversion system is positioned between the first to-be-detected piece and the auxiliary piece, is electrically connected with the first to-be-detected piece and the auxiliary piece, and is used for mutual conversion between electrical signals and optical signals;
the first piece to be tested comprises an image acquisition device, and the auxiliary piece comprises a display device; or the first piece to be tested comprises a display device, and the auxiliary piece comprises an image acquisition device.
In one embodiment, the auxiliary member includes a second member to be tested.
In one embodiment, the image acquisition device comprises an image acquisition device; the display device comprises a display screen.
In one embodiment, the image capture device comprises a camera.
In one embodiment, the image acquisition device comprises a memory for storing image data, a reading device for reading the image data in the memory, and an output device for outputting the image data.
In one embodiment, the EMC protection device further comprises a power supply, wherein the power supply is arranged outside the EMC darkroom and is suitable for being electrically connected with the first to-be-tested part or being electrically connected with the first to-be-tested part and the auxiliary part.
In one embodiment, the test device further comprises an artificial power supply network, wherein the artificial power supply network is arranged in the EMC darkroom and is suitable for being arranged between the power supply and the first to-be-tested part.
In one embodiment, the power supply filter is arranged outside the EMC darkroom and between the artificial power supply network and the power supply.
In one embodiment, the video light conversion system comprises:
the first video optical conversion device is connected with the image acquisition device and is used for converting the electric signals into optical signals;
the second video optical conversion device is connected with the first video optical conversion device and the display device and is used for converting the optical signals into electric signals to be displayed by the display device;
and the optical fiber is positioned between the first video optical conversion device and the second video optical conversion device and is used for connecting the first video optical conversion device and the second video optical conversion device in series.
In one embodiment, the EMC darkroom further comprises an optical fiber wall connector, the optical fiber wall connector is arranged on a wall of the EMC darkroom, and the optical fiber between the first video light conversion device and the second video light conversion device extends from the inside of the EMC darkroom to the outside of the EMC darkroom through the optical fiber wall connector.
The electromagnetic compatibility monitoring system simulates an electromagnetic interference environment by generating an electromagnetic signal through the test antenna, and realizes the transmission and conversion of the signal through the video optical conversion system; the auxiliary part is not interfered by the electromagnetic signal sent by the testing antenna, so that the auxiliary part can be considered to be normal, and when the auxiliary part is connected with the first to-be-tested part through the video optical switching system, the display device can display the abnormality only if the first to-be-tested part is abnormal; therefore, when the first to-be-tested piece comprises the image acquisition device and the auxiliary piece comprises the display device, the image signal output by the image acquisition device is sent to the display device outside the EMC darkroom, and whether the electromagnetic compatibility test of the first to-be-tested piece is qualified or not is judged through whether the display device is normally displayed or not; and when the first piece to be tested comprises the display device and the auxiliary piece comprises the image acquisition device, the display device is monitored by the monitoring camera arranged in the EMC darkroom by sending the image signal output by the image acquisition device outside the EMC darkroom to the display device, so that the display condition of the display device is acquired, and whether the electromagnetic compatibility test of the first piece to be tested is qualified or not can be judged according to the display condition.
Drawings
Fig. 1 is a schematic structural diagram of an electromagnetic compatibility monitoring system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electromagnetic compatibility monitoring system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an image capturing device according to an embodiment of the present invention.
Description of reference numerals:
the device comprises a 1-EMC darkroom, a 2-test antenna, a 3-first to-be-tested part, a 4-auxiliary part, a 5-video light conversion system, a 51-first video light conversion device, a 52-optical fiber, a 53-second video light conversion device, a 6-power supply, a 7-power supply filter, an 8-artificial power supply network and a 9-optical fiber wall connector.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1, an embodiment of the present invention provides an electromagnetic compatibility monitoring system, where the electromagnetic compatibility monitoring system includes:
an EMC darkroom 1;
the test antenna 2 is arranged in the EMC darkroom 1 and used for sending out electromagnetic signals;
the first to-be-tested piece 3 is positioned in the EMC darkroom 1;
an auxiliary member 4 located outside the EMC darkroom 1;
the video optical conversion system 5 is positioned between the first part to be tested 3 and the auxiliary part 4, is electrically connected with the first part to be tested 3 and the auxiliary part 4, and is used for mutual conversion between electrical signals and optical signals;
the first piece to be tested 3 comprises an image acquisition device, and the auxiliary piece 4 comprises a display device; or the first piece to be tested 3 comprises a display device, and the auxiliary piece 4 comprises an image acquisition device.
The first piece to be tested 3 comprises an image acquisition device, and the auxiliary piece 4 comprises a display device; or the first piece to be tested 3 comprises a display device, and the auxiliary piece 4 comprises an image acquisition device.
In the above structure, the EMC darkroom 1 is an electromagnetic compatible darkroom 1, which can block the radio signal outside the room, and the electromagnetic wave inside the darkroom is emitted to the inner wall of the EMC darkroom 1 to be absorbed, so that the reflection and superposition wave mixing effect is not generated basically. Therefore, the method is more suitable for testing the electromagnetic compatibility and anti-interference capability of the sample.
Specifically, in conducting the test, the test antenna 2 emits an electromagnetic signal for electromagnetic interference as a test sample. The first piece to be tested 3 is arranged in the EMC darkroom 1 for electromagnetic compatibility testing. In this embodiment, whether the electromagnetic compatibility test of the first device under test 3 is qualified is determined by whether the display of the display device is abnormal, and the display device displays the abnormality, which may cause two possible reasons, namely, the abnormality of the image signal received by the display device and the abnormality of the display device. When the first to-be-tested piece 3 comprises an image acquisition device, the external terminal comprises a display device, the first to-be-tested piece 3 sends an image signal to the external terminal through the video optical conversion system 5, and because the display device of the external terminal is positioned outside the EMC darkroom 1, the auxiliary piece 4 is not interfered by the electromagnetic signal sent by the test antenna 2, and the display device of the external terminal can be considered to be normal, therefore, if the image displayed by the display device of the external terminal is abnormal in the test process, the image signal sent by the first to-be-tested piece 3 is abnormal, and the electromagnetic compatibility test of the first to-be-tested piece 3 is unqualified; on the contrary, if the image displayed by the display device of the external terminal is normal, the first device under test 3 is qualified in the electromagnetic compatibility test. When the first to-be-tested piece 3 comprises the display device, the auxiliary piece 4 comprises the image acquisition device, the auxiliary piece 4 sends an image signal to the first to-be-tested piece 3 through the video optical conversion system 5, and because the auxiliary piece 4 is positioned outside the EMC darkroom 1, the auxiliary piece 4 is not interfered by the electromagnetic signal sent by the test antenna 2, the image signal sent by the auxiliary piece 4 can be considered to be normal, so that if the image displayed by the display device of the first to-be-tested piece 3 is abnormal, the first to-be-tested piece 3 can be determined not to pass the electromagnetic compatibility test, the electromagnetic compatibility test of the first to-be-tested piece 3 is unqualified, and the display is abnormal; on the contrary, if the image displayed by the display device of the first to-be-tested piece 3 is normal, it is obvious that the first to-be-tested piece 3 passes the electromagnetic compatibility test, and the electromagnetic compatibility test of the first to-be-tested piece 3 is qualified, wherein the display device is monitored by the monitoring camera configured in the EMC darkroom 1, and the display condition of the display device is obtained by the corresponding monitoring display screen connected with the monitoring camera.
The electromagnetic compatibility monitoring system simulates an electromagnetic interference environment by generating an electromagnetic signal through the test antenna 2, and realizes the transmission and conversion of the signal by the cooperation of the video light conversion system 5; since the auxiliary part 4 is not interfered by the electromagnetic signal emitted by the test antenna 2, the auxiliary part 4 can be considered to be normal, and when the auxiliary part 4 is connected with the first to-be-tested part 3 through the video optical switching system 5, only if the first to-be-tested part 3 is abnormal, the display device can display the abnormality; therefore, when the first to-be-tested part 3 comprises the image acquisition device and the auxiliary part 4 comprises the display device, the image signal output by the image acquisition device is sent to the display device outside the EMC darkroom 1, and whether the electromagnetic compatibility test of the first to-be-tested part 3 is qualified or not is judged through whether the display device is normally displayed or not; and when the first piece 3 to be tested comprises a display device, sending an image signal output by the image acquisition device outside the EMC darkroom 1 to the display device, monitoring the display device through the monitoring camera arranged in the EMC darkroom 1, acquiring the display condition of the display device, and judging whether the electromagnetic compatibility test of the first piece 3 to be tested is qualified according to the display condition.
In one embodiment, the auxiliary element 4 comprises a second element to be tested.
When the image system of the automobile is subjected to electromagnetic compatibility test, and when the first piece to be tested 3 comprises the image acquisition device, the second piece to be tested comprises the display device; when the first device under test 3 comprises a display device, the second device under test comprises an image acquisition device. When the auxiliary member 4 includes the second member to be measured, an image acquiring device or a display device is not required to be additionally added.
In one embodiment, the image acquisition device comprises an image acquisition device; the display device comprises a display screen.
Specifically, the image acquisition device is used for acquiring images and generating corresponding image signals, then the image signals are sent to the display device through the video optical conversion system 5, the display screen of the display device receives the image signals and displays the image signals, and whether the electromagnetic compatibility test of the first piece to be tested 3 is qualified or not is judged through whether the display screen normally displays the image signals.
In one embodiment, the image capture device comprises a camera.
Specifically, the camera is a video input device, and the camera can take images in real time and generate corresponding image signals, so that the display device can display the images after receiving the image signals.
In one embodiment, as shown in fig. 3, the image capturing device includes a memory for storing image data, a reading device for reading the image data in the memory, and an output device for outputting the image data.
In one embodiment, the image acquisition device comprises a tachograph. The automobile data recorder can store image data, can be connected with an external display device, and accesses the recorded image data in the automobile data recorder through the external display device to display. Therefore, when the image acquisition device comprises the automobile data recorder, the image data stored by the automobile data recorder can be sent to the display device through the video optical conversion device, and the display device receives and displays the image data.
Specifically, the image acquisition device is mainly used for transmitting image signals, the image signals are not necessarily acquired in real time, image data can be stored in a storage device in the image acquisition device in advance, and the image data stored in the image acquisition device is determined to be normal only before testing. Therefore, when the image acquisition device comprises a memory, a reading device and an output device, the memory stores image data in advance, the reading device reads the image data in the memory during testing, the output device outputs an image signal according to the image data read by the reading device, the image signal is sent to the display device through the video optical conversion device, and then whether the electromagnetic compatibility test of the first piece to be tested 3 is qualified or not is determined through whether the display device normally displays the image signal.
In another embodiment, the image acquisition device comprises an image acquisition device, a memory, a reading device and an output device, wherein the image acquisition device acquires image signals and stores the image signals in the memory, the reading device is used for reading image data in the memory, and the output device is used for outputting the image data read by the reading device. The image signal is acquired in real time through the image acquisition device, and whether the image data stored in the image acquisition device is normal or not can be determined before testing.
In one embodiment, the EMC darkroom further comprises a power supply 6, wherein the power supply 6 is disposed outside the EMC darkroom 1 and is adapted to be electrically connected to the first device under test 3 or to be electrically connected to the first device under test 3 and the auxiliary device.
In application, the first device under test 3 is generally an electronic control device, and therefore, the power supply 6 is required to supply power to the first device under test 3. Since the power supply 6 generates electromagnetic waves, if the power supply 6 is disposed in the EMC darkroom 1, interference factors in the EMC increase, which affects the test result. In addition, if the power supply 6 is installed in the EMC darkroom 1, the power supply 6 is also affected by the electromagnetic wave emitted from the test antenna 2, which may affect the power supply stability of the power supply 6. Therefore, the power supply 6 needs to be arranged outside the EMC darkroom 1, so that the power supply stability of the first to-be-tested part 3 is guaranteed, and the situation that the first to-be-tested part 3 operates abnormally due to power supply abnormality and further a final test structure deviates is avoided.
In one embodiment, the test device further comprises an artificial power supply network 8, wherein the artificial power supply network 8 is arranged in the EMC darkroom 1 and is suitable for being arranged between the power supply 6 and the first to-be-tested part 3.
Specifically, the artificial power supply network 8 is used for preventing the radio frequency interference signal from being conducted from the power supply 6 to the first piece to be tested 3, and simultaneously preventing the interference signal of the first piece to be tested 3 from entering the power supply 6, thereby playing an isolation role. The power supply stability of the power supply 6 is guaranteed by setting the artificial power supply network 8, factors influencing the running state of the first piece to be tested 3 are reduced, and the test error is reduced.
In one embodiment, the power supply filter 7 is further included, and the power supply filter 7 is arranged outside the EMC darkroom 1 and between the artificial power supply network 8 and the power supply 6.
Specifically, the power filter 7 is an electrical device that effectively filters a frequency point of a specific frequency or frequencies other than the frequency point in the power supply 6 line. Interference signals in the transmission process can be further reduced through the power supply filter 7, and the stability of the power supply process is guaranteed.
As shown in fig. 2, in one embodiment, the video light conversion system 5 includes:
a first video optical converter 51 connected to the image acquisition device for converting the electrical signal into an optical signal;
a second video optical converter 53, connected to the first video optical converter 51 and the display device, for converting the optical signal into an electrical signal to be displayed by the display device;
and an optical fiber 52, located between the first video optical converter 51 and the second video optical converter 53, for connecting the first video optical converter 51 and the second video optical converter 53 in series.
The optical fiber 52 has a strong resistance to electromagnetic interference because the basic component of the optical fiber 52 is quartz, which only transmits light, is not conductive, and is not affected by the electromagnetic field, and the optical signal transmitted therein is not affected by the electromagnetic field. Therefore, in order to secure stable transmission of the image signal in the EMC darkroom 1, the image signal is transmitted in the EMC darkroom 1 through the optical fiber 52. Since the image signal output by the image capturing device is an electrical signal, not an optical signal, and it is necessary to convert the image signal output by the image capturing device into an optical signal in order to transmit the image signal in the optical fiber 52, a first video optical converter 51 is provided between the image capturing device and the optical fiber 52, and the image signal is converted into an optical signal by the first video optical converter 51, so that the image signal can be transmitted in the optical fiber 52. Meanwhile, the image signal received by the display device needs to be an electrical signal in order to identify the image signal for display, and therefore, a second video optical converter 53 is provided between the optical fiber 52 and the display device, and the optical signal is converted into the electrical signal by the second video optical converter 53 so that the display device can identify the image signal.
In one embodiment, the EMC darkroom further comprises an optical fiber wall connector 9 arranged on a wall of the EMC darkroom 1, wherein the optical fiber 52 between the first video light conversion device 51 and the second video light conversion device 53 extends from the inside of the EMC darkroom 1 to the outside of the EMC darkroom 1 through the optical fiber wall connector 9.
The optical fiber 52 comprises a first optical fiber 52 and a second optical fiber 52, the first optical fiber 52 is arranged in the EMC darkroom 1, one end of the first optical fiber is connected with the first video light conversion device 51, and the other end of the first optical fiber is connected with the optical fiber wall connector 9; the second optical fiber 52 is disposed outside the EMC darkroom 1, and has one end connected to the optical fiber wall connector 9 and the other end connected to the second video light conversion device 53.
Specifically, the optical fiber wall connector 9 is a device for detachably connecting the optical fiber 52 and the optical fiber 52, the optical fiber wall connector 9 penetrates through a wall body, the optical fiber wall connector 9 is provided with one port inside the EMC darkroom 1, and another port outside the EMC darkroom 1, and the first optical fiber 52 and the second optical fiber 52 are connected through the optical fiber wall connector 9, so that the light energy output by the transmitting optical fiber 52 can be maximally coupled into the receiving optical fiber 52.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An electromagnetic compatibility monitoring system, comprising:
an EMC darkroom;
the test antenna is arranged in the EMC darkroom and used for sending out electromagnetic signals;
the first to-be-tested piece is positioned in the EMC darkroom;
the auxiliary part is positioned outside the EMC darkroom;
the video optical conversion system is positioned between the first to-be-detected piece and the auxiliary piece, is electrically connected with the first to-be-detected piece and the auxiliary piece, and is used for mutual conversion between electrical signals and optical signals;
the first piece to be tested comprises an image acquisition device, and the auxiliary piece comprises a display device; or the first piece to be tested comprises a display device, and the auxiliary piece comprises an image acquisition device.
2. The emc monitoring system of claim 1, wherein the auxiliary member includes a second member to be tested.
3. The emc monitoring system of claim 1, wherein the image acquisition device comprises an image acquisition device; the display device comprises a display screen.
4. The emc monitoring system of claim 3, wherein the image capture device comprises a camera.
5. The emc monitoring system according to claim 1, wherein the image acquiring means includes a memory for storing image data, a reading means for reading the image data in the memory, and an output means for outputting the image data.
6. The EMC monitoring system of claim 1, further comprising a power supply disposed outside the EMC darkroom and adapted to be electrically connected to the first test object or to the first test object and the auxiliary.
7. The EMC monitoring system of claim 6, further comprising an artificial power network disposed within the EMC darkroom and adapted to be disposed between the power supply and the first item to be tested.
8. The EMC monitoring system of claim 7, further comprising a power filter disposed outside the EMC darkroom between the artificial power network and the power source.
9. The emc monitoring system of any one of claims 1-8, wherein the video light conversion system comprises:
the first video optical conversion device is connected with the image acquisition device and is used for converting the electric signals into optical signals;
the second video optical conversion device is connected with the first video optical conversion device and the display device and is used for converting the optical signals into electric signals to be displayed by the display device;
and the optical fiber is positioned between the first video optical conversion device and the second video optical conversion device and is used for connecting the first video optical conversion device and the second video optical conversion device in series.
10. The EMC surveillance system of claim 9, further comprising an optical fiber wall connector disposed on a wall of the EMC darkroom, wherein the optical fiber between the first and second video light conversion devices extends from within the EMC darkroom to outside the EMC darkroom via the optical fiber wall connector.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115664550A (en) * | 2022-12-14 | 2023-01-31 | 南京捷希科技有限公司 | Base station test system and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115664550A (en) * | 2022-12-14 | 2023-01-31 | 南京捷希科技有限公司 | Base station test system and test method |
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