CN216718562U - Radiation emission RE test system - Google Patents
Radiation emission RE test system Download PDFInfo
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- CN216718562U CN216718562U CN202123163045.5U CN202123163045U CN216718562U CN 216718562 U CN216718562 U CN 216718562U CN 202123163045 U CN202123163045 U CN 202123163045U CN 216718562 U CN216718562 U CN 216718562U
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Abstract
The embodiment of the utility model provides a radiation emission RE test system, which comprises: the device comprises a darkroom, a power supply arranged in the darkroom, a load box arranged in the darkroom and electrically connected with the power supply, a tested device arranged in the darkroom and electrically connected with the load box, a signal generator arranged outside the darkroom and electrically connected with the load box, a grounding capacitor with one end connected with the output end of the signal generator and the other end grounded, an antenna arranged in the darkroom, and a signal receiver arranged outside the darkroom and electrically connected with the antenna. The radiation emission RE test system eliminates external interference by adding the grounding capacitor, ensures the accuracy of the RE test result, solves the problem that the accuracy of the test result is influenced by introducing external low-frequency signals into a darkroom by input signals during RE test in the prior art, and has simple and efficient implementation mode.
Description
Technical Field
The utility model relates to the technical field of test equipment, in particular to a Radiation Emission (RE) test system.
Background
With the rapid development of automobile technology, more and more electronic products are available on automobiles, and the integration level is higher and higher, accordingly, the Radio Emission (RE) test of vehicles involves the transmission of a large amount of analog and digital quantities. In the RE test process, signal generating devices and the like are introduced to simulate relevant signals, and due to the arrangement of connecting cables, external interference sources are inevitably introduced to the devices, so that data deviation or failure of test results is caused.
SUMMERY OF THE UTILITY MODEL
The present specification provides a Radiation Emission (RE) testing system to overcome at least one technical problem in the prior art.
According to an embodiment of the present specification, there is provided a Radiation Emission (RE) test system including:
in the dark room, the light source is arranged,
a power supply arranged in the darkroom,
a load box disposed in the dark room and electrically connected to the power supply,
the tested device is arranged in the darkroom and is electrically connected with the load box,
a signal generator disposed outside the dark room and electrically connected to the load box,
a grounded capacitor, one end of which is connected with the output end of the signal generator and the other end is grounded, the grounded capacitor and the parasitic inductance of the transmission cable of the signal generator form a filter,
an antenna disposed in the dark room,
and the signal receiver is arranged outside the dark room and is electrically connected with the antenna.
Optionally, the method further comprises: and the power supply is connected with the load box through the artificial power supply network.
Further optionally, the artificial power network comprises a positive artificial power network and a negative artificial power network,
the input end of the positive artificial power supply network is electrically connected with the positive output end of the power supply, the output end of the positive artificial power supply network is electrically connected with the positive input end of the load box, the input end of the negative artificial power supply network is electrically connected with the negative output end of the power supply, and the output end of the negative artificial power supply network is electrically connected with the negative input end of the load box.
Further optionally, the method further comprises: the test workbench is arranged in the darkroom, and the power supply, the artificial power supply network, the load box and the tested equipment are arranged on the test workbench.
Still further optionally, an insulating layer is arranged between the load box and the tested device and between the test workbench.
Still further optionally, the thickness of the insulating layer is 50 mm.
Optionally, the antenna comprises a first antenna and a second antenna,
the first antenna is a low-frequency-band antenna and is arranged between the load box and the equipment to be tested, and the second antenna is a high-frequency-band antenna and corresponds to the arrangement position of the equipment to be tested.
Optionally, the ground capacitor is an adjustable capacitor.
Further optionally, the adjustable range of the grounding capacitor is 10 nF-5.1 μ F.
Optionally, the length of the node end lead of the grounding capacitor is less than 200 mm.
The beneficial effects of the embodiment of the specification are as follows:
through addding ground capacitance, make ground capacitance and transmission cable's parasitic inductance form a wave filter to eliminate outside interference, guaranteed the accuracy of RE test result, and then solved in the RE test process because the input signal influences the problem of test result accuracy with outside low frequency signal introduction darkroom inside, the realization is simple high-efficient. The RE testing cost is greatly reduced.
The technical effects of the embodiments of the present specification at least include:
1. in this embodiment, a ground capacitor is added at a signal source of the radiation emission RE test system, so that the ground capacitor and a parasitic inductance on a transmission cable of the signal source form a low-pass filter, and the low-pass filter can eliminate interference outside a darkroom, effectively isolate interference introduced into the darkroom by the external transmission cable, and ensure accuracy of a test result, which is one of technical effects of the embodiments of the present specification.
2. In this embodiment, the grounded capacitor is grounded, and the length of the lead at the node end is less than 200mm, so as to reduce the parasitic inductance to the ground, and ensure that the grounded capacitor and the parasitic inductance of the transmission cable form a filter, which is one of the technical effects of the embodiments of the present specification.
3. In this embodiment, the grounded capacitor with an adjustable capacitance value is adopted, so that input signals of different frequency bands can be met, the application range is wider, and the method is one of the technical effects of the embodiments of the present specification.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a radiation emission RE test system provided in an embodiment of the present disclosure;
FIG. 2 is a graph of test data under a conventional test protocol as provided by an example of the present specification;
FIG. 3 is a diagram of test data for an RE test system using radiation emission provided in an embodiment of the present disclosure;
description of reference numerals: the system comprises a darkroom 1, a power supply 2, a load box 3, a device to be tested 4, a signal generator 5, a grounding capacitor 6, an antenna 7, a first antenna 71, a second antenna 72, a signal receiver 8, an artificial power network 9, an anode artificial power network 91, a cathode artificial power network 92, a test workbench 10 and an insulating and heat-insulating layer 11.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses a radiation emission RE test system. The following are detailed below.
Fig. 1 illustrates a radiation emission RE test system provided according to an embodiment of the present description. As shown in fig. 1, the radiation emission RE test system mainly includes: the ground capacitor 6 is additionally arranged at the output end of the signal generator 5, and the ground capacitor 6 and the parasitic inductance of the transmission cable form a filter, so that external interference is eliminated, the accuracy of a test result is ensured, and the problem that an external signal source introduces interference through the transmission cable is solved.
Specifically, the darkroom 1 is one of the main structures of the radiation emission RE test system, and the surface of the inner wall of the darkroom is wrapped with a wave-absorbing material, so that a test environment is provided for the radiation emission RE test system, and the darkroom is used for simulating the effect of an open field. Inside the dark room 1, a power source 2, a load box 3, a device under test 4, and an antenna 7 are provided, and outside the dark room 1, a signal generator 5 and a signal receiver 8 are provided.
The power supply 2 is used as a power supply device of the radiation emission RE test system, is electrically connected with the load box 3 and supplies power to the load box 3. In a specific embodiment, the radiation emission RE testing system further includes an artificial power network 9 disposed between the power source 2 and the load box 3, on one hand, the power source 2 is electrically connected to the load box 3 through the artificial power network 9 to perform a filtering function to prevent interference signals from being conducted from the power source 2 for supplying power to the device under test 4, and on the other hand, the load box 3 is electrically connected to the load box 3 through the artificial power network 9 to also prevent interference signals of the device under test 4 from entering the power source 2 for supplying power to perform an isolation function.
Further, the artificial power network 9 includes an anode artificial power network 91 and a cathode artificial power network 92, as shown in fig. 1, an input end of the anode artificial power network 91 is electrically connected to an anode output end of the power supply 2, an output end of the anode artificial power network 91 is electrically connected to an anode input end of the load box 3, an input end of the cathode artificial power network 92 is electrically connected to a cathode output end of the power supply 2, and an output end of the cathode artificial power network 92 is electrically connected to a cathode input end of the load box 3.
The load box 3 is a load box of the electronic components required by the radiation emission RE test system, including but not limited to switches, loads, indicator lights, driver boards, etc., and is electrically connected to the device under test 4 through cables and to the signal generator 5. The signal generator 5 is electrically connected to the load box 3 as a signal source of the radiation emission RE test system, and simulates a specific signal required by the RE test to provide a signal required in the RE test. Meanwhile, an antenna 7 is arranged in the darkroom 1, signal transmission is carried out through an optical fiber and a coaxial cable, and the signal is transmitted to a signal receiver 8 which is electrically connected with the antenna 7 and outside the darkroom 1 so as to obtain a related test result.
In a specific embodiment, the antenna 7 comprises a first antenna 71, a second antenna 72. The first antenna 71 is a low-band antenna, which is disposed between the load box 3 and the device under test 4, corresponds to a center position of a cable for connecting the load box 3 and the device under test 4, and is mainly used for receiving a signal with a frequency f less than 1 GHz. The second antenna 72 is a high-band antenna corresponding to the setting position of the device under test 4, which is directly facing the device under test 4, for receiving a signal having a frequency f > 1 GHz.
In the embodiment of the specification, the radiation emission RE test system adds a grounding capacitor 6 at the output end of the signal generator 5, one end of the grounding capacitor 6 is electrically connected with the output end of the signal generator 5, and the other end of the grounding capacitor 6 is grounded, that is, a grounding capacitor is added at the signal source end, and a filter is formed by using the inductance characteristic of the transmission cable to filter out interference signals, so that the problem of interference introduced by an external signal source through the transmission cable in the prior art is solved.
In a specific embodiment, the grounded capacitor 6 is an adjustable capacitor with an adjustable capacitance value, so as to match input signals with different frequencies to meet input signals of different frequency bands, and the application range of the radiation emission RE test system is wider. The grounding capacitor 6 can be an adjustable capacitor of nF-muF level, and further, the adjustable range of the grounding capacitor 6 can be 10 nF-5.1 muF.
In the specific implementation process, the pin 1 of the grounding capacitor 6 can be connected with the output line of the signal generator 5 in a welding, splicing and other modes, the pin 2 of the grounding capacitor 6 can be grounded in a welding mode, the length of a lead wire at the node end of the grounding capacitor 6 is as short as possible and is less than 200mm, so that the parasitic inductance to the ground is reduced, the grounding capacitor 6 and the parasitic inductance of the transmission cable form a filter, and the formed filter can be used for eliminating the interference outside a darkroom. The selection of the parameters of the grounding capacitor 6 can be confirmed according to the frequency of the input signal and the coupling noise on the test frequency spectrum, generally, the interference introduced by the low-frequency part (100 kHz-530 kHz) can be filtered by the grounding capacitor 6 at the mu F level, the signal with higher frequency spectrum (more than 1.8 MHz) needs to be filtered by the grounding capacitor 6 at the nF level, and the specific parameters need to be obtained after calculation according to the actual frequency.
In addition, this radiation emission RE test system still includes test bench 10, and test bench 10 sets up in darkroom 1, provides arrangement space for power 2, artifical power network 9, load case 3, equipment under test 4, and power 2, artifical power network 9, load case 3, equipment under test 4 all set up on test bench 10. In a specific embodiment, an insulating layer 11 is disposed between the load box 3, the device under test 4 and the test workbench 10 to ensure stable operation of the load box 3 and the device under test 4, thereby ensuring accuracy of test results. Further, the thickness of the insulating layer 11 is 50 mm.
The foregoing has described the components of the radiation emission RE testing system and the connection relationship between them provided in the embodiments of the present specification, and the operation principle of the radiation emission RE testing system is described in detail below with reference to fig. 1 to 3.
In the RE test arrangement in the prior art, a signal source and a test system are subjected to common ground processing, and under normal conditions, no interference is actually generated to the test, but as the frequency increases, a transmission cable of the signal source gradually changes from resistive to inductive, and interference is brought into a darkroom in the signal transmission process, so that the deviation of a test result is caused. Fig. 2 shows test data under a conventional test scheme in the prior art, in which a peak curve is a spectrum generated by a Peak (PK) detector, and a mean curve is a spectrum generated by a mean (AV) detector, it is obvious that low-frequency data under a conventional test state exceeds a limit value, and thus cannot be used normally.
In the radiation emission RE test system in the embodiment of the description, the grounding capacitor 6 is additionally arranged at the output end of the signal generator 5, and the grounding capacitor 6 and the parasitic inductance on the transmission cable of the signal generator 5 form a low-pass filter, so that the external interference is eliminated, the accuracy of the test result is ensured, and the interference introduced into the darkroom 1 by the external transmission cable is effectively isolated. Fig. 3 shows test data using the radiation emission RE test system, and similarly, the peak curve is a spectrum generated by a Peak (PK) detector, and the average curve is a spectrum generated by an Average (AV) detector, and compared with fig. 2, the low frequency emission is reduced by about 27dB, and the test result is greatly optimized.
The grounding capacitor 6 can be adjusted according to the frequency of an input signal, generally, interference introduced by a low-frequency part (100 kHz-530 kHz) can be filtered by the grounding capacitor 6 at the level of mu F, and a signal with a higher frequency spectrum (more than 1.8 MHz) needs to be filtered by the grounding capacitor 6 at the level of nF, so that the testing time of the background noise of a darkroom can be effectively solved, and the debugging time can be shortened by more than 20%. In the prior art, the ground noise and the load ground noise are checked before the conventional RE test, formal test can be started only on the premise that the ground noise and the load ground noise both meet the requirements, the single site confirmation time can be different according to different standards and generally can be more than 15 hours, and the starting time of the formal test can be seriously influenced when the load ground noise does not pass. However, the application of the radiation emission RE test system can save 7 hours in the test, and the test cost is greatly reduced.
To sum up, the present specification discloses a radiation emission RE test system, which adds a ground capacitor to form a filter with parasitic inductance of a transmission cable, thereby eliminating external interference, ensuring accuracy of RE test results, and further solving the problem that accuracy of the test results is affected due to external low-frequency signals introduced into a darkroom by input signals during the RE test process, and the implementation is simple and efficient. The RE testing cost is greatly reduced.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A radiation emission, RE, test system, comprising:
in the dark room, the light source is arranged,
a power supply arranged in the darkroom,
a load box disposed in the dark room and electrically connected to the power supply,
the tested device is arranged in the darkroom and is electrically connected with the load box,
a signal generator disposed outside the dark room and electrically connected to the load box,
a grounded capacitor, one end of which is connected with the output end of the signal generator and the other end is grounded, the grounded capacitor and the parasitic inductance of the transmission cable of the signal generator form a filter,
an antenna disposed in the dark room,
and the signal receiver is arranged outside the dark room and is electrically connected with the antenna.
2. The Radiation Emission (RE) testing system of claim 1, further comprising: and the power supply is connected with the load box through the artificial power supply network.
3. The Radiated Emission (RE) testing system of claim 2, wherein the artificial power network includes a positive artificial power network and a negative artificial power network,
the input end of the positive artificial power supply network is electrically connected with the positive output end of the power supply, the output end of the positive artificial power supply network is electrically connected with the positive input end of the load box, the input end of the negative artificial power supply network is electrically connected with the negative output end of the power supply, and the output end of the negative artificial power supply network is electrically connected with the negative input end of the load box.
4. The Radiation Emission (RE) testing system of claim 2, further comprising: the test workbench is arranged in the darkroom, and the power supply, the artificial power supply network, the load box and the tested equipment are arranged on the test workbench.
5. The radiation emission RE testing system of claim 4, wherein an insulating thermal barrier is disposed between the load box and the device under test and the test bench.
6. The radiation-emitting RE testing system of claim 5, wherein said insulating and thermal barrier layer has a thickness of 50 mm.
7. The Radiated Emission (RE) test system of claim 1, wherein the antenna includes a first antenna and a second antenna,
the first antenna is a low-frequency-band antenna and is arranged between the load box and the equipment to be tested, and the second antenna is a high-frequency-band antenna and corresponds to the arrangement position of the equipment to be tested.
8. The radiation-emitting RE testing system of claim 1, wherein said ground capacitance is an adjustable capacitance.
9. The radiation-emitting RE testing system of claim 8, wherein said ground capacitance is adjustable in a range of 10nF to 5.1 μ F.
10. The radiation-emitting RE testing system of claim 1, wherein a node-side lead length of said grounded capacitor is less than 200 mm.
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| CN202123163045.5U CN216718562U (en) | 2021-12-16 | 2021-12-16 | Radiation emission RE test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114778994A (en) * | 2022-06-17 | 2022-07-22 | 扬芯科技(深圳)有限公司 | Electromagnetic interference test equipment and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114778994A (en) * | 2022-06-17 | 2022-07-22 | 扬芯科技(深圳)有限公司 | Electromagnetic interference test equipment and method |
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