CN113346963A - Vehicle-mounted wireless communication product electromagnetic anti-interference test system and method based on 5G signal - Google Patents
Vehicle-mounted wireless communication product electromagnetic anti-interference test system and method based on 5G signal Download PDFInfo
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Abstract
The invention discloses a vehicle-mounted wireless communication product electromagnetic anti-interference test system and method based on 5G signals, belonging to the technical field of electromagnetic anti-interference tests, wherein the vehicle-mounted wireless communication product electromagnetic anti-interference test system based on 5G signals comprises a 5G signal acquisition system, a real network signal processing system, a 5G signal transmitting system, a function monitoring and verifying system and an electromagnetic compatibility anti-interference test system; the 5G signal acquisition system is used for receiving signals sent by a nearby 5G base station, the real network signal processing system is used for amplifying the real network 5G signals acquired by the 5G signal acquisition system and then filtering the signals, and the 5G signal transmission system is used for transmitting the amplified and filtered external real network 5G signals in a darkroom for the 5G products to be detected; the invention adopts real network 5G signals to ensure that the 5G product is in a typical working state of actual use, does not need to replace an SIM card in the product, and can realize normal 5G networking and communication functions instead of software simulation input and output.
Description
Technical Field
The invention belongs to the technical field of electromagnetic interference rejection tests, and particularly relates to a vehicle-mounted wireless communication product electromagnetic interference rejection test system and method based on 5G signals.
Background
With the development of the 5G and automobile intelligent networking technology, the vehicle-mounted application increasingly adopts 5G communication to carry out information interaction, the 5G communication has the technical advantages of mass data connection, low time delay, high reliability and the like, the vehicle-mounted 5G product information interaction is mostly core data and safety information, the main functions comprise information acquisition, remote query and control upgrade, road rescue and other related functions, so the electromagnetic interference resistance performance of the vehicle-mounted 5G product is increasingly concerned by automobile manufacturers, and the electromagnetic interference resistance test work of the 5G product is carried out at the same time.
The current 5G product test faces the following major problems:
(1) the 5G product testing auxiliary equipment has market vacancy, and the related auxiliary testing equipment such as a signal filter, an amplifier and the like has no maturity of the 4G product market, and needs certain model selection matching capability and customized development capability;
(2) in the laboratory environment test, the electromagnetic shielding darkroom has the isolation effect on signals, so that how to ensure that the 5G product normally works in the laboratory environment to carry out the electromagnetic interference resistance test becomes a difficult point;
(3) the 5G base stations are less in layout, and the signal strength and the quality need to be focused;
(4) how to monitor communication performance indexes of 5G products, such as packet loss rate and the like, in a laboratory environment is a core problem.
At present, the existing 5G product test schemes and methods are few, most of the existing 5G product test schemes and methods use a 4G product test system for reference, 5G signals adopt a simulation input and output mode, a simulation product is in a 5G working state, and the test method can only roughly evaluate the product performance and cannot truly reproduce the 5G communication characteristics of the product.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a vehicle-mounted wireless communication product electromagnetic interference rejection test system and method based on 5G signals.
The invention is realized by the following technical scheme:
the electromagnetic interference rejection test system of the vehicle-mounted wireless communication product based on the 5G signal comprises a 5G signal acquisition system, a real network signal processing system, a 5G signal transmitting system, a function monitoring and verifying system and an electromagnetic compatibility interference rejection test system; the 5G signal acquisition system is used for receiving signals sent by a nearby 5G base station, the real network signal processing system is used for amplifying and then filtering real network 5G signals acquired by the 5G signal acquisition system, and the 5G signal transmission system is used for transmitting the amplified and filtered external real network 5G signals in a darkroom for the tested 5G product; the function monitoring and verifying system is connected with a tested 5G product, and is used for verifying and monitoring the functions of the 5G product before and in experiments; the electromagnetic compatibility anti-interference test system is used for placing 5G products and carrying out testing.
Preferably, the 5G signal acquisition system is a receiving antenna of a frequency band corresponding to the real network 5G signal.
Preferably, the real network signal processing system consists of a filter and an amplifier, and the real network 5G signal received by the 5G signal acquisition system is amplified and then filtered, so that the signal strength and quality are not attenuated after the real network 5G signal is introduced into the electromagnetic darkroom, and the problem of test failure caused by lifting of bottom noise of other frequency bands is avoided.
Preferably, the function monitoring and verifying system consists of a 5G mobile phone, a loudspeaker and a microphone, and is connected with a 5G product.
Preferably, the verification and monitoring of the 5G product function includes 5G mobile phone networking signal verification and 5G call quality verification.
Preferably, the electromagnetic compatibility anti-interference test system consists of an electromagnetic shielding darkroom, a 5G signal transmitting antenna, a battery and an electromagnetic interference transmitting antenna, wherein the 5G signal transmitting antenna, the battery and the electromagnetic interference transmitting antenna are positioned in the electromagnetic shielding darkroom, the battery is used for supplying power to a 5G product, the 5G signal transmitting antenna is connected with a real network signal processing system, a pair of CAN phototransmission is arranged inside and outside the electromagnetic shielding darkroom, the internal CAN phototransmission is connected with the 5G product, the external CAN phototransmission is connected with an upper computer, and the establishment of a communication path between the upper computer and the 5G product to be tested is completed; the electromagnetic interference transmitting antenna is opposite to the central position of the test wire harness in a frequency band below 1 GHz; the frequency band above 1GHz is over against the 5G product to be tested.
Preferably, the 5G signal acquisition system, the real network signal processing system and the function monitoring and verifying system are all placed in a natural environment outside the electromagnetic shielding darkroom, and the 5G product and the 5G signal transmitting system are located in the electromagnetic shielding darkroom.
The invention also aims to provide a method for testing electromagnetic interference resistance of a vehicle-mounted wireless communication product based on a 5G signal, which specifically comprises the following steps:
the method comprises the following steps: according to the 5G communication frequency band of the product, arranging a corresponding 5G receiving antenna outside an electromagnetic shielding darkroom, so as to realize the receiving work of the signals of the nearby 5G base station;
step two: connecting an external 5G receiving antenna with an internal 5G signal transmitting antenna in an electromagnetic shielding darkroom through a signal amplifier and a filter which are well selected and matched in advance, and building a signal transmission channel;
step three: opening the 5G mobile phone in the electromagnetic shielding darkroom, checking the receiving condition of the 5G signal, and displaying a full grid, so that the real network 5G signal introduction work is finished;
step four: according to an electromagnetic compatibility testing method, a tested 5G product testing environment is arranged, a battery supplies power to the product, 50 omega impedance matching is guaranteed, a pair of CAN phototranslation devices placed inside and outside a darkroom is used for completing building of a communication path between an upper computer and the tested product, and at the moment, building of a basic testing environment is completed;
step five: the device is connected to a tested 5G product through a loudspeaker and a microphone, the 5G call function of the product is debugged, and the 5G call of the product is ensured to be normal;
step six: the online communication debugging is completed through the mobile phone and the tested 5G product, so that the normal 5G communication function of the product is ensured;
step seven: arranging an interference signal source and power amplifier and power meter test equipment outside the electromagnetic shielding darkroom, arranging an interference source transmitting antenna inside the electromagnetic shielding darkroom, and enabling the transmitting antenna to be over against the central position of a test wire harness at a frequency band below 1 GHz; over 1GHz frequency band, the sample is aligned to the sample to be measured;
step eight: after the test system is powered on, in the process of testing the injection field intensity immunity of the transmitting antenna, simulating that the sample is in a 5G conversation state through a sound transmission system of a loudspeaker and a microphone, and if the conversation quality degradation function degradation performance occurs, the product immunity is unqualified;
step nine: in the electromagnetic interference resistance process of the vehicle-mounted 5G product, when the interference field intensity emitted by the interference source transmitting antenna in the working use frequency range of the tested sample causes the performance of function degradation, exemption needs to be given.
Compared with the prior art, the invention has the following advantages:
(1) the real network 5G signal is adopted, the 5G product is ensured to be in an actual use typical working state, an SIM card in the product does not need to be replaced, and the normal 5G networking and communication functions can be realized instead of software simulation input and output.
(2) And (3) selecting an adaptive filter and an adaptive amplifier to ensure the stability of the real network 5G signal intensity and quality after the electromagnetic darkroom is introduced.
(3) The problem of test failure caused by excessive internal environment background noise due to electromagnetic implication caused by other frequency bands outside the 5G frequency band is avoided.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an electromagnetic immunity test system of a vehicle-mounted wireless communication product based on 5G signals;
fig. 2 is a flowchart of a method for testing electromagnetic immunity of a vehicle-mounted wireless communication product based on 5G signals.
Detailed Description
For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification:
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.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Example 1
As shown in fig. 1, the embodiment provides a vehicle-mounted wireless communication product electromagnetic interference rejection test system based on a 5G signal, which includes a 5G signal acquisition system, a real network signal processing system, a 5G signal transmission system, a function monitoring and verification system, and an electromagnetic compatibility interference rejection test system; the 5G signal acquisition system is used for receiving signals sent by a nearby 5G base station, the real network signal processing system is used for amplifying and then filtering real network 5G signals acquired by the 5G signal acquisition system, and the 5G signal transmission system is used for transmitting the amplified and filtered external real network 5G signals in a darkroom for the tested 5G product; the function monitoring and verifying system is connected with a tested 5G product, and is used for verifying and monitoring the functions of the 5G product before and during the test; the electromagnetic compatibility anti-interference test system is used for placing 5G products and carrying out testing.
The 5G signal acquisition system is a receiving antenna of a frequency band corresponding to the real network 5G signal.
The real network signal processing system consists of a filter and an amplifier, and the real network 5G signals received by the 5G signal acquisition system are amplified and then subjected to filtering processing, so that the signal strength and quality are not attenuated after the real network 5G signals are introduced into the electromagnetic darkroom, and the problem of test failure caused by lifting of bottom noise of other frequency bands is solved.
The function monitoring and verifying system consists of a 5G mobile phone, a loudspeaker and a microphone, and is connected with a 5G product.
And the verification and monitoring of the 5G product function comprises 5G mobile phone networking signal verification and 5G call quality verification.
The electromagnetic compatibility anti-interference test system consists of an electromagnetic shielding darkroom, a 5G signal transmitting antenna, a battery and an electromagnetic interference transmitting antenna, wherein the 5G signal transmitting antenna, the battery and the electromagnetic interference transmitting antenna are positioned in the electromagnetic shielding darkroom; the electromagnetic interference transmitting antenna is opposite to the central position of the test wire harness in a frequency band below 1 GHz; the frequency band above 1GHz is over against the 5G product to be tested.
The 5G signal acquisition system, the real network signal processing system and the function monitoring and verifying system are all placed in a natural environment outside the electromagnetic shielding darkroom, and the 5G product and the 5G signal transmitting system are located in the electromagnetic shielding darkroom.
Example 2
The embodiment provides a vehicle-mounted wireless communication product electromagnetic interference rejection test method based on 5G signals, which specifically comprises the following steps:
the method comprises the following steps: according to the 5G communication frequency band of the product, such as moving 4800 MHz-4900 MHz, a corresponding 5G receiving antenna is arranged outside a laboratory, so that the receiving work of the signals of the nearby 5G base station is realized;
step two: an external 5G receiving antenna is connected with an internal 5G transmitting antenna in a darkroom through a pre-selected matched signal amplifier (mobile 5G model: KW20-B3NR41, Unicom telecommunication 5G model: KW20-B3NR42) and a filter (model COM-MWZBF13) to build a signal transmission channel;
step three: in a darkroom, opening the 5G mobile phone, checking the receiving condition of the 5G signal, and displaying a full grid, so that the real network 5G signal introduction work is finished;
step four: according to the electromagnetic compatibility testing method, a tested 5G product testing environment is arranged, a battery supplies power to the product, 50 omega impedance matching is guaranteed, the communication path building of upper computer software and the tested product is completed through a pair of CAN optical switches placed inside and outside a darkroom, and at the moment, the basic testing environment building is completed;
step five: the device is connected to a tested 5G product through a loudspeaker and a microphone, the 5G call function of the product is debugged, and the 5G call of the product is ensured to be normal;
step six: the online communication debugging is completed with the tested 5G product through the mobile phone, so that the normal 5G communication function of the product is ensured;
step seven: arranging an interference signal source and power amplifier and power meter test equipment outside a darkroom, arranging an interference source transmitting antenna inside a hint, and enabling the transmitting antenna to be over against the central position of a test wire harness at a frequency band below 1 GHz; over 1GHz frequency band, the sample is aligned to the sample to be measured;
step eight: after the test system is powered on, in the process of testing the injection field intensity immunity of the transmitting antenna, simulating that the sample is in a 5G conversation state through a sound transmission system of a loudspeaker and a microphone, and if the conversation quality degradation function degradation performance occurs, the product immunity is unqualified;
step nine: in the electromagnetic interference resistance process of the vehicle-mounted 5G product, when the interference field intensity emitted by the interference source transmitting antenna in the working use frequency range of the tested sample causes the performance of function degradation, exemption needs to be given.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. The electromagnetic interference rejection test system of the vehicle-mounted wireless communication product based on the 5G signal is characterized by comprising a 5G signal acquisition system, a real network signal processing system, a 5G signal transmitting system, a function monitoring and verifying system and an electromagnetic compatibility interference rejection test system; the 5G signal acquisition system is used for receiving signals sent by a nearby 5G base station, the real network signal processing system is used for amplifying and then filtering real network 5G signals acquired by the 5G signal acquisition system, and the 5G signal transmission system is used for transmitting the amplified and filtered external real network 5G signals in a darkroom for the tested 5G product; the function monitoring and verifying system is connected with a tested 5G product, and is used for verifying and monitoring the functions of the 5G product before and in experiments; the electromagnetic compatibility anti-interference test system is used for placing 5G products and carrying out testing.
2. The electromagnetic interference rejection test system for the vehicle-mounted wireless communication product based on the 5G signal as claimed in claim 1, wherein the 5G signal acquisition system is a receiving antenna corresponding to the frequency band of the real network 5G signal.
3. The electromagnetic interference rejection test system for the vehicle-mounted wireless communication product based on the 5G signal as claimed in claim 1, wherein the real network signal processing system is composed of a filter and an amplifier, and the real network 5G signal received by the 5G signal acquisition system is amplified and then filtered, so that after the system is introduced into the electromagnetic darkroom, the signal strength and quality are not attenuated, and the problem of test failure caused by the lifting of bottom noise in other frequency bands is avoided.
4. The electromagnetic interference resistance test system of the vehicle-mounted wireless communication product based on the 5G signal as claimed in claim 1, wherein the function monitoring and verification system is composed of a 5G mobile phone, a loudspeaker and a microphone, and is connected with the 5G product.
5. The electromagnetic interference rejection test system for 5G signal-based vehicle-mounted wireless communication products as claimed in claim 1, wherein said verification and monitoring of 5G product functions comprises 5G handset networking signal verification and 5G call quality verification.
6. The electromagnetic interference resistance test system of the vehicle-mounted wireless communication product based on the 5G signal according to claim 1, wherein the electromagnetic interference resistance test system is composed of an electromagnetic shielding darkroom, a 5G signal transmitting antenna, a battery and an electromagnetic interference transmitting antenna, wherein the 5G signal transmitting antenna is positioned in the electromagnetic shielding darkroom, the battery is used for supplying power to the 5G product, the 5G signal transmitting antenna is connected with a real network signal processing system, a pair of CAN optical switches are arranged inside and outside the electromagnetic shielding darkroom, the internal CAN optical switches are connected with the 5G product, the external CAN optical switches are connected with an upper computer, and the establishment of a communication path between the upper computer and the 5G product to be tested is completed; the electromagnetic interference transmitting antenna is opposite to the central position of the test wire harness in a frequency band below 1 GHz; the frequency band above 1GHz is over against the 5G product to be tested.
7. The electromagnetic interference immunity test system of the vehicle-mounted wireless communication product based on 5G signal as claimed in claim 6, wherein the 5G signal acquisition system, the real network signal processing system and the function monitoring and verification system are all disposed in the natural environment outside the electromagnetic shielding darkroom, and the 5G product and the 5G signal transmission system are disposed in the electromagnetic shielding darkroom.
8. The test method of the electromagnetic immunity test system of the vehicle-mounted wireless communication product based on the 5G signal as claimed in claim 1, characterized by comprising the following steps:
the method comprises the following steps: according to the 5G communication frequency band of the product, arranging a corresponding 5G receiving antenna outside an electromagnetic shielding darkroom, so as to realize the receiving work of the signals of the nearby 5G base station;
step two: connecting an external 5G receiving antenna with an internal 5G signal transmitting antenna in an electromagnetic shielding darkroom through a signal amplifier and a filter which are well selected and matched in advance, and building a signal transmission channel;
step three: opening the 5G mobile phone in the electromagnetic shielding darkroom, checking the receiving condition of the 5G signal, and displaying a full grid, so that the real network 5G signal introduction work is finished;
step four: according to an electromagnetic compatibility testing method, a tested 5G product testing environment is arranged, a battery supplies power to the product, 50 omega impedance matching is guaranteed, a pair of CAN phototranslation devices placed inside and outside a darkroom is used for completing building of a communication path between an upper computer and the tested product, and at the moment, building of a basic testing environment is completed;
step five: the device is connected to a tested 5G product through a loudspeaker and a microphone, the 5G call function of the product is debugged, and the 5G call of the product is ensured to be normal;
step six: the online communication debugging is completed through the mobile phone and the tested 5G product, so that the normal 5G communication function of the product is ensured;
step seven: arranging an interference signal source and power amplifier and power meter test equipment outside the electromagnetic shielding darkroom, arranging an interference source transmitting antenna inside the electromagnetic shielding darkroom, and enabling the transmitting antenna to be over against the central position of a test wire harness at a frequency band below 1 GHz; over 1GHz frequency band, the sample is aligned to the sample to be measured;
step eight: after the test system is powered on, in the process of testing the injection field intensity immunity of the transmitting antenna, simulating that the sample is in a 5G conversation state through a sound transmission system of a loudspeaker and a microphone, and if the conversation quality degradation function degradation performance occurs, the product immunity is unqualified;
step nine: in the electromagnetic interference resistance process of the vehicle-mounted 5G product, when the interference field intensity emitted by the interference source transmitting antenna in the working use frequency range of the tested sample causes the performance of function degradation, exemption needs to be given.
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