CN116165446A - Electromagnetic wave signal management system and method for anechoic chamber - Google Patents
Electromagnetic wave signal management system and method for anechoic chamber Download PDFInfo
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Abstract
The invention discloses an electromagnetic wave signal management system and method for an anechoic chamber. Under the condition that an interference signal source is arranged outside the anechoic chamber, the first signal generation module generates a first detection signal and outputs the first detection signal through a transmitting antenna; the spectrum analysis module acquires a first feedback signal about a first detection signal received by a receiving antenna; and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, and judges whether the shielding effectiveness of the anechoic chamber passes the detection. The shielding performance of the anechoic chamber can be timely detected and timely adjusted according to the requirement, so that the reliability of the shielding performance of the anechoic chamber can be improved, and the follow-up detection process of equipment to be detected and the accurate control of the detection result can be facilitated.
Description
Technical Field
The invention relates to the technical field of radio, in particular to an electromagnetic wave signal management system and method for an anechoic chamber.
Background
Patent CN110542809B discloses a method for testing radio frequency electromagnetic field radiation immunity of a transmission type electronic device, which comprises the following steps: placing a plurality of devices to be tested in an anechoic chamber, and mutually isolating the plurality of devices to be tested by using an isolating plate; a transmitting antenna is arranged in the anechoic chamber, and electromagnetic waves emitted by the transmitting antenna are focused; adjusting the advancing direction of electromagnetic waves, sequentially aligning a plurality of devices to be tested, and sequentially detecting single devices to be tested; when the transmitting direction of the transmitting antenna is aligned with different devices to be tested, the focusing degree is adjusted according to the preset electromagnetic intensity, and the focusing degree and the electromagnetic intensity are arranged in positive correlation; the reflection degree of the isolation plate on the electromagnetic wave emitted by the transmitting antenna is adjusted, and the reflection degree and the electromagnetic intensity are arranged in positive correlation; the test device has the advantage of being capable of rapidly and accurately performing the test. In the process of detecting the equipment to be detected, the shielding performance of the anechoic chamber is not detected, the anechoic chamber serves as an unknown environmental factor, and the testing process and the accurate control of the result of the equipment to be detected are not performed.
Patent CN203894401U discloses a signal detection system applied to anechoic chamber, comprising a preamplifier, a signal processing device, a comb signal generator, a transmitting antenna and a receiving antenna, wherein the comb signal generator is connected with the transmitting antenna, and the receiving antenna is connected with the signal processing device through the preamplifier. The signal detection system generates electromagnetic wave signals by connecting the comb signal generator with the transmitting antenna, can continuously transmit signals in full frequency range at the same time, and has fixed signal amplitude of each frequency point. The comb signal generator is not required to be connected with the signal processing device, so that signal attenuation can be reduced, and further, the accuracy of signal testing is improved. The maintenance mode for the performance (reducing signal attenuation) of the anechoic chamber is performed by adjusting an internal signal source, and does not involve feedback of a system result after the response of the adjusted signal source, so that the performance of the anechoic chamber after the adjustment is not evaluated exactly.
Based on the above-mentioned related art and combined with the practical requirements regarding the shielding performance of the anechoic chamber, how to design a system for detecting the shielding performance of the anechoic chamber is a technical problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electromagnetic wave signal management system and method for an anechoic chamber, which can detect the shielding effectiveness of the anechoic chamber.
In order to solve the technical problems, the first aspect of the invention discloses an electromagnetic wave signal management system for an anechoic chamber, the management system comprises a performance detection module, a first signal generation module and a spectrum analysis module which are respectively and electrically connected with the performance detection module, the first signal generation module is also electrically connected with a transmitting antenna, the spectrum analysis module is also electrically connected with a receiving antenna, the management system also comprises a detection result output module which is electrically connected with the performance detection module,
wherein the performance detection module is used for detecting the shielding effectiveness of the anechoic chamber, the transmitting antenna and the receiving antenna are oppositely arranged in the anechoic chamber, an interference signal source used for transmitting interference electromagnetic wave signals is arranged outside the anechoic chamber,
the performance detection module performs detection steps including:
the performance detection module controls the first signal generation module to generate a first detection signal and outputs the first detection signal through the transmitting antenna;
the performance detection module acquires a first feedback signal, which is received by the receiving antenna and is related to the first detection signal, through the frequency spectrum analysis module;
the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal;
and the performance detection module judges whether the detection shielding effectiveness is greater than or equal to a predetermined shielding effectiveness threshold, if yes, the performance detection module controls the detection result output module to output first result information indicating that the shielding effectiveness of the anechoic chamber passes detection, and if not, the performance detection module controls the detection result output module to output second result information indicating that the shielding effectiveness of the anechoic chamber does not pass detection.
In the electromagnetic wave signal management system for an anechoic chamber disclosed in the first aspect of the present invention, when an interference signal source is disposed outside the anechoic chamber, the first signal generating module generates a first detection signal and outputs the first detection signal through the transmitting antenna; the spectrum analysis module acquires a first feedback signal about a first detection signal received by a receiving antenna; and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, and judges whether the shielding effectiveness of the anechoic chamber passes the detection. The shielding performance of the anechoic chamber can be timely detected and timely adjusted according to the requirement, so that the reliability of the shielding performance of the anechoic chamber can be improved, and the follow-up detection process of equipment to be detected and the accurate control of the detection result can be facilitated.
As an alternative embodiment, in the present invention, the anechoic chamber is provided with one or a combination of more than one of an electromagnetic shielding door, a cut-off waveguide, a filter and a grounding device.
In an optional implementation manner, in the present invention, the performance detection module determines, according to the first detection signal and the first feedback signal, a detection shielding effectiveness of the anechoic chamber, and specifically includes:
the performance detection module acquires the attribute information of the transmission signal of the first detection signal;
the performance detection module acquires feedback signal attribute information of the first feedback signal;
the performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the transmitted signal attribute information and the feedback signal attribute information;
and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the electromagnetic signal loss parameter and the emission signal attribute information in the anechoic chamber.
In an alternative embodiment, the attribute information of the transmitting signal includes the magnetic field intensity of the transmitting antenna
Electric field strength at the side of the transmitting antenna>
Transmit power of a transmit antenna>
The feedback signal attribute information includes magnetic field strength of the receiving antenna side>
Electric field strength on the side of the receiving antenna>
Reception power of a reception antenna>
；
The performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the transmitted signal attribute information and the feedback signal attribute information, and the electromagnetic signal loss parameters are as follows:
in the method, in the process of the invention,
for the loss of the magnetic field intensity of the electromagnetic signal in the anechoic chamber,/the loss of the magnetic field intensity of the electromagnetic signal in the anechoic chamber>
For the loss of the electromagnetic signal electric field intensity in the anechoic chamber, < >>
For the electromagnetic signal power in the anechoic chamberLoss amount;
and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the electromagnetic signal loss parameter and the emission signal attribute information in the anechoic chamber, and specifically comprises the following steps:
solving the propagation efficiency of the magnetic field intensity of the electromagnetic signal in the anechoic chamber
The following are provided:
solving the electric field intensity propagation efficiency of the electromagnetic signal in the anechoic chamber
The following are provided:
solving the electromagnetic signal power transmission efficiency in the anechoic chamber
The following are provided:
the detection shielding effectiveness S of the anechoic chamber is obtained as follows:
in the method, in the process of the invention,
estimated bias for detection shielding effectiveness of the anechoic chamber, < >>
、
、
The electromagnetic signal magnetic field intensity propagation efficiency coefficient, the electromagnetic signal electric field intensity propagation efficiency coefficient and the electromagnetic signal power propagation efficiency coefficient in the electric wave dark room are respectively.
As an optional implementation manner, the management system further comprises a signal type identification module, wherein the signal type identification module is used for determining a target electromagnetic wave signal type in the anechoic chamber according to one or more of wavelength, frequency and/or power, and the electromagnetic wave signal type comprises a communication type or a charging type.
In an alternative embodiment, the management system further comprises a second signal generating module arranged in the anechoic chamber, wherein the second signal generating module is used for generating an electromagnetic wave signal with same frequency interference,
when the signal type identification module determines that the type of the target electromagnetic wave signal in the anechoic chamber is a communication type, the second signal generation module generates an interference electromagnetic wave signal with the same frequency as the target electromagnetic wave signal so as to be used for detecting the anti-interference performance of the target electromagnetic wave signal.
The second aspect of the present invention discloses an electromagnetic wave signal management method for an anechoic chamber, which is used in the management system as described in the first aspect of the present invention, wherein the management method comprises:
the performance detection module controls the first signal generation module to generate a first detection signal and outputs the first detection signal through the transmitting antenna;
the performance detection module acquires a first feedback signal, which is received by the receiving antenna and is related to the first detection signal, through the frequency spectrum analysis module;
the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal;
and the performance detection module judges whether the detection shielding effectiveness is greater than or equal to a predetermined shielding effectiveness threshold, if yes, the performance detection module controls the detection result output module to output first result information indicating that the shielding effectiveness of the anechoic chamber passes detection, and if not, the performance detection module controls the detection result output module to output second result information indicating that the shielding effectiveness of the anechoic chamber does not pass detection.
In the electromagnetic wave signal management method for an anechoic chamber disclosed in the second aspect of the present invention, when an interference signal source is disposed outside the anechoic chamber, the first signal generating module generates a first detection signal and outputs the first detection signal through the transmitting antenna; the spectrum analysis module acquires a first feedback signal about a first detection signal received by a receiving antenna; and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, and judges whether the shielding effectiveness of the anechoic chamber passes the detection. The shielding performance of the anechoic chamber can be timely detected and timely adjusted according to the requirement, so that the reliability of the shielding performance of the anechoic chamber can be improved, and the follow-up detection process of equipment to be detected and the accurate control of the detection result can be facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electromagnetic wave signal management system for an anechoic chamber according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the relative positions of an interference signal source, a transmitting antenna and a receiving antenna according to an embodiment of the present invention;
FIG. 3 is a flow chart of control performed by the performance detection module according to an embodiment of the present invention;
fig. 4 is a flow chart of the sub-steps in step S103 in the embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not limited to the list of steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
As shown in fig. 1, the electromagnetic wave signal management system for an anechoic chamber according to the first aspect of the present invention includes a performance detection module, a first signal generation module and a spectrum analysis module, wherein the first signal generation module and the spectrum analysis module are respectively electrically connected with the performance detection module, the first signal generation module is further electrically connected with a transmitting antenna, the spectrum analysis module is further electrically connected with a receiving antenna, and the management system further includes a detection result output module electrically connected with the performance detection module. The performance detection module is used for detecting shielding effectiveness of the anechoic chamber, the transmitting antenna and the receiving antenna are oppositely arranged in the anechoic chamber, and an interference signal source used for transmitting interference electromagnetic wave signals is further arranged outside the anechoic chamber.
Optionally, in order to enhance the anti-interference capability of the anechoic chamber, the anechoic chamber is provided with one or a combination of more of an electromagnetic shielding door, a cut-off waveguide, a filter and a grounding device.
The performance detection module performs detection steps including:
s101, the performance detection module controls the first signal generation module to generate a first detection signal and outputs the first detection signal through the transmitting antenna.
S102, the performance detection module acquires a first feedback signal about the first detection signal received by the receiving antenna through the spectrum analysis module.
S103, the performance detection module determines detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal.
S104, the performance detection module judges whether the detected shielding effectiveness is greater than or equal to a predetermined shielding effectiveness threshold, if yes, the step S105a is executed, and if not, the step S105b is executed.
S105a, the performance detection module controls the detection result output module to output first result information which indicates that the shielding effectiveness of the anechoic chamber passes through detection.
S105b, the performance detection module controls the detection result output module to output second result information which indicates that shielding effectiveness detection of the anechoic chamber is not passed.
In the electromagnetic wave signal management system for an anechoic chamber disclosed in the first aspect of the present invention, when an interference signal source is disposed outside the anechoic chamber, the first signal generating module generates a first detection signal and outputs the first detection signal through the transmitting antenna; the spectrum analysis module acquires a first feedback signal about a first detection signal received by a receiving antenna; and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, and judges whether the shielding effectiveness of the anechoic chamber passes the detection. The shielding performance of the anechoic chamber can be timely detected and timely adjusted according to the requirement, so that the reliability of the shielding performance of the anechoic chamber can be improved, and the follow-up detection process of equipment to be detected and the accurate control of the detection result can be facilitated.
Optionally, step S103 may determine an electromagnetic signal loss parameter in the anechoic chamber based on the difference between the first detection signal and the first feedback signal, and specifically may include the following operations:
s1031, the performance detection module acquires the transmitted signal attribute information of the first detection signal.
Further alternatively, the transmit signal attribute information may be related attribute information for measuring the transmit signal strength and/or coverage, such as power, wavelength, etc. of the transmit signal.
S1032, the performance detection module acquires feedback signal attribute information of the first feedback signal.
Further alternatively, the feedback signal attribute information may be related attribute information for measuring the strength and/or coverage of the feedback signal, such as power, wavelength, etc. of the feedback signal.
S1033, the performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the transmitted signal attribute information and the feedback signal attribute information.
Further alternatively, the electromagnetic signal loss parameter in the anechoic chamber may be determined by comparing the transmitted signal attribute information with the feedback signal attribute information and determining a deviation of the two with respect to the total amount of energy.
S1034, the performance detection module determines detection shielding effectiveness of the anechoic chamber according to electromagnetic signal loss parameters and emission signal attribute information in the anechoic chamber.
Further alternatively, the efficiency of signal transmission occurring in the case that the transmitting antenna and the receiving antenna have an interference signal in the anechoic chamber space environment and outside the anechoic chamber can be measured by the ratio between the electromagnetic signal loss parameter and the energy of the transmitting signal, so as to represent the detection shielding efficiency.
Still further alternatively, the detection shielding effectiveness of the anechoic chamber may be obtained by a plurality of parameters related to electromagnetic wave signal transmission between the transmitting antenna and the receiving antenna, so as to facilitate comprehensive and representative detection shielding effectiveness of the anechoic chamber. In particular, the attribute information of the transmitted signal used may include the magnetic field strength at the side of the transmitting antenna
Electric field strength at the side of the transmitting antenna>
Transmit power of a transmit antenna>
The feedback signal attribute information used may include magnetic field strength on the side of the receiving antenna>
Electric field strength on the side of the receiving antenna>
Received power of a receiving antenna
。
The performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the attribute information of the emission signal and the attribute information of the feedback signal, and the parameters are as follows:
in the method, in the process of the invention,
is the loss of the magnetic field intensity of the electromagnetic signal in the anechoic chamber, < >>
Is the loss of electromagnetic signal electric field intensity in the anechoic chamber, < ->
The power loss of the electromagnetic signal in the anechoic chamber is measured;
and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the electromagnetic signal loss parameter and the emission signal attribute information in the anechoic chamber, and specifically comprises the following steps:
obtaining the magnetic field intensity propagation efficiency of electromagnetic signals in the anechoic chamber
The following are provided:
obtaining the electric field intensity propagation efficiency of electromagnetic signals in the anechoic chamber
The following are provided:
obtaining electricityElectromagnetic signal power propagation efficiency in a dark wave chamber
The following are provided:
the detection shielding effectiveness S of the anechoic chamber is obtained as follows:
in the method, in the process of the invention,
estimated bias for shielding effectiveness of anechoic chamber detection, +.>
、
、
The electromagnetic signal magnetic field intensity propagation efficiency coefficient, the electromagnetic signal electric field intensity propagation efficiency coefficient and the electromagnetic signal power propagation efficiency coefficient in the electric wave dark room are respectively. Optionally, a->
The value range can be determined by multiple tests performed under specific application scenarios according to the management system, for example, the accuracy requirement of shielding effectiveness of the anechoic chamber is required to be within ∈>
Within a range of (a), then->
. Optionally, a->
、
、
The detection shielding effectiveness change of the anechoic chamber can be determined by fitting a scatter diagram formed by a plurality of test data.
Further alternatively, the determination may be based on machine learning
、
、
And the value of beta. Specifically, a model can be built as follows:
Still further alternatively, the above mentioned values for the detection mask efficacy S may be used as a training set, which may be translated into an optimization problem, and then the loss function is defined as follows:
wherein,,
is the predicted value for the ith sample, < +.>
Is the true value of the i-th sample.
The solved objective can be converted into a method for minimizing the value of the loss function through multiple iterations and taking the corresponding value
、
、
The value of (2) is substituted into a formula for obtaining the detection shielding effectiveness S of the anechoic chamber.
Optionally, the management system may further classify the types of the target electromagnetic wave signals in the anechoic chamber so as to effectively manage the different types of electromagnetic wave signals, and in particular, the management system may further include a signal type identification module for determining the types of the target electromagnetic wave signals in the anechoic chamber according to one or more of a combination of wavelength, frequency and/or power, wherein the types of the electromagnetic wave signals include a communication type or a charging type.
Further optionally, the integrity of the communication information carried by the communication target electromagnetic wave signal needs to be paid special attention, and therefore, the anti-interference performance of the communication target electromagnetic wave signal needs to be detected in a targeted manner. Specifically, the management system also comprises a second signal generation module arranged in the anechoic chamber, the second signal generation module is used for generating the same-frequency interference electromagnetic wave signal,
when the signal type identification module determines that the type of the target electromagnetic wave signal in the anechoic chamber is a communication type, the second signal generation module generates an interference electromagnetic wave signal with the same frequency as the target electromagnetic wave signal so as to be used for detecting the anti-interference performance of the target electromagnetic wave signal.
An electromagnetic wave signal management method for an anechoic chamber according to a second aspect of the present invention is used in the management system described in the first aspect of the present invention, wherein the management method includes:
the performance detection module acquires a first feedback signal about a first detection signal received by a receiving antenna through the frequency spectrum analysis module;
the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal;
the performance detection module judges whether the detection shielding effectiveness is larger than or equal to a predetermined shielding effectiveness threshold, if yes, the performance detection module controls the detection result output module to output first result information indicating that the shielding effectiveness of the anechoic chamber passes through detection, and if not, the performance detection module controls the detection result output module to output second result information indicating that the shielding effectiveness of the anechoic chamber does not pass through detection.
In the electromagnetic wave signal management method for an anechoic chamber disclosed in the second aspect of the present invention, when an interference signal source is disposed outside the anechoic chamber, the first signal generating module generates a first detection signal and outputs the first detection signal through the transmitting antenna; the spectrum analysis module acquires a first feedback signal about a first detection signal received by a receiving antenna; and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, and judges whether the shielding effectiveness of the anechoic chamber passes the detection. The shielding performance of the anechoic chamber can be timely detected and timely adjusted according to the requirement, so that the reliability of the shielding performance of the anechoic chamber can be improved, and the follow-up detection process of equipment to be detected and the accurate control of the detection result can be facilitated.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Finally, it should be noted that: the embodiment of the invention discloses an electromagnetic wave signal management system and method for an anechoic chamber, which are disclosed by the embodiment of the invention only as the preferred embodiment of the invention, and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. An electromagnetic wave signal management system for anechoic chamber is characterized in that the management system comprises a performance detection module, a first signal generation module and a spectrum analysis module which are respectively and electrically connected with the performance detection module, wherein the first signal generation module is also electrically connected with a transmitting antenna, the spectrum analysis module is also electrically connected with a receiving antenna, the management system also comprises a detection result output module which is electrically connected with the performance detection module,
wherein the performance detection module is used for detecting the shielding effectiveness of the anechoic chamber, the transmitting antenna and the receiving antenna are oppositely arranged in the anechoic chamber, an interference signal source used for transmitting interference electromagnetic wave signals is arranged outside the anechoic chamber,
the performance detection module performs detection steps including:
the performance detection module controls the first signal generation module to generate a first detection signal and outputs the first detection signal through the transmitting antenna;
the performance detection module acquires a first feedback signal, which is received by the receiving antenna and is related to the first detection signal, through the frequency spectrum analysis module;
the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal;
and the performance detection module judges whether the detection shielding effectiveness is greater than or equal to a predetermined shielding effectiveness threshold, if yes, the performance detection module controls the detection result output module to output first result information indicating that the shielding effectiveness of the anechoic chamber passes detection, and if not, the performance detection module controls the detection result output module to output second result information indicating that the shielding effectiveness of the anechoic chamber does not pass detection.
2. The electromagnetic wave signal management system for an anechoic chamber according to claim 1, wherein the anechoic chamber is provided with a combination of one or more of an electromagnetic shielding gate, a cut-off waveguide, a filter, and a grounding device.
3. The electromagnetic wave signal management system for anechoic chamber according to claim 2, wherein the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal, specifically comprising:
the performance detection module acquires the attribute information of the transmission signal of the first detection signal;
the performance detection module acquires feedback signal attribute information of the first feedback signal;
the performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the transmitted signal attribute information and the feedback signal attribute information;
and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the electromagnetic signal loss parameter and the emission signal attribute information in the anechoic chamber.
4. The electromagnetic wave signal management system for anechoic chamber according to claim 3, wherein the transmission signal attribute information includes a magnetic field strength at a side of a transmission antenna
Electric field strength at the side of the transmitting antenna>
Transmit power of a transmit antenna>
The feedback signal attribute information includes magnetic field strength of the receiving antenna side>
Electric field strength on the side of the receiving antenna>
Reception power of a reception antenna>
；
The performance detection module determines electromagnetic signal loss parameters in the anechoic chamber according to the transmitted signal attribute information and the feedback signal attribute information, and the electromagnetic signal loss parameters are as follows:
in the method, in the process of the invention,
for the loss of the magnetic field intensity of the electromagnetic signal in the anechoic chamber,/the loss of the magnetic field intensity of the electromagnetic signal in the anechoic chamber>
For the loss of the electromagnetic signal electric field intensity in the anechoic chamber, < >>
The electromagnetic signal power loss in the anechoic chamber is calculated;
and the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the electromagnetic signal loss parameter and the emission signal attribute information in the anechoic chamber, and specifically comprises the following steps:
solving the propagation efficiency of the magnetic field intensity of the electromagnetic signal in the anechoic chamber
The following are provided:
solving the electric field intensity propagation efficiency of the electromagnetic signal in the anechoic chamber
The following are provided:
solving the electromagnetic signal power transmission efficiency in the anechoic chamber
The following are provided:
the detection shielding effectiveness S of the anechoic chamber is obtained as follows:
in the method, in the process of the invention,
estimated bias for detection shielding effectiveness of the anechoic chamber, < >>
、
、
The electromagnetic signal magnetic field intensity propagation efficiency coefficient, the electromagnetic signal electric field intensity propagation efficiency coefficient and the electromagnetic signal power propagation efficiency coefficient in the electric wave dark room are respectively.
5. The electromagnetic wave signal management system for anechoic chambers according to claim 1, further comprising a signal type identification module for determining a target electromagnetic wave signal type within the anechoic chamber according to one or more combinations of wavelength, frequency and/or power, wherein the electromagnetic wave signal type comprises a communication class or a charging class.
6. The electromagnetic wave signal management system for anechoic chamber according to claim 5, wherein the management system further comprises a second signal generating module provided in the anechoic chamber for generating an co-channel interference electromagnetic wave signal,
when the signal type identification module determines that the type of the target electromagnetic wave signal in the anechoic chamber is a communication type, the second signal generation module generates an interference electromagnetic wave signal with the same frequency as the target electromagnetic wave signal so as to be used for detecting the anti-interference performance of the target electromagnetic wave signal.
7. An electromagnetic wave signal management method for an anechoic chamber, characterized in that the management method is used in the management system according to claim 6, wherein the management method comprises:
the performance detection module controls the first signal generation module to generate a first detection signal and outputs the first detection signal through the transmitting antenna;
the performance detection module acquires a first feedback signal, which is received by the receiving antenna and is related to the first detection signal, through the frequency spectrum analysis module;
the performance detection module determines the detection shielding effectiveness of the anechoic chamber according to the first detection signal and the first feedback signal;
and the performance detection module judges whether the detection shielding effectiveness is greater than or equal to a predetermined shielding effectiveness threshold, if yes, the performance detection module controls the detection result output module to output first result information indicating that the shielding effectiveness of the anechoic chamber passes detection, and if not, the performance detection module controls the detection result output module to output second result information indicating that the shielding effectiveness of the anechoic chamber does not pass detection.
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