CN114696113A - Cylindrical array antenna layout method and device, cylindrical array security inspection method and system - Google Patents
Cylindrical array antenna layout method and device, cylindrical array security inspection method and system Download PDFInfo
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Abstract
The disclosure relates to a cylindrical surface array antenna layout method and device, and a cylindrical surface array security inspection method and system, wherein the method comprises the following steps: determining array parameters of the cylinder array; dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays; and according to a layout strategy, a plurality of array elements are laid out in the subarray, wherein the array elements comprise transmitting array elements and receiving array elements. The embodiment of the invention can realize frequency division multiplexing by using different frequencies transmitted by different array elements at the same time, and improve the data acquisition efficiency.
Description
Technical Field
The present disclosure relates to the field of antenna layout technologies, and in particular, to a cylindrical array antenna layout method and apparatus, and a cylindrical array security inspection method and system.
Background
Relevant research institutions and enterprises all over the world place great importance on the research work of security equipment; the cylindrical array is favored by people in the field of security inspection by virtue of the advantages of full orientation, high resolution, transmission imaging, low radiation and the like.
The existing cylindrical array generally collects radar echo data through a mechanical moving linear array, the data acquisition time is relatively long, and the application in the area with large flow of people is limited to a certain extent.
Disclosure of Invention
The invention provides a cylindrical array antenna layout method and device, and a cylindrical array security inspection method and system.
According to an aspect of the present disclosure, there is provided a cylinder array antenna layout method, including:
determining array parameters of the cylinder array;
dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays;
and according to a layout strategy, a plurality of array elements are laid out in the subarray, wherein the array elements comprise transmitting array elements and receiving array elements.
In some possible embodiments, the determining the array parameter of the cylinder array includes:
determining a height and a radius of the cylinder array;
acquiring a horizontal included angle of an area array included in the cylindrical surface array;
and acquiring channel parameters among the area arrays.
In some possible embodiments, the dividing the cylinder array according to the array parameter to form a sub-array set including a plurality of sub-arrays includes:
uniformly dividing the cylindrical surface array into a plurality of sub-arrays according to the height and horizontal included angle in the array parameters, wherein the sub-arrays comprise the plurality of array element grids;
and forming the sub-array set by using the plurality of sub-arrays.
In some possible embodiments, the laying out a plurality of array elements in the sub-array according to the laying out policy includes:
uniformly dividing the subarray into a plurality of array element grids for the subarray parameters of the subarray;
and according to a preset strategy, arranging the corresponding array elements into the array element grids.
In some possible embodiments, the method further comprises:
optimizing the layout of the cylinder array.
According to a second aspect of the present disclosure, there is provided a cylindrical array security inspection method, including:
generating electrical signals of a plurality of frequency bands;
inputting at least one electrical signal to a sub-array constructed by the method for arranging a cylindrical array antenna according to any one of the first aspect, transmitting an electromagnetic wave corresponding to the electrical signal, and receiving an echo signal of the electromagnetic wave;
and preprocessing the electromagnetic wave and storing the preprocessed signal.
According to a third aspect of the present disclosure, there is provided a cylinder array antenna layout apparatus comprising:
the determining module is used for determining array parameters of the cylinder array;
the dividing module is used for dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays;
and the layout module is used for laying out a plurality of array elements in the subarray according to a layout strategy, wherein the array elements comprise transmitting array elements and receiving array elements.
According to a fourth aspect of the present disclosure, there is provided a cylinder array security inspection system comprising:
the signal generating module is used for generating electric signals of a plurality of frequency bands;
a cylindrical array antenna, which is formed by the layout method of the cylindrical array antenna in any one of the first aspect;
the switch module is connected between the signal generation module and the cylindrical array antenna and used for sending at least one electric signal to the cylindrical array antenna, generating an electromagnetic wave and receiving an echo signal of the electromagnetic wave;
and the data storage module is used for preprocessing the electromagnetic waves and storing the preprocessed signals.
According to a fifth aspect of the present disclosure, there is provided an electronic device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to invoke the memory-stored instructions to perform the method of any one of the first and second aspects.
According to a sixth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of any one of the first and second aspects.
In the embodiment of the present disclosure, the area array in the cylindrical array may be divided into a plurality of sub-arrays, each sub-array has a plurality of array element squares, and the transmitting or receiving array elements may be arranged in the array element squares according to different requirements. The embodiment of the disclosure can conveniently realize a cylindrical array frequency division orthogonal transceiving mode, improve the utilization rate of the array elements, reduce the number of the array elements and reduce the data acquisition time.
The embodiment of the disclosure adopts a cylindrical surface array frequency division orthogonal transceiving mode, and the time for transceiving signals can be greatly shortened through the frequency division orthogonal transceiving mode; the conventional security inspection mode adopts a single or two linear arrays (non-cylindrical arrays), emits sweep frequency signals or frequency modulation continuous wave signals, and adopts a mechanical scanning working mode to carry out data acquisition; the invention can greatly improve the data acquisition speed, and the acquisition time is far shorter than that of the conventional cylindrical surface security inspection radar.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 illustrates a flow diagram of a cylindrical array antenna layout method in accordance with an embodiment of the present disclosure;
FIG. 2 shows a schematic diagram of a cylindrical array antenna;
fig. 3 illustrates a flowchart of step S20 in a cylindrical antenna layout method according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating the effect of area array partitioning according to an embodiment of the present disclosure;
fig. 5 shows a flowchart of step S30 in a cylindrical antenna layout method according to an embodiment of the present disclosure;
FIG. 6 illustrates a cylindrical array representation of an area array in accordance with an embodiment of the present disclosure;
FIG. 7 is a schematic diagram showing the spread of the element distribution of the area array;
FIG. 8 illustrates a flow chart of a method for cylindrical array antenna layout optimization in accordance with an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of the phase error between quasi-single and dual stations;
FIG. 10 shows a block diagram of a cylinder array security inspection system according to an embodiment of the present disclosure;
fig. 11 illustrates a block diagram of a cylinder array antenna layout apparatus in accordance with an embodiment of the present disclosure;
FIG. 12 shows a block diagram of a cylinder array security inspection system according to an embodiment of the present disclosure;
FIG. 13 is a block diagram illustrating an electronic device 800 in accordance with an exemplary embodiment;
fig. 14 is a block diagram illustrating an electronic device 1900 in accordance with an example embodiment.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
The main body of the implementation of the cylinder array antenna layout method may be an information processing apparatus, and may be implemented by a terminal device or a server or other processing device, where the terminal device may be a User Equipment (UE), a mobile device, a User terminal, a cellular phone, a cordless phone, a Personal Digital Assistant (PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, or the like. In some possible implementations, the method may be implemented by a processor invoking computer readable instructions stored in a memory.
At present, the traditional cylindrical surface array has the following defects: the traditional cylindrical array acquires data in a mechanical scanning mode, so that the data acquisition time is relatively long; in the fields of cylindrical array antenna layout and cylindrical array antenna optimization, research results are relatively few. Accordingly, the disclosed embodiments provide a cylindrical array antenna layout method.
Fig. 1 shows a flow chart of a method for arranging a cylindrical array antenna according to an embodiment of the present disclosure, and fig. 2 shows a schematic structural diagram of the cylindrical array antenna. As shown in fig. 1, the method for arranging the cylindrical array antenna includes:
s10: determining array parameters of the cylinder array;
s20: dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays;
s30: and according to a layout strategy, a plurality of array elements are laid out in the subarrays, wherein the array elements comprise transmitting array elements and receiving array elements.
In some possible embodiments, the determining the array parameter of the cylinder array includes: determining the height and radius of the cylindrical array; acquiring a horizontal included angle of an area array included in the cylindrical surface array; and acquiring channel parameters among the area arrays.
In the embodiment of the present disclosure, the cylindrical array antenna may include at least two area arrays, as shown in fig. 2, including a first area array 401 and a second area array 402, and a channel 403 is further formed between the first area array 401 and the second area array 402. In the embodiment of the present disclosure, the array parameters of the cylindrical array may include a height of the cylindrical array, a horizontal included angle of an area array included in the cylindrical array, a radius, and the like, and may further include parameters of a height of a channel, a distance between the first area array and the second area array, and the disclosure does not specifically limit this. The horizontal included angle of the area array is an included angle between two vertexes of the edge of the area array and a connecting line of the centers of the cylindrical surfaces. As shown in fig. 2, in the embodiment of the present disclosure, the array parameters may include a height H, a radius R, and a horizontal included angle Θ of the area arrays, and in addition, the horizontal included angles of the area arrays in the cylindrical surface array may be the same, which is not specifically limited by the present disclosure.
In the case of determining the array parameters of the cylinder array, the cylinder array may be divided into a plurality of sub-arrays, each sub-array having a plurality of array element squares, and the transmitting array elements or the receiving array elements may be arranged in the array element squares according to a set layout strategy.
Fig. 3 shows a flowchart of step S20 in the cylindrical antenna layout method according to the embodiment of the present disclosure, and fig. 4 shows a schematic diagram of the effect of area array division according to the embodiment of the present disclosure. As shown in fig. 3, the dividing the cylindrical array according to the array parameters to form a sub-array set including a plurality of sub-arrays includes:
s21: uniformly dividing the cylindrical surface array into a plurality of sub-arrays according to the height and horizontal included angle in the array parameters, wherein the sub-arrays comprise a plurality of array element grids;
s22: and forming the sub-array set by using the plurality of sub-arrays.
First, according to the height H of the cylinder array, the array surface of the cylinder array may be divided into N in the height directionA(NA>1， NAIs an integer), the height of each portion is h, which can be expressed as:
According to the horizontal included angle theta of the area arrays (of the area arrays 401 and 402), the cylindrical surface array is divided into MAParts, the angle θ for each part can be expressed as:
Correspondingly, the first or second area array can be divided into NA×MAA sub-arrays of 2 XNA×MAAnd dividing the equal-size submatrix, wherein the height of each submatrix is h, and the horizontal included angle is theta.
Arranging all the Sub-arrays according to a certain sequence (for example, arranging the Sub-arrays in the sequence of anticlockwise, sending downwards and upwards) to construct a Sub-array set Sub, wherein the Sub-array set SubiRepresents the ith (i is less than or equal to A, i is a positive integer) sub-array.
Under the condition of obtaining A sub-arrays, a plurality of array elements can be laid out in the sub-arrays according to a layout strategy, wherein the array elements comprise transmitting array elements and receiving array elements.
Fig. 5 shows a flowchart of step S30 in the method for cylindrical array antenna layout according to the embodiment of the present disclosure. Wherein, according to the layout strategy, a plurality of array elements are laid out in the subarray, including:
s31: uniformly dividing the subarray into a plurality of array element grids for the subarray parameters of the subarray;
s32: and according to a preset strategy, arranging the corresponding array elements into the array element grids.
In some possible embodiments, the subarray may be divided into a plurality of grid cells. The subarray can be divided into array element grids according to the height and the horizontal included angle of the subarray, and the transmitting array elements and the receiving array elements are placed in the corresponding array element grids.
The layout strategy of the disclosed embodiment can include the number of divided NSAnd MsAnd the number of transmitting array elements and receiving array elements, the above parameters may be preset values, or may be the result of the optimal array element layout determined by the layout optimization method.
First, the height of the subarray may be divided into N, according to the height h of the subarraySThe height of each portion is h0Portion, h0Can be expressed as:
wherein, h is the Nyquist sampling theorem0It must satisfy: h is0≥△h0，△h0The sampling interval in the elevation direction is represented and is a preset system parameter.
Secondly, dividing the horizontal angle of the subarray into M according to the horizontal included angle theta of the subarraySThe horizontal included angle of each part is theta0，θ0Can be expressed as:
to satisfy the Nyquist sampling theorem, θ0It must satisfy: theta0≥△θ0。△θ0Are preset system parameters.
Through the configuration, each subarray is divided into a plurality of array element grids, and then the array elements can be arranged in the array element grids according to a preset strategy. The subarray is constructed to comprise a first number of array element grids in the row direction and a second number of array element grids in the column direction;
according to a preset strategy, the method for arranging the corresponding array elements in the array element grids comprises the following steps:
when the first and second values are odd numbers, respectively arranging opposite array elements on the middle row and the middle column, and arranging a receiving array element or a transmitting array element in the array element grid at the center of the sub-array (refer to fig. 6(a) and (b)); when the first and/or second numerical values are even numbers, two middle rows in the row direction and two middle columns in the column direction of the grid with even number of array elements are respectively provided with opposite array elements, and the intersection region is provided with a receiving array element or a transmitting array element (refer to fig. 6(c) and (d)).
Dividing each subarray into NS×MSA square grid of array elements, and a transmitting array element and a receiving array element are placed, as shown in fig. 5; if M isSAnd NSAs shown in (a) and (b) of fig. 6, in the figure, "T" indicates placement of a transmitting array element, "R" indicates placement of a receiving array element, and "T/R" indicates placement of a transmitting array element or a receiving array element; if M isSOr NSIf it is even, the array elements are arranged in the middle of 2 columns/rows, as shown in (c), (d) of fig. 6; therefore, the number n of the transmitting array elements can be knownTAnd the number n of receiving array elementsR(ii) a Taking the first layout method (fig. 6(a)) as an example, the overall array element layout development diagram is shown in the area array element distribution development diagram shown in fig. 7.
Based on the above arrangement of the array elements in the cylindrical array can be completed, a cylindrical array frequency division orthogonal transceiving mode can be adopted, the utilization rate of the array elements is improved, the number of the array elements is reduced, and the data acquisition time is shortened.
In addition, the layout of the cylindrical array antenna may also be optimized in the embodiments of the present disclosure, and fig. 8 is a flowchart illustrating a method for optimizing the layout of the cylindrical array antenna according to an embodiment of the present disclosure, where the method for optimizing the layout may include:
s100: determining a selected optimization condition;
s200: and determining the optimal array element layout of the receiving array elements and the transmitting array elements in the cylindrical array by using the parameters meeting the optimization conditions and the optimized and constructed optimization model.
Wherein the determined optimization condition may include: phase error optimization conditions and/or aperture illumination range optimization conditions. The selected optimization condition may be determined using pre-received selection information, which may be received by way of receiving input information transmitted by the input component or by way of receiving information wirelessly transmitted by other electronic devices.
In the case of determining the optimization conditions, the optimization condition pairs may be used to determine the optimal array element layout that satisfies the optimization model.
Wherein, the phase error optimization condition is that M is solved within the allowable range of the phase error between the quasi-single station and the quasi-double stationSAnd NSSo that the phase error is
Satisfy the requirements of
Indicating the maximum phase error.
In which the phase error between quasi-single station (equivalent phase center) and double stations (transmitting-receiving array element)
Can be expressed as:
wherein f isc＝fmax-fminRepresenting the center frequency and c the speed of light.
Wherein the coordinates of the target point P are (x, y, z), the emission distance R istAnd a reception distance RrCan be expressed as:
equivalent phase center (quasi-single station) Epc (R)e,θe,ze) The coordinates may be expressed as:
distance R between quasi-single station and target pointeCan be expressed as
In the case of the transmit and receive elements, as shown in figure 9, the coordinates of the target point P are shown as (x, y, z), assuming that the transmit element T is furthest aparttHas the coordinates of (R)t,θt,zt) Then receiving array element TrCoordinate (R) ofr,θr,zr) Can be expressed as
Taking the first layout (fig. 6(a)) as an example, the number of transmitting array elements nTAnd the number n of receiving array elementsRCan be expressed as
In addition, the embodiment of the disclosure can also calculate the number S of sampling pointsPTo obtain
Where ceil (#) represents an upward rounding function, Δ h0Representing the height-wise sampling interval, Δ θ0Representing the angular sampling interval.
Calculating the number of quasi-single stations (equivalent phase centers): calculating the equivalent phase center number S by using the following formulaEpc；
SEpc＝A*MS(NS-1)
Wherein A represents the number of subarrays.
In addition, under the condition that the selected optimization condition is the aperture irradiation range optimization condition, the array element layout optimization can be performed according to the aperture irradiation range. The array element irradiation range meets the following requirements:
wherein theta isuDenotes the maximum angle of illumination in the horizontal direction of the aperture, thetavRepresenting the maximum angle of illumination in the direction perpendicular to the aperture.
The optimization model constructed in the embodiment of the disclosure can be expressed as that the number of the array elements (the number of the transmitting array elements + the number of the receiving array elements) in each subarray is minimized by optimizing the number of the transmitting array elements and the receiving array elements of the subarray under the condition that the sampling points are not sparse, and the optimization model is expressed as the following formula;
wherein, under the condition of the parameters obtained by utilizing the phase error condition and/or the aperture irradiation range optimization condition, the optimal layout mode meeting the optimization model is determined. Specifically, an optimal layout mode can be obtained through an iterative optimization mode. Correspondingly, the number of transmitting array elements and receiving elements in the subarray and the division mode of the subarray can be obtained.
The embodiment of the disclosure adopts a cylindrical array frequency division orthogonal transceiving mode, improves the utilization rate of the array elements, reduces the number of the array elements and reduces the data acquisition time. The array antenna optimization method provided by the patent is characterized in that a sparse cylindrical array optimization model is constructed on the basis of the previous patent, and on the premise that sampling meets the sampling criterion, the optimal solution of sparse cylindrical array optimization is obtained, so that the number of array elements is greatly reduced.
In addition, the embodiment of the present disclosure further provides a cylindrical array security inspection method, where the method may include: generating electrical signals of a plurality of frequency bands; inputting at least one of the electrical signals to the sub-array constructed by the cylinder array antenna layout method described in the above embodiment, transmitting an electromagnetic wave corresponding to the electrical signal, and receiving an echo signal of the electromagnetic wave; and preprocessing the electromagnetic wave and storing a preprocessed signal. Specifically, system initialization is summarized; signal transmission; signal receiving and data storage.
In particular, fig. 10 shows a block diagram of a cylinder array security inspection system according to an embodiment of the present disclosure. The system comprises a central electronic equipment subsystem 01, a signal generation subsystem 02, a high-speed switch subsystem 03, an array antenna subsystem 04, a data storage subsystem 05 and a power supply protection subsystem 06; the subsystems have the following functions:
the central electronic equipment subsystem 01 mainly controls a signal generation subsystem 02, a high-speed switch subsystem 03 and a data storage subsystem 05; the central electronic equipment subsystem 01 controls the frequency generator 201 in the signal generation subsystem 02 to obtain Q parts of electric signals in different frequency bands, and then the central electronic equipment subsystem 01 selects A parts of signals in different frequency bands from the Q parts of different frequency bands through a frequency band distributor and transmits the signals to the high-speed switching subsystem; the central electronic equipment subsystem 01 selects a specific transmitting array element to transmit an electromagnetic wave signal by controlling the on-off of the high-speed switch subsystem 03; the central electronic device subsystem 01 controls the data preprocessing subsystem in the data storage subsystem 05 to preprocess the received data.
The signal generation subsystem 02 is composed of a frequency generator 201 and a frequency band divider; the frequency generator 201 is controlled by the central electronic equipment subsystem 01 according to the operating frequency ([ f ] of the systemmin,fmax]，fminIndicating the minimum operating frequency, f, of the systemmaxRepresenting the maximum operating frequency of the system) generates Q parts of electrical signals (f) of different frequency bands1,f2,…,fQ) (ii) a The frequency band divider 202 selects A (A is less than or equal to Q) parts of electric signals (f) from Q parts of electric signalsq1,fq2,…,fqA) And reassigning the selected signals; the signal generation subsystem 02 transmits the distributed electric signals to the array antenna subsystem 04 through the high-speed switch subsystem 03.
The high-speed switch subsystem 03 consists of A high-speed switches, and the principle of the high-speed switches is as shown in the specification; the high-speed switch subsystem 03 transmits the telecommunication number to corresponding transmitting array elements in different subarrays in the array antenna subsystem 04 by controlling the on-off mode of the high-speed switch under the control of the central electronic equipment subsystem 01.
As shown in fig. 2, the cylindrical array mainly includes an area array 401 and an area array 402; the array antenna subsystem is composed of an area array 401 and an area array 402, the horizontal included angle of each area array is theta, and the height of each area array is equal to the height H of the cylindrical surface array; dividing the area arrays 401 and 402 into a plurality of sub-arrays, as shown in fig. 3; the layout mode of each subarray array element is shown in fig. 4, and the layout development of the overall area arrays 401 and 402 are shown in fig. 5; the array antenna subsystem 04 is used for converting the signal generated by the signal generation subsystem into an electromagnetic wave, transmitting the electromagnetic wave, and receiving the echo signal.
The data storage subsystem 05 consists of a signal conversion subsystem 501, a data preprocessing subsystem 502 and a storage subsystem 503; the signal conversion subsystem 501 is used for filtering, amplifying and performing analog-to-digital conversion on signals received by the receiving array elements; the signal conversion subsystem 501 performs filtering processing on the signals received by the receiving array elements according to the signals transmitted by the frequency band distributor 202, then performs signal amplification processing on the filtered signals, and finally converts the signals subjected to filtering and signal amplification processing into electric signals, so that the receiving array elements of each sub-array only receive the signals transmitted by the transmitting array elements of the sub-array; the signal conversion subsystem 501 transmits the obtained data to the data preprocessing subsystem 502; the data preprocessing subsystem 502 rearranges the data in a frequency from small to large according to the frequency of the telecommunication number; and transmits the pre-processed signals to the storage subsystem 503 for storage.
And the power supply protection subsystem 06 is used for supplying power to each subsystem and providing power supply protection of overcurrent, overload, current quick-break, low voltage and the like.
For a single subarray, the transceiving mode is a one-transmitting multi-receiving mode, namely only one transmitting array element transmits signals each time, and receiving array elements of the same subarray receive signals; for the whole cylindrical surface array, a frequency division orthogonal transceiving mode is adopted, namely, the frequency bands transmitted by the transmitting array elements in different sub-arrays at the same time are different, so that frequency division multiplexing is realized, and the data acquisition time is shortened; the concrete implementation steps can be divided into the following steps,
step S1: initializing a system: the power supply protection subsystem 06 supplies power to the central electronic equipment subsystem 01, the signal generation subsystem 02, the high-speed switch subsystem 03, the array subsystem 04 and the data storage subsystem 05, detects whether each system is in an abnormal state, and initializes system parameters;
step S2 signal transmission: the method specifically comprises the steps of starting a corresponding transceiving channel, transmitting a signal, receiving a signal and processing an echo signal;
step S3 signal reception: the receiving array element receives the signal transmitted by the transmitting array element and is preprocessed by the data storage subsystem 05;
step S4 data storage: storing the signal S obtained in step S33 in the storage subsystem 503 through the data storage subsystem 05;
the power supply protection subsystem 06 supplies power to the central electronic equipment subsystem 01, the signal generation subsystem 02, the high-speed switch subsystem 03, the array subsystem 04 and the data storage subsystem 05, detects whether each system has an abnormal state, and initializes system parameters; the method comprises the following specific steps:
step S11: supplying power to the system; the subsystems (the central electronic equipment subsystem 01, the signal generation subsystem, the high-speed switch subsystem 03, the array antenna subsystem 04 and the data storage subsystem 05) are on, and otherwise, the subsystems are abnormal and the lamps are not on;
step S12: starting the system; starting subsystems (a central electronic equipment subsystem 01, a signal generation subsystem, a high-speed switch subsystem 03, an array antenna subsystem 04 and a data storage subsystem 05) and entering a working state;
step S13: initializing system parameters; order the transmitting array element i in operation T1, number of transmissions iS＝1。
At step S2: in the signal transmission, the corresponding transceiving channel is opened, signals are transmitted, signals are received, and echo signals are processed; the method comprises the following specific steps: step S21: opening a transmitting channel: according to the acquired transmitting array element i in workTStarting the first transmitting array element number i of each sub-arrayT(ii) a The ith of each subarray is turned on by the control switch subsystem 03 of the central electronic equipment subsystem 01TA transmitting array element;
step S22: transmitting a signal: central electronic device subsystem 01 control signal generation subsystem 02 frequency generator 201 generates Q-parts frequency band
The generated frequency band is distributed by a frequency band distributor 202 and transmitted to a corresponding transmitting array element i through a high-speed switching subsystem 03TThe transmitting array element is according to the obtained frequency band
The emission signal is as follows:
step S221: generating a frequency band; the central electronic equipment subsystem 01 controls the signal generation subsystem 02 frequency generator 201 to generate Q parts of frequency bands F, and transmits the obtained frequency bands F to the frequency band distributor 202;
step S222: frequency bandDistributing; according to the acquired frequency band F and the transmission times
Distribute it to high-speed switch subsystem 03, i-th switch network subsystem 03AThe frequency acquired by the high-speed switch can be expressed as
Meanwhile, the frequency band distributor also transmits the same distributed frequency band to the signal conversion subsystem in the data storage subsystem 05, the signal conversion subsystem 501 ithAThe frequency acquired by each signal converter can be expressed as equation (24);
step S223: transmitting a signal;
according to the frequency band f transmitted by the high-speed switching subsystem 03qiAnd selected transmitting array element iTCarry out signal transmission, therefore
Sub-array ithTThe signals transmitted by the transmitting array elements can be written as
In step S3, in the signal reception, the receiving array element receives the signal transmitted by the transmitting array element, and stores the signal by the data storage subsystem 05, which is as follows:
step S31: receiving a signal; all receiving array elements of the cylindrical array receive signals and pass through a signal conversion subsystem 501 in the signal storage subsystem 05, and the signal conversion subsystem 501 obtains the received signals and the obtained frequency fqiFiltering to make each sub-array only receive the signal transmitted by the sub-array; thus, first
Ith in the individual subarraysRA receiving array element is received by the ithTA transmitted signal, the expression of which can be written as
Wherein,
representing the channel (subarray)
Middle (i)TA transmitting array element and iRA channel composed of a plurality of receiving array elements) signal propagation time (which may also be referred to as signal delay time);
first, the
Signals received by all receiving array elements in a sub-array (by the ithTSignals transmitted by a transmitting array element) can be written as
Step S32: frequency cycling;
according to the number of times of transmission iSThe central electronic equipment subsystem 01 controls the cyclic transmission of different frequency bands fqiThe signal of (a); if the number of times of transmission iSWhen Q is less than or equal to Q, let iS＝iS+1, and return to step S2; otherwise, the loop is ended and the process proceeds to step S33, where the first step is obtained
Complete signal received by all receiving array elements in a sub-array (by ithTSignals transmitted by a transmitting array element) can be written as
Wherein f isq＝[FreqiA … FreqQ+iA]
Step S33: data preprocessing:
the signal to be acquired
The data is preprocessed by a data preprocessing subsystem 502 in the data storage subsystem 05, the preprocessing is rearranged according to the size of the frequency band,
sort () represents a sort function from small to large, thus resulting in
Wherein f is (f)min,fmax]Or f is e [ fmin,fmax)；
Step S34: and (3) transmitting array element circulation: according to the selected transmitting array element iTThe central electronic equipment subsystem 01 controls and selects different transmitting array elements; if iT≤nTThen let iT＝iT+1 and return to step S2; otherwise, the loop is ended and step S4 is entered, at which time the first step
The signals acquired by the subarray may be written as:
the signal received by the entire cylindrical array (all sub-arrays) can be represented as
Step S4: data storage
Storing the signal S obtained in step S33 in the storage subsystem 503 through the data storage subsystem 05;
the embodiment of the disclosure adopts a cylindrical surface array frequency division orthogonal transceiving mode, and the time for transceiving signals can be greatly shortened through the frequency division orthogonal transceiving mode; the conventional security inspection mode adopts a single linear array or two linear arrays (non-cylindrical arrays), frequency sweep signals or frequency modulation continuous wave signals are transmitted, and a mechanical scanning working mode is adopted for data acquisition; the invention can greatly improve the data acquisition speed, and the acquisition time is far shorter than that of the conventional cylindrical surface security inspection radar.
It will be understood by those skilled in the art that in the method of the present invention, the order of writing of each step in the method of the present invention does not imply a strict order of execution and should in any way limit the process of execution, and that the specific order of execution of each step should be determined by its function and possible inherent logic.
It is understood that the above-mentioned method embodiments of the present disclosure can be combined with each other to form a combined embodiment without departing from the logic of the principle, which is limited by the space, and the detailed description of the present disclosure is omitted.
In addition, the present disclosure also provides a cylindrical array antenna layout apparatus, a cylindrical array security inspection method system, an electronic device, a computer-readable storage medium, and a program, which can be used to implement any one of the cylindrical array antenna layout methods provided by the present disclosure, and the corresponding technical solutions and descriptions and corresponding descriptions of the method sections are omitted for brevity.
Fig. 11 shows a block diagram of a cylinder array antenna layout apparatus according to an embodiment of the present disclosure, which includes, as shown in fig. 12:
a determining module 10, configured to determine an array parameter of the cylinder array;
a dividing module 20, configured to divide the cylindrical surface array according to the array parameters to form a sub-array set including multiple sub-arrays;
and a layout module 30, configured to layout multiple array elements in the sub-array according to a layout strategy, where the array elements include a transmitting array element and a receiving array element.
Fig. 12 shows a block diagram of a cylindrical array security inspection system according to an embodiment of the present disclosure, which, as shown in fig. 13, includes:
a signal generating module 100, configured to generate electrical signals of multiple frequency bands;
a cylinder array antenna 200 formed by layout according to the cylinder array antenna layout method of any one of the first aspect;
the switch module 300 is connected between the signal generation module and the cylindrical array antenna, and is used for sending at least one electric signal to the cylindrical array antenna, generating an electromagnetic wave, and receiving an echo signal of the electromagnetic wave;
and a data storage module 400, configured to preprocess the electromagnetic wave and store the preprocessed signal.
In some embodiments, functions of or modules included in the apparatus provided in the embodiments of the present disclosure may be used to execute the method described in the above method embodiments, and specific implementation thereof may refer to the description of the above method embodiments, and for brevity, will not be described again here.
Embodiments of the present disclosure also provide a computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the above-mentioned method. The computer readable storage medium may be a non-volatile computer readable storage medium.
An embodiment of the present disclosure further provides an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured as the above method.
The electronic device may be provided as a terminal, server, or other form of device.
Fig. 13 is a block diagram illustrating an electronic device 800 in accordance with an example embodiment. For example, the electronic device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like terminal.
Referring to fig. 13, electronic device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.
The processing component 802 generally controls overall operation of the electronic device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 806 provides power to the various components of the electronic device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 800.
The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the electronic device 800 is in an operating mode, such as a shooting mode or a video mode. Each of the front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in memory 804 or transmitted via communications component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing status assessments of various aspects to the electronic device 800. For example, the sensor assembly 814 may detect an open/closed state of the electronic device 800, the relative positioning of components, such as a display and keypad of the electronic device 800, the sensor assembly 814 may also detect a change in the position of the electronic device 800 or a component of the electronic device 800, the presence or absence of user contact with the electronic device 800, orientation or acceleration/deceleration of the electronic device 800, and a change in the temperature of the electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the electronic device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium, such as the memory 804, is also provided that includes computer program instructions executable by the processor 820 of the electronic device 800 to perform the above-described methods.
Fig. 14 is a block diagram illustrating an electronic device 1900 according to an example embodiment. For example, the electronic device 1900 may be provided as a server. Referring to fig. 14, electronic device 1900 includes a processing component 1922 further including one or more processors and memory resources, represented by memory 1932, for storing instructions, e.g., application programs, that are executable by processing component 1922. The application programs stored in memory 1932 may include one or more modules each corresponding to a set of instructions. Further, the processing component 1922 is configured to execute instructions to perform the above-described method.
The electronic device 1900 may also include a power component 1926 configured to perform power management of the electronic device 1900, a wired or wireless network interface 1950 configured to connect the electronic device 1900 to a network, and an input/output (I/O) interface 1958. The electronic device 1900 may operate based on an operating system stored in memory 1932, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.
In an exemplary embodiment, a non-transitory computer readable storage medium, such as the memory 1932, is also provided that includes computer program instructions executable by the processing component 1922 of the electronic device 1900 to perform the above-described methods.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied therewith for causing a processor to implement various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a variety of computing/processing devices, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, by utilizing state information of computer-readable program instructions to personalize a custom electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The above description has described embodiments of the present disclosure, and is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A method for arranging a cylindrical array antenna, comprising:
determining array parameters of the cylinder array;
dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays;
and according to a layout strategy, a plurality of array elements are laid out in the subarray, wherein the array elements comprise transmitting array elements and receiving array elements.
2. The layout method of claim 1, wherein the determining the array parameters for the cylinder array comprises:
determining a height and a radius of the cylinder array;
acquiring a horizontal included angle of an area array included in the cylindrical array;
and acquiring channel parameters among the area arrays.
3. The layout method according to claim 2, wherein the dividing the cylinder array according to the array parameters to form a sub-array set including a plurality of sub-arrays comprises:
uniformly dividing the cylindrical surface array into a plurality of sub-arrays according to the height and horizontal included angle in the array parameters, wherein the sub-arrays comprise a plurality of array element grids;
and forming the sub-array set by using the plurality of sub-arrays.
4. The method of claim 1, wherein said laying out a plurality of array elements in said sub-array according to a layout strategy comprises:
uniformly dividing the subarray into a plurality of array element grids for the subarray parameters of the subarray;
and according to a preset strategy, arranging the corresponding array elements into the array element grids.
5. The method according to any one of claims 1-4, further comprising:
optimizing the layout of the cylinder array.
6. A cylindrical array security inspection method is characterized by comprising the following steps:
generating electrical signals of a plurality of frequency bands;
inputting at least one of the electrical signals to a sub-array constructed by the cylindrical array antenna layout method of any one of claims 1 to 5, transmitting electromagnetic waves corresponding to the electrical signals, and receiving echo signals of the electromagnetic waves;
and preprocessing the electromagnetic wave and storing the preprocessed signal.
7. A cylinder array antenna layout apparatus, comprising:
the determining module is used for determining array parameters of the cylinder array;
the dividing module is used for dividing the cylindrical surface array according to the array parameters to form a sub-array set comprising a plurality of sub-arrays;
and the layout module is used for laying out a plurality of array elements in the subarray according to a layout strategy, wherein the array elements comprise transmitting array elements and receiving array elements.
8. A cylinder array security inspection system, comprising:
the signal generating module is used for generating electric signals of a plurality of frequency bands;
a cylindrical array antenna, which is formed by the layout method of the cylindrical array antenna as claimed in any one of claims 1-5;
the switch module is connected between the signal generation module and the cylindrical array antenna and used for sending at least one electric signal to the cylindrical array antenna, generating electromagnetic waves and receiving echo signals of the electromagnetic waves;
and the data storage module is used for preprocessing the electromagnetic waves and storing the preprocessed signals.
9. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to invoke the memory-stored instructions to perform the method of any of claims 1 to 6.
10. A computer readable storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1 to 6.
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| CN115378476A (en) * | 2022-08-22 | 2022-11-22 | 欧必翼太赫兹科技(北京)有限公司 | Method for transmitting and receiving signals by array antenna and array antenna |
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| CN115378476A (en) * | 2022-08-22 | 2022-11-22 | 欧必翼太赫兹科技(北京)有限公司 | Method for transmitting and receiving signals by array antenna and array antenna |
| CN115378476B (en) * | 2022-08-22 | 2023-09-22 | 欧必翼太赫兹科技(北京)有限公司 | Method for transmitting and receiving signals by array antenna and array antenna |
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