KR20180122932A - Apparatus for measuring and imging radar cross section and system having the same - Google Patents

Abstract

The present invention relates to a system for measuring and imaging a radar cross section. The system comprises: a transmission signal source for outputting a signal; a receiver for receiving a signal outputted from the transmission signal source and reflected from a measurement target; a detector for converting power received from the receiver into a voltage; and a computer which attenuates a signal outputted from the transmission signal source so that the receiver is not saturated according to the voltage detected by the detector, and measures a radar cross section for the measurement target according to the output of the signal outputted from the transmission signal source to calculate a radar cross section value for the measurement target and extract a radar cross section image. It is possible to minimize the RCS of the measurement target.

Description

TECHNICAL FIELD [0001] The present invention relates to an electromagnetic wave reflection cross-sectional area measurement apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave reflection cross-sectional area measurement and imaging technique, and more particularly, to an electromagnetic wave reflection cross-sectional area measurement and imaging technique using a W-band millimeter wave signal source illuminated radiometer, Or 3D imaging electromagnetic radiation cross sectional area measurement and imaging apparatus and electromagnetic radiation reflection cross section measurement and imaging system having the same.

Radar Cross Section (RCS) means the cross sectional area of reflection of a radar signal reflected from an aircraft, a ship, or a vehicle. The smaller the RCS area, the smaller the probability of detection from the radar. Therefore, in order to prevent detection by the radar, the shape of the structure must be designed so that the RCS is small. Especially, the technique having such a stealth function is used as a very important technology in the military.

In general, the RCS measurement is performed by using a real-time size or a reduced scale model of an electromagnetic wave anti-reflection chamber by using a meter such as a radar or a vector network analyzer (VNA). When the object is rotated 360 degrees, The RCS reflection area is expressed in dBsm for the intensity of the signal. However, these conventional methods require large measuring facilities and expensive measuring equipment, and there is a problem that a lot of measurement time and costs are incurred.

An object of the present invention is to measure RCS of a reduced measurement object by using a signal reflected from a reduced measurement object outputted from a transmission signal source in a small space and to measure the RCS of the measurement object based on the RCS measurement value and the 3D image And to provide a method and an apparatus for imaging and measuring an electromagnetic wave reflection cross-sectional area and a system including the same.

It is another object of the present invention to provide an electromagnetic wave reflection cross-sectional area measurement and imaging device for measuring RCS of a reduced measurement object using a signal source illuminated millimeter-wave radiometer and a system equipped with the same have.

According to a first aspect of the present invention, there is provided a liquid crystal display comprising: a lens antenna which outputs a signal from a transmission signal source and collects and reflects a signal reflected from the measurement object; A reflection plate that reflects a signal from the lens antenna; A receiving antenna and a receiver for collecting signals reflected from the reflection plate; A detector and a DC amplifier for detecting a reception signal amplified by the receiver; A video camera for capturing an image of the measurement object; And a receiver driver for enabling a scanning operation to receive reflected waves while the receiver is moving in an XY plane, wherein the information of the receiver and the video camera is provided to a computer for electromagnetic wave reflection cross- And an electromagnetic wave reflection cross-sectional area measurement and imaging device.

According to an embodiment of the present invention, the scanner includes a base, and the lens antenna is disposed on an upper portion of the base, and the lens antenna includes a lens supporting the base to adjust the height of the base, Antenna supports.

According to an embodiment of the present invention, the lens antenna support includes a mount installed on the slide installed on the base so as to be movable in the front-rear direction; Guide rods extending in the height direction on both sides of the cradle; An upper and a lower supporter supported at both ends of the guide rod and supporting upper and lower portions of the lens antenna; And a fixing table for supporting the upper end of the guide rod.

According to an embodiment of the present invention, the video camera is installed in the upper support.

According to an embodiment of the present invention, the reflector includes a reflector support which is installed on a base behind the lens antenna and supports the reflector so as to adjust the height and the angle of the reflector.

According to the embodiment of the present invention, the receiver driving unit of the scanner includes a step motor that supports the receiver at the top and drives it in the X-Y direction.

According to an embodiment of the present invention, the apparatus further includes a Z-axis direction transfer unit for moving the receiver in the Z direction.

According to the embodiment of the present invention, the scanner includes a base, and a receiver driver installed on the base and feeding the receiver in XY directions while supporting the receiver on the top, A lens antenna support for supporting the lens antenna to adjust the height of the base and the distance to the object to be measured, and a reflector support for supporting the reflector to adjust the height and angle of the reflector to the rear side of the lens antenna support And a carrier for moving and leveling the base is provided on a lower surface of the base.

According to an embodiment of the present invention, the reception antenna includes a horizontal polarization antenna and a vertical polarization antenna, or includes a circular polarization antenna.

According to a second aspect of the present invention, there is provided an apparatus for measuring a cross-sectional area of an electromagnetic wave, comprising: a transmission signal source for outputting a signal; And a supporting device mounted on the front side of the electromagnetic wave cross-sectional area measuring and imaging device, the supporting device including a supporting base on which an object to be measured is supported on the upper side and a rotary plate for rotating the supporting base to adjust the angle of the object to be measured. Measurement and imaging systems.

A method for measuring and imaging an electromagnetic wave reflection cross-sectional area, comprising: (a) measuring a first electromagnetic wave reflection cross-sectional area of a measurement object by outputting a signal from a transmission signal source; (b) attenuating an output of the signal output from the transmission signal source so that the receiver is not saturated when the receiver receives a signal reflected from the measurement object, the voltage of the signal being received; (c) measuring a second electromagnetic wave reflection cross-sectional area of the measurement object by outputting an attenuated signal from the transmission signal source; And (d) calculating a final electromagnetic wave reflection cross-sectional area value for the measurement object based on the first and second electromagnetic wave reflection cross-sectional areas.

Preferably, the signal output from the transmission signal source includes at least one of a W-band millimeter wave (CW) signal, a frequency modulated continuous wave (FMCW) signal, a linear frequency modulation (LFM) A pulse signal, a pulse modulation signal, or a noise signal.

Preferably, after step (c), when the receiver receives the attenuated signal reflected from the measurement object, it checks the voltage of the attenuated signal to prevent the receiver from becoming saturated, And re-attenuating the output of the signal output from the output terminal; And outputting the re-attenuated signal to measure a third electromagnetic wave reflection cross-sectional area of the measurement object.

Preferably, the step (d) may include calculating a final electromagnetic wave reflection cross-sectional area value for the measurement object based on the first to third electromagnetic wave reflection cross-sectional areas.

Advantageously, the dynamic range of the receiver can be increased to more than 30 dB through attenuation and re-attenuation of the signal.

Preferably, the step (d) includes the steps of: converting measurement data of the first and second electromagnetic wave reflection cross-sectional areas into converted data and extracting conversion coefficients; Converting the converted data into decibel data, and calculating a log conversion coefficient based on the converted coefficient.

Preferably, in the step (d), the system correction coefficient related to the system loss is reflected on the electromagnetic reflection cross-sectional area value obtained by synthesizing the first and second electromagnetic wave reflection cross-sectional areas based on the log conversion coefficient, And a step of calculating the number of steps.

 Preferably, the electromagnetic wave reflection cross-sectional area may be measured based on a specific vertical polarization or a horizontal polarization measured with respect to the measurement object.

Preferably, the measurement object, the transmission signal source, the receiver arrangement, and the reception power are adjusted in advance based on the electromagnetic wave reflection cross-sectional area measured for the standard measurement object, and the standard measurement object is a rectangular plate, .

According to a second aspect of the present invention, there is provided a method of measuring and imaging an electromagnetic wave reflection cross-sectional area, comprising the steps of: (a) measuring an image of a first electromagnetic wave reflection sectional area with respect to a measurement object by outputting a signal from a transmission signal source; (b) attenuating an output of a signal output from the transmission signal source so that the receiver is not saturated when the receiver receives a signal reflected from the measurement object, the voltage of the signal being received; (c) measuring an image of a second electromagnetic wave reflection cross-sectional area with respect to the measurement object by outputting an attenuated signal from the transmission signal source; And (d) extracting an image of the measurement object based on the images of the first and second electromagnetic wave reflection cross-sectional areas.

Preferably, the step of measuring an image of an electromagnetic wave reflection cross-sectional area reflected from the background of the measurement object without outputting the signal, wherein an electromagnetic wave absorber for shielding reflected waves is installed in the background of the measurement object; And extracting a background image for the measurement object based on the background electromagnetic wave reflection cross-sectional area.

Preferably, the method further comprises extracting and correcting a difference image between the extracted image based on the image of the first and second electromagnetic wave reflection cross-sectional areas and the background image, and then extracting a final image of the measurement object .

According to a third aspect of the present invention, there is provided an electromagnetic wave reflection cross-sectional area measurement and imaging system comprising: a transmission signal source for outputting a signal; An antenna and a receiver output from the transmission signal source and receiving a signal reflected from the measurement object; A detector for converting a signal received from the receiver into a voltage; And an attenuator for attenuating a signal output from the transmission signal source so that the receiver is not saturated according to a voltage detected through the detector, and for outputting an electromagnetic wave reflection cross-sectional area And calculating a value of an electromagnetic wave reflection cross-sectional area for the measurement object and extracting an electromagnetic wave reflection cross-sectional area image.

As described above, according to the present invention, it is possible to visually check the shape and position of the electromagnetic wave reflection cross-sectional area distribution using the RCS polarization image data of the measurement object, and to apply it to the RCS optimization of the measurement target structure. Unlike devices, it does not require the use of large-sized electromagnetic reflex gauges and expensive measuring equipment, the device is small and simple, and has a very low cost advantage compared with existing measuring equipment. In addition, there is an advantage that an interference (multi-path) generated in the structural form of the measurement object can be shown as an image, and there is an effect that it can be applied to a structural shape optimization that reduces the RCS by minimizing the interference .

In other words, all the forces of modernity depend on whether the radar is detected or not, and stealth technology that minimizes the detection of aircraft, ship, and vehicle from radar is a cutting-edge technology that becomes the core technology of modern defense. Therefore, a military aircraft, a ship, a vehicle, and the like should be designed to have a structure of a smallest reflection cross-sectional area so that reflected radar cross section (RCS) is not detected by a radar. And can be used as a device for designing and manufacturing a shape having a shape of a circle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an electromagnetic wave reflection cross-sectional area measurement and imaging system according to a preferred embodiment of the present invention. FIG.
2A is a perspective view of an electromagnetic wave reflection cross-sectional area measurement and imaging system according to an embodiment.
FIG. 2B is a view of a support apparatus in accordance with one embodiment.
2C is a perspective view of an electromagnetic wave cross-sectional area measurement and imaging system according to one embodiment.
3 is a block diagram of a receiver with a polarization according to one embodiment.
4 is a block diagram of a computer of an electromagnetic wave reflection cross-sectional area measurement and imaging apparatus according to an embodiment.
5 is a flowchart of a method of measuring and imaging an electromagnetic wave reflection cross-sectional area according to an embodiment.
6 is an exemplary view of a standard measurement object.
FIG. 7 is a diagram illustrating an arrangement between a measurement object, a transmission signal source, and antennas of a receiver in an RCS measurement according to an embodiment.
8 is an exemplary diagram showing the measured values of the electromagnetic wave reflection cross-sectional area obtained in accordance with the attenuation of the signal output from the transmission signal source.
9 is an exemplary diagram showing converted data.
10 is an exemplary view showing the measured value of the final electromagnetic wave reflection cross-sectional area.
11 is a flowchart of a method of measuring and imaging an electromagnetic wave reflection cross-sectional area according to another embodiment.
FIG. 12 is a diagram illustrating an arrangement of an object to be measured, a transmission signal source, and an antenna of a receiver in an image measurement according to an exemplary embodiment.
13 is a flowchart of a method of correcting the background electromagnetic wave reflection cross-sectional area.
FIG. 14 is an exemplary diagram showing before and after correction of a background image according to background electromagnetic wave reflection cross-sectional area.
FIG. 15 is a diagram illustrating simulation of a spherical, cylindrical, and rectangular standard measurement object according to an embodiment of the present invention and comparison of electromagnetic wave reflection cross-sectional areas measured by the present apparatus.
16 is a diagram illustrating frequency-dependent simulation and measured electromagnetic wave reflection cross-sectional area for spherical, cylindrical, and rectangular standard measurement objects according to another embodiment of the present invention.
Figure 17 is an illustration of an imaged electromagnetic wave reflection cross-sectional area of a miniaturized model aircraft in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will be more apparent from the following detailed description taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. "And / or" include each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

Also, in each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, Unless the order is described, it may happen differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an electromagnetic wave reflection cross-sectional area measurement and imaging system according to a preferred embodiment of the present invention. FIG.

Referring to FIG. 1, an electromagnetic wave reflection cross-sectional area measurement and imaging device includes a transmission signal source 110, an electromagnetic wave reflection cross-sectional area measurement and imaging device 120, and a support device 130.

The transmission signal source 110 is a device for outputting a signal for measuring the electromagnetic wave reflection cross-sectional area of a measurement object whose size is reduced. The transmission signal source 110 may be a narrow band signal source of a continuous wave (CW), a wideband signal source, a noise, a frequency modulation (FM), a frequency modulation continuous (FMCW) Frequency Modulated Continuous Wave, Linear Frequency Modulation (LFM), Pulse, Pulse Modulation, or a similar modulated wideband signal source, and may include, for example, The signal output from the signal source 110 may be a W-band millimeter wave noise or a continuous signal. The transmit signal source 110 may also be comprised of the aforementioned W-band signal source or termination, an isolator, an amplifier, a bandwidth filter, a variable attenuator, a circularly polarized wave transducer, and a circularly polarized antenna , A signal source of a frequency other than the W-band may be used.

An electromagnetic wave reflection cross-sectional area measurement and imaging device 120 is an apparatus for outputting a signal from a transmission signal source 110 and receiving a signal reflected from a measurement object to perform measurement and imaging of the electromagnetic wave reflection cross-sectional area. For example, May be a noise illuminated radiometer.

Preferably, the electromagnetic cross-sectional area measurement and imaging device 120 is a Bi-static method for moving and scanning the position of the receiver 121 after fixing the position of the measurement object, or a Bi-static method for scanning the transmission signal source 110 and the receiver 121 A mono-static method of scanning the transmission signal source 110 and the receiver 121 at the same time, and measuring the electromagnetic wave reflection cross-sectional area of the measurement object having a reduced size can be measured and imaged.

The electromagnetic radiation cross-sectional area measurement and imaging device 120 includes a receiver 121, a detector 122, a video camera 123, a computer 124 and a scanner 125. It also includes a power supply 126.

The receiver 121 is an apparatus for receiving a signal reflected from a measurement object and may be constituted by a waveguide-microstrip transducer, an amplifier, a bandwidth filter, and a square law detector.

The receiver 121 is driven by the scanner 125 and the measured data received from the receiver 121 is provided to the computer 124.

The detector 122 is a square detector of the receiver 121 which converts the received power collected in the radiometer into a voltage signal and amplifies the output voltage so that the difference between the minimum and maximum output voltages of the detector 122 is 10 V or The output of the detector 122 is adjusted such that the voltage corresponds to the ADC (Analog to Digital Converter) input voltage range. Here, the difference between the minimum and maximum output voltages is 5V, 6V, or 20V for the signal resolution. Preferably, the output circuit of the detector 122 may be comprised of a low noise instrument amplifier, a video offset amplifier, and a buffer amplifier.

The video camera 123 may be a monochrome or color video camera, and the video camera image may be output through the computer 124 as an auxiliary device for providing an image of the measurement object for RCS measurement recording. That is, the video camera is for recording the measurement object and may not be used for the RCS measurement.

The computer 124 controls the scanner 125 and receives information from the receiver 121, the detector 122 and the video camera 123 to measure the electromagnetic wave reflection cross-sectional area and images the data reception and electromagnetic reflection cross- .

 FIG. 2A is a view showing an overall configuration of an electromagnetic wave reflection cross-sectional area measurement and imaging system according to an embodiment of the present invention, and FIG. 2B is a view illustrating a support apparatus according to an embodiment of the present invention. According to an embodiment of the present invention shown in FIG. 2A, a Bi-static method is performed in which a position of a measurement object is fixed and then scanned to a receiver.

2A, the electromagnetic cross-sectional area measurement and imaging device 120 includes a lens antenna 310, a lens antenna support 3100, a reflector 320, a reflector support 3200, a receiver 121, a detector 122, A video camera 123, a computer 124, and a scanner 125.

The scanner 125 includes a base 1250 and a receiver driver 1256.

The base 1250 is composed of a flat plate and is supported by a carrier 1252. The carrier 1252 includes a plurality of legs 1253 and wheels 1254. The scanner 125 is movable by the carrier 1252 and is configured to be capable of vertical and horizontal alignment through height adjustment of the wheels 1254 or length adjustment of each leg 1253. [

The base 1250 is provided with a three-axis position sensor 1251 for horizontal and vertical alignment adjustment.

The receiver driver 1256 supports the receiver 121 and is driven to move in the X-Y direction. In the embodiment shown in FIG. 2A, the receiver driver 1256 includes a biaxial linear stepper motor capable of precisely moving the receiver 121 in the X-Y direction. Therefore, the receiver 121 moves along the X-direction and Y-direction guides formed on the upper portion of the base 1250, and can receive electromagnetic waves with respect to reflected electromagnetic waves of a vertical polarization and a horizontal polarization for each specific polarization. And includes a variable Z-axis so that the receiver 121 can be adjusted in the Z-axis direction.

The receiver 121 can perform an automatic continuous scanning operation for receiving reflected waves while continuously moving in the X-Y plane by the receiver driver 1256, and a discontinuous scanning operation for receiving reflected waves after moving to specific positions in the X-Y plane.

According to an embodiment of the present invention, the Z direction adjustment is manually performed using the variable Z axis, and the movement adjustment on the XY plane is automatically adjusted by the biaxial linear step motor constituting the receiver driver 1256. However, For example, the receiver 121 may be configured to be automatically controlled to move in the X, Y, and Z directions by the receiver driver 1256. To this end, the receiver driver 1256 may further include a stepping motor capable of moving the receiver 121 in the Z-axis direction.

In this way, the receiver driver 1256 according to the present invention is configured to be able to perform a scanning operation to receive reflected waves while automatically adjusting the position of the receiver 121 in the XY plane in three dimensions of XYZ, Direction can be formed by an automatic regulating device such as a manual regulating device step motor such as a variable Z-axis.

The base 1250 is provided with a lens antenna supporting portion 3100 and a reflecting plate supporting portion 3200.

The lens antenna support portion 3100 is installed forward at the base 1250 to support the lens antenna 310. [ The lens antenna support portion 3100 is configured to adjust the position of the lens antenna 310 in the forward and backward directions and the height direction.

The lens antenna support portion 3100 is supported at both ends thereof by a mount stand 3102 and a guide rod 3104 and guide rods 3104 extending in the vertical direction from both sides of the mount stand 3102, Upper and lower supports 3106 and 3107 for supporting upper and lower portions of the guide rod 3104 and a fixing base 3108 for fixing the upper ends of the guide rods 3104.

Since the upper and lower supports 3106 and 3107 are movably fixed along the guide rod 3104 in the vertical direction, the height of the lens antenna 310 can be adjusted.

The holder 3102 is supported by the slide 3120 provided on the base 1250 and is configured to be positionally adjustable in the X-axis direction, that is, the front-rear direction, from the upper surface of the base 1250.

The base 1250 is provided with a handle 3122 for manually adjusting the forward and backward movement of the mount 3120 supported by the slide 3120 to enable the manual movement of the lens antenna mount 3100 in the anteroposterior direction . The handle 3122 is provided with a locking portion so that the lens antenna support 3100 and the lens antenna 310 supported thereby can be fixed in the adjusted position. The distance between the lens antenna 310 and the object to be measured can be adjusted through the movement of the lens antenna support 3100 in the anteroposterior direction.

The video camera 123 may be installed on the upper support 3107 of the lens antenna support 3100. Therefore, the position of the video camera 123 and the measurement object can be adjusted together with the distance between the lens antenna 310 and the measurement object.

The lens antenna 310 collects and passes the reflected signal from the measurement object. The lens antenna 310 may be a W-band lens antenna.

The reflector support portion 3200 is installed on the rear side of the lens antenna support 3100, that is, on the opposite side of the measurement object with respect to the lens antenna 310. [ The reflector support portion 3200 may be formed as a support rod. The reflector support portion 3200 may be vertically installed on the base 1250 and the reflector plate 3200 may be installed on the reflector support portion 3200 so as to be adjustable in angle and height through a reflector support portion 3200 . It can also be detachably installed.

The reflector 320 is disposed on the reflector support portion 3200 and aligned through angle and height adjustment. A signal transmitted through the lens antenna 310 is reflected toward the receiver 121 by the reflector 320.

The receiver 121 is driven by the scanner 125, more specifically the receiver driver 1256, and receives the signal reflected by the reflector 320. [ The receiver 121 is provided with a reception antenna 330 so as to receive a signal reflected by the reflection plate 320.

The receive antenna 330 includes a horizontally polarized antenna and a modified polarized antenna, or a circularly polarized antenna.

In one embodiment, as shown in FIG. 3A, the receiving antenna 330 of the receiver 121 may be composed of a horizontal polarized wave antenna 331 and a vertically polarized wave antenna 332. In this case, the horizontal and vertical polarization characteristics of the measurement object can be measured simultaneously. In this case, the receiver 121 and the detector 122 may be formed corresponding to the horizontal polarization antenna 331 and the vertical polarization antenna 332, respectively. 3 (b), the receiving antenna of the receiver 121 may be constituted by a circularly polarized antenna 333. In this case, in order to measure the polarization characteristics of the measurement object, the receiver 121 is divided into horizontal and vertical polarizations, and the electromagnetic reflection cross-sectional area of the measurement object with respect to the vertical and horizontal polarizations can be measured.

The receiver 121 is driven by the receiver 125 in more detail than the scatterer 125 and the measured data received from the receiver 121 is provided to the computer 124.

According to one embodiment of the present invention, the detector 122 may be located adjacent to the receiver 121, and the computer 124 may be installed on the base 1250.

2A, since the lens antenna supporting portion 3100 and the reflecting plate supporting portion 3200 are installed on the base 1250 of the scanner 125, the scanner 125 is mounted on the lens antenna 310 And the reflection plate 320, as shown in Fig.

2A, the measurement object is supported by the support device 130, and the transmission signal source 110 is installed on both sides of the measurement device for the cross-sectional area of the electromagnetic wave and the imaging device 120 to measure the electromagnetic wave reflection cross- And outputs a signal to be used. The electromagnetic cross-sectional area measurement and imaging device 120 may receive a signal reflected by the measurement object to perform measurement and imaging of the electromagnetic wave reflection cross-sectional area.

2A and 2B, the support device 130 is a structure for supporting a measurement object. The support device 130 includes a support base 131 on which the measurement object is placed, a rotation plate (not shown) for adjusting the angle of the measurement object by rotating the support base 131 132 < / RTI >

Here, the support table 131 may be made of a low-loss material having a dielectric constant of about 1 as an RF support having little reflection, and can be accurately and precisely rotated through the rotation plate 132 so that the rotation angle of the measurement object can be rotated 360 degrees The angle can be adjusted by about 1 degree.

The support 131 may have a three-axis position sensor 134 for horizontal and vertical alignment.

In addition, a wall of the absorber 133 may be installed around the support stand 130. The absorber 133 absorbs electromagnetic waves from the surrounding environment (for example, walls, ceilings, floors, and other peripheral facilities in the space where the system is implemented), and minimizes electromagnetic interference according to the surrounding environment. Preferably, the absorber 133 may correspond to an RF absorber with minimal reflection at the frequency of the signal used. That is, the measurement object can be mounted on the RF absorber 133 which has little reflection, the RF support 131 and the rotation plate 132 that rotates the RF support, and the electromagnetic wave reflection cross-sectional area can be measured and imaged.

FIG. 2C is a perspective view showing a modified example of an electromagnetic wave reflection cross-sectional area measurement and imaging system according to an embodiment of the present invention. FIG.

Referring to FIG. 2C, in contrast to the embodiment shown in FIG. 2A, the electromagnetic wave reflection cross-sectional area measurement and imaging system according to an exemplary embodiment of the present invention includes a transmission signal source 110 and a support device 130, And the imaging device 120, as shown in FIG.

Referring to FIG. 2C, the transmission signal source 110 is fixed to a support plate 1110 formed to be capable of being stretched and rotated, and the support plate 1110 is supported to be adjustable in height by an elevating member 1120. The support plate 1110 includes a first support plate 1112 and a second support plate 1116 and a rotation coupling member 1114. [

The first support plate 1112 has a transmission signal source 110 fixed on one upper surface thereof. The transmission signal source 110 is rotatably coupled to the first support plate 1112 so as to be capable of alignment and angle adjustment with respect to the measurement object supported by the support device 130.

The second support plate 1116 is coupled to the first support plate 1112 by the rotation coupling member 114 in a state where the second support plate 1116 overlaps with the first support plate 1112 to one side. The first support plate 1112 is slidably formed along the second support plate 1116 to be adjustable in length. For this, a guide slot may be formed in the second support plate 1116. The other side of the second support plate 1116 can be coupled to one side of the electromagnetic wave reflection cross section measurement and imaging device 120, e.g., the base 1250, by the elevating member 1120.

The rotary coupling member 1114 may be formed to have a guide coupled to a guide slot of the second support plate 1116 and a rotation part formed to be rotatable with respect to the guide and fixed to the other side of the first support plate. The length of overlapping of the first and second support plates 1112 and 1116 is changed as the rotation coupling member 1114 moves along with the first support plate 1112 along the guide slot, The length can be adjusted.

Further, the first support plate 1112 rotates about the second support plate 1116 via the rotation coupling member 1114, thereby making it possible to break the predetermined angle.

The embodiment described with reference to FIG. 2C is configured such that length adjustment and bending are both possible through the rotary coupling member 1114. However, the first and second support plates 1112 and 1114 can be retractably engaged, It is also possible for the support plate 1116 to be rotatably coupled to the base 1250.

As described above, the support plate 1110 according to the embodiment of the present invention includes the stretching portion and the rotating portion, and is formed to be able to be stretched and adjusted in angle.

The support plate 1110 is supported so as to be adjustable in height by a plurality of elevating members 1120. As the elevating member 1120, an elevating rod that can be adjusted in height while being expanded and contracted in the height direction can be used. The lifting and lowering rod is mounted on the first and second support plates 1112 and 1116 so as to secure stability during the extension and rotation of the support plate 1110. The other end of the second support plate 1116 is connected to the base 1250, Are coupled through a rope.

The elevating member 1120 has a wheel at its lower end, and has ease of movement when the support plate 1110 is stretched and adjusted in angle.

According to the embodiment of the present invention, the support device 130 can be combined with the electromagnetic wave reflection cross-sectional area measurement and the imaging device 120 through the connection plate 1301 so as to be capable of being retracted and rotated.

A connection plate 1301 for fixing the support device 130 to the electromagnetic wave reflection cross-sectional area measurement and imaging device is formed similarly to the connection plate 1110 that connects the transmission signal source 110 to the electromagnetic wave reflection cross-sectional area measurement and imaging device.

That is, the connection plate 1301 includes the first connection plate 1302, the second connection plate 1306, and the rotation coupling member 1304, and is the same as the configuration of the receiving plate 1301.

The first connection plate 1302 is coupled to the rotation plate 132 of the support unit 130 on one side. The rotation plate 132 is coupled to the first connection plate 1302 so as to be adjustable in angle through rotation.

The second connection plate 1306 is coupled to the first connection plate 1302 through the rotation coupling member 1304 in a state where the second connection plate 1306 overlaps with the first connection plate 1302, And is slidable along the connecting plate 1306 so that the first connecting plate 1302 can be foldably engaged with the second connecting plate 1306.

The wheels are attached to the lower side of the rotation plate 132 and the rotation coupling member 1304 to facilitate movement to the bottom surface.

According to the embodiment shown in FIG. 2C, the transmission signal source 110, which has been separated from the electromagnetic wave reflection cross-sectional area measurement and imaging device 120, and the support device 130 for supporting the measurement object, 120 so that height, distance, angle and leveling can be made easier.

4 is a block diagram of a computer of an electromagnetic wave reflection cross-sectional area measurement and imaging apparatus according to an embodiment.

4, the computer 124 includes a data acquisition unit 410, a data processing unit 420, a scanner control unit 430, and a control unit 440. Preferably, the data processing unit 420 performs RCS measurement A module 421, and an RCS imaging module 422.

The data acquisition unit 410 receives the data acquired from the receiver 121, the detector 122 and the video camera 123 and the data processing unit 420 receives the data obtained from the data acquisition unit 410 The electromagnetic wave reflection cross-sectional area of the measurement object is measured or imaged. The specific operations performed by the RCS measurement module 421 and the RCS imaging module 422 of the data acquisition unit 410 will be described below with reference to FIGS. 5 and 11. FIG.

The scanner control unit 430 controls a moving section or a moving speed of the scanner 125. According to an embodiment of the present invention, the scanner 125 may be referred to as a 2D scanner 125 because it receives the reflected wave while automatically moving the receiver 121 in the X-Y plane by the receiver driver 1256.

The control unit 440 controls operations of the data acquisition unit 410, the data processing unit 420, and the scanner control unit 430 and the data flow.

5 is a flowchart illustrating a method of measuring an electromagnetic wave reflection cross-sectional area according to an embodiment.

First, in order to measure the electromagnetic wave reflection cross-sectional area of the measurement object, the electromagnetic wave reflection cross-sectional area measurement and imaging device 120 may be adjusted to the RCS measurement mode.

Prior to step S510, the arrangement of the measurement object, the transmission signal source 110, and the receiver 121, and the reception power of the receiver 121 may be pre-adjusted based on the measured values of the electromagnetic wave reflection cross- . Here, the standard measurement object is an object having the electromagnetic wave reflection cross-sectional area measurement value simulated based on the theory, the electromagnetic wave reflection cross-sectional area measurement according to the present invention and the electromagnetic wave reflection cross-sectional area value measured using the imaging system, (C), a rectangular plate, a cylinder, and a sphere having two or more sizes, respectively. That is, if the value of the electromagnetic wave reflection cross-sectional area of the standard measurement object measured using the electromagnetic wave reflection cross-sectional area measurement and imaging system according to the present invention is accurate, the measurement accuracy of the other measurement object is also accurate, The arrangement of the object, the transmission signal source 110, and the receiver 121, and the received power.

More specifically, the electromagnetic wave reflection cross-sectional area for each of the vertical and horizontal polarized waves is measured for each of the rectangular plates, cylinders, and spheres, which are standard measurement objects, and the simulated electromagnetic wave reflection cross-sectional area measurement values are compared The transmission signal source 110, and the receiver 121, and the received power are adjusted so that the accuracy is confirmed and the accuracy of the predetermined standard is obtained, , The operation of confirming the accuracy again may be repeated.

The arrangement of the measurement object, the transmission signal source 110 and the lens antenna 310 of the receiver 121 can be adjusted as shown in Fig. 7, and the transmission signal source 110, the measurement object, The angle between the antennas 310 may be arbitrarily set according to the angle of the RCS measurement range. Here, the lens antenna 310 and the measurement object may be disposed close to each other so that a focus is not formed, so that a plane wave that is not focused on the measurement object may be directed to the measurement object. In addition, the line of sight of the measurement object and the lens antenna 310 can be aligned so that the output voltage of the detector 122 becomes a maximum value.

The RCS measurement module 421 of the data processing unit 420 determines whether the measurement object, the transmission signal source 110 and the lens antenna 310 of the receiver 121 are arranged and received by using the standard measurement object, A signal is output from the signal source 110 to measure a first electromagnetic wave reflection cross-sectional area of the measurement object (step S510). Preferably, the electromagnetic wave reflection cross-sectional area can be measured simultaneously for each of the vertical and horizontal polarizations with respect to the measurement object.

When the receiver 121 receives a signal reflected from the measurement object, the detector 122 converts the power of the received signal into a voltage, and the RCS measurement module 421 controls the RCS measurement module 421 so that the output value of the receiver 121 is not saturated , And attenuates the output of the signal output from the transmission signal source 110 (step S520). The RCS measurement module 421 measures a second electromagnetic wave reflection cross-sectional area of the measurement object by outputting an attenuated signal from the transmission signal source 110 (step S530), and measures the cross- (Step S540). Here, the receiver 121 moves left and right by the scanner 125 to measure the object to be measured, which is determined according to the angle range, that is, the angle between the transmission signal source 110 and the object to be measured and the distance to the lens antenna 310 The RCS measurement is made possible in the viewing angle range.

More specifically, the RCS measurement module 421 can convert the measurement data of the first and second electromagnetic wave reflection cross-sectional areas into the conversion data using the following [Expression 1], and extract the conversion coefficient. For example, when the electromagnetic wave reflection cross-sectional area due to attenuation of an output signal is measured as shown in FIG. 8, the converted data can be obtained as shown in FIG.

[Equation 1]

Here, S is the scaling factor, X1 is the measurement data using the original signal, X2 is the measurement data using the first attenuated signal, X3 is the measurement data using the second attenuated signal, X8 is the measurement data using the seventh order attenuated signal. For example, when defining the point at which the beam width of the receive antenna is -3dB as a reference point, the attenuation of the output signal can be adjusted in units of -3dB, X1 is 0dB attenuated measurement data, X2 is 3dB attenuated measurement Data, and X8 may correspond to 21dB attenuated measurement data.

In addition, the attenuation of the output signal may be adjusted such that the dynamic range of the receiver 121 may be of a certain magnitude. For example, if the dynamic range of the receiver 121 itself is about 10 dB, to extend the dynamic range to 30 dB, since the margin is 3dBX7 = 21 dB, a total dynamic range of 31 dB can be measured, Can be adjusted to attenuate.

Next, the RCS measurement module 421 converts the converted data into decibel (dB) data by using (1) of the following [Expression 2], and by using (2) to The log conversion coefficient can be calculated based on the conversion coefficient. [Equation 2] is a case where the signal is attenuated by 3 dB, and [Equation 2] can be modified depending on the degree of attenuation.

[Equation 2]

10

log (X1) = P1 -------------------- (1)LS

10

log (X1) = P1 (1)

10

log (X2) = P1 - 3 dB ---------------- (2)LS

10

log (X2) = P1 - 3 dB - (2)

10

log (X1

)Left side = LS

10

log (X1

)

10

log(S) = P1 - 3 dB ------------(3)= P1 - LS

10

log (S) = P1 - 3 dB - (3)

3 dB = LS

10

log(S) --------------------- (4)

3 dB = LS

10

log (S) --------------------- (4)

S = 1.854 -------------------------------------- (5)

Log-scaling factor LS = 1.118945 --------------- (6)

RCS value measured in RCS measurement mode:

Final RCS value = P1 + SCF ---------------------- (7)

RCS value measured in RCS imaging mode:

Final RCS value = SUM (P1 + ... + P _{total_piexel} ) + ISCF --- (8)

Where LS is the log-scaling factor, SCF is the system correction factor, and P1 is the RCS value before the SCF is calibrated. The system correction factor SCF and the scaling factor S can be adjusted depending on the system.

Next, the RCS measurement module 421 calculates system loss (loss) on the electromagnetic wave reflection cross-sectional area value obtained by combining the first and second electromagnetic wave reflection cross-sectional areas based on the log conversion coefficient, using (7) And the final electromagnetic wave reflection cross-sectional area value can be calculated. That is, the RCS extracting module 421 combines the measured data for each attenuation section to extract the measured values of the electromagnetic wave reflection cross-sectional area of the section having the received signal intensity fluctuation of 30 dB or more. Finally, And a system correction factor (SCF), which is a system correction coefficient including a reception antenna and a WG transition, to calculate a final electromagnetic wave reflection cross-sectional area value. Here, the SCF is calculated as the difference between the P1 in (1) of [Expression 2] and the simulation RCS value of the measurement object. For example, the final electromagnetic wave reflection cross-sectional area value can be obtained as shown in FIG.

In one embodiment, after step S530, when the receiver 121 receives the attenuated signal reflected from the measurement object, the RCS measurement module 421 identifies the voltage of the attenuated signal that is received, The output of the signal output from the transmission signal source 110 can be re-attenuated so as not to become saturated. Here, the dynamic range (DR) of the receiver 121 through the attenuation and re-attenuation of the signal can be expanded to 30 dB, and the output of the attenuated or re-attenuated transmission signal source is 30 dB or more. That is, the dynamic range of a typical radiometer is about 10 dB, but according to the present invention, the dynamic range can be extended to 30 dB by attenuating and re-attenuating the signal for measurement of the electromagnetic wave reflection cross-sectional area. The RCS measurement module 421 may then output a re-attenuated signal to measure a third electromagnetic wave reflection cross-sectional area of the measurement object. In this case, in step S540, the final electromagnetic wave reflection cross-sectional area value for the measurement object can be calculated based on the first to third electromagnetic wave reflection cross-sectional areas. That is, the attenuation of the signal output from the transmission signal source 110 can be repeated one or more times depending on the performance of the detector 122, and the final electromagnetic wave reflection cross-sectional area value is determined by the electromagnetic wave reflection cross- .

11 is a flowchart of a method of measuring and imaging the electromagnetic wave reflection cross-sectional area according to another embodiment.

First, in order to image the electromagnetic reflection cross-sectional area of the measurement object, the electromagnetic reflection cross-sectional area measurement and imaging device 120 may be adjusted to the RCS imaging mode.

Before step S1110, the arrangement of the measurement object, the transmission signal source 110, and the receiver 121, and the received power may be adjusted in advance based on the measured electromagnetic wave reflection cross-sectional area for the standard measurement object. Preferably, the arrangement of the measurement object, the transmission signal source 110, and the receiver 121, and the manner in which the received power is adjusted using the standard measurement object may be the same as described with reference to FIG. 5, The arrangement of the object, the transmission signal source 110, and the lens antenna 310 of the receiver 121 can be adjusted as shown in FIG. 12, and the electromagnetic waves output from the transmission signal source 110 are transmitted to the measurement object Can be focused. More specifically, referring to Figure 12, the focal distance F between the measurement object, the lens antenna 310, and the reflection plate 320 _{(1 / S 1) + (} 1 + S 2) = satisfy (1 / F) .

After the arrangement of the measurement object, the transmission signal source 110 and the receiver 121, and the reception power are adjusted, the RCS imaging module 422 outputs a signal from the transmission signal source 110 to generate a first And the image of the electromagnetic wave reflection cross-sectional area is measured (step S1110).

When the receiver 121 receives a signal reflected from the measurement object, the RCS imaging module 422 outputs the signal from the transmission signal source 110 so that the receiver 121 does not saturate, (Step S1120), and outputs an attenuated signal from the transmission signal source to measure an image of the second electromagnetic wave reflection cross-sectional area with respect to the measurement object (step S1130). The description of steps S510 to S530 described with reference to Fig. 5 may be applied to steps S1110 to S1130. In the RCS imaging module 422, since the distance between the object to be measured and the lens antenna 310 is long, the center width of the lens antenna 310 (that is, the beam width of 1 to 2 degrees ) Is measured and imaged.

An image of the measurement object is extracted based on the images of the first and second electromagnetic wave reflection cross-sectional areas (step S1140). Preferably, in addition to steps S1110 to S1130, the image of the background electromagnetic wave reflection cross-sectional area of the measurement object is measured without outputting a signal from the transmission signal source 110, and the background image of the measurement object based on the image of the background electromagnetic wave reflection cross- May be further performed. This is for correcting the influence of the reflected wave from the absorber provided around the measurement object in order to shield the reflected wave from the periphery of the measurement object. The RCS imaging module 422 extracts the difference image between the extracted image and the background image based on the first and second electromagnetic wave reflection cross-sectional areas, and then extracts the final image of the measurement object. That is, the background image is extracted and corrected in order to reduce the interference and reflection signals from the surrounding environment or the obstacle and improve the measurement accuracy.

In step S1140, the measurement data for the first and second electromagnetic wave reflection cross-sectional areas are converted into conversion data, the conversion coefficient is extracted, the conversion data is converted into decibel (dB) data, and the log conversion coefficient And calculating a final electromagnetic wave reflection cross-sectional area value by reflecting a system correction coefficient related to a system loss on an electromagnetic wave reflection cross-sectional area value obtained by synthesizing the first and second electromagnetic wave reflection cross-sectional areas based on the log conversion coefficient, The contents described with reference to [Expression 1] and [Expression 2] may be applied. That is, the RCS imaging module 422 extracts RCS values of 30 dB or more by synthesizing measured data for each attenuation interval, and finally calculates the system loss including the spatial loss, the lens antenna, the reflector and the receiving antenna, and the WG transition Dimensional image with a dynamic range of 30 dB considering the image system correction factor ISCF (image system correction factor). (1) to (7) are used for extracting RCS measurement values in the RCS measurement mode, and (1) to (6) and (8) are used in RCS imaging Mode is used to extract RCS image measurement values. That is, Equations (2) to (8) show that a value obtained by correcting the ISCF to a value obtained by summing the values measured for each pixel, that is, the power, in the entire image corresponds to the final RCS image measurement value of the measurement object . Here, ISCF is calculated as the difference between the simulated RCS image value of the measurement object and the measured RCS image value.

Preferably, the RCS imaging module 422 converts the measurement data for the background electromagnetic reflection cross-sectional area into decibel (dB) data, and uses the log conversion factor computed based on the measurement data for the first and second electromagnetic wave reflection cross- The background image can be extracted by reflecting the correction coefficient of the image system related to the system loss to the background electromagnetic wave reflection cross-sectional area value. Here, the process of extracting the background image may be applied to the description described above with reference to FIG. 5, [Equation 1], and [Equation 2].

Next, the RCS imaging module 422 extracts the difference image between the extracted image and the background image based on the measurement data of the first and second electromagnetic wave reflection cross-sectional areas, corrects the measured object, and then extracts the final image have.

More specifically, a method of measuring the background electromagnetic wave reflection cross-sectional area will be described. Here, the process of measuring the background electromagnetic wave reflection cross-sectional area may be performed before step S1110, or after step S1140, but may be performed independently of the order with each step shown in Fig. Preferably, the periphery of the measurement object is made of an anechoic environment to reduce the reflection signal, and the reflection signal generated from the periphery of the measurement object can be corrected by measuring the background electromagnetic wave.

13, the RCS imaging module 422 scans the background of the measurement object for each polarized wave in the case of liquid nitrogen and a hot absorber in the case of a cold source, (step S1310). At least two reference temperatures (low and high temperature) are required to measure any temperature, and the cold source is the most stable liquid nitrogen present on the earth as the reference temperature measurement object, the cold source for liquid nitrogen, The low temperature standard corresponding to 77 Kelvin's Bacoul can be equivalent to 77 Kelvin. The hot source is used on a high temperature basis, and an absorber can be used in a constant temperature (eg, 300 K for indoor room temperature) or a matched load (mainly using 50 ohm termination) or at a constant temperature. Here, the absorber is used for the purpose of electromagnetic wave anti-reflection, and the reflection must be -40 to -50 dB or less at maximum. That is, the absorber used as a hot source means a hot source having a constant value of 300K while no reflected wave exists.

The RCS imaging module 422 extracts parameters for brightness temperature conversion of the image using the following Equation 3 based on the measured values of the image pixels obtained in Step S1310 (Step S1320).

[Equation 3]

는 각 픽셀에 대한 기울기 계수,

는 각 픽셀에 대한 절편 계수,

는 핫 타겟(hot target)의 BT,

는 콜드 타겟(cold target)의 BT,

는 핫 타겟에 대한 각 픽셀의 획득전압,

는 콜드 타겟에 대한 각 픽셀의 획득전압을 나타낸다.From here,

Is the slope coefficient for each pixel,

Is the intercept coefficient for each pixel,

BT of the hot target,

BT of the cold target,

Is the acquired voltage of each pixel with respect to the hot target,

Represents the obtained voltage of each pixel with respect to the cold target.

The RCS imaging module 422 extracts the brightness temperature of the image with respect to the background absorber for correcting the image generated from the background using the following Equation 4 (step S1330).

[Equation 4]

는 배경 흡수체 영상의 각 픽셀에 대한 밝기온도(brightness temperature: BT), X_i,j는 영상에서 각 픽셀별 측정 위치에 따른 각 픽셀에 대한 전압값을 나타낸다. 배경 흡수체로부터 측정된 각 픽셀의 출력전압은

이며 [수식 3]에서 구한

,

값을 이용하여 흡수체 배경에 대한 밝기온도 값

이 구해진다. From here,

Is the brightness temperature (BT) for each pixel of the background absorber image, and X _{i, j} is the voltage value for each pixel according to the measurement position of each pixel in the image. The output voltage of each pixel measured from the background absorber is

Lt; RTI ID = 0.0 >

,

Value to determine the brightness temperature value for the absorber background

Is obtained.

When the brightness temperature value of the image for the background absorber is extracted in step S1330, the RCS imaging module 422 checks the correction state after correcting the difference (step S1340). In the embodiment, when the following expression (5) is satisfied, the background image is corrected and the background image after correction as shown in (b) of FIG. 14 is obtained from the background image before correction as shown in In another embodiment, if [Expression 5] below is not satisfied, steps S1310 to S1340 can be repeated by adjusting the arrangement of the absorber.

[Equation 5]

는 보정 후 측정된 배경의 각 픽셀별 밝기온도,

는 보정 전 각 픽셀별 밝기온도이며, 이 두 값이 일치하는지 여부로 보정이 이루어졌음 확인될 수 있다. 위의 배경에 대한 보정 예시는 RCS 배경 보정에도 같은 방법이 적용될 수 있다.From here,

Is the brightness temperature of each pixel of the measured background after correction,

Is the brightness temperature of each pixel before the correction, and it can be confirmed that the correction is made whether or not the two values are matched. The correction example for the above background can be applied to the RCS background correction as well.

15 and 16 are exemplary views of the electromagnetic wave reflection cross-sectional area measured according to the present invention.

15 and 16, FIG. 15 is an example of an electromagnetic wave reflection cross section for a measurement object measured using a continuous wave signal, FIG. 16 is an example of an electromagnetic wave reflection cross section for a measurement object measured using a noise signal (FEKO (GO)) values for a rectangular plate, a prism, and a spherical measurement object, and the electromagnetic wave reflection cross-sectional area values measured in the RCS measurement mode of the electromagnetic wave cross-sectional area measurement system according to the present invention. Here, the simulation value is a numerical value calculated for an ideal case.

The results shown in Figs. 15 and 16 are the values of the electromagnetic wave reflection cross-sectional area when the measurement object is observed at 0 degrees and the values of the electromagnetic wave reflection cross-sectional area when the measurement object is observed at +/- 10 degrees and the values measured according to the present invention It can be seen that they are almost exactly matched. In addition, when the object to be measured is a spherical and cylindrical shape, the value of the electromagnetic wave reflection cross-sectional area is constant even if the observation angle is changed. In the case of the rectangular plate shape, the electromagnetic wave reflection cross-sectional area value changes according to the observation angle.

15 and 16 show only the relationship between the measured angle and the value of the electromagnetic cross sectional area of the electromagnetic wave reflected by the XY axis, the measured value of the electromagnetic cross sectional area can be measured by rotating the object to be measured, The method of displaying the value is not limited to this, and various methods can be applied.

17 is an exemplary view of an electromagnetic wave reflection cross section imaged according to the present invention.

Referring to FIG. 17, there is shown a three-dimensional image of the electromagnetic reflection cross section for a reduced plane model imaged in accordance with the present invention as an example of the reflected electromagnetic wave reflection cross section for a noise transmit signal source. Referring to FIG. 17, it can be seen that the features of the reduced measurement object, that is, the features of the airplane, such as a wing shape and an airplane body shape, are shown. Therefore, according to the present invention, a three-dimensional image of the measurement object as shown in FIG. 17 can be obtained, and the shape and position of the electromagnetic wave reflection cross-sectional area distribution can be visually confirmed to be applied to the RCS optimization of the measurement target structure.

Meanwhile, the electromagnetic wave reflection cross-sectional area measurement and imaging method according to an embodiment of the present invention can also be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

For example, the computer-readable recording medium includes a ROM, a RAM, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, a removable storage device, a nonvolatile memory, , And optical data storage devices.

In addition, the computer readable recording medium may be distributed and executed in a computer system connected to a computer communication network, and may be stored and executed as a code readable in a distributed manner.

Although the preferred embodiments of the method and system for measuring the cross-sectional area of an electromagnetic wave according to the present invention have been described above, the present invention is not limited to the embodiments and various changes and modifications may be made within the scope of the claims, And this also belongs to the present invention.

110: transmission signal source
120: Electromagnetic wave reflection cross section measurement and imaging device
121: receiver 122: probe
123: video camera 124: computer
125: 2D scanner 126: power supply
130: support device 131: support
132: rotating plate 133: absorber
310: Lens antenna 320: Reflector
331: Vertically polarized wave antenna 332: Horizontal polarized wave antenna
333: Circularly polarized antenna
410: Data acquisition unit 420: Data processing unit
421: RCS measurement module 422: RCS imaging module
430: scanner control unit 440:

Claims (11)

A lens antenna which is output from a transmission signal source and collects and passes a signal reflected from the measurement object;
A reflection plate that reflects a signal from the lens antenna;
A receiver for receiving a signal reflected by the reflection plate through a reception antenna;
A detector for converting the power received from the receiver into a voltage;
A video camera for capturing an image of the measurement object; And
And a receiver driver for enabling a scanning operation in which the receiver is moved in an XY plane while receiving reflected waves,
Wherein the information of the receiver and the video camera is provided to a computer for an electromagnetic wave reflection cross-sectional area and an imaging.
The method of claim 1,
The scanner includes a base,
Wherein the lens antenna includes a lens antenna support provided on an upper portion of the base for supporting the lens antenna so as to adjust the height of the lens antenna and adjust the distance to the object to be measured, .
3. The method of claim 2,
The lens-
A cradle mounted on the slide installed in the base so as to be movable forward and backward;
Guide rods extending in the height direction on both sides of the cradle;
An upper and a lower supporter supported at both ends of the guide rod and supporting upper and lower portions of the lens antenna; And
And a fixing table for supporting the upper end of the guide rod.
The method of claim 3,
Wherein the video camera is mounted on the upper support.
The method according to claim 1,
Wherein the reflection plate includes a reflector support which is installed on a base at a rear side of the lens antenna and supports the reflector so as to adjust the height and angle of the reflector.
The method according to claim 1,
The receiver driver of the scanner
And a step motor for supporting the receiver on an upper side and driving the receiver in X and Y directions.
The method according to claim 6,
And a Z-axis direction transferring unit for moving the receiver in the Z direction.
The method according to claim 1,
The scanner includes:
A base,
And a receiver driver installed in the base and feeding the receiver in the X and Y directions while supporting the receiver,
And a lens antenna support for supporting the lens antenna so as to be adjustable in height with respect to the base and with the object to be measured,
And a reflector support for supporting the reflector to adjust the height and angle of the reflector to the rear side of the lens antenna support,
And a carrier for enabling the movement and the horizontal adjustment of the base is provided on the bottom surface of the base.
The method according to claim 1,
Wherein the receive antenna comprises a horizontal polarized antenna and a vertically polarized antenna, or comprises a circularly polarized antenna.
An apparatus for measuring and imaging an electromagnetic wave reflection cross-sectional area according to any one of claims 1 to 9,
A transmission signal source installed on the side of the electromagnetic wave reflection cross-sectional area measurement and imaging device and outputting a signal; And
And a supporter installed on the front side of the electromagnetic radiation cross-sectional area measurement and imaging apparatus, the supporter including a supporter on which the supporter is supported, and a rotating plate for rotating the supporter to adjust the angle of the supporter Electromagnetic wave reflection cross section measurement and imaging system.
11. The method of claim 10,
A support plate for supporting the support plate on which the transmission signal source is fixed and supporting the support plate so as to be connected to one side of the electromagnetic wave reflection cross section measurement and imaging device; The transmission source including a plurality of elevation members coupled to the electromagnetic radiation cross-sectional area measurement and imaging device;
And a connecting plate which is connected to one side of the rotary plate of the support unit and fixed to the other side of the electromagnetic wave cross-sectional area measuring and imaging device and which is configured to be stretchable and rotatable, the support unit comprising: Combined; Wherein the electromagnetic radiation reflection cross-sectional area measurement and imaging system comprises:

Images