CN112904583B - Radio frequency/optical composite target simulation device and method - Google Patents
Radio frequency/optical composite target simulation device and method Download PDFInfo
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- CN112904583B CN112904583B CN202110154374.9A CN202110154374A CN112904583B CN 112904583 B CN112904583 B CN 112904583B CN 202110154374 A CN202110154374 A CN 202110154374A CN 112904583 B CN112904583 B CN 112904583B
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Abstract
The invention provides a radio frequency/optical composite target simulation device and a method, which comprise a radio frequency radiation signal source, a radio frequency adjusting mechanism, a reflecting surface, an optical radiation signal source, a relay optical system, a transmission frequency inverse optical conformal system and a supporting structure. An optical radiation source generates an optical radiation signal, and the optical radiation signal is collimated into parallel beams through a relay optical system and an optical common reflecting surface and is emitted; the radio frequency feed source generates a radio frequency radiation signal, and the radio frequency radiation signal is collimated into an approximate plane beam through the reflecting surface and the transmission frequency reflection optical conformal system to be emitted. The invention provides a radio frequency/optical composite target simulation device and a method, which adopt the conformal design of a radio frequency reflecting surface and an optical reflecting surface, the structures of two signal sources are not interfered with each other, the common-caliber and non-common-caliber output of radio frequency signals and optical signals is realized, output signals are not shielded in all calibers, and the radio frequency/optical composite target simulation device can be integrated on two frames of a five-axis turntable target.
Description
Technical Field
The invention relates to the field of semi-physical simulation, detection, remote sensing and spectral analysis, in particular to a radio frequency/optical composite target simulation device and method. And more particularly, to a compact range rf/optical composite target simulation apparatus and method of conformal design.
Background
In the field of accurate guidance detection, a composite guidance detection system is increasingly used due to the fact that the composite guidance detection system has a long working distance, high precision and strong anti-interference capability. In order to verify the performance of the guidance system, a semi-physical simulation method is mostly adopted to carry out test verification on the guidance detection system. The core component in the semi-physical simulation test is a composite target simulation device, and the core component mainly has the function of simulating radio frequency and optical physical signals emitted by a target and is received by a detected guidance detection system. The guidance system simultaneously receives radio frequency and optical physical signals, and the common caliber output of the radio frequency and the optical signals of the target simulation device must be ensured; along with the development and evolution of a guidance system, the difficulty of target simulation is also caused by the fact that radio frequency and optical physical signals are received at the same time in different aperture different axes.
The common-caliber composite target simulation device is a radio-frequency optical common-caliber composite target simulation device (ZL 201810036859.6) with a medium transmission structure, a radio-frequency holographic transmission/light reflection type common-caliber composite plane wave field simulation device (application No. 201810421665.8), an infrared and microwave beam synthesis method, an infrared and microwave beam synthesis device and a system thereof (application No. 20140483850.1) and the like. According to the infrared and microwave beam synthesis method, the device and the system (201410483850.1) thereof, infrared is transmitted through the metal mesh grid with curvature matched with a paraboloid, the infrared imaging quality is poor, the energy utilization rate is high, and the infrared imaging and microwave compounding cannot be realized. And the public report mostly meets the output of a radio frequency/optical common-caliber composite signal, a radio frequency/optical composite of a split-caliber compact range or a composite device meeting split-caliber and common-caliber requirements at the same time does not exist, and the test of a detection system for the split-caliber of the radio frequency/infrared photoelectric axis which is not concentric and not coaxial cannot be realized.
Disclosure of Invention
In view of the defects in the prior art, the present invention provides an rf/optical composite target simulation apparatus and method.
The invention provides a radio frequency/optical composite target simulation device, which comprises a radio frequency radiation signal source, a radio frequency adjusting mechanism, a reflecting surface, an optical radiation signal source, a relay optical system, a transmission frequency inverse optical conformal system and a supporting structure, wherein:
an optical signal emitted by the optical radiation signal source is reflected by the relay optical system and the transmission frequency reflection optical conformal system and collimated into a parallel light beam to be emitted;
the signal emitted by the radio frequency radiation signal source is collimated into a quasi-plane wave after being transmitted by the reflecting surface and the transmission frequency reflection optical conformal system and then output;
the radio frequency adjusting mechanism is used for adjusting the motion of the radio frequency radiation signal source;
the support structure is used to support the reflective surface and the transmissive frequency inverse optical conformal system.
Preferably, the optical signal emitted by the optical radiation signal source comprises infrared light, ultraviolet light, visible light or laser light.
Preferably, the optical radiation signal source comprises a point signal source or an image signal source.
Preferably, the source of radio frequency radiation signals comprises a corrugated horn antenna or a triplet array.
Preferably, the radio frequency adjustment mechanism employs a two-dimensional translation stage.
Preferably, the reflective surface and the transmission frequency anti-optical conformal system are designed and optimized for collimation of the radio frequency radiation signal and the optical radiation signal respectively, and the radio frequency radiation signal source and the optical radiation signal source are structurally independent.
Preferably, the radio frequency adjusting mechanism controls a radio frequency phase center to realize high-precision output of the electric shaft.
Preferably, the radio frequency radiation signal and the optical radiation signal are output by a coaxial common-caliber composite output or a non-common-caliber composite output.
Preferably, the surface of the supporting structure is pasted with the wave-absorbing material.
The invention also provides a method, comprising the following steps:
step S1: an optical radiation signal source generates an optical radiation signal, the optical radiation signal passes through a relay optical system and is reflected and collimated by a transmission frequency reflection optical conformal system to be a parallel light beam to be emitted;
step S2: the radio frequency radiation signal source generates a radio frequency radiation signal, and the radio frequency radiation signal is reflected by the reflecting surface and forms an approximate plane wave to be emitted through the transmission collimation of the transmission frequency reflection optical conformal system;
and step S3: when the optical axis is coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output coaxially and in the same aperture, and when the optical axis is not coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output non-coaxially in different apertures.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention avoids the problems of high processing precision and difficult processing of the metal reflecting surface caused by the radio frequency/optical shared reflecting surface through the conformally designed radio frequency reflecting surface and optical system structure, and is suitable for radiation output of a five-axis turntable space in a compact space, and radio frequency and optical shared caliber and sub-caliber radiation output.
2. According to the invention, through the conformal radio frequency reflecting surface and the optical system structure, the problems of poor infrared imaging quality and small infrared exit pupil diameter caused by large size and low surface shape precision of a flat plate type or film type beam synthesizer are solved.
3. According to the invention, through the design of the transmission frequency reflection optical conformal system, the optical radiation signal source and the radio frequency radiation signal source are arranged at different positions and are not interfered with each other, so that the problem of mutual interference of signal source positions caused by a radio frequency/optical shared reflecting surface (the focal position is unique) is solved.
4. The invention realizes the output of the common caliber and the non-common caliber of the radio frequency signal and the optical signal.
5. The invention can realize the simultaneous large-caliber output of radio frequency signals and optical signals, meet the requirements of performance test of the detection system with non-concentric and non-coaxial branch calibers of radio frequency/infrared photoelectric axes, and also meet the requirements of performance test of the detection system with coaxial and common calibers of radio frequency/infrared photoelectric axes.
6. The invention has compact structure through the radio frequency reflecting surface and the optical system which are designed in a conformal way, and can be arranged on a five-axis turntable.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of the structure of a conformal RF/optical composite target simulation apparatus according to the present invention.
FIG. 2 is a schematic structural diagram of a coaxial common-caliber RF/optical composite target simulation device according to the present invention.
Fig. 3 is a schematic structural diagram of the split-aperture rf/optical composite target simulation apparatus according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.
Referring to fig. 1 to 3, the conformally designed rf/optical composite target simulation apparatus and method according to the present invention includes an rf radiation signal source 1, an rf adjusting mechanism 2, a reflective surface 3, an optical radiation signal source 4, a relay optical system 5, a transmissive inverse optical conformal system 6, and a supporting structure 7.
The device realizes the common-caliber composite method of the radio frequency/optical composite target: an optical radiation signal is generated by an optical radiation signal source, passes through a relay optical system, and is reflected and collimated by a transmission frequency reflection optical conformal system to be a parallel light beam to be emitted; the radio frequency radiation signal source generates a radio frequency radiation signal, and the radio frequency radiation signal is reflected by the reflecting surface and forms an approximate plane wave to be emitted through the transmission collimation of the transmission frequency reflection optical conformal system; when the optical axis is coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output coaxially and in the same aperture, and when the optical axis is not coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output non-coaxially in different apertures. The relay optical system is a transmissive optical system.
The radio frequency signal band depends on the operating band of the radio frequency radiation signal source 1, and the radio frequency radiation signal source 1 is a corrugated horn antenna which can generate radio frequency radiation signals. In order to achieve the radio frequency quiet zone characteristic of approximate plane wave, the antennas with different working wave bands are designed, and the coverage from the X wave band to the W wave band can be realized by replacing the antennas with different specifications. The radio frequency radiation signal source can also be a triple array, and the control of the beam emergent angle in a certain range can be realized through the control of the amplitude and the phase, and the output of a multi-channel signal can be realized.
The radio frequency adjusting mechanism 2 is a two-dimensional moving motor, so that a radiation signal source moves in two-dimensional directions within a certain range, the phase center can be adjusted, and the infrared optical axis can be adjusted through the position of the transmission frequency inverse optical conformal system, so that the high-precision calibration of the electric axis is realized.
The radio frequency radiation signal is collimated into approximate plane wave output after passing through the reflecting surface 3 and the transmission frequency reflection optical conformal system 6, the reflecting surface 3 is polished by adopting a metal material, and the edge diffraction effect is eliminated by adopting a curled edge or a side tooth.
The reflecting surface 3 and the transmission frequency anti-optical conformal system 6 are designed and optimized aiming at the collimation of the radio frequency radiation signal and the optical radiation signal respectively, the radio frequency radiation signal source and the optical radiation signal source are located at the focuses of different surfaces, and the radio frequency radiation signal source and the optical radiation signal source are independent in structure and do not interfere with each other.
The optical signal emitted by the optical radiation signal source 4 includes various wave bands and working systems such as infrared, ultraviolet, visible light and laser, and the signal source can be a point signal source or an image signal source, such as a resistor array, a spatial light modulator, a black body, a laser, etc.
The design of the transmission frequency inverse optical conformal system in the optical path can realize the coaxial common-caliber/non-coaxial branch-caliber compounding of the radio frequency/optical compound target. By utilizing the design of the transmission frequency anti-optical conformal system, the radio frequency radiation signal source and the optical radiation signal source are respectively arranged at different positions and do not interfere with each other, and the structure is compact and can be integrated on a five-axis turntable for use.
The supporting structure 7 is used for fixing a signal source, a reflecting surface and the like of the target simulation device, and the surface of the supporting structure is pasted with a wave-absorbing material.
The transmission frequency reflection optical conformal system 6 is a transmission frequency reflection optical structure, and the surface of the quartz glass is plated with an optical reflection dielectric film which is designed by matching with a reflecting surface structure. The reflecting surface shown in fig. 2 is an off-axis paraboloid structure, and the front surface of the reflecting surface of the transmission frequency inverse optical conformal system is a paraboloid or a hyperboloid, etc. The focal positions of the two surface models are inconsistent, and the installation positions of the radio frequency radiation signal source and the optical radiation signal source are not interfered with each other.
The exit pupil diameter of the optical radiation signal source can be very large due to the conformal structure and different sizes of the transmission frequency anti-optical conformal system and the main reflecting surface; the radio frequency radiation signal and the optical radiation signal can be output in a coaxial common-caliber composite mode or in a non-common-caliber composite mode.
When the size of the transmission frequency inverse optical conformal system 6 covers the range of radio frequency and optical composite apertures, the radio frequency and optical adjusting mechanism adjusts to ensure that the radio frequency radiation phase center is coincided with the center of the optical axis, and at the moment, the radio frequency signal and the optical signal are output coaxially and in the same aperture. Here, the radio frequency band is Ka, the aperture (projection plane linear distance) of the reflecting surface 3 is 400mm, and the transmission frequency reflection optical conformal system 6 is glued on the reflecting surface 3 to perform surface shape processing and film coating, so that signal compounding of 400mm large exit pupil diameter can be satisfied. Therefore, the radio frequency/optical radiation signal is output with a large caliber at the same time, and the receiving and performance test of a detection system with a photoelectric axis eccentric and non-coaxial caliber can be met.
When the radio frequency and the optical signals are different from coaxial composite, the position or the size of the transmission frequency inverse optical conformal system is changed, and the radio frequency radiation and the infrared radiation are radiated according to respective paths. The requirements of receiving and performance testing of the photoelectric axis aperture-dividing detection system are met.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A radio frequency/optical composite target simulation device is characterized by comprising a radio frequency radiation signal source, a radio frequency adjusting mechanism, a reflecting surface, an optical radiation signal source, a relay optical system, a transmission frequency inverse optical conformal system and a supporting structure, wherein:
the radio-frequency signal emitted by the radio-frequency radiation signal source is transmitted by the relay optical system (5), the reflecting surface (3) and the transmission frequency inverse optical conformal system (6) and collimated into parallel beams to be emitted;
the optical signal emitted by the optical radiation signal source is collimated into a quasi-plane wave to be output after being reflected by the transmission frequency inverse optical conformal system (6);
the radio frequency adjusting mechanism is used for adjusting the motion of the radio frequency radiation signal source;
the supporting structure is used for supporting the reflecting surface and the transmission frequency inverse optical conformal system;
the transmission frequency reflection optical conformal system is of a transmission frequency reflection optical structure, the surface of quartz glass is plated with an optical reflection dielectric film, the transmission frequency reflection optical conformal system is designed in a matching way with a reflecting surface structure, the reflecting surface is of an off-axis paraboloid structure, the front surface of the reflecting surface of the transmission frequency reflection optical conformal system is of a paraboloid or a hyperboloid, and the focal positions of two surface models are inconsistent.
2. The rf/optical composite target simulation device according to claim 1, wherein the optical signal emitted from the optical radiation signal source comprises infrared light, ultraviolet light, visible light or laser light.
3. The rf/optical composite target simulation device of claim 1, wherein the optical radiation signal source comprises a point signal source or an image signal source.
4. The rf/optical composite target simulation device of claim 1, wherein the rf radiation signal source comprises a corrugated horn antenna or a triad array.
5. The rf/optical composite target simulation device of claim 1, wherein the rf adjustment mechanism employs a two-dimensional translation stage.
6. The rf/optical composite target simulation device of claim 1 wherein the reflective surface and the trans-frequency anti-optical conformal system are configured to provide independent rf radiation signal source and optical radiation signal source for design and optimization of the collimation of the rf radiation signal and the optical radiation signal, respectively.
7. The rf/optical composite target simulator of claim 1, wherein the rf adjusting mechanism controls the rf phase center to achieve high precision output of the electric axis.
8. The rf/optical composite target simulation device of claim 1, wherein the rf radiation signal and the optical radiation signal are output as a coaxial common-caliber composite or non-common-caliber composite.
9. The radio frequency/optical composite target simulation device according to claim 1, wherein the surface of the support structure is attached with a wave-absorbing material.
10. A method based on the rf/optical composite target simulation apparatus of any one of claims 1 to 9, comprising the steps of:
step S1: a radio frequency radiation signal source generates a radio frequency radiation signal, the radio frequency radiation signal passes through a relay optical system and a reflecting surface (3) and is transmitted and collimated into a parallel light beam through a transmission frequency reflection optical conformal system (6) to be emitted;
step S2: the optical radiation signal source generates an optical radiation signal, and the optical radiation signal is reflected and collimated by the transmission frequency inverse optical conformal system (6) to form an approximate plane wave to be emitted;
and step S3: when the optical axis is coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output coaxially and in the same aperture, and when the optical axis is not coincident with the radio frequency electric axis, the radio frequency and optical radiation signals are output non-coaxially in different apertures.
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| US7453835B1 (en) * | 2005-04-14 | 2008-11-18 | At&T Intellectual Property Ii, L.P. | Arrangement for overlaying optical (such as FSO) and radio frequency (such as WiMAX) communications networks |
| US9865921B2 (en) * | 2013-01-28 | 2018-01-09 | Bae Systems Plc | Directional multi-band antenna |
| CN203606568U (en) * | 2013-10-31 | 2014-05-21 | 北京仿真中心 | Optical system |
| US9894273B2 (en) * | 2015-08-25 | 2018-02-13 | Rockwell Automation Technologies, Inc. | Modular lens for extremely wide field of view |
| CN107357029B (en) * | 2017-09-01 | 2019-12-03 | 天津津航技术物理研究所 | A kind of millimeter wave/LONG WAVE INFRARED Shared aperture complex imaging camera lens |
| CN108693653A (en) * | 2018-05-04 | 2018-10-23 | 上海机电工程研究所 | Radio frequency holographic transmission/light reflection formula Shared aperture composite plane wave-field simulation device |
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| CN108333788A (en) * | 2018-01-15 | 2018-07-27 | 上海机电工程研究所 | Radio frequency and infrared beams complex method and simulator |
| CN108415172A (en) * | 2018-01-15 | 2018-08-17 | 上海机电工程研究所 | The radio frequency optics Shared aperture complex target simulator and method of medium transmittance structure |
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