CN106385527A - Microwave single pixel imaging front end device - Google Patents
Microwave single pixel imaging front end device Download PDFInfo
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- CN106385527A CN106385527A CN201610813969.XA CN201610813969A CN106385527A CN 106385527 A CN106385527 A CN 106385527A CN 201610813969 A CN201610813969 A CN 201610813969A CN 106385527 A CN106385527 A CN 106385527A
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- Prior art keywords
- raceway groove
- mask plate
- single pixel
- electromagnetic wave
- imaging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Aerials With Secondary Devices (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a microwave single pixel imaging front end device which comprises an imaging diffraction lens, a mask plate, a diffraction lens, a sensor feed-source horn and an electromagnetic wave lighting horn, wherein the mask plate comprises a PCB and a sub-wavelength metallic array arranged on the PCB, the sub-wavelength metallic array comprises a plurality of units, and resonant frequency of at least one unit is different with the same of other units. Since the mask plate comprises a plurality of resonant frequencies, the electromagnetic wave adopting only one mask plate can adapt a plurality of resonant frequencies and can obtain a plurality of measuring modes, the mask plate has no need to change, the device has simple structure, and the cost is low.
Description
Technical field
The present invention relates to a kind of microwave single pixel imaging front device.
Background technology
Microwave (inclusion millimeter wave) imaging technique battlefield early warning with monitor, the navigation of naval vessel and aircraft, personal security check etc.
Aspect all has great application demand.Compared with visible ray and infrared imaging, microwave can with the decay of very little penetrate smog,
Dust and yarn fabric, possess all weather operations and detect the ability concealing the dangerous materials under medicated clothing.
Traditional microwave imaging system is substantially segmented into two classes：Single-sensor (pixel) scanning imaging system and polynary
(pixel) phased array system.Single-sensor scanning system (including the scanning to scene and the focal plane scanning of image device) is as schemed
Shown in 1, it has low-cost advantage, but due to a pixel once can only be obtained, its performance particularly realtime imaging aspect
It is difficult to meet application demand.Polynary imaging system can obtain whole pixels of image simultaneously, is better than patrilineal line of descent with only one son in each generation sense in performance
Device system, but volume, weight and one-tenth present aspect are sacrificed too much.
Either single-sensor scanning imaging system or multiple phase control array 1 system, the basic reason restricting their performances exists
The traditional imaging mode being based in it.This tradition image signal acquisition of imaging mode and processing procedure are as shown in Fig. 2 head
First signal sampling (obtaining N number of sampled point) is carried out for criterion with nyquist sampling theorem to original scene signal, then carry out
Compress, then be transferred to processor and carry out signal processing, finally decompression obtains electronic image and exports on display.From above-mentioned one-tenth
As process can be seen, the data capture method of traditional " first sampling-recompression-post processing ", simply in compression process
Throw away substantial amounts of redundancy, in order to obtain real image, need original scene is carried out substantial amounts of data sampling, storage and
Transmission.Data (i.e. picture signal is typically sparse) useless in a large number is generally comprised in actually one width original image, but
These data are all gathered, process by traditional imaging mode, and with computing resource but also so that microwave becomes not only to have wasted substantial amounts of storage
As system is extremely complex and performance is not good, single-sensor scanning system needs mechanical actuation device to scan, and image taking speed is slow, and
Then cost intensive, volume weight are larger for polynary imaging system.
Most of picture signals of nature are all sparse, and for this kind of signal, Candes et al. proposed in 2006
Compressive sensing theory (Compressive Sensing-CS), is to solve aforementioned conventional based on this theoretical CS imaging technique
The good recipe of mm-wave imaging problem.
CS theoretical breakthrough nyquist sampling theorem bottleneck is it is believed that be not dependent on signal to the sampling quantity of picture signal X
Bandwidth, and depend on the internal structure of signal.If signal X is sparse or is sparse in certain transform domain, that
Just with uncorrelated to conversion base and meet the constraint isometry (RIP) a calculation matrix Φ, high dimensional signal can be projected
Obtain the signal data Y of dimensionality reduction to lower dimensional space, then pass through to solve l0Norm minimum optimization problem is from a small amount of projection
In measurement, primary signal is reconstructed with high probability.CS theoretical proof：If detected signal X possesses sparse characteristic, obtain
Measurement data necessary to signal is suitable with its degree of rarefication K magnitude, and is much smaller than the dimension N of signal.Obviously, " measurement number here
According to " it is no longer rectangular pulse uniform sampling in Shannon-Nyquist theorem, but projection Y in particular matrix for the signal,
I.e.
Y=Φ X (1)
Wherein M dimensional vector Y is measurement data, and M × N-dimensional matrix Φ is called that calculation matrix (it is true that working as M=N, and takes Φ
When for unit matrix, formula (1) deteriorates to traditional sample mode).In compressive sensing theory, obtain the measurement needed for X
Number (i.e. line number of matrix Φ) is about M=O (K log (N/K)), and this is a far smaller than number of N.
Compared with tradition imaging, the theoretical core concept of CS is that " sampling " and " compression " this two work are incorporated into one
During realize, Fig. 3 is the image signal acquisition and handling process based on compressed sensing.Using than Nyquist sampling much less
Noncoherent one group (M) linear measurement realize that one sparse or the measurement collection Y of compressible signal X, then from measurement collection Y
Recover signal X, thus saving ample resources.
Specific to the realization of CS imaging system, key therein is how to utilize hardware device, automatically controlled realizes calculation matrix
Φ, one can the single-sensor imaging optical system theoretical based on CS for reference as shown in Figure 4.In imaging len and image plane
Between be provided with mask plate, the electromagnetic wave of object scene scattering masked plate compression sampling, the electromagnetism letter after sampling after lens
Number, can receive, store by being arranged on the sensor of image plane, thus obtaining the measurement data of a compression sampling, Duo Shuowen
Offer and it is referred to as a measurement pattern.Changing mask plate, another measurement pattern being obtained, as long as there being enough masks
Plate (as an example, only gives 4 mask plates of replacing to obtain it is possible to obtain the required enough measurement patterns of CS imaging below Fig. 3
Four measurement patterns arriving), then pass through signal handler, inverting obtains the image of scene.Can see from narration above,
By M mask plate compression sampling, M measurement pattern can be obtained, this M measurement pattern is combined i.e. composition calculation matrix
Φ, and the line number of matrix Φ is M.
It can be seen that, CS imaging system of the prior art needs to obtain multiple measurement moulds by multiple mask plate of changing
Formula, so requires that CS imaging system has enough mask plates, system complex, high cost.And, CS of the prior art
Imaging system needs mechanically to change mask plate, operates more complicated.
Content of the invention
Goal of the invention：It is an object of the invention to provide a kind of only need one piece of mask plate, without the microwave list changing mask plate
Pixel imaging front device.
Technical scheme：For reaching this purpose, the present invention employs the following technical solutions：
Microwave single pixel imaging front device of the present invention, including imaging diffraction lenss, mask plate, diffraction lenss,
Sensor Feed Horn and electromagnetic wave illumination loudspeaker, wherein, mask plate includes pcb board and the sub-wavelength gold being produced on pcb board
Belong to array, sub-wavelength metal array includes the resonance frequency of multiple units, at least resonant frequency of a unit and other units
Rate is different.
Further, described unit is complementary inductance capacitance unit, the size of at least one complementary inductance capacitance unit and its
The size of his complementary inductance capacitance unit is different；Complementary inductance capacitance unit includes the metal level having etched raceway groove, and raceway groove includes
Rectangular ring raceway groove, each extends over out the first T-shaped raceway groove and the second T-shaped raceway groove from two parallel edges of rectangular ring raceway groove.
Further, described first T-shaped raceway groove and the second T-shaped raceway groove is equivalently-sized.
Beneficial effect：The present invention proposes a kind of microwave single pixel imaging front device, and mask plate therein has multiple
Resonant frequency, therefore, the electromagnetic wave being just adapted to multi-frequency only with this part mask plate obtains multiple measurement patterns, no
Need to change mask plate, device architecture is simple, low cost is easy and simple to handle.
Brief description
Fig. 1 is single-sensor of the prior art (pixel) scanning imagery principle schematic；
Fig. 2 is that tradition imaging signal of the prior art obtains and processing mode schematic diagram；
Fig. 3 is that compressed sensing imaging signal of the prior art obtains and processing mode schematic diagram；
Fig. 4 is CS imaging optical system principle schematic of the prior art；
Fig. 5 is the schematic diagram of the microwave single pixel imaging front device in the specific embodiment of the invention；
Fig. 6 is the schematic diagram of the mask plate in the specific embodiment of the invention；
Fig. 7 is the schematic diagram of the complementary inductance capacitance unit in the specific embodiment of the invention；
Fig. 8 is using phase in mask plate during a kind of frequency electromagnetic wave source exposure field scenery body in the specific embodiment of the invention
The schematic diagram of the complementary inductance capacitance unit answered；
Fig. 9 is using the mask obtaining after a kind of frequency electromagnetic wave source exposure field scenery body in the specific embodiment of the invention
Pattern schematic diagram.
Specific embodiment
With reference to specific embodiment, technical scheme is further introduced.
This specific embodiment discloses a kind of microwave single pixel imaging front device, as shown in figure 5, including imaging diffraction
Lens 1, mask plate 2, diffraction lenss 3, sensor Feed Horn 4 and electromagnetic wave illumination loudspeaker 5.Wherein, mask plate 2 includes PCB
Plate and the sub-wavelength metal array being produced on pcb board, as shown in fig. 6, sub-wavelength metal array includes multiple complementary electrical electrifications
Hold unit (Complementary Electric Inductor Capacitors Elements).Complementary inductance capacitance unit
Maximum to the Electromagnetic wave penetrating percentage of characteristic frequency, and the electromagnetic wave to other frequencies is in high resistant characteristic, due to high q-factor during its resonance
Feature, be especially suitable for realizing the selectivity to different frequency electromagnetic wave for the different units.Therefore, at least one complementary electrical electrification
The size holding unit is different from the size of other complementary inductance capacitance units, leads at least one complementary inductance capacitance unit
Resonant frequency is different from the resonant frequency of other complementary inductance capacitance units.Complementary inductance capacitance unit includes having etched raceway groove
Metal level, as shown in fig. 7, raceway groove includes rectangular ring raceway groove 21, each extends over from two parallel edges of rectangular ring raceway groove 21
Go out the first T-shaped raceway groove 22 and the second T-shaped raceway groove 23.
The operation principle of microwave single pixel imaging front device is described below：Shone with the electromagnetic wave source of certain frequency first
Penetrate object scene, the electromagnetic wave of object scene reflection is imaged on its focal plane through imaging diffraction lenss 1, the covering of focal plane
The resonant frequency of some complementation inductance capacitance units of lamina membranacea 2 is identical with the frequency of this electromagnetic wave, the complementation that in Fig. 8, dotted line outlines
The resonant frequency of inductance capacitance unit is just identical with the frequency of this electromagnetic wave, therefore, these complementary inductance capacitances that dotted line outlines
Unit assumes cross-country traveling ability to electromagnetic wave, and other complementary inductance capacitance units due to resonant frequency and electromagnetic wave frequency not
Same, then electromagnetic wave is presented high resistance.Therefore, mask plate 2 assumes corresponding mask pattern to the electromagnetic wave of this frequency, such as Fig. 9
Shown, the white square in Fig. 9 represents to be passed through, and black bars represent high resistant.By the electromagnetic wave of mask plate 2 through diffraction lenss
3 focus at sensor Feed Horn 4, and are received by sensor Feed Horn 4, obtain a measurement pattern.In the same manner, Ke Yigai
Become the frequency of electromagnetic wave, obtain other measurement patterns.
As can be seen here, using this specific embodiment microwave single pixel imaging front device it is only necessary to this part mask
The electromagnetic wave that plate 2 is just adapted to multi-frequency obtains multiple measurement patterns it is not necessary to change mask plate, and device architecture is simple,
Low cost.
Claims (3)
1. a kind of microwave single pixel imaging front device it is characterised in that：Including imaging diffraction lenss (1), mask plate (2), spread out
Penetrate lens (3), sensor Feed Horn (4) and electromagnetic wave illumination loudspeaker (5), wherein, mask plate (2) includes pcb board and making
Sub-wavelength metal array on pcb board, sub-wavelength metal array includes multiple units, at least resonant frequency of a unit
Different from the resonant frequency of other units.
2. microwave single pixel imaging front device according to claim 1 it is characterised in that：Described unit is complementary inductance
Capacitor cell, the size of at least one complementary inductance capacitance unit is different from the size of other complementary inductance capacitance units；Complementary
Inductance capacitance unit includes the metal level having etched raceway groove, and raceway groove includes rectangular ring raceway groove (21), from rectangular ring raceway groove
(21) two parallel edges each extend over out the first T-shaped raceway groove (22) and the second T-shaped raceway groove (23).
3. microwave single pixel imaging front device according to claim 2 it is characterised in that：Described first T-shaped raceway groove
(22) and the second T-shaped raceway groove (23) equivalently-sized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813969.XA CN106385527B (en) | 2016-09-09 | 2016-09-09 | A kind of microwave single pixel imaging front device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813969.XA CN106385527B (en) | 2016-09-09 | 2016-09-09 | A kind of microwave single pixel imaging front device |
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| CN106385527A true CN106385527A (en) | 2017-02-08 |
| CN106385527B CN106385527B (en) | 2019-04-09 |
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| CN201610813969.XA Expired - Fee Related CN106385527B (en) | 2016-09-09 | 2016-09-09 | A kind of microwave single pixel imaging front device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113033723A (en) * | 2021-03-08 | 2021-06-25 | 山东大学 | Annular mask, light field regulation and control method, single-pixel imaging method and system |
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| WO2011159565A1 (en) * | 2010-06-15 | 2011-12-22 | The Curators Of The Unversity Of Missouri | Microwave and millimeter wave resonant sensor having perpendicular feed, and imaging system |
| CN202362479U (en) * | 2011-11-16 | 2012-08-01 | 电子科技大学 | Middle-infrared band transmission-type sub-wavelength metal grating |
| CN103153035A (en) * | 2013-04-09 | 2013-06-12 | 东南大学 | Frequency-adjustable microwave absorber |
| CN104301595A (en) * | 2014-10-31 | 2015-01-21 | 武汉理工大学 | Microwave flash shooting device of microwave camera |
-
2016
- 2016-09-09 CN CN201610813969.XA patent/CN106385527B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011159565A1 (en) * | 2010-06-15 | 2011-12-22 | The Curators Of The Unversity Of Missouri | Microwave and millimeter wave resonant sensor having perpendicular feed, and imaging system |
| CN202362479U (en) * | 2011-11-16 | 2012-08-01 | 电子科技大学 | Middle-infrared band transmission-type sub-wavelength metal grating |
| CN103153035A (en) * | 2013-04-09 | 2013-06-12 | 东南大学 | Frequency-adjustable microwave absorber |
| CN104301595A (en) * | 2014-10-31 | 2015-01-21 | 武汉理工大学 | Microwave flash shooting device of microwave camera |
Non-Patent Citations (2)
| Title |
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| 周长林: "基于压缩感知的毫米波无源成像方法及超分辨算法研究", 《中国优秀硕士学位论文全文数据库-信息科技辑》 * |
| 陈文波: "基于频率选择表面的毫米波压缩感知成像", 《量子电子学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113033723A (en) * | 2021-03-08 | 2021-06-25 | 山东大学 | Annular mask, light field regulation and control method, single-pixel imaging method and system |
| CN113033723B (en) * | 2021-03-08 | 2023-06-16 | 山东大学 | Annular mask, light field regulation and control method, single-pixel imaging method and system |
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| CN106385527B (en) | 2019-04-09 |
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