CN109061744A - A kind of computed tomography scanning imager - Google Patents
A kind of computed tomography scanning imager Download PDFInfo
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- CN109061744A CN109061744A CN201810767365.5A CN201810767365A CN109061744A CN 109061744 A CN109061744 A CN 109061744A CN 201810767365 A CN201810767365 A CN 201810767365A CN 109061744 A CN109061744 A CN 109061744A
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The present invention proposes a kind of computed tomography scanning imager, including the orderly cloud signal generator of finite state machine, the orderly cloud signal generator of finite state machine generates the orderly cloud signal of two-way: the orderly cloud signal of the first branch and the orderly cloud signal of second branch, further include: radiofrequency emitting module (2), for receiving the orderly cloud signal of the first branch, and the orderly cloud signal of the first branch is converted into radio-frequency transmissions and is gone out；Switch combination module (3) is eliminated for controlling and receiving the working sequence of module, and to the clutter of orderly cloud signal, output to receiving module；Receiving module, for carrying out delay and gain process to orderly cloud signal, treated, and signal is exported to correlation interference imaging module (8)；Correlation interference imaging module (8) carries out AD transformation, clutter cancellation and correlation interference to the orderly cloud signal after delay and gain process and handles, completes the tomography to detection target.
Description
Technical field
The present invention relates to radar remote sensing technology fields, and in particular to a kind of computed tomography scanning imager.
Background technique
Tomographic scanner is the lossless detection instrument for detecting surface layer flowering structure, it penetrates earth's surface using electromagnetic wave
Ability, the electromagnetic wave for being loaded with orderly cloud signal is internally emitted from surface layer, and electromagnetic wave is formed on the interface that dielectric property changes
Scattering, by receiving scatter echo signal, according to parameters such as its time delay, shape and spectral characteristics, solution translates target position, medium
Structure and property, on the basis of data processing, the recovery of application image and reconstruction technique are scanned at imaging target
Reason really and intuitively reproduces target under surface layer to reach.
Existing technology is returned due to using the coherent detection technology based on shock pulse signal, frequency-modulated continuous-wave signals
Wave signal is continuously relevant, therefore is influenced always by various clutters.Clutter is usually very strong, and with change in location, is difficult
It eliminates, brings difficulty to target acquisition.Almost all of existing means are all difficult to get rid of above-mentioned influence.
The Kind of Nonlinear Dynamical System that the orderly cloud signal of finite state machine is made of multicore chaos attractor, multiple stable point
The signal of generation, under initial value and the collective effect of disturbance, system mode is dissipated and is restrained along each balance vertex neighborhood, produces tool
Have never repeat, ultra wide band, aperiodic stationary state signal.Since the signal has infinite state machine, while having again and knowing
Randomness, therefore be named as the orderly cloud signal of finite state machine (Ordered Cloud Signal of Infinitive
State Machine).Referred to as orderly cloud signal (OCSISM), is international pioneering signal form, from project team in information
The research of safety and confrontation field, is applied successfully.
Orderly cloud signal has the unique correlation of time domain property nested with frequency domain, therefore can carry out double points of time domain and frequency domain
Solution is realized and is decomposed to detection target chromatography and spatial domain, realizes high resolution observations.
Meanwhile the capacity of decomposition of two dimensions of time and frequency zone is also very advantageous in the interference for offseting clutter, therefore in
The echo signal that clutter floods provides higher detection sensitivity.
In addition, orderly cloud signal removes cross correlation with excellent, can eliminate coherence because having finite state machine
Interference.
Orderly cloud signal has inherent rule in form with presentation in statistical property close to the characteristic of noise
Property, it convenient for control and grasps, while having superior spread spectrum nature, frequency response characteristic and correlation special than pseudo-random signal again
Property, therefore, the research and development of systems technology will exert far reaching influence in electronic information field, and industrial application will promote multiple high
The innovation of technology industry important technical, creates huge economic benefit and social benefit.
Summary of the invention
It is an object of the invention to solve, the noise jamming that the prior art encounters in superficial Layer Detection is strong, is difficult to eliminate
The problems such as clutter, imaging space resolution limitations, to achieve the above object, the present invention, propose a kind of computed tomography scanning imager, adopt
With the orderly cloud signal generator of finite state machine, the orderly cloud signal generator of finite state machine is used to generate two-way orderly
Cloud signal: the orderly cloud signal of the first branch and the orderly cloud signal of second branch, the orderly cloud signal of second branch is that the first branch has
The copy signal of sequence cloud signal, the scanning imaging instrument further include: radiofrequency emitting module 2, switch combination module 3, receiving module
With correlation interference imaging module 8；
The radiofrequency emitting module 2 has the first branch for receiving the orderly cloud signal of the first branch
Sequence cloud signal is converted into radio frequency and launches；
The switch combination module 3, for controlling and receiving the working sequence of module, and by the orderly cloud of the second branch
Signal is exported to receiving module；
The receiving module is used to carry out the second branch orderly cloud signal delay and gain process, and treated believes
Number, output to correlation interference imaging module 8；
The correlation interference imaging module 8 is used for the orderly cloud signal of second branch after delay and gain process
AD transformation, clutter cancellation and correlation interference processing are carried out, the tomography to detection target is completed.
As a kind of improvement of device of the present invention, the radiofrequency emitting module module 2 includes: radiofrequency launcher 21
With transmitting antenna 22, the radiofrequency launcher 21 receives the orderly cloud signal of the first branch, converts it to radio frequency and amplify,
It exports to transmitting antenna 22；The radiofrequency signal received is radiate by the transmitting antenna 22.As device of the present invention
A kind of improvement, the switch combination module 3 includes: first switch 31 and second switch 32；The first switch 31 and
The orderly cloud signal of two 32 pairs of switch second branchs carries out switch control, and the signal after will turn on respectively is exported to receiving module, into
And control and receive module working sequence.
As a kind of improvement of device of the present invention, the receiving module includes the first variable function generator 5, and first
Receiving unit 4, the second variable function generator 7 and the second receiving unit 6；
First variable function generator 5, the orderly cloud signal of second branch for exporting first switch 31 carry out
Delay and gain process, treated signal, output to the first receiving unit 4；
First receiving unit 4 is used to carry out clutter elimination to the signal received, and outputs signal to correlation interference
Imaging module 8；
The orderly cloud signal of the second branch that second variable function generator 7 exports second switch 32 carries out
Delay and gain process, treated signal, output to second receiving unit 6；
The signal that second receiving unit 6 will receive carries out clutter elimination, outputs signal to correlation interference
Imaging module 8.
As a kind of improvement of device of the present invention, first variable function generator 5 includes: first function hair
Raw device 51, the first variable delay 52 and the first variable attenuator 53；The first function generator 51 and first switch 31, phase
Interference imaging processing module 8 is closed to connect；
The orderly cloud of second branch that the first function generator 51 is sent after connecting the reception first switch 31 is believed
Number and the clutter cancellation sent of correlation interference imaging module 8 as a result, being converted, so that generating has certain Function feature
Orderly cloud signal, output is to the first variable delay 52；
First variable delay 52 by it is described have the orderly cloud signal of certain Function feature be delayed after export to
First variable attenuator 53；
The time delayed signal is carried out gain adjustment by first variable attenuator 53, and is exported to described first and connect
Receive unit 4.
As a kind of improvement of device of the present invention, first receiving unit 4 include: the first receiving antenna 41,
First variable-gain differential amplifier 42 and the first amplifilter 43；First variable-gain differential amplifier 42 includes in-phase end
And reverse side；In-phase end is connect with the first variable attenuator 53；
First receiving antenna 41 is exported for collecting echo-signal to the first variable-gain differential amplifier 42
Reverse side；
First variable-gain differential amplifier 42, for being carried out to the two paths of differential signals of in-phase end and reverse side
Linear operation, the signal that operation is obtained are exported to the first amplifilter 43；
First amplifilter 43 amplifies filtering, output to correlation interference imaging mould to received signal
Block 8.
As a kind of improvement of device of the present invention, second variable function generator 7 includes: second function hair
Raw device 71, the second variable delay 72 and the second variable attenuator 73；
The second function generator 71 is connect with second switch 32 and correlation interference imaging module 8；
The second function occurs 71 and does the orderly cloud signal of second branch sent after the connection of second switch 32 and correlation
The clutter cancellation that imaging module 8 is sent is related to as a result, being converted, so that generating, there is the orderly cloud of certain Function feature to believe
Number, output to the second variable delay 72；
Second variable delay 72 will have the orderly cloud signal of certain Function feature, export after being delayed to second
Variable attenuator 73；
The time delayed signal is carried out gain adjustment by second variable attenuator 73, and is exported to the receiving unit 6.
As a kind of improvement of device of the present invention, second receiving unit 6 include: the second receiving antenna 61,
Variable-gain differential amplifier 2 62 and the second amplifilter 63；The variable-gain differential amplifier 2 62 includes in-phase end
And reverse side；The in-phase end is connect with the second variable attenuator 73；
Second receiving antenna 61 collects echo-signal, and exports anti-to the second variable-gain differential amplifier 62
Xiang Duan；
To reverse side and in the same direction, end two paths of differential signals carries out linear operation to second variable-gain differential amplifier 62,
Operation result is exported to the second amplifilter 63；
The signal of 63 pairs of second amplifilter amplifies filtering, output to correlation interference imaging module 8.
As a kind of improvement of device of the present invention, the correlation interference imaging module 8 includes: first
ADC81, the 2nd ADC82, clutter cancellation 83, correlation interference processor 84, orientation imaging processor 85, distance are at imaging
Manage device 86 and tomography processor 87；
First ADC81, the signal for sending to the first amplifilter 43 carry out analog-to-digital conversion, output number
Signal is to clutter cancellation 83 and correlation interference processor 84；
The signal that 2nd ADC82 is used to send the second amplifilter 63 carries out analog-to-digital conversion, output number
Signal is to clutter cancellation 83 and correlation interference processor 84；
The digital signal that the clutter cancellation 83 is used to send the first ADC81 carries out clutter cancellation processing, will locate
Reason result is exported to first function generator 51, and clutter cancellation result is exported simultaneously to correlation interference processor 84；
It is also used to receive the digital signal that the 2nd ADC82 is sent, clutter cancellation processing is carried out respectively to digital signal, handle
As a result it exports to second function generator 71, clutter cancellation result is exported simultaneously to correlation interference processor 84；
The signal that the correlation interference processor 84 is sent for the first ADC81, the 2nd ADC82 and clutter cancellation 83 into
The processing of row correlation interference, and correlation interference processing result is respectively sent to orientation imaging processor 85, distance at imaging
Manage device 86 and tomography processor 87；
The orientation imaging processor 85, for carrying out orientation imaging to detection target；
The distance is to imaging processor 86, for carrying out distance to imaging to detection target；
The tomography processor 87, for carrying out tomography to detection target.
Present invention has an advantage that
1, there is clutter recognition characteristic, clutter can be rapidly offseted in target acquisition, highlights the echo from target
Signal；
2, there is ultra-broadband signal characteristic, high spatial resolution can be obtained；
3, there is coherent detection and interference imaging feature, be capable of providing the image of internal structure of high-resolution and high quality.
Detailed description of the invention
Fig. 1 is a kind of schematic block diagram of computed tomography scanning imager of the invention；
Fig. 2 is the structure chart of one of embodiment of the present invention computed tomography scanning imager.
Attached drawing mark
1, the orderly cloud signal generator 2 of finite state machine, radiofrequency emitting module
3, switch combination module 4, the first receiving unit
5, the first variable function generator 6, the second receiving unit
7, it can be changed second function and 8, correlation interference imaging module occur
21, radiofrequency launcher 22, transmitting antenna
31, first switch 32, second switch
41, the first receiving antenna 42, variable gain amplifier one
43, the first amplifilter
51, first function generator 52, the first variable delay
53, the first variable attenuator
61, the second receiving antenna 62, the second variable gain amplifier
63, the second amplifilter
71, the 72, second variable delay occurs for second function
73, the second variable attenuator
81, the first ADC 82, the 2nd ADC
83, clutter cancellation 84, correlation interference processor
85, orientation imaging processor 86, distance are to imaging processor
87, tomography processor
Specific embodiment
Tomographic scanner of the invention, due to using new signal system, natural clutter recognition characteristic makes
It obtains the clutter in target acquisition rapidly to offset, highlights the echo from target, the ultra wide band characteristic having has high
Spatial resolution can provide the image of internal structure of high-resolution and high quality by coherent detection and interference imaging.Orderly cloud
The time of signal unique correlation, the Time Continuous correlation being fundamentally different from the prior art, provides high-resolution layer
Analysis ability so that detection clutter is successively imaged and successively offseted as CT image, can to including underground pipe network variously
Lower treasure trove provides high-resolution and chromatographs image, detects reliable and stable.
The present invention will be described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, computed tomography scanning imager of the invention, which includes: the orderly cloud letter of finite state machine
Number generator 1, radiofrequency emitting module 2, switch combination module 3, the first receiving unit 4, the first variable function generator 5, second
Receiving unit 6, the second variable function generator 7, correlation interference imaging module 8.
First variable function generator 5, the first receiving unit 4, the second variable function generator 7 and second receive list
Member 6 constitutes receiving module；
The orderly cloud signal generator of the finite state machine is connect with radiofrequency emitting module and switch combination module, is generated
The orderly cloud signal of two branches, wherein the orderly cloud signal of the first branch is sent to radiofrequency emitting module；The orderly cloud of branch two letter
Number the first variable function generator and the second variable function generator are sent to by switch combination module；
The radiofrequency emitting module is connect with the orderly cloud signal generator of finite state machine, and it is orderly to receive finite state machine
The orderly cloud signal that cloud signal generator is sent, converts it to radio frequency and launches；
The switch combination module and the orderly cloud signal generator of finite state machine and the first variable function generator and
The connection of second variable function generator, controls the working sequence of two variable function generators, realizes that respective clutter eliminates function
Energy.
First receiving unit is connect with first function generator and correlation interference imaging module, receives first
The orderly cloud copy signal that variable function generator is sent is eliminated for clutter, and the first receiving unit outputs signal to related dry
Imaging module is related to, is handled for interference imaging；
First variable function generator is connect with switch combination module and the first receiving unit, orderly cloud signal warp
Switch combination module enters first function generator, and first function generator generates the orderly cloud pair of Variable delay and variable gain
This signal, output to the first receiving unit；
Second receiving unit is connect with the second variable function generator and correlation interference imaging module, is received
The orderly cloud copy signal that second variable function device is sent, is eliminated for clutter, and the second receiving unit outputs signal to phase
Interference imaging processing module is closed, is handled for interference imaging；
Second variable function generator is connect with switch combination module and the second receiving unit, orderly cloud signal warp
Switch combination module enters the second variable function generator, and the second variable function generator generates Variable delay and variable gain
Orderly cloud copy signal, output to the second receiving unit；
The correlation interference imaging module is connect with the first receiving unit and the second receiving unit, and first receives list
Member and the second receiving unit output signal to correlation interference imaging module, and correlation interference imaging module is used for two
The signal of receiving unit carries out AD transformation, clutter cancellation, relevant treatment, completes to chromatograph the high-resolution high quality of detection target
Imaging.
As shown in Fig. 2, for the structure chart of one of embodiment of the present invention computed tomography scanning imager.Wherein finite state machine
Orderly cloud signal generator 1 is used to generate the orderly cloud signal of the scanning imaging instrument.Wherein orderly cloud signal is sent to and penetrates all the way
Frequency transmitting module 2；Copy of the orderly cloud signal of another way as first branch signal is sent to by switch combination module 3
One variable function generator 5 and the second variable function generator 7 carry out linear operation with echo-signal, offset earth's surface and underground
Clutter.
The radiofrequency emitting module 2 includes: radiofrequency launcher 21 and transmitting antenna 22.Radiofrequency launcher 21 receives orderly
The orderly cloud signal that the input of cloud signal generator comes, converts it to radio frequency and amplifies, output to transmitting antenna 22；Transmitting antenna
22 radiate the radiofrequency signal that input comes.
The switch combination module 3 includes: first switch 31, second switch 32.First switch 31 and finite state machine
Orderly cloud generator 1 connects, and carries out switch control to the copy signal that the orderly cloud generator 1 of finite state machine is sent, will turn on
Signal afterwards is exported to first function generator 51；Second switch 32 is connect with the orderly cloud generator 1 of finite state machine, to unlimited
The copy signal that the orderly cloud generator 1 of state machine is sent carries out switch control, and the signal after will turn on is exported to second function and sent out
Raw device 71.
First variable function generator 5, the first receiving unit 4, the second variable function generator 7 and second receive list
Member 6 constitutes receiving module；
First receiving unit 4 includes: the first receiving antenna 41, the first variable-gain differential amplifier 42, first
Amplifilter 43.First receiving antenna 41 collects echo-signal, and exports to the first variable-gain differential amplifier
42, the in-phase end of the first variable-gain differential amplifier 42 is connect with the first variable attenuator 53 in variable function generator 5,
Reverse side is connect with the first receiving antenna 41, carries out linear operation, output result to the first amplification filtering to two paths of differential signals
Device 43；The signal that first amplifilter 43 carrys out the input of the first variable-gain differential amplifier 42 amplifies filtering, exports
To the first ADC81.
The first function generator 5 includes: that first function generator 51, the first variable delay 52, first are variable
Attenuator 53.First function generator 51 is connect with first switch 31, clutter cancellation 83, is received after first switch 31 is connected and is sent out
The orderly cloud copy signal come, the clutter cancellation sent according to clutter cancellation 83 meet certain Function feature as a result, generating
Orderly cloud signal, output to the first variable delay 52；First variable delay 52 receives what first function generator 51 was sent
Orderly cloud signal, exports after being delayed to the first variable attenuator 53；First variable attenuator 53 is by the first variable delay
52 time delayed signals sent carry out gain adjustment, and export to the non-inverting input terminal of variable gain amplifier 1.
Second receiving unit 6 includes: the second receiving antenna 61, the second variable-gain differential amplifier 62, second
Amplifilter 63.Second receiving antenna 61 collects echo-signal, and exports to the second variable-gain differential amplifier
62, the second variable attenuator 73 in the in-phase end of the second variable-gain differential amplifier 62 and the second variable function generator 7
Connection, reverse side are connect with the second receiving antenna 61, carry out linear operation, output result to the second amplification to two paths of differential signals
Filter 63；The signal that second amplifilter 63 carrys out the input of the second variable-gain differential amplifier 62 amplifies filtering,
It exports to the 2nd ADC82.
Second variable function generator 7 includes: second function the 71, second variable delay 72, second of generation can
Become attenuator 73.Second function occurs 71 and connect with second switch 32, clutter cancellation 83, receives after second switch 32 is connected and sends out
The orderly cloud copy signal come, the clutter cancellation sent according to clutter cancellation 83 meet certain Function feature as a result, generating
Orderly cloud signal, output to the second variable delay 72；What the second variable delay 72 reception second function generation 71 was sent has
Sequence cloud signal exports after being delayed to the second variable attenuator 73；Second variable attenuator 73 is by the second variable delay 72
The time delayed signal sent carries out gain adjustment, and exports to the non-inverting input terminal of the second variable gain amplifier 62.
The correlation interference imaging module 8 includes: the first ADC81, the 2nd ADC82, clutter cancellation 83, correlation
Interfere processor 84, orientation imaging processor 85, distance to imaging processor 86, tomography processor 87.Described
One ADC81 is connect with the first amplifilter 43, carries out analog-to-digital conversion to the analog signal that the first amplifilter 43 is sent, defeated
Digital signal is to clutter cancellation 83 and correlation interference processor 84 out；2nd ADC82 and the second amplifilter 63
Connection carries out analog-to-digital conversion, output digit signals to clutter cancellation 83 to the analog signal that the second amplifilter 63 is sent
With correlation interference processor 84；The clutter cancellation 83 and the first ADC81, the 2nd ADC82, first function generator 51,
71 and the connection of correlation interference processor 84 occur for second function, and clutter cancellation 83 receives the first ADC 81 and the 2nd ADC82 hair
The digital signal come, carries out clutter cancellation processing to the signal of two receiving units, processing result is exported respectively to first respectively
The second function generator 71 in first function generator 51 and the second variable function generator 7 in variable function generator 5,
For the output signal of control function generator, clutter cancellation result is exported simultaneously to correlation interference processor 84, for three-dimensional
The imaging in direction；The orientation imaging processor 85 is connect with correlation interference processor 84, is received at correlation interference
The associated processing outcomes that reason device 84 is sent carry out orientation imaging to detection target；The distance to imaging processor 86 with
Correlation interference processor 84 connects, and receives the associated processing outcomes sent of correlation interference processor 84, to detection target carry out away from
Descriscent imaging；The tomography processor 87 is connect with correlation interference processor 84, is received correlation interference processor 84 and is sent out
The associated processing outcomes come carry out tomography to detection target.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (9)
1. a kind of computed tomography scanning imager, including the orderly cloud signal generator of finite state machine, the orderly cloud of finite state machine
Signal generator is for generating the orderly cloud signal of two-way: the orderly cloud signal of the first branch and the orderly cloud signal of second branch, and second
The orderly cloud signal of branch is the copy signal of the orderly cloud signal of the first branch, which is characterized in that the scanning imaging instrument further include:
Radiofrequency emitting module (2), switch combination module (3), receiving module and correlation interference imaging module (8)；
The radiofrequency emitting module (2), for receiving the orderly cloud signal of the first branch, and the first branch is orderly
Cloud signal is converted into radio frequency and launches；
The switch combination module (3) is believed for controlling and receiving the working sequence of module, and by the orderly cloud of the second branch
Number output is to receiving module；
The receiving module is used to carry out the second branch orderly cloud signal delay and gain process, treated signal,
It exports to correlation interference imaging module (8)；
The correlation interference imaging module (8) be used for the orderly cloud signal of second branch after delay and gain process into
Row AD transformation, clutter cancellation and correlation interference processing, complete the tomography to detection target.
2. computed tomography scanning imager according to claim 1, which is characterized in that the radiofrequency emitting module module (2)
It include: radiofrequency launcher (21) and transmitting antenna (22), the radiofrequency launcher (21) receives the orderly cloud letter of the first branch
Number, it converts it to radio frequency and amplifies, output to transmitting antenna (22)；The radiofrequency signal that the transmitting antenna (22) will receive
It radiate.
3. computed tomography scanning imager according to claim 2, which is characterized in that the switch combination module (3) includes:
First switch (31) and second switch (32)；The first switch (31) and second switch (32) are to the orderly cloud signal of second branch
Switch control is carried out, the signal after will turn on respectively is exported to receiving module, and then controls and receives module working sequence.
4. computed tomography scanning imager according to claim 3, which is characterized in that the receiving module includes the first variable letter
Number generator (5), the first receiving unit (4), the second variable function generator (7) and the second receiving unit (6)；
First variable function generator (5), the orderly cloud signal of second branch for exporting first switch (31) carry out
Delay and gain process, treated signal, output to the first receiving unit (4)；
First receiving unit (4) is used to carry out clutter elimination to the signal that receives, and output signal to correlation interference at
As processing module (8)；
The orderly cloud signal of the second branch that second variable function generator (7) exports second switch (32) carries out
Delay and gain process, treated signal, output to second receiving unit (6)；
The signal that second receiving unit (6) will receive, carry out clutter elimination, output signal to correlation interference at
As processing module (8).
5. computed tomography scanning imager according to claim 4, which is characterized in that first variable function generator
It (5) include: first function generator (51), the first variable delay (52) and the first variable attenuator (53)；First letter
Number generator (51) is connect with first switch (31), correlation interference imaging module (8)；
The orderly cloud of second branch that the first function generator (51) is sent after connecting reception first switch (31) is believed
Number and the clutter cancellation sent of correlation interference imaging module (8) as a result, being converted, so that generating has certain function special
The orderly cloud signal of sign, output to the first variable delay (52)；
First variable delay (52) by it is described there is the orderly cloud signal of certain Function feature to be delayed after output to the
One variable attenuator (53)；
The time delayed signal is carried out gain adjustment by first variable attenuator (53), and is exported to described first and received
Unit (4).
6. computed tomography scanning imager according to claim 5, which is characterized in that first receiving unit (4) includes:
First receiving antenna (41), the first variable-gain differential amplifier (42) and the first amplifilter (43)；First variable gain
Difference amplifier (42) includes in-phase end and reverse side；In-phase end is connect with the first variable attenuator (53)；
First receiving antenna (41) is exported for collecting echo-signal to the first variable-gain differential amplifier (42)
Reverse side；
First variable-gain differential amplifier (42), for carrying out line to the two paths of differential signals of in-phase end and reverse side
Property operation, the signal that operation is obtained are exported to the first amplifilter (43)；
First amplifilter (43) amplifies filtering, output to correlation interference imaging module to received signal
(8)。
7. computed tomography scanning imager according to claim 6, which is characterized in that second variable function generator
It (7) include: second function generator (71), the second variable delay (72) and the second variable attenuator (73)；
The second function generator (71) connect with second switch (32) and correlation interference imaging module (8)；
The orderly cloud signal of second branch sent after (71) connect second switch (32) occurs for the second function and correlation is dry
The clutter cancellation that imaging module (8) is sent is related to as a result, being converted, to generate the orderly cloud with certain Function feature
Signal, output to the second variable delay (72)；
Second variable delay (72) will have the orderly cloud signal of certain Function feature, and exporting after being delayed can to second
Become attenuator (73)；
The time delayed signal is carried out gain adjustment by second variable attenuator (73), and is exported to the receiving unit (6).
8. computed tomography scanning imager according to claim 7, which is characterized in that second receiving unit (6) includes:
Second receiving antenna (61), variable-gain differential amplifier two (62) and the second amplifilter (63)；The variable gain is poor
Dividing amplifier two (62) includes in-phase end and reverse side；The in-phase end is connect with the second variable attenuator (73)；
Second receiving antenna (61) collects echo-signal, and exports anti-to the second variable-gain differential amplifier (62)
Xiang Duan；
To reverse side and in the same direction, end two paths of differential signals carries out linear operation, fortune to second variable-gain differential amplifier (62)
Result is calculated to export to the second amplifilter (63)；
The signal of second amplifilter (63) pair amplifies filtering, output to correlation interference imaging module (8).
9. computed tomography scanning imager according to claim 8, which is characterized in that the correlation interference imaging module
It (8) include: the first ADC (81), the 2nd ADC (82), clutter cancellation (83), correlation interference processor (84), orientation imaging
Processor (85), distance are to imaging processor (86) and tomography processor (87)；
First ADC (81), the signal for sending to the first amplifilter (43) carry out analog-to-digital conversion, output number
Signal is to clutter cancellation (83) and correlation interference processor (84)；
The signal that 2nd ADC (82) is used to send the second amplifilter (63) carries out analog-to-digital conversion, output number
Signal is to clutter cancellation (83) and correlation interference processor (84)；
The digital signal that the clutter cancellation (83) is used to send the first ADC (81) carries out clutter cancellation processing, will locate
Reason result is exported to first function generator (51), and clutter cancellation result is exported simultaneously to correlation interference processor (84)；
It is also used to receive the digital signal that the 2nd ADC (82) is sent, clutter cancellation processing, processing knot is carried out respectively to digital signal
Fruit exports to second function generator (71), and clutter cancellation result is exported simultaneously to correlation interference processor (84)；
The letter that the correlation interference processor (84) sends for the first ADC (81), the 2nd ADC (82) and clutter cancellation (83)
Number carry out correlation interference processing, and by correlation interference processing result be respectively sent to orientation imaging processor (85), distance to
Imaging processor (86) and tomography processor (87)；
The orientation imaging processor (85), for carrying out orientation imaging to detection target；
The distance is to imaging processor (86), for carrying out distance to imaging to detection target；
The tomography processor (87), for carrying out tomography to detection target.
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