CN108051867B - A kind of anti-interference millimeter wave detector of binary channels - Google Patents
A kind of anti-interference millimeter wave detector of binary channels Download PDFInfo
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- CN108051867B CN108051867B CN201711148450.5A CN201711148450A CN108051867B CN 108051867 B CN108051867 B CN 108051867B CN 201711148450 A CN201711148450 A CN 201711148450A CN 108051867 B CN108051867 B CN 108051867B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/005—Prospecting or detecting by optical means operating with millimetre waves, e.g. measuring the black losey radiation
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Abstract
The invention proposes a kind of anti-interference millimeter wave detectors of binary channels, it is characterized in that, including millimeter wave channel element, power splitter, exchange low noise amplification channel, direct current low noise amplification channel, detection module, target identification circuit, local oscillator module, detection module analyzes and determines the direct current signal of forward direction amplification, when wave character is consistent with interference signal feature, detection module does not export the signal of identification to one, target identification circuit, and changes the voltage for being input to local oscillator module；When target identification circuit does not receive the signal for not exporting identification, the amplitude and width of high pulse signal in amplified AC signal is analyzed, and the signal received and identification library are compared, export final identification signal.The anti-interference millimeter wave detector of binary channels of the invention increases direct current channel module compared to traditional millimeter wave detector, can effectively exclude influence of the active interference to millimeter wave detector.
Description
Technical field
The present invention relates to target acquisition field, especially a kind of anti-interference millimeter wave detector of binary channels.
Background technique
Millimeter wave detector is the device for detecting armored target on battlefield, and millimeter wave is located at microwave band and infrared waves
Section is intermediate, and wavelength is 1mm to 10mm, and frequency is from 300GHz to 30GHz.At present using tank as main representative on modern battlefield
Various armored target is occupying increasingly consequence, and starts leading Battlefield.Such armored target is implemented accurate
Effective strike becomes the main direction of development of current ammunition weapon, and at the same time, various perturbation techniques are also flourishing, this
It also implies that and battlefield requirement is then unable to satisfy using traditional millimeter wave detector.
Traditional millimeter wave detector only includes communication channel module, and identification signal can be provided when detecting target, however
When active interference effect is to the detector, which can provide identification signal, and the millimeter wave detector made is to mesh
Target recognition capability substantially reduces, and causes it that can not effectively identify to armored target.
Summary of the invention
The invention proposes a kind of anti-interference millimeter wave detectors of binary channels.
Realize technical solution of the invention are as follows: a kind of anti-interference millimeter wave detector of binary channels, including millimeter wave letter
Road component, power splitter, exchange low noise amplification channel, direct current low noise amplification channel, detection module, target identification circuit, sheet
Vibration module, in which:
The local oscillation signal that millimeter wave channel element receives millimeter-wave signal and the output of local oscillator module from measured piece carries out
Mixing, and after enhanced processing after output to power splitter；
Power splitter will treated that millimeter-wave signal is divided into two-way millimeter-wave signal through millimeter wave channel element, all the way millimeter
Wave signal is input to exchange low noise amplification channel, and another way millimeter-wave signal is input to direct current low noise amplification channel；
Direct current low noise amplification channel retains the direct current signal in millimeter-wave signal and inputs after being carried out positive amplification
Detection module；
Exchange low noise amplification channel retains the AC signal in millimeter-wave signal and inputs after being carried out positive amplification
Target identification circuit；
Detection module analyzes and determines the direct current signal of forward direction amplification, when wave character is consistent with interference signal feature
When, detection module does not export the signal of identification to one, target identification circuit, changes simultaneously the voltage for being input to local oscillator module；
When target identification circuit does not receive the signal for not exporting identification, analyzes high impulse in amplified AC signal and believe
Number amplitude and width and by its with identification library compare, export final identification signal.
Preferably, millimeter wave channel element includes sequentially connected antenna, frequency mixer, intermediate frequency amplifier, square law detection
Device, low-noise amplifier.
Preferably, detection module includes input module, output module, STM32 processing and control module and download module, direct current
The direct current signal of low noise amplification channel output is input to STM32 processing and control module, STM32 processing control mould through input module
Root tuber is it is judged that result exports corresponding signal to VCO amplifying circuit and target identification circuit, the downloading mould from output module
Block is used to load control program to STM32 processing and control module.
Preferably, direct current low noise amplification channel includes sequentially connected low noise amplification chip AD8599 and bandwidth amplification
The input terminal of device OP484, the low noise amplification chip AD8599 and the output end of power splitter connect, the bandwidth amplifier
The input terminal of OP484 connect output end and the detection of bandwidth amplifier OP484 with the output end of low noise amplification chip AD8599
The input terminal of module connects.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) the anti-interference millimeter wave detector of binary channels of the invention
Direct current channel module is increased compared to traditional millimeter wave detector, can effectively exclude active interference to millimeter wave detector
It influences；2) the anti-interference millimeter wave detector of binary channels of the invention compares traditional millimeter wave detector to the discrimination of armored target
It is higher, it can effectively find armored target and implement to hit；3) present invention selects low-power chip, substantially reduces function of the invention
Consumption, adequately achieves the design concept of low-power consumption.
Further detailed description is done to the present invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is a kind of system global structure block diagram of the anti-interference millimeter wave detector of binary channels of the present invention.
Fig. 2 is direct current low noise amplification channel circuit schematic diagram of the present invention.
Fig. 3 is the work flow diagram of detection module of the present invention and VCO amplifying circuit.
Fig. 4 is the structure chart of detection module of the present invention.
Fig. 5 is the circuit diagram of detection module of the present invention.
When Fig. 6 detects armored target for a kind of anti-interference millimeter wave detector of binary channels of the present invention in direct current channel module
Signal waveform.
When Fig. 7 detects active interference for a kind of anti-interference millimeter wave detector of binary channels of the present invention in direct current channel module
Signal waveform.
Specific embodiment
A kind of anti-interference millimeter wave detector of binary channels, including millimeter wave channel element, power splitter, exchange low noise amplification
Channel, direct current low noise amplification channel, detection module, target identification circuit, local oscillator module, in which:
The local oscillation signal that millimeter wave channel element receives millimeter-wave signal and the output of local oscillator module from measured piece carries out
Mixing, and after enhanced processing after output to power splitter；
Power splitter will treated that millimeter-wave signal is divided into two-way millimeter-wave signal through millimeter wave channel element, all the way millimeter
Wave signal is input to exchange low noise amplification channel, and another way millimeter-wave signal is input to direct current low noise amplification channel；
Direct current low noise amplification channel retains the direct current signal in millimeter-wave signal and inputs after being carried out positive amplification
Detection module；
Exchange low noise amplification channel retains the AC signal in millimeter-wave signal and inputs after being carried out positive amplification
Target identification circuit；
Detection module analyzes and determines the direct current signal of forward direction amplification, when wave character is consistent with interference signal feature
When, detection module does not export the signal of identification to one, target identification circuit, changes simultaneously the voltage for being input to local oscillator module；
When target identification circuit does not receive the signal for not exporting identification, analyzes high impulse in amplified AC signal and believe
Number amplitude and width and by its with identification library compare, export final identification signal.
In further embodiment, millimeter wave channel element include sequentially connected antenna, frequency mixer, intermediate frequency amplifier,
Square law wave detector, low-noise amplifier.
In further embodiment, detection module include input module, output module, STM32 processing and control module and under
Module is carried, the direct current signal of direct current low noise amplification channel output is input to STM32 processing and control module through input module,
STM32 processing and control module exports corresponding signal to VCO amplifying circuit and target identification from output module according to judging result
Circuit, the download module are used to load control program to STM32 processing and control module.
In further embodiment, direct current low noise amplification channel includes sequentially connected low noise amplification chip AD8599
With bandwidth amplifier OP484, the input terminal of the low noise amplification chip AD8599 and the output end of power splitter are connected, the band
The input terminal of wide amplifier OP484 connect the output of bandwidth amplifier OP484 with the output end of low noise amplification chip AD8599
End is connect with the input terminal of detection module.
As shown in connection with fig. 2, the anti-interference millimeter wave detector direct current low noise amplification channel of binary channels of the invention includes low
The second level output port of noise amplification chip AD8599 and bandwidth amplifier OP484, low noise amplification chip AD8599 are linked into
The input terminal of bandwidth amplifier OP484.The signal of power splitter output carries out two-stage amplification by low noise amplification chip AD8599
After export and give bandwidth amplifier OP484, which is filtered and amplifies using bandwidth amplifier OP484, amplifies through bandwidth
Device OP484 filtering and the output of amplified signal enter detection module.
The output end of power splitter is connect with the second pin-INA of low noise amplification chip AD8599, the output end of power splitter
Simultaneously with second resistance R5One end connection, second resistance R5The other end and low noise amplification chip AD8599 second pin-
INA connection, second resistance R5The other end simultaneously with first resistor R1One end connection, first resistor R1The other end simultaneously with
The first pin outA connection of low noise amplification chip AD8599, the first pin outA of low noise amplification chip AD8599 is simultaneously
For level-one output port out1, the third pin+INA and 3rd resistor R of low noise amplification chip AD859922One end connection,
3rd resistor R22Other end ground connection, the 4th pin-V of low noise amplification chip AD8599 connect with -5V power supply, and low noise is put
The 4th pin-V of large chip AD8599 is connect with one end of first capacitor C1, the second capacitor C2 simultaneously, first capacitor C1, second
The other end of capacitor C2 is grounded；The 8th pin+V of low noise amplification chip AD8599 is connect with+5V power supply, while passing through the
Three capacitor E14, the 4th capacitor C25, the 5th capacitor C15 are connected to ground, the 7th pin-outB of low noise amplification chip AD8599
It is connect with one end of the 6th capacitor E22, the other end of the 6th capacitor E22 is level-one output port out1, low noise amplification chip
The 7th pin-outB of AD8599 simultaneously with the 4th resistance R4One end connection, the 4th resistance R4The other end and low noise amplification
The 6th pin-INB connection of chip AD8599, the 4th resistance R4The other end simultaneously with the 5th resistance R7One end connection, the 5th
Resistance R7The other end be low noise amplification chip AD8599 second level output port out2, low noise amplification chip AD8599's
5th pin+INB is connected to ground by the 6th resistance R8.
As shown in connection with fig. 3, the detection module of the anti-interference millimeter wave detector of binary channels of the invention is micro- using STM32 series
Controller, detection module export primary voltage, export two different voltage values of 4.7V and 7V extremely after the amplification of VCO amplifying circuit
Local oscillator module exports two fixed local frequency 32.4GHz and 34.4Gz, two local frequency intervals by local oscillator module
2GHz.Microcontroller carries out A/D acquisition to the signal that direct current low noise amplification channel exports, and it is defeated to judge to carry out glide filter
Whether the amplitude and width of the signal entered are consistent with interference signal feature, when inconsistent with interference signal feature, again to defeated
Enter signal and carries out A/D acquisition and judgement；When input signal is consistent with interference signal feature, then change output voltage passes through VCO
Amplifying circuit amplifies output, so that the frequency of local oscillator changes, while giving target identification circuit sending signal, so that mesh
Mark identification circuit does not export identification signal.
In active interference effect, direct current channel is input to after intermediate frequency amplifier amplification and square law detector
In signal retain direct current signal, amplify by forward direction, the variation tendency of waveform is high impulse, this is mainly by " heat " of decoy
Target property causes, and the A/D module through the STM32 microcontroller on detection module is acquired signal, analyzes and determines, waveform
Feature is consistent with interference signal feature, and can determine whether to detect is active decoy, and detection module passes through control VCO amplifying circuit
Another voltage value is exported, the local oscillator made changes, since detector bandwidth is 50MHz~550MHz, active interference signal
It will effectively be filtered out；When detecting armored target, signal intensity trend is low pulse in direct current channel module, and output is not
It is impacted；Communication channel module then exports identification signal, shows to detect target.
In conjunction with Fig. 4 and Fig. 5, the detection module of the anti-interference millimeter wave detector of binary channels of the invention of the invention mainly by
Input module, output module, STM32 processing and control module, download module and power module composition.
In conjunction with Fig. 6, when arriving true armored target of the anti-interference millimeter wave detector scanning of binary channels of the invention, signal
After intermediate frequency amplifier and square law wave detector, enter direct current channel module all the way, since " cold " target of armored target is special
Property and circuit positive amplification, input signal by AD8599 low-noise amplifier amplify 200 times after using OP484 into
The filtered signal of row is the low pulse signal comprising direct current, is exported unaffected；The identification electricity of another way communication channel module
Then normally judgement output identification signal, this increased direct current channel module of design will not generate shadow to the detection of real goal on road
It rings.
In conjunction with Fig. 7, when the decoy for arriving active interference of binary channels of the invention anti-interference millimeter wave detector scanning, believe
Number after intermediate frequency amplifier and square law wave detector, enter direct current channel module all the way, due to " heat " target of decoy
Characteristic makes the variation tendency of the signal in direct current channel module be high impulse, and wave character is consistent with interference signal feature, sentences
The target of disconnected scanning is active decoy, exports different voltage values by controlling VCO amplifying circuit, passes through VCO and frequency multiplier
Four times of frequencys multiplication change the local frequency of front ends of millimeter waves, while giving one signal of identification circuit module, make identification circuit module not
Export identification signal.
To which the anti-interference millimeter wave detector of binary channels disclosed by the invention can effectively exclude active interference to millimeter wave
The influence of detector, it is effective to find armored target and implement to hit.
It is described in more detail below with reference to embodiment.
Embodiment 1
Voltage accesses VCO (voltage controlled oscillator), and its output frequency is 8.1GHz, 8.6GHz afterwards, by four times of frequencys multiplication of frequency multiplier
Output local frequency is respectively 32.4GHz, 34.4GHz respectively afterwards.When local oscillator module local frequency takes 32.4GHz, bandwidth range
For 31.9GHz~32.9GHz active interference effect when millimeter wave detector, identification circuit judges mesh in communication channel module
It is designated as real goal, signal intensity trend is high impulse in direct current channel module, and wave character is consistent with interference signal feature；It visits
It surveys device judgement and detects active decoy, control VCO amplifying circuit exports different voltage values, passes through VCO and four times of frequency multiplier
It is 34.4GHz that frequency multiplication, which exports local oscillator, while giving one signal of identification circuit, and identification circuit is made not export identification signal, due to visiting
The bandwidth range for surveying device is 50MHz~550MHz, and detectable range of target frequencies is 33.9GHz~34.9GHz, and
The active interference of 31.9GHz~32.9GHz is filtered out, this can effectively exclude active interference, realizes anti-jamming effectiveness.
Claims (5)
1. a kind of anti-interference millimeter wave detector of binary channels, which is characterized in that including millimeter wave channel element, power splitter, exchange
Low noise amplification channel, direct current low noise amplification channel, detection module, target identification circuit, local oscillator module, in which:
The local oscillation signal that the millimeter wave channel element receives millimeter-wave signal and the output of local oscillator module from measured piece carries out
Mixing, and export after enhanced processing to power splitter；
The power splitter will treated that millimeter-wave signal is divided into two-way millimeter-wave signal through millimeter wave channel element, all the way millimeter
Wave signal is input to exchange low noise amplification channel, and another way millimeter-wave signal is input to direct current low noise amplification channel；
Direct current low noise amplification channel retains the direct current signal in millimeter-wave signal and inputs after being carried out positive amplification
Detection module；
The exchange low noise amplification channel retains the AC signal in millimeter-wave signal and inputs after being carried out positive amplification
Target identification circuit；
The detection module analyzes and determines the direct current signal of forward direction amplification, when wave character is consistent with interference signal feature
When, detection module does not export the signal of identification to one, target identification circuit, changes simultaneously the voltage for being input to local oscillator module；
When the target identification circuit does not receive the signal for not exporting identification, analyzes high impulse in amplified AC signal and believe
Number amplitude and width and by its with identification library compare, export final identification signal.
2. the anti-interference millimeter wave detector of binary channels according to claim 1, which is characterized in that the millimeter wave channel group
Part includes sequentially connected antenna, frequency mixer, intermediate frequency amplifier, square law wave detector, low-noise amplifier.
3. the anti-interference millimeter wave detector of binary channels according to claim 1, which is characterized in that the detection module includes
Input module, output module, STM32 processing and control module and download module, the direct current letter of direct current low noise amplification channel output
Number it is input to STM32 processing and control module through input module, STM32 processing and control module is defeated from output module according to judging result
Corresponding signal is to VCO amplifying circuit and target identification circuit out, and the download module to STM32 processing and control module for adding
Carry control program.
4. the anti-interference millimeter wave detector of binary channels according to claim 1, which is characterized in that the direct current low noise is put
Big channel includes sequentially connected low noise amplification chip AD8599 and bandwidth amplifier OP484, the low noise amplification chip
The input terminal of AD8599 and the output end of power splitter connect, the input terminal and low noise amplification core of the bandwidth amplifier OP484
The output end of piece AD8599 connects, and the output end of bandwidth amplifier OP484 and the input terminal of detection module connect.
5. the anti-interference millimeter wave detector of binary channels according to claim 4, which is characterized in that the low noise amplification core
The second pin (- INA) of piece AD8599 is connect with the output end of power splitter, the output end of power splitter simultaneously with second resistance (R5)
One end connection, second resistance (R5) the other end connect with the second pin (- INA) of low noise amplification chip AD8599,
Two resistance (R5) the other end simultaneously with first resistor (R1) one end connection, first resistor (R1) the other end simultaneously and low noise
The first pin (outA) of sound amplification chip AD8599 connects, and the first pin (outA) of low noise amplification chip AD8599 is simultaneously
For level-one output port (out1), the third pin (+INA) and 3rd resistor (R of low noise amplification chip AD859922) one end
Connection, 3rd resistor (R22) other end ground connection, the 4th pin (- V) of low noise amplification chip AD8599 and -5V power supply connect
Connect, the 4th pin (- V) of low noise amplification chip AD8599 simultaneously respectively with first capacitor (C1), the second capacitor (C2)
One end connection, the other end ground connection of first capacitor (C1), the second capacitor (C2)；The 8th pin of low noise amplification chip AD8599
(+V) is connect with+5V power supply, while being connected to ground by third capacitor (E14), the 4th capacitor (C25), the 5th capacitor (C15),
The 7th pin (- outB) of low noise amplification chip AD8599 is connect with one end of the 6th capacitor (E22), the 6th capacitor (E22)
The other end be level-one output port (out1), the 7th pin (- outB) of low noise amplification chip AD8599 is simultaneously with the 4th
Resistance (R4) one end connection, the 4th resistance (R4) the other end and low noise amplification chip AD8599 the 6th pin (- INB)
Connection, the 4th resistance (R4) the other end simultaneously with the 5th resistance (R7) one end connection, the 5th resistance (R7) the other end be it is low
5th pin (+INB) of the second level output port (out2) of noise amplification chip AD8599, low noise amplification chip AD8599 is logical
The 6th resistance (R8) is crossed to be connected to ground.
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| US5239271A (en) * | 1991-11-01 | 1993-08-24 | Ben Efraim Gideon | Microwave synthesizer |
| CN104931816A (en) * | 2015-05-31 | 2015-09-23 | 南京理工大学 | Fiber fabric millimeter wave radiation characteristic measuring device and measuring method |
| CN107015204A (en) * | 2017-01-10 | 2017-08-04 | 成都旋极星源信息技术有限公司 | A kind of transmitting chip for millimeter wave Vehicular radar system |
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