CN109274370A - Sweep Source and UAV system for millimetre-wave radar - Google Patents
Sweep Source and UAV system for millimetre-wave radar Download PDFInfo
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- CN109274370A CN109274370A CN201811147634.4A CN201811147634A CN109274370A CN 109274370 A CN109274370 A CN 109274370A CN 201811147634 A CN201811147634 A CN 201811147634A CN 109274370 A CN109274370 A CN 109274370A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/20—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a harmonic phase-locked loop, i.e. a loop which can be locked to one of a number of harmonically related frequencies applied to it
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of Sweep Sources and UAV system for millimetre-wave radar, the output end of crystal oscillator in the Sweep Source and the input terminal of phaselocked loop connect, the output end of phaselocked loop is connect with the input terminal of frequency multiplier, first filter and DDS respectively, the output end of frequency multiplier and the input terminal of second filter connect, and the output end of first filter and DDS are connect with the input terminal of the first frequency mixer；The output end of first frequency mixer is connect with the input terminal of third filter, and the output end of third filter is connect with the input terminal of the first power amplifier；The output end of second filter and the first power amplifier is connect with the input terminal of the second frequency mixer, the output end of second frequency mixer is connect with the input terminal of the second power amplifier, the output end of second power amplifier is connect with the input terminal of the 4th filter, and the output end of the 4th filter exports the millimeter wave local oscillation signal used for millimetre-wave radar；So that performance indicator needed for the Sweep Source can be met using a phaselocked loop.
Description
Technical field
The present invention relates to swept source techniques field, in particular to a kind of Sweep Source and unmanned plane system for millimetre-wave radar
System.
Background technique
Direct digital synthesis technique (Direct Digital Synthesizer, DDS) technology is in communication, radar, electronics
It is widely applied in confrontation and other electronic systems, with the development of digital integrated electronic circuit and microelectric technique, DDS technology
Be gradually increased, fully demonstrate its relative bandwidth is very wide, frequency switching time is extremely short, frequency resolution is very high, output phase connect
Continuous, exportable wideband orthogonal signal, programmable and totally digitilized structure are convenient for the superior functions such as integrated.
Flexibly due to DDS configuration, frequency linearity is good, and current radar FM signal is usually generated by DDS.Since DDS is defeated
Frequency is lower (2GHz or less) out, spuious more in high-frequency output frequency, therefore usually allows DDS work compared with low frequency
Section inhibits image frequency and distal end spuious, finally upconverts to working frequency range by double conversion mode.But in this case altogether
Three local oscillators are needed, as shown in Figure 1, Fig. 1 is a kind of structure composition schematic diagram of embodiment of existing Sweep Source；Fig. 1 institute
The scheme shown uses three local oscillators, i.e. phaselocked loop 1 is first time frequency conversion local oscillator, and phaselocked loop 2 is second of frequency conversion local oscillator, locking phase
Ring 3 is DDS input sample frequency；Therefore big using the corresponding circuit area of this scheme of Fig. 1, for millimeter wave and low, small, slow
For the use of radar, the circuit of this larger area is obviously improper.
Summary of the invention
The present invention provides a kind of Sweep Source and UAV system for millimetre-wave radar, to be using a phaselocked loop
Performance indicator needed for Sweep Source can be achieved reduces circuit area.
The present invention provides a kind of Sweep Source for millimetre-wave radar, the Sweep Source packet for millimetre-wave radar
Include: crystal oscillator, phaselocked loop, Direct Digital Frequency Synthesizers DDS, first filter, second filter, third filter,
4th filter, the first frequency mixer, the second frequency mixer, the first power amplifier, the second power amplifier and frequency multiplier；Wherein:
The input terminal of the output end of crystal oscillator and phaselocked loop connects, the output end of phaselocked loop respectively with frequency multiplier, the
One filter is connected with the input terminal of DDS, and the input terminal of the output end of frequency multiplier and second filter connects, first filter and
The output end of DDS is connect with the input terminal of the first frequency mixer；The output end of first frequency mixer and the input terminal of third filter connect
It connects, the output end of third filter is connect with the input terminal of the first power amplifier；Second filter and the first power amplifier
Output end connect with the input terminal of the second frequency mixer, the input terminal of the output end of the second frequency mixer and the second power amplifier connects
Connect, the output end of the second power amplifier is connect with the input terminal of the 4th filter, the output of the output end of the 4th filter for
The millimeter wave local oscillation signal that millimetre-wave radar uses.
Optionally, the DDS external reference signal, and will be described by the divided offer of output signal of crystal oscillator
Input signal of the DDS external reference signal as DDS, the input signal of the DDS obtain after the frequency multiplication of phase locked loop inside DDS
Reference signal inside DDS.
Optionally, the signal that the output signal that the crystal oscillator generates is 100MHz, crystal oscillator is by generation
The signal of 100MHz inputs phaselocked loop, and the signal of 100MHz is obtained the signal of 50MHz by phaselocked loop after dividing twice, and should
The signal of 50MHz is transmitted to DDS as the input signal of DDS；DDS is by the input signal of the 50MHz through the locking phase inside DDS
X20 times of ring obtains the reference signal of 1GHz inside the DDS.
Optionally, the third filter of the DDS output end connection is five rank LC bandpass filters.
Optionally, the signal of the DDS output end output is mixed with the signal that first filter output end exports through first
The output signal obtained after device mixing, total phase noise of the output signal are greater than the phase of the local oscillation signal of Sweep Source final output
Position noise.
Optionally, the phaselocked loop is integrated voltage controlled oscillator formula phaselocked loop；
The output signal that the phaselocked loop generates the crystal oscillator generates fixed frequency as input reference signal
Pll output signal, and the output signal that generates of the phaselocked loop is through caused by first filter filters out after harmonic wave, then
The first frequency mixer is input to be mixed.
Optionally, the first filter of the phaselocked loop output end connection is high-pass filter.
Optionally, the output signal that the phaselocked loop generates carries out power distribution through the power divider inside phaselocked loop,
A quadruple is carried out by frequency multiplier later, the later signal of quadruple is by second filter to the harmonic wave generated after frequency multiplication
It is filtered, after filtered signal is mixed by the second frequency mixer with the treated output signal that DDS is generated, then
Two frequencys multiplication are carried out by the second power amplifier, the output signal obtained after two frequencys multiplication is filtered via the 4th filter again,
The local oscillation signal of final output millimeter wave.
Optionally, the second filter is five rank hair fastener type microstrip filters.
Optionally, the third filter is dielectric filter, and the 4th filter is ceramic filter, and by the ceramics
Filter is assembled in the frequency conversion channel of the local oscillation signal of Sweep Source output.
The present invention also provides a kind of UAV system, comprising: unmanned plane；The cabinet of millimetre-wave radar, the millimeter wave
Radar includes any Sweep Source；The cabinet is attached on the unmanned plane by bindiny mechanism.
A kind of Sweep Source for millimetre-wave radar of the present invention can achieve it is following the utility model has the advantages that
The Sweep Source includes crystal oscillator, phaselocked loop, Direct Digital Frequency Synthesizers DDS, first filter, the second filter
Wave device, third filter, the 4th filter, the first frequency mixer, the second frequency mixer, the first power amplifier, the second power amplification
Device and frequency multiplier；Wherein, the input terminal of the output end of crystal oscillator and phaselocked loop connects, and the output end of phaselocked loop is respectively and again
Frequency device, first filter are connected with the input terminal of DDS, and the output end of frequency multiplier and the input terminal of second filter connect, and first
The output end of filter and DDS are connect with the input terminal of the first frequency mixer；The output end of first frequency mixer and third filter
Input terminal connection, the output end of third filter are connect with the input terminal of the first power amplifier；Second filter and the first function
The output end of rate amplifier is connect with the input terminal of the second frequency mixer, the output end of the second frequency mixer and the second power amplifier
Input terminal connection, the output end of the second power amplifier are connect with the input terminal of the 4th filter, the output end of the 4th filter
Export the millimeter wave local oscillation signal used for millimetre-wave radar；The Sweep Source institute can be met using a phaselocked loop by having reached
The purpose for needing performance indicator, reduces the circuit area of Sweep Source, while also reducing the deployment cost of Sweep Source.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Pointed content is achieved and obtained in book, claims and attached drawing.
Below by drawings and examples, technical solution of the present invention is described further.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of structure composition schematic diagram of embodiment of existing Sweep Source；
Fig. 2 is structure composition schematic diagram of the present invention for a kind of embodiment of the Sweep Source of millimetre-wave radar；
Fig. 3 is the structural schematic diagram of the bindiny mechanism of UAV system in the present invention；
Fig. 4 is a kind of structural schematic diagram of earth station in UAV system in the present invention；
Fig. 5 is another structural schematic diagram of earth station in UAV system in the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The present invention provides a kind of Sweep Sources for millimetre-wave radar, frequency sweep can be realized using a phaselocked loop
Performance indicator needed for source, compared with the scheme of the description of the embodiment described in Fig. 1, Sweep Source provided by the invention reduces at least one
The half above circuit area；The equipment cost of Sweep Source is also reduced simultaneously.
The basic principle of Sweep Source are as follows: be mixed by the phaselocked loop of fixed frequency with DDS waveform generator, generate tune
Frequency signal, then generate final local oscillation signal by frequency multiplication by phaselocked loop and export, it is used for millimetre-wave radar.As shown in Figure 1, figure
1 is structure composition schematic diagram of the present invention for a kind of embodiment of the Sweep Source of millimetre-wave radar；The present invention is used for millimeter
The Sweep Source of wave radar includes: crystal oscillator, phaselocked loop, Direct Digital Frequency Synthesizers DDS, first filter, the second filter
Wave device, third filter, the 4th filter, the first frequency mixer, the second frequency mixer, the first power amplifier, the second power amplification
Device and frequency multiplier；Wherein, for above-mentioned each component according to main signal flow, connection relationship is as follows:
The input terminal of the output end of crystal oscillator and phaselocked loop connects, the output end of phaselocked loop respectively with frequency multiplier, the
One filter is connected with the input terminal of DDS, and the input terminal of the output end of frequency multiplier and second filter connects, first filter and
The output end of DDS is connect with the input terminal of the first frequency mixer；The output end of first frequency mixer and the input terminal of third filter connect
It connects, the output end of third filter is connect with the input terminal of the first power amplifier；Second filter and the first power amplifier
Output end connect with the input terminal of the second frequency mixer, the input terminal of the output end of the second frequency mixer and the second power amplifier connects
Connect, the output end of the second power amplifier is connect with the input terminal of the 4th filter, the output of the output end of the 4th filter for
The millimeter wave local oscillation signal that millimetre-wave radar uses.
In actual use environment, the signal frequency of the output according to needed for Sweep Source, to configure the Sweep Source
Main components.For example, the main indicator of Sweep Source is as follows: swept bandwidth: 5940MHz in a specific application scenarios
~6000Hz；Frequency swept waveform: triangular wave；Frequency sweep cycle: 1.6mS rises, 1.6mS decline；Swept frequency stepping time :≤4ns；
Output power: 15dBm；Export sample clock frequency: 100MHz；Export sampling clock power: 4~6dBm；Local oscillator output:
24GHz；Internal reference clock is short steady (10ms, 100ms, 1S) :≤5 × 10-11；(- 40 DEG C of internal reference clock temperature stability
~+85 DEG C) :≤0.2ppm；Internal reference clock frequency accuracy :≤3 × 10-7；Clutter recognition :≤- 40dBc；Harmonics restraint:
≤-30dBc；Spurious reduction: >=85dBc (f0 ± 400kHz), >=80dBc (f0 ± 3MHz), remaining >=50dBc)；Phase noise
(including frequency sweep and determine local oscillator): better than -92dBc/Hz@1kHz, -100dBc/Hz@10kHz, -105dBc/Hz@100kHz, -
120dBc/Hz@1MHz, monotonic decreasing；According to the specific performance index parameter of above-mentioned Sweep Source, such as model can be chosen
The phaselocked loop of ADF4356, performance parameter is as follows, frequency range: 53~6800MHz；Output power: 0dBm；Harmonic wave: 26dBc
(second)；32dBc(third)；Voltage/current :+3.3V/200mA；+5V/80mA.According to the specific performance of above-mentioned Sweep Source
Index parameter can choose the Direct Digital Frequency Synthesizers DDS of such as model AD9910, and performance parameter is as follows, frequency:
10~400MHz；Output power: -5~5dBm；Voltage/current :+3.3V/40mA；+1.8V/350mA.According to above-mentioned Sweep Source
Specific performance index parameter, the crystal oscillator of such as model HEISBN-100MHz can be chosen, performance parameter is such as
Under, it is short steady: 0.05ppb/s；Output power: >=7dBm；Harmonic wave: > 30dBc；Clutter: > 60dBc；Phase noise: -150dBc/
1K；-155dBc/10K；Current/voltage :+5V/500mA.
In one embodiment, in order to reduce Sweep Source functional module volume, the DDS external reference signal is by crystalline substance
The divided offer of the output signal of oscillation body device, and using the DDS external reference signal as the input signal of DDS, the DDS
Input signal the reference signal inside DDS is obtained after the frequency multiplication of phase locked loop inside DDS.
Specifically, in one embodiment, the signal that the output signal that the crystal oscillator generates is 100MHz, crystal
The signal of the 100MHz of generation is inputted phaselocked loop by oscillator, and phaselocked loop obtains the signal of 100MHz after dividing twice
The signal of 50MHz, and DDS is transmitted to using the signal of the 50MHz as the input signal of DDS；DDS is by the input of the 50MHz
Signal obtains the reference signal of 1GHz inside the DDS through X20 times of phaselocked loop inside DDS.
In actual application scenarios, it is contemplated that the spuious problem and DDS output signal of DDS and fixed local oscillator mixing
Local oscillator afterwards inhibits problem, and the output frequency for choosing DDS is 150MHz~210MHz.By to the fixed spuious test of frequency point of DDS
The spuious test carried out under emulation and DDS scanning mode is emulated, and DDS is in this frequency range 150MHz~210MHz, emulation
The degree of suppression of its harmonic wave is about 35dBc@300MHz, 25dBc@410MHz as the result is shown, other are closer spuious apart from frequency band
Degree of suppression about 50dBc.Therefore, in order to preferably be inhibited to harmonic signal, level-one 5 can be cascaded in DDS output end
Rank LC with bandpass filter；I.e. as shown in Fig. 2, the third filter of DDS output end connection is five rank LC bandpass filters.
In one embodiment, for the phase noise of DDS, since the DDS joins by internal phase lock loop locks 1GHz
In the case where examining signal, the phase noise for inputting 200MHz is about -118dBc/1K, -130dBc/10K；Most due to Sweep Source
The frequency exported eventually is to generate after being mixed, and total phase noise is influenced by the lower local oscillation signal of phase noise, therefore, the phase of DDS
The index of position noise need to only guarantee to be greater than local oscillation signal phase noise；That is, for the signal of DDS output end output
The output signal obtained after being mixed with the signal of first filter output end output through the first frequency mixer, total phase of the output signal
Position noise is greater than the phase noise of the local oscillation signal of Sweep Source final output.
In one embodiment, in order to further decrease the volumes of Sweep Source respective modules, the phaselocked loop is using integrated
Voltage controlled oscillator formula phaselocked loop；The output signal that the phaselocked loop generates the crystal oscillator is as input with reference to letter
Number, the pll output signal of fixed frequency is generated, and the output signal that the phaselocked loop generates filters out institute through first filter
After the harmonic wave of generation, then it is input to the first frequency mixer and is mixed.Further, the first filter of the phaselocked loop output end connection
Wave device is high-pass filter.
In a specific application scenarios, since phaselocked loop is using the signal that frequency is 100MHz as reference, fixation is generated
Output frequency 3310MHz, and the characteristic for the device that the phaselocked loop uses itself determines the secondary and triple-frequency harmonics of its output signal
Degree of suppression is about 25dBc, therefore, filters out the humorous of generation that can cascade high-pass filter after pll output signal
Wave；For example, filtering out the harmonic wave of generation using HFCN-3100+ and LFCN-3400+, harmonics restraint degree can accomplish 50dBc.
In one embodiment, the output signal that the phaselocked loop generates carries out function through the power divider inside phaselocked loop
Rate distribution, carries out a quadruple by frequency multiplier later, and the later signal of quadruple passes through second filter to producing after frequency multiplication
Raw harmonic wave is filtered, and filtered signal is carried out by the treated output signal that the second frequency mixer and DDS are generated
After mixing, then pass through the second power amplifier and carry out two frequencys multiplication, the output signal obtained after two frequencys multiplication is again via the 4th filter
It is filtered, the local oscillation signal of final output millimeter wave.
Since quadrupler can generate the harmonic wave than more rich fundamental wave, if unclean to above-mentioned harmonic management, enter
After rear class frequency multiplier bigger interference can be formed again by frequency multiplication；Therefore, it is necessary to five rank hair fastener of level-one is cascaded after quadrupler
Decline band filter；The second filter being arranged after frequency multiplier i.e. as shown in Figure 2 is five rank hair fastener type microstrip filters.
In one embodiment, in order to filter out the closer local oscillation signal of distance DDS output signal, shown in Fig. 2 first is mixed
The rear class filtering device of frequency device, i.e., the described third filter are filtered using dielectric filter.In addition, humorous due to local oscillation signal
Wave farther out, therefore, is filtered through the amplified rear class filtering device of the second power amplifier using ceramic filter, and will be above-mentioned
Ceramic filter is assembled in frequency conversion channel；4th filter i.e. as shown in Figure 2 is ceramic filter, and by the ceramic filtering
Wave device is assembled in the frequency conversion channel of the local oscillation signal of Sweep Source output.
Sweep Source of the present invention for millimetre-wave radar includes: crystal oscillator, phaselocked loop, Direct Digital Frequency Synthesizers
DDS, first filter, second filter, third filter, the 4th filter, the first frequency mixer, the second frequency mixer, the first function
Rate amplifier, the second power amplifier and frequency multiplier；Wherein: the output end of crystal oscillator and the input terminal of phaselocked loop connect,
The output end of phaselocked loop is connect with the input terminal of frequency multiplier, first filter and DDS respectively, the output end of frequency multiplier and the second filter
The input terminal of wave device connects, and the output end of first filter and DDS are connect with the input terminal of the first frequency mixer；First frequency mixer
Output end is connect with the input terminal of third filter, and the input terminal of the output end of third filter and the first power amplifier connects
It connects；The output end of second filter and the first power amplifier is connect with the input terminal of the second frequency mixer, the second frequency mixer it is defeated
Outlet is connect with the input terminal of the second power amplifier, and the input terminal of the output end of the second power amplifier and the 4th filter connects
It connects, the output end of the 4th filter exports the millimeter wave local oscillation signal used for millimetre-wave radar；With using a locking phase
Ring is the beneficial effect of performance indicator needed for can reach the Sweep Source, reduces the circuit area of Sweep Source, while also reducing
The deployment cost of Sweep Source.
The present invention also provides a kind of UAV system, comprising: unmanned plane；The cabinet of millimetre-wave radar, the millimeter wave
Radar includes Sweep Source described in aforementioned any embodiment；The cabinet is attached on the unmanned plane by bindiny mechanism.In the least
(either internally or externally, placement location can be designed according to actual needs) on its settable cabinet of each device of metre wave radar,
The cabinet is set on unmanned plane by bindiny mechanism,
As shown in figure 3, the bindiny mechanism includes adsorbing mechanism, rotating mechanism and clamping device, in which:
Adsorbing mechanism is used to for bindiny mechanism being integrally fixed to the outer surface of unmanned plane；The adsorbing mechanism includes: first
Pedestal 53 and first connecting rod 45 have on the first end end of first connecting rod 45 wheel-shaped body 44, second end to connect by first rotating shaft 46
It is connected in the first end of the first pedestal 53；The quadrangle of first pedestal 53 is respectively provided with the identical hemisphere protrusion 41 of a structure, and hemisphere is convex
It plays 41 and is built-in with sucker 63；Sucker 63 is equipped with a second connecting rod 42 through 41 top of hemisphere protrusion；Second connecting rod 42 passes through
Second shaft 43 and the wheel-shaped body 44 of the first end end of first connecting rod 45 are rotatablely connected；The fixation of itself and the outer surface of unmanned plane
Step are as follows: sucker 63 is bonded with the smooth outer surface of uav belly, pushes the first pedestal 53, the colyliform of first connecting rod 45
Body 44 and the top surface of hemisphere protrusion 41 come into contact with, and pressure is gradually increased, and under cam action principle, first connecting rod 45 is driven
Sucker 63 moves synchronously and extracts its interior vacuum, adsorbs it with smooth outer surface；Disassembly with the outer surface of unmanned plane walks
It is rapid: when sucker 63 and smooth outer surface are adsorbed, the first pedestal 53 is promoted, that is, is pulled outwardly the first pedestal 53, first connecting rod 45
Wheel-shaped body and the top surface of hemisphere protrusion 41 are gradually disengaged, and pressure is gradually reduced, and first connecting rod 45 is moved into hemisphere protrusion 41,
Dynamic sucker 63 gradually discharges vacuum, is detached from it with smooth outer surface；
Rotating mechanism, comprising: be internally provided with rotating device in the second end of the first pedestal 53, second end and the first base
The first end of seat 53 is opposite end；The end face of the second end of first pedestal 53 and rotating device are orthogonal；Rotating device includes:
Central rotating shaft 47, steel ball 51, roller bearing 50, disc type outer cover 48, central rotating shaft 47 run through clutch disk formula outer cover 48, center
Shaft 47 and disc type outer cover 48 are mechanically connected, and the side of the second end far from the first pedestal 53 of disc type outer cover 48 is provided with
Roller bearing 50；Roller bearing 50 welds together with central rotating shaft 47, and the steel ball 51 is set to inside roller bearing 50, steel ball
51 are mechanically connected with roller bearing 50；The fixation of roller bearing 50 is embedded in the first end of the second pedestal 64；Disc type outer cover 48
It is embedded in inside the second end of the first pedestal 53；It is provided with micro servo motor on the unmanned plane, which is used for
Roller bearing 50 is driven to rotate, so that the roller bearing 50 in rotation can drive the second pedestal 64 to start to rotate；First pedestal 53
At least there are two opposite end is longer than the respective end of the second pedestal 64；
Clamping device is for clamping above-mentioned cabinet, which includes: the second pedestal 64, the second of the second pedestal 64
Two pairs of holding frames being oppositely arranged are set on the surface at end, and two holding frames are located at the side on the surface of the second end of the second pedestal 64
At edge, each holding frame include perpendicular to the surface of the second end of the second pedestal 64 vertical bar 59, be parallel to the second pedestal 64
The cross bar 60 on the surface of second end, the vertical bar 61 parallel with vertical bar 59, wherein the top of vertical bar 59 and the first end of cross bar 60 are solid
Fixed connection, cross bar 60 second end be fixedly connected with the first end of vertical bar 61, vertical bar 61 is shorter than vertical bar 59；The second end of vertical bar 61
It is fixedly connected with a sucker 62, opening the second pedestal 64 of direction of sucker 62；In the surface of the second end of the second pedestal 64
Inside heart district domain, it is provided with a cylinder shape groove 54, the open end size of cylinder shape groove 54 is less than the cross of cylinder shape groove 54
Cross-sectional sizes；The bottom of cylinder shape groove 54 is provided at least one air bag 55, and the top of air bag 55 places one can be up and down
Circular limit plate 56, the cross-section adaptation of the size of circular limit plate 56 and cylinder shape groove 54；56 center of circular limit plate
A cylindrical support block 57 is fixedly connected with above region, cylindrical support block 57 can pass through cylinder shape groove 54 up and downly
Open end and the size of cylindrical support block 57 be adapted to the open end of cylinder shape groove 54；Cylindrical support block 57
Upper surface is provided with flexible touch sensation sensor；Its working principle is that: inflator pump is set on unmanned plane, place cabinet 58 it
Before, first the air in air bag 55 is emptied, then cabinet 58 is placed between cylindrical support block 57 and sucker 62, is then controlled
Inflator pump processed is inflated to air bag 55, and obtains the haptic signal that flexible touch sensation sensor senses in real time, when haptic signal reaches
When preset strength, stop inflating to air bag, so that cabinet 58 is held between cylindrical support block 57 and sucker 62.
Using above-mentioned bindiny mechanism, above-mentioned cabinet can be placed in the abdomen of unmanned plane, to utilize the device in cabinet
Part completes the foreign bodies detection to airfield runway.When recycling cabinet, rotating mechanism rotation can control, so that vertical bar 59 is parallel to
Ground, then, control air bag 55 are deflated, so that cabinet 58 is no longer by the clamping of cylindrical support block 57 and sucker 62, thus
Under gravity, cabinet is detached from unmanned plane, in this way, can not need manually to tear open in order to remove cabinet from unmanned plane
It removes, improves dismounting efficiency.Meanwhile the unmanned plane also has the advantages that be previously used for the Sweep Source of millimetre-wave radar, so that milli
Circuit area reduces in metre wave radar, to reduce the size of millimetre-wave radar, and deployment cost is low.
In one embodiment, above-mentioned UAV system further includes earth station, is used to communicate with unmanned plane, including ground
Antenna 17, rotatable platform 14, support platform 11, rotary electric machine 12, ground end sensor 18, ground side controller 13, pedestal 15,
Pedestal support leg 16, pedestal support leg 16 are set as several, and distribution is connected to 15 lower section of pedestal, and 15 upper surface of pedestal is equipped with branch
Platform 11 is supportted, the support platform top is embedded to be provided with rotary electric machine 12, and the output shaft of rotary electric machine 12 is arranged upward vertically,
Ground side controller 13 is additionally provided in the support platform, the output shaft of the rotary electric machine 12 is connected with rotatable platform 14,
Ground-plane antenna 17 and ground end sensor 18 are installed on rotatable platform 14.
In use, detecting initial position by sky end sensor and passing ground side controller 13, ground side controller 13 back
After orientation where carrying out analytical judgment unmanned plane, sends a signal to rotary electric machine 12 and execute rotation, rotatable platform 14 is driven to revolve
Turn, makes it that ground-plane antenna 17 be driven to arrive the direction angle (for example, towards heading of unmanned plane) that sensor gives.
In order to avoid earth station is slided on the ground and is not fixed easily, in one embodiment, the application is also to pedestal branch
The structure of support foot 16 is improved, specifically: the support leg 26 includes being fixed at the damping of the first shell bottom
Device 16-2, the sucker 16-1 set on the lower surface the damping device 16-2；The sucker 16-1 include suction cup main body 16-11,
The shield 16-12 that covers on the outside of the suction cup main body 16-11, it is fixed among the upper surface the suction cup main body 16-11
The attachment base 16-13 of position, one end are fixed at the upper surface the attachment base 16-13 other end and are arranged in the shield 16-
The compression set 16-14 in 12 middle positions, it is sheathed on the outside of the compression set 16-14 and is set to the shield 16-12
Upper surface and the adjusting nut 16-15 being flexibly connected with the compression set 16-14 by screw thread, it is fixed at the shield
The non-slip mat 16-16 of the bottom surface 16-12, the adjusting nut 16-15 lateral wall are fixed with rotating arm 16-151；The damping dress
Setting 16-2 includes that the lower installation board 16-21 for being fixed at the upper surface the compression set 16-14, one end are fixed at the lower peace
The damper cylinder 16-22 of the upper surface loading board 16-21, one end nesting be set in the damper cylinder 16-22 and with the damper cylinder 16-22
The piston rod 16-23 that is slidably connected, be sheathed on the outside of the piston rod 16-23 and damper cylinder 16-22 and bottom with it is described
The first spring 16-24 that the upper surface lower installation board 16-21 is fixedly connected, the bullet being fixed on the upside of the first spring 16-24
Spring abutment 16-25, the upper mounting plate 16-26 being sheathed on the outside of the spring base 16-25.
Preferably, the compression set 16-14 include the motion bar 16-141 for being fixed at the upper surface attachment base 16-13,
It is coaxially fixed at cock body 16-142, coaxial sleeve of the motion bar 16-141 far from the side the attachment base 16-13 and is set to institute
The step sliding seat 16-143 for stating the one end motion bar 16-141, the second spring being sheathed on the outside of the motion bar 16-141
16-144, it covers at the upper surface step sliding seat 16-143 and is fixed with the upper surface step sliding seat 16-143
The shell 16-145 of connection, the one end the second spring 16-144 contact with the upper surface step sliding seat 16-143, are another
One end and the cock body 16-142 following table face contact, the outside cock body 16-142 is also arranged with to be contacted with shell 16-145 inner wall
Sealing ring, the upper surface the sucker ontology 16-11 middle position be equipped with first row stomata 16-17, the attachment base 16-13,
Second exhaust through-hole 16- corresponding with first row stomata 16-17 is coaxially provided with inside motion bar 16-141, cock body 16-142
18, the shell 16-145 upper side wall is equipped with corresponding with the first exhaust through-hole 16-17, second exhaust through-hole 16-18 the
Exhaust valve is equipped at three exhaust hole 16-19, the third exhaust hole 16-19；When fixed, rotation rotating arm is first passed through first
16-151 drives adjusting nut 16-15 rotation, the adjusting nut 16-15 is rotated to the shell 16-145 topmost, so
Afterwards by the bottom suction cup main body 16-11 and ground face contact, adjusting nut 16-15 rotation is then being driven by rotation pivoted arm 16-151
To make adjusting nut 16-15 move down, when pressing down suction cup main body 16-11, under the reaction force of its suction cup main body 16-11,
Attachment base 16-13 up moves that motion bar 16-141, cock body 16-142 is driven up to move, and makes motion bar 16-141 and plug
Second exhaust through-hole 16-18 among body 16-142 is connected to third exhaust hole 16-19, makes suction cup main body 16-11 and ground
Between gas be discharged by exhaust valve, so that suction cup main body 16-11 be driven firmly to adsorb on the ground, wherein non-slip mat 6-
16 can guarantee that suction cup main body 16-11 will not there is a phenomenon where sidesways, while compression set 16-14 can play buffer function,
To guarantee that suction cup main body is preferably adsorbed on the ground；Meanwhile it being set between the lower installation board 16-21 and spring base 16-25
There are damper cylinder 16-22 and piston rod 16-23 and be slidably connected between the two, makes piston rod 16-23 can be with the inside damper cylinder 16-22
Telescopic slide up and down is carried out, to make the spring base 16-25 under the action of the first spring 16-24 in the lower installation board
It is moved on 16-21, to make speaker at work, when loudspeaker plays music outside, volume causes greatly very much speaker first shell 12 to be shaken
Dynamic, the vibration of first shell 12 drives piston rod 16-23 upper and lower telescopic slide and first spring 16- in damper cylinder 16-22
Reduce the movement of lower installation board 16-21 under the action of 24, resonates when so as to avoid earth station's work.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software emulation embodiment or combine software and hardware
Embodiment form.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of Sweep Source for millimetre-wave radar, which is characterized in that the Sweep Source for millimetre-wave radar includes: crystalline substance
Oscillation body device, phaselocked loop, Direct Digital Frequency Synthesizers DDS, first filter, second filter, third filter, the 4th filter
Wave device, the first frequency mixer, the second frequency mixer, the first power amplifier, the second power amplifier and frequency multiplier；Wherein:
The output end of crystal oscillator and the input terminal of phaselocked loop connect, and the output end of phaselocked loop is filtered with frequency multiplier, first respectively
Wave device is connected with the input terminal of DDS, and the output end of frequency multiplier and the input terminal of second filter connect, first filter and DDS
Output end connect with the input terminal of the first frequency mixer；The output end of first frequency mixer is connect with the input terminal of third filter,
The output end of third filter is connect with the input terminal of the first power amplifier；Second filter and the first power amplifier it is defeated
Outlet is connect with the input terminal of the second frequency mixer, and the output end of the second frequency mixer is connect with the input terminal of the second power amplifier,
The output end of second power amplifier is connect with the input terminal of the 4th filter, and the output end of the 4th filter exports for millimeter
The millimeter wave local oscillation signal that wave radar uses.
2. Sweep Source as described in claim 1, which is characterized in that the DDS external reference signal is by the defeated of crystal oscillator
The divided offer of signal out, and using the DDS external reference signal as the input signal of DDS, the input signal of the DDS passes through
The reference signal inside DDS is obtained after frequency multiplication of phase locked loop inside DDS.
3. Sweep Source as claimed in claim 2, which is characterized in that the output signal that the crystal oscillator generates is 100MHz
Signal, the signal of the 100MHz of generation inputs phaselocked loop by crystal oscillator, and phaselocked loop is divided the signal of 100MHz twice
The signal of 50MHz is obtained after frequency, and is transmitted to DDS for the signal of the 50MHz as the input signal of DDS；DDS will be described
The input signal of 50MHz obtains the reference signal of 1GHz inside the DDS through X20 times of phaselocked loop inside DDS.
4. Sweep Source as claimed in claim 2, which is characterized in that the third filter of the DDS output end connection is five ranks
LC bandpass filter.
5. Sweep Source as claimed in claim 2, which is characterized in that the signal and first filter of the DDS output end output
The output signal that the signal of output end output obtains after the mixing of the first frequency mixer, total phase noise of the output signal, which is greater than, to be swept
The phase noise of the local oscillation signal of frequency source final output.
6. such as Sweep Source described in any one of claim 1 to 5, which is characterized in that the phaselocked loop is integrated voltage controlled oscillation
Device formula phaselocked loop；
The output signal that the phaselocked loop generates the crystal oscillator generates the lock of fixed frequency as input reference signal
Phase ring output signal, and the output signal that generates of the phaselocked loop is through caused by first filter filters out after harmonic wave, then inputs
It is mixed to the first frequency mixer.
7. Sweep Source as claimed in claim 6, which is characterized in that the first filter of the phaselocked loop output end connection is height
Bandpass filter.
8. such as Sweep Source described in any one of claim 1 to 5, which is characterized in that the output signal warp that the phaselocked loop generates
Power divider inside phaselocked loop carries out power distribution, carries out a quadruple by frequency multiplier later, and quadruple is later
Signal is filtered the harmonic wave generated after frequency multiplication by second filter, and filtered signal passes through the second frequency mixer and DDS
After the treated output signal generated is mixed, then passes through the second power amplifier and carry out two frequencys multiplication, after two frequencys multiplication
To output signal be filtered again via the 4th filter, the local oscillation signal of final output millimeter wave.
9. such as Sweep Source described in any one of claim 1 to 5, which is characterized in that the third filter is dielectric filter,
4th filter is ceramic filter, and the ceramic filter is assembled in the frequency conversion channel for the local oscillation signal that Sweep Source exports
It is interior.
10. a kind of UAV system characterized by comprising unmanned plane；The cabinet of millimetre-wave radar, the millimetre-wave radar
Including the Sweep Source as described in any in claim 1 to 9；The cabinet is attached on the unmanned plane by bindiny mechanism.
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