CN108758189A - A kind of scanning platform for imaging radiometer - Google Patents
A kind of scanning platform for imaging radiometer Download PDFInfo
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- CN108758189A CN108758189A CN201711483582.3A CN201711483582A CN108758189A CN 108758189 A CN108758189 A CN 108758189A CN 201711483582 A CN201711483582 A CN 201711483582A CN 108758189 A CN108758189 A CN 108758189A
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- guide rail
- sliding block
- guide
- displacement mechanism
- scanning platform
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- 238000003384 imaging method Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 238000006073 displacement reaction Methods 0.000 claims abstract description 36
- 239000002828 fuel tank Substances 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 43
- 239000010720 hydraulic oil Substances 0.000 claims description 29
- 239000000872 buffer Substances 0.000 claims description 21
- 238000013000 roll bending Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/22—Undercarriages with or without wheels with approximately constant height, e.g. with constant length of column or of legs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Transmission Devices (AREA)
Abstract
The present invention discloses a kind of scanning platform for imaging radiometer, including half-set；First straight line displacement mechanism, second straight line displacement mechanism, oil pump are connected to the straight-line displacement mechanism and a fuel tank；Controller connects the straight-line displacement mechanism and oil pump；And host computer communicate through a serial port with the controller is provided with display device on the host computer；The straight-line displacement mechanism includes：Driving mechanism, the first guide rail, the first sliding block, it is slidably arranged in first guide rail, the second guide rail, is arranged in first guide rail upper end, second sliding block, it is slidably arranged in second guide rail, third sliding block, is connected to second upper end of slide block, range finder module, wherein, oil pump is connected to by a solenoid valve with the internal heads space of second guide rail, and flow meters are provided on the solenoid valve.The present invention solves the inaccurate technical problem of surface sweeping platform upper slide unit displacement distance.
Description
Technical field
The present invention relates to automatic control technology fields, and in particular to a kind of scanning platform for imaging radiometer.
Background technology
Millimeter wave aperture synthesis imaging radiometer, hereinafter referred to as radiometer, the antenna array pair formed using small aperture antenna
The millimeter-wave radiation signal of target scene carries out high-sensitivity measurement, and the visible of scene is measured by the multiple correlation operation between array element
Function is spent, and is finally inversed by the bright temperature distributed image of target scene.Compared with traditional real aperture imaging technology, aperture synthesis is imaged skill
Art has the characteristics that real-time is good, spatial resolution is high, can be under the conditions of atrocious weather, such as haze, night etc. are realized
To the high-resolution real time imagery of the metal target of concealment, obtained extensively in fields such as military, navigation, medical treatment and traffic safety checks
General application.It is binary interferometer that the basis of synthesis aperture image-forming system, which is constituted, can realize target by two-dimensional antenna scanning platform
The coherent imaging of scene.
Slide unit on existing two-dimensional antenna scanning platform is usually to be directly driven by a motor, and motor has minimum step angle
It is rotated with inertia, causing slide unit to be advanced every time all can be there are one Minimum sliding distance so that is produced with target location the position of slide unit
Raw deviation causes the scan position for the antenna being mounted on slide unit to generate deviation, finally so that image fault.On the other hand, by
It is long in the lead screw that driving slide unit is advanced, and have slight bending, lead screw produces periodic weak vibrations when rotating, and leads
Slide unit is caused also to shake so that antenna is shaken, and eventually causes flating, influences image quality.
Invention content
It is an object of the invention to solve at least the above, and provide the advantages of at least will be described later.
The object of the present invention is to provide a kind of two-dimensional antenna scanning platforms for radiometer, make aperture synthesis image-forming radiation
The array-element antenna of meter carries out flat scanning according to certain operating mode.Antenna is indirectly attached to ball screw by hydraulic system
On guide rail slide unit, stepper motor is controlled by stepper motor driver using microcontroller and is rotated, to drive slide unit progress horizontal
Or vertical direction movement, realize flat scanning.The present invention solves the inaccurate technology of surface sweeping platform upper slide unit displacement distance and asks
Topic.
In order to realize these purposes according to the present invention and other advantages, a kind of scanning for imaging radiometer is provided
Platform, including：
Half-set；
First straight line displacement mechanism is arranged on the horizontal support of the half-set；
Second straight line displacement mechanism is arranged on the longitudinal carrier of the half-set；
Oil pump is connected to the straight-line displacement mechanism and a fuel tank；
Controller connects the straight-line displacement mechanism and oil pump；And
Host computer communicate through a serial port with the controller is provided with display device on the host computer；
The straight-line displacement mechanism includes：
Driving mechanism is connect with the controller；
First guide rail is set as enclosed construction, one and the drive is provided with along its length in first guide rail
The lead screw of drive shaft connection is moved, be provided with one on the first guide rail tail end lateral wall is braked by the controller control
Device is provided with a collapsible braking anchor ear on the brake, brake(-holder) block is provided on the braking anchor ear madial wall, described
Brake is arranged by a damping on first guide rail, and the lead screw tail end protrudes from outside the first guide rail tail end
Side wall certain distance, and extend in the braking anchor ear；
First sliding block is slidably arranged in first guide rail, and first sliding block is set on the lead screw；
Second guide rail, setting is in first guide rail upper end, second guide rail interior space and the first guide rail interior
Space is connected in end point, and second guide rail upper end is covered with a cover board with a fluting；
Second sliding block is slidably arranged in second guide rail, first sliding block and first guide rail end it
Between and second sliding block and second guide rail end between be filled with hydraulic oil, second upper end of slide block is from described
A guide rod is extended upward in fluting；
Third sliding block is connected to the guide rod upper end, and the third sliding block is slidably arranged on the cover board, described
A roll bending for sealing the fluting is connected on guide rod；And
Range finder module, is arranged the tail end in second guide rail, and the ranging mouth of the range finder module is directed at the third
The tail end of sliding block, the output end of the range finder module are connect with the controller；
Wherein, the oil pump connects the entrance of a buffer by a solenoid valve, and hydraulic oil is filled in the buffer,
The longitudinal cross-section product of the buffer is accumulated not less than the longitudinal cross-section of second guide rail, the outlet of the buffer and described the
The internal heads space of two guide rails is connected to, and flow meters are provided on the solenoid valve.
Preferably, the straight-line displacement mechanism is arranged by a mounting base on the half-set, the driving mechanism
For stepper motor, the driving mechanism is drivingly connected by a connecting seat and the lead screw.
Preferably, the longitudinal cross-section of first sliding block is consistent with the longitudinal cross-section in first guide rail interior space, institute
It states and is provided with the first guiding groove on two madial wall of the first guide rail, the first guiding is correspondingly arranged on first slider side wall
Block, first guide pad is slidably arranged in described first and is oriented in groove, and the end periphery of first sliding block is provided with
First sealing ring.
Preferably, first center runs through along its length offers a threaded hole, and first sliding block passes through
The screw thread borehole jack is located on the lead screw, and thread seal set is provided between the threaded hole and lead screw.
Preferably, the first cover plate for sealing of first guide rail upper end, first cover board end point offer several logical
Hole；The second guide rail setting is in first cover board upper end, second guide rail interior space and the first guide rail interior space
It is connected to by the through-hole.
Preferably, the longitudinal cross-section of second sliding block is consistent with the longitudinal cross-section in second guide rail interior space, institute
It states and is provided with the second guiding groove on two madial wall of the second guide rail, the second guiding is correspondingly arranged on second slider side wall
Block, second guide pad is slidably arranged in described second and is oriented in groove, and the end periphery of second sliding block is provided with
Second sealing ring.
Preferably, the second cover plate for sealing of second guide rail upper end is provided with guide groove on second cover board, described
Third sliding block is slidably arranged in by the guide rod on the guide groove, and the fluting runs through along its length is opened in described the
Two cover plate centrals are provided with third on two madial walls of the fluting and are oriented to groove, and the is correspondingly arranged on the guide rod two side
Three guide pads, and the third is oriented in groove and is provided with seal gasket, the third guide pad is slidably arranged in the sealing
In rubber cushion.
Preferably, it is provided with a storage box on the outside of second guide rail, an elastic scrolling dress is provided in the storage box
It sets, the roll bending is provided with alignment opening, the roll bending is certainly around the elastic rolling device periphery is located on the storage box
It being open by the alignment by end and is connect with guide rod end side wall, the width of the roll bending is more than the width of the fluting,
Roll bending free end both sides are slidably arranged in the seal gasket.
Preferably, first sliding block is provided at both ends with the first touching switch, and second sliding block is provided at both ends with second
Touching switch, the third sliding block is provided at both ends with third touching switch, and second guide rail end protrusion is provided with an original
Point switch, the second guide rail tail end protrusion are provided with a limit switches, and each switch is connect with the controller.
Preferably, the fuel tank is arranged on the half-set, and the oil outlet of the oil pump inlet and the fuel tank connects
Logical, the outlet of the oil pump is connected to by the first solenoid valve with the entrance of the buffer, is provided on first solenoid valve
First flowmeter is provided with calibration oil return opening at the internal heads of second guide rail, and the calibration oil return opening passes through one second
Solenoid valve is connected to the tank drainback mouth, is provided with second flowmeter in the second solenoid valve, each solenoid valve and
Flowmeter is connect with the controller respectively.
Compared with prior art, the advantageous effect that the present invention includes is：
1, the present invention is realized on host computer using the serial communication between host computer and microcontroller to the control of scanning system
System and display, include manipulation to scanning system, the operating parameter for changing scanning system and the current slide unit position of real-time display,
Optimize the control process to scanning platform；
2, the present invention has the characteristics that precision is high, simple to operate, stability is good, safe, is integrated for millimeter wave
The high precision imaging of aperture radiation meter provides necessary platform base；
3, slide unit moving process of the invention is more accurate, and eliminates the shake of slide unit, improves image quality.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of the first straight line displacement mechanism of the present invention；
Fig. 3 is the structural schematic diagram of the first sliding block；
Fig. 4 is the first guide rail interior structural schematic diagram；
Fig. 5 is the second guide rail interior structural schematic diagram；
Fig. 6 is the second rail crown structural schematic diagram；
Fig. 7 is the assembling structure schematic diagram of third sliding block；
Fig. 8 is the side view of first straight line displacement mechanism；
Fig. 9 is the mounting structure schematic diagram of roll bending.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art with reference to comment
It can implement according to this.
As shown in figs 1-9, the present invention provides a kind of scanning platforms for imaging radiometer, including holder, straight line position
Telephone-moving structure, oil pump and control system.
The distribution applied to the two-dimensional array of imaging system mainly has at present：T-shape distribution, the distribution of " ten " font, U-typed
Distribution, Y-shaped distribution, circle distribution and other similar distributions etc..To the baselines of above-mentioned several Bidimensional antenne arrays (
Degree of opinion sampled point) distribution and point source imaging results (i.e. point spread function PSF) carry out simulation analysis after, it can be found that U-typed and
The array element distribution of T-shape antenna array is similar, their corresponding baseline profiles are all uniform distributed rectangular, and their array
Structure is relatively simple, therefore they are aperture synthesis aerial arrays more commonly used at present；But their baseline redundancy ratio
It is higher, although image recovery effects can be enhanced by carrying out average summation to identical baseline, their array-element antenna profit
It is not high with rate, therefore the spatial resolution of system is relatively low.And compared with T-shape array, U-typed array increases Vertical Square
Upward bay spacing, the azimuth resolution of vertical direction are improved, but it also makes being regarded without aliasing for vertical direction
Field becomes smaller so that aliasing occurs in its PSF.And Y-shaped and circumference type array have taken into account subtracting for antenna redundancy degree simultaneously
Small and System spatial resolution raising.Described T-shape is different with U-typed antenna array before, and Y-shaped and circumference type are big
Its baseline redundancy is reduced greatly, and improves their maximum baseline length.But unfortunately, Y-shaped lacks
More Long baselines, to lead to it be not apparent to resolution ratio improvement；And circumference type array is equal due to Long baselines distribution
It is even, preferably improve spatial resolution.But the raising of spatial resolution bring be baseline missing, by observing its
PSF is not difficult to find out there is more or less adjoint noise in its point source response, and can greatly influence successive objective with noise
Recovery；It is possible that it is more than that the original point source of weak signal target is rung that certain point sources, which respond the adjoint noise that stronger target generates,
It answers so that point source responds weaker target and can not be resumed out, due to stronger, this feelings with noise in circumference type array
Condition can be especially serious.
In order to enable imaging effect is more preferable, the present invention uses the antenna array of the good and simple in structure T-shape structures of PSF,
One half-set is provided thus, antenna movement is arranged to the antenna array that T-shape structure can be realized on half-set.
First straight line displacement mechanism 300, first straight line displacement mechanism are provided on the horizontal support of the half-set
300 are horizontally arranged at by mounting base 100 on the horizontal support, and second is provided on the longitudinal carrier of the half-set
Straight-line displacement mechanism 400, second straight line displacement mechanism 400 are vertically mounted on by mounting base 200 on longitudinal carrier, first straight line
It is provided with the third sliding block 700 for carrying antenna on displacement mechanism 300, is provided with and is used on second straight line displacement mechanism 400
Carry the third sliding block 800 of antenna.
First straight line displacement mechanism 300 is identical as the structure of second straight line displacement mechanism 400, and the present embodiment is to first straight line
Displacement mechanism 300 illustrates.
The first straight line displacement mechanism 300 includes：
Driving mechanism 310 is connect with the controller of scanning platform, and in the present embodiment, the driving mechanism 310 is using step
Stepper motor, in order to accurately be adjusted to each Scanning step；
First guide rail 320 is set as enclosed construction, and 320 upper end of the first guide rail is sealed with the first cover board 500,
First guide rail 320 is internally provided with accommodating space, and one and the driving machine are provided with along its length in first guide rail 320
Structure 310 drives the lead screw 340 of axis connection；Specifically, the driving mechanism 310 is driven by a connecting seat 311 and the lead screw 340
Dynamic connection, lead screw 340 are located at the center of 320 inner space of the first guide rail；
First sliding block 330 is slidably arranged in first guide rail 320, and first sliding block 330 be set in it is described
On lead screw 340, when driving mechanism 310 drives lead screw 340 to rotate, you can the first sliding block 330 of control comes in the first guide rail 320
Return is dynamic；
Second guide rail 540, setting is in 320 upper end of the first guide rail, specifically, second guide rail 540 overlapping is set
It sets in 500 upper end of the first cover board, the direction of the second guide rail 540 is consistent with the direction of the first guide rail 320, second guide rail
Accommodating space is also equipped with inside 540, and the inner space of the second guide rail 540 and 320 inner space of the first guide rail are in end point
Connection, specifically, 500 end point of the first cover board is longitudinally through several through-holes 510 are offered, second guide rail interior is empty
Between be connected to by the through-hole 510 with the first guide rail interior space；Second guide rail, 540 upper end is with one with a fluting 610
The second cover board 600 capping；
Second sliding block 520 is slidably arranged in second guide rail 540, and first sliding block 330 is led with described first
It is filled with hydraulic oil between 320 end of rail and between second sliding block 520 and 540 end of the second guide rail, and due to
Second guide rail interior space is connected in end point by the through-hole 510 with the first guide rail interior space, therefore, works as driving
When first sliding block moves back and forth in the first guide rail, will change second sliding block 520 and 540 end of the second guide rail it
Between hydraulic oil capacity, to change position of second sliding block in the second guide rail；It is opened from described second sliding block, 520 upper end
A guide rod 620 is extended upward in slot 610；
Third sliding block 700, is connected to 620 upper end of the guide rod, and the third sliding block 700 is slidably arranged in described second
On cover board 600, so that third sliding block 700, with 520 synchronizing moving of the second sliding block, antenna is arranged on third sliding block 700, by
Scanning of the antenna to target object can be completed in the position that step changes third sliding block；One is connected on the guide rod 620 for close
The roll bending 531 for sealing the fluting 610, for closing the fluting 610 between guide rod 620 and the second guide rail end so that second slides
A closed chamber is formed between block 520 and the second guide rail end；And
The tail end in second guide rail 540 is arranged in range finder module 350, and in of the invention, range finder module 350 is using red
Outer range sensor, the ranging mouth of the range finder module 350 are directed at the tail end of the third sliding block 700, are slided for measuring third
The acquisition information of the range finder module 350 is sent in the controller by the position and movement distance of block；
Wherein, it is additionally provided with an oil pump on connecting seat 311, connects the entrance of a buffer, is filled in the buffer
The outlet of hydraulic oil, the buffer is connected to the internal heads space of second guide rail 540, is provided on the solenoid valve
Flow meters, oil pump are used to be finely adjusted the hydraulic pressure oil capacity inside the second guide rail 540, that is, to the position of third sliding block
It is finely adjusted, therefore oil pump serves as the effect of an inching switch, the fine tuning of position is carried out by the volume of hydraulic oil, adjust
Step pitch smaller, adjustment distance more controllable precise.
Buffer is used to send oily process into row buffering in oil pump, and the longitudinal cross-section product of the buffer is not less than described second
The longitudinal cross-section of guide rail is accumulated, and when reducing oil pump start and stop, the moment that the oil mass of the second guide rail interior of oil mass pair of feeding generates rushes
It hits, that is, the second sliding block is caused to impact, cause the second sliding block down to third sliding block and the scanning on third sliding block
Thrashing influences image quality, and in the start and stop moment of oil pump, second is entered after the buffered device buffering of oil mass of oil pump pumping
Guide rail interior to slowly change the oil mass in the second guide rail, that is, slowly changes the position of the second sliding block, to be slided to second
The position of block is finely adjusted, and avoids causing the shake of the second sliding block in oil pump start and stop moment, so improve scanning system at
Image quality amount.
In above-mentioned technical proposal, the longitudinal cross-section of first sliding block 330 is vertical with 320 inner space of the first guide rail
It is consistent to section so that just activity fitting is arranged and is moved in the inner space of the first guide rail 320 the first sliding block 330, and institute
It states and is provided with the first guiding groove 321 on 320 liang of madial walls of the first guide rail, be correspondingly arranged on 330 side wall of the first sliding block
First guide pad 335, first guide pad 335 are slidably arranged in described first and are oriented in groove 321, are the first sliding block 330
Sliding provide guiding, while ensure the first sliding block 330 strictly along the direction of the first guide rail move linearly, reduce vertical misalignment
Amount, the final longitudinal judder for reducing the first sliding block, meanwhile, the end periphery of first sliding block 330 is provided with the first sealing
Circle 331, the first sliding block 330 is contacted by the first sealing ring 331 with the surrounding side walls of 320 inner space of the first guide rail, is protected
The leakproofness at 320 interior space position of the first sliding block 330 and the first guide rail is demonstrate,proved, is avoided the first sliding block 330 and first
Hydraulic oil leaks between 320 inner space tail end of the first sliding block 330 and the first guide rail between 320 inner space end of guide rail.
First sliding block, 330 center is run through along its length offers a threaded hole 334, and first sliding block 330 is logical
It crosses the threaded hole 334 to be set on the lead screw 340, driving mechanism is led to control the first sliding block first by rotary screw rod
Move back and forth in rail 320, changes the volume of hydraulic oil between the first sliding block 330 and 320 inner space end of the first guide rail, to
Change the volume of hydraulic oil between the second sliding block and the second guide rail interior space end, driving the second sliding block movement is final to change
The position of antenna on third sliding block drives antenna scanning target object.Antenna on platform of the present invention is indirect by hydraulic system
On ball screw guide rail slide unit, the position of antenna is adjusted by hydraulic system, hydraulic system is by changing hydraulic oil
Volume change Scanning step, minimum step smaller, and adjust accurate higher eliminates inclined between antenna and target location
Difference, shake when absorpting drive machine starts and shuts down, to antenna moving process more controllable precise, and passes through hydraulic pressure system
System, eliminates the shake of slide unit longitudinal direction, finally improves the scanning imagery quality of antenna.
It is provided with thread seal set 333 between the threaded hole 334 and lead screw 340, plays threaded hole 334 and lead screw
Sealing function between 340, avoids hydraulic oil from extending into threaded hole.
Similarly, the longitudinal cross-section one of the longitudinal cross-section of second sliding block 520 and 540 inner space of the second guide rail
It causes so that just activity fitting is arranged and is moved in the inner space of the second guide rail the second sliding block, and 540 liang of second guide rail
It is provided with the second guiding groove on madial wall, is correspondingly arranged on the second guide pad on 520 side wall of the second sliding block, described second
Guide pad is slidably arranged in described second and is oriented in groove, provides guiding for the sliding of the second sliding block, while ensureing the second sliding block
It strictly moves linearly along the direction of the second guide rail, reduces vertical misalignment amount, finally reduce the longitudinal judder of the second sliding block, together
When, the end periphery of second sliding block 520 is provided with the second sealing ring 522, the second sliding block 520 passes through the second sealing ring
522 contact with the surrounding side walls of 540 inner space of the second guide rail, ensure that the second sliding block 520 and 540 inside of the second guide rail are empty
Between leakproofness at contact position, avoid hydraulic pressure oil seepage between 540 inner space end of the second sliding block 520 and the second guide rail
To between 540 inner space tail end of the second sliding block 520 and the second guide rail.
Second sliding block is driven by hydraulic system, specifically, driving mechanism drives lead screw to rotate by setup program, is changed
The volume for becoming hydraulic oil between 320 inner space end of the first sliding block 330 and the first guide rail, to change the second sliding block and second
The volume of hydraulic oil between the end of guide rail interior space, driving the second sliding block movement, the final position for changing antenna on third sliding block
It sets, drives antenna scanning target object.
In above-mentioned technical proposal, it is provided with one on first guide rail, 320 tail end lateral wall and is controlled by the controller
Brake, a collapsible braking anchor ear is provided on the brake, and braking anchor ear is embraced by two contractile semi-circular shape
Hoop composition, two semi-circular shape anchor ears can expand outwardly or to contracts, and brake(-holder) block is provided on the braking anchor ear madial wall,
The lead screw tail end protrudes from the first guide rail tail end lateral wall certain distance, and extends in the braking anchor ear, driving
Mechanism 310 drives the rotation of lead screw 340 to drive the movement of the first sliding block 330, and then changes the position of antenna on third sliding block, works as third
When sliding block is moved to the target location of setting, in order to reduce influence of the driving mechanism inertia to third slider displacement, control braking
Anchor ear is shunk, by brake(-holder) block and lead screw locking, to reduce the offset of third sliding block and target location.When driving mechanism again
When starting control third sliding block movement, control braking anchor ear expands outwardly, and braking anchor ear is unclamped with lead screw, and lead screw normal rotation waits for
Fixed first sliding block movement.
The brake is arranged by a damping on first guide rail, to reduce the impact in braking process
To the first guide rail down to the influence to third sliding block, reduces shake, improve the scanning quality of scanning device.
In above-mentioned technical proposal, 540 upper end of the second guide rail is sealed with the second cover board 600, on second cover board 600
It is provided with guide groove 630, the direction of guide groove 630 is consistent with the length direction of the first guide rail and the second guide rail, and the third is slided
Block 700 is slidably arranged in by the guide rod 620 on the guide groove 630, is provided guiding for the sliding of third sliding block, is protected simultaneously
It demonstrate,proves third sliding block strictly to move linearly along the length direction of the first guide rail, reduces vertical misalignment amount, it is final to reduce third sliding block
Longitudinal judder, the fluting 610 runs through along its length is opened in 600 center of the second cover board, in 610 liang of the fluting
It is provided with third on side wall and is oriented to groove, is correspondingly arranged on third guide pad on 620 two side of the guide rod, and the third is led
Seal gasket is provided with into groove, the third guide pad is slidably arranged in the seal gasket, is ensured guide rod 620 and is opened
Leakproofness at 610 contact position of slot is avoided hydraulic oil between the second sliding block and the second guide rail interior space end from fluting
In leak out.
Meanwhile 540 outside of the second guide rail is provided with a storage box 530, and an elasticity is provided in the storage box 530
Rolling device, the roll bending 531 is around 533 periphery of the elastic rolling device is located at, in the elastic reaction of elastic rolling device 533
Under power, roll bending 531 remains retracted state, and alignment opening 532,531 free end of the roll bending are provided on the storage box 530
It is connect with 620 end side wall of the guide rod by alignment opening 532, guide rod 620 is by roll bending 531 by being straightened opening 532
It is pulled out after alignment, specifically, the width of the roll bending 531 is more than the width of the fluting 610,531 free end two of the roll bending
Slideslip is arranged in the seal gasket, is sealed by seal gasket and fluting, when the second sliding block forced-slip, driving is led
Bar moves in fluting, and guide rod is with fluting sealed set, the volume that the fluting between guide rod and the second guide rail end is drawn out in real time
Plate seals, to avoid leaking out hydraulic oil between the second sliding block and the second guide rail interior space end from fluting.
First sliding block 330 is provided at both ends with the first touching switch 332, and second sliding block 520 is provided at both ends with
Two touching switch 521, the third sliding block 700 are provided at both ends with third touching switch 710, and 540 end of the second guide rail
Protrusion is provided with an origin switch 640, and 540 tail end of the second guide rail protrusion is provided with a limit switches 360, each described to open
Pass is connect with the controller, and 630 end of guide groove is provided with first baffle 650, and origin switch 640 is arranged in first baffle
On 650,630 tail end of guide groove is provided with second baffle 370, and limit switches 360 are arranged on second baffle 370, touching switch
Activation signal is generated, is sent in controller, controller controls respective slide and stops movement, that is, touching switch for limiting
The shift motion of sliding block avoids sliding block and guide rail end or tail end direct collision, origin switch 640 and limit switches 360 from being used for
The calibration that origin and terminal are carried out to the mobile route of third sliding block, improves the mobile accuracy of antenna, eliminates the tired of shift motion
Count error.
In the present embodiment, it is additionally provided with a fuel tank in each straight-line displacement mechanism, specifically, the fuel tank is arranged described
On half-set, Liang Ge straight-line displacements mechanism shares a mailbox, and each straight-line displacement mechanism is equipped with an oil pump, described
Oil pump inlet is connected to the oil outlet of the fuel tank, and the outlet of the oil pump is entered by the first solenoid valve with the buffer
Mouth connection, the outlet of the buffer is connected to the internal heads of second guide rail 540, is provided on first solenoid valve
First flowmeter is provided with calibration oil return opening at the internal heads of second guide rail 540, and the calibration oil return opening passes through one
Two solenoid valves are connected to the tank drainback mouth, and second flowmeter, each solenoid valve are provided in the second solenoid valve
It is connect respectively with the controller with flowmeter.
It is also equipped with a buffer between calibration oil return opening and second solenoid valve, the hydraulic oil in the first guide rail is through too slow
It after rushing device buffering, is flowed back into the fuel tank by second solenoid valve, buffer reduces second solenoid valve and opens moment, hydraulic pressure
Thus the flowing of oil moment impact caused by oil mass in the first guide rail further reduces the second sliding block so that being mounted on third
The shake of scanning device on sliding block, thus under the premise of improving scanning device scanning accurately, while reducing scanning device
Shake improves the scanning quality of the entire scanning device on third sliding block, finally improves the imaging of scanning system
Quality.
Controller controls the shift motion of third sliding block, realizes scanning imagery of the antenna to target object, meanwhile, pass through survey
Shift position and the displacement distance of third sliding block are fed back away from module.Accumulative operation, unavoidably will appear position deviation, once
When deviation occur in the position of third sliding block and goal-setting position, for example the position of third sliding block does not reach target location also,
At this point, controller calculates the offset distance of third sliding block, because the longitudinal cross-section product in the second guide rail interior space is certain, you can meter
The deviation volume of the hydraulic oil in the second guide rail interior space is calculated, the action of controller control oil pump opens simultaneously the first solenoid valve,
By the hydraulic oil in fuel tank after buffer buffers, the second guide rail interior space is added to, first flowmeter metering flows into
Hydraulic oil volume, when the hydraulic oil of inflow reaches deviation volume, while control oil pump and the first solenoid valve are closed, and second leads
After the hydraulic oil of rail inner space obtains the hydraulic oil of deviation volume, you can driving the second sliding block linkage third sliding block reaches specified
Target location improve the scanning accuracy of antenna to eliminating offset deviation in time.
Such as the position of third sliding block be more than target location certain distance after, at this point, controller calculate third sliding block it is inclined
Gap is from because the longitudinal cross-section product in the second guide rail interior space is certain, you can calculate the hydraulic pressure in the second guide rail interior space
The deviation volume of oil is opened second solenoid valve, the hydraulic oil in the second guide rail interior space is back in fuel tank, second flowmeter
The hydraulic oil volume for measuring outflow when the hydraulic oil of outflow reaches deviation volume, while controlling second solenoid valve closing, the
After the hydraulic oil outflow of the hydraulic oil deviation volume in two guide rail interior spaces, you can driving the second sliding block linkage third sliding block reaches
The scanning accuracy of antenna is improved to eliminate offset deviation in time in specified target location.
In the present embodiment, host computer communicate through a serial port, is provided with display with the controller on the host computer
Device, controller use 52 microcontrollers, this system to utilize upper computer control system, 42HBS48BL4-TF7 stepper motors and its drive
Dynamic device, ball the linear guide slide unit and 52 microcontrollers have designed and produced a millimeter synthetic aperture radiometer antenna scanning platform.
Using the serial communication between host computer and microcontroller, realize on host computer to the control of scanning system and display, including right
The manipulation of scanning system, the operating parameter for changing scanning system and the current slide unit position of real-time display, easy to operate, intuitive,
Flexibly.
Scanning platform parameter setting procedure is as follows, after serial ports smooth opening, so that it may to change parameter therein, acquiescence ginseng
Number is：Horizontal direction scans 50 points, i.e. n1=50, scanning step 20mm, i.e. l1=20mm；Vertical direction scans 25
Point, i.e. n2=25, scanning step 20mm, i.e. l2=20mm；Often the step residence time is 1s, i.e. t=1s.
It is significant to note that horizontal direction slide unit effective travel is 1000mm, vertical direction slide unit effective travel is
500mm, therefore scanning platform parameter must satisfy n1 × l1≤1000mm, n2 × l2≤500mm, otherwise slide unit will move super
The end is crossed, serious damage is caused to system.Certainly, this system successfully solves the problems, such as this, after serial ports is successfully opened, on
Position chance sends the current scanning platform parameter of 52 microcontroller of instructions query by serial ports, and is shown in interface, while parameter
Its limitation prompt can be also shown according to parameter current below.
In system operation, the position where scanning system slide unit is observed for convenience, it is aobvious to be designed with slide unit real time position
The function of showing, including text importing and image show that the location information that host computer is sent according to microcontroller by serial ports is drawn
T-shape scanning platform schematic diagram, and slide unit position is identified in figure.The method shown by image, slide unit it is real-time
Position, which can understand, intuitively to be shown on host computer.Certainly, can be inaccurate when recognizing image, therefore it is aobvious to be additionally provided with word
The location information shown, in this way, writings and image cooperation display, can clearly confirm slide unit position at this time.
In order to verify the effect of platform of the present invention, using 5mW lasers as testing tool, the setting of 5mW lasers is slided in third
On block, stability when system operation, jitter conditions when slide unit is run are tested.Record setting range ability when slide unit operation
With actual motion distance, the accuracy of system is tested.Finally, system output waveform is tested, this pulse will be sent to subsequently
Radiometer measurement system analyze its accuracy as its standby signal.
Test proves that the shake of third sliding block when system operation is all very small, and the shake of vertical direction is than level
Direction it is also much smaller, illustrate to absorb by hydraulic system, shake very little caused by motor operation, system is very stable.Meanwhile
The setting position of system operation and the error of physical location are almost without it can be seen that system operation accuracy is very high.Often
A line feed pulse signal is generated by 6 test pulse signals, and pulse is often run after a step just stops in slide unit
It sends out, the time of enough gathered datas has been reserved to follow-up test system, including slide unit has just brought into operation in initial value dot system
But also there are one test pulses when going back not running, therefore design complies fully with system requirements.
From the above mentioned, the present invention is realized on host computer using the serial communication between host computer and microcontroller to scanning
The control and display of system include that manipulation to scanning system, the operating parameter for changing scanning system and real-time display are current
Slide unit position optimizes the control process to scanning platform；Meanwhile the present invention has that precision is high, simple to operate, stability
The features such as good, safe, provides necessary platform base for the high precision imaging of millimeter wave synthetic aperture radiometer；Most
Afterwards, slide unit moving process of the invention is more accurate, and eliminates the shake of slide unit, improves image quality.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easy
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of scanning platform for imaging radiometer, which is characterized in that including：
Half-set；
First straight line displacement mechanism is arranged on the horizontal support of the half-set；
Second straight line displacement mechanism is arranged on the longitudinal carrier of the half-set；
Oil pump is connected to the straight-line displacement mechanism and a fuel tank；
Controller connects the straight-line displacement mechanism and oil pump；And
Host computer communicate through a serial port with the controller is provided with display device on the host computer；
The straight-line displacement mechanism includes：
Driving mechanism is connect with the controller；
First guide rail is set as enclosed construction, one and the driving machine is provided with along its length in first guide rail
Structure drives the lead screw of axis connection, and a brake controlled by the controller is provided on the first guide rail tail end lateral wall,
It is provided with a collapsible braking anchor ear on the brake, brake(-holder) block, the system are provided on the braking anchor ear madial wall
Dynamic device is arranged by a damping on first guide rail, and the lead screw tail end protrudes from the outside of the first guide rail tail end
Wall certain distance, and extend in the braking anchor ear；
First sliding block is slidably arranged in first guide rail, and first sliding block is set on the lead screw；
Second guide rail, setting is in first guide rail upper end, second guide rail interior space and the first guide rail interior space
It is connected in end point, second guide rail upper end is covered with a cover board with a fluting；
Second sliding block is slidably arranged in second guide rail, between first sliding block and first guide rail end, with
And hydraulic oil is filled between second sliding block and second guide rail end, second upper end of slide block is from the fluting
Extend upward a guide rod；
Third sliding block is connected to the guide rod upper end, and the third sliding block is slidably arranged on the cover board, the guide rod
On be connected with one for sealing the roll bending of the fluting；And
Range finder module, is arranged the tail end in second guide rail, and the ranging mouth of the range finder module is directed at the third sliding block
Tail end, the output end of the range finder module connect with the controller；
Wherein, the oil pump connects the entrance of a buffer by a solenoid valve, and hydraulic oil is filled in the buffer, described
The longitudinal cross-section product of buffer is accumulated not less than the longitudinal cross-section of second guide rail, and the outlet of the buffer is led with described second
The internal heads space of rail is connected to, and flow meters are provided on the solenoid valve.
2. being used for the scanning platform of imaging radiometer as described in claim 1, which is characterized in that the straight-line displacement mechanism is logical
It crosses a mounting base to be arranged on the half-set, the driving mechanism is stepper motor, and the driving mechanism passes through a connection
Seat is drivingly connected with the lead screw.
3. being used for the scanning platform of imaging radiometer as claimed in claim 2, which is characterized in that the longitudinal direction of first sliding block
Section is consistent with the longitudinal cross-section in first guide rail interior space, and the first guiding is provided on two madial wall of the first guide rail
Groove is correspondingly arranged on the first guide pad on first slider side wall, and first guide pad is slidably arranged in described first
It is oriented in groove, and the end periphery of first sliding block is provided with the first sealing ring.
4. being used for the scanning platform of imaging radiometer as claimed in claim 3, which is characterized in that first center edge
Length direction is through a threaded hole is offered, and first sliding block is located at by the screw thread borehole jack on the lead screw, the spiral shell
Thread seal set is provided between pit and lead screw.
5. being used for the scanning platform of imaging radiometer as claimed in claim 4, which is characterized in that use first guide rail upper end
First cover plate for sealing, first cover board end point offer several through-holes；Second guide rail is arranged in first cover board
Upper end, second guide rail interior space are connected to the first guide rail interior space by the through-hole.
6. being used for the scanning platform of imaging radiometer as claimed in claim 5, which is characterized in that the longitudinal direction of second sliding block
Section is consistent with the longitudinal cross-section in second guide rail interior space, and the second guiding is provided on two madial wall of the second guide rail
Groove is correspondingly arranged on the second guide pad on second slider side wall, and second guide pad is slidably arranged in described second
It is oriented in groove, and the end periphery of second sliding block is provided with the second sealing ring.
7. being used for the scanning platform of imaging radiometer as claimed in claim 6, which is characterized in that use second guide rail upper end
Second cover plate for sealing is provided with guide groove on second cover board, and the third sliding block is slidably arranged in institute by the guide rod
It states on guide groove, the fluting runs through along its length is opened in second cover plate central, is set on two madial walls of the fluting
It is equipped with third and is oriented to groove, third guide pad is correspondingly arranged on the guide rod two side, and the third is oriented in groove and sets
It is equipped with seal gasket, the third guide pad is slidably arranged in the seal gasket.
8. being used for the scanning platform of imaging radiometer as claimed in claim 7, which is characterized in that set on the outside of second guide rail
It is equipped with a storage box, is provided with an elastic rolling device in the storage box, the roll bending is around being located at the elastic rolling device
Periphery, alignment opening is provided on the storage box, and the roll bending free end passes through alignment opening and the guide rod end
Rostral wall connects, and the width of the roll bending is more than the width of the fluting, and roll bending free end both sides are slidably arranged in described
In seal gasket.
9. being used for the scanning platform of imaging radiometer as claimed in claim 8, which is characterized in that first sliding block both ends are set
It is equipped with the first touching switch, second sliding block is provided at both ends with the second touching switch, and the third sliding block is provided at both ends with
Three touching switch, and second guide rail end protrusion is provided with an origin switch, the second guide rail tail end protrusion is provided with
One limit switches, each switch are connect with the controller.
10. being used for the scanning platform of imaging radiometer as claimed in claim 9, which is characterized in that the fuel tank is arranged in institute
It states on half-set, the oil pump inlet is connected to the oil outlet of the fuel tank, and the outlet of the oil pump passes through the first solenoid valve
It is connected to the entrance of the buffer, first flowmeter, the inside end of second guide rail is provided on first solenoid valve
It is provided with calibration oil return opening at head, the calibration oil return opening is connected to by a second solenoid valve with the tank drainback mouth, described
Second flowmeter is provided in second solenoid valve, each solenoid valve and flowmeter are connect with the controller respectively.
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| CN201711483582.3A CN108758189B (en) | 2017-12-29 | 2017-12-29 | Scanning platform for imaging radiometer |
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|---|---|---|---|
| CN201711483582.3A CN108758189B (en) | 2017-12-29 | 2017-12-29 | Scanning platform for imaging radiometer |
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| CN108758189B CN108758189B (en) | 2020-02-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111538000A (en) * | 2020-03-30 | 2020-08-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Bright temperature inversion imaging method for uniform circular array synthetic aperture radiometer |
| CN114002732A (en) * | 2021-11-11 | 2022-02-01 | 佛山市职业病防治所 | Automatic moving device of radiation dose detector |
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| CN108758189B (en) | 2020-02-04 |
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