CN104597841A - System and method for compensating planeness of compact field plane scanning frame - Google Patents
System and method for compensating planeness of compact field plane scanning frame Download PDFInfo
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- CN104597841A CN104597841A CN201410790156.4A CN201410790156A CN104597841A CN 104597841 A CN104597841 A CN 104597841A CN 201410790156 A CN201410790156 A CN 201410790156A CN 104597841 A CN104597841 A CN 104597841A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
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Abstract
The invention discloses system and method for compensating planeness of a compact field plane scanning frame. The system comprises a laser plane emitter for enabling emitted laser beams to form a laser plane by a self-rotating manner, a position-sensitive detector for detecting the position deviation of the laser plane and a zero position at the self-sensing area on real time and sending to a controller, the controller for generating driving current according to the position deviation to drive a servo compensator, and the servo compensator for driving the position-sensitive detector to jointly adjust the position to perform closed-loop control compensation for the planeness error of the scanning frame on real time. According to the technical scheme, the system has the advantages that the closed-loop control strategy is utilized to dynamically compensate the tail end of a scanning surface, and therefore, the problem of planeness error of the scanning plane caused by mechanical deviation due to the influences from mechanical processing, assembling precision, temperature, environmental vibration, gravity and other factors when the compact field plane scanning frame is in a complex environment or the testing cycle is relatively long, can be solved.
Description
Technical field
The present invention relates to a kind of real-time planar degree bucking-out system.More specifically, a kind of flatness bucking-out system and method for Compact Range flat scanning frame is related to.
Background technology
The flatness of the plane microwave that Compact Range is formed evaluates an important indicator of Compact Range performance, and Compact Range flat scanning frame is the specialized equipment for measuring this index.Along with the development of science and technology, the microwave planar area that Compact Range is formed is increasing, and index is more and more higher, and this has higher requirement with regard to the direct flatness index to the test plane that the scanning of Compact Range flat scanning frame is formed.
The spacescan plane that current Compact Range flat scanning frame generally adopts equipment to be formed through mechanical motion, as test plane, by microwave amplitude and the phase place of each point in point-to-point measurement plane, judges whether Compact Range reaches necessary requirement.Large-scale scanning support many employings metal construction, is subject to the reason generation distortion to a certain degree such as temperature, ambient vibration, gravity, and simple machining and the assembly precision of leaning on is difficult to ensure that it forms the flatness in spacescan face.
The current flatness compensation method mode of semireal time that adopts to flatness more, namely by under dynamic scan state, the actual coordinate value of probe at each sampled point is recorded by laser system, then the VEC by having set up, provide the coordinate modification value (or offset) of each point, then set up complete error correction table.When carrying out microwave planar degree index measurement, the errors table that real-time calling has stored, revises in real time to the coordinate of place anchor point.But, circumstance complication comparatively large for size or test process cycle longer Compact Range flat scanning frame, the actual conditions of scanning support in time or environmental change may with calculating correction chart time state of inscribing there is larger change, said method be difficult to guarantee compensation effect.Thus, for ensureing the accuracy of test result, under this kind of state, need to carry out real-time dynamic compensation to scanning plane flatness error.
Therefore, flatness bucking-out system and method that a kind of Compact Range flat scanning frame is provided is needed.
Summary of the invention
One object of the present invention is the flatness bucking-out system providing a kind of Compact Range flat scanning frame.
Another object of the present invention is the flatness compensation method providing a kind of Compact Range flat scanning frame.
For achieving the above object, the present invention adopts following technical proposals:
A flatness bucking-out system for Compact Range flat scanning frame, this system comprises: laser plane transmitter, Position-Sensitive Detector PSD, controller and servo compensator;
Laser plane transmitter, makes the laser beam formation of transmitting perpendicular to the laser plane tightening flat field microwave propagation direction for utilizing in the mode of self polarized rotation;
Position-Sensitive Detector PSD is arranged on servo compensator, and make the receive direction of the induction zone of Position-Sensitive Detector PSD parallel with laser plane and vertical with the receive direction of scanning support antenna probes, Position-Sensitive Detector PSD is used for detecting the position relationship with laser plane by the induction zone of himself, and the position deviation of generation is sent to controller;
Controller, drives servo compensator for generating drive current according to position deviation;
Servo compensator to be arranged on scanning support cantilever and link position sensing detector PSD and scanning support antenna probes, for driving Position-Sensitive Detector PSD and scanning support antenna probes to be synchronized with the movement, completing and the closed-loop control of scanning Compact Range flat scanning frame flatness is compensated.
Preferably, controller comprises: industrial computer, motion control device and output control device;
Industrial computer, for receiving position deviation, generates steering order according to position deviation and steering order is sent to motion control device;
Motion control device, for generating control signal according to steering order and this signal being sent to output control device;
Output control device, drives servo compensator for generating drive current according to control signal.
Preferably, servo compensator comprises: antenna polarization device and feeding compensation device;
Antenna polarization device to be arranged on feeding compensation device and link position sensing detector PSD and scanning support antenna probes, the direction synchronous polarization rotation of described laser plane is being parallel to for driving Position-Sensitive Detector PSD and scanning support antenna probes, avoid because Position-Sensitive Detector PSD follows the rotation of Compact Range flat scanning frame and cause laser beam to be blocked, sensing detector PSD induction zone can not receive the problem of laser plane;
Feeding compensation device, for driving antenna polarization device, Position-Sensitive Detector PSD and scanning support antenna probes at the direction rectilinear motion perpendicular to described laser plane.
Preferably, servo compensator also comprises: fittable slackening device, supports for forming omnidirectional to servo compensator.
As a flatness compensation method for the Compact Range flat scanning frame of system above, the method comprises the steps:
S1, laser plane transmitter is made polarized rotation, the laser beam making it launch forms laser plane;
The position of S2, adjustment laser plane transmitter and emission angle, make its polarized rotation with Compact Range microwave propagation direction for axle, and the laser plane making it produce is vertical with Compact Range microwave propagation direction;
S3, the position adjusting the Position-Sensitive Detector PSD be arranged on servo compensator and receiving angle, make the receive direction of Position-Sensitive Detector PSD induction zone parallel with laser plane and vertical with the receive direction of scanning support antenna probes, and make induction zone energy real-time reception to laser plane;
S4, utilize Position-Sensitive Detector PSD induction zone detect in real time by the built-in optical imaging system of Position-Sensitive Detector PSD and generate position deviation, and position deviation is sent to controller;
S5, utilize controller to generate drive current according to described position deviation to drive servo compensator;
S6, utilize servo compensator to drive Position-Sensitive Detector PSD and scanning support antenna probes to be synchronized with the movement, complete and the closed-loop control of scanning Compact Range flat scanning frame flatness is compensated.
Preferably, step S5 comprises following sub-step further:
Utilize industrial computer receiving position deviation, generate steering order according to position deviation and steering order is sent to motion control device;
Motion control device is utilized to generate control signal according to steering order and this signal is sent to output control device;
Utilize output control device to generate drive current according to control signal and drive servo compensator.
Preferably, step S6 comprises following sub-step further:
Antenna polarization device is utilized to drive Position-Sensitive Detector PSD and scanning support antenna probes being parallel to the direction synchronous polarization rotation of described laser plane;
Feeding compensation device is utilized to drive Position-Sensitive Detector PSD, antenna polarization device and scanning support antenna probes in the direction synchronous linear motion perpendicular to described laser plane.
Beneficial effect of the present invention is as follows:
The object of the invention is to solve Compact Range flat scanning frame be operated in circumstance complication or the test process cycle longer when, by machining, the factor impacts such as assembly precision, temperature, ambient vibration, gravity cause mechanical deformation, and the plane of scanning motion caused exists the problem of flatness error.Technical scheme of the present invention, because it adopts Closed-loop Control Strategy, carries out dynamic compensation to scanning plane end, can eliminate the flatness error problem that mechanical deformation etc. causes.Simultaneously by the laser plane transmitter described in invention and Position-Sensitive Detector PSD, directly can also measure the position deviation of Position-Sensitive Detector PSD and laser plane in real time, and avoid the error of calculation because indirect inspection brings.By practical application measurement data, after using technical solutions according to the invention to compensate, the scanning plane flatness error of Compact Range flat scanning frame can ensure within 0.05mm.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates the flatness bucking-out system composition diagram of Compact Range flat scanning frame.
Fig. 2 illustrates the induction zone relation schematic diagram of laser plane and Position-Sensitive Detector PSD.
Fig. 3 illustrates Position-Sensitive Detector PSD schematic diagram.
Fig. 4 illustrates servo compensator schematic diagram in the flatness bucking-out system of Compact Range flat scanning frame.
Fig. 5 illustrates the flatness bucking-out system signal flow graph of Compact Range flat scanning frame.
Fig. 6 illustrates the flatness compensation method process flow diagram of Compact Range flat scanning frame.
Embodiment
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
As shown in Figure 1, the flatness bucking-out system of the Compact Range flat scanning frame that the present embodiment provides comprises laser plane transmitter 1, Position-Sensitive Detector PSD2, controller 3 and servo compensator 4, its annexation and working method as follows:
Laser plane transmitter 1 fixes on the ground, and it is rotated by self and makes the laser beam of launching produce a laser plane 5, using this laser plane 5 as a reference plane.
As shown in Figure 2, microwave reflection face 14 microwave reflection 9 to scanning support, and direction is invariable.By angle and the position of adjustment laser plane transmitter 1, the laser plane 5 making it produce is parallel with microwave reflection face 14, namely laser plane 5 is vertical with microwave arrival bearing, scanning support antenna probes 7 receives the microwave of vertical sand shooting, ideally scanning support antenna probes 7 moves in the space plane parallel with microwave reflection face 14, receives the microwave of vertical sand shooting.
Servo compensator 4 is arranged on the line slideway of the spiral arm of scanning support 6, and when scanning support 6 normally works, spiral arm rotates, and drives servo compensator 4 to move together.Meanwhile, servo compensator 4 can do rectilinear motion along the line slideway of the spiral arm of scanning support 6.Therefore, servo compensator 4 can arrive any point that scanning support scans out plane.Scanning support antenna probes 7 is fixed on servo compensator 4, and according to testing requirement, scanning support 6 and servo compensator 4 routing motion, the diverse location driving antenna to arrive in space plane carries out dependence test.
Position-Sensitive Detector PSD2 is fixed on servo compensator 4, regulate servo compensator 4 to make laser plane 5 can be irradiated to the induction zone of Position-Sensitive Detector PSD2 in real time, the induction zone relation of laser plane 5 and Position-Sensitive Detector PSD2 as shown in Figure 2.
As shown in Figure 3, centre position, Position-Sensitive Detector PSD2 induction zone 8 is induction zone zero-bit 10.During laser plane 5 is inswept Position-Sensitive Detector PSD2 induction zone 8, induction zone 8 is detected in real time by the built-in optical imaging system of Position-Sensitive Detector PSD and is generated the irradiation position of laser plane and the distance and position deviation of induction zone zero-bit, if irradiation position is in Position-Sensitive Detector PSD induction zone zero-bit 10, then position deviation is 0, and namely scanning support antenna probes is on the parallel plane of laser plane 5; If irradiation position departs from induction zone zero-bit 10, then the position deviation of Position-Sensitive Detector PSD2 generation, namely scanning support antenna probes current location is apart from the plane-parallel position deviation of laser plane 5.
Position-Sensitive Detector PSD2 by serial communication by antenna when diverse location and the position deviation of laser plane 5 be sent to controller 3 in real time;
Controller 3 comprises: industrial computer, motion control device and output control device.Industrial computer completes the reception that location sensitive detector PSD2 transmits data, and process and steering order export; Motion control device mainly completes the polaxis of servo compensator 4 and the Motion trajectory of straight line compensating shaft, and generates corresponding control signal and pass to output control device; Output control device generates drive current, drives servo compensator 4 to move, and completes flatness and compensates.
Industrial computer serial communication is set to baud rate 19200, no parity check position, 8 data bit, 1 position of rest.
The packet comprising flatness error information that industrial computer is sent out with the communication speed receiving position sensing detector PSD2 of 250ms by serial communication, packet the 9th, 10 comprise position deviation information, set the 9th, 10 bit value are respectively a, b, then physical location deviation analytical Calculation is as follows:
c＝a+b*256
If c≤32767, then position deviation p=c*0.0005;
If c > 32767, then position deviation p=(c-65536) * 0.0005.
After industrial computer receives position deviation, generate steering order according to position deviation and send to motion control device.Motion control device generates control signal and passes to output control device.Output control device generates drive current, drives servo compensator 4 to complete real-Time Compensation.
As shown in Figure 4, servo compensator comprises: antenna polarization device 11, feeding compensation device 12, fittable slackening device 13, wherein scanning support antenna probes 7 and Position-Sensitive Detector PSD2 are installed on antenna polarization device 11, antenna polarization device 11 is arranged on feeding compensation device 12, feeding compensation device 12 is arranged on fittable slackening device 13, fittable slackening device 13 is arranged on scanning support cantilever, antenna polarization device 11 is mainly used in driving Position-Sensitive Detector PSD and scanning support antenna probes being parallel to the direction synchronous polarization rotation of described laser plane, avoid because Position-Sensitive Detector PSD follows the rotation of Compact Range flat scanning frame and cause laser beam to be blocked, sensing detector PSD induction zone can not receive the problem of laser plane, feed compensation module 12 drives antenna polarization device 11, Position-Sensitive Detector PSD2 and scanning support antenna probes 7 at the direction rectilinear motion perpendicular to laser plane 5, carries out flatness compensation, fittable slackening device 13 adopt octagon cylindrical structure coordinate two groups totally four guide rail slide block assemblies omnidirectional formed to servo compensator support.
Position-Sensitive Detector PSD2 is arranged on the antenna polarization device 11 of servo compensator 4, when servo compensator 4 compensates a certain position plane degree error, Position-Sensitive Detector PSD2 can be synchronized with the movement with feed compensation module 12, antenna polarization device 11 and scanning support antenna probes 7, ensures that the relative space position of Position-Sensitive Detector PSD2 and scanning support antenna probes 7 is constant.Along with the carrying out compensated, the position of laser plane 5 is inswept Position-Sensitive Detector PSD2 induction zone levels off to induction zone zero-bit, Position-Sensitive Detector PSD2 passes to the corresponding reduction of position deviation of controller 3, controller 3 controls the corresponding change of position command of servo compensator 4, finally make the flatness of antenna probes place plane meet testing requirement, complete and the real-time closed-loop control of scanning Compact Range flat scanning frame flatness is compensated.
The flatness compensation method of the Compact Range flat scanning frame that the present embodiment provides, comprises the steps:
S1, laser plane transmitter is made polarized rotation, the laser beam making it launch forms laser plane;
The position of S2, adjustment laser plane transmitter and emission angle, make its polarized rotation to tighten flat field microwave propagation direction for axle, and the laser plane making it produce is vertical with Compact Range microwave propagation direction;
S3, the position adjusting the Position-Sensitive Detector PSD be arranged on servo compensator and receiving angle, make the receive direction of Position-Sensitive Detector PSD induction zone parallel with laser plane and vertical with the receive direction of scanning support antenna probes, and make induction zone energy real-time reception to laser plane;
S4, utilize Position-Sensitive Detector PSD induction zone detect in real time by the built-in optical imaging system of Position-Sensitive Detector PSD and generate position deviation, and position deviation is sent to controller;
S5, utilize controller to generate compensating control signal according to position deviation, and compensating control signal is sent to servo compensator, the detailed process of this step is as follows:
Utilize industrial computer receiving position deviation, generate steering order according to position deviation and steering order is sent to motion control device;
Motion control device is utilized to generate control signal according to steering order and this signal is sent to output control device;
Utilize output control device to generate drive current according to control signal and drive servo compensator;
S6, utilize servo compensator to drive Position-Sensitive Detector PSD and scanning support antenna probes to be synchronized with the movement, complete and compensate the closed-loop control of scanning Compact Range flat scanning frame flatness, the detailed process of this step is as follows:
Utilizing antenna polarization device to drive Position-Sensitive Detector PSD and scanning support antenna probes being parallel to the direction synchronous polarization rotation of laser plane, making sensing detector PSD induction zone all can receive laser plane at an arbitrary position;
Utilize feeding compensation device to drive antenna polarization device, Position-Sensitive Detector PSD and scanning support antenna probes at the direction rectilinear motion perpendicular to laser plane, complete and the closed-loop control of scanning Compact Range flat scanning frame flatness is compensated.
In sum, technical scheme of the present invention, the mode of closed-loop control is formed by controller and Compact Range flat scanning frame flatness compensator, effectively can overcome scanning support structure by machining, the factor impacts such as assembly precision, temperature, ambient vibration, gravity cause mechanical deformation, the flatness error problem of the plane of scanning motion caused; Simultaneously, by laser plane transmitter and Position-Sensitive Detector PSD, directly can measure the flatness error of the non-physical plane that Compact Range flat scanning frame scans in real time, ratio is by the mode of the final Calculation Plane degree of indirect measurement systems parameter, decrease the error of measurements and calculations link, reflect System planes degree error level more accurately; And, the present invention adopts Real-time compensation control method, the mode of real-time dynamic compensation flatness error, the advantage of carrying out flatness bucking-out system than the mode of semireal time is: can overcome when Compact Range flat scanning frame is operated in circumstance complication or the test process cycle is longer, scanning frame for compact antenna test range virtual condition with may change before, cause physical plane degree error and early stage by survey calculation to the problem that is not inconsistent of error correction table.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (7)
1. a flatness bucking-out system for Compact Range flat scanning frame, is characterized in that, this system comprises: laser plane transmitter, Position-Sensitive Detector PSD, controller and servo compensator;
Laser plane transmitter, makes the laser beam formation of transmitting perpendicular to the laser plane tightening flat field microwave propagation direction for utilizing in the mode of self polarized rotation;
Position-Sensitive Detector PSD is arranged on servo compensator, and make the receive direction of the induction zone of Position-Sensitive Detector PSD parallel with laser plane and vertical with the receive direction of scanning support antenna probes, Position-Sensitive Detector PSD is used for detecting the position relationship with described laser plane by the induction zone of himself, and the position deviation of generation is sent to controller;
Controller, drives servo compensator for generating drive current according to described position deviation;
Servo compensator to be arranged on scanning support cantilever and link position sensing detector PSD and scanning support antenna probes, for driving Position-Sensitive Detector PSD and scanning support antenna probes to be synchronized with the movement, complete the real-Time Compensation of the flatness to Compact Range flat scanning frame.
2. the flatness bucking-out system of Compact Range flat scanning frame according to claim 1, it is characterized in that, described controller comprises: industrial computer, motion control device and output control device;
Industrial computer, for receiving position deviation, generates steering order according to position deviation and steering order is sent to motion control device;
Motion control device, for generating control signal according to steering order and control signal being sent to output control device;
Output control device, drives servo compensator for generating drive current according to control signal.
3. the flatness bucking-out system of Compact Range flat scanning frame according to claim 1, it is characterized in that, described servo compensator comprises: antenna polarization device and feeding compensation device;
Antenna polarization device to be arranged on feeding compensation device and link position sensing detector PSD and scanning support antenna probes, rotates for driving Position-Sensitive Detector PSD and direction synchronous polarization that scanning support antenna probes is being parallel to described laser plane;
Feeding compensation device, for driving antenna polarization device, Position-Sensitive Detector PSD and scanning support antenna probes in the direction synchronous linear motion perpendicular to described laser plane.
4. Compact Range flat scanning frame flatness bucking-out system according to claim 3, it is characterized in that, described servo compensator also comprises: fittable slackening device, supports for forming omnidirectional to described servo compensator.
5. the flatness compensation method of the Compact Range flat scanning frame of system as described in any one of claim 1-4, it is characterized in that, the method comprises the steps:
S1, laser plane transmitter is made polarized rotation, the laser beam making it launch forms laser plane;
The position of S2, adjustment laser plane transmitter and emission angle, make its polarized rotation to tighten flat field microwave propagation direction for axle, and the laser plane making it produce is vertical with Compact Range microwave propagation direction;
S3, the position adjusting the Position-Sensitive Detector PSD be arranged on servo compensator and receiving angle, make the receive direction of described Position-Sensitive Detector PSD induction zone parallel with laser plane and vertical with the receive direction of scanning support antenna probes, and make described induction zone energy real-time reception to described laser plane;
S4, utilize Position-Sensitive Detector PSD induction zone detect in real time by the built-in optical imaging system of Position-Sensitive Detector PSD and generate position deviation, and position deviation is sent to controller;
S5, utilize controller to generate drive current according to described position deviation to drive servo compensator;
S6, utilize servo compensator to drive Position-Sensitive Detector PSD and scanning support antenna probes to be synchronized with the movement, complete the real-Time Compensation of the flatness to Compact Range flat scanning frame.
6. the flatness compensation method of Compact Range flat scanning frame according to claim 5, it is characterized in that, described step S5 comprises following sub-step further:
Utilize industrial computer receiving position deviation, generate steering order according to position deviation and steering order is sent to motion control device;
Motion control device is utilized to generate control signal according to steering order and this signal is sent to output control device;
Utilize output control device to generate drive current according to control signal and drive servo compensator.
7. the flatness compensation method of Compact Range flat scanning frame according to claim 5, it is characterized in that, described step S6 comprises following sub-step further:
Antenna polarization device is utilized to drive Position-Sensitive Detector PSD and scanning support antenna probes being parallel to the direction synchronous polarization rotation of described laser plane;
Feeding compensation device is utilized to drive Position-Sensitive Detector PSD, antenna polarization device and scanning support antenna probes in the direction synchronous linear motion perpendicular to described laser plane.
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| CN107884742B (en) * | 2017-11-10 | 2021-10-01 | 中国航空工业集团公司西安飞机设计研究所 | Method for installing high-flatness antenna array of airplane and antenna array installation plate |
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| CN108287968B (en) * | 2018-01-29 | 2021-09-10 | 广东曼克维通信科技有限公司 | Method, device and system for measuring and calculating parallelism of antenna aperture and scanning frame |
| CN108802501A (en) * | 2018-04-19 | 2018-11-13 | 北京无线电计量测试研究所 | A kind of Compact Range scanning means |
| CN108828347A (en) * | 2018-04-24 | 2018-11-16 | 青岛中电绿网新能源有限公司 | Electronic circuit EMI sensitizing range positioning measurment system and locating measurement method based on near-far field transformation algorithm |
| CN108710033A (en) * | 2018-05-27 | 2018-10-26 | 南京艾文森电子科技有限公司 | A kind of low-cost and high-precision small scanning frame and control method |
| CN110879384A (en) * | 2019-12-06 | 2020-03-13 | 江苏南水科技有限公司 | Radar reflecting surface system and leveling method and building method thereof |
| CN110879384B (en) * | 2019-12-06 | 2020-09-18 | 江苏南水科技有限公司 | Radar reflecting surface system and leveling method and building method thereof |
| CN112325808A (en) * | 2020-11-03 | 2021-02-05 | 北京石油化工学院 | Flatness real-time calibration compensation measurement method based on multiple PSDs |
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