CN207440189U - Antenna phase center measuring system based on ultra-short baseline - Google Patents
Antenna phase center measuring system based on ultra-short baseline Download PDFInfo
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- CN207440189U CN207440189U CN201721620490.0U CN201721620490U CN207440189U CN 207440189 U CN207440189 U CN 207440189U CN 201721620490 U CN201721620490 U CN 201721620490U CN 207440189 U CN207440189 U CN 207440189U
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Abstract
The utility model is related to a kind of antenna phase center measuring system based on ultra-short baseline, including providing the base station of differential data, providing the calibration reference station of checking parameter and forming observation station group by several observation stations；Signal closed loop is formed between base station, calibration reference station and any observation station；Base station, calibration reference station and each observation station are electrically connected respectively with radio frequency switch；Radio frequency switch is electrically connected with GNSS receiver, and GNS receivers are provided with the rotatable platform rotated by step motor control, antenna to be measured is equipped on the rotatable platform with calculating mechatronics, the observation station top.The utility model measuring system solves outside conventional chamber the problems such as the artificial duplication of labour of opposite calibration method is more, and efficiency is low, has testing efficiency high, and human cost is low, can large scale test the advantages that, it can be achieved that Accurate Calibration to antenna phase center.
Description
Technical field
The utility model is related to a kind of antenna phase center measuring systems based on ultra-short baseline, belong to antenna phase center
Field of measuring technique.
Background technology
With the fast development of Technique of Satellite Navigation and Positioning, requirement of the people to positioning accuracy is higher and higher, depends merely on amplitude
Wave beam has been unable to meet requirement to search for positioning, it is necessary to is accurately positioned or be measured on the basis of the phase center of antenna.My god
The phase center of line can be regarded as the center of curvature of its radiated far field equiphase surface, and general antenna phase center is not fixed
Point, but change with the elevation angle and azimuthal change of satellite.When high accuracy data measures, often with apparent phase
On the basis of center, but during operation, the installation of antenna is on the basis of geometric center, this just generates geometric center and apparent phase
The error at center, and this error will cause measurement and positioning very big influence.Therefore, phase center is carried out to antenna
Calibration is very important, and only carries out the staking-out work of antenna phase center, and the data measured by us could be more accurate.
At present, there are three types of antenna phase center scaling methods, microwave dark room measuring method, outdoor relative calibration method and outdoor are exhausted
To calibration method.Microwave dark room measuring method is handled by fit phase directional diagram, and test method interference is small, and precision is high, from
Influence in terms of outdoor climate, repeatability are high.But microwave dark room needs constantly adjustment aerial position until in phase
It until heart directional diagram is symmetrical, takes time and effort, not easy to operate, calibration error is big.
In terms of measurement accuracy, outdoor absolute calibration method test is more accurate.The equipment of use is accurate robot, real
Existing is automatic measurement, without manual operation, substantially reduces the error that people brings in operation to a certain extent.
Although precision machinery people can make calibration result very accurate, its cost is very expensive, it is technical require it is very high.
Traditional outdoor relative calibration method is easy to operate, at low cost, it is easy to accomplish.But in the detection, one has often been surveyed
After period, it is necessary at an angle (generally 90 °) manual rotation antenna to be measured.In this way, a receiver antenna is detected
A working day is at least needed, the artificial duplication of labour is more, and efficiency is low.Therefore, the necessary one kind that proposes is without manual intervention
Antenna phase center automatic measuring system, it is high to improve testing efficiency, and it is low to reduce human cost, and can large scale test.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of testing efficiency height, and human cost is low based on ultrashort base
The antenna phase center measuring system of line.
The utility model is realized using following scheme：A kind of antenna phase center measuring system based on ultra-short baseline, bag
It includes and the base station of differential data is provided, the calibration reference station of checking parameter is provided and forms observation station by several observation stations
Group；Signal closed loop is formed between base station, calibration reference station and any observation station；Base station, calibration reference station and each
Observation station is electrically connected respectively with radio frequency switch；Radio frequency switch is electrically connected with GNSS receiver, and GNS receivers are electromechanical with calculating
Connection, the observation station top are provided with the rotatable platform rotated by step motor control, install and need on the rotatable platform
Observation line.
Further, the base station and calibration reference station include pedestal and the base station pier being arranged on pedestal, are located at
Base station pier top end is provided with forced centering bar, and forced centering bar upper end is fixed with choke coil antenna, the output terminal of choke coil antenna
Mouthful RF cable is connected with, is provided in the pier of base station with the following wiring channel for wearing RF cable, base station pier lower end side opens up
There is the outlet hole being pierced by for RF cable.
Further, the rotatable platform is installed on the observation pier top of observation station, and rotatable platform upper side center is screwed on
There is connecting screw, the antenna to be measured is fixed on connecting screw upper end；The stepper motor is installed on observation pier inner top, observation
The cable tray of the controlling cable with the following output cord for wearing antenna to be measured and stepper motor, observation pier lower end are provided in pier
Side offers line outlet.
Compared with prior art, the utility model has the advantages that：The utility model measuring system solves biography
The problems such as the outdoor relative calibration legal person's work duplication of labour of system is more, and efficiency is low have testing efficiency high, and human cost is low, can advise greatly
The advantages that mould is tested is, it can be achieved that Accurate Calibration to antenna phase center.
For the purpose of this utility model, technical solution and advantage is more clearly understood, specific embodiment will be passed through below
And relevant drawings, the utility model is described in further detail.
Description of the drawings
Fig. 1 is the utility model embodiment system schematic；
Fig. 2 is base station or calibration reference station organigram in the embodiment of the present invention；
Fig. 3 is observation station organigram in the embodiment of the present invention；
Fig. 4 is step motor control flow chart in the embodiment of the present invention；
Fig. 5 is antenna direction of rotation to be measured and position view in the embodiment of the present invention；
Figure label explanation：100- base stations, 110- pedestals, 120- base stations pier, 130- forced centerings bar, 140- choke coils
Antenna, 150- wiring channels, 160- outlet holes, 200- calibration references station, 300- observation stations group, 310- observation stations, 311- are to be measured
Antenna, 312- connecting screws, 313- rotatable platforms, 314- stepper motors, 315- observation piers, 316- cable tray, 317- outlets
Mouth, 400- radio frequencies switch, 500-GNSS receivers.
Specific embodiment
As shown in Fig. 1 ~ 5, a kind of antenna phase center measuring system based on ultra-short baseline, including providing differential data
Base station 100, provide checking parameter calibration reference station 200 and form observation station group 300, school by several observation stations 310
It tests base station 200 and checking parameter is provided, eliminate the first reference station and abnormal situation occur；Base station 100, calibration reference station 200
Signal closed loop is formed between any observation station 310；Base station 100, calibration reference station 200 and each observation station 310 divide
It is not electrically connected with radio frequency switch 400；Radio frequency switch 400 is electrically connected with GNSS receiver 500, and GNS receivers 500 are with calculating
Mechatronics, 310 top of observation station are provided with the rotatable platform 313 that rotation is controlled by stepper motor 314, and described rotate is put down
Antenna 311 to be measured is installed on platform 131；Choke coil antenna measurement passage maintains a normally open shape during the test on the base station
State, antenna measurement passage to be measured then opens and closes successively according to the time of setting on observation station, is controlled by computer program
Stepper motor rotates antenna to be measured, while records, stores all detection data, until detection is completed, it is recorded to pass through
Baseline length and Phase center variation value is calculated in Computer reprocessing software, for solving opposite calibration method people outside conventional chamber
The problems such as the work duplication of labour is more, and efficiency is low, have that testing efficiency is high, and human cost is low, can large scale test the advantages that, it can be achieved that
To the Accurate Calibration of antenna phase center.
In the present embodiment, the observation station in the observation station group is in that yi word pattern is regularly arranged or Z-shaped arranges, arrangement
Mode can be combined.
In the present embodiment, stepper motor is controlled by electric machine control system, and electric machine control system is by computer, stepper motor
Driver, stepper motor and serial line interface cable are formed, and computer is connected by serial line interface cable with stepper motor, utilizes system
System control program, realizes automation control.
In the present embodiment, the base station 100 and calibration reference station 200 include pedestal 110 and are arranged on pedestal
Base station pier 120, pier 120 top in base station is provided with forced centering bar 130,130 upper end of forced centering bar is fixed with chokes
Antenna 140 is enclosed, the output port of choke coil antenna 140 is connected with RF cable, is provided in the pier of base station and wears radio frequency line with following
The wiring channel 150 of cable, base station pier lower end side offer the outlet hole 160 being pierced by for RF cable.
In the present embodiment, the rotatable platform 313 is installed on 315 top of observation pier of observation station 310, rotatable platform
313 upper side centers are screwed with connecting screw 312, and the antenna 311 to be measured is fixed on 312 upper end of connecting screw；The stepping
Motor 314 is installed on 315 inner top of observation pier, and censor key is opened, and controls antenna using computer running control software, presses
According to the requirement of antenna detection in specification, antenna is rotated to different positions, completes the multi-period Detection task of antenna, stepping electricity
Machine drives rotatable platform to do 0 °, and 90 °, 180 °, 270 ° rotate successively, and after test, rotatable platform is restored to home position；It sees
It surveys in pier 315 and is provided with the cable tray 316 of the controlling cable with the following output cord for wearing antenna to be measured and stepper motor, see
It surveys pier lower end side and offers line outlet 317.
The course of work of the utility model measuring system：Choke coil antenna and antenna to be measured are respectively disposed on base during detection
On quasi- station and observation station, antenna to be measured refers to northern orientation mark and is directed toward due north, accurately centering, leveling；It is treated with radio-frequency cable connection
Observation line and GNSS receiver set 5 °, sampling interval 5s, first of elevation mask to survey all antennas in section and all refer to north, see
Survey a period（No less than 1 it is small when）；Fixed choke coil antenna is motionless, and antenna to be measured is rotated by 90 ° successively, 180 °, 270 °, often
1 period is observed under kind state, the baseline coordinate difference of each period is finally obtained, as shown in figure 5, A is choke coil day in Fig. 5
Line, B are antenna to be measured；Day part basic lineal vector is obtained respectively using static Baselines software, take baseline length maximum with
Phase center point of the 1/2 of the difference of minimum value as antenna.
After antenna measurement to be measured, prepass that censor key is then closed opens simultaneously next secondary TCH test channel, weight
Multiple above-mentioned steps, until all detection finishes all antennas to be measured.
Above-listed preferred embodiment has been further described the purpose of this utility model, technical solution and advantage,
It should be understood that the above is only the preferred embodiment of the utility model only, it is not intended to limit the utility model, it is all
Within the spirit and principles of the present invention, any modifications, equivalent replacements and improvements are made should be included in this practicality
Within new protection domain.
Claims (3)
1. a kind of antenna phase center measuring system based on ultra-short baseline, it is characterised in that：Base including providing differential data
Quasi- station provides the calibration reference station of checking parameter and forms observation station group by several observation stations；Base station, calibration reference station
Signal closed loop is formed between any observation station；Base station, calibration reference station and each observation station switch respectively with radio frequency
Device is electrically connected；Radio frequency switch is electrically connected with GNSS receiver, and GNS receivers are with calculating mechatronics, the observation station top
The rotatable platform rotated by step motor control is provided with, antenna to be measured is installed on the rotatable platform.
2. the antenna phase center measuring system according to claim 1 based on ultra-short baseline, it is characterised in that：The base
Quasi- station and calibration reference station include pedestal and the base station pier being arranged on pedestal, and base station pier top end is provided with forced centering
Bar, forced centering bar upper end are fixed with choke coil antenna, and the output port of choke coil antenna is connected with RF cable, in the pier of base station
It is provided with the following wiring channel for wearing RF cable, base station pier lower end side offers the outlet hole being pierced by for RF cable.
3. the antenna phase center measuring system according to claim 1 based on ultra-short baseline, it is characterised in that：Described turn
Moving platform is installed on the observation pier top of observation station, and rotatable platform upper side center is screwed with connecting screw, the antenna to be measured
It is fixed on connecting screw upper end；The stepper motor is installed on observation pier inner top, be provided in observation pier with it is following wear it is to be measured
The cable tray of the output cord of antenna and the controlling cable of stepper motor, observation pier lower end side offer line outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721620490.0U CN207440189U (en) | 2017-11-29 | 2017-11-29 | Antenna phase center measuring system based on ultra-short baseline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721620490.0U CN207440189U (en) | 2017-11-29 | 2017-11-29 | Antenna phase center measuring system based on ultra-short baseline |
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| CN207440189U true CN207440189U (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721620490.0U Active CN207440189U (en) | 2017-11-29 | 2017-11-29 | Antenna phase center measuring system based on ultra-short baseline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110049156A (en) * | 2019-04-16 | 2019-07-23 | 中国电建集团西北勘测设计研究院有限公司 | A kind of portable difference location navigation engineering survey mobile phone |
| EP3627160A1 (en) * | 2018-09-18 | 2020-03-25 | Rohde & Schwarz GmbH & Co. KG | Method and measurement system for over-the-air measurements |
-
2017
- 2017-11-29 CN CN201721620490.0U patent/CN207440189U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3627160A1 (en) * | 2018-09-18 | 2020-03-25 | Rohde & Schwarz GmbH & Co. KG | Method and measurement system for over-the-air measurements |
| US11175326B2 (en) | 2018-09-18 | 2021-11-16 | Rohde & Schwarz Gmbh & Co. Kg | Method and measurement system for over-the-air measurements |
| CN110049156A (en) * | 2019-04-16 | 2019-07-23 | 中国电建集团西北勘测设计研究院有限公司 | A kind of portable difference location navigation engineering survey mobile phone |
| CN110049156B (en) * | 2019-04-16 | 2024-02-09 | 中国电建集团西北勘测设计研究院有限公司 | Portable differential positioning navigation engineering survey mobile phone |
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Effective date of registration: 20180803 Address after: 350001 Room 1-410, Physics Building, Yishan Campus, Fuzhou University, 523 Industrial Road, Gulou District, Fuzhou City, Fujian Province Patentee after: Fuzhou Fuda Xinjie Antenna Technology Co., Ltd. Address before: 350002 room 1-406, physics building, 523 Industrial Road, Gulou District, Fuzhou, Fujian, China, 523 Patentee before: Fujian Fuda Beidou Communication Technology Co., Ltd. |