CN106771667B - Method for microwave measurement and measuring system based on the rotation of the phase heart - Google Patents
Method for microwave measurement and measuring system based on the rotation of the phase heart Download PDFInfo
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- CN106771667B CN106771667B CN201611245735.6A CN201611245735A CN106771667B CN 106771667 B CN106771667 B CN 106771667B CN 201611245735 A CN201611245735 A CN 201611245735A CN 106771667 B CN106771667 B CN 106771667B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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Abstract
The present invention provides a kind of method for microwave measurement based on the rotation of the phase heart, is included in above tested radiating horn and places rotating device, and the distal end setting microwave antenna of rotating device cantilever is arranged in；The rotation center line position for adjusting rotating device is located at the phase heart of tested radiating horn on the rotation centerline of rotating device；Microwave antenna is adjusted, is allowed to be directed at the phase heart of tested radiating horn；While rotating device rotates, microwave antenna receives the microwave signal of tested radiating horn, carries out continuous or stepping measurement.The present invention establishes measuring system by rocker arm from structure and is associated with the radiation phase heart, it ensure that the center of rocker arm rotation is directed at the phase heart by laser centering device, measuring device is realized to the fine sight of the radiating system phase heart, and it ensure that measuring device is directed toward the radiation phase heart always in rocker arm rotation, solves the problems, such as that traditional measurement method can not accurately find the phase heart accurately.
Description
Technical field
The invention belongs to field of machinery automation and the field High-Power Microwave (HPM), have invented a set of based on the rotation of the phase heart
Method for microwave measurement and measuring system.
Background technique
In High-Power Microwave (HPM) technical research, the power in the source HPM is one of the main indicator for evaluating the source HPM performance,
Since HPM has the characteristics that peak power is high, pulse is short, pulse or train of pulse, many conventional microwave power measurement methods exist
It cannot directly be used in High-Power Microwave power measurement.The power measurement in the source HPM generally uses online coupling measurement method, spoke at present
Penetrate power density integration method and a calorimeter method, radiation field power density integration method be by radiation field power density distribution into
Row measurement, then integrates the method for obtaining High-Power Microwave source power, is widely recognized as and is used by domestic and international many research institutions.
When measuring using radiation field power density integration method, need to measure the power density of each point, integral in radiation field
The radiant power of microwave source can be obtained, system is constituted shown in schematic diagram Fig. 1.Radiation field measurement system is placed on measurement bracket
On, receiving antenna vertical height is consistent with radiating horn height, obtains microwave source radiant power by repeatedly measuring.If
The source HPM is unstable, then also needs the relative value that a measurement loudspeaker are fixed, measure with determination each time.To shown in the following figure
Measuring system, total radiation power calculates by following formula:
Wherein, AiIt is the billiard table lateral area between i-th, i+1 measuring point；Ai=2 π R2(cosθi-cosθi+1)。SiIt is i-th
Power density at measuring point, θiFor the angle between i-th of measuring point and radiating horn axis.
Actual measurement process are as follows: (1) determine 1 phase heart position of radiating horn；(2) by Antenna Far Field calculation formula 2D2/ λ with
And test site situation, determine 2 Xiang Xinyu feed phase heart distance R of receiving antenna；(3) receiving antenna is set up, receiving antenna height is made
Degree is consistent with radiating horn height；(4) the HPM measuring appliance such as connecting cable 3, directional coupler, attenuator 4, wave detector 5
Part completes the connection of measuring system；(5) adjustment, which receives bell mouth surface, makes it be directed toward the radiating horn phase heart, makes to receive the loudspeaker phase heart
It is R with radiating horn phase heart distance.Start to measure, the every work in the source HPM is primary, and data collection system acquires signal waveform, manually
It reads simultaneously tracer signal amplitude and receives the angle information θ of loudspeakeri, after having recorded this group of data, artificial mobile reception loudspeaker
To the next position；(6) step (5) are repeated until completing the test of all positions.The data of record are carried out according to nominal data
Processing, and HPM source radiation general power is calculated according to above formula.
As the above measurement process it is found that main problem existing for this method is at present:
(1) radiation field measurement is completed based on the integral to radiation spherical wave, and the center of spherical wave is radiating horn
The phase heart, however in existing radiation field measurement method, measuring system is to separate with radiating system, without physical connection, because
This, not can guarantee measuring system and be in alignment with the radiation phase heart；
(2) due to can not accurately determine the phase heart, in existing radiation field measurement, test point is surveyed with respect to the position of the phase heart
All there is biggish deviation in the direction of test system, measurement result is caused to have biggish error；
(3) in order to which the directional diagram distribution for obtaining radiation and integral obtain power, need to test the power density of difference, so
And existing test method generallys use the mode of manpower to move, and not can guarantee repeatable accuracy, while efficiency is very low；
(4) existing radiation field measurement system is located in strong electromagnetic radiation environment, the received loudspeaker of microwave signal, orientation coupling
It after clutch, needs by one section of microwave cable, into attenuator and wave detector, converts vision signal for microwave signal, then into
The acquisition of row data；The presence of microwave cable results in measuring system with biggish uncertainty of measurement.
Summary of the invention
For the deficiency that current high power microwave radiation field measurement occurs, the present invention provides a kind of based on the rotation of the phase heart
Rocker-arm method for microwave measurement and measuring system.
The technical solution of the invention is as follows provides a kind of method for microwave measurement based on the rotation of the phase heart: including following step
It is rapid:
1) rotating device is placed above tested radiating horn, the distal end that the cantilever of rotating device is arranged in is provided with microwave
Receiving antenna；
2) the rotation center line position for adjusting rotating device makes the phase heart of tested radiating horn be located at the rotation of rotating device
On center line；Microwave antenna is adjusted, is allowed to be directed at the phase heart of tested radiating horn；
3) while rotating device rotates, microwave antenna receives the microwave signal of tested radiating horn, carries out continuous
Or stepping measurement.
The present invention also provides a kind of microwave measurement systems based on the rotation of the phase heart, are characterized in that including based on phase
The rocker-arm mechanical automation measuring device and microwave measurement acquisition device of heart rotation；
The above-mentioned rocker-arm mechanical automation measuring device based on the rotation of the phase heart includes platform module, rotation to heart mould
Block and rocker arm module；
Above-mentioned rotation includes electronically controlled rotary table, the automatically controlled slide unit of XY axis, laser to feeling concerned about system, control unit to core module；
Above-mentioned electronically controlled rotary table is fixed on the upper slide unit face of the automatically controlled slide unit of XY axis；
The pedestal of the above-mentioned automatically controlled slide unit of XY axis is fixed in platform module；
Above-mentioned laser includes laser beam emitting device and laser receiver to system is felt concerned about；
The automatically controlled slide unit of above-mentioned control unit control control XY axis carries out position scanning, until laser receive to retract receive it is sharp
The signal of light emitting devices；
Above-mentioned laser beam emitting device is fixed below electronically controlled rotary table and laser direction and electronically controlled rotary table centre of gyration weight
It closes；
Above-mentioned tested radiating horn is located at below platform module, and laser receiver is fixed on tested radiating horn phase
Right above the heart, guarantee the line of reception device center line and the phase heart perpendicular to horizontal plane；
Above-mentioned carbon fiber rocker arm module includes carbon fiber hollow legn body, antenna mounting platform, rocker arm bearer, above-mentioned carbon fiber
One end of dimension hollow legn body is fixed in electronically controlled rotary table by rocker arm bearer；Above-mentioned antenna mounting platform is set to the carbon
The other end of fiber hollow legn body；
Above-mentioned microwave measurement acquisition device includes microwave antenna, and above-mentioned microwave antenna is fixed on the antenna branch
It supports on platform.
In order to balance the weight of forearm and tense entire arm body, above-mentioned carbon fiber rocker arm module further includes weight set and oblique pull
Rope group；Above-mentioned carbon fiber arm body, antenna mounting platform, weight set, oblique rope group constitute tower crane system, and frame is in rocker arm bearer
On；
Preferably, above-mentioned microwave measurement acquisition device include microwave antenna, directional coupler, attenuator, wave detector,
It is electromagnetically shielded cylinder, vision cable, local measurement oscillograph, monitoring computer；Above-mentioned microwave antenna is fixed on antenna mounting
On platform；
Above-mentioned directional coupler is fixed on microwave antenna rear end, output end successively with above-mentioned attenuator, wave detector
Connection；Above-mentioned attenuator, wave detector are fixed in electromagnetic shielding cylinder；The vision signal of above-mentioned wave detector output is worn through vision cable
It crosses to come out from rocker arm bearer behind carbon fiber arm body inside and be connect with the local measurement oscillograph for being placed on platform module.
In order to verify the direction of receiving antenna, above-mentioned microwave measurement acquisition device further includes that dress is examined in laser aiming fine tuning
It sets, the collimator that verifying attachment includes adjustable laser transmitter, passes through for laser, above-mentioned collimator are finely tuned in above-mentioned laser aiming
Central through hole it is parallel with microwave antenna axis；Above-mentioned adjustable laser transmitter and collimator are arranged in microwave antenna
It goes up and is directed toward the tested radiating horn phase heart.
In order to realize the measurement of different distance, above-mentioned carbon fiber arm body include it is multiple can any grafting dismounting pipe nipple.
Reflection for arm body to HPM, above-mentioned carbon fiber arm external bonding absorbing material.
Preferably, above-mentioned platform module is gantry structure, is assembled by industrial aluminum profile, is placed in ground, and
It is mutually square in the heart to be erected at tested radiating horn.
Preferably, above-mentioned rocker arm module is carbon fibre material.
Advantages of the present invention:
1, the present invention establishes measuring system by rocker arm from structure and is associated with the phase heart is radiated, by laser to heart dress
The center alignment phase heart that ensure that rocker arm rotation is set, realizes measuring device to the fine sight of the radiating system phase heart, and guarantee
Measuring device is directed toward always in rocker arm rotation radiates the phase heart, and to solve traditional measurement method can not accurately find asking for the phase heart accurately
Topic；
2, it is based on automatically controlled turntable, the automation rotation of rocker arm is realized, ensure that angle measurement accuracy and different location point
Repeatable accuracy improves measurement accuracy, and greatly improves conventional efficient；
It 3, can be by attenuator and wave detector without microwave electricity by the measuring device with shielding construction being located on rocker arm
Cable is directly connected to the rear end of directional coupler, avoids microwave cable and measures bring uncertainty to HPM, solves simultaneously
Electromagnetic interference problem of the HPM to attenuator and wave detector.
4, the carbon fiber rocker arm module used is hollow carbon fiber arm body, and light weight, structural strength are high, can any grafting
Dismounting, realizes the rapid survey of different distance；
Detailed description of the invention
Fig. 1 is that radiation field power density integration method measuring system constitutes schematic diagram
The rocker-arm microwave measurement system schematic diagram that Fig. 2 is rotated based on the phase heart；
The existing microwave measurement acquisition device of Fig. 3；
Fig. 4 microwave measurement acquisition device of the present invention；
Fig. 5 rocker arm module diagram；
Fig. 6 is rotated to core module schematic diagram；
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described.
For the deficiency that current high power microwave radiation field measurement occurs, the invention proposes a kind of based on the rotation of the phase heart
Rocker-arm High-Power Microwave automatic measuring system, the system include two large divisions: (a), microwave measurement acquisition device 25, by connecing
Receive antenna horn, directional coupler, microwave cable, attenuator, wave detector, electromagnetic shielding cylinder, SMA-KJ type radio frequency adapter, sheet
The compositions such as ground measuring oscilloscope, monitoring computer.(b), the rocker-arm mechanical automation measuring device based on the rotation of the phase heart, by shaking
Arm module 24, rotation form core module 23, control module and platform supporting module 22 etc., as shown in Figure 2.Carbon fiber rocker arm mould
Block is used to carry receiving antenna and its radio-frequency cable, which ensure that the requirement of the measurement accuracy and repeatable accuracy of directional diagram；
Control module realizes the automation of measurement process, improves conventional efficient, rotation is to core module for being directed at radiating horn phase
The heart, it is ensured that each test point receiving antenna mouth face is directed to the feed phase heart；Platform module provides structural for whole system
Support, height is adjustable, and has the advantages that fast demountable, suitable for different experimental sites.
Usual existing microwave receiving device uses structure as shown in Figure 3, and receiving antenna rear end is picked out by directional coupler
Microwave cable, connects attenuator and wave detector in private mask box, and output low frequency signal recycles oscillograph reading is every to examine all the way
Wave voltage, including receiving antenna 31, directional coupler 32, microwave cable 33, attenuator 34, wave detector 35, shielding box 36, local
Measuring oscilloscope 37, monitoring computer 38 etc..By using in each connector position cladding copper mesh and production shielded box in experiment
The measures such as body reduce electromagnetic interference, but there are shielding case bodies it is big, copper mesh shielding difference and connectivity between measuring instrument is poor the problems such as.
The present invention has carried out electromagnetic shielding adaptive optimization to existing microwave measurement acquisition device, system compact improves and auxiliary is taken aim at
Quasi- test design, system are as shown in Figure 4, comprising: receiving antenna 41, directional coupler 42, antenna mounting platform 43, waveguide are same
Axis converter 44, attenuator 45, wave detector 46, SMA-KJ type radio frequency adapter 47, electromagnetic shielding cylinder 48, laser aiming fine tuning inspection
Experiment device 49, miniaturization local measurement oscillograph 410, monitoring computer 411 etc..Attenuator 45 and wave detector 46 are without microwave
Cable is directly connected to the rear end of directional coupler 42, and devises a kind of electromagnetic shielding cylinder 48 of miniaturization, and shielding cylinder is straight
Outside attenuator and wave detector, one end is connected and fixed female connector with directional coupler flange, and the other end is arrived through switching and cable connection
It minimizes on local measurement oscillograph.The invention has subtracted the transition connection of microwave cable, avoids microwave cable and measures to HPM
Bring uncertainty solves HPM to the electricity of measuring instrument by using compact-sized, light-weight electromagnetic shielding outer cylinder
Magnetic disturbance problem solves what local oscillograph continuously worked long hours using the local measurement oscillograph of miniaturization, high heat dissipation
Heating problem improves the safety of system.It introduces laser aiming and finely tunes verifying attachment, transmitting and reception above receiving antenna
The parallel laser of antenna axis is radiated at feed medium plate surface, passes through calibration reference 412 caused by laser beam and theoretical base
The deviation of standard 413 is compared, to be finely adjusted to the antenna mounting platform in rocker arm module, to verify the finger of receiving antenna
To the pointing accuracy of antenna and the reduction of levelness caused by the bending of exclusion rocker arm and other structures accumulated error.
Usual existing receiving antenna is mainly mounted on tripod, realizes receiving antenna Level tune using tripod
Adjusted with the height of receiving antenna and the Feed Horn phase heart and being directed toward, using the method that meter ruler circular arc is crossed determine measurement point away from
From all adjustings are all to go to distinguish by artificial experience, and measurement point position precision is low, and especially reception loudspeaker are to the feed phase heart
Pointing accuracy it is lower.Rocker arm module of the invention is the basis that whole equipment realizes automatic measurement function comprising antenna
Support platform 55, arm body 54, rocker arm bearer 52, oblique rope group 53, weight set 51 etc., as shown in Figure 5.Receiving antenna is carried
On antenna mounting platform, structure ensure that receiving antenna waveguide central axes and rocker arm axis Cheng Ping in same perpendicular
Row relationship, then antenna platform is adjusted, so that receiving antenna can the high-precision direction feed phase heart.Arm body uses the carbon fiber of low-density
Dimension enhancing thermoset ting resin composite, with higher than strong high and specific modulus, about one meter of every joint arm body, can arbitrarily grafting tear open
Dress is, it can be achieved that different distance measures.Microwave cable, attenuator, wave detector, low-frequency cable can be in the arm bodies with hollow structure
Installation and cabling can effectively reduce reflection of the arm body to HPM in arm body surface mount absorbing material, reduce arm body and survey to HPM
The influence of amount.Rocker arm fulcrum bearing is the revolution axle center of entire rocker arm, and horizontally-supported effect is played to rocker arm；Counterweight is can to put down
The weight of weighing apparatus forearm, oblique rope group can be played to the tensioning function of entire arm body and to the curved correction of arm body.
Rotation of the invention is to the core that core module and control module are that whole equipment realizes automatic measurement, rotation pair
Core module includes electronically controlled rotary table 61, the automatically controlled slide unit 62 of XY axis, laser to system 63, the composition of control unit 64 is felt concerned about, such as Fig. 6 institute
Show.Control module is mainly made of a tri-axial motion controller, control computer and its software.Firstly, in rocker arm module
Rocker arm bearer be erected on high-precision automatically controlled turntable, make the revolution axle center of automatically controlled turntable and the revolution axle center weight of rocker arm
It closes.Secondly, the automatically controlled slide unit of XY axis is installed below in automatically controlled turntable, by laser to the feedback control for feeling concerned about system, automatically controlled turntable is realized
Axis of rotation and vertical being overlapped of tested 65 Xiang Xindian of radiating horn.On this basis, it controls automatically controlled turntable and drives rocker arm day
Line rotates the Point Measurement, it can be achieved that HPM radiation field high position accuracy, high repeatable accuracy in radiation field, improves experiment effect
Rate.
Platform module is the guarantee that whole equipment realizes automatic measurement function, which can be in different Gao Gong
It is applied under rate microwave source and varying environment, has the advantages that fast demountable.
Claims (9)
1. a kind of method for microwave measurement based on the rotation of the phase heart, it is characterised in that: the following steps are included:
1) rotating device is placed above tested radiating horn, the distal end setting microwave receiving day of rotating device cantilever is set
Line；
2) the rotation center line position for adjusting rotating device makes the phase heart of tested radiating horn be located at the rotation center of rotating device
On line；Microwave antenna is adjusted, is allowed to be directed at the phase heart of tested radiating horn；
3) while rotating device rotates, microwave antenna receives the microwave signal of tested radiating horn, carries out continuous or step
Into measurement.
2. a kind of microwave measurement system based on the rotation of the phase heart, it is characterised in that: the rocker-arm including being rotated based on the phase heart is mechanical
Automatic measurement mechanism and microwave measurement acquisition device；
It is described based on the phase heart rotation rocker-arm mechanical automation measuring device include platform module, rotation to core module with
And rocker arm module；
The rotation includes the automatically controlled slide unit of XY axis, electronically controlled rotary table, laser to feeling concerned about system and control unit to core module；
The pedestal of the automatically controlled slide unit of XY axis is fixed in platform module；
The electronically controlled rotary table is fixed on the upper slide unit face of the automatically controlled slide unit of XY axis；
The laser includes laser beam emitting device and laser receiver to system is felt concerned about；
The laser beam emitting device is fixed below automatically controlled slide unit and laser direction is overlapped with the electronically controlled rotary table centre of gyration；
Described control unit controls the automatically controlled slide unit of XY axis and carries out position scanning, so that laser receiver receives laser beam emitting device
Signal；
Tested radiating horn is located at below the platform module, and laser receiver is fixed on tested radiating horn Xiang Xinzheng
Top guarantees the line of laser receiver center line and the tested radiating horn phase heart perpendicular to horizontal plane；
The rocker arm module includes hollow legn body, antenna mounting platform and rocker arm bearer, and one end of the hollow legn body passes through
Rocker arm bearer is fixed in electronically controlled rotary table；The antenna mounting platform is set to the other end of the hollow legn body；
The microwave measurement acquisition device includes microwave antenna, and it is flat that the microwave antenna is fixed on the antenna mounting
On platform.
3. the microwave measurement system according to claim 2 based on the rotation of the phase heart, it is characterised in that:
The rocker arm module further includes weight set and oblique rope group；
The hollow legn body, antenna mounting platform, weight set, oblique rope group constitute tower crane system, and frame is on rocker arm bearer.
4. the microwave measurement system according to claim 2 based on the rotation of the phase heart, it is characterised in that:
The microwave measurement acquisition device further includes directional coupler, attenuator, wave detector, electromagnetic shielding cylinder, vision cable, puts
Set local measurement oscillograph, the monitoring computer in platform module；
The directional coupler is fixed on microwave antenna rear end, the directional coupler obtain output end successively with the decaying
Device, wave detector connection；The attenuator, wave detector are fixed in electromagnetic shielding cylinder；The vision signal warp of the wave detector output
Vision cable is connect with local measurement oscillograph from rocker arm bearer out after passing through arm body inside.
5. the microwave measurement system according to claim 4 based on the rotation of the phase heart, it is characterised in that: the microwave measurement is adopted
Acquisition means further include laser aiming fine tuning verifying attachment, laser aiming fine tuning verifying attachment include adjustable laser transmitter,
For the collimator that laser passes through, the central through hole of the collimator is parallel with microwave antenna axis；The adjustable laser
Transmitter and collimator are arranged on microwave antenna and are directed toward the tested radiating horn phase heart.
6. according to any microwave measurement system based on the rotation of the phase heart of claim 2 to 5, it is characterised in that:
The platform module is gantry structure, is assembled by industrial aluminum profile, is placed in ground, and is erected at tested spoke
It is mutually square in the heart to penetrate loudspeaker.
7. according to any microwave measurement system based on the rotation of the phase heart of claim 2 to 5, it is characterised in that: further include
It is pasted onto the external absorbing material of rocker arm.
8. according to any microwave measurement system based on the rotation of the phase heart of claim 2 to 5, it is characterised in that: the arm
Body include it is multiple can any grafting dismounting pipe nipple.
9. according to any microwave measurement system based on the rotation of the phase heart of claim 2 to 5, it is characterised in that: described to shake
Arm module is carbon fibre material.
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| CN109282770A (en) * | 2017-07-23 | 2019-01-29 | 北京遥感设备研究所 | A kind of device improving microwave dark room test table stated accuracy |
| CN107765106A (en) * | 2017-11-17 | 2018-03-06 | 中国信息通信研究院 | A kind of probe consistency detection system for Multi probe sphere near field |
| CN111239165B (en) * | 2020-01-22 | 2023-07-21 | 西北核技术研究院 | High-power impulse response testing device for antenna surface material |
| CN113433395B (en) * | 2021-06-09 | 2022-03-25 | 北京大学 | Electromagnetic pulse radiation characteristic measuring device and measuring method thereof |
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