CN106788515B - A kind of intermediate-freuqncy signal switching system and method - Google Patents
A kind of intermediate-freuqncy signal switching system and method Download PDFInfo
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- CN106788515B CN106788515B CN201611238149.9A CN201611238149A CN106788515B CN 106788515 B CN106788515 B CN 106788515B CN 201611238149 A CN201611238149 A CN 201611238149A CN 106788515 B CN106788515 B CN 106788515B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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Abstract
The embodiment of the invention provides a kind of intermediate-freuqncy signal switching system and methods, are applied to radio astronomical telescope, belong to automatic control technology field.The intermediate-freuqncy signal switching system includes: high frequency bin device, immediate frequency cable, observation chamber device and top control module.The high frequency bin device include in the external environment that will be received different-waveband signal down the intermediate-freuqncy signal that each receiver is sent is switched to the first switching module and the first main control module controlled the first switching module that immediate frequency cable transmits to multiple receivers of intermediate-freuqncy signal.The observation chamber device includes multiple observed terminals, and the different IF signal that immediate frequency cable transmits is switched to the second main control module that corresponding observed terminals carry out received second switching module and control the second switching module.The present invention improves the efficiency switched over to intermediate-freuqncy signal and accuracy and reduces its mechanical wear and error rate for human incurring fault, ensure that the stability and safety of system work.
Description
Technical field
The present invention relates to automatic control technology fields, in particular to a kind of intermediate-freuqncy signal switching system and method.
Background technique
Radio telescope is a kind of for receiving and studying the astronomical observation equipment of celestial radio wave.The mirror of radio telescope
Face is usually in paraboloid, and mirror surface is combined towards sky, the mirror back side with bracket.Multiple wave bands are installed in radio telescope
Receiver system, and multiple wave bands are covered, greatly meet the demand of scientific research observation.With the development of science and technology with technology into
Step, it is also higher and higher to automation, the requirement of intelligence degree of astronomical observation system.
Inventor has found under study for action, at present to the switching of the intermediate-freuqncy signal in radio telescope using manual side
Formula generally requires manually to be intervened, and switch speed is slow, mechanical wear is big and is easy to appear man-made fault, equipment damage
Situations such as.In addition, RFI interference can be had by designing unreasonable intermediate-freuqncy signal switching system, it cannot guarantee that well radio is looked in the distance
The stability and safety of mirror.
Summary of the invention
A kind of intermediate-freuqncy signal switching system and method provided by the invention, it is intended to improve the effect switched over to intermediate-freuqncy signal
Rate and accuracy and reduce its mechanical wear and error rate for human incurring fault, ensure that the stability and safety of system work.
In a first aspect, a kind of intermediate-freuqncy signal switching system provided in an embodiment of the present invention, is applied to radio astronomical telescope,
The intermediate-freuqncy signal switching system includes that high frequency bin device, the sight chamber being connected with the high frequency bin device by immediate frequency cable fill
The top control module set and be connected respectively with the high frequency bin device and observation chamber device；
The high frequency bin device includes for by different-waveband signal down in the external environment received to intermediate-freuqncy signal
Multiple receivers, the intermediate-freuqncy signal for sending each receiver is switched to the immediate frequency cable transmits first and cuts
Mold changing block and the control instruction for being sent according to the top control module first switching module is controlled first
Main control module, first main control module are connected with the top control module and the first switching module respectively；
The observation chamber device includes multiple observed terminals for receiving different IF signal, is used for the medium frequency electric
The different IF signal of cable transmission is switched to corresponding observed terminals and carries out received second switching module and for according to institute
State the second main control module that the control instruction of top control module transmission controls second switching module, second master control
Module is connected with the top control module and the second switching module respectively.
Preferably, the top control module by CAN bus respectively with first main control module and the second main control module phase
Even, the operational order that the top control module is used to parse host computer transmission obtains control instruction corresponding with the operational order,
And the control instruction is sent to first main control module and the second main control module.
Preferably, the high frequency bin device further includes connecting respectively with first switching module and the first main control module
Power detection module, the power detection module described are switched to the intermediate-freuqncy signal that the immediate frequency cable is transmitted for detecting
Power, and power detection result is sent to first main control module so that first main control module report to it is described total
Control module.
Preferably, the high frequency bin device further includes the power being connected between first switching module and immediate frequency cable
Protective module, the power protection module are used to be greater than in the power of the first switching module intermediate-freuqncy signal to be transmitted default
Restriction threshold value when, adjust within the power to the restriction threshold value of the intermediate-freuqncy signal.
Preferably, the observation chamber device further includes the frequency spectrum being connected between the immediate frequency cable and the second switching module
Compensating module, the intermediate-freuqncy signal that the frequency spectrum compensation module is used to transmit the immediate frequency cable carry out spectral characteristic compensation, with
Make the intermediate-freuqncy signal linear spectral signal.
Preferably, the observation chamber device further includes the power being connected between the immediate frequency cable and the second switching module
Adjustment module, the power conditioning module is used to adjust the power of the intermediate-freuqncy signal, to match the power of the observed terminals
Range.
Preferably, the power conditioning module includes the balanced amplification amplified for the power to the intermediate-freuqncy signal
Device and the digital adjustable step attenuator decayed for the power to intermediate-freuqncy signal.
Preferably, the observation chamber device further includes Feedback of Power module, and the Feedback of Power module will be in receiving
The power of the observed terminals feedback of frequency signal is sent to second main control module, so that second main control module is to the function
Rate adjustment module is controlled.
Preferably, first switching module and the second switching module are multichannel microwave switching switch.
Second aspect, a kind of intermediate-freuqncy signal switching method provided in an embodiment of the present invention are applied to intermediate-freuqncy signal switching system
System, the intermediate-freuqncy signal switching system includes high frequency bin device, the observation that is connected with the high frequency bin device by immediate frequency cable
Chamber device and the top control module being connected respectively with the high frequency bin device and observation chamber device, the observation chamber device include more
A observed terminals, wherein, the described method includes:
The high frequency bin device by the different-waveband signal down in the external environment received to intermediate-freuqncy signal, and according to
Each intermediate-freuqncy signal is switched to the immediate frequency cable to be transferred to the sight chamber by the control instruction that the top control module is sent
Device；
The control instruction that the observation chamber device is sent according to the top control module, the difference that the immediate frequency cable is transmitted
Intermediate-freuqncy signal is switched to corresponding observed terminals.
In conclusion a kind of intermediate-freuqncy signal switching system provided in an embodiment of the present invention, can be applied to radio astronomy and looks in the distance
Mirror.The intermediate-freuqncy signal switching system includes high frequency bin device, observation chamber device and top control module.In the high frequency bin device
In, the control instruction that the first main control module is sent according to top control module controls the first switching module, the first switching mould
The intermediate-freuqncy signal that receiver is sent can be switched to immediate frequency cable and be transferred to observation chamber device by block.In the observation chamber device
In, the control instruction that the second main control module is sent according to top control module controls the second switching module, the second switching mould
The intermediate-freuqncy signal that immediate frequency cable transmits can be switched to corresponding observed terminals by block.In this way, effectively increase to intermediate-freuqncy signal into
The efficiency and accuracy of row switching, and reduce its mechanical wear and error rate for human incurring fault.
Further, the top control module by CAN bus respectively with first main control module and the second main control module
It is connected, due to the transmission characteristic of CAN bus, further ensures the stability and safety of system work, and effectively weaken
RFI interference in the intermediate-freuqncy signal switching system, meets its limitation to RFI interference.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Currently, generally requiring manually to carry out using manual mode to the switching of the intermediate-freuqncy signal in radio telescope
Situations such as intervention, switch speed is slow, mechanical wear is big and is easy to appear man-made fault, equipment damage.In addition, due to design
Unreasonable intermediate-freuqncy signal switching system can have RFI interference, cannot guarantee the stability and safety of radio telescope well
Property.
In consideration of it, designer of the invention is by long-term exploration and trial and multiple experiment and effort, constantly
Reform and innovation have devised a kind of intermediate-freuqncy signal switching system and method, can preferably improve the above problem.
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore should not be viewed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of composition block diagram for intermediate-freuqncy signal switching system that embodiment of the present invention provides.
Fig. 2 is a kind of connection relationship diagram for intermediate-freuqncy signal switching system that invention embodiment provides.
Fig. 3 is a kind of schematic diagram of the frequency decay parameter for immediate frequency cable that embodiment of the present invention provides.
Fig. 4 is a kind of connection relationship diagram for power conditioning module that embodiment of the present invention provides.
Fig. 5 is a kind of flow diagram for intermediate-freuqncy signal switching method that embodiment of the present invention provides.
Figure acceptance of the bid note is respectively as follows:
Icon: 100- intermediate-freuqncy signal switching system；200- high frequency bin device；300- observes chamber device；400- top control module；
201- receiver；The first switching module of 202-；The first main control module of 203-；204- power detection module；205- power protects mould
Block；301- observed terminals；The second switching module of 302-；The second main control module of 303-；304- frequency spectrum compensation module；305- power tune
Save module；306- Feedback of Power module；3051- equalizer amplifier；3052- number adjustable step attenuator.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
As shown in Figure 1, being a kind of composition block diagram of intermediate-freuqncy signal switching system 100 provided in an embodiment of the present invention.In this
Frequency signal switching system 100 is mainly used in radio astronomical telescope.The intermediate-freuqncy signal switching system 100 may include height
Frequency bin device 200, observation chamber device 300 and top control module 400 etc..Wherein, the high frequency bin device 200 and the sight chamber
It is connected between device 300 by immediate frequency cable, with transmission or the data communication etc. for carrying out signal.The top control module 400 is distinguished
It is electrical connected with the high frequency bin device 200 and the observation chamber device 300, to send control instruction to the high frequency bin device
200 and observation chamber device 300, and then control the high frequency bin device 200 and the observation chamber device 300 and execute and move accordingly
Make, such as intermediate-freuqncy signal is switched over.In addition, the top control module 400 is connected with host computer, the host computer can be with
It is, but is not limited to, server and PC (personal computer, PC) etc..The top control module 400 is used for institute
It states host computer and control instruction corresponding with the operational order is obtained according to the operational order that observation mission is sent, and by the control
Instruction is sent to the high frequency bin device 200 and observation chamber device 300.So, it can be achieved that automation control, can be improved centering
The efficiency and accuracy that frequency signal switches over reduce the incidence and the intermediate-freuqncy signal of its mechanical wear and man-made fault
The service life of switching system 100.
As shown in Fig. 2, being a kind of connection relationship signal of intermediate-freuqncy signal switching system 100 provided in an embodiment of the present invention
Figure.Wherein, the high frequency bin device 200 may include receiver 201, the first switching module 202 and the first main control module
203.First main control module 203 is connected with the top control module 400 and the first switching module 202 respectively, according to
The control instruction that top control module 400 is sent carries out automation control to first switching module 202.
Since different observation missions needs to receive different band signals, the receiver 201 can be it is multiple, be used for
The different-waveband signal in external environment is received, and each band signal mixed down to after intermediate-freuqncy signal and is sent to described first and cuts
Change the mold block 202.For example, observations of pulsar generally uses L-band receiver to be observed；Spectral line observes the spoke issued according to molecule
Ejected wave is long different and selects different band receivers, some selection C-band receivers, the selection X-band receiver also having, also
(such as amino molecule) having selects K-band receiver.
In the present embodiment, the intermediate-freuqncy signal that first main control module 203 is also used to receive is aggregated into described first
Switching module 202.First switching module 202 be used under the control of first main control module 203, after summarizing in
Frequency signal is switched to the immediate frequency cable, and sends it to the observation chamber device 300, to meet different observation requirements.
In the present embodiment, the switching channel number of first switching module 202 is greater than the switching channel number needed, enough to provide
Redundancy, be ready for the subsequent upgrade of the high frequency bin device 200.
In addition, the observation chamber device 300 may include observed terminals 301, the second switching module 302 and the second master control
Module 303.Second main control module 303 is connected with the top control module 400 and the second switching module 302 respectively, with basis
The control instruction that the top control module 400 is sent carries out automation control to second switching module 302.
Since different observation missions needs different observed terminals 301, the observed terminals 301 can be multiple, use
In the different IF signal for receiving the immediate frequency cable transmission.For example, observations of pulsar needs pulsar terminal, spectral line observation is needed
DFB terminal is wanted, Flow Observation needs IDV terminal and VLBI observation to need with VLBI terminal etc..
When second switching module 302 receives the intermediate-freuqncy signal sent by the immediate frequency cable, described second is cut
It changes the mold block 302 to be used under the control of second main control module 303, different intermediate-freuqncy signals is switched to corresponding observation eventually
End 301, to meet different observation requirements.In the present embodiment, the switching channel number of second switching module 302, which is greater than, to be needed
The switching channel number wanted, to provide enough redundancies, the subsequent upgrade for the observation chamber device 300 is ready.
In the present embodiment, in order to efficiently perform switching action, first switching module 202 and the second switching module
302 can be multichannel microwave switching switch.Wherein, the multichannel microwave switching switch can use DOWKEY-581J-
420823A type machinery microwave switch.The machinery microwave switch uses self-locking type switched design, and inside has load matched and signal
Feedback output function is connected, has that insertion loss is small, isolation is high, long service life and steady performance.
In order to guarantee the stability and safety of the work of intermediate-freuqncy signal switching system 100, in the top control module 400
CAN (Controller Area is respectively adopted between first main control module 203 and the second main control module 303
Network, controller local area network) bus is attached.Meanwhile when the intermediate-freuqncy signal switching system 100 designs implementation,
Shielding measure is done to the CAN bus, so that RFI interferes very little.Wherein, the CAN bus is by researching and developing and producing automotive electronics
The famous German BOSCH company exploitation of product, and international standard is eventually become, is most widely used fieldbus in the world
One of.It is widely used in the fields such as industrial automation, ship, Medical Devices and industrial equipment.The CAN bus with
General common bus is compared at present, has many advantages, such as communication reliability, real-time and flexibility.In addition, total based on the CAN
The communication mode of line can support distributed and real-time control, can be realized whole network broadcast transmission information.And the CAN bus
In each node line or can disconnect at any time, so as to realize that hot plug and multistation receive etc..
In the present embodiment, the top control module 400, the first main control module 203 and the second main control module 303 can be one kind
IC chip, the ability with signal processing.Its mainly include central processing unit (Central Processing Unit,
Abbreviation CPU) and network processing unit (Network Processor, abbreviation NP) etc.；Can also be digital signal processor (DSP),
Specific integrated circuit (ASIC), field programmable gate array (FPGA) either other programmable logic device, discrete gate or crystalline substance
Body pipe logical device, discrete hardware components.May be implemented or execute disclosed each method in the embodiment of the present invention, step and
Logic diagram.
Further referring to Fig. 2, the high frequency bin device 200 can also include power detection module 204.The power inspection
Module 204 is surveyed to be connected with first switching module 202 and the first main control module 203 respectively.Wherein, the power detection module
204 can be used for detecting it is described be switched to the intermediate-freuqncy signal power that the immediate frequency cable is transmitted, and by the intermediate-freuqncy signal
Power detection result is sent to first main control module 203, so that first main control module 203 passes through the CAN bus
The top control module 400 is reported to, and then is transmitted to the host computer and is handled.In addition, the high frequency bin device 200 may be used also
To include power protection module 205.The power protection module 205 respectively with first switching module 202 and immediate frequency cable
It is connected.Wherein, when the power of first switching module 202 intermediate-freuqncy signal to be transmitted is greater than preset restriction threshold value, institute
State power protection module 205 for adjust the intermediate-freuqncy signal power (such as: be connected with ground automatically by the intermediate-freuqncy signal energy
Amount is released) within the restriction threshold value, to prevent from damaging the observation chamber device 300.
Referring to Fig. 2, the observation chamber device 300 can also include frequency spectrum compensation module 304 and power regulation mould
Block 305.The frequency spectrum compensation module 304 is connected between the power protection module 205 and the power conditioning module 305,
The power conditioning module 305 is connected between the frequency spectrum compensation module 304 and second switching module 302.In detail,
The input terminal of the frequency spectrum compensation module 304 is connected by immediate frequency cable with the power protection module 205, output end passes through institute
Power conditioning module 305 is stated to be connected with second switching module 302.The frequency spectrum compensation module 304 can be used for in described
The intermediate-freuqncy signal of frequency cable transmission carries out spectral characteristic compensation, so that the spectrum curve of the intermediate-freuqncy signal is linear spectral (frequency
Inband flatness is flat), to meet the requirement of the subsequent equipment in the observation chamber device 300.
The power conditioning module 305 can be used for adjusting the power of the intermediate-freuqncy signal, to match the observed terminals 301
The intermediate-freuqncy signal power bracket needed.As shown in figure 4, the power conditioning module 305 may include 3051 He of equalizer amplifier
The digital adjustable step attenuator 3052 being connected with the equalizer amplifier 3051.Wherein, the equalizer amplifier 3051 is distinguished
It is connected with the frequency spectrum compensation module 304 and the second main control module 303.The equalizer amplifier 3051 can be used for the intermediate frequency
The power of signal amplifies.It is described number adjustable step attenuator 3052 respectively with second switching module 302 and second
Main control module 303 is connected.The number adjustable step attenuator 3052 can be used for decaying to the power of intermediate-freuqncy signal.This reality
It applies in example, the gain of the equalizer amplifier 3051 can achieve 15dB, the decaying of the number adjustable step attenuator 3052
Adjustable range can be between 0.25~63.75dB.
It should be appreciated that in other embodiments, the power conditioning module 305 also can be omitted, so that the frequency is mended
Module 304 is repaid to be connected directly between the power protection module 205 and the second switching module 302.
In addition, since the power of the input intermediate-freuqncy signal of the different needs of observed terminals 301 is different, even the same sight
Terminal 301 is surveyed, at different times because being influenced by factors such as weather, the power of the input intermediate-freuqncy signal needed is also different, because
This, as shown in Fig. 2, the observation chamber device 300 can also include Feedback of Power module 306.Wherein, the Feedback of Power module
306 are connected with each observed terminals 301 and the second main control module 303 respectively.The Feedback of Power module 306 can be used for connect
The power for receiving the feedback of observed terminals 301 of intermediate-freuqncy signal is sent to second main control module 303, so that the second master control mould
Block 303 reports to the top control module 400 by the CAN bus, and then is transmitted to the host computer and is handled.
As shown in figure 3, being the schematic diagram of the frequency decay parameter of the immediate frequency cable.Wherein, intermediate-freuqncy signal frequency spectrum
Compensation refers to intermediate-freuqncy signal after remote transmission, since decaying of the immediate frequency cable for the intermediate-freuqncy signal of different frequency is different
(such as: high frequency signal attenuation is big and low frequency signals decay is small etc.), the spectrum curve of the intermediate-freuqncy signal after final transmission is one
Oblique line influences the correctness that the observation chamber device 300 acquires intermediate-freuqncy signal.In the present embodiment, pass through the frequency spectrum compensation mould
High-frequency signal can be lacked decaying or unattenuated by block 304, and low frequency signal is decayed more.Then again by the intermediate-freuqncy signal after decaying
It amplifies, so that the spectrum curve of compensated intermediate-freuqncy signal is straight line, to meet in the observation chamber device 300
The demand of subsequent equipment.
As shown in figure 5, being a kind of flow diagram of intermediate-freuqncy signal switching method provided in an embodiment of the present invention.The intermediate frequency
Signal switching method can be applied to intermediate-freuqncy signal switching system 100 shown in FIG. 1.
In the present embodiment, the intermediate-freuqncy signal switching method be may comprise steps of.
Step S101: the high frequency bin device 200 is by the different-waveband signal down in the external environment received in
Frequency signal, and according to the top control module 400 send control instruction by each intermediate-freuqncy signal be switched to the immediate frequency cable with
It is transferred to the observation chamber device 300.
Wherein, the control instruction that the high frequency bin device 200 can be sent according to the top control module 400 executes corresponding dynamic
Make, such as intermediate-freuqncy signal is switched over, to realize automation control etc..
Since different observation missions needs to receive different band signals.For example, observations of pulsar generally requires L-band
Signal；The radiation wavelength that spectral line observation is issued according to molecule is different and selects different wave bands, and some selection C-bands also have
X-band is selected, (such as amino molecule) also selects K-band.Therefore, the high frequency bin device 200 can receive in external environment
Different-waveband signal, and the band signal is mixed down into intermediate-freuqncy signal.The high frequency bin device 200 can also be by the intermediate frequency
Signal is switched to the immediate frequency cable after being summarized, and sends it to the observation chamber device 300, to meet different sights
Survey demand.In the present embodiment, the switching channel number of the high frequency bin device 200 is greater than the switching channel number needed, to mention
For enough redundancies, it is ready for the subsequent upgrade of the high frequency bin device 200.
Step S102: the control instruction that the observation chamber device 300 is sent according to the top control module 400, in described
The different IF signal of frequency cable transmission is switched to corresponding observed terminals 301.
Wherein, the control instruction that the observation chamber device 300 can be sent according to the top control module 400 executes corresponding dynamic
Make, such as intermediate-freuqncy signal is switched over, to realize automation control etc..
Since different observation missions needs different observed terminals 301, in the present embodiment, the observation chamber device 300
It may include multiple observed terminals 301, the different IF signal sent for receiving the immediate frequency cable.For example, pulsar is seen
Survey needs pulsar terminal, and spectral line observation needs DFB terminal, and Flow Observation needs IDV terminal and VLBI observation to need to use
VLBI terminal etc..When the observation chamber device 300 receives the intermediate-freuqncy signal sent by the immediate frequency cable, by different intermediate frequencies
Signal is switched to corresponding observed terminals 301, to meet different observation requirements.In the present embodiment, second switching module
302 switching channel number is greater than the switching channel number needed, is the observation chamber device 300 to provide enough redundancies
Subsequent upgrade be ready.
In conclusion a kind of intermediate-freuqncy signal switching system 100 provided in an embodiment of the present invention, can be applied to radio astronomy prestige
Remote mirror.The intermediate-freuqncy signal switching system 100 includes high frequency bin device 200, observation chamber device 300 and top control module 400.?
In the high frequency bin device 200, the control instruction that the first main control module 203 is sent according to top control module 400 is to the first switching mould
Block 202 is controlled, which can be switched to immediate frequency cable for the intermediate-freuqncy signal that receiver 201 is sent and pass
It is defeated by observation chamber device 300.In the observation chamber device 300, the second main control module 303 is sent according to top control module 400
Control instruction controls the second switching module 302, the intermediate-freuqncy signal which can transmit immediate frequency cable
It is switched to corresponding observed terminals 301.In this way, the efficiency and accuracy switched over to intermediate-freuqncy signal is effectively increased, and
Reduce its mechanical wear and error rate for human incurring fault.
Further, the top control module 400 is main with first main control module 203 and second respectively by CAN bus
It controls module 303 to be connected, due to the transmission characteristic of CAN bus, further ensures the stability and safety of system work, and
The RFI interference in the intermediate-freuqncy signal switching system 100 is effectively weakened, its limitation to RFI interference is met.
It should be noted that in embodiment provided herein, it should be understood that disclosed device and method,
It may be implemented in other ways.The apparatus embodiments described above are merely exemplary, for example, the unit is drawn
Point, only a kind of logical function partition, there may be another division manner in actual implementation.Flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that in some implementations as replacements, function marked in the box can also be to be different from attached drawing
Middle marked sequence occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes can also be with
It executes in the opposite order, this depends on the function involved.It is also noted that each side in block diagram and or flow chart
The combination of box in frame and block diagram and or flow chart can be based on firmly with the defined function of execution or the dedicated of movement
The system of part is realized, or can be realized using a combination of dedicated hardware and computer instructions.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It should be noted that in this application, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that article or equipment including a series of elements not only include those elements, but also
Including other elements that are not explicitly listed.In the absence of more restrictions, limited by sentence "including a ..."
Element, it is not excluded that there is also other identical elements in the article or equipment for including the element.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of intermediate-freuqncy signal switching system is applied to radio astronomical telescope, which is characterized in that intermediate-freuqncy signal switching system
System include high frequency bin device, the observation chamber device being connected with the high frequency bin device by immediate frequency cable and respectively with the height
The top control module that frequency bin device is connected with observation chamber device；
The high frequency bin device includes for by different-waveband signal down in the external environment received to the more of intermediate-freuqncy signal
A receiver, the intermediate-freuqncy signal for sending each receiver are switched to the first switching mould that the immediate frequency cable transmits
The first master control that block and control instruction for being sent according to the top control module control first switching module
Module, first main control module are connected with the top control module and the first switching module respectively；
The observation chamber device includes multiple observed terminals for receiving different IF signal, for passing the immediate frequency cable
Defeated different IF signal is switched to corresponding observed terminals and carries out received second switching module and for according to described total
The second main control module that the control instruction that control module is sent controls second switching module, second main control module
It is connected respectively with the top control module and the second switching module.
2. intermediate-freuqncy signal switching system according to claim 1, which is characterized in that the top control module passes through CAN bus
It is connected respectively with first main control module and the second main control module, the top control module is used to parse the operation of host computer transmission
Instruction obtains control instruction corresponding with the operational order, and the control instruction is sent to first main control module and the
Two main control modules.
3. intermediate-freuqncy signal switching system according to claim 1, which is characterized in that the high frequency bin device further includes difference
The power detection module connecting with first switching module and the first main control module, the power detection module is for detecting institute
It states and is switched to the intermediate-freuqncy signal power that the immediate frequency cable is transmitted, and power detection result is sent to first master control
Module, so that first main control module reports to the top control module.
4. intermediate-freuqncy signal switching system according to claim 1, which is characterized in that the high frequency bin device further includes connection
Power protection module between first switching module and immediate frequency cable, the power protection module are used for described first
When the power of switching module intermediate-freuqncy signal to be transmitted is greater than preset restriction threshold value, the power of the intermediate-freuqncy signal is adjusted to institute
It states and limits within threshold value.
5. intermediate-freuqncy signal switching system according to claim 1, which is characterized in that the observation chamber device further includes connection
Frequency spectrum compensation module between the immediate frequency cable and the second switching module, the frequency spectrum compensation module are used for the intermediate frequency
The intermediate-freuqncy signal of cable transmission carries out spectral characteristic compensation, so that the intermediate-freuqncy signal is linear spectral signal.
6. intermediate-freuqncy signal switching system according to claim 5, which is characterized in that the observation chamber device further includes connection
Power conditioning module between the immediate frequency cable and the second switching module, the power conditioning module is for adjusting in described
The power of frequency signal, to match the power bracket of the observed terminals.
7. intermediate-freuqncy signal switching system according to claim 6, which is characterized in that the power conditioning module includes being used for
The equalizer amplifier amplify to the power of the intermediate-freuqncy signal and the power for the intermediate-freuqncy signal are decayed
Digital adjustable step attenuator.
8. intermediate-freuqncy signal switching system according to claim 7, which is characterized in that the observation chamber device further includes power
Feedback module, the power conditioning module include that equalizer amplifier and the adjustable stepping of number being connected with the equalizer amplifier decline
Subtract device；
Wherein, the equalizer amplifier is connected with the frequency spectrum compensation module and the second main control module respectively, the balanced amplification
Device can be used for amplifying the power of the intermediate-freuqncy signal；The number adjustable step attenuator switches with described second respectively
Module is connected with the second main control module, and the number adjustable step attenuator can be used for decaying to the power of intermediate-freuqncy signal；
The Feedback of Power module is used to the power that the observed terminals of receiving intermediate frequency signal are fed back being sent to second master control
Module, so that second main control module controls the power conditioning module.
9. intermediate-freuqncy signal switching system according to claim 1, which is characterized in that first switching module and second is cut
Changing the mold block is multichannel microwave switching switch.
10. a kind of intermediate-freuqncy signal switching method is applied to intermediate-freuqncy signal switching system, which is characterized in that the intermediate-freuqncy signal is cut
The system of changing include high frequency bin device, the observation chamber device being connected with the high frequency bin device by immediate frequency cable and respectively with institute
The top control module that high frequency bin device is connected with observation chamber device is stated, the observation chamber device includes multiple observed terminals, wherein institute
The method of stating includes:
The high frequency bin device by the different-waveband signal down in the external environment received to intermediate-freuqncy signal, and according to described
Each intermediate-freuqncy signal is switched to the immediate frequency cable to be transferred to the observation chamber device by the control instruction that top control module is sent；
The control instruction that the observation chamber device is sent according to the top control module, the different IF that the immediate frequency cable is transmitted
Signal is switched to corresponding observed terminals.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1328075A2 (en) * | 2002-01-11 | 2003-07-16 | Trw Inc. | Redundancy switching for satellite payload |
| CN105659935B (en) * | 2009-11-24 | 2013-02-27 | 北京空间飞行器总体设计部 | A kind of be applicable to remote sensing satellite data transmission subsystem whole star test macro |
| CN104135738A (en) * | 2014-05-28 | 2014-11-05 | 大唐移动通信设备有限公司 | Monitoring device for mobile communication |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1328075A2 (en) * | 2002-01-11 | 2003-07-16 | Trw Inc. | Redundancy switching for satellite payload |
| CN105659935B (en) * | 2009-11-24 | 2013-02-27 | 北京空间飞行器总体设计部 | A kind of be applicable to remote sensing satellite data transmission subsystem whole star test macro |
| CN104135738A (en) * | 2014-05-28 | 2014-11-05 | 大唐移动通信设备有限公司 | Monitoring device for mobile communication |
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