CN106791615A - A kind of unmanned plane DVB T figures pass channel automatic selective system and system of selection - Google Patents
A kind of unmanned plane DVB T figures pass channel automatic selective system and system of selection Download PDFInfo
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- CN106791615A CN106791615A CN201611093931.6A CN201611093931A CN106791615A CN 106791615 A CN106791615 A CN 106791615A CN 201611093931 A CN201611093931 A CN 201611093931A CN 106791615 A CN106791615 A CN 106791615A
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- signal
- transmitting terminal
- unmanned plane
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/185—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source from a mobile camera, e.g. for remote control
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
Abstract
The present invention provides a kind of unmanned plane DVB T figures and passes channel automatic selective system and system of selection, including the signal transmitting terminal, reception and the signal receiving end of process signal that are arranged on unmanned plane and the channel detection systems for being responsible for carrying out live channel scanning；In actual use, if the insufficient sensitivity of the channel of transmission signal is high between signal transmitting terminal and signal receiving end, channel detection systems can then send a signal to remote controller control signal to the reception of wireless signals and delivery unit in signal transmitting terminal, channel to signal transmitting terminal is modified, for determining that optimal channel carries out the transmission of data message, realize high efficiency, long range image transmitting, meet actual demand, using the upload control of receiving terminal thin consolidation remote control, carry out channel replacing, with under ensuring environment at the scene, can use always to the best channel of effect, to ensure in same environment, the laser propagation effect of longest distance, the design using effect is good, it is adapted to be widely popularized and uses.
Description
[technical field]
Good the present invention relates to unmanned plane image transmission technology field, more particularly to a kind of laser propagation effect, transmission range is long, frequency
Road switches flexible unmanned plane DVB-T figures and passes channel automatic selective system and system of selection.
[background technology]
Increasing UAV flight's high definition figure is passed, and the high definition figure of present main flow uses the technology of wifi, because wifi
Per se with frequency hopping, not crowded channel can be automatically selected, but the shortcoming of wifi is short transmission range, and because
The difference of distance is used, and also results in the difference of transmission rate, and cannot ensure the quality of picture, can be true using DVB-T transmission
Protect over long distances, and transmission rate, high definition picture is also ensured that, but DVB-T does not carry frequency hopping in itself, has and does not just have
There is method to automatically select the channel of relative clean, if the channel just used runs into many wireless signals of comparing, it is possible to because
This image that is interfered so that transmission range shortens.
Based on above mentioned problem, in order to be able to keep transmitting over long distances, it is to avoid other signals are disturbed, and urgent need teaches skill to existing figure
Art is improved and improves, and realizes monitoring to existing channel, and image delivering system with automatic decision channel and can be carried out
Change.
To reach this purpose, those skilled in the art has carried out substantial amounts of research and development and experiment, and achieve preferably into
Achievement.
[content of the invention]
To overcome the problems of prior art, a kind of laser propagation effect of present invention offer is good, and transmission range is long, and channel is cut
Change flexible unmanned plane DVB-T figures and pass channel automatic selective system and system of selection.
The scheme that the present invention solves technical problem is to provide a kind of unmanned plane DVB-T figures biography channel automatic selective system and choosing
Selection method, including be arranged on unmanned plane signal transmitting terminal, receive and the signal receiving end of process signal and be responsible for carrying out
The channel detection systems of live channel scanning；
The signal transmitting terminal includes what power supply, high definition motion cameras and the high definition motion cameras were electrically connected with
Emitter and reception of wireless signals and delivery unit for receiving control signal；The emitter includes coding unit, right
The vision signal COFDM modulating units being modulated of unmanned plane shooting, the Linear Power Amplifier that signal enhancing is carried out to transmission signal
Unit, the RF processing unit for modulated signal to be converted to predeterminated frequency and the hair for launching DVB-T wireless signals
Penetrate antenna；The coding unit receives the image/video information from the shooting of high definition motion cameras and is encoded, and has encoded
COFDM modulating units are sent to after and are modulated pretreatment, the DVB-T transmission of wireless signals after the completion for the treatment of is to radio frequency processing
Unit carries out channel selection, is then sent DVB-T wireless signals by transmitting antenna；
The signal receiving end includes the remote control and signal receiving assembly for being manipulated to unmanned plane, the signal
Receiving unit includes controller, signal receiving antenna, frequency conversion processing unit, COFDM demodulating units and high-definition display screen；Institute
State after signal receiving antenna receives the signal launched from transmitting antenna in unmanned plane signal sending system component and transmit
Frequency-conversion processing is carried out to frequency conversion processing unit, being then transferred to COFDM demodulating units carries out signal demodulation process, and treatment is completed
After be transferred to decoding unit and carry out decoding process, high-definition display screen sent a signal to after the completion of decoding carry out video and show；
The channel detection systems are scanned treatment to the channel information at scene, if detecting the spirit of currently used channel
Quick value is relatively low, then send a signal to remote controller control signal single with transmission to the reception of wireless signals in signal transmitting terminal
Unit, the channel to signal transmitting terminal is modified, and after the completion of the channel change of signal transmitting terminal, channel detection systems then send letter
Number to signal receiving assembly carry out channel correspondence change.
Preferably, the emitter also includes the Linear Power Amplifier for carrying out signal enhanced processing to DVB-T wireless signals
Unit.
Preferably, the channel detection systems include channel scanning unit and for being analyzed to channel information
Channel comparing unit；The channel scanning unit carries out continuation scanning to the multiple channels in affiliated area, it is determined that currently
Using the channel and Sensitirity va1ue that arrive several channels high, and send information to channel comparing unit and carry out channel information ratio
It is right, determine the difference value of currently used channel and factor of merit channel high.
Preferably, the RF processing unit includes digital-to-analog converter, voltage controlled oscillator, upconverter and bandpass filtering
Device.
Preferably, the frequency conversion processing unit includes single for producing the digital controlled oscillator of sine and cosine ripple sample value to be mixed
Unit, the signal phase after digitlization in sine and cosine ripple sample value and frequency conversion processing unit that frequency conversion processing unit will be produced
Multiply, and complete mixing.
A kind of unmanned plane DVB-T figures pass channel automatic selecting method, comprise the following steps,
S1：The image/video information transfer that unmanned plane signal transmitting terminal will be photographed is received to signal receiving end, and is passed through
High-definition display screen in signal receiving end carries out video and shows；
S2：Channel detection systems are scanned treatment to the channel information at scene, and within the time of one minute, accumulation is received
8 Sensitirity va1ues of channel of ensemble average；
S3：Determine the currently used channel for arriving of signal transmitting terminal and signal receiving end of UAS, and its is sensitive
Angle value compares with the average sensitivity value of other front three channels；Gap reaches 20%；
S4：Determine the gap between the Sensitirity va1ue of the currently used channel for arriving and the average sensitivity value of front three channel
Whether 20% is reached；
S5：If gap meets or exceeds 20%, channel detection systems then send a signal to remote controller control signal to
Reception of wireless signals and delivery unit in signal transmitting terminal, the channel to signal transmitting terminal are modified；
S6：After the completion of the channel change of signal transmitting terminal, channel detection systems send a signal to signal receiving assembly again
Carry out the correspondence replacing of channel.
Compared with prior art, a kind of unmanned plane DVB-T figures of the invention pass channel automatic selective system and system of selection is logical
Cross setting channel detection systems and treatment is scanned to the channel information at scene, in actual use, if signal transmitting terminal
The insufficient sensitivity of the channel of transmission signal is high between signal receiving end, and channel detection systems can then send a signal to remote control
Transmission of control signals is carried out more to the reception of wireless signals and delivery unit in signal transmitting terminal, the channel to signal transmitting terminal
Change, for determining that optimal channel carries out the transmission of data message, realize high efficiency, long range image transmitting meets actual need
Ask, using the upload control of receiving terminal thin consolidation remote control, carry out channel replacing, with ensuring environment at the scene, always all
Can use to the best channel of effect, to ensure in same environment, the laser propagation effect of longest distance, the design using effect
Well, it is adapted to be widely popularized and uses.
[brief description of the drawings]
Fig. 1 is the operation principle schematic diagram that a kind of unmanned plane DVB-T figures of the invention pass channel automatic selective system.
Fig. 2 is the flow chart of the system of selection that a kind of unmanned plane DVB-T figures of the invention pass channel automatic selective system.
[specific embodiment]
To make the purpose of the present invention, technical scheme and advantage become more apparent, below in conjunction with drawings and Examples, to this
Invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting this invention.
Fig. 1 and Fig. 2 is referred to, a kind of unmanned plane DVB-T figures of the invention pass channel automatic selective system to be included being arranged at nothing
Signal transmitting terminal on man-machine, receive and the signal receiving end of process signal and be responsible for carrying out the channel inspection of live channel scanning
Examining system；
The signal transmitting terminal includes what power supply, high definition motion cameras and the high definition motion cameras were electrically connected with
Emitter and reception of wireless signals and delivery unit for receiving control signal；The emitter includes coding unit, right
The vision signal COFDM modulating units being modulated of unmanned plane shooting, the Linear Power Amplifier that signal enhancing is carried out to transmission signal
Unit, the RF processing unit for modulated signal to be converted to predeterminated frequency and the hair for launching DVB-T wireless signals
Penetrate antenna；The coding unit receives the image/video information from the shooting of high definition motion cameras and is encoded, and has encoded
COFDM modulating units are sent to after and are modulated pretreatment, the DVB-T transmission of wireless signals after the completion for the treatment of is to radio frequency processing
Unit carries out channel selection, is then sent DVB-T wireless signals by transmitting antenna；
The signal receiving end includes the remote control and signal receiving assembly for being manipulated to unmanned plane, the signal
Receiving unit includes controller, signal receiving antenna, frequency conversion processing unit, COFDM demodulating units and high-definition display screen；Institute
State after signal receiving antenna receives the signal launched from transmitting antenna in unmanned plane signal sending system component and transmit
Frequency-conversion processing is carried out to frequency conversion processing unit, being then transferred to COFDM demodulating units carries out signal demodulation process, and treatment is completed
After be transferred to decoding unit and carry out decoding process, high-definition display screen sent a signal to after the completion of decoding carry out video and show；
The channel detection systems are scanned treatment to the channel information at scene, if detecting the spirit of currently used channel
Quick value is relatively low, then send a signal to remote controller control signal single with transmission to the reception of wireless signals in signal transmitting terminal
Unit, the channel to signal transmitting terminal is modified, and after the completion of the channel change of signal transmitting terminal, channel detection systems then send letter
Number to signal receiving assembly carry out channel correspondence change.
Treatment is scanned to the channel information at scene by setting channel detection systems, in actual use, if
The insufficient sensitivity of the channel of transmission signal is high between signal transmitting terminal and signal receiving end, and channel detection systems can then send letter
Number to remote controller control signal to the reception of wireless signals and delivery unit in signal transmitting terminal, to the frequency of signal transmitting terminal
Road is modified, and for determining that optimal channel carries out the transmission of data message, realizes high efficiency, and long range image transmitting is full
Sufficient actual demand, using the upload control of receiving terminal thin consolidation remote control, carries out channel replacing, to ensure environment at the scene
Under, always can be using to the best channel of effect, to ensure in same environment, the laser propagation effect of longest distance originally sets
Meter using effect is good, is adapted to be widely popularized and uses.
Preferably, the emitter also includes the Linear Power Amplifier for carrying out signal enhanced processing to DVB-T wireless signals
Unit.Signal is amplified using Linear Power Amplifier unit, is more beneficial for ensureing the stabilization transmission of effective information.
Preferably, the channel detection systems include channel scanning unit and for being analyzed to channel information
Channel comparing unit；The channel scanning unit carries out continuation scanning to the multiple channels in affiliated area, it is determined that currently
Using the channel and Sensitirity va1ue that arrive several channels high, and send information to channel comparing unit and carry out channel information ratio
It is right, determine the difference value of currently used channel and factor of merit channel high.
Preferably, the RF processing unit includes digital-to-analog converter, voltage controlled oscillator, upconverter and bandpass filtering
Device.
Preferably, the frequency conversion processing unit includes single for producing the digital controlled oscillator of sine and cosine ripple sample value to be mixed
Unit, the signal phase after digitlization in sine and cosine ripple sample value and frequency conversion processing unit that frequency conversion processing unit will be produced
Multiply, and complete mixing.
A kind of unmanned plane DVB-T figures pass channel automatic selecting method, comprise the following steps,
S1：The image/video information transfer that unmanned plane signal transmitting terminal will be photographed is received to signal receiving end, and is passed through
High-definition display screen in signal receiving end carries out video and shows；
S2：Channel detection systems are scanned treatment to the channel information at scene, and within the time of one minute, accumulation is received
8 Sensitirity va1ues of channel of ensemble average；
S3：Determine the currently used channel for arriving of signal transmitting terminal and signal receiving end of UAS, and its is sensitive
Angle value compares with the average sensitivity value of other front three channels；Gap reaches 20%；
S4：Determine the gap between the Sensitirity va1ue of the currently used channel for arriving and the average sensitivity value of front three channel
Whether 20% is reached；
S5：If gap meets or exceeds 20%, channel detection systems then send a signal to remote controller control signal to
Reception of wireless signals and delivery unit in signal transmitting terminal, the channel to signal transmitting terminal are modified；
S6：After the completion of the channel change of signal transmitting terminal, channel detection systems send a signal to signal receiving assembly again
Carry out the correspondence replacing of channel.
Compared with prior art, a kind of unmanned plane DVB-T figures of the invention pass channel automatic selective system and system of selection is logical
Cross setting channel detection systems and treatment is scanned to the channel information at scene, in actual use, if signal transmitting terminal
The insufficient sensitivity of the channel of transmission signal is high between signal receiving end, and channel detection systems can then send a signal to remote control
Transmission of control signals is carried out more to the reception of wireless signals and delivery unit in signal transmitting terminal, the channel to signal transmitting terminal
Change, for determining that optimal channel carries out the transmission of data message, realize high efficiency, long range image transmitting meets actual need
Ask, using the upload control of receiving terminal thin consolidation remote control, carry out channel replacing, with ensuring environment at the scene, always all
Can use to the best channel of effect, to ensure in same environment, the laser propagation effect of longest distance, the design using effect
Well, it is adapted to be widely popularized and uses.
Invention described above implementation method, is not intended to limit the scope of the present invention..It is any in the present invention
Spirit and principle within modification, equivalent and the improvement made etc., should be included in claim protection model of the invention
Within enclosing.
Claims (6)
1. a kind of unmanned plane DVB-T figures pass channel automatic selective system, it is characterised in that：Including the signal being arranged on unmanned plane
Transmitting terminal, receive and the signal receiving end of process signal and be responsible for carrying out the channel detection systems of live channel scanning；
The signal transmitting terminal includes the transmitting that power supply, high definition motion cameras and the high definition motion cameras are electrically connected with
Machine and reception of wireless signals and delivery unit for receiving control signal；The emitter is including coding unit, to nobody
Machine shoot vision signal be modulated COFDM modulating units, for modulated signal to be converted at the radio frequency of predeterminated frequency
Reason unit and the transmitting antenna for launching DVB-T wireless signals；
The coding unit receives the image/video information from the shooting of high definition motion cameras and is encoded, after the completion of coding
It is sent to COFDM modulating units and is modulated pretreatment, the DVB-T transmission of wireless signals after the completion for the treatment of is to RF processing unit
Channel selection is carried out, then DVB-T wireless signals is sent by transmitting antenna；
The signal receiving end includes the remote control and signal receiving assembly for being manipulated to unmanned plane, and the signal is received
Component includes controller, signal receiving antenna, frequency conversion processing unit, COFDM demodulating units and high-definition display screen；The letter
Number reception antenna is transferred to down after receiving the signal launched from transmitting antenna in unmanned plane signal sending system component
Frequency-conversion processing unit carries out frequency-conversion processing, and being then transferred to COFDM demodulating units carries out signal demodulation process, is passed after the completion for the treatment of
Being defeated by decoding unit carries out decoding process, high-definition display screen is sent a signal to after the completion of decoding carries out video and show；
The channel detection systems are scanned treatment to the channel information at scene, if detecting the factor of merit of currently used channel
It is relatively low, then remote controller control signal is sent a signal to the reception of wireless signals and delivery unit in signal transmitting terminal, it is right
The channel of signal transmitting terminal is modified, and after the completion of the channel change of signal transmitting terminal, channel detection systems then send a signal to
Signal receiving assembly carries out the correspondence replacing of channel.
2. a kind of unmanned plane DVB-T figures as claimed in claim 1 pass channel automatic selective system, it is characterised in that：The hair
Penetrating machine also includes the Linear Power Amplifier unit for being used to carry out DVB-T wireless signals signal enhanced processing.
3. a kind of unmanned plane DVB-T figures as claimed in claim 1 pass channel automatic selective system, it is characterised in that：The frequency
Road detecting system includes channel scanning unit and the channel comparing unit for being analyzed to channel information；The frequency
Road scanning element carries out continuation scanning to the multiple channels in affiliated area, determines the currently used channel for arriving and sensitivity
Value several channels high, and send information to channel comparing unit and carry out channel information comparison, determine currently used channel with
The difference value of factor of merit channel high.
4. a kind of unmanned plane DVB-T figures as claimed in claim 1 pass channel automatic selective system, it is characterised in that：It is described to penetrate
Frequency processing unit includes digital-to-analog converter, voltage controlled oscillator, upconverter and bandpass filter.
5. a kind of unmanned plane DVB-T figures as claimed in claim 1 pass channel automatic selective system, it is characterised in that：Under described
Frequency-conversion processing unit includes the digital controlled oscillator mixing unit for producing sine and cosine ripple sample value, and frequency conversion processing unit will be produced
The signal multiplication after digitlization in raw sine and cosine ripple sample value and frequency conversion processing unit, and complete mixing.
6. a kind of unmanned plane DVB-T figures as claimed in claim 1 pass channel automatic selecting method, it is characterised in that：Including with
Lower step,
S1：The image/video information transfer that unmanned plane signal transmitting terminal will be photographed is received to signal receiving end, and by signal
High-definition display screen in receiving terminal carries out video and shows；
S2：Channel detection systems are scanned treatment to the channel information at scene, and within the time of one minute, accumulation is collected flat
The Sensitirity va1ue of equal 8 channels；
S3：Determine the currently used channel for arriving of signal transmitting terminal and signal receiving end of UAS, and by its Sensitirity va1ue
Average sensitivity value with other front three channels compares；
S4：Determine whether is gap between the Sensitirity va1ue of the currently used channel for arriving and the average sensitivity value of front three channel
Reach 20%；
S5：If gap meets or exceeds 20%, channel detection systems then send a signal to remote controller control signal to signal
Reception of wireless signals and delivery unit in transmitting terminal, the channel to signal transmitting terminal are modified；
S6：After the completion of the channel change of signal transmitting terminal, channel detection systems send a signal to signal receiving assembly and carry out again
The correspondence replacing of channel.
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| CN201611093931.6A CN106791615A (en) | 2016-12-02 | 2016-12-02 | A kind of unmanned plane DVB T figures pass channel automatic selective system and system of selection |
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| CN201611093931.6A CN106791615A (en) | 2016-12-02 | 2016-12-02 | A kind of unmanned plane DVB T figures pass channel automatic selective system and system of selection |
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| CN201611093931.6A Pending CN106791615A (en) | 2016-12-02 | 2016-12-02 | A kind of unmanned plane DVB T figures pass channel automatic selective system and system of selection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022183367A1 (en) * | 2021-03-02 | 2022-09-09 | 深圳市大疆创新科技有限公司 | User terminal, information processing method and information processing system |
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| US20100328422A1 (en) * | 2009-06-26 | 2010-12-30 | Polycom, Inc. | Method and System for Composing Video Images from a Plurality of Endpoints |
| CN102646323A (en) * | 2011-02-16 | 2012-08-22 | 天利合企业股份有限公司 | Remote control system and method for interference prevention, stealing copy prevention and RF signal stability improvement |
| CN105141977A (en) * | 2013-06-08 | 2015-12-09 | 孔涛 | Multiple-input-multiple-output MIMO transmit-receive environment test device |
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