CN108955623A - A kind of building deformation monitoring method, system and ground base navigation beacon using broadcasting and TV data broadcasting - Google Patents
A kind of building deformation monitoring method, system and ground base navigation beacon using broadcasting and TV data broadcasting Download PDFInfo
- Publication number
- CN108955623A CN108955623A CN201810562361.3A CN201810562361A CN108955623A CN 108955623 A CN108955623 A CN 108955623A CN 201810562361 A CN201810562361 A CN 201810562361A CN 108955623 A CN108955623 A CN 108955623A
- Authority
- CN
- China
- Prior art keywords
- broadcasting
- deformation
- navigation
- deformation monitoring
- measurement data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/71—Wireless systems
- H04H20/72—Wireless systems of terrestrial networks
Abstract
The present invention discloses a kind of building deformation monitoring method, system and ground base navigation beacon using broadcasting and TV data broadcasting.System mainly includes broadcasting station, deformation monitoring terminal, deformation monitoring center and ground beacon location receiver.Ground base navigation beacon is that the deformation measurement data transmits signal.Use the method for the building deformation monitoring system of broadcasting and TV data broadcasting, key step are as follows: 1) differential navigation update information is broadcast in broadcasting station.2) deformation monitoring terminal receives satellite navigation signals and differential navigation update information.3) deformation monitoring terminal obtains itself and is accurately positioned time service information.4) self poisoning time service information is sent to deformation monitoring center and/or ground beacon location receiver by deformation monitoring terminal.5) deformation monitoring center receives data transfer signal and carries out deformation monitoring to building where deformation monitoring terminal.The present invention is suitble to the deformation monitoring of building and/or non-building such as massif etc..
Description
Technical field
The present invention relates to technical field of satellite navigation, specifically a kind of building deformation using broadcasting and TV data broadcasting is monitored
Method, system and ground base navigation beacon.
Background technique
According to " Code for engineering surveying GB 50026-2007 ", deformation monitoring refers to construction of structures and its ground, building base
Hole or the displacement of a certain range of rock mass and the soil body, sedimentation, inclination, amount of deflection, crack and Correlative Influence Factors (such as underground water,
Temperature, ess-strain etc.) it is monitored, and the process of deformation analysis forecast is provided.
In recent years, with the rapid development of civil construction industry, the large sizes such as all kinds of high-rise civil buildings and bridge, dykes and dams are built
It builds and continues to bring out.In order to take precautions against the harm of building deformation collapsing bring, both at home and abroad for the development of building technology for deformation monitoring
Also pay attention to further with research.In traditional building deformation monitoring technology, deformation monitoring terminal needs constantly lead satellite
" the original navigation observed quantity " of boat is sent to deformation monitoring center, and amount of communication data is larger, is generally basede on the private radio in region
Perhaps mobile communications network is perhaps unable to large-area coverage as Inter-System Information transfer means or construction is high for network, optical fiber
It is expensive, or continuous payment communication expense is needed, limit the large-scale application of deformation monitoring technology.
Summary of the invention
Present invention aim to address problems of the prior art.
To realize the present invention purpose and the technical solution adopted is that a kind of such, building using broadcasting and TV data broadcasting
DEFORMATION MONITORING SYSTEM mainly includes broadcasting station, deformation monitoring terminal, deformation monitoring center and ground beacon position receiver
Machine.
The broadcasting station differential navigation update information is broadcast by broadcasting and TV data broadcasting signal.
Further, the broadcasting station is digital ground multimedia broadcast radio station, that is, broadcasting station DTMB.
The broadcasting station mainly includes navigation antenna, navigation enhancing server, multiplexer, DTMB driver, broadcast electricity
Depending on signal transmitter and radio and television antenna.
The navigation antenna receives satellite navigation signals.
Navigation enhancing server mainly includes navigation enhancing data acquisition module and transport stream package module.
The navigation enhances data acquisition module and receives from third party differential navigation update information source or the navigation antenna
Satellite navigation signals in obtain differential navigation update information.The differential navigation that the transport stream package module will acquire corrects letter
Breath is encapsulated as differential navigation update information transport stream.
The biography that the multiplexer inputs differential navigation update information transport stream as program all the way and other transport stream sources
Defeated stream is multiplexed with program stream together.
The program stream map is DTMB physical layer transmission signal by the DTMB driver, and is output to radio and television letter
Number transmitter.
DTMB physical layer transmission signal is carried out power amplification by the broadcast television signal transmitter, and passes through the TV
Broadcast antenna is sent to the deformation monitoring terminal.
The deformation monitoring terminal receives the satellite navigation signals, while receiving the broadcasting and TV data broadcasting and demodulating
Differential navigation update information therein.The deformation monitoring terminal relies on the satellite navigation signals and differential navigation amendment
High accuracy positioning time service of the information realization to itself obtains itself and is accurately positioned time service information.
The deformation monitoring terminal itself will be accurately positioned time service information and will be sent to by deformation measurement data transmission signal
The deformation monitoring center and/or ground beacon location receiver.
The deformation monitoring terminal mainly includes broadcasting and TV data broadcast reception antenna, broadcasting and TV data broadcast receiver, satellite
Navigation signal receiving antenna, specific satellite navigation neceiver, deformation measurement data transmission signal transmitter, deformation measurement data pass
Defeated signal transmitting antenna, digital-to-analogue conversion module and voltage controlled crystal oscillator.
Broadcasting and TV data broadcast reception antenna receives the broadcasting and TV data broadcasting signal, and it is wide to pass to the broadcasting and TV data
Broadcast receiver.
The broadcasting and TV data broadcast receiver demodulates the broadcasting and TV data broadcasting signal, and extracts the difference
Navigation update information.
Satellite navigation signals receiving antenna receives the satellite navigation signals, and passes to the specific satellite navigation and receive
Machine.
The specific satellite navigation neceiver relies on the satellite navigation signals and differential navigation update information, resolving obtain
Itself is accurately positioned time service information.
The deformation measurement data transmission signal transmitter generates adjustment pulse per second (PPS) according to the accurate positioning time service information
Phase, so that its rising edge is synchronized to UTC Universal Time Coordinated whole moment second, and export pulse per second (PPS) pass to specific satellite navigation receive
Machine.
The deformation measurement data transmission signal transmitter calculates reference clock also according to the accurate positioning time service information
Frequency and nominal frequency difference, calculate voltage-controlled control word, and voltage-controlled control word is passed into the digital-to-analogue conversion module,
To adjust the output frequency of voltage controlled crystal oscillator, the difference of the output frequency and nominal frequency that make voltage controlled crystal oscillator is minimized.
The deformation measurement data transmission signal transmitter will be accurately positioned time service information and be transmitted by deformation measurement data
Signal is sent to the deformation monitoring center and/or ground beacon location receiver.
The deformation monitoring center receives the deformation measurement data and transmits signal, thus to where deformation monitoring terminal
Building carries out deformation monitoring.
The ground beacon location receiver receives the deformation measurement data and transmits signal, and described by deformation prison
Measured data transmits signal as a kind of ground beacon positioning signal, to realize self poisoning.
The specific satellite navigation neceiver relies on the satellite navigation signals and differential navigation update information, resolving obtain
Itself is accurately positioned time service information, it is characterised in that:
The specific satellite navigation neceiver external input pulse per second (PPS) rising edge sampling satellite navigate observed quantity, in conjunction with
The differential navigation update information carries out navigation calculation and obtains being accurately positioned time service information, obtains itself being accurately positioned time service letter
Breath.The observed quantity mainly includes accumulated carrier week number and pseudo- square in the second of satellite navigation signals.
Ground base navigation beacon used in a kind of building deformation monitoring system using broadcasting and TV data broadcasting, ground base navigation
Beacon is that the deformation measurement data transmits signal.The deformation measurement data transmission signal is by the continuous of set time length T
Modulation-frame is constituted, and set time length T can be divided exactly by whole millisecond, and the relationship of start time in period and pulse per second (PPS) rising edge is solid
Fixed.It is 2 that the spreading code of the deformation measurement data transmission signal, which is length,NSparse spreading code.Wherein N is whole greater than zero
Number.
A method of utilize broadcasting and TV data broadcasting building deformation monitor system, which is characterized in that mainly include with
Lower step:
1) differential navigation update information is broadcast by broadcasting and TV data broadcasting signal in the broadcasting station.
The broadcasting station is as follows by the key step that broadcasting and TV data broadcasting signal broadcasts differential navigation update information:
1.1) differential navigation update information is encapsulated as differential navigation update information transport stream by the navigation enhancing server,
And it is conveyed to the multiplexer.
1.2) multiplexer and is conveyed using differential navigation update information transport stream as program multiplexing all the way to program stream
To the DTMB driver.
1.3) program stream map is DTMB physical layer transmission signal by the DTMB driver, and is conveyed to the broadcast electricity
Depending on signal transmitter.
1.4) after the broadcast television signal transmitter carries out power amplification to the DTMB physical layer transmission signal, pass through
The radio and television antenna is sent to the deformation monitoring terminal.
2) satellite navigation signals and broadcasting and TV data that the deformation monitoring terminal reception Global Satellite Navigation System is sent are wide
Broadcast signal.
3) the deformation monitoring terminal corrects letter according to the differential navigation in the satellite navigation signals, broadcasting and TV data broadcasting
Breath obtains itself and is accurately positioned time service information.
4) itself accurate positioning time service information is transmitted signal by deformation measurement data by the deformation monitoring terminal
It is sent to the deformation monitoring center and/or the ground beacon location receiver.
The deformation monitoring terminal described itself will be accurately positioned time service information and transmit signal hair by deformation measurement data
Send the key step to the deformation monitoring center and/or the ground beacon location receiver as follows:
4.1) the deformation measurement data transmission signal transmitter generates pulse per second (PPS), and carries out to the pulse per second (PPS) initial whole
Second alignment.
4.2) the deformation measurement data transmission signal transmitter starts counting, and frequency is the nominal clock frequency based on crystal oscillator
Rate.Pulse per second (PPS) is generated in next pulse per second (PPS) predetermined instant.
4.3) the deformation measurement data transmission signal transmitter starts to send continuous modulation-frame in pulse per second (PPS) rising edge.
4.4) the specific satellite navigation neceiver acquires navigation observed quantity in pulse per second (PPS) rising edge, and resolves accurate positioning
Time service information.Accurate positioning time service information is exported and gives deformation measurement data transmission signal hair by the specific satellite navigation neceiver
Penetrate machine.
4.5) deformation measurement data transmission signal transmitter calculate time service time for being accurately positioned in time service information with
The difference of positive second, and reference clock frequency is adjusted according to the difference, reference clock frequency is adjusted, is returned to step 4.2.
The deformation monitoring terminal itself is accurately positioned time service information, including its location information and temporal information, position letter
Ceasing resolution ratio is 1 millimeter, and temporal information resolution ratio was 1 nanosecond.
5) the deformation monitoring center receives the deformation measurement data transmission signal to building where deformation monitoring terminal
Object carries out deformation monitoring, and ground beacon location receiver receives the deformation measurement data transmission signal and utilizes its progress
Itself navigator fix.
The solution have the advantages that unquestionable.The present invention is suitble to the deformation monitoring of building, is also suitble to non-building
The deformation monitoring of object such as massif etc..One aspect of the present invention is avoided using mobile communications network, thus effectively reduce system at
This.On the other hand the needs of the ground beacon positioning taken into account.
A kind of building deformation based on broadcasting and TV data broadcasting disclosed by the invention monitors system, utilizes broadcasting and TV data broadcasting
Position error correction amount is broadcast to deformation monitoring terminal with broadcast mode, and deformation monitoring terminal is only needed " itself is accurately positioned
Time service information " is sent to deformation monitoring center without retransmiting " original navigation observed quantity ", so that data greatly reduce
The traffic reduces costs, and expands the imagination space of deformation monitoring.Simultaneously as in the signal that deformation monitoring terminal is sent
Comprising " itself is accurately positioned time service information ", when these information are with a kind of the wireless of signal system that can be used as ground base navigation beacon
When data transfer signal is sent, ground beacon location receiver further carries out navigator fix using the signal.
Detailed description of the invention
Fig. 1 is that the building deformation according to the present invention using broadcasting and TV data broadcasting monitors system schematic；
Fig. 2 is digital ground multimedia broadcast broadcasting station according to the present invention structure chart；
Fig. 3 is the first composition figure of deformation monitoring terminal according to the present invention；
Fig. 4 is that second of composition of deformation monitoring terminal according to the present invention is schemed；
Fig. 5 is the deformation monitoring method flow chart according to the present invention based on broadcasting and TV data broadcasting；
Fig. 6 is that the method according to the present invention for broadcasting differential navigation update information using digital ground multimedia broadcast is illustrated
Figure；
Fig. 7 is the orientation time service information sending method flow chart of deformation monitoring terminal according to the present invention；
Fig. 8 is a kind of implementation diagram of DEFORMATION MONITORING SYSTEM according to the present invention.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all include within the scope of the present invention.
Embodiment 1:
A kind of building deformation monitoring system using broadcasting and TV data broadcasting, referring to Fig. 1, Fig. 2 and Fig. 3.
Fig. 1 is that the building deformation according to the present invention using broadcasting and TV data broadcasting monitors system schematic.As shown in Figure 1
The DEFORMATION MONITORING SYSTEM based on broadcasting and TV data broadcasting in, be related to broadcasting station, deformation monitoring terminal, deformation monitoring center and ground
Base beacon location receiver.
By taking certain residential area carries out deformation monitoring to building in the cell as an example, broadcasting station is wide by broadcasting and TV data broadcasting
Differential navigation update information is broadcast to all deformation monitoring terminals.Here, the differential navigation update information is usually from third party
Differential navigation update information source.
For a certain building, needs that at least one is installed in specific positions such as roof corners and monitor according to a modification of this invention
Terminal.Deformation monitoring terminal and reception satellite navigation signals, while receiving broadcasting and TV data broadcasting and demodulating difference therein and leading
Boat update information relies on the high accuracy positioning time service of satellite navigation signals and differential navigation update information realization to itself,
It obtains itself and is accurately positioned time service information.Itself accurate positioning time service information is further passed through deformation monitoring by deformation monitoring terminal
Data transfer signal is distributed to the ground beacon location receiver on deformation monitoring center and/or periphery.Deformation monitoring center
Analysis is monitored to the precision positions data of each deformation monitoring terminal of the building in real time, judges whether each building has generation
Deform the hidden danger collapsed.The ground beacon location receiver on periphery can also receive deformation measurement data transmission signal, and will
Deformation measurement data transmits signal as a kind of ground beacon positioning signal, to realize self poisoning.
The navigation satellite refers generally to the navigation satellites such as GPS, Beidou, GLONASS, Galileo.The navigation signal is institute
State the signal of navigation satellite transmitting.
The broadcasting station differential navigation update information is broadcast by broadcasting and TV data broadcasting, wherein the broadcasting and TV data are wide
It broadcasts, bandwidth needs support the broadcast of differential navigation update information required for deformation monitoring.In China, there are three types of typical at present
Technology option:
I) symbiosis frequency modulation data radio.The technology is that a kind of data broadcasting is colonized in the 87-- covered extensively at present
In the FM signal band of the transmitter transmitting in the broadcasting station 108MHz.The network of China's frequency modulation broadcasting at present has built completion, extensively
It broadcasts transmitter apparatus and also widely covers all parts of the country, and symbiosis frequency modulation data radio does not need modification and new establish is broadcasted
Transmitter apparatus.
II) frequency modulation frequency band digital audio broadcasting, i.e. CDR broadcast, the professional standard of China's frequency modulation frequency band digital audio broadcasting
For " audio broadcasting of GY/T 268.1-2013 frequency modulation frequency band digital ".
III) digital ground multimedia broadcast.China's terrestrial DTV transmission standard is i.e. DTMB broadcast, technical bid
Quasi- specification is " GB20600-2006 digital television ground broadcast transmission system frame structure, Channel Coding and Modulation ".It is in Europe
Digital video broadcast terrestrial standard, that is, DVB-T broadcast.
The accurate positioning time service information, position resolution are 1 millimeter, and temporal resolution was 1 nanosecond.Due to accurate
Time service information is only significant in the synchronization of deformation measurement data transmission signal, and does not make in cell deformation monitoring terminal
With.Therefore, according to the deformation monitoring terminal of the present embodiment, when sending deformation measurement data transmission signal, wherein the essence carried
Temporal information in true orientation time service information, being further simplified resolution ratio is 1 millisecond.
Fig. 2 is digital ground multimedia broadcast broadcasting station according to the present invention structure chart.As shown in Fig. 2, the broadcast
Radio station further comprise navigation antenna, navigation enhancing server, multiplexer, DTMB driver, broadcast television signal transmitter and
Radio and television antenna.
The navigation antenna receives satellite navigation signals.
Navigation enhancing server includes navigation enhancing data acquisition module and transport stream package module.
The navigation enhances data acquisition module and obtains differential navigation amendment letter from third party differential navigation update information source
Breath.The differential navigation update information that the transport stream package module will acquire is encapsulated as differential navigation update information transport stream.
Most common third party's differential navigation update information source is continuous operation of the national mapping system by the covering whole nation
The differential data service that reference station network provides.When third party's differential navigation update information source is not present, navigation enhancing
Server can also directly obtain differential navigation update information from the signal that navigation antenna inputs, the letter inputted from navigation antenna
The mature technology that differential navigation update information is this field is obtained in number.
The biography that the multiplexer inputs differential navigation update information transport stream as program all the way and other transport stream sources
Defeated stream is multiplexed with program stream together.
The program stream map is DTMB physical layer transmission signal by the DTMB driver, and is output to radio and television letter
Number transmitter.
DTMB physical layer transmission signal is carried out power amplification by the broadcast television signal transmitter, and passes through the TV
Broadcast antenna is sent to the deformation monitoring terminal.
The navigation signal input terminal of navigation enhancing server is connected to navigation antenna and differential navigation update information source.Navigation
The output of enhancing server is connected to a transport stream input terminal of multiplexer.The input terminal of multiplexer is also connected with other transport streams
Source, multiplexer export the program stream input terminal for being connected to DTMB driver.The output end connection radio and television letter of DTMB driver
The input terminal of number transmitter.The output end of broadcast television signal transmitter is connected to radio and television antenna.
Navigation enhancing data acquisition module input terminal be directly connected to navigation enhancing server input, i.e., directly with lead
Space flight line and third party's differential navigation update information source are connected.The output of navigation enhancing data acquisition module is connected to transport stream envelope
Die-filling piece of input, the output module of transport stream package module are connected to the output of navigation enhancing server, are attached to multiplexing
One transport stream input terminal of device.
Fig. 3 is the first composition figure of deformation monitoring terminal according to the present invention.As shown in figure 3, the deformation monitoring is whole
End further comprises broadcasting and TV data broadcast reception antenna, broadcasting and TV data broadcast receiver, satellite navigation signals receiving antenna, dedicated
Satellite navigation receiver, deformation measurement data transmission signal transmitter, deformation measurement data transmission signal transmitting antenna, digital mould
Quasi- conversion module and voltage controlled crystal oscillator.
The input terminal of broadcasting and TV data broadcast receiver connects broadcasting and TV data broadcast reception antenna, and output end connects specific satellite
Navigation neceiver.The input of specific satellite navigation neceiver includes the satellite navigation signals of satellite navigation signals receiving antenna, is come
Self-deformation monitoring data transmit the pulse per second (PPS) of signal transmitter and the clock signal of voltage controlled crystal oscillator.Deformation measurement data transmission
One output of the input from specific satellite navigation neceiver of signal transmitter, another input carry out voltage controlled oscillator.Become
The output that shape monitoring data transmit signal transmitter is a kind of data transfer signal, is connected to deformation measurement data transmission letter
Number transmitting antenna, another output are the control words of voltage controlled oscillator, are connected to digital-to-analogue conversion module.Digital simulation turns
The input for changing the mold block is the control word of voltage controlled oscillator, transmits signal transmitter from deformation measurement data.Digital-to-analogue conversion
Voltage control signal is simulated in the output of module, is connected to the voltage-controlled input terminal of voltage controlled crystal oscillator.The input of voltage controlled crystal oscillator is the voltage-controlled letter of simulation
Number, digital-to-analogue conversion module is come from, output is reference clock.
Compared with common navigation receiver, the pulse per second (PPS) of specific satellite navigation neceiver is specifically from outside
Signal transmitter is transmitted from deformation measurement data, and the pulse per second (PPS) of common navigation receiver is oneself generation inside it,
And export to outside, it is used for other users.Specific satellite navigation neceiver emits with deformation measurement data transmission signal simultaneously
Machine uses the same voltage controlled crystal oscillator as reference clock.With the benefit done so, be can reduce it is more as caused by multiple clocks
Time synchronization error between the signal of a deformation measurement data transmission signal transmitter transmitting.
Broadcasting and TV data broadcast reception antenna receives the broadcasting and TV data broadcasting signal, and it is wide to pass to the broadcasting and TV data
Broadcast receiver.
The broadcasting and TV data broadcast receiver demodulates the broadcasting and TV data broadcasting signal, and extracts the difference
Navigation amendment data.
Satellite navigation signals receiving antenna receives the satellite navigation signals, and passes to the specific satellite navigation and receive
Machine.
The specific satellite navigation neceiver external input pulse per second (PPS) rising edge sampling satellite navigate observed quantity, in conjunction with
The differential navigation update information carries out navigation calculation and obtains being accurately positioned time service information, obtains itself being accurately positioned time service letter
Breath.The observed quantity mainly include in the second of satellite navigation signals accumulated carrier week number, pseudo- square.
The deformation measurement data transmission signal transmitter generates adjustment pulse per second (PPS) according to the accurate positioning time service information
Phase, so that its rising edge is synchronized to UTC Universal Time Coordinated whole moment second, and export pulse per second (PPS) pass to specific satellite navigation receive
Machine.The deformation measurement data transmission signal transmitter calculates the frequency of reference clock also according to the accurate positioning time service information
With the difference of nominal frequency, voltage-controlled control word is calculated, and voltage-controlled control word is passed into the digital-to-analogue conversion module, with adjustment
The difference of the output frequency of voltage controlled crystal oscillator, the output frequency and nominal frequency that make voltage controlled crystal oscillator minimizes.
The deformation measurement data transmission signal transmitter will be accurately positioned time service information and be transmitted by deformation measurement data
Signal is sent to the deformation monitoring center and/or ground beacon location receiver.Due to all deformation monitoring terminal seconds
The rising edge of pulse is synchronized to UTC Universal Time Coordinated whole moment second, therefore the time of multiple deformation monitoring terminals is synchronous.
The deformation measurement data transmission signal is made of the continuous modulation frame of set time length T, and the set time, length T can be whole
Millisecond is divided exactly.The relationship of start time in period and pulse per second (PPS) rising edge is fixed.
The deformation measurement data transmission signal uses a kind of spread spectrum system, and spreading code is that length is 2NIt is sparse random
Code, wherein N is the integer greater than zero.In contrast, the spreading code of existed system, general length are 2N- 1 pseudo noise code, N are
Integer, and spreading code value range is {+1, -1 }.Spreading code design is 2 by the present embodimentNRandom code.Further, in order to prop up
Hold the deformation monitoring terminal of high layout density, the present embodiment uses a kind of length for 2NSparse random code.Sparse random code with
Unlike existing spreading code, spreading ratio is specially for {+1, -1,0 }.The purpose done so is the range of choice for expanding code space,
Support more work in the deformation monitoring terminal of same frequency.
The digital-to-analogue conversion module carries out digital-to-analogue conversion to the voltage-controlled control word.Voltage-controlled control after digital-to-analogue conversion
Word controls the frequency of the reference clock of the voltage controlled crystal oscillator output.
Embodiment 2:
Referring to fig. 4, a kind of deformation monitoring terminal mainly connects including broadcasting and TV data broadcast reception antenna, broadcasting and TV data broadcasting
Receipts machine, the receiving antenna of satellite navigation, specific satellite navigation neceiver, deformation measurement data transmit signal transmitter, deformation monitoring
Data transfer signal transmitting antenna, digital-to-analogue conversion module and voltage controlled crystal oscillator.
Broadcasting and TV data broadcast reception antenna receives the broadcasting and TV data broadcasting signal, and it is wide to pass to the broadcasting and TV data
Broadcast receiver.
The broadcasting and TV data broadcast receiver demodulates the broadcasting and TV data broadcasting signal, and extracts the difference
Navigation update information.
Satellite navigation signals receiving antenna receives the satellite navigation signals, and passes to the general satellite navigation and receive
Machine.
The general satellite navigation receiver is resolved from the differential navigation update information and the satellite navigation signals
It is accurately positioned time service information out, and is sent to the deformation measurement data transmission signal transmitter.Generally, currently on the market
There is navigation neceiver that can support this function, such as Ublox M8P.
Further, the general satellite navigation receiver navigates in the rising edge sampling satellite of external input pulse per second (PPS) and observes
Amount carries out navigation calculation, and from one reference clock of external input.
The deformation measurement data transmission signal transmitter will be accurately positioned time service information and be transmitted by deformation measurement data
Information is sent to the deformation monitoring center and/or ground beacon location receiver.Deformation measurement data transmits signal hair
It penetrates machine and calculates voltage-controlled control word according to the pulse per second (PPS) of input, and voltage-controlled control word is passed into the digital-to-analogue conversion module
To adjust the frequency of voltage controlled crystal oscillator, keep it equal with nominal frequency as far as possible.
The digital-to-analogue conversion module carries out digital-to-analogue conversion to the voltage-controlled control word.Voltage-controlled control after digital-to-analogue conversion
Word controls the frequency of the reference clock of the voltage controlled crystal oscillator output.
The built-in crystal oscillator of general satellite navigation receiver all meetings simultaneously exports pulse per second (PPS), therefore different from Fig. 3.In such case
Under, the design that deformation measurement data transmits signal transmitter is also different from Fig. 3, and the present embodiment passes the deformation measurement data of Fig. 4
Defeated signal transmitter is referred to as second of deformation measurement data transmission signal transmitter.Second of deformation measurement data transmission signal hair
It penetrates machine and is tamed to carry out clock according to being accurately positioned time service information and pulse per second (PPS), it can be ensured that very high crystal oscillator frequency tames essence
Degree.
Monitoring center according to a modification of this invention receives deformation measurement data transmission signal and demodulates wherein entrained
The corresponding accurate positioning time service information of deformation monitoring terminal, and carry out deformation monitoring.
Deformation measurement data transmission its modulation format of signal of the invention is designed as one kind and is suitable as ground base navigation beacon
Modulation format, general be achieved in that is spread using spreading code, and overcomes multiple deformation monitorings by time division way
The near-far problem of spreading code between terminal.
According to the ground beacon location receiver of the present embodiment, receives and passed according to the deformation measurement data of the present embodiment
Defeated signal is captured, tracked and is resolved to deformation measurement data transmission signal, obtains the position of itself.
In the present embodiment, we illustrate second of embodiments of deformation monitoring terminal.In this embodiment,
There is general common satellite navigation receiver to generate pulse per second (PPS), compared with first way, more easily process is realized, deformation prison
Timing tracking accuracy between measured data transmission signal transmitter can decline.
Embodiment 3:
It is according to the present invention a kind of to use the building deformation using broadcasting and TV data broadcasting referring to Fig. 5, Fig. 6 and Fig. 7
The method of monitoring system, mainly comprises the steps that
1) differential navigation update information is broadcast by broadcasting and TV data broadcasting signal in the broadcasting station.As shown in fig. 6, working as institute
State broadcasting and TV data broadcasting signal be DTMB signal when, be further divided into following steps:
1.1) differential navigation update information is encapsulated as differential navigation update information transport stream by the navigation enhancing server,
And it is conveyed to the multiplexer.
1.2) multiplexer and is conveyed using differential navigation update information transport stream as program multiplexing all the way to program stream
To the DTMB driver.
1.3) program stream map is DTMB physical layer transmission signal by the DTMB driver, and is conveyed to the broadcast electricity
Depending on signal transmitter.
1.4) after the broadcast television signal transmitter carries out power amplification to the DTMB physical layer transmission signal, pass through
The radio and television antenna is sent to the deformation monitoring terminal.
2) satellite navigation signals and broadcasting and TV data that the deformation monitoring terminal reception Global Satellite Navigation System is sent are wide
Broadcast signal.
3) the deformation monitoring terminal receives the satellite navigation signals, while receiving broadcasting and TV data broadcasting and demodulating it
In differential navigation update information, rely on the satellite navigation signals and the differential navigation update information and realize height to itself
Precision positions time service, obtains itself and is accurately positioned time service information.
4) the deformation monitoring terminal itself will be accurately positioned time service information and transmit signal distribution by deformation measurement data
To the deformation monitoring center and/or the ground beacon location receiver, as shown in fig. 7, comprises following steps are as follows:
4.1) the deformation measurement data transmission signal transmitter generates pulse per second (PPS), and carries out to the pulse per second (PPS) initial whole
Second alignment.
4.2) the deformation measurement data transmission signal transmitter starts counting, and frequency is the nominal clock frequency based on crystal oscillator
Rate.Pulse per second (PPS) is generated in next pulse per second (PPS) predetermined instant.Allow next pulse per second (PPS) predetermined instant and next UTC whole second as far as possible
Alignment, to complete initial whole second alignment procedure.
4.3) the deformation measurement data transmission signal transmitter starts to send continuous modulation-frame in pulse per second (PPS) rising edge.
4.4) the specific satellite navigation neceiver acquires navigation observed quantity in pulse per second (PPS) rising edge, and resolves accurate positioning
Time service information.Accurate positioning time service information is exported and gives deformation measurement data transmission signal hair by the specific satellite navigation neceiver
Penetrate machine.
4.5) deformation measurement data transmission signal transmitter calculate time service time for being accurately positioned in time service information with
The difference of positive second, and reference clock frequency is adjusted according to the difference, reference clock frequency is adjusted, is returned to step 4.2.
The main purpose of step 4 is to make the pulse per second (PPS) of deformation measurement data transmission signal transmitter D3 accurate with minimum cost
It is synchronized to whole moment second of satellite navigation output.
5) the deformation monitoring center receives data transfer signal and carries out deformation prison to building where deformation monitoring terminal
It surveys, ground beacon location receiver receives data transfer signal and carries out itself navigator fix using it.
Summarize the present embodiment, core content are as follows: each deformation monitoring terminal reception that building different location is arranged in is defended
Star navigation signal and broadcasting and TV data broadcasting obtain itself and are accurately positioned time service information, and can be used as ground base navigation beacon using one kind
Signal system data transfer signal by the deformation monitoring terminal positioning time service information be sent to deformation monitoring center and/or
Ground beacon location receiver, so that the deformation monitoring center carries out deformation prison to building where deformation monitoring terminal
It surveys, takes into account ground beacon location receiver using the signal and carry out navigator fix.
Data transfer signal transmitted by deformation monitoring terminal in the present embodiment can be monitored for building deformation and be used,
Simultaneously navigator fix use can also be carried out for ground beacon location receiver.
Embodiment 4:
Referring to Fig. 8, a kind of building deformation monitoring system using broadcasting and TV data broadcasting, including broadcasting station, Duo Gebian
Shape monitors terminal, deformation monitoring center and ground beacon location receiver.
The broadcasting station differential navigation update information is broadcast by broadcasting and TV data broadcasting signal.
The broadcasting station is DTMB signal transmitting station.
Further, the broadcasting station mainly include navigation antenna, navigation enhancing server, multiplexer, DTMB driver,
Broadcast television signal transmitter and radio and television antenna.
The navigation antenna receives satellite navigation signals.
Navigation enhancing server mainly includes navigation enhancing data acquisition module and transport stream package module.
The navigation enhances data acquisition module and receives from third party differential navigation update information source or the navigation antenna
Satellite navigation signals in obtain differential navigation update information.The differential navigation that the transport stream package module will acquire corrects letter
Breath is encapsulated as differential navigation update information transport stream.
The biography that the multiplexer inputs differential navigation update information transport stream as program all the way and other transport stream sources
Defeated stream is multiplexed with program stream together.
The program stream map is DTMB physical layer transmission signal by the DTMB driver, and is output to radio and television letter
Number transmitter.
DTMB physical layer transmission signal is carried out power amplification by the broadcast television signal transmitter, and passes through the TV
Broadcast antenna is sent to the deformation monitoring terminal.
The deformation monitoring terminal receives the satellite navigation signals and broadcasting and TV data broadcasting that Global Satellite Navigation System is sent
Signal.
The deformation monitoring terminal is led according to the difference in the satellite navigation signals and the broadcasting and TV data broadcasting signal
Boat update information obtains itself and is accurately positioned time service information.
The time service information that itself is accurately positioned mainly includes deformation monitoring terminal self-position and temporal information.
The deformation monitoring terminal described itself will be accurately positioned time service information and transmit signal hair by deformation measurement data
It send to the deformation monitoring center and/or ground beacon location receiver.
Further, the deformation monitoring terminal mainly includes broadcasting and TV data broadcasting signal receiving antenna, broadcasting and TV data broadcasting
Signal receiver, satellite navigation signals receiving antenna, specific satellite navigation neceiver, deformation measurement data transmission signal transmitting
Machine, deformation measurement data transmission signal transmitting antenna, digital-to-analogue conversion module and voltage controlled crystal oscillator.
Broadcasting and TV data broadcasting signal receiving antenna receives the broadcasting and TV data broadcasting signal, and passes to the broadcasting and TV number
According to broadcast signal receiver.
The broadcasting and TV data broadcasting signal receiver demodulates the broadcasting and TV data broadcasting signal, and extracts described
Differential navigation update information.
Satellite navigation signals receiving antenna receives the satellite navigation signals, and passes to the specific satellite navigation and receive
Machine.
The specific satellite navigation neceiver is resolved from the differential navigation update information and the satellite navigation signals
It is accurately positioned time service information out, and is sent to the deformation measurement data transmission signal transmitter.
Further, the specific satellite navigation neceiver navigates in the rising edge sampling satellite of external input pulse per second (PPS) and observes
Amount carries out navigation calculation, and from one reference clock of external input.
The deformation measurement data transmission signal transmitter will be accurately positioned time service information and be transmitted by deformation measurement data
Signal is sent to the deformation monitoring center and/or ground beacon location receiver.Deformation measurement data transmits signal hair
It penetrates machine and passes to specific satellite navigation neceiver for pulse per second (PPS) is exported.The deformation measurement data transmission signal transmitter will be voltage-controlled
Control word passes to the digital-to-analogue conversion module.
The digital-to-analogue conversion module carries out digital-to-analogue conversion to the voltage-controlled control word.Voltage-controlled control after digital-to-analogue conversion
Word controls the frequency of the reference clock of the voltage controlled crystal oscillator output.
Further, it is further connected by a kind of Internet of Things between multiple deformation monitoring terminals, it is final to connect
A remote deformation monitoring system to internet carries out deformation monitoring.This implementation is appropriate for City-level or big
The deformation monitoring of scale overcomes single pass deformation measurement data transmission signal and sends deformation monitoring accurate positioning time service information
Coverage area it is insufficient.At this moment, the deformation monitoring center that can only receive deformation measurement data transmission signal becomes an option
Rather than it must item.Specific Internet of Things is achieved in that wide based on low-power consumption such as LORA (Low Power Long Range)
Domain Network Communication mode designs a mesh network.
The deformation monitoring center receives data transfer signal, to become to the building where deformation monitoring terminal
Shape monitoring.
The ground beacon location receiver receives data transfer signal and carries out institute using data transfer signal is received
State the navigator fix of ground beacon location receiver.
Claims (10)
1. a kind of building deformation using broadcasting and TV data broadcasting monitors system, it is characterised in that: mainly include broadcasting station, institute
State deformation monitoring terminal, deformation monitoring center and ground beacon location receiver；
The broadcasting station differential navigation update information is broadcast by broadcasting and TV data broadcasting signal.
The deformation monitoring terminal receives the satellite navigation signals, while receiving the broadcasting and TV data broadcasting and demodulating wherein
Differential navigation update information；The deformation monitoring terminal relies on the satellite navigation signals and the differential navigation update information
It realizes the high accuracy positioning time service to itself, obtains itself and be accurately positioned time service information；
The deformation monitoring terminal itself will be accurately positioned time service information and be transmitted described in signal is sent to by deformation measurement data
Deformation monitoring center and/or ground beacon location receiver；
The deformation monitoring center receives the deformation measurement data and transmits signal, thus to the building where deformation monitoring terminal
Object carries out deformation monitoring；
The ground beacon location receiver receives the deformation measurement data and transmits signal, and described by deformation monitoring number
According to transmission signal as a kind of ground beacon positioning signal, to realize self poisoning.
2. a kind of building deformation using broadcasting and TV data broadcasting according to claim 1 monitors system, it is characterised in that:
The broadcasting station is digital ground multimedia broadcast radio station, that is, broadcasting station DTMB.
3. a kind of building deformation using broadcasting and TV data broadcasting according to claim 2 monitors system, it is characterised in that:
The broadcasting station mainly includes navigation antenna, navigation enhancing server, multiplexer, DTMB driver, broadcast television signal hair
Penetrate machine and radio and television antenna；
The navigation antenna receives satellite navigation signals；
Navigation enhancing server mainly includes navigation enhancing data acquisition module and transport stream package module；
The navigation enhances data acquisition module from third party differential navigation update information source or the navigation antenna is received defends
Differential navigation update information is obtained in star navigation signal；The differential navigation update information envelope that the transport stream package module will acquire
Dress is differential navigation update information transport stream；
The transport stream that the multiplexer inputs differential navigation update information transport stream as program all the way and other transport stream sources
It is multiplexed with program stream together；
The program stream map is DTMB physical layer transmission signal by the DTMB driver, and is output to broadcast television signal hair
Penetrate machine；
DTMB physical layer transmission signal is carried out power amplification by the broadcast television signal transmitter, and passes through the television broadcasting
Antenna is sent to the deformation monitoring terminal.
4. a kind of building deformation using broadcasting and TV data broadcasting according to claim 1 monitors system, it is characterised in that:
The deformation monitoring terminal mainly includes broadcasting and TV data broadcast reception antenna, broadcasting and TV data broadcast receiver, satellite navigation signals
Receiving antenna, specific satellite navigation neceiver, deformation measurement data transmission signal transmitter, deformation measurement data transmission signal hair
Penetrate antenna, digital-to-analogue conversion module and voltage controlled crystal oscillator.
Broadcasting and TV data broadcast reception antenna receives the broadcasting and TV data broadcasting signal, and passes to the broadcasting and TV data broadcasting and connect
Receipts machine；
The broadcasting and TV data broadcast receiver demodulates the broadcasting and TV data broadcasting signal, and extracts the differential navigation
Update information；
Satellite navigation signals receiving antenna receives the satellite navigation signals, and passes to the specific satellite navigation neceiver；
The specific satellite navigation neceiver relies on the satellite navigation signals and differential navigation update information, and resolving obtains itself
It is accurately positioned time service information；
The deformation measurement data transmission signal transmitter generates the phase of adjustment pulse per second (PPS) according to the accurate positioning time service information
Position, makes its rising edge be synchronized to UTC Universal Time Coordinated whole moment second, and export pulse per second (PPS) and pass to specific satellite navigation neceiver；
The deformation measurement data transmission signal transmitter calculates the frequency of reference clock also according to the accurate positioning time service information
The difference of rate and nominal frequency calculates voltage-controlled control word, and voltage-controlled control word is passed to the digital-to-analogue conversion module, to adjust
The difference of the output frequency of whole voltage controlled crystal oscillator, the output frequency and nominal frequency that make voltage controlled crystal oscillator minimizes；
The deformation measurement data transmission signal transmitter will be accurately positioned time service information and transmit signal by deformation measurement data
It is sent to the deformation monitoring center and/or ground beacon location receiver.
5. a kind of building deformation using broadcasting and TV data broadcasting monitors system, the specific satellite according to claim 4
Navigation neceiver relies on the satellite navigation signals and differential navigation update information, and resolving obtains itself being accurately positioned time service letter
Breath, it is characterised in that:
The specific satellite navigation neceiver external input pulse per second (PPS) rising edge sampling satellite navigate observed quantity, in conjunction with described
Differential navigation update information carries out navigation calculation and obtains being accurately positioned time service information, obtains itself and is accurately positioned time service information；Institute
State observed quantity mainly and include in the second of satellite navigation signals accumulated carrier week number and pseudo- square.
6. a kind of ground used in claim 1 to the 5 building deformation monitoring system using broadcasting and TV data broadcasting
Navigation beacon, it is characterised in that: ground base navigation beacon is that the deformation measurement data transmits signal；The deformation measurement data passes
Defeated signal is made of the continuous modulation frame of set time length T, and set time length T can be divided exactly by whole millisecond, and the period starts
The relationship of moment and pulse per second (PPS) rising edge is fixed；It is 2 that the spreading code of the deformation measurement data transmission signal, which is length,N's
Sparse spreading code；Wherein N is the integer greater than zero.
7. it is a kind of using the method for utilizing the building deformation of broadcasting and TV data broadcasting to monitor system described in claim 1 to 6, it is special
Sign is, mainly comprises the steps that
1) differential navigation update information is broadcast by broadcasting and TV data broadcasting signal in the broadcasting station；
2) the deformation monitoring terminal receives the satellite navigation signals and broadcasting and TV data broadcasting letter that Global Satellite Navigation System is sent
Number；
3) the deformation monitoring terminal is obtained according to the differential navigation update information in the satellite navigation signals, broadcasting and TV data broadcasting
It is derived from body and is accurately positioned time service information；
4) the deformation monitoring terminal described itself will be accurately positioned time service information and transmit signal transmission by deformation measurement data
To the deformation monitoring center and/or the ground beacon location receiver；
6) the deformation monitoring center receive the deformation measurement data transmission signal to building where deformation monitoring terminal into
Row deformation monitoring, ground beacon location receiver receive the deformation measurement data transmission signal and carry out itself using it
Navigator fix.
8. a kind of method of building deformation monitoring system using broadcasting and TV data broadcasting according to claim 7, special
Sign is that the broadcasting station is as follows by the key step that broadcasting and TV data broadcasting signal broadcasts differential navigation update information:
1) differential navigation update information is encapsulated as differential navigation update information transport stream by the navigation enhancing server, and is conveyed
To the multiplexer；
2) multiplexer and is conveyed to described using differential navigation update information transport stream as program multiplexing all the way to program stream
DTMB driver；
3) program stream map is DTMB physical layer transmission signal by the DTMB driver, and is conveyed to the broadcast television signal
Transmitter；
4) after the broadcast television signal transmitter carries out power amplification to the DTMB physical layer transmission signal, by described wide
It broadcasts television antenna and is sent to the deformation monitoring terminal.
9. a kind of method of building deformation monitoring system using broadcasting and TV data broadcasting according to claim 7, special
Sign is that the deformation monitoring terminal described itself will be accurately positioned time service information and transmit signal transmission by deformation measurement data
Key step to the deformation monitoring center and/or the ground beacon location receiver is as follows:
1) the deformation measurement data transmission signal transmitter generates pulse per second (PPS), and it is right to carry out the initial whole second to the pulse per second (PPS)
Together；
2) the deformation measurement data transmission signal transmitter starts counting, and frequency is the nominal clock frequency based on crystal oscillator；?
Next pulse per second (PPS) predetermined instant generates pulse per second (PPS)；
3) the deformation measurement data transmission signal transmitter starts to send continuous modulation-frame in pulse per second (PPS) rising edge；
4) the specific satellite navigation neceiver acquires navigation observed quantity in pulse per second (PPS) rising edge, and resolves and be accurately positioned time service letter
Breath；Accurate positioning time service information is exported and transmits signal transmitter to deformation measurement data by the specific satellite navigation neceiver；
5) the deformation measurement data transmission signal transmitter calculates the time service time and positive second being accurately positioned in time service information
Difference, and reference clock frequency is adjusted according to the difference, reference clock frequency is adjusted, is returned to step 2.
10. a kind of method of building deformation monitoring system using broadcasting and TV data broadcasting according to claim 7, described
Deformation monitoring terminal itself is accurately positioned time service information, including its location information and temporal information, and location information resolution ratio is 1 milli
Rice, temporal information resolution ratio were 1 nanosecond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562361.3A CN108955623B (en) | 2018-06-04 | 2018-06-04 | Building deformation monitoring method and system using broadcast and television data broadcasting and foundation navigation beacon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810562361.3A CN108955623B (en) | 2018-06-04 | 2018-06-04 | Building deformation monitoring method and system using broadcast and television data broadcasting and foundation navigation beacon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108955623A true CN108955623A (en) | 2018-12-07 |
| CN108955623B CN108955623B (en) | 2020-06-23 |
Family
ID=64492766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810562361.3A Active CN108955623B (en) | 2018-06-04 | 2018-06-04 | Building deformation monitoring method and system using broadcast and television data broadcasting and foundation navigation beacon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108955623B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320540A (en) * | 2019-07-23 | 2019-10-11 | 南京九度卫星科技研究院有限公司 | The centralized Differential positioning method of high-precision |
| CN110515074A (en) * | 2019-09-30 | 2019-11-29 | 符依苓 | A kind of Light deformation telemetry system and method based on wireless synchronization technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004297135A (en) * | 2003-03-25 | 2004-10-21 | Sanyo Electric Co Ltd | Portable television terminal device |
| CN202551246U (en) * | 2012-03-14 | 2012-11-21 | 深圳市数视通科技股份有限公司 | DYMB (Digital Terrestrial Multimedia Broadcasting) information distribution system |
| CN105444726A (en) * | 2014-08-28 | 2016-03-30 | 中建四局第六建筑工程有限公司 | Method and system for building structure deformation monitoring based on Beidou satellite |
| CN106850111A (en) * | 2017-01-10 | 2017-06-13 | 上海华测导航技术股份有限公司 | One kind is based on city CDR wireless broadcast system GNSS differential data transmission methods |
| CN106908807A (en) * | 2017-02-28 | 2017-06-30 | 清华大学 | Pseudo-code modulates navigator fix and deformation monitoring, monitoring terminal, monitoring center, navigation neceiver and code control data corporation |
| CN206514839U (en) * | 2017-02-28 | 2017-09-22 | 四川建筑职业技术学院 | A kind of building DEFORMATION MONITORING SYSTEM positioned based on big-dipper satellite |
-
2018
- 2018-06-04 CN CN201810562361.3A patent/CN108955623B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004297135A (en) * | 2003-03-25 | 2004-10-21 | Sanyo Electric Co Ltd | Portable television terminal device |
| CN202551246U (en) * | 2012-03-14 | 2012-11-21 | 深圳市数视通科技股份有限公司 | DYMB (Digital Terrestrial Multimedia Broadcasting) information distribution system |
| CN105444726A (en) * | 2014-08-28 | 2016-03-30 | 中建四局第六建筑工程有限公司 | Method and system for building structure deformation monitoring based on Beidou satellite |
| CN106850111A (en) * | 2017-01-10 | 2017-06-13 | 上海华测导航技术股份有限公司 | One kind is based on city CDR wireless broadcast system GNSS differential data transmission methods |
| CN106908807A (en) * | 2017-02-28 | 2017-06-30 | 清华大学 | Pseudo-code modulates navigator fix and deformation monitoring, monitoring terminal, monitoring center, navigation neceiver and code control data corporation |
| CN206514839U (en) * | 2017-02-28 | 2017-09-22 | 四川建筑职业技术学院 | A kind of building DEFORMATION MONITORING SYSTEM positioned based on big-dipper satellite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320540A (en) * | 2019-07-23 | 2019-10-11 | 南京九度卫星科技研究院有限公司 | The centralized Differential positioning method of high-precision |
| CN110515074A (en) * | 2019-09-30 | 2019-11-29 | 符依苓 | A kind of Light deformation telemetry system and method based on wireless synchronization technology |
| CN110515074B (en) * | 2019-09-30 | 2024-02-20 | 符依苓 | Micro-deformation telemetry system and method based on wireless synchronization technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108955623B (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110235066B (en) | Time synchronization system and transmission device | |
| US6671291B1 (en) | Method and apparatus for sequentially synchronized network | |
| CN108076445B (en) | GNSS signal transmission using wireless communication network | |
| CN108536003A (en) | Accurate time transmission system and method and time service service system | |
| JP2011022151A (en) | System and method for incremental broadcast of gps navigation data in cellular network | |
| CA2554336A1 (en) | Transfer of calibrated time information in a mobile terminal | |
| CN105871495A (en) | Time synchronization method, communication ground station and user terminal | |
| CN101843029A (en) | System and method for distributing time and frequency over a network | |
| CN101344584A (en) | Navigation positioning method | |
| KR101001007B1 (en) | Position location using broadcast television signals and mobile telephone signals | |
| CN103630915B (en) | A method of carrying out navigator fix using digital frequency modulation broadcast | |
| CN110808803A (en) | High-reliability and high-performance reference clock system | |
| CN108955623A (en) | A kind of building deformation monitoring method, system and ground base navigation beacon using broadcasting and TV data broadcasting | |
| CN103220774A (en) | Precise timing method and precise timing system with assistance of cellular network | |
| EP2679059A1 (en) | Methods and arrangement for supporting base station synchronization by use of long wave signaling | |
| CN104166343A (en) | High-precision time synchronization system and method for distributed positioning system | |
| US20220247482A1 (en) | Method for piloting from bypass in a network based on satellite load platform | |
| CN114002939A (en) | Method and system for realizing transparent forwarding satellite time service | |
| KR20100021325A (en) | Method of the in building navigation using gps generator | |
| CN109981514A (en) | A kind of cell DMB single frequency network implementation method based on local area network | |
| US7274327B2 (en) | Method and apparatus for determining location in a satellite communication system | |
| SA98190417A (en) | Digital broadcast system using satellite direct abroadcast system and terrestrial radiation repeater system | |
| CN203734670U (en) | L-frequency band satellite data multimedia system | |
| KR20070069732A (en) | Dissemination method of coordinated universal time via communication satellite | |
| KR101099175B1 (en) | Transfer of calibrated time information in a mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |