CN104168101B - The bidirectional transmission system of coal mine fully-mechanized mining face data and control command data - Google Patents
The bidirectional transmission system of coal mine fully-mechanized mining face data and control command data Download PDFInfo
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- CN104168101B CN104168101B CN201410429708.9A CN201410429708A CN104168101B CN 104168101 B CN104168101 B CN 104168101B CN 201410429708 A CN201410429708 A CN 201410429708A CN 104168101 B CN104168101 B CN 104168101B
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Abstract
The bidirectional transmission system of coal mine fully-mechanized mining face data and control command data is using two-band and the power cable carrier communication system of dual input output interface " full duplex " pattern.Using AC 1140V or AC 3300V coal-winning machine power cable, for coal mine fully-mechanized mining face data and the transmitted in both directions of control command data.System includes the path that two are one-way communication, by double CAN processing modules, the nucleus module of DSPIC single-chip microcomputers first, mode of operation selecting module, the core processing modules of FPGA second, DAC output buffers, ADC input buffer circuits, double DAC signal conditioning circuits modules, double ADC signal conditioning circuit modules, signal conditioning circuit selecting module and power carrier high pressure termination power module composition；" main cell site " that the system configuration is integrated with " main hair with from receive " and " from cell site " two kinds of one-way communication modes being integrated with " being received from hair with main ".
Description
Technical field
The present invention relates to underground coal mine comprehensive mechanical coal mining face（Abbreviation fully mechanized coal face）, specifically fully mechanized coal face data and control
The sensing data and control command of the coal-winning machine safety monitoring system of the transmission of order, more specifically colliery performing comprehensive coal mining face
The bidirectional transmission system of data.
Background technology
Due to the continuous improvement of Modern Pit fully-mechanized mining working unit yield, the requirement to coal-winning machine technical performance is also got over
Come higher, the installed power of coal-winning machine is also being improved constantly, and more complicated, and high standard mining face equipment is to realize that high yield is steady
Produce efficient Reliable guarantee.In order to ensure coal-winning machine is run in optimum state, coal-winning machine fault rate is reduced, maintenance time is reduced,
Need to use coal-winning machine safety monitoring system, carry out online monitoring of working condition and quick fault diagnosis to coal-winning machine, and must
Will when modulate coal-winning machine operational factor, to ensure that coal-winning machine is operated in optimum condition.
At present, because the production environment condition under mine is sufficiently complex severe, the underground communica tion network of domestic large-scale mine
Although having been extended to crossheading, in working face to communicating extremely difficult between crossheading, mainly environment on coalface of tracing it to its cause
It is complicated, dust is big, wetness is high, both horizontally and vertically choppy, radio communication multipath effect and decay it is very serious,
Have a strong impact on the validity and reliability of communication system, and the cable powered by conventional energy traditional multicore cable control integrated with control cored wire
Mode processed, because control line is thinner, mechanical strength is relatively lower, equal failure of breaking often occurs, and searches difficult, maintenance cost
Height, so that influence production.Another aspect coal-winning machine operating voltage rises to 3.3kV grades, and work cored wire is to control in power cable
Cored wire conducts common-mode voltage and nocuity leakage current probability increases, and the life security to control device safety and operating personnel is caused
Great threat.
In order to solve the above problems, existing system is generally only one-way transmission coal-winning machine control command or only one-way transmission
Sensing data function, using one-segment half-duplex mode of operation.The problem of this mode of operation is present be：Can not be simultaneously bi-directionally
Transmission, speed is slow.In order to the data message transmission of the various sensors of efficient transmission coal-winning machine monitoring system in time
To crossheading, and in emergency circumstances transmission ground control command control coal-winning machine or the coal-winning machine operation of dynamic adjustment at any time in time
Parameter, and make its work optimum state, this is accomplished by a kind of system and simultaneously bi-directionally can independently carried out when data transfer,
It will not be interfered, that is, reached when up to up to a hundred sensing datas of simultaneous transmission and coal-winning machine control command with reaching
" full duplex " communication pattern on to meaning, rather than existing system alternate transport " half-duplex " pattern.
The content of the invention
Mutually passed in time to solve performing comprehensive coal mining face to the data of high-power coal cutter safety monitoring system between crossheading
Defeated the problem of, overcome traditional split conductor control mode and the serious shortcoming and deficiency of communication multipath fading, overcome
One-segment half-duplex mode of operation can not be transmitted simultaneously bi-directionally and slow-footed disadvantage so that the data of monitoring system can be high
Effect, is rapidly transmitted to crossheading, and simultaneous transmission ground or crossheading control command to coal-winning machine, the present invention provides a kind of
The bidirectional transmission system of coal mine fully-mechanized mining face data and control command data.
The present invention using two-band and dual input output interface " full duplex " pattern power cable carrier communication
System.Using AC-1140V or AC-3300V coal-winning machine power cable, supervised safely for coal mine fully-mechanized mining face transmission coal-winning machine
The sensing data of control system is to crossheading Surveillance center and receives the coal-winning machine control command from crossheading or ground simultaneously
Data transfer to coal-winning machine is controlled.
The bidirectional transmission system of coal mine fully-mechanized mining face of the present invention data and control command data is unidirectional including two
The path of communication, by double CAN processing modules, the nucleus module of DSPIC single-chip microcomputers first, mode of operation selecting module, FPGA second
Core processing module, DAC output buffers, ADC input buffer circuits, double DAC signal conditioning circuits modules, double ADC signals
Conditioning circuit module, signal conditioning circuit selecting module and power carrier high pressure termination power module composition；
Double CAN processing modules of connection CAN network are also connected with the nucleus module of DSPIC single-chip microcomputers first；
The nucleus module of DSPIC single-chip microcomputers first transmits data, work with the core processing modules of FPGA second by double-serial port
Mode selection module connects the nucleus module of DSPIC single-chip microcomputers first and the core processing modules of FPGA second respectively；
DAC output buffers and ADC input buffer circuits are all connected with the core processing modules of FPGA second, and DAC is defeated
Go out buffer circuit and be also connected with double DAC signal conditioning circuit modules, ADC input buffer circuits are also connected with double ADC signal modulate circuits
Module；
Double DAC signal conditioning circuits modules and double ADC signal conditioning circuit modules are all connected with signal conditioning circuit selection mould
Block and power carrier high pressure termination power module；
The DC+24V double CAN processing modules of power circuit block connection, the nucleus module of DSPIC single-chip microcomputers first and FPGA
Second core processing module, is system power supply；
The system is mounted to AC-1140V or AC-3300V coal mining by power carrier high pressure termination power module
On any correspondence two-phase in machine three-phase three-wire system power cable, power cable carrier communication is realized；
" main cell site " that the system configuration is integrated with " main hair with from receive " and it is integrated with " being received from hair with main "
" from cell site " two kinds of one-way communication modes.
Further, wherein " main to receive " of " main hair " correspondence " from cell site " of " main cell site ", is 3KHZ- using frequency range
150KHZ；" from the hair " correspondence " main cell site " " from receiving " of " from cell site ", is 250KHZ-450KHZ using frequency range；
Accordingly, the core processing modules of FPGA second are integrated with the OFDM carrier datas tune of 3KHZ-150KHZ frequency ranges simultaneously
System, demodulation module, and the carrier data OFDM of 250KHZ-450KHZ frequency ranges is modulated, demodulation module.
The system by mode of operation selecting module determine the system configuration for " main hair with from receive " one still " from hair with
The working system that main receipts " are integrated, and control transmitting simultaneously, receiving conditioning circuit selecting module.
When the integral pattern of selection " main hair with from receive ", then the system is operated in coal winning machine on integrated excavating coal face as " main cell site "
First, connection is mined monitoring communication CAN network, " main hair equipment " in simultaneity factor software systems active program and " from
Receiving unit ", and the DAC1 signal conditioning circuits of control signal modulate circuit selecting module selection simultaneously, " main hair equipment " is presented as：
One side connection coal-winning machine safety monitoring system CAN system data network of the network of system CAN 1, in addition while connection DSPIC monolithics
Machine the first processing core module, the nucleus module of DSPIC single-chip microcomputers first delivers to the nucleus modules of FPGA second after handling data well
The OFDM modulation of baseband signal is carried out, band limits 3KHZ-150KHZ is exported to DAC1 output buffers, DAC1 letters afterwards
The processing of number conditioning circuit module, then sent by power carrier high pressure termination power module to power cable；
Another aspect signal conditioning circuit selecting module selects ADC1 signal conditioning circuits module to receive frequency range
Data between 250KHZ-450KHZ, and be transferred to the nucleus modules of FPGA second and be demodulated, pass through DSPIC single-chip microcomputers afterwards
First nucleus module carries out secondary unpacking processing and is sent to coal-winning machine by CAN2 networks, is controlled accordingly.
When the Systematic selection " receives " integral pattern from hair with main, then the system is operated in addition as " from cell site "
First（Crossheading Surveillance center or other places）, simultaneity factor software systems activation " from hair equipment " and " main receiving unit ", and
Control signal modulate circuit selecting module and DAC2 signal conditioning circuits are selected simultaneously, " from hair equipment " is presented as：CAN2 networks
One side connect crossheading monitoring system CAN system data network, receive coal-winning machine control command, in addition on one side connect DSPIC
The nucleus module of single-chip microcomputer first, the nucleus module of DSPIC single-chip microcomputers first delivers to the nucleus modules of FPGA second after handling data well
The OFDM modulation of baseband signal is carried out, frequency range is 250KHZ-450KHZ, then is sent by power carrier high pressure termination power module
To power cable；Another aspect signal conditioning circuit selecting module selection ADC2 signal conditioning circuits module receives frequency range and existed
The sensing data of coal-winning machine monitoring system between 3KHZ-150KHZ, and be transferred to the nucleus modules of FPGA second and be demodulated,
Secondary unpacking processing is carried out by the nucleus module of DSPIC single-chip microcomputers first afterwards crossheading Surveillance center is sent to by CAN1 networks
CAN network.
Described OFDM modulates baseband signals technology general principles are：During transmission, by DSPIC single-chip microcomputers the first core mould
The data of block handling ordered are transported to after the nucleus modules of FPGA second by serial ports, mainly by data scrambling, RS codings,
Mapping is modulated after convolutional encoding, data interlacing, IFFT inverse discrete fourier transforms insert cyclic prefix and adding window etc.
Processing, exports and gives the processing of DAC interlock circuits.Then the corresponding signal of signal progress gathered by ADC is synchronously detected during reception,
Cyclic prefix is removed, FFT, channel estimation, demapping is deinterleaved, the operation such as channel decoding.
The power carrier high pressure termination power module is multiple with " capacitance-resistance is pouring-in to be coupled " using phase-phase, " electromagnetic coupled "
The mode of coupling is closed, can be mounted to when being work on power cable on arbitrary corresponding two-phase can be carried out
Communication, such as A-A and B-B or A-A and C-C or B-B and C-C.
Monitoring system is not updated for convenience to the old equipment of CAN network transmission, realizes compatibility, the present invention is also
Including the double RS485 buses parallel with dual CAN bus.
DAC signal conditioning circuits module of the present invention, including DAC process circuits, the active low pass being linked in sequence
Wave circuit, single-ended signal turn differential signal circuit and power amplification circuit, and wherein single-ended signal turns differential signal circuit mainly general
The unipolar signal of DAC outputs switchs to differential signal and is transmitted, and to improve anti-common mode disturbances, and is entered using radio-frequency transformer
Row conversion, power amplification circuit powered using DC+24V, to cause the signal amplitude of output to be powered principal voltage DC+ close to power supply
24V, improves the distance of carrier signal transmission, reduces relay system, wherein DAC1 active low-pass filter circuits are 250KHZ-
450KHZ responds frequency range；DAC2 active low-pass filter circuits are that 3KHZ-150KHZ responds frequency range.
Described ADC signal conditioning circuit module, including be linked in sequence low-noise amplification circuit, active bandpass filiter electricity
Road, differential signal turn single-ended signal circuit, AGC automatic gain control circuits and ADC process circuits.The active band logical filters of wherein ADC1
Wave circuit is that 3KHZ-150KHZ responds frequency range；ADC2 active bandpass filiters circuit is that 250KHZ-450KHZ responds frequency range.
The whole system of the present invention is placed within explosion-proof cabinet, and explosion-proof cabinet is divided into left high-pressure area, right low voltage control area
Domain and intermediate isolating region.
Compared with prior art, the present invention has the advantage that：
1st, system integration dual-channel transmitter of the invention, two-channel receiver be in one, and using at a distance of 100KHZ with
On dual carrier frequency range separate, the data and coal-winning machine control command data of simultaneous transmission coal-winning machine monitoring system, data transfer
The serial data stream of high speed is divided into low speed by safety and reliability, the modulation system used for orthogonal frequency division multiplex OFDM technology
Parallel data stream, data are distributed on multiple orthogonal subcarriers and carry out parallel transmission, multipath is overcome with stronger
Effect, resists the ability of intersymbol interference, so that the interference between greatly reducing subcarrier, is adjusted relative to traditional spread spectrum
Equal technology drastically increases the reliability of data transfer.
2nd, system of the invention possesses CAN baud rate self-adapting detectability, without separately being repaiied according to different clients
Change, be further provided with RS485 interfaces, the convenient monitoring system that do not update is therefore compatible to the old equipment of CAN network transmission
Property is stronger.
3rd, detecting system of the invention deployment is flexible, and without extra wiring, being directly mounted to power cable just can be direct
Use, saved split conductor and the cost that serious or deployment wireless network node is brought is lost.
4th, the OFDM modulation systems that system of the invention is used, the more traditional multi-carrier modulation scheme of transmission rate has significantly
The raising of degree.
5th, the present invention uses FPGA as encoding and decoding core, relative to DSP and other controllers, with programming spirit
Living, speed is fast, construction cycle short feature；And the telecommunication circuit that some are designed using integrated power carrier chip, because its PLC is logical
The parameter of some physical layers of letter system, all has been cured in the chips, for specific channel, it is impossible to timely modification parameter,
Therefore portable is poor；The system is using FPGA as core, and with user oriented, Environment Oriented, alterability, Scalability are clever
The advantage such as living.
6th, system of the invention is directly mounted to power cable, and without using thinner control line, fault rate is low, also allows for dimension
Shield.
Brief description of the drawings
Fig. 1 is Transmission system fundamental block diagram of the invention；
Fig. 2 is that system configuration is " main cell site " operational mode figure；
Fig. 3 is that system configuration is operational mode figure " from cell site "；
Fig. 4 is DAC signal output conditioning circuit module theory diagrams, and DAC1 is identical with DAC2；
Fig. 5 is ADC signal input conditioning circuit module theory diagram, and ADC1 is identical with ADC2；
Fig. 6 is system work line theory diagram.
Embodiment
See Fig. 1.The present invention system include two be one-way communication path：CAN1/RS485-DAC1 and DAC2；
CAN2/RS485-ADC1 and ADC2.By double CAN processing modules CAN1/RS485 and CAN2/RS485, DSPIC single-chip microcomputer first
Nucleus module, mode of operation selecting module, the core processing modules of FPGA second, DAC output buffers, ADC input buffering electricity
Road, double DAC signal conditioning circuits module DAC1 and DAC2, double ADC signal conditioning circuit module ADC1 and ADC2, signal condition electricity
Road selecting module and power carrier high pressure termination power module composition；
Double CAN processing modules of connection CAN network are also connected with the nucleus module of DSPIC single-chip microcomputers first；
The nucleus module of DSPIC single-chip microcomputers first passes through double-serial port with the nucleus modules of FPGA second（Serial ports 1 and serial ports 2）Transmission
Data, mode of operation selecting module connects the nucleus module of DSPIC single-chip microcomputers first and the nucleus modules of FPGA second respectively；
DAC output buffers and ADC input buffer circuits are all connected with the nucleus modules of FPGA second, and DAC outputs are slow
Rush that circuit is also connected with double DAC signal conditioning circuit module DAC1 and DAC2, ADC input buffer circuit are also connected with double ADC signals and adjusted
Manage circuit module ADC1 and ADC2；
Double DAC signal conditioning circuits modules and double ADC signal conditioning circuit modules are all connected with signal conditioning circuit selection mould
Block and power carrier high pressure termination power module；
The DC+24V double CAN processing modules of power circuit block connection, the nucleus module of DSPIC single-chip microcomputers first and FPGA
Second nucleus module, is system power supply；
The system is mounted to AC-1140V or AC-3300V coal mining by power carrier high pressure termination power module
On any correspondence two-phase in machine three-phase three-wire system power cable, power cable carrier communication is realized；
System by the path that two are one-way communication, configuration with " main hair with from receive " being integrated " main cell site " and
" from cell site " the two kinds of one-way communication modes being integrated with " being received from hair with main ".
Whole system is placed within the explosion-proof cabinet of cuboid being welded by steel plate, and explosion-proof cabinet is divided into left high-pressure area
With right low voltage control region, and intermediate isolating region.
The left high-pressure area of system is mounted to AC-1140V or AC-3300V coal-winning machine three-phase three-wire system power cable
In any correspondence two-phase on, such as A-A and B-B or A-A and C-C or B-B and C-C（Referring to Fig. 6）.Right low voltage control
The external DC+24V dc sources in region as low voltage control area power supply.
See Fig. 2." main transmitting of the system configuration for " main hair with from receive " one is determined by mode of operation selecting module
Stand " mode of operation.
First the system is operated in coal winning machine on integrated excavating coal face as " main cell site ", and connection, which is mined, monitors communication CAN net
" main hair equipment " and " from receiving unit " in network, simultaneity factor software systems active program, and control signal modulate circuit simultaneously
Selecting module selects DAC1 signal conditioning circuit modules, and " main hair equipment " is presented as：One side connection of the network of system CAN 1 is mined
Machine safety monitoring system CAN system data network, in addition while connection DSPIC single-chip microcomputer the first processing core modules, DSPIC is mono-
The nucleus module of piece machine first delivers to the OFDM tune that the nucleus modules of FPGA second carry out baseband signal after handling data well by serial ports 1
System, band limits 3KHZ-150KHZ is exported to DAC1 output buffers, DAC1 signal conditioning circuit resume modules afterwards, then
Sent by power carrier high pressure termination power module to power cable；
Another aspect signal conditioning circuit selecting module selects ADC1 signal conditioning circuits module to receive frequency range
Data between 250KHZ-450KHZ, and be transferred to the nucleus modules of FPGA second and be demodulated, DSPIC is delivered to by serial ports 2 afterwards
The nucleus module of single-chip microcomputer first, carries out secondary unpacking processing by the nucleus module of DSPIC single-chip microcomputers first and is sent out by CAN2 networks
Coal-winning machine is given, is controlled accordingly.
See Fig. 3.By mode of operation selecting module determine the system configuration for " from hair with it is main receive " one " from transmitting
Stand " mode of operation.
The system as " from cell site " be operated in it is other first（Crossheading Surveillance center or other places）, simultaneity factor
Software systems activation " from hair equipment " and " main receiving unit ", and control signal modulate circuit selecting module and select DAC2 to believe simultaneously
Number conditioning circuit module, " from hair equipment " is presented as：One side of CAN2 networks connects the CAN system data network of crossheading monitoring system
Network, receives coal-winning machine control command, in addition while connection DSPIC the first nucleus modules of single-chip microcomputer, the core of DSPIC single-chip microcomputers first
The OFDM modulation that the nucleus modules of FPGA second carry out baseband signal is delivered to after the good data of resume module, frequency range is 250KHZ-
450KHZ, then sent by power carrier high pressure termination power module to power cable；Another aspect signal conditioning circuit is selected
Select the sensing that module selection ADC2 signal conditioning circuits module receives coal-winning machine monitoring system of the frequency range between 3KHZ-150KHZ
Device data, and be transferred to the nucleus modules of FPGA second and be demodulated, pass through the nucleus module of DSPIC single-chip microcomputers first afterwards and carry out two
Secondary unpacking processing is sent to crossheading Surveillance center CAN network by CAN1 networks.
See Fig. 4.DAC signal conditioning circuit modules, including the DAC process circuits being linked in sequence（DAC）, active low-pass filter
Circuit（Active low-pass filter）, single-ended signal turn differential signal circuit（Single-ended transfer difference）And power amplification circuit, wherein single-ended
Signal turns differential signal circuit to be changed using radio-frequency transformer, and power amplification circuit is powered using DC+24V.In DAC signals
In conditioning circuit module, signal is inputted from DAC, last amplified output.
See Fig. 5.ADC signal conditioning circuit module, including the low-noise amplification circuit being linked in sequence（Difference low noise is amplified）, have
Source bandwidth-limited circuit（Active bandpass filiter）, differential signal turn single-ended signal circuit（Difference turns single-ended）, AGC automatic gain controls
Circuit processed（AGC）With ADC process circuits（ADC）.In ADC signal conditioning circuit module, signal amplifies from difference low noise to be inputted,
Most exported afterwards after ADC.
See Fig. 6.By CAN1/485, coal winning machine on integrated excavating coal face is sent by being operated in the main cell site of coal winning machine on integrated excavating coal face first
Various sensing datas in safety monitoring system, by being received from cell site；Meanwhile, by CAN2/485, by be operated in ground or
The control command from cell site transmission ground or crossheading monitoring in case of emergency of person's crossheading first, is connect by main cell site
Receive.In said process, the transmission of data passes through AC-1140V/AC-3300V three-phases（A/B/C）Three-wire system power cable is completed.
Claims (1)
1. the bidirectional transmission system of coal mine fully-mechanized mining face data and control command data, it is characterised in that：The system includes two
Be the path of one-way communication, by double CAN processing modules, the nucleus module of DSPIC single-chip microcomputers first, mode of operation selecting module,
The nucleus modules of FPGA second, DAC output buffers, ADC input buffer circuits, double DAC signal conditioning circuits modules, double ADC
Signal conditioning circuit module, signal conditioning circuit selecting module and power carrier high pressure termination power module composition；
Double CAN processing modules of connection CAN network are also connected with the nucleus module of DSPIC single-chip microcomputers first；
The nucleus module of DSPIC single-chip microcomputers first transmits data, mode of operation selection with the nucleus modules of FPGA second by double-serial port
Module connects the nucleus module of DSPIC single-chip microcomputers first and the nucleus modules of FPGA second respectively；
DAC output buffers and ADC input buffer circuits are all connected with the nucleus modules of FPGA second, and DAC output buffering electricity
Road is also connected with double DAC signal conditioning circuit modules, and ADC input buffer circuits are also connected with double ADC signal conditioning circuit modules；
Double DAC signal conditioning circuits modules and double ADC signal conditioning circuit modules be all connected with signal conditioning circuit selecting module and
Power carrier high pressure termination power module；
The DC+24V double CAN processing modules of power circuit block connection, the nucleus module of DSPIC single-chip microcomputers first and FPGA second
Nucleus module, is system power supply；
The system is mounted to AC-1140V or AC-3300V coal-winning machine three by power carrier high pressure termination power module
On any correspondence two-phase in three-phase three-wire system power cable, power cable carrier communication is realized；
" main cell site " that the system configuration is integrated with " main hair with from receive " and with " being received from hair with main " be integrated " from hair
Penetrate station " two kinds of one-way communication modes；
Wherein " main to receive " of " main hair " correspondence " from cell site " of " main cell site ", is 3KHZ-150KHZ using frequency range；" from hair
Penetrate station " " from hair " correspondence " main cell site " " from receiving ", the use of frequency range is 250KHZ-450KHZ；
The nucleus modules of FPGA second are integrated with the OFDM carrier datas modulation of 3KHZ-150KHZ frequency ranges, demodulation module simultaneously, and
The carrier data OFDM modulation of 250KHZ-450KHZ frequency ranges, demodulation module；
System determines that the system configuration still " is received " for " main hair with from receive " one from hair with main by mode of operation selecting module
The working system being integrated, and control signal modulate circuit selecting module simultaneously；
When the integral pattern of selection " main hair with from receive ", then the system is operated in coal winning machine on integrated excavating coal face one as " main cell site "
Then, connection is mined monitoring communication CAN bus network, " main hair equipment " in simultaneity factor software systems active program and " from receipts
Equipment ", and the DAC1 signal conditioning circuit modules of control signal modulate circuit selecting module selection simultaneously, " main hair equipment " embodies
For：One side connection coal-winning machine safety monitoring system CAN system data networks of the network of system CAN 1, in addition while connection DSPIC
Single-chip microcomputer the first processing core module, the nucleus module of DSPIC single-chip microcomputers first delivers to the cores of FPGA second after handling data well
Core module carry out baseband signal OFDM modulation, band limits 3KHZ-150KHZ, export afterwards to DAC1 output buffers,
DAC1 signal conditioning circuit resume modules, then sent by power carrier high pressure termination power module to power cable；
Another aspect signal conditioning circuit selecting module selects ADC1 signal conditioning circuits module to receive frequency range 250KHZ-
Data between 450KHZ, and be transferred to the nucleus modules of FPGA second and be demodulated, pass through the core of DSPIC single-chip microcomputers first afterwards
Module carries out secondary unpacking processing and is sent to coal-winning machine by CAN2 networks, is controlled accordingly；
When the Systematic selection " receives " integral pattern from hair with main, then the system is operated in other one as " from cell site "
Then, simultaneity factor software systems activation " from hair equipment " and " main receiving unit ", and control signal modulate circuit selecting module simultaneously
DAC2 signal conditioning circuit modules are selected, " from hair equipment " is presented as：One side connection crossheading monitoring system of CAN2 networks
CAN system data networks, receive coal-winning machine control command, in addition while connection DSPIC the first nucleus modules of single-chip microcomputer, DSPIC
The nucleus module of single-chip microcomputer first delivers to the OFDM modulation that the nucleus modules of FPGA second carry out baseband signal after handling data well,
Frequency range is 250KHZ-450KHZ, then is sent by power carrier high pressure termination power module to power cable；On the other hand believe
Number modulate circuit selecting module selection ADC2 signal conditioning circuits module receives coal-winning machine prison of the frequency range between 3KHZ-150KHZ
The sensing data of control system, and be transferred to the nucleus modules of FPGA second and be demodulated, pass through the core of DSPIC single-chip microcomputers first afterwards
Core module carries out secondary unpacking processing and is sent to crossheading Surveillance center CAN networks by CAN1 networks；
The power carrier high pressure termination power module is combined coupling using phase-phase, " electromagnetic coupled " with " capacitance-resistance is pouring-in to be coupled "
The mode of conjunction, can be mounted to when being work on power cable on arbitrary corresponding two-phase can be led to
Letter, i.e. A-A and B-B or A-A and C-C or B-B and C-C；
Described double DAC signal conditioning circuits modules, including DAC process circuits, active low-pass filter circuit, the list being linked in sequence
End signal turns differential signal circuit and power amplification circuit, and wherein single-ended signal is turned differential signal circuit and entered using radio-frequency transformer
Row conversion, power amplification circuit is powered using DC+24V；
Described double ADC signal conditioning circuit modules, including be linked in sequence low-noise amplification circuit, active bandpass filiter circuit,
Differential signal turns single-ended signal circuit, AGC automatic gain control circuits and ADC process circuits；
Also include the double RS485 buses parallel with dual CAN bus；
Whole system is placed within explosion-proof cabinet, and explosion-proof cabinet is divided into left high-pressure area, right low voltage control region and middle interval
From region；Left high-pressure area is mounted to appointing in AC-1140V or AC-3300V coal-winning machine three-phase three-wire system power cable
On meaning correspondence two-phase, i.e. A-A and B-B or A-A and C-C or B-B and C-C, the right external DC+ in low voltage control region
24V dc sources as low voltage control area power supply.
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| CN201196088Y (en) * | 2008-05-15 | 2009-02-18 | 中国海洋石油总公司 | High-speed data transmission apparatus used for petroleum logging |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201196088Y (en) * | 2008-05-15 | 2009-02-18 | 中国海洋石油总公司 | High-speed data transmission apparatus used for petroleum logging |
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