CN104320193B - A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment - Google Patents
A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment Download PDFInfo
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- CN104320193B CN104320193B CN201410561837.3A CN201410561837A CN104320193B CN 104320193 B CN104320193 B CN 104320193B CN 201410561837 A CN201410561837 A CN 201410561837A CN 104320193 B CN104320193 B CN 104320193B
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- transceiver module
- optical transceiver
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Abstract
The invention discloses a kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment, mainly includes normal temperature optical transceiver module, high temperature optical transceiver module, multimode fiber link, realizes full-duplex communication.In downlink, the transmitting portion of the Jing normal temperature optical transceiver modules such as control instruction, descending multimode fibre, the receiving portion of high temperature optical transceiver module reach slave computer or remote terminal；In up-link, the video of collection in worksite, audio frequency, the transmitting portion of ambient parameter Jing high temperature optical transceiver module, upstream multimode optical fiber, the receiving portion of normal temperature optical transceiver module reach host computer or control main frame.The method and device (can be not less than 125 degrees Celsius for single-ended hot environment for a long time, without the need for extra Insulation or device) the full duplex transmission function of thousands of rice, Mbit/s is provided, and compact conformation, strong electromagnetism interference, it is significant for high temperature extreme environment (such as oil reservoir logging etc.) on-site supervision.
Description
Technical field
The present invention relates to the technical field such as Fibre Optical Communication Technology, photoelectron element, full-duplex communication, oil reservoir logging.
Background technology
In various general, private communications and sensory field, various information is perceived and is transmitted using optical fiber and increasingly causes people
Attention.Because optical fiber is than having many advantages with conventional coaxial cable and microwave transmission：First, the low decay of optical fiber and
Broad band performance, it is allowed to long range propagation and big transmission capacity；Secondly, optical fiber is used as dielectric transmission medium, optical sender and light
It is electrically insulation between receiver, and can not be by being disturbed from strong-electromagnetic field and All other routes, so as to improve
Signal transmission quality.
In normal conditions fiber optic communication very high speed (up to number Gbit/s, tens Gbit/s, even more than Tbit/s),
But operating temperature is limited, it is impossible to which work is in high temperature environments；And the broadband connections demand under hot environment is very big, for example oil is surveyed
Well, geological drilling, aircraft engine control system etc. are required for being communicated in high temperature environments, and oil well logging is used as a kind of allusion quotation
The great representativeness of application of type, it is one of link of most basic and most critical in petroleum industry, by downhole video, sound
Frequently, the real-time monitoring of the important physical parameter such as ambient parameter, obtains down-hole information in time, to optimizing oil recovery scheme, improving oil field
Production efficiency etc. has great significance.
For current technology, carry out data transmission in high temperature environments or communicate, or (several km are not reached apart from short
Or km), or transfer rate low (it is difficult to more than 100Kbit/s).Traditional communication mode includes wire communication and channel radio
Letter.In wire communication, cable transmission is commonplace transmission means：In high temperature environments, its message transmission rate can reach
100Kbit/s, but under conditions of non-relay Jing after thousands of meters of transmission signal attenuation in more than 70dB, in receiving terminal it is difficult to quilt
Detection and recovery, while its volume is big, are not suitable for used in the strictly limited scene in the spaces such as oil reservoir logging, geological prospecting.
And in wireless transmissions, conventional Wi-Fi wireless communication technologys, the Technology of Ultra, Bluetooth technology etc. can be easily
The message transmission rate of Mbit/s is reached, but transceiver module or terminal substantially work (less than 85 degrees Celsius) at normal temperatures, no
It is suitable for long term high temperature broadband connections, additionally, the mud-pulse transmission means commonly used in oil reservoir logging, sonic transmissions mode, low
Frequency electromagnetic waves transmission means, their transfer rate low (from several bit/s to hundreds of Kbit/s), and also latter two mode is also easy
By environment, electromagnetic interference, transmission range is strictly limited.
The content of the invention
The task of the present invention is to overcome the shortcomings of above-mentioned existing program, can provide long-time hot operation simultaneously
Energy, broadband data transmission, the solution route of long range propagation, with normal temperature optical transceiver module, high temperature optical transceiver module, optical fiber chain
Road, in the case where 125 celsius temperatures are not less than, realizes the long-range full duplex broadband connections of Mbit/s magnitudes, thousands of meters of transmission ranges.
A kind of asymmetric wideband optical fiber transmission device for single-ended hot environment, mainly by host computer or monitoring host computer
100th, normal temperature optical transceiver module 200, descending multimode fiber link 301, upstream multimode optical fiber link 302, high temperature optical transceiver module
400 and slave computer or remote terminal constitute.The normal temperature optical transceiver module and high temperature optical transceiver module are by emitting portion and connect
Receiving portions are constituted, and the normal temperature optical transceiver module emitting portion is made up of light emission driving circuit and normal temperature light emitting diode, is connect
Receiving portions are made up of photosignal pre-amplification circuit and main amplifying circuit and normal temperature photodiode；The high temperature light transmitting-receiving
Module emitting portion is made up of light emission driving circuit and high temperature LED, and receiving portion amplifies electricity by photosignal is preposition
Road and main amplifying circuit and high temperature photodiode are constituted, by two between normal temperature optical transceiver module and high temperature optical transceiver module
Isometric is connected up to thousands of meters of multimode fibre.
The normal temperature optical transceiver module and the high temperature optical transceiver module are symmetrically connected by the multimode fibre.
The other end of the normal temperature optical transceiver module is connected with host computer or monitoring host computer, and the high temperature light receives and dispatches mould
The other end of block is connected with slave computer or remote terminal.
The high temperature optical transceiver module and multimode fibre can long-term work in the hot environment for being not less than 125 degrees Celsius
Under, even more up to 280 degrees Celsius of the resistance to temperature value of high temperature optical module circuit board (will be such as received without the need for extra Insulation or device
Send out module to be placed in vacuum flask or constant temperature bottle etc.).Meanwhile, transmission range reaches thousands of rice, and serial data transmission speed reaches
Mbit/s。
A kind of asymmetric wideband optical fiber transmission method for single-ended hot environment, it is characterised in that in downlink
In, the transmitting portion of host computer or monitoring host computer transmission control instruction signal to normal temperature optical transceiver module is converted into optical signal Jing
Multimode fiber link transmits the receiving portion of the high temperature optical transceiver module to slave computer or remote terminal, then recovers described
Control instruction；In the uplink, the live video for collecting, audio frequency, ambient parameter data are sent to high temperature light by slave computer
The transmitting portion of transceiver module, is converted into optical signal Jing multimode fiber links and transmits connecing for the normal temperature optical transceiver module to host computer
Receiving portions, then recover described video, audio frequency, ambient parameter data.
The present invention has following Advantageous Effects：
High temperature photoelectric component in this method and device can be operated in and be not less than in 125 degrees Celsius of environment, break through
The operating temperature of conventional wire/wireless communication system limits (about 85 degrees Celsius), realizes that distance is wide up to thousands of rice (km)
Band transmission；The transfer rate of whole system is up to Mbit/s simultaneously, it is adaptable to broadband serial data communication requirement under hot environment
With application, will have in the Industry Control that high temperature extreme environment (such as oil field development) etc. needs high reliability, real-time
Important using value.
Description of the drawings：
Fig. 1. the inventive method and apparatus system application principle block diagram.
Fig. 2. asymmetric normal temperature optical transceiver module structure (a) and secondary amplifying circuit (b) schematic diagram.(note：C1～C4 tables
Show electric capacity, R1～R2 represents resistance, and 204 represent amplifier, ViRepresent what normal temperature photodiode 203 was exported after receiving optical signal
Voltage, OUT1 represent the final output end by secondary amplifying circuit 204)
Fig. 3. asymmetric high temperature optical transceiver module structural representation.
Fig. 4. two grades of enlarged diagrams of receiving portion of asymmetric high temperature optical transceiver module.
(note：C5～C13 represents electric capacity, and R3～R7 represents resistance, and 403 represent photodiode, and 404,405 represent amplification
Device, IDThe photoelectric current that high temperature photodiode 403 is exported after receiving optical signal is represented, OUT2 represents the main amplification Jing after two grades are amplified
The final output end of circuit 405)
Specific embodiment
Enforcement to the present invention below in conjunction with the accompanying drawings is further described.
As shown in figure 1, the present invention is mainly by host computer or monitoring host computer 100, normal temperature optical transceiver module 200, descending multimode
Optical fiber link 301, upstream multimode optical fiber link 302, high temperature optical transceiver module 400 and slave computer or remote terminal are constituted, under
Face combines device principle with type selecting to normal temperature optical transceiver module 200, multimode fiber link 301,302 and high temperature optical transceiver module
400 are described in detail：
1. normal temperature optical transceiver module
For the light source of normal temperature optical transceiver module transmitting portion, we are from industrial level led, its application
Mainly include host monitor, Industry Control link etc., resistance to temperature value in -40～85 degrees Celsius, and data rate up to DC～
5Mbit/s scopes, meet the needs of the present invention.
As general logic gates can not directly drive light emitting diode, so here with being input into four tunnels two
Main devices of the chip 201 of NAND gate as drive circuit.Because the maximum sink current of simple gate logical drive is limited, therefore sharp
Drive light emitting diode to be operated simultaneously with three tunnel NAND gates parallel connections, and 74 family chips are have selected as preferably driving
Device.As 74 series are that resistance to temperature value is different with 54 family chips, therefore 74 series are selected as the transmission of normal temperature optical transceiver module
Partial driving chip, and 54 series then as high temperature optical transceiver module transmitting portion driving chip.
For normal temperature photodiode, we from response wave length scope 300～1100nm big bandwidth (DC～
10MHz), reception of the normal temperature photodiode 203 of high sensitivity (being better than -35dBm) as our normal temperature optical transceiver module
Partial main devices, due to its output voltage it is less, so we devise secondary amplifying circuit as shown in Figure 2 204 pairs
Its weak voltage carries out secondary amplification.
The secondary amplifying circuit 204 of normal temperature optical transceiver module receiving portion selects the amplifier with larger gain bandwidth product
Chip, the selected normal temperature photodiode 203 of normal temperature optical transceiver module have the wide advantage of high sensitivity, Hz-KHz, and
And temperature requirement is not high to external world, but limited by the next 402 characteristic of generator terminal high temperature light emitting diode, along with thousands of rice
(km) there is larger distortion in multimode fibre transmission, data transfer.Because 203 output voltage of normal temperature photodiode only has tens
Millivolt (mv) magnitude, also needs to put and several ten times larger reaches TTL identification level；So big bandwidth, voltage feedback type amplifier are have selected,
Amplifier gain bandwidth product is 500MHz, and switching rate is 1800V/ μ s, with the secondary amplifying circuit of homophase 204 so as to export
Voltage meets Transistor-Transistor Logic level, realizes MHz broadband connections, and then implements the transmission of the Large Volume Datas such as sound, video.
2. optical fiber link
In view of normal temperature, the transmitting portion of high temperature optical transceiver module light source works wavelength near 850nm, so right
The design of optical fiber link 301,302 selects multimode fibre, a length of thousands of rice (km) of optical fiber to be lost as 3.5dB/km.What is selected is normal
Temperature, high temperature photodiode can detect the faint optical signal obtained after thousands of rice (km) are transmitted, and carry out effectively
Opto-electronic conversion, coordinates secondary amplifying circuit 204, and the combination of pre-amplification circuit 404 and main amplifying circuit 405 is upper to reach
The level signal value that machine or monitoring host computer 100 and slave computer or 500 receiving port of remote terminal can be recognized.
3. high temperature optical transceiver module
It is as high temperature optical transceiver module works in high temperature environments, higher to optical element temperature requirement, so from resistance to
High temperature optoelectronic transceiver components and parts；Light source adopts high temperature LED 402, and resistance to temperature value is sent out after encapsulated coupling up to 150 degrees Celsius
Luminous power is 3 μ w, though this transmitting optical power is little, the photodiode that correspondence is received adopts highly sensitive high temperature photodiode
403 (being higher than -32dBm), resistance to temperature value, being capable of the faint optical signals after thousands of meters of transmission of effective detection up to 150 degrees Celsius
(400～500nw, nanowatt), and effective opto-electronic conversion can be carried out.
For work amplifier in high temperature environments, small power consumption is not required nothing more than, and noise is also sufficiently low, the invention
Using low-power, low noise, low drifting field-effect transistor prefix operation amplifying circuit 404, photoelectric current is changed into into voltage
Signal, and main amplifying circuit 405 has selected the amplifier with ultralow bias characteristic further to amplify voltage, so that
Recover original electric signal.Meanwhile, also have matched supply source voltage conversion chip, it is ensured that amplifier normal work at high temperature
Make.
Receive for small-signal of the luminous power for hundreds of nanowatt (nw), used high temperature optoelectronic transceiver mould as shown in Figure 4
The receiving portion photoelectric detective circuit of block.Here, we select relatively low two pole of PIN-type high temperature photoelectricity of junction capacity, dark current
Pipe 403, and select dark current little, the good zero offset photoelectricity die pressing type of the linearity is used as pre-amplification circuit form.Preposition amplification
Circuit 404 is employed across resistance connected mode, has bridged a feedback resistance R1；It is for the selection of feedback resistance R1, unsuitable excessive,
Circuit stability can be otherwise caused to be deteriorated, time of measuring is elongated, circuit feedback capacity C9 also in parallel, for suppressing, putting down
Sliding noise jamming, and using the current-voltage converter amplifier circuit of T-shaped negative feedback resistor network, reduce switching stabilization time,
Ensure measuring and amplifying multiple, reach higher accuracy of measurement.As pre-amplification circuit output voltage is in millivolt (mv) magnitude,
So needing to carry out two grades of amplifications, therefore main amplifying circuit is also needed, tens times of even hundreds of times are carried out to preposition amplification output voltage
Enlargement Design.Meanwhile, we print PCB using high Tg, meet high temperature optical transceiver module long-term work in high temperature
The needs of extreme environment circuit board energy normal work, the resistance to temperature value of circuit board is up to 280 degrees Celsius, it is ensured that the present invention's is feasible
Property.
4. full-duplex communication
With reference to optical transceiver module, optical fiber link, implement broadband full-duplex communication under hot environment.Here, high temperature light transmitting-receiving
Module, multimode fibre are placed in hot environment (typically slave computer or remote terminal), normal temperature optical transceiver module and are placed in often
In warm environment, there is provided long-range, the transmission of broadband communications function under single-ended hot environment.
In up-link, the live video for collecting, audio frequency, ambient parameter data are sent out by slave computer or remote terminal 500
The transmitting portion 406 of high temperature optical transceiver module is sent to, electric signal is changed by Jing drive circuits 401 and high temperature LED 402
Into optical signal, transmitted by upstream multimode optical fiber link 302 to the receiving portion 207 of normal temperature optical transceiver module, Jing normal temperature photoelectricity two
The voltage V that pole pipe 203 is exported after receiving optical signali, and then final output voltage signal is obtained by secondary amplifying circuit 204
VOUT1
Wherein, R1,R2The resistance value of resistance R1～R2 in Fig. 2 (b) is represented respectively.Then this voltage signal is transferred to
The transmission for receiving port, completing video, audio frequency, ambient parameter data of position machine or monitoring host computer 100.
In downlink, the transmission of host computer or the transmission control instruction signal to normal temperature optical transceiver module of monitoring host computer 100
Part 206, Jing drive circuits 201 and high temperature LED 202 convert the electrical signal to optical signal, by descending multimode fibre chain
Road 301 is transmitted to the receiving portion 407 of high temperature optical transceiver module, exports Jing after high temperature photodiode 403 receives optical signal
Photoelectric current ID, and then obtain final output voltage signal VOUT2
Wherein, R3～R7The resistance value of resistance R3～R7 in Fig. 4 is represented respectively.Then this voltage signal is transferred to into bottom
The receiving port of machine or remote terminal 500, completes the transmission of control instruction.
In sum, the inventive method and device can be long-term work in the single-ended high temperature ring for being not less than 125 degrees Celsius
Border, there is provided transmission range is up to thousands of rice, transfer function of the uplink downlink serial data rate up to Mbit/s is realized real
High temperature, long range, broadband connections.
Set forth above is only the preferred embodiment of the present invention, it is noted that without departing from the inventive method and
On the premise of core apparatus essence, some changes (equivalent deforms) can be made in actual enforcement and should also be included in the present invention
Protection domain within.
Claims (3)
1. a kind of asymmetric wideband optical fiber transmission device for single-ended hot environment, it is characterised in that：Mainly by host computer
Or monitoring host computer 100, normal temperature optical transceiver module 200, descending multimode fiber link 301, upstream multimode optical fiber link 302, high temperature
Optical transceiver module 400 and slave computer or remote terminal are constituted；Device adopts asymmetric mode, wherein normal temperature optical transceiver module by
Emitting portion and receiving portion composition, high temperature optical transceiver module are made up of emitting portion and receiving portion, the normal-temperature light transmitting-receiving
Module emitting portion is made up of light emission driving circuit and normal temperature light emitting diode, and receiving portion amplifies electricity by photosignal is preposition
Road and main amplifying circuit and normal temperature photodiode are constituted；The high temperature optical transceiver module emitting portion drives electricity by light transmitting
Road and high temperature LED composition, receiving portion is by photosignal pre-amplification circuit and main amplifying circuit and high temperature photoelectricity
Diode is constituted；The first end of the first end of the normal temperature optical transceiver module and the high temperature optical transceiver module is by the multimode
Optical fiber symmetrically connects, and the second end of the normal temperature optical transceiver module is connected with host computer or monitoring host computer, the high temperature light
Second end of transceiver module is connected with slave computer or remote terminal；
The normal temperature photodiode is excellent in the big bandwidth of DC ~ 10MHz of 300 ~ 1100nm, sensitivity from response wave length scope
In -35dBm normal temperature photodiode 203 as the receiving portion of normal temperature optical transceiver module main devices, and by having
The secondary amplifying circuit 204 of the amplifier chip of larger gain bandwidth product carries out the secondary amplification of homophase to its weak voltage so as to
Output voltage meets Transistor-Transistor Logic level, realizes MHz broadband connections；
The PIN type high temperature photodiode 403 of the photodiode that light source is received using high temperature LED 402, correspondence,
And using zero offset photoelectricity die pressing type as pre-amplification circuit form；Pre-amplification circuit 404 is employed across resistance connected mode,
Bridged a feedback resistance R1, in parallel feedback capacity C9 to suppress, smooth noise interference, and using T-shaped negative-feedback electricity
The current-voltage converter amplifier circuit of resistance network；Photoelectric current is changed into voltage signal by pre-amplification circuit 404, and main amplification
Circuit 405 is further amplified to voltage from the amplifier with ultralow bias characteristic.
2. a kind of asymmetric wideband optical fiber transmission device for single-ended hot environment according to claim 1, which is special
Levy and be：The high temperature optical transceiver module and multimode fibre can long-term work be not less than in the environment of 125 degrees Celsius, can
Single-ended hot environment to be not less than 125 degrees Celsius provides the communication function of thousands of meters of transmission ranges, Mbit/s data rates.
3. a kind of asymmetric wideband optical fiber transmission method in claim 1 or 2 devices for single-ended hot environment, which is special
Levy and be：Using the secondary amplifying circuit 204 of specific normal temperature optical transceiver module 200 and selected performance, pre-amplification circuit 404,
Main amplifying circuit 405 and its peripheral circuit are realizing normal work at high temperature；In the downlink, host computer or monitoring master
Machine send control instruction signal to normal temperature optical transceiver module transmitting portion, be converted into optical signal Jing multimode fiber links transmit to
The receiving portion of the high temperature optical transceiver module of slave computer or remote terminal, then recovers described control instruction；In uplink
The live video for collecting, audio frequency, ambient parameter data are sent to the sending part of high temperature optical transceiver module for Lu Zhong, slave computer
Point, the receiving portion that optical signal Jing multimode fiber links transmit the normal temperature optical transceiver module to host computer is converted into, is then recovered
Go out described video, audio frequency, ambient parameter data.
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| CN201410561837.3A CN104320193B (en) | 2014-10-20 | 2014-10-20 | A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment |
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| CN201410561837.3A CN104320193B (en) | 2014-10-20 | 2014-10-20 | A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment |
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| CN108337150A (en) * | 2017-12-29 | 2018-07-27 | 广州雅广信息科技有限公司 | A kind of more conferencing resource integrating instant communication systems of enterprise |
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| WO2007102236A1 (en) * | 2006-03-09 | 2007-09-13 | Matsushita Electric Industrial Co., Ltd. | Optical transmission circuit |
| CN102227543A (en) * | 2008-09-29 | 2011-10-26 | 普拉德研究及开发股份有限公司 | High-temperature downhole devices |
| CN203838375U (en) * | 2014-04-11 | 2014-09-17 | 广州智能科技发展有限公司 | Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system |
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2014
- 2014-10-20 CN CN201410561837.3A patent/CN104320193B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102236A1 (en) * | 2006-03-09 | 2007-09-13 | Matsushita Electric Industrial Co., Ltd. | Optical transmission circuit |
| CN102227543A (en) * | 2008-09-29 | 2011-10-26 | 普拉德研究及开发股份有限公司 | High-temperature downhole devices |
| CN203838375U (en) * | 2014-04-11 | 2014-09-17 | 广州智能科技发展有限公司 | Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system |
Non-Patent Citations (1)
| Title |
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| "高温环境下油田测井信息光纤传输方案的设计";张宝林等;《光通信研究》;20130111;14-16 * |
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