CN104410451A - Broadband optical fiber transmission method and device in dual-end high-temperature environment - Google Patents
Broadband optical fiber transmission method and device in dual-end high-temperature environment Download PDFInfo
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- CN104410451A CN104410451A CN201410561840.5A CN201410561840A CN104410451A CN 104410451 A CN104410451 A CN 104410451A CN 201410561840 A CN201410561840 A CN 201410561840A CN 104410451 A CN104410451 A CN 104410451A
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Abstract
The invention discloses a broadband optical fiber transmission method and device in a dual-end high-temperature environment. The device mainly comprises a first high-temperature optical receiving and transmitting module, a second high-temperature optical receiving and transmitting module and a multimode optical fiber link to realize full-duplex communication. In a down link, a control command and the like arrive at a lower computer or a remote terminal through a transmitting portion of the first high-temperature optical receiving and transmitting module, a downlink multimode optical fiber and a receiving portion of the second high-temperature optical receiving and transmitting module; and in an up link, videos, audios and environment parameters acquired on site arrive at an upper computer or a monitoring host through a transmitting portion of the second high-temperature optical receiving and transmitting module, an uplink multimode optical fiber and a receiving portion of the first high-temperature optical receiving and transmitting module. Through adoption of the method and the device, a transmission function of thousands of meters and hundreds of Kbit/s can be provided for the dual-end high-temperature environment of not lower than 125 DEG C for a long time (without extra high-preserving means or device). Moreover, the device is compact in structure, and high in electromagnetic interference resistance. The method and the device have important significance to on-site supervision in a high-temperature extreme environment (such as oil field logging).
Description
Technical field
The present invention relates to the technical fields such as Fibre Optical Communication Technology, photoelectron element, full-duplex communication, oil reservoir logging.
Background technology
At various general, private communication and sensory field, optical fiber perception and transmission various information is utilized more and more to cause the attention of people.Because optical fiber has many advantages than with conventional coaxial cable and microwave transmission: first, the low decay of optical fiber and broad band performance, allow long range propagation and large transmission capacity; Secondly, optical fiber, as dielectric transmission medium, is insulation on electric between optical sender and optical receiver, and by the interference from strong-electromagnetic field and All other routes, thus can not improve signal transmission quality.
Optical fiber communication very high speed in normal conditions (several Gbit/s, tens Gbit/s, even more than Tbit/s can be reached), but working temperature is limited, cannot work in high temperature environments; And broadband connections demand under hot environment is very large, such as oil well logging, geological drilling, aircraft engine control system etc. all need to communicate in high temperature environments.Oil well logging is typically applied as one has representativeness, it is one of link of most fundamental sum most critical in petroleum industry, by the Real-Time Monitoring to important physical parameters such as downhole video, audio frequency, environmental parameters, timely acquisition down-hole information, has great significance to optimization oil recovery scheme, raising oilfield exploitation efficiency etc.
With regard to current technology, carry out transfer of data or communication in high temperature environments, or apart from short (not reaching several km or km), or transmission rate low (being difficult to more than 100Kbit/s).Traditional communication mode comprises wire communication and radio communication.In wire communication, cable transmission is commonplace transmission means: in high temperature environments, its message transmission rate can reach 100Kbit/s, but signal attenuation is at more than 70dB after transmitting through thousands of meters under non-relay condition, be difficult to be detected and recover at receiving terminal, its volume is large simultaneously, is not suitable for using in the scene of the space such as oil reservoir logging, geological prospecting very critical.And in wireless transmissions, conventional Wi-Fi wireless communication technology, the Technology of Ultra, Bluetooth technology etc. can reach the message transmission rate of Mbit/s easily, but transceiver module or terminal work at normal temperatures substantially (lower than 85 degrees Celsius), are unwell to long term high temperature broadband connections.In addition, mud-pulse transmission means, sonic transmissions mode, low-frequency electromagnetic wave transmission means conventional in oil reservoir logging, their transmission rate (from a few bit/s to hundreds of Kbit/s) on the low side, and latter two mode is also subject to environment, electromagnetic interference, transmission range very critical.
Summary of the invention
Task of the present invention is the deficiency overcoming above-mentioned existing program, the solution route of long-time high-temperature working performance, broadband data transmission, long range propagation can be provided simultaneously, with high temperature optical transceiver module, multimode fiber link, be not less than under 125 celsius temperatures, realizing the long-range full duplex broadband connections of hundred Kbit/s magnitudes, thousands of meters of transmission ranges.
Wideband optical fiber transmission device under a kind of hot environment, is made up of host computer or monitoring host computer 100, first high temperature optical transceiver module 200, descending multimode fiber link 301, upstream multimode optical fiber link 302, second high temperature optical transceiver module 400 and slave computer or remote terminal 500; Described first high temperature optical transceiver module and the second high temperature optical transceiver module have radiating portion and the receiving unit of same configuration, described radiating portion launches drive circuit by light and high temperature LED forms, described receiving unit is made up of photosignal pre-amplification circuit and main amplifying circuit and high temperature photodiode, is connected between the first high temperature optical transceiver module and the second high temperature optical transceiver module by two isometric multimode fibers reaching thousands of meters.
Described first high temperature optical transceiver module is connected by described multimode fiber symmetry with described second high temperature optical transceiver module.
The other end of described first high temperature optical transceiver module is connected with host computer or monitoring host computer, and the other end of described second high temperature optical transceiver module is connected with slave computer or remote terminal.
Described first high temperature optical transceiver module, the second high temperature optical transceiver module and multimode fiber can long-term work be not less than under the hot environment of 125 degrees Celsius, without the need to extra Insulation or device (be such as placed in by transceiver module in vacuum flask or constant temperature bottle etc.).Meanwhile, transmission range reaches thousands of rice, and serial data transmission speed reaches hundred Kbit/s.
A kind of wideband optical fiber transmission method under hot environment, it is characterized in that, in the downlink, the transmitting portion of host computer or monitoring host computer sending controling instruction signal to the first high temperature optical transceiver module, convert light signal to through downlink optical fiber link transmission to the receiving unit of the second high temperature optical transceiver module of slave computer or remote terminal, then recover described control command; In the uplink, the live video collected, audio frequency, ambient parameter data are sent to the transmitting portion of the second high temperature optical transceiver module by slave computer or remote terminal, convert light signal to through uplink optical fibers link transmission to the receiving unit of the first high temperature optical transceiver module of host computer, then recover three kinds of data such as described video, audio frequency, environmental parameter.
The present invention has following Advantageous Effects:
High temperature photoelectric component in this method and device all can be operated in the environment being not less than 125 degrees Celsius, the resistance to temperature value of high temperature optical module circuit board is especially up to 280 degrees Celsius, breach working temperature restriction (lower than 85 degrees Celsius) of conventional wire/wireless communication system, realize distance and reach thousands of rice (km) wideband transmit; The transmission rate of whole system can reach hundred Kbit/s simultaneously, be applicable to broadband serial data communication requirement and application under hot environment, need, in the Industry Control of high reliability, real-time, there is important using value by high temperature extreme environment (such as oil field development) etc.
Accompanying drawing illustrates:
Fig. 1. the inventive method and apparatus system application block diagram.
Fig. 2. the first high temperature optical transceiver module (a) and the second high temperature optical transceiver module (b) structural representation.
Fig. 3. the receiving unit amplification principle schematic diagram of high temperature optical transceiver module.(note: C1 ~ C9 represents electric capacity, R1 ~ R5 represents resistance, and 403 represent high temperature photodiode, and 404,405 represent amplifier, I
dthe photoelectric current exported after representing high temperature photodiode 203 or 403 receiving optical signals, OUT represents the final output of main amplifying circuit 205 or 405 after secondary amplifies)
Embodiment
Below in conjunction with accompanying drawing, enforcement of the present invention is further described.
As shown in Figure 1, the present invention is formed primarily of host computer or monitoring host computer 100, first high temperature optical transceiver module 200, descending multimode fiber link 301, upstream multimode optical fiber link 302, second high temperature optical transceiver module 400 and slave computer or remote terminal 500, is described in detail to high temperature optical transceiver module 200,400 and optical fiber link 301,302 below in conjunction with device principle and type selecting:
1. optical fiber link
Consider that the light source works wavelength of the transmitting portion of high temperature optical transceiver module is all near 850nm, so select multimode fiber to the design of optical fiber link 301 and 302, optical fiber long number km (km), loss is 3.5dB/km.The high temperature photodiode selected can detect the faint optical signal obtained after thousands of rice (km) transmission, and carry out effective opto-electronic conversion, the combination of pre-amplification circuit 404 and main amplifying circuit 405, to reach the level signal value that host computer or monitoring host computer 100 and slave computer or remote terminal 500 receiving port can identify.
2. high temperature optical transceiver module
Due to the work of high temperature optoelectronic transceiver module in high temperature environments, higher to photoelectric cell temperature requirement, thus select high temperature photoelectric receive and dispatch components and parts; Light source adopts high temperature LED 202 or 402, resistance to temperature value reaches 150 degrees Celsius, after encapsulation coupling, luminous power is 3 μ w, though this transmitting optical power is little, but the corresponding photodiode received adopts highly sensitive high temperature photodiode 203 or 403 (higher than-32dBm), and resistance to temperature value can reach 150 degrees Celsius, effectively can detect light signal (400 ~ 500nw faint after thousands of meters of transmission, nanowatt), and can effective opto-electronic conversion be carried out.
For work amplifier in high temperature environments, not only require that power consumption is little, and noise is also enough low, this invention utilizes the field-effect transistor prefix operation amplifying circuit 404 of low-power, low noise, low drifting, photoelectric current is changed into voltage signal, and main amplifying circuit 405 has selected the amplifier with ultralow bias characteristic further to amplify voltage, so that recover the original signal of telecommunication, simultaneously, also have matched supply source voltage conversion chip, ensure amplifying circuit normal work at high temperature.
The small-signal being hundreds of nanowatt (nw) for luminous power receives, and employs the receiving unit photoelectric detective circuit of high temperature optical transceiver module as shown in Figure 3.Here, the PIN type high temperature photodiode 403 that we select junction capacitance, dark current lower, and select dark current little, the good zero offset photovoltage pattern of the linearity is as pre-amplification circuit form.Pre-amplification circuit 404 have employed across resistance connected mode, cross-over connection feedback resistance, for choosing of feedback resistance R1, unsuitable excessive, otherwise circuit stability can be caused to be deteriorated, Measuring Time is elongated, the feedback capacity C9 that this circuit is also in parallel, is used for suppressing, smooth noise interference, and adopt the current-voltage converter amplifier circuit of T-shaped negative feedback resistor network, reduce to switch stabilization time, ensure measuring and amplifying multiple, reach higher accuracy of measurement.Because pre-amplification circuit output voltage is in millivolt (mv) magnitude, so need to carry out secondary amplification, therefore also needs main amplifying circuit, tens times even Enlargement Design of hundreds of times are carried out to enlarge leadingly output voltage.Meanwhile, we adopt high Tg to print PCB, and meet the long-term work of high temperature optical transceiver module at the normal requirements of one's work of high temperature extreme environment circuit board energy, the resistance to temperature value of circuit board can reach 280 degrees Celsius, ensure that feasibility of the present invention.
3. full-duplex communication
In conjunction with optical transceiver module, optical fiber link, broadband full-duplex communication under enforcement hot environment.Here, first, second high temperature optical transceiver module, multimode fiber are all placed in (slave computer or remote terminal, host computer or monitoring host computer) in hot environment, provide long-range, the transmission of broadband communications function under both-end hot environment.
In down link, the transmitting portion 206 of host computer or monitoring host computer 100 sending controling instruction signal to the first high temperature optical transceiver module, light signal is converted the electrical signal to through drive circuit 201 and high temperature LED 202, the receiving unit 407 of the second high temperature optical transceiver module is transferred to, the photoelectric current I exported after high temperature photodiode 403 receiving optical signals by descending multimode fiber link 301
d, and then obtain final output voltage signal V
oUT:
Wherein, R
1~ R
5represent the resistance value of resistance R1 ~ R5 in Fig. 3 respectively; Then this voltage signal is transferred to the receiving port of slave computer or remote terminal 500, completes the transmission of instruction.
In up link, the live video that slave computer or remote terminal 500 will collect, audio frequency, ambient parameter data is sent to the transmitting portion 406 of the second high temperature optical transceiver module, light signal is converted the electrical signal to through drive circuit 401 and high temperature LED 402, the receiving unit 207 of the first high temperature optical transceiver module is transferred to by uplink optical fibers link 302, the photoelectric current exported after high temperature photodiode 203 receiving optical signals, same basis (1) formula obtains final output voltage signal, what then this voltage signal is transferred to host computer or monitoring host computer 100 accepts port, complete video, audio frequency, the transmission of ambient parameter data.
In sum, the inventive method and device (two high temperature optoelectronic transceiver modules and optical fiber link) can long-term work in the both-end hot environment being not less than 125 degrees Celsius, transmission range is provided to reach thousands of rice (km), uplink downlink serial data transmission speed reaches the transfer function of hundred Kbit/s, achieves high temperature, long distance, broadband connections.
Above stated be only the preferred embodiment of the present invention; should be understood that; under the prerequisite not departing from the inventive method and core apparatus essence, can make within some changes (equivalent or distortion) also should be included in protection scope of the present invention in reality is implemented.
Claims (3)
1. a wideband optical fiber transmission device under both-end hot environment, is characterized in that: be made up of host computer or monitoring host computer 100, first high temperature optical transceiver module 200, descending multimode fiber link 301, upstream multimode optical fiber link 302, second high temperature optical transceiver module 400 and slave computer or remote terminal 500; Described device adopts symmetric pattern, and wherein the first high temperature optical transceiver module and the second high temperature optoelectronic transceiver module have radiating portion and the receiving unit of same configuration; Described radiating portion is launched drive circuit and high temperature LED by light and is formed, and described receiving unit is made up of photosignal pre-amplification circuit and main amplifying circuit and high temperature photodiode; The first end of described first high temperature optical transceiver module is connected by multimode fiber symmetry with the first end of described second high temperature optical transceiver module, second end of described first high temperature optical transceiver module is connected with host computer or monitoring host computer, and the second end of described second high temperature optical transceiver module is connected with slave computer or remote terminal.
2. wideband optical fiber transmission device under a kind of both-end hot environment according to claim 1, it is characterized in that: described first and second high temperature optical transceiver modules and multimode fiber can long-term work be not less than under the hot environment of 125 degrees Celsius, can provide the communication function of km transmission range, hundred Kbit/s data rates for the both-end hot environment being not less than 125 degrees Celsius.
3. wideband optical fiber transmission method under a both-end hot environment, it is characterized in that: in the downlink, the transmitting portion of host computer or monitoring host computer sending controling instruction signal to the first high temperature optical transceiver module, convert light signal transfers to the second high temperature optical transceiver module of slave computer or remote terminal receiving unit through multimode fiber to, then recover described control command; In the uplink, the live video collected, audio frequency, ambient parameter data are sent to the transmitting portion of the second high temperature optical transceiver module by slave computer, convert light signal transfers to the first high temperature optical transceiver module of host computer receiving unit through another multimode fiber to, then recover described video, audio frequency, ambient parameter data.
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| CN201410561840.5A CN104410451A (en) | 2014-10-20 | 2014-10-20 | Broadband optical fiber transmission method and device in dual-end high-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995433A (en) * | 2019-03-08 | 2019-07-09 | 北京航空航天大学 | A kind of fibre optic data transmission device for oil well logging equipment |
| CN113395112A (en) * | 2020-03-13 | 2021-09-14 | 通用电气公司 | System and method for optical data communication using wide bandgap semiconductor detectors |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102236A1 (en) * | 2006-03-09 | 2007-09-13 | Matsushita Electric Industrial Co., Ltd. | Optical transmission circuit |
| 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 |
-
2014
- 2014-10-20 CN CN201410561840.5A patent/CN104410451A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102236A1 (en) * | 2006-03-09 | 2007-09-13 | Matsushita Electric Industrial Co., Ltd. | Optical transmission circuit |
| 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 |
|---|
| 张宝林等: ""高温环境下油田测井信息光纤传输方案的设计"", 《光通信研究》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995433A (en) * | 2019-03-08 | 2019-07-09 | 北京航空航天大学 | A kind of fibre optic data transmission device for oil well logging equipment |
| CN113395112A (en) * | 2020-03-13 | 2021-09-14 | 通用电气公司 | System and method for optical data communication using wide bandgap semiconductor detectors |
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Application publication date: 20150311 |