CN103308209A - Optical fiber point-mode temperature measuring system - Google Patents
Optical fiber point-mode temperature measuring system Download PDFInfo
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- CN103308209A CN103308209A CN2012100585321A CN201210058532A CN103308209A CN 103308209 A CN103308209 A CN 103308209A CN 2012100585321 A CN2012100585321 A CN 2012100585321A CN 201210058532 A CN201210058532 A CN 201210058532A CN 103308209 A CN103308209 A CN 103308209A
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Abstract
The invention discloses an optical fiber point-mode temperature measuring system comprising a collection end and a demodulation end, wherein the collection end is provided with a first filter, first, second and third spatial light paths and an optical fiber power-taking module, the demodulation end is provided with a second filter and fourth, fifth and sixth spatial light paths, and the collection end is connected with the demodulation end through an optical fiber jumper. The technical scheme of the invention has the following advantages: the size of a probe can be obviously reduced and the miniaturization of the probe can be realized as the collection end and the demodulation end are connected by the spatial light paths instead of real cables; a low-power processor and a low-power sensor are adopted in the collection end and the low-power processor and the low-power sensor work in an intermittent mode so that ultra-low power consumption can be achieved and the average power consumption is less than 0.1mW; and the system has strong anti-interference capability as the collection end transmits collected data to the demodulation end through the optical fiber jumper in the mode of pulse position modulation.
Description
Technical field
The present invention relates to the sensing and detecting system technical field that use in electric power apparatus integrated monitoring field, relate in particular to a kind of optical fiber point type temp measuring system.
Background technology
Traditional sensing transducer is that a kind of measured physics amount that will import is isolated and become the device that send to electric signal according to certain ratio.Its output can be directly and the input coupling of equipment such as system remote control device, recorder, forms data acquisition and monitoring system, is to guarantee the open the light vitals of power equipment safety such as cabinet, economy, stable operation of transformer, frequency converter unit, high pressure.
In actual applications, above-mentioned site environment is often extremely abominable, operating personnel often can't reach the spot and must gather these simulating signals at a distance, distance is to hundreds of rice even several kilometers, (discharge is disturbed as celestial body except the various interference owing to industry spot, the corona spark discharge disturbs, the electrical equipment frequency interferences, inductive disturbance) can enter measuring system by different coupling scheme makes outside the serious distortion of signal, owing to often exist several kilovolts between in-site measurement circuit ground and the rear end Acquisition Circuit ground wire to the common mode voltage of volts up to ten thousand, if directly link to each other with cable, can produce very big ground loop electric current, safety to equipment and operating personnel constitutes greatly threat, therefore must just can finish high-precision measurement under the state of isolating mutually.
Under such background, the Fibre Optical Sensor transmitter that has been born necessarily lies prostrate step voltage and communicated data signal betwixt even isolate with optical fiber between collection terminal and the equipment.Optical fiber is because the ability of its excellent electrical insulative property and good anti-electromagnetic interference (EMI), in electrical hazard environmental applications very attractive.Present existing Fibre Optical Sensor transmitter mainly is divided into two big classes: one utilizes the spectral characteristic metering system for the fiber grating class; Two is microcontroller class digital transmitter.
The fiber grating class utilizes the Fibre Optical Sensor transmitter of spectral characteristic metering system to have electrical isolation characteristic completely, there is not electric part at collection terminal, and be a kind of passive transmitter, but therefore fiber grating class sensing transducer has restricted its popularization and development owing to will use S-LED light source and grating with high costs.Consider cost, in the following high-tension switch cabinet of 35KV, transformer and high voltage converter, use fiber grating class sensing transducer can not be given birth to manufacturer to accept.
Microcontroller class digital transmitter is at the inner disposition built-in micro control system of high-tension apparatus, gathers simulating signal, it is passed back by optical fiber again, can realize the optical fiber isolation equally.But because need powering, embedded micro control system could normally move, these electric wirings for the micro control system power supply of collection terminal can bring a series of security challenge to product, and the excessive limitation of its volume also is to cause its not high reason of feasibility in high voltage electric power equip ment in addition.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of optical fiber point type temp measuring system, support the collection terminal operation by the optical fiber power taking, and the optical cable connected mode discards tradition, adopt the space optics structure, to overcome cost height in the prior art, the low defective of security, the reduction small product size also reduces power consumption.
In order to achieve the above object, the present invention adopts a kind of optical fiber point type temp measuring system, comprises collection terminal and demodulating end, and wherein said collection terminal comprises: the sensor of measuring physical quantity; The data message that sensor is measured and imports uses the processor of pulse-position modulation method coding; To be converted to the modulated laser of light signal from the electric signal of processor input, described demodulating end comprises the laser instrument that is subjected to external unit control emission laser; Demodulating data and with its input external unit the optical modulator module, it is characterized in that: described optical fiber point type temp measuring system also comprises: optical patchcord, its two ends connect collection terminal and demodulating end respectively; The optical fiber electricity-fetching module is positioned at collection terminal, and the one end connects processor, and the two ends of processor connect sensor and modulated laser respectively; Described optical fiber electricity-fetching module is processor, sensor and modulated laser power supply; First filter plate, be positioned at collection terminal, being the 3rd space optical path between described first filter plate and the optical patchcord, is second space optical path between described first filter plate and the optical fiber electricity-fetching module, is first space optical path between described first filter plate and the modulated laser; Second filter plate is positioned at demodulating end, is the 4th space optical path between described second filter plate and the optical patchcord, is the 5th space optical path between described second filter plate and the laser instrument, is the 6th space optical path between described second filter plate and the optical modulator module.
Described processor adopting low power processor, described sensor adopts the low-power consumption sensor, can realize super low-power consumption, and average power consumption is less than 0.1mW.
Adopt the technical solutions according to the invention advantage to be: between collection terminal and demodulating end two parts, to connect replacement entity optical cable with space optical path and connect, can obviously dwindle probe size, realize the probe miniaturization; Adopt low power processor and low-power consumption sensor in the collection terminal, with intermittent work mode, can realize super low-power consumption, average power consumption is less than 0.1mW; Collection terminal is passed the data that collect back demodulating end in the mode of pulse-position modulation in optical patchcord, make that system's antijamming capability is strong.
Description of drawings
Fig. 1 is structural representation of the present invention.
Concrete enforcement formula
Further specify concrete implementation step of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, collection terminal 1 of configuration in the environment that needs detect, configuration demodulating end 2 and external unit 3 in away from the place of test environment.
External unit 3 control laser instruments 12, making laser instrument 12 emission wavelengths is the laser of λ 2, described wavelength is that the laser of λ 2 is along the direction of the 5th space optical path 17 wave plate 10 after filtration successively, the 4th space optical path 16, optical patchcord 4, the 3rd space optical path 15 to first filter plates 5, first filter plate 5 is that the light of λ 2 is through second space optical path, 14 input optical fibre electricity-fetching modules 6 with wavelength, optical fiber electricity-fetching module 6 and processor 7, sensor 8 is connected with modulated laser 9, when wavelength is that the light of λ 2 just can be to processor 7 when putting aside to a certain degree in optical fiber electricity-fetching module 6, sensor 8 and modulated laser 9 power supplies, operate with drive system, sensor 8 beginning collecting temperature data and with data input processor 7, processor 7 is imported modulated laser 9 with the data message of sensor 8 inputs with the method coding back of pulse-position modulation, modulated laser 9 is launched into first space optical path 13 with light, again through first filter plate 5, the 3rd space optical path 15, optical patchcord 4, second filter plate 10 of the 4th space optical path 16 to the demodulating end.
In demodulating end 2, second filter plate 10 is that the light of λ 1 is separated from the 4th space optical path 16 with wavelength, input optical modulator module 11, and the temperature data input external unit 3 that demodulates uses for applications equipment.
Collection terminal 1 enters dormant state after each collection period finishes, to save electric energy.
According to different detection demands, sensor 8 can be selected the analog or digital sensor of temperature sensor, humidity sensor, current transformer etc., to form the different optical fiber point type temperature systems that detect effect.
Claims (4)
1. an optical fiber point type temp measuring system comprises collection terminal and demodulating end, and wherein said collection terminal comprises:
Measure the sensor of physical quantity; The data message that sensor is measured and imports uses the processor of pulse-position modulation method coding; To be converted to the modulated laser of light signal from the electric signal of processor input, described demodulating end comprises the laser instrument that is subjected to external unit control emission laser; Demodulating data and with its input external unit the optical modulator module, it is characterized in that:
Described optical fiber point type temp measuring system also comprises:
Optical patchcord, its two ends connect described collection terminal and described demodulating end with space optical path respectively;
The optical fiber electricity-fetching module is positioned at collection terminal, and the one end connects processor, and the two ends of processor connect sensor and modulated laser respectively; Described optical fiber electricity-fetching module is processor, sensor and modulated laser power supply;
First filter plate, be positioned at collection terminal, being the 3rd space optical path between described first filter plate and the optical patchcord, is second space optical path between described first filter plate and the optical fiber electricity-fetching module, is first space optical path between described first filter plate and the modulated laser;
Second filter plate is positioned at demodulating end, is the 4th space optical path between described second filter plate and the optical patchcord, is the 5th space optical path between described second filter plate and the laser instrument, is the 6th space optical path between described second filter plate and the optical modulator module.
2. a kind of optical fiber point type temp measuring system according to claim 1 is characterized in that: described collection terminal enters dormant state after each collection period finishes.
3. a kind of optical fiber point type temp measuring system according to claim 1, it is characterized in that: described sensor is temperature sensor, humidity sensor, current transformer.
4. a kind of optical fiber point type temp measuring system according to claim 1 is characterized in that: described processor adopting low power processor, described sensor employing low-power consumption sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100585321A CN103308209A (en) | 2012-03-06 | 2012-03-06 | Optical fiber point-mode temperature measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100585321A CN103308209A (en) | 2012-03-06 | 2012-03-06 | Optical fiber point-mode temperature measuring system |
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| CN103308209A true CN103308209A (en) | 2013-09-18 |
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| CN2012100585321A Pending CN103308209A (en) | 2012-03-06 | 2012-03-06 | Optical fiber point-mode temperature measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776563A (en) * | 2013-11-25 | 2014-05-07 | 上海华魏光纤传感技术有限公司 | Fiber point-mode temperature measuring system with wireless networking function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195322A (en) * | 1984-10-17 | 1986-05-14 | Nec Corp | Device for generating phase modulating light for optical communication |
| US6061134A (en) * | 1998-05-22 | 2000-05-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Modulated Fourier Transform Raman fiber-optic spectroscopy |
| CN1928599A (en) * | 2006-09-29 | 2007-03-14 | 天津爱天光电子科技有限公司 | Optical fiber grating sensor and portable electric devices temperature detection system therewith |
| CN201368778Y (en) * | 2008-12-22 | 2009-12-23 | 延安供电局 | Fiber grating electric power temperature monitoring system |
| CN202770553U (en) * | 2012-06-15 | 2013-03-06 | 上海华魏光纤传感技术有限公司 | Optical fiber point-mode temperature measuring system |
-
2012
- 2012-03-06 CN CN2012100585321A patent/CN103308209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195322A (en) * | 1984-10-17 | 1986-05-14 | Nec Corp | Device for generating phase modulating light for optical communication |
| US6061134A (en) * | 1998-05-22 | 2000-05-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Modulated Fourier Transform Raman fiber-optic spectroscopy |
| CN1928599A (en) * | 2006-09-29 | 2007-03-14 | 天津爱天光电子科技有限公司 | Optical fiber grating sensor and portable electric devices temperature detection system therewith |
| CN201368778Y (en) * | 2008-12-22 | 2009-12-23 | 延安供电局 | Fiber grating electric power temperature monitoring system |
| CN202770553U (en) * | 2012-06-15 | 2013-03-06 | 上海华魏光纤传感技术有限公司 | Optical fiber point-mode temperature measuring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776563A (en) * | 2013-11-25 | 2014-05-07 | 上海华魏光纤传感技术有限公司 | Fiber point-mode temperature measuring system with wireless networking function |
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Application publication date: 20130918 |