CN102798408A - Fiber Bragg grating sensing system using the multiplexer for multi-channel - Google Patents
Fiber Bragg grating sensing system using the multiplexer for multi-channel Download PDFInfo
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- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
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- G01D7/00—Indicating measured values
- G01D7/02—Indicating value of two or more variables simultaneously
- G01D7/08—Indicating value of two or more variables simultaneously using a common indicating element for two or more variables
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
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Abstract
The invention relates to a fiber bragg grating sensing system using the multiplexer for multi-channel. In particular, for the fiber bragg grating sensing system, multiple fiber bragg grating sensors are in star connection with secondary multi-channels, and a primary channel of the multiplexer is connected with an optical wave length measuring device, so the radiating light radiated by the optical wave length measuring device is transmitted to the multiple fiber bragg grating sensors via the multiplexer, and then the reflected light sensed and reflected by the multiple fiber bragg grating sensors are transmitted to the optical wave length measuring device via the multiplexer, and finally the optical wave length can be measured. The optical wave length is transmitted to a PC, and the PC can sense each of the fiber bragg grating sensors, so the precision is improved, and the error rate is reduced.
Description
Technical field
The present invention relates to a kind of Fiber Bragg Grating FBG (FBG) sensor-based system that utilizes multichannel with traffic pilot.Particularly; With the secondary multichannel (secondary multi-channel) of a plurality of fiber Bragg grating sensor Y-connections (star connection) to traffic pilot; And a secondary channel (primary channel) of traffic pilot is connected to the optical wavelength analyzer; Thereby make radiating light arrive fiber Bragg grating sensor through traffic pilot by the radiation of optical wavelength analyzer; At this moment, the reflected light that is reflected by the fiber Bragg grating sensor sensing is again through traffic pilot back light wavelength analyzer, thus the measuring light wavelength value.Though it is the value of which sensor that the optical wavelength analyzer can't be differentiated the light wave long value of measuring from each fiber Bragg grating sensor reflection; But can with above-mentioned light wave long value send to personal computer with at personal computer by each fiber Bragg grating sensor perception; Thereby that realizes that degree of accuracy is high, the mistake incidence is low utilizes Fiber Bragg Grating FBG (Fiber Bragg Grating, FBG) sensor based on the fiber Bragg grating sensor of multichannel with traffic pilot.
Background technology
Boats and ships comprise numerous cabin (tank).Especially crude oil or oil refining cargo ship comprise the crude oil tank (cargo tank) that is used for loading crude oil, be equipped with in order to keep the boats and ships balance water ballast tank (ballast water tank), be used for the various fuel compartment various cabins (tank) such as (fuel tank) of keeping at employed fuel oil such as leading engine that is used to start boats and ships and dynamo engines.
If will make the smooth shipping of boats and ships, the water level that needs in time to understand the liquid (crude oil, water, fuel etc.) of keeping in the boats and ships how.For this reason, can measure the sensor of the water level, temperature, pressure etc. of liquid in the boats and ships setting.Be delivered to the central control room of boats and ships and monitored by the value of sensor determination, if the value of being measured surpasses setting value, sound will give the alarm.
At present; Fiber Bragg grating sensor is used in many industrial fields widely; But characteristic from the optical wavelength analyzer; Be connected in series in a channel between the fiber Bragg grating sensor and use, the shortcoming that the fiber Bragg grating sensor after therefore having therein under the situation that fiber optic cables that break down or connect break off can not be measured.And the maximum quantity of the sensor that can connect also is limited to 10～20.
Based on above-mentioned shortcoming, however fiber Bragg grating sensor has on life-span or performance than electric sensor, the more superior advantage of mechanical pick-up device, but still can't be used in the sensor-based system that can monitor big quantity sensor.
Summary of the invention
The present invention provides a kind of fiber Bragg grating sensor that utilizes multichannel with traffic pilot.Utilization can realize independently being directed against the optical wavelength mensuration of individual fibers Bragg grating sensor with Y-connection (star conncction) mode but not with the traffic pilot (multiplexer) that series system couples together a plurality of sensors; And the light wave long value that will so measure sends to personal computer to carry out perception at personal computer by each sensor; Thereby the use Fiber Bragg Grating FBG that degree of accuracy is high, the mistake incidence is low is provided, and (Fiber Bragg Grating, FBG) sensor utilizes the fiber Bragg grating sensor of multichannel with traffic pilot.
As the technical scheme that addresses the above problem; The present invention provides a kind of fiber Bragg grating sensor that utilizes multichannel with traffic pilot; Comprise: the optical wavelength analyzer, radiate radiating light and accept reflected light, analyze above-mentioned radiating light and above-mentioned catoptrical spectrum is measured optical wavelength; And a plurality of fiber Bragg grating sensors; Accept above-mentioned radiating light and along with environmental variance produces reflected light with different refractive index; Above-mentioned fiber Bragg grating sensor is characterised in that; Comprise: traffic pilot, itself and above-mentioned a plurality of Fiber Bragg Grating FBG are distinguished Y-connection, and generate above-mentioned radiating light of transmission and above-mentioned catoptrical light path respectively accordingly successively with above-mentioned a plurality of fiber Bragg grating sensors; Measurement processing portion, above-mentioned environmental variance is measured and kept watch on to its optical wavelength that is based on above-mentioned optical wavelength analyzer mensuration; Above-mentioned a plurality of fiber Bragg grating sensor also comprises the reference optical fiber Bragg grating sensor, and this reference optical fiber Bragg grating sensor is used for the perception of guiding measuring handling part and measures the zero hour.
Fiber Bragg Grating FBG (the Fiber Bragg Grating that utilizes multichannel with traffic pilot of the present invention; FBG) sensor-based system has following effect: capable of using can be with Y-connection (star conncction) mode but not measure optical wavelength with the traffic pilot (mutiplexer) that series system connects a plurality of sensors; And the light wave long value that will so measure sends to personal computer carrying out perception at personal computer by each sensor, thereby improves the degree of accuracy of fiber Bragg grating sensor and eliminate wrong incidence fully.
Description of drawings
Fig. 1 is the structural drawing of the fiber Bragg grating sensor that utilizes fiber Bragg grating sensor of expression one embodiment of the invention.
Fig. 2 is the structural drawing of Fiber Bragg Grating FBG structure of the sensor of expression Fiber Bragg Grating FBG.
Fig. 3 is the structural drawing of the fiber Bragg grating sensor of expression another embodiment of the present invention.
Fig. 4 is the structural drawing of concrete expression fiber Bragg grating sensor as shown in Figure 3.
Fig. 5 is the sequential chart that is used to explain the action of switch control part.
Embodiment
Below, the present invention will be described in more detail through embodiment.These embodiment are only limited to illustration the present invention, and rights protection scope of the present invention is not restricted to these embodiment.
Fig. 1 is being connected in series of expression one embodiment of the invention and the structural drawing that utilizes the fiber Bragg grating sensor of fiber Bragg grating sensor.
As shown in Figure 1, fiber Bragg grating sensor comprises: a plurality of fiber Bragg grating sensors 1, along with environmental variance generates reflected light with different refractive indexes; Optical wavelength analyzer 2, it measures optical wavelength to the reflected light that a plurality of fiber Bragg grating sensors 1 radiate radiating light and accept to be generated by fiber Bragg grating sensor 1; And measurement processing portion 3, its optical wavelength that is based on optical wavelength analyzer mensuration is measured and the monitoring environment variable.
A plurality of fiber Bragg grating sensor 1 is connected in series via fiber optic cables.Fiber Bragg grating sensor 1 is along with environmental variances such as strain, temperature and pressure generate reflected light with different refractive indexes.The fiber Bragg grating sensor 1 Fiber Bragg Grating FBG array type sensor that is otherwise known as is a kind of length with regulation with a plurality of Fiber Bragg Grating FBGs is carved into environmental variance such as the light wavelength Yin Wendu that utilizes after the optical fiber from each grid reflection, intensity and the sensor of different characteristic.Usually, for the refractive index that the makes fibre core refractive index greater than covering, and in fibre core, add germanium (Ge), if to fibre core irradiation intensive ultraviolet, the refractive index of optical fiber changes in the time of the distortion of the integrated structure of germanium.
Compare with electric sensor, mechanical pick-up device, above-mentioned fiber Bragg grating sensor 1 has the following advantages:
The first, fully do not receive the influence of electromagnetic induction, so signal do not have noise, thus, the reliability of measured value and precision of measurement are excellent;
The second, can therefore can measure a plurality of environmental variances at maximum about 30 sensor that is connected in series on the optical fiber;
Three, compare with electric sensor, fiber Bragg grating sensor 1 can prolong 10 times with measuring distance, extends to approximately more than tens of kms;
Four, do not receive effects of lightning, in high voltage, strong magnetic field circumstance, can use yet;
Five, do not corrode, permanance is high, does not have hazard of catch fire, therefore also can (hazardous area) use safely in the hazardous location;
Six, sensor life-time is semi-permanent, does not need all to carry out every year pick up calibration (calibration);
Seven, with fiber optic cables with being welding together between optical wavelength analyzer 2 and each fiber Bragg grating sensor 1, therefore compare with electric wire, do not come in contact problems such as bad.
Based on above-mentioned advantage, compare with existing electric sensor, physical sensors, the degree of accuracy of the fiber Bragg grating sensor of present embodiment is higher, the mistake incidence still less.
On the other hand, 2 pairs of above-mentioned optical wavelength analyzers are delivered to the radiating light of fiber Bragg grating sensor 1 by these optical wavelength analyzer 2 radiation spectrum and the catoptrical spectrum that is generated by fiber Bragg grating sensor 1 compare, and measure optical wavelength.For this reason, optical wavelength analyzer 2 comprises the light source that produces radiating light and is used to accept catoptrical light and accepts portion.
The mensuration result who transmits from optical wavelength analyzer 2 calculates in measurement processing portion 3, based on this, environmental variance is mapped to monitor.For this reason, measurement processing portion 3 comprises the computer that data-handling capacity is outstanding.
Fig. 2 representes the Fiber Bragg Grating FBG structure of Fiber Bragg Grating FBG 1, can confirm thus, coats under the state of fibre core 11 at covering 12, disposes a plurality of Fiber Bragg Grating FBGs 13 at fibre core 11.The light of the wavelength of Bragg condition is satisfied in 13 reflections 15 of Fiber Bragg Grating FBG, makes the light transmission 14 of its commplementary wave length.
The fiber Bragg grating sensor of an aforesaid embodiment adopts fiber Bragg grating sensor 1 and does not adopt electric sensor or mechanical pick-up device, therefore can measure environmental variance first-class.
On the other hand; The fiber Bragg grating sensor of one embodiment is connected in series owing to fiber Bragg grating sensor 1; Thereby under situation about opening circuit between the Fiber Bragg Grating FBG 1, can't accept light, and can't reflected light be passed to optical wavelength analyzer 2 from optical wavelength analyzer 2.That is, can't measure the environmental variance of the fiber Bragg grating sensor 1 that opens circuit with optical wavelength analyzer 2.And existing optical wavelength analyzer 2 is no more than 4 channels at most.That is the limited amount system of present fiber Bragg grating sensor 1.This is proposed other following embodiment.
Fig. 3 is the structural drawing of the fiber Bragg grating sensor of expression another embodiment of the present invention.At this moment, a plurality of fiber Bragg grating sensors 101 are identical with an aforesaid embodiment, so omit explanation.
As shown in Figure 3, fiber Bragg grating sensor comprises: a plurality of fiber Bragg grating sensors 101, along with environmental variance generates reflected light with different refractive indexes; Traffic pilot 102, itself and 101 Y-connections of a plurality of fiber Bragg grating sensor generate light path respectively accordingly successively with a plurality of fiber Bragg grating sensors 101; Optical wavelength analyzer 103, the reflected light that it radiates radiating light and accept to be generated by fiber Bragg grating sensor 101 a plurality of fiber Bragg grating sensors 101 is measured optical wavelength; And measurement processing portion 104, its optical wavelength that is based on optical wavelength analyzer 103 mensuration is measured and the monitoring environment variable.Here, the sweep speed of optical wavelength analyzer 103 (scan rate) is 1000Hz, when connecting power supply, in 1 second, implements the process of 1000 times transmitting-receiving light continuously, and will in 1 second, measure 1000 times light wave long value and send to measurement processing portion 104.When connecting power supply, the photoswitch of 102 pairs of inside of traffic pilot applies control signal, during 0～10 millisecond, form make the radiating light that transmits from optical wavelength analyzer 103 through and reflected light passed to the light path of optical wavelength analyzer 103.Form another light path again through 0～10 millisecond, carry out this process successively.
Fig. 4 is a structural drawing of representing fiber Bragg grating sensor as shown in Figure 3 more particularly.At this moment, suppose that fiber Bragg grating sensor has 32 fiber Bragg grating sensors 101.In fact, if form light path with 0～10 millisecond, but in 1 second 100 fiber Bragg grating sensors of sensing.
As shown in Figure 4, traffic pilot 102 comprises first switch portion to the, five switch portion 1021～1025, reference optical fiber Bragg grating sensor 1026 and switch control part 1027.Here, reference optical fiber Bragg grating sensor 1026 plays the effect of initial identifier, that is, reference optical fiber Bragg grating sensor 1026 is the sensors that are used for the position of direct light wavelength analyzer 103 or the initial sensor of measurement processing portion perception.
The second switch portion 1022 and first switch portion 1021 are connected in series, and with reference optical fiber Bragg grating sensor 1026,8 Y-connections of fiber Bragg grating sensor 1 to fiber Bragg grating sensor.Second switch portion 1022 connects respectively successively according to the control of switch control part 1027 and the light path of 8 of first switch portion 1021, reference optical fiber Bragg grating sensor 1026, fiber Bragg grating sensor 1 to fiber Bragg grating sensor.Second switch portion 1022 comprises photoswitch for this reason.
The 3rd switch portion 1023 and first switch portion 1021 are connected in series, and with 16 Y-connections of fiber Bragg grating sensor 9 to fiber Bragg grating sensor.And the 3rd switch portion 1023 connects respectively successively according to the control of switch control part 1027 and the light path of 16 of first switch portion 1021, fiber Bragg grating sensor 9 to fiber Bragg grating sensor.For this reason, the 3rd switch portion 1023 comprises photoswitch.
The 4th switch portion 1024 and first switch portion 1021 are connected in series, and with 24 Y-connections of fiber Bragg grating sensor 17 to fiber Bragg grating sensor.And the 4th switch portion 1024 connects respectively successively according to the control of switch control part 1027 and the light path of 24 of first switch portion 1021, fiber Bragg grating sensor 17 to fiber Bragg grating sensor.For this reason, the 4th switch portion 1024 comprises photoswitch.
The 5th switch portion 1025 and first switch portion 1021 are connected in series, and with 32 Y-connections of fiber Bragg grating sensor 25 to fiber Bragg grating sensor.And the 5th switch portion 1025 connects respectively successively according to the control of switch control part 1027 and the light path of 32 of first switch portion 1021, fiber Bragg grating sensor 25 to fiber Bragg grating sensor.For this reason, the 5th switch portion 1025 comprises photoswitch.
Fig. 5 is the sequential chart that is used to explain the action of switch control part 1027.At this moment, suppose that fiber Bragg grating sensor only measures fiber Bragg grating sensor 1 to fiber Bragg grating sensor 8.
As shown in Figure 5; Switch control part 1027 activates into high level with first bit CONT1 < 1>of first control signal for the light path of optical wavelength analyzer 103 with reference optical fiber Bragg grating sensor 1026, fiber Bragg grating sensor 1 to fiber Bragg grating sensor 8 coupled together at T1 constantly.Switch control part 1027 makes bit CONT1 < 2:4>inactivation of residue first control signal become low level.First switch portion 1021 of first bit CONT1 < 1>of first control signal that acceptance is activated couples together the light path of optical wavelength analyzer 103 with reference optical fiber Bragg grating sensor 1026, fiber Bragg grating sensor 1 to fiber Bragg grating sensor 8.
It is high level that switch control part 1027 activates first bit CONT2 < 1>of second control signal to last bit CONT2 < 8>at T 1 constantly successively.At this moment, preferably, the activation moments of last bit CONT2 < 8>of second control signal is in the activation interval of first bit CONT1 < 1>of first control signal.Then, second switch portion 1022 couples together reference optical fiber Bragg grating sensor 1026 to light fiber Bragg grating sensor 8 successively with the light path of first switch portion 1021, and then couples together with the light path of optical wavelength analyzer 103.At this moment, the remaining bits CONT3 of control signal < 1:8 >～CONT5 < 1:8>inactivation becomes low level.
Following table 1 is illustrated in the recognition methods of measurement processing portion 104 perception fiber Bragg grating sensor 1 to fiber Bragg grating sensors 32.At this moment, suppose during 10 milliseconds, to form light path in the following table 1, same, suppose only fiber Bragg grating sensor 1 to fiber Bragg grating sensor 8 to be measured among Fig. 5.
Table 1
Table 1 in the reference, measurement processing portion 104 preset values are the mensuration to reference optical fiber Bragg grating 1026 if the value measured in predefined value scope, just is perceived as what carry out.That is, be familiar with for measuring beginning.Then, the moment of measuring beginning from perception begins during 10 milliseconds, fiber Bragg grating sensor 2 to be measured, and during 10 milliseconds, successively residue fiber Bragg grating sensor 3 to fiber Bragg grating sensor 8 is measured.
In sum, the fiber Bragg grating sensor of another embodiment of the present invention uses fiber Bragg grating sensor.Compare with electric sensor, mechanical pick-up device, fiber Bragg grating sensor does not receive the influence of electromagnetic induction fully, so signal does not have noise; Can therefore can measure a plurality of environmental variances at maximum about 30 sensor that is connected in series on the optical fiber.And, to compare with electric sensor, fiber Bragg grating sensor can prolong 10 times with measuring distance, extends to approximately more than tens of kms; Do not receive effects of lightning, in high voltage, strong magnetic field circumstance, can use yet; Do not corrode, permanance is high, does not have hazard of catch fire, therefore also can (hazardous area) use safely in the hazardous location; And sensor life-time is semi-permanent, does not need all to carry out every year pick up calibration; , therefore compare being welding together between optical wavelength analyzer and each fiber Bragg grating sensor with fiber optic cables, do not come in contact problems such as bad with electric wire.Based on above-mentioned advantage, compare with existing electric sensor, physical sensors, the degree of accuracy of the fiber Bragg grating sensor of present embodiment is higher, the mistake incidence still less.
And fiber Bragg grating sensor is star connected to the optical wavelength analyzer via traffic pilot, even thereby one of them fiber Bragg grating sensor break down or open circuit, the residue fiber Bragg grating sensor is operate as normal also.Thus, and compared, the wrong incidence of the fiber Bragg grating sensor of present embodiment is obviously low in the past.Simultaneously, measurement processing portion measures the zero hour through the perception of reference optical fiber Bragg grating sensor, cuts apart perception fiber Bragg grating sensor successively through the time afterwards.
Even the fiber Bragg grating sensor of present embodiment uses optical wavelength analyzer in the past, also can be connected with more than ever before fiber Bragg grating sensor through traffic pilot.As stated, current optical wavelength analyzer is connected with fiber Bragg grating sensor with 4 channels at most.In this process, in order to be connected, and fiber Bragg grating sensor is connected in series with the more optical fiber Bragg grating sensor, thus, under the middle situation about opening circuit, many fiber Bragg grating sensors are not worked.But; The fiber Bragg grating sensor of present embodiment is owing to a channel configuration traffic pilot at the optical wavelength analyzer; And traffic pilot is connected with a large amount of fiber Bragg grating sensors according to the configuration of switch portion, thereby can overcome the restriction of the channel of optical wavelength analyzer.
As stated, the present invention is not limited to the above embodiments and accompanying drawing, and the those of ordinary skill of technical field should be understood that and can in the scope that does not break away from technological thought of the present invention, carry out various displacements, distortion and change under the present invention.
Claims (5)
1. fiber Bragg grating sensor that utilizes multichannel with traffic pilot comprises: the optical wavelength analyzer, and radiate radiating light and accept reflected light, analyze above-mentioned radiating light and above-mentioned catoptrical spectrum is measured optical wavelength; And a plurality of fiber Bragg grating sensors, accept above-mentioned radiating light and along with environmental variance produces reflected light with different refractive index,
Above-mentioned fiber Bragg grating sensor is characterised in that,
Comprise:
Traffic pilot, itself and above-mentioned a plurality of fiber Bragg grating sensor are distinguished Y-connection, and generate above-mentioned radiating light of transmission and above-mentioned catoptrical light path respectively accordingly successively with above-mentioned a plurality of fiber Bragg grating sensors,
Measurement processing portion, above-mentioned environmental variance is measured and kept watch on to its optical wavelength that is based on above-mentioned optical wavelength analyzer mensuration;
Above-mentioned a plurality of fiber Bragg grating sensor also comprises the reference optical fiber Bragg grating sensor, and this reference optical fiber Bragg grating sensor is used for the perception of guiding measuring handling part and measures the zero hour.
2. the fiber Bragg grating sensor that utilizes multichannel with traffic pilot according to claim 1; It is characterized in that; Above-mentioned optical wavelength analyzer comprises above-mentioned radiating light of transmission and above-mentioned catoptrical channel, and above-mentioned channel and above-mentioned traffic pilot are connected in series.
3. the fiber Bragg grating sensor that utilizes multichannel with traffic pilot according to claim 1; It is characterized in that; If initial measurement is in predefined measurement range; Above-mentioned measurement processing portion just perceives as and is based on the measurement that the said reference fiber Bragg grating sensor carries out, and successively the residue fiber Bragg grating sensor is measured afterwards.
4. the fiber Bragg grating sensor that utilizes multichannel with traffic pilot according to claim 1 is characterized in that above-mentioned traffic pilot comprises:
First switch portion, itself and above-mentioned optical wavelength analyzer be connected in series and with the five switch portion Y-connections of second switch portion to the, respond that first control signal forms respectively and above-mentioned optical wavelength analyzer, above-mentioned second switch portion to the five switch portion between light path;
Second switch portion; Itself and above-mentioned first switch portion be connected in series and with reference optical fiber Bragg grating sensor, 8 Y-connections of fiber Bragg grating sensor 1 to fiber Bragg grating sensor, respond that second control signal forms respectively successively and the light path of 8 of above-mentioned first switch portion, said reference fiber Bragg grating sensor, above-mentioned fiber Bragg grating sensor 1 to fiber Bragg grating sensor;
The 3rd switch portion; Itself and above-mentioned first switch portion be connected in series and with 16 Y-connections of fiber Bragg grating sensor 9 to fiber Bragg grating sensor, respond the light path that the 3rd control signal forms 16 of above-mentioned first switch portion, above-mentioned fiber Bragg grating sensor 9 to fiber Bragg grating sensor successively respectively; And
The switch control part, its activate along with the time be activated successively above-mentioned first control signal to above-mentioned the 3rd control signal.
5. the fiber Bragg grating sensor that utilizes multichannel with traffic pilot according to claim 4 is characterized in that, above-mentioned first switch portion to above-mentioned the 5th switch portion comprises photoswitch.
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| KR10-2011-0050711 | 2011-05-27 | ||
| KR1020110050711A KR101063337B1 (en) | 2011-05-27 | 2011-05-27 | Fiber bragg grating sensing system using the multiplexer for multi-channel |
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| CN102798408A true CN102798408A (en) | 2012-11-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017804A (en) * | 2012-12-26 | 2013-04-03 | 中国科学院上海光学精密机械研究所 | High-time-synchronization multichannel fiber bragg grating sensing system |
| CN104215357A (en) * | 2014-07-09 | 2014-12-17 | 武汉轻工大学 | Aquatic product cold chain temperature measurement system and method based on optical fiber sensor |
| CN114383640A (en) * | 2021-12-16 | 2022-04-22 | 之江实验室 | Distributed fiber Bragg grating sensor measurement and control system |
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| CN103047934A (en) * | 2011-10-14 | 2013-04-17 | 无锡阿斯特科技有限公司 | Optical fiber sensing microspur measurement system |
| KR101958403B1 (en) * | 2017-08-09 | 2019-07-04 | 조선대학교산학협력단 | The Metal corrosion monitoring system |
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| CN104215357A (en) * | 2014-07-09 | 2014-12-17 | 武汉轻工大学 | Aquatic product cold chain temperature measurement system and method based on optical fiber sensor |
| CN114383640A (en) * | 2021-12-16 | 2022-04-22 | 之江实验室 | Distributed fiber Bragg grating sensor measurement and control system |
| CN114383640B (en) * | 2021-12-16 | 2024-06-11 | 之江实验室 | Distributed optical fiber Bragg grating sensor measurement and control system |
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| KR101063337B1 (en) | 2011-09-07 |
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