CN105043426A - Method for on-line monitoring and adjustment of performance of fiber sensor - Google Patents
Method for on-line monitoring and adjustment of performance of fiber sensor Download PDFInfo
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- CN105043426A CN105043426A CN201510500562.7A CN201510500562A CN105043426A CN 105043426 A CN105043426 A CN 105043426A CN 201510500562 A CN201510500562 A CN 201510500562A CN 105043426 A CN105043426 A CN 105043426A
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- Prior art keywords
- optical sensor
- fibre optical
- transmitting terminal
- receiving end
- performance
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Abstract
The invention provides a method for on-line monitoring and adjustment of a performance of a fiber sensor. The fiber sensor comprises a transmitting terminal and a receiving terminal; and the transmitting terminal and the receiving terminal are connected optically by a light path coupling transmission system. The method comprises: the fiber sensor starts to work; after the fiber sensor works for a period of monitoring time, a drive current of the transmitting terminal and a response current of the receiving terminal are sampled; after the fiber sensor works for the next period of monitoring time, the drive current of the transmitting terminal is kept to be unchanged and the response current of the receiving terminal is sampled again; a difference value of the drive currents that are sampled twice is compared with a preset multiple of the drive current sampled at the first time; and then according to the comparison result, performance adjustment of the fiber sensor is determined and executed. With the method, the performance of the fiber sensor can be monitored in an on-line mode and can be determined and maintained automatically; and the cost is reduced.
Description
Technical field
The present invention relates to sensory field, especially about on-line monitoring and the method regulating Fibre Optical Sensor performance.
Background technology
Sensor is towards sensitive, accurate, strong adaptability, small and exquisite and intelligentized future development.In this course, the newcomer of this sensor family of Fibre Optical Sensor gains great popularity.Optical fiber has a lot of excellent performance, and such as: the performance with anti-electromagnetism and atomic radiation interference, footpath is thin, matter is soft, lightweight mechanical property; Insulation, inductionless electric property; Water-fast, high temperature resistant, corrosion resistant chemical property etc., the place (as high-temperature region) that it can not reach people, or the area be pernicious to people (as nuclear radiation district), play the effect of the knowledge of people, and the physiological limits of people can also be surmounted, the sense organ of recipient experience less than external information.
As shown in Figure 1, Fibre Optical Sensor comprises transmitting terminal 10 and receiving end 20, and wherein transmitting terminal 10 and receiving end 20 carry out optical connections by light path coupled transmission system 30.But in three parts that Fibre Optical Sensor comprises, the change of any portion work efficiency all directly affects the performance of Fibre Optical Sensor, causes the economic loss even security incident that can not estimate.The main cause of transmitting terminal 10 performance change is wherein caused to comprise: the change etc. of the acute variation of temperature, humidity or light source self light-emitting efficiency characteristics; The main cause of light path coupled transmission system 30 performance change is caused to comprise: fiber ageing, pollutant such as fiber end face deposition dust, greasy dirt etc., optical fiber off-target coupling position etc.; The main cause of receiving end 20 hydraulic performance decline is caused to comprise: degradation under optical power detector Photoresponse.
Wherein for the monitoring of transmitting terminal 10 light source works performance, conventional method is: increase an optical power detector at transmitting terminal 10, for monitoring light source luminous power in real time.If monitor light source light power have significant change, then regulate the drive current of light source.The serviceability of transmitting terminal 10 can only be monitored while but the method for this increase optical power detector adds cost of products, cannot the serviceability of simultaneously reflected optical path coupled transmission system 30 and receiving end 20.
Summary of the invention
The invention provides the method for on-line monitoring and adjustment Fibre Optical Sensor performance, its goal of the invention is: when transmitting terminal, light path coupled transmission system, receiving end make the serviceability of Fibre Optical Sensor change for some reason, can real time on-line monitoring transmitting terminal, light path coupled transmission system, receiving end performance.
Another goal of the invention of the present invention is: reduce production cost while ensureing Fibre Optical Sensor properties of product.
In order to reach foregoing invention object, technical scheme provided by the invention is as follows: the method for on-line monitoring and adjustment Fibre Optical Sensor performance, its Fibre Optical Sensor comprises transmitting terminal and receiving end, and wherein transmitting terminal and receiving end carry out optical connections by light path coupled transmission system; Its step comprises: first, and Fibre Optical Sensor is started working; Secondly, after Fibre Optical Sensor runs a monitoring time section, the sampling drive current of transmitting terminal and the response current of receiving end, then after Fibre Optical Sensor runs next monitoring time section, keep transmitting terminal drive current constant, again to sample the response current of receiving end, and by double sampling to difference and first time of response current preset multiple of response current of sampling compare; Finally, according to the comparative result of previous step, judge the property regulation performing Fibre Optical Sensor.
Wherein, preferred implementation is: when Fibre Optical Sensor runs to a certain monitoring time section, when the response current of sampling receiving end does not exceed default variation range, without the need to regulating Fibre Optical Sensor; Now, the receiving end response current that previous step judges next monitoring time section is returned.
Wherein, preferred implementation is: when Fibre Optical Sensor runs to a certain monitoring time section, when the response current of sampling receiving end exceedes preset range, takes up to judge and regulate from the driving light source of transmitting terminal.
Wherein, preferred implementation is: the drive current of transmitting terminal does not exceed higher limit, then by after the drive current of transmitting terminal again assignment, enter next monitoring time section; The drive current of transmitting terminal exceedes higher limit, and now Fibre Optical Sensor quits work, and exports warning.
Wherein, preferred implementation is: said method can be applicable in the Fibre Optical Sensor of the Strength Changes work utilizing light.
The method of on-line monitoring of the present invention and adjustment Fibre Optical Sensor performance has the following advantages and good effect compared to prior art: first, the performance of on-line monitoring Fibre Optical Sensor; Secondly, automatic decision also safeguards Fibre Optical Sensor performance, when obvious fault appears in the optic path coupled system of Fibre Optical Sensor, exports warning prompt user and checks and repair; Finally, cost-saving.
Accompanying drawing explanation
Fig. 1 is the light channel structure schematic diagram of Fibre Optical Sensor.
Fig. 2 is the process flow diagram of Fibre Optical Sensor threshold value dynamic adjustments of the present invention.
Embodiment
For making there is further understanding to object of the present invention, structural attitude and function thereof, accompanying drawing is coordinated to be described in detail as follows.Should be appreciated that the specific embodiment described by this part only in order to explain the present invention, can be not intended to limit the present invention.
Please refer to Fig. 1, Fig. 1 is the light channel structure schematic diagram of Fibre Optical Sensor.Fibre Optical Sensor comprises transmitting terminal 10 and receiving end 20, and wherein transmitting terminal 10 and receiving end 20 carry out optical connections by light path coupled transmission system 30.
When Fibre Optical Sensor installs in application scenario, after starting working, wherein:
Time period t
1in, the drive current of transmitting terminal 10 is I
e1, from transmitting terminal 10 to the overall operating efficiency of receiving end 20 be η
t1, the response current I of now receiving end 20 output
r1for:
I
r1=I
e1η
t1(formula 1a)
Wherein, from transmitting terminal 10 to the overall operating efficiency of receiving end 20
η
t1=η
e1* η
c1* η
r1, (formula 1b)
Wherein η
e1for the luminescence efficiency of transmitting terminal 10 light source, η
c1for the work efficiency of light path coupled transmission system 30, η
r1for the receiving efficiency η of receiving end 20
r1.
Time period t
2in, when the drive current of transmitting terminal 10 does not change, now from transmitting terminal 10 to the overall operating efficiency of receiving end 20 be η
t2, the response current I of now receiving end 20 output
r2for:
I
r2=I
e1η
t2(formula 2a)
Wherein, η
t2≠ η
t1.This means that in transmitting terminal 10, light path coupled transmission system 30, receiving end 20, at least one of them performance there occurs change.But the position of concrete change needs to judge further.
Referring again to the method flow diagram that Fig. 2, Fig. 2 are dynamic adjustments Fibre Optical Sensor threshold value.Its step is as follows:
S10: Fibre Optical Sensor is started working;
S20: time period t
1in, I
r1=I
e1η
t1.
S30: time period t
2in, I
r2=I
e1η
t2.
S40: control program is incited somebody to action | I
r2-I
r1| with I
r1* T makes comparisons.Wherein, T is default proportional numerical value.
S401: if | I
r2-I
r1| <I
r1* T, then what think that Fibre Optical Sensor is subject to is some perturbations, without the need to adjustment and report to the police; Return S20 step and perform subsequent time period monitoring.
S402: if | I
r2-I
r1|>=I
r1* T, then first take up to judge and regulate from the light source of transmitting terminal 10.
S50: control program will
with I
eTcompare.Wherein, I
eTfor light source drive current higher limit.
S501: if
then show that light source drive current does not exceed light source drive current higher limit, by light source drive current assignment be now
now from transmitting terminal 10 to the overall operating efficiency η ' of receiving end 20
t2=η
t1; Return S20 step and perform subsequent time period monitoring.
S502: if
then show that light source drive current has exceeded light source drive current higher limit, then illustrate only regulate transmitting terminal luminous power cannot again by Fibre Optical Sensor property retention to originally debuging, now Fibre Optical Sensor can quit work, in order to avoid cause irreversible infringement to light source, and exporting warning, prompting user checks light path coupled transmission system 30 and receiving end 20.
Said method is mainly used in the Fibre Optical Sensor of the Strength Changes work utilizing light.
The method of on-line monitoring of the present invention and adjustment Fibre Optical Sensor performance has the following advantages and good effect compared to prior art: first, the performance of on-line monitoring Fibre Optical Sensor; Secondly, automatic decision also safeguards Fibre Optical Sensor performance, when obvious fault appears in the optic path coupled system 30 of Fibre Optical Sensor, exports warning prompt user and checks and repair; Finally, cost-saving.
The above, be only preferred embodiment, and not for limiting the scope of the invention, all equivalences done according to the present patent application the scope of the claims change or modify, and are all the present invention and contain.
Claims (5)
1. the method for on-line monitoring and adjustment Fibre Optical Sensor performance, its Fibre Optical Sensor comprises transmitting terminal (10) and receiving end (20), and wherein transmitting terminal (10) and receiving end (20) carry out optical connections by light path coupled transmission system (30); Its step comprises: first, and Fibre Optical Sensor is started working; Secondly, after Fibre Optical Sensor runs a monitoring time section, the drive current of sampling transmitting terminal (10) and the response current of receiving end (20), then after Fibre Optical Sensor runs next monitoring time section, keep transmitting terminal (10) drive current constant, again to sample the response current of receiving end (20), and by double sampling to difference and first time of response current preset multiple of response current of sampling compare; Finally, according to the comparative result of previous step, judge the property regulation performing Fibre Optical Sensor.
2. the method for on-line monitoring as claimed in claim 1 and adjustment Fibre Optical Sensor performance, it is characterized in that: when Fibre Optical Sensor runs to a certain monitoring time section, when the response current of sampling receiving end (20) does not exceed preset range, without the need to regulating Fibre Optical Sensor; Now, the response current that previous step judges the receiving end (20) of next monitoring time section is returned.
3. the method for on-line monitoring as claimed in claim 1 and adjustment Fibre Optical Sensor performance, it is characterized in that: when Fibre Optical Sensor runs to a certain monitoring time section, when the response current of sampling receiving end (20) exceedes preset range, take up to judge and regulate from the driving light source of transmitting terminal (10).
4. the method for on-line monitoring as claimed in claim 3 and adjustment Fibre Optical Sensor performance, it is characterized in that: the drive current of transmitting terminal (10) does not exceed higher limit, then by after the drive current of transmitting terminal (10) again assignment, enter next monitoring time section; The drive current of transmitting terminal (10) exceedes higher limit, and now Fibre Optical Sensor quits work, and exports warning.
5. the method for the on-line monitoring as described in claim 1,2,3 or 4 and adjustment Fibre Optical Sensor performance, is characterized in that: said method can be applicable to utilize in the Fibre Optical Sensor of the Strength Changes work of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500562.7A CN105043426A (en) | 2015-08-14 | 2015-08-14 | Method for on-line monitoring and adjustment of performance of fiber sensor |
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|---|---|---|---|
| CN201510500562.7A CN105043426A (en) | 2015-08-14 | 2015-08-14 | Method for on-line monitoring and adjustment of performance of fiber sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020102995A1 (en) * | 2018-11-20 | 2020-05-28 | 深圳市大耳马科技有限公司 | Adaptive adjustment method, device and system for optical fiber sensor |
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| JP2014035188A (en) * | 2012-08-07 | 2014-02-24 | Panasonic Corp | Motor position detector |
| CN103840364A (en) * | 2014-02-18 | 2014-06-04 | 青岛海信宽带多媒体技术有限公司 | Wavelength control method and device of tunable laser |
| CN104683601A (en) * | 2013-11-29 | 2015-06-03 | 红板凳科技股份有限公司 | Detection method and detection device of working condition of telephone set |
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2015
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777299A (en) * | 2008-12-30 | 2010-07-14 | 东部高科股份有限公司 | Apparatus and method for receiving data |
| CN102288888A (en) * | 2011-06-12 | 2011-12-21 | 华北电力大学（保定） | Device and method for monitoring performance of semiconductor laser device of electric pump |
| EP2541212A1 (en) * | 2011-06-29 | 2013-01-02 | Schneider Electric Industries SAS | Low-power detection system |
| JP2014035188A (en) * | 2012-08-07 | 2014-02-24 | Panasonic Corp | Motor position detector |
| CN103428982A (en) * | 2013-05-28 | 2013-12-04 | 福州英诺电子科技有限公司 | Light intensity self-adjusting circuit for fluorescence fiber stimulation |
| CN104683601A (en) * | 2013-11-29 | 2015-06-03 | 红板凳科技股份有限公司 | Detection method and detection device of working condition of telephone set |
| CN103840364A (en) * | 2014-02-18 | 2014-06-04 | 青岛海信宽带多媒体技术有限公司 | Wavelength control method and device of tunable laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020102995A1 (en) * | 2018-11-20 | 2020-05-28 | 深圳市大耳马科技有限公司 | Adaptive adjustment method, device and system for optical fiber sensor |
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Application publication date: 20151111 |