CN208333700U - A kind of fibre optical sensor for ocean temperature profile survey - Google Patents
A kind of fibre optical sensor for ocean temperature profile survey Download PDFInfo
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- CN208333700U CN208333700U CN201821019423.8U CN201821019423U CN208333700U CN 208333700 U CN208333700 U CN 208333700U CN 201821019423 U CN201821019423 U CN 201821019423U CN 208333700 U CN208333700 U CN 208333700U
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Abstract
The utility model discloses a kind of fibre optical sensors for ocean temperature profile survey, it mainly include capillary, fiber grating, flexible sheet, capillary is fixed using laser spot welding technology with fiber grating, capillary one end connects flexible sheet, electrostatic bonding is used between capillary and flexible sheet, fiber grating is in the middle position of capillary, optical fiber and flexible sheet and circular groove forms optical fiber F-P sensor.The utility model design proposes that a kind of fibre optical sensor for ocean temperature profile survey uses the series demultiplex technology of optical fiber F-P sensor and fiber-optic grating sensor, sensing and demodulation while pressure and temperature can be achieved, and the size of sensor is greatly lowered, the length of sensor can accomplish within 2cm, have many advantages, such as micromation, fast response time, of simple structure and low cost.
Description
Technical field
The utility model relates to the fields of sensor, and in particular to a kind of Fibre Optical Sensor for ocean temperature profile survey
Device.
Background technique
Jettisoning the deep measuring instrument of formula temperature is that one kind can measure the device of ocean temperature section in the case where ship walks boat state, due to
It can fast speed real-time measurement, and advantage of lower cost is widely used in fields such as ocean scientific investigation, military affairs.Tradition
The sensor that uses of the deep measuring instrument of temperature be electronic temperature transmitter, do not include depth transducer, depth data is passed through by depth
It tests formula to be calculated, but depth data is related with many factors, such as probe enters water posture, empirical equation accuracy, and one
The a certain factor of denier occurs surprisingly, and the accuracy of measurement cannot guarantee well.What spirit etc. less of Hangzhou applied acoustics research institute
People obtains the depth value of probe by introducing fiber bragg grating pressure sensor in real time, and using fiber grating as temperature sensing
Device improves the deficiency of the deep measuring instrument of traditional temperature.However due to needing two gratings, the size of sensor is larger, is unfavorable for visiting
The miniaturization of head, while biggish size is led and is unfavorable for quick heat exchange, the temperature-responsive speed of sensor is slower.
Utility model content
The purpose of the utility model is to overcome the shortcomings of the prior art, and provide a kind of for ocean temperature section
The fibre optical sensor of measurement.
The purpose of this utility model is completed by following technical solution: this for ocean temperature profile survey
Fibre optical sensor, mainly includes capillary, fiber grating, flexible sheet, and capillary uses laser spot welding technology and fiber grating
Fixed, capillary one end connects flexible sheet, and electrostatic bonding is used between capillary and flexible sheet, and fiber grating is in capillary
The middle position of pipe, optical fiber and flexible sheet and circular groove form optical fiber F-P sensor.
The capillary form is hourglass-shaped, and has a circular groove in capillary one end, and circular groove is added using laser
The production of work technology.
The material of the capillary, fiber grating and flexible sheet is quartz.
The optical fiber F-P sensor that the optical fiber and flexible sheet and circular groove are formed is pressure sensor, fiber grating
For temperature sensor.
The working principle of the utility model is: the chamber length of optical fiber F-P sensor can by detecting its reflected light signal, and
It demodulates to obtain using certain algorithm.When ambient pressure changes, deformation occurs for flexible sheet, so as to cause optical fiber F-P sensor
Chamber long linear change occurs；When ambient temperature changes, the thermal expansion effects of capillary can also cause optical fiber F-P to pass
The chamber of sensor is long to occur linear change.The utility model is using full quartz construction and without adhesive process, the temperature sensitivity system of sensor
Number is very low；The pressure of optical fiber F-P sensor can be increased by the radius for improving circular groove or the thickness for reducing flexible sheet
Sensitivity, higher pressure-sensitivity also can reduce influence of the temperature to pressure measurement, can be approximately considered optical fiber F-P sensor
Chamber it is long only influenced by pressure, therefore by the change of cavity length of demodulation optical fiber F-P sensor, ambient pressure value can be calculated.
The center wavelength variation of fiber grating is only influenced by temperature, the temperature change of available fiber grating measuring environment.To avoid temperature
The influence to optical fiber F-P sensor pressure measurement is spent, can also be sensed by the temperature value compensated optical fiber enamel amber that fiber grating measures
The change of cavity length of device improves pressure measurement accuracy.
The utility model has the following beneficial effects:
1, the utility model overcomes in the deep measuring instrument of existing temperature that size sensor is larger, and temperature-responsive is slow to be lacked
Point, provide it is a kind of micromation, quick response ocean temperature profile survey fibre optical sensor.The sensor structure is simple,
It is easy to demodulate, has biggish advantage jettisoning the deep fields of measurement of formula temperature after successful application.
2, the utility model proposes a kind of fibre optical sensor for ocean temperature profile survey using optical fiber F-P pass
The series demultiplex technology of sensor and fiber-optic grating sensor is, it can be achieved that sensing and demodulation while pressure and temperature, and substantially
Degree reduces the size of sensor, and the length of sensor can accomplish within 2cm.
3, the capillary that the utility model uses, shape be it is hourglass-shaped, improve sensor and extraneous contact area, knot
The advantage of micromation is closed, it can be achieved that faster temperature-responsive.
4, the micromation of sensor may be implemented in the utility model, and improves the temperature-responsive speed of sensor, in ocean
There are certain advantages for temperature profile fields of measurement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the reflectance spectrum figure of the utility model.
Fig. 3 is the demodulating system schematic diagram of the utility model.
Description of symbols: capillary 1, fiber grating 2, flexible sheet 3, circular groove 4, optical fiber F-P sensor 5, width
Band light source 6, fiber coupler 7, transmission fiber 8, sensor 9, optical fiber sensing analyzer 10, computer 11.
Specific embodiment
Detailed introduction is done to the utility model below in conjunction with attached drawing:
As shown in the picture, this fibre optical sensor for ocean temperature profile survey mainly includes capillary 1, optical fiber
Grating 2, flexible sheet 3, capillary 1 is fixed using laser spot welding technology and fiber grating 2, and 1 one end of capillary connects elastic membrane
Piece 3 uses electrostatic bonding between capillary 1 and flexible sheet 3, fiber grating 2 be in the middle position of capillary 1, optical fiber and
Flexible sheet 3 and circular groove 4 form optical fiber F-P sensor 5.
1 shape of capillary is hourglass-shaped, and is had a circular groove (4) in 1 one end of capillary, and circular groove 4 uses
Laser processing technology production.
The material of the capillary 1, fiber grating 2 and flexible sheet 3 is quartz.
The optical fiber F-P sensor 5 that the optical fiber and flexible sheet 3 and circular groove 4 are formed is pressure sensor, optical fiber
Grating 2 is temperature sensor.
Capillary 1 is reduced as far as possible in the thickness of center, and rate of heat exchange can be improved.2 grid region length of fiber grating
Generally in 5-10mm or so, the length of capillary 1 can use 15mm, and the length of entire sensor 9 is less than 20mm.
The working principle of the utility model is: the chamber length of optical fiber F-P sensor 5 can by detecting its reflected light signal, and
It demodulates to obtain using certain algorithm.When ambient pressure changes, deformation occurs for flexible sheet 3, so as to cause optical fiber F-P sensing
The chamber of device 5 is long to occur linear change；When ambient temperature changes, the thermal expansion effects of capillary 1 can also cause optical fiber enamel
The chamber of amber sensor 5 is long to occur linear change.The utility model is using full quartz construction and without adhesive process, the temperature of sensor 9
Sensitivity coefficient is very low；Optical fiber F-P sensing can be increased by the radius for improving circular groove 4 or the thickness for reducing flexible sheet 3
The pressure-sensitivity of device 5, higher pressure-sensitivity also can reduce influence of the temperature to pressure measurement, can be approximately considered optical fiber enamel
The chamber of amber sensor 5 is long only to be influenced by pressure, therefore by the change of cavity length of demodulation optical fiber F-P sensor 5, can be calculated
Ambient pressure value.The center wavelength variation of fiber grating 2 is only influenced by temperature, and available fiber grating 2 measures the temperature of environment
Variation.For the influence for avoiding 5 pressure measurement of temperature on fiber F-P sensor, the temperature value that can also be measured by fiber grating 2
The change of cavity length of compensated optical fiber F-P sensor 5 improves pressure measurement accuracy.
The thickness of flexible sheet 3 and the diameter of circular groove 4 can be determined according to pressure measurement range and sensitivity.Pressure
The sensitivity of sensor and maximum measurement pressure are respectively as follows:
Wherein, a is the radius of circular groove 4, and h is the thickness of flexible sheet 3, and μ and E are respectively the Poisson's ratio of diaphragm material
And Young's modulus.
Embodiment 1: when ambient temperature changes, the central wavelength of fiber grating 2 changes.The utility model sensor
9 reflectance spectrum signal is as shown in Fig. 2, specifically sensor demodulating system is as shown in figure 3, the optical fiber coupling that wideband light source 6 issues
Clutch 7 enters sensor 9, and the optical signal that sensor 9 is reflected back enters optical fiber sensing analyzer 10, optical fiber through fiber coupler 7
Sensing analysis instrument 10 collects the reflectance spectrum signal of sensor 9, and is transmitted to computer 11, by data processing section
It realizes the demodulation of signal, obtains the chamber long value of optical fiber F-P sensor 5 and the central wavelength drift value of fiber grating 2.To sensing
Device 9 calibrates pressure-sensitivity and temperature sensitivity in advance, and extraneous pressure can be recovered from chamber long value and central wavelength drift value
Force value and temperature value.Can be by the peak value of detection signal to the demodulation of fiber grating 2, it can to the demodulation of optical fiber F-P sensor 5
After data near fiber grating 2 are removed, demodulated using crosscorrelation demodulating algorithm.
It is understood that it will be understood by those skilled in the art that the technical solution of the utility model and utility model structure
Think of is subject to equivalent substitution or change all and should belong to the protection scope of the utility model the attached claims.
Claims (4)
1. a kind of fibre optical sensor for ocean temperature profile survey, it is characterised in that: mainly include capillary (1), optical fiber
Grating (2), flexible sheet (3), capillary (1) is fixed using laser spot welding technology and fiber grating (2), capillary (1) one end
It connects flexible sheet (3), electrostatic bonding is used between capillary (1) and flexible sheet (3), fiber grating (2) is in capillary
(1) middle position, optical fiber and flexible sheet (3) and circular groove (4) form optical fiber F-P sensor (5).
2. the fibre optical sensor according to claim 1 for ocean temperature profile survey, it is characterised in that: the capillary
It is hourglass-shaped for managing (1) shape, and is had a circular groove (4) in capillary (1) one end, and circular groove (4) is using laser processing skill
Art production.
3. the fibre optical sensor according to claim 1 for ocean temperature profile survey, it is characterised in that: the capillary
The material for managing (1), fiber grating (2) and flexible sheet (3) is quartz.
4. the fibre optical sensor according to claim 1 for ocean temperature profile survey, it is characterised in that: the optical fiber
The optical fiber F-P sensor (5) formed with flexible sheet (3) and circular groove (4) is pressure sensor, and fiber grating (2) is temperature
Spend sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821019423.8U CN208333700U (en) | 2018-06-29 | 2018-06-29 | A kind of fibre optical sensor for ocean temperature profile survey |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821019423.8U CN208333700U (en) | 2018-06-29 | 2018-06-29 | A kind of fibre optical sensor for ocean temperature profile survey |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432642A (en) * | 2021-06-09 | 2021-09-24 | 西安交通大学 | Embedded multi-parameter optical fiber composite sensor and manufacturing method thereof |
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2018
- 2018-06-29 CN CN201821019423.8U patent/CN208333700U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432642A (en) * | 2021-06-09 | 2021-09-24 | 西安交通大学 | Embedded multi-parameter optical fiber composite sensor and manufacturing method thereof |
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