GB2457903A - Optical fibre temperature sensing device - Google Patents
Optical fibre temperature sensing device Download PDFInfo
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- GB2457903A GB2457903A GB0803583A GB0803583A GB2457903A GB 2457903 A GB2457903 A GB 2457903A GB 0803583 A GB0803583 A GB 0803583A GB 0803583 A GB0803583 A GB 0803583A GB 2457903 A GB2457903 A GB 2457903A
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- 239000013307 optical fiber Substances 0.000 title abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 93
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 238000005253 cladding Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 12
- 230000035945 sensitivity Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- 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
- G01D5/35303—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 a reference fibre, e.g. interferometric devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
A temperature sensor device 1 comprising a single mode bent optical fibre loop, wherein the optical fibre 3 is stripped of its buffer layer along a length of the fibre loop, constituting the sensor head 2, and an absorption layer (13) which is adhered to the outer surface of the fibre cladding (15). The absorption layer comprises a material configured to absorb light at the wavelength of operation of a light source and is configured to absorb whispering gallery modes. The bend radius of the fibre may be fixed such that the device provides an output characteristic which is linear with temperature at an operating wavelength. A change in temperature is measured by measuring the ratio change of the optical power of a signal transmitted via the sensor head to that of a signal transmitted via a reference arm 8. A method of manufacturing said device is also disclosed.
Description
1 2457903 Title A temperature sensor device
Field of the Application
The present application relates to temperature sensors and in particular to temperature sensors employing a bent optical fibre loop as the sensor.
Background
In one approach as described for example in FR2664695, an intrinsic type optical fibre temperature sensor is fabricated using a multimode fibre by winding the fibre for a number of turns. The sensor is based on mode modulation. However, such a temperature sensor has a number of disadvantages. It contains a significant number of bend turns, and thus has the disadvantage of requiring a considerable amount of space, and also adding a spatial gradient of temperature between the bend fibres within the sensor head. Furthermore it uses a multimode fibre; a fibre of this type carries a large number of propagation modes, which depend on the optogeometrical properties of the fibre. Hence it is very difficult to obtain identical modal distributions from one sensor to other, with the disadvantage of reduced repeatability. Also this approach doesn't include any way to compensate the power fluctuation of the input laser source and as the temperature is derived as a function of measured power, power fluctuation of the source laser adds errors to the measured temperature.
In another approach for example such as in US651 1222, the requirement for a large number of turns for an optical fibre temperature sensor was addressed by mounting the sensitive portions of the optical fibre on a planar support, bent over a pre-determined length and with a pro-determined curvature amplitude. In this sensor, however, the determination of bend periods and curvature amplitude is necessary to avoid any mode coupling between the trapped modes and the radiated modes. This device is also based on multimode fibre and all the disadvantages of multimode fibre are also inherent to this approach. The method employs a parabolic index profile type multimode fibre. The sensor requires a complex shaping process to make the sensitive portion of the sensor. A reason for which is that the sensor includes a number of bends, the bend radius and amplitude of which should be precise to obtain the optimum coupling between all the trapped modes without causing coupling with the radiated modes.
In a further approach, the use of single mode fibres has been suggested.
However, in such a configuration the presence of whispering gallery modes makes the measurement process complex and interlerometric techniques are required to extract temperature information. Specifically this approach needs phase measurement and requires relatively complicated signal processing techniques to accomplish effective phase recovery. Interferometric techniques are complex requiring significant construction, set-up, maintenance and operation steps.
There are therefore a number of problems that need to be addressed with existing fibre temperature sensors, employing bends in the fibre.
Summary
These needs and others are addressed by a fibre temperature sensor in accordance with the teachings of the present application.
Accordingly, the present application provides a temperature sensor in accordance with claim I and a method of manufacture in accordance with claims 14 and 15. Other features are set forth in the dependent claims therefrom.
Further, there is provided a temperature sensor device having a sensor head comprising a single mode bent fibre loop.
the bent fibre loop comprising a buffer stripped fibre coated with an absorption layer configured to absorb whispering gallery modes of the fibre, and wherein the bend radius of the fibre is fixed such that the device provides an output characteristic which is linear with temperature at an operating wavelength.
In one embodiment, the fibre has a high bend loss.
In another embodiment the fibre has a core and a cladding and wherein the absorption layer is adhered to the outer surface of the cladding.
In a further embodiment the absorption layer is configured to absorb the reflected light at the cladding-air interface of the bend fibre loop.
In one embodiment the absorption layer comprised of a material configured to absorb light at the wavelength of operation.
In another embodiment the sensor head is connected to a ratiometric interrogation system to which an input signal is provided and the input signal is split into a first sensor signal transmittable via the sensor head to a sensor signal detector and a second reference signal transmittable via a reference arm to a reference signal detector.
In a further embodiment a change in temperature is measured by measuring the change in ratio NB of the optical power A of the signal transmitted via the sensor head and the optical power B of the reference signal.
In one embodiment the operating wavelength may be varied to vary temperature sensitivity of the device.
In another embodiment the bond loss of the fibre may be varied to vary the temperature sensitivity of the device.
In a further embodiment the bend radius of the fibre may be varied to provide varied temperature resolution.
These and other features of the application will be better understood with reference to the following drawings which are of exemplary embodiments of the invention and are not intended to be construed as limiting in any manner. As will be appreciated by those skilled in the art, modifications and adaptations can be made to the exemplary embodiments described below without departing from the spirit and scope of the application.
BrIef Description Of The Drawings
The present application will now be described with reference to the accompanying drawings in which: Figure 1 is a schematic view of a temperature sensor system according to an exemplary implementation of the application; Figure 2 is a detailed schematic view of an exemplary sensor head of the system of Fig.1; Figure 3 is a detailed cross-sectional view of the fibre within the sensor head of Fig. 2; Figure 4 is a graph showing the experimental results for an exemplary system; and Figure 5 is a graph showing the measured variation in the ratio for step changes of temperature by 1 °C from 30°C to 25°C for an exemplary system.
Detailed Description Of The Drawings
The present application is directed to a fibre temperature sensor comprising a single mode bend fibre loop. Suitably, the sensor employs a ratiometric measurement scheme.
In more detail, referring to the drawings and initially Figs. I to 3, a temperature sensor device I comprises a sensor head 2 connected to the ratiometric interrogation system 10 via connection fibres 4. The connection fibres may be extensions of the fibres in the sensor head.
The sensor head 2 comprises a buffer stripped (or buffer absent) bent fibre 3 with high bend loss. The bent fibre comprises an absorption layer 13. The absorption layer 13 is selected to absorb the whispering gallery modes which are inherent in a bent single mode fibre. The absorption layer 13 avoids reflection back from the cladding-air boundary. By negating the reflections, the ability to perform temperature measurements is achieved.
An input signal 5 is provided to the device I at the interrogation system 10, for example from a laser source (not shown). The signal 5 is split into two, suitably equal, signals by a splitter 6. A first one of the split signals namely a signal 5A is transmittable via the connection fibres 4 through the sensor head and the second split signal, namely reference signal 5B is transmittable through a reference arm 8.
The device further includes detector means 7 having detectors 7-1,7-2 for detecting the optical power (A) of the signal transmitted through the sensor head 2 and for detecting the optical power (B) of the reference signal transmitted through the reference arm 8. By measunng the change in the ratio of detected power between signals from the sensing and reference arms (NB), a change in temperature can be detected. It will be appreciated that calibration may be required before actual measurement. The use of a ratiometric interrogation system renders the measurement system independent of input signal power fluctuations. However, it will be appreciated that the present invention can provide advantages even where a ratiometric system is not employed.
Referring to Fig 3, the fibre 3 of the sensor head 2 is described in more detail.
The fibre 3 has a core 14 and cladding 15. The bend radius of the fibre 3 is suitably maintained using a suitable support or other means. An absorption layer 13 coats the surface of the cladding 15.
Conventionally, optic fibres are covered by a buffer layer, typically of polymer or some other like material. The present application employs fibres in the sensor head which are supplied without a buffer layer or which have been stripped of their buffer layer.
In either case, the absorption layer 13 is applied to the outside surface of the fibre cladding 15. The absorption layer 13 adheres to the fibre 3 and absorbs light in the near-infra red region, around, circa 1550 nm. The absorption layer 13 may, for example, be a black pigment ink. The absorption layer 13 absorbs whispering gallery modes and reduces reflections back from the air-cladding boundary, making the sensor device suitable for precise temperature measurements. The absorption layer 13 is configured to absorb the reflected light at the cladding-air interface of the bend fibre loop. The absorption layer 13 is comprised of a material configured to absorb light at the wavelength of operation.
The sensor device I is thus configured so that temperature change at the sensor head results in an alteration of the bend loss as a result of the thermally induced variations in the refractive index of the core and the dadding. Both the core and the cladding are suitably made of silica material and thus have positive thermo-optic coefficients. The effective change in refractive index of the core and the cladding is linear in nature resulting in a linear variation of bend loss with temperature. The fibre and loop may be selected to provide a high bend loss. The use of a high bend loss fibre provides improved temperature resolution.
The sensor device I thus displays improved linearity characteristic with temperature at a fixed wavelength and bend radius compared to prior art devices.
The temperature sensitivity of the sensor is dependent on the bend loss of the fibre 3. For example, the use of a high bend-loss sensitive fibre (such as I O6OXP single mode fibre, which has a high bend loss in the wavelength region 1550 nm) with a small bend radius increases the temperature resolution. It will be appreciated that there is a trade-off between sensitMty and fibre stress. Higher sensitivity can be achieved by using a smaller bend radius, but this would place greater stress on the fibre and increase the risk of stress-related fibre fracture.
Temperature sensitivity also depends on the operating wavelength, for example for a bend radius of 12.5 mm the sensitivity increases from 0.0078 dB/°C at 1500 nm to 0.0138 dBI°C at 1570 nm, with a value of 0.012 dBI°C at 1550 nm.
Exemplary steps in setting-up and fabricating a device I as described above include the following: 1. Select an appropriate length (100 cm) of a high bend loss fibre (eg.
IO6OXP). As an example the IO6OXP fibre has a fibre core diameter of 5.3 pm and the cladding diameter of 125 pm.
2. Strip the buffer coating of the fibre. The buffer coating may be stripped, for example, for a length of 78.5 mm at the middle of the fibre, which allows a maximum stripped fibre bend diameter of 25 mm, using a fibre stripper.
3. Clean the stripped portion of the fibre. For example, Isopropyl alcohol may be used to clean the fibre. Apply an absorbing layer such as a suitable black pigment ink to the stripped portion.
4. The fibre is then bent using a suitable support means. Thus for example, one end of the fibre may be inserted into a plastic tube, in this exemplary case, of 2 mm length and bend the fibre to a single loop of 360°. The fibre is passed after bend back through the plastic tube again. The unbuffered portion of the fibre now forms a loop with an example bend diameter of 25 mm as per Figure 2. The loop diameter may be precisely set depending on the fibre specifications and the temperature sensitivity required. Additionally the fibre may be fixed in the tube using a suitable adhesive.
5. The ends of the fibre may be spliced to connectorised fibre pigtails (connection fibres 4) for aftachment to the ratiometnc measurement system. The ends may be spliced using a fusion splicer.
Exemplary steps of setup of the sensor measurement device I include the following: Using a laser source to supply an input signal of known wavelength (for
example, 1550 nm)
Connection fibres may be employed to connect the laser to a 50:50 optical fibre splitter. The splitter divides the input signal into two signals, one signal is provided for the connection to the sensor head and the other signal serves as a reference.
The output of the sensor head is transmitted to the detector 7-1 and the reference arm to detector 7-2 via connecting fibres.
The ratio of the two measured powers gives the temperature information using a suitable system calibration.
Experimental results confirming the efficacy of the devices and methods presented above will now be described.
Examplel
The device was calibrated for a temperature range from 0 °C to 75 °C. The ratio response was measured as a function of temperature as shown in Fig. 4, for an operating wavelength of 1550 nm. From the graph, it is shown that the average slope of the system is 0.012 dBI°C which may be increased by using a smaller bend radius fiber loop or operating at a higher wavelength.
Referring to Figure 5 the measured ratio variation for a I °C step temperature change from 30°C to 25°C is shown.
In arriving at the above system, some of the features of the components which have been considered include the dimensions of fibre bend-loss loops, the coating techniques for coating the stripped fibre, etched fibre bend-loss loops, and the influence of fibre type and temperature sensitivity. In configuring the system according to the application other important factors indude the impact of source noise and calibration. It will be appreciated, that depending on the end application of the temperature sensor, that the skilled person in the art will use appropriate judgement In adjusting these parameters to achieve desired measurement criteria.
The application thus provides an all-fibre temperature sensor system using a single mode bend fibre loop, with high bend loss, which is useable in the ratiometric scheme.
The sensor device described herein may be employed with a distnbuted temperature sensing system. In such case, a suitable interrogation system may be employed.
The sensor device presented herein advantageously has a linear characteristic with temperature at a fixed wavelength and bend radius. The temperature sensitive sensor headTM is a buffer stripped bent fibre with high bend loss and with an absorption coating which absorbs whispering gallery modes, inherent in a bent single mode fibre, to avoid any reflection back from the boundary which would otherwise make the sensor unsuitable for precise temperature measurements. The sensor advantageously provides temperature measurements of improved precision.
The sensor presented herein furthermore has a higher temperature resolution than other fibre optic sensors and also benefits from simplicity and is furthermore a compact device.
The bend fibre loop fabrication technique according to the invention allows use of a macrobend singlemode fibre without a buffer coating. The removal of the buffer coating eliminates the propagation of radiation mode in the buffer and avoids the temperature induced relative phase change of the guided mode and the radiation mode.
The devices presented herein have the further advantage that where a ratiometnc scheme is employed the system is substantially independent of source power variation and the sensor more stable and accurate. By measuring the power ratio of the signal from the bend fibre loop, which is a function of temperature, and the reference signal, temperature can be measured, assuming the system is calibrated.
The device described herein has the further advantage that it is a relatively simple device which does not require many separate components this is in particular as the temperature sensitive portion is the bend fibre itself. Thus the temperature sensitive portion is self contained which is advantageous from the point of view of manufacture, maintenance and operation.
The device described herein is based on a single mode fibre, and hence can be used in different multiplexing topologies (like time division multiplexing and spatial division multiplexing) and can thus be used for distributed sensing of temperature.
Given the simplicity of fabrication of the sensor head and the use of single mode fibre, the possibility exists to fabricate a disposable fibre sensor for use in harsh environments or to measure the internal temperature of composites or other cured materials during manufacturing, where the sensor is expected to be destroyed after a period of time or is unrecoverable.
The system can operate at a single fixed wavelength and can use standard lasers designed for telecommunication systems.
The words comprises/comprising when used in this specification are to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
Claims (19)
- CLAIMS1. A temperature sensor device comprising a single mode bent fibre, the fibre being coated with an absorption layer.
- 2. A temperature sensor device according to claim 1, wherein the fibre is stripped of its buffer layer along the length of the fibre loop, which constitutes the sensor head.
- 3. A temperature sensor device according to claim I or claim 2, wherein the bend radius of the fibre is fixed such that the device provides an output characteristic substantially linear with temperature at an operating wavelength.
- 4. A sensor device as claimed in any preceding claim 1, wherein the fibre is selected to have a high bend loss.
- 5. A sensor device as claimed in any preceding claim, wherein the fibre having a core and a cladding and wherein the absorption layer is adhered to the outer surface of the cladding.
- 6. A sensor device as claimed in any preceding claim, wherein the absorption layer is configured to absorb the reflected light at the cladding-air interface of the bend fibre loop.
- 7. A sensor device as claimed in any preceding claim wherein the absorption layer comprised of a material configured to absorb light at the wavelength of operation of a light source of the sensor device.
- 8. A sensor device as claimed in any preceding claim wherein the sensor head is connected to a ratiometric interrogation system, comprising a splitter for splitting an input light signal into a first (sensor) signal transmittable via the sensor head to a sensor signal detector and a second (reference) signal transmittable via a reference arm to a reference signal detector.
- 9. A sensor device as claimed in claim 6 wherein a change in temperature is measured by measuring the change in ratio A/B of the optical power A of the signal transmitted via the sensor head and the optical power B of the reference signal.
- 10. A sensor device as claimed in any preceding claim further comprising a light source, wherein the operating wavelength of the light source may be varied to vary temperature sensitivity of the device.
- 11. A sensor device as claimed in any preceding claim wherein the bend of the fibre is adjustable to vary the temperature sensitivity of the device.
- 12. A sensor device as claimed in any preceding claim wherein the bend radius of the fibre may be varied to provide varied temperature resolution.
- 13. A sensor device as hereinbefore described with reference to the drawings.
- 14. A method of manufacturing a temperature sensor device comprising the step of stripping the fibre of its buffer layer along the length of the fibre loop, which constitutes the sensor head, before applying the absorption layer.
- 15. A method according to claim 14, comprising the step of fixing the bend radius of the fibre.
- 16. A method according to anyone of claims 14 and 15, the absorption layer is adhered to the outer surface of the cladding of the fibre.
- 17. A method of manufacture of a sensor device with reference to and\or as illustrated in the accompanying drawings.
- 18 A sensor head as herebefore described with reference to and\or as illustrated in the accompanying drawings.
- 19. A sensor as herebefore described with reference to and\or as illustrated in the accompanying drawings
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0803583.4A GB2457903B (en) | 2008-02-27 | 2008-02-27 | A temperature sensor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0803583.4A GB2457903B (en) | 2008-02-27 | 2008-02-27 | A temperature sensor device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0803583D0 GB0803583D0 (en) | 2008-04-02 |
| GB2457903A true GB2457903A (en) | 2009-09-02 |
| GB2457903B GB2457903B (en) | 2012-06-20 |
Family
ID=39284656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0803583.4A Expired - Fee Related GB2457903B (en) | 2008-02-27 | 2008-02-27 | A temperature sensor device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2457903B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698048A (en) * | 2013-12-09 | 2014-04-02 | 中国计量学院 | Simple high-sensitivity optical-fiber temperature sensor |
| DE102013106780A1 (en) * | 2013-06-28 | 2014-12-31 | Technische Universität Dresden | Arrangement and method for recording and transmitting measured values by means of optical sensors |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4472628A (en) * | 1981-06-29 | 1984-09-18 | General Electric Company | Fiber optics transducers for sensing parameter magnitude |
| US5258614A (en) * | 1991-05-13 | 1993-11-02 | The Babcock & Wilcox Company | Optical fiber loop temperature sensor |
| US5302025A (en) * | 1982-08-06 | 1994-04-12 | Kleinerman Marcos Y | Optical systems for sensing temperature and other physical parameters |
| DE19620168A1 (en) * | 1995-01-24 | 1997-12-11 | Michael Dr Ing Eckerle | Process to fabricate temperature sensor head hot melt fuses bent optic fibre cables |
| CN1616935A (en) * | 2003-11-10 | 2005-05-18 | 张立国 | Full optical fiber temperature sensor |
| WO2005050274A2 (en) * | 2003-09-30 | 2005-06-02 | Corning Incorporated | Fiber-optic sensor probe for sensing and imaging |
| US20060204164A1 (en) * | 2005-03-08 | 2006-09-14 | Gennadii Ivtsenkov | Low cost fiber-optic gage and associated multi-channel all-optical data collecting system |
| US20070145251A1 (en) * | 2005-12-28 | 2007-06-28 | Hitachi Cable, Ltd. | Optical sensor, optical temperature-measuring device and measuring method using the optical sensor |
-
2008
- 2008-02-27 GB GB0803583.4A patent/GB2457903B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4472628A (en) * | 1981-06-29 | 1984-09-18 | General Electric Company | Fiber optics transducers for sensing parameter magnitude |
| US5302025A (en) * | 1982-08-06 | 1994-04-12 | Kleinerman Marcos Y | Optical systems for sensing temperature and other physical parameters |
| US5258614A (en) * | 1991-05-13 | 1993-11-02 | The Babcock & Wilcox Company | Optical fiber loop temperature sensor |
| DE19620168A1 (en) * | 1995-01-24 | 1997-12-11 | Michael Dr Ing Eckerle | Process to fabricate temperature sensor head hot melt fuses bent optic fibre cables |
| WO2005050274A2 (en) * | 2003-09-30 | 2005-06-02 | Corning Incorporated | Fiber-optic sensor probe for sensing and imaging |
| CN1616935A (en) * | 2003-11-10 | 2005-05-18 | 张立国 | Full optical fiber temperature sensor |
| US20060204164A1 (en) * | 2005-03-08 | 2006-09-14 | Gennadii Ivtsenkov | Low cost fiber-optic gage and associated multi-channel all-optical data collecting system |
| US20070145251A1 (en) * | 2005-12-28 | 2007-06-28 | Hitachi Cable, Ltd. | Optical sensor, optical temperature-measuring device and measuring method using the optical sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013106780A1 (en) * | 2013-06-28 | 2014-12-31 | Technische Universität Dresden | Arrangement and method for recording and transmitting measured values by means of optical sensors |
| CN103698048A (en) * | 2013-12-09 | 2014-04-02 | 中国计量学院 | Simple high-sensitivity optical-fiber temperature sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2457903B (en) | 2012-06-20 |
| GB0803583D0 (en) | 2008-04-02 |
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