CN1341208A - Bragg grating device for measuring mechanical force, utilization of said device and method for operating the same - Google Patents
Bragg grating device for measuring mechanical force, utilization of said device and method for operating the same Download PDFInfo
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- CN1341208A CN1341208A CN00804271A CN00804271A CN1341208A CN 1341208 A CN1341208 A CN 1341208A CN 00804271 A CN00804271 A CN 00804271A CN 00804271 A CN00804271 A CN 00804271A CN 1341208 A CN1341208 A CN 1341208A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 40
- 238000005259 measurement Methods 0.000 claims description 30
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- 230000008602 contraction Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 3
- 239000012858 resilient material Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 53
- 230000001133 acceleration Effects 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 14
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- 230000002277 temperature effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/006—Details of instruments used for thermal compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/093—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by photoelectric pick-up
Abstract
The invention relates to a Bragg grating device for measuring a mechanical force (K, K'), comprising an optical fiber (1) and a Bragg grating (11) formed in said optical fiber, in addition to a force transmitting device (2) that converts the force to be measured into a force (K1, K1') that expands and/or contracts the fiber (1). The device (2) provides higher measuring sensitivity and sensors for measuring other physical variables such as electric tension, temperature, acceleration, vibration, etc. with higher measuring sensitivity.
Description
The present invention relates to a kind of job applications and method that is used for prague grating device He this device of measurement mechanical power.
DE196 48 403 once disclosed a kind of prague grating device that is used for measurement mechanical power.This device has:
-at least one optical fiber is used for light conducting radiation on the direction of propagation,
-be integrated in the Bragg grating within the described fiber, have the distinctive bragg wavelength of grating, and this wavelength is according to stretching, extension and/or the contraction and change of described fiber on the described direction of propagation, and
-one is stretched body, and this stretching, extension body is fixed on two fastening point places on described fiber, and described two fastening point are to arrange mutually with the interval that comprises described grating on the direction of propagation, and described stretching, extension body can stretch on the direction of propagation.
This device be used to measure with the corresponding to direction of propagation of the length direction of described fiber in pressure or pulling force, wherein said stretching, extension body is not to act as the described pressure measured or " amplifier " of pulling force of needing.
The described fiber that comprises Bragg grating for example can utilize resilient spring and apply on the direction of propagation to answer pulling force in advance.
A kind of form of implementation of this device is the scheme with temperature compensation, it has a uncharge additional reference fiber, and should have an integrated reference Bragg grating with reference to fiber, cause the temperature effect of bragg wavelength skew by this with reference to the Bragg grating measurement, and by suitable analysis with its elimination.
Can look into from the US patent No. 5 682 445 and get a kind of prague grating device, it has:
-at least one optical fiber is used for light conducting radiation on the direction of propagation,
-be configured in the Bragg grating within the described fiber, have the distinctive bragg wavelength of grating, and this wavelength is according to stretching, extension and/or the contraction and change of described fiber on the described direction of propagation, and
The lever converter of-one irrotationality rotating shaft, it is fixed on two fastening point places on described fiber, and described two fastening point are to arrange mutually with the interval that comprises described grating on the direction of propagation.
The effect of the lever converter of described irrotationality rotating shaft is, a stress is provided on the direction of propagation fiber and grating between described fastening point.
For this reason, the lever converter of described irrotationality rotating shaft has the part of two longitudinal extensions on the direction of propagation at least, and these two parts all have a front side end, and these front side end link to each other fixed to one anotherly.In described two parts each all has another front side end that is positioned at the described front side end opposite of this part.The described other end of a part is located to be fixedly attached on the described fiber in one of two fastening point, and the described other end of another part then is fixedly attached on the described fiber at another fastening point place.
By changing the length of described two parts of on the direction of propagation between the described front side end, measuring, can in fiber, relatively be created in the stress that works on the direction of propagation.
The present invention based on task be, a kind of prague grating device that is used for measurement mechanical power is provided, for the prague grating device of known type, it can realize wideer application.
This task is realized by the characteristic of claim 1.
According to this solution, the prague grating device that the present invention is used for measurement mechanical power has:
-at least one is by the optical conductor that resilient material is formed, and is used for light conducting radiation on the direction of propagation,
-at least one is configured in Bragg grating in the described conductor, that have bragg wavelength, and stretching, extension and/or the contraction on the direction of propagation changes described bragg wavelength according to described conductor, and
-force transfering device converts the described power that needs to measure to a power that stretches and/or shrink described conductor by it on the described direction of propagation.
Can realize wideer application in the following way, promptly described force transfering device has one and is not equal to 1 conversion ratio between the described power that needs the power of measurement and be converted.
In principle, various gearings all are suitable as force transfering device, such as cogwheel gearing or the like.A kind of preferred and favourable improvement project of apparatus of the present invention is so constructed, make described force transfering device have at least one lever, described lever can be rotated around the turning axle that with respect to described conductor is basic fixed, and this lever also is fixed on the described conductor, has been applied in the described power measured of needing on the described lever.This improvement project structure when realizing is very simple.
In this case, can be by the interval of power between the turning axle of application point on the lever and described lever of selecting to need measurement described, and by selecting at this turning axle and the described lever interval between the fastening point on the conductor to adjust the conversion ratio of force transfering device, this conversion is than coming given with described second at interval the ratio at interval by described first.
If described force transfering device has a lever, wherein fixedly turning axle and described lever at the interval between the fastening point on the conductor greater than described fixedly turning axle and described need the power measured between the application point on the lever at interval, then especially can amplify the caused deflection of power that needs measurement by described, and, if described force transfering device has a lever, wherein turning axle and described lever at the interval between the fastening point on the conductor less than described turning axle and described need the power measured between the application point on the lever at interval, then can amplify power.
This improvement project can have a lever, wherein said turning axle in described conductor and the described power of need measuring between the application point on the lever, and/or has a lever, the wherein said power of need measuring at the application point on the lever between described conductor and turning axle, and/or have a lever, wherein said conductor in described turning axle and the described power that needs to measure between the application point on the lever.
In a kind of preferred implementing form of this improvement project, it is on the point of basic fixed that described conductor is fixed on a turning axle with respect to lever, and described is being that the interval that includes described grating is disposed on the described conductor with a fastening point apart from lever on the direction of propagation of optical radiation.
This form of implementation can be preferably and is advantageously had a kind of carrier, and described lever can be rotated around described turning axle on this carrier, and described conductor is fixed on the described point of fixity.This carrier for example can preferably carry out unitary construction, and especially is made up of single material.Therefore this embodiment is structurally fairly simple, and manufacturing cost is suitable, has avoided complexity and the expensive carrier structure is made up of a plurality of parts, and this is favourable.
Preferably, on the direction of propagation, apply a prestress for described conductor.In by the determined zone of this prestress, this both can realize the stretching, extension of Bragg grating, can realize its contraction again.
In principle, can adopt various transparent elastic material bodies to be used as the optical conductor of light conducting radiation on the direction of propagation.Preferably, described conductor has a kind of optical fiber that is configured with described Bragg grating in it.
In a kind of advantageous modification of apparatus of the present invention, has a kind of force generating apparatus, be used to generate the mechanical force of the need measurement of changing by described force transfering device, it especially can so be constructed, and makes also for example to select or controllably to produce the described power that needs measurement at any time.
In a kind of preferred and favourable expansion of this improvement project, described force generating apparatus has a kind of converting means, be used for being transformed into described power being different from the described physical quantity of the mechanical force of measurement that needs, preferably, described physical quantity is different from mechanical force, according to described converting means, this physical quantity can be temperature, electric field intensity and/or magnetic field intensity, acceleration, vibration or the like for example.
If described physical quantity be electric field intensity or voltage for example, then described converting means can have a kind of piezoelectric material body, and it can extend and/or shrinks according to described field intensity or voltage, wherein utilizes this performance to generate the power of described need measurement.
If described physical quantity is acceleration and/or retarded velocity for example, especially vibrate, then described converting means can have the quality of motion, and effect has acceleration and/or deceleration on it, wherein utilizes the inertia of described quality to produce the described power that needs measurement.
The improvement project of apparatus of the present invention not only has the advantage that can measure the mechanical force that depends on the physical quantity that especially is different from mechanical force, but also has following advantage, be that it can be used as the sensing device of measure physical quantities itself, such as temperature sensor, voltage sensor, acceleration sensor or vibration transducer, or the like.
Device of the present invention can so be worked usually, promptly the optical radiation in the conductor is imported the Bragg grating that is configured within the described conductor, and measure, and with its measuring as the described power that need measure by the bragg wavelength that optical radiation produced of described Bragg grating according to described input.
In order to compensate the effect that depends on temperature, can install a kind of reference light conductor that does not have stretching force and no convergent force, wherein constructed one with reference to Bragg grating, cause that with reference to the Bragg grating measurement described bragg wavelength produces the temperature effect of skew by this, and can eliminate this influence by suitable analysis.Preferably, described reference conductor is identical type with the conductor that is used for ergometry.Equally, described also can be identical with reference to Bragg grating and the Bragg grating that is used for ergometry.
In the following description, elaborate the present invention by accompanying drawing with coming example.
Fig. 1 shows the embodiment of apparatus of the present invention, has wherein amplified deflection,
Fig. 2 shows realization embodiment illustrated in fig. 1,
Fig. 3 shows the embodiment of apparatus of the present invention, has wherein amplified power, and
Fig. 4 shows realization embodiment illustrated in fig. 3.
Above-mentioned accompanying drawing is not schematically, draw in proportion.
In the embodiment shown in the accompanying drawing, with 1 optical conductor that indicates such as by forming such as optical fiber such as glass fibre light wave guides.This fiber 1 conducts the optical radiation P of coupling input on a direction of propagation, the described direction of propagation is with to be parallel to length direction 10 plan, described fiber 1 consistent.
Constructed the Bragg grating 11 with the distinctive bragg wavelengths 1 of grating in described fiber 1, described bragg wavelength is according to the stretching, extension of fiber 1 and/or contraction and change on its length direction 10.
Usually the power of need being measured with 2 force transfering devices that indicate converts 10 power that act on the fiber 1 along its length to, and this power stretches described fiber 1 and/or shrinks on length direction 10.
Described force transfering device 2 has a lever 20, and it can be fixed on again on the other hand on the described fiber 1, and the described masterpiece that needs to measure be used on this lever around turning axle 21 rotations that with respect to fiber 1 are basic fixed on the one hand.
In the accompanying drawings, the direction of described turning axle 21 is aligned to perpendicular to plan, makes described lever 20 to rotate being parallel on the direction of plan.
If lever 20 is applied the power K of a need measurement at application point 23 places that do not overlap with turning axle 21, and this power will make described lever 20 rotate around turning axle 21 with counter-clockwise direction C, so just, can produce a power K1 from point of fixity 32 sensing fastening point 22 at fastening point 22 places, this power makes fiber 1 and grating 11 flexibly stretch on length direction 10.
When alleviating power K, the stretching, extension of fiber 1 and grating 11 just reduces, and to the last reaches the virgin state that does not stretch of fiber 1 and grating 11 under the enough little situation of power K again.
For can also measure make described lever 20 in a clockwise direction c around the power K ' of turning axle 21 rotation, apply a definite prestress B from point of fixity 32 sensing fastening point 22 on length direction 10 described fiber 1, this prestress B reacts on the power K1 ' that described power K ' is produced on fastening point 22.As long as K1 '≤B then can measure this power K '.
In all accompanying drawings, be without loss of generality for the sake of simplicity, the application point 23 of the power that need measure is assumed to be and is arranged on the lever shaft 200, described lever shaft 200 is connected with each other with described turning axle 21 being positioned at fastening point 22 on the fiber 1, lever 20, but also is parallel to corresponding plan and crossing with turning axle 21 perpendicular to ground.
In the embodiment shown in fig. 1, be greater than power K or the interval d2 of K ' between the application point on the lever 20 23 that is positioned at fixing turning axle 21 and needs to measure at the interval d1 between the fastening point on the fiber 1 22 at turning axle 21 and lever 20.
This embodiment is applicable to following situation, wherein from fiber 1 be delivered to the stretching, extension of grating 11 and/or shrink very little so that energy measurement goes out is consequent, the skew of the distinctive bragg wavelengths 1 of grating.
Utilize described lever 20 realize to stretch at fastening point 22 places and/or to shrink, this stretching, extension and/or stretching, extension and/or contraction when shrinking with factor k=d1/d2＞1 greater than no lever 20.
Fig. 2 shows special realization embodiment illustrated in fig. 1.A carrier 3 is arranged in the middle of this realization, and lever 20 can be on this carrier be rotated around fixing turning axle 21, and described fiber 1 is fixed on point of fixity 32 places.
Fiber 1 another point of fixity 34 places on described carrier 3 are so fastened, make the fastening point 22 of lever 20 and described grating 11 be disposed between point of fixity 32 and another point of fixity 34.
This cavity 30 is a hole that forms in the surface portion of described carrier 3 for example.In Fig. 2, this surface portion draws with vertical view, and indicates with 31.Described cavity 30 has formed an aperture 310 of being limited by the inside edge 301 of this surface portion 31 in surface portion 31, and has extended a degree of depth perpendicular to the plan of Fig. 2 from surface portion 31.
Add overstress for the aperture 310 of cavity 30 by fiber 1, this fiber is fixed in the both sides in described aperture 310 and at point of fixity 32 and 34 places such as is on the surface portion 31 on plane.
In described cavity 30, lever 20 has been installed.The plan that lever 20 is basically parallel to Fig. 2 extends, and catches fiber 1 and is fixed on this fiber 1 in fastening point 22 from following then.
As shown in Figure 2, described lever shaft 200 preferably is basically perpendicular to the longitudinal axis 10 of fiber 1, arranges but also can be obliquely with this longitudinal axis.
The turning axle 21 of lever 20 can be the turning axle that lever 20 activities is connected to the active joint 320 on the carrier 3, and like this, described lever 20 just can be rotated around fixing turning axle 21 with respect to carrier 3.
For example activity is connected on the carrier 3 lever 20 by active joint 320, and this active joint is arranged between described carrier 3 and the lever 20, and they are coupled to each other.
This active joint 320 for example can connect by the deformable between lever 20 and carrier 3 to be realized.
In the embodiment shown in Figure 2, this deformable connection 320 is disposed in the edge 301 in aperture 310 and lever 20 between the terminal 201 at this edge 301.Described connection 320 for example has a flexible coupling spindle 321, and this is a rigidity on the direction perpendicular to Fig. 2 plane, and be parallel to described plan and perpendicular to the direction of lever shaft 200 on can be crooked.
This connection 320 has defined a turning axle 21, and this turning axle is with respect to carrier 3 and be not completely fixed with respect to fiber 1 thus, but can be shifted in the limit of certain permission.That is to say that described turning axle 21 is basic fixed.
Different with Fig. 1 is, needing the power K that measures or the application point 23 of K ' in Fig. 2 is between turning axle 21 and fastening point 22, and is between application point 23 and fastening point 22 at the turning axle described in Fig. 1 21.
In realization shown in Figure 2, need the power K or the K ' that measure for example to produce by piezoelectric activity device 4 or other piezoelectric material adult, this piezoelectric activity device is fixedly attached on carrier 3 and the lever 20, and can stretch along effect device axle 400 according to the voltage U that applies, and/or be parallel to Fig. 2 plane and shrink, and it also vertically or obliquely intersects with lever shaft 200 at application point 23 places.Thus, the piezoelectric activity device 4 of tensible and/or contraction applies power K or the K ' that need are measured on described lever 20, and this power is pointed to described application point 23, and can be regarded as being applied to power there.
The described piezoelectric activity device 4 that is fixedly linked with carrier 3 and lever 20 has constituted a force generating apparatus, so that produce the mechanical force K or the K ' of the need measurement of being changed by force transfering device 2.Described piezoelectric activity device 4 itself has also constituted a kind of converting means, so that be transformed into described power K and K ' being different from the described physical quantity (being voltage U herein) of the mechanical force K or the K ' of measurement that needs.
The power that is produced by piezoelectric activity device 4 or other piezoelectric material adult is very big, thisly makes the stretching, extension of body and/or shrinks then very little.Embodiment shown in Fig. 1 and 2 mainly is applicable to the situation of amplifying described stretching, extension and/or contraction, has wherein increased the resolution of described bragg wavelengths 1 widely, and has increased measurement sensitivity thus.Generally speaking, this embodiment relatively is suitable as voltage sensor.
If adopted material bodies a kind of such as that stretch and/or shrink according to temperature or magnetic field intensity for producing the described power of need measuring, rather than the piezoelectric activity device, utilize the embodiment shown in Fig. 1 and 2 can realize the temperature sensor or the Magnetic Sensor of bigger measurement sensitivity so.
Different with the embodiment of Fig. 1 and 2 is, in the embodiment shown in fig. 3, be less than power K and the interval d2 of K ' between the application point on the lever 20 23 that is positioned at described turning axle 21 and needs to measure at the interval d1 between the fastening point on the conductor 1 22 at turning axle 21 and lever 20.
This embodiment is applicable to following situation, wherein be delivered to the stretching, extension on the grating 11 and/or shrink very little by fiber 1, so that energy measurement goes out is consequent, the skew of the distinctive bragg wavelengths 1 of grating, because it is smaller to influence the power K1 or the K1 ' of this stretching, extension and/or contraction.
In this embodiment, utilize the described lever 20 can be at fastening point 22 realizable force K1 of place or K1 ', this power with factor 1/k=d2/d1＞1 greater than the power K or the K ' that need on the point of leverage 23 to measure.
Fig. 4 shows special realization embodiment illustrated in fig. 3.The lever situation in being different from Fig. 2 embodiment, the difference of this realization only is to produce needs the mode of the power K that measures or K ' different.In addition, realization shown in Figure 4 is to construct in the mode identical with the embodiment of Fig. 2, and corresponding part is to represent with identical reference symbol.
Different with the embodiment of Fig. 1,2 embodiment and Fig. 3 is, in realization shown in Figure 4, the fastening point 22 of lever 20 is disposed between the turning axle 21 and the described application point 23 that needs the power K that measures or K ' of lever 20.
In this case, described power K that need measure or K ' are a kind of inertial force for example, and this inertial force is applied to the inertial mass M of lever 20 on the lever 20 when lever 20 accelerated motions.In this case, the application point 23 of described power K or K ' overlaps with the center of gravity of mass M.
In this case, on carrier 3, can constitute force generating apparatus, so that generate mechanical force K, the K ' of the need measurement of changing by described force transfering device 2 around turning axle 21 levers 20 that rotate, that quality is M.Lever 20 with turning axle 21 and mass M itself has constituted a kind of converting means, so that be transformed into described power K and K ' being different from the described physical quantity (being acceleration herein) of the mechanical force K or the K ' of measurement that needs.
When acceleration hour, even if also only can produce minimum inertial force under the bigger situation of mass M, this power can not or can only less stretch described Bragg grating 11 on length direction 10.Utilize realization shown in Figure 4, can convert this little inertial force K or K ' to be enough to rotate described grating 11 big inertial force K1 or K1 ', wherein simultaneously can obtain enough deflection.
Utilize the embodiment shown in Fig. 3 and 4, can realize the acceleration sensor and/or the vibration transducer of bigger measurement sensitivity.
Each device shown in the accompanying drawing can so carry out work usually, makes optical radiation P coupling be input in the fiber 1, and is led toward Bragg grating 11 in described fiber 1, measures the bragg wavelengths 1 by 11 reflections of this grating then.The wavelength X 1 of described measurement or its skew are to need measuring of the power of measurement or physical quantity.
Figure 2 illustrates with reference to fiber 5, it has the reference Bragg grating 51 that is used to compensate the effect that depends on temperature.This is parallel to fiber 1 with reference to fiber 5 when arranging, and unstressed cavity 30 and the lever 20 of extending across, and, this so is fixed on the carrier 3 with reference to the point 52 and 54 places of fiber at surface portion 31, makes the mechanical stress that stretching, extension that carrier 3 depends on temperature can generation can not measured in reference fiber 5.Describedly can take same fiber with reference to fiber 5 and fiber 1.Equally, identical with reference to Bragg grating 51 with the structure of Bragg grating 11.
Claims (15)
1. be used for the prague grating device of measurement mechanical power (K, K '), have:
-at least one optical conductor of being made up of resilient material (1) is used for (10) upward light conducting radiation (P) in the direction of propagation,
-at least one is configured in Bragg grating (11) in the described conductor (1), that have bragg wavelength (λ 1), and stretching, extension and/or the contraction on the direction of propagation (10) changes described bragg wavelength according to described conductor (1), and
-force transfering device (2) converts the described power (K, K ') that needs to measure to a power (K1, K1 ') that stretches and/or shrink described conductor (1) on the described direction of propagation (10) by it.
2. device as claimed in claim 1 or 2, wherein said force transfering device (2) has at least one lever,
-described lever can be around being rotated for the turning axle of basic fixed (21) with respect to described conductor (1),
-described lever is fixed on the described conductor (1), and
-on described lever, acted on the described power of need measuring (K, K ').
3. device as claimed in claim 2, wherein said force transfering device (2) has a lever (20), and, be positioned at described turning axle (21) and described lever (20) at the interval (d1) between the fastening point (22) on the described conductor (1) greater than being positioned at described turning axle (21) and the described interval (d2) of power (K, K ') between the application point (23) on the described lever (20) of need measuring.
4. as claim 2 or 3 described devices, wherein said force transfering device (2) has a lever (20), and, be positioned at described turning axle (21) and described lever (20) at the interval (d1) between the fastening point (22) on the described conductor (1) less than being positioned at described turning axle (d2) and the described interval (d2) of power (K, K ') between the application point (23) on the described lever (20) of need measuring.
5. as the described device of one of claim 2～4, wherein said conductor (1) is fixed on a turning axle with respect to lever (20) (21) on the point (23) of basic fixed, and described going up in the direction of propagation (10) is disposed on the described conductor (1) for the interval (a) that includes described grating (11) with a fastening point apart from lever (20).
6. device as claimed in claim 5 has a kind of carrier (3), and described lever (20) can be rotated around described turning axle (21) on this carrier, and described conductor (1) is installed on the described point of fixity (23).
7. device as claimed in claim 6, wherein said carrier (3) is integrally constructed.
8. the described device of one of claim as described above, wherein said conductor (1) has a prestress (B) on the direction of propagation (10).
9. the described device of one of claim as described above, wherein said conductor (1) has a kind of optical fiber.
10. the described device of one of claim as described above has a kind of force generating apparatus (3,20,4; 3,20,21, M), be used for generating the mechanical force (K, K ') of the need measurement of changing by described force transfering device (2).
11. device as claimed in claim 10, wherein said force generating apparatus (3,20,4; 3,20,21, M) have a kind of converting means (4; 20,21, M), be used for being transformed into described power (K, K ') being different from the described physical quantity (U) of the mechanical force (K, K ') of measurement that needs.
12. device as claimed in claim 11, wherein said converting means (4) has a kind of piezoelectric material body.
13. as claim 11 or 12 described devices, and wherein said converting means (20,21, M) have the quality (M) of motion.
14. one of application rights requirement 10～13 described device comes measure physical quantities (U).
15. the method for work of the described device of one of claim 1～14 has step:
-optical radiation (P) in the conductor (1) is imported the Bragg grating (11) that is configured within the described conductor (1), and
-measure the bragg wavelength (λ 1) that is produced according to the optical radiation (P) of described input by described Bragg grating (11), and it is needed measuring of power (K, the K ') that measure as described.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19907932 | 1999-02-24 | ||
| DE19907932.3 | 1999-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1341208A true CN1341208A (en) | 2002-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00804271A Pending CN1341208A (en) | 1999-02-24 | 2000-02-02 | Bragg grating device for measuring mechanical force, utilization of said device and method for operating the same |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1157263A1 (en) |
| JP (1) | JP2002538426A (en) |
| KR (1) | KR20010108257A (en) |
| CN (1) | CN1341208A (en) |
| DE (1) | DE19939583A1 (en) |
| PL (1) | PL350130A1 (en) |
| WO (1) | WO2000050864A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523754C (en) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | Optical fibre pressure intensity sensor based on beam of constant strength |
| CN106442791A (en) * | 2016-10-14 | 2017-02-22 | 广西壮族自治区农业科学院甘蔗研究所（中国农业科学院甘蔗研究中心） | HPLC detection method of content of jasmonic acid in sugarcane leaf |
| CN107907252A (en) * | 2017-10-23 | 2018-04-13 | 沈阳建筑大学 | A kind of lever fiber bragg grating pressure sensor |
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| US6575033B1 (en) | 1999-10-01 | 2003-06-10 | Weatherford/Lamb, Inc. | Highly sensitive accelerometer |
| US7243543B2 (en) | 1999-10-01 | 2007-07-17 | Optoplan As | Highly sensitive accelerometer |
| EP1358488B1 (en) * | 2001-02-06 | 2010-01-06 | Optoplan AS | Highly sensitive cross axis accelerometer |
| JP4786808B2 (en) * | 2001-03-02 | 2011-10-05 | 株式会社東横エルメス | Optical fiber strain detector |
| DE10223870A1 (en) * | 2002-05-29 | 2003-12-11 | Daimler Chrysler Ag | Gas shuttle valve operating device for controlling a shuttle valve in an internal combustion engine has an electromagnetic actuator with a flexible valve spring for altering shape |
| JP5162275B2 (en) * | 2008-02-28 | 2013-03-13 | アンリツ株式会社 | Vibration detector |
| JP5313608B2 (en) * | 2008-09-26 | 2013-10-09 | 長野計器株式会社 | Optical fiber sensor |
| CN101840615B (en) * | 2010-04-09 | 2012-01-11 | 武汉理工大学 | Self-adaptive warning system for intelligently addressing circumferential intrusions of fiber Bragging grating |
| DE102013101432B4 (en) * | 2013-02-13 | 2019-07-04 | fos4X GmbH | Fiber optic accelerometer with lever |
| DE102014117914B4 (en) | 2014-12-04 | 2021-11-11 | fos4X GmbH | Method for detecting a flutter of a rotor blade of a wind turbine |
| AU2015394911A1 (en) | 2015-05-08 | 2017-11-30 | Fugro Technology B.V. | Optical sensor device, sensor apparatus and cable |
| DE102015217430A1 (en) * | 2015-09-11 | 2017-03-16 | Siemens Aktiengesellschaft | Fiber optic acceleration sensor |
| CN106644203B (en) * | 2016-11-24 | 2019-02-19 | 中国科学院武汉岩土力学研究所 | A kind of stress sensitive element based on three-dimensional fiber crustal stress sensor |
| DE102016125612B4 (en) * | 2016-12-23 | 2022-05-05 | fos4X GmbH | Fiber optic accelerometer with lever |
| NL2024979B1 (en) * | 2020-02-24 | 2021-10-14 | Laser Inst Of Shandong Academy Of Science | Optical fiber grating acceleration sensor |
| GB2592274A (en) * | 2020-02-24 | 2021-08-25 | Laser Inst Of Shandong Academy Of Science | Optical fiber grating acceleration sensor |
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|---|---|---|---|---|
| DE3931021A1 (en) * | 1989-09-16 | 1991-04-18 | Hommelwerke Gmbh | POWER KNIFE |
| DE4124685A1 (en) * | 1991-07-25 | 1992-11-12 | Schenck Ag Carl | Optical measurement of force on elastic spring element - involves opto-electronic detection of displacement of point of impact of beam emitted from cantilevered light guide |
| US5502782A (en) * | 1995-01-09 | 1996-03-26 | Optelecom, Inc. | Focused acoustic wave fiber optic reflection modulator |
| US5841131A (en) * | 1997-07-07 | 1998-11-24 | Schlumberger Technology Corporation | Fiber optic pressure transducers and pressure sensing system incorporating same |
| DE19648403C1 (en) * | 1996-11-22 | 1998-04-02 | Thomas Dr Ing Nagel | Direct pressure and-or tensional forces detector |
| US5892860A (en) * | 1997-01-21 | 1999-04-06 | Cidra Corporation | Multi-parameter fiber optic sensor for use in harsh environments |
-
1999
- 1999-08-20 DE DE19939583A patent/DE19939583A1/en not_active Ceased
-
2000
- 2000-02-02 WO PCT/DE2000/000317 patent/WO2000050864A1/en not_active Application Discontinuation
- 2000-02-02 EP EP00912340A patent/EP1157263A1/en not_active Withdrawn
- 2000-02-02 PL PL00350130A patent/PL350130A1/en unknown
- 2000-02-02 JP JP2000601412A patent/JP2002538426A/en active Pending
- 2000-02-02 KR KR1020017010861A patent/KR20010108257A/en not_active Application Discontinuation
- 2000-02-02 CN CN00804271A patent/CN1341208A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523754C (en) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | Optical fibre pressure intensity sensor based on beam of constant strength |
| CN106442791A (en) * | 2016-10-14 | 2017-02-22 | 广西壮族自治区农业科学院甘蔗研究所（中国农业科学院甘蔗研究中心） | HPLC detection method of content of jasmonic acid in sugarcane leaf |
| CN107907252A (en) * | 2017-10-23 | 2018-04-13 | 沈阳建筑大学 | A kind of lever fiber bragg grating pressure sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1157263A1 (en) | 2001-11-28 |
| KR20010108257A (en) | 2001-12-07 |
| JP2002538426A (en) | 2002-11-12 |
| PL350130A1 (en) | 2002-11-04 |
| DE19939583A1 (en) | 2000-09-14 |
| WO2000050864A1 (en) | 2000-08-31 |
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