WO2000050864A1 - Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung - Google Patents
Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung Download PDFInfo
- Publication number
- WO2000050864A1 WO2000050864A1 PCT/DE2000/000317 DE0000317W WO0050864A1 WO 2000050864 A1 WO2000050864 A1 WO 2000050864A1 DE 0000317 W DE0000317 W DE 0000317W WO 0050864 A1 WO0050864 A1 WO 0050864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- force
- lever
- conductor
- axis
- rotation
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 4
- 239000013307 optical fiber Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 21
- 230000008602 contraction Effects 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 52
- 230000001133 acceleration Effects 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Definitions
- Bragg grating device for measuring a mechanical force and application and method for operating the device
- the invention relates to a Bragg grating device for measuring a mechanical force and to an application and a method for operating the device.
- a Bragg grating device for measuring a mechanical force is known from DE 196 48 403. This device has:
- At least one optical fiber for guiding an optical radiation in a direction of propagation, an optical Bragg grating integrated in the fiber with a grating-specific Bragg wavelength which varies depending on an elongation and / or contraction of the fiber in the direction of propagation, and
- an expansion body which is fastened to the fiber at two fastening points which are arranged at a distance from one another in the direction of propagation and contain the grid and which can stretch in the direction of propagation.
- This device serves for the detection of compressive and / or tensile forces directed in the direction of propagation corresponding to a longitudinal direction of the fiber, the expansion body not acting as an "amplifier" for the pressure or tensile to be measured.
- the fiber containing the Bragg grating can, for example, be biased in tension in the direction of propagation by an elastic spring.
- One embodiment of this device is a temperature-compensated variant which has an additional unloaded reference fiber with an integrated reference Bragg grating, by means of which temperature influences, which differ exercise of the Bragg wavelength can be detected and eliminated by a suitable evaluation.
- a Bragg grating device can be found in US Pat. No. 5,682,445, which has:
- At least one optical fiber for guiding optical radiation in a direction of propagation
- an optical Bragg grating formed in the fiber with a grating-specific Bragg wavelength which varies depending on an expansion and / or contraction of the fiber in the direction of propagation
- a lever transmission which is free of rotation axes and which is fastened to the fiber at two fastening points which are arranged at a distance from one another in the direction of propagation and which contain the grating.
- the lever transmission which is free of rotation axes, serves to impart tension in the direction of propagation to the fiber and the grating between the fastening points.
- the lever transmission free of rotation axes has at least two parts elongated in the direction of propagation, each with an end at the end, these ends being firmly connected to one another.
- Each of these two parts each has a different end on the opposite side to one end of this part.
- the other end of a part is firmly connected to the fiber at one of the two attachment points and the other end of the other part is firmly connected to the fiber at the other attachment point.
- a tension in the fiber acting in the direction of propagation can be generated by changing the lengths of the two parts measured between the front ends in the direction of propagation relative to one another.
- the object of the invention is to provide a Bragg grating device for measuring a mechanical force. len, which enables a wider application compared to the known Bragg grating device of this type.
- the Bragg grating device for measuring a mechanical force has:
- At least one optical conductor made of elastic material for guiding optical radiation in a direction of propagation
- a force transmission device which converts the force to be measured into the conductor implements stretching and / or contracting force in the direction of propagation.
- a broader application can be obtained in particular in that the force transmission device has a conversion ratio different from one between the force to be measured and the force applied.
- any type of transmission for example a gear transmission
- the power transmission device is suitable as the power transmission device.
- a preferred and advantageous embodiment of the device according to the invention is designed such that the force transmission device has at least one lever which is rotatable about an axis of rotation which is essentially fixed relative to the conductor, which is fastened to the conductor and on which the force to be measured acts.
- This configuration can be implemented in a structurally particularly simple manner.
- an implementation ratio of the force transmission device can be selected by choosing a distance between a point of application of the force to be measured on the lever and the axis of rotation of the lever and one between this axis of rotation. se and the attachment point of the lever on the conductor given distance and is given by the ratio of the first distance to the second distance.
- the force transmission device has a lever in which the distance between the fixed axis of rotation and an attachment point of the lever on the conductor is greater than the distance between the axis of rotation and an application point of the measuring force on the lever, and an amplification of forces if the force transmission device has a lever in which the distance between the axis of rotation and the attachment point of the lever to the conductor is smaller than the distance between the axis of rotation and the point of application of the force to be measured on the lever .
- the embodiment can have a lever in which the axis of rotation is between the conductor and the point of application of the force to be measured on the lever, and / or a lever in which the point of application of the force to be measured is located on the lever between the conductor and the axis of rotation , and / or a lever in which the conductor is located between the axis of rotation and the point of application of the force to be measured on the lever.
- the conductor is fixed at a point which is essentially fixed relative to the axis of rotation of the lever and which is arranged in the direction of propagation of the radiation at a distance from the fastening point of the lever on the conductor containing the grating.
- This embodiment preferably and advantageously has a carrier body on which the lever is pivoted about the axis of rotation and the conductor is fixed at the fixed point.
- the carrier body can advantageously be formed in one piece and in particular consist of a single material. As a result, the embodiment can advantageously be structurally simple and inexpensive to manufacture and a complex and expensive support structure made of several parts is avoided.
- the conductor is biased in the direction of propagation. This allows both the stretching and contraction of the Bragg grating in a region determined by the prestress.
- any body made of transparent elastic material can be used as the optical conductor, which guides optical radiation in a direction of propagation.
- the conductor preferably has an optical fiber in which the Bragg grating is formed.
- An advantageous further development of the device according to the invention has a force generating device for generating the mechanical force to be measured to be converted by the force transmission device, which can in particular be designed in such a way that the force to be measured is generated on the spot and, for example, selectively or in a controlled manner.
- the force generating device has a converter device for converting a physical variable that is different from the mechanical force to be measured into this force, the physical variable preferably being different from a mechanical force and, depending on the converter device, for example the temperature , an electrical and / or magnetic field strength, an acceleration, vibration, etc. can be.
- the transducer device can have a body made of piezoelectric material that stretches depending on the field strength or voltage and / or contracting, this behavior being used to generate the force to be measured.
- the converter device can have a movable mass on which the acceleration and / or deceleration acts, the inertial behavior of the mass being used to generate the force to be measured.
- the development of the device according to the invention not only has the advantage of measuring a mechanical force that depends on a physical variable that is different, in particular, from a mechanical force, but also has the advantage that it can be used as a sensor device for measuring the physical variable itself, for example as a temperature -, electrical voltage, acceleration or vibration sensor.
- the device according to the invention is generally operated in such a way that optical radiation is guided in the conductor to a Bragg grating formed in the conductor and a Bragg wavelength generated by the Bragg grating on the basis of the supplied optical radiation is measured as a measure of the force to be measured.
- an optical reference conductor free of expansion and contraction forces in which a reference Bragg grating is formed, by means of which temperature influences which cause a shift in the Bragg wavelength can be detected and eliminated by a suitable evaluation.
- the reference conductor and the conductor used for force measurement are preferably of the same type. The same applies to the reference Bragg grating and the Bragg grating used for force measurement.
- FIG. 1 shows an exemplary embodiment of the device according to the invention, amplified in the event of deflections
- FIG. 2 shows a realization of the example according to FIG. 1,
- FIG. 3 shows an embodiment of the device according to the invention, in which forces are increased
- FIG. 4 shows a realization of the example according to FIG. 3.
- the optical conductor designated 1 consists, for example, of an optical fiber, e.g. a fiber optic fiber.
- the fiber 1 conducts injected optical radiation P in a direction of propagation which corresponds to the longitudinal direction 10 of the fiber 1 which is parallel to the plane of the drawing.
- An optical Bragg grating 11 is formed in the fiber 1 with a grating-specific Bragg wavelength ⁇ 1, which varies depending on an elongation and / or contraction of the fiber 1 in its longitudinal direction 10.
- a force transmission device converts the force to be measured into a force acting on the fiber 1 in its longitudinal direction 10, which stretches and / or contracts the fiber 1 in the longitudinal direction 10.
- the force transmission device 2 has a lever 20 which on the one hand can be rotated about an axis of rotation 21 which is essentially fixed relative to the fiber 1, which on the other hand is attached to the fiber 1 and on which the force to be measured acts.
- the axis of rotation 21 is oriented in the direction perpendicular to the plane of the drawing, so that the lever 20 rotates in the direction parallel to the plane of the drawing.
- the lever 20 is attached to the fiber 1 at an attachment point 22.
- the fiber 1 itself is fixed at a point 32 which is fixed relative to the axis of rotation 21 of the lever 20 and which is located at a distance a from the attachment point 22 of the lever 20 on the fiber 1 measured in the longitudinal direction 10.
- the grid 11 is contained at a distance a.
- a force K ⁇ can also be measured, which causes the lever 20 to rotate about the axis of rotation 21 in the clockwise direction c, the fiber 1 is pretensioned in the longitudinal direction 10 with a specific pretensioning force B directed from the fixed point 32 to the fastening point 22, which the this force K ⁇ counteracts at the fixing point 22 the generated force Kl ⁇ .
- Such forces K can be measured as long as Kl x ⁇ B.
- the point of application 23 of the force to be measured is in all figures for the sake of simplicity and without restriction of generality than on a point connecting the attachment point 22 of the lever 20 to the fiber 1 and the axis of rotation 21
- Lever axis 200 is assumed arranged, which runs parallel to the respective plane of the drawing and intersects the axis of rotation 21 vertically.
- the distance d1 between the axis of rotation 21 and the attachment point 22 of the lever 20 on the fiber 1 is greater than the distance d2 between the fixed axis of rotation 21 and the point of application 23 of the force K or K ⁇ to be measured on the lever 20 .
- This example is suitable for the cases in which the expansions and / or contractions transmitted from the fiber 1 to the grating 11 are too small to measure the resulting shifts in the grating-specific Bragg wavelength ⁇ l.
- FIG. 2 shows a special implementation of the example according to FIG. 1.
- a carrier body 3 on which the lever 20 is pivoted about the fixed axis of rotation 21 and the fiber 1 is fixed at the fixed point 32.
- the fiber 1 is fastened to the support body 3 at a further fixed point 34 such that the fastening point 22 of the lever 20 and the grating 11 are arranged between the one fixed point 32 and the further fixed point 34.
- the fiber 1 is biased between the two fixed points 32 and 34 with the bias B.
- the carrier body 3 is formed in one piece and consists, for example, of quartz glass or another glass. It preferably and advantageously has a cavity 30.
- the cavity 30 is, for example, a recess formed in a surface section of the carrier body 3. This surface section is shown in plan view in FIG. 2 and is designated 31.
- the cavity 30 forms an opening 310 in the surface section 31 which is delimited by an inner edge 301 of the surface section 31 and extends vertically from the surface section 31 to the drawing plane of FIG. 2.
- the opening 310 of the cavity 30 is spanned by the fiber 1, which is fixed on both sides of the opening 310 at the fixed points 32 and 34 on the, for example, flat surface section 31.
- the lever 20 is accommodated in the cavity 30.
- the lever 20 extends essentially parallel to the plane of the drawing in FIG. 2, engages under the fiber 1 and is fixed to the fiber 1 at the attachment point 22.
- the lever axis 200 preferably runs and, as shown in FIG. 2, essentially perpendicular to the longitudinal axis 10 of the fiber 1, but it can also be arranged obliquely to the longitudinal axis.
- the axis of rotation 21 of the lever 20 can be the axis of rotation of a swivel joint 320, which links the lever 20 to the carrier body 3, so that the lever 20 can be rotated about the fixed axis of rotation 21 relative to the carrier body 3.
- the lever 20 is articulated on the carrier body 3 by means of a swivel joint 320 which is arranged between the carrier body 3 and the lever 20 and connects the two to one another.
- a swivel joint 320 can be realized, for example, by a deformable connection between the lever 20 and the carrier body 3.
- connection 320 is arranged between the edge 301 of the opening 310 and an end 201 of the lever 20 facing this edge 301.
- the connection 320 has, for example, a flexible connecting strap 321, which is rigid in the direction vertical to the drawing plane of FIG. 2, flexible in the direction parallel to the drawing plane and perpendicular to the lever axis 200.
- connection 320 defines an axis of rotation 21, which is not quite fixed relative to the carrier body 3 and thus to the fiber 1, but is shifted within certain permissible limits.
- the latter means that the axis of rotation 21 is essentially fixed.
- the point of application 23 of the force K or K ⁇ to be measured lies between the axis of rotation 21 and the attachment point 22, in contrast to FIG. 1, in which the axis of rotation 21 is arranged between the point of application 23 and the attachment point 22.
- the force K or K to be measured is generated, for example, by a piezo actuator 4 or another body made of piezoelectric material, which is fixedly connected to the carrier body 3 and lever 20 and is dependent on an applied electrical voltage U along a Actuator axis 400 stretches and / or contracts which is parallel to the plane of the drawing in FIG. 2 and intersects lever axis 200 vertically or obliquely at point of application 23.
- the expanding and / or contracting piezo actuator 4 exerts on the lever 20 a force K or K ⁇ to be measured, which is directed at the point of attack 23 and can be regarded as acting there.
- the piezo actuator 4 which is firmly connected to the support body 3 and lever 20, forms a force generating device for generating the mechanical force K or K ⁇ to be measured, which is to be implemented by the force transmission device 2.
- the piezoelectric actuator 4 itself forms a conversion means for converting a mechanical force to be measured by the K, and K ⁇ different physical size, in this case, the electrical voltage U, in this power K, or K '.
- a body made of a material is used to generate the force to be measured, which body expands and / or contracts depending on, for example, the temperature or a magnetic field strength, the example according to FIGS. or magnetic sensor can each be realized with great sensitivity.
- the distance d1 between the axis of rotation 21 and the attachment point 22 of the lever 20 on the conductor 1 is smaller than the distance d2 between the axis of rotation 21 and the point of application 23 of the force K or K ⁇ to be measured on the lever 20.
- FIG. 4 shows a special implementation of the example according to FIG. 3. Apart from the other leverage ratios, this implementation differs from the implementation example according to FIG. 2 only in the other way of generating the force K or K ⁇ to be eaten. Otherwise, the implementation according to FIG. 4 is constructed in the same way as the implementation example according to FIG. 2, and parts which correspond to one another are identified by the same reference symbols.
- the attachment point 22 of the lever 20 is between the axis of rotation 21 of the lever 20 and the point of application 23 of the force K or K to be measured ⁇ arranged.
- the force to be measured K or K ⁇ in this case is, for example, the inertial force, which is an inertial mass M of the lever
- the lever 20 with the axis of rotation 21 and the mass M itself forms a converter device for converting a physical quantity different from the mechanical force K or K ⁇ to be measured, here an acceleration, into this force K or K ⁇ .
- Kl are implemented, which is sufficient to stretch the grid 11, and in addition sufficient deflections can be obtained.
- Each of the devices shown in the figures is generally operated in such a way that the optical radiation P is coupled into the fibers and guided in the fiber 1 to the Bragg grating 11 and the Bragg wavelength ⁇ l reflected by the grating 11 is measured.
- the measured wavelength ⁇ l or its displacement is a measure of the force to be measured or physical size.
- FIG. 2 shows a reference fiber 5 with a reference Bragg grating 51 for the compensation of temperature-related effects.
- the reference fiber 5 is arranged parallel to the fiber 1, bridges the cavity 30 and lever 20 without tension and is attached to the support body 3 at points 52 and 54 on the surface section 31 such that a temperature-related expansion of the support body 3 does not result in any measurable mechanical tension in the Reference fiber 5 generated.
- the reference fiber 5 and the fiber 1 are taken from the same fiber.
- the reference Bragg grating 51 and the Bragg grating 11 are of identical design.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020017010861A KR20010108257A (ko) | 1999-02-24 | 2000-02-02 | 기계적 힘을 측정하기 위한 브래그 그레이팅 장치와, 그장치의 용도 및 작동 방법 |
PL00350130A PL350130A1 (en) | 1999-02-24 | 2000-02-02 | Bragg grating device for measuring a mechanical force, utilization of said device and method for operating the same |
EP00912340A EP1157263A1 (de) | 1999-02-24 | 2000-02-02 | Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung |
JP2000601412A JP2002538426A (ja) | 1999-02-24 | 2000-02-02 | 機械的力を測定するブラッグ格子装置、ブラッグ格子装置の使用法、およびブラッグ格子装置を駆動する方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19907932.3 | 1999-02-24 | ||
DE19907932 | 1999-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000050864A1 true WO2000050864A1 (de) | 2000-08-31 |
Family
ID=7898681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/000317 WO2000050864A1 (de) | 1999-02-24 | 2000-02-02 | Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1157263A1 (de) |
JP (1) | JP2002538426A (de) |
KR (1) | KR20010108257A (de) |
CN (1) | CN1341208A (de) |
DE (1) | DE19939583A1 (de) |
PL (1) | PL350130A1 (de) |
WO (1) | WO2000050864A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CA2436753C (en) | 2001-02-06 | 2009-03-17 | Weatherford/Lamb, Inc. | Highly sensitive cross axis accelerometer |
JP4786808B2 (ja) * | 2001-03-02 | 2011-10-05 | 株式会社東横エルメス | 光ファイバひずみ検出装置 |
DE10223870A1 (de) * | 2002-05-29 | 2003-12-11 | Daimler Chrysler Ag | Vorrichtung mit einem elektromagnetischen Aktuator |
CN100523754C (zh) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | 基于等强度梁的光纤压强传感器 |
JP5162275B2 (ja) * | 2008-02-28 | 2013-03-13 | アンリツ株式会社 | 振動検出器 |
JP5313608B2 (ja) * | 2008-09-26 | 2013-10-09 | 長野計器株式会社 | 光ファイバセンサ |
CN101840615B (zh) * | 2010-04-09 | 2012-01-11 | 武汉理工大学 | 光纤布喇格光栅智能定址周界入侵自适应报警系统 |
DE102013101432B4 (de) * | 2013-02-13 | 2019-07-04 | fos4X GmbH | Faseroptischer Beschleunigungssensor mit Hebel |
DE102014117914B4 (de) | 2014-12-04 | 2021-11-11 | fos4X GmbH | Verfahren zur Erfassung eines Flatterns eines Rotorblatts einer Windkraftanlage |
CN107076584B (zh) | 2015-05-08 | 2020-11-24 | 辉固科技有限公司 | 光学传感器设备、传感器装置以及缆线 |
DE102015217430A1 (de) * | 2015-09-11 | 2017-03-16 | Siemens Aktiengesellschaft | Faseroptischer Beschleunigungssensor |
CN106442791B (zh) * | 2016-10-14 | 2019-04-26 | 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) | 一种甘蔗叶片中茉莉酸含量的hplc检测方法 |
CN106644203B (zh) * | 2016-11-24 | 2019-02-19 | 中国科学院武汉岩土力学研究所 | 一种基于三维光纤地应力传感器的应力敏感元件 |
DE102016125612B4 (de) | 2016-12-23 | 2022-05-05 | fos4X GmbH | Faseroptischer Beschleunigungssensor mit Hebel |
CN107907252A (zh) * | 2017-10-23 | 2018-04-13 | 沈阳建筑大学 | 一种杠杆式光纤光栅压力传感器 |
GB2592274A (en) * | 2020-02-24 | 2021-08-25 | Laser Inst Of Shandong Academy Of Science | Optical fiber grating acceleration sensor |
NL2024979B1 (en) * | 2020-02-24 | 2021-10-14 | Laser Inst Of Shandong Academy Of Science | Optical fiber grating acceleration sensor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0418490A2 (de) * | 1989-09-16 | 1991-03-27 | Hommelwerke GmbH | Kraftmesser |
DE4124685A1 (de) * | 1991-07-25 | 1992-11-12 | Schenck Ag Carl | Verfahren und anordnung zur messung einer mechanischen groesse |
US5682445A (en) * | 1995-01-09 | 1997-10-28 | Optelecom, Inc. | Strain based optical fiber devices |
DE19648403C1 (de) * | 1996-11-22 | 1998-04-02 | Thomas Dr Ing Nagel | Sensor zur Erfassung von Druck- und/oder Zugkräften |
WO1998031987A1 (en) * | 1997-01-21 | 1998-07-23 | Cidra Corporation | Multiparameter fiber optic sensor for use in harsh environments |
US5841131A (en) * | 1997-07-07 | 1998-11-24 | Schlumberger Technology Corporation | Fiber optic pressure transducers and pressure sensing system incorporating same |
-
1999
- 1999-08-20 DE DE19939583A patent/DE19939583A1/de not_active Ceased
-
2000
- 2000-02-02 EP EP00912340A patent/EP1157263A1/de not_active Withdrawn
- 2000-02-02 KR KR1020017010861A patent/KR20010108257A/ko not_active Application Discontinuation
- 2000-02-02 JP JP2000601412A patent/JP2002538426A/ja active Pending
- 2000-02-02 PL PL00350130A patent/PL350130A1/xx unknown
- 2000-02-02 CN CN00804271A patent/CN1341208A/zh active Pending
- 2000-02-02 WO PCT/DE2000/000317 patent/WO2000050864A1/de not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0418490A2 (de) * | 1989-09-16 | 1991-03-27 | Hommelwerke GmbH | Kraftmesser |
DE4124685A1 (de) * | 1991-07-25 | 1992-11-12 | Schenck Ag Carl | Verfahren und anordnung zur messung einer mechanischen groesse |
US5682445A (en) * | 1995-01-09 | 1997-10-28 | Optelecom, Inc. | Strain based optical fiber devices |
DE19648403C1 (de) * | 1996-11-22 | 1998-04-02 | Thomas Dr Ing Nagel | Sensor zur Erfassung von Druck- und/oder Zugkräften |
WO1998031987A1 (en) * | 1997-01-21 | 1998-07-23 | Cidra Corporation | Multiparameter fiber optic sensor for use in harsh environments |
US5841131A (en) * | 1997-07-07 | 1998-11-24 | Schlumberger Technology Corporation | Fiber optic pressure transducers and pressure sensing system incorporating same |
Also Published As
Publication number | Publication date |
---|---|
PL350130A1 (en) | 2002-11-04 |
KR20010108257A (ko) | 2001-12-07 |
CN1341208A (zh) | 2002-03-20 |
JP2002538426A (ja) | 2002-11-12 |
DE19939583A1 (de) | 2000-09-14 |
EP1157263A1 (de) | 2001-11-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1157263A1 (de) | Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung | |
DE19643182B4 (de) | Schwingungskonstruktion | |
EP1190262B1 (de) | Bragg-gitter-vorrichtung zur messung einer beschleunigung | |
DE19739594A1 (de) | Elektrostriktiver Stellantrieb | |
CH660917A5 (de) | Biegefeder. | |
CH685648A5 (de) | Mehrkomponenten-Kraft- und Moment-Messanordnung. | |
EP2361443B1 (de) | Elektromechanischer energiewandler zur erzeugung von elektrischer energie aus mechanischen bewegungen | |
WO2006133753A1 (de) | Halterung für einen massstab | |
DE2829425A1 (de) | Verfahren und vorrichtung zum messen von beschleunigungen an schwingenden koerpern | |
DE2117477B2 (de) | Kraftmeßwertwandler | |
DE2556298C2 (de) | Piezoelektrischer Beschleunigungsgeber | |
DE10336232B4 (de) | Kapazitiver Sensor für dynamische Größen | |
EP0096262B1 (de) | Faseroptischer Sensor zur Messung von dynamischen Grössen | |
DE3327266C2 (de) | ||
WO2001014840A1 (de) | Bragg-gitter-vorrichtung zum messen einer mechanischen kraft sowie anwendung und verfahren zum betrieb der vorrichtung | |
DE4424635A1 (de) | Mikromechanischer Beschleunigungssensor | |
EP0491151A1 (de) | Kraftmessvorrichtung zur Messung der Zugspannung von Fäden | |
DE102020106418A1 (de) | Vorrichtung zum Aufbringen von Kräften auf eine Umgebung | |
DE10035833A1 (de) | Vorrichtung zur Veränderung der Länge der Laufstrecke einer elektromagnetischen Welle | |
DE3301117C2 (de) | Waage | |
DE19509485C1 (de) | Schwingungsisolator | |
DE19518123A1 (de) | Belastungssensor | |
DE102005022876A1 (de) | Positionierer mit optischer Positionserfassungseinrichtung | |
DE2827061B2 (de) | Kraftmeßdose | |
DE60305953T2 (de) | Vorrichtung zur zweidimensionalen verschiebung |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 00804271.3 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN IN JP KR PL RU US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000912340 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: IN/PCT/2001/00741/DE Country of ref document: IN |
|
ENP | Entry into the national phase |
Ref document number: 2000 601412 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020017010861 Country of ref document: KR Ref document number: 09914233 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000912340 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020017010861 Country of ref document: KR |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2000912340 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1020017010861 Country of ref document: KR |