CN109029804B - Fiber grating sensor and tire three-dimensional force measuring device - Google Patents
Fiber grating sensor and tire three-dimensional force measuring device Download PDFInfo
- Publication number
- CN109029804B CN109029804B CN201810687735.4A CN201810687735A CN109029804B CN 109029804 B CN109029804 B CN 109029804B CN 201810687735 A CN201810687735 A CN 201810687735A CN 109029804 B CN109029804 B CN 109029804B
- Authority
- CN
- China
- Prior art keywords
- fiber
- grating
- fiber grating
- inner rod
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 211
- 229920001971 elastomer Polymers 0.000 claims description 17
- 239000000806 elastomer Substances 0.000 claims description 16
- 230000000452 restraining effect Effects 0.000 claims description 3
- 239000008281 solid sol Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 206010070834 Sensitisation Diseases 0.000 description 5
- 230000008313 sensitization Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a fiber bragg grating sensor and a tire three-dimensional force measuring device, wherein the fiber bragg grating sensor comprises a contact plate, an inner rod, a fiber bragg grating and a base; the base is of a cylindrical structure with an opening at one end, the inner rod is positioned in the base, one end of the inner rod penetrates through the opening of the base and is fixed on one side of the contact plate, the other end of the inner rod is fixed on the inner side of a first elastic body, the first elastic body is fixed at the bottom of the base and is of a cylindrical structure with openings at two ends, and the fiber bragg grating is installed between the inner rod and the base; the fiber bragg gratings comprise a first fiber bragg grating, a second fiber bragg grating and a third fiber bragg grating; the first fiber bragg grating extends along the axial direction of the inner rod and penetrates through the first elastic body; the first fiber grating, the second fiber grating and the third fiber grating are arranged in a mutually vertical mode in pairs. The sensor and the measuring device have the advantages of simple structure and high measuring sensitivity and accuracy.
Description
Technical Field
The invention relates to the technical field of sensing detection, in particular to a fiber bragg grating sensor and a tire three-dimensional force measuring device.
Background
The forces required for loading, traction and operation of the vehicle are all generated on the contact surface of the tire and the road surface, and three-way forces, namely traction force, lateral force and vertical force generated by the contact of the tire and the ground surface, must be analyzed to find the most favorable contact condition of the tire and the road surface, evaluate the structural performance of a tread pattern, reduce the abrasion of the tread, improve the operation stability of the vehicle and the like.
The fiber grating sensor is a novel sensor which uses light as a carrier and optical fibers as a propagation medium to sense and transmit external signals. The FBG sensor has the advantages of small volume, electromagnetic interference resistance, high measurement precision, short response time, distributed measurement for realizing remote monitoring and transmission and the like. The stress and strain monitoring of the tire by using the fiber grating sensor has become an important research direction.
Most of the existing fiber grating sensors can only measure force in a single direction. However, when the vehicle contacts the road surface, the three-directional force of the tire is generated simultaneously. The fiber grating sensor for measuring the force in a single direction does not meet the actual requirement, so that the sensor which can simultaneously detect the force in three directions of the tire and has the sensitivity enhancing effect needs to be researched. In addition, in the process of measuring the three-dimensional force, the fiber bragg grating in the sensor is mostly in a patch type, so that the measurement accuracy needs to be improved.
Disclosure of Invention
Technical problem to be solved
The invention provides a fiber bragg grating sensor and a tire three-dimensional force measuring device, and aims to solve the technical problems that the three-dimensional force of a tire is difficult to measure simultaneously and the measuring precision is low.
(II) technical scheme
In order to solve the above technical problem, according to an aspect of the present invention, there is provided a fiber grating sensor, including a contact plate, an inner rod, a fiber grating, and a base; the base is of a cylindrical structure with an opening at one end, the inner rod is positioned in the base, one end of the inner rod penetrates through the opening of the base and is fixed on one side of the contact plate, the other end of the inner rod is fixed on the inner side of a first elastic body, the first elastic body is fixed at the bottom of the base, the first elastic body is of a cylindrical structure with openings at two ends, and the fiber bragg grating is installed between the inner rod and the base;
the fiber bragg gratings comprise a first fiber bragg grating, a second fiber bragg grating and a third fiber bragg grating; the first fiber bragg grating extends along the axial direction of the inner rod and penetrates through the first elastic body; the first fiber grating, the second fiber grating and the third fiber grating are arranged in a mutually vertical mode in pairs.
Further, the inner diameter of the first elastic body is larger than the outer diameter of the first fiber grating.
Further, the length of the first elastic body when the first elastic body is not deformed is larger than the length of the first fiber bragg grating when the first fiber bragg grating is not deformed.
Further, the second fiber grating and the third fiber grating are located on the same plane.
Furthermore, the extending directions of the second fiber bragg grating and the third fiber bragg grating respectively correspond to the two force-bearing directions of the contact plate.
Further, the rubber also comprises a second elastic body; one end of the second elastic body is connected with the contact plate, and the other end of the second elastic body is connected with the base.
Further, an arc-shaped baffle is arranged at the opening of the base; one side of the arc-shaped baffle is fixedly connected with the inner wall of the base, the other side of the arc-shaped baffle is an inner arc surface, and the inner arc surface is attached to the side wall of the inner rod and used for restraining the direction of the acting force generated by the inner rod on the second fiber grating and the third fiber grating.
Furthermore, the radian of the inner arc surface is α, wherein pi/2 is not less than α not more than pi.
Further, the first fiber grating, the second fiber grating and the third fiber grating are bonded to the inner rod and the base through solid sol.
The invention also provides a tire three-dimensional force measuring device which comprises the fiber bragg grating sensor.
(III) advantageous effects
The application provides a fiber grating sensor and tire three-dimensional force measuring device, its beneficial effect mainly as follows:
the fiber bragg grating sensor disclosed by the invention has the advantages that the tire acts on a tire contact plate through the tire to generate three-way force, so that the first elastic body and the second elastic body generate bending and vertical strain, the second fiber bragg grating and the third fiber bragg grating generate tensile strain under the action of the inner rod, the first fiber bragg grating returns to the tensile strain state under the action of the inner rod, the three-way force is transmitted to the three fiber bragg gratings through the inner rod, the fiber bragg gratings reflect light beams with central wavelengths to form wavelength difference, and the detection sensitivity and accuracy can be improved.
According to the three-dimensional force that the central wavelength precision measurement tire produced that detects, because three fiber grating are unsettled centre gripping, fiber grating strain receives interior pole strain influence less, and fiber grating strain value is far away than interior pole strain value, has the sensitization effect of meeting an emergency, and this sensor can detect the power of the three direction of tire simultaneously promptly, and the sensor structure has the sensitization effect of meeting an emergency.
Drawings
FIG. 1 is a schematic structural diagram of a fiber grating sensor according to an embodiment of the present invention;
FIG. 2 is a full cross-sectional view of a fiber grating sensor according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2 of a fiber grating sensor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fiber grating sensor according to an embodiment of the present invention;
FIG. 5 is an exploded view of a fiber grating sensor according to an embodiment of the present invention;
in the drawings, 1-contact plate; 2-an inner rod; 3-a second elastomer a; 4-a second elastomer B; 5-a second elastomer C; 6-a second elastomer D; 7-a second fiber grating; 8-a third fiber grating; 9-a first fiber grating; 10-a first elastomer; 11-base 12-arc baffle.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a suspended clamping type fiber grating sensor, which includes a base 11, a contact plate 1, an inner rod 2, and a fiber grating. The base 11 has a hollow cylindrical structure, and has an opening at one end. The inner rod 2 is located inside the hollow cylindrical structure of the base 11. One end of the inner lever 2 is inserted through an opening of the base 11, extends out of the base 11, and is fixed to one side of the contact plate 1. The plate surface of the contact plate 1 is vertical to the inner rod 2. The other end of the inner rod 2 is located inside the base 11 and connected to the first elastic body 10, and the first elastic body 10 is also located inside the base 11 and fixed to the bottom of the base 11. That is, the first elastic body 10 is located between the bottom of the base 11 and the inner rod 2.
Further, the fiber grating is installed between the inner rod 2 and the base 11. Specifically, the fiber grating includes a first fiber grating 9, a second fiber grating 7, and a third fiber grating 8. The first fiber bragg grating 9 extends along the axial direction of the inner rod 2; the first fiber grating 9 passes through the inside of the first elastic body 10.
The first elastic body 10 has a hollow cylindrical structure with both ends open. The first elastic body 10 is located inside the base 11, one end of the first elastic body 10 is connected with the inner rod 2, and the other end is fixed at the bottom of the base 11. One end of the first fiber grating 9 is connected with one end of the inner rod 2, and the other end of the first fiber grating passes through the inside of the hollow cylindrical structure of the first elastic body 10 and the bottom of the base 11 to connect with an optical fiber and output a detection signal.
Further, the first fiber grating 9, the second fiber grating 7 and the third fiber grating 8 are arranged two by two and perpendicular to each other. In actual use, the contact plate 1 is disposed parallel to the ground, and the inner rod 2 and the base 11 are disposed in a vertical direction. The tire is pressed by the upper side of contact plate 1, and three-way force is generated between the tire and contact plate 1: traction, lateral and vertical forces. By adopting three optical fiber gratings which are vertical two by two, the forces in three different directions of the traction force, the lateral force and the vertical force can be detected simultaneously.
Specifically, referring to fig. 2, the first fiber grating 9 extends along the axial direction of the inner rod 2, when the inner rod 2 is in the vertical direction, the first elastic body 10 is deformed downward under the action of the inner rod 2, the first fiber grating 9 is also in the vertical direction, and accordingly, the strain amount is changed, and the light beam with the central wavelength is reflected by the fiber grating to form a wavelength difference, so as to measure the vertical force. Similarly, the second fiber grating 7 and the third fiber grating 8 are both perpendicular to the first fiber grating 9, that is, the second fiber grating 7 and the third fiber grating 8 are both arranged along the horizontal direction, and when the inner rod 2 generates a lateral force and a traction force in the horizontal direction, the second fiber grating 7 and the third fiber grating 8 generate a strain amount for measuring the traction force and the lateral force.
In a specific embodiment, the inner diameter of the first elastic body 10 is larger than the outer diameter of the first fiber grating 9. On the basis of the above embodiment, in the present embodiment, by making the inner diameter of the first elastic body 10 larger than the diameter of the first fiber grating 9, the inner wall of the first elastic body 10 does not contact the side wall of the first fiber grating 9, thereby avoiding the first elastic body 10 from generating other directional forces on the first fiber grating 9; the strain value of the first fiber grating 9 is far larger than the strain of the inner rod 2, and the first fiber grating 9 is less affected by the strain of the inner rod 2, so that the accuracy of the first fiber grating 9 in detecting the vertical force is improved.
In a specific embodiment, the length of the first elastic body 10 when not deformed is larger than the length of the first fiber grating 9 when not deformed. On the basis of the above embodiments, in the present embodiment, by making the initial state of the first fiber grating 9 in the stretched state, when the contact plate 1 is subjected to the vertical force, the inner rod 2 moves downward, so that the first fiber grating 9 returns to the original state of the unstretched fiber grating. Because the first fiber bragg grating 9 is arranged between the bottom of the inner rod 2 and the bottom of the base 11, when the length of the first elastic body is longer than that of the first fiber bragg grating 9, the distance between the bottom of the inner rod and the bottom of the base can be longer than that of the first fiber bragg grating, so that the initial state of the first fiber bragg grating is kept in a stretching state, and the sensitivity of detecting the vertical force is improved.
Because the fiber bragg grating is sensitive to tensile strain and insensitive to compressive strain in an unstretched original state, if the fiber bragg grating is directly compressed by applying pressure, the sensitivity and accuracy of vertical force detection are affected. When the initial state of the first fiber grating 9 is in a stretched state, the strain amount of the first fiber grating 9 is changed greatly in the process of returning to the unstretched initial state under the action of a vertical force, so that the sensitivity of the first fiber grating 9 to the detection of the vertical force can be enhanced.
In a specific embodiment, the second fiber grating 7 and the third fiber grating 8 are located on the same plane. On the basis of the above embodiments, in the present embodiment, by making the second fiber bragg grating 7 and the third fiber bragg grating 8 in the same horizontal plane, when the tire contacts the contact plate 1 and the acting force generated by the tire is transmitted downward by the contact plate 1 and the inner rod 2, the accuracy of detecting the lateral force and the traction force can be improved by the second fiber bragg grating 7 and the third fiber bragg grating 8 which are in the same plane and are arranged perpendicular to each other.
It can be understood that, referring to fig. 3, one end of the second fiber grating 7 is connected to the side wall of the inner rod 2, and as a specific implementation, the side wall of the inner rod 2 can be embedded into the inner rod 2; and the other end thereof penetrates through the side wall of the base 11 and is connected with an optical fiber to output a detection signal. One end of the third fiber grating 8 is connected with the side wall of the inner rod 2, and the other end thereof is connected with the other fiber to output a detection signal, which is sensed by the side wall of the base 11. Preferably, the extension lines of the second fiber grating 7 and the third fiber grating 8 both pass through the center of the inner rod 2.
The inner diameter of the base 11 is larger than that of the inner rod 2; when the second fiber grating 7 and the third fiber grating 8 are connected with the inner rod 2 at one end and the other end passes through the side wall of the base 11, the second fiber grating 7 and the third fiber grating 8 are both arranged in a suspended mode, so that the interference of the inner rod 2 and the base 11 to the fiber gratings which additionally generate other directional forces can be avoided from influencing the accuracy of the measurement result in the process of measuring the traction force and the lateral force of the second fiber grating 7 and the third fiber grating 8.
Specifically, when the tire is in contact with the contact plate 1, the generated three-way force is transmitted downwards through the contact plate 1 and the inner rod 2, the first fiber bragg grating 9 is arranged to extend along the axial direction of the inner rod 2 to measure the vertical force in the three-way force, the second fiber bragg grating 7 and the third fiber bragg grating 8 are arranged to be perpendicular to the radial direction of the inner rod 2, and the second fiber bragg grating 7 and the third fiber bragg grating 8 are arranged to be perpendicular to each other to measure the traction force and the lateral force in the three-way force.
In a specific embodiment, the extending directions of the second fiber grating 7 and the third fiber grating 8 correspond to two force-receiving directions of the contact plate 1, respectively. On the basis of the above embodiments, in the present embodiment, the extending direction of the second fiber grating 7 and the extending direction of the third fiber grating 8 correspond to the direction of the traction force and the lateral force, so that the extending direction of the fiber gratings coincides with the direction of the applied force, thereby improving the accuracy of detecting the three-directional force.
For example, the extending direction of the second fiber grating 7 is made to coincide with the force receiving direction of the pulling force, and accordingly, the extending direction of the third fiber grating 8 is made to coincide with the force receiving direction of the lateral force. When the inner rod 2 receives force, the second fiber bragg grating 7 and the third fiber bragg grating 8 can be stretched along the force-receiving direction to generate strain, and then lateral force and traction force are detected.
In a specific embodiment, as shown in fig. 4, the contact plate further includes a second elastic body, one end of the second elastic body is connected to the contact plate 1, and the other end of the second elastic body is connected to the base 11. On the basis of the above embodiments, the present embodiment facilitates the support of the contact plate 1 by the base 11 by disposing the second elastic body between the contact plate 1 and the base 11, so as to improve the detection sensitivity to the three-directional force.
It can be understood that, since the base 11 has a hollow structure, when the second elastic body is disposed between the contact plate 1 and the base 11, the second elastic body may be plural and uniformly arranged along the circumferential direction of the base 11; preferably, the number of the second elastomers is four, for example, as shown in fig. 1, a second elastomer a3, a second elastomer B4, a second elastomer C5 and a second elastomer D6.
In a specific embodiment, an arc-shaped baffle 12 is arranged at the opening of the base 11; one side of the arc-shaped baffle 12 is fixedly connected with the inner wall of the base 11, the other side of the arc-shaped baffle 12 is an inner arc surface, and the inner arc surface is attached to the side wall of the inner rod 2 and used for restraining the direction of the acting force generated by the inner rod 2 on the second fiber bragg grating 7 and the third fiber bragg grating 8. Namely, one side of the arc-shaped baffle plate 12 is fixedly connected with the inner wall of the base 11, the other side of the arc-shaped baffle plate is attached to the side wall of the inner rod 2, and one side of the arc-shaped baffle plate 12 attached to the inner rod 2 is provided with an arc surface; and the cross sections of the arc-shaped baffle plates are the same in shape.
On the basis of the above embodiments, referring to fig. 3, the arc-shaped baffle 12 is arranged at the opening at the upper end of the base 11 and is fixedly connected with the base 11; the thickness of the arc-shaped baffle 12 in the vertical direction can be adjusted as required, so long as the limitation on the movement direction of the inner rod 2 can be met, and the suspended state of the first fiber grating 9 and the third fiber grating 8 can not be influenced. The side contacting the inner rod 2 has a structure of an inner arc surface, which is convenient for the stability of contacting the inner rod 2.
Referring to fig. 1, when the traction direction is leftward, the inner rod 2 is forced to move leftward, the base 11 is fixed, so that the second fiber grating 7 is stretched leftward, and meanwhile, the inner rod 2 cannot move rightward due to the arc-shaped baffle 12, the radian pi/2 of the inner arc surface is not less than α and not more than pi, preferably, the radian is pi/2, so that the inner rod 2 can be prevented from moving in other directions.
In a specific embodiment, the first fiber grating 9, the second fiber grating 7 and the third fiber grating 8 are bonded to the inner rod 2 and the base 11 by a solid-sol.
In a particular embodiment, one end of the inner rod 2 is provided with a protrusion having an external thread; accordingly, one end of the first elastic body 10 has an internal thread; the inner rod 2 is fixed to the first elastic body 10 by screwing.
In a specific embodiment, the bottom of the base 11 is provided with a boss; the shape of the outer side surface of the boss is the same as the shape of the inner side surface of the other end of the first elastic body 10, so that the first elastic body 10 can be sleeved on the outer side of the boss to achieve the purpose of connecting the first elastic body 10 with the base 11.
It is understood that the side wall of the first elastic body 10 may be a hollow structure to facilitate the connection setting of the first fiber grating 9 inside the first elastic body 10.
Further, first elastomer 10 and second elastomer all are elastic member, can be spring steel or other elastic members, as long as can satisfy under the stress, can take place the dependent variable, can not influence the accurate measurement of fiber grating to the three-dimensional force.
The first elastic body 10 and the second elastic body are combined with the fiber bragg grating, so that the sensitivity and the accuracy of the sensor for detecting the three-dimensional force can be effectively improved. Specifically, the strain relation between the elastic body and the fiber grating can be obtained by the strain transfer formula of the clamping fiber grating. The strain transfer equation can be expressed as:
in the formula: eSAnd EfThe elastic moduli of the inner rod and the optical fiber are respectively; a. theSAnd AfThe cross section areas of the inner rod and the fiber bragg grating are respectively; p is the axial force between two fixed points of the sensor; l isSAnd LfThe fixed length of the inner rod and the suspended length of the fiber bragg grating are respectively; epsilonsAnd epsilonfRespectively, the strain of the inner rod and the strain of the fiber bragg grating.
The strain relationship between the elastomer and the fiber grating can be obtained from the formula (3). Wherein the influencing factor is the elastic modulus E of the fiber gratingfCross-sectional area A of the fiber gratingfModulus of elasticity E of inner rodSAnd the cross-sectional area A of the inner rodSThus the ratio of inner rod to fiber grating:
εS<<εf(5)
from equation (4): due to the sectional area A of the fiber gratingfFar smaller than the sectional area A of the inner rodSAnd the elastic modulus of the fiber bragg grating is smaller than that of the inner rod, and relative to the fiber bragg grating, the strain of the inner rod can be ignored. The external deformation borne by the sensor is mainly concentrated on the fiber grating, the transmission rate exceeds 100 percent, and the sensor has the advantages ofHas strain sensitization effect.
The three fiber gratings are designed to be in a suspended clamping state, the first elastic body 10 and the second elastic body can generate bending and vertical strain to a certain degree, and the acting force of the fiber gratings can be amplified mechanically. Compared with the existing surface-mounted fiber grating sensor, the strain transmissibility of the sensor is higher, the strain value of the optical fiber is far greater than the strain of the contact inner rod of the sensor, and the strain sensitivity enhancing effect is achieved.
Due to the fact that the problems of vehicle running conditions, tire material nonlinearity, geometric nonlinearity and contact nonlinearity are complex, the arc-shaped baffle 12 on the top of the base 11 can restrict the direction of the acting force generated by the inner rod 2 on the third fiber bragg grating 8 and the second fiber bragg grating 7, and therefore the traction force and the lateral force of the tire can be measured more accurately.
In a specific embodiment, a tire three-dimensional force measuring device is also provided, which comprises the fiber grating sensor. And outputting a detection signal of at least one fiber grating sensor, and converting the detection signal into an electric signal through a fiber grating demodulator so as to analyze the three-dimensional force.
The invention relates to a fiber grating sensor and a tire three-direction force measuring device, wherein the fiber grating sensor acts on a tire contact plate 1 through a tire to generate three-direction force, so that a first elastic body 10 and a second elastic body generate bending and vertical strain, a second fiber grating 7 and a third fiber grating 8 generate tensile strain under the action of an inner rod 2, a first fiber grating 9 recovers the tensile strain state under the action of the inner rod 2, so that the three-direction force is transmitted to three fiber gratings through the inner rod 2, and the fiber gratings reflect light beams with central wavelength to form wavelength difference. According to the three-dimensional force that the central wavelength precision measurement tire produced that detects, because three fiber grating are unsettled centre gripping, fiber grating strain receives interior pole strain influence less, and fiber grating strain value is far away than interior pole strain, has the sensitization effect of meeting an emergency, and this sensor can detect the power of the three direction of tire simultaneously promptly, and the sensor structure has the sensitization effect of meeting an emergency.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A fiber bragg grating sensor is characterized by comprising a contact plate, an inner rod, a fiber bragg grating and a base; the base is of a cylindrical structure with an opening at one end, the inner rod is positioned in the base, one end of the inner rod penetrates through the opening of the base and is fixed on one side of the contact plate, the other end of the inner rod is fixed on the inner side of a first elastic body, the first elastic body is fixed at the bottom of the base and is of a cylindrical structure with openings at two ends, and the fiber bragg grating is installed between the inner rod and the base;
the fiber bragg gratings comprise a first fiber bragg grating, a second fiber bragg grating and a third fiber bragg grating; the first fiber bragg grating extends along the axial direction of the inner rod and penetrates through the first elastic body; the first fiber grating, the second fiber grating and the third fiber grating are arranged in a mutually vertical way in pairs,
an arc-shaped baffle is arranged at the opening of the base; one side of the arc-shaped baffle is fixedly connected with the inner wall of the base, the other side of the arc-shaped baffle is an inner arc surface, and the inner arc surface is attached to the side wall of the inner rod and used for restraining the direction of the acting force generated by the inner rod on the second fiber grating and the third fiber grating.
2. The fiber grating sensor of claim 1, wherein the first elastomer has an inner diameter that is larger than an outer diameter of the first fiber grating.
3. The fiber grating sensor of claim 1, wherein the first elastomer has a length when undeformed that is greater than a length of the first fiber grating when undeformed.
4. A fibre grating sensor according to any one of claims 1 to 3, wherein the second fibre grating and the third fibre grating are in the same plane.
5. The fiber grating sensor according to claim 1, wherein the extension directions of the second fiber grating and the third fiber grating respectively correspond to two force-receiving directions of the contact plate.
6. The fiber grating sensor of claim 1, further comprising a second elastomer; one end of the second elastic body is connected with the contact plate, and the other end of the second elastic body is connected with the base.
7. The fiber grating sensor of claim 1, wherein the intrados surface has a curvature of α, wherein pi/2 ≦ α ≦ pi.
8. The fiber grating sensor of claim 1, wherein the first fiber grating, the second fiber grating, and the third fiber grating are bonded to the inner rod and the base by a solid-sol.
9. A tire triaxial force measuring device comprising a fiber grating sensor according to any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687735.4A CN109029804B (en) | 2018-06-28 | 2018-06-28 | Fiber grating sensor and tire three-dimensional force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687735.4A CN109029804B (en) | 2018-06-28 | 2018-06-28 | Fiber grating sensor and tire three-dimensional force measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029804A CN109029804A (en) | 2018-12-18 |
| CN109029804B true CN109029804B (en) | 2020-05-01 |
Family
ID=65520770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810687735.4A Expired - Fee Related CN109029804B (en) | 2018-06-28 | 2018-06-28 | Fiber grating sensor and tire three-dimensional force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109029804B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558954A (en) * | 2020-04-17 | 2020-08-21 | 鲁班嫡系机器人（深圳）有限公司 | Force sensor assembly, measuring method, actuator comprising force sensor assembly and robot comprising force sensor assembly |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832762A (en) * | 2010-05-14 | 2010-09-15 | 北京品傲光电科技有限公司 | Fiber Bragg grating strain sensor |
| CN201955182U (en) * | 2011-03-05 | 2011-08-31 | 河南理工大学 | Fiber grating testing device for testing three dimensional stress states of rocks |
| CN102175366A (en) * | 2011-03-05 | 2011-09-07 | 河南理工大学 | Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state |
| CN102840908A (en) * | 2012-08-17 | 2012-12-26 | 苏州南智传感科技有限公司 | Vibration sensor of three-component fiber grating |
| CN103105251A (en) * | 2013-01-23 | 2013-05-15 | 杭州珏光物联网科技有限公司 | Optical fiber grating three-dimensional pressure sensor |
| CN103954386A (en) * | 2014-04-15 | 2014-07-30 | 沈阳建筑大学 | Three-dimensional space stress-strain measurement method based on fiber bragg grating sensor |
| CN104280169A (en) * | 2014-10-17 | 2015-01-14 | 武汉理工大学 | Ring type fiber bragg grating force measurement device and application thereof |
| CN104764546A (en) * | 2015-04-27 | 2015-07-08 | 武汉科技大学 | Device for testing contact stress between tire and road surface based on magnetic manometer heat image |
| CN106525299A (en) * | 2016-10-25 | 2017-03-22 | 武汉理工大学 | Temperature self-compensating fiber grating micro force sensor and manufacturing method thereof |
| CN107389254A (en) * | 2017-08-24 | 2017-11-24 | 武汉科技大学 | Tire road surface three axis force measurement apparatus and its measuring method |
-
2018
- 2018-06-28 CN CN201810687735.4A patent/CN109029804B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832762A (en) * | 2010-05-14 | 2010-09-15 | 北京品傲光电科技有限公司 | Fiber Bragg grating strain sensor |
| CN201955182U (en) * | 2011-03-05 | 2011-08-31 | 河南理工大学 | Fiber grating testing device for testing three dimensional stress states of rocks |
| CN102175366A (en) * | 2011-03-05 | 2011-09-07 | 河南理工大学 | Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state |
| CN102840908A (en) * | 2012-08-17 | 2012-12-26 | 苏州南智传感科技有限公司 | Vibration sensor of three-component fiber grating |
| CN103105251A (en) * | 2013-01-23 | 2013-05-15 | 杭州珏光物联网科技有限公司 | Optical fiber grating three-dimensional pressure sensor |
| CN103954386A (en) * | 2014-04-15 | 2014-07-30 | 沈阳建筑大学 | Three-dimensional space stress-strain measurement method based on fiber bragg grating sensor |
| CN104280169A (en) * | 2014-10-17 | 2015-01-14 | 武汉理工大学 | Ring type fiber bragg grating force measurement device and application thereof |
| CN104764546A (en) * | 2015-04-27 | 2015-07-08 | 武汉科技大学 | Device for testing contact stress between tire and road surface based on magnetic manometer heat image |
| CN106525299A (en) * | 2016-10-25 | 2017-03-22 | 武汉理工大学 | Temperature self-compensating fiber grating micro force sensor and manufacturing method thereof |
| CN107389254A (en) * | 2017-08-24 | 2017-11-24 | 武汉科技大学 | Tire road surface three axis force measurement apparatus and its measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109029804A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102162757B (en) | Fiber grating earth pressure sensor | |
| US9352629B2 (en) | Spring having a built-in deformation sensor | |
| US20080317401A1 (en) | Optic fiber bragg grating sensor | |
| US20120069324A1 (en) | High resolution large displacement/crack sensor | |
| JP2012503207A (en) | Industrial roll with optical roll cover sensor system | |
| CN109196394A (en) | Utilize the displacement detector of fiber-optic grating sensor and its adjusting method of sensitivity, durability | |
| US7612886B2 (en) | Fiber-optic seismic sensor | |
| Li et al. | Design of an enhanced sensitivity FBG strain sensor and application in highway bridge engineering | |
| CN109029804B (en) | Fiber grating sensor and tire three-dimensional force measuring device | |
| CN201707036U (en) | Differential type fiber grating strain transducer | |
| JP7519366B2 (en) | 2D Force Sensor | |
| Zhao et al. | A novel double-arched-beam-based fiber Bragg grating sensor for displacement measurement | |
| CN108253904B (en) | Sensitization type fiber bragg grating sensor, strain monitoring system and strain monitoring method | |
| US7094976B2 (en) | Vehicle weight measuring structure and vehicle weight measuring apparatus using the same | |
| CN215114777U (en) | Strain beam sensing device with double stress models | |
| CN114396999A (en) | Pressure sensor, pressure monitoring assembly and weighing device | |
| CN114910200A (en) | Sensitization design method of flat diaphragm fiber bragg grating pressure sensor | |
| CN219829976U (en) | Sensor device | |
| WO2009027951A1 (en) | A load measuring device | |
| CN112857537A (en) | Double-stress model strain beam sensing device and using method thereof | |
| RU111646U1 (en) | MECHANICAL STRESS MEASUREMENT DEVICE | |
| CN106525576B (en) | Embedded concrete shear stress sensor | |
| RU2530467C1 (en) | Strain-gauge sensor | |
| CN219038033U (en) | High-durability fiber bragg grating sensor | |
| US11782231B2 (en) | Installation of optical sensors for use in traffic monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200501 Termination date: 20210628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |