CN113125802A - Acceleration sensor - Google Patents

Acceleration sensor Download PDF

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Publication number
CN113125802A
CN113125802A CN202010044698.2A CN202010044698A CN113125802A CN 113125802 A CN113125802 A CN 113125802A CN 202010044698 A CN202010044698 A CN 202010044698A CN 113125802 A CN113125802 A CN 113125802A
Authority
CN
China
Prior art keywords
acceleration sensor
optical fiber
sensing section
swinging
deformation sensing
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.)
Pending
Application number
CN202010044698.2A
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Chinese (zh)
Inventor
张建平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Feixun Sensor Technology Shanghai Co ltd
Original Assignee
Aulton New Energy Automotive Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aulton New Energy Automotive Technology Co Ltd filed Critical Aulton New Energy Automotive Technology Co Ltd
Priority to CN202010044698.2A priority Critical patent/CN113125802A/en
Priority to PCT/CN2021/071599 priority patent/WO2021143742A1/en
Publication of CN113125802A publication Critical patent/CN113125802A/en
Pending legal-status Critical Current

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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
    • G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
    • 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
    • G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses an acceleration sensor, and belongs to the technical field of sensors. The acceleration sensor comprises a swinging component and an optical fiber, wherein the swinging component is arranged to swing freely, the optical fiber comprises a deformation sensing section, the first end of the deformation sensing section is arranged to swing freely along with the swinging component, and the second end of the deformation sensing section is arranged to be in a static state when the swinging component swings freely; when the swinging component swings, the deformation induction section bends due to different states at two ends, so that an optical signal returned by the optical fiber changes. In the invention, the acceleration sensor measures the acceleration of the object to be detected by adopting the optical fiber based on optical signal detection, and can stably operate in any environment of electromagnetism, atomic radiation, high temperature and strong corrosion.

Description

Acceleration sensor
Technical Field
The invention relates to the technical field of sensors, in particular to an acceleration sensor.
Background
The acceleration sensor is used to measure acceleration, and the existing acceleration sensor is usually based on electric signal detection, including capacitive type, inductive type, strain type, piezoresistive type, piezoelectric type, etc. However, the acceleration sensor based on the electrical signal detection has poor adaptability to the environment, and for example, under the working conditions of electromagnetic interference, atomic radiation interference, strong corrosion environment and high temperature environment, the acceleration sensor may fail, and thus is unstable.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and to provide an acceleration sensor.
The invention solves the technical problems through the following technical scheme:
the present invention provides an acceleration sensor, characterized by comprising:
a swing member configured to swing freely;
the optical fiber comprises a deformation sensing section, wherein a first end of the deformation sensing section is set to be in a state of freely swinging along with the swinging component, and a second end of the deformation sensing section is set to be in a static state when the swinging component freely swings;
when the swinging component swings, the deformation induction section bends due to different states at two ends, so that an optical signal returned by the optical fiber changes.
Preferably, the acceleration sensor further comprises a housing, the swinging member is disposed on the housing, and the second end of the deformation sensing section is disposed to be stationary relative to the housing.
In this scheme, acceleration sensor has protected swing part and deformation response section through setting up the casing to acceleration sensor's stability of operation in adverse circumstances has further been improved.
Preferably, the acceleration sensor further comprises a fixing member fixedly connected to the housing, and the swinging member is rotatably connected to the fixing member.
In this scheme, the casing is connected through the mounting to the swing part, the dismouting of being convenient for.
Preferably, a first end of the deformation sensing section is fixedly connected to the swinging component, and a second end of the deformation sensing section is fixedly connected to the fixing member or the housing.
In the scheme, the two ends of the deformation induction section are respectively fixed on the swinging component and the fixing component (or the shell), so that the deformation induction section is bent along with the swinging of the swinging component.
Preferably, the swinging component comprises a swinging rod, and one end of the swinging rod is rotatably connected to the fixed part.
In the scheme, the swinging component swings relative to the fixing piece by rotatably connecting one end of the swinging rod with the fixing piece.
Preferably, the swinging component further comprises a pendulum, and the pendulum is fixedly connected to the other end of the swinging rod.
In this scheme, through the fixed pendulum at the other end of pendulum rod, increased acceleration sensor's detection scope to the life-span of deformation response section has been improved.
Preferably, the fixing member includes an ear plate and a rotating shaft, and the swinging member is connected to the ear plate through the rotating shaft; wherein:
the ear plate is a single piece; or, the ear plates are two, and one end of the swinging component is positioned between the two ear plates.
In the two schemes, the fixing piece is embodied in the form of the ear plate, the structure is simple, and the swing rod is convenient to assemble.
Preferably, the deformation sensing section is located at one end of the optical fiber; alternatively, the first and second electrodes may be,
the deformation induction section is located in the middle of the optical fiber, and the end part of the optical fiber is fixedly connected to the swing component.
In the two schemes, the deformation induction section can be flexibly arranged at the end part or the middle part of the optical fiber.
Preferably, a through hole is formed in the housing, and the optical fiber penetrates through the through hole.
Preferably, the deformation sensing section is a fiber grating.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
in the invention, the acceleration sensor measures the acceleration of the object to be detected by adopting the optical fiber based on optical signal detection, and the optical signal detection is not interfered by electromagnetic, atomic radiation, high-temperature and strong corrosive environments, so that the acceleration sensor can stably operate in the environments.
Drawings
Fig. 1 is a schematic structural diagram of an acceleration sensor according to an embodiment of the present invention.
Description of reference numerals:
swinging part 1
Swing link 11
Pendulum bob 12
Optical fiber 2
Deformation sensing section 21
Case 3
Cavity 31
Fixing part 4
Ear plate 41
Detailed Description
The present invention is further illustrated by the following examples, but is not limited thereby in the scope of the examples described below.
Referring to fig. 1, an acceleration sensor according to an embodiment of the present invention includes a swinging component 1 configured to swing freely and an optical fiber 2, where the optical fiber 2 includes a deformation sensing section 21, a first end of the deformation sensing section 21 is configured to swing freely with the swinging component 1, and a second end of the deformation sensing section 21 is configured to be in a stationary state when the swinging component 1 swings freely; when the swinging member 1 swings, the deformation sensing section 21 is bent due to the different states of the two ends, so that the optical signal returned by the optical fiber 2 changes.
Specifically, the swinging member 1 may be directly or indirectly rotatably connected to the object to be measured, and may swing freely in the moving direction of the object to be measured. The acceleration sensor can be used as a part of the object to be measured by always arranging the swinging member 1 on the object to be measured, and can also be independently used and arranged on the object to be measured when measurement is needed.
The deformation sensing section 21 is a part of the optical fiber 2, and preferably the deformation sensing section 21 is a grating. The first end of the deformation sensing section 21 moves with the rocking member 1 and the second end is arranged to be stationary relative to the object to be measured at least during use.
When the object to be measured does acceleration or deceleration movement, the swinging component 1 moves along with the object to be measured and swings relative to the object to be measured, the deformation sensing section 21 can be bent, so that the optical signal returned by the optical fiber 2 changes, and then the signal output by the optical fiber 2 can be analyzed and calculated through external equipment, so that the acceleration parameter of the object to be measured is obtained.
As can be seen from the above, the acceleration sensor according to the embodiment of the present invention measures the acceleration of the object to be measured by using the optical fiber 2 based on optical signal detection, and the optical signal detection is not interfered by electromagnetic, atomic radiation, high-temperature, and strong corrosive environments, so that the acceleration sensor can stably operate in these environments.
Referring to fig. 1, the acceleration sensor further includes a housing 3, the swing member 1 is disposed on the housing 3, and the second end of the deformation sensing section is disposed to be stationary relative to the housing 3.
Specifically, the swing member 1 is rotatably connected to the housing 3, for example, the swing member 1 is connected to the housing 3 through a rotation pair structure, so that the swing member 1 and the housing 3 can rotate relatively at least in one direction. The housing 3 provides a position for mounting the swing member 1 and a cavity 31 for accommodating the swing member 1, and protects the swing member 1, thereby protecting the deformation sensing section 21.
As can be seen from the above, the acceleration sensor according to the embodiment of the present invention protects the swinging member 1 and the deformation sensing section 21 by the housing 3, so as to further improve the stability of the acceleration sensor in a severe environment.
With reference to fig. 1, the acceleration sensor further includes a fixing member 4 connected to the housing 3, and the swing member 1 is rotatably connected to the fixing member 4.
Specifically, one end of the fixing member 4 is fixed to the housing 3, and the other end is rotatably connected to the swinging member 1. The rotary connection of the fastening element 4 to the pivoting part 1 can be realized on the basis of the design of a revolute pair.
Alternatively, the fixing member 4 and the housing 3 may be integrally formed, or both may be two separate parts and integrally provided by, for example, welding.
With reference to fig. 1, the fixing member 4 includes an ear plate 41 and a rotating shaft, and the swing member 1 is connected to the ear plate 41 through the rotating shaft; wherein: the ear plate 41 is a single piece, or alternatively, the ear plate 41 is two pieces, and one end of the swinging member is located between the two pieces of the ear plate 41.
Specifically, the ear plate 41 is a plate-shaped structure, one end of the ear plate 41 is disposed on the housing 3, and the rotating shaft penetrates through the other end of the ear plate 41 and the swing link 11, so as to realize the rotating connection between the rotating shaft and the swing link 11. Furthermore, the two ends of the rotating shaft can be limited through the pin shaft, the retainer ring or the limiting bulges of the rotating shaft, so that the rotating shaft is prevented from moving in the axial direction.
In this embodiment, the ear plate 41 is a single piece, and the assembly of the ear plate 41 and the swing link 11 is simpler. In another embodiment, the ear plates 41 are two pieces and the swing link 11 is disposed between the two ear plates 41 as an alternative means in which the operation of the swing link 11 is more stable.
Referring to fig. 1, a first end of the deformation sensing section 21 is fixed to the swing member 1, and a second end of the deformation sensing section 21 is fixed to the fixing member 4 or the housing 3.
Specifically, the first end of the deformation induction section 21 is preferably adhered to the swinging component 1 through soft glue, and the second end of the deformation induction section 21 is preferably adhered to the fixing component 4 or the shell 3 through soft glue, so that the deformation induction section 21 can be bent or straightened along with the swinging of the swinging component 1.
With reference to fig. 1, the swing member 1 includes a swing link 11, one end of the swing link 11 is rotatably connected to the fixed member 4, for example, one end of the swing link 11 is connected to the fixed member 4 through a rotating pair; the first end of the deformation sensing section 21 can be fixed at one end of the swing link 11.
With continued reference to fig. 1, the swing member 1 further includes a pendulum 12, and the pendulum 12 is fixed to the other end of the swing rod 11. The pendulum 12 increases the mass of the other end of the rocker 11, and when the same acceleration is measured, the angle at which the rocker 11 having the pendulum 12 swings with respect to the rocker 11 not having the pendulum 12 is small, so that the pendulum 12 increases the detection range of the acceleration sensor. From another angle, when measuring same acceleration, pendulum 12 also makes the degree that deformation response section 21 single crooked diminish, and is corresponding for deformation response section 21 reduces because of the damage that the bending bore, thereby deformation response section 21's life is longer.
With continued reference to fig. 1, the strain sensitive section 21 is located at one end of the optical fiber 2; or, the deformation sensing section 21 is located in the middle of the optical fiber 2, and the end of the optical fiber 2 is fixed to the swing component 1.
In particular, where the deformation sensing section 21 is located at one end of the optical fiber 2, it is understood that: one end of the deformation sensing section 21 has a chance to directly contact an object other than the optical fiber 2; the location of the strain sensitive section 21 in the middle of the fiber 2 is understood to be: both ends of the deformation sensing section 21 are connected to other portions of the optical fiber 2, and cannot directly contact objects other than the optical fiber 2.
In this embodiment, fig. 1 illustrates that the deformation sensing section 21 is located in the middle of the optical fiber 2, and in addition, the optical fiber 2, except for the deformation sensing section 21, is respectively connected to two portions of the deformation sensing section 21, wherein one portion extends along the length direction of the rocker 11, preferably, the portion of the optical fiber 2 is fixed on the rocker 11, for example, the portion of the optical fiber 2 is tied to the rocker 11 through a rope, and the other portion preferably extends to the outside through a through hole of the housing 3.
Indeed, in other embodiments, as an alternative, the deformation sensing section 21 may be located at the end of the optical fiber 2, with other portions of the optical fiber 2 extending outwardly through the through hole of the housing 3.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. An acceleration sensor, characterized by comprising:
a swing member configured to swing freely;
the optical fiber comprises a deformation sensing section, wherein a first end of the deformation sensing section is set to be in a state of freely swinging along with the swinging component, and a second end of the deformation sensing section is set to be in a static state when the swinging component freely swings;
when the swinging component swings, the deformation induction section bends due to different states at two ends, so that an optical signal returned by the optical fiber changes.
2. The acceleration sensor of claim 1 further comprising a housing, the wobble member being disposed on the housing, the second end of the strain sensitive section being disposed stationary relative to the housing.
3. The acceleration sensor of claim 2, further comprising a stationary member fixedly attached to the housing, the pendulum member being rotatably attached to the stationary member.
4. The acceleration sensor of claim 3, wherein a first end of the deformation sensing section is fixedly connected to the swinging member, and a second end of the deformation sensing section is fixedly connected to the fixing member or the housing.
5. The acceleration sensor of claim 3, characterized in that the pendulum member comprises a pendulum, one end of which is pivotally connected to the stationary member.
6. The acceleration sensor of claim 5, characterized in that the pendulum member further comprises a pendulum that is fixedly connected to the other end of the pendulum rod.
7. The acceleration sensor of claim 3, characterized in that the fixing member includes an ear plate and a rotating shaft, and the swinging member is connected to the ear plate via the rotating shaft; wherein:
the ear plate is a single piece; or, the ear plates are two, and one end of the swinging component is positioned between the two ear plates.
8. The acceleration sensor of any one of claims 2-7, characterized in, that a deformation sensing section is located at one end of the optical fiber; alternatively, the first and second electrodes may be,
the deformation induction section is located in the middle of the optical fiber, and the end part of the optical fiber is fixedly connected to the swing component.
9. The acceleration sensor of any one of claims 2-7, characterized in, that the housing is provided with a through hole, through which the optical fiber extends.
10. The acceleration sensor of any one of claims 2-7, characterized in, that the deformation sensing section is a fiber grating.
CN202010044698.2A 2020-01-13 2020-01-13 Acceleration sensor Pending CN113125802A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010044698.2A CN113125802A (en) 2020-01-13 2020-01-13 Acceleration sensor
PCT/CN2021/071599 WO2021143742A1 (en) 2020-01-13 2021-01-13 Swing sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010044698.2A CN113125802A (en) 2020-01-13 2020-01-13 Acceleration sensor

Publications (1)

Publication Number Publication Date
CN113125802A true CN113125802A (en) 2021-07-16

Family

ID=76771605

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010044698.2A Pending CN113125802A (en) 2020-01-13 2020-01-13 Acceleration sensor

Country Status (1)

Country Link
CN (1) CN113125802A (en)

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Effective date of registration: 20220706

Address after: 201306 C, 888, west two road, Nanhui new town, Pudong New Area, Shanghai

Applicant after: Feixun sensor technology (Shanghai) Co.,Ltd.

Address before: 201307 2nd floor, building 2, 4766 Jiangshan Road, Nicheng Town, Pudong New Area, Shanghai

Applicant before: AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY Group