CN112826492A - Vibration sensor and medical imaging device - Google Patents
Vibration sensor and medical imaging device Download PDFInfo
- Publication number
- CN112826492A CN112826492A CN202011595876.7A CN202011595876A CN112826492A CN 112826492 A CN112826492 A CN 112826492A CN 202011595876 A CN202011595876 A CN 202011595876A CN 112826492 A CN112826492 A CN 112826492A
- Authority
- CN
- China
- Prior art keywords
- unit
- dimming
- signal
- optical
- light
- 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.)
- Granted
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- High Energy & Nuclear Physics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a vibration sensor and a medical imaging device. The vibration sensor includes: a mounting unit; a dimming unit movably disposed with respect to the mounting unit, the dimming unit being movable with respect to the mounting unit with vibration of the mounting unit; the optical unit is arranged corresponding to the dimming unit and can transmit an optical signal to the dimming unit and receive the optical signal reflected by the dimming unit; wherein the light signal reflected by the dimming unit is associated with an amount of movement of the mounting unit, the dimming unit adjusting the reflection of the corresponding light signal to the optical unit in response to vibration of the mounting unit. The vibration sensor is based on an optical principle, and acquires a vibration signal of a vibration source by acquiring a corresponding optical signal on a dimming unit related to the vibration source.
Description
Technical Field
The invention relates to the technical field of vibration sensors of medical equipment, in particular to a vibration sensor and medical imaging equipment.
Background
Medical imaging devices are usually subjected to relatively strong vibration during use, which generates relatively large noise on the one hand, and on the other hand, the long-term vibration puts higher demands on the mounting stability and reliability of other components in the magnetic resonance system.
The current medical imaging equipment has the characteristics of high magnetic field, high radio frequency field and the like. The existing electric vibration sensor applied to the medical imaging equipment is easy to generate larger interference signals due to the coupling of electronic devices or electric lead wires, so that the problems of signal acquisition distortion of the medical imaging equipment, even damage of the vibration sensor device and the like are easily caused, and further the running imaging quality and stability of the medical imaging equipment are influenced.
Disclosure of Invention
In view of the above, it is desirable to provide an improved vibration sensor and medical imaging apparatus. The vibration sensor is based on an optical principle, and acquires a vibration signal of a vibration source by acquiring a corresponding optical signal on a dimming unit related to the vibration source. The medical imaging equipment with the vibration sensor can take timely measures such as active noise reduction, part overhauling and the like after vibration signals of all positions in the medical imaging equipment are acquired, so that the medical imaging equipment can run more smoothly.
A vibration sensor, the vibration sensor comprising:
a mounting unit;
a dimming unit movably disposed with respect to the mounting unit, the dimming unit being movable with respect to the mounting unit with vibration of the mounting unit;
the optical unit is arranged corresponding to the dimming unit and can transmit an optical signal to the dimming unit and receive the optical signal reflected by the dimming unit;
wherein the light signal reflected by the dimming unit is associated with an amount of movement of the mounting unit, the dimming unit adjusting the reflection of the corresponding light signal to the optical unit in response to vibration of the mounting unit.
Further, the optical unit includes an incident signal optical fiber, a reflected signal optical fiber and a photoelectric conversion element, the incident signal optical fiber is used for transmitting an incident light signal to the dimming unit, and the reflected signal optical fiber is used for transmitting an optical signal reflected by the dimming unit to the photoelectric conversion element;
the photoelectric conversion element is connected to one end, away from the dimming unit, of the reflection signal optical fiber and converts an optical signal transmitted by the reflection signal optical fiber into an electric signal.
Furthermore, the incident signal optical fiber and the reflected signal optical fiber are both multiple, and the multiple incident signal optical fibers and the multiple reflected signal optical fibers are arranged in a bundle.
Furthermore, the optical unit includes a first end disposed toward the dimming unit, and the incident signal fibers and the reflected signal fibers at the first end are mixed and disposed at intervals.
Furthermore, one end of the incident light signals far away from the dimming unit and one end of the reflected signal optical fibers far away from the dimming unit are respectively arranged in a bundling manner.
Further, the optical unit comprises a first end arranged towards the dimming unit, the dimming unit is slidably arranged on the mounting unit, and when the dimming unit slides relative to the mounting unit, an effective reflection area projected on the end face of the first end by the dimming unit is correspondingly changed.
Further, the dimming unit comprises a light reflecting part and a light absorbing part, wherein the light reflecting part is used for reflecting the light signal, and the light absorbing part is used for inhibiting the reflection of the light signal;
the light reflecting part and the light absorbing part are arranged on the mounting unit in a sliding manner, and when the light reflecting part and the light absorbing part slide relative to the mounting unit, the area of the light reflecting part corresponding to the optical unit and the area of the light absorbing part corresponding to the optical unit are correspondingly changed;
the area of the light reflecting part corresponding to the optical unit and the area of the light absorbing part corresponding to the optical unit are effective reflection areas projected on the first end face by the light adjusting unit.
Further, the light reflecting portion and the light absorbing portion are arranged along a sliding direction of the light adjusting unit.
Furthermore, the vibration sensor further comprises an optical collimator disposed at the first end, the optical collimator is connected to one end of the incident signal fiber and the reflected signal fiber, which are relatively close to the dimming unit, and the optical collimator and the dimming unit are disposed opposite to each other.
Furthermore, the number of the dimming units is multiple, the optical units and the dimming units are arranged in a one-to-one correspondence manner, and the movement direction of each dimming unit relative to the mounting unit is different.
Further, the mounting unit is provided with a slide rail corresponding to the light adjusting unit, and each light adjusting unit is slidably arranged on the corresponding slide rail.
Further, the vibration sensor further comprises a reset unit, wherein the reset unit is respectively connected to the installation unit and the dimming unit and can reset the dimming unit to an initial position.
Further, the reset unit comprises a rigid body and an elastic piece, wherein the rigid body is fixed on the mounting unit and moves along with the mounting unit;
two ends of the elastic piece are respectively connected with the rigid body and the dimming unit;
when the mounting unit does not vibrate, the dimming unit gradually resets to an initial position under the action of the elastic piece and the rigid body.
One embodiment of the present invention provides a vibration sensor, which uses an optical principle as a basis to acquire a vibration signal of a vibration source by collecting a corresponding optical signal on a dimming unit related to the vibration source.
An embodiment of the invention also provides a medical imaging device comprising a vibration sensor as described in any of the above. The medical imaging apparatus has the vibration sensor described above. The medical imaging equipment can acquire the vibration signal of the internal vibration source through the vibration sensor to take corresponding measures, such as actively reducing noise of the vibration source, or monitoring the stability of the component through the acquired vibration signal, so as to guide the maintenance operation.
Drawings
FIG. 1 is a schematic structural diagram of a vibration sensor according to an embodiment of the present invention;
FIG. 2 is a schematic view of the vibration sensor shown in FIG. 1 with a housing omitted;
FIG. 3 is a schematic view of the vibration sensor shown in FIG. 2 from another perspective with some elements omitted;
FIG. 4 is a schematic diagram of the vibration sensor shown in FIG. 2 from another perspective with some elements omitted;
FIG. 5 is a schematic cross-sectional view of the vibration sensor of FIG. 4;
fig. 6 is a schematic structural view of an optical unit in the vibration sensor shown in fig. 1.
Description of the element reference numerals
100. A vibration sensor; 10. a mounting unit; 11. a housing; 12. a body; 121. mounting holes; 13. a slide rail; 14. a reset unit; 141. a rigid body; 142. an elastic member; 20. a dimming unit; 21. a light reflecting section; 22. a light absorbing portion; 30. an optical unit; 31. an incident signal optical fiber; 32. a reflected signal fiber; 33. a first end; 34. a second end; 35. an optical collimator.
The present invention is described in further detail with reference to the drawings and the detailed description.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The current medical imaging equipment has the characteristics of high magnetic field, high radio frequency field and the like. The existing electric vibration sensor applied to the medical imaging equipment is easy to generate larger interference signals due to the coupling of electronic devices or electric lead wires, so that the problems of signal acquisition distortion of the medical imaging equipment, even damage of the vibration sensor device and the like are easily caused, and further the running imaging quality and stability of the medical imaging equipment are influenced.
Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural diagram of a vibration sensor 100 according to an embodiment of the present invention; fig. 2 is a partial schematic structural view of the vibration sensor 100 shown in fig. 1, with the housing 11 omitted.
An embodiment of the present invention provides a vibration sensor 100 for detecting a vibration signal of a vibration source, so that a medical imaging device with the vibration source can take corresponding measures according to the vibration signal, for example, actively reduce noise of the vibration source, or monitor the stability of a component through the acquired vibration signal, thereby facilitating guidance of maintenance work.
The vibration sensor 100 includes a mounting unit 10, a dimming unit 20, and an optical unit 30. The mounting unit 10 is connected to a vibration source (not shown) and is capable of responding to vibrations of the vibration source; the dimming unit 20 is movably disposed with respect to the mounting unit 10 and moves accordingly by the vibration of the mounting unit 10, and the light signal reflected by the dimming unit 20 is related to the amount of movement of the mounting unit 10; the optical unit 30 faces and aligns the dimming unit 20, can transmit an optical signal to the dimming unit 20, and receive an optical signal reflected to the optical unit 30 by the dimming unit 20, and can convert the transmitted optical signal into an electrical signal. The mounting unit 10 is used for carrying the components such as the dimming unit 20 and the like and correspondingly vibrates along with the vibration source; the dimming unit 20 is used for responding to the vibration of the installation unit 10 and reflecting the corresponding light signal to the optical unit 30; the optical unit 30 is used for transmitting an optical signal to the dimming unit 20 and receiving an optical signal reflected by the dimming unit 20.
When the vibration source vibrates, the mounting unit 10 vibrates correspondingly with the vibration source; the dimming unit 20 responds to the vibration of the mounting unit 10 and moves correspondingly with respect to the mounting unit 10; the optical unit 30 transfers the optical signal to the dimming unit 20; then the light adjusting unit 20 adjusts the corresponding light signal and reflects the light signal to the optical unit 30; the optical unit 30 converts the light signal reflected by the dimming unit 20 into an electrical signal, and thus obtains the movement position of the dimming unit 20, thereby further obtaining the vibration signal of the vibration source.
It should be explained that: the dimming unit 20 adjusts the corresponding light signal and reflects the light signal to the optical unit 30 means: the dimming unit 20 moves to different positions in response to the vibration of the mounting unit 10, and the light signal reflected by the dimming unit 20 corresponding to the optical unit 30 changes according to the different moving positions of the dimming unit 20; the dimming unit 20 can move along a corresponding track in response to the vibration of the mounting unit 10, so that the vibration signal of the vibration source can be obtained from the light signal correspondingly reflected by the dimming unit 20.
In one embodiment, as shown in fig. 1, the mounting unit 10 includes a mounting member (not numbered) and a housing 11. The mounting piece is fixed in the shell 11; the housing 11 is fixed to a vibration source to be detected. The mounting member is used for movably setting the dimming unit 20; the housing 11 is configured to accommodate the mounting member, the dimming unit 20, and at least a part of the optical unit 30. At least a part of the optical unit 30 is fixedly mounted on the housing 11 such that one end surface of the optical unit 30 faces the dimming unit 20 disposed in the housing 11. So configured, it is convenient to integrally fix the vibration sensor 100 to the vibration source.
Preferably, the housing 11 is a substantially square hollow box. It is understood that in other embodiments, the housing 11 may be provided in other shapes, such as a sphere, according to the actual installation space, as long as it can be used to fix the mounting member, the dimming unit 20 and a part of the optical unit 30 and accommodate the vibration source.
The mounting member is fixed in the housing 11 and vibrates in response to the vibration of the housing 11. The mounting member includes a body 12 and a slide rail 13. The body 12 is fixed on the shell 11; the slide rail 13 is fixedly connected to the body 12 and is used for sliding connection with the dimming unit 20. The body 12 of the mounting piece is fixed on the shell 11 and can correspondingly vibrate along with the vibration source through the shell 11; at this time, the dimming unit 20 slidably coupled to the slide rail 13 moves along the slide rail 13 due to the inertia of the object itself, and the movement locus of the dimming unit 20 is related to the vibration of the mounting member.
It is understood that in some cases, the dimming unit 20 may be connected to the mounting member in other manners, such as the dimming unit 20 directly responding to the vibration of the body 12 in three dimensions, and the corresponding optical unit 30 can detect the corresponding light reflection area of the dimming unit 20, for example, the optical unit 30 of the dimming unit 20 is set to be a curved surface, and the corresponding dimming unit 20 is set to be a sphere, as long as the confirmation of the movement position of the dimming unit 20 can be achieved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the vibration sensor 100 shown in fig. 2 from another view after omitting some components.
As shown in fig. 2, the main body 12 is a substantially square box and is fixed in the square housing 11. Three sliding rails 13 are respectively arranged on three surfaces of the body 12, and the extending directions of the three sliding rails 13 are mutually vertical. Each slide rail 13 is provided with a light adjusting unit 20 along the extending direction of the corresponding slide rail 13. When the body 12 responds to the vibration of the vibration source through the housing 11, the driving action of the body 12 on the dimming unit 20 is actually decomposed into three dimming units 20 respectively sliding along the extending direction of the corresponding slide rail 13. The extending direction of the three slide rails 13 is the sliding direction of the three dimming units 20.
It is understood that, in other embodiments, the sliding rail 13 may be directly opened on the surface of the body 12, as long as the dimming unit 20 can slide along the corresponding sliding rail 13; and the extending directions of the three sliding rails 13 may be set at other included angles, for example, the included angle of two of the sliding rails 13 may be 60 °, as long as the light adjusting unit 20 can be correspondingly decomposed into three sliding directions corresponding to the vibration of the body 12. The shape of the body 12 can be set according to actual requirements, and is not limited in detail here.
In the present embodiment, if the slide rails 13 are directly provided on the housing 11, the main body 12 may be omitted accordingly, as long as the three light adjusting units 20 can slide along the corresponding slide rails 13.
Preferably, in order to enable the light adjusting unit 20 to be stably slidably connected to the slide rails 13, each of the slide rails 13 is provided with two parallel rails (not numbered) along the extending direction. With this arrangement, the sliding of the dimming cell 20 is not easily skewed. It can be understood that each slide rail 13 corresponds to one or more than three rails.
Referring to fig. 4 and 5, fig. 4 is a schematic structural view of the vibration sensor 100 shown in fig. 2 from another view after omitting some components; fig. 5 is a schematic cross-sectional view of the vibration sensor 100 shown in fig. 4.
In order to further enable the dimming unit 20 to return to the initial position when the vibration source does not vibrate, the vibration sensor 100 further includes a reset unit 14. The reset unit 14 is installed inside the mount and serves to reset the dimming unit 20 to an initial position. The restoring unit 14 includes a rigid body 141 and an elastic member 142. The rigid body 141 is fixed to the body 12 of the mounting member; both ends of the elastic member 142 are connected to the light control unit 20 and the rigid body 141, respectively. When the housing 11 and the mounting member correspondingly stop vibrating, the rigid body 141 responds to the mounting member in time and gradually resets the dimming unit 20 to the initial position through the elastic member 142.
In the present embodiment, as shown in fig. 3, the number of rigid bodies 141 is one; the elastic members 142 are provided corresponding to the dimming cells 20 and are three in number. The rigid body 141 has a rod-like structure with a sphere connected to an end of the rod. The three elastic members 142 are respectively disposed at regions corresponding to the spherical bodies of the rigid bodies 141 according to the positions of the dimming cells 20. Wherein, the body 12 is provided with a mounting hole 121 at a corresponding position (i.e. the middle position of the two rails) of the slide rail 13, and the mounting hole 121 extends along the direction of the slide rail 13. The mounting hole 121 is used for the elastic element 142 to penetrate through the body 12, and the elastic element 142 can move in the mounting hole 121 along the extending direction of the mounting hole 121, so that the dimming unit 20 can be reset under the action of the elastic element 142. By the arrangement, the reset unit 14 is simple in structure and low in cost; while enabling the three corresponding dimming cells 20 to be reset in time.
It is understood that in other embodiments, the structure of the rigid body 141 may be correspondingly configured according to actual requirements as long as it can be used for responding to the vibration of the mounting member and connecting the elastic member 142; the number of the elastic members 142 may be greater than the number of the dimming cells 20, and each dimming cell 20 may be correspondingly provided with two or more elastic members 142 according to actual requirements.
Preferably, the elastic member 142 is a spring. Due to the arrangement of the spring, the movement of the dimming unit 20 responding to the installation part is not easily influenced by the spring, and the production cost is low. It is understood that in other embodiments, the elastic member 142 may be another component that has elasticity and is easy to reset the dimming cell 20.
As shown in fig. 2 and 3, the dimming unit 20 is slidably disposed with respect to the mounting member such that the dimming unit 20 can respond to the vibration of the body 12, and the dimming units 20 are disposed in one-to-one correspondence with the optical units 30. This is so arranged that the optical unit 30 can acquire the movement position of each dimming cell 20.
The light control unit 20 includes a light reflecting portion 21 and a light absorbing portion 22. The light reflecting portion 21 and the light absorbing portion 22 are sleeved on the slide rail 13 along the sliding direction of the light adjusting unit 20, that is, the areas of the light reflecting portion 21 and the light absorbing portion 22 corresponding to the optical unit 30 are changed correspondingly during the sliding process. The light reflecting portion 21 is used to reflect an optical signal incident in an area corresponding to the optical unit 30. The light absorbing portion 22 serves to suppress reflection of the light signal in an area of the light absorbing portion 22 corresponding to the optical unit 30.
When the light reflecting portion 21 and the light absorbing portion 22 move along the slide rail 13 due to the vibration of the main body 12, the areas of the light reflecting portion 21 and the light absorbing portion 22 corresponding to the optical unit 30 are changed accordingly, the light signal reflected by the light reflecting portion 21 and the light absorbing portion 22 corresponding to the area of the optical unit 30 is transmitted to the optical unit 30, the light signal reflected correspondingly is converted into an electrical signal through the optical unit 30, and accordingly, the corresponding movement data of the light adjusting unit 20 is obtained, and accordingly, the vibration signal corresponding to the vibration source is obtained.
Referring to fig. 6, fig. 6 is a schematic structural diagram of the optical unit 30 in the vibration sensor 100 shown in fig. 1.
The optical unit 30 includes an incident signal fiber 31, a reflected signal fiber 32, and a photoelectric conversion element (not shown). One end of the incident signal fiber 31 and one end of the reflected signal fiber 32 face the dimming unit 20; the other end of the incident signal fiber 31 is connected to a light source, and the other end of the reflected signal fiber 32 is connected to a photoelectric conversion element. The incident signal optical fiber 31 is used for connecting a light source and transmitting an incident signal to the dimming unit 20; the reflected signal optical fiber 32 is used for transmitting the optical signal reflected by the dimming unit 20 to the photoelectric conversion element; the photoelectric conversion element is used for converting the optical signal transmitted by the reflected signal fiber 32 into an electrical signal.
In one embodiment, the optical unit 30 further includes a light source (not shown). The light source is connected to an end of the incident signal fiber 31 relatively distant from the dimming cell 20. The light source is used for emitting a light signal. The arrangement is such that the vibration sensor 100 is a relatively complete sensing device. It is understood that in other embodiments, the light source may be an external component as long as it can be implemented as the optical signal emitted by the incident signal fiber 31 of the optical unit 30.
Specifically, the number of the incident signal fibers 31 and the reflected signal fibers 32 is plural, and the plural incident signal fibers 31 and the reflected signal fibers 32 are arranged in a bundle. The end of the incident signal fiber 31 and the reflected signal fiber 32 relatively close to the dimming cell 20 is a first end 33, and the end of the incident signal fiber 31 and the reflected signal fiber 32 relatively far from the dimming cell 20 is a second end 34. A plurality of incident signal fibers 31 and reflected signal fibers 32 at the first end 33 are mixed with each other and arranged at intervals; a first end 33 formed by bundling the plurality of incident signal fibers 31 and reflected signal fibers 32 is fixed to the housing 11 and is disposed toward the light control unit 20. The plurality of incident signal optical fibers 31 and the plurality of reflected signal optical fibers 32 at the second end 34 are respectively arranged in a bundle, the plurality of incident signal optical fibers 31 are connected with the light source after being arranged in a bundle, and the plurality of reflected signal optical fibers 32 are connected with the photoelectric conversion element after being arranged in a technical manner.
It should be noted that:
the plurality of incident signal fibers 31 and reflected signal fibers 32 at the first end 33 are mixed and arranged at intervals: the incident signal fibers 31 and the reflected signal fibers 32 relatively close to the dimming cell 20 are uniformly mixed so that the number of the incident signal fibers 31 and the number of the reflected signal fibers 32 are equal in any one region of the end surface of the first end 33.
The bundling arrangement of the incident signal fibers 31 and the reflected signal fibers 32 at the second end 34 refers to: the ends of the incident signal fibers 31 and the reflected signal fibers 32, which are relatively far away from the dimming unit 20, are not separately arranged, but the light beams of the incident signal fibers 31 and the reflected signal fibers 32 are completely separated, so that the incident signal fibers 31 and the reflected signal fibers 32 are respectively connected with the light source and the photoelectric conversion element.
The light reflecting portion 21 is used to reflect the optical signal of the corresponding incident signal fiber 31 to the reflected signal fiber 32. The light absorbing portion 22 suppresses reflection of the optical signal of the corresponding incident signal fiber 31. The area of the light reflecting portion 21 corresponding to the incident signal fiber 31 is the number of the incident signal fibers 31 corresponding to the projection of the light reflecting portion 21 on the end surface of the first end 33, and the light signal transmitted by the incident signal fiber 31 included in the area can be reflected to the reflected signal fiber 32 by the light reflecting portion 21. The area of the light absorption portion 22 corresponding to the incident signal fiber 31 is the number of the incident signal fibers 31 corresponding to the projection of the light absorption portion 22 on the end face of the first end 33, and the light signal of the incident signal fiber 31 in the area is absorbed by the light absorption portion 22 and is not reflected to the reflection signal fiber 32.
With this arrangement, the incident light signal of any one region of the first end 33 can be uniformly transmitted to the light modulation unit 20, so that when the areas of the light reflecting portion 21 and the light absorbing portion 22 of the light modulation unit 20 corresponding to the end surfaces of the first end 33 are correspondingly changed, the incident light signal is uniformly distributed, so that the incident light signal of the light reflecting portion 21 and the light absorbing portion 22 is also correspondingly changed along with the area change. The light signals reflected by the light reflecting portion 21 and the light absorbing portion 22 are related to the incident light signals, and the reflected light signals can be correspondingly transmitted to the photoelectric conversion element through the reflected signal optical fibers 32 correspondingly and uniformly distributed at the first end 33. The light signal at the first end 33 can be fed back to the movement position of the light adjusting unit 20 accurately.
The area of the light reflecting portion 21 corresponding to the incident signal fiber 31 and the area of the light absorbing portion 22 corresponding to the incident signal fiber 31 are effective reflection areas projected from the end surface of the first end 33 by the light adjusting unit 20. The photoelectric conversion element obtains a motion signal of the dimming unit 20 according to the light signal transmitted in real time in the effective reflection region. Since the movement of the dimming cell 20 is linked to the vibration source through the mounting and the housing 11. Therefore, a vibration signal of the vibration source can be acquired by the vibration sensor 100.
The dimming cell 20 corresponds to the arrangement of the effective reflection area of the optical unit 30, and is exemplified by fig. 3, but is not limited to the embodiment of fig. 3. The end face of the first end 33 is substantially circular; the side of the light adjusting unit 20 facing the first end 33 is substantially rectangular, and the dimension of the light adjusting unit 20 in the length direction is larger than the diameter of the end surface of the first end 33, and the dimension of the light adjusting unit 20 in the width direction can be set according to the requirement, as long as the areas of the light reflecting portion 21 and the light absorbing portion 22 corresponding to the end surface of the first end 33 can be changed along with the movement of the light adjusting unit 20.
When the light adjusting unit 20 is located at the initial position, the areas of the end surfaces of the light reflecting portion 21 and the light absorbing portion 22 corresponding to the first end 33 are equal, that is, the number of the light reflecting portion 21 corresponding to the incident signal optical fiber 31 and the number of the light absorbing portion 22 corresponding to the incident signal optical fiber 31 are equal. When the dimming cell 20 is deviated from the initial position in response to the vibration of the mounting member, the areas of the end surfaces of the light reflecting portion 21 and the light absorbing portion 22 corresponding to the first end 33 are changed accordingly. For example, when the light reflecting portion 21 and the light absorbing portion 22 move along the direction of arrow F in fig. 3, the area of the end surface of the light reflecting portion 21 corresponding to the first end 33 increases and then decreases, and the area of the end surface of the light absorbing portion 22 corresponding to the first end 33 continuously decreases, so that the light signal reflected by the light reflecting portion 21 and the light absorbing portion 22 changes with the change of the movement position, and the movement signal of the light adjusting unit 20 is obtained by the reflected light signal.
It is understood that, in other manners, the shape of the end surface of the first end 33 and the shapes of the light reflecting portion 21 and the light absorbing portion 22 in the light adjusting unit 20 may be set according to actual requirements, as long as the area of the corresponding effective reflection area can be changed correspondingly during the movement of the light adjusting unit 20; even, the light absorbing part 22 may not be provided, for example, the end face of the first end 33 having a circular shape and the light reflecting part 21 having a regular triangle shape inscribed in the circular shape, as long as the effective reflection area corresponding to the light reflecting part 21 can be changed accordingly during the movement.
In one embodiment, the optical unit 30 further comprises a light collimator 35 arranged at the first end 33. The optical collimator 35 connects one end of the incident signal fiber 31 and the reflected signal fiber 32 relatively close to the dimming cell 20. The first end 33 is fixed to the housing 11 by means of an optical collimator 35. The optical collimator 35 is used to collimate the incident optical signal so that the optical signal can be vertically incident to the dimming cell 20. With this arrangement, the optical signal transmitted by the incident signal fiber 31 aligned with the end surface of the first end 33 of the light modulation unit 20 can be incident on the light modulation unit 20, so as to avoid the optical signal corresponding to the end surface of the first end from scattering to the outside of the light modulation unit 20, and further improve the accuracy of the vibration sensor 100.
One embodiment of the present invention provides a vibration sensor, which uses an optical principle as a basis to acquire a vibration signal of a vibration source by collecting a corresponding optical signal on a dimming unit related to the vibration source.
An embodiment of the present invention also provides a medical imaging apparatus (not shown) having the vibration sensor described above. The medical imaging equipment can acquire the vibration signal of the internal vibration source through the vibration sensor to take corresponding measures, such as actively reducing noise of the vibration source, or monitoring the stability of the component through the acquired vibration signal, so as to guide the maintenance operation.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A vibration sensor, characterized in that the vibration sensor comprises:
a mounting unit;
a dimming unit movably disposed with respect to the mounting unit, the dimming unit being movable with respect to the mounting unit with vibration of the mounting unit;
the optical unit is arranged corresponding to the dimming unit and can transmit an optical signal to the dimming unit and receive the optical signal reflected by the dimming unit;
wherein the light signal reflected by the dimming unit is associated with an amount of movement of the mounting unit, the dimming unit adjusting the reflection of the corresponding light signal to the optical unit in response to vibration of the mounting unit.
2. The vibration sensor according to claim 1, wherein the optical unit includes an incident signal optical fiber for transmitting an incident light signal to the dimming unit, a reflected signal optical fiber for transmitting an optical signal reflected by the dimming unit to the photoelectric conversion element, and a photoelectric conversion element;
the photoelectric conversion element is connected to one end, away from the dimming unit, of the reflection signal optical fiber and converts an optical signal transmitted by the reflection signal optical fiber into an electric signal.
3. The vibration sensor according to claim 2, wherein the incident signal fiber and the reflected signal fiber are plural, and the plural incident signal fibers and the reflected signal fibers are bundled.
4. The vibration sensor according to claim 3, wherein the optical unit includes a first end disposed toward the dimming unit, and the incident signal fibers and the reflected signal fibers at the first end are mixed and disposed in a spaced arrangement.
5. The vibration sensor according to claim 3, wherein a plurality of ends of the incident optical fibers away from the dimming unit and a plurality of ends of the reflected optical fibers away from the dimming unit are respectively bundled.
6. The vibration sensor according to claim 1, wherein the optical unit includes a first end disposed toward the dimming unit, the dimming unit is slidably disposed on the mounting unit, and an effective reflection area of the dimming unit projected on the end surface of the first end is changed when the dimming unit slides relative to the mounting unit.
7. The vibration sensor according to claim 6, wherein the light adjusting unit includes a light reflecting portion for reflecting the light signal and a light absorbing portion for suppressing reflection of the light signal;
the light reflecting part and the light absorbing part are arranged on the mounting unit in a sliding manner, and when the light reflecting part and the light absorbing part slide relative to the mounting unit, the area of the light reflecting part corresponding to the optical unit and the area of the light absorbing part corresponding to the optical unit are correspondingly changed;
the area of the light reflecting part corresponding to the optical unit and the area of the light absorbing part corresponding to the optical unit are effective reflection areas projected on the first end face by the light adjusting unit.
8. The vibration sensor according to claim 7, wherein the light reflecting portion and the light absorbing portion are arranged in line along a sliding direction of the light adjusting unit.
9. The vibration sensor according to claim 4, further comprising a light collimator disposed at the first end, wherein the light collimator connects the incident signal fiber and the reflected signal fiber to an end relatively close to the light adjusting unit, and the light collimator is disposed opposite to the light adjusting unit.
10. The vibration sensor according to claim 1, wherein the number of the dimming cells is plural, the optical cells are provided in one-to-one correspondence with the dimming cells, and a moving direction of each of the dimming cells with respect to the mounting unit is different.
11. The vibration sensor according to claim 10, wherein the mounting unit is provided with a slide rail corresponding to the dimming units, each of the dimming units being slidably provided to the corresponding slide rail.
12. The vibration sensor according to claim 1, further comprising a reset unit connected to the mounting unit and the dimming unit, respectively, and capable of resetting the dimming unit to an initial position.
13. The vibration sensor according to claim 12, wherein the reset unit includes a rigid body and an elastic member, the rigid body being fixed to the mounting unit and moving with the mounting unit;
two ends of the elastic piece are respectively connected with the rigid body and the dimming unit;
when the mounting unit does not vibrate, the dimming unit gradually resets to an initial position under the action of the elastic piece and the rigid body.
14. A medical imaging device, characterized in that it comprises a vibration sensor according to any of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595876.7A CN112826492B (en) | 2020-12-29 | 2020-12-29 | Vibration sensor and medical imaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595876.7A CN112826492B (en) | 2020-12-29 | 2020-12-29 | Vibration sensor and medical imaging apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112826492A true CN112826492A (en) | 2021-05-25 |
| CN112826492B CN112826492B (en) | 2023-08-08 |
Family
ID=75925183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011595876.7A Active CN112826492B (en) | 2020-12-29 | 2020-12-29 | Vibration sensor and medical imaging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112826492B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07198471A (en) * | 1993-12-29 | 1995-08-01 | Anritsu Corp | Vibration source position detector |
| JP2008157759A (en) * | 2006-12-25 | 2008-07-10 | Sun Tec Kk | Optical fiber sensor system |
| CN201749538U (en) * | 2010-07-19 | 2011-02-16 | 重庆华渝电气仪表总厂 | Alarm device with vibration sensor |
| US20110279275A1 (en) * | 2010-05-17 | 2011-11-17 | National Sun Yat-Sen University | Wireless detection apparatus and method |
| CN103575380A (en) * | 2013-11-04 | 2014-02-12 | 南京五石金传感技术有限公司 | Optical fiber vibration sensor based on fluorescence method, vibration sensing method and system |
| JP2014233174A (en) * | 2013-05-30 | 2014-12-11 | 株式会社ニコン | Drive device for vibration wave motor, optical equipment, and drive method for vibration wave motor |
| CN104490364A (en) * | 2014-12-30 | 2015-04-08 | 李俊 | Optical fiber finger for detecting flexibility of prostate and detection method |
| CN106680536A (en) * | 2016-10-20 | 2017-05-17 | 吉林大学 | High-sensitivity single polarization-maintaining fiber interference type acceleration speed sensing system |
| CN109029688A (en) * | 2018-08-06 | 2018-12-18 | 中国科学院电子学研究所 | Sensitizing type fibre-optical acoustic sensor probe and its sensitization structure |
| CN109334715A (en) * | 2018-10-24 | 2019-02-15 | 西南交通大学 | A kind of optical fiber orbit occupancy monitoring system and method based on vibration measurement |
| TW201913219A (en) * | 2017-08-22 | 2019-04-01 | 英屬開曼群島商音飛光電科技股份有限公司 | Optical touch device |
| CN109770854A (en) * | 2019-02-02 | 2019-05-21 | 东北大学秦皇岛分校 | Human body physical sign information monitoring system based on Fibre Optical Sensor |
| WO2019239536A1 (en) * | 2018-06-13 | 2019-12-19 | 株式会社日立製作所 | Device for measuring speed of moving body, and elevator |
| CN111272273A (en) * | 2020-04-20 | 2020-06-12 | 深圳市特发信息股份有限公司 | Multi-line optical fiber vibration information scanning real-time monitoring equipment |
| JP2020095114A (en) * | 2018-12-11 | 2020-06-18 | 株式会社日立製作所 | Optical scanner and optical scanning method |
| CN211381310U (en) * | 2019-12-09 | 2020-09-01 | 飞巽传感技术(上海)有限公司 | Vibration sensor and pulse measurement system |
-
2020
- 2020-12-29 CN CN202011595876.7A patent/CN112826492B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07198471A (en) * | 1993-12-29 | 1995-08-01 | Anritsu Corp | Vibration source position detector |
| JP2008157759A (en) * | 2006-12-25 | 2008-07-10 | Sun Tec Kk | Optical fiber sensor system |
| US20110279275A1 (en) * | 2010-05-17 | 2011-11-17 | National Sun Yat-Sen University | Wireless detection apparatus and method |
| CN201749538U (en) * | 2010-07-19 | 2011-02-16 | 重庆华渝电气仪表总厂 | Alarm device with vibration sensor |
| JP2014233174A (en) * | 2013-05-30 | 2014-12-11 | 株式会社ニコン | Drive device for vibration wave motor, optical equipment, and drive method for vibration wave motor |
| CN103575380A (en) * | 2013-11-04 | 2014-02-12 | 南京五石金传感技术有限公司 | Optical fiber vibration sensor based on fluorescence method, vibration sensing method and system |
| CN104490364A (en) * | 2014-12-30 | 2015-04-08 | 李俊 | Optical fiber finger for detecting flexibility of prostate and detection method |
| CN106680536A (en) * | 2016-10-20 | 2017-05-17 | 吉林大学 | High-sensitivity single polarization-maintaining fiber interference type acceleration speed sensing system |
| TW201913219A (en) * | 2017-08-22 | 2019-04-01 | 英屬開曼群島商音飛光電科技股份有限公司 | Optical touch device |
| WO2019239536A1 (en) * | 2018-06-13 | 2019-12-19 | 株式会社日立製作所 | Device for measuring speed of moving body, and elevator |
| CN109029688A (en) * | 2018-08-06 | 2018-12-18 | 中国科学院电子学研究所 | Sensitizing type fibre-optical acoustic sensor probe and its sensitization structure |
| CN109334715A (en) * | 2018-10-24 | 2019-02-15 | 西南交通大学 | A kind of optical fiber orbit occupancy monitoring system and method based on vibration measurement |
| JP2020095114A (en) * | 2018-12-11 | 2020-06-18 | 株式会社日立製作所 | Optical scanner and optical scanning method |
| CN109770854A (en) * | 2019-02-02 | 2019-05-21 | 东北大学秦皇岛分校 | Human body physical sign information monitoring system based on Fibre Optical Sensor |
| CN211381310U (en) * | 2019-12-09 | 2020-09-01 | 飞巽传感技术(上海)有限公司 | Vibration sensor and pulse measurement system |
| CN111272273A (en) * | 2020-04-20 | 2020-06-12 | 深圳市特发信息股份有限公司 | Multi-line optical fiber vibration information scanning real-time monitoring equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112826492B (en) | 2023-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102597832B (en) | Expanded beam interface device and method for fabricating same | |
| US10031212B2 (en) | Object detection device and remote sensing apparatus | |
| EP2787382A2 (en) | Optical device and module for light transmission and attenuation | |
| US9006643B2 (en) | Photoelectric converter with optical signal splitting holes for reflecting optical signals to monitor | |
| CN102621558A (en) | Laser radar visibility meter and transceiving coaxial optical system thereof | |
| CN105043525A (en) | Laser speckle-based vibration information detection method | |
| JPH0277626A (en) | Fiber optical vibration sensor | |
| US5812251A (en) | Electro-optic strain gages and transducer | |
| CN110487239A (en) | Boiler expansion on-line monitoring system | |
| CN105043524B (en) | A kind of method for detecting vibration based on the imaging of laser speckle defocus | |
| CN112826492B (en) | Vibration sensor and medical imaging apparatus | |
| CN103885133A (en) | Optical communication device | |
| CN112197852A (en) | Device and method for measuring vibration of generator stator winding | |
| CN203216701U (en) | Aberration detection device for image transmitting optical fiber bundles | |
| CN115355829B (en) | Displacement measurement device and displacement measurement method for shock insulation support | |
| CN111896939A (en) | Laser radar light source detection device | |
| CN112857206A (en) | Laser interferometer, optical system thereof, detection method and deflection detection equipment | |
| CN104792879A (en) | Anti-collision device in longitudinal direction of ultrasonic probe | |
| CN109975947A (en) | Reference planes mirror bogey and laser interference detection device | |
| DK2680463T3 (en) | Signal reflection device for an optical feedback test | |
| CN216013646U (en) | Laser radar receiving and dispatching module and range finding equipment | |
| CN204536274U (en) | A kind of collision avoidance system of ultrasonic probe Vertical dimension | |
| US11854219B2 (en) | Photosensor processing for improved line scanner performance | |
| US20120097843A1 (en) | Photoelectric encoder and photoelectric encoder system | |
| CN101105530A (en) | Wave ranging device with guiding passage |
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 |