CN220399233U - Metal measurement optical fiber sensor based on micro-vibration - Google Patents
Metal measurement optical fiber sensor based on micro-vibration Download PDFInfo
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- CN220399233U CN220399233U CN202320778694.6U CN202320778694U CN220399233U CN 220399233 U CN220399233 U CN 220399233U CN 202320778694 U CN202320778694 U CN 202320778694U CN 220399233 U CN220399233 U CN 220399233U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 35
- 239000002184 metal Substances 0.000 title claims abstract description 35
- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 230000004888 barrier function Effects 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 229920000271 Kevlar® Polymers 0.000 claims description 2
- 229910002065 alloy metal Inorganic materials 0.000 claims description 2
- 239000004761 kevlar Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a metal measurement optical fiber sensor based on micro-vibration, which can obtain relevant parameters of measured metal more sensitively and accurately. The key points of the technical scheme are as follows: the optical fiber sensor is arranged in the detection host, the sensing probe comprises a test shell, and an optical path light emitting connector, a micro vibration light barrier, a micro vibration connecting structure and a reflecting mirror which are arranged in the test shell, wherein the micro vibration light barrier is arranged in the test shell in a suspending mode through the micro vibration connecting structure, the optical path light emitting connector comprises an emitting optical fiber and a receiving optical fiber, an optical through hole is formed in the micro vibration light barrier, and light emitted by the emitting optical fiber irradiates the reflecting mirror through the optical through hole and is reflected by the reflecting mirror to enter the receiving optical fiber through the optical through hole again. The measured metal vibrates to cause the micro-vibration light barrier and the test shell to vibrate relatively, the light throughput passing through the light through hole is changed, and the detecting host calculates the measured metal parameters through the light throughput.
Description
Technical Field
The utility model relates to an optical fiber sensing technical instrument, in particular to a metal measuring optical fiber sensor based on micro-vibration.
Background
By measuring the micro-vibration characteristics of the metal, parameters such as Young's modulus, linear expansion coefficient, resonant frequency and the like of the metal can be obtained, and an effective means is provided for solving the isolation of low-frequency vibration and noise in the field of mechanical manufacturing, especially precision mechanical manufacturing. The vibration active control means that a control system is used for inhibiting mechanical vibration, and a control method of externally inputting energy is adopted according to the dynamic characteristics of a controlled system so as to realize vibration reduction of the controlled system.
The key to active control of vibration is to ensure the accuracy of the sensor to the measurement of the vibration signal. Because the optical fiber sensor has the advantages of being passive, strong in anti-interference capability, high in precision and the like, the optical fiber sensor widely applied to vibration measurement can be divided into a phase modulation type, a wavelength modulation type, an intensity modulation type, a polarization state modulation type, a mode modulation type and the like. However, the conventional optical fiber sensor for measuring metal has the defects of low sensitivity and poor measurement accuracy, is easily interfered by the outside during use, and the vibration of the measured metal is greatly damaged when being transmitted to the probe, so that the deviation of the measurement result is large.
Disclosure of Invention
The utility model aims to solve the problems in the background art and provides a metal measuring optical fiber sensor based on micro-vibration, which can sense the vibration of the measured metal more sensitively, receive the influence of reflected light to an optical fiber through the vibration, and acquire the related parameters of the measured metal through calculating the change of the optical characteristic parameters.
In order to achieve the above object, the present utility model adopts the following technical scheme:
the metal measurement optical fiber sensor based on micro-vibration comprises a detection host, a sensing probe and an optical fiber cable, wherein the optical fiber sensor is arranged in the detection host, and the sensing probe is connected with the detection host through the optical fiber cable; the sensing probe comprises a test shell, a light path joint, a micro-vibration light barrier, a micro-vibration connecting structure and a reflecting mirror, wherein the light path joint, the micro-vibration light barrier, the micro-vibration connecting structure and the reflecting mirror are arranged in the test shell in a suspending way through the micro-vibration connecting structure, the micro-vibration light barrier is positioned between the light path joint and the reflecting mirror, the light path joint comprises an emitting optical fiber and a receiving optical fiber, the micro-vibration light barrier is provided with a light through hole, light emitted by the emitting optical fiber irradiates the reflecting mirror through the light through hole and is reflected by the reflecting mirror and enters the receiving optical fiber through the light through hole again,
when measuring metal, the test shell contacts the measured metal, so that the micro-vibration light barrier and the test shell vibrate relatively, the light throughput passing through the light through hole is changed, and the detection host calculates the parameter of the measured metal through the light throughput.
Further preferably, the detecting host is provided with a plurality of modems, the number of the light path luminous joints is the same as that of the light path luminous joints, the micro-vibration light barrier is provided with light through holes, the plurality of light path luminous joints and the light through holes are coaxially arranged in one-to-one correspondence, and all the light path luminous joints are respectively connected to the modems through independent optical fiber lines.
Further preferably, one of the light through holes is located at the center of the micro-vibration light barrier, and the rest of the light through holes are circumferentially and equiangularly arranged around the light through holes in the center of the micro-vibration light barrier, and the distribution arrangement mode of the light path luminous joints corresponds to the distribution arrangement mode of the light through holes.
Further preferably, the test housing is internally provided with a vibration chamber for providing space for the micro-vibration light barrier to vibrate, the two end parts of the vibration chamber form a pedestal, the micro-vibration connecting structure comprises at least two supporting cables, the supporting cables penetrate through the micro-vibration light barrier and are respectively connected to the pedestals at the two end parts of the vibration chamber, the micro-vibration light barrier is fixedly connected with the supporting cables, and the supporting cables support the micro-vibration light barrier to be suspended in the vibration chamber.
Still preferably, the inside mirror seat that still is equipped with of test casing, the speculum is fixed to be located on the mirror seat, and the speculum covers all light through-holes at axial direction's projection, and the mirror seat is provided with the hole of stepping down that supplies every supporting cable to pass one by one.
Further preferably, the number of the supporting cables is at least three, the supporting cables are arranged around the axis of the micro-vibration light barrier and close to the edge of the micro-vibration light barrier at equal angles, and the supporting cables are made of nylon fiber windings, kevlar fiber windings or alloy metal wires windings.
Further preferably, the sensing probe is further provided with a separation type handle, the separation type handle is located at the rear end part of the test shell, and a buffer connection seat is arranged between the separation type handle and the test shell.
Compared with the prior art, the metal measuring optical fiber sensor based on micro-vibration adopting the technical scheme has the following beneficial effects:
1. the micro-vibration light barrier is suspended in the vibration chamber through the supporting cable made of the multi-heeled high-strength nylon fibers, when the test shell contacts with the tested metal of micro-vibration, the suspended micro-vibration light barrier and the test shell are more prone to generate relative vibration deviation, so that the change of the light throughput of the receiving and reflecting optical fiber is more prone to be detected, and the sensitivity is measured.
2. Through a plurality of light path connectors and set up a plurality of light through-holes at little the vibration barrier, can acquire multiunit measurement data simultaneously when measuring, detect the host computer and synthesize multiunit measurement parameter and calculate the correction, can make measuring result reach higher accuracy nature, reduce the measurement deviation.
3. When in measurement, the separated handle is clamped or held, so that the test shell is propped against the tested metal, the micro vibration of the tested metal is transmitted to the test shell, and the buffer connecting seat arranged between the test shell and the separated handle can reduce the obstruction of external force to the vibration of the test shell, reduce the vibration transmission loss and further improve the measurement accuracy.
Drawings
FIG. 1 is a schematic diagram of a metal fiber optic sensor based on micro-vibration according to an embodiment of the present utility model.
Fig. 2 is a schematic view of the appearance structure of the sensing probe in this embodiment.
Fig. 3 is a schematic diagram of the internal structure of the test housing in this embodiment.
Fig. 4 is a schematic structural diagram of the micro-vibration light barrier in the present embodiment.
Fig. 5 and 6 are schematic perspective views of the inside of the test housing according to the present embodiment.
Fig. 7 is a schematic diagram of the measurement principle of the present embodiment.
Reference numerals: 1. detecting a host; 2. a sensing probe; 20. a test housing; 201. a lens base; 2010. a relief hole; 202. a carrier; 21. a split handle; 22. a buffer connection seat; 3. an optical fiber cable; 4. an optical path send-out connector; 40. an emission optical fiber; 41. receiving an optical fiber; 5. a micro-vibration light barrier; 50. an optical through hole; 6. a support cable; 7. a reflecting mirror.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
The metal measuring optical fiber sensor based on micro vibration as shown in fig. 1-7 comprises a detection host 1, a sensing probe 2 and an optical fiber cable 3, wherein the optical fiber sensor and a modem are arranged in the detection host 1, the sensing probe 2 is connected with the detection host 1 through the optical fiber cable 3, and the detection host 1 is connected with a computer control system.
The sensing probe 2 comprises a test shell 20, a separation type handle 21, and optical path hair-up joints 4, micro-vibration light barriers 5, micro-vibration connecting structures and reflectors 7 which are arranged in the test shell 20, wherein the number of the optical path hair-up joints 4 is nine, a carrying seat 202 for carrying the optical path hair-up joints 4 is arranged in the test shell 20, the nine optical path hair-up joints 4 are distributed on the carrying seat 202, one optical path hair-up joint 4 is positioned in the center of the carrying seat 202, and the rest optical path hair-up joints 4 are circumferentially and equiangularly arranged around the center of the carrying seat 202; the separation type handle 21 is located at the rear end part of the test shell 20, a buffer connecting seat 22 is arranged between the separation type handle 21 and the test shell 20, and the buffer connecting seat 22 is made of silicon rubber.
The test shell 20 is internally provided with a vibration chamber for providing space for the micro-vibration light barrier 5 to vibrate, the micro-vibration light barrier 5 is suspended in the test shell 20 through a micro-vibration connecting structure, the micro-vibration light barrier 5 is positioned between the light path joint 4 and the reflecting mirror 7, two end parts of the vibration chamber form a pedestal, the micro-vibration connecting structure comprises four supporting cables 6, the supporting cables 6 are wound and coiled by nylon fibers, the supporting cables 6 penetrate through the micro-vibration light barrier 5 and are respectively connected to the pedestals at two end parts of the vibration chamber, the four supporting cables 6 are arranged on the micro-vibration light barrier 5 in a positive cross shape, the distances between the four supporting cables 6 and the center of the micro-vibration light barrier 5 are the same, the micro-vibration light barrier 5 is fixedly connected with the supporting cables 6, and the supporting cables 6 support the micro-vibration light barrier 5 and suspend in the vibration chamber. Nine light through holes 50 are formed in the micro-vibration light barrier 5, one light through hole 50 is located in the center of the micro-vibration light barrier 5, and the rest of light through holes 50 are arranged around the light through hole 50 in the center of the micro-vibration light barrier 5 at equal angles in the circumferential direction.
The inside mirror seat 201 that still is equipped with of test casing 20, mirror 7 are fixed to be located on the mirror seat 201, and the projection of mirror 7 in axial direction covers all light through-holes 50, and mirror seat 201 is provided with four holes 2010 of stepping down, and four holes 2010 and every support cable 6 one-to-one set up, and four support cables 6 pass four holes 2010 of stepping down one by one, and the hole 2010 of stepping down provides the space for the vibration beat of support cable 6.
The optical path emitting connectors 4 and the optical through holes 50 are coaxially arranged in a one-to-one correspondence manner, all the optical path emitting connectors 4 are respectively connected to the modems through independent optical fiber circuits, the optical fiber circuits are arranged in the optical fiber cable 3, the optical path emitting connectors 4 comprise emitting optical fibers 40 and receiving optical fibers 41, and light rays emitted by the emitting optical fibers 40 irradiate on the reflecting mirror 7 through the optical through holes 50 and are reflected by the reflecting mirror 7 and enter the receiving optical fibers 41 through the optical through holes 50 again. When measuring metal, the separated handle 21 is clamped by a clamping tool or held by hand, so that the test shell 20 is propped against the metal to be measured, and the micro vibration of the metal to be measured is transmitted to the test shell 20, so that the micro vibration light barrier 5 and the test shell 20 vibrate relatively, the light throughput passing through the light through hole 50 is changed, and the detection host 1 calculates the parameter of the metal to be measured through the light throughput.
The foregoing is a preferred embodiment of the present utility model, and it will be apparent to those skilled in the art that variations and modifications can be made without departing from the principles of the utility model, and these should also be considered as being within the scope of the utility model.
Claims (7)
1. The utility model provides a metal measurement fiber sensor based on micro-vibration which characterized in that: the detection device comprises a detection host (1), a sensing probe (2) and an optical fiber cable (3), wherein an optical fiber sensor is arranged in the detection host (1), and the sensing probe (2) is connected with the detection host (1) through the optical fiber cable (3); the sensing probe (2) comprises a test shell (20) and a light path sending out head (4), a micro-vibration light barrier (5), a micro-vibration connecting structure and a reflecting mirror (7) which are arranged in the test shell (20), wherein the micro-vibration light barrier (5) is arranged in the test shell (20) in a suspending mode through the micro-vibration connecting structure, the micro-vibration light barrier (5) is arranged between the light path sending out head (4) and the reflecting mirror (7), the light path sending out head (4) comprises an emitting optical fiber (40) and a receiving optical fiber (41), a light through hole (50) is formed in the micro-vibration light barrier (5), and light emitted by the emitting optical fiber (40) irradiates on the reflecting mirror (7) through the light through hole (50) and is reflected by the reflecting mirror (7) to enter the receiving optical fiber (41) again through the light through hole (50).
2. The micro-vibration based metal measurement fiber optic sensor of claim 1, wherein: the detection host (1) is provided with a plurality of modems, the number of the light path luminous joints (4) is the same as the number of the light path luminous joints (4), the light path luminous joints (4) and the light through holes (50) are coaxially arranged in a one-to-one correspondence manner, and all the light path luminous joints (4) are respectively connected to the modems through independent optical fiber lines.
3. The micro-vibration based metal measurement fiber optic sensor of claim 2, wherein: one of the light through holes (50) is positioned at the central part of the micro-vibration light barrier (5), the rest of the light through holes (50) are arranged around the circumference of the light through holes (50) at the center of the micro-vibration light barrier (5) at equal angles, and the distribution arrangement mode of the light path luminous joints (4) corresponds to the distribution arrangement mode of the light through holes (50).
4. A micro-vibration based metal measurement fiber optic sensor according to claim 1 or 2 or 3, wherein: the test shell (20) is internally provided with a vibrating chamber for providing space for the micro-vibration light barrier (5) to vibrate, the two end parts of the vibrating chamber form a pedestal, the micro-vibration connecting structure comprises at least two supporting cables (6), the supporting cables (6) penetrate through the micro-vibration light barrier (5) and are respectively connected to the pedestals at the two end parts of the vibrating chamber at the two ends, the micro-vibration light barrier (5) is fixedly connected with the supporting cables (6), and the supporting cables (6) support the micro-vibration light barrier (5) to be suspended in the vibrating chamber.
5. The micro-vibration based metal measurement fiber optic sensor of claim 4, wherein: the inside mirror seat (201) that still is equipped with of test casing (20), mirror (7) are fixed to be located on mirror seat (201), and all light through-holes (50) are covered in the projection of mirror (7) on axial direction, and mirror seat (201) are provided with and supply every support cable (6) to pass one by one hole (2010) of stepping down.
6. The micro-vibration based metal measurement fiber optic sensor of claim 4, wherein: the number of the supporting cables (6) is at least three, the supporting cables (6) encircle the axis of the micro-vibration light barrier (5) and are close to the edge of the micro-vibration light barrier (5) at equal angles, and the supporting cables (6) are made of nylon fiber winding, kevlar fiber winding or alloy metal wire winding.
7. The micro-vibration based metal measurement fiber optic sensor of claim 1, wherein: the sensing probe (2) is also provided with a separation type handle (21), the separation type handle (21) is positioned at the rear end part of the test shell (20), and a buffer connecting seat (22) is arranged between the separation type handle (21) and the test shell (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320778694.6U CN220399233U (en) | 2023-04-11 | 2023-04-11 | Metal measurement optical fiber sensor based on micro-vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320778694.6U CN220399233U (en) | 2023-04-11 | 2023-04-11 | Metal measurement optical fiber sensor based on micro-vibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220399233U true CN220399233U (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320778694.6U Active CN220399233U (en) | 2023-04-11 | 2023-04-11 | Metal measurement optical fiber sensor based on micro-vibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220399233U (en) |
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2023
- 2023-04-11 CN CN202320778694.6U patent/CN220399233U/en active Active
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