CN210268951U - Optical fiber temperature detection system - Google Patents
Optical fiber temperature detection system Download PDFInfo
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- CN210268951U CN210268951U CN201921241437.9U CN201921241437U CN210268951U CN 210268951 U CN210268951 U CN 210268951U CN 201921241437 U CN201921241437 U CN 201921241437U CN 210268951 U CN210268951 U CN 210268951U
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Abstract
The utility model provides an optical fiber temperature detection system, which comprises a laser, an optical fiber temperature probe and a photoelectric detector; the optical fiber temperature probe comprises a sleeve, a double-fiber collimator and a ruby crystal, wherein the double-fiber collimator and the ruby crystal are inserted into the sleeve, a lens of the double-fiber collimator is arranged opposite to the ruby crystal, one part of the ruby crystal is exposed out of the sleeve, a laser is connected with an incident optical fiber of the double-fiber collimator, and a photoelectric detector is connected with a reflecting optical fiber of the double-fiber collimator. Use the utility model discloses an optic fibre temperature detecting system can be in high temperature, strong electromagnetic interference's environment steady operation.
Description
Technical Field
The utility model relates to an optical fiber probe technical field especially relates to an optical fiber temperature detecting system.
Background
Most of the existing temperature sensors adopt temperature sensitive resistors, the resistors change under different temperature conditions, and the temperature change is monitored by detecting the resistance change. The current temperature-sensitive resistor has the following problems: the relationship between the resistance value and the temperature is serious in nonlinearity; the consistency and the interchangeability of the elements are poor; the element is easy to age and has poor stability; except for special high-temperature thermistors, most thermistors are only suitable for the range of 0 ℃ to 150 ℃. Meanwhile, since the temperature sensitive resistor monitors the current change, it is difficult to stably operate under the condition that most of electromagnetic interference exists.
Disclosure of Invention
The main objective of the present invention is to provide an optical fiber temperature detecting system capable of working stably in high temperature and strong electromagnetic interference environment.
In order to achieve the above main object, the present invention provides an optical fiber temperature detecting system, which comprises a laser, an optical fiber temperature probe and a photoelectric detector; the optical fiber temperature probe comprises a sleeve, a double-fiber collimator and a ruby crystal, wherein the double-fiber collimator and the ruby crystal are inserted into the sleeve, a lens of the double-fiber collimator is arranged opposite to the ruby crystal, one part of the ruby crystal is exposed out of the sleeve, a laser is connected with an incident optical fiber of the double-fiber collimator, and a photoelectric detector is connected with a reflecting optical fiber of the double-fiber collimator.
According to the above technical scheme, the utility model discloses an optical fiber temperature detecting system's optic fibre temperature probe is through setting up two optical collimator and ruby crystal, and usable ruby crystal has different excitation effects when passing ruby crystal under different temperatures to obtain the light of different intensity, through the detection to light intensity, can obtain the temperature of current environment. Moreover, the devices adopted by the optical fiber temperature probe are all high-temperature resistant devices, temperature detection is carried out in an optical signal mode, the optical fiber is not easy to conduct electricity, and the optical fiber temperature probe can stably work in the environment with high temperature and strong electromagnetic interference to prevent the devices from being damaged.
In a further scheme, the side of the ruby crystal, which faces away from the dual-fiber collimator, is plated with a high-reflection film.
Therefore, the high-reflection film is arranged on the ruby crystal, light can be reflected to the reflection optical fiber, and the structure of the device can be simplified by using a film coating mode.
In a further scheme, a reflecting mirror is arranged on the side surface of the ruby crystal, which is back to the double-fiber collimator, and the reflecting mirror is adhered to the ruby crystal.
Therefore, the side surface of the ruby crystal, which is back to the dual-fiber collimator, is provided with the reflector, so that light can be reflected back to the reflecting fiber.
In a further scheme, the lens is a C lens, and the convex surface of the C lens faces the ruby crystal.
In a further aspect, the lens is a G lens.
In a further aspect, the laser is coupled to the incoming optical fiber via a first optical filter.
Therefore, the purity of the input optical signal of the laser can be guaranteed by arranging the first optical filter.
In a further scheme, the photoelectric detector is connected with the reflecting optical fiber through a second optical filter.
Therefore, the photoelectric detector is connected with the reflecting optical fiber through the filter plate, reflected light can be further filtered, and detection precision is improved.
In a further scheme, the incident optical fiber and the reflecting optical fiber are both multimode optical fibers.
Therefore, the incident optical fiber and the reflecting optical fiber both adopt multimode optical fibers, so that the transmission loss can be reduced, and the detection precision is improved.
Drawings
Fig. 1 is a structural diagram of a first embodiment of the optical fiber temperature detection system of the present invention.
Fig. 2 is a sectional view of the optical fiber temperature probe in the first embodiment of the optical fiber temperature detecting system of the present invention.
Fig. 3 is an exploded view of the optical fiber temperature probe according to the first embodiment of the optical fiber temperature detecting system of the present invention.
Fig. 4 is a structural diagram of an optical fiber temperature probe according to a second embodiment of the optical fiber temperature detecting system of the present invention.
Fig. 5 is a sectional view of the optical fiber temperature probe in the second embodiment of the optical fiber temperature detecting system of the present invention.
Fig. 6 is a sectional view of the optical fiber temperature probe in the third embodiment of the optical fiber temperature detecting system of the present invention.
Fig. 7 is a sectional view of the optical fiber temperature probe in the fourth embodiment of the optical fiber temperature detecting system of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
First embodiment of the optical fiber temperature detection system:
as shown in fig. 1, the optical fiber temperature detection system of the present embodiment includes a laser 1, an optical fiber temperature probe 2, a photodetector 3, a first optical filter 4, and a second optical filter 5. Referring to fig. 2 and 3, the optical fiber temperature probe 2 comprises a sleeve 21, a dual optical fiber collimator 22 and a ruby crystal 23, wherein the dual optical fiber collimator 22 and the ruby crystal 23 are inserted into the sleeve 21. The sleeve 21 is a glass sleeve. The double-fiber collimator 22 is provided with an incident fiber 221, a reflecting fiber 222 and a lens 223, the lens 223 of the double-fiber collimator 22 is arranged opposite to the ruby crystal 23, a part of the ruby crystal 23 is exposed out of the sleeve 21, the laser 1 is connected with the incident fiber 221 of the double-fiber collimator 22 through the first optical filter 4, and the photoelectric detector 3 is connected with the reflecting fiber 222 of the double-fiber collimator 22 through the second optical filter 5. The incident optical fiber 221 and the reflective optical fiber 222 are both multimode optical fibers. Lens 223 is a C lens with the convex surface facing ruby crystal 23. The side 231 of the ruby crystal 23 facing away from the dual-fiber collimator 22 is coated with a high-reflection film. In this embodiment, the first optical filter 4 is a band-pass filter, the center wavelength is 575nm, and the bandwidth is 40 nm. The second optical filter 5 is a band-pass filter with a center wavelength of 700nm and a bandwidth of 10 nm. The high reflection film is highly reflective to light having a wavelength of 575nm and light having a wavelength of 700 nm.
The optical fiber temperature detection system of the embodiment is in operation, light with a wavelength of 575nm is emitted through the laser 1, the light with the wavelength of 575nm is filtered by the first filter 4 and then is transmitted to the lens 223 through the incident optical fiber 221, the light with the wavelength of 575nm passes through the lens 223 and is incident into the ruby crystal 23, the light with the wavelength of 700nm is generated through the excitation effect of the ruby crystal 23, the light with the wavelength of 700nm is reflected by the high reflection film of the side surface 231 and is received by the reflection optical fiber 222, the light with the wavelength of 700nm is filtered by the second optical filter 5 and then is transmitted to the photoelectric detector 3, the photoelectric detector 3 can further convert an optical signal into an electrical signal and transmit the electrical signal to the controller for processing, so as to obtain a corresponding temperature value, which is a known technology of a person skilled in the art and.
Second embodiment of the fiber temperature sensing system:
in this embodiment, the optical fiber temperature detection system is different from the first embodiment of the optical fiber temperature detection system only in the optical fiber temperature probe.
Referring to fig. 4 and 5, the optical fiber temperature probe 6 of the present embodiment includes a sleeve 61, a dual optical fiber collimator 62 and a ruby crystal 63, and both the dual optical fiber collimator 62 and the ruby crystal 63 are inserted into the sleeve 61. The sleeve 61 is a glass sleeve. The dual-fiber collimator 62 is provided with an incident fiber 621, a reflecting fiber 622 and a lens 623, the lens 623 of the dual-fiber collimator 62 is arranged opposite to the ruby crystal 63, a part of the ruby crystal 63 is exposed out of the sleeve 61, the incident fiber 621 is connected with the laser, and the reflecting fiber 622 is connected with the photodetector. The side of the ruby crystal 63 facing away from the dual fiber collimator 62 is provided with a reflector 64, and the reflector 64 is adhered on the ruby crystal 63. Both the incident fiber 621 and the reflective fiber 622 are multimode fibers. Lens 623 is a C lens with its convex surface facing ruby crystal 63.
The optical fiber temperature detection system of this embodiment is in operation, the light of wavelength 575nm is emitted through the laser, the light of wavelength 575nm propagates to lens 623 through incident optical fiber 621, the light of wavelength 575nm passes through lens 623 and penetrates ruby crystal 63, through the excitation effect of ruby crystal 63, produce the light of wavelength 700nm, the light of wavelength 700nm reflects through reflector 64, receive by reflection optical fiber 622, the light of wavelength 700nm transmits to photodetector, photodetector can further convert the optical signal into the electric signal and send to the controller and handle, thereby obtain corresponding temperature numerical value, this is the well-known technology of skilled person in the art, and the description is omitted here.
Third embodiment of the optical fiber temperature detection system:
the present embodiment, the optical fiber temperature detection system is different from the first embodiment of the optical fiber temperature detection system only in the optical fiber temperature probe.
Referring to fig. 6, the fiber optic temperature probe 7 of the present embodiment includes a sleeve 71, a dual fiber collimator 72 and a ruby crystal 73, wherein the dual fiber collimator 72 and the ruby crystal 73 are inserted into the sleeve 71. The sleeve 71 is a glass sleeve. The double-fiber collimator 72 is provided with an incident fiber 721, a reflecting fiber 722 and a lens 723, the lens 723 of the double-fiber collimator 72 is arranged opposite to the ruby crystal 73, a part of the ruby crystal 73 is exposed out of the sleeve 71, the incident fiber 721 is connected with the laser, and the reflecting fiber 722 is connected with the photodetector. The side 731 of the ruby crystal 73 facing away from the dual fiber collimator 72 is coated with a highly reflective film. The incident optical fiber 721 and the reflective optical fiber 722 are both multimode optical fibers. The lens 723 is a G lens. The end faces of the incident optical fiber 721 and the reflective optical fiber 722 near the lens 723 may be beveled as necessary to obtain appropriate light incidence angles and reflection angles.
Fourth embodiment of the optical fiber temperature detection system:
the present embodiment, the optical fiber temperature detection system is different from the second embodiment of the optical fiber temperature detection system only in the optical fiber temperature probe.
Referring to fig. 7, the fiber optic temperature probe 8 of the present embodiment includes a sleeve 81, a dual fiber collimator 82 and a ruby crystal 83, and both the dual fiber collimator 82 and the ruby crystal 83 are inserted into the sleeve 81. The sleeve 81 is a glass sleeve. The dual-fiber collimator 82 is provided with an incident fiber 821, a reflecting fiber 822 and a lens 823, the lens 823 of the dual-fiber collimator 82 is arranged opposite to the ruby crystal 83, a part of the ruby crystal 83 is exposed out of the sleeve 81, the incident fiber 821 is connected with the laser, and the reflecting fiber 822 is connected with the photoelectric detector. The side of the ruby crystal 83 facing away from the dual fiber collimator 82 is mounted with a mirror 84, and the mirror 84 is adhered to the ruby crystal 83. The incident optical fiber 821 and the reflected optical fiber 822 are both multimode optical fibers. Lens 823 is a G lens. The end faces of the incident optical fiber 821 and the reflecting optical fiber 822 near the lens 823 may be beveled as necessary to obtain an appropriate incident angle and reflection angle of the light.
According to the above, the utility model discloses an optical fiber temperature detecting system's optic fibre temperature probe is through setting up two optical collimator and ruby crystal, and usable ruby crystal has different excitation effects when passing ruby crystal under different temperatures to obtain the light of different intensity, through the detection to light intensity, can obtain the temperature of current environment. Moreover, the devices adopted by the optical fiber temperature probe are all high-temperature resistant devices, temperature detection is carried out in an optical signal mode, the optical fiber is not easy to conduct electricity, and the optical fiber temperature probe can stably work in the environment with high temperature and strong electromagnetic interference to prevent the devices from being damaged.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (8)
1. An optical fiber temperature detection system, characterized by: comprises that
The device comprises a laser, an optical fiber temperature probe and a photoelectric detector;
the optical fiber temperature probe comprises a sleeve, a double-fiber collimator and a ruby crystal, wherein the double-fiber collimator and the ruby crystal are inserted into the sleeve, a lens of the double-fiber collimator and the ruby crystal are arranged oppositely, one part of the ruby crystal is exposed out of the sleeve, the laser is connected with an incident optical fiber of the double-fiber collimator, and the photoelectric detector is connected with a reflecting optical fiber of the double-fiber collimator.
2. The fiber optic temperature sensing system of claim 1, wherein:
and the side surface of the ruby crystal, which is back to the dual-fiber collimator, is plated with a high-reflection film.
3. The optical fiber temperature detection system of claim 1,
the ruby crystal is dorsad the side mounting of two fiber collimator has the speculum, the speculum is pasted on the ruby crystal.
4. The optical fiber temperature detection system according to any one of claims 1 to 3,
the lens is a C lens, and the convex surface of the C lens faces the ruby crystal.
5. The optical fiber temperature detection system according to any one of claims 1 to 3,
the lens is a G lens.
6. The optical fiber temperature detection system according to any one of claims 1 to 3,
the laser is connected to the incident optical fiber through a first optical filter.
7. The optical fiber temperature detection system according to any one of claims 1 to 3,
the photoelectric detector is connected with the reflecting optical fiber through a second optical filter.
8. The optical fiber temperature detection system according to any one of claims 1 to 3,
the incident optical fiber and the reflecting optical fiber are both multimode optical fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241437.9U CN210268951U (en) | 2019-07-31 | 2019-07-31 | Optical fiber temperature detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241437.9U CN210268951U (en) | 2019-07-31 | 2019-07-31 | Optical fiber temperature detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210268951U true CN210268951U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921241437.9U Active CN210268951U (en) | 2019-07-31 | 2019-07-31 | Optical fiber temperature detection system |
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| CN (1) | CN210268951U (en) |
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2019
- 2019-07-31 CN CN201921241437.9U patent/CN210268951U/en active Active
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