CN205300800U - Fluorescence optical fiber temperature sensing demodulalation system - Google Patents
Fluorescence optical fiber temperature sensing demodulalation system Download PDFInfo
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- CN205300800U CN205300800U CN201620047422.9U CN201620047422U CN205300800U CN 205300800 U CN205300800 U CN 205300800U CN 201620047422 U CN201620047422 U CN 201620047422U CN 205300800 U CN205300800 U CN 205300800U
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Abstract
The utility model provides a fluorescence optical fiber temperature sensing demodulalation system includes light path coupling device, light source drive circuit, the fluorescence signal detection circuit, signal demodulation treatment circuit and display device. Wherein, the light path coupling device includes fluorescence optic fibre temperature probe and optical fiber splice, and fluorescence optic fibre temperature probe and optical fiber splice are through the fiber connection. The light path coupling device still includes fluorescence exciting light source, glimmering light detector, filter plate and reflector. Filter plate and reflector parallel arrangement, the fluorescence exciting light source sets up with the filter plate relatively, and glimmering light detector sets up with the reflector relatively. Be provided with a coupling lens in filter plate and optical fiber splice's the light path. Be provided with the 2nd coupling lens in the light path of fluorescence exciting light source and filter plate. Be provided with the 3rd coupling lens in the light path of glimmering light detector and reflector. The fluorescence exciting light source sets up on the same same surface of a circuit board with glimmering light detector. This demodulalation system is convenient for, and just the reliability is high in the installation.
Description
Technical field
The utility model relates to the field of Fibre Optical Sensor, concrete, relates to a kind of fluorescence optical fiber TEMP demodulating system.
Background technology
Existing optical fiber sensing technology temperature-measurement principle is the material behavior based on rare-earth fluorescent material, after some rare-earth fluorescent material is subject to ultraviolet ray to irradiate and excite, in visible spectrum, launch line-spectra, i.e. fluorescence and twilight sunset thereof (twilight sunset is luminous after stopping of excitation). The decay time constant of phosphorescence afterglow is the monotropic function of temperature, and typical temperature is higher, and time constant is less. As long as record the value of time constant, just can obtain temperature. The great advantage of thermometric in this way, it is exactly the time constant that dut temperature only depends on fluorescent material, and it is irrelevant with its dependent variable of system, variation of the variation of the such as intensity of light source, efficiency of transmission, degree of coupling etc. does not affect measurement result, compared with having a clear superiority in light intensity thermometry and Wavelength demodulation method principle.
The innovation and creation that publication number CN201020193493.2 Chinese utility model patent discloses " a kind of fluorescent optical fiber temperature sensor detecting based on fluorescence lifetime " by name, this temperature sensor utilizes above-mentioned principle to realize one to have the fluorescent optical fiber temperature sensor of the advantage such as simple in structure, volume is little, lightweight, certainty of measurement is high, measurement category is large, anticorrosive, anti-electromagnetic interference capability is strong. But this sensor is because fluorescence excitation light source is different with the direction of fluorescent probe light path of living in, and fluorescence excitation light source and fluorescent probe can not be combined on same circuit board, comparatively complicated deposit combination in the time that product is installed time. And easily there is the situations such as loose contact in the connection of polylith circuit board, the stability of product and reliability a little less than.
Summary of the invention
The purpose of this utility model is to provide a kind of being convenient to and installs and the high fluorescence optical fiber TEMP demodulating system of reliability.
For achieving the above object, the fluorescence optical fiber TEMP demodulating system that the utility model provides comprises light path coupling device, light path coupling device comprises fluorescence excitation light source, fluorescent probe, filter plate and reflective mirror, filter plate and reflective mirror be arranged in parallel, fluorescence excitation light source and filter plate are oppositely arranged, and fluorescent probe and reflective mirror are oppositely arranged; Light path coupling device also comprises fluorescence fiber temperature measurement probe and fibre-optical splice, and fluorescence fiber temperature measurement probe is connected by optical fiber with fibre-optical splice, is provided with the first coupled lens in the light path of filter plate and fibre-optical splice; Fluorescence excitation light source and fluorescent probe are arranged on the same surface of same circuit board.
From such scheme, fluorescence optical fiber TEMP demodulating system of the present utility model is by increasing a reflective mirror, optical signal transmission direction is changed, fluorescence excitation light source and fluorescent probe can be arranged on same circuit board, the structure of simplification system, makes system easier for installation, in addition, also can reduce because connection between polylith circuit board causes the phenomenon of loose contact, improve stability and the reliability of system.
In a scheme, in the light path of fluorescence excitation light source and filter plate, be provided with the second coupled lens.
As can be seen here, the second coupled lens is set in the light path of fluorescence excitation light source and filter plate, the non-parallel light that is conducive to fluorescence excitation light source to be launched is adjusted into parallel rays.
In another scheme, in the light path of fluorescent probe and reflective mirror, be provided with the 3rd coupled lens.
As can be seen here, the 3rd coupled lens is set in the light path of fluorescent probe and reflective mirror, is conducive to the fluorescence fiber temperature measurement fluorescence collimated light beam returning of popping one's head in to converge on fluorescent probe, be convenient to optical signal to be converted to the signal of telecommunication.
In preferred scheme, the filter plate that filter plate is half-reflection and half-transmission.
As can be seen here, utilize the filter plate of half-reflection and half-transmission, the light that launch in fluorescence excitation light source can all be reflected, directly transmission propagate into reflective mirror of the light that fibre-optical splice returns. This setting can be simplified the structure of system, and it is more convenient to make to install.
Further, in scheme, fluorescence optical fiber TEMP demodulating system also comprises light source driving circuit, and light source driving circuit sends light source drive signal to fluorescence excitation light source.
From such scheme, light source driving circuit is by pulsewidth and the amplitude of the light emitted signal in light source drive signal control fluorescence excitation light source.
Further, in scheme, fluorescence optical fiber TEMP demodulating system also comprises fluorescence signal detection circuit, and fluorescence signal detection circuit receives the signal of telecommunication that fluorescent probe sends.
As can be seen here, fluorescent probe changes into the fluorescence fiber temperature measurement optical signal returning of popping one's head in after the signal of telecommunication, and fluorescence signal detection circuit receives the signal of telecommunication that fluorescent probe sends also to carry out filtering and amplifies and process this signal of telecommunication.
In concrete scheme, fluorescence optical fiber TEMP demodulating system also comprises signal demodulation process circuit, signal demodulation process circuit receives the voltage pulse signal that fluorescence signal detection circuit sends, and signal demodulation process circuit transmits control signal to light source driving circuit.
As can be seen here, signal demodulation process circuit can be processed the rear signal of telecommunication to fluorescence signal detection circuit and carry out Digital Signal Processing, obtain temperature information data, and transmit control signal to light source driving circuit according to temperature information data, make pulsewidth and the amplitude of the light emitted signal in the adjustable fluorescence excitation light of light source driving circuit source.
In scheme, fluorescence optical fiber TEMP demodulating system also comprises display unit more specifically, the data-signal that display unit receiving signal demodulation treatment circuit sends.
From such scheme, obtain after temperature information data through signal demodulation process circuit analog-to-digital conversion, displays temperature information in display unit, makes testing staff can obtain intuitively the relevant information of institute's detected temperatures.
Brief description of the drawings
Fig. 1 is the structure connection layout of the utility model fluorescence optical fiber TEMP demodulating system embodiment.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Detailed description of the invention
As shown in Figure 1, the utility model fluorescence optical fiber TEMP demodulating system comprises light path coupling device 4, light source driving circuit 13, fluorescence signal detection circuit 14, signal demodulation process circuit 15 and display unit 16. Wherein, light path coupling device 4 comprises fluorescence fiber temperature measurement probe 1 and fibre-optical splice 3, and fluorescence fiber temperature measurement probe 1 is connected by optical fiber 2 with fibre-optical splice 3. Light path coupling device 4 also comprises fluorescence excitation light source 10, fluorescent probe 12, filter plate 6 and reflective mirror 7, preferred, the filter plate that filter plate 6 is half-reflection and half-transmission.
As can be seen from Figure 1, filter plate 6 be arranged in parallel with reflective mirror 7, and fluorescence excitation light source 10 is oppositely arranged with filter plate 6, and fluorescent probe 12 is oppositely arranged with reflective mirror 7. In the light path of filter plate 6 and fibre-optical splice 3, be provided with the first coupled lens 5. Fluorescence excitation light source 10 is arranged on the same surface of same circuit board 12 with fluorescent probe 12. Preferably, in the light path of fluorescence excitation light source 10 and filter plate 6, be provided with the second coupled lens 8, in the light path of fluorescent probe 12 and reflective mirror 7, be provided with the 3rd coupled lens 11. Certainly, because the distance setting between fluorescence excitation light source 10 and filter plate 6 is nearer, and the light beam that launch in fluorescence excitation light source 10 can fully be reflexed on the first coupled lens 5, so can select not arrange the second coupled lens 8 in the light path of fluorescence excitation light source 10 and filter plate 6; Similarly, because the distance setting between fluorescent probe 12 and reflective mirror 7 is nearer, the light beam that reflective mirror 7 reflects can fully be received by fluorescent probe 12, so can select not arrange the 3rd coupled lens 11 in the light path of fluorescent probe 12 and reflective mirror 7.
In addition, light source driving circuit 13 is electrically connected with fluorescence excitation light source 10 and sends light source drive signal to fluorescence excitation light source 10. Fluorescence signal detection circuit 14 is electrically connected with fluorescent probe 11, and fluorescence signal detection circuit 14 receives the signal of telecommunication that fluorescent probe 11 sends. Signal demodulation process circuit 15 is electrically connected with light source driving circuit 13, fluorescence signal detection circuit 14 and display unit 16 respectively, signal demodulation process circuit 15 receives the voltage pulse signal that fluorescence signal detection circuit 14 sends, signal demodulation process circuit 15 transmits control signal to light source driving circuit 13, and signal demodulation process circuit 15 sends data-signal to display unit 16. Display unit 16 shows data message according to the data-signal of signal demodulation process circuit 15.
In the time that fluorescence optical fiber TEMP demodulating system is worked, first light source driving circuit 13 sends light source drive signal to fluorescence excitation light source 10, light stimulus light source 10 is pulsewidth and the amplitude utilizing emitted light signal to preset according to light source drive signal, optical signal is formed parallel rays and is sent to filter plate 6 by the second coupled lens 8, the ultraviolet light of light stimulus light source 10 being launched due to filter plate 6 has total reflection effect, filter plate 6 by light reflection to the first coupled lens 5, parallel rays is focused on fibre-optical splice 3 by the first coupled lens 5, light is transferred in fluorescence fiber temperature measurement probe 1 along optical fiber 2.
In fluorescence fiber temperature measurement probe 1, be provided with rare-earth fluorescent material, rare-earth fluorescent material is launched line-spectra after being subject to ultraviolet ray to irradiate and excite in visible spectrum, i.e. fluorescence and twilight sunset thereof, and twilight sunset is luminous after exciting light source stops. Therefore, under the effect of ultraviolet light and temperature, fluorescence fiber temperature measurement probe 1 produces fluorescence, fluorescence is transferred to fibre-optical splice 3 along optical fiber 2, and be transmitted into the first coupled lens 5 by fibre-optical splice, the first coupled lens 5 forms parallel rays by fluorescence and is sent to filter plate 6, because filter plate 6 has the effect of total transmissivity to fluorescence, therefore, fluorescence transmissive arrives reflective mirror 7 through filter plate, reflective mirror 7 then focuses on light reflection to the three coupled lens 9, the three coupled lens 9 on fluorescent probe 11 by parallel fluorescent light.
Fluorescent probe 11 is preferably light-sensitive material detector, fluorescent probe 11 is converted to the optical signal receiving the signal of telecommunication and sends to fluorescence signal detection circuit 14, in fluorescence signal detection circuit 14, the signal of telecommunication obtains the voltage pulse signal corresponding with fluorescence decay signal after the processing such as amplification, shaping pulse, filtering. Then, the voltage pulse signal obtaining after processing is sent to signal demodulation process circuit 15 by fluorescence signal detection circuit 14. In signal demodulation process circuit 15, voltage pulse signal is carried out to Digital Signal Processing, draw surveyed temperature data. Last signal demodulation process circuit 15 is presented at temperature data in display unit 16, and testing staff can obtain the relevant information of institute's detected temperatures intuitively. Signal demodulation process circuit 15 also can transmit control signal to light source driving circuit 13 according to temperature information data, makes pulsewidth and the amplitude of the light emitted signal in the adjustable fluorescence excitation light of light source driving circuit 13 source 10.
In foregoing description, fluorescence optical fiber TEMP demodulating system of the present utility model is by increasing a reflective mirror 7, optical signal transmission direction is changed, fluorescence excitation light source 10 and fluorescent probe 11 can be arranged on same circuit board 12, the structure of simplification system, makes system easier for installation, simultaneously, also can reduce because connection between polylith circuit board causes the phenomenon of loose contact, improve stability and the reliability of system. In addition, utilize the filter plate 6 of half-reflection and half-transmission, the light that launch in fluorescence excitation light source 10 can all be reflected, directly transmission propagate into reflective mirror 7 of the light that fibre-optical splice 3 returns, and this setting can be simplified the structure of system, and it is more convenient to make to install.
It should be noted that, these are only preferred embodiment of the present utility model, but design concept of the present utility model is not limited to this, all insubstantial modifications of utilizing this design to make the utility model, within also all falling into protection domain of the present utility model.
Claims (8)
1. fluorescence optical fiber TEMP demodulating system, it is characterized in that: comprise light path coupling device, described light path coupling device comprises fluorescence excitation light source, fluorescent probe, filter plate and reflective mirror, described filter plate and described reflective mirror be arranged in parallel, described fluorescence excitation light source and described filter plate are oppositely arranged, and described fluorescent probe and described reflective mirror are oppositely arranged;
Described light path coupling device also comprises fluorescence fiber temperature measurement probe and fibre-optical splice, and described fluorescence fiber temperature measurement probe is connected by optical fiber with described fibre-optical splice, is provided with the first coupled lens in the light path of described filter plate and described fibre-optical splice;
Described fluorescence excitation light source and described fluorescent probe are arranged on the same surface of same circuit board.
2. fluorescence optical fiber TEMP demodulating system according to claim 1, is characterized in that: in the light path of described fluorescence excitation light source and described filter plate, be provided with the second coupled lens.
3. fluorescence optical fiber TEMP demodulating system according to claim 2, is characterized in that: in the light path of described fluorescent probe and described reflective mirror, be provided with the 3rd coupled lens.
4. fluorescence optical fiber TEMP demodulating system according to claim 3, is characterized in that: the filter plate that described filter plate is half-reflection and half-transmission.
5. according to the fluorescence optical fiber TEMP demodulating system described in claim 1 to 4 any one, it is characterized in that: also comprise light source driving circuit, described light source driving circuit sends light source drive signal to described fluorescence excitation light source.
6. fluorescence optical fiber TEMP demodulating system according to claim 5, is characterized in that: also comprise fluorescence signal detection circuit, described fluorescence signal detection circuit receives the signal of telecommunication that described fluorescent probe sends.
7. fluorescence optical fiber TEMP demodulating system according to claim 6, it is characterized in that: also comprise signal demodulation process circuit, described signal demodulation process circuit receives the voltage pulse signal that described fluorescence signal detection circuit sends, and described signal demodulation process circuit transmits control signal to described light source driving circuit.
8. fluorescence optical fiber TEMP demodulating system according to claim 7, is characterized in that: also comprise display unit, described display unit receives the data-signal that described signal demodulation process circuit sends.
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| CN201620047422.9U CN205300800U (en) | 2016-01-18 | 2016-01-18 | Fluorescence optical fiber temperature sensing demodulalation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017129131A1 (en) * | 2016-01-29 | 2017-08-03 | 缪爱俊 | Light path-coupling device and fluorescence temperature-sensing optical system |
| CN107044890A (en) * | 2017-01-09 | 2017-08-15 | 辽宁达能电气股份有限公司 | Adaptive fluorescence fiber temperature measurement device and method over long distances |
| CN108332879A (en) * | 2018-03-23 | 2018-07-27 | 福建省力得自动化设备有限公司 | A kind of integrated fluorescence optical fiber temperature demodulation device of multichannel |
| CN108444613A (en) * | 2018-06-26 | 2018-08-24 | 南京五石金传感技术有限公司 | A kind of fluorescence method temperature measurement system and its measurement method |
| CN118129938A (en) * | 2024-05-06 | 2024-06-04 | 应急管理部沈阳消防研究所 | An optical system for fluorescent optical fiber temperature sensor |
-
2016
- 2016-01-18 CN CN201620047422.9U patent/CN205300800U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017129131A1 (en) * | 2016-01-29 | 2017-08-03 | 缪爱俊 | Light path-coupling device and fluorescence temperature-sensing optical system |
| CN107044890A (en) * | 2017-01-09 | 2017-08-15 | 辽宁达能电气股份有限公司 | Adaptive fluorescence fiber temperature measurement device and method over long distances |
| CN108332879A (en) * | 2018-03-23 | 2018-07-27 | 福建省力得自动化设备有限公司 | A kind of integrated fluorescence optical fiber temperature demodulation device of multichannel |
| CN108444613A (en) * | 2018-06-26 | 2018-08-24 | 南京五石金传感技术有限公司 | A kind of fluorescence method temperature measurement system and its measurement method |
| CN118129938A (en) * | 2024-05-06 | 2024-06-04 | 应急管理部沈阳消防研究所 | An optical system for fluorescent optical fiber temperature sensor |
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