WO2017129131A1 - 光路耦合装置及荧光温度传感光学系统 - Google Patents

光路耦合装置及荧光温度传感光学系统 Download PDF

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WO2017129131A1
WO2017129131A1 PCT/CN2017/072596 CN2017072596W WO2017129131A1 WO 2017129131 A1 WO2017129131 A1 WO 2017129131A1 CN 2017072596 W CN2017072596 W CN 2017072596W WO 2017129131 A1 WO2017129131 A1 WO 2017129131A1
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filter
fluorescent
fluorescence
light source
optical
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PCT/CN2017/072596
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French (fr)
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缪爱俊
吴占民
郑浩奇
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缪爱俊
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
    • G01K11/3213—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering using changes in luminescence, e.g. at the distal end of the fibres

Definitions

  • the present invention relates to the field of optical fiber sensing, and in particular to an optical path coupling device and a fluorescence temperature sensing optical system using the optical path coupling device.
  • the present invention is based on the Chinese Patent Application No. CN201610066758.4, filed on Jan. 29, 2016, the content of which is hereby incorporated by reference.
  • the existing optical fiber sensing technology temperature measurement principle is based on the material properties of rare earth fluorescent materials.
  • Some rare earth fluorescent materials are excited by ultraviolet rays and emit a linear spectrum in the visible spectrum, that is, fluorescence and other radiance, wherein afterglow is an excitation. Illumination after stopping.
  • the decay time constant of fluorescence afterglow is a single-valued function of temperature. Generally, the higher the temperature, the smaller the time constant. As long as the value of the time constant is measured, the temperature can be calculated.
  • the biggest advantage of using this method for temperature measurement is that the measured temperature depends only on the time constant of the fluorescent material, and has nothing to do with other variables of the system, such as changes in the intensity of the light source, transmission efficiency, changes in the degree of coupling, etc., which do not affect the measurement results. Compared with the principle of light intensity measurement and wavelength demodulation, there are obvious advantages.
  • the Chinese utility model patent of application number CN201020193493 discloses an invention named "a fluorescent fiber temperature sensor based on fluorescence lifetime detection", which realizes a structure with simple structure, small volume, light weight and measurement by using the above principle.
  • Fluorescent fiber optic temperature sensor with high precision, large measuring range, strong anti-corrosion and anti-electromagnetic interference capability.
  • the fluorescence excitation light source and the fluorescence detector cannot be combined on the same circuit board, and the combination is complicated when the product is installed, and the plurality of circuit boards are complicated.
  • the connection of the line is prone to poor contact, etc., and the stability and reliability of the product are weak.
  • a primary object of the present invention is to provide an optical path coupling device that is easy to install, has high stability, and has better measurement performance.
  • Another object of the present invention is to provide a fluorescent temperature sensing optical system that is easy to install and has high stability and measurement accuracy.
  • the optical path coupling device comprises a fiber optic connector, a fluorescence excitation light source, a fluorescence detector and a filter.
  • the fluorescence excitation light source and the fluorescence detector are disposed on the same surface of the same circuit board; the fluorescence detector and The filter is relatively disposed, and a coupling lens is disposed on the optical path of the filter and the optical fiber connector; the filter and the coupling lens are both located on the optical path between the fluorescent excitation light source and the optical fiber connector.
  • the optical path coupling device further includes a casing, the casing is provided with an optical mirror slot, and the filter is located inside the optical mirror slot.
  • the box body is further provided with a through hole, and the fiber connector and the coupling lens are located in the through hole.
  • the optical path coupling device further includes a fixed apron disposed between the fiber optic connector and the coupling lens.
  • the optical path coupling device further includes an external interface, and the external interface is electrically connected to the circuit board.
  • the optical path coupling device further includes a mirror, the mirror is located in the optical mirror slot, the filter is disposed in parallel with the mirror, and the fluorescent excitation light source is disposed opposite to the mirror.
  • the fluorescent excitation source is arranged in parallel with the fluorescence detector.
  • the filter is a transflective filter, and the light emitted by the fluorescent excitation source is transmitted from the filter, and the fluorescence emitted by the coupling lens is reflected by the filter and then incident on the fluorescence detector.
  • the fluorescent temperature sensing optical system comprises an optical path coupling device comprising a fiber optic connector, a fluorescence excitation light source, a fluorescence detector and a filter, and the fluorescence excitation light source and the fluorescence detector are disposed in the same On the same surface of a circuit board.
  • the fluorescence detector is disposed opposite to the filter, and a coupling lens is disposed on the optical path of the filter and the fiber connector. Both the filter and the coupling lens are located on the optical path between the fluorescent excitation source and the fiber optic connector.
  • the optical path coupling device further includes a casing, the casing is provided with an optical mirror slot, and the filter is located inside the optical mirror slot.
  • the box body is also provided with a through hole, and the fiber connector and the coupling lens are located in the through hole.
  • the fluorescence temperature sensing optical system further comprises a light source driving circuit, the light source driving circuit sends a light source driving signal to the fluorescent excitation light source; the fluorescent signal detecting circuit, the fluorescent signal detecting circuit receives the electrical signal sent by the fluorescent detector; and the signal demodulation
  • the processing circuit, the signal demodulation processing circuit receives the voltage pulse signal sent by the fluorescent signal detecting circuit, and the signal demodulating processing circuit sends a control signal to the light source driving circuit; and the display device receives the data signal sent by the signal demodulating processing circuit.
  • the optical path coupling device provided by the invention can set the fluorescence excitation light source and the fluorescence detector on the same circuit board, simplifying the structure of the system, making the system installation more convenient, and reducing the line connection between the multiple circuit boards. Poor contact, improve system stability and reliability.
  • an optical mirror slot is disposed in the casing of the optical path coupling device, and the filter mirror is installed inside the optical mirror slot to reduce interference of external signals during the propagation of the optical signal.
  • the through hole is provided in the box body, and when the optical path coupling device is assembled, the assembly of the component can be facilitated, and the optical path can be propagated in the correct direction.
  • the measurement error of the instrument is caused by the fixed contact apron at the contact end of the fiber connector and the coupling lens. It can effectively prevent component damage and improve the measurement accuracy of the instrument.
  • the optical path coupling device is provided with an external interface, and the external circuit can be connected with the internal circuit to complete the instrument measurement work.
  • the installation angle of the fluorescent excitation light source and the fluorescence detector can be changed and the installation position of the circuit board can be changed, thereby simplifying the optical path coupling device. structure.
  • the fluorescent temperature sensing optical system provided by the present invention is easy to install by using the optical path coupling device after the simplified structure, the stability of the system and the accuracy of the system measurement are also improved.
  • the light source driving circuit of the present invention controls the pulse width and amplitude of the emitted light signal of the fluorescent excitation light source by the light source driving signal, and the fluorescent signal converts the optical signal returned by the fluorescent optical fiber temperature measuring probe into an electrical signal, and the fluorescent signal detecting circuit Receiving an electrical signal sent by the fluorescent detector and filtering and amplifying the electrical signal.
  • the signal demodulation processing circuit can perform digital signal processing on the electrical signal processed by the fluorescent signal detecting circuit to obtain temperature information data, and send a control signal to the light source driving circuit according to the temperature information data, so that the light source driving circuit can adjust the emission of the fluorescent excitation light source.
  • the pulse width and amplitude of the optical signal After the temperature information data is obtained by analog-to-digital conversion of the signal demodulation processing circuit, the temperature information is displayed on the display device, so that the inspector can intuitively obtain the relevant information of the detected temperature.
  • Figure 1 is a structural connection diagram of an embodiment of a fluorescence temperature sensing optical system of the present invention.
  • Figure 2 is a structural exploded view of an embodiment of the optical path coupling device of the present invention.
  • Figure 3 is a cross-sectional view showing the structure of an embodiment of the optical path coupling device of the present invention.
  • Figure 4 is a cross-sectional view showing the structure of a casing of an embodiment of the optical path coupling device of the present invention.
  • the fluorescence temperature sensing optical system comprises a fluorescent fiber temperature measuring probe 12, a light source driving circuit 15, a fluorescent signal detecting circuit 14, a signal demodulating processing circuit 16, a display device 17, and an optical path coupling device 18.
  • the optical path coupling device 18 includes a fluorescent excitation light source 10 and a fluorescence detector 9.
  • the fluorescence excitation light source 10 and the fluorescence detector 9 are disposed on the same surface of the same circuit board 11.
  • the fluorescence excitation light source 10 is disposed in parallel with the fluorescence detector 9.
  • the light source driving circuit 15 is electrically connected to the fluorescent excitation light source 10 and transmits a light source driving signal to the fluorescent excitation light source 10.
  • the fluorescent signal detecting circuit 14 is electrically connected to the fluorescent detector 9, and the fluorescent signal detecting circuit 14 receives the electrical signal transmitted from the fluorescent detector 9.
  • the signal demodulation processing circuit 16 is electrically connected to the light source driving circuit 15, the fluorescent signal detecting circuit 14, and the display device 17, respectively, and the signal demodulating processing circuit 16 receives the voltage pulse signal transmitted by the fluorescent signal detecting circuit 14, and the signal demodulating processing circuit 16
  • the light source driving circuit 15 transmits a control signal
  • the signal demodulation processing circuit 16 transmits a data signal to the display device 17.
  • the display device 17 displays the data information based on the data signal of the signal demodulation processing circuit 16.
  • the optical path coupling device 18 further includes a fiber optic connector 1, an external interface 2, a casing 3, and a filter 6.
  • the filter 6 is a transflective filter.
  • the fluorescence detector 9 is disposed opposite to the filter 6, and the coupling lens 5 is disposed on the optical path of the filter 6 and the optical fiber connector 1.
  • Both the filter 6 and the coupling lens 5 are located on the optical path of the fluorescent excitation light source 10 and the optical fiber connector 1.
  • the casing 3 is provided with an optical mirror groove 8, and the filter 6 is located inside the optical mirror groove 8.
  • the casing 3 is further provided with a through hole 31.
  • the optical fiber connector 1 and the coupling lens 5 are located in the through hole 31, and the aperture of the through hole 31 is layered and reduced step by step from the outside to the inside of the casing 3.
  • the optical path coupling device 18 further includes a fixed apron 4 disposed between the optical fiber connector 1 and the coupling lens 5.
  • the optical path coupling device 18 further includes an external interface 2, which is electrically connected to the circuit board 11, and the external interface 2 can be used for connection between the internal circuit of the optical path coupling device 18 and an external circuit.
  • the optical path coupling device 18 further includes a mirror 7, the mirror 7 is located in the optical mirror slot 8, the filter 6 is disposed in parallel with the mirror 7, and the fluorescent excitation source 10 is disposed opposite to the mirror 7.
  • the fluorescence excitation light source 10 is inserted in the through hole 33 connected to the optical mirror groove 8, and the fluorescence detector 9 is inserted in the optical mirror groove 8. In the through hole 32.
  • a coupling lens for focusing the light reflected by the filter 6 onto the fluorescence detector 9 can also be added to the optical path between the fluorescent detector 9 and the filter 6.
  • a coupling lens may be added to the optical path between the fluorescent excitation source 10 and the mirror 7 for propagating the parallel rays of the light emitted by the fluorescent excitation source 10 to the mirror 7.
  • the distance between the fluorescent detector 9 and the filter 6 is relatively close, the light reflected by the filter 6 can be sufficiently focused on the fluorescent detector 9; and the fluorescent excitation source 10 and the mirror 7 are The distance between the fluorescent excitation light sources 10 can be sufficiently transmitted to the coupling lens 5, so that the coupling lens is not added to the scheme shown in FIG.
  • the light source driving circuit 15 first sends a light source driving signal to the fluorescent excitation light source 10, and the fluorescent excitation light source 10 emits an optical signal according to a predetermined pulse width and amplitude according to the light source driving signal, and the light passes through the mirror. 7 is reflected on the filter 6, since the light emitted by the fluorescent excitation light source 10 can be transmitted through the filter 6, the light directly passes through the filter 6 to reflect the light onto the coupling lens 5, and the coupling lens 5 focuses the light onto the optical fiber.
  • the connector 1 is connected to the fluorescent fiber temperature measuring probe 12 along the optical fiber 13 because the optical fiber connector 1 and the fluorescent fiber temperature measuring probe 12 are connected through the optical fiber 13.
  • the fluorescent fiber temperature measuring probe 12 is provided with a rare earth fluorescent substance. After the rare earth fluorescent substance is irradiated with ultraviolet rays and excited, a linear spectrum, that is, fluorescence and other radiance is emitted in the visible spectrum, and the afterglow is the illuminating after the excitation light source is stopped. Therefore, under the action of ultraviolet light and temperature, the fluorescent fiber temperature measuring probe 12 generates fluorescence, and the fluorescent light is transmitted along the optical fiber 13 to the optical fiber connector 1, and is emitted from the optical fiber connector 1 to the coupling lens 5, and the coupling lens 5 forms the fluorescence in parallel. The light is transmitted to the filter 6, and since the filter 6 has a total reflection effect on the fluorescence, the filter 6 reflects the light onto the fluorescence detector 9.
  • the fluorescent detector 9 is preferably a photosensitive material detector.
  • the fluorescent detector 9 converts the received optical signal into an electrical signal and sends it to the fluorescent signal detecting circuit 14.
  • the electrical signal is amplified, pulse shaped, After filtering or the like, a voltage pulse signal corresponding to the fluorescence attenuation signal is obtained.
  • the fluorescence signal detecting circuit 14 transmits the processed voltage pulse signal to the signal demodulation processing circuit 16.
  • the signal demodulation processing circuit 16 performs digital signal processing on the voltage pulse signal to obtain the measured temperature data.
  • the final signal demodulation processing circuit 16 displays the temperature data on the display device 17, and the inspector can intuitively obtain the relevant information of the detected temperature.
  • the signal demodulation processing circuit 16 can also transmit a control signal to the light source driving circuit 15 based on the temperature information data, so that the light source driving circuit 15 can adjust the pulse width and amplitude of the emitted light signal of the fluorescent excitation light source 10.
  • the fluorescent temperature sensing optical system provided by the present invention simplifies the structure of the system by using the optical path coupling device 18 with a simplified structure, thereby making the system installation more convenient and, in addition, reducing the number of circuit boards.
  • the phenomenon of poor contact caused by the connection of the lines improves the stability and reliability of the system, and also improves the accuracy of the system measurement.
  • the fluorescent temperature sensing optical system provided by the invention can be applied to various temperature detecting occasions, especially in the temperature detecting occasion of detecting a small space or a closed space, because the optical fiber joint optical system has a small volume of the optical fiber joint. It can be easily inserted into an area where space is small and it is difficult for people to enter. Moreover, the optical path coupling device has a small volume and can be conveniently placed in a device with a small space to detect the temperature inside the small device. In addition, the fluorescence temperature sensing optical system of the present invention has a simple structure, is easy to install, and has high stability and measurement accuracy.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

一种光路耦合装置（18），包括光纤接头（1）、荧光激励光源（10）、荧光探测器（9）和滤波片（6），荧光激励光源（10）与荧光探测器（9）设置在同一块电路板（11）的同一表面上；荧光探测器（9）与滤波片（6）相对设置，滤波片（6）与光纤接头（1）的光路上设置有耦合透镜（5）；滤波片（6）与耦合透镜（5）均位于荧光激励光源（10）与光纤接头（1）之间的光路上。光路耦合装置（18）还包括盒体（3），盒体（3）设置有光学镜槽（8），滤波片（6）位于光学镜槽（8）内部。盒体（3）还设置有通孔（31），光纤接头（1）与耦合透镜（5）位于通孔（31）内。还公开了一种荧光温度传感光学系统，包括荧光光纤测温探头（12）、光源驱动电路（15）、荧光信号探测电路（14）、信号解调处理电路（16）、显示装置（17）以及光路耦合装置（18）。

Description

光路耦合装置及荧光温度传感光学系统 技术领域
本发明涉及光纤传感领域，具体的，涉及一种光路耦合装置以及使用该光路耦合装置的荧光温度传感光学系统。本发明是基于申请号为CN201610066758.4、申请日为2016年1月29日的中国发明专利申请，该申请的内容引入本文作为参考。
 背景技术
现有的光纤传感技术测温原理是基于稀土荧光物质的材料特性，某些稀土荧光物质受紫外线照射并激发后，在可见光谱中发射线状光谱，即荧光及其余辉，其中余辉为激励停止后的发光。荧光余辉的衰变时间常数是温度的单值函数，通常温度越高，时间常数越小。只要测得时间常数的值，就可以计算出温度。应用这种方法测温的最大优点，就是被测温度只取决于荧光材料的时间常数，而与系统的其他变量无关，例如光源强度的变化、传输效率、耦合程度的变化等都不影响测量结果，较光强测温法和波长解调法原理上有明显优势。
申请号CN201020193493的中国实用新型专利公开了名为“一种基于荧光寿命检测的荧光光纤温度传感器”的发明创造，该温度传感器利用上述原理实现了一种具有结构简单、体积小、重量轻、测量精度高、测量范围大，抗腐蚀、抗电磁干扰能力强等优点的荧光光纤温度传感器。但该传感器由于荧光激励光源和荧光探测器所处光路的方向不同，荧光激励光源和荧光探测器不能组合在同一块电路板上，在产品安装时存组合时较为复杂，且多块电路板的线路连接容易出现接触不良等情况，产品的稳定性及可靠性较弱。
 技术问题
本发明的主要目的是提供一种便于安装、稳定性较高且测量性能更好的光路耦合装置。
本发明的另一目的是提供一种便于安装且稳定性及测量精度较高的荧光温度传感光学系统。
 技术解决方案
为了实现上述主要目的，本发明提供的光路耦合装置包括光纤接头、荧光激励光源、荧光探测器和滤波片，荧光激励光源与荧光探测器设置在同一块电路板的同一表面上；荧光探测器与滤波片相对设置，滤波片与光纤接头的光路上设置有耦合透镜；滤波片与耦合透镜均位于荧光激励光源与光纤接头之间的光路上。
一个优选的方案是，光路耦合装置还包括盒体，盒体设置有光学镜槽，滤波片位于光学镜槽内部。
另一个方案是，盒体还设置有通孔，光纤接头与耦合透镜位于通孔内。
进一步的方案中，光路耦合装置还包括固定胶圈，固定胶圈设置在光纤接头与耦合透镜之间。
进一步的方案中，光路耦合装置还包括外接接口，外接接口与电路板电连接。
优选的方案中，光路耦合装置还包括反光镜，反光镜位于光学镜槽内，滤波片与反光镜平行设置，荧光激励光源与反光镜相对设置。荧光激励光源与荧光探测器平行设置。
更进一步的方案是，滤波片为半反半透的滤波片，荧光激励光源所发射的光线从滤波片中透射，耦合透镜发出的荧光被滤波片反射后入射到荧光探测器上。
为了实现上述另一目的，本发明提供的荧光温度传感光学系统包括光路耦合装置，光路耦合装置包括光纤接头、荧光激励光源、荧光探测器和滤波片，荧光激励光源与荧光探测器设置在同一块电路板的同一表面上。荧光探测器与滤波片相对设置，滤波片与光纤接头的光路上设置有耦合透镜。滤波片与耦合透镜均位于荧光激励光源与光纤接头之间的光路上。光路耦合装置还包括盒体，盒体设置有光学镜槽，滤波片位于光学镜槽内部。盒体还设置有通孔，光纤接头与耦合透镜位于通孔内。
进一步的方案中，荧光温度传感光学系统还包括光源驱动电路，光源驱动电路向荧光激励光源发送光源驱动信号；荧光信号探测电路，荧光信号探测电路接收荧光探测器发送的电信号；信号解调处理电路，信号解调处理电路接收荧光信号探测电路发送的电压脉冲信号，且信号解调处理电路向光源驱动电路发送控制信号；显示装置，显示装置接收信号解调处理电路发送的数据信号。
 有益效果
本发明提供的光路耦合装置将荧光激励光源与荧光探测器可设置在同一块电路板上，简化系统的结构，使系统安装更加方便，此外，还可减少由于多块电路板间线路连接而引起接触不良的现象，提高系统的稳定性和可靠性。
并且，在光路耦合装置的盒体设置光学镜槽，并将滤波镜安装在光学镜槽内部，降低光信号传播过程中受到外界信号的干扰。而在盒体中设置通孔，在组装光路耦合装置时，可方便组件的安装，且能够使得光路沿正确的方向传播。
此外，为了防止在组装光路耦合装置时，光纤接头与耦合透镜的因相互碰撞而损坏于光纤接头与耦合透镜，从而造成仪器的测量误差，在于光纤接头与耦合透镜的接触端设置固定胶圈，可有效防止组件损坏，提高仪器测量精度。同时，光路耦合装置设置外接接口，外置电路可与内部电路连接，进而完成仪器测量工作。
并且，为了使荧光激励光源与荧光探测器可以设置在同一块电路板的同一表面，可通过改变荧光激励光源与荧光探测器的安装角度以及改变电路板的安装位置实现，从而简化光路耦合装置的结构。
由于本发明的提供的荧光温度传感光学系统，通过使用简化结构后的光路耦合装置，方便安装，同时还提高了系统的稳定性以及系统测量的精度。此外，本发明的光源驱动电路通过光源驱动信号控制荧光激励光源的所发射光信号的脉宽及幅度，荧光探测器将荧光光纤测温探头返回的光信号转化成电信号后，荧光信号探测电路接收荧光探测器发送的电信号并对该电信号进行滤波及放大处理。信号解调处理电路可对荧光信号探测电路处理后电信号进行数字信号处理，得到温度信息数据，并根据温度信息数据向光源驱动电路发送控制信号，使光源驱动电路可调节荧光激励光源的所发射光信号的脉宽及幅度。经过信号解调处理电路模数转换得到温度信息数据后，在显示装置中显示温度信息，使得检测人员可直观的获得所检测温度的相关信息。
 附图说明
图1是本发明荧光温度传感光学系统实施例的结构连接图。
图2是本发明光路耦合装置实施例的结构分解图。
图3是本发明光路耦合装置实施例的结构剖视图。
图4是本发明光路耦合装置实施例盒体的结构剖视图。
以下结合附图及实施例对发明作进一步说明。
 本发明的实施方式
如图1所示，本发明提供的荧光温度传感光学系统包括荧光光纤测温探头12、光源驱动电路15、荧光信号探测电路14、信号解调处理电路16、显示装置17以及光路耦合装置18。其中，光路耦合装置18包括荧光激励光源10以及荧光探测器9。荧光激励光源10与荧光探测器9设置在同一块电路板11的同一表面上，优选的，荧光激励光源10与荧光探测器9平行设置。光源驱动电路15与荧光激励光源10电连接并向荧光激励光源10发送光源驱动信号。荧光信号探测电路14与荧光探测器9电连接，荧光信号探测电路14接收荧光探测器9发送的电信号。信号解调处理电路16分别与光源驱动电路15、荧光信号探测电路14及显示装置17电连接，信号解调处理电路16接收荧光信号探测电路14发送的电压脉冲信号，信号解调处理电路16向光源驱动电路15发送控制信号，且信号解调处理电路16向显示装置17发送数据信号。显示装置17根据信号解调处理电路16的数据信号显示数据信息。
参见图2和图3，光路耦合装置18还包括光纤接头1、外接接口2、盒体3以及滤波片6，优选的，滤波片6为半反半透的滤波片。荧光探测器9与滤波片6相对设置，滤波片6与光纤接头1的光路上设置有耦合透镜5。滤波片6与耦合透镜5均位于荧光激励光源10与光纤接头1的光路上。盒体3设置有光学镜槽8，滤波片6位于光学镜槽8内部。盒体3还设置有通孔31，光纤接头1与耦合透镜5位于通孔31内，通孔31的孔径由盒体3外部向内部逐级分层缩小。
光路耦合装置18还包括固定胶圈4，固定胶圈4设置在光纤接头1与耦合透镜5之间。光路耦合装置18还包括外接接口2，外接接口2与电路板11电连接，外接接口2可用于光路耦合装置18内部电路与外部电路的连接。在本实施例中，光路耦合装置18还包括反光镜7，反光镜7位于光学镜槽8内，滤波片6与反光镜7平行设置，荧光激励光源10与反光镜7相对设置。此外，参见图4，为了进一步固定荧光激励光源10及荧光探测器9，荧光激励光源10插入在与光学镜槽8连接的通孔33中，且荧光探测器9插入在与光学镜槽8连接的通孔32中。
当然，还可在荧光探测器9与滤波片6之间的光路上增加一个耦合透镜，用于将滤波片6反射的光线聚焦到荧光探测器9上。类似的，在荧光激励光源10与反光镜7之间的光路上也可增加一个耦合透镜，用于将荧光激励光源10所发射的光线行程平行光线传播到反光镜7上。但在本实施例中，由于荧光探测器9与滤波片6之间的距离较近，滤波片6所反射的光线能被充分聚焦在荧光探测器9；且荧光激励光源10与反光镜7之间的距离较近，荧光激励光源10所发射的光束能被充分传输到耦合透镜5上，所以图4所示的方案中并没有增加耦合透镜。
在荧光温度传感光学系统工作时，首先由光源驱动电路15向荧光激励光源10发送光源驱动信号，荧光激励光源10根据光源驱动信号以预设的脉宽及幅度发射光信号，光线通过反光镜7反射到滤波片6上，由于荧光激励光源10所发射的光线可以从滤波片6中透射过去，光线直接透过滤波片6将光线反射到耦合透镜5上，耦合透镜5将光线聚焦到光纤接头1，由于光纤接头1与荧光光纤测温探头12通过光纤13连接，光线可沿着光纤13传输到荧光光纤测温探头12中。
在荧光光纤测温探头12中设置有稀土荧光物质，稀土荧光物质受紫外线照射并激发后，在可见光谱中发射线状光谱，即荧光及其余辉，余辉为激励光源停止后的发光。因此，在紫外光线及温度的作用下，荧光光纤测温探头12产生荧光，荧光沿着光纤13传输到光纤接头1，并由光纤接头1发射到耦合透镜5上，耦合透镜5将荧光形成平行光线传送到滤波片6，由于滤波片6对荧光具有全反射的作用，因此，滤波片6将光线反射到荧光探测器9上。
荧光探测器9优选为光敏材料探测器，荧光探测器9将接收到的光信号转换为电信号并发送到荧光信号探测电路14，在荧光信号探测电路14中，电信号经过放大、脉冲整形、滤波等处理后得到与荧光衰减信号对应的电压脉冲信号。接着，荧光信号探测电路14将处理后得到的电压脉冲信号发送到信号解调处理电路16。信号解调处理电路16中对电压脉冲信号进行数字信号处理，得出所测的温度数据。最后信号解调处理电路16将温度数据显示在显示装置17上，检测人员可直观的获得所检测温度的相关信息。此外，信号解调处理电路16还可根据温度信息数据向光源驱动电路15发送控制信号，使光源驱动电路15可调节荧光激励光源10的所发射光信号的脉宽及幅度。
由上面的描述可知，本发明提供的荧光温度传感光学系统，通过使用简化结构后的光路耦合装置18，简化了系统的结构，使系统安装更加方便，此外，还可减少由于多块电路板间线路连接而引起接触不良的现象，提高系统的稳定性和可靠性，同时还提高了系统测量的精度。
需要说明的是，以上仅为本发明的优选实施例，但本发明的设计构思并不局限于此，凡利用此构思对本发明做出的非实质性修改，也均落入本发明的保护范围之内。
 工业实用性
本发明提供的荧光温度传感光学系统可以应用在多种温度检测的场合，尤其是应用在检测空间较小或者密闭的空间的温度检测场合，由于荧光温度传感光学系统的光纤接头体积很小，可以很容易的插入到空间小且人手不容易进入的区域。且光路耦合装置的体积也很小，可以方便的放置在空间较小的设备内，从而对体积小的设备内部的温度进行检测。另外，本发明的荧光温度传感光学系统结构简单，便于安装且稳定性及测量精度较高。

Claims (16)

  1. 光路耦合装置，其特征在于：包括光纤接头、荧光激励光源、荧光探测器和滤波片，所述荧光激励光源与所述荧光探测器设置在同一块电路板的同一表面上；
    所述荧光探测器与所述滤波片相对设置，所述滤波片与所述光纤接头的光路上设置有耦合透镜；
    所述滤波片与所述耦合透镜均位于所述荧光激励光源与所述光纤接头之间的光路上。
  2. 根据权利要求1所述的光路耦合装置，其特征在于：还包括盒体，所述盒体设置有光学镜槽，所述滤波片位于所述光学镜槽内部。
  3. 根据权利要求2所述的光路耦合装置，其特征在于：所述盒体还设置有通孔，所述光纤接头与所述耦合透镜位于所述通孔内。
  4. 根据权利要求1至3任一项所述的光路耦合装置，其特征在于：还包括固定胶圈，所述固定胶圈设置在所述光纤接头与所述耦合透镜之间。
  5. 根据权利要求1至4任一项所述的光路耦合装置，其特征在于：还包括外接接口，所述外接接口与所述电路板电连接。
  6. 根据权利要求1至5任一项所述的光路耦合装置，其特征在于：还包括反光镜，所述反光镜位于所述光学镜槽内，所述滤波片与所述反光镜平行设置，所述荧光激励光源与所述反光镜相对设置。
  7. 根据权利要求1至6任一项所述的光路耦合装置，其特征在于：所述滤波片为半反半透的滤波片，所述荧光激励光源所发射的光线从所述滤波片中透射，所述耦合透镜发出的荧光被所述滤波片反射后入射到所述荧光探测器上。
  8. 根据权利要求1至7任一项所述的光路耦合装置，其特征在于：所述荧光激励光源与所述荧光探测器平行设置。
  9. 荧光温度传感光学系统，包括光路耦合装置，其特征在于：所述光路耦合装置包括光纤接头、荧光激励光源、荧光探测器和滤波片，所述荧光激励光源与所述荧光探测器设置在同一块电路板的同一表面上；
    所述荧光探测器与所述滤波片相对设置，所述滤波片与所述光纤接头的光路上设置有耦合透镜；
    所述滤波片与所述耦合透镜均位于所述荧光激励光源与所述光纤接头之间的光路上。
  10. 根据权利要求9所述的荧光温度传感光学系统，其特征在于：
    所述光路耦合装置还包括盒体，所述盒体设置有光学镜槽，所述滤波片位于所述光学镜槽内部；
    所述盒体还设置有通孔，所述光纤接头与所述耦合透镜位于所述通孔内。
  11. 根据权利要求10所述的荧光温度传感光学系统，其特征在于：还包括
    光源驱动电路，所述光源驱动电路向所述荧光激励光源发送光源驱动信号；
    荧光信号探测电路，所述荧光信号探测电路接收所述荧光探测器发送的电信号；
    信号解调处理电路，所述信号解调处理电路接收所述荧光信号探测电路发送的电压脉冲信号，且所述信号解调处理电路向所述光源驱动电路发送控制信号；
    显示装置，所述显示装置接收所述信号解调处理电路发送的数据信号。
  12. 根据权利要求9至11任一项所述的荧光温度传感光学系统，其特征在于：还包括固定胶圈，所述固定胶圈设置在所述光纤接头与所述耦合透镜之间。
  13. 根据权利要求9至12任一项所述的荧光温度传感光学系统，其特征在于：还包括外接接口，所述外接接口与所述电路板电连接。
  14. 根据权利要求9至13任一项所述的荧光温度传感光学系统，其特征在于：还包括反光镜，所述反光镜位于所述光学镜槽内，所述滤波片与所述反光镜平行设置，所述荧光激励光源与所述反光镜相对设置。
  15. 根据权利要求9至14任一项所述的荧光温度传感光学系统，其特征在于：所述滤波片为半反半透的滤波片，所述荧光激励光源所发射的光线从所述滤波片中透射，所述耦合透镜发出的荧光被所述滤波片反射后入射到所述荧光探测器上。
  16. 根据权利要求9至15任一项所述的荧光温度传感光学系统，其特征在于：所述荧光激励光源与所述荧光探测器平行设置。
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