WO2010106919A1 - Fluorescence temperature sensor and method for determining failure of same - Google Patents

Fluorescence temperature sensor and method for determining failure of same Download PDF

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Publication number
WO2010106919A1
WO2010106919A1 PCT/JP2010/053517 JP2010053517W WO2010106919A1 WO 2010106919 A1 WO2010106919 A1 WO 2010106919A1 JP 2010053517 W JP2010053517 W JP 2010053517W WO 2010106919 A1 WO2010106919 A1 WO 2010106919A1
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WIPO (PCT)
Prior art keywords
light
unit
temperature sensor
fluorescence
phosphor
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PCT/JP2010/053517
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French (fr)
Japanese (ja)
Inventor
静一郎 衣笠
淳之 加藤
則雄 菊地
雄成 柳川
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株式会社山武
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Publication of WO2010106919A1 publication Critical patent/WO2010106919A1/en

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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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers

Definitions

  • the present invention relates to a fluorescence temperature sensor that measures temperature using a phosphor whose fluorescence characteristics change with temperature, and a failure determination method thereof.
  • Fluorescent temperature sensors using phosphors are widely used as temperature sensors (see, for example, Patent Document 1).
  • This fluorescence temperature sensor measures temperature by using a phosphor whose fluorescence characteristics change with temperature. Specifically, the fluorescent light generated by the phosphor is detected by irradiating the phosphor with excitation light from a light source. Then, the temperature is measured by a change in fluorescence characteristics such as the fluorescence lifetime of the detected fluorescence.
  • the fluorescence temperature sensor configured as described above, when the fluorescence temperature sensor fails, there is no failure determination method for determining which part is broken, and if the fluorescence temperature sensor is broken, the failure In order to identify the cause (failure site), the entire fluorescent temperature sensor had to be removed from the equipment and inspected for each part. For this reason, there is a problem that the efficiency of inspection is reduced because parts that do not need to be removed are removed.
  • the present invention has been made in order to solve the above-described problems.
  • the fluorescent temperature sensor can classify and identify a failure location and a failure determination method thereof.
  • the purpose is to provide.
  • a fluorescence temperature sensor includes a phosphor that emits fluorescence by excitation light, a light projecting unit that lights up the light source and projects excitation light onto the phosphor, a light receiving unit that receives the fluorescence of the phosphor, and a projector.
  • a fluorescence temperature sensor including an optical fiber that guides light between a light part, a light receiving part, and a phosphor, and a processing part that calculates the temperature of an object to be measured based on the amount of light received by the light receiving part, the processing part receives light
  • the failure of the fluorescent temperature sensor is determined by comparing the amount of received light in the unit with a threshold set in advance according to the operating state of the light projecting unit.
  • the failure point when the fluorescent temperature sensor fails during operation, the failure point can be quickly identified and identified, and the parts to be replaced can be identified early. The time until failure recovery can be shortened.
  • FIG. 1 is a diagram showing a configuration of a fluorescence temperature sensor 1 according to Embodiment 1 of the present invention.
  • a fluorescence temperature sensor 1 is brought into contact with a surface to be measured, a sensor probe 2 for emitting fluorescence according to temperature, and excitation light is projected onto the sensor probe 2.
  • a sensor module 3 for measuring the temperature of the surface to be measured from the amount of the received light.
  • the sensor probe 2 guides the phosphor 4 that emits fluorescence by the excitation light projected from the sensor module 3 and the excitation light projected by the sensor module 3 to the phosphor 4.
  • an optical fiber 5 connected between the sensor module 3 and the phosphor 4 and a cover 6 provided at the tip of the sensor probe 2 and covering the phosphor 4.
  • a protective tube 7 for protecting the optical fiber 5 from damage.
  • the optical fiber 5 is connected to the sensor module 3 by the optical fiber connector 8.
  • the sensor module 3 is controlled by the light projecting drive unit 9 to project excitation light onto the phosphor 4 provided on the sensor probe 2 and simultaneously projects the excitation light directly onto the light receiving unit 12.
  • a light receiving unit for receiving fluorescence emitted from the phosphor 4 provided in the sensor probe 2 and excitation light directly projected by the light projecting unit 10. 12 and a processing unit 13 for calculating the temperature of the surface to be measured based on the amount of light received by the light receiving unit 12.
  • the light projecting unit 10 and the light receiving unit 12 are accommodated in the holder 14.
  • the processing unit 13 performs a failure determination process of the fluorescent temperature sensor 1 by comparing a threshold value set in advance according to the operation state of the light projecting unit 10 and the amount of light received by the light receiving unit 12.
  • the failure determination process of the fluorescent temperature sensor 1 by the processing unit 13 is automatically performed every time the temperature is measured.
  • the processing unit 13 is configured to notify the externally connected notification unit 15 of failure information of the fluorescence temperature sensor 1 based on the result of the failure determination process of the fluorescence temperature sensor 1.
  • the notification unit 15 outputs sound and display for notifying the user of failure information of the fluorescent temperature sensor 1 based on the result of the failure determination process of the fluorescent temperature sensor 1 by the processing unit 13.
  • FIG. 2 is a diagram for explaining the amount of received light and the threshold value of the light receiving unit 12 according to Embodiment 1 of the present invention.
  • FIG. 2 shows the amount of light received by the light receiving unit 12, the horizontal axis is time, and the vertical axis is the amount of light.
  • the light receiving unit 12 projects the light immediately after projecting the excitation light directly onto the light receiving unit 12. Only the excitation light directly projected from the unit 10 is received. Thereafter, since the phosphor 4 emits fluorescence by the excitation light projected from the light projecting unit 10, the light receiving unit 12 also receives the fluorescence by the phosphor 4, and receives the excitation light and the mixed light of the fluorescence. The amount of light received increases.
  • the fluorescence by the phosphor 4 is saturated, and the light amount of the excitation light and the mixed light of the fluorescence received by the light receiving unit 12 is also a constant value.
  • the light receiving unit 12 loses the excitation light directly projected from the light projecting unit 10 and receives only the fluorescence emitted by the phosphor 4. The amount of light received decreases, and thereafter, the amount of light received by the light receiving unit 12 decreases as the fluorescence of the phosphor 4 is quenched.
  • a third threshold value V3 for the amount of fluorescence received is set in advance.
  • the surface of the cover 6 in which the phosphor 4 provided at the tip of the sensor probe 2 of the fluorescence temperature sensor 1 is housed is brought into contact with the surface to be measured.
  • excitation light is projected from the light projecting unit 10 onto the phosphor 4.
  • the phosphor 4 emits fluorescence by the excitation light projected from the light projecting unit 10.
  • the light receiving unit 12 receives the fluorescence emitted by the phosphor 4.
  • the amount of light received by the light receiving unit 12 at this time is measured by the processing unit 13 one by one.
  • the extinction speed of the phosphor 4 increases as the temperature increases.
  • the processing unit 13 measures the extinction speed of the phosphor 4 to measure the temperature of the surface to be measured.
  • the light receiving unit 12 also receives excitation light directly projected by the light projecting unit 10 in addition to the fluorescence emitted by the phosphor 4, but the amount of light received by the light receiving unit 12 after the light source of the light projecting unit 10 is turned off is Since only the amount of fluorescence is present, the temperature of the surface to be measured can be measured.
  • FIG. 3 is a flowchart for explaining a failure determination method for fluorescent temperature sensor 1 according to the first embodiment of the present invention.
  • the failure determination location of the fluorescence temperature sensor 1 is the “main part” that is the sensor module 3 part, and the “sensor part” that is the phosphor 4 and the optical fiber 5 part.
  • the failure determination process is performed at two locations.
  • the light projecting unit 10 projects excitation light (step ST1). That is, the light projecting unit 10 projects excitation light directly onto the light receiving unit 12 at the same time as projecting excitation light onto the phosphor 4.
  • the light receiving unit 12 receives the fluorescence emitted from the phosphor 4 and the excitation light directly projected from the light projecting unit 10, and the amount of light received by the light receiving unit 12 is sent to the processing unit 13.
  • this step ST1 corresponds to the excitation light projecting step of the present invention.
  • the processing unit 13 determines whether or not the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is greater than or equal to the first threshold value V1 (step ST2). That is, the processing unit 13 determines whether the excitation light amount received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is light is equal to or greater than a first threshold value V1 set in advance.
  • step ST2 a failure determination is made on the “main part” of the fluorescent temperature sensor 1. That is, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is greater than or equal to the first threshold value V1, the processing unit 13 determines that the “main body” is normal and the sequence is Proceed to step ST3. On the other hand, if it is determined that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is lighter than the first threshold value V1, it is determined that the “main body” is in failure and the sequence proceeds to step ST10. Thus, based on the comparison process in step ST2, it can be determined whether the fluorescence temperature sensor 1 has a failure. Here, this step ST2 corresponds to the first comparison step of the present invention. Hereinafter, a failure determination on the “sensor unit” of the fluorescent temperature sensor 1 is performed.
  • step ST ⁇ b> 2 determines in step ST ⁇ b> 2 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is equal to or greater than the first threshold value V ⁇ b> 1, that is, the “main body” is normal. Then, it is determined whether the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is equal to or greater than the second threshold value V2 (step ST3).
  • the processing unit 13 determines whether or not the amount of light mixed with the excitation light and the fluorescence received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is equal to or greater than a second threshold value V2 set in advance. judge.
  • step ST3 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is turned on is equal to or greater than the second threshold value V2, then the processing unit 13 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST4). That is, the processing unit 13 determines whether or not the amount of fluorescence received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is equal to or greater than a preset third threshold value V3.
  • step ST4 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is equal to or greater than the threshold value V3, the processing unit 13 also determines that the “sensor unit” is also normal. It is determined that the sensor 1 is operating normally (step ST5).
  • step ST4 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is off is less than the threshold value V3, the processing unit 13 determines that the periphery of the phosphor 4 is too hot, and the notification unit.
  • a sound and display indicating “outside temperature measurement range (high temperature)” are output to 15 (step ST6). That is, the light reception amount of the light receiving unit 12 after the light source of the light projecting unit 10 is turned on after the predetermined time has passed is equal to or greater than the second threshold value V2, and the light reception amount of the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is the third.
  • the threshold value V3 If it is less than the threshold value V3, it indicates that the rise and quenching of the fluorescence emitted by the phosphor 4 is too early because the temperature around the phosphor 4 is high. In this case, since the fluorescence quenching speed by the phosphor 4 is too fast with respect to the sampling rate, the measurement resolution is reduced, and the accurate fluorescence lifetime cannot be measured, and is determined to be “out of temperature measurement range (high temperature)”. To do.
  • step ST3 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is turned on, the processing unit 13 then determines that the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST7).
  • step ST7 if the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the processing unit 13 determines that the periphery of the phosphor 4 is too low, and the notification unit 15
  • the voice and display indicating “outside temperature measurement range (low temperature)” are output (step ST8). That is, the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is less than the second threshold V2, and the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is third.
  • the threshold value V3 is equal to or higher than the threshold value V3, it indicates that the rise of fluorescence is slow because the temperature around the phosphor 4 is low. In this case, since the fluorescence intensity is not reached until the fluorescence lifetime can be calculated, the accurate fluorescence lifetime cannot be measured, and is determined to be “out of temperature measurement range (low temperature)”.
  • step ST7 when the processing unit 13 determines in step ST7 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the processing unit 13 determines that the “sensor unit” is faulty and notifies the user.
  • the unit 15 is caused to output a sound and display indicating “sensor unit failure” (step ST9).
  • step ST ⁇ b> 2 determines that the amount of light received by the light receiving unit 12 immediately after the light source lighting of the light projecting unit 10 is less than the first threshold value V ⁇ b> 1, i.e., there is a defect in the “main body”. Then, it is determined whether the amount of light received by the light receiving unit 12 after the elapse of a predetermined time after the light source of the light projecting unit 10 is equal to or greater than the second threshold value V2 (step ST10).
  • step ST10 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is turned on, the processing unit 13 then determines that the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST11).
  • step ST11 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the processing unit 13 determines that the “sensor unit” is also malfunctioning, and 15 outputs a voice and display indicating “all site defects” (step ST12).
  • step ST11 when the processing unit 13 determines in step ST11 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the “sensor unit” is also defective and the phosphor 4 It is determined that the surroundings are too hot, and the notification unit 15 outputs a sound and a display indicating “all site defects” and “out of temperature measurement range (high temperature)” (step ST13).
  • step ST10 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after the light source of the light projecting unit 10 is turned on is less than the second threshold V2, the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST14).
  • step ST14 If the processing unit 13 determines in step ST14 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the “sensor unit” is also malfunctioning and the periphery of the phosphor 4 Is notified that the temperature is too low, and the notification unit 15 outputs a sound and a display indicating “all site defects” and “out of temperature measurement range (low temperature)” (step ST15).
  • step ST14 when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the processing unit 13 determines that the “sensor unit” is normal, and provides notification.
  • the unit 15 is caused to output a sound and display indicating “main body unit defect” (step ST16).
  • step ST3 and step ST10 correspond to the second comparison step of the present invention
  • step ST4 correspond to the third comparison step of the present invention.
  • the failure part of the fluorescence temperature sensor 1 can be quickly identified and identified during operation and should be replaced. Parts can be limited early and the time to failure recovery can be shortened.
  • the light projecting unit 10 is configured to project the excitation light directly onto the light receiving unit 12 while projecting the excitation light onto the phosphor 4.
  • the light projecting unit 10 does not directly project excitation light to the light receiving unit 12, and translucent reflection is performed between the phosphor 4 and the optical fiber 5.
  • the body 16 is provided, and a part of the excitation light projected on the phosphor 4 is reflected on the light receiving unit 12.
  • FIG. 4 is a diagram showing the configuration of the fluorescence temperature sensor 1 according to Embodiment 2 of the present invention.
  • the light projecting unit 10 is controlled by the light projecting driving unit 9 to project excitation light onto the phosphor 4 via the optical fiber 5.
  • the light projecting unit 10 is accommodated in the light projecting unit holder 14a.
  • the translucent reflector 16 is for reflecting a part of the excitation light guided by the optical fiber 5 and transmitting the rest, and as shown in FIG. It is provided between the optical fiber 5. A part of the excitation light projected by the light projecting unit 10 is reflected by the translucent reflector 16 and guided to the light receiving unit 12, and the rest is transmitted to the phosphor 4. Needless to say, when a part of the excitation light passes through the translucent reflector 16 and is sent to the phosphor 4, some absorption and attenuation of the excitation light by the translucent reflector 16 itself is caused. Since it is unavoidable, the above description does not indicate that all of the excitation light that is not reflected by the translucent reflector 16 is sent to the phosphor 4.
  • the light receiving unit 12 is controlled by the light receiving driving unit 11 to receive the fluorescence emitted from the phosphor 4 and receives the excitation light reflected by the translucent reflector 16.
  • the light receiving unit 12 is accommodated in the light receiving unit holder 14b.
  • the failure determination method for the fluorescent temperature sensor 1 according to Embodiment 2 of the present invention is the same as the failure determination method for the fluorescence temperature sensor 1 according to Embodiment 1 except for step ST1 in FIG.
  • a failure determination method for the fluorescent temperature sensor 1 according to Embodiment 2 of the present invention will also be described with reference to FIG.
  • the failure determination location of the fluorescence temperature sensor 1 is the “main body” that is the sensor module 3 and the optical fiber 5 portion, and the phosphor 4 portion. The failure determination process is performed at two locations of the “sensor unit”.
  • the light projecting unit 10 projects excitation light (step ST1). That is, the light projecting unit 10 projects excitation light onto the phosphor 4. A part of the excitation light projected by the light projecting unit 10 is reflected by the light transmissive reflector 16 to the light receiving unit 12, and the rest is transmitted through the light transmissive reflector 16 to the phosphor 4.
  • the light receiving unit 12 receives the excitation light reflected by the translucent reflector 15 and the fluorescence emitted from the phosphor 4, and the amount of light received by the light receiving unit 12 is measured by the processing unit 13 one by one.
  • step ST16 Since the subsequent comparison processing from step ST2 to step ST16 is the same as the failure determination method for the fluorescent temperature sensor 1 according to the first embodiment of the present invention, the description thereof is omitted.
  • the excitation light projected from the light projecting unit 10 is reflected by the translucent reflector 16 provided between the phosphor 4 and the optical fiber 5. Even if it is configured so that the failure determination process of the fluorescence temperature sensor 1 is performed by sending it to the light receiving unit 12, the same effect as that of the fluorescence temperature sensor 1 according to Embodiment 1 of the present invention can be obtained.
  • the failure determination process by the processing unit 13 has been described as being automatically performed every time the temperature is measured.
  • the processing unit 13 may be configured to execute the failure determination process only when the instruction is input. Alternatively, the processing unit 13 may be configured to execute the failure determination process every predetermined period.
  • the processing unit 13 determines whether or not to further stop the temperature measurement of the fluorescent temperature sensor 1 when it is determined that the fluorescent temperature sensor 1 has a defect by the failure determination process.
  • the measurement stop determination process for determining the FIG. 5 is a view for explaining measurement stop determination processing of the fluorescence temperature sensor 1 according to Embodiments 1 and 2 of the present invention.
  • the processing unit 13 determines that there is a failure in the fluorescence temperature sensor 1 by the failure determination method for the fluorescence temperature sensor 1 according to Embodiments 1 and 2 of the present invention, the failure determination count is counted by a counter (not shown). Then, in accordance with the count number and the operating state of the apparatus including the fluorescent temperature sensor 1, a determination process for determining whether or not to stop the temperature measurement of the fluorescent temperature sensor 1 is performed.
  • the processing unit 13 determines that there is a failure in the “sensor unit” of the fluorescence temperature sensor 1 while the apparatus including the fluorescence temperature sensor 1 is stopped. If the number of failure determinations is less than M times, the temperature measurement is continued, and if the number of failure determinations for the “sensor unit” is M times or more, the notification unit 15 outputs a sound and display indicating “a fear of sensor unit failure”. .
  • the processing unit 13 determines the number of failure determinations for the “main part”. Regardless of the temperature measurement of the fluorescent temperature sensor 1 is stopped.
  • the processing unit 13 determines that the number of failure determinations of the “sensor unit” is M times. If it is less, the temperature measurement is continued, and if the number of failure determinations of the “sensor unit” is M times or more, the notification unit 15 outputs a sound and a display indicating “a fear of sensor unit failure”.
  • the processing unit 13 determines that the number of failure determinations for the “body” is N times. If it is less than that, the notification unit 15 outputs a sound and display indicating “probable failure of the main body”, and if the number of times of failure determination is N times or more, temperature measurement of the fluorescent temperature sensor 1 is stopped.
  • the processing unit 13 counts the number of failure determinations, and determines whether or not to stop the temperature measurement of the fluorescence temperature sensor 1 according to the number of failure determinations and the operating state of the apparatus including the fluorescence temperature sensor 1. By configuring so as to determine, the temperature measurement of the fluorescent temperature sensor 1 can be stopped without affecting the operation of the apparatus including the fluorescent temperature sensor 1.
  • SYMBOLS 1 Fluorescence temperature sensor, 2 ... Sensor probe, 3 ... Sensor module, 4 ... Phosphor, 5 ... Optical fiber, 6 ... Cover, 7 ... Protection tube, 8 ... Optical fiber connector, 9 ... Light projection drive part, 10 ... Light projecting unit, 11... Light receiving drive unit, 12... Light receiving unit, 13 .. processing unit, 14 .. holder, 14 a... Light projecting unit holder, 14 b.

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  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

Provided are a fluorescence temperature sensor, which can demarcate and identify a failure portion when the fluorescence temperature sensor has the failure, and a method for determining the failure. The fluorescence temperature sensor (1) is provided with: a fluorescent body (4) which emits fluorescence by means of excitation light; a light projecting section (10) which turns on a light source and projects the excitation light to the fluorescent body (4); a light receiving section (12) which receives the fluorescence from the fluorescent body (4); an optical fiber (5) which guides light between the light projecting section (10) and the fluorescent body (4) and between the light receiving section (12) and the fluorescent body; and a processing section (13) which calculates the temperature of a subject to be measured, based on the quantity of light received by the light receiving section (12). The processing section (13) determines the failure of the fluorescence temperature sensor (1) by comparing the quantity of light received by the light receiving section (12) with a threshold previously set corresponding to the operation status of the light projecting section (10).

Description

蛍光温度センサ及びその故障判定方法Fluorescence temperature sensor and failure determination method thereof
　この発明は、温度により蛍光特性が変化する蛍光体を用いて温度を測定する蛍光温度センサ及びその故障判定方法に関するものである。 The present invention relates to a fluorescence temperature sensor that measures temperature using a phosphor whose fluorescence characteristics change with temperature, and a failure determination method thereof.
　温度センサとして、蛍光体を用いた蛍光温度センサが広く利用されている（例えば、特許文献１参照）。この蛍光温度センサは、温度により蛍光特性が変化する蛍光体を用いることにより温度を測定する。具体的には、光源からの励起光を蛍光体に照射して、蛍光体で発生した蛍光を検出する。そして、検出された蛍光の蛍光寿命などの蛍光特性の変化によって温度を測定する。 Fluorescent temperature sensors using phosphors are widely used as temperature sensors (see, for example, Patent Document 1). This fluorescence temperature sensor measures temperature by using a phosphor whose fluorescence characteristics change with temperature. Specifically, the fluorescent light generated by the phosphor is detected by irradiating the phosphor with excitation light from a light source. Then, the temperature is measured by a change in fluorescence characteristics such as the fluorescence lifetime of the detected fluorescence.
特開２００２－７１４７３号公報JP 2002-71473 A
　上記のように構成される蛍光温度センサでは、蛍光温度センサが故障したとき、どこの部位が故障しているのかを判定する故障判定方法はなく、蛍光温度センサが壊れた場合には、その故障原因（故障部位）を特定するため、蛍光温度センサ全体を装置から取り外し、部品ごとに点検する必要があった。そのため、本来は取り外さなくてもよい部品まで取り外してしまうため、点検の効率が落ちてしまうという課題があった。 In the fluorescence temperature sensor configured as described above, when the fluorescence temperature sensor fails, there is no failure determination method for determining which part is broken, and if the fluorescence temperature sensor is broken, the failure In order to identify the cause (failure site), the entire fluorescent temperature sensor had to be removed from the equipment and inspected for each part. For this reason, there is a problem that the efficiency of inspection is reduced because parts that do not need to be removed are removed.
　この発明は、上記のような課題を解決するためになされたもので、稼働中に、蛍光温度センサが故障した際に、故障箇所を区分・同定することができる蛍光温度センサ及びその故障判定方法を提供することを目的としている。 The present invention has been made in order to solve the above-described problems. When a fluorescent temperature sensor fails during operation, the fluorescent temperature sensor can classify and identify a failure location and a failure determination method thereof. The purpose is to provide.
　この発明に係る蛍光温度センサは、励起光により蛍光を発する蛍光体と、光源を点灯して蛍光体に励起光を投光する投光部と、蛍光体の蛍光を受光する受光部と、投光部及び受光部と蛍光体間の導光を行う光ファイバと、受光部の受光量に基づき、測定対象物の温度を算出する処理部とを備えた蛍光温度センサにおいて、処理部は、受光部における受光量と、投光部の動作状態に応じて予め設定される閾値とを比較することにより当該蛍光温度センサの故障を判定するものである。 A fluorescence temperature sensor according to the present invention includes a phosphor that emits fluorescence by excitation light, a light projecting unit that lights up the light source and projects excitation light onto the phosphor, a light receiving unit that receives the fluorescence of the phosphor, and a projector. In a fluorescence temperature sensor including an optical fiber that guides light between a light part, a light receiving part, and a phosphor, and a processing part that calculates the temperature of an object to be measured based on the amount of light received by the light receiving part, the processing part receives light The failure of the fluorescent temperature sensor is determined by comparing the amount of received light in the unit with a threshold set in advance according to the operating state of the light projecting unit.
　この発明によれば、上記のように構成したので、稼働中に、蛍光温度センサが故障した際に、故障箇所を素早く区分・同定することができ、交換すべき部品を早期に特定できるので、故障復旧までの時間を短縮することができる。 According to this invention, because it is configured as described above, when the fluorescent temperature sensor fails during operation, the failure point can be quickly identified and identified, and the parts to be replaced can be identified early. The time until failure recovery can be shortened.
この発明の実施の形態１に係る蛍光温度センサの構成を示す図である。It is a figure which shows the structure of the fluorescence temperature sensor which concerns on Embodiment 1 of this invention. この発明の実施の形態１における受光部の受光量及び閾値を説明するための図である。It is a figure for demonstrating the light reception amount and threshold value of the light-receiving part in Embodiment 1 of this invention. この発明の実施の形態１に係る蛍光温度センサの故障判定方法を説明するためのフローチャートである。It is a flowchart for demonstrating the failure determination method of the fluorescence temperature sensor which concerns on Embodiment 1 of this invention. この発明の実施の形態２に係る蛍光温度センサの構成を示す図である。It is a figure which shows the structure of the fluorescence temperature sensor which concerns on Embodiment 2 of this invention. この発明の実施の形態１，２に係る蛍光温度センサの測定停止判定処理を説明するための図である。It is a figure for demonstrating the measurement stop determination process of the fluorescence temperature sensor which concerns on Embodiment 1, 2 of this invention.
　以下、この発明の実施の形態について図面を参照しながら詳細に説明する。
（実施の形態１）
　図１はこの発明の実施の形態１に係る蛍光温度センサ１の構成を示す図である。
　図１に示すように、蛍光温度センサ１は、被測定面に接触させ、温度に応じた蛍光を発光するためのセンサプローブ２と、センサプローブ２に励起光を投光し、センサプローブ２からの蛍光を受光し、その受光量から被測定面の温度測定を行うためのセンサモジュール３とにより構成される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is a diagram showing a configuration of a fluorescence temperature sensor 1 according to Embodiment 1 of the present invention.
As shown in FIG. 1, a fluorescence temperature sensor 1 is brought into contact with a surface to be measured, a sensor probe 2 for emitting fluorescence according to temperature, and excitation light is projected onto the sensor probe 2. And a sensor module 3 for measuring the temperature of the surface to be measured from the amount of the received light.
　センサプローブ２は、図１に示すように、センサモジュール３より投光される励起光により蛍光を発光する蛍光体４と、センサモジュール３により投光される励起光を蛍光体４に導光し、蛍光体４が発する蛍光をセンサモジュール３に導光するため、センサモジュール３と蛍光体４間に接続される光ファイバ５と、センサプローブ２の先端に設けられ、蛍光体４を覆うカバー６と、光ファイバ５に傷が付かないように保護するための保護管７とにより構成される。ここで、光ファイバ５は光ファイバコネクタ８によりセンサモジュール３と接続される。 As shown in FIG. 1, the sensor probe 2 guides the phosphor 4 that emits fluorescence by the excitation light projected from the sensor module 3 and the excitation light projected by the sensor module 3 to the phosphor 4. In order to guide the fluorescence emitted from the phosphor 4 to the sensor module 3, an optical fiber 5 connected between the sensor module 3 and the phosphor 4 and a cover 6 provided at the tip of the sensor probe 2 and covering the phosphor 4. And a protective tube 7 for protecting the optical fiber 5 from damage. Here, the optical fiber 5 is connected to the sensor module 3 by the optical fiber connector 8.
　センサモジュール３は、図１に示すように、投光駆動部９により制御されて、センサプローブ２に設けられる蛍光体４に励起光を投光し、同時に受光部１２に励起光を直接投光するための投光部１０と、受光駆動部１１により制御されて、センサプローブ２に設けられる蛍光体４が発する蛍光及び投光部１０が直接する投光する励起光を受光するための受光部１２と、受光部１２が受光した受光量に基づいて、被測定面の温度を算出するための処理部１３とにより構成される。ここで、投光部１０及び受光部１２はホルダ１４内に収納される。 As shown in FIG. 1, the sensor module 3 is controlled by the light projecting drive unit 9 to project excitation light onto the phosphor 4 provided on the sensor probe 2 and simultaneously projects the excitation light directly onto the light receiving unit 12. And a light receiving unit for receiving fluorescence emitted from the phosphor 4 provided in the sensor probe 2 and excitation light directly projected by the light projecting unit 10. 12 and a processing unit 13 for calculating the temperature of the surface to be measured based on the amount of light received by the light receiving unit 12. Here, the light projecting unit 10 and the light receiving unit 12 are accommodated in the holder 14.
また、処理部１３は、投光部１０の動作状態に応じて予め設定される閾値と受光部１２が受光する受光量を比較することにより蛍光温度センサ１の故障判定処理を行う。ここで、この処理部１３による蛍光温度センサ１の故障判定処理は、温度測定の度に自動で行われるものである。
　また、処理部１３は蛍光温度センサ１の故障判定処理の結果に基づいて、外部接続されている報知部１５に蛍光温度センサ１の故障情報を報知させるように構成される。 Further, the processing unit 13 performs a failure determination process of the fluorescent temperature sensor 1 by comparing a threshold value set in advance according to the operation state of the light projecting unit 10 and the amount of light received by the light receiving unit 12. Here, the failure determination process of the fluorescent temperature sensor 1 by the processing unit 13 is automatically performed every time the temperature is measured.
Further, the processing unit 13 is configured to notify the externally connected notification unit 15 of failure information of the fluorescence temperature sensor 1 based on the result of the failure determination process of the fluorescence temperature sensor 1.
　報知部１５は、処理部１３による蛍光温度センサ１の故障判定処理の結果に基づいて、使用者に蛍光温度センサ１の故障情報を報知するための音声及び表示を出力するものである。 The notification unit 15 outputs sound and display for notifying the user of failure information of the fluorescent temperature sensor 1 based on the result of the failure determination process of the fluorescent temperature sensor 1 by the processing unit 13.
　次に、上記のように構成される蛍光温度センサ１の受光部１２の受光量及び処理部１３により予め設定される閾値について説明する。
　図２はこの発明の実施の形態１における受光部１２の受光量及び閾値を説明するための図である。この図２は、受光部１２の受光量を表したものであり、横軸は時間であり、縦軸は光量である。 Next, the amount of light received by the light receiving unit 12 of the fluorescence temperature sensor 1 configured as described above and the threshold value preset by the processing unit 13 will be described.
FIG. 2 is a diagram for explaining the amount of received light and the threshold value of the light receiving unit 12 according to Embodiment 1 of the present invention. FIG. 2 shows the amount of light received by the light receiving unit 12, the horizontal axis is time, and the vertical axis is the amount of light.
　図２に示すように、投光部１０が光源を点灯して蛍光体４に励起光を投光するのと同時に受光部１２に励起光を直接投光した直後では、受光部１２は投光部１０から直接投光される励起光のみを受光する。その後、蛍光体４は投光部１０から投光される励起光により蛍光を発光するため、受光部１２はこの蛍光体４による蛍光も受光し、励起光及び蛍光の混合光を受光することで受光量は増加する。その後、投光部１０が光源を点灯後所定時間経過した後では、蛍光体４による蛍光は飽和状態となり、受光部１２が受光する励起光及び蛍光の混合光の光量も一定の値となる。その後、投光部１０が光源を消灯した直後では、受光部１２は投光部１０から直接投光されていた励起光がなくなり、蛍光体４の発する蛍光のみを受光するため、受光部１２の受光量は減少し、その後、蛍光体４の蛍光の消光に伴って受光部１２の受光量は減少する。 As shown in FIG. 2, immediately after the light projecting unit 10 turns on the light source and projects the excitation light onto the phosphor 4, the light receiving unit 12 projects the light immediately after projecting the excitation light directly onto the light receiving unit 12. Only the excitation light directly projected from the unit 10 is received. Thereafter, since the phosphor 4 emits fluorescence by the excitation light projected from the light projecting unit 10, the light receiving unit 12 also receives the fluorescence by the phosphor 4, and receives the excitation light and the mixed light of the fluorescence. The amount of light received increases. Thereafter, after a predetermined time has elapsed after the light projecting unit 10 turns on the light source, the fluorescence by the phosphor 4 is saturated, and the light amount of the excitation light and the mixed light of the fluorescence received by the light receiving unit 12 is also a constant value. Thereafter, immediately after the light projecting unit 10 turns off the light source, the light receiving unit 12 loses the excitation light directly projected from the light projecting unit 10 and receives only the fluorescence emitted by the phosphor 4. The amount of light received decreases, and thereafter, the amount of light received by the light receiving unit 12 decreases as the fluorescence of the phosphor 4 is quenched.
　処理部１３では、図２に示すように、投光部１０の光源の動作状態に応じて、投光部１０が光源を点灯した直後に受光部１２が受光する励起光量に対する第１の閾値Ｖ１、投光部１０が光源を点灯後所定時間経過した後に受光部１２が受光する励起光及び蛍光の混合した光量に対する第２の閾値Ｖ２及び投光部１０が光源を消灯直後に受光部１２が受光する蛍光量に対する第３の閾値Ｖ３が予め設定される。 In the processing unit 13, as shown in FIG. 2, the first threshold value V <b> 1 with respect to the excitation light amount received by the light receiving unit 12 immediately after the light projecting unit 10 turns on the light source according to the operation state of the light source of the light projecting unit 10. The second threshold V2 with respect to the light quantity mixed with the excitation light and the fluorescence received by the light receiving unit 12 after a predetermined time has elapsed after the light projecting unit 10 turns on the light source, and the light receiving unit 12 immediately after the light projecting unit 10 turns off the light source. A third threshold value V3 for the amount of fluorescence received is set in advance.
　次に、上記のように構成される蛍光温度センサ１の温度測定について説明する。
　まず、蛍光温度センサ１のセンサプローブ２先端に設けられる蛍光体４が収納されるカバー６表面を被測定面に接触させる。次いで、投光部１０から励起光が蛍光体４に投光される。この投光部１０から投光された励起光により蛍光体４は蛍光を発光する。受光部１２はこの蛍光体４が発光する蛍光を受光している。このときの受光部１２が受光する受光量は、処理部１３により逐一計測されている。次いで、投光部１１は、蛍光体４への励起光の投光を停止する。これにより、蛍光体４は消光する。この蛍光体４の消光速度は温度が高くなるほど速くなる。この蛍光体４の消光速度を処理部１３が計測することにより、被測定面の温度を計測する。 Next, temperature measurement of the fluorescence temperature sensor 1 configured as described above will be described.
First, the surface of the cover 6 in which the phosphor 4 provided at the tip of the sensor probe 2 of the fluorescence temperature sensor 1 is housed is brought into contact with the surface to be measured. Next, excitation light is projected from the light projecting unit 10 onto the phosphor 4. The phosphor 4 emits fluorescence by the excitation light projected from the light projecting unit 10. The light receiving unit 12 receives the fluorescence emitted by the phosphor 4. The amount of light received by the light receiving unit 12 at this time is measured by the processing unit 13 one by one. Next, the light projecting unit 11 stops projecting excitation light to the phosphor 4. Thereby, the phosphor 4 is quenched. The extinction speed of the phosphor 4 increases as the temperature increases. The processing unit 13 measures the extinction speed of the phosphor 4 to measure the temperature of the surface to be measured.
　ここで、受光部１２は蛍光体４が発光する蛍光の他に投光部１０が直接投光する励起光も受光するが、投光部１０の光源消灯後での受光部１２の受光量は蛍光量のみとなるため、被測定面の温度測定を行うことができる。 Here, the light receiving unit 12 also receives excitation light directly projected by the light projecting unit 10 in addition to the fluorescence emitted by the phosphor 4, but the amount of light received by the light receiving unit 12 after the light source of the light projecting unit 10 is turned off is Since only the amount of fluorescence is present, the temperature of the surface to be measured can be measured.
　次に、上記のように構成される蛍光温度センサ１の故障判定方法について説明する。
　図３はこの発明の実施の形態１に係る蛍光温度センサ１の故障判定方法を説明するためのフローチャートである。
　この発明の実施の形態１に係る蛍光温度センサ１では、蛍光温度センサ１の故障判定箇所は、センサモジュール３部分である「本体部」と、蛍光体４及び光ファイバ５部分である「センサ部」の２箇所として故障判定処理を実施する。 Next, a failure determination method for the fluorescent temperature sensor 1 configured as described above will be described.
FIG. 3 is a flowchart for explaining a failure determination method for fluorescent temperature sensor 1 according to the first embodiment of the present invention.
In the fluorescence temperature sensor 1 according to the first embodiment of the present invention, the failure determination location of the fluorescence temperature sensor 1 is the “main part” that is the sensor module 3 part, and the “sensor part” that is the phosphor 4 and the optical fiber 5 part. The failure determination process is performed at two locations.
　まず、故障判定処理では、投光部１０は励起光を投光する（ステップＳＴ１）。すなわち、投光部１０は蛍光体４に励起光を投光するのと同時に、受光部１２に対しても励起光を直接投光する。受光部１２は蛍光体４から発せられる蛍光及び投光部１０から直接投光される励起光を受光し、この受光部１２による受光量は処理部１３に送られる。
　ここで、このステップＳＴ１はこの発明の励起光投光ステップに対応する。 First, in the failure determination process, the light projecting unit 10 projects excitation light (step ST1). That is, the light projecting unit 10 projects excitation light directly onto the light receiving unit 12 at the same time as projecting excitation light onto the phosphor 4. The light receiving unit 12 receives the fluorescence emitted from the phosphor 4 and the excitation light directly projected from the light projecting unit 10, and the amount of light received by the light receiving unit 12 is sent to the processing unit 13.
Here, this step ST1 corresponds to the excitation light projecting step of the present invention.
　次いで、処理部１３は投光部１０の光源点灯直後での受光部１２の受光量が第１の閾値Ｖ１以上であるかを判定する（ステップＳＴ２）。すなわち、処理部１３は、投光部１０の光源点灯直後における受光部１２が受光する励起光量が、予め設定される第１の閾値Ｖ１以上であるかを判定する。 Next, the processing unit 13 determines whether or not the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is greater than or equal to the first threshold value V1 (step ST2). That is, the processing unit 13 determines whether the excitation light amount received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is light is equal to or greater than a first threshold value V1 set in advance.
　このステップＳＴ２により、蛍光温度センサ１の「本体部」についての故障判定を行う。すなわち、処理部１３は、投光部１０の光源点灯直後での受光部１２の受光量が第１の閾値Ｖ１以上であると判定すると、「本体部」は正常であると判定してシーケンスはステップＳＴ３に進む。一方、投光部１０の光源点灯直後での受光部１２の受光量が第１の閾値Ｖ１未満であると判定すると、「本体部」が故障であると判定してシーケンスはステップＳＴ１０に進む。このようにステップＳＴ２における比較処理に基づいて、蛍光温度センサ１に故障があるかを判定することができる。ここで、このステップＳＴ２はこの発明の第１比較ステップに対応する。
　以下、蛍光温度センサ１の「センサ部」についての故障判定を行う。 In step ST2, a failure determination is made on the “main part” of the fluorescent temperature sensor 1. That is, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is greater than or equal to the first threshold value V1, the processing unit 13 determines that the “main body” is normal and the sequence is Proceed to step ST3. On the other hand, if it is determined that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is lighter than the first threshold value V1, it is determined that the “main body” is in failure and the sequence proceeds to step ST10. Thus, based on the comparison process in step ST2, it can be determined whether the fluorescence temperature sensor 1 has a failure. Here, this step ST2 corresponds to the first comparison step of the present invention.
Hereinafter, a failure determination on the “sensor unit” of the fluorescent temperature sensor 1 is performed.
　上記ステップＳＴ２において、処理部１３は、投光部１０の光源点灯直後での受光部１２の受光量が第１の閾値Ｖ１以上である、すなわち「本体部」は正常であると判定すると、次いで、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２以上であるかを判定する（ステップＳＴ３）。すなわち、処理部１３は、投光部１０の光源点灯後所定時間経過後における受光部１２が受光する励起光及び蛍光が混合した光量が、予め設定される第２の閾値Ｖ２以上であるかを判定する。 When the processing unit 13 determines in step ST <b> 2 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned on is equal to or greater than the first threshold value V <b> 1, that is, the “main body” is normal, Then, it is determined whether the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is equal to or greater than the second threshold value V2 (step ST3). That is, the processing unit 13 determines whether or not the amount of light mixed with the excitation light and the fluorescence received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is equal to or greater than a second threshold value V2 set in advance. judge.
　このステップＳＴ３において、処理部１３は、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２以上であると判定すると、次いで、投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３以上であるかを判定する（ステップＳＴ４）。すなわち、処理部１３は、投光部１０の光源消灯直後における受光部１２が受光した蛍光量が、予め設定される第３の閾値Ｖ３以上であるかを判定する。 In this step ST3, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is turned on is equal to or greater than the second threshold value V2, then the processing unit 13 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST4). That is, the processing unit 13 determines whether or not the amount of fluorescence received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is equal to or greater than a preset third threshold value V3.
　このステップＳＴ４において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３以上であると判定すると、「センサ部」も正常であると判定し、蛍光温度センサ１は正常に動作していると判定する（ステップＳＴ５）。 In this step ST4, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is equal to or greater than the threshold value V3, the processing unit 13 also determines that the “sensor unit” is also normal. It is determined that the sensor 1 is operating normally (step ST5).
　一方、ステップＳＴ４において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３未満であると判定すると、蛍光体４周辺が高温すぎると判定し、報知部１５に「温度測定範囲外（高温）」を示す音声及び表示を出力させる（ステップＳＴ６）。すなわち、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２以上、かつ投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３未満である場合は、蛍光体４周辺の温度が高温であるために蛍光体４が発光する蛍光の立ち上がり及び消光が早すぎることを示している。この場合、蛍光体４による蛍光の消光速度がサンプリングレートに対して速すぎるため、測定分解能が低下し、正確な蛍光寿命を測定することができず、「温度測定範囲外（高温）」と判定する。 On the other hand, in step ST4, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is off is less than the threshold value V3, the processing unit 13 determines that the periphery of the phosphor 4 is too hot, and the notification unit. A sound and display indicating “outside temperature measurement range (high temperature)” are output to 15 (step ST6). That is, the light reception amount of the light receiving unit 12 after the light source of the light projecting unit 10 is turned on after the predetermined time has passed is equal to or greater than the second threshold value V2, and the light reception amount of the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is the third. If it is less than the threshold value V3, it indicates that the rise and quenching of the fluorescence emitted by the phosphor 4 is too early because the temperature around the phosphor 4 is high. In this case, since the fluorescence quenching speed by the phosphor 4 is too fast with respect to the sampling rate, the measurement resolution is reduced, and the accurate fluorescence lifetime cannot be measured, and is determined to be “out of temperature measurement range (high temperature)”. To do.
　上記ステップＳＴ３において、処理部１３は、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２未満であると判定すると、次いで、投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３以上であるかを判定する（ステップＳＴ７）。 In step ST3, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is turned on, the processing unit 13 then determines that the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST7).
　このステップＳＴ７において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３以上であると判定すると、蛍光体４周辺が低温すぎると判定し、報知部１５に「温度測定範囲外（低温）」を示す音声及び表示を出力させる（ステップＳＴ８）。すなわち、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２未満、かつ投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３以上である場合は、蛍光体４周辺の温度が低温であるために蛍光の立ち上がりが遅いことを示している。この場合、蛍光寿命を算出できるまでの蛍光強度に達していないため、正確な蛍光寿命を測定することができず、「温度測定範囲外（低温）」と判定する。 In step ST7, if the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the processing unit 13 determines that the periphery of the phosphor 4 is too low, and the notification unit 15 The voice and display indicating “outside temperature measurement range (low temperature)” are output (step ST8). That is, the amount of light received by the light receiving unit 12 after the lapse of a predetermined time after the light source of the light projecting unit 10 is less than the second threshold V2, and the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is third. When the threshold value V3 is equal to or higher than the threshold value V3, it indicates that the rise of fluorescence is slow because the temperature around the phosphor 4 is low. In this case, since the fluorescence intensity is not reached until the fluorescence lifetime can be calculated, the accurate fluorescence lifetime cannot be measured, and is determined to be “out of temperature measurement range (low temperature)”.
　一方、ステップＳＴ７において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３未満であると判定すると、「センサ部」が故障であると判定し、報知部１５に「センサ部不具合」を示す音声及び表示を出力させる（ステップＳＴ９）。 On the other hand, when the processing unit 13 determines in step ST7 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the processing unit 13 determines that the “sensor unit” is faulty and notifies the user. The unit 15 is caused to output a sound and display indicating “sensor unit failure” (step ST9).
　上記ステップＳＴ２において、処理部１３は、投光部１０の光源点灯直後での受光部１２の受光量が第１の閾値Ｖ１未満である、すなわち「本体部」に不具合があると判定すると、次いで、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２以上であるかを判定する（ステップＳＴ１０）。 When the processing unit 13 determines in step ST <b> 2 that the amount of light received by the light receiving unit 12 immediately after the light source lighting of the light projecting unit 10 is less than the first threshold value V <b> 1, i.e., there is a defect in the “main body”. Then, it is determined whether the amount of light received by the light receiving unit 12 after the elapse of a predetermined time after the light source of the light projecting unit 10 is equal to or greater than the second threshold value V2 (step ST10).
　このステップＳＴ１０において、処理部１３は、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２以上であると判定すると、次いで、投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３以上であるかを判定する（ステップＳＴ１１）。 In step ST10, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after a predetermined time has elapsed after the light source of the light projecting unit 10 is turned on, the processing unit 13 then determines that the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST11).
　このステップＳＴ１１において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３以上であると判定すると、「センサ部」も故障であると判定し、報知部１５に「全部位不具合」を示す音声及び表示を出力させる（ステップＳＴ１２）。 In step ST11, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the processing unit 13 determines that the “sensor unit” is also malfunctioning, and 15 outputs a voice and display indicating “all site defects” (step ST12).
　一方、ステップＳＴ１１において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３未満であると判定すると、「センサ部」も故障であり、かつ蛍光体４周辺が高温すぎると判定し、報知部１５に「全部位不具合」及び「温度測定範囲外（高温）」を示す音声及び表示を出力させる（ステップＳＴ１３）。 On the other hand, when the processing unit 13 determines in step ST11 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the “sensor unit” is also defective and the phosphor 4 It is determined that the surroundings are too hot, and the notification unit 15 outputs a sound and a display indicating “all site defects” and “out of temperature measurement range (high temperature)” (step ST13).
　上記ステップＳＴ１０において、処理部１３は、投光部１０の光源点灯後所定時間経過後での受光部１２の受光量が第２の閾値Ｖ２未満であると判定すると、次いで、投光部１０の光源消灯直後での受光部１２の受光量が第３の閾値Ｖ３以上であるかを判定する（ステップＳＴ１４）。 In step ST10, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 after the light source of the light projecting unit 10 is turned on is less than the second threshold V2, the light projecting unit 10 It is determined whether the amount of light received by the light receiving unit 12 immediately after the light source is turned off is greater than or equal to the third threshold value V3 (step ST14).
　このステップＳＴ１４において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３以上であると判定すると、「センサ部」も故障であり、かつ蛍光体４周辺が低温すぎると判定し、報知部１５に「全部位不具合」及び「温度測定範囲外（低温）」を示す音声及び表示を出力させる（ステップＳＴ１５）。 If the processing unit 13 determines in step ST14 that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is greater than or equal to the threshold value V3, the “sensor unit” is also malfunctioning and the periphery of the phosphor 4 Is notified that the temperature is too low, and the notification unit 15 outputs a sound and a display indicating “all site defects” and “out of temperature measurement range (low temperature)” (step ST15).
　一方、ステップＳＴ１４において、処理部１３は、投光部１０の光源消灯直後での受光部１２の受光量が閾値Ｖ３未満であると判定すると、「センサ部」は正常であると判定し、報知部１５に「本体部不具合」を示す音声及び表示を出力させる（ステップＳＴ１６）。 On the other hand, in step ST14, when the processing unit 13 determines that the amount of light received by the light receiving unit 12 immediately after the light source of the light projecting unit 10 is turned off is less than the threshold value V3, the processing unit 13 determines that the “sensor unit” is normal, and provides notification. The unit 15 is caused to output a sound and display indicating “main body unit defect” (step ST16).
　このようにステップＳＴ２からステップＳＴ１６における比較処理に基づいて、蛍光温度センサ１の故障箇所を特定することができる。ここで、ステップＳＴ３及びステップＳＴ１０はこの発明の第２比較ステップに対応し、ステップＳＴ４、ステップＳＴ７、ステップＳＴ１１及びステップＳＴ１４はこの発明の第３比較ステップに対応する。 Thus, based on the comparison process from step ST2 to step ST16, the failure location of the fluorescence temperature sensor 1 can be specified. Here, step ST3 and step ST10 correspond to the second comparison step of the present invention, and step ST4, step ST7, step ST11 and step ST14 correspond to the third comparison step of the present invention.
　以上のように、この発明の実施の形態１によれば、投光部１０の光源の点灯直後、点灯後所定時間経過後、消灯直後に対応する受光部１２の受光量と第１の閾値から第３の閾値との比較処理により当該蛍光温度センサ１の故障部位を特定するように構成したので、稼働中に、蛍光温度センサ１の故障箇所をすばやく区分・同定することができ、交換すべき部品を早期に限定でき、故障復旧までの時間を短縮することができる。 As described above, according to the first embodiment of the present invention, from the amount of light received by the light receiving unit 12 and the first threshold value immediately after the light source of the light projecting unit 10 is turned on, after a predetermined time has elapsed after lighting, and immediately after the light is turned off. Since the failure part of the fluorescence temperature sensor 1 is specified by the comparison process with the third threshold value, the failure part of the fluorescence temperature sensor 1 can be quickly identified and identified during operation and should be replaced. Parts can be limited early and the time to failure recovery can be shortened.
（実施の形態２）
　この発明の実施の形態１に係る蛍光温度センサ１では、投光部１０は蛍光体４に励起光を投光するのと同時に、受光部１２に励起光を直接投光するように構成したが、この発明の実施の形態２に係る蛍光温度センサ１では、投光部１０は受光部１２には励起光を直接投光せず、蛍光体４と光ファイバ５との間に透光性反射体１６を設けて、蛍光体４に投光される励起光の一部を受光部１２に反射させるように構成したものである。
　図４はこの発明の実施の形態２に係る蛍光温度センサ１の構成を示す図である。
　以下、図１のこの発明の実施の形態１に係る蛍光温度センサ１と同一または同様の構成については、同一の符号を付しその説明を省略する。 (Embodiment 2)
In the fluorescence temperature sensor 1 according to the first embodiment of the present invention, the light projecting unit 10 is configured to project the excitation light directly onto the light receiving unit 12 while projecting the excitation light onto the phosphor 4. In the fluorescence temperature sensor 1 according to the second embodiment of the present invention, the light projecting unit 10 does not directly project excitation light to the light receiving unit 12, and translucent reflection is performed between the phosphor 4 and the optical fiber 5. The body 16 is provided, and a part of the excitation light projected on the phosphor 4 is reflected on the light receiving unit 12.
FIG. 4 is a diagram showing the configuration of the fluorescence temperature sensor 1 according to Embodiment 2 of the present invention.
Hereinafter, the same or similar configurations as those of the fluorescence temperature sensor 1 according to Embodiment 1 of the present invention shown in FIG.
　投光部１０は、投光駆動部９により制御されて、光ファイバ５を介して蛍光体４に励起光を投光する。この投光部１０は投光部ホルダ１４ａに収納される。 The light projecting unit 10 is controlled by the light projecting driving unit 9 to project excitation light onto the phosphor 4 via the optical fiber 5. The light projecting unit 10 is accommodated in the light projecting unit holder 14a.
　透光性反射体１６は、光ファイバ５により導光される励起光の一部を反射し、残りを透過させるためのものであり、図４に示すように、センサプローブ２の蛍光体４と光ファイバ５との間に設けられている。投光部１０により投光される励起光は、この透光性反射体１６により、一部が反射されて受光部１２に導光され、残りは透過して蛍光体４に送られる。なお、言うまでもないことであるが、励起光の一部が透光性反射体１６を透過して蛍光体４に送られるにあたって、透光性反射体１６自体による若干の励起光の吸収・減衰は不可避であるため、前述の記載は透光性反射体１６において反射されなかった励起光の全てが蛍光体４に送られることを示すものではない。 The translucent reflector 16 is for reflecting a part of the excitation light guided by the optical fiber 5 and transmitting the rest, and as shown in FIG. It is provided between the optical fiber 5. A part of the excitation light projected by the light projecting unit 10 is reflected by the translucent reflector 16 and guided to the light receiving unit 12, and the rest is transmitted to the phosphor 4. Needless to say, when a part of the excitation light passes through the translucent reflector 16 and is sent to the phosphor 4, some absorption and attenuation of the excitation light by the translucent reflector 16 itself is caused. Since it is unavoidable, the above description does not indicate that all of the excitation light that is not reflected by the translucent reflector 16 is sent to the phosphor 4.
　受光部１２は、受光駆動部１１により制御されて、蛍光体４が発する蛍光を受光し、また、透光性反射体１６により反射された励起光を受光する。この受光部１２は受光部ホルダ１４ｂに収納される。 The light receiving unit 12 is controlled by the light receiving driving unit 11 to receive the fluorescence emitted from the phosphor 4 and receives the excitation light reflected by the translucent reflector 16. The light receiving unit 12 is accommodated in the light receiving unit holder 14b.
　次に、上記のように構成される蛍光温度センサ１の故障判定方法について説明する。
　この発明の実施の形態２に係る蛍光温度センサ１の故障判定方法は、図３のステップＳＴ１を除き、実施の形態１に係る蛍光温度センサ１の故障判定方法と同じである。以下では、この発明の実施の形態２に係る蛍光温度センサ１の故障判定方法についても図３を参照して説明する。
　また、この発明の実施の形態２に係る蛍光温度センサ１では、蛍光温度センサ１の故障判定箇所は、センサモジュール３及び光ファイバ５部分である「本体部」と、蛍光体４部分である「センサ部」の２箇所として故障判定処理を実施する。 Next, a failure determination method for the fluorescent temperature sensor 1 configured as described above will be described.
The failure determination method for the fluorescent temperature sensor 1 according to Embodiment 2 of the present invention is the same as the failure determination method for the fluorescence temperature sensor 1 according to Embodiment 1 except for step ST1 in FIG. Hereinafter, a failure determination method for the fluorescent temperature sensor 1 according to Embodiment 2 of the present invention will also be described with reference to FIG.
Further, in the fluorescence temperature sensor 1 according to Embodiment 2 of the present invention, the failure determination location of the fluorescence temperature sensor 1 is the “main body” that is the sensor module 3 and the optical fiber 5 portion, and the phosphor 4 portion. The failure determination process is performed at two locations of the “sensor unit”.
　故障判定処理では、投光部１０は励起光を投光する（ステップＳＴ１）。すなわち、投光部１０は蛍光体４に励起光を投光する。この投光部１０により投光された励起光は透光性反射体１６により一部が受光部１２に反射され、残りは透光性反射体１６を透過し蛍光体４に送られる。受光部１２は透光性反射体１５により反射される励起光及び蛍光体４から発せられる蛍光を受光し、この受光部１２による受光量は処理部１３に逐一計測される。 In the failure determination process, the light projecting unit 10 projects excitation light (step ST1). That is, the light projecting unit 10 projects excitation light onto the phosphor 4. A part of the excitation light projected by the light projecting unit 10 is reflected by the light transmissive reflector 16 to the light receiving unit 12, and the rest is transmitted through the light transmissive reflector 16 to the phosphor 4. The light receiving unit 12 receives the excitation light reflected by the translucent reflector 15 and the fluorescence emitted from the phosphor 4, and the amount of light received by the light receiving unit 12 is measured by the processing unit 13 one by one.
　以後のステップＳＴ２からステップＳＴ１６における比較処理については、この発明の実施の形態１に係る蛍光温度センサ１の故障判定方法と同一であるため、その説明を省略する。 Since the subsequent comparison processing from step ST2 to step ST16 is the same as the failure determination method for the fluorescent temperature sensor 1 according to the first embodiment of the present invention, the description thereof is omitted.
　以上のように、この発明の実施の形態２によれば、投光部１０から投光される励起光を蛍光体４と光ファイバ５との間に設けられる透光性反射体１６により反射させて受光部１２に送り、蛍光温度センサ１の故障判定処理を行うように構成しても、この発明の実施の形態１に係る蛍光温度センサ１と同様の効果を得ることができる。 As described above, according to the second embodiment of the present invention, the excitation light projected from the light projecting unit 10 is reflected by the translucent reflector 16 provided between the phosphor 4 and the optical fiber 5. Even if it is configured so that the failure determination process of the fluorescence temperature sensor 1 is performed by sending it to the light receiving unit 12, the same effect as that of the fluorescence temperature sensor 1 according to Embodiment 1 of the present invention can be obtained.
　また、この発明の実施の形態１，２に係る蛍光温度センサ１では、処理部１３による故障判定処理は温度測定の度に自動で行われるものとして説明したが、これに限るものではなく、所定の命令を入力したときのみ処理部１３に故障判定処理を実行させるように構成してもよく、また、所定の期間ごとに処理部１３に故障判定処理を実行させるように構成してもよい。 In the fluorescence temperature sensor 1 according to Embodiments 1 and 2 of the present invention, the failure determination process by the processing unit 13 has been described as being automatically performed every time the temperature is measured. However, the present invention is not limited to this. The processing unit 13 may be configured to execute the failure determination process only when the instruction is input. Alternatively, the processing unit 13 may be configured to execute the failure determination process every predetermined period.
　また、この発明の実施の形態１，２において、処理部１３は、故障判定処理により蛍光温度センサ１に不具合があると判定した場合に、さらに蛍光温度センサ１の温度測定を停止させるか否かを判定する測定停止判定処理を実施するように構成してもよい。
　図５はこの発明の実施の形態１，２に係る蛍光温度センサ１の測定停止判定処理を説明するための図である。 In the first and second embodiments of the present invention, the processing unit 13 determines whether or not to further stop the temperature measurement of the fluorescent temperature sensor 1 when it is determined that the fluorescent temperature sensor 1 has a defect by the failure determination process. The measurement stop determination process for determining the
FIG. 5 is a view for explaining measurement stop determination processing of the fluorescence temperature sensor 1 according to Embodiments 1 and 2 of the present invention.
　この発明の実施の形態１，２に係る蛍光温度センサ１の故障判定方法により、処理部１３は、蛍光温度センサ１に故障があると判定した場合、不図示のカウンタによりその故障判定回数をカウントし、そのカウント数及び蛍光温度センサ１を備えた装置の動作状態に応じて、蛍光温度センサ１の温度測定を停止させるか否かの判定処理を実施する。 When the processing unit 13 determines that there is a failure in the fluorescence temperature sensor 1 by the failure determination method for the fluorescence temperature sensor 1 according to Embodiments 1 and 2 of the present invention, the failure determination count is counted by a counter (not shown). Then, in accordance with the count number and the operating state of the apparatus including the fluorescent temperature sensor 1, a determination process for determining whether or not to stop the temperature measurement of the fluorescent temperature sensor 1 is performed.
　図５に示すように、蛍光温度センサ１を備えた装置が停止中に蛍光温度センサ１の「センサ部」に故障があると判定された場合おいて、処理部１３は、「センサ部」の故障判定回数がＭ回未満であれば温度測定を続行させ、「センサ部」の故障判定回数がＭ回以上であれば報知部１５に「センサ部故障の恐れ」を示す音声及び表示を出力させる。 As shown in FIG. 5, when it is determined that there is a failure in the “sensor unit” of the fluorescence temperature sensor 1 while the apparatus including the fluorescence temperature sensor 1 is stopped, the processing unit 13 If the number of failure determinations is less than M times, the temperature measurement is continued, and if the number of failure determinations for the “sensor unit” is M times or more, the notification unit 15 outputs a sound and display indicating “a fear of sensor unit failure”. .
　また、蛍光温度センサ１を備えた装置が動作を停止中に蛍光温度センサ１の「本体部」に故障があると判定された場合において、処理部１３は、「本体部」の故障判定回数に関係なく蛍光温度センサ１の温度測定を停止させる。 In addition, when it is determined that there is a failure in the “main part” of the fluorescent temperature sensor 1 while the operation of the apparatus including the fluorescent temperature sensor 1 is stopped, the processing unit 13 determines the number of failure determinations for the “main part”. Regardless of the temperature measurement of the fluorescent temperature sensor 1 is stopped.
　また、蛍光温度センサ１を備えた装置が動作中に蛍光温度センサ１の「センサ部」に故障があると判定された場合において、処理部１３は、「センサ部」の故障判定回数がＭ回未満であれば温度測定を続行させ、「センサ部」の故障判定回数がＭ回以上であれば報知部１５に 「センサ部故障の恐れ」を示す音声及び表示を出力させる。 When it is determined that there is a failure in the “sensor unit” of the fluorescence temperature sensor 1 while the apparatus including the fluorescence temperature sensor 1 is in operation, the processing unit 13 determines that the number of failure determinations of the “sensor unit” is M times. If it is less, the temperature measurement is continued, and if the number of failure determinations of the “sensor unit” is M times or more, the notification unit 15 outputs a sound and a display indicating “a fear of sensor unit failure”.
　また、蛍光温度センサ１を備えた装置が動作中に蛍光温度センサ１の「本体部」に故障があると判定された場合において、処理部１３は、「本体部」の故障判定回数がＮ回未満であれば報知部１５に「本体部故障の恐れ」を示す音声及び表示を出力させ、故障判定回数がＮ回以上であれば蛍光温度センサ１の温度測定を停止させる。 Further, when it is determined that there is a failure in the “body” of the fluorescence temperature sensor 1 while the apparatus including the fluorescence temperature sensor 1 is in operation, the processing unit 13 determines that the number of failure determinations for the “body” is N times. If it is less than that, the notification unit 15 outputs a sound and display indicating “probable failure of the main body”, and if the number of times of failure determination is N times or more, temperature measurement of the fluorescent temperature sensor 1 is stopped.
　以上のように、処理部１３は故障判定回数をカウントし、その故障判定回数及び蛍光温度センサ１を備えた装置の動作状態に応じて、蛍光温度センサ１の温度測定を停止させるか否かを判定するように構成することで、蛍光温度センサ１を備えた装置の動作に影響を及ぼすことなく蛍光温度センサ１の温度測定を停止させることができる。 As described above, the processing unit 13 counts the number of failure determinations, and determines whether or not to stop the temperature measurement of the fluorescence temperature sensor 1 according to the number of failure determinations and the operating state of the apparatus including the fluorescence temperature sensor 1. By configuring so as to determine, the temperature measurement of the fluorescent temperature sensor 1 can be stopped without affecting the operation of the apparatus including the fluorescent temperature sensor 1.
１…蛍光温度センサ、２…センサプローブ、３…センサモジュール、４…蛍光体、５…光ファイバ、６…カバー、７…保護管、８…光ファイバコネクタ、９…投光駆動部、１０…投光部、１１…受光駆動部、１２…受光部、１３…処理部、１４…ホルダ、１４ａ…投光部ホルダ、１４ｂ…受光部ホルダ、１５…報知部、１６…透光性反射体 DESCRIPTION OF SYMBOLS 1 ... Fluorescence temperature sensor, 2 ... Sensor probe, 3 ... Sensor module, 4 ... Phosphor, 5 ... Optical fiber, 6 ... Cover, 7 ... Protection tube, 8 ... Optical fiber connector, 9 ... Light projection drive part, 10 ... Light projecting unit, 11... Light receiving drive unit, 12... Light receiving unit, 13 .. processing unit, 14 .. holder, 14 a... Light projecting unit holder, 14 b.

Claims (7)

  1. 　励起光により蛍光を発する蛍光体と、
    　光源を点灯して前記蛍光体に励起光を投光する投光部と、
    　前記蛍光体の蛍光を受光する受光部と、
    　前記投光部及び前記受光部と前記蛍光体間の導光を行う光ファイバと、
    　前記受光部の受光量に基づき、測定対象物の温度を算出する処理部と、を備え、
    　前記処理部は、前記受光部における受光量と前記投光部の動作状態に応じて予め設定される閾値とを比較することにより当該蛍光温度センサの故障を判定する、
    蛍光温度センサ。     A phosphor that emits fluorescence by excitation light;
    A light projecting unit that turns on a light source and projects excitation light onto the phosphor;
    A light receiving portion for receiving fluorescence of the phosphor;
    An optical fiber for guiding light between the light projecting unit and the light receiving unit and the phosphor;
    A processing unit that calculates the temperature of the measurement object based on the amount of light received by the light receiving unit,
    The processing unit determines a failure of the fluorescence temperature sensor by comparing a received light amount in the light receiving unit and a threshold set in advance according to an operation state of the light projecting unit.
    Fluorescent temperature sensor.
  2. 　前記投光部は前記受光部に励起光を直接投光し、
    　前記受光部は前記蛍光体からの蛍光を受光するのと同時に、前記投光部から投光される励起光を受光する、
    請求項１記載の蛍光温度センサ。     The light projecting unit directly projects excitation light onto the light receiving unit,
    The light receiving unit receives the excitation light emitted from the light projecting unit simultaneously with receiving the fluorescence from the phosphor,
    The fluorescence temperature sensor according to claim 1.
  3. 　前記蛍光体と前記光ファイバ間に配置され、前記光ファイバから導光される励起光の一部を反射し、残りを透過させる透光性反射体を備え、
    　前記受光部は前記蛍光体からの蛍光を受光するのと同時に、前記透光性反射体により反射される前記投光部からの励起光を受光する、
    請求項１記載の蛍光温度センサ。     A translucent reflector that is disposed between the phosphor and the optical fiber, reflects a portion of the excitation light guided from the optical fiber, and transmits the remainder;
    The light receiving unit receives the excitation light from the light projecting unit reflected by the translucent reflector at the same time as receiving the fluorescence from the phosphor.
    The fluorescence temperature sensor according to claim 1.
  4. 　前記処理部により故障があると判定された場合に外部に故障情報を音声及び表示により報知するための報知部を備える、
    請求項１から請求項３のうちいずれか１項記載の蛍光温度センサ。     When it is determined by the processing unit that there is a failure, a failure notification unit is provided for notifying failure information by voice and display to the outside.
    The fluorescence temperature sensor according to any one of claims 1 to 3.
  5. 　前記処理部は、故障と判定された回数及び当該蛍光温度センサを備えた装置の動作状態に応じて温度測定を停止させる、
    請求項１から請求項４のうちいずれか１項記載の蛍光温度センサ。     The processing unit stops temperature measurement according to the number of times determined to be a failure and the operating state of the apparatus including the fluorescent temperature sensor.
    The fluorescence temperature sensor according to any one of claims 1 to 4.
  6. 　励起光により蛍光を発する蛍光体と、光源を点灯して前記蛍光体に励起光を投光する投光部と、前記蛍光体の蛍光を受光する受光部と、前記投光部及び前記受光部と前記蛍光体間の導光を行う光ファイバと、前記受光部の受光量に基づき測定対象物の温度を算出する処理部と、を備える蛍光温度センサの故障判定方法であって、
    　前記投光部が励起光を投光する励起光投光ステップと、
    　前記処理部が前記投光部の光源点灯直後における前記受光部の受光量と第１の閾値を比較する第１比較ステップと、を有し、
    　前記第１比較ステップにおける比較に基づいて前記蛍光温度センサに故障があるかを判定する、
    蛍光温度センサの故障判定方法。     A phosphor that emits fluorescence by excitation light, a light projecting unit that lights a light source and projects excitation light onto the phosphor, a light receiving unit that receives fluorescence of the phosphor, the light projecting unit, and the light receiving unit A failure determination method for a fluorescent temperature sensor, comprising: an optical fiber that guides light between the phosphors; and a processing unit that calculates a temperature of an object to be measured based on the amount of light received by the light receiving unit,
    An excitation light projecting step in which the light projecting unit projects excitation light;
    A first comparison step in which the processing unit compares a received light amount of the light receiving unit immediately after the light source of the light projecting unit is turned on with a first threshold value;
    Determining whether the fluorescence temperature sensor has a failure based on the comparison in the first comparison step;
    Method for determining failure of fluorescent temperature sensor.
  7. 　前記処理部が前記投光部の光源点灯後所定時間経過後における前記受光部の受光量と第２の閾値を比較する第２比較ステップと、
    　前記処理部が前記投光部の光源消灯直後における前記受光部の受光量と第３の閾値を比較する第３比較ステップと、をさらに有し、
    　前記第１比較ステップ、前記第２比較ステップ、及び前記第３比較ステップにおける比較に基づいて前記蛍光温度センサの故障箇所を特定する、
    請求項６記載の蛍光温度センサの故障判定方法。     A second comparison step in which the processing unit compares a received light amount of the light receiving unit and a second threshold after a predetermined time has elapsed after the light source of the light projecting unit is turned on;
    A third comparison step in which the processing unit compares the amount of light received by the light receiving unit immediately after the light source of the light projecting unit is turned off with a third threshold value;
    Identifying a failure location of the fluorescent temperature sensor based on the comparison in the first comparison step, the second comparison step, and the third comparison step;
    The failure determination method for a fluorescent temperature sensor according to claim 6.
PCT/JP2010/053517 2009-03-18 2010-03-04 Fluorescence temperature sensor and method for determining failure of same WO2010106919A1 (en)

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