JP6520384B2 - Temperature measurement device using induced fluorescence method and temperature measurement method using induced fluorescence method - Google Patents

Description

  The present invention irradiates input light such as laser light to a temperature measurement target on which a temperature-sensitive fluorescent material is applied or adhered, and based on a change in luminance of induced light induced by the input light, The present invention relates to a temperature measurement device that measures temperature, a temperature measurement device that uses induced fluorescence, and a temperature measurement method that uses induced fluorescence.

  For example, there is a demand for measuring in real time the temperature distribution (heat generation state) of parts such as parts of bearings, parts immersed in oil, and parts used to be covered with lubricating oil. In such a case, a contact-type temperature measurement device such as a conventional thermocouple can not measure in real time in the use state. Also, as a non-contact temperature measurement method, only the temperature of the surface of the target object can be measured by the method using a conventional radiation thermometer that detects infrared rays, so if oil or the like adheres to the surface, the oil on the surface The temperature of the target part can not be measured, and the correct temperature of the target part can not be measured.

  Therefore, Patent Document 1 discloses a mixed sense in which a first temperature-sensitive fluorescent material having fluorescence emission efficiency having a first temperature dependence characteristic and a second temperature-sensitive fluorescence material having fluorescence emission efficiency having a second temperature dependence characteristic are mixed. A temperature measurement method using a warm fluorescent material is disclosed. The mixed temperature-sensitive fluorescent material is attached to the temperature measurement object, the mixed light-sensitive fluorescent material is irradiated with the input light from the ultraviolet light emitting LED, and the luminance of the first induced light from the first temperature-sensitive fluorescent material and the second sensitivity The brightness of the second induced light from the warm fluorescent material is detected, and the temperature of the temperature measurement object is determined based on the ratio of the brightness of the second induced light to the brightness of the first induced light.

JP, 2006-126014, A

In Patent Document 1, two types of induced light of a first induced light and a second induced light are generated from (one) input light, and the ratio of the luminance of the second induced light to the luminance of the first induced light is generated. Temperature The temperature of the object to be measured is measured. Therefore, it is possible to cancel the influence of the disturbance (the fluctuation of the input light, the air flow, etc.) existing between the light source emitting the input light and the temperature measurement object. However, the demerit of the following (a)-(c) is concerned by the point which is mixing two types of thermosensitive fluorescent materials.
(A) In the case of mixing two types of temperature-sensitive fluorescent materials, the medium and the first temperature-sensitive fluorescent material, the medium and the second temperature-sensitive fluorescent material, are chemically reacted although the medium such as water is used for mixing. Do not have to verify the compatibility. In the case of chemical reaction, the expected luminance may not be obtained.
(B) The compatibility must be verified so that the first temperature-sensitive fluorescent material and the second temperature-sensitive fluorescent material, which are two types of temperature-sensitive fluorescent materials, do not chemically react with each other by mixing. In the case of chemical reaction, the expected luminance may not be obtained.
(C) In the case of using water as a medium, chlorine in the medium may be affected to cause a chemical reaction or the like. In general tap water, the proportion of chlorine may differ depending on the region, the season, etc., so it may not be possible to obtain a mixed temperature-sensitive fluorescent material with stable characteristics.

  The present invention has been made in view of these points, and it is possible to obtain stable characteristics using a single thermosensitive fluorescent material without mixing two thermosensitive fluorescent materials. The temperature measurement device using induced fluorescence and the temperature measurement method using induced fluorescence, which can measure the temperature of the object to be measured more accurately in real time contactlessly without being affected by disturbances The challenge is to provide

  In order to solve the above-mentioned subject, the temperature measurement device using induction fluorescence concerning the present invention and the temperature measurement method using induction fluorescence take the following means. First, the first invention of the present invention is based on the change of the luminance of the induced light induced by the input light by irradiating the temperature-sensitive fluorescent material applied or adhered to the temperature measurement object with the input light of a predetermined wavelength. Temperature measurement device for measuring the temperature of the temperature measurement object, wherein the temperature measurement device uses the input light of the predetermined wavelength, the temperature-sensitive fluorescent material, or the temperature-sensitive fluorescent material, and the temperature measurement device using the induced fluorescence method The induced light is input to a predetermined area of the imaging device and a light source for irradiating the object, and the temperature-sensitive fluorescent material or the temperature measurement object is input to at least a part of the remaining area of the imaging device. An imaging device into which the reflected light of the input light reflected is input simultaneously with the induced light, and the change in the ratio of the luminance of the induced light to the luminance of the reflected light imaged by the imaging device Determine the temperature of the object to be measured It has a that processing device.

  A second invention of the present invention is a temperature measurement device using the induced fluorescence method according to the first invention, wherein the temperature emitted from the temperature-sensitive fluorescent material irradiated with the input light A first filter for blocking the reflected light from among the light including the induced light and the reflected light and transmitting the induced light is provided. Then, the light source simultaneously irradiates the input light to a portion where the temperature-sensitive fluorescent material is applied or adhered and a portion where the temperature-sensitive fluorescent material is not applied or adhered, In a predetermined area, the light is emitted from a portion where the temperature-sensitive fluorescent material is applied or adhered and a portion where the input light is irradiated, and is light which has passed through the first filter. The induced light is input, and at least a part of the remaining area of the imaging device is emitted from a portion where the temperature-sensitive fluorescent material is not applied or adhered and where the input light is irradiated. The reflected light, which is the reflected light, is input.

  Next, a third invention of the present invention is the temperature measurement device using the induced fluorescence method according to the first invention, wherein the temperature emitted from the temperature-sensitive fluorescent material irradiated with the input light A first filter for blocking the reflected light out of the light including the induced light and the reflected light to transmit the induced light, and the induced light emitted from the temperature-sensitive fluorescent material irradiated with the input light And a second filter for blocking the induced light from the light including the reflected light and transmitting the reflected light. Then, the light source irradiates the input light to the portion where the temperature-sensitive fluorescent material is applied or adhered, and the portion where the temperature-sensitive fluorescent material is applied or adhered to the predetermined area of the imaging device The induced light which is the light emitted from the portion where the input light is irradiated and which is the light transmitted through the first filter, and at least one of the remaining regions of the imaging device is input; In the part, the light emitted from the location where the temperature-sensitive fluorescent material is applied or adhered and the location where the input light is irradiated, is the light that has passed through the second filter. Reflected light is input.

  Next, the fourth invention of the present invention is a temperature measuring method using an induced fluorescence method, which is a temperature-sensitive fluorescent material coated or adhered to a temperature measuring object, or the temperature-sensitive fluorescent material and the temperature measuring object An input light irradiating step of irradiating the object with an input light of a predetermined wavelength, the brightness of the induced light emitted from the temperature sensitive fluorescent material irradiated with the input light, and the temperature sensitive fluorescent material irradiated with the input light Or measuring the brightness of the reflected light emitted from the temperature measurement object irradiated with the input light, the reflected light being emitted simultaneously with the induced light, and measuring the brightness of the reflected light Determining a temperature of the temperature measurement object based on a change in a ratio of luminance of the induced light.

  According to the first aspect, the induced light is input to the predetermined area of the imaging device, the reflected light is input to at least a part of the remaining area of the imaging device, and the induced light and the reflected light are simultaneously input. Then, the temperature of the temperature measurement object is calculated based on the change in the ratio of the luminance of the induced light to the luminance of the reflected light. Therefore, it is not necessary to mix two types of temperature-sensitive fluorescent materials, and stable characteristics can be obtained using a single temperature-sensitive fluorescent material. Also, by determining the temperature of the temperature measurement object based on the change of "brightness of induced light / brightness of reflected light" instead of "brightness of induced light / brightness of input light", the influence of disturbance is prevented. can do.

  According to the second invention, the induced light can be appropriately input to a predetermined area of the imaging device, and the reflected light can be appropriately input to at least a part of the remaining area of the imaging device, and the induced light and the reflected light Can be simultaneously input to the imaging device. Therefore, the brightness of the induced light / brightness of the reflected light can be determined appropriately.

  According to the third invention, the induced light can be appropriately input to the predetermined area of the imaging device, and the reflected light can be appropriately input to at least a part of the remaining area of the imaging device, and the induced light and the reflected light Can be simultaneously input to the imaging device. Therefore, the brightness of the induced light / brightness of the reflected light can be determined appropriately.

  According to the fourth aspect of the invention, there is no need to mix two temperature-sensitive fluorescent materials, and using a single temperature-sensitive fluorescent material, temperature measurement based on the change in the brightness of induced light / brightness of reflected light. A temperature measurement method using induced fluorescence, which determines the temperature of an object, can be appropriately realized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the whole structure of the temperature measurement apparatus (using the induction fluorescence method) in 1st Embodiment. It is a flow chart explaining an example of a processing procedure of a processing device of a temperature measurement device (using induction fluorescence method) in a 1st embodiment. It is a figure explaining the temperature measurement result of an ideal state in the conventional temperature measurement apparatus using the induced fluorescence method. In the conventional temperature measurement apparatus using the induced fluorescence method, it is a figure explaining the temperature measurement result of the actual state which disturbance etc. generate | occur | produced. FIG. 7 is a diagram for explaining temperature measurement results of an actual state in which a disturbance or the like occurs in the temperature measurement device (using the induced fluorescence method) in the first embodiment. It is a figure explaining the whole structure of the temperature measurement device (using induction fluorescence method) in a 2nd embodiment. It is a figure explaining the whole structure of the temperature measurement apparatus (using the induction fluorescence method) in 3rd Embodiment.

Hereinafter, embodiments of the present invention will be sequentially described with reference to the drawings.
[Overall Configuration of Temperature Measurement Device Using Induced Fluorescence Method According to First Embodiment (FIG. 1)]
The first embodiment of the temperature measurement device 1 (hereinafter referred to as the temperature measurement device 1) using the induced fluorescence method is, as shown in FIG. 1, a light source 10, a first filter 31, and an imaging device 40. And the processing device 50 and the like. In addition, the temperature-sensitive fluorescent material 20 is applied or adhered to the temperature measurement object 80.

  The light source 10 is, for example, a laser light source that emits a laser beam, and a portion of the temperature-sensitive fluorescent material 20 in which the input light Lexc of a predetermined wavelength (for example, 532 nm) is applied or adhered to the temperature measurement object 80 Irradiate the temperature-sensitive fluorescent material 20 to a place where it is not applied or adhered. In the example of FIG. 1, the area RA irradiated with the input light Lexc is a portion to which the temperature sensitive fluorescent material 20 is applied or adhered, and the area RB irradiated with the input light Lecc is a temperature sensitive fluorescent material 20 is a place which is not applied or adhered. The mixed light Lmix including the induced light Lind and the reflected light Lref is emitted from the area RA, and the reflected light Lref is emitted from the area RB.

  The thermosensitive fluorescent material 20 is, for example, Rhodamine B (registered trademark), and when irradiated with the input light Lexc of a predetermined wavelength, emits the induced light Lind of a wavelength different from that of the input light Lexc. The luminance of the induced light Lind changes in accordance with the temperature of the temperature measurement object 80 to which the thermosensitive fluorescent material 20 is applied. For example, when the wavelength of the input light Lexc is 532 [nm], the wavelength of the induced light Lind is about 670 [nm] to 680 [nm]. The temperature-sensitive fluorescent material 20 is not a mixture of a plurality of temperature-sensitive fluorescent materials by the user, but is a single (commercially available) temperature-sensitive fluorescent material and has stable characteristics.

  The temperature measurement object 80 is a tapered roller in the example shown in FIG. In the example shown in FIG. 1, the temperature-sensitive fluorescent material 20 is applied in a donut shape to the peripheral portion (portion provided with dots) excluding the central portion of the large diameter end face 81 of the tapered roller. As shown by () in FIG. 1, the temperature-sensitive fluorescent material 20 may be applied to the central portion (portion provided with dots) excluding the peripheral portion of the large diameter end face 81 of the tapered roller. In the case of the tapered roller, the peripheral portion of the large diameter end surface is in sliding contact with the flange portion of the bearing ring, and the central portion of the large diameter end surface is exposed without being in contact with the bearing ring. Therefore, when the temperature-sensitive fluorescent material is applied to the central portion of the large diameter end face, the temperature-sensitive fluorescent material is not peeled off.

  The first filter 31 is disposed between the area RA and the imaging device 40, blocks the reflected light Lref from the mixed light Lmix emitted from the area RA, and transmits the induced light Lind.

  The imaging device 40 is, for example, a CCD camera, and includes an imaging element 41. The induced light Lind emitted from the area RA and transmitted through the first filter 31 is input to an area 41A which is a predetermined area in the imaging device 41. The reflected light Lref emitted from the area RB is input to the area 41B which is at least a part of the remaining area in the imaging device 41. The imaging device 40 captures an image at a predetermined timing, and outputs, to the processing device 50, image data in which the induced light Lind is captured in the region 41A and the reflected light Lref is captured in the region 41B.

  The processing device 50 is, for example, a personal computer, and the temperature of the temperature measurement object 80 is calculated based on the change in the luminance of the induced light Lind with respect to the luminance of the reflected light Lref captured in the image data acquired from the imaging device 40. calculate. The details of the processing procedure of the processing apparatus 50 will be described below.

[[Processing procedure of processing apparatus 50 (FIG. 2) and example of measured temperature (FIG. 5)]]
For example, the light source 10 and the imaging device 40 of the temperature measurement device 1 shown in FIG. 1 are directed to the portion where the large diameter end face 81 of the tapered roller in the tapered roller bearing is exposed. A temperature sensitive fluorescent material 20 is applied to the large diameter end face 81 of each tapered roller as shown in FIG. The temperature measuring device 1 then operates the conical roller at a predetermined timing according to the procedure described below during operation of the tapered roller bearing (a state in which the inner or outer ring is rotated and each tapered roller revolves while rotating). Measure the temperature of the roller. The control program shown in the flowchart of FIG. 2 is stored in the storage device of the processing device 50.

  When the processing device 50 is activated and the control program is executed, the processing device 50 advances the process to step S10.

  In step S10, the processing device 50 controls the light source 10 to start irradiation of the input light Lexc, and proceeds to step S20. Step S10 corresponds to an input light irradiation step.

  In step S20, the processing apparatus 50 determines whether or not it is the measurement timing. If it is the measurement timing (Yes), the processing proceeds to step S30, and if it is not the measurement timing (No), the processing returns to step S20. For example, the measurement timing is the timing at which the tapered roller, which revolves while rotating, reaches the predetermined position at which the light source 10 and the imaging device 40 are directed. In addition, while rotating the inner ring and the outer ring of the tapered roller bearing in mutually different directions and adjusting each rotational speed so that the revolution of each tapered roller stops, it is possible to rotate the tapered roller on the spot. The timing for each time may be used as the measurement timing.

  When the processing proceeds to step S30, the processing device 50 takes in the image data from the imaging device 40, and proceeds to step S40.

  In step S40, the processing device 50 obtains the luminance of the induced light Lind captured in the area 41A (see FIG. 1) of the captured image data, and proceeds to step S50.

  In step S50, the processing device 50 obtains the luminance of the reflected light Lref imaged in the area 41B (see FIG. 1) of the captured image data, and proceeds to step S60. The above steps S30 to S50 correspond to the luminance measurement step.

  In step S60, the processing device 50 calculates the ratio of the luminance of the induced light Lind determined in step S40 to the luminance of the reflected light Lref determined in step S50 (“luminance of induced light Lind” / “reflected light Lref The luminance “)” is determined, the temperature of the temperature measurement object 80 is determined based on the change in the determined ratio, and the process proceeds to step S70. Step S60 corresponds to a temperature measurement step.

  In step S70, the processing apparatus 50 determines whether or not there is a measurement termination instruction. If there is a measurement termination instruction (Yes), the processing proceeds to step S80. If there is no measurement termination instruction (No), the processing step Return to S20.

  When the process proceeds to step S80, the processing device 50 controls the light source 10 to stop the irradiation of the input light Lexc, and ends the process.

● [Example of temperature measured by conventional temperature measurement method (Fig. 3, Fig. 4)]
In the conventional temperature measurement method, the temperature of the temperature measurement object is measured based on the change in “brightness of induced light Lind” / “brightness of input light Lecc”. The [brightness characteristic] shown in FIG. 3 is the case of the ideal state in the case of obtaining by the above-mentioned conventional temperature measurement method, and is the stable ideal state without fluctuation of the brightness of the input light Lexc, and the brightness of the induced light Lind. Indicates an ideal state which is rising smoothly without being affected by disturbances and the like. In this case, the change in "brightness of induced light Lind" / "brightness of input light Lexc" is smoothly rising, and is obtained based on the change of "brightness of induced light Lind" / "brightness of input light Lexc" The temperature also tends to rise smoothly, as shown in [temperature characteristics] of FIG.

  For example, in the [brightness characteristic] shown in FIG. 3, when the input light Lexc is the brightness b1 and the induced light Lind is the brightness B1 at time t1, the temperature actually measured using the thermocouple or the like is the temperature m1. Do. When this “brightness b1, brightness B1 and temperature m1” is the reference temperature, and the input light Lexc is brightness b1 and the induced light Lind is brightness B2 at time t2, the ratio of the brightness changes [brightness B1 / brightness The amount of change (Δm) in temperature from the reference temperature (temperature m1) is determined from b1] − [brightness B2 / brightness b1]. Then, the obtained Δm is added to the temperature m1 to obtain the temperature m2.

  [Brightness Characteristics] and [Temperature Characteristics] shown in FIG. 3 show an example of the conventional temperature measurement method in an ideal state. However, as shown in FIG. 4, the luminance of the input light Lexc actually irradiated to the temperature measurement object is not linear stable but fluctuates in a pulsating manner, and the luminance of the actual induced light Lind is the input light It fluctuates in response to the fluctuation of Lexc and is affected by disturbance. For example, in the example of [brightness characteristic] shown in FIG. 4, an example is shown in the case where the brightness B2 'of the induced light Lind falls due to the influence of the disturbance G1 at time t2.

  For example, the disturbance G1 is considered to be the case where the amount of attached oil increases at the position of the temperature-sensitive fluorescent material irradiated with the input light at time t2. When the adhesion amount of oil increases, the input light Lexc reaching the temperature-sensitive fluorescent material is attenuated, so the generation amount of the induced light Lind decreases. At time t2 in FIG. 4, the input light Lexc has the brightness b2 ', but the induced light Lind is reduced to the brightness B2' under the influence of the disturbance G1, and the obtained temperature is the temperature m2 '. That is, at time t2, the measured temperature m2 'is determined to be lower than the original temperature due to the influence of the disturbance G1. As another example of the disturbance G1, when the air flow is disturbed in the space between the light source and the temperature measurement object, or when a glass plate or the like is interposed between the temperature measurement object and the imaging device, There are water droplets etc. adhering to the surface. When the temperature measurement target is in the liquid, fine dust, air bubbles, and the like floating in the liquid between the temperature measurement target and the imaging device also become the disturbance G1. In the case of disturbance due to water droplets adhering to the glass surface, light may be collected by the water droplets and the brightness may increase.

  As described above, in the conventional temperature measurement method of measuring the temperature of the temperature measurement object based on the change in “brightness of induced light Lind” / “brightness of input light Lecc”, as shown in the example of FIG. It is susceptible to the disturbance existing between the temperature measurement object and the temperature measurement object, and the accuracy of the temperature measurement is low. In the disturbance, as shown in the above-mentioned example, fluctuation of the brightness of the input light, adhesion of the temperature-sensitive fluorescent material to the surface, change of the air flow in the space from the light source to the temperature measurement object, etc. There are various ones. However, in the temperature measurement device 1 according to the first embodiment described above, the temperature can be measured more accurately without being affected by these disturbances. An example is described below.

[Example of temperature measured by the temperature measurement method of the present application (processing procedure of FIG. 2) (FIG. 5)]
In the present application, unlike the conventional temperature measurement method in which the temperature of the temperature measurement object is measured based on the change of “brightness of induced light Lind” / “brightness of input light Lex”, “brightness of induced light Lind” / “ The temperature of the temperature measurement object is measured based on the change in the “brightness of the reflected light Lref”.

  As shown in the example of [brightness characteristic] of FIG. 5, when the brightness B2 'of the induced light Lind falls by the influence of the disturbance G1 at time t2 similarly to the case of FIG. 4, the brightness r2' of the reflected light Lref is also the same. Fall into Therefore, the temperature obtained based on the change in “brightness of induced light Lind” / “brightness of reflected light Lref” is affected by disturbance G1 as shown by temperature m2 ′ at time t2 of [temperature characteristic] in FIG. Show a more accurate temperature than before. Since the fluctuation or depression of the measured reflected light Lref matches the fluctuation or depression of the induced light Lind, these effects can be appropriately eliminated. Further, in the present application, since the temperature is obtained based on the change of “brightness of induced light Lind” / “brightness of reflected light Lref”, it is not affected by the change of the distance from the light source and the imaging device to the temperature measurement object. Therefore, the present invention can also be applied to non-contact real-time temperature measurement for a dynamic object whose distance between the light source and the imaging device and the temperature measurement object changes with time.

  Further, in the temperature measurement device 1 of the present application, unlike in Japanese Patent Application Laid-Open No. 2006-126014, it is not necessary to mix two types of temperature-sensitive fluorescent materials, and a single temperature-sensitive fluorescent material 20 is used. Therefore, stable luminance can be obtained without being affected by the chemical reaction between the two temperature-sensitive fluorescent materials, the chemical reaction with water as the medium at the time of mixing, chlorine in the medium such as water, etc. The temperature of the object to be measured can be measured more accurately.

[Overall Configuration of Temperature Measurement Device Using Induced Fluorescence Method According to Second Embodiment (FIG. 6)]
The temperature measurement device 1B of the second embodiment shown in FIG. 6 has a temperature sensitive fluorescent material 20 applied to the entire surface of the large diameter end face 81 to the temperature measurement device 1 of the first embodiment shown in FIG. The point of difference (or bonding) and the point of addition of the second filter 32 are different. Hereinafter, these differences will be mainly described.

  The thermosensitive fluorescent material 20 is applied (or adhered) to the entire surface of the large diameter end face 81, so the thermosensitive fluorescent material 20 is applied or adhered to both the area RC and the area RD to which the input light Lexc is irradiated. It is a place where Therefore, mixed light Lmix including the induced light Lind and the reflected light Lref is emitted from the regions RC and RD.

  The first filter 31 is disposed between the region RC and the imaging device 40, blocks the reflected light Lref from among the mixed light Lmix emitted from the region RC, and transmits the induced light Lind. The second filter 32 is disposed between the region RD and the imaging device 40, blocks the induced light Lind from among the mixed light Lmix emitted from the region RD, and transmits the reflected light Lref.

  The induced light Lind emitted from the area RC and transmitted through the first filter 31 is input to an area 41A which is a predetermined area in the imaging device 41. The reflected light Lref emitted from the area RD and transmitted through the second filter 32 is input to the area 41B which is at least a part of the remaining area in the imaging device 41.

  The other points including the processing procedure of the processing apparatus 50 are the same as those of the first embodiment, and thus the description thereof is omitted.

[Overall Configuration of Temperature Measurement Device Using Induced Fluorescence Method According to Third Embodiment (FIG. 7)]
The temperature measurement device 1C of the third embodiment shown in FIG. 7 has a temperature sensitive fluorescent material 20 applied to the entire surface of the large diameter end face 81 to the temperature measurement device 1 of the first embodiment shown in FIG. The point (or bonding) differs from the point in which the first filter 31 shown in FIG. 1 is changed to a filter 30 having a first filter 31 and a second filter 32. Hereinafter, these differences will be mainly described.

  Since the temperature-sensitive fluorescent material 20 is applied (or adhered) to the entire surface of the large diameter end face 81, the region RE irradiated with the input light Lexc is a portion where the temperature-sensitive fluorescent material 20 is applied or adhered. is there. Therefore, mixed light Lmix including the induced light Lind and the reflected light Lref is emitted from the region RE.

  The filter 30 has, for example, a substantially circular shape, and is disposed between the region RE and the imaging device 40, and has a central portion configured by the second filter 32 and a peripheral portion configured by the first filter 31. The first filter 31 blocks the reflected light Lref from among the mixed light Lmix emitted from the region RE, and transmits the induced light Lind. The second filter 32 blocks the induced light Lind from among the mixed light Lmix emitted from the region RE, and transmits the reflected light Lref.

  The induced light Lind emitted from the region RE and transmitted through the first filter 31 is input to a region 41A which is a predetermined region in the imaging element 41. The reflected light Lref emitted from the area RE and transmitted through the second filter 32 is input to the area 41B which is at least a part of the remaining area in the imaging device 41.

  The other points including the processing procedure of the processing apparatus 50 are the same as those of the first embodiment, and thus the description thereof is omitted.

  The temperature measurement device using the induced fluorescence method of the present invention is not limited to the configuration, processing procedure, and the like described in the present embodiment, and various modifications, additions, and modifications can be made without departing from the scope of the present invention. It is possible to delete.

  Although the example applied to the temperature measurement of the tapered roller of the tapered roller bearing has been described in the description of the present embodiment, the present invention is not limited to this, and is applied to the temperature measurement of various temperature measurement objects such as a retainer of a rolling bearing. It is possible.

  Further, the numerical values used in the description of the present embodiment are an example, and the present invention is not limited to these numerical values.

DESCRIPTION OF SYMBOLS 1, 1B, 1C (The induction fluorescence method is used.) Temperature measurement apparatus 10 Light source 20 Temperature-sensitive fluorescent material 30 Filter 31 1st filter 32 2nd filter 40 Imaging device 41 Imaging element 41A Area (predetermined area)
41B area (at least part of the remaining area)
50 processing apparatus 80 temperature measurement object Lexc input light Lind induced light Lmix mixed light Lref reflected light

Claims (2)

A temperature-sensitive fluorescent material applied or adhered to a temperature measurement object is irradiated with input light of a predetermined wavelength, and the temperature of the temperature measurement object is measured based on a change in luminance of induced light induced by the input light. A temperature measuring device using an induced fluorescence method,
A light source for irradiating the temperature-sensitive fluorescent material or the temperature-sensitive fluorescent material and the temperature measurement object with the input light of the predetermined wavelength;
The induced light is input to a predetermined area of the imaging element, and the reflected light of the input light reflected by the temperature-sensitive fluorescent material or the temperature measurement object is input to at least a part of the remaining area of the imaging element. An imaging device input simultaneously with the induced light;
A processing device for determining the temperature of the temperature measurement object based on a change in the ratio of the luminance of the induced light to the luminance of the reflected light imaged by the imaging device;
A first filter for blocking the reflected light from among the light including the induced light and the reflected light emitted from the portion of the temperature-sensitive fluorescent material irradiated with the input light, and transmitting the induced light;
Have
The light source simultaneously irradiates the input light to a portion where the temperature-sensitive fluorescent material is applied or adhered and a portion where the temperature-sensitive fluorescent material is not applied or adhered.
The predetermined region of the image pickup device is light emitted from a portion where the temperature-sensitive fluorescent material is applied or adhered and a portion where the input light is irradiated, and passes through the first filter The induced light is input,
The reflection which is light emitted from at least a part of the remaining area of the image pickup element at a place where the temperature-sensitive fluorescent material is not applied or adhered and where the input light is irradiated Light is input,
Temperature measurement device using induced fluorescence method. A temperature-sensitive fluorescent material applied or adhered to a temperature measurement object is irradiated with input light of a predetermined wavelength, and the temperature of the temperature measurement object is measured based on a change in luminance of induced light induced by the input light. , a temperature measuring method using the induced fluorescence,
A light source for irradiating the temperature-sensitive fluorescent material or the temperature-sensitive fluorescent material and the temperature measurement object with the input light of the predetermined wavelength;
The induced light is input to a predetermined area of the imaging element, and the reflected light of the input light reflected by the temperature-sensitive fluorescent material or the temperature measurement object is input to at least a part of the remaining area of the imaging element. An imaging device input simultaneously with the induced light;
A processing device for determining the temperature of the temperature measurement object based on a change in the ratio of the luminance of the induced light to the luminance of the reflected light imaged by the imaging device;
A first filter for blocking the reflected light from among the light including the induced light and the reflected light emitted from the portion of the temperature-sensitive fluorescent material irradiated with the input light, and transmitting the induced light;
Using
An input light irradiating step of simultaneously irradiating the input light to a portion where the temperature sensitive fluorescent material is applied or adhered and a portion where the temperature sensitive fluorescent material is not applied or adhered using the light source ;
The light emitted from the location where the temperature-sensitive fluorescent material is applied or adhered and the location where the input light is irradiated using the imaging device, and the light transmitted through the first filter From the brightness of the portion of the predetermined area of the imaging device to which the induced light is being input, and the portion where the temperature-sensitive fluorescent material is not applied or adhered and to which the input light is irradiated A luminance measurement step of measuring the luminance of at least a part of the remaining area of the image pickup element into which the reflected light which is the emitted light is input ;
Determining the temperature of the temperature measurement object based on a change in the ratio of the brightness of the induced light to the brightness of the reflected light using the processing apparatus ;
Temperature measurement method using induced fluorescence method.

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